diff options
Diffstat (limited to 'fs/nfs')
79 files changed, 35061 insertions, 13038 deletions
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index ba306658a6d..3dece03f2fc 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig @@ -29,9 +29,20 @@ config NFS_FS If unsure, say N. +config NFS_V2 + tristate "NFS client support for NFS version 2" + depends on NFS_FS + default y + help + This option enables support for version 2 of the NFS protocol + (RFC 1094) in the kernel's NFS client. + + If unsure, say Y. + config NFS_V3 - bool "NFS client support for NFS version 3" + tristate "NFS client support for NFS version 3" depends on NFS_FS + default y help This option enables support for version 3 of the NFS protocol (RFC 1813) in the kernel's NFS client. @@ -61,9 +72,10 @@ config NFS_V3_ACL If unsure, say N. config NFS_V4 - bool "NFS client support for NFS version 4" + tristate "NFS client support for NFS version 4" depends on NFS_FS select SUNRPC_GSS + select KEYS help This option enables support for version 4 of the NFS protocol (RFC 3530) in the kernel's NFS client. @@ -74,18 +86,75 @@ config NFS_V4 If unsure, say Y. +config NFS_SWAP + bool "Provide swap over NFS support" + default n + depends on NFS_FS + select SUNRPC_SWAP + help + This option enables swapon to work on files located on NFS mounts. + config NFS_V4_1 - bool "NFS client support for NFSv4.1 (EXPERIMENTAL)" - depends on NFS_FS && NFS_V4 && EXPERIMENTAL - select PNFS_FILE_LAYOUT + bool "NFS client support for NFSv4.1" + depends on NFS_V4 + select SUNRPC_BACKCHANNEL help This option enables support for minor version 1 of the NFSv4 protocol (RFC 5661) in the kernel's NFS client. If unsure, say N. +config NFS_V4_2 + bool "NFS client support for NFSv4.2" + depends on NFS_V4_1 + help + This option enables support for minor version 2 of the NFSv4 protocol + in the kernel's NFS client. + + If unsure, say N. + config PNFS_FILE_LAYOUT tristate + depends on NFS_V4_1 + default NFS_V4 + +config PNFS_BLOCK + tristate + depends on NFS_V4_1 && BLK_DEV_DM + default NFS_V4 + +config PNFS_OBJLAYOUT + tristate + depends on NFS_V4_1 && SCSI_OSD_ULD + default NFS_V4 + +config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN + string "NFSv4.1 Implementation ID Domain" + depends on NFS_V4_1 + default "kernel.org" + help + This option defines the domain portion of the implementation ID that + may be sent in the NFS exchange_id operation. The value must be in + the format of a DNS domain name and should be set to the DNS domain + name of the distribution. + If the NFS client is unchanged from the upstream kernel, this + option should be set to the default "kernel.org". + +config NFS_V4_1_MIGRATION + bool "NFSv4.1 client support for migration" + depends on NFS_V4_1 + default n + help + This option makes the NFS client advertise to NFSv4.1 servers that + it can support NFSv4 migration. + + The NFSv4.1 pieces of the Linux NFSv4 migration implementation are + still experimental. If you are not an NFSv4 developer, say N here. + +config NFS_V4_SECURITY_LABEL + bool + depends on NFS_V4_2 && SECURITY + default y config ROOT_NFS bool "Root file system on NFS" @@ -119,16 +188,10 @@ config NFS_USE_KERNEL_DNS bool depends on NFS_V4 && !NFS_USE_LEGACY_DNS select DNS_RESOLVER - select KEYS default y -config NFS_USE_NEW_IDMAPPER - bool "Use the new idmapper upcall routine" - depends on NFS_V4 && KEYS - help - Say Y here if you want NFS to use the new idmapper upcall functions. - You will need /sbin/request-key (usually provided by the keyutils - package). For details, read - <file:Documentation/filesystems/nfs/idmapper.txt>. - - If you are unsure, say N. +config NFS_DEBUG + bool + depends on NFS_FS && SUNRPC_DEBUG + select CRC32 + default y diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index 4776ff9e381..4782e0840dc 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -4,20 +4,31 @@ obj-$(CONFIG_NFS_FS) += nfs.o -nfs-y := client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \ - direct.o pagelist.o proc.o read.o symlink.o unlink.o \ - write.o namespace.o mount_clnt.o \ - dns_resolve.o cache_lib.o +CFLAGS_nfstrace.o += -I$(src) +nfs-y := client.o dir.o file.o getroot.o inode.o super.o \ + direct.o pagelist.o read.o symlink.o unlink.o \ + write.o namespace.o mount_clnt.o nfstrace.o nfs-$(CONFIG_ROOT_NFS) += nfsroot.o -nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o -nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o -nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \ - delegation.o idmap.o \ - callback.o callback_xdr.o callback_proc.o \ - nfs4namespace.o -nfs-$(CONFIG_NFS_V4_1) += pnfs.o -nfs-$(CONFIG_SYSCTL) += sysctl.o +nfs-$(CONFIG_SYSCTL) += sysctl.o nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o -obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o -nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o +obj-$(CONFIG_NFS_V2) += nfsv2.o +nfsv2-y := nfs2super.o proc.o nfs2xdr.o + +obj-$(CONFIG_NFS_V3) += nfsv3.o +nfsv3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o +nfsv3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o + +obj-$(CONFIG_NFS_V4) += nfsv4.o +CFLAGS_nfs4trace.o += -I$(src) +nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \ + delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \ + nfs4namespace.o nfs4getroot.o nfs4client.o nfs4session.o \ + dns_resolve.o nfs4trace.o +nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o +nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o +nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o + +obj-$(CONFIG_PNFS_FILE_LAYOUT) += filelayout/ +obj-$(CONFIG_PNFS_OBJLAYOUT) += objlayout/ +obj-$(CONFIG_PNFS_BLOCK) += blocklayout/ diff --git a/fs/nfs/blocklayout/Makefile b/fs/nfs/blocklayout/Makefile new file mode 100644 index 00000000000..d5815505c02 --- /dev/null +++ b/fs/nfs/blocklayout/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the pNFS block layout driver kernel module +# +obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o +blocklayoutdriver-objs := blocklayout.o extents.o blocklayoutdev.o blocklayoutdm.o diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c new file mode 100644 index 00000000000..9b431f44fad --- /dev/null +++ b/fs/nfs/blocklayout/blocklayout.c @@ -0,0 +1,1458 @@ +/* + * linux/fs/nfs/blocklayout/blocklayout.c + * + * Module for the NFSv4.1 pNFS block layout driver. + * + * Copyright (c) 2006 The Regents of the University of Michigan. + * All rights reserved. + * + * Andy Adamson <andros@citi.umich.edu> + * Fred Isaman <iisaman@umich.edu> + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/mount.h> +#include <linux/namei.h> +#include <linux/bio.h> /* struct bio */ +#include <linux/buffer_head.h> /* various write calls */ +#include <linux/prefetch.h> +#include <linux/pagevec.h> + +#include "../pnfs.h" +#include "../nfs4session.h" +#include "../internal.h" +#include "blocklayout.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Andy Adamson <andros@citi.umich.edu>"); +MODULE_DESCRIPTION("The NFSv4.1 pNFS Block layout driver"); + +static void print_page(struct page *page) +{ + dprintk("PRINTPAGE page %p\n", page); + dprintk(" PagePrivate %d\n", PagePrivate(page)); + dprintk(" PageUptodate %d\n", PageUptodate(page)); + dprintk(" PageError %d\n", PageError(page)); + dprintk(" PageDirty %d\n", PageDirty(page)); + dprintk(" PageReferenced %d\n", PageReferenced(page)); + dprintk(" PageLocked %d\n", PageLocked(page)); + dprintk(" PageWriteback %d\n", PageWriteback(page)); + dprintk(" PageMappedToDisk %d\n", PageMappedToDisk(page)); + dprintk("\n"); +} + +/* Given the be associated with isect, determine if page data needs to be + * initialized. + */ +static int is_hole(struct pnfs_block_extent *be, sector_t isect) +{ + if (be->be_state == PNFS_BLOCK_NONE_DATA) + return 1; + else if (be->be_state != PNFS_BLOCK_INVALID_DATA) + return 0; + else + return !bl_is_sector_init(be->be_inval, isect); +} + +/* Given the be associated with isect, determine if page data can be + * written to disk. + */ +static int is_writable(struct pnfs_block_extent *be, sector_t isect) +{ + return (be->be_state == PNFS_BLOCK_READWRITE_DATA || + be->be_state == PNFS_BLOCK_INVALID_DATA); +} + +/* The data we are handed might be spread across several bios. We need + * to track when the last one is finished. + */ +struct parallel_io { + struct kref refcnt; + void (*pnfs_callback) (void *data, int num_se); + void *data; + int bse_count; +}; + +static inline struct parallel_io *alloc_parallel(void *data) +{ + struct parallel_io *rv; + + rv = kmalloc(sizeof(*rv), GFP_NOFS); + if (rv) { + rv->data = data; + kref_init(&rv->refcnt); + rv->bse_count = 0; + } + return rv; +} + +static inline void get_parallel(struct parallel_io *p) +{ + kref_get(&p->refcnt); +} + +static void destroy_parallel(struct kref *kref) +{ + struct parallel_io *p = container_of(kref, struct parallel_io, refcnt); + + dprintk("%s enter\n", __func__); + p->pnfs_callback(p->data, p->bse_count); + kfree(p); +} + +static inline void put_parallel(struct parallel_io *p) +{ + kref_put(&p->refcnt, destroy_parallel); +} + +static struct bio * +bl_submit_bio(int rw, struct bio *bio) +{ + if (bio) { + get_parallel(bio->bi_private); + dprintk("%s submitting %s bio %u@%llu\n", __func__, + rw == READ ? "read" : "write", bio->bi_iter.bi_size, + (unsigned long long)bio->bi_iter.bi_sector); + submit_bio(rw, bio); + } + return NULL; +} + +static struct bio *bl_alloc_init_bio(int npg, sector_t isect, + struct pnfs_block_extent *be, + void (*end_io)(struct bio *, int err), + struct parallel_io *par) +{ + struct bio *bio; + + npg = min(npg, BIO_MAX_PAGES); + bio = bio_alloc(GFP_NOIO, npg); + if (!bio && (current->flags & PF_MEMALLOC)) { + while (!bio && (npg /= 2)) + bio = bio_alloc(GFP_NOIO, npg); + } + + if (bio) { + bio->bi_iter.bi_sector = isect - be->be_f_offset + + be->be_v_offset; + bio->bi_bdev = be->be_mdev; + bio->bi_end_io = end_io; + bio->bi_private = par; + } + return bio; +} + +static struct bio *do_add_page_to_bio(struct bio *bio, int npg, int rw, + sector_t isect, struct page *page, + struct pnfs_block_extent *be, + void (*end_io)(struct bio *, int err), + struct parallel_io *par, + unsigned int offset, int len) +{ + isect = isect + (offset >> SECTOR_SHIFT); + dprintk("%s: npg %d rw %d isect %llu offset %u len %d\n", __func__, + npg, rw, (unsigned long long)isect, offset, len); +retry: + if (!bio) { + bio = bl_alloc_init_bio(npg, isect, be, end_io, par); + if (!bio) + return ERR_PTR(-ENOMEM); + } + if (bio_add_page(bio, page, len, offset) < len) { + bio = bl_submit_bio(rw, bio); + goto retry; + } + return bio; +} + +static struct bio *bl_add_page_to_bio(struct bio *bio, int npg, int rw, + sector_t isect, struct page *page, + struct pnfs_block_extent *be, + void (*end_io)(struct bio *, int err), + struct parallel_io *par) +{ + return do_add_page_to_bio(bio, npg, rw, isect, page, be, + end_io, par, 0, PAGE_CACHE_SIZE); +} + +/* This is basically copied from mpage_end_io_read */ +static void bl_end_io_read(struct bio *bio, int err) +{ + struct parallel_io *par = bio->bi_private; + struct bio_vec *bvec; + int i; + + if (!err) + bio_for_each_segment_all(bvec, bio, i) + SetPageUptodate(bvec->bv_page); + + if (err) { + struct nfs_pgio_data *rdata = par->data; + struct nfs_pgio_header *header = rdata->header; + + if (!header->pnfs_error) + header->pnfs_error = -EIO; + pnfs_set_lo_fail(header->lseg); + } + bio_put(bio); + put_parallel(par); +} + +static void bl_read_cleanup(struct work_struct *work) +{ + struct rpc_task *task; + struct nfs_pgio_data *rdata; + dprintk("%s enter\n", __func__); + task = container_of(work, struct rpc_task, u.tk_work); + rdata = container_of(task, struct nfs_pgio_data, task); + pnfs_ld_read_done(rdata); +} + +static void +bl_end_par_io_read(void *data, int unused) +{ + struct nfs_pgio_data *rdata = data; + + rdata->task.tk_status = rdata->header->pnfs_error; + INIT_WORK(&rdata->task.u.tk_work, bl_read_cleanup); + schedule_work(&rdata->task.u.tk_work); +} + +static enum pnfs_try_status +bl_read_pagelist(struct nfs_pgio_data *rdata) +{ + struct nfs_pgio_header *header = rdata->header; + int i, hole; + struct bio *bio = NULL; + struct pnfs_block_extent *be = NULL, *cow_read = NULL; + sector_t isect, extent_length = 0; + struct parallel_io *par; + loff_t f_offset = rdata->args.offset; + size_t bytes_left = rdata->args.count; + unsigned int pg_offset, pg_len; + struct page **pages = rdata->args.pages; + int pg_index = rdata->args.pgbase >> PAGE_CACHE_SHIFT; + const bool is_dio = (header->dreq != NULL); + + dprintk("%s enter nr_pages %u offset %lld count %u\n", __func__, + rdata->pages.npages, f_offset, (unsigned int)rdata->args.count); + + par = alloc_parallel(rdata); + if (!par) + goto use_mds; + par->pnfs_callback = bl_end_par_io_read; + /* At this point, we can no longer jump to use_mds */ + + isect = (sector_t) (f_offset >> SECTOR_SHIFT); + /* Code assumes extents are page-aligned */ + for (i = pg_index; i < rdata->pages.npages; i++) { + if (!extent_length) { + /* We've used up the previous extent */ + bl_put_extent(be); + bl_put_extent(cow_read); + bio = bl_submit_bio(READ, bio); + /* Get the next one */ + be = bl_find_get_extent(BLK_LSEG2EXT(header->lseg), + isect, &cow_read); + if (!be) { + header->pnfs_error = -EIO; + goto out; + } + extent_length = be->be_length - + (isect - be->be_f_offset); + if (cow_read) { + sector_t cow_length = cow_read->be_length - + (isect - cow_read->be_f_offset); + extent_length = min(extent_length, cow_length); + } + } + + if (is_dio) { + pg_offset = f_offset & ~PAGE_CACHE_MASK; + if (pg_offset + bytes_left > PAGE_CACHE_SIZE) + pg_len = PAGE_CACHE_SIZE - pg_offset; + else + pg_len = bytes_left; + + f_offset += pg_len; + bytes_left -= pg_len; + isect += (pg_offset >> SECTOR_SHIFT); + } else { + pg_offset = 0; + pg_len = PAGE_CACHE_SIZE; + } + + hole = is_hole(be, isect); + if (hole && !cow_read) { + bio = bl_submit_bio(READ, bio); + /* Fill hole w/ zeroes w/o accessing device */ + dprintk("%s Zeroing page for hole\n", __func__); + zero_user_segment(pages[i], pg_offset, pg_len); + print_page(pages[i]); + SetPageUptodate(pages[i]); + } else { + struct pnfs_block_extent *be_read; + + be_read = (hole && cow_read) ? cow_read : be; + bio = do_add_page_to_bio(bio, rdata->pages.npages - i, + READ, + isect, pages[i], be_read, + bl_end_io_read, par, + pg_offset, pg_len); + if (IS_ERR(bio)) { + header->pnfs_error = PTR_ERR(bio); + bio = NULL; + goto out; + } + } + isect += (pg_len >> SECTOR_SHIFT); + extent_length -= PAGE_CACHE_SECTORS; + } + if ((isect << SECTOR_SHIFT) >= header->inode->i_size) { + rdata->res.eof = 1; + rdata->res.count = header->inode->i_size - rdata->args.offset; + } else { + rdata->res.count = (isect << SECTOR_SHIFT) - rdata->args.offset; + } +out: + bl_put_extent(be); + bl_put_extent(cow_read); + bl_submit_bio(READ, bio); + put_parallel(par); + return PNFS_ATTEMPTED; + + use_mds: + dprintk("Giving up and using normal NFS\n"); + return PNFS_NOT_ATTEMPTED; +} + +static void mark_extents_written(struct pnfs_block_layout *bl, + __u64 offset, __u32 count) +{ + sector_t isect, end; + struct pnfs_block_extent *be; + struct pnfs_block_short_extent *se; + + dprintk("%s(%llu, %u)\n", __func__, offset, count); + if (count == 0) + return; + isect = (offset & (long)(PAGE_CACHE_MASK)) >> SECTOR_SHIFT; + end = (offset + count + PAGE_CACHE_SIZE - 1) & (long)(PAGE_CACHE_MASK); + end >>= SECTOR_SHIFT; + while (isect < end) { + sector_t len; + be = bl_find_get_extent(bl, isect, NULL); + BUG_ON(!be); /* FIXME */ + len = min(end, be->be_f_offset + be->be_length) - isect; + if (be->be_state == PNFS_BLOCK_INVALID_DATA) { + se = bl_pop_one_short_extent(be->be_inval); + BUG_ON(!se); + bl_mark_for_commit(be, isect, len, se); + } + isect += len; + bl_put_extent(be); + } +} + +static void bl_end_io_write_zero(struct bio *bio, int err) +{ + struct parallel_io *par = bio->bi_private; + struct bio_vec *bvec; + int i; + + bio_for_each_segment_all(bvec, bio, i) { + /* This is the zeroing page we added */ + end_page_writeback(bvec->bv_page); + page_cache_release(bvec->bv_page); + } + + if (unlikely(err)) { + struct nfs_pgio_data *data = par->data; + struct nfs_pgio_header *header = data->header; + + if (!header->pnfs_error) + header->pnfs_error = -EIO; + pnfs_set_lo_fail(header->lseg); + } + bio_put(bio); + put_parallel(par); +} + +static void bl_end_io_write(struct bio *bio, int err) +{ + struct parallel_io *par = bio->bi_private; + const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); + struct nfs_pgio_data *data = par->data; + struct nfs_pgio_header *header = data->header; + + if (!uptodate) { + if (!header->pnfs_error) + header->pnfs_error = -EIO; + pnfs_set_lo_fail(header->lseg); + } + bio_put(bio); + put_parallel(par); +} + +/* Function scheduled for call during bl_end_par_io_write, + * it marks sectors as written and extends the commitlist. + */ +static void bl_write_cleanup(struct work_struct *work) +{ + struct rpc_task *task; + struct nfs_pgio_data *wdata; + dprintk("%s enter\n", __func__); + task = container_of(work, struct rpc_task, u.tk_work); + wdata = container_of(task, struct nfs_pgio_data, task); + if (likely(!wdata->header->pnfs_error)) { + /* Marks for LAYOUTCOMMIT */ + mark_extents_written(BLK_LSEG2EXT(wdata->header->lseg), + wdata->args.offset, wdata->args.count); + } + pnfs_ld_write_done(wdata); +} + +/* Called when last of bios associated with a bl_write_pagelist call finishes */ +static void bl_end_par_io_write(void *data, int num_se) +{ + struct nfs_pgio_data *wdata = data; + + if (unlikely(wdata->header->pnfs_error)) { + bl_free_short_extents(&BLK_LSEG2EXT(wdata->header->lseg)->bl_inval, + num_se); + } + + wdata->task.tk_status = wdata->header->pnfs_error; + wdata->verf.committed = NFS_FILE_SYNC; + INIT_WORK(&wdata->task.u.tk_work, bl_write_cleanup); + schedule_work(&wdata->task.u.tk_work); +} + +/* FIXME STUB - mark intersection of layout and page as bad, so is not + * used again. + */ +static void mark_bad_read(void) +{ + return; +} + +/* + * map_block: map a requested I/0 block (isect) into an offset in the LVM + * block_device + */ +static void +map_block(struct buffer_head *bh, sector_t isect, struct pnfs_block_extent *be) +{ + dprintk("%s enter be=%p\n", __func__, be); + + set_buffer_mapped(bh); + bh->b_bdev = be->be_mdev; + bh->b_blocknr = (isect - be->be_f_offset + be->be_v_offset) >> + (be->be_mdev->bd_inode->i_blkbits - SECTOR_SHIFT); + + dprintk("%s isect %llu, bh->b_blocknr %ld, using bsize %Zd\n", + __func__, (unsigned long long)isect, (long)bh->b_blocknr, + bh->b_size); + return; +} + +static void +bl_read_single_end_io(struct bio *bio, int error) +{ + struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; + struct page *page = bvec->bv_page; + + /* Only one page in bvec */ + unlock_page(page); +} + +static int +bl_do_readpage_sync(struct page *page, struct pnfs_block_extent *be, + unsigned int offset, unsigned int len) +{ + struct bio *bio; + struct page *shadow_page; + sector_t isect; + char *kaddr, *kshadow_addr; + int ret = 0; + + dprintk("%s: offset %u len %u\n", __func__, offset, len); + + shadow_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM); + if (shadow_page == NULL) + return -ENOMEM; + + bio = bio_alloc(GFP_NOIO, 1); + if (bio == NULL) + return -ENOMEM; + + isect = (page->index << PAGE_CACHE_SECTOR_SHIFT) + + (offset / SECTOR_SIZE); + + bio->bi_iter.bi_sector = isect - be->be_f_offset + be->be_v_offset; + bio->bi_bdev = be->be_mdev; + bio->bi_end_io = bl_read_single_end_io; + + lock_page(shadow_page); + if (bio_add_page(bio, shadow_page, + SECTOR_SIZE, round_down(offset, SECTOR_SIZE)) == 0) { + unlock_page(shadow_page); + bio_put(bio); + return -EIO; + } + + submit_bio(READ, bio); + wait_on_page_locked(shadow_page); + if (unlikely(!test_bit(BIO_UPTODATE, &bio->bi_flags))) { + ret = -EIO; + } else { + kaddr = kmap_atomic(page); + kshadow_addr = kmap_atomic(shadow_page); + memcpy(kaddr + offset, kshadow_addr + offset, len); + kunmap_atomic(kshadow_addr); + kunmap_atomic(kaddr); + } + __free_page(shadow_page); + bio_put(bio); + + return ret; +} + +static int +bl_read_partial_page_sync(struct page *page, struct pnfs_block_extent *be, + unsigned int dirty_offset, unsigned int dirty_len, + bool full_page) +{ + int ret = 0; + unsigned int start, end; + + if (full_page) { + start = 0; + end = PAGE_CACHE_SIZE; + } else { + start = round_down(dirty_offset, SECTOR_SIZE); + end = round_up(dirty_offset + dirty_len, SECTOR_SIZE); + } + + dprintk("%s: offset %u len %d\n", __func__, dirty_offset, dirty_len); + if (!be) { + zero_user_segments(page, start, dirty_offset, + dirty_offset + dirty_len, end); + if (start == 0 && end == PAGE_CACHE_SIZE && + trylock_page(page)) { + SetPageUptodate(page); + unlock_page(page); + } + return ret; + } + + if (start != dirty_offset) + ret = bl_do_readpage_sync(page, be, start, dirty_offset - start); + + if (!ret && (dirty_offset + dirty_len < end)) + ret = bl_do_readpage_sync(page, be, dirty_offset + dirty_len, + end - dirty_offset - dirty_len); + + return ret; +} + +/* Given an unmapped page, zero it or read in page for COW, page is locked + * by caller. + */ +static int +init_page_for_write(struct page *page, struct pnfs_block_extent *cow_read) +{ + struct buffer_head *bh = NULL; + int ret = 0; + sector_t isect; + + dprintk("%s enter, %p\n", __func__, page); + BUG_ON(PageUptodate(page)); + if (!cow_read) { + zero_user_segment(page, 0, PAGE_SIZE); + SetPageUptodate(page); + goto cleanup; + } + + bh = alloc_page_buffers(page, PAGE_CACHE_SIZE, 0); + if (!bh) { + ret = -ENOMEM; + goto cleanup; + } + + isect = (sector_t) page->index << PAGE_CACHE_SECTOR_SHIFT; + map_block(bh, isect, cow_read); + if (!bh_uptodate_or_lock(bh)) + ret = bh_submit_read(bh); + if (ret) + goto cleanup; + SetPageUptodate(page); + +cleanup: + if (bh) + free_buffer_head(bh); + if (ret) { + /* Need to mark layout with bad read...should now + * just use nfs4 for reads and writes. + */ + mark_bad_read(); + } + return ret; +} + +/* Find or create a zeroing page marked being writeback. + * Return ERR_PTR on error, NULL to indicate skip this page and page itself + * to indicate write out. + */ +static struct page * +bl_find_get_zeroing_page(struct inode *inode, pgoff_t index, + struct pnfs_block_extent *cow_read) +{ + struct page *page; + int locked = 0; + page = find_get_page(inode->i_mapping, index); + if (page) + goto check_page; + + page = find_or_create_page(inode->i_mapping, index, GFP_NOFS); + if (unlikely(!page)) { + dprintk("%s oom\n", __func__); + return ERR_PTR(-ENOMEM); + } + locked = 1; + +check_page: + /* PageDirty: Other will write this out + * PageWriteback: Other is writing this out + * PageUptodate: It was read before + */ + if (PageDirty(page) || PageWriteback(page)) { + print_page(page); + if (locked) + unlock_page(page); + page_cache_release(page); + return NULL; + } + + if (!locked) { + lock_page(page); + locked = 1; + goto check_page; + } + if (!PageUptodate(page)) { + /* New page, readin or zero it */ + init_page_for_write(page, cow_read); + } + set_page_writeback(page); + unlock_page(page); + + return page; +} + +static enum pnfs_try_status +bl_write_pagelist(struct nfs_pgio_data *wdata, int sync) +{ + struct nfs_pgio_header *header = wdata->header; + int i, ret, npg_zero, pg_index, last = 0; + struct bio *bio = NULL; + struct pnfs_block_extent *be = NULL, *cow_read = NULL; + sector_t isect, last_isect = 0, extent_length = 0; + struct parallel_io *par = NULL; + loff_t offset = wdata->args.offset; + size_t count = wdata->args.count; + unsigned int pg_offset, pg_len, saved_len; + struct page **pages = wdata->args.pages; + struct page *page; + pgoff_t index; + u64 temp; + int npg_per_block = + NFS_SERVER(header->inode)->pnfs_blksize >> PAGE_CACHE_SHIFT; + + dprintk("%s enter, %Zu@%lld\n", __func__, count, offset); + + if (header->dreq != NULL && + (!IS_ALIGNED(offset, NFS_SERVER(header->inode)->pnfs_blksize) || + !IS_ALIGNED(count, NFS_SERVER(header->inode)->pnfs_blksize))) { + dprintk("pnfsblock nonblock aligned DIO writes. Resend MDS\n"); + goto out_mds; + } + /* At this point, wdata->pages is a (sequential) list of nfs_pages. + * We want to write each, and if there is an error set pnfs_error + * to have it redone using nfs. + */ + par = alloc_parallel(wdata); + if (!par) + goto out_mds; + par->pnfs_callback = bl_end_par_io_write; + /* At this point, have to be more careful with error handling */ + + isect = (sector_t) ((offset & (long)PAGE_CACHE_MASK) >> SECTOR_SHIFT); + be = bl_find_get_extent(BLK_LSEG2EXT(header->lseg), isect, &cow_read); + if (!be || !is_writable(be, isect)) { + dprintk("%s no matching extents!\n", __func__); + goto out_mds; + } + + /* First page inside INVALID extent */ + if (be->be_state == PNFS_BLOCK_INVALID_DATA) { + if (likely(!bl_push_one_short_extent(be->be_inval))) + par->bse_count++; + else + goto out_mds; + temp = offset >> PAGE_CACHE_SHIFT; + npg_zero = do_div(temp, npg_per_block); + isect = (sector_t) (((offset - npg_zero * PAGE_CACHE_SIZE) & + (long)PAGE_CACHE_MASK) >> SECTOR_SHIFT); + extent_length = be->be_length - (isect - be->be_f_offset); + +fill_invalid_ext: + dprintk("%s need to zero %d pages\n", __func__, npg_zero); + for (;npg_zero > 0; npg_zero--) { + if (bl_is_sector_init(be->be_inval, isect)) { + dprintk("isect %llu already init\n", + (unsigned long long)isect); + goto next_page; + } + /* page ref released in bl_end_io_write_zero */ + index = isect >> PAGE_CACHE_SECTOR_SHIFT; + dprintk("%s zero %dth page: index %lu isect %llu\n", + __func__, npg_zero, index, + (unsigned long long)isect); + page = bl_find_get_zeroing_page(header->inode, index, + cow_read); + if (unlikely(IS_ERR(page))) { + header->pnfs_error = PTR_ERR(page); + goto out; + } else if (page == NULL) + goto next_page; + + ret = bl_mark_sectors_init(be->be_inval, isect, + PAGE_CACHE_SECTORS); + if (unlikely(ret)) { + dprintk("%s bl_mark_sectors_init fail %d\n", + __func__, ret); + end_page_writeback(page); + page_cache_release(page); + header->pnfs_error = ret; + goto out; + } + if (likely(!bl_push_one_short_extent(be->be_inval))) + par->bse_count++; + else { + end_page_writeback(page); + page_cache_release(page); + header->pnfs_error = -ENOMEM; + goto out; + } + /* FIXME: This should be done in bi_end_io */ + mark_extents_written(BLK_LSEG2EXT(header->lseg), + page->index << PAGE_CACHE_SHIFT, + PAGE_CACHE_SIZE); + + bio = bl_add_page_to_bio(bio, npg_zero, WRITE, + isect, page, be, + bl_end_io_write_zero, par); + if (IS_ERR(bio)) { + header->pnfs_error = PTR_ERR(bio); + bio = NULL; + goto out; + } +next_page: + isect += PAGE_CACHE_SECTORS; + extent_length -= PAGE_CACHE_SECTORS; + } + if (last) + goto write_done; + } + bio = bl_submit_bio(WRITE, bio); + + /* Middle pages */ + pg_index = wdata->args.pgbase >> PAGE_CACHE_SHIFT; + for (i = pg_index; i < wdata->pages.npages; i++) { + if (!extent_length) { + /* We've used up the previous extent */ + bl_put_extent(be); + bl_put_extent(cow_read); + bio = bl_submit_bio(WRITE, bio); + /* Get the next one */ + be = bl_find_get_extent(BLK_LSEG2EXT(header->lseg), + isect, &cow_read); + if (!be || !is_writable(be, isect)) { + header->pnfs_error = -EINVAL; + goto out; + } + if (be->be_state == PNFS_BLOCK_INVALID_DATA) { + if (likely(!bl_push_one_short_extent( + be->be_inval))) + par->bse_count++; + else { + header->pnfs_error = -ENOMEM; + goto out; + } + } + extent_length = be->be_length - + (isect - be->be_f_offset); + } + + dprintk("%s offset %lld count %Zu\n", __func__, offset, count); + pg_offset = offset & ~PAGE_CACHE_MASK; + if (pg_offset + count > PAGE_CACHE_SIZE) + pg_len = PAGE_CACHE_SIZE - pg_offset; + else + pg_len = count; + + saved_len = pg_len; + if (be->be_state == PNFS_BLOCK_INVALID_DATA && + !bl_is_sector_init(be->be_inval, isect)) { + ret = bl_read_partial_page_sync(pages[i], cow_read, + pg_offset, pg_len, true); + if (ret) { + dprintk("%s bl_read_partial_page_sync fail %d\n", + __func__, ret); + header->pnfs_error = ret; + goto out; + } + + ret = bl_mark_sectors_init(be->be_inval, isect, + PAGE_CACHE_SECTORS); + if (unlikely(ret)) { + dprintk("%s bl_mark_sectors_init fail %d\n", + __func__, ret); + header->pnfs_error = ret; + goto out; + } + + /* Expand to full page write */ + pg_offset = 0; + pg_len = PAGE_CACHE_SIZE; + } else if ((pg_offset & (SECTOR_SIZE - 1)) || + (pg_len & (SECTOR_SIZE - 1))){ + /* ahh, nasty case. We have to do sync full sector + * read-modify-write cycles. + */ + unsigned int saved_offset = pg_offset; + ret = bl_read_partial_page_sync(pages[i], be, pg_offset, + pg_len, false); + pg_offset = round_down(pg_offset, SECTOR_SIZE); + pg_len = round_up(saved_offset + pg_len, SECTOR_SIZE) + - pg_offset; + } + + + bio = do_add_page_to_bio(bio, wdata->pages.npages - i, WRITE, + isect, pages[i], be, + bl_end_io_write, par, + pg_offset, pg_len); + if (IS_ERR(bio)) { + header->pnfs_error = PTR_ERR(bio); + bio = NULL; + goto out; + } + offset += saved_len; + count -= saved_len; + isect += PAGE_CACHE_SECTORS; + last_isect = isect; + extent_length -= PAGE_CACHE_SECTORS; + } + + /* Last page inside INVALID extent */ + if (be->be_state == PNFS_BLOCK_INVALID_DATA) { + bio = bl_submit_bio(WRITE, bio); + temp = last_isect >> PAGE_CACHE_SECTOR_SHIFT; + npg_zero = npg_per_block - do_div(temp, npg_per_block); + if (npg_zero < npg_per_block) { + last = 1; + goto fill_invalid_ext; + } + } + +write_done: + wdata->res.count = wdata->args.count; +out: + bl_put_extent(be); + bl_put_extent(cow_read); + bl_submit_bio(WRITE, bio); + put_parallel(par); + return PNFS_ATTEMPTED; +out_mds: + bl_put_extent(be); + bl_put_extent(cow_read); + kfree(par); + return PNFS_NOT_ATTEMPTED; +} + +/* FIXME - range ignored */ +static void +release_extents(struct pnfs_block_layout *bl, struct pnfs_layout_range *range) +{ + int i; + struct pnfs_block_extent *be; + + spin_lock(&bl->bl_ext_lock); + for (i = 0; i < EXTENT_LISTS; i++) { + while (!list_empty(&bl->bl_extents[i])) { + be = list_first_entry(&bl->bl_extents[i], + struct pnfs_block_extent, + be_node); + list_del(&be->be_node); + bl_put_extent(be); + } + } + spin_unlock(&bl->bl_ext_lock); +} + +static void +release_inval_marks(struct pnfs_inval_markings *marks) +{ + struct pnfs_inval_tracking *pos, *temp; + struct pnfs_block_short_extent *se, *stemp; + + list_for_each_entry_safe(pos, temp, &marks->im_tree.mtt_stub, it_link) { + list_del(&pos->it_link); + kfree(pos); + } + + list_for_each_entry_safe(se, stemp, &marks->im_extents, bse_node) { + list_del(&se->bse_node); + kfree(se); + } + return; +} + +static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo) +{ + struct pnfs_block_layout *bl = BLK_LO2EXT(lo); + + dprintk("%s enter\n", __func__); + release_extents(bl, NULL); + release_inval_marks(&bl->bl_inval); + kfree(bl); +} + +static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode, + gfp_t gfp_flags) +{ + struct pnfs_block_layout *bl; + + dprintk("%s enter\n", __func__); + bl = kzalloc(sizeof(*bl), gfp_flags); + if (!bl) + return NULL; + spin_lock_init(&bl->bl_ext_lock); + INIT_LIST_HEAD(&bl->bl_extents[0]); + INIT_LIST_HEAD(&bl->bl_extents[1]); + INIT_LIST_HEAD(&bl->bl_commit); + INIT_LIST_HEAD(&bl->bl_committing); + bl->bl_count = 0; + bl->bl_blocksize = NFS_SERVER(inode)->pnfs_blksize >> SECTOR_SHIFT; + BL_INIT_INVAL_MARKS(&bl->bl_inval, bl->bl_blocksize); + return &bl->bl_layout; +} + +static void bl_free_lseg(struct pnfs_layout_segment *lseg) +{ + dprintk("%s enter\n", __func__); + kfree(lseg); +} + +/* We pretty much ignore lseg, and store all data layout wide, so we + * can correctly merge. + */ +static struct pnfs_layout_segment *bl_alloc_lseg(struct pnfs_layout_hdr *lo, + struct nfs4_layoutget_res *lgr, + gfp_t gfp_flags) +{ + struct pnfs_layout_segment *lseg; + int status; + + dprintk("%s enter\n", __func__); + lseg = kzalloc(sizeof(*lseg), gfp_flags); + if (!lseg) + return ERR_PTR(-ENOMEM); + status = nfs4_blk_process_layoutget(lo, lgr, gfp_flags); + if (status) { + /* We don't want to call the full-blown bl_free_lseg, + * since on error extents were not touched. + */ + kfree(lseg); + return ERR_PTR(status); + } + return lseg; +} + +static void +bl_encode_layoutcommit(struct pnfs_layout_hdr *lo, struct xdr_stream *xdr, + const struct nfs4_layoutcommit_args *arg) +{ + dprintk("%s enter\n", __func__); + encode_pnfs_block_layoutupdate(BLK_LO2EXT(lo), xdr, arg); +} + +static void +bl_cleanup_layoutcommit(struct nfs4_layoutcommit_data *lcdata) +{ + struct pnfs_layout_hdr *lo = NFS_I(lcdata->args.inode)->layout; + + dprintk("%s enter\n", __func__); + clean_pnfs_block_layoutupdate(BLK_LO2EXT(lo), &lcdata->args, lcdata->res.status); +} + +static void free_blk_mountid(struct block_mount_id *mid) +{ + if (mid) { + struct pnfs_block_dev *dev, *tmp; + + /* No need to take bm_lock as we are last user freeing bm_devlist */ + list_for_each_entry_safe(dev, tmp, &mid->bm_devlist, bm_node) { + list_del(&dev->bm_node); + bl_free_block_dev(dev); + } + kfree(mid); + } +} + +/* This is mostly copied from the filelayout_get_device_info function. + * It seems much of this should be at the generic pnfs level. + */ +static struct pnfs_block_dev * +nfs4_blk_get_deviceinfo(struct nfs_server *server, const struct nfs_fh *fh, + struct nfs4_deviceid *d_id) +{ + struct pnfs_device *dev; + struct pnfs_block_dev *rv; + u32 max_resp_sz; + int max_pages; + struct page **pages = NULL; + int i, rc; + + /* + * Use the session max response size as the basis for setting + * GETDEVICEINFO's maxcount + */ + max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; + max_pages = nfs_page_array_len(0, max_resp_sz); + dprintk("%s max_resp_sz %u max_pages %d\n", + __func__, max_resp_sz, max_pages); + + dev = kmalloc(sizeof(*dev), GFP_NOFS); + if (!dev) { + dprintk("%s kmalloc failed\n", __func__); + return ERR_PTR(-ENOMEM); + } + + pages = kzalloc(max_pages * sizeof(struct page *), GFP_NOFS); + if (pages == NULL) { + kfree(dev); + return ERR_PTR(-ENOMEM); + } + for (i = 0; i < max_pages; i++) { + pages[i] = alloc_page(GFP_NOFS); + if (!pages[i]) { + rv = ERR_PTR(-ENOMEM); + goto out_free; + } + } + + memcpy(&dev->dev_id, d_id, sizeof(*d_id)); + dev->layout_type = LAYOUT_BLOCK_VOLUME; + dev->pages = pages; + dev->pgbase = 0; + dev->pglen = PAGE_SIZE * max_pages; + dev->mincount = 0; + dev->maxcount = max_resp_sz - nfs41_maxgetdevinfo_overhead; + + dprintk("%s: dev_id: %s\n", __func__, dev->dev_id.data); + rc = nfs4_proc_getdeviceinfo(server, dev, NULL); + dprintk("%s getdevice info returns %d\n", __func__, rc); + if (rc) { + rv = ERR_PTR(rc); + goto out_free; + } + + rv = nfs4_blk_decode_device(server, dev); + out_free: + for (i = 0; i < max_pages; i++) + __free_page(pages[i]); + kfree(pages); + kfree(dev); + return rv; +} + +static int +bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh) +{ + struct block_mount_id *b_mt_id = NULL; + struct pnfs_devicelist *dlist = NULL; + struct pnfs_block_dev *bdev; + LIST_HEAD(block_disklist); + int status, i; + + dprintk("%s enter\n", __func__); + + if (server->pnfs_blksize == 0) { + dprintk("%s Server did not return blksize\n", __func__); + return -EINVAL; + } + b_mt_id = kzalloc(sizeof(struct block_mount_id), GFP_NOFS); + if (!b_mt_id) { + status = -ENOMEM; + goto out_error; + } + /* Initialize nfs4 block layout mount id */ + spin_lock_init(&b_mt_id->bm_lock); + INIT_LIST_HEAD(&b_mt_id->bm_devlist); + + dlist = kmalloc(sizeof(struct pnfs_devicelist), GFP_NOFS); + if (!dlist) { + status = -ENOMEM; + goto out_error; + } + dlist->eof = 0; + while (!dlist->eof) { + status = nfs4_proc_getdevicelist(server, fh, dlist); + if (status) + goto out_error; + dprintk("%s GETDEVICELIST numdevs=%i, eof=%i\n", + __func__, dlist->num_devs, dlist->eof); + for (i = 0; i < dlist->num_devs; i++) { + bdev = nfs4_blk_get_deviceinfo(server, fh, + &dlist->dev_id[i]); + if (IS_ERR(bdev)) { + status = PTR_ERR(bdev); + goto out_error; + } + spin_lock(&b_mt_id->bm_lock); + list_add(&bdev->bm_node, &b_mt_id->bm_devlist); + spin_unlock(&b_mt_id->bm_lock); + } + } + dprintk("%s SUCCESS\n", __func__); + server->pnfs_ld_data = b_mt_id; + + out_return: + kfree(dlist); + return status; + + out_error: + free_blk_mountid(b_mt_id); + goto out_return; +} + +static int +bl_clear_layoutdriver(struct nfs_server *server) +{ + struct block_mount_id *b_mt_id = server->pnfs_ld_data; + + dprintk("%s enter\n", __func__); + free_blk_mountid(b_mt_id); + dprintk("%s RETURNS\n", __func__); + return 0; +} + +static bool +is_aligned_req(struct nfs_page *req, unsigned int alignment) +{ + return IS_ALIGNED(req->wb_offset, alignment) && + IS_ALIGNED(req->wb_bytes, alignment); +} + +static void +bl_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) +{ + if (pgio->pg_dreq != NULL && + !is_aligned_req(req, SECTOR_SIZE)) + nfs_pageio_reset_read_mds(pgio); + else + pnfs_generic_pg_init_read(pgio, req); +} + +/* + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. + */ +static size_t +bl_pg_test_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, + struct nfs_page *req) +{ + if (pgio->pg_dreq != NULL && + !is_aligned_req(req, SECTOR_SIZE)) + return 0; + + return pnfs_generic_pg_test(pgio, prev, req); +} + +/* + * Return the number of contiguous bytes for a given inode + * starting at page frame idx. + */ +static u64 pnfs_num_cont_bytes(struct inode *inode, pgoff_t idx) +{ + struct address_space *mapping = inode->i_mapping; + pgoff_t end; + + /* Optimize common case that writes from 0 to end of file */ + end = DIV_ROUND_UP(i_size_read(inode), PAGE_CACHE_SIZE); + if (end != NFS_I(inode)->npages) { + rcu_read_lock(); + end = page_cache_next_hole(mapping, idx + 1, ULONG_MAX); + rcu_read_unlock(); + } + + if (!end) + return i_size_read(inode) - (idx << PAGE_CACHE_SHIFT); + else + return (end - idx) << PAGE_CACHE_SHIFT; +} + +static void +bl_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) +{ + if (pgio->pg_dreq != NULL && + !is_aligned_req(req, PAGE_CACHE_SIZE)) { + nfs_pageio_reset_write_mds(pgio); + } else { + u64 wb_size; + if (pgio->pg_dreq == NULL) + wb_size = pnfs_num_cont_bytes(pgio->pg_inode, + req->wb_index); + else + wb_size = nfs_dreq_bytes_left(pgio->pg_dreq); + + pnfs_generic_pg_init_write(pgio, req, wb_size); + } +} + +/* + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. + */ +static size_t +bl_pg_test_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, + struct nfs_page *req) +{ + if (pgio->pg_dreq != NULL && + !is_aligned_req(req, PAGE_CACHE_SIZE)) + return 0; + + return pnfs_generic_pg_test(pgio, prev, req); +} + +static const struct nfs_pageio_ops bl_pg_read_ops = { + .pg_init = bl_pg_init_read, + .pg_test = bl_pg_test_read, + .pg_doio = pnfs_generic_pg_readpages, +}; + +static const struct nfs_pageio_ops bl_pg_write_ops = { + .pg_init = bl_pg_init_write, + .pg_test = bl_pg_test_write, + .pg_doio = pnfs_generic_pg_writepages, +}; + +static struct pnfs_layoutdriver_type blocklayout_type = { + .id = LAYOUT_BLOCK_VOLUME, + .name = "LAYOUT_BLOCK_VOLUME", + .owner = THIS_MODULE, + .read_pagelist = bl_read_pagelist, + .write_pagelist = bl_write_pagelist, + .alloc_layout_hdr = bl_alloc_layout_hdr, + .free_layout_hdr = bl_free_layout_hdr, + .alloc_lseg = bl_alloc_lseg, + .free_lseg = bl_free_lseg, + .encode_layoutcommit = bl_encode_layoutcommit, + .cleanup_layoutcommit = bl_cleanup_layoutcommit, + .set_layoutdriver = bl_set_layoutdriver, + .clear_layoutdriver = bl_clear_layoutdriver, + .pg_read_ops = &bl_pg_read_ops, + .pg_write_ops = &bl_pg_write_ops, +}; + +static const struct rpc_pipe_ops bl_upcall_ops = { + .upcall = rpc_pipe_generic_upcall, + .downcall = bl_pipe_downcall, + .destroy_msg = bl_pipe_destroy_msg, +}; + +static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb, + struct rpc_pipe *pipe) +{ + struct dentry *dir, *dentry; + + dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME); + if (dir == NULL) + return ERR_PTR(-ENOENT); + dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe); + dput(dir); + return dentry; +} + +static void nfs4blocklayout_unregister_sb(struct super_block *sb, + struct rpc_pipe *pipe) +{ + if (pipe->dentry) + rpc_unlink(pipe->dentry); +} + +static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, + void *ptr) +{ + struct super_block *sb = ptr; + struct net *net = sb->s_fs_info; + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct dentry *dentry; + int ret = 0; + + if (!try_module_get(THIS_MODULE)) + return 0; + + if (nn->bl_device_pipe == NULL) { + module_put(THIS_MODULE); + return 0; + } + + switch (event) { + case RPC_PIPEFS_MOUNT: + dentry = nfs4blocklayout_register_sb(sb, nn->bl_device_pipe); + if (IS_ERR(dentry)) { + ret = PTR_ERR(dentry); + break; + } + nn->bl_device_pipe->dentry = dentry; + break; + case RPC_PIPEFS_UMOUNT: + if (nn->bl_device_pipe->dentry) + nfs4blocklayout_unregister_sb(sb, nn->bl_device_pipe); + break; + default: + ret = -ENOTSUPP; + break; + } + module_put(THIS_MODULE); + return ret; +} + +static struct notifier_block nfs4blocklayout_block = { + .notifier_call = rpc_pipefs_event, +}; + +static struct dentry *nfs4blocklayout_register_net(struct net *net, + struct rpc_pipe *pipe) +{ + struct super_block *pipefs_sb; + struct dentry *dentry; + + pipefs_sb = rpc_get_sb_net(net); + if (!pipefs_sb) + return NULL; + dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe); + rpc_put_sb_net(net); + return dentry; +} + +static void nfs4blocklayout_unregister_net(struct net *net, + struct rpc_pipe *pipe) +{ + struct super_block *pipefs_sb; + + pipefs_sb = rpc_get_sb_net(net); + if (pipefs_sb) { + nfs4blocklayout_unregister_sb(pipefs_sb, pipe); + rpc_put_sb_net(net); + } +} + +static int nfs4blocklayout_net_init(struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct dentry *dentry; + + init_waitqueue_head(&nn->bl_wq); + nn->bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0); + if (IS_ERR(nn->bl_device_pipe)) + return PTR_ERR(nn->bl_device_pipe); + dentry = nfs4blocklayout_register_net(net, nn->bl_device_pipe); + if (IS_ERR(dentry)) { + rpc_destroy_pipe_data(nn->bl_device_pipe); + return PTR_ERR(dentry); + } + nn->bl_device_pipe->dentry = dentry; + return 0; +} + +static void nfs4blocklayout_net_exit(struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + + nfs4blocklayout_unregister_net(net, nn->bl_device_pipe); + rpc_destroy_pipe_data(nn->bl_device_pipe); + nn->bl_device_pipe = NULL; +} + +static struct pernet_operations nfs4blocklayout_net_ops = { + .init = nfs4blocklayout_net_init, + .exit = nfs4blocklayout_net_exit, +}; + +static int __init nfs4blocklayout_init(void) +{ + int ret; + + dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__); + + ret = pnfs_register_layoutdriver(&blocklayout_type); + if (ret) + goto out; + + ret = rpc_pipefs_notifier_register(&nfs4blocklayout_block); + if (ret) + goto out_remove; + ret = register_pernet_subsys(&nfs4blocklayout_net_ops); + if (ret) + goto out_notifier; +out: + return ret; + +out_notifier: + rpc_pipefs_notifier_unregister(&nfs4blocklayout_block); +out_remove: + pnfs_unregister_layoutdriver(&blocklayout_type); + return ret; +} + +static void __exit nfs4blocklayout_exit(void) +{ + dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n", + __func__); + + rpc_pipefs_notifier_unregister(&nfs4blocklayout_block); + unregister_pernet_subsys(&nfs4blocklayout_net_ops); + pnfs_unregister_layoutdriver(&blocklayout_type); +} + +MODULE_ALIAS("nfs-layouttype4-3"); + +module_init(nfs4blocklayout_init); +module_exit(nfs4blocklayout_exit); diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h new file mode 100644 index 00000000000..9838fb02047 --- /dev/null +++ b/fs/nfs/blocklayout/blocklayout.h @@ -0,0 +1,211 @@ +/* + * linux/fs/nfs/blocklayout/blocklayout.h + * + * Module for the NFSv4.1 pNFS block layout driver. + * + * Copyright (c) 2006 The Regents of the University of Michigan. + * All rights reserved. + * + * Andy Adamson <andros@citi.umich.edu> + * Fred Isaman <iisaman@umich.edu> + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ +#ifndef FS_NFS_NFS4BLOCKLAYOUT_H +#define FS_NFS_NFS4BLOCKLAYOUT_H + +#include <linux/device-mapper.h> +#include <linux/nfs_fs.h> +#include <linux/sunrpc/rpc_pipe_fs.h> + +#include "../nfs4_fs.h" +#include "../pnfs.h" +#include "../netns.h" + +#define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT) +#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT) +#define SECTOR_SIZE (1 << SECTOR_SHIFT) + +struct block_mount_id { + spinlock_t bm_lock; /* protects list */ + struct list_head bm_devlist; /* holds pnfs_block_dev */ +}; + +struct pnfs_block_dev { + struct list_head bm_node; + struct nfs4_deviceid bm_mdevid; /* associated devid */ + struct block_device *bm_mdev; /* meta device itself */ + struct net *net; +}; + +enum exstate4 { + PNFS_BLOCK_READWRITE_DATA = 0, + PNFS_BLOCK_READ_DATA = 1, + PNFS_BLOCK_INVALID_DATA = 2, /* mapped, but data is invalid */ + PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */ +}; + +#define MY_MAX_TAGS (15) /* tag bitnums used must be less than this */ + +struct my_tree { + sector_t mtt_step_size; /* Internal sector alignment */ + struct list_head mtt_stub; /* Should be a radix tree */ +}; + +struct pnfs_inval_markings { + spinlock_t im_lock; + struct my_tree im_tree; /* Sectors that need LAYOUTCOMMIT */ + sector_t im_block_size; /* Server blocksize in sectors */ + struct list_head im_extents; /* Short extents for INVAL->RW conversion */ +}; + +struct pnfs_inval_tracking { + struct list_head it_link; + int it_sector; + int it_tags; +}; + +/* sector_t fields are all in 512-byte sectors */ +struct pnfs_block_extent { + struct kref be_refcnt; + struct list_head be_node; /* link into lseg list */ + struct nfs4_deviceid be_devid; /* FIXME: could use device cache instead */ + struct block_device *be_mdev; + sector_t be_f_offset; /* the starting offset in the file */ + sector_t be_length; /* the size of the extent */ + sector_t be_v_offset; /* the starting offset in the volume */ + enum exstate4 be_state; /* the state of this extent */ + struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */ +}; + +/* Shortened extent used by LAYOUTCOMMIT */ +struct pnfs_block_short_extent { + struct list_head bse_node; + struct nfs4_deviceid bse_devid; + struct block_device *bse_mdev; + sector_t bse_f_offset; /* the starting offset in the file */ + sector_t bse_length; /* the size of the extent */ +}; + +static inline void +BL_INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize) +{ + spin_lock_init(&marks->im_lock); + INIT_LIST_HEAD(&marks->im_tree.mtt_stub); + INIT_LIST_HEAD(&marks->im_extents); + marks->im_block_size = blocksize; + marks->im_tree.mtt_step_size = min((sector_t)PAGE_CACHE_SECTORS, + blocksize); +} + +enum extentclass4 { + RW_EXTENT = 0, /* READWRTE and INVAL */ + RO_EXTENT = 1, /* READ and NONE */ + EXTENT_LISTS = 2, +}; + +static inline int bl_choose_list(enum exstate4 state) +{ + if (state == PNFS_BLOCK_READ_DATA || state == PNFS_BLOCK_NONE_DATA) + return RO_EXTENT; + else + return RW_EXTENT; +} + +struct pnfs_block_layout { + struct pnfs_layout_hdr bl_layout; + struct pnfs_inval_markings bl_inval; /* tracks INVAL->RW transition */ + spinlock_t bl_ext_lock; /* Protects list manipulation */ + struct list_head bl_extents[EXTENT_LISTS]; /* R and RW extents */ + struct list_head bl_commit; /* Needs layout commit */ + struct list_head bl_committing; /* Layout committing */ + unsigned int bl_count; /* entries in bl_commit */ + sector_t bl_blocksize; /* Server blocksize in sectors */ +}; + +#define BLK_ID(lo) ((struct block_mount_id *)(NFS_SERVER(lo->plh_inode)->pnfs_ld_data)) + +static inline struct pnfs_block_layout * +BLK_LO2EXT(struct pnfs_layout_hdr *lo) +{ + return container_of(lo, struct pnfs_block_layout, bl_layout); +} + +static inline struct pnfs_block_layout * +BLK_LSEG2EXT(struct pnfs_layout_segment *lseg) +{ + return BLK_LO2EXT(lseg->pls_layout); +} + +struct bl_pipe_msg { + struct rpc_pipe_msg msg; + wait_queue_head_t *bl_wq; +}; + +struct bl_msg_hdr { + u8 type; + u16 totallen; /* length of entire message, including hdr itself */ +}; + +#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */ +#define BL_DEVICE_MOUNT 0x1 /* Mount--create devices*/ +#define BL_DEVICE_REQUEST_INIT 0x0 /* Start request */ +#define BL_DEVICE_REQUEST_PROC 0x1 /* User level process succeeds */ +#define BL_DEVICE_REQUEST_ERR 0x2 /* User level process fails */ + +/* blocklayoutdev.c */ +ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t); +void bl_pipe_destroy_msg(struct rpc_pipe_msg *); +void nfs4_blkdev_put(struct block_device *bdev); +struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server, + struct pnfs_device *dev); +int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo, + struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); + +/* blocklayoutdm.c */ +void bl_free_block_dev(struct pnfs_block_dev *bdev); + +/* extents.c */ +struct pnfs_block_extent * +bl_find_get_extent(struct pnfs_block_layout *bl, sector_t isect, + struct pnfs_block_extent **cow_read); +int bl_mark_sectors_init(struct pnfs_inval_markings *marks, + sector_t offset, sector_t length); +void bl_put_extent(struct pnfs_block_extent *be); +struct pnfs_block_extent *bl_alloc_extent(void); +int bl_is_sector_init(struct pnfs_inval_markings *marks, sector_t isect); +int encode_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, + struct xdr_stream *xdr, + const struct nfs4_layoutcommit_args *arg); +void clean_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, + const struct nfs4_layoutcommit_args *arg, + int status); +int bl_add_merge_extent(struct pnfs_block_layout *bl, + struct pnfs_block_extent *new); +int bl_mark_for_commit(struct pnfs_block_extent *be, + sector_t offset, sector_t length, + struct pnfs_block_short_extent *new); +int bl_push_one_short_extent(struct pnfs_inval_markings *marks); +struct pnfs_block_short_extent * +bl_pop_one_short_extent(struct pnfs_inval_markings *marks); +void bl_free_short_extents(struct pnfs_inval_markings *marks, int num_to_free); + +#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */ diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c new file mode 100644 index 00000000000..04303b5c936 --- /dev/null +++ b/fs/nfs/blocklayout/blocklayoutdev.c @@ -0,0 +1,384 @@ +/* + * linux/fs/nfs/blocklayout/blocklayoutdev.c + * + * Device operations for the pnfs nfs4 file layout driver. + * + * Copyright (c) 2006 The Regents of the University of Michigan. + * All rights reserved. + * + * Andy Adamson <andros@citi.umich.edu> + * Fred Isaman <iisaman@umich.edu> + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ +#include <linux/module.h> +#include <linux/buffer_head.h> /* __bread */ + +#include <linux/genhd.h> +#include <linux/blkdev.h> +#include <linux/hash.h> + +#include "blocklayout.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +static int decode_sector_number(__be32 **rp, sector_t *sp) +{ + uint64_t s; + + *rp = xdr_decode_hyper(*rp, &s); + if (s & 0x1ff) { + printk(KERN_WARNING "NFS: %s: sector not aligned\n", __func__); + return -1; + } + *sp = s >> SECTOR_SHIFT; + return 0; +} + +/* + * Release the block device + */ +void nfs4_blkdev_put(struct block_device *bdev) +{ + dprintk("%s for device %d:%d\n", __func__, MAJOR(bdev->bd_dev), + MINOR(bdev->bd_dev)); + blkdev_put(bdev, FMODE_READ); +} + +ssize_t bl_pipe_downcall(struct file *filp, const char __user *src, + size_t mlen) +{ + struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info, + nfs_net_id); + + if (mlen != sizeof (struct bl_dev_msg)) + return -EINVAL; + + if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0) + return -EFAULT; + + wake_up(&nn->bl_wq); + + return mlen; +} + +void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg) +{ + struct bl_pipe_msg *bl_pipe_msg = container_of(msg, struct bl_pipe_msg, msg); + + if (msg->errno >= 0) + return; + wake_up(bl_pipe_msg->bl_wq); +} + +/* + * Decodes pnfs_block_deviceaddr4 which is XDR encoded in dev->dev_addr_buf. + */ +struct pnfs_block_dev * +nfs4_blk_decode_device(struct nfs_server *server, + struct pnfs_device *dev) +{ + struct pnfs_block_dev *rv; + struct block_device *bd = NULL; + struct bl_pipe_msg bl_pipe_msg; + struct rpc_pipe_msg *msg = &bl_pipe_msg.msg; + struct bl_msg_hdr bl_msg = { + .type = BL_DEVICE_MOUNT, + .totallen = dev->mincount, + }; + uint8_t *dataptr; + DECLARE_WAITQUEUE(wq, current); + int offset, len, i, rc; + struct net *net = server->nfs_client->cl_net; + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct bl_dev_msg *reply = &nn->bl_mount_reply; + + dprintk("%s CREATING PIPEFS MESSAGE\n", __func__); + dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data, + dev->mincount); + + bl_pipe_msg.bl_wq = &nn->bl_wq; + memset(msg, 0, sizeof(*msg)); + msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, GFP_NOFS); + if (!msg->data) { + rv = ERR_PTR(-ENOMEM); + goto out; + } + + memcpy(msg->data, &bl_msg, sizeof(bl_msg)); + dataptr = (uint8_t *) msg->data; + len = dev->mincount; + offset = sizeof(bl_msg); + for (i = 0; len > 0; i++) { + memcpy(&dataptr[offset], page_address(dev->pages[i]), + len < PAGE_CACHE_SIZE ? len : PAGE_CACHE_SIZE); + len -= PAGE_CACHE_SIZE; + offset += PAGE_CACHE_SIZE; + } + msg->len = sizeof(bl_msg) + dev->mincount; + + dprintk("%s CALLING USERSPACE DAEMON\n", __func__); + add_wait_queue(&nn->bl_wq, &wq); + rc = rpc_queue_upcall(nn->bl_device_pipe, msg); + if (rc < 0) { + remove_wait_queue(&nn->bl_wq, &wq); + rv = ERR_PTR(rc); + goto out; + } + + set_current_state(TASK_UNINTERRUPTIBLE); + schedule(); + __set_current_state(TASK_RUNNING); + remove_wait_queue(&nn->bl_wq, &wq); + + if (reply->status != BL_DEVICE_REQUEST_PROC) { + dprintk("%s failed to open device: %d\n", + __func__, reply->status); + rv = ERR_PTR(-EINVAL); + goto out; + } + + bd = blkdev_get_by_dev(MKDEV(reply->major, reply->minor), + FMODE_READ, NULL); + if (IS_ERR(bd)) { + dprintk("%s failed to open device : %ld\n", __func__, + PTR_ERR(bd)); + rv = ERR_CAST(bd); + goto out; + } + + rv = kzalloc(sizeof(*rv), GFP_NOFS); + if (!rv) { + rv = ERR_PTR(-ENOMEM); + goto out; + } + + rv->bm_mdev = bd; + memcpy(&rv->bm_mdevid, &dev->dev_id, sizeof(struct nfs4_deviceid)); + rv->net = net; + dprintk("%s Created device %s with bd_block_size %u\n", + __func__, + bd->bd_disk->disk_name, + bd->bd_block_size); + +out: + kfree(msg->data); + return rv; +} + +/* Map deviceid returned by the server to constructed block_device */ +static struct block_device *translate_devid(struct pnfs_layout_hdr *lo, + struct nfs4_deviceid *id) +{ + struct block_device *rv = NULL; + struct block_mount_id *mid; + struct pnfs_block_dev *dev; + + dprintk("%s enter, lo=%p, id=%p\n", __func__, lo, id); + mid = BLK_ID(lo); + spin_lock(&mid->bm_lock); + list_for_each_entry(dev, &mid->bm_devlist, bm_node) { + if (memcmp(id->data, dev->bm_mdevid.data, + NFS4_DEVICEID4_SIZE) == 0) { + rv = dev->bm_mdev; + goto out; + } + } + out: + spin_unlock(&mid->bm_lock); + dprintk("%s returning %p\n", __func__, rv); + return rv; +} + +/* Tracks info needed to ensure extents in layout obey constraints of spec */ +struct layout_verification { + u32 mode; /* R or RW */ + u64 start; /* Expected start of next non-COW extent */ + u64 inval; /* Start of INVAL coverage */ + u64 cowread; /* End of COW read coverage */ +}; + +/* Verify the extent meets the layout requirements of the pnfs-block draft, + * section 2.3.1. + */ +static int verify_extent(struct pnfs_block_extent *be, + struct layout_verification *lv) +{ + if (lv->mode == IOMODE_READ) { + if (be->be_state == PNFS_BLOCK_READWRITE_DATA || + be->be_state == PNFS_BLOCK_INVALID_DATA) + return -EIO; + if (be->be_f_offset != lv->start) + return -EIO; + lv->start += be->be_length; + return 0; + } + /* lv->mode == IOMODE_RW */ + if (be->be_state == PNFS_BLOCK_READWRITE_DATA) { + if (be->be_f_offset != lv->start) + return -EIO; + if (lv->cowread > lv->start) + return -EIO; + lv->start += be->be_length; + lv->inval = lv->start; + return 0; + } else if (be->be_state == PNFS_BLOCK_INVALID_DATA) { + if (be->be_f_offset != lv->start) + return -EIO; + lv->start += be->be_length; + return 0; + } else if (be->be_state == PNFS_BLOCK_READ_DATA) { + if (be->be_f_offset > lv->start) + return -EIO; + if (be->be_f_offset < lv->inval) + return -EIO; + if (be->be_f_offset < lv->cowread) + return -EIO; + /* It looks like you might want to min this with lv->start, + * but you really don't. + */ + lv->inval = lv->inval + be->be_length; + lv->cowread = be->be_f_offset + be->be_length; + return 0; + } else + return -EIO; +} + +/* XDR decode pnfs_block_layout4 structure */ +int +nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo, + struct nfs4_layoutget_res *lgr, gfp_t gfp_flags) +{ + struct pnfs_block_layout *bl = BLK_LO2EXT(lo); + int i, status = -EIO; + uint32_t count; + struct pnfs_block_extent *be = NULL, *save; + struct xdr_stream stream; + struct xdr_buf buf; + struct page *scratch; + __be32 *p; + struct layout_verification lv = { + .mode = lgr->range.iomode, + .start = lgr->range.offset >> SECTOR_SHIFT, + .inval = lgr->range.offset >> SECTOR_SHIFT, + .cowread = lgr->range.offset >> SECTOR_SHIFT, + }; + LIST_HEAD(extents); + + dprintk("---> %s\n", __func__); + + scratch = alloc_page(gfp_flags); + if (!scratch) + return -ENOMEM; + + xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); + + p = xdr_inline_decode(&stream, 4); + if (unlikely(!p)) + goto out_err; + + count = be32_to_cpup(p++); + + dprintk("%s enter, number of extents %i\n", __func__, count); + p = xdr_inline_decode(&stream, (28 + NFS4_DEVICEID4_SIZE) * count); + if (unlikely(!p)) + goto out_err; + + /* Decode individual extents, putting them in temporary + * staging area until whole layout is decoded to make error + * recovery easier. + */ + for (i = 0; i < count; i++) { + be = bl_alloc_extent(); + if (!be) { + status = -ENOMEM; + goto out_err; + } + memcpy(&be->be_devid, p, NFS4_DEVICEID4_SIZE); + p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); + be->be_mdev = translate_devid(lo, &be->be_devid); + if (!be->be_mdev) + goto out_err; + + /* The next three values are read in as bytes, + * but stored as 512-byte sector lengths + */ + if (decode_sector_number(&p, &be->be_f_offset) < 0) + goto out_err; + if (decode_sector_number(&p, &be->be_length) < 0) + goto out_err; + if (decode_sector_number(&p, &be->be_v_offset) < 0) + goto out_err; + be->be_state = be32_to_cpup(p++); + if (be->be_state == PNFS_BLOCK_INVALID_DATA) + be->be_inval = &bl->bl_inval; + if (verify_extent(be, &lv)) { + dprintk("%s verify failed\n", __func__); + goto out_err; + } + list_add_tail(&be->be_node, &extents); + } + if (lgr->range.offset + lgr->range.length != + lv.start << SECTOR_SHIFT) { + dprintk("%s Final length mismatch\n", __func__); + be = NULL; + goto out_err; + } + if (lv.start < lv.cowread) { + dprintk("%s Final uncovered COW extent\n", __func__); + be = NULL; + goto out_err; + } + /* Extents decoded properly, now try to merge them in to + * existing layout extents. + */ + spin_lock(&bl->bl_ext_lock); + list_for_each_entry_safe(be, save, &extents, be_node) { + list_del(&be->be_node); + status = bl_add_merge_extent(bl, be); + if (status) { + spin_unlock(&bl->bl_ext_lock); + /* This is a fairly catastrophic error, as the + * entire layout extent lists are now corrupted. + * We should have some way to distinguish this. + */ + be = NULL; + goto out_err; + } + } + spin_unlock(&bl->bl_ext_lock); + status = 0; + out: + __free_page(scratch); + dprintk("%s returns %i\n", __func__, status); + return status; + + out_err: + bl_put_extent(be); + while (!list_empty(&extents)) { + be = list_first_entry(&extents, struct pnfs_block_extent, + be_node); + list_del(&be->be_node); + bl_put_extent(be); + } + goto out; +} diff --git a/fs/nfs/blocklayout/blocklayoutdm.c b/fs/nfs/blocklayout/blocklayoutdm.c new file mode 100644 index 00000000000..8999cfddd86 --- /dev/null +++ b/fs/nfs/blocklayout/blocklayoutdm.c @@ -0,0 +1,108 @@ +/* + * linux/fs/nfs/blocklayout/blocklayoutdm.c + * + * Module for the NFSv4.1 pNFS block layout driver. + * + * Copyright (c) 2007 The Regents of the University of Michigan. + * All rights reserved. + * + * Fred Isaman <iisaman@umich.edu> + * Andy Adamson <andros@citi.umich.edu> + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ + +#include <linux/genhd.h> /* gendisk - used in a dprintk*/ +#include <linux/sched.h> +#include <linux/hash.h> + +#include "blocklayout.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +static void dev_remove(struct net *net, dev_t dev) +{ + struct bl_pipe_msg bl_pipe_msg; + struct rpc_pipe_msg *msg = &bl_pipe_msg.msg; + struct bl_dev_msg bl_umount_request; + struct bl_msg_hdr bl_msg = { + .type = BL_DEVICE_UMOUNT, + .totallen = sizeof(bl_umount_request), + }; + uint8_t *dataptr; + DECLARE_WAITQUEUE(wq, current); + struct nfs_net *nn = net_generic(net, nfs_net_id); + + dprintk("Entering %s\n", __func__); + + bl_pipe_msg.bl_wq = &nn->bl_wq; + memset(msg, 0, sizeof(*msg)); + msg->len = sizeof(bl_msg) + bl_msg.totallen; + msg->data = kzalloc(msg->len, GFP_NOFS); + if (!msg->data) + goto out; + + memset(&bl_umount_request, 0, sizeof(bl_umount_request)); + bl_umount_request.major = MAJOR(dev); + bl_umount_request.minor = MINOR(dev); + + memcpy(msg->data, &bl_msg, sizeof(bl_msg)); + dataptr = (uint8_t *) msg->data; + memcpy(&dataptr[sizeof(bl_msg)], &bl_umount_request, sizeof(bl_umount_request)); + + add_wait_queue(&nn->bl_wq, &wq); + if (rpc_queue_upcall(nn->bl_device_pipe, msg) < 0) { + remove_wait_queue(&nn->bl_wq, &wq); + goto out; + } + + set_current_state(TASK_UNINTERRUPTIBLE); + schedule(); + __set_current_state(TASK_RUNNING); + remove_wait_queue(&nn->bl_wq, &wq); + +out: + kfree(msg->data); +} + +/* + * Release meta device + */ +static void nfs4_blk_metadev_release(struct pnfs_block_dev *bdev) +{ + dprintk("%s Releasing\n", __func__); + nfs4_blkdev_put(bdev->bm_mdev); + dev_remove(bdev->net, bdev->bm_mdev->bd_dev); +} + +void bl_free_block_dev(struct pnfs_block_dev *bdev) +{ + if (bdev) { + if (bdev->bm_mdev) { + dprintk("%s Removing DM device: %d:%d\n", + __func__, + MAJOR(bdev->bm_mdev->bd_dev), + MINOR(bdev->bm_mdev->bd_dev)); + nfs4_blk_metadev_release(bdev); + } + kfree(bdev); + } +} diff --git a/fs/nfs/blocklayout/extents.c b/fs/nfs/blocklayout/extents.c new file mode 100644 index 00000000000..4d016144256 --- /dev/null +++ b/fs/nfs/blocklayout/extents.c @@ -0,0 +1,908 @@ +/* + * linux/fs/nfs/blocklayout/blocklayout.h + * + * Module for the NFSv4.1 pNFS block layout driver. + * + * Copyright (c) 2006 The Regents of the University of Michigan. + * All rights reserved. + * + * Andy Adamson <andros@citi.umich.edu> + * Fred Isaman <iisaman@umich.edu> + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ + +#include "blocklayout.h" +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +/* Bit numbers */ +#define EXTENT_INITIALIZED 0 +#define EXTENT_WRITTEN 1 +#define EXTENT_IN_COMMIT 2 +#define INTERNAL_EXISTS MY_MAX_TAGS +#define INTERNAL_MASK ((1 << INTERNAL_EXISTS) - 1) + +/* Returns largest t<=s s.t. t%base==0 */ +static inline sector_t normalize(sector_t s, int base) +{ + sector_t tmp = s; /* Since do_div modifies its argument */ + return s - sector_div(tmp, base); +} + +static inline sector_t normalize_up(sector_t s, int base) +{ + return normalize(s + base - 1, base); +} + +/* Complete stub using list while determine API wanted */ + +/* Returns tags, or negative */ +static int32_t _find_entry(struct my_tree *tree, u64 s) +{ + struct pnfs_inval_tracking *pos; + + dprintk("%s(%llu) enter\n", __func__, s); + list_for_each_entry_reverse(pos, &tree->mtt_stub, it_link) { + if (pos->it_sector > s) + continue; + else if (pos->it_sector == s) + return pos->it_tags & INTERNAL_MASK; + else + break; + } + return -ENOENT; +} + +static inline +int _has_tag(struct my_tree *tree, u64 s, int32_t tag) +{ + int32_t tags; + + dprintk("%s(%llu, %i) enter\n", __func__, s, tag); + s = normalize(s, tree->mtt_step_size); + tags = _find_entry(tree, s); + if ((tags < 0) || !(tags & (1 << tag))) + return 0; + else + return 1; +} + +/* Creates entry with tag, or if entry already exists, unions tag to it. + * If storage is not NULL, newly created entry will use it. + * Returns number of entries added, or negative on error. + */ +static int _add_entry(struct my_tree *tree, u64 s, int32_t tag, + struct pnfs_inval_tracking *storage) +{ + int found = 0; + struct pnfs_inval_tracking *pos; + + dprintk("%s(%llu, %i, %p) enter\n", __func__, s, tag, storage); + list_for_each_entry_reverse(pos, &tree->mtt_stub, it_link) { + if (pos->it_sector > s) + continue; + else if (pos->it_sector == s) { + found = 1; + break; + } else + break; + } + if (found) { + pos->it_tags |= (1 << tag); + return 0; + } else { + struct pnfs_inval_tracking *new; + new = storage; + new->it_sector = s; + new->it_tags = (1 << tag); + list_add(&new->it_link, &pos->it_link); + return 1; + } +} + +/* XXXX Really want option to not create */ +/* Over range, unions tag with existing entries, else creates entry with tag */ +static int _set_range(struct my_tree *tree, int32_t tag, u64 s, u64 length) +{ + u64 i; + + dprintk("%s(%i, %llu, %llu) enter\n", __func__, tag, s, length); + for (i = normalize(s, tree->mtt_step_size); i < s + length; + i += tree->mtt_step_size) + if (_add_entry(tree, i, tag, NULL)) + return -ENOMEM; + return 0; +} + +/* Ensure that future operations on given range of tree will not malloc */ +static int _preload_range(struct pnfs_inval_markings *marks, + u64 offset, u64 length) +{ + u64 start, end, s; + int count, i, used = 0, status = -ENOMEM; + struct pnfs_inval_tracking **storage; + struct my_tree *tree = &marks->im_tree; + + dprintk("%s(%llu, %llu) enter\n", __func__, offset, length); + start = normalize(offset, tree->mtt_step_size); + end = normalize_up(offset + length, tree->mtt_step_size); + count = (int)(end - start) / (int)tree->mtt_step_size; + + /* Pre-malloc what memory we might need */ + storage = kcalloc(count, sizeof(*storage), GFP_NOFS); + if (!storage) + return -ENOMEM; + for (i = 0; i < count; i++) { + storage[i] = kmalloc(sizeof(struct pnfs_inval_tracking), + GFP_NOFS); + if (!storage[i]) + goto out_cleanup; + } + + spin_lock_bh(&marks->im_lock); + for (s = start; s < end; s += tree->mtt_step_size) + used += _add_entry(tree, s, INTERNAL_EXISTS, storage[used]); + spin_unlock_bh(&marks->im_lock); + + status = 0; + + out_cleanup: + for (i = used; i < count; i++) { + if (!storage[i]) + break; + kfree(storage[i]); + } + kfree(storage); + return status; +} + +/* We are relying on page lock to serialize this */ +int bl_is_sector_init(struct pnfs_inval_markings *marks, sector_t isect) +{ + int rv; + + spin_lock_bh(&marks->im_lock); + rv = _has_tag(&marks->im_tree, isect, EXTENT_INITIALIZED); + spin_unlock_bh(&marks->im_lock); + return rv; +} + +/* Assume start, end already sector aligned */ +static int +_range_has_tag(struct my_tree *tree, u64 start, u64 end, int32_t tag) +{ + struct pnfs_inval_tracking *pos; + u64 expect = 0; + + dprintk("%s(%llu, %llu, %i) enter\n", __func__, start, end, tag); + list_for_each_entry_reverse(pos, &tree->mtt_stub, it_link) { + if (pos->it_sector >= end) + continue; + if (!expect) { + if ((pos->it_sector == end - tree->mtt_step_size) && + (pos->it_tags & (1 << tag))) { + expect = pos->it_sector - tree->mtt_step_size; + if (pos->it_sector < tree->mtt_step_size || expect < start) + return 1; + continue; + } else { + return 0; + } + } + if (pos->it_sector != expect || !(pos->it_tags & (1 << tag))) + return 0; + expect -= tree->mtt_step_size; + if (expect < start) + return 1; + } + return 0; +} + +static int is_range_written(struct pnfs_inval_markings *marks, + sector_t start, sector_t end) +{ + int rv; + + spin_lock_bh(&marks->im_lock); + rv = _range_has_tag(&marks->im_tree, start, end, EXTENT_WRITTEN); + spin_unlock_bh(&marks->im_lock); + return rv; +} + +/* Marks sectors in [offest, offset_length) as having been initialized. + * All lengths are step-aligned, where step is min(pagesize, blocksize). + * Currently assumes offset is page-aligned + */ +int bl_mark_sectors_init(struct pnfs_inval_markings *marks, + sector_t offset, sector_t length) +{ + sector_t start, end; + + dprintk("%s(offset=%llu,len=%llu) enter\n", + __func__, (u64)offset, (u64)length); + + start = normalize(offset, marks->im_block_size); + end = normalize_up(offset + length, marks->im_block_size); + if (_preload_range(marks, start, end - start)) + goto outerr; + + spin_lock_bh(&marks->im_lock); + if (_set_range(&marks->im_tree, EXTENT_INITIALIZED, offset, length)) + goto out_unlock; + spin_unlock_bh(&marks->im_lock); + + return 0; + +out_unlock: + spin_unlock_bh(&marks->im_lock); +outerr: + return -ENOMEM; +} + +/* Marks sectors in [offest, offset+length) as having been written to disk. + * All lengths should be block aligned. + */ +static int mark_written_sectors(struct pnfs_inval_markings *marks, + sector_t offset, sector_t length) +{ + int status; + + dprintk("%s(offset=%llu,len=%llu) enter\n", __func__, + (u64)offset, (u64)length); + spin_lock_bh(&marks->im_lock); + status = _set_range(&marks->im_tree, EXTENT_WRITTEN, offset, length); + spin_unlock_bh(&marks->im_lock); + return status; +} + +static void print_short_extent(struct pnfs_block_short_extent *be) +{ + dprintk("PRINT SHORT EXTENT extent %p\n", be); + if (be) { + dprintk(" be_f_offset %llu\n", (u64)be->bse_f_offset); + dprintk(" be_length %llu\n", (u64)be->bse_length); + } +} + +static void print_clist(struct list_head *list, unsigned int count) +{ + struct pnfs_block_short_extent *be; + unsigned int i = 0; + + ifdebug(FACILITY) { + printk(KERN_DEBUG "****************\n"); + printk(KERN_DEBUG "Extent list looks like:\n"); + list_for_each_entry(be, list, bse_node) { + i++; + print_short_extent(be); + } + if (i != count) + printk(KERN_DEBUG "\n\nExpected %u entries\n\n\n", count); + printk(KERN_DEBUG "****************\n"); + } +} + +/* Note: In theory, we should do more checking that devid's match between + * old and new, but if they don't, the lists are too corrupt to salvage anyway. + */ +/* Note this is very similar to bl_add_merge_extent */ +static void add_to_commitlist(struct pnfs_block_layout *bl, + struct pnfs_block_short_extent *new) +{ + struct list_head *clist = &bl->bl_commit; + struct pnfs_block_short_extent *old, *save; + sector_t end = new->bse_f_offset + new->bse_length; + + dprintk("%s enter\n", __func__); + print_short_extent(new); + print_clist(clist, bl->bl_count); + bl->bl_count++; + /* Scan for proper place to insert, extending new to the left + * as much as possible. + */ + list_for_each_entry_safe(old, save, clist, bse_node) { + if (new->bse_f_offset < old->bse_f_offset) + break; + if (end <= old->bse_f_offset + old->bse_length) { + /* Range is already in list */ + bl->bl_count--; + kfree(new); + return; + } else if (new->bse_f_offset <= + old->bse_f_offset + old->bse_length) { + /* new overlaps or abuts existing be */ + if (new->bse_mdev == old->bse_mdev) { + /* extend new to fully replace old */ + new->bse_length += new->bse_f_offset - + old->bse_f_offset; + new->bse_f_offset = old->bse_f_offset; + list_del(&old->bse_node); + bl->bl_count--; + kfree(old); + } + } + } + /* Note that if we never hit the above break, old will not point to a + * valid extent. However, in that case &old->bse_node==list. + */ + list_add_tail(&new->bse_node, &old->bse_node); + /* Scan forward for overlaps. If we find any, extend new and + * remove the overlapped extent. + */ + old = list_prepare_entry(new, clist, bse_node); + list_for_each_entry_safe_continue(old, save, clist, bse_node) { + if (end < old->bse_f_offset) + break; + /* new overlaps or abuts old */ + if (new->bse_mdev == old->bse_mdev) { + if (end < old->bse_f_offset + old->bse_length) { + /* extend new to fully cover old */ + end = old->bse_f_offset + old->bse_length; + new->bse_length = end - new->bse_f_offset; + } + list_del(&old->bse_node); + bl->bl_count--; + kfree(old); + } + } + dprintk("%s: after merging\n", __func__); + print_clist(clist, bl->bl_count); +} + +/* Note the range described by offset, length is guaranteed to be contained + * within be. + * new will be freed, either by this function or add_to_commitlist if they + * decide not to use it, or after LAYOUTCOMMIT uses it in the commitlist. + */ +int bl_mark_for_commit(struct pnfs_block_extent *be, + sector_t offset, sector_t length, + struct pnfs_block_short_extent *new) +{ + sector_t new_end, end = offset + length; + struct pnfs_block_layout *bl = container_of(be->be_inval, + struct pnfs_block_layout, + bl_inval); + + mark_written_sectors(be->be_inval, offset, length); + /* We want to add the range to commit list, but it must be + * block-normalized, and verified that the normalized range has + * been entirely written to disk. + */ + new->bse_f_offset = offset; + offset = normalize(offset, bl->bl_blocksize); + if (offset < new->bse_f_offset) { + if (is_range_written(be->be_inval, offset, new->bse_f_offset)) + new->bse_f_offset = offset; + else + new->bse_f_offset = offset + bl->bl_blocksize; + } + new_end = normalize_up(end, bl->bl_blocksize); + if (end < new_end) { + if (is_range_written(be->be_inval, end, new_end)) + end = new_end; + else + end = new_end - bl->bl_blocksize; + } + if (end <= new->bse_f_offset) { + kfree(new); + return 0; + } + new->bse_length = end - new->bse_f_offset; + new->bse_devid = be->be_devid; + new->bse_mdev = be->be_mdev; + + spin_lock(&bl->bl_ext_lock); + add_to_commitlist(bl, new); + spin_unlock(&bl->bl_ext_lock); + return 0; +} + +static void print_bl_extent(struct pnfs_block_extent *be) +{ + dprintk("PRINT EXTENT extent %p\n", be); + if (be) { + dprintk(" be_f_offset %llu\n", (u64)be->be_f_offset); + dprintk(" be_length %llu\n", (u64)be->be_length); + dprintk(" be_v_offset %llu\n", (u64)be->be_v_offset); + dprintk(" be_state %d\n", be->be_state); + } +} + +static void +destroy_extent(struct kref *kref) +{ + struct pnfs_block_extent *be; + + be = container_of(kref, struct pnfs_block_extent, be_refcnt); + dprintk("%s be=%p\n", __func__, be); + kfree(be); +} + +void +bl_put_extent(struct pnfs_block_extent *be) +{ + if (be) { + dprintk("%s enter %p (%i)\n", __func__, be, + atomic_read(&be->be_refcnt.refcount)); + kref_put(&be->be_refcnt, destroy_extent); + } +} + +struct pnfs_block_extent *bl_alloc_extent(void) +{ + struct pnfs_block_extent *be; + + be = kmalloc(sizeof(struct pnfs_block_extent), GFP_NOFS); + if (!be) + return NULL; + INIT_LIST_HEAD(&be->be_node); + kref_init(&be->be_refcnt); + be->be_inval = NULL; + return be; +} + +static void print_elist(struct list_head *list) +{ + struct pnfs_block_extent *be; + dprintk("****************\n"); + dprintk("Extent list looks like:\n"); + list_for_each_entry(be, list, be_node) { + print_bl_extent(be); + } + dprintk("****************\n"); +} + +static inline int +extents_consistent(struct pnfs_block_extent *old, struct pnfs_block_extent *new) +{ + /* Note this assumes new->be_f_offset >= old->be_f_offset */ + return (new->be_state == old->be_state) && + ((new->be_state == PNFS_BLOCK_NONE_DATA) || + ((new->be_v_offset - old->be_v_offset == + new->be_f_offset - old->be_f_offset) && + new->be_mdev == old->be_mdev)); +} + +/* Adds new to appropriate list in bl, modifying new and removing existing + * extents as appropriate to deal with overlaps. + * + * See bl_find_get_extent for list constraints. + * + * Refcount on new is already set. If end up not using it, or error out, + * need to put the reference. + * + * bl->bl_ext_lock is held by caller. + */ +int +bl_add_merge_extent(struct pnfs_block_layout *bl, + struct pnfs_block_extent *new) +{ + struct pnfs_block_extent *be, *tmp; + sector_t end = new->be_f_offset + new->be_length; + struct list_head *list; + + dprintk("%s enter with be=%p\n", __func__, new); + print_bl_extent(new); + list = &bl->bl_extents[bl_choose_list(new->be_state)]; + print_elist(list); + + /* Scan for proper place to insert, extending new to the left + * as much as possible. + */ + list_for_each_entry_safe_reverse(be, tmp, list, be_node) { + if (new->be_f_offset >= be->be_f_offset + be->be_length) + break; + if (new->be_f_offset >= be->be_f_offset) { + if (end <= be->be_f_offset + be->be_length) { + /* new is a subset of existing be*/ + if (extents_consistent(be, new)) { + dprintk("%s: new is subset, ignoring\n", + __func__); + bl_put_extent(new); + return 0; + } else { + goto out_err; + } + } else { + /* |<-- be -->| + * |<-- new -->| */ + if (extents_consistent(be, new)) { + /* extend new to fully replace be */ + new->be_length += new->be_f_offset - + be->be_f_offset; + new->be_f_offset = be->be_f_offset; + new->be_v_offset = be->be_v_offset; + dprintk("%s: removing %p\n", __func__, be); + list_del(&be->be_node); + bl_put_extent(be); + } else { + goto out_err; + } + } + } else if (end >= be->be_f_offset + be->be_length) { + /* new extent overlap existing be */ + if (extents_consistent(be, new)) { + /* extend new to fully replace be */ + dprintk("%s: removing %p\n", __func__, be); + list_del(&be->be_node); + bl_put_extent(be); + } else { + goto out_err; + } + } else if (end > be->be_f_offset) { + /* |<-- be -->| + *|<-- new -->| */ + if (extents_consistent(new, be)) { + /* extend new to fully replace be */ + new->be_length += be->be_f_offset + be->be_length - + new->be_f_offset - new->be_length; + dprintk("%s: removing %p\n", __func__, be); + list_del(&be->be_node); + bl_put_extent(be); + } else { + goto out_err; + } + } + } + /* Note that if we never hit the above break, be will not point to a + * valid extent. However, in that case &be->be_node==list. + */ + list_add(&new->be_node, &be->be_node); + dprintk("%s: inserting new\n", __func__); + print_elist(list); + /* FIXME - The per-list consistency checks have all been done, + * should now check cross-list consistency. + */ + return 0; + + out_err: + bl_put_extent(new); + return -EIO; +} + +/* Returns extent, or NULL. If a second READ extent exists, it is returned + * in cow_read, if given. + * + * The extents are kept in two seperate ordered lists, one for READ and NONE, + * one for READWRITE and INVALID. Within each list, we assume: + * 1. Extents are ordered by file offset. + * 2. For any given isect, there is at most one extents that matches. + */ +struct pnfs_block_extent * +bl_find_get_extent(struct pnfs_block_layout *bl, sector_t isect, + struct pnfs_block_extent **cow_read) +{ + struct pnfs_block_extent *be, *cow, *ret; + int i; + + dprintk("%s enter with isect %llu\n", __func__, (u64)isect); + cow = ret = NULL; + spin_lock(&bl->bl_ext_lock); + for (i = 0; i < EXTENT_LISTS; i++) { + list_for_each_entry_reverse(be, &bl->bl_extents[i], be_node) { + if (isect >= be->be_f_offset + be->be_length) + break; + if (isect >= be->be_f_offset) { + /* We have found an extent */ + dprintk("%s Get %p (%i)\n", __func__, be, + atomic_read(&be->be_refcnt.refcount)); + kref_get(&be->be_refcnt); + if (!ret) + ret = be; + else if (be->be_state != PNFS_BLOCK_READ_DATA) + bl_put_extent(be); + else + cow = be; + break; + } + } + if (ret && + (!cow_read || ret->be_state != PNFS_BLOCK_INVALID_DATA)) + break; + } + spin_unlock(&bl->bl_ext_lock); + if (cow_read) + *cow_read = cow; + print_bl_extent(ret); + return ret; +} + +/* Similar to bl_find_get_extent, but called with lock held, and ignores cow */ +static struct pnfs_block_extent * +bl_find_get_extent_locked(struct pnfs_block_layout *bl, sector_t isect) +{ + struct pnfs_block_extent *be, *ret = NULL; + int i; + + dprintk("%s enter with isect %llu\n", __func__, (u64)isect); + for (i = 0; i < EXTENT_LISTS; i++) { + if (ret) + break; + list_for_each_entry_reverse(be, &bl->bl_extents[i], be_node) { + if (isect >= be->be_f_offset + be->be_length) + break; + if (isect >= be->be_f_offset) { + /* We have found an extent */ + dprintk("%s Get %p (%i)\n", __func__, be, + atomic_read(&be->be_refcnt.refcount)); + kref_get(&be->be_refcnt); + ret = be; + break; + } + } + } + print_bl_extent(ret); + return ret; +} + +int +encode_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, + struct xdr_stream *xdr, + const struct nfs4_layoutcommit_args *arg) +{ + struct pnfs_block_short_extent *lce, *save; + unsigned int count = 0; + __be32 *p, *xdr_start; + + dprintk("%s enter\n", __func__); + /* BUG - creation of bl_commit is buggy - need to wait for + * entire block to be marked WRITTEN before it can be added. + */ + spin_lock(&bl->bl_ext_lock); + /* Want to adjust for possible truncate */ + /* We now want to adjust argument range */ + + /* XDR encode the ranges found */ + xdr_start = xdr_reserve_space(xdr, 8); + if (!xdr_start) + goto out; + list_for_each_entry_safe(lce, save, &bl->bl_commit, bse_node) { + p = xdr_reserve_space(xdr, 7 * 4 + sizeof(lce->bse_devid.data)); + if (!p) + break; + p = xdr_encode_opaque_fixed(p, lce->bse_devid.data, NFS4_DEVICEID4_SIZE); + p = xdr_encode_hyper(p, lce->bse_f_offset << SECTOR_SHIFT); + p = xdr_encode_hyper(p, lce->bse_length << SECTOR_SHIFT); + p = xdr_encode_hyper(p, 0LL); + *p++ = cpu_to_be32(PNFS_BLOCK_READWRITE_DATA); + list_move_tail(&lce->bse_node, &bl->bl_committing); + bl->bl_count--; + count++; + } + xdr_start[0] = cpu_to_be32((xdr->p - xdr_start - 1) * 4); + xdr_start[1] = cpu_to_be32(count); +out: + spin_unlock(&bl->bl_ext_lock); + dprintk("%s found %i ranges\n", __func__, count); + return 0; +} + +/* Helper function to set_to_rw that initialize a new extent */ +static void +_prep_new_extent(struct pnfs_block_extent *new, + struct pnfs_block_extent *orig, + sector_t offset, sector_t length, int state) +{ + kref_init(&new->be_refcnt); + /* don't need to INIT_LIST_HEAD(&new->be_node) */ + memcpy(&new->be_devid, &orig->be_devid, sizeof(struct nfs4_deviceid)); + new->be_mdev = orig->be_mdev; + new->be_f_offset = offset; + new->be_length = length; + new->be_v_offset = orig->be_v_offset - orig->be_f_offset + offset; + new->be_state = state; + new->be_inval = orig->be_inval; +} + +/* Tries to merge be with extent in front of it in list. + * Frees storage if not used. + */ +static struct pnfs_block_extent * +_front_merge(struct pnfs_block_extent *be, struct list_head *head, + struct pnfs_block_extent *storage) +{ + struct pnfs_block_extent *prev; + + if (!storage) + goto no_merge; + if (&be->be_node == head || be->be_node.prev == head) + goto no_merge; + prev = list_entry(be->be_node.prev, struct pnfs_block_extent, be_node); + if ((prev->be_f_offset + prev->be_length != be->be_f_offset) || + !extents_consistent(prev, be)) + goto no_merge; + _prep_new_extent(storage, prev, prev->be_f_offset, + prev->be_length + be->be_length, prev->be_state); + list_replace(&prev->be_node, &storage->be_node); + bl_put_extent(prev); + list_del(&be->be_node); + bl_put_extent(be); + return storage; + + no_merge: + kfree(storage); + return be; +} + +static u64 +set_to_rw(struct pnfs_block_layout *bl, u64 offset, u64 length) +{ + u64 rv = offset + length; + struct pnfs_block_extent *be, *e1, *e2, *e3, *new, *old; + struct pnfs_block_extent *children[3]; + struct pnfs_block_extent *merge1 = NULL, *merge2 = NULL; + int i = 0, j; + + dprintk("%s(%llu, %llu)\n", __func__, offset, length); + /* Create storage for up to three new extents e1, e2, e3 */ + e1 = kmalloc(sizeof(*e1), GFP_ATOMIC); + e2 = kmalloc(sizeof(*e2), GFP_ATOMIC); + e3 = kmalloc(sizeof(*e3), GFP_ATOMIC); + /* BUG - we are ignoring any failure */ + if (!e1 || !e2 || !e3) + goto out_nosplit; + + spin_lock(&bl->bl_ext_lock); + be = bl_find_get_extent_locked(bl, offset); + rv = be->be_f_offset + be->be_length; + if (be->be_state != PNFS_BLOCK_INVALID_DATA) { + spin_unlock(&bl->bl_ext_lock); + goto out_nosplit; + } + /* Add e* to children, bumping e*'s krefs */ + if (be->be_f_offset != offset) { + _prep_new_extent(e1, be, be->be_f_offset, + offset - be->be_f_offset, + PNFS_BLOCK_INVALID_DATA); + children[i++] = e1; + print_bl_extent(e1); + } else + merge1 = e1; + _prep_new_extent(e2, be, offset, + min(length, be->be_f_offset + be->be_length - offset), + PNFS_BLOCK_READWRITE_DATA); + children[i++] = e2; + print_bl_extent(e2); + if (offset + length < be->be_f_offset + be->be_length) { + _prep_new_extent(e3, be, e2->be_f_offset + e2->be_length, + be->be_f_offset + be->be_length - + offset - length, + PNFS_BLOCK_INVALID_DATA); + children[i++] = e3; + print_bl_extent(e3); + } else + merge2 = e3; + + /* Remove be from list, and insert the e* */ + /* We don't get refs on e*, since this list is the base reference + * set when init'ed. + */ + if (i < 3) + children[i] = NULL; + new = children[0]; + list_replace(&be->be_node, &new->be_node); + bl_put_extent(be); + new = _front_merge(new, &bl->bl_extents[RW_EXTENT], merge1); + for (j = 1; j < i; j++) { + old = new; + new = children[j]; + list_add(&new->be_node, &old->be_node); + } + if (merge2) { + /* This is a HACK, should just create a _back_merge function */ + new = list_entry(new->be_node.next, + struct pnfs_block_extent, be_node); + new = _front_merge(new, &bl->bl_extents[RW_EXTENT], merge2); + } + spin_unlock(&bl->bl_ext_lock); + + /* Since we removed the base reference above, be is now scheduled for + * destruction. + */ + bl_put_extent(be); + dprintk("%s returns %llu after split\n", __func__, rv); + return rv; + + out_nosplit: + kfree(e1); + kfree(e2); + kfree(e3); + dprintk("%s returns %llu without splitting\n", __func__, rv); + return rv; +} + +void +clean_pnfs_block_layoutupdate(struct pnfs_block_layout *bl, + const struct nfs4_layoutcommit_args *arg, + int status) +{ + struct pnfs_block_short_extent *lce, *save; + + dprintk("%s status %d\n", __func__, status); + list_for_each_entry_safe(lce, save, &bl->bl_committing, bse_node) { + if (likely(!status)) { + u64 offset = lce->bse_f_offset; + u64 end = offset + lce->bse_length; + + do { + offset = set_to_rw(bl, offset, end - offset); + } while (offset < end); + list_del(&lce->bse_node); + + kfree(lce); + } else { + list_del(&lce->bse_node); + spin_lock(&bl->bl_ext_lock); + add_to_commitlist(bl, lce); + spin_unlock(&bl->bl_ext_lock); + } + } +} + +int bl_push_one_short_extent(struct pnfs_inval_markings *marks) +{ + struct pnfs_block_short_extent *new; + + new = kmalloc(sizeof(*new), GFP_NOFS); + if (unlikely(!new)) + return -ENOMEM; + + spin_lock_bh(&marks->im_lock); + list_add(&new->bse_node, &marks->im_extents); + spin_unlock_bh(&marks->im_lock); + + return 0; +} + +struct pnfs_block_short_extent * +bl_pop_one_short_extent(struct pnfs_inval_markings *marks) +{ + struct pnfs_block_short_extent *rv = NULL; + + spin_lock_bh(&marks->im_lock); + if (!list_empty(&marks->im_extents)) { + rv = list_entry((&marks->im_extents)->next, + struct pnfs_block_short_extent, bse_node); + list_del_init(&rv->bse_node); + } + spin_unlock_bh(&marks->im_lock); + + return rv; +} + +void bl_free_short_extents(struct pnfs_inval_markings *marks, int num_to_free) +{ + struct pnfs_block_short_extent *se = NULL, *tmp; + + if (num_to_free <= 0) + return; + + spin_lock(&marks->im_lock); + list_for_each_entry_safe(se, tmp, &marks->im_extents, bse_node) { + list_del(&se->bse_node); + kfree(se); + if (--num_to_free == 0) + break; + } + spin_unlock(&marks->im_lock); + + BUG_ON(num_to_free > 0); +} diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c index 84690319e62..5f7b053720e 100644 --- a/fs/nfs/cache_lib.c +++ b/fs/nfs/cache_lib.c @@ -13,6 +13,7 @@ #include <linux/slab.h> #include <linux/sunrpc/cache.h> #include <linux/sunrpc/rpc_pipe_fs.h> +#include <net/net_namespace.h> #include "cache_lib.h" @@ -111,31 +112,47 @@ int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq) return 0; } -int nfs_cache_register(struct cache_detail *cd) +int nfs_cache_register_sb(struct super_block *sb, struct cache_detail *cd) { - struct nameidata nd; - struct vfsmount *mnt; int ret; + struct dentry *dir; - mnt = rpc_get_mount(); - if (IS_ERR(mnt)) - return PTR_ERR(mnt); - ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &nd); - if (ret) - goto err; - ret = sunrpc_cache_register_pipefs(nd.path.dentry, - cd->name, 0600, cd); - path_put(&nd.path); - if (!ret) - return ret; -err: - rpc_put_mount(); + dir = rpc_d_lookup_sb(sb, "cache"); + ret = sunrpc_cache_register_pipefs(dir, cd->name, 0600, cd); + dput(dir); return ret; } -void nfs_cache_unregister(struct cache_detail *cd) +int nfs_cache_register_net(struct net *net, struct cache_detail *cd) { - sunrpc_cache_unregister_pipefs(cd); - rpc_put_mount(); + struct super_block *pipefs_sb; + int ret = 0; + + sunrpc_init_cache_detail(cd); + pipefs_sb = rpc_get_sb_net(net); + if (pipefs_sb) { + ret = nfs_cache_register_sb(pipefs_sb, cd); + rpc_put_sb_net(net); + if (ret) + sunrpc_destroy_cache_detail(cd); + } + return ret; +} + +void nfs_cache_unregister_sb(struct super_block *sb, struct cache_detail *cd) +{ + if (cd->u.pipefs.dir) + sunrpc_cache_unregister_pipefs(cd); } +void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd) +{ + struct super_block *pipefs_sb; + + pipefs_sb = rpc_get_sb_net(net); + if (pipefs_sb) { + nfs_cache_unregister_sb(pipefs_sb, cd); + rpc_put_sb_net(net); + } + sunrpc_destroy_cache_detail(cd); +} diff --git a/fs/nfs/cache_lib.h b/fs/nfs/cache_lib.h index 76f856e284e..4116d2c3f52 100644 --- a/fs/nfs/cache_lib.h +++ b/fs/nfs/cache_lib.h @@ -6,7 +6,7 @@ #include <linux/completion.h> #include <linux/sunrpc/cache.h> -#include <asm/atomic.h> +#include <linux/atomic.h> /* * Deferred request handling @@ -23,5 +23,9 @@ extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void); extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq); extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq); -extern int nfs_cache_register(struct cache_detail *cd); -extern void nfs_cache_unregister(struct cache_detail *cd); +extern int nfs_cache_register_net(struct net *net, struct cache_detail *cd); +extern void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd); +extern int nfs_cache_register_sb(struct super_block *sb, + struct cache_detail *cd); +extern void nfs_cache_unregister_sb(struct super_block *sb, + struct cache_detail *cd); diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index aeec017fe81..073b4cf67ed 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -9,23 +9,22 @@ #include <linux/completion.h> #include <linux/ip.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <linux/sunrpc/svc.h> #include <linux/sunrpc/svcsock.h> #include <linux/nfs_fs.h> +#include <linux/errno.h> #include <linux/mutex.h> #include <linux/freezer.h> #include <linux/kthread.h> #include <linux/sunrpc/svcauth_gss.h> -#if defined(CONFIG_NFS_V4_1) #include <linux/sunrpc/bc_xprt.h> -#endif #include <net/inet_sock.h> #include "nfs4_fs.h" #include "callback.h" #include "internal.h" +#include "netns.h" #define NFSDBG_FACILITY NFSDBG_CALLBACK @@ -40,31 +39,32 @@ static struct nfs_callback_data nfs_callback_info[NFS4_MAX_MINOR_VERSION + 1]; static DEFINE_MUTEX(nfs_callback_mutex); static struct svc_program nfs4_callback_program; -unsigned int nfs_callback_set_tcpport; -unsigned short nfs_callback_tcpport; -unsigned short nfs_callback_tcpport6; -#define NFS_CALLBACK_MAXPORTNR (65535U) - -static int param_set_portnr(const char *val, const struct kernel_param *kp) +static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net) { - unsigned long num; int ret; + struct nfs_net *nn = net_generic(net, nfs_net_id); + + ret = svc_create_xprt(serv, "tcp", net, PF_INET, + nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS); + if (ret <= 0) + goto out_err; + nn->nfs_callback_tcpport = ret; + dprintk("NFS: Callback listener port = %u (af %u, net %p)\n", + nn->nfs_callback_tcpport, PF_INET, net); - if (!val) - return -EINVAL; - ret = strict_strtoul(val, 0, &num); - if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR) - return -EINVAL; - *((unsigned int *)kp->arg) = num; + ret = svc_create_xprt(serv, "tcp", net, PF_INET6, + nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS); + if (ret > 0) { + nn->nfs_callback_tcpport6 = ret; + dprintk("NFS: Callback listener port = %u (af %u, net %p)\n", + nn->nfs_callback_tcpport6, PF_INET6, net); + } else if (ret != -EAFNOSUPPORT) + goto out_err; return 0; -} -static struct kernel_param_ops param_ops_portnr = { - .set = param_set_portnr, - .get = param_get_uint, -}; -#define param_check_portnr(name, p) __param_check(name, p, unsigned int); -module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); +out_err: + return (ret) ? ret : -ENOMEM; +} /* * This is the NFSv4 callback kernel thread. @@ -72,7 +72,7 @@ module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); static int nfs4_callback_svc(void *vrqstp) { - int err, preverr = 0; + int err; struct svc_rqst *rqstp = vrqstp; set_freezable(); @@ -82,20 +82,8 @@ nfs4_callback_svc(void *vrqstp) * Listen for a request on the socket */ err = svc_recv(rqstp, MAX_SCHEDULE_TIMEOUT); - if (err == -EAGAIN || err == -EINTR) { - preverr = err; - continue; - } - if (err < 0) { - if (err != preverr) { - printk(KERN_WARNING "%s: unexpected error " - "from svc_recv (%d)\n", __func__, err); - preverr = err; - } - schedule_timeout_uninterruptible(HZ); + if (err == -EAGAIN || err == -EINTR) continue; - } - preverr = err; svc_process(rqstp); } return 0; @@ -104,39 +92,24 @@ nfs4_callback_svc(void *vrqstp) /* * Prepare to bring up the NFSv4 callback service */ -struct svc_rqst * +static struct svc_rqst * nfs4_callback_up(struct svc_serv *serv) { - int ret; - - ret = svc_create_xprt(serv, "tcp", &init_net, PF_INET, - nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS); - if (ret <= 0) - goto out_err; - nfs_callback_tcpport = ret; - dprintk("NFS: Callback listener port = %u (af %u)\n", - nfs_callback_tcpport, PF_INET); - - ret = svc_create_xprt(serv, "tcp", &init_net, PF_INET6, - nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS); - if (ret > 0) { - nfs_callback_tcpport6 = ret; - dprintk("NFS: Callback listener port = %u (af %u)\n", - nfs_callback_tcpport6, PF_INET6); - } else if (ret == -EAFNOSUPPORT) - ret = 0; - else - goto out_err; - - return svc_prepare_thread(serv, &serv->sv_pools[0]); - -out_err: - if (ret == 0) - ret = -ENOMEM; - return ERR_PTR(ret); + return svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); } #if defined(CONFIG_NFS_V4_1) +static int nfs41_callback_up_net(struct svc_serv *serv, struct net *net) +{ + /* + * Create an svc_sock for the back channel service that shares the + * fore channel connection. + * Returns the input port (0) and sets the svc_serv bc_xprt on success + */ + return svc_create_xprt(serv, "tcp-bc", net, PF_INET, 0, + SVC_SOCK_ANONYMOUS); +} + /* * The callback service for NFSv4.1 callbacks */ @@ -152,6 +125,9 @@ nfs41_callback_svc(void *vrqstp) set_freezable(); while (!kthread_should_stop()) { + if (try_to_freeze()) + continue; + prepare_to_wait(&serv->sv_cb_waitq, &wq, TASK_INTERRUPTIBLE); spin_lock_bh(&serv->sv_cb_lock); if (!list_empty(&serv->sv_cb_list)) { @@ -175,147 +151,257 @@ nfs41_callback_svc(void *vrqstp) /* * Bring up the NFSv4.1 callback service */ -struct svc_rqst * -nfs41_callback_up(struct svc_serv *serv, struct rpc_xprt *xprt) +static struct svc_rqst * +nfs41_callback_up(struct svc_serv *serv) { - struct svc_xprt *bc_xprt; - struct svc_rqst *rqstp = ERR_PTR(-ENOMEM); - - dprintk("--> %s\n", __func__); - /* Create a svc_sock for the service */ - bc_xprt = svc_sock_create(serv, xprt->prot); - if (!bc_xprt) - goto out; - - /* - * Save the svc_serv in the transport so that it can - * be referenced when the session backchannel is initialized - */ - serv->bc_xprt = bc_xprt; - xprt->bc_serv = serv; + struct svc_rqst *rqstp; INIT_LIST_HEAD(&serv->sv_cb_list); spin_lock_init(&serv->sv_cb_lock); init_waitqueue_head(&serv->sv_cb_waitq); - rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]); - if (IS_ERR(rqstp)) - svc_sock_destroy(bc_xprt); -out: - dprintk("--> %s return %p\n", __func__, rqstp); + rqstp = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE); + if (IS_ERR(rqstp)) { + svc_xprt_put(serv->sv_bc_xprt); + serv->sv_bc_xprt = NULL; + } + dprintk("--> %s return %d\n", __func__, PTR_ERR_OR_ZERO(rqstp)); return rqstp; } -static inline int nfs_minorversion_callback_svc_setup(u32 minorversion, - struct svc_serv *serv, struct rpc_xprt *xprt, +static void nfs_minorversion_callback_svc_setup(struct svc_serv *serv, struct svc_rqst **rqstpp, int (**callback_svc)(void *vrqstp)) { - if (minorversion) { - *rqstpp = nfs41_callback_up(serv, xprt); - *callback_svc = nfs41_callback_svc; - } - return minorversion; + *rqstpp = nfs41_callback_up(serv); + *callback_svc = nfs41_callback_svc; } static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, - struct nfs_callback_data *cb_info) + struct svc_serv *serv) { if (minorversion) - xprt->bc_serv = cb_info->serv; + /* + * Save the svc_serv in the transport so that it can + * be referenced when the session backchannel is initialized + */ + xprt->bc_serv = serv; } #else -static inline int nfs_minorversion_callback_svc_setup(u32 minorversion, - struct svc_serv *serv, struct rpc_xprt *xprt, - struct svc_rqst **rqstpp, int (**callback_svc)(void *vrqstp)) +static int nfs41_callback_up_net(struct svc_serv *serv, struct net *net) { return 0; } +static void nfs_minorversion_callback_svc_setup(struct svc_serv *serv, + struct svc_rqst **rqstpp, int (**callback_svc)(void *vrqstp)) +{ + *rqstpp = ERR_PTR(-ENOTSUPP); + *callback_svc = ERR_PTR(-ENOTSUPP); +} + static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, - struct nfs_callback_data *cb_info) + struct svc_serv *serv) { } #endif /* CONFIG_NFS_V4_1 */ -/* - * Bring up the callback thread if it is not already up. - */ -int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt) +static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, + struct svc_serv *serv) { - struct svc_serv *serv = NULL; struct svc_rqst *rqstp; int (*callback_svc)(void *vrqstp); struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; - char svc_name[12]; - int ret = 0; - int minorversion_setup; + int ret; - mutex_lock(&nfs_callback_mutex); - if (cb_info->users++ || cb_info->task != NULL) { - nfs_callback_bc_serv(minorversion, xprt, cb_info); - goto out; - } - serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL); - if (!serv) { - ret = -ENOMEM; - goto out_err; - } + nfs_callback_bc_serv(minorversion, xprt, serv); + + if (cb_info->task) + return 0; - minorversion_setup = nfs_minorversion_callback_svc_setup(minorversion, - serv, xprt, &rqstp, &callback_svc); - if (!minorversion_setup) { + switch (minorversion) { + case 0: /* v4.0 callback setup */ rqstp = nfs4_callback_up(serv); callback_svc = nfs4_callback_svc; + break; + default: + nfs_minorversion_callback_svc_setup(serv, + &rqstp, &callback_svc); } - if (IS_ERR(rqstp)) { - ret = PTR_ERR(rqstp); - goto out_err; - } + if (IS_ERR(rqstp)) + return PTR_ERR(rqstp); svc_sock_update_bufs(serv); - sprintf(svc_name, "nfsv4.%u-svc", minorversion); cb_info->serv = serv; cb_info->rqst = rqstp; - cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name); + cb_info->task = kthread_run(callback_svc, cb_info->rqst, + "nfsv4.%u-svc", minorversion); if (IS_ERR(cb_info->task)) { ret = PTR_ERR(cb_info->task); svc_exit_thread(cb_info->rqst); cb_info->rqst = NULL; cb_info->task = NULL; - goto out_err; + return ret; } -out: + dprintk("nfs_callback_up: service started\n"); + return 0; +} + +static void nfs_callback_down_net(u32 minorversion, struct svc_serv *serv, struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + + if (--nn->cb_users[minorversion]) + return; + + dprintk("NFS: destroy per-net callback data; net=%p\n", net); + svc_shutdown_net(serv, net); +} + +static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + int ret; + + if (nn->cb_users[minorversion]++) + return 0; + + dprintk("NFS: create per-net callback data; net=%p\n", net); + + ret = svc_bind(serv, net); + if (ret < 0) { + printk(KERN_WARNING "NFS: bind callback service failed\n"); + goto err_bind; + } + + switch (minorversion) { + case 0: + ret = nfs4_callback_up_net(serv, net); + break; + case 1: + case 2: + ret = nfs41_callback_up_net(serv, net); + break; + default: + printk(KERN_ERR "NFS: unknown callback version: %d\n", + minorversion); + ret = -EINVAL; + break; + } + + if (ret < 0) { + printk(KERN_ERR "NFS: callback service start failed\n"); + goto err_socks; + } + return 0; + +err_socks: + svc_rpcb_cleanup(serv, net); +err_bind: + dprintk("NFS: Couldn't create callback socket: err = %d; " + "net = %p\n", ret, net); + return ret; +} + +static struct svc_serv *nfs_callback_create_svc(int minorversion) +{ + struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; + struct svc_serv *serv; + + /* + * Check whether we're already up and running. + */ + if (cb_info->task) { + /* + * Note: increase service usage, because later in case of error + * svc_destroy() will be called. + */ + svc_get(cb_info->serv); + return cb_info->serv; + } + + /* + * Sanity check: if there's no task, + * we should be the first user ... + */ + if (cb_info->users) + printk(KERN_WARNING "nfs_callback_create_svc: no kthread, %d users??\n", + cb_info->users); + + serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL); + if (!serv) { + printk(KERN_ERR "nfs_callback_create_svc: create service failed\n"); + return ERR_PTR(-ENOMEM); + } + /* As there is only one thread we need to over-ride the + * default maximum of 80 connections + */ + serv->sv_maxconn = 1024; + dprintk("nfs_callback_create_svc: service created\n"); + return serv; +} + +/* + * Bring up the callback thread if it is not already up. + */ +int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt) +{ + struct svc_serv *serv; + struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; + int ret; + struct net *net = xprt->xprt_net; + + mutex_lock(&nfs_callback_mutex); + + serv = nfs_callback_create_svc(minorversion); + if (IS_ERR(serv)) { + ret = PTR_ERR(serv); + goto err_create; + } + + ret = nfs_callback_up_net(minorversion, serv, net); + if (ret < 0) + goto err_net; + + ret = nfs_callback_start_svc(minorversion, xprt, serv); + if (ret < 0) + goto err_start; + + cb_info->users++; /* * svc_create creates the svc_serv with sv_nrthreads == 1, and then * svc_prepare_thread increments that. So we need to call svc_destroy * on both success and failure so that the refcount is 1 when the * thread exits. */ - if (serv) - svc_destroy(serv); +err_net: + svc_destroy(serv); +err_create: mutex_unlock(&nfs_callback_mutex); return ret; -out_err: - dprintk("NFS: Couldn't create callback socket or server thread; " - "err = %d\n", ret); - cb_info->users--; - goto out; + +err_start: + nfs_callback_down_net(minorversion, serv, net); + dprintk("NFS: Couldn't create server thread; err = %d\n", ret); + goto err_net; } /* * Kill the callback thread if it's no longer being used. */ -void nfs_callback_down(int minorversion) +void nfs_callback_down(int minorversion, struct net *net) { struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; mutex_lock(&nfs_callback_mutex); + nfs_callback_down_net(minorversion, cb_info->serv, net); cb_info->users--; if (cb_info->users == 0 && cb_info->task != NULL) { kthread_stop(cb_info->task); + dprintk("nfs_callback_down: service stopped\n"); svc_exit_thread(cb_info->rqst); + dprintk("nfs_callback_down: service destroyed\n"); cb_info->serv = NULL; cb_info->rqst = NULL; cb_info->task = NULL; @@ -323,58 +409,57 @@ void nfs_callback_down(int minorversion) mutex_unlock(&nfs_callback_mutex); } -static int check_gss_callback_principal(struct nfs_client *clp, - struct svc_rqst *rqstp) +/* Boolean check of RPC_AUTH_GSS principal */ +int +check_gss_callback_principal(struct nfs_client *clp, struct svc_rqst *rqstp) { - struct rpc_clnt *r = clp->cl_rpcclient; - char *p = svc_gss_principal(rqstp); + char *p = rqstp->rq_cred.cr_principal; + if (rqstp->rq_authop->flavour != RPC_AUTH_GSS) + return 1; + + /* No RPC_AUTH_GSS on NFSv4.1 back channel yet */ + if (clp->cl_minorversion != 0) + return 0; /* * It might just be a normal user principal, in which case * userspace won't bother to tell us the name at all. */ if (p == NULL) - return SVC_DENIED; + return 0; /* Expect a GSS_C_NT_HOSTBASED_NAME like "nfs@serverhostname" */ if (memcmp(p, "nfs@", 4) != 0) - return SVC_DENIED; + return 0; p += 4; - if (strcmp(p, r->cl_server) != 0) - return SVC_DENIED; - return SVC_OK; + if (strcmp(p, clp->cl_hostname) != 0) + return 0; + return 1; } +/* + * pg_authenticate method for nfsv4 callback threads. + * + * The authflavor has been negotiated, so an incorrect flavor is a server + * bug. Drop packets with incorrect authflavor. + * + * All other checking done after NFS decoding where the nfs_client can be + * found in nfs4_callback_compound + */ static int nfs_callback_authenticate(struct svc_rqst *rqstp) { - struct nfs_client *clp; - RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); - int ret = SVC_OK; - - /* Don't talk to strangers */ - clp = nfs_find_client(svc_addr(rqstp), 4); - if (clp == NULL) - return SVC_DROP; - - dprintk("%s: %s NFSv4 callback!\n", __func__, - svc_print_addr(rqstp, buf, sizeof(buf))); - switch (rqstp->rq_authop->flavour) { - case RPC_AUTH_NULL: - if (rqstp->rq_proc != CB_NULL) - ret = SVC_DENIED; - break; - case RPC_AUTH_UNIX: - break; - case RPC_AUTH_GSS: - ret = check_gss_callback_principal(clp, rqstp); - break; - default: - ret = SVC_DENIED; + case RPC_AUTH_NULL: + if (rqstp->rq_proc != CB_NULL) + return SVC_DROP; + break; + case RPC_AUTH_GSS: + /* No RPC_AUTH_GSS support yet in NFSv4.1 */ + if (svc_is_backchannel(rqstp)) + return SVC_DROP; } - nfs_put_client(clp); - return ret; + return SVC_OK; } /* diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h index 85a7cfd1b8d..84326e9fb47 100644 --- a/fs/nfs/callback.h +++ b/fs/nfs/callback.h @@ -7,6 +7,7 @@ */ #ifndef __LINUX_FS_NFS_CALLBACK_H #define __LINUX_FS_NFS_CALLBACK_H +#include <linux/sunrpc/svc.h> #define NFS4_CALLBACK 0x40000000 #define NFS4_CALLBACK_XDRSIZE 2048 @@ -31,13 +32,24 @@ enum nfs4_callback_opnum { OP_CB_WANTS_CANCELLED = 12, OP_CB_NOTIFY_LOCK = 13, OP_CB_NOTIFY_DEVICEID = 14, +/* Callback operations new to NFSv4.2 */ + OP_CB_OFFLOAD = 15, OP_CB_ILLEGAL = 10044, }; +struct cb_process_state { + __be32 drc_status; + struct nfs_client *clp; + u32 slotid; + u32 minorversion; + struct net *net; +}; + struct cb_compound_hdr_arg { unsigned int taglen; const char *tag; unsigned int minorversion; + unsigned int cb_ident; /* v4.0 callback identifier */ unsigned nops; }; @@ -103,14 +115,23 @@ struct cb_sequenceres { uint32_t csr_target_highestslotid; }; -extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, - struct cb_sequenceres *res); +extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, + struct cb_sequenceres *res, + struct cb_process_state *cps); extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid); #define RCA4_TYPE_MASK_RDATA_DLG 0 #define RCA4_TYPE_MASK_WDATA_DLG 1 +#define RCA4_TYPE_MASK_DIR_DLG 2 +#define RCA4_TYPE_MASK_FILE_LAYOUT 3 +#define RCA4_TYPE_MASK_BLK_LAYOUT 4 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 +#define RCA4_TYPE_MASK_ALL 0xf31f struct cb_recallanyargs { struct sockaddr *craa_addr; @@ -118,25 +139,66 @@ struct cb_recallanyargs { uint32_t craa_type_mask; }; -extern unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy); +extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, + void *dummy, + struct cb_process_state *cps); struct cb_recallslotargs { struct sockaddr *crsa_addr; - uint32_t crsa_target_max_slots; + uint32_t crsa_target_highest_slotid; +}; +extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, + void *dummy, + struct cb_process_state *cps); + +struct cb_layoutrecallargs { + struct sockaddr *cbl_addr; + uint32_t cbl_recall_type; + uint32_t cbl_layout_type; + uint32_t cbl_layoutchanged; + union { + struct { + struct nfs_fh cbl_fh; + struct pnfs_layout_range cbl_range; + nfs4_stateid cbl_stateid; + }; + struct nfs_fsid cbl_fsid; + }; }; -extern unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args, - void *dummy); -#endif /* CONFIG_NFS_V4_1 */ +extern __be32 nfs4_callback_layoutrecall( + struct cb_layoutrecallargs *args, + void *dummy, struct cb_process_state *cps); -extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res); -extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy); +struct cb_devicenotifyitem { + uint32_t cbd_notify_type; + uint32_t cbd_layout_type; + struct nfs4_deviceid cbd_dev_id; + uint32_t cbd_immediate; +}; -#ifdef CONFIG_NFS_V4 +struct cb_devicenotifyargs { + int ndevs; + struct cb_devicenotifyitem *devs; +}; + +extern __be32 nfs4_callback_devicenotify( + struct cb_devicenotifyargs *args, + void *dummy, struct cb_process_state *cps); + +#endif /* CONFIG_NFS_V4_1 */ +extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); +extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, + struct cb_getattrres *res, + struct cb_process_state *cps); +extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, + struct cb_process_state *cps); +#if IS_ENABLED(CONFIG_NFS_V4) extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); -extern void nfs_callback_down(int minorversion); +extern void nfs_callback_down(int minorversion, struct net *net); extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid); +extern int nfs4_set_callback_sessionid(struct nfs_client *clp); #endif /* CONFIG_NFS_V4 */ /* * nfs41: Callbacks are expected to not cause substantial latency, @@ -148,6 +210,5 @@ extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, extern unsigned int nfs_callback_set_tcpport; extern unsigned short nfs_callback_tcpport; -extern unsigned short nfs_callback_tcpport6; #endif /* __LINUX_FS_NFS_CALLBACK_H */ diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 2950fca0c61..41db5258e7a 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -8,34 +8,40 @@ #include <linux/nfs4.h> #include <linux/nfs_fs.h> #include <linux/slab.h> +#include <linux/rcupdate.h> #include "nfs4_fs.h" #include "callback.h" #include "delegation.h" #include "internal.h" +#include "pnfs.h" +#include "nfs4session.h" +#include "nfs4trace.h" #ifdef NFS_DEBUG #define NFSDBG_FACILITY NFSDBG_CALLBACK #endif - -__be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) + +__be32 nfs4_callback_getattr(struct cb_getattrargs *args, + struct cb_getattrres *res, + struct cb_process_state *cps) { - struct nfs_client *clp; struct nfs_delegation *delegation; struct nfs_inode *nfsi; struct inode *inode; + res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ + goto out; + res->bitmap[0] = res->bitmap[1] = 0; res->status = htonl(NFS4ERR_BADHANDLE); - clp = nfs_find_client(args->addr, 4); - if (clp == NULL) - goto out; - dprintk("NFS: GETATTR callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + dprintk_rcu("NFS: GETATTR callback request from %s\n", + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); - inode = nfs_delegation_find_inode(clp, &args->fh); + inode = nfs_delegation_find_inode(cps->clp, &args->fh); if (inode == NULL) - goto out_putclient; + goto out; nfsi = NFS_I(inode); rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); @@ -55,77 +61,233 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres * out_iput: rcu_read_unlock(); iput(inode); -out_putclient: - nfs_put_client(clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); return res->status; } -__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy) +__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; struct inode *inode; __be32 res; + res = htonl(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ + goto out; + + dprintk_rcu("NFS: RECALL callback request from %s\n", + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + res = htonl(NFS4ERR_BADHANDLE); - clp = nfs_find_client(args->addr, 4); - if (clp == NULL) + inode = nfs_delegation_find_inode(cps->clp, &args->fh); + if (inode == NULL) goto out; + /* Set up a helper thread to actually return the delegation */ + switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { + case 0: + res = 0; + break; + case -ENOENT: + res = htonl(NFS4ERR_BAD_STATEID); + break; + default: + res = htonl(NFS4ERR_RESOURCE); + } + trace_nfs4_recall_delegation(inode, -ntohl(res)); + iput(inode); +out: + dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); + return res; +} - dprintk("NFS: RECALL callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); - - do { - struct nfs_client *prev = clp; - - inode = nfs_delegation_find_inode(clp, &args->fh); - if (inode != NULL) { - /* Set up a helper thread to actually return the delegation */ - switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { - case 0: - res = 0; - break; - case -ENOENT: - if (res != 0) - res = htonl(NFS4ERR_BAD_STATEID); - break; - default: - res = htonl(NFS4ERR_RESOURCE); +#if defined(CONFIG_NFS_V4_1) + +/* + * Lookup a layout by filehandle. + * + * Note: gets a refcount on the layout hdr and on its respective inode. + * Caller must put the layout hdr and the inode. + * + * TODO: keep track of all layouts (and delegations) in a hash table + * hashed by filehandle. + */ +static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, + struct nfs_fh *fh, nfs4_stateid *stateid) +{ + struct nfs_server *server; + struct inode *ino; + struct pnfs_layout_hdr *lo; + + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + list_for_each_entry(lo, &server->layouts, plh_layouts) { + if (!nfs4_stateid_match_other(&lo->plh_stateid, stateid)) + continue; + if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) + continue; + ino = igrab(lo->plh_inode); + if (!ino) + break; + spin_lock(&ino->i_lock); + /* Is this layout in the process of being freed? */ + if (NFS_I(ino)->layout != lo) { + spin_unlock(&ino->i_lock); + iput(ino); + break; } - iput(inode); + pnfs_get_layout_hdr(lo); + spin_unlock(&ino->i_lock); + return lo; } - clp = nfs_find_client_next(prev); - nfs_put_client(prev); - } while (clp != NULL); + } + + return NULL; +} + +static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, + struct nfs_fh *fh, nfs4_stateid *stateid) +{ + struct pnfs_layout_hdr *lo; + + spin_lock(&clp->cl_lock); + rcu_read_lock(); + lo = get_layout_by_fh_locked(clp, fh, stateid); + rcu_read_unlock(); + spin_unlock(&clp->cl_lock); + + return lo; +} + +static u32 initiate_file_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + struct inode *ino; + struct pnfs_layout_hdr *lo; + u32 rv = NFS4ERR_NOMATCHING_LAYOUT; + LIST_HEAD(free_me_list); + + lo = get_layout_by_fh(clp, &args->cbl_fh, &args->cbl_stateid); + if (!lo) + goto out; + + ino = lo->plh_inode; + spin_lock(&ino->i_lock); + if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || + pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, + &args->cbl_range)) + rv = NFS4ERR_DELAY; + else + rv = NFS4ERR_NOMATCHING_LAYOUT; + pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&free_me_list); + pnfs_put_layout_hdr(lo); + iput(ino); out: - dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); + return rv; +} + +static u32 initiate_bulk_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + int stat; + + if (args->cbl_recall_type == RETURN_FSID) + stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); + else + stat = pnfs_destroy_layouts_byclid(clp, true); + if (stat != 0) + return NFS4ERR_DELAY; + return NFS4ERR_NOMATCHING_LAYOUT; +} + +static u32 do_callback_layoutrecall(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + u32 res; + + dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); + if (args->cbl_recall_type == RETURN_FILE) + res = initiate_file_draining(clp, args); + else + res = initiate_bulk_draining(clp, args); + dprintk("%s returning %i\n", __func__, res); return res; + } -int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) +__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, + void *dummy, struct cb_process_state *cps) { - if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data, - sizeof(delegation->stateid.data)) != 0) - return 0; - return 1; + u32 res; + + dprintk("%s: -->\n", __func__); + + if (cps->clp) + res = do_callback_layoutrecall(cps->clp, args); + else + res = NFS4ERR_OP_NOT_IN_SESSION; + + dprintk("%s: exit with status = %d\n", __func__, res); + return cpu_to_be32(res); } -#if defined(CONFIG_NFS_V4_1) +static void pnfs_recall_all_layouts(struct nfs_client *clp) +{ + struct cb_layoutrecallargs args; + + /* Pretend we got a CB_LAYOUTRECALL(ALL) */ + memset(&args, 0, sizeof(args)); + args.cbl_recall_type = RETURN_ALL; + /* FIXME we ignore errors, what should we do? */ + do_callback_layoutrecall(clp, &args); +} -int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) +__be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, + void *dummy, struct cb_process_state *cps) { - if (delegation == NULL) - return 0; + int i; + __be32 res = 0; + struct nfs_client *clp = cps->clp; + struct nfs_server *server = NULL; - if (stateid->stateid.seqid != 0) - return 0; - if (memcmp(&delegation->stateid.stateid.other, - &stateid->stateid.other, - NFS4_STATEID_OTHER_SIZE)) - return 0; + dprintk("%s: -->\n", __func__); - return 1; + if (!clp) { + res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); + goto out; + } + + for (i = 0; i < args->ndevs; i++) { + struct cb_devicenotifyitem *dev = &args->devs[i]; + + if (!server || + server->pnfs_curr_ld->id != dev->cbd_layout_type) { + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + if (server->pnfs_curr_ld && + server->pnfs_curr_ld->id == dev->cbd_layout_type) { + rcu_read_unlock(); + goto found; + } + rcu_read_unlock(); + dprintk("%s: layout type %u not found\n", + __func__, dev->cbd_layout_type); + continue; + } + + found: + if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) + dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, " + "deleting instead\n", __func__); + nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); + } + +out: + kfree(args->devs); + dprintk("%s: exit with status = %u\n", + __func__, be32_to_cpu(res)); + return res; } /* @@ -146,24 +308,24 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) { struct nfs4_slot *slot; - dprintk("%s enter. slotid %d seqid %d\n", + dprintk("%s enter. slotid %u seqid %u\n", __func__, args->csa_slotid, args->csa_sequenceid); - if (args->csa_slotid > NFS41_BC_MAX_CALLBACKS) + if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) return htonl(NFS4ERR_BADSLOT); slot = tbl->slots + args->csa_slotid; - dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); + dprintk("%s slot table seqid: %u\n", __func__, slot->seq_nr); /* Normal */ if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { slot->seq_nr++; - return htonl(NFS4_OK); + goto out_ok; } /* Replay */ if (args->csa_sequenceid == slot->seq_nr) { - dprintk("%s seqid %d is a replay\n", + dprintk("%s seqid %u is a replay\n", __func__, args->csa_sequenceid); /* Signal process_op to set this error on next op */ if (args->csa_cachethis == 0) @@ -177,47 +339,14 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) /* Wraparound */ if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { slot->seq_nr = 1; - return htonl(NFS4_OK); + goto out_ok; } /* Misordered request */ return htonl(NFS4ERR_SEQ_MISORDERED); -} - -/* - * Returns a pointer to a held 'struct nfs_client' that matches the server's - * address, major version number, and session ID. It is the caller's - * responsibility to release the returned reference. - * - * Returns NULL if there are no connections with sessions, or if no session - * matches the one of interest. - */ - static struct nfs_client *find_client_with_session( - const struct sockaddr *addr, u32 nfsversion, - struct nfs4_sessionid *sessionid) -{ - struct nfs_client *clp; - - clp = nfs_find_client(addr, 4); - if (clp == NULL) - return NULL; - - do { - struct nfs_client *prev = clp; - - if (clp->cl_session != NULL) { - if (memcmp(clp->cl_session->sess_id.data, - sessionid->data, - NFS4_MAX_SESSIONID_LEN) == 0) { - /* Returns a held reference to clp */ - return clp; - } - } - clp = nfs_find_client_next(prev); - nfs_put_client(prev); - } while (clp != NULL); - - return NULL; +out_ok: + tbl->highest_used_slotid = args->csa_slotid; + return htonl(NFS4_OK); } /* @@ -276,20 +405,40 @@ out: } __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, - struct cb_sequenceres *res) + struct cb_sequenceres *res, + struct cb_process_state *cps) { + struct nfs4_slot_table *tbl; struct nfs_client *clp; int i; - __be32 status; + __be32 status = htonl(NFS4ERR_BADSESSION); - status = htonl(NFS4ERR_BADSESSION); - clp = find_client_with_session(args->csa_addr, 4, &args->csa_sessionid); + clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, + &args->csa_sessionid, cps->minorversion); if (clp == NULL) goto out; + tbl = &clp->cl_session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + /* state manager is resetting the session */ + if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { + spin_unlock(&tbl->slot_tbl_lock); + status = htonl(NFS4ERR_DELAY); + /* Return NFS4ERR_BADSESSION if we're draining the session + * in order to reset it. + */ + if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) + status = htonl(NFS4ERR_BADSESSION); + goto out; + } + status = validate_seqid(&clp->cl_session->bc_slot_table, args); + spin_unlock(&tbl->slot_tbl_lock); if (status) - goto out_putclient; + goto out; + + cps->slotid = args->csa_slotid; /* * Check for pending referring calls. If a match is found, a @@ -298,7 +447,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, */ if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { status = htonl(NFS4ERR_DELAY); - goto out_putclient; + goto out; } memcpy(&res->csr_sessionid, &args->csa_sessionid, @@ -308,82 +457,85 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; -out_putclient: - nfs_put_client(clp); out: + cps->clp = clp; /* put in nfs4_callback_compound */ for (i = 0; i < args->csa_nrclists; i++) kfree(args->csa_rclists[i].rcl_refcalls); kfree(args->csa_rclists); - if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) - res->csr_status = 0; - else + if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { + cps->drc_status = status; + status = 0; + } else res->csr_status = status; + + trace_nfs4_cb_sequence(args, res, status); dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, ntohl(status), ntohl(res->csr_status)); return status; } -__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy) +static bool +validate_bitmap_values(unsigned long mask) +{ + return (mask & ~RCA4_TYPE_MASK_ALL) == 0; +} + +__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; __be32 status; fmode_t flags = 0; - status = htonl(NFS4ERR_OP_NOT_IN_SESSION); - clp = nfs_find_client(args->craa_addr, 4); - if (clp == NULL) + status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* set in cb_sequence */ goto out; - dprintk("NFS: RECALL_ANY callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + + status = cpu_to_be32(NFS4ERR_INVAL); + if (!validate_bitmap_values(args->craa_type_mask)) + goto out; + status = cpu_to_be32(NFS4_OK); if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) &args->craa_type_mask)) flags = FMODE_READ; if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) &args->craa_type_mask)) flags |= FMODE_WRITE; - + if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) + &args->craa_type_mask)) + pnfs_recall_all_layouts(cps->clp); if (flags) - nfs_expire_all_delegation_types(clp, flags); - status = htonl(NFS4_OK); + nfs_expire_unused_delegation_types(cps->clp, flags); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; } /* Reduce the fore channel's max_slots to the target value */ -__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy) +__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; struct nfs4_slot_table *fc_tbl; __be32 status; status = htonl(NFS4ERR_OP_NOT_IN_SESSION); - clp = nfs_find_client(args->crsa_addr, 4); - if (clp == NULL) + if (!cps->clp) /* set in cb_sequence */ goto out; - dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), - args->crsa_target_max_slots); - - fc_tbl = &clp->cl_session->fc_slot_table; + dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n", + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), + args->crsa_target_highest_slotid); - status = htonl(NFS4ERR_BAD_HIGH_SLOT); - if (args->crsa_target_max_slots > fc_tbl->max_slots || - args->crsa_target_max_slots < 1) - goto out_putclient; + fc_tbl = &cps->clp->cl_session->fc_slot_table; status = htonl(NFS4_OK); - if (args->crsa_target_max_slots == fc_tbl->max_slots) - goto out_putclient; - fc_tbl->target_max_slots = args->crsa_target_max_slots; - nfs41_handle_recall_slot(clp); -out_putclient: - nfs_put_client(clp); /* balance nfs_find_client */ + nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); + nfs41_server_notify_target_slotid_update(cps->clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index 05af212f0ed..f4ccfe6521e 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -9,9 +9,14 @@ #include <linux/sunrpc/svc.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> +#include <linux/ratelimit.h> +#include <linux/printk.h> #include <linux/slab.h> +#include <linux/sunrpc/bc_xprt.h> #include "nfs4_fs.h" #include "callback.h" +#include "internal.h" +#include "nfs4session.h" #define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) @@ -22,6 +27,8 @@ #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) #if defined(CONFIG_NFS_V4_1) +#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) +#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 4 + 1 + 3) #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) @@ -33,7 +40,8 @@ /* Internal error code */ #define NFS4ERR_RESOURCE_HDR 11050 -typedef __be32 (*callback_process_op_t)(void *, void *); +typedef __be32 (*callback_process_op_t)(void *, void *, + struct cb_process_state *); typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); @@ -68,7 +76,7 @@ static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) p = xdr_inline_decode(xdr, nbytes); if (unlikely(p == NULL)) - printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n"); + printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n"); return p; } @@ -133,10 +141,10 @@ static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) { __be32 *p; - p = read_buf(xdr, 16); + p = read_buf(xdr, NFS4_STATEID_SIZE); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); - memcpy(stateid->data, p, 16); + memcpy(stateid, p, NFS4_STATEID_SIZE); return 0; } @@ -150,7 +158,7 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound return status; /* We do not like overly long tags! */ if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { - printk("NFSv4 CALLBACK %s: client sent tag of length %u\n", + printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n", __func__, hdr->taglen); return htonl(NFS4ERR_RESOURCE); } @@ -158,11 +166,11 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); hdr->minorversion = ntohl(*p++); - /* Check minor version is zero or one. */ - if (hdr->minorversion <= 1) { - p++; /* skip callback_ident */ + /* Check for minor version support */ + if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { + hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ } else { - printk(KERN_WARNING "%s: NFSv4 server callback with " + pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " "illegal minor version %u!\n", __func__, hdr->minorversion); return htonl(NFS4ERR_MINOR_VERS_MISMATCH); @@ -220,6 +228,157 @@ out: #if defined(CONFIG_NFS_V4_1) +static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, + struct xdr_stream *xdr, + struct cb_layoutrecallargs *args) +{ + __be32 *p; + __be32 status = 0; + uint32_t iomode; + + args->cbl_addr = svc_addr(rqstp); + p = read_buf(xdr, 4 * sizeof(uint32_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + + args->cbl_layout_type = ntohl(*p++); + /* Depite the spec's xdr, iomode really belongs in the FILE switch, + * as it is unusable and ignored with the other types. + */ + iomode = ntohl(*p++); + args->cbl_layoutchanged = ntohl(*p++); + args->cbl_recall_type = ntohl(*p++); + + if (args->cbl_recall_type == RETURN_FILE) { + args->cbl_range.iomode = iomode; + status = decode_fh(xdr, &args->cbl_fh); + if (unlikely(status != 0)) + goto out; + + p = read_buf(xdr, 2 * sizeof(uint64_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + p = xdr_decode_hyper(p, &args->cbl_range.offset); + p = xdr_decode_hyper(p, &args->cbl_range.length); + status = decode_stateid(xdr, &args->cbl_stateid); + if (unlikely(status != 0)) + goto out; + } else if (args->cbl_recall_type == RETURN_FSID) { + p = read_buf(xdr, 2 * sizeof(uint64_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + p = xdr_decode_hyper(p, &args->cbl_fsid.major); + p = xdr_decode_hyper(p, &args->cbl_fsid.minor); + } else if (args->cbl_recall_type != RETURN_ALL) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", + __func__, + args->cbl_layout_type, iomode, + args->cbl_layoutchanged, args->cbl_recall_type); +out: + dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); + return status; +} + +static +__be32 decode_devicenotify_args(struct svc_rqst *rqstp, + struct xdr_stream *xdr, + struct cb_devicenotifyargs *args) +{ + __be32 *p; + __be32 status = 0; + u32 tmp; + int n, i; + args->ndevs = 0; + + /* Num of device notifications */ + p = read_buf(xdr, sizeof(uint32_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + n = ntohl(*p++); + if (n <= 0) + goto out; + if (n > ULONG_MAX / sizeof(*args->devs)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + + args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL); + if (!args->devs) { + status = htonl(NFS4ERR_DELAY); + goto out; + } + + /* Decode each dev notification */ + for (i = 0; i < n; i++) { + struct cb_devicenotifyitem *dev = &args->devs[i]; + + p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto err; + } + + tmp = ntohl(*p++); /* bitmap size */ + if (tmp != 1) { + status = htonl(NFS4ERR_INVAL); + goto err; + } + dev->cbd_notify_type = ntohl(*p++); + if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE && + dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) { + status = htonl(NFS4ERR_INVAL); + goto err; + } + + tmp = ntohl(*p++); /* opaque size */ + if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) && + (tmp != NFS4_DEVICEID4_SIZE + 8)) || + ((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) && + (tmp != NFS4_DEVICEID4_SIZE + 4))) { + status = htonl(NFS4ERR_INVAL); + goto err; + } + dev->cbd_layout_type = ntohl(*p++); + memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE); + p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); + + if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) { + p = read_buf(xdr, sizeof(uint32_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto err; + } + dev->cbd_immediate = ntohl(*p++); + } else { + dev->cbd_immediate = 0; + } + + args->ndevs++; + + dprintk("%s: type %d layout 0x%x immediate %d\n", + __func__, dev->cbd_notify_type, dev->cbd_layout_type, + dev->cbd_immediate); + } +out: + dprintk("%s: status %d ndevs %d\n", + __func__, ntohl(status), args->ndevs); + return status; +err: + kfree(args->devs); + goto out; +} + static __be32 decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid) { @@ -297,9 +456,9 @@ static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, args->csa_nrclists = ntohl(*p++); args->csa_rclists = NULL; if (args->csa_nrclists) { - args->csa_rclists = kmalloc(args->csa_nrclists * - sizeof(*args->csa_rclists), - GFP_KERNEL); + args->csa_rclists = kmalloc_array(args->csa_nrclists, + sizeof(*args->csa_rclists), + GFP_KERNEL); if (unlikely(args->csa_rclists == NULL)) goto out; @@ -336,17 +495,18 @@ static __be32 decode_recallany_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallanyargs *args) { - __be32 *p; + uint32_t bitmap[2]; + __be32 *p, status; args->craa_addr = svc_addr(rqstp); p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_BADXDR); args->craa_objs_to_keep = ntohl(*p++); - p = read_buf(xdr, 4); - if (unlikely(p == NULL)) - return htonl(NFS4ERR_BADXDR); - args->craa_type_mask = ntohl(*p); + status = decode_bitmap(xdr, bitmap); + if (unlikely(status)) + return status; + args->craa_type_mask = bitmap[0]; return 0; } @@ -361,7 +521,7 @@ static __be32 decode_recallslot_args(struct svc_rqst *rqstp, p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_BADXDR); - args->crsa_target_max_slots = ntohl(*p++); + args->crsa_target_highest_slotid = ntohl(*p++); return 0; } @@ -537,7 +697,7 @@ static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, const struct cb_sequenceres *res) { __be32 *p; - unsigned status = res->csr_status; + __be32 status = res->csr_status; if (unlikely(status != 0)) goto out; @@ -574,11 +734,11 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) case OP_CB_SEQUENCE: case OP_CB_RECALL_ANY: case OP_CB_RECALL_SLOT: + case OP_CB_LAYOUTRECALL: + case OP_CB_NOTIFY_DEVICEID: *op = &callback_ops[op_nr]; break; - case OP_CB_LAYOUTRECALL: - case OP_CB_NOTIFY_DEVICEID: case OP_CB_NOTIFY: case OP_CB_PUSH_DELEG: case OP_CB_RECALLABLE_OBJ_AVAIL: @@ -593,6 +753,26 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS_OK); } +static void nfs4_callback_free_slot(struct nfs4_session *session) +{ + struct nfs4_slot_table *tbl = &session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + /* + * Let the state manager know callback processing done. + * A single slot, so highest used slotid is either 0 or -1 + */ + tbl->highest_used_slotid = NFS4_NO_SLOT; + nfs4_slot_tbl_drain_complete(tbl); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs4_cb_free_slot(struct cb_process_state *cps) +{ + if (cps->slotid != NFS4_NO_SLOT) + nfs4_callback_free_slot(cps->clp->cl_session); +} + #else /* CONFIG_NFS_V4_1 */ static __be32 @@ -601,8 +781,31 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } +static void nfs4_cb_free_slot(struct cb_process_state *cps) +{ +} #endif /* CONFIG_NFS_V4_1 */ +#ifdef CONFIG_NFS_V4_2 +static __be32 +preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) +{ + __be32 status = preprocess_nfs41_op(nop, op_nr, op); + if (status != htonl(NFS4ERR_OP_ILLEGAL)) + return status; + + if (op_nr == OP_CB_OFFLOAD) + return htonl(NFS4ERR_NOTSUPP); + return htonl(NFS4ERR_OP_ILLEGAL); +} +#else /* CONFIG_NFS_V4_2 */ +static __be32 +preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) +{ + return htonl(NFS4ERR_MINOR_VERS_MISMATCH); +} +#endif /* CONFIG_NFS_V4_2 */ + static __be32 preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) { @@ -618,10 +821,10 @@ preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) return htonl(NFS_OK); } -static __be32 process_op(uint32_t minorversion, int nop, - struct svc_rqst *rqstp, +static __be32 process_op(int nop, struct svc_rqst *rqstp, struct xdr_stream *xdr_in, void *argp, - struct xdr_stream *xdr_out, void *resp, int* drc_status) + struct xdr_stream *xdr_out, void *resp, + struct cb_process_state *cps) { struct callback_op *op = &callback_ops[0]; unsigned int op_nr; @@ -635,17 +838,29 @@ static __be32 process_op(uint32_t minorversion, int nop, return status; dprintk("%s: minorversion=%d nop=%d op_nr=%u\n", - __func__, minorversion, nop, op_nr); + __func__, cps->minorversion, nop, op_nr); + + switch (cps->minorversion) { + case 0: + status = preprocess_nfs4_op(op_nr, &op); + break; + case 1: + status = preprocess_nfs41_op(nop, op_nr, &op); + break; + case 2: + status = preprocess_nfs42_op(nop, op_nr, &op); + break; + default: + status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); + } - status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) : - preprocess_nfs4_op(op_nr, &op); if (status == htonl(NFS4ERR_OP_ILLEGAL)) op_nr = OP_CB_ILLEGAL; if (status) goto encode_hdr; - if (*drc_status) { - status = *drc_status; + if (cps->drc_status) { + status = cps->drc_status; goto encode_hdr; } @@ -653,16 +868,10 @@ static __be32 process_op(uint32_t minorversion, int nop, if (maxlen > 0 && maxlen < PAGE_SIZE) { status = op->decode_args(rqstp, xdr_in, argp); if (likely(status == 0)) - status = op->process_op(argp, resp); + status = op->process_op(argp, resp, cps); } else status = htonl(NFS4ERR_RESOURCE); - /* Only set by OP_CB_SEQUENCE processing */ - if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { - *drc_status = status; - status = 0; - } - encode_hdr: res = encode_op_hdr(xdr_out, op_nr, status); if (unlikely(res)) @@ -681,8 +890,13 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r struct cb_compound_hdr_arg hdr_arg = { 0 }; struct cb_compound_hdr_res hdr_res = { NULL }; struct xdr_stream xdr_in, xdr_out; - __be32 *p; - __be32 status, drc_status = 0; + __be32 *p, status; + struct cb_process_state cps = { + .drc_status = 0, + .clp = NULL, + .slotid = NFS4_NO_SLOT, + .net = SVC_NET(rqstp), + }; unsigned int nops = 0; dprintk("%s: start\n", __func__); @@ -696,14 +910,21 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r if (status == __constant_htonl(NFS4ERR_RESOURCE)) return rpc_garbage_args; + if (hdr_arg.minorversion == 0) { + cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); + if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) + return rpc_drop_reply; + } + + cps.minorversion = hdr_arg.minorversion; hdr_res.taglen = hdr_arg.taglen; hdr_res.tag = hdr_arg.tag; if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) return rpc_system_err; while (status == 0 && nops != hdr_arg.nops) { - status = process_op(hdr_arg.minorversion, nops, rqstp, - &xdr_in, argp, &xdr_out, resp, &drc_status); + status = process_op(nops, rqstp, &xdr_in, + argp, &xdr_out, resp, &cps); nops++; } @@ -716,6 +937,8 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r *hdr_res.status = status; *hdr_res.nops = htonl(nops); + nfs4_cb_free_slot(&cps); + nfs_put_client(cps.clp); dprintk("%s: done, status = %u\n", __func__, ntohl(status)); return rpc_success; } @@ -739,6 +962,18 @@ static struct callback_op callback_ops[] = { .res_maxsize = CB_OP_RECALL_RES_MAXSZ, }, #if defined(CONFIG_NFS_V4_1) + [OP_CB_LAYOUTRECALL] = { + .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, + .decode_args = + (callback_decode_arg_t)decode_layoutrecall_args, + .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, + }, + [OP_CB_NOTIFY_DEVICEID] = { + .process_op = (callback_process_op_t)nfs4_callback_devicenotify, + .decode_args = + (callback_decode_arg_t)decode_devicenotify_args, + .res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ, + }, [OP_CB_SEQUENCE] = { .process_op = (callback_process_op_t)nfs4_callback_sequence, .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, @@ -792,4 +1027,5 @@ struct svc_version nfs4_callback_version4 = { .vs_proc = nfs4_callback_procedures1, .vs_xdrsize = NFS4_CALLBACK_XDRSIZE, .vs_dispatch = NULL, + .vs_hidden = 1, }; diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 0870d0d4efc..1d09289c8f0 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -36,11 +36,13 @@ #include <linux/inet.h> #include <linux/in6.h> #include <linux/slab.h> +#include <linux/idr.h> #include <net/ipv6.h> #include <linux/nfs_xdr.h> #include <linux/sunrpc/bc_xprt.h> +#include <linux/nsproxy.h> +#include <linux/pid_namespace.h> -#include <asm/system.h> #include "nfs4_fs.h" #include "callback.h" @@ -49,64 +51,96 @@ #include "internal.h" #include "fscache.h" #include "pnfs.h" +#include "nfs.h" +#include "netns.h" #define NFSDBG_FACILITY NFSDBG_CLIENT -static DEFINE_SPINLOCK(nfs_client_lock); -static LIST_HEAD(nfs_client_list); -static LIST_HEAD(nfs_volume_list); static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); +static DEFINE_SPINLOCK(nfs_version_lock); +static DEFINE_MUTEX(nfs_version_mutex); +static LIST_HEAD(nfs_versions); /* * RPC cruft for NFS */ -static struct rpc_version *nfs_version[5] = { - [2] = &nfs_version2, -#ifdef CONFIG_NFS_V3 - [3] = &nfs_version3, -#endif -#ifdef CONFIG_NFS_V4 - [4] = &nfs_version4, -#endif +static const struct rpc_version *nfs_version[5] = { + [2] = NULL, + [3] = NULL, + [4] = NULL, }; -struct rpc_program nfs_program = { +const struct rpc_program nfs_program = { .name = "nfs", .number = NFS_PROGRAM, .nrvers = ARRAY_SIZE(nfs_version), .version = nfs_version, .stats = &nfs_rpcstat, - .pipe_dir_name = "/nfs", + .pipe_dir_name = NFS_PIPE_DIRNAME, }; struct rpc_stat nfs_rpcstat = { .program = &nfs_program }; +static struct nfs_subversion *find_nfs_version(unsigned int version) +{ + struct nfs_subversion *nfs; + spin_lock(&nfs_version_lock); -#ifdef CONFIG_NFS_V3_ACL -static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; -static struct rpc_version * nfsacl_version[] = { - [3] = &nfsacl_version3, -}; + list_for_each_entry(nfs, &nfs_versions, list) { + if (nfs->rpc_ops->version == version) { + spin_unlock(&nfs_version_lock); + return nfs; + } + } -struct rpc_program nfsacl_program = { - .name = "nfsacl", - .number = NFS_ACL_PROGRAM, - .nrvers = ARRAY_SIZE(nfsacl_version), - .version = nfsacl_version, - .stats = &nfsacl_rpcstat, -}; -#endif /* CONFIG_NFS_V3_ACL */ - -struct nfs_client_initdata { - const char *hostname; - const struct sockaddr *addr; - size_t addrlen; - const struct nfs_rpc_ops *rpc_ops; - int proto; - u32 minorversion; -}; + spin_unlock(&nfs_version_lock); + return ERR_PTR(-EPROTONOSUPPORT); +} + +struct nfs_subversion *get_nfs_version(unsigned int version) +{ + struct nfs_subversion *nfs = find_nfs_version(version); + + if (IS_ERR(nfs)) { + mutex_lock(&nfs_version_mutex); + request_module("nfsv%d", version); + nfs = find_nfs_version(version); + mutex_unlock(&nfs_version_mutex); + } + + if (!IS_ERR(nfs)) + try_module_get(nfs->owner); + return nfs; +} + +void put_nfs_version(struct nfs_subversion *nfs) +{ + module_put(nfs->owner); +} + +void register_nfs_version(struct nfs_subversion *nfs) +{ + spin_lock(&nfs_version_lock); + + list_add(&nfs->list, &nfs_versions); + nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; + + spin_unlock(&nfs_version_lock); +} +EXPORT_SYMBOL_GPL(register_nfs_version); + +void unregister_nfs_version(struct nfs_subversion *nfs) +{ + spin_lock(&nfs_version_lock); + + nfs_version[nfs->rpc_ops->version] = NULL; + list_del(&nfs->list); + + spin_unlock(&nfs_version_lock); +} +EXPORT_SYMBOL_GPL(unregister_nfs_version); /* * Allocate a shared client record @@ -114,7 +148,7 @@ struct nfs_client_initdata { * Since these are allocated/deallocated very rarely, we don't * bother putting them in a slab cache... */ -static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) +struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) { struct nfs_client *clp; struct rpc_cred *cred; @@ -123,7 +157,10 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) goto error_0; - clp->rpc_ops = cl_init->rpc_ops; + clp->cl_nfs_mod = cl_init->nfs_mod; + try_module_get(clp->cl_nfs_mod->owner); + + clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; atomic_set(&clp->cl_count, 1); clp->cl_cons_state = NFS_CS_INITING; @@ -142,85 +179,67 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ clp->cl_rpcclient = ERR_PTR(-EINVAL); clp->cl_proto = cl_init->proto; + clp->cl_net = get_net(cl_init->net); -#ifdef CONFIG_NFS_V4 - INIT_LIST_HEAD(&clp->cl_delegations); - spin_lock_init(&clp->cl_lock); - INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); - rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); - clp->cl_boot_time = CURRENT_TIME; - clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; - clp->cl_minorversion = cl_init->minorversion; - clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; -#endif - cred = rpc_lookup_machine_cred(); + cred = rpc_lookup_machine_cred("*"); if (!IS_ERR(cred)) clp->cl_machine_cred = cred; -#if defined(CONFIG_NFS_V4_1) - INIT_LIST_HEAD(&clp->cl_layouts); -#endif nfs_fscache_get_client_cookie(clp); return clp; error_cleanup: + put_nfs_version(clp->cl_nfs_mod); kfree(clp); error_0: return ERR_PTR(err); } +EXPORT_SYMBOL_GPL(nfs_alloc_client); -#ifdef CONFIG_NFS_V4 -/* - * Clears/puts all minor version specific parts from an nfs_client struct - * reverting it to minorversion 0. - */ -static void nfs4_clear_client_minor_version(struct nfs_client *clp) +#if IS_ENABLED(CONFIG_NFS_V4) +void nfs_cleanup_cb_ident_idr(struct net *net) { -#ifdef CONFIG_NFS_V4_1 - if (nfs4_has_session(clp)) { - nfs4_destroy_session(clp->cl_session); - clp->cl_session = NULL; - } + struct nfs_net *nn = net_generic(net, nfs_net_id); - clp->cl_mvops = nfs_v4_minor_ops[0]; -#endif /* CONFIG_NFS_V4_1 */ + idr_destroy(&nn->cb_ident_idr); } -/* - * Destroy the NFS4 callback service - */ -static void nfs4_destroy_callback(struct nfs_client *clp) +/* nfs_client_lock held */ +static void nfs_cb_idr_remove_locked(struct nfs_client *clp) { - if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) - nfs_callback_down(clp->cl_mvops->minor_version); + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + + if (clp->cl_cb_ident) + idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); } -static void nfs4_shutdown_client(struct nfs_client *clp) +static void pnfs_init_server(struct nfs_server *server) { - if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) - nfs4_kill_renewd(clp); - nfs4_clear_client_minor_version(clp); - nfs4_destroy_callback(clp); - if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) - nfs_idmap_delete(clp); - - rpc_destroy_wait_queue(&clp->cl_rpcwaitq); + rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); } + #else -static void nfs4_shutdown_client(struct nfs_client *clp) +void nfs_cleanup_cb_ident_idr(struct net *net) +{ +} + +static void nfs_cb_idr_remove_locked(struct nfs_client *clp) +{ +} + +static void pnfs_init_server(struct nfs_server *server) { } + #endif /* CONFIG_NFS_V4 */ /* * Destroy a shared client record */ -static void nfs_free_client(struct nfs_client *clp) +void nfs_free_client(struct nfs_client *clp) { dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); - nfs4_shutdown_client(clp); - nfs_fscache_release_client_cookie(clp); /* -EIO all pending I/O */ @@ -230,29 +249,36 @@ static void nfs_free_client(struct nfs_client *clp) if (clp->cl_machine_cred != NULL) put_rpccred(clp->cl_machine_cred); + put_net(clp->cl_net); + put_nfs_version(clp->cl_nfs_mod); kfree(clp->cl_hostname); kfree(clp); dprintk("<-- nfs_free_client()\n"); } +EXPORT_SYMBOL_GPL(nfs_free_client); /* * Release a reference to a shared client record */ void nfs_put_client(struct nfs_client *clp) { + struct nfs_net *nn; + if (!clp) return; dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); + nn = net_generic(clp->cl_net, nfs_net_id); - if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { + if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { list_del(&clp->cl_share_link); - spin_unlock(&nfs_client_lock); + nfs_cb_idr_remove_locked(clp); + spin_unlock(&nn->nfs_client_lock); - BUG_ON(!list_empty(&clp->cl_superblocks)); + WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); - nfs_free_client(clp); + clp->rpc_ops->free_client(clp); } } EXPORT_SYMBOL_GPL(nfs_put_client); @@ -275,11 +301,12 @@ static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; - if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && - sin1->sin6_scope_id != sin2->sin6_scope_id) + if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) return 0; + else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) + return sin1->sin6_scope_id == sin2->sin6_scope_id; - return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); + return 1; } #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, @@ -325,12 +352,13 @@ static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, (sin1->sin_port == sin2->sin_port); } +#if defined(CONFIG_NFS_V4_1) /* * Test if two socket addresses represent the same actual socket, * by comparing (only) relevant fields, excluding the port number. */ -static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, - const struct sockaddr *sa2) +int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, + const struct sockaddr *sa2) { if (sa1->sa_family != sa2->sa_family) return 0; @@ -343,6 +371,8 @@ static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, } return 0; } +EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr); +#endif /* CONFIG_NFS_V4_1 */ /* * Test if two socket addresses represent the same actual socket, @@ -364,72 +394,6 @@ static int nfs_sockaddr_cmp(const struct sockaddr *sa1, } /* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) -{ - struct nfs_client *clp; - - spin_lock(&nfs_client_lock); - list_for_each_entry(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - - /* Don't match clients that failed to initialise properly */ - if (!(clp->cl_cons_state == NFS_CS_READY || - clp->cl_cons_state == NFS_CS_SESSION_INITING)) - continue; - - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsversion) - continue; - - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(addr, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; -} - -/* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client_next(struct nfs_client *clp) -{ - struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; - u32 nfsvers = clp->rpc_ops->version; - - spin_lock(&nfs_client_lock); - list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - - /* Don't match clients that failed to initialise properly */ - if (clp->cl_cons_state != NFS_CS_READY) - continue; - - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsvers) - continue; - - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(sap, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; -} - -/* * Find an nfs_client on the list that matches the initialisation data * that is supplied. */ @@ -437,15 +401,16 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat { struct nfs_client *clp; const struct sockaddr *sap = data->addr; + struct nfs_net *nn = net_generic(data->net, nfs_net_id); - list_for_each_entry(clp, &nfs_client_list, cl_share_link) { + list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; /* Don't match clients that failed to initialise properly */ if (clp->cl_cons_state < 0) continue; /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops != data->rpc_ops) + if (clp->rpc_ops != data->nfs_mod->rpc_ops) continue; if (clp->cl_proto != data->proto) @@ -463,55 +428,28 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat return NULL; } +static bool nfs_client_init_is_complete(const struct nfs_client *clp) +{ + return clp->cl_cons_state != NFS_CS_INITING; +} + +int nfs_wait_client_init_complete(const struct nfs_client *clp) +{ + return wait_event_killable(nfs_client_active_wq, + nfs_client_init_is_complete(clp)); +} +EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); + /* - * Look up a client by IP address and protocol version - * - creates a new record if one doesn't yet exist + * Found an existing client. Make sure it's ready before returning. */ -static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) +static struct nfs_client * +nfs_found_client(const struct nfs_client_initdata *cl_init, + struct nfs_client *clp) { - struct nfs_client *clp, *new = NULL; int error; - dprintk("--> nfs_get_client(%s,v%u)\n", - cl_init->hostname ?: "", cl_init->rpc_ops->version); - - /* see if the client already exists */ - do { - spin_lock(&nfs_client_lock); - - clp = nfs_match_client(cl_init); - if (clp) - goto found_client; - if (new) - goto install_client; - - spin_unlock(&nfs_client_lock); - - new = nfs_alloc_client(cl_init); - } while (!IS_ERR(new)); - - dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); - return new; - - /* install a new client and return with it unready */ -install_client: - clp = new; - list_add(&clp->cl_share_link, &nfs_client_list); - spin_unlock(&nfs_client_lock); - dprintk("--> nfs_get_client() = %p [new]\n", clp); - return clp; - - /* found an existing client - * - make sure it's ready before returning - */ -found_client: - spin_unlock(&nfs_client_lock); - - if (new) - nfs_free_client(new); - - error = wait_event_killable(nfs_client_active_wq, - clp->cl_cons_state < NFS_CS_INITING); + error = nfs_wait_client_init_complete(clp); if (error < 0) { nfs_put_client(clp); return ERR_PTR(-ERESTARTSYS); @@ -523,41 +461,75 @@ found_client: return ERR_PTR(error); } - BUG_ON(clp->cl_cons_state != NFS_CS_READY); + smp_rmb(); - dprintk("--> nfs_get_client() = %p [share]\n", clp); + dprintk("<-- %s found nfs_client %p for %s\n", + __func__, clp, cl_init->hostname ?: ""); return clp; } /* - * Mark a server as ready or failed + * Look up a client by IP address and protocol version + * - creates a new record if one doesn't yet exist */ -void nfs_mark_client_ready(struct nfs_client *clp, int state) +struct nfs_client * +nfs_get_client(const struct nfs_client_initdata *cl_init, + const struct rpc_timeout *timeparms, + const char *ip_addr, + rpc_authflavor_t authflavour) { - clp->cl_cons_state = state; - wake_up_all(&nfs_client_active_wq); + struct nfs_client *clp, *new = NULL; + struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); + const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; + + dprintk("--> nfs_get_client(%s,v%u)\n", + cl_init->hostname ?: "", rpc_ops->version); + + /* see if the client already exists */ + do { + spin_lock(&nn->nfs_client_lock); + + clp = nfs_match_client(cl_init); + if (clp) { + spin_unlock(&nn->nfs_client_lock); + if (new) + new->rpc_ops->free_client(new); + return nfs_found_client(cl_init, clp); + } + if (new) { + list_add_tail(&new->cl_share_link, + &nn->nfs_client_list); + spin_unlock(&nn->nfs_client_lock); + new->cl_flags = cl_init->init_flags; + return rpc_ops->init_client(new, timeparms, ip_addr); + } + + spin_unlock(&nn->nfs_client_lock); + + new = rpc_ops->alloc_client(cl_init); + } while (!IS_ERR(new)); + + dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", + cl_init->hostname ?: "", PTR_ERR(new)); + return new; } +EXPORT_SYMBOL_GPL(nfs_get_client); /* - * With sessions, the client is not marked ready until after a - * successful EXCHANGE_ID and CREATE_SESSION. - * - * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate - * other versions of NFS can be tried. + * Mark a server as ready or failed */ -int nfs4_check_client_ready(struct nfs_client *clp) +void nfs_mark_client_ready(struct nfs_client *clp, int state) { - if (!nfs4_has_session(clp)) - return 0; - if (clp->cl_cons_state < NFS_CS_READY) - return -EPROTONOSUPPORT; - return 0; + smp_wmb(); + clp->cl_cons_state = state; + wake_up_all(&nfs_client_active_wq); } +EXPORT_SYMBOL_GPL(nfs_mark_client_ready); /* * Initialise the timeout values for a connection */ -static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, +void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) { to->to_initval = timeo * HZ / 10; @@ -594,18 +566,18 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, BUG(); } } +EXPORT_SYMBOL_GPL(nfs_init_timeout_values); /* * Create an RPC client handle */ -static int nfs_create_rpc_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - rpc_authflavor_t flavor, - int discrtry, int noresvport) +int nfs_create_rpc_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + rpc_authflavor_t flavor) { struct rpc_clnt *clnt = NULL; struct rpc_create_args args = { - .net = &init_net, + .net = clp->cl_net, .protocol = clp->cl_proto, .address = (struct sockaddr *)&clp->cl_addr, .addrsize = clp->cl_addrlen, @@ -616,10 +588,14 @@ static int nfs_create_rpc_client(struct nfs_client *clp, .authflavor = flavor, }; - if (discrtry) + if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) args.flags |= RPC_CLNT_CREATE_DISCRTRY; - if (noresvport) + if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) + args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; + if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; + if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) + args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; if (!IS_ERR(clp->cl_rpcclient)) return 0; @@ -634,14 +610,14 @@ static int nfs_create_rpc_client(struct nfs_client *clp, clp->cl_rpcclient = clnt; return 0; } +EXPORT_SYMBOL_GPL(nfs_create_rpc_client); /* * Version 2 or 3 client destruction */ static void nfs_destroy_server(struct nfs_server *server) { - if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || - !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) + if (server->nlm_host) nlmclnt_done(server->nlm_host); } @@ -659,6 +635,7 @@ static int nfs_start_lockd(struct nfs_server *server) .nfs_version = clp->rpc_ops->version, .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? 1 : 0, + .net = clp->cl_net, }; if (nlm_init.nfs_version > 3) @@ -685,45 +662,16 @@ static int nfs_start_lockd(struct nfs_server *server) } /* - * Initialise an NFSv3 ACL client connection - */ -#ifdef CONFIG_NFS_V3_ACL -static void nfs_init_server_aclclient(struct nfs_server *server) -{ - if (server->nfs_client->rpc_ops->version != 3) - goto out_noacl; - if (server->flags & NFS_MOUNT_NOACL) - goto out_noacl; - - server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); - if (IS_ERR(server->client_acl)) - goto out_noacl; - - /* No errors! Assume that Sun nfsacls are supported */ - server->caps |= NFS_CAP_ACLS; - return; - -out_noacl: - server->caps &= ~NFS_CAP_ACLS; -} -#else -static inline void nfs_init_server_aclclient(struct nfs_server *server) -{ - server->flags &= ~NFS_MOUNT_NOACL; - server->caps &= ~NFS_CAP_ACLS; -} -#endif - -/* * Create a general RPC client */ -static int nfs_init_server_rpcclient(struct nfs_server *server, +int nfs_init_server_rpcclient(struct nfs_server *server, const struct rpc_timeout *timeo, rpc_authflavor_t pseudoflavour) { struct nfs_client *clp = server->nfs_client; - server->client = rpc_clone_client(clp->cl_rpcclient); + server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, + pseudoflavour); if (IS_ERR(server->client)) { dprintk("%s: couldn't create rpc_client!\n", __func__); return PTR_ERR(server->client); @@ -733,67 +681,67 @@ static int nfs_init_server_rpcclient(struct nfs_server *server, timeo, sizeof(server->client->cl_timeout_default)); server->client->cl_timeout = &server->client->cl_timeout_default; - - if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { - struct rpc_auth *auth; - - auth = rpcauth_create(pseudoflavour, server->client); - if (IS_ERR(auth)) { - dprintk("%s: couldn't create credcache!\n", __func__); - return PTR_ERR(auth); - } - } server->client->cl_softrtry = 0; if (server->flags & NFS_MOUNT_SOFT) server->client->cl_softrtry = 1; return 0; } +EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); -/* - * Initialise an NFS2 or NFS3 client +/** + * nfs_init_client - Initialise an NFS2 or NFS3 client + * + * @clp: nfs_client to initialise + * @timeparms: timeout parameters for underlying RPC transport + * @ip_addr: IP presentation address (not used) + * + * Returns pointer to an NFS client, or an ERR_PTR value. */ -static int nfs_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const struct nfs_parsed_mount_data *data) +struct nfs_client *nfs_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr) { int error; if (clp->cl_cons_state == NFS_CS_READY) { /* the client is already initialised */ dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); - return 0; + return clp; } /* * Create a client RPC handle for doing FSSTAT with UNIX auth only * - RFC 2623, sec 2.3.2 */ - error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, - 0, data->flags & NFS_MOUNT_NORESVPORT); + error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); if (error < 0) goto error; nfs_mark_client_ready(clp, NFS_CS_READY); - return 0; + return clp; error: nfs_mark_client_ready(clp, error); + nfs_put_client(clp); dprintk("<-- nfs_init_client() = xerror %d\n", error); - return error; + return ERR_PTR(error); } +EXPORT_SYMBOL_GPL(nfs_init_client); /* * Create a version 2 or 3 client */ static int nfs_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data) + const struct nfs_parsed_mount_data *data, + struct nfs_subversion *nfs_mod) { struct nfs_client_initdata cl_init = { .hostname = data->nfs_server.hostname, .addr = (const struct sockaddr *)&data->nfs_server.address, .addrlen = data->nfs_server.addrlen, - .rpc_ops = &nfs_v2_clientops, + .nfs_mod = nfs_mod, .proto = data->nfs_server.protocol, + .net = data->net, }; struct rpc_timeout timeparms; struct nfs_client *clp; @@ -801,24 +749,18 @@ static int nfs_init_server(struct nfs_server *server, dprintk("--> nfs_init_server()\n"); -#ifdef CONFIG_NFS_V3 - if (data->version == 3) - cl_init.rpc_ops = &nfs_v3_clientops; -#endif + nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, + data->timeo, data->retrans); + if (data->flags & NFS_MOUNT_NORESVPORT) + set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); /* Allocate or find a client reference we can use */ - clp = nfs_get_client(&cl_init); + clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); if (IS_ERR(clp)) { dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); return PTR_ERR(clp); } - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); - error = nfs_init_client(clp, &timeparms, data); - if (error < 0) - goto error; - server->nfs_client = clp; /* Initialise the client representation from the mount data */ @@ -826,7 +768,7 @@ static int nfs_init_server(struct nfs_server *server, server->options = data->options; server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| - NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; + NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; if (data->rsize) server->rsize = nfs_block_size(data->rsize, NULL); @@ -844,8 +786,10 @@ static int nfs_init_server(struct nfs_server *server, goto error; server->port = data->nfs_server.port; + server->auth_info = data->auth_info; - error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); + error = nfs_init_server_rpcclient(server, &timeparms, + data->selected_flavor); if (error < 0) goto error; @@ -860,8 +804,6 @@ static int nfs_init_server(struct nfs_server *server, server->mountd_protocol = data->mount_server.protocol; server->namelen = data->namlen; - /* Create a client RPC handle for the NFSv3 ACL management interface */ - nfs_init_server_aclclient(server); dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); return 0; @@ -875,7 +817,9 @@ error: /* * Load up the server record from information gained in an fsinfo record */ -static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) +static void nfs_server_set_fsinfo(struct nfs_server *server, + struct nfs_fh *mntfh, + struct nfs_fsinfo *fsinfo) { unsigned long max_rpc_payload; @@ -905,7 +849,6 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo * if (server->wsize > NFS_MAX_FILE_IO_SIZE) server->wsize = NFS_MAX_FILE_IO_SIZE; server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - set_pnfs_layoutdriver(server, fsinfo->layouttype); server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); @@ -931,7 +874,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo * /* * Probe filesystem information, including the FSID on v2/v3 */ -static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) +int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) { struct nfs_fsinfo fsinfo; struct nfs_client *clp = server->nfs_client; @@ -951,7 +894,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str if (error < 0) goto out_error; - nfs_server_set_fsinfo(server, &fsinfo); + nfs_server_set_fsinfo(server, mntfh, &fsinfo); /* Get some general file system info */ if (server->namelen == 0) { @@ -971,11 +914,12 @@ out_error: dprintk("nfs_probe_fsinfo: error = %d\n", -error); return error; } +EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); /* * Copy useful information when duplicating a server record */ -static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) +void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) { target->flags = source->flags; target->rsize = source->rsize; @@ -986,12 +930,47 @@ static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_serve target->acdirmax = source->acdirmax; target->caps = source->caps; target->options = source->options; + target->auth_info = source->auth_info; } +EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); + +void nfs_server_insert_lists(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + + spin_lock(&nn->nfs_client_lock); + list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); + list_add_tail(&server->master_link, &nn->nfs_volume_list); + clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); + spin_unlock(&nn->nfs_client_lock); + +} +EXPORT_SYMBOL_GPL(nfs_server_insert_lists); + +void nfs_server_remove_lists(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs_net *nn; + + if (clp == NULL) + return; + nn = net_generic(clp->cl_net, nfs_net_id); + spin_lock(&nn->nfs_client_lock); + list_del_rcu(&server->client_link); + if (list_empty(&clp->cl_superblocks)) + set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); + list_del(&server->master_link); + spin_unlock(&nn->nfs_client_lock); + + synchronize_rcu(); +} +EXPORT_SYMBOL_GPL(nfs_server_remove_lists); /* * Allocate and initialise a server record */ -static struct nfs_server *nfs_alloc_server(void) +struct nfs_server *nfs_alloc_server(void) { struct nfs_server *server; @@ -1004,6 +983,9 @@ static struct nfs_server *nfs_alloc_server(void) /* Zero out the NFS state stuff */ INIT_LIST_HEAD(&server->client_link); INIT_LIST_HEAD(&server->master_link); + INIT_LIST_HEAD(&server->delegations); + INIT_LIST_HEAD(&server->layouts); + INIT_LIST_HEAD(&server->state_owners_lru); atomic_set(&server->active, 0); @@ -1019,8 +1001,13 @@ static struct nfs_server *nfs_alloc_server(void) return NULL; } + ida_init(&server->openowner_id); + ida_init(&server->lockowner_id); + pnfs_init_server(server); + return server; } +EXPORT_SYMBOL_GPL(nfs_alloc_server); /* * Free up a server record @@ -1029,11 +1016,7 @@ void nfs_free_server(struct nfs_server *server) { dprintk("--> nfs_free_server()\n"); - unset_pnfs_layoutdriver(server); - spin_lock(&nfs_client_lock); - list_del(&server->client_link); - list_del(&server->master_link); - spin_unlock(&nfs_client_lock); + nfs_server_remove_lists(server); if (server->destroy != NULL) server->destroy(server); @@ -1045,19 +1028,22 @@ void nfs_free_server(struct nfs_server *server) nfs_put_client(server->nfs_client); + ida_destroy(&server->lockowner_id); + ida_destroy(&server->openowner_id); nfs_free_iostats(server->io_stats); bdi_destroy(&server->backing_dev_info); kfree(server); nfs_release_automount_timer(); dprintk("<-- nfs_free_server()\n"); } +EXPORT_SYMBOL_GPL(nfs_free_server); /* * Create a version 2 or 3 volume record * - keyed on server and FSID */ -struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, - struct nfs_fh *mntfh) +struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) { struct nfs_server *server; struct nfs_fattr *fattr; @@ -1073,22 +1059,18 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, goto error; /* Get a client representation */ - error = nfs_init_server(server, data); + error = nfs_init_server(server, mount_info->parsed, nfs_mod); if (error < 0) goto error; - BUG_ON(!server->nfs_client); - BUG_ON(!server->nfs_client->rpc_ops); - BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); - /* Probe the root fh to retrieve its FSID */ - error = nfs_probe_fsinfo(server, mntfh, fattr); + error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); if (error < 0) goto error; if (server->nfs_client->rpc_ops->version == 3) { if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) server->namelen = NFS3_MAXNAMLEN; - if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) + if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) server->caps |= NFS_CAP_READDIRPLUS; } else { if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) @@ -1096,7 +1078,7 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, } if (!(fattr->valid & NFS_ATTR_FATTR)) { - error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); + error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr, NULL); if (error < 0) { dprintk("nfs_create_server: getattr error = %d\n", -error); goto error; @@ -1108,11 +1090,7 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, (unsigned long long) server->fsid.major, (unsigned long long) server->fsid.minor); - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr); return server; @@ -1122,386 +1100,15 @@ error: nfs_free_server(server); return ERR_PTR(error); } - -#ifdef CONFIG_NFS_V4 -/* - * Initialize the NFS4 callback service - */ -static int nfs4_init_callback(struct nfs_client *clp) -{ - int error; - - if (clp->rpc_ops->version == 4) { - if (nfs4_has_session(clp)) { - error = xprt_setup_backchannel( - clp->cl_rpcclient->cl_xprt, - NFS41_BC_MIN_CALLBACKS); - if (error < 0) - return error; - } - - error = nfs_callback_up(clp->cl_mvops->minor_version, - clp->cl_rpcclient->cl_xprt); - if (error < 0) { - dprintk("%s: failed to start callback. Error = %d\n", - __func__, error); - return error; - } - __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); - } - return 0; -} - -/* - * Initialize the minor version specific parts of an NFS4 client record - */ -static int nfs4_init_client_minor_version(struct nfs_client *clp) -{ -#if defined(CONFIG_NFS_V4_1) - if (clp->cl_mvops->minor_version) { - struct nfs4_session *session = NULL; - /* - * Create the session and mark it expired. - * When a SEQUENCE operation encounters the expired session - * it will do session recovery to initialize it. - */ - session = nfs4_alloc_session(clp); - if (!session) - return -ENOMEM; - - clp->cl_session = session; - /* - * The create session reply races with the server back - * channel probe. Mark the client NFS_CS_SESSION_INITING - * so that the client back channel can find the - * nfs_client struct - */ - clp->cl_cons_state = NFS_CS_SESSION_INITING; - } -#endif /* CONFIG_NFS_V4_1 */ - - return nfs4_init_callback(clp); -} - -/* - * Initialise an NFS4 client record - */ -static int nfs4_init_client(struct nfs_client *clp, - const struct rpc_timeout *timeparms, - const char *ip_addr, - rpc_authflavor_t authflavour, - int flags) -{ - int error; - - if (clp->cl_cons_state == NFS_CS_READY) { - /* the client is initialised already */ - dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); - return 0; - } - - /* Check NFS protocol revision and initialize RPC op vector */ - clp->rpc_ops = &nfs_v4_clientops; - - error = nfs_create_rpc_client(clp, timeparms, authflavour, - 1, flags & NFS_MOUNT_NORESVPORT); - if (error < 0) - goto error; - strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); - - error = nfs_idmap_new(clp); - if (error < 0) { - dprintk("%s: failed to create idmapper. Error = %d\n", - __func__, error); - goto error; - } - __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); - - error = nfs4_init_client_minor_version(clp); - if (error < 0) - goto error; - - if (!nfs4_has_session(clp)) - nfs_mark_client_ready(clp, NFS_CS_READY); - return 0; - -error: - nfs_mark_client_ready(clp, error); - dprintk("<-- nfs4_init_client() = xerror %d\n", error); - return error; -} - -/* - * Set up an NFS4 client - */ -static int nfs4_set_client(struct nfs_server *server, - const char *hostname, - const struct sockaddr *addr, - const size_t addrlen, - const char *ip_addr, - rpc_authflavor_t authflavour, - int proto, const struct rpc_timeout *timeparms, - u32 minorversion) -{ - struct nfs_client_initdata cl_init = { - .hostname = hostname, - .addr = addr, - .addrlen = addrlen, - .rpc_ops = &nfs_v4_clientops, - .proto = proto, - .minorversion = minorversion, - }; - struct nfs_client *clp; - int error; - - dprintk("--> nfs4_set_client()\n"); - - /* Allocate or find a client reference we can use */ - clp = nfs_get_client(&cl_init); - if (IS_ERR(clp)) { - error = PTR_ERR(clp); - goto error; - } - error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, - server->flags); - if (error < 0) - goto error_put; - - server->nfs_client = clp; - dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); - return 0; - -error_put: - nfs_put_client(clp); -error: - dprintk("<-- nfs4_set_client() = xerror %d\n", error); - return error; -} - - -/* - * Session has been established, and the client marked ready. - * Set the mount rsize and wsize with negotiated fore channel - * attributes which will be bound checked in nfs_server_set_fsinfo. - */ -static void nfs4_session_set_rwsize(struct nfs_server *server) -{ -#ifdef CONFIG_NFS_V4_1 - struct nfs4_session *sess; - u32 server_resp_sz; - u32 server_rqst_sz; - - if (!nfs4_has_session(server->nfs_client)) - return; - sess = server->nfs_client->cl_session; - server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; - server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; - - if (server->rsize > server_resp_sz) - server->rsize = server_resp_sz; - if (server->wsize > server_rqst_sz) - server->wsize = server_rqst_sz; -#endif /* CONFIG_NFS_V4_1 */ -} - -static int nfs4_server_common_setup(struct nfs_server *server, - struct nfs_fh *mntfh) -{ - struct nfs_fattr *fattr; - int error; - - BUG_ON(!server->nfs_client); - BUG_ON(!server->nfs_client->rpc_ops); - BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); - - fattr = nfs_alloc_fattr(); - if (fattr == NULL) - return -ENOMEM; - - /* We must ensure the session is initialised first */ - error = nfs4_init_session(server); - if (error < 0) - goto out; - - /* Probe the root fh to retrieve its FSID and filehandle */ - error = nfs4_get_rootfh(server, mntfh); - if (error < 0) - goto out; - - dprintk("Server FSID: %llx:%llx\n", - (unsigned long long) server->fsid.major, - (unsigned long long) server->fsid.minor); - dprintk("Mount FH: %d\n", mntfh->size); - - nfs4_session_set_rwsize(server); - - error = nfs_probe_fsinfo(server, mntfh, fattr); - if (error < 0) - goto out; - - if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) - server->namelen = NFS4_MAXNAMLEN; - - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - - server->mount_time = jiffies; -out: - nfs_free_fattr(fattr); - return error; -} - -/* - * Create a version 4 volume record - */ -static int nfs4_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data) -{ - struct rpc_timeout timeparms; - int error; - - dprintk("--> nfs4_init_server()\n"); - - nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, - data->timeo, data->retrans); - - /* Initialise the client representation from the mount data */ - server->flags = data->flags; - server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; - if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) - server->caps |= NFS_CAP_READDIRPLUS; - server->options = data->options; - - /* Get a client record */ - error = nfs4_set_client(server, - data->nfs_server.hostname, - (const struct sockaddr *)&data->nfs_server.address, - data->nfs_server.addrlen, - data->client_address, - data->auth_flavors[0], - data->nfs_server.protocol, - &timeparms, - data->minorversion); - if (error < 0) - goto error; - - if (data->rsize) - server->rsize = nfs_block_size(data->rsize, NULL); - if (data->wsize) - server->wsize = nfs_block_size(data->wsize, NULL); - - server->acregmin = data->acregmin * HZ; - server->acregmax = data->acregmax * HZ; - server->acdirmin = data->acdirmin * HZ; - server->acdirmax = data->acdirmax * HZ; - - server->port = data->nfs_server.port; - - error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); - -error: - /* Done */ - dprintk("<-- nfs4_init_server() = %d\n", error); - return error; -} - -/* - * Create a version 4 volume record - * - keyed on server and FSID - */ -struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, - struct nfs_fh *mntfh) -{ - struct nfs_server *server; - int error; - - dprintk("--> nfs4_create_server()\n"); - - server = nfs_alloc_server(); - if (!server) - return ERR_PTR(-ENOMEM); - - /* set up the general RPC client */ - error = nfs4_init_server(server, data); - if (error < 0) - goto error; - - error = nfs4_server_common_setup(server, mntfh); - if (error < 0) - goto error; - - dprintk("<-- nfs4_create_server() = %p\n", server); - return server; - -error: - nfs_free_server(server); - dprintk("<-- nfs4_create_server() = error %d\n", error); - return ERR_PTR(error); -} - -/* - * Create an NFS4 referral server record - */ -struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, - struct nfs_fh *mntfh) -{ - struct nfs_client *parent_client; - struct nfs_server *server, *parent_server; - int error; - - dprintk("--> nfs4_create_referral_server()\n"); - - server = nfs_alloc_server(); - if (!server) - return ERR_PTR(-ENOMEM); - - parent_server = NFS_SB(data->sb); - parent_client = parent_server->nfs_client; - - /* Initialise the client representation from the parent server */ - nfs_server_copy_userdata(server, parent_server); - server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; - - /* Get a client representation. - * Note: NFSv4 always uses TCP, */ - error = nfs4_set_client(server, data->hostname, - data->addr, - data->addrlen, - parent_client->cl_ipaddr, - data->authflavor, - parent_server->client->cl_xprt->prot, - parent_server->client->cl_timeout, - parent_client->cl_mvops->minor_version); - if (error < 0) - goto error; - - error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); - if (error < 0) - goto error; - - error = nfs4_server_common_setup(server, mntfh); - if (error < 0) - goto error; - - dprintk("<-- nfs_create_referral_server() = %p\n", server); - return server; - -error: - nfs_free_server(server); - dprintk("<-- nfs4_create_referral_server() = error %d\n", error); - return ERR_PTR(error); -} - -#endif /* CONFIG_NFS_V4 */ +EXPORT_SYMBOL_GPL(nfs_create_server); /* * Clone an NFS2, NFS3 or NFS4 server record */ struct nfs_server *nfs_clone_server(struct nfs_server *source, struct nfs_fh *fh, - struct nfs_fattr *fattr) + struct nfs_fattr *fattr, + rpc_authflavor_t flavor) { struct nfs_server *server; struct nfs_fattr *fattr_fsinfo; @@ -1522,6 +1129,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, /* Copy data from the source */ server->nfs_client = source->nfs_client; + server->destroy = source->destroy; atomic_inc(&server->nfs_client->cl_count); nfs_server_copy_userdata(server, source); @@ -1529,11 +1137,9 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, error = nfs_init_server_rpcclient(server, source->client->cl_timeout, - source->client->cl_auth->au_flavor); + flavor); if (error < 0) goto out_free_server; - if (!IS_ERR(source->client_acl)) - nfs_init_server_aclclient(server); /* probe the filesystem info for this server filesystem */ error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); @@ -1551,11 +1157,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, if (error < 0) goto out_free_server; - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr_fsinfo); @@ -1568,6 +1170,20 @@ out_free_server: dprintk("<-- nfs_clone_server() = error %d\n", error); return ERR_PTR(error); } +EXPORT_SYMBOL_GPL(nfs_clone_server); + +void nfs_clients_init(struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + + INIT_LIST_HEAD(&nn->nfs_client_list); + INIT_LIST_HEAD(&nn->nfs_volume_list); +#if IS_ENABLED(CONFIG_NFS_V4) + idr_init(&nn->cb_ident_idr); +#endif + spin_lock_init(&nn->nfs_client_lock); + nn->boot_time = CURRENT_TIME; +} #ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_fs_nfs; @@ -1622,13 +1238,15 @@ static int nfs_server_list_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; + struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; + struct net *net = pid_ns->child_reaper->nsproxy->net_ns; ret = seq_open(file, &nfs_server_list_ops); if (ret < 0) return ret; m = file->private_data; - m->private = PDE(inode)->data; + m->private = net; return 0; } @@ -1638,9 +1256,11 @@ static int nfs_server_list_open(struct inode *inode, struct file *file) */ static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) { + struct nfs_net *nn = net_generic(m->private, nfs_net_id); + /* lock the list against modification */ - spin_lock(&nfs_client_lock); - return seq_list_start_head(&nfs_client_list, *_pos); + spin_lock(&nn->nfs_client_lock); + return seq_list_start_head(&nn->nfs_client_list, *_pos); } /* @@ -1648,7 +1268,9 @@ static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) */ static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) { - return seq_list_next(v, &nfs_client_list, pos); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + return seq_list_next(v, &nn->nfs_client_list, pos); } /* @@ -1656,7 +1278,9 @@ static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) */ static void nfs_server_list_stop(struct seq_file *p, void *v) { - spin_unlock(&nfs_client_lock); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + spin_unlock(&nn->nfs_client_lock); } /* @@ -1665,9 +1289,10 @@ static void nfs_server_list_stop(struct seq_file *p, void *v) static int nfs_server_list_show(struct seq_file *m, void *v) { struct nfs_client *clp; + struct nfs_net *nn = net_generic(m->private, nfs_net_id); /* display header on line 1 */ - if (v == &nfs_client_list) { + if (v == &nn->nfs_client_list) { seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); return 0; } @@ -1675,12 +1300,18 @@ static int nfs_server_list_show(struct seq_file *m, void *v) /* display one transport per line on subsequent lines */ clp = list_entry(v, struct nfs_client, cl_share_link); + /* Check if the client is initialized */ + if (clp->cl_cons_state != NFS_CS_READY) + return 0; + + rcu_read_lock(); seq_printf(m, "v%u %s %s %3d %s\n", clp->rpc_ops->version, rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), atomic_read(&clp->cl_count), clp->cl_hostname); + rcu_read_unlock(); return 0; } @@ -1692,13 +1323,15 @@ static int nfs_volume_list_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; + struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; + struct net *net = pid_ns->child_reaper->nsproxy->net_ns; ret = seq_open(file, &nfs_volume_list_ops); if (ret < 0) return ret; m = file->private_data; - m->private = PDE(inode)->data; + m->private = net; return 0; } @@ -1708,9 +1341,11 @@ static int nfs_volume_list_open(struct inode *inode, struct file *file) */ static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) { + struct nfs_net *nn = net_generic(m->private, nfs_net_id); + /* lock the list against modification */ - spin_lock(&nfs_client_lock); - return seq_list_start_head(&nfs_volume_list, *_pos); + spin_lock(&nn->nfs_client_lock); + return seq_list_start_head(&nn->nfs_volume_list, *_pos); } /* @@ -1718,7 +1353,9 @@ static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) */ static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) { - return seq_list_next(v, &nfs_volume_list, pos); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + return seq_list_next(v, &nn->nfs_volume_list, pos); } /* @@ -1726,7 +1363,9 @@ static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) */ static void nfs_volume_list_stop(struct seq_file *p, void *v) { - spin_unlock(&nfs_client_lock); + struct nfs_net *nn = net_generic(p->private, nfs_net_id); + + spin_unlock(&nn->nfs_client_lock); } /* @@ -1737,9 +1376,10 @@ static int nfs_volume_list_show(struct seq_file *m, void *v) struct nfs_server *server; struct nfs_client *clp; char dev[8], fsid[17]; + struct nfs_net *nn = net_generic(m->private, nfs_net_id); /* display header on line 1 */ - if (v == &nfs_volume_list) { + if (v == &nn->nfs_volume_list) { seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); return 0; } @@ -1754,6 +1394,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v) (unsigned long long) server->fsid.major, (unsigned long long) server->fsid.minor); + rcu_read_lock(); seq_printf(m, "v%u %s %s %-7s %-17s %s\n", clp->rpc_ops->version, rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), @@ -1761,6 +1402,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v) dev, fsid, nfs_server_fscache_state(server)); + rcu_read_unlock(); return 0; } diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 232a7eead33..5d8ccecf5f5 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -11,7 +11,6 @@ #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/spinlock.h> #include <linux/nfs4.h> @@ -21,32 +20,35 @@ #include "nfs4_fs.h" #include "delegation.h" #include "internal.h" - -static void nfs_do_free_delegation(struct nfs_delegation *delegation) -{ - if (delegation->cred) - put_rpccred(delegation->cred); - kfree(delegation); -} - -static void nfs_free_delegation_callback(struct rcu_head *head) -{ - struct nfs_delegation *delegation = container_of(head, struct nfs_delegation, rcu); - - nfs_do_free_delegation(delegation); -} +#include "nfs4trace.h" static void nfs_free_delegation(struct nfs_delegation *delegation) { - call_rcu(&delegation->rcu, nfs_free_delegation_callback); + if (delegation->cred) { + put_rpccred(delegation->cred); + delegation->cred = NULL; + } + kfree_rcu(delegation, rcu); } +/** + * nfs_mark_delegation_referenced - set delegation's REFERENCED flag + * @delegation: delegation to process + * + */ void nfs_mark_delegation_referenced(struct nfs_delegation *delegation) { set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags); } -int nfs_have_delegation(struct inode *inode, fmode_t flags) +/** + * nfs_have_delegation - check if inode has a delegation + * @inode: inode to check + * @flags: delegation types to check for + * + * Returns one if inode has the indicated delegation, otherwise zero. + */ +int nfs4_have_delegation(struct inode *inode, fmode_t flags) { struct nfs_delegation *delegation; int ret = 0; @@ -54,7 +56,8 @@ int nfs_have_delegation(struct inode *inode, fmode_t flags) flags &= FMODE_READ|FMODE_WRITE; rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); - if (delegation != NULL && (delegation->type & flags) == flags) { + if (delegation != NULL && (delegation->type & flags) == flags && + !test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { nfs_mark_delegation_referenced(delegation); ret = 1; } @@ -62,7 +65,7 @@ int nfs_have_delegation(struct inode *inode, fmode_t flags) return ret; } -static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state) +static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) { struct inode *inode = state->inode; struct file_lock *fl; @@ -71,20 +74,20 @@ static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_ if (inode->i_flock == NULL) goto out; - /* Protect inode->i_flock using the file locks lock */ - lock_flocks(); + /* Protect inode->i_flock using the i_lock */ + spin_lock(&inode->i_lock); for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) continue; if (nfs_file_open_context(fl->fl_file) != ctx) continue; - unlock_flocks(); - status = nfs4_lock_delegation_recall(state, fl); + spin_unlock(&inode->i_lock); + status = nfs4_lock_delegation_recall(fl, state, stateid); if (status < 0) goto out; - lock_flocks(); + spin_lock(&inode->i_lock); } - unlock_flocks(); + spin_unlock(&inode->i_lock); out: return status; } @@ -93,7 +96,9 @@ static int nfs_delegation_claim_opens(struct inode *inode, const nfs4_stateid *s { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_open_context *ctx; + struct nfs4_state_owner *sp; struct nfs4_state *state; + unsigned int seq; int err; again: @@ -104,13 +109,20 @@ again: continue; if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) continue; - if (memcmp(state->stateid.data, stateid->data, sizeof(state->stateid.data)) != 0) + if (!nfs4_stateid_match(&state->stateid, stateid)) continue; get_nfs_open_context(ctx); spin_unlock(&inode->i_lock); + sp = state->owner; + /* Block nfs4_proc_unlck */ + mutex_lock(&sp->so_delegreturn_mutex); + seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); err = nfs4_open_delegation_recall(ctx, state, stateid); - if (err >= 0) - err = nfs_delegation_claim_locks(ctx, state); + if (!err) + err = nfs_delegation_claim_locks(ctx, state, stateid); + if (!err && read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) + err = -EAGAIN; + mutex_unlock(&sp->so_delegreturn_mutex); put_nfs_open_context(ctx); if (err != 0) return err; @@ -120,10 +132,15 @@ again: return 0; } -/* - * Set up a delegation on an inode +/** + * nfs_inode_reclaim_delegation - process a delegation reclaim request + * @inode: inode to process + * @cred: credential to use for request + * @res: new delegation state from server + * */ -void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) +void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, + struct nfs_openres *res) { struct nfs_delegation *delegation; struct rpc_cred *oldcred = NULL; @@ -133,8 +150,7 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, st if (delegation != NULL) { spin_lock(&delegation->lock); if (delegation->inode != NULL) { - memcpy(delegation->stateid.data, res->delegation.data, - sizeof(delegation->stateid.data)); + nfs4_stateid_copy(&delegation->stateid, &res->delegation); delegation->type = res->delegation_type; delegation->maxsize = res->maxsize; oldcred = delegation->cred; @@ -145,6 +161,7 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, st spin_unlock(&delegation->lock); put_rpccred(oldcred); rcu_read_unlock(); + trace_nfs4_reclaim_delegation(inode, res->delegation_type); } else { /* We appear to have raced with a delegation return. */ spin_unlock(&delegation->lock); @@ -176,38 +193,104 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation return inode; } -static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi, - const nfs4_stateid *stateid, - struct nfs_client *clp) +static struct nfs_delegation * +nfs_start_delegation_return_locked(struct nfs_inode *nfsi) { - struct nfs_delegation *delegation = - rcu_dereference_protected(nfsi->delegation, - lockdep_is_held(&clp->cl_lock)); + struct nfs_delegation *ret = NULL; + struct nfs_delegation *delegation = rcu_dereference(nfsi->delegation); if (delegation == NULL) - goto nomatch; + goto out; + spin_lock(&delegation->lock); + if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) + ret = delegation; + spin_unlock(&delegation->lock); +out: + return ret; +} + +static struct nfs_delegation * +nfs_start_delegation_return(struct nfs_inode *nfsi) +{ + struct nfs_delegation *delegation; + + rcu_read_lock(); + delegation = nfs_start_delegation_return_locked(nfsi); + rcu_read_unlock(); + return delegation; +} + +static void +nfs_abort_delegation_return(struct nfs_delegation *delegation, + struct nfs_client *clp) +{ + spin_lock(&delegation->lock); - if (stateid != NULL && memcmp(delegation->stateid.data, stateid->data, - sizeof(delegation->stateid.data)) != 0) - goto nomatch_unlock; + clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); + set_bit(NFS_DELEGATION_RETURN, &delegation->flags); + spin_unlock(&delegation->lock); + set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); +} + +static struct nfs_delegation * +nfs_detach_delegation_locked(struct nfs_inode *nfsi, + struct nfs_delegation *delegation, + struct nfs_client *clp) +{ + struct nfs_delegation *deleg_cur = + rcu_dereference_protected(nfsi->delegation, + lockdep_is_held(&clp->cl_lock)); + + if (deleg_cur == NULL || delegation != deleg_cur) + return NULL; + + spin_lock(&delegation->lock); + set_bit(NFS_DELEGATION_RETURNING, &delegation->flags); list_del_rcu(&delegation->super_list); delegation->inode = NULL; nfsi->delegation_state = 0; rcu_assign_pointer(nfsi->delegation, NULL); spin_unlock(&delegation->lock); return delegation; -nomatch_unlock: - spin_unlock(&delegation->lock); -nomatch: - return NULL; } -/* - * Set up a delegation on an inode +static struct nfs_delegation *nfs_detach_delegation(struct nfs_inode *nfsi, + struct nfs_delegation *delegation, + struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + + spin_lock(&clp->cl_lock); + delegation = nfs_detach_delegation_locked(nfsi, delegation, clp); + spin_unlock(&clp->cl_lock); + return delegation; +} + +static struct nfs_delegation * +nfs_inode_detach_delegation(struct inode *inode) +{ + struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_delegation *delegation; + + delegation = nfs_start_delegation_return(nfsi); + if (delegation == NULL) + return NULL; + return nfs_detach_delegation(nfsi, delegation, server); +} + +/** + * nfs_inode_set_delegation - set up a delegation on an inode + * @inode: inode to which delegation applies + * @cred: cred to use for subsequent delegation processing + * @res: new delegation state from server + * + * Returns zero on success, or a negative errno value. */ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = server->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation, *old_delegation; struct nfs_delegation *freeme = NULL; @@ -216,11 +299,10 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct delegation = kmalloc(sizeof(*delegation), GFP_NOFS); if (delegation == NULL) return -ENOMEM; - memcpy(delegation->stateid.data, res->delegation.data, - sizeof(delegation->stateid.data)); + nfs4_stateid_copy(&delegation->stateid, &res->delegation); delegation->type = res->delegation_type; delegation->maxsize = res->maxsize; - delegation->change_attr = nfsi->change_attr; + delegation->change_attr = inode->i_version; delegation->cred = get_rpccred(cred); delegation->inode = inode; delegation->flags = 1<<NFS_DELEGATION_REFERENCED; @@ -228,28 +310,34 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct spin_lock(&clp->cl_lock); old_delegation = rcu_dereference_protected(nfsi->delegation, - lockdep_is_held(&clp->cl_lock)); + lockdep_is_held(&clp->cl_lock)); if (old_delegation != NULL) { - if (memcmp(&delegation->stateid, &old_delegation->stateid, - sizeof(old_delegation->stateid)) == 0 && + if (nfs4_stateid_match(&delegation->stateid, + &old_delegation->stateid) && delegation->type == old_delegation->type) { goto out; } /* * Deal with broken servers that hand out two * delegations for the same file. + * Allow for upgrades to a WRITE delegation, but + * nothing else. */ dfprintk(FILE, "%s: server %s handed out " "a duplicate delegation!\n", __func__, clp->cl_hostname); - if (delegation->type <= old_delegation->type) { + if (delegation->type == old_delegation->type || + !(delegation->type & FMODE_WRITE)) { freeme = delegation; delegation = NULL; goto out; } - freeme = nfs_detach_delegation_locked(nfsi, NULL, clp); + freeme = nfs_detach_delegation_locked(nfsi, + old_delegation, clp); + if (freeme == NULL) + goto out; } - list_add_rcu(&delegation->super_list, &clp->cl_delegations); + list_add_rcu(&delegation->super_list, &server->delegations); nfsi->delegation_state = delegation->type; rcu_assign_pointer(nfsi->delegation, delegation); delegation = NULL; @@ -258,6 +346,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct spin_lock(&inode->i_lock); nfsi->cache_validity |= NFS_INO_REVAL_FORCED; spin_unlock(&inode->i_lock); + trace_nfs4_set_delegation(inode, res->delegation_type); out: spin_unlock(&clp->cl_lock); @@ -271,19 +360,29 @@ out: /* * Basic procedure for returning a delegation to the server */ -static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync) +static int nfs_end_delegation_return(struct inode *inode, struct nfs_delegation *delegation, int issync) { + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); int err; - /* - * Guard against new delegated open/lock/unlock calls and against - * state recovery - */ - down_write(&nfsi->rwsem); - err = nfs_delegation_claim_opens(inode, &delegation->stateid); - up_write(&nfsi->rwsem); - if (err) + if (delegation == NULL) + return 0; + do { + err = nfs_delegation_claim_opens(inode, &delegation->stateid); + if (!issync || err != -EAGAIN) + break; + /* + * Guard against state recovery + */ + err = nfs4_wait_clnt_recover(clp); + } while (err == 0); + + if (err) { + nfs_abort_delegation_return(delegation, clp); + goto out; + } + if (!nfs_detach_delegation(nfsi, delegation, NFS_SERVER(inode))) goto out; err = nfs_do_return_delegation(inode, delegation, issync); @@ -291,206 +390,298 @@ out: return err; } -/* - * Return all delegations that have been marked for return +static bool nfs_delegation_need_return(struct nfs_delegation *delegation) +{ + bool ret = false; + + if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags)) + ret = true; + if (test_and_clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags) && !ret) { + struct inode *inode; + + spin_lock(&delegation->lock); + inode = delegation->inode; + if (inode && list_empty(&NFS_I(inode)->open_files)) + ret = true; + spin_unlock(&delegation->lock); + } + return ret; +} + +/** + * nfs_client_return_marked_delegations - return previously marked delegations + * @clp: nfs_client to process + * + * Note that this function is designed to be called by the state + * manager thread. For this reason, it cannot flush the dirty data, + * since that could deadlock in case of a state recovery error. + * + * Returns zero on success, or a negative errno value. */ int nfs_client_return_marked_delegations(struct nfs_client *clp) { struct nfs_delegation *delegation; + struct nfs_server *server; struct inode *inode; int err = 0; restart: rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { - if (!test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags)) - continue; - inode = nfs_delegation_grab_inode(delegation); - if (inode == NULL) - continue; - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); - spin_unlock(&clp->cl_lock); - rcu_read_unlock(); - if (delegation != NULL) { - filemap_flush(inode->i_mapping); - err = __nfs_inode_return_delegation(inode, delegation, 0); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + list_for_each_entry_rcu(delegation, &server->delegations, + super_list) { + if (!nfs_delegation_need_return(delegation)) + continue; + inode = nfs_delegation_grab_inode(delegation); + if (inode == NULL) + continue; + delegation = nfs_start_delegation_return_locked(NFS_I(inode)); + rcu_read_unlock(); + + err = nfs_end_delegation_return(inode, delegation, 0); + iput(inode); + if (!err) + goto restart; + set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); + return err; } - iput(inode); - if (!err) - goto restart; - set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); - return err; } rcu_read_unlock(); return 0; } -/* - * This function returns the delegation without reclaiming opens - * or protecting against delegation reclaims. - * It is therefore really only safe to be called from - * nfs4_clear_inode() +/** + * nfs_inode_return_delegation_noreclaim - return delegation, don't reclaim opens + * @inode: inode to process + * + * Does not protect against delegation reclaims, therefore really only safe + * to be called from nfs4_clear_inode(). */ void nfs_inode_return_delegation_noreclaim(struct inode *inode) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; - struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; - if (rcu_access_pointer(nfsi->delegation) != NULL) { - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); - spin_unlock(&clp->cl_lock); - if (delegation != NULL) - nfs_do_return_delegation(inode, delegation, 0); - } + delegation = nfs_inode_detach_delegation(inode); + if (delegation != NULL) + nfs_do_return_delegation(inode, delegation, 0); } -int nfs_inode_return_delegation(struct inode *inode) +/** + * nfs_inode_return_delegation - synchronously return a delegation + * @inode: inode to process + * + * This routine will always flush any dirty data to disk on the + * assumption that if we need to return the delegation, then + * we should stop caching. + * + * Returns zero on success, or a negative errno value. + */ +int nfs4_inode_return_delegation(struct inode *inode) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; int err = 0; - if (rcu_access_pointer(nfsi->delegation) != NULL) { - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); - spin_unlock(&clp->cl_lock); - if (delegation != NULL) { - nfs_wb_all(inode); - err = __nfs_inode_return_delegation(inode, delegation, 1); - } - } + nfs_wb_all(inode); + delegation = nfs_start_delegation_return(nfsi); + if (delegation != NULL) + err = nfs_end_delegation_return(inode, delegation, 1); return err; } -static void nfs_mark_return_delegation(struct nfs_client *clp, struct nfs_delegation *delegation) +static void nfs_mark_return_if_closed_delegation(struct nfs_server *server, + struct nfs_delegation *delegation) +{ + set_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); + set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state); +} + +static void nfs_mark_return_delegation(struct nfs_server *server, + struct nfs_delegation *delegation) { set_bit(NFS_DELEGATION_RETURN, &delegation->flags); - set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); + set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state); } -/* - * Return all delegations associated to a super block - */ -void nfs_super_return_all_delegations(struct super_block *sb) +static bool nfs_server_mark_return_all_delegations(struct nfs_server *server) { - struct nfs_client *clp = NFS_SB(sb)->nfs_client; struct nfs_delegation *delegation; + bool ret = false; + + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { + nfs_mark_return_delegation(server, delegation); + ret = true; + } + return ret; +} + +static void nfs_client_mark_return_all_delegations(struct nfs_client *clp) +{ + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_server_mark_return_all_delegations(server); + rcu_read_unlock(); +} + +static void nfs_delegation_run_state_manager(struct nfs_client *clp) +{ + if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) + nfs4_schedule_state_manager(clp); +} + +/** + * nfs_expire_all_delegations + * @clp: client to process + * + */ +void nfs_expire_all_delegations(struct nfs_client *clp) +{ + nfs_client_mark_return_all_delegations(clp); + nfs_delegation_run_state_manager(clp); +} + +/** + * nfs_super_return_all_delegations - return delegations for one superblock + * @sb: sb to process + * + */ +void nfs_server_return_all_delegations(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + bool need_wait; if (clp == NULL) return; + rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { - spin_lock(&delegation->lock); - if (delegation->inode != NULL && delegation->inode->i_sb == sb) - set_bit(NFS_DELEGATION_RETURN, &delegation->flags); - spin_unlock(&delegation->lock); - } + need_wait = nfs_server_mark_return_all_delegations(server); rcu_read_unlock(); - if (nfs_client_return_marked_delegations(clp) != 0) + + if (need_wait) { nfs4_schedule_state_manager(clp); + nfs4_wait_clnt_recover(clp); + } } -static -void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, fmode_t flags) +static void nfs_mark_return_unused_delegation_types(struct nfs_server *server, + fmode_t flags) { struct nfs_delegation *delegation; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE)) continue; if (delegation->type & flags) - nfs_mark_return_delegation(clp, delegation); + nfs_mark_return_if_closed_delegation(server, delegation); } - rcu_read_unlock(); } -static void nfs_client_mark_return_all_delegations(struct nfs_client *clp) +static void nfs_client_mark_return_unused_delegation_types(struct nfs_client *clp, + fmode_t flags) { - nfs_client_mark_return_all_delegation_types(clp, FMODE_READ|FMODE_WRITE); -} + struct nfs_server *server; -static void nfs_delegation_run_state_manager(struct nfs_client *clp) -{ - if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) - nfs4_schedule_state_manager(clp); + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_mark_return_unused_delegation_types(server, flags); + rcu_read_unlock(); } -void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags) +void nfs_remove_bad_delegation(struct inode *inode) { - nfs_client_mark_return_all_delegation_types(clp, flags); - nfs_delegation_run_state_manager(clp); -} + struct nfs_delegation *delegation; -void nfs_expire_all_delegations(struct nfs_client *clp) -{ - nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE); + delegation = nfs_inode_detach_delegation(inode); + if (delegation) { + nfs_inode_find_state_and_recover(inode, &delegation->stateid); + nfs_free_delegation(delegation); + } } +EXPORT_SYMBOL_GPL(nfs_remove_bad_delegation); -/* - * Return all delegations following an NFS4ERR_CB_PATH_DOWN error. +/** + * nfs_expire_unused_delegation_types + * @clp: client to process + * @flags: delegation types to expire + * */ -void nfs_handle_cb_pathdown(struct nfs_client *clp) +void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags) { - if (clp == NULL) - return; - nfs_client_mark_return_all_delegations(clp); + nfs_client_mark_return_unused_delegation_types(clp, flags); + nfs_delegation_run_state_manager(clp); } -static void nfs_client_mark_return_unreferenced_delegations(struct nfs_client *clp) +static void nfs_mark_return_unreferenced_delegations(struct nfs_server *server) { struct nfs_delegation *delegation; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags)) continue; - nfs_mark_return_delegation(clp, delegation); + nfs_mark_return_if_closed_delegation(server, delegation); } - rcu_read_unlock(); } +/** + * nfs_expire_unreferenced_delegations - Eliminate unused delegations + * @clp: nfs_client to process + * + */ void nfs_expire_unreferenced_delegations(struct nfs_client *clp) { - nfs_client_mark_return_unreferenced_delegations(clp); + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_mark_return_unreferenced_delegations(server); + rcu_read_unlock(); + nfs_delegation_run_state_manager(clp); } -/* - * Asynchronous delegation recall! +/** + * nfs_async_inode_return_delegation - asynchronously return a delegation + * @inode: inode to process + * @stateid: state ID information + * + * Returns zero on success, or a negative errno value. */ -int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid) +int nfs_async_inode_return_delegation(struct inode *inode, + const nfs4_stateid *stateid) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = server->nfs_client; struct nfs_delegation *delegation; + filemap_flush(inode->i_mapping); + rcu_read_lock(); delegation = rcu_dereference(NFS_I(inode)->delegation); + if (delegation == NULL) + goto out_enoent; - if (!clp->cl_mvops->validate_stateid(delegation, stateid)) { - rcu_read_unlock(); - return -ENOENT; - } - - nfs_mark_return_delegation(clp, delegation); + if (!clp->cl_mvops->match_stateid(&delegation->stateid, stateid)) + goto out_enoent; + nfs_mark_return_delegation(server, delegation); rcu_read_unlock(); + nfs_delegation_run_state_manager(clp); return 0; +out_enoent: + rcu_read_unlock(); + return -ENOENT; } -/* - * Retrieve the inode associated with a delegation - */ -struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle) +static struct inode * +nfs_delegation_find_inode_server(struct nfs_server *server, + const struct nfs_fh *fhandle) { struct nfs_delegation *delegation; struct inode *res = NULL; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { spin_lock(&delegation->lock); if (delegation->inode != NULL && nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) { @@ -500,60 +691,136 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs if (res != NULL) break; } + return res; +} + +/** + * nfs_delegation_find_inode - retrieve the inode associated with a delegation + * @clp: client state handle + * @fhandle: filehandle from a delegation recall + * + * Returns pointer to inode matching "fhandle," or NULL if a matching inode + * cannot be found. + */ +struct inode *nfs_delegation_find_inode(struct nfs_client *clp, + const struct nfs_fh *fhandle) +{ + struct nfs_server *server; + struct inode *res = NULL; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + res = nfs_delegation_find_inode_server(server, fhandle); + if (res != NULL) + break; + } rcu_read_unlock(); return res; } -/* - * Mark all delegations as needing to be reclaimed +static void nfs_delegation_mark_reclaim_server(struct nfs_server *server) +{ + struct nfs_delegation *delegation; + + list_for_each_entry_rcu(delegation, &server->delegations, super_list) + set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); +} + +/** + * nfs_delegation_mark_reclaim - mark all delegations as needing to be reclaimed + * @clp: nfs_client to process + * */ void nfs_delegation_mark_reclaim(struct nfs_client *clp) { - struct nfs_delegation *delegation; + struct nfs_server *server; + rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) - set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_delegation_mark_reclaim_server(server); rcu_read_unlock(); } -/* - * Reap all unclaimed delegations after reboot recovery is done +/** + * nfs_delegation_reap_unclaimed - reap unclaimed delegations after reboot recovery is done + * @clp: nfs_client to process + * */ void nfs_delegation_reap_unclaimed(struct nfs_client *clp) { struct nfs_delegation *delegation; + struct nfs_server *server; struct inode *inode; + restart: rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { - if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) - continue; - inode = nfs_delegation_grab_inode(delegation); - if (inode == NULL) - continue; - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); - spin_unlock(&clp->cl_lock); - rcu_read_unlock(); - if (delegation != NULL) - nfs_free_delegation(delegation); - iput(inode); - goto restart; + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + list_for_each_entry_rcu(delegation, &server->delegations, + super_list) { + if (test_bit(NFS_DELEGATION_NEED_RECLAIM, + &delegation->flags) == 0) + continue; + inode = nfs_delegation_grab_inode(delegation); + if (inode == NULL) + continue; + delegation = nfs_detach_delegation(NFS_I(inode), + delegation, server); + rcu_read_unlock(); + + if (delegation != NULL) + nfs_free_delegation(delegation); + iput(inode); + goto restart; + } } rcu_read_unlock(); } -int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode) +/** + * nfs_delegations_present - check for existence of delegations + * @clp: client state handle + * + * Returns one if there are any nfs_delegation structures attached + * to this nfs_client. + */ +int nfs_delegations_present(struct nfs_client *clp) +{ + struct nfs_server *server; + int ret = 0; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + if (!list_empty(&server->delegations)) { + ret = 1; + break; + } + rcu_read_unlock(); + return ret; +} + +/** + * nfs4_copy_delegation_stateid - Copy inode's state ID information + * @dst: stateid data structure to fill in + * @inode: inode to check + * @flags: delegation type requirement + * + * Returns "true" and fills in "dst->data" * if inode had a delegation, + * otherwise "false" is returned. + */ +bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, + fmode_t flags) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; - int ret = 0; + bool ret; + flags &= FMODE_READ|FMODE_WRITE; rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); - if (delegation != NULL) { - memcpy(dst->data, delegation->stateid.data, sizeof(dst->data)); - ret = 1; + ret = (delegation != NULL && (delegation->type & flags) == flags); + if (ret) { + nfs4_stateid_copy(dst, &delegation->stateid); + nfs_mark_delegation_referenced(delegation); } rcu_read_unlock(); return ret; diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 2026304bda1..9a79c7a99d6 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -8,7 +8,7 @@ #ifndef FS_NFS_DELEGATION_H #define FS_NFS_DELEGATION_H -#if defined(CONFIG_NFS_V4) +#if IS_ENABLED(CONFIG_NFS_V4) /* * NFSv4 delegation */ @@ -28,22 +28,25 @@ struct nfs_delegation { enum { NFS_DELEGATION_NEED_RECLAIM = 0, NFS_DELEGATION_RETURN, + NFS_DELEGATION_RETURN_IF_CLOSED, NFS_DELEGATION_REFERENCED, + NFS_DELEGATION_RETURNING, }; int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res); -int nfs_inode_return_delegation(struct inode *inode); +int nfs4_inode_return_delegation(struct inode *inode); int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); void nfs_inode_return_delegation_noreclaim(struct inode *inode); struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle); -void nfs_super_return_all_delegations(struct super_block *sb); +void nfs_server_return_all_delegations(struct nfs_server *); void nfs_expire_all_delegations(struct nfs_client *clp); -void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags); +void nfs_expire_unused_delegation_types(struct nfs_client *clp, fmode_t flags); void nfs_expire_unreferenced_delegations(struct nfs_client *clp); -void nfs_handle_cb_pathdown(struct nfs_client *clp); int nfs_client_return_marked_delegations(struct nfs_client *clp); +int nfs_delegations_present(struct nfs_client *clp); +void nfs_remove_bad_delegation(struct inode *inode); void nfs_delegation_mark_reclaim(struct nfs_client *clp); void nfs_delegation_reap_unclaimed(struct nfs_client *clp); @@ -51,27 +54,17 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp); /* NFSv4 delegation-related procedures */ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync); int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid); -int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl); -int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode); +int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid); +bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_t flags); void nfs_mark_delegation_referenced(struct nfs_delegation *delegation); -int nfs_have_delegation(struct inode *inode, fmode_t flags); +int nfs4_have_delegation(struct inode *inode, fmode_t flags); -#else -static inline int nfs_have_delegation(struct inode *inode, fmode_t flags) -{ - return 0; -} - -static inline int nfs_inode_return_delegation(struct inode *inode) -{ - return 0; -} #endif static inline int nfs_have_delegated_attributes(struct inode *inode) { - return nfs_have_delegation(inode, FMODE_READ) && + return NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) && !(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED); } diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 07ac3847e56..4a3d4ef7612 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -17,6 +17,7 @@ * 6 Jun 1999 Cache readdir lookups in the page cache. -DaveM */ +#include <linux/module.h> #include <linux/time.h> #include <linux/errno.h> #include <linux/stat.h> @@ -32,104 +33,67 @@ #include <linux/pagevec.h> #include <linux/namei.h> #include <linux/mount.h> +#include <linux/swap.h> #include <linux/sched.h> -#include <linux/vmalloc.h> +#include <linux/kmemleak.h> +#include <linux/xattr.h> #include "delegation.h" #include "iostat.h" #include "internal.h" #include "fscache.h" +#include "nfstrace.h" + /* #define NFS_DEBUG_VERBOSE 1 */ static int nfs_opendir(struct inode *, struct file *); -static int nfs_readdir(struct file *, void *, filldir_t); -static struct dentry *nfs_lookup(struct inode *, struct dentry *, struct nameidata *); -static int nfs_create(struct inode *, struct dentry *, int, struct nameidata *); -static int nfs_mkdir(struct inode *, struct dentry *, int); -static int nfs_rmdir(struct inode *, struct dentry *); -static int nfs_unlink(struct inode *, struct dentry *); -static int nfs_symlink(struct inode *, struct dentry *, const char *); -static int nfs_link(struct dentry *, struct inode *, struct dentry *); -static int nfs_mknod(struct inode *, struct dentry *, int, dev_t); -static int nfs_rename(struct inode *, struct dentry *, - struct inode *, struct dentry *); -static int nfs_fsync_dir(struct file *, int); +static int nfs_closedir(struct inode *, struct file *); +static int nfs_readdir(struct file *, struct dir_context *); +static int nfs_fsync_dir(struct file *, loff_t, loff_t, int); static loff_t nfs_llseek_dir(struct file *, loff_t, int); -static int nfs_readdir_clear_array(struct page*, gfp_t); +static void nfs_readdir_clear_array(struct page*); const struct file_operations nfs_dir_operations = { .llseek = nfs_llseek_dir, .read = generic_read_dir, - .readdir = nfs_readdir, + .iterate = nfs_readdir, .open = nfs_opendir, - .release = nfs_release, + .release = nfs_closedir, .fsync = nfs_fsync_dir, }; -const struct inode_operations nfs_dir_inode_operations = { - .create = nfs_create, - .lookup = nfs_lookup, - .link = nfs_link, - .unlink = nfs_unlink, - .symlink = nfs_symlink, - .mkdir = nfs_mkdir, - .rmdir = nfs_rmdir, - .mknod = nfs_mknod, - .rename = nfs_rename, - .permission = nfs_permission, - .getattr = nfs_getattr, - .setattr = nfs_setattr, -}; - -const struct address_space_operations nfs_dir_addr_space_ops = { - .releasepage = nfs_readdir_clear_array, +const struct address_space_operations nfs_dir_aops = { + .freepage = nfs_readdir_clear_array, }; -#ifdef CONFIG_NFS_V3 -const struct inode_operations nfs3_dir_inode_operations = { - .create = nfs_create, - .lookup = nfs_lookup, - .link = nfs_link, - .unlink = nfs_unlink, - .symlink = nfs_symlink, - .mkdir = nfs_mkdir, - .rmdir = nfs_rmdir, - .mknod = nfs_mknod, - .rename = nfs_rename, - .permission = nfs_permission, - .getattr = nfs_getattr, - .setattr = nfs_setattr, - .listxattr = nfs3_listxattr, - .getxattr = nfs3_getxattr, - .setxattr = nfs3_setxattr, - .removexattr = nfs3_removexattr, -}; -#endif /* CONFIG_NFS_V3 */ - -#ifdef CONFIG_NFS_V4 - -static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *); -static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd); -const struct inode_operations nfs4_dir_inode_operations = { - .create = nfs_open_create, - .lookup = nfs_atomic_lookup, - .link = nfs_link, - .unlink = nfs_unlink, - .symlink = nfs_symlink, - .mkdir = nfs_mkdir, - .rmdir = nfs_rmdir, - .mknod = nfs_mknod, - .rename = nfs_rename, - .permission = nfs_permission, - .getattr = nfs_getattr, - .setattr = nfs_setattr, - .getxattr = nfs4_getxattr, - .setxattr = nfs4_setxattr, - .listxattr = nfs4_listxattr, -}; +static struct nfs_open_dir_context *alloc_nfs_open_dir_context(struct inode *dir, struct rpc_cred *cred) +{ + struct nfs_inode *nfsi = NFS_I(dir); + struct nfs_open_dir_context *ctx; + ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); + if (ctx != NULL) { + ctx->duped = 0; + ctx->attr_gencount = nfsi->attr_gencount; + ctx->dir_cookie = 0; + ctx->dup_cookie = 0; + ctx->cred = get_rpccred(cred); + spin_lock(&dir->i_lock); + list_add(&ctx->list, &nfsi->open_files); + spin_unlock(&dir->i_lock); + return ctx; + } + return ERR_PTR(-ENOMEM); +} -#endif /* CONFIG_NFS_V4 */ +static void put_nfs_open_dir_context(struct inode *dir, struct nfs_open_dir_context *ctx) +{ + spin_lock(&dir->i_lock); + list_del(&ctx->list); + spin_unlock(&dir->i_lock); + put_rpccred(ctx->cred); + kfree(ctx); +} /* * Open file @@ -137,16 +101,23 @@ const struct inode_operations nfs4_dir_inode_operations = { static int nfs_opendir(struct inode *inode, struct file *filp) { - int res; + int res = 0; + struct nfs_open_dir_context *ctx; + struct rpc_cred *cred; - dfprintk(FILE, "NFS: open dir(%s/%s)\n", - filp->f_path.dentry->d_parent->d_name.name, - filp->f_path.dentry->d_name.name); + dfprintk(FILE, "NFS: open dir(%pD2)\n", filp); nfs_inc_stats(inode, NFSIOS_VFSOPEN); - /* Call generic open code in order to cache credentials */ - res = nfs_open(inode, filp); + cred = rpc_lookup_cred(); + if (IS_ERR(cred)) + return PTR_ERR(cred); + ctx = alloc_nfs_open_dir_context(inode, cred); + if (IS_ERR(ctx)) { + res = PTR_ERR(ctx); + goto out; + } + filp->private_data = ctx; if (filp->f_path.dentry == filp->f_path.mnt->mnt_root) { /* This is a mountpoint, so d_revalidate will never * have been called, so we need to refresh the @@ -154,30 +125,40 @@ nfs_opendir(struct inode *inode, struct file *filp) */ __nfs_revalidate_inode(NFS_SERVER(inode), inode); } +out: + put_rpccred(cred); return res; } +static int +nfs_closedir(struct inode *inode, struct file *filp) +{ + put_nfs_open_dir_context(filp->f_path.dentry->d_inode, filp->private_data); + return 0; +} + struct nfs_cache_array_entry { u64 cookie; u64 ino; struct qstr string; + unsigned char d_type; }; struct nfs_cache_array { - unsigned int size; + int size; int eof_index; u64 last_cookie; struct nfs_cache_array_entry array[0]; }; -#define MAX_READDIR_ARRAY ((PAGE_SIZE - sizeof(struct nfs_cache_array)) / sizeof(struct nfs_cache_array_entry)) - -typedef __be32 * (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +typedef int (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, int); typedef struct { struct file *file; struct page *page; + struct dir_context *ctx; unsigned long page_index; u64 *dir_cookie; + u64 last_cookie; loff_t current_index; decode_dirent_t decode; @@ -194,9 +175,13 @@ typedef struct { static struct nfs_cache_array *nfs_readdir_get_array(struct page *page) { + void *ptr; if (page == NULL) return ERR_PTR(-EIO); - return (struct nfs_cache_array *)kmap(page); + ptr = kmap(page); + if (ptr == NULL) + return ERR_PTR(-ENOMEM); + return ptr; } static @@ -209,14 +194,15 @@ void nfs_readdir_release_array(struct page *page) * we are freeing strings created by nfs_add_to_readdir_array() */ static -int nfs_readdir_clear_array(struct page *page, gfp_t mask) +void nfs_readdir_clear_array(struct page *page) { - struct nfs_cache_array *array = nfs_readdir_get_array(page); + struct nfs_cache_array *array; int i; + + array = kmap_atomic(page); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); - nfs_readdir_release_array(page); - return 0; + kunmap_atomic(array); } /* @@ -231,6 +217,11 @@ int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int le string->name = kmemdup(name, len, GFP_KERNEL); if (string->name == NULL) return -ENOMEM; + /* + * Avoid a kmemleak false positive. The pointer to the name is stored + * in a page cache page which kmemleak does not scan. + */ + kmemleak_not_leak(string->name); string->hash = full_name_hash(name, len); return 0; } @@ -244,20 +235,24 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (IS_ERR(array)) return PTR_ERR(array); - ret = -EIO; - if (array->size >= MAX_READDIR_ARRAY) - goto out; cache_entry = &array->array[array->size]; + + /* Check that this entry lies within the page bounds */ + ret = -ENOSPC; + if ((char *)&cache_entry[1] - (char *)page_address(page) > PAGE_SIZE) + goto out; + cache_entry->cookie = entry->prev_cookie; cache_entry->ino = entry->ino; + cache_entry->d_type = entry->d_type; ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len); if (ret) goto out; array->last_cookie = entry->cookie; - if (entry->eof == 1) - array->eof_index = array->size; array->size++; + if (entry->eof != 0) + array->eof_index = array->size; out: nfs_readdir_release_array(page); return ret; @@ -266,47 +261,79 @@ out: static int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc) { - loff_t diff = desc->file->f_pos - desc->current_index; + loff_t diff = desc->ctx->pos - desc->current_index; unsigned int index; if (diff < 0) goto out_eof; if (diff >= array->size) { - if (array->eof_index > 0) + if (array->eof_index >= 0) goto out_eof; - desc->current_index += array->size; return -EAGAIN; } index = (unsigned int)diff; *desc->dir_cookie = array->array[index].cookie; desc->cache_entry_index = index; - if (index == array->eof_index) - desc->eof = 1; return 0; out_eof: desc->eof = 1; return -EBADCOOKIE; } +static bool +nfs_readdir_inode_mapping_valid(struct nfs_inode *nfsi) +{ + if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) + return false; + smp_rmb(); + return !test_bit(NFS_INO_INVALIDATING, &nfsi->flags); +} + static int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc) { int i; + loff_t new_pos; int status = -EAGAIN; for (i = 0; i < array->size; i++) { - if (i == array->eof_index) { - desc->eof = 1; - status = -EBADCOOKIE; - } if (array->array[i].cookie == *desc->dir_cookie) { + struct nfs_inode *nfsi = NFS_I(file_inode(desc->file)); + struct nfs_open_dir_context *ctx = desc->file->private_data; + + new_pos = desc->current_index + i; + if (ctx->attr_gencount != nfsi->attr_gencount || + !nfs_readdir_inode_mapping_valid(nfsi)) { + ctx->duped = 0; + ctx->attr_gencount = nfsi->attr_gencount; + } else if (new_pos < desc->ctx->pos) { + if (ctx->duped > 0 + && ctx->dup_cookie == *desc->dir_cookie) { + if (printk_ratelimit()) { + pr_notice("NFS: directory %pD2 contains a readdir loop." + "Please contact your server vendor. " + "The file: %.*s has duplicate cookie %llu\n", + desc->file, array->array[i].string.len, + array->array[i].string.name, *desc->dir_cookie); + } + status = -ELOOP; + goto out; + } + ctx->dup_cookie = *desc->dir_cookie; + ctx->duped = -1; + } + desc->ctx->pos = new_pos; desc->cache_entry_index = i; - status = 0; - break; + return 0; } } - + if (array->eof_index >= 0) { + status = -EBADCOOKIE; + if (*desc->dir_cookie == array->last_cookie) + desc->eof = 1; + } +out: return status; } @@ -314,10 +341,7 @@ static int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) { struct nfs_cache_array *array; - int status = -EBADCOOKIE; - - if (desc->dir_cookie == NULL) - goto out; + int status; array = nfs_readdir_get_array(desc->page); if (IS_ERR(array)) { @@ -330,6 +354,11 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) else status = nfs_readdir_search_for_cookie(array, desc); + if (status == -EAGAIN) { + desc->last_cookie = array->last_cookie; + desc->current_index += array->size; + desc->page_index++; + } nfs_readdir_release_array(desc->page); out: return status; @@ -340,7 +369,8 @@ static int nfs_readdir_xdr_filler(struct page **pages, nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct file *file, struct inode *inode) { - struct rpc_cred *cred = nfs_file_cred(file); + struct nfs_open_dir_context *ctx = file->private_data; + struct rpc_cred *cred = ctx->cred; unsigned long timestamp, gencount; int error; @@ -365,14 +395,14 @@ error: return error; } -/* Fill in an entry based on the xdr code stored in desc->page */ -static -int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct xdr_stream *stream) +static int xdr_decode(nfs_readdir_descriptor_t *desc, + struct nfs_entry *entry, struct xdr_stream *xdr) { - __be32 *p = desc->decode(stream, entry, NFS_SERVER(desc->file->f_path.dentry->d_inode), desc->plus); - if (IS_ERR(p)) - return PTR_ERR(p); + int error; + error = desc->decode(xdr, entry, desc->plus); + if (error) + return error; entry->fattr->time_start = desc->timestamp; entry->fattr->gencount = desc->gencount; return 0; @@ -381,13 +411,9 @@ int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct x static int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry) { - struct nfs_inode *node; if (dentry->d_inode == NULL) goto different; - node = NFS_I(dentry->d_inode); - if (node->fh.size != entry->fh->size) - goto different; - if (strncmp(node->fh.data, entry->fh->data, node->fh.size) != 0) + if (nfs_compare_fh(entry->fh, NFS_FH(dentry->d_inode)) != 0) goto different; return 1; different: @@ -395,16 +421,53 @@ different: } static +bool nfs_use_readdirplus(struct inode *dir, struct dir_context *ctx) +{ + if (!nfs_server_capable(dir, NFS_CAP_READDIRPLUS)) + return false; + if (test_and_clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(dir)->flags)) + return true; + if (ctx->pos == 0) + return true; + return false; +} + +/* + * This function is called by the lookup code to request the use of + * readdirplus to accelerate any future lookups in the same + * directory. + */ +static +void nfs_advise_use_readdirplus(struct inode *dir) +{ + set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(dir)->flags); +} + +/* + * This function is mainly for use by nfs_getattr(). + * + * If this is an 'ls -l', we want to force use of readdirplus. + * Do this by checking if there is an active file descriptor + * and calling nfs_advise_use_readdirplus, then forcing a + * cache flush. + */ +void nfs_force_use_readdirplus(struct inode *dir) +{ + if (!list_empty(&NFS_I(dir)->open_files)) { + nfs_advise_use_readdirplus(dir); + nfs_zap_mapping(dir, dir->i_mapping); + } +} + +static void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) { - struct qstr filename = { - .len = entry->len, - .name = entry->name, - }; + struct qstr filename = QSTR_INIT(entry->name, entry->len); struct dentry *dentry; struct dentry *alias; struct inode *dir = parent->d_inode; struct inode *inode; + int status; if (filename.name[0] == '.') { if (filename.len == 1) @@ -417,10 +480,14 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) dentry = d_lookup(parent, &filename); if (dentry != NULL) { if (nfs_same_file(dentry, entry)) { - nfs_refresh_inode(dentry->d_inode, entry->fattr); + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + status = nfs_refresh_inode(dentry->d_inode, entry->fattr); + if (!status) + nfs_setsecurity(dentry->d_inode, entry->fattr, entry->label); goto out; } else { - d_drop(dentry); + if (d_invalidate(dentry) != 0) + goto out; dput(dentry); } } @@ -429,8 +496,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) if (dentry == NULL) return; - dentry->d_op = NFS_PROTO(dir)->dentry_ops; - inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr); + inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr, entry->label); if (IS_ERR(inode)) goto out; @@ -449,43 +515,53 @@ out: /* Perform conversion from xdr to cache array */ static -void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, - void *xdr_page, struct page *page, unsigned int buflen) +int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, + struct page **xdr_pages, struct page *page, unsigned int buflen) { struct xdr_stream stream; struct xdr_buf buf; - __be32 *ptr = xdr_page; - int status; + struct page *scratch; struct nfs_cache_array *array; + unsigned int count = 0; + int status; - buf.head->iov_base = xdr_page; - buf.head->iov_len = buflen; - buf.tail->iov_len = 0; - buf.page_base = 0; - buf.page_len = 0; - buf.buflen = buf.head->iov_len; - buf.len = buf.head->iov_len; - - xdr_init_decode(&stream, &buf, ptr); + scratch = alloc_page(GFP_KERNEL); + if (scratch == NULL) + return -ENOMEM; + xdr_init_decode_pages(&stream, &buf, xdr_pages, buflen); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); do { status = xdr_decode(desc, entry, &stream); - if (status != 0) + if (status != 0) { + if (status == -EAGAIN) + status = 0; break; + } - if (nfs_readdir_add_to_array(entry, page) == -1) - break; - if (desc->plus == 1) + count++; + + if (desc->plus != 0) nfs_prime_dcache(desc->file->f_path.dentry, entry); + + status = nfs_readdir_add_to_array(entry, page); + if (status != 0) + break; } while (!entry->eof); - if (status == -EBADCOOKIE && entry->eof) { + if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) { array = nfs_readdir_get_array(page); - array->eof_index = array->size - 1; - status = 0; - nfs_readdir_release_array(page); + if (!IS_ERR(array)) { + array->eof_index = array->size; + status = 0; + nfs_readdir_release_array(page); + } else + status = PTR_ERR(array); } + + put_page(scratch); + return status; } static @@ -500,7 +576,6 @@ static void nfs_readdir_free_large_page(void *ptr, struct page **pages, unsigned int npages) { - vm_unmap_ram(ptr, npages); nfs_readdir_free_pagearray(pages, npages); } @@ -509,9 +584,8 @@ void nfs_readdir_free_large_page(void *ptr, struct page **pages, * to nfs_readdir_free_large_page */ static -void *nfs_readdir_large_page(struct page **pages, unsigned int npages) +int nfs_readdir_large_page(struct page **pages, unsigned int npages) { - void *ptr; unsigned int i; for (i = 0; i < npages; i++) { @@ -520,13 +594,11 @@ void *nfs_readdir_large_page(struct page **pages, unsigned int npages) goto out_freepages; pages[i] = page; } + return 0; - ptr = vm_map_ram(pages, npages, 0, PAGE_KERNEL); - if (!IS_ERR_OR_NULL(ptr)) - return ptr; out_freepages: nfs_readdir_free_pagearray(pages, i); - return NULL; + return -ENOMEM; } static @@ -537,35 +609,55 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct nfs_entry entry; struct file *file = desc->file; struct nfs_cache_array *array; - int status = 0; + int status = -ENOMEM; unsigned int array_size = ARRAY_SIZE(pages); entry.prev_cookie = 0; - entry.cookie = *desc->dir_cookie; + entry.cookie = desc->last_cookie; entry.eof = 0; entry.fh = nfs_alloc_fhandle(); entry.fattr = nfs_alloc_fattr(); + entry.server = NFS_SERVER(inode); if (entry.fh == NULL || entry.fattr == NULL) goto out; + entry.label = nfs4_label_alloc(NFS_SERVER(inode), GFP_NOWAIT); + if (IS_ERR(entry.label)) { + status = PTR_ERR(entry.label); + goto out; + } + array = nfs_readdir_get_array(page); + if (IS_ERR(array)) { + status = PTR_ERR(array); + goto out_label_free; + } memset(array, 0, sizeof(struct nfs_cache_array)); array->eof_index = -1; - pages_ptr = nfs_readdir_large_page(pages, array_size); - if (!pages_ptr) + status = nfs_readdir_large_page(pages, array_size); + if (status < 0) goto out_release_array; do { + unsigned int pglen; status = nfs_readdir_xdr_filler(pages, desc, &entry, file, inode); if (status < 0) break; - nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); - } while (array->eof_index < 0 && array->size < MAX_READDIR_ARRAY); + pglen = status; + status = nfs_readdir_page_filler(desc, &entry, pages, page, pglen); + if (status < 0) { + if (status == -ENOSPC) + status = 0; + break; + } + } while (array->eof_index < 0); nfs_readdir_free_large_page(pages_ptr, pages, array_size); out_release_array: nfs_readdir_release_array(page); +out_label_free: + nfs4_label_free(entry.label); out: nfs_free_fattr(entry.fattr); nfs_free_fhandle(entry.fh); @@ -581,9 +673,11 @@ out: static int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) { - struct inode *inode = desc->file->f_path.dentry->d_inode; + struct inode *inode = file_inode(desc->file); + int ret; - if (nfs_readdir_xdr_to_array(desc, page, inode) < 0) + ret = nfs_readdir_xdr_to_array(desc, page, inode); + if (ret < 0) goto error; SetPageUptodate(page); @@ -595,12 +689,14 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) return 0; error: unlock_page(page); - return -EIO; + return ret; } static void cache_page_release(nfs_readdir_descriptor_t *desc) { + if (!desc->page->mapping) + nfs_readdir_clear_array(desc->page); page_cache_release(desc->page); desc->page = NULL; } @@ -608,12 +704,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc) static struct page *get_cache_page(nfs_readdir_descriptor_t *desc) { - struct page *page; - page = read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, + return read_cache_page(file_inode(desc->file)->i_mapping, desc->page_index, (filler_t *)nfs_readdir_filler, desc); - if (IS_ERR(page)) - desc->eof = 1; - return page; } /* @@ -629,9 +721,8 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) return PTR_ERR(desc->page); res = nfs_readdir_search_array(desc); - if (res == 0) - return 0; - cache_page_release(desc); + if (res != 0) + cache_page_release(desc); return res; } @@ -639,62 +730,59 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) static inline int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) { - int res = -EAGAIN; + int res; - while (1) { - res = find_cache_page(desc); - if (res != -EAGAIN) - break; - desc->page_index++; + if (desc->page_index == 0) { + desc->current_index = 0; + desc->last_cookie = 0; } + do { + res = find_cache_page(desc); + } while (res == -EAGAIN); return res; } -static inline unsigned int dt_type(struct inode *inode) -{ - return (inode->i_mode >> 12) & 15; -} - /* * Once we've found the start of the dirent within a page: fill 'er up... */ static -int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, - filldir_t filldir) +int nfs_do_filldir(nfs_readdir_descriptor_t *desc) { struct file *file = desc->file; int i = 0; int res = 0; struct nfs_cache_array *array = NULL; - unsigned int d_type = DT_UNKNOWN; - struct dentry *dentry = NULL; + struct nfs_open_dir_context *ctx = file->private_data; array = nfs_readdir_get_array(desc->page); + if (IS_ERR(array)) { + res = PTR_ERR(array); + goto out; + } for (i = desc->cache_entry_index; i < array->size; i++) { - d_type = DT_UNKNOWN; + struct nfs_cache_array_entry *ent; - res = filldir(dirent, array->array[i].string.name, - array->array[i].string.len, file->f_pos, - nfs_compat_user_ino64(array->array[i].ino), d_type); - if (res < 0) + ent = &array->array[i]; + if (!dir_emit(desc->ctx, ent->string.name, ent->string.len, + nfs_compat_user_ino64(ent->ino), ent->d_type)) { + desc->eof = 1; break; - file->f_pos++; - desc->cache_entry_index = i; + } + desc->ctx->pos++; if (i < (array->size-1)) *desc->dir_cookie = array->array[i+1].cookie; else *desc->dir_cookie = array->last_cookie; - if (i == array->eof_index) { - desc->eof = 1; - break; - } + if (ctx->duped != 0) + ctx->duped = 1; } + if (array->eof_index >= 0) + desc->eof = 1; nfs_readdir_release_array(desc->page); +out: cache_page_release(desc); - if (dentry != NULL) - dput(dentry); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res; @@ -713,12 +801,12 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, * directory in the page cache by the time we get here. */ static inline -int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, - filldir_t filldir) +int uncached_readdir(nfs_readdir_descriptor_t *desc) { struct page *page = NULL; int status; - struct inode *inode = desc->file->f_path.dentry->d_inode; + struct inode *inode = file_inode(desc->file); + struct nfs_open_dir_context *ctx = desc->file->private_data; dfprintk(DIRCACHE, "NFS: uncached_readdir() searching for cookie %Lu\n", (unsigned long long)*desc->dir_cookie); @@ -729,14 +817,16 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, goto out; } - if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) { - status = -EIO; - goto out_release; - } - desc->page_index = 0; + desc->last_cookie = *desc->dir_cookie; desc->page = page; - status = nfs_do_filldir(desc, dirent, filldir); + ctx->duped = 0; + + status = nfs_readdir_xdr_to_array(desc, page, inode); + if (status < 0) + goto out_release; + + status = nfs_do_filldir(desc); out: dfprintk(DIRCACHE, "NFS: %s: returns %d\n", @@ -747,53 +837,66 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, goto out; } +static bool nfs_dir_mapping_need_revalidate(struct inode *dir) +{ + struct nfs_inode *nfsi = NFS_I(dir); + + if (nfs_attribute_cache_expired(dir)) + return true; + if (nfsi->cache_validity & NFS_INO_INVALID_DATA) + return true; + return false; +} + /* The file offset position represents the dirent entry number. A last cookie cache takes care of the common case of reading the whole directory. */ -static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) +static int nfs_readdir(struct file *file, struct dir_context *ctx) { - struct dentry *dentry = filp->f_path.dentry; + struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; nfs_readdir_descriptor_t my_desc, *desc = &my_desc; - int res = -ENOMEM; + struct nfs_open_dir_context *dir_ctx = file->private_data; + int res = 0; - dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - (long long)filp->f_pos); + dfprintk(FILE, "NFS: readdir(%pD2) starting at cookie %llu\n", + file, (long long)ctx->pos); nfs_inc_stats(inode, NFSIOS_VFSGETDENTS); /* - * filp->f_pos points to the dirent entry number. + * ctx->pos points to the dirent entry number. * *desc->dir_cookie has the cookie for the next entry. We have * to either find the entry with the appropriate number or * revalidate the cookie. */ memset(desc, 0, sizeof(*desc)); - desc->file = filp; - desc->dir_cookie = &nfs_file_open_context(filp)->dir_cookie; + desc->file = file; + desc->ctx = ctx; + desc->dir_cookie = &dir_ctx->dir_cookie; desc->decode = NFS_PROTO(inode)->decode_dirent; - desc->plus = NFS_USE_READDIRPLUS(inode); + desc->plus = nfs_use_readdirplus(inode, ctx) ? 1 : 0; nfs_block_sillyrename(dentry); - res = nfs_revalidate_mapping(inode, filp->f_mapping); + if (ctx->pos == 0 || nfs_dir_mapping_need_revalidate(inode)) + res = nfs_revalidate_mapping(inode, file->f_mapping); if (res < 0) goto out; - while (desc->eof != 1) { + do { res = readdir_search_pagecache(desc); if (res == -EBADCOOKIE) { + res = 0; /* This means either end of directory */ if (*desc->dir_cookie && desc->eof == 0) { /* Or that the server has 'lost' a cookie */ - res = uncached_readdir(desc, dirent, filldir); - if (res >= 0) + res = uncached_readdir(desc); + if (res == 0) continue; } - res = 0; break; } if (res == -ETOOSMALL && desc->plus) { @@ -807,34 +910,28 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (res < 0) break; - res = nfs_do_filldir(desc, dirent, filldir); - if (res < 0) { - res = 0; + res = nfs_do_filldir(desc); + if (res < 0) break; - } - } + } while (!desc->eof); out: nfs_unblock_sillyrename(dentry); if (res > 0) res = 0; - dfprintk(FILE, "NFS: readdir(%s/%s) returns %d\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - res); + dfprintk(FILE, "NFS: readdir(%pD2) returns %d\n", file, res); return res; } -static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) +static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int whence) { - struct dentry *dentry = filp->f_path.dentry; - struct inode *inode = dentry->d_inode; + struct inode *inode = file_inode(filp); + struct nfs_open_dir_context *dir_ctx = filp->private_data; - dfprintk(FILE, "NFS: llseek dir(%s/%s, %lld, %d)\n", - dentry->d_parent->d_name.name, - dentry->d_name.name, - offset, origin); + dfprintk(FILE, "NFS: llseek dir(%pD2, %lld, %d)\n", + filp, offset, whence); mutex_lock(&inode->i_mutex); - switch (origin) { + switch (whence) { case 1: offset += filp->f_pos; case 0: @@ -846,7 +943,8 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) } if (offset != filp->f_pos) { filp->f_pos = offset; - nfs_file_open_context(filp)->dir_cookie = 0; + dir_ctx->dir_cookie = 0; + dir_ctx->duped = 0; } out: mutex_unlock(&inode->i_mutex); @@ -857,15 +955,16 @@ out: * All directory operations under NFS are synchronous, so fsync() * is a dummy operation. */ -static int nfs_fsync_dir(struct file *filp, int datasync) +static int nfs_fsync_dir(struct file *filp, loff_t start, loff_t end, + int datasync) { - struct dentry *dentry = filp->f_path.dentry; + struct inode *inode = file_inode(filp); - dfprintk(FILE, "NFS: fsync dir(%s/%s) datasync %d\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - datasync); + dfprintk(FILE, "NFS: fsync dir(%pD2) datasync %d\n", filp, datasync); - nfs_inc_stats(dentry->d_inode, NFSIOS_VFSFSYNC); + mutex_lock(&inode->i_mutex); + nfs_inc_stats(inode, NFSIOS_VFSFSYNC); + mutex_unlock(&inode->i_mutex); return 0; } @@ -883,6 +982,7 @@ void nfs_force_lookup_revalidate(struct inode *dir) { NFS_I(dir)->cache_change_attribute++; } +EXPORT_SYMBOL_GPL(nfs_force_lookup_revalidate); /* * A check for whether or not the parent directory has changed. @@ -906,28 +1006,14 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry) } /* - * Return the intent data that applies to this particular path component - * - * Note that the current set of intents only apply to the very last - * component of the path. - * We check for this using LOOKUP_CONTINUE and LOOKUP_PARENT. - */ -static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd, unsigned int mask) -{ - if (nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT)) - return 0; - return nd->flags & mask; -} - -/* * Use intent information to check whether or not we're going to do * an O_EXCL create using this path component. */ -static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd) +static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags) { if (NFS_PROTO(dir)->version == 2) return 0; - return nd && nfs_lookup_check_intent(nd, LOOKUP_EXCL); + return flags & LOOKUP_EXCL; } /* @@ -938,28 +1024,28 @@ static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd) * particular file and the "nocto" mount flag is not set. * */ -static inline -int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd) +static +int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags) { struct nfs_server *server = NFS_SERVER(inode); + int ret; - if (test_bit(NFS_INO_MOUNTPOINT, &NFS_I(inode)->flags)) - return 0; - if (nd != NULL) { - /* VFS wants an on-the-wire revalidation */ - if (nd->flags & LOOKUP_REVAL) - goto out_force; - /* This is an open(2) */ - if (nfs_lookup_check_intent(nd, LOOKUP_OPEN) != 0 && - !(server->flags & NFS_MOUNT_NOCTO) && - (S_ISREG(inode->i_mode) || - S_ISDIR(inode->i_mode))) - goto out_force; + if (IS_AUTOMOUNT(inode)) return 0; - } - return nfs_revalidate_inode(server, inode); + /* VFS wants an on-the-wire revalidation */ + if (flags & LOOKUP_REVAL) + goto out_force; + /* This is an open(2) */ + if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) && + (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) + goto out_force; +out: + return (inode->i_nlink == 0) ? -ENOENT : 0; out_force: - return __nfs_revalidate_inode(server, inode); + ret = __nfs_revalidate_inode(server, inode); + if (ret != 0) + return ret; + goto out; } /* @@ -971,10 +1057,10 @@ out_force: */ static inline int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry, - struct nameidata *nd) + unsigned int flags) { /* Don't revalidate a negative dentry if we're creating a new file */ - if (nd != NULL && nfs_lookup_check_intent(nd, LOOKUP_CREATE) != 0) + if (flags & LOOKUP_CREATE) return 0; if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) return 1; @@ -992,39 +1078,42 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry, * If the parent directory is seen to have changed, we throw out the * cached dentry and do a new lookup. */ -static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) +static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags) { struct inode *dir; struct inode *inode; struct dentry *parent; struct nfs_fh *fhandle = NULL; struct nfs_fattr *fattr = NULL; + struct nfs4_label *label = NULL; int error; + if (flags & LOOKUP_RCU) + return -ECHILD; + parent = dget_parent(dentry); dir = parent->d_inode; nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE); inode = dentry->d_inode; if (!inode) { - if (nfs_neg_need_reval(dir, dentry, nd)) + if (nfs_neg_need_reval(dir, dentry, flags)) goto out_bad; - goto out_valid; + goto out_valid_noent; } if (is_bad_inode(inode)) { - dfprintk(LOOKUPCACHE, "%s: %s/%s has dud inode\n", - __func__, dentry->d_parent->d_name.name, - dentry->d_name.name); + dfprintk(LOOKUPCACHE, "%s: %pd2 has dud inode\n", + __func__, dentry); goto out_bad; } - if (nfs_have_delegation(inode, FMODE_READ)) + if (NFS_PROTO(dir)->have_delegation(inode, FMODE_READ)) goto out_set_verifier; /* Force a full look up iff the parent directory has changed */ - if (!nfs_is_exclusive_create(dir, nd) && nfs_check_verifier(dir, dentry)) { - if (nfs_lookup_verify_inode(inode, nd)) + if (!nfs_is_exclusive_create(dir, flags) && nfs_check_verifier(dir, dentry)) { + if (nfs_lookup_verify_inode(inode, flags)) goto out_zap_parent; goto out_valid; } @@ -1038,7 +1127,13 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) if (fhandle == NULL || fattr == NULL) goto out_error; - error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr); + label = nfs4_label_alloc(NFS_SERVER(inode), GFP_NOWAIT); + if (IS_ERR(label)) + goto out_error; + + trace_nfs_lookup_revalidate_enter(dir, dentry, flags); + error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label); + trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error); if (error) goto out_bad; if (nfs_compare_fh(NFS_FH(inode), fhandle)) @@ -1046,56 +1141,103 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) if ((error = nfs_refresh_inode(inode, fattr)) != 0) goto out_bad; + nfs_setsecurity(inode, fattr, label); + nfs_free_fattr(fattr); nfs_free_fhandle(fhandle); + nfs4_label_free(label); + out_set_verifier: nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); out_valid: + /* Success: notify readdir to use READDIRPLUS */ + nfs_advise_use_readdirplus(dir); + out_valid_noent: dput(parent); - dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is valid\n", - __func__, dentry->d_parent->d_name.name, - dentry->d_name.name); + dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is valid\n", + __func__, dentry); return 1; out_zap_parent: nfs_zap_caches(dir); out_bad: + nfs_free_fattr(fattr); + nfs_free_fhandle(fhandle); + nfs4_label_free(label); nfs_mark_for_revalidate(dir); if (inode && S_ISDIR(inode->i_mode)) { /* Purge readdir caches. */ nfs_zap_caches(inode); - /* If we have submounts, don't unhash ! */ - if (have_submounts(dentry)) - goto out_valid; - if (dentry->d_flags & DCACHE_DISCONNECTED) + /* + * We can't d_drop the root of a disconnected tree: + * its d_hash is on the s_anon list and d_drop() would hide + * it from shrink_dcache_for_unmount(), leading to busy + * inodes on unmount and further oopses. + */ + if (IS_ROOT(dentry)) goto out_valid; - shrink_dcache_parent(dentry); } - d_drop(dentry); - nfs_free_fattr(fattr); - nfs_free_fhandle(fhandle); + /* If we have submounts, don't unhash ! */ + if (check_submounts_and_drop(dentry) != 0) + goto out_valid; + dput(parent); - dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n", - __func__, dentry->d_parent->d_name.name, - dentry->d_name.name); + dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n", + __func__, dentry); return 0; out_error: nfs_free_fattr(fattr); nfs_free_fhandle(fhandle); + nfs4_label_free(label); dput(parent); - dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) lookup returned error %d\n", - __func__, dentry->d_parent->d_name.name, - dentry->d_name.name, error); + dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) lookup returned error %d\n", + __func__, dentry, error); return error; } /* + * A weaker form of d_revalidate for revalidating just the dentry->d_inode + * when we don't really care about the dentry name. This is called when a + * pathwalk ends on a dentry that was not found via a normal lookup in the + * parent dir (e.g.: ".", "..", procfs symlinks or mountpoint traversals). + * + * In this situation, we just want to verify that the inode itself is OK + * since the dentry might have changed on the server. + */ +static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags) +{ + int error; + struct inode *inode = dentry->d_inode; + + /* + * I believe we can only get a negative dentry here in the case of a + * procfs-style symlink. Just assume it's correct for now, but we may + * eventually need to do something more here. + */ + if (!inode) { + dfprintk(LOOKUPCACHE, "%s: %pd2 has negative inode\n", + __func__, dentry); + return 1; + } + + if (is_bad_inode(inode)) { + dfprintk(LOOKUPCACHE, "%s: %pd2 has dud inode\n", + __func__, dentry); + return 0; + } + + error = nfs_revalidate_inode(NFS_SERVER(inode), inode); + dfprintk(LOOKUPCACHE, "NFS: %s: inode %lu is %s\n", + __func__, inode->i_ino, error ? "invalid" : "valid"); + return !error; +} + +/* * This is called from dput() when d_count is going to 0. */ -static int nfs_dentry_delete(struct dentry *dentry) +static int nfs_dentry_delete(const struct dentry *dentry) { - dfprintk(VFS, "NFS: dentry_delete(%s/%s, %x)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - dentry->d_flags); + dfprintk(VFS, "NFS: dentry_delete(%pd2, %x)\n", + dentry, dentry->d_flags); /* Unhash any dentry with a stale inode */ if (dentry->d_inode != NULL && NFS_STALE(dentry->d_inode)) @@ -1114,11 +1256,14 @@ static int nfs_dentry_delete(struct dentry *dentry) } +/* Ensure that we revalidate inode->i_nlink */ static void nfs_drop_nlink(struct inode *inode) { spin_lock(&inode->i_lock); - if (inode->i_nlink > 0) - drop_nlink(inode); + /* drop the inode if we're reasonably sure this is the last link */ + if (inode->i_nlink == 1) + clear_nlink(inode); + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; spin_unlock(&inode->i_lock); } @@ -1133,42 +1278,55 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode) NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { - drop_nlink(inode); nfs_complete_unlink(dentry, inode); + nfs_drop_nlink(inode); } iput(inode); } +static void nfs_d_release(struct dentry *dentry) +{ + /* free cached devname value, if it survived that far */ + if (unlikely(dentry->d_fsdata)) { + if (dentry->d_flags & DCACHE_NFSFS_RENAMED) + WARN_ON(1); + else + kfree(dentry->d_fsdata); + } +} + const struct dentry_operations nfs_dentry_operations = { .d_revalidate = nfs_lookup_revalidate, + .d_weak_revalidate = nfs_weak_revalidate, .d_delete = nfs_dentry_delete, .d_iput = nfs_dentry_iput, + .d_automount = nfs_d_automount, + .d_release = nfs_d_release, }; +EXPORT_SYMBOL_GPL(nfs_dentry_operations); -static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd) +struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags) { struct dentry *res; struct dentry *parent; struct inode *inode = NULL; struct nfs_fh *fhandle = NULL; struct nfs_fattr *fattr = NULL; + struct nfs4_label *label = NULL; int error; - dfprintk(VFS, "NFS: lookup(%s/%s)\n", - dentry->d_parent->d_name.name, dentry->d_name.name); + dfprintk(VFS, "NFS: lookup(%pd2)\n", dentry); nfs_inc_stats(dir, NFSIOS_VFSLOOKUP); res = ERR_PTR(-ENAMETOOLONG); if (dentry->d_name.len > NFS_SERVER(dir)->namelen) goto out; - dentry->d_op = NFS_PROTO(dir)->dentry_ops; - /* * If we're doing an exclusive create, optimize away the lookup * but don't hash the dentry. */ - if (nfs_is_exclusive_create(dir, nd)) { + if (nfs_is_exclusive_create(dir, flags)) { d_instantiate(dentry, NULL); res = NULL; goto out; @@ -1180,21 +1338,29 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru if (fhandle == NULL || fattr == NULL) goto out; + label = nfs4_label_alloc(NFS_SERVER(dir), GFP_NOWAIT); + if (IS_ERR(label)) + goto out; + parent = dentry->d_parent; /* Protect against concurrent sillydeletes */ + trace_nfs_lookup_enter(dir, dentry, flags); nfs_block_sillyrename(parent); - error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr); + error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label); if (error == -ENOENT) goto no_entry; if (error < 0) { res = ERR_PTR(error); goto out_unblock_sillyrename; } - inode = nfs_fhget(dentry->d_sb, fhandle, fattr); - res = (struct dentry *)inode; + inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label); + res = ERR_CAST(inode); if (IS_ERR(res)) goto out_unblock_sillyrename; + /* Success: notify readdir to use READDIRPLUS */ + nfs_advise_use_readdirplus(dir); + no_entry: res = d_materialise_unique(dentry, inode); if (res != NULL) { @@ -1205,189 +1371,180 @@ no_entry: nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); out_unblock_sillyrename: nfs_unblock_sillyrename(parent); + trace_nfs_lookup_exit(dir, dentry, flags, error); + nfs4_label_free(label); out: nfs_free_fattr(fattr); nfs_free_fhandle(fhandle); return res; } +EXPORT_SYMBOL_GPL(nfs_lookup); -#ifdef CONFIG_NFS_V4 -static int nfs_open_revalidate(struct dentry *, struct nameidata *); +#if IS_ENABLED(CONFIG_NFS_V4) +static int nfs4_lookup_revalidate(struct dentry *, unsigned int); const struct dentry_operations nfs4_dentry_operations = { - .d_revalidate = nfs_open_revalidate, + .d_revalidate = nfs4_lookup_revalidate, .d_delete = nfs_dentry_delete, .d_iput = nfs_dentry_iput, + .d_automount = nfs_d_automount, + .d_release = nfs_d_release, }; +EXPORT_SYMBOL_GPL(nfs4_dentry_operations); -/* - * Use intent information to determine whether we need to substitute - * the NFSv4-style stateful OPEN for the LOOKUP call - */ -static int is_atomic_open(struct nameidata *nd) +static fmode_t flags_to_mode(int flags) { - if (nd == NULL || nfs_lookup_check_intent(nd, LOOKUP_OPEN) == 0) - return 0; - /* NFS does not (yet) have a stateful open for directories */ - if (nd->flags & LOOKUP_DIRECTORY) - return 0; - /* Are we trying to write to a read only partition? */ - if (__mnt_is_readonly(nd->path.mnt) && - (nd->intent.open.flags & (O_CREAT|O_TRUNC|FMODE_WRITE))) - return 0; - return 1; + fmode_t res = (__force fmode_t)flags & FMODE_EXEC; + if ((flags & O_ACCMODE) != O_WRONLY) + res |= FMODE_READ; + if ((flags & O_ACCMODE) != O_RDONLY) + res |= FMODE_WRITE; + return res; } -static struct nfs_open_context *nameidata_to_nfs_open_context(struct dentry *dentry, struct nameidata *nd) +static struct nfs_open_context *create_nfs_open_context(struct dentry *dentry, int open_flags) { - struct path path = { - .mnt = nd->path.mnt, - .dentry = dentry, - }; - struct nfs_open_context *ctx; - struct rpc_cred *cred; - fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); - - cred = rpc_lookup_cred(); - if (IS_ERR(cred)) - return ERR_CAST(cred); - ctx = alloc_nfs_open_context(&path, cred, fmode); - put_rpccred(cred); - if (ctx == NULL) - return ERR_PTR(-ENOMEM); - return ctx; + return alloc_nfs_open_context(dentry, flags_to_mode(open_flags)); } static int do_open(struct inode *inode, struct file *filp) { - nfs_fscache_set_inode_cookie(inode, filp); + nfs_fscache_open_file(inode, filp); return 0; } -static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ctx) +static int nfs_finish_open(struct nfs_open_context *ctx, + struct dentry *dentry, + struct file *file, unsigned open_flags, + int *opened) { - struct file *filp; - int ret = 0; + int err; + + if ((open_flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) + *opened |= FILE_CREATED; + + err = finish_open(file, dentry, do_open, opened); + if (err) + goto out; + nfs_file_set_open_context(file, ctx); - /* If the open_intent is for execute, we have an extra check to make */ - if (ctx->mode & FMODE_EXEC) { - ret = nfs_may_open(ctx->path.dentry->d_inode, - ctx->cred, - nd->intent.open.flags); - if (ret < 0) - goto out; - } - filp = lookup_instantiate_filp(nd, ctx->path.dentry, do_open); - if (IS_ERR(filp)) - ret = PTR_ERR(filp); - else - nfs_file_set_open_context(filp, ctx); out: - put_nfs_open_context(ctx); - return ret; + return err; } -static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) +int nfs_atomic_open(struct inode *dir, struct dentry *dentry, + struct file *file, unsigned open_flags, + umode_t mode, int *opened) { struct nfs_open_context *ctx; - struct iattr attr; - struct dentry *res = NULL; + struct dentry *res; + struct iattr attr = { .ia_valid = ATTR_OPEN }; struct inode *inode; - int open_flags; + unsigned int lookup_flags = 0; int err; - dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + /* Expect a negative dentry */ + BUG_ON(dentry->d_inode); - /* Check that we are indeed trying to open this file */ - if (!is_atomic_open(nd)) - goto no_open; + dfprintk(VFS, "NFS: atomic_open(%s/%lu), %pd\n", + dir->i_sb->s_id, dir->i_ino, dentry); - if (dentry->d_name.len > NFS_SERVER(dir)->namelen) { - res = ERR_PTR(-ENAMETOOLONG); - goto out; + err = nfs_check_flags(open_flags); + if (err) + return err; + + /* NFS only supports OPEN on regular files */ + if ((open_flags & O_DIRECTORY)) { + if (!d_unhashed(dentry)) { + /* + * Hashed negative dentry with O_DIRECTORY: dentry was + * revalidated and is fine, no need to perform lookup + * again + */ + return -ENOENT; + } + lookup_flags = LOOKUP_OPEN|LOOKUP_DIRECTORY; + goto no_open; } - dentry->d_op = NFS_PROTO(dir)->dentry_ops; - /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash - * the dentry. */ - if (nd->flags & LOOKUP_EXCL) { - d_instantiate(dentry, NULL); - goto out; + if (dentry->d_name.len > NFS_SERVER(dir)->namelen) + return -ENAMETOOLONG; + + if (open_flags & O_CREAT) { + attr.ia_valid |= ATTR_MODE; + attr.ia_mode = mode & ~current_umask(); + } + if (open_flags & O_TRUNC) { + attr.ia_valid |= ATTR_SIZE; + attr.ia_size = 0; } - ctx = nameidata_to_nfs_open_context(dentry, nd); - res = ERR_CAST(ctx); + ctx = create_nfs_open_context(dentry, open_flags); + err = PTR_ERR(ctx); if (IS_ERR(ctx)) goto out; - open_flags = nd->intent.open.flags; - if (nd->flags & LOOKUP_CREATE) { - attr.ia_mode = nd->intent.open.create_mode; - attr.ia_valid = ATTR_MODE; - if (!IS_POSIXACL(dir)) - attr.ia_mode &= ~current_umask(); - } else { - open_flags &= ~(O_EXCL | O_CREAT); - attr.ia_valid = 0; - } - - /* Open the file on the server */ + trace_nfs_atomic_open_enter(dir, ctx, open_flags); nfs_block_sillyrename(dentry->d_parent); - inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr); + inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr, opened); + nfs_unblock_sillyrename(dentry->d_parent); if (IS_ERR(inode)) { - nfs_unblock_sillyrename(dentry->d_parent); + err = PTR_ERR(inode); + trace_nfs_atomic_open_exit(dir, ctx, open_flags, err); put_nfs_open_context(ctx); - switch (PTR_ERR(inode)) { - /* Make a negative dentry */ - case -ENOENT: - d_add(dentry, NULL); - res = NULL; - goto out; - /* This turned out not to be a regular file */ - case -EISDIR: - case -ENOTDIR: + switch (err) { + case -ENOENT: + d_drop(dentry); + d_add(dentry, NULL); + break; + case -EISDIR: + case -ENOTDIR: + goto no_open; + case -ELOOP: + if (!(open_flags & O_NOFOLLOW)) goto no_open; - case -ELOOP: - if (!(nd->intent.open.flags & O_NOFOLLOW)) - goto no_open; + break; /* case -EINVAL: */ - default: - res = ERR_CAST(inode); - goto out; + default: + break; } + goto out; } - res = d_add_unique(dentry, inode); - nfs_unblock_sillyrename(dentry->d_parent); - if (res != NULL) { - dput(ctx->path.dentry); - ctx->path.dentry = dget(res); - dentry = res; - } - err = nfs_intent_set_file(nd, ctx); - if (err < 0) { - if (res != NULL) - dput(res); - return ERR_PTR(err); - } + + err = nfs_finish_open(ctx, ctx->dentry, file, open_flags, opened); + trace_nfs_atomic_open_exit(dir, ctx, open_flags, err); + put_nfs_open_context(ctx); out: - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); - return res; + return err; + no_open: - return nfs_lookup(dir, dentry, nd); + res = nfs_lookup(dir, dentry, lookup_flags); + err = PTR_ERR(res); + if (IS_ERR(res)) + goto out; + + return finish_no_open(file, res); } +EXPORT_SYMBOL_GPL(nfs_atomic_open); -static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) +static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags) { struct dentry *parent = NULL; - struct inode *inode = dentry->d_inode; + struct inode *inode; struct inode *dir; - struct nfs_open_context *ctx; - int openflags, ret = 0; + int ret = 0; + + if (flags & LOOKUP_RCU) + return -ECHILD; - if (!is_atomic_open(nd) || d_mountpoint(dentry)) + if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY)) + goto no_open; + if (d_mountpoint(dentry)) + goto no_open; + if (NFS_SB(dentry->d_sb)->caps & NFS_CAP_ATOMIC_OPEN_V1) goto no_open; + inode = dentry->d_inode; parent = dget_parent(dentry); dir = parent->d_inode; @@ -1395,7 +1552,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) * optimize away revalidation of negative dentries. */ if (inode == NULL) { - if (!nfs_neg_need_reval(dir, dentry, nd)) + if (!nfs_neg_need_reval(dir, dentry, flags)) ret = 1; goto out; } @@ -1403,99 +1560,21 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) /* NFS only supports OPEN on regular files */ if (!S_ISREG(inode->i_mode)) goto no_open_dput; - openflags = nd->intent.open.flags; /* We cannot do exclusive creation on a positive dentry */ - if ((openflags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL)) + if (flags & LOOKUP_EXCL) goto no_open_dput; - /* We can't create new files, or truncate existing ones here */ - openflags &= ~(O_CREAT|O_EXCL|O_TRUNC); - ctx = nameidata_to_nfs_open_context(dentry, nd); - ret = PTR_ERR(ctx); - if (IS_ERR(ctx)) - goto out; - /* - * Note: we're not holding inode->i_mutex and so may be racing with - * operations that change the directory. We therefore save the - * change attribute *before* we do the RPC call. - */ - inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, NULL); - if (IS_ERR(inode)) { - ret = PTR_ERR(inode); - switch (ret) { - case -EPERM: - case -EACCES: - case -EDQUOT: - case -ENOSPC: - case -EROFS: - goto out_put_ctx; - default: - goto out_drop; - } - } - iput(inode); - if (inode != dentry->d_inode) - goto out_drop; + /* Let f_op->open() actually open (and revalidate) the file */ + ret = 1; - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); - ret = nfs_intent_set_file(nd, ctx); - if (ret >= 0) - ret = 1; out: dput(parent); return ret; -out_drop: - d_drop(dentry); - ret = 0; -out_put_ctx: - put_nfs_open_context(ctx); - goto out; no_open_dput: dput(parent); no_open: - return nfs_lookup_revalidate(dentry, nd); -} - -static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) -{ - struct nfs_open_context *ctx = NULL; - struct iattr attr; - int error; - int open_flags = 0; - - dfprintk(VFS, "NFS: create(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); - - attr.ia_mode = mode; - attr.ia_valid = ATTR_MODE; - - if ((nd->flags & LOOKUP_CREATE) != 0) { - open_flags = nd->intent.open.flags; - - ctx = nameidata_to_nfs_open_context(dentry, nd); - error = PTR_ERR(ctx); - if (IS_ERR(ctx)) - goto out_err_drop; - } - - error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx); - if (error != 0) - goto out_put_ctx; - if (ctx != NULL) { - error = nfs_intent_set_file(nd, ctx); - if (error < 0) - goto out_err; - } - return 0; -out_put_ctx: - if (ctx != NULL) - put_nfs_open_context(ctx); -out_err_drop: - d_drop(dentry); -out_err: - return error; + return nfs_lookup_revalidate(dentry, flags); } #endif /* CONFIG_NFSV4 */ @@ -1504,7 +1583,8 @@ out_err: * Code common to create, mkdir, and mknod. */ int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle, - struct nfs_fattr *fattr) + struct nfs_fattr *fattr, + struct nfs4_label *label) { struct dentry *parent = dget_parent(dentry); struct inode *dir = parent->d_inode; @@ -1517,18 +1597,18 @@ int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle, if (dentry->d_inode) goto out; if (fhandle->size == 0) { - error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr); + error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL); if (error) goto out_error; } nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); if (!(fattr->valid & NFS_ATTR_FATTR)) { struct nfs_server *server = NFS_SB(dentry->d_sb); - error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr); + error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr, NULL); if (error < 0) goto out_error; } - inode = nfs_fhget(dentry->d_sb, fhandle, fattr); + inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label); error = PTR_ERR(inode); if (IS_ERR(inode)) goto out_error; @@ -1541,6 +1621,7 @@ out_error: dput(parent); return error; } +EXPORT_SYMBOL_GPL(nfs_instantiate); /* * Following a failed create operation, we drop the dentry rather @@ -1548,19 +1629,22 @@ out_error: * that the operation succeeded on the server, but an error in the * reply path made it appear to have failed. */ -static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) +int nfs_create(struct inode *dir, struct dentry *dentry, + umode_t mode, bool excl) { struct iattr attr; + int open_flags = excl ? O_CREAT | O_EXCL : O_CREAT; int error; - dfprintk(VFS, "NFS: create(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: create(%s/%lu), %pd\n", + dir->i_sb->s_id, dir->i_ino, dentry); attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; - error = NFS_PROTO(dir)->create(dir, dentry, &attr, 0, NULL); + trace_nfs_create_enter(dir, dentry, open_flags); + error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags); + trace_nfs_create_exit(dir, dentry, open_flags, error); if (error != 0) goto out_err; return 0; @@ -1568,18 +1652,19 @@ out_err: d_drop(dentry); return error; } +EXPORT_SYMBOL_GPL(nfs_create); /* * See comments for nfs_proc_create regarding failed operations. */ -static int -nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) +int +nfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) { struct iattr attr; int status; - dfprintk(VFS, "NFS: mknod(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: mknod(%s/%lu), %pd\n", + dir->i_sb->s_id, dir->i_ino, dentry); if (!new_valid_dev(rdev)) return -EINVAL; @@ -1587,7 +1672,9 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; + trace_nfs_mknod_enter(dir, dentry); status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev); + trace_nfs_mknod_exit(dir, dentry, status); if (status != 0) goto out_err; return 0; @@ -1595,22 +1682,25 @@ out_err: d_drop(dentry); return status; } +EXPORT_SYMBOL_GPL(nfs_mknod); /* * See comments for nfs_proc_create regarding failed operations. */ -static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) +int nfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { struct iattr attr; int error; - dfprintk(VFS, "NFS: mkdir(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: mkdir(%s/%lu), %pd\n", + dir->i_sb->s_id, dir->i_ino, dentry); attr.ia_valid = ATTR_MODE; attr.ia_mode = mode | S_IFDIR; + trace_nfs_mkdir_enter(dir, dentry); error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr); + trace_nfs_mkdir_exit(dir, dentry, error); if (error != 0) goto out_err; return 0; @@ -1618,6 +1708,7 @@ out_err: d_drop(dentry); return error; } +EXPORT_SYMBOL_GPL(nfs_mkdir); static void nfs_dentry_handle_enoent(struct dentry *dentry) { @@ -1625,22 +1716,32 @@ static void nfs_dentry_handle_enoent(struct dentry *dentry) d_delete(dentry); } -static int nfs_rmdir(struct inode *dir, struct dentry *dentry) +int nfs_rmdir(struct inode *dir, struct dentry *dentry) { int error; - dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n", - dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: rmdir(%s/%lu), %pd\n", + dir->i_sb->s_id, dir->i_ino, dentry); - error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); - /* Ensure the VFS deletes this inode */ - if (error == 0 && dentry->d_inode != NULL) - clear_nlink(dentry->d_inode); - else if (error == -ENOENT) - nfs_dentry_handle_enoent(dentry); + trace_nfs_rmdir_enter(dir, dentry); + if (dentry->d_inode) { + nfs_wait_on_sillyrename(dentry); + error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); + /* Ensure the VFS deletes this inode */ + switch (error) { + case 0: + clear_nlink(dentry->d_inode); + break; + case -ENOENT: + nfs_dentry_handle_enoent(dentry); + } + } else + error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); + trace_nfs_rmdir_exit(dir, dentry, error); return error; } +EXPORT_SYMBOL_GPL(nfs_rmdir); /* * Remove a file after making sure there are no pending writes, @@ -1655,8 +1756,7 @@ static int nfs_safe_remove(struct dentry *dentry) struct inode *inode = dentry->d_inode; int error = -EBUSY; - dfprintk(VFS, "NFS: safe_remove(%s/%s)\n", - dentry->d_parent->d_name.name, dentry->d_name.name); + dfprintk(VFS, "NFS: safe_remove(%pd2)\n", dentry); /* If the dentry was sillyrenamed, we simply call d_delete() */ if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { @@ -1664,17 +1764,17 @@ static int nfs_safe_remove(struct dentry *dentry) goto out; } + trace_nfs_remove_enter(dir, dentry); if (inode != NULL) { - nfs_inode_return_delegation(inode); + NFS_PROTO(inode)->return_delegation(inode); error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); - /* The VFS may want to delete this inode */ if (error == 0) nfs_drop_nlink(inode); - nfs_mark_for_revalidate(inode); } else error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); if (error == -ENOENT) nfs_dentry_handle_enoent(dentry); + trace_nfs_remove_exit(dir, dentry, error); out: return error; } @@ -1684,37 +1784,38 @@ out: * * If sillyrename() returns 0, we do nothing, otherwise we unlink. */ -static int nfs_unlink(struct inode *dir, struct dentry *dentry) +int nfs_unlink(struct inode *dir, struct dentry *dentry) { int error; int need_rehash = 0; - dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name); + dfprintk(VFS, "NFS: unlink(%s/%lu, %pd)\n", dir->i_sb->s_id, + dir->i_ino, dentry); - spin_lock(&dcache_lock); + trace_nfs_unlink_enter(dir, dentry); spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count) > 1) { + if (d_count(dentry) > 1) { spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); /* Start asynchronous writeout of the inode */ write_inode_now(dentry->d_inode, 0); error = nfs_sillyrename(dir, dentry); - return error; + goto out; } if (!d_unhashed(dentry)) { __d_drop(dentry); need_rehash = 1; } spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); error = nfs_safe_remove(dentry); if (!error || error == -ENOENT) { nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); } else if (need_rehash) d_rehash(dentry); +out: + trace_nfs_unlink_exit(dir, dentry, error); return error; } +EXPORT_SYMBOL_GPL(nfs_unlink); /* * To create a symbolic link, most file systems instantiate a new inode, @@ -1731,17 +1832,16 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry) * now have a new file handle and can instantiate an in-core NFS inode * and move the raw page into its mapping. */ -static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) +int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { - struct pagevec lru_pvec; struct page *page; char *kaddr; struct iattr attr; unsigned int pathlen = strlen(symname); int error; - dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s)\n", dir->i_sb->s_id, - dir->i_ino, dentry->d_name.name, symname); + dfprintk(VFS, "NFS: symlink(%s/%lu, %pd, %s)\n", dir->i_sb->s_id, + dir->i_ino, dentry, symname); if (pathlen > PAGE_SIZE) return -ENAMETOOLONG; @@ -1753,17 +1853,19 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym if (!page) return -ENOMEM; - kaddr = kmap_atomic(page, KM_USER0); + kaddr = kmap_atomic(page); memcpy(kaddr, symname, pathlen); if (pathlen < PAGE_SIZE) memset(kaddr + pathlen, 0, PAGE_SIZE - pathlen); - kunmap_atomic(kaddr, KM_USER0); + kunmap_atomic(kaddr); + trace_nfs_symlink_enter(dir, dentry); error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr); + trace_nfs_symlink_exit(dir, dentry, error); if (error != 0) { - dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n", + dfprintk(VFS, "NFS: symlink(%s/%lu, %pd, %s) error %d\n", dir->i_sb->s_id, dir->i_ino, - dentry->d_name.name, symname, error); + dentry, symname, error); d_drop(dentry); __free_page(page); return error; @@ -1773,30 +1875,33 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym * No big deal if we can't add this page to the page cache here. * READLINK will get the missing page from the server if needed. */ - pagevec_init(&lru_pvec, 0); - if (!add_to_page_cache(page, dentry->d_inode->i_mapping, 0, + if (!add_to_page_cache_lru(page, dentry->d_inode->i_mapping, 0, GFP_KERNEL)) { - pagevec_add(&lru_pvec, page); - pagevec_lru_add_file(&lru_pvec); SetPageUptodate(page); unlock_page(page); + /* + * add_to_page_cache_lru() grabs an extra page refcount. + * Drop it here to avoid leaking this page later. + */ + page_cache_release(page); } else __free_page(page); return 0; } +EXPORT_SYMBOL_GPL(nfs_symlink); -static int +int nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { struct inode *inode = old_dentry->d_inode; int error; - dfprintk(VFS, "NFS: link(%s/%s -> %s/%s)\n", - old_dentry->d_parent->d_name.name, old_dentry->d_name.name, - dentry->d_parent->d_name.name, dentry->d_name.name); + dfprintk(VFS, "NFS: link(%pd2 -> %pd2)\n", + old_dentry, dentry); - nfs_inode_return_delegation(inode); + trace_nfs_link_enter(inode, dir, dentry); + NFS_PROTO(inode)->return_delegation(inode); d_drop(dentry); error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name); @@ -1804,8 +1909,10 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) ihold(inode); d_add(dentry, inode); } + trace_nfs_link_exit(inode, dir, dentry, error); return error; } +EXPORT_SYMBOL_GPL(nfs_link); /* * RENAME @@ -1831,19 +1938,20 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) * If these conditions are met, we can drop the dentries before doing * the rename. */ -static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, +int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { struct inode *old_inode = old_dentry->d_inode; struct inode *new_inode = new_dentry->d_inode; struct dentry *dentry = NULL, *rehash = NULL; + struct rpc_task *task; int error = -EBUSY; - dfprintk(VFS, "NFS: rename(%s/%s -> %s/%s, ct=%d)\n", - old_dentry->d_parent->d_name.name, old_dentry->d_name.name, - new_dentry->d_parent->d_name.name, new_dentry->d_name.name, - atomic_read(&new_dentry->d_count)); + dfprintk(VFS, "NFS: rename(%pd2 -> %pd2, ct=%d)\n", + old_dentry, new_dentry, + d_count(new_dentry)); + trace_nfs_rename_enter(old_dir, old_dentry, new_dir, new_dentry); /* * For non-directories, check whether the target is busy and if so, * make a copy of the dentry and then do a silly-rename. If the @@ -1860,7 +1968,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, rehash = new_dentry; } - if (atomic_read(&new_dentry->d_count) > 2) { + if (d_count(new_dentry) > 2) { int err; /* copy the target dentry's name */ @@ -1880,16 +1988,26 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, } } - nfs_inode_return_delegation(old_inode); + NFS_PROTO(old_inode)->return_delegation(old_inode); if (new_inode != NULL) - nfs_inode_return_delegation(new_inode); + NFS_PROTO(new_inode)->return_delegation(new_inode); + + task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry, NULL); + if (IS_ERR(task)) { + error = PTR_ERR(task); + goto out; + } - error = NFS_PROTO(old_dir)->rename(old_dir, &old_dentry->d_name, - new_dir, &new_dentry->d_name); + error = rpc_wait_for_completion_task(task); + if (error == 0) + error = task->tk_status; + rpc_put_task(task); nfs_mark_for_revalidate(old_inode); out: if (rehash) d_rehash(rehash); + trace_nfs_rename_exit(old_dir, old_dentry, + new_dir, new_dentry, error); if (!error) { if (new_inode != NULL) nfs_drop_nlink(new_inode); @@ -1904,6 +2022,7 @@ out: dput(dentry); return error; } +EXPORT_SYMBOL_GPL(nfs_rename); static DEFINE_SPINLOCK(nfs_access_lru_lock); static LIST_HEAD(nfs_access_lru_list); @@ -1913,9 +2032,9 @@ static void nfs_access_free_entry(struct nfs_access_entry *entry) { put_rpccred(entry->cred); kfree(entry); - smp_mb__before_atomic_dec(); + smp_mb__before_atomic(); atomic_long_dec(&nfs_access_nr_entries); - smp_mb__after_atomic_dec(); + smp_mb__after_atomic(); } static void nfs_access_free_list(struct list_head *head) @@ -1929,14 +2048,18 @@ static void nfs_access_free_list(struct list_head *head) } } -int nfs_access_cache_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask) +unsigned long +nfs_access_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { LIST_HEAD(head); struct nfs_inode *nfsi, *next; struct nfs_access_entry *cache; + int nr_to_scan = sc->nr_to_scan; + gfp_t gfp_mask = sc->gfp_mask; + long freed = 0; if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL) - return (nr_to_scan == 0) ? 0 : -1; + return SHRINK_STOP; spin_lock(&nfs_access_lru_lock); list_for_each_entry_safe(nfsi, next, &nfs_access_lru_list, access_cache_inode_lru) { @@ -1952,21 +2075,28 @@ int nfs_access_cache_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp struct nfs_access_entry, lru); list_move(&cache->lru, &head); rb_erase(&cache->rb_node, &nfsi->access_cache); + freed++; if (!list_empty(&nfsi->access_cache_entry_lru)) list_move_tail(&nfsi->access_cache_inode_lru, &nfs_access_lru_list); else { remove_lru_entry: list_del_init(&nfsi->access_cache_inode_lru); - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); } spin_unlock(&inode->i_lock); } spin_unlock(&nfs_access_lru_lock); nfs_access_free_list(&head); - return (atomic_long_read(&nfs_access_nr_entries) / 100) * sysctl_vfs_cache_pressure; + return freed; +} + +unsigned long +nfs_access_cache_count(struct shrinker *shrink, struct shrink_control *sc) +{ + return vfs_pressure_ratio(atomic_long_read(&nfs_access_nr_entries)); } static void __nfs_access_zap_cache(struct nfs_inode *nfsi, struct list_head *head) @@ -2001,6 +2131,7 @@ void nfs_access_zap_cache(struct inode *inode) spin_unlock(&nfs_access_lru_lock); nfs_access_free_list(&head); } +EXPORT_SYMBOL_GPL(nfs_access_zap_cache); static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, struct rpc_cred *cred) { @@ -2088,7 +2219,7 @@ found: nfs_access_free_entry(entry); } -static void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) +void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) { struct nfs_access_entry *cache = kmalloc(sizeof(*cache), GFP_KERNEL); if (cache == NULL) @@ -2101,9 +2232,9 @@ static void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *s nfs_access_add_rbtree(inode, cache); /* Update accounting */ - smp_mb__before_atomic_inc(); + smp_mb__before_atomic(); atomic_long_inc(&nfs_access_nr_entries); - smp_mb__after_atomic_inc(); + smp_mb__after_atomic(); /* Add inode to global LRU list */ if (!test_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags)) { @@ -2114,15 +2245,31 @@ static void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *s spin_unlock(&nfs_access_lru_lock); } } +EXPORT_SYMBOL_GPL(nfs_access_add_cache); + +void nfs_access_set_mask(struct nfs_access_entry *entry, u32 access_result) +{ + entry->mask = 0; + if (access_result & NFS4_ACCESS_READ) + entry->mask |= MAY_READ; + if (access_result & + (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) + entry->mask |= MAY_WRITE; + if (access_result & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) + entry->mask |= MAY_EXEC; +} +EXPORT_SYMBOL_GPL(nfs_access_set_mask); static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) { struct nfs_access_entry cache; int status; + trace_nfs_access_enter(inode); + status = nfs_access_get_cached(inode, cred, &cache); if (status == 0) - goto out; + goto out_cached; /* Be clever: ask server to check for all possible rights */ cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; @@ -2135,25 +2282,31 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) if (!S_ISDIR(inode->i_mode)) set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); } - return status; + goto out; } nfs_access_add_cache(inode, &cache); +out_cached: + if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0) + status = -EACCES; out: - if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0) - return 0; - return -EACCES; + trace_nfs_access_exit(inode, status); + return status; } static int nfs_open_permission_mask(int openflags) { int mask = 0; - if (openflags & FMODE_READ) - mask |= MAY_READ; - if (openflags & FMODE_WRITE) - mask |= MAY_WRITE; - if (openflags & FMODE_EXEC) - mask |= MAY_EXEC; + if (openflags & __FMODE_EXEC) { + /* ONLY check exec rights */ + mask = MAY_EXEC; + } else { + if ((openflags & O_ACCMODE) != O_WRONLY) + mask |= MAY_READ; + if ((openflags & O_ACCMODE) != O_RDONLY) + mask |= MAY_WRITE; + } + return mask; } @@ -2161,12 +2314,16 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags) { return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags)); } +EXPORT_SYMBOL_GPL(nfs_may_open); int nfs_permission(struct inode *inode, int mask) { struct rpc_cred *cred; int res = 0; + if (mask & MAY_NOT_BLOCK) + return -ECHILD; + nfs_inc_stats(inode, NFSIOS_VFSACCESS); if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0) @@ -2179,11 +2336,6 @@ int nfs_permission(struct inode *inode, int mask) case S_IFLNK: goto out; case S_IFREG: - /* NFSv4 has atomic_open... */ - if (nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN) - && (mask & MAY_OPEN) - && !(mask & MAY_EXEC)) - goto out; break; case S_IFDIR: /* @@ -2208,15 +2360,16 @@ out: if (!res && (mask & MAY_EXEC) && !execute_ok(inode)) res = -EACCES; - dfprintk(VFS, "NFS: permission(%s/%ld), mask=0x%x, res=%d\n", + dfprintk(VFS, "NFS: permission(%s/%lu), mask=0x%x, res=%d\n", inode->i_sb->s_id, inode->i_ino, mask, res); return res; out_notsup: res = nfs_revalidate_inode(NFS_SERVER(inode), inode); if (res == 0) - res = generic_permission(inode, mask, NULL); + res = generic_permission(inode, mask); goto out; } +EXPORT_SYMBOL_GPL(nfs_permission); /* * Local variables: diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 84d3c8b9020..f11b9eed0de 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -45,17 +45,19 @@ #include <linux/pagemap.h> #include <linux/kref.h> #include <linux/slab.h> +#include <linux/task_io_accounting_ops.h> +#include <linux/module.h> #include <linux/nfs_fs.h> #include <linux/nfs_page.h> #include <linux/sunrpc/clnt.h> -#include <asm/system.h> #include <asm/uaccess.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include "internal.h" #include "iostat.h" +#include "pnfs.h" #define NFSDBG_FACILITY NFSDBG_VFS @@ -77,20 +79,24 @@ struct nfs_direct_req { atomic_t io_count; /* i/os we're waiting for */ spinlock_t lock; /* protect completion state */ ssize_t count, /* bytes actually processed */ + bytes_left, /* bytes left to be sent */ error; /* any reported error */ struct completion completion; /* wait for i/o completion */ /* commit state */ - struct list_head rewrite_list; /* saved nfs_write_data structs */ - struct nfs_write_data * commit_data; /* special write_data for commits */ + struct nfs_mds_commit_info mds_cinfo; /* Storage for cinfo */ + struct pnfs_ds_commit_info ds_cinfo; /* Storage for cinfo */ + struct work_struct work; int flags; #define NFS_ODIRECT_DO_COMMIT (1) /* an unstable reply was received */ #define NFS_ODIRECT_RESCHED_WRITES (2) /* write verification failed */ struct nfs_writeverf verf; /* unstable write verifier */ }; +static const struct nfs_pgio_completion_ops nfs_direct_write_completion_ops; +static const struct nfs_commit_completion_ops nfs_direct_commit_completion_ops; static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode); -static const struct rpc_call_ops nfs_write_direct_ops; +static void nfs_direct_write_schedule_work(struct work_struct *work); static inline void get_dreq(struct nfs_direct_req *dreq) { @@ -102,6 +108,97 @@ static inline int put_dreq(struct nfs_direct_req *dreq) return atomic_dec_and_test(&dreq->io_count); } +/* + * nfs_direct_select_verf - select the right verifier + * @dreq - direct request possibly spanning multiple servers + * @ds_clp - nfs_client of data server or NULL if MDS / non-pnfs + * @ds_idx - index of data server in data server list, only valid if ds_clp set + * + * returns the correct verifier to use given the role of the server + */ +static struct nfs_writeverf * +nfs_direct_select_verf(struct nfs_direct_req *dreq, + struct nfs_client *ds_clp, + int ds_idx) +{ + struct nfs_writeverf *verfp = &dreq->verf; + +#ifdef CONFIG_NFS_V4_1 + if (ds_clp) { + /* pNFS is in use, use the DS verf */ + if (ds_idx >= 0 && ds_idx < dreq->ds_cinfo.nbuckets) + verfp = &dreq->ds_cinfo.buckets[ds_idx].direct_verf; + else + WARN_ON_ONCE(1); + } +#endif + return verfp; +} + + +/* + * nfs_direct_set_hdr_verf - set the write/commit verifier + * @dreq - direct request possibly spanning multiple servers + * @hdr - pageio header to validate against previously seen verfs + * + * Set the server's (MDS or DS) "seen" verifier + */ +static void nfs_direct_set_hdr_verf(struct nfs_direct_req *dreq, + struct nfs_pgio_header *hdr) +{ + struct nfs_writeverf *verfp; + + verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp, + hdr->data->ds_idx); + WARN_ON_ONCE(verfp->committed >= 0); + memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf)); + WARN_ON_ONCE(verfp->committed < 0); +} + +/* + * nfs_direct_cmp_hdr_verf - compare verifier for pgio header + * @dreq - direct request possibly spanning multiple servers + * @hdr - pageio header to validate against previously seen verf + * + * set the server's "seen" verf if not initialized. + * returns result of comparison between @hdr->verf and the "seen" + * verf of the server used by @hdr (DS or MDS) + */ +static int nfs_direct_set_or_cmp_hdr_verf(struct nfs_direct_req *dreq, + struct nfs_pgio_header *hdr) +{ + struct nfs_writeverf *verfp; + + verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp, + hdr->data->ds_idx); + if (verfp->committed < 0) { + nfs_direct_set_hdr_verf(dreq, hdr); + return 0; + } + return memcmp(verfp, &hdr->verf, sizeof(struct nfs_writeverf)); +} + +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) +/* + * nfs_direct_cmp_commit_data_verf - compare verifier for commit data + * @dreq - direct request possibly spanning multiple servers + * @data - commit data to validate against previously seen verf + * + * returns result of comparison between @data->verf and the verf of + * the server used by @data (DS or MDS) + */ +static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq, + struct nfs_commit_data *data) +{ + struct nfs_writeverf *verfp; + + verfp = nfs_direct_select_verf(dreq, data->ds_clp, + data->ds_commit_index); + WARN_ON_ONCE(verfp->committed < 0); + return memcmp(verfp, &data->verf, sizeof(struct nfs_writeverf)); +} +#endif + /** * nfs_direct_IO - NFS address space operation for direct I/O * @rw: direction (read or write) @@ -111,33 +208,26 @@ static inline int put_dreq(struct nfs_direct_req *dreq) * @nr_segs: size of iovec array * * The presence of this routine in the address space ops vector means - * the NFS client supports direct I/O. However, we shunt off direct - * read and write requests before the VFS gets them, so this method - * should never be called. + * the NFS client supports direct I/O. However, for most direct IO, we + * shunt off direct read and write requests before the VFS gets them, + * so this method is only ever called for swap. */ -ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t pos, unsigned long nr_segs) +ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos) { - dprintk("NFS: nfs_direct_IO (%s) off/no(%Ld/%lu) EINVAL\n", - iocb->ki_filp->f_path.dentry->d_name.name, - (long long) pos, nr_segs); +#ifndef CONFIG_NFS_SWAP + dprintk("NFS: nfs_direct_IO (%pD) off/no(%Ld/%lu) EINVAL\n", + iocb->ki_filp, (long long) pos, iter->nr_segs); return -EINVAL; -} - -static void nfs_direct_dirty_pages(struct page **pages, unsigned int pgbase, size_t count) -{ - unsigned int npages; - unsigned int i; +#else + VM_BUG_ON(iocb->ki_nbytes != PAGE_SIZE); - if (count == 0) - return; - pages += (pgbase >> PAGE_SHIFT); - npages = (count + (pgbase & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT; - for (i = 0; i < npages; i++) { - struct page *page = pages[i]; - if (!PageCompound(page)) - set_page_dirty(page); - } + if (rw == READ || rw == KERNEL_READ) + return nfs_file_direct_read(iocb, iter, pos, + rw == READ ? true : false); + return nfs_file_direct_write(iocb, iter, pos, + rw == WRITE ? true : false); +#endif /* CONFIG_NFS_SWAP */ } static void nfs_direct_release_pages(struct page **pages, unsigned int npages) @@ -147,26 +237,31 @@ static void nfs_direct_release_pages(struct page **pages, unsigned int npages) page_cache_release(pages[i]); } +void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, + struct nfs_direct_req *dreq) +{ + cinfo->lock = &dreq->lock; + cinfo->mds = &dreq->mds_cinfo; + cinfo->ds = &dreq->ds_cinfo; + cinfo->dreq = dreq; + cinfo->completion_ops = &nfs_direct_commit_completion_ops; +} + static inline struct nfs_direct_req *nfs_direct_req_alloc(void) { struct nfs_direct_req *dreq; - dreq = kmem_cache_alloc(nfs_direct_cachep, GFP_KERNEL); + dreq = kmem_cache_zalloc(nfs_direct_cachep, GFP_KERNEL); if (!dreq) return NULL; kref_init(&dreq->kref); kref_get(&dreq->kref); init_completion(&dreq->completion); - INIT_LIST_HEAD(&dreq->rewrite_list); - dreq->iocb = NULL; - dreq->ctx = NULL; - dreq->l_ctx = NULL; + INIT_LIST_HEAD(&dreq->mds_cinfo.list); + dreq->verf.committed = NFS_INVALID_STABLE_HOW; /* not set yet */ + INIT_WORK(&dreq->work, nfs_direct_write_schedule_work); spin_lock_init(&dreq->lock); - atomic_set(&dreq->io_count, 0); - dreq->count = 0; - dreq->error = 0; - dreq->flags = 0; return dreq; } @@ -187,6 +282,12 @@ static void nfs_direct_req_release(struct nfs_direct_req *dreq) kref_put(&dreq->kref, nfs_direct_req_free); } +ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq) +{ + return dreq->bytes_left; +} +EXPORT_SYMBOL_GPL(nfs_dreq_bytes_left); + /* * Collects and returns the final error value/byte-count. */ @@ -213,62 +314,97 @@ out: * Synchronous I/O uses a stack-allocated iocb. Thus we can't trust * the iocb is still valid here if this is a synchronous request. */ -static void nfs_direct_complete(struct nfs_direct_req *dreq) +static void nfs_direct_complete(struct nfs_direct_req *dreq, bool write) { + struct inode *inode = dreq->inode; + + if (dreq->iocb && write) { + loff_t pos = dreq->iocb->ki_pos + dreq->count; + + spin_lock(&inode->i_lock); + if (i_size_read(inode) < pos) + i_size_write(inode, pos); + spin_unlock(&inode->i_lock); + } + + if (write) + nfs_zap_mapping(inode, inode->i_mapping); + + inode_dio_done(inode); + if (dreq->iocb) { long res = (long) dreq->error; if (!res) res = (long) dreq->count; aio_complete(dreq->iocb, res, 0); } + complete_all(&dreq->completion); nfs_direct_req_release(dreq); } -/* - * We must hold a reference to all the pages in this direct read request - * until the RPCs complete. This could be long *after* we are woken up in - * nfs_direct_wait (for instance, if someone hits ^C on a slow server). - */ -static void nfs_direct_read_result(struct rpc_task *task, void *calldata) +static void nfs_direct_readpage_release(struct nfs_page *req) { - struct nfs_read_data *data = calldata; - - nfs_readpage_result(task, data); + dprintk("NFS: direct read done (%s/%llu %d@%lld)\n", + req->wb_context->dentry->d_inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(req->wb_context->dentry->d_inode), + req->wb_bytes, + (long long)req_offset(req)); + nfs_release_request(req); } -static void nfs_direct_read_release(void *calldata) +static void nfs_direct_read_completion(struct nfs_pgio_header *hdr) { + unsigned long bytes = 0; + struct nfs_direct_req *dreq = hdr->dreq; - struct nfs_read_data *data = calldata; - struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; - int status = data->task.tk_status; + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) + goto out_put; spin_lock(&dreq->lock); - if (unlikely(status < 0)) { - dreq->error = status; - spin_unlock(&dreq->lock); - } else { - dreq->count += data->res.count; - spin_unlock(&dreq->lock); - nfs_direct_dirty_pages(data->pagevec, - data->args.pgbase, - data->res.count); - } - nfs_direct_release_pages(data->pagevec, data->npages); + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && (hdr->good_bytes == 0)) + dreq->error = hdr->error; + else + dreq->count += hdr->good_bytes; + spin_unlock(&dreq->lock); + + while (!list_empty(&hdr->pages)) { + struct nfs_page *req = nfs_list_entry(hdr->pages.next); + struct page *page = req->wb_page; + if (!PageCompound(page) && bytes < hdr->good_bytes) + set_page_dirty(page); + bytes += req->wb_bytes; + nfs_list_remove_request(req); + nfs_direct_readpage_release(req); + } +out_put: if (put_dreq(dreq)) - nfs_direct_complete(dreq); - nfs_readdata_free(data); + nfs_direct_complete(dreq, false); + hdr->release(hdr); +} + +static void nfs_read_sync_pgio_error(struct list_head *head) +{ + struct nfs_page *req; + + while (!list_empty(head)) { + req = nfs_list_entry(head->next); + nfs_list_remove_request(req); + nfs_release_request(req); + } } -static const struct rpc_call_ops nfs_read_direct_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_read_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_direct_read_result, - .rpc_release = nfs_direct_read_release, +static void nfs_direct_pgio_init(struct nfs_pgio_header *hdr) +{ + get_dreq(hdr->dreq); +} + +static const struct nfs_pgio_completion_ops nfs_direct_read_completion_ops = { + .error_cleanup = nfs_read_sync_pgio_error, + .init_hdr = nfs_direct_pgio_init, + .completion = nfs_direct_read_completion, }; /* @@ -278,331 +414,272 @@ static const struct rpc_call_ops nfs_read_direct_ops = { * handled automatically by nfs_direct_read_result(). Otherwise, if * no requests have been sent, just return an error. */ -static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq, - const struct iovec *iov, - loff_t pos) -{ - struct nfs_open_context *ctx = dreq->ctx; - struct inode *inode = ctx->path.dentry->d_inode; - unsigned long user_addr = (unsigned long)iov->iov_base; - size_t count = iov->iov_len; - size_t rsize = NFS_SERVER(inode)->rsize; - struct rpc_task *task; - struct rpc_message msg = { - .rpc_cred = ctx->cred, - }; - struct rpc_task_setup task_setup_data = { - .rpc_client = NFS_CLIENT(inode), - .rpc_message = &msg, - .callback_ops = &nfs_read_direct_ops, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, - }; - unsigned int pgbase; - int result; - ssize_t started = 0; - - do { - struct nfs_read_data *data; - size_t bytes; - - pgbase = user_addr & ~PAGE_MASK; - bytes = min(rsize,count); - - result = -ENOMEM; - data = nfs_readdata_alloc(nfs_page_array_len(pgbase, bytes)); - if (unlikely(!data)) - break; - - down_read(¤t->mm->mmap_sem); - result = get_user_pages(current, current->mm, user_addr, - data->npages, 1, 0, data->pagevec, NULL); - up_read(¤t->mm->mmap_sem); - if (result < 0) { - nfs_readdata_free(data); - break; - } - if ((unsigned)result < data->npages) { - bytes = result * PAGE_SIZE; - if (bytes <= pgbase) { - nfs_direct_release_pages(data->pagevec, result); - nfs_readdata_free(data); - break; - } - bytes -= pgbase; - data->npages = result; - } - - get_dreq(dreq); - - data->req = (struct nfs_page *) dreq; - data->inode = inode; - data->cred = msg.rpc_cred; - data->args.fh = NFS_FH(inode); - data->args.context = ctx; - data->args.lock_context = dreq->l_ctx; - data->args.offset = pos; - data->args.pgbase = pgbase; - data->args.pages = data->pagevec; - data->args.count = bytes; - data->res.fattr = &data->fattr; - data->res.eof = 0; - data->res.count = bytes; - nfs_fattr_init(&data->fattr); - msg.rpc_argp = &data->args; - msg.rpc_resp = &data->res; - - task_setup_data.task = &data->task; - task_setup_data.callback_data = data; - NFS_PROTO(inode)->read_setup(data, &msg); - - task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) - break; - rpc_put_task(task); - - dprintk("NFS: %5u initiated direct read call " - "(req %s/%Ld, %zu bytes @ offset %Lu)\n", - data->task.tk_pid, - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - bytes, - (unsigned long long)data->args.offset); - - started += bytes; - user_addr += bytes; - pos += bytes; - /* FIXME: Remove this unnecessary math from final patch */ - pgbase += bytes; - pgbase &= ~PAGE_MASK; - BUG_ON(pgbase != (user_addr & ~PAGE_MASK)); - - count -= bytes; - } while (count != 0); - - if (started) - return started; - return result < 0 ? (ssize_t) result : -EFAULT; -} static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq, - const struct iovec *iov, - unsigned long nr_segs, + struct iov_iter *iter, loff_t pos) { + struct nfs_pageio_descriptor desc; + struct inode *inode = dreq->inode; ssize_t result = -EINVAL; size_t requested_bytes = 0; - unsigned long seg; + size_t rsize = max_t(size_t, NFS_SERVER(inode)->rsize, PAGE_SIZE); + nfs_pageio_init_read(&desc, dreq->inode, false, + &nfs_direct_read_completion_ops); get_dreq(dreq); + desc.pg_dreq = dreq; + atomic_inc(&inode->i_dio_count); + + while (iov_iter_count(iter)) { + struct page **pagevec; + size_t bytes; + size_t pgbase; + unsigned npages, i; - for (seg = 0; seg < nr_segs; seg++) { - const struct iovec *vec = &iov[seg]; - result = nfs_direct_read_schedule_segment(dreq, vec, pos); + result = iov_iter_get_pages_alloc(iter, &pagevec, + rsize, &pgbase); if (result < 0) break; - requested_bytes += result; - if ((size_t)result < vec->iov_len) + + bytes = result; + iov_iter_advance(iter, bytes); + npages = (result + pgbase + PAGE_SIZE - 1) / PAGE_SIZE; + for (i = 0; i < npages; i++) { + struct nfs_page *req; + unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase); + /* XXX do we need to do the eof zeroing found in async_filler? */ + req = nfs_create_request(dreq->ctx, pagevec[i], NULL, + pgbase, req_len); + if (IS_ERR(req)) { + result = PTR_ERR(req); + break; + } + req->wb_index = pos >> PAGE_SHIFT; + req->wb_offset = pos & ~PAGE_MASK; + if (!nfs_pageio_add_request(&desc, req)) { + result = desc.pg_error; + nfs_release_request(req); + break; + } + pgbase = 0; + bytes -= req_len; + requested_bytes += req_len; + pos += req_len; + dreq->bytes_left -= req_len; + } + nfs_direct_release_pages(pagevec, npages); + kvfree(pagevec); + if (result < 0) break; - pos += vec->iov_len; } - if (put_dreq(dreq)) - nfs_direct_complete(dreq); + nfs_pageio_complete(&desc); - if (requested_bytes != 0) - return 0; + /* + * If no bytes were started, return the error, and let the + * generic layer handle the completion. + */ + if (requested_bytes == 0) { + inode_dio_done(inode); + nfs_direct_req_release(dreq); + return result < 0 ? result : -EIO; + } - if (result < 0) - return result; - return -EIO; + if (put_dreq(dreq)) + nfs_direct_complete(dreq, false); + return 0; } -static ssize_t nfs_direct_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +/** + * nfs_file_direct_read - file direct read operation for NFS files + * @iocb: target I/O control block + * @iter: vector of user buffers into which to read data + * @pos: byte offset in file where reading starts + * + * We use this function for direct reads instead of calling + * generic_file_aio_read() in order to avoid gfar's check to see if + * the request starts before the end of the file. For that check + * to work, we must generate a GETATTR before each direct read, and + * even then there is a window between the GETATTR and the subsequent + * READ where the file size could change. Our preference is simply + * to do all reads the application wants, and the server will take + * care of managing the end of file boundary. + * + * This function also eliminates unnecessarily updating the file's + * atime locally, as the NFS server sets the file's atime, and this + * client must read the updated atime from the server back into its + * cache. + */ +ssize_t nfs_file_direct_read(struct kiocb *iocb, struct iov_iter *iter, + loff_t pos, bool uio) { - ssize_t result = -ENOMEM; - struct inode *inode = iocb->ki_filp->f_mapping->host; + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; struct nfs_direct_req *dreq; + struct nfs_lock_context *l_ctx; + ssize_t result = -EINVAL; + size_t count = iov_iter_count(iter); + nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count); + + dfprintk(FILE, "NFS: direct read(%pD2, %zd@%Ld)\n", + file, count, (long long) pos); + + result = 0; + if (!count) + goto out; + mutex_lock(&inode->i_mutex); + result = nfs_sync_mapping(mapping); + if (result) + goto out_unlock; + + task_io_account_read(count); + + result = -ENOMEM; dreq = nfs_direct_req_alloc(); if (dreq == NULL) - goto out; + goto out_unlock; dreq->inode = inode; + dreq->bytes_left = count; dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp)); - dreq->l_ctx = nfs_get_lock_context(dreq->ctx); - if (dreq->l_ctx == NULL) + l_ctx = nfs_get_lock_context(dreq->ctx); + if (IS_ERR(l_ctx)) { + result = PTR_ERR(l_ctx); goto out_release; + } + dreq->l_ctx = l_ctx; if (!is_sync_kiocb(iocb)) dreq->iocb = iocb; - result = nfs_direct_read_schedule_iovec(dreq, iov, nr_segs, pos); - if (!result) + NFS_I(inode)->read_io += count; + result = nfs_direct_read_schedule_iovec(dreq, iter, pos); + + mutex_unlock(&inode->i_mutex); + + if (!result) { result = nfs_direct_wait(dreq); + if (result > 0) + iocb->ki_pos = pos + result; + } + + nfs_direct_req_release(dreq); + return result; + out_release: nfs_direct_req_release(dreq); +out_unlock: + mutex_unlock(&inode->i_mutex); out: return result; } -static void nfs_direct_free_writedata(struct nfs_direct_req *dreq) -{ - while (!list_empty(&dreq->rewrite_list)) { - struct nfs_write_data *data = list_entry(dreq->rewrite_list.next, struct nfs_write_data, pages); - list_del(&data->pages); - nfs_direct_release_pages(data->pagevec, data->npages); - nfs_writedata_free(data); - } -} - -#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq) { - struct inode *inode = dreq->inode; - struct list_head *p; - struct nfs_write_data *data; - struct rpc_task *task; - struct rpc_message msg = { - .rpc_cred = dreq->ctx->cred, - }; - struct rpc_task_setup task_setup_data = { - .rpc_client = NFS_CLIENT(inode), - .rpc_message = &msg, - .callback_ops = &nfs_write_direct_ops, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, - }; + struct nfs_pageio_descriptor desc; + struct nfs_page *req, *tmp; + LIST_HEAD(reqs); + struct nfs_commit_info cinfo; + LIST_HEAD(failed); + + nfs_init_cinfo_from_dreq(&cinfo, dreq); + pnfs_recover_commit_reqs(dreq->inode, &reqs, &cinfo); + spin_lock(cinfo.lock); + nfs_scan_commit_list(&cinfo.mds->list, &reqs, &cinfo, 0); + spin_unlock(cinfo.lock); dreq->count = 0; get_dreq(dreq); - list_for_each(p, &dreq->rewrite_list) { - data = list_entry(p, struct nfs_write_data, pages); - - get_dreq(dreq); - - /* Use stable writes */ - data->args.stable = NFS_FILE_SYNC; - - /* - * Reset data->res. - */ - nfs_fattr_init(&data->fattr); - data->res.count = data->args.count; - memset(&data->verf, 0, sizeof(data->verf)); - - /* - * Reuse data->task; data->args should not have changed - * since the original request was sent. - */ - task_setup_data.task = &data->task; - task_setup_data.callback_data = data; - msg.rpc_argp = &data->args; - msg.rpc_resp = &data->res; - NFS_PROTO(inode)->write_setup(data, &msg); - - /* - * We're called via an RPC callback, so BKL is already held. - */ - task = rpc_run_task(&task_setup_data); - if (!IS_ERR(task)) - rpc_put_task(task); - - dprintk("NFS: %5u rescheduled direct write call (req %s/%Ld, %u bytes @ offset %Lu)\n", - data->task.tk_pid, - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - data->args.count, - (unsigned long long)data->args.offset); + nfs_pageio_init_write(&desc, dreq->inode, FLUSH_STABLE, false, + &nfs_direct_write_completion_ops); + desc.pg_dreq = dreq; + + list_for_each_entry_safe(req, tmp, &reqs, wb_list) { + if (!nfs_pageio_add_request(&desc, req)) { + nfs_list_remove_request(req); + nfs_list_add_request(req, &failed); + spin_lock(cinfo.lock); + dreq->flags = 0; + dreq->error = -EIO; + spin_unlock(cinfo.lock); + } + nfs_release_request(req); } + nfs_pageio_complete(&desc); - if (put_dreq(dreq)) - nfs_direct_write_complete(dreq, inode); -} - -static void nfs_direct_commit_result(struct rpc_task *task, void *calldata) -{ - struct nfs_write_data *data = calldata; + while (!list_empty(&failed)) { + req = nfs_list_entry(failed.next); + nfs_list_remove_request(req); + nfs_unlock_and_release_request(req); + } - /* Call the NFS version-specific code */ - NFS_PROTO(data->inode)->commit_done(task, data); + if (put_dreq(dreq)) + nfs_direct_write_complete(dreq, dreq->inode); } -static void nfs_direct_commit_release(void *calldata) +static void nfs_direct_commit_complete(struct nfs_commit_data *data) { - struct nfs_write_data *data = calldata; - struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; + struct nfs_direct_req *dreq = data->dreq; + struct nfs_commit_info cinfo; + struct nfs_page *req; int status = data->task.tk_status; + nfs_init_cinfo_from_dreq(&cinfo, dreq); if (status < 0) { dprintk("NFS: %5u commit failed with error %d.\n", - data->task.tk_pid, status); + data->task.tk_pid, status); dreq->flags = NFS_ODIRECT_RESCHED_WRITES; - } else if (memcmp(&dreq->verf, &data->verf, sizeof(data->verf))) { + } else if (nfs_direct_cmp_commit_data_verf(dreq, data)) { dprintk("NFS: %5u commit verify failed\n", data->task.tk_pid); dreq->flags = NFS_ODIRECT_RESCHED_WRITES; } dprintk("NFS: %5u commit returned %d\n", data->task.tk_pid, status); - nfs_direct_write_complete(dreq, data->inode); - nfs_commit_free(data); + while (!list_empty(&data->pages)) { + req = nfs_list_entry(data->pages.next); + nfs_list_remove_request(req); + if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) { + /* Note the rewrite will go through mds */ + nfs_mark_request_commit(req, NULL, &cinfo); + } else + nfs_release_request(req); + nfs_unlock_and_release_request(req); + } + + if (atomic_dec_and_test(&cinfo.mds->rpcs_out)) + nfs_direct_write_complete(dreq, data->inode); +} + +static void nfs_direct_error_cleanup(struct nfs_inode *nfsi) +{ + /* There is no lock to clear */ } -static const struct rpc_call_ops nfs_commit_direct_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_write_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_direct_commit_result, - .rpc_release = nfs_direct_commit_release, +static const struct nfs_commit_completion_ops nfs_direct_commit_completion_ops = { + .completion = nfs_direct_commit_complete, + .error_cleanup = nfs_direct_error_cleanup, }; static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq) { - struct nfs_write_data *data = dreq->commit_data; - struct rpc_task *task; - struct rpc_message msg = { - .rpc_argp = &data->args, - .rpc_resp = &data->res, - .rpc_cred = dreq->ctx->cred, - }; - struct rpc_task_setup task_setup_data = { - .task = &data->task, - .rpc_client = NFS_CLIENT(dreq->inode), - .rpc_message = &msg, - .callback_ops = &nfs_commit_direct_ops, - .callback_data = data, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, - }; - - data->inode = dreq->inode; - data->cred = msg.rpc_cred; - - data->args.fh = NFS_FH(data->inode); - data->args.offset = 0; - data->args.count = 0; - data->args.context = dreq->ctx; - data->args.lock_context = dreq->l_ctx; - data->res.count = 0; - data->res.fattr = &data->fattr; - data->res.verf = &data->verf; - nfs_fattr_init(&data->fattr); - - NFS_PROTO(data->inode)->commit_setup(data, &msg); - - /* Note: task.tk_ops->rpc_release will free dreq->commit_data */ - dreq->commit_data = NULL; - - dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid); - - task = rpc_run_task(&task_setup_data); - if (!IS_ERR(task)) - rpc_put_task(task); + int res; + struct nfs_commit_info cinfo; + LIST_HEAD(mds_list); + + nfs_init_cinfo_from_dreq(&cinfo, dreq); + nfs_scan_commit(dreq->inode, &mds_list, &cinfo); + res = nfs_generic_commit_list(dreq->inode, &mds_list, 0, &cinfo); + if (res < 0) /* res == -ENOMEM */ + nfs_direct_write_reschedule(dreq); } -static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode) +static void nfs_direct_write_schedule_work(struct work_struct *work) { + struct nfs_direct_req *dreq = container_of(work, struct nfs_direct_req, work); int flags = dreq->flags; dreq->flags = 0; @@ -614,92 +691,111 @@ static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode nfs_direct_write_reschedule(dreq); break; default: - if (dreq->commit_data != NULL) - nfs_commit_free(dreq->commit_data); - nfs_direct_free_writedata(dreq); - nfs_zap_mapping(inode, inode->i_mapping); - nfs_direct_complete(dreq); + nfs_direct_complete(dreq, true); } } -static void nfs_alloc_commit_data(struct nfs_direct_req *dreq) +static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode) { - dreq->commit_data = nfs_commitdata_alloc(); - if (dreq->commit_data != NULL) - dreq->commit_data->req = (struct nfs_page *) dreq; + schedule_work(&dreq->work); /* Calls nfs_direct_write_schedule_work */ } + #else -static inline void nfs_alloc_commit_data(struct nfs_direct_req *dreq) +static void nfs_direct_write_schedule_work(struct work_struct *work) { - dreq->commit_data = NULL; } static void nfs_direct_write_complete(struct nfs_direct_req *dreq, struct inode *inode) { - nfs_direct_free_writedata(dreq); - nfs_zap_mapping(inode, inode->i_mapping); - nfs_direct_complete(dreq); + nfs_direct_complete(dreq, true); } #endif -static void nfs_direct_write_result(struct rpc_task *task, void *calldata) +static void nfs_direct_write_completion(struct nfs_pgio_header *hdr) { - struct nfs_write_data *data = calldata; + struct nfs_direct_req *dreq = hdr->dreq; + struct nfs_commit_info cinfo; + int bit = -1; + struct nfs_page *req = nfs_list_entry(hdr->pages.next); - if (nfs_writeback_done(task, data) != 0) - return; -} + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) + goto out_put; -/* - * NB: Return the value of the first error return code. Subsequent - * errors after the first one are ignored. - */ -static void nfs_direct_write_release(void *calldata) -{ - struct nfs_write_data *data = calldata; - struct nfs_direct_req *dreq = (struct nfs_direct_req *) data->req; - int status = data->task.tk_status; + nfs_init_cinfo_from_dreq(&cinfo, dreq); spin_lock(&dreq->lock); - if (unlikely(status < 0)) { - /* An error has occurred, so we should not commit */ + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) { dreq->flags = 0; - dreq->error = status; + dreq->error = hdr->error; } - if (unlikely(dreq->error != 0)) - goto out_unlock; - - dreq->count += data->res.count; - - if (data->res.verf->committed != NFS_FILE_SYNC) { - switch (dreq->flags) { - case 0: - memcpy(&dreq->verf, &data->verf, sizeof(dreq->verf)); + if (dreq->error != 0) + bit = NFS_IOHDR_ERROR; + else { + dreq->count += hdr->good_bytes; + if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) { + dreq->flags = NFS_ODIRECT_RESCHED_WRITES; + bit = NFS_IOHDR_NEED_RESCHED; + } else if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) { + if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) + bit = NFS_IOHDR_NEED_RESCHED; + else if (dreq->flags == 0) { + nfs_direct_set_hdr_verf(dreq, hdr); + bit = NFS_IOHDR_NEED_COMMIT; dreq->flags = NFS_ODIRECT_DO_COMMIT; - break; - case NFS_ODIRECT_DO_COMMIT: - if (memcmp(&dreq->verf, &data->verf, sizeof(dreq->verf))) { - dprintk("NFS: %5u write verify failed\n", data->task.tk_pid); - dreq->flags = NFS_ODIRECT_RESCHED_WRITES; - } + } else if (dreq->flags == NFS_ODIRECT_DO_COMMIT) { + if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr)) { + dreq->flags = + NFS_ODIRECT_RESCHED_WRITES; + bit = NFS_IOHDR_NEED_RESCHED; + } else + bit = NFS_IOHDR_NEED_COMMIT; + } } } -out_unlock: spin_unlock(&dreq->lock); + while (!list_empty(&hdr->pages)) { + + req = nfs_list_entry(hdr->pages.next); + nfs_list_remove_request(req); + switch (bit) { + case NFS_IOHDR_NEED_RESCHED: + case NFS_IOHDR_NEED_COMMIT: + kref_get(&req->wb_kref); + nfs_mark_request_commit(req, hdr->lseg, &cinfo); + } + nfs_unlock_and_release_request(req); + } + +out_put: if (put_dreq(dreq)) - nfs_direct_write_complete(dreq, data->inode); + nfs_direct_write_complete(dreq, hdr->inode); + hdr->release(hdr); } -static const struct rpc_call_ops nfs_write_direct_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_write_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_direct_write_result, - .rpc_release = nfs_direct_write_release, +static void nfs_write_sync_pgio_error(struct list_head *head) +{ + struct nfs_page *req; + + while (!list_empty(head)) { + req = nfs_list_entry(head->next); + nfs_list_remove_request(req); + nfs_unlock_and_release_request(req); + } +} + +static const struct nfs_pgio_completion_ops nfs_direct_write_completion_ops = { + .error_cleanup = nfs_write_sync_pgio_error, + .init_hdr = nfs_direct_pgio_init, + .completion = nfs_direct_write_completion, }; + +/* + * NB: Return the value of the first error return code. Subsequent + * errors after the first one are ignored. + */ /* * For each wsize'd chunk of the user's buffer, dispatch an NFS WRITE * operation. If nfs_writedata_alloc() or get_user_pages() fails, @@ -707,244 +803,87 @@ static const struct rpc_call_ops nfs_write_direct_ops = { * handled automatically by nfs_direct_write_result(). Otherwise, if * no requests have been sent, just return an error. */ -static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq, - const struct iovec *iov, - loff_t pos, int sync) -{ - struct nfs_open_context *ctx = dreq->ctx; - struct inode *inode = ctx->path.dentry->d_inode; - unsigned long user_addr = (unsigned long)iov->iov_base; - size_t count = iov->iov_len; - struct rpc_task *task; - struct rpc_message msg = { - .rpc_cred = ctx->cred, - }; - struct rpc_task_setup task_setup_data = { - .rpc_client = NFS_CLIENT(inode), - .rpc_message = &msg, - .callback_ops = &nfs_write_direct_ops, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, - }; - size_t wsize = NFS_SERVER(inode)->wsize; - unsigned int pgbase; - int result; - ssize_t started = 0; - - do { - struct nfs_write_data *data; - size_t bytes; - - pgbase = user_addr & ~PAGE_MASK; - bytes = min(wsize,count); - - result = -ENOMEM; - data = nfs_writedata_alloc(nfs_page_array_len(pgbase, bytes)); - if (unlikely(!data)) - break; - - down_read(¤t->mm->mmap_sem); - result = get_user_pages(current, current->mm, user_addr, - data->npages, 0, 0, data->pagevec, NULL); - up_read(¤t->mm->mmap_sem); - if (result < 0) { - nfs_writedata_free(data); - break; - } - if ((unsigned)result < data->npages) { - bytes = result * PAGE_SIZE; - if (bytes <= pgbase) { - nfs_direct_release_pages(data->pagevec, result); - nfs_writedata_free(data); - break; - } - bytes -= pgbase; - data->npages = result; - } - - get_dreq(dreq); - - list_move_tail(&data->pages, &dreq->rewrite_list); - - data->req = (struct nfs_page *) dreq; - data->inode = inode; - data->cred = msg.rpc_cred; - data->args.fh = NFS_FH(inode); - data->args.context = ctx; - data->args.lock_context = dreq->l_ctx; - data->args.offset = pos; - data->args.pgbase = pgbase; - data->args.pages = data->pagevec; - data->args.count = bytes; - data->args.stable = sync; - data->res.fattr = &data->fattr; - data->res.count = bytes; - data->res.verf = &data->verf; - nfs_fattr_init(&data->fattr); - - task_setup_data.task = &data->task; - task_setup_data.callback_data = data; - msg.rpc_argp = &data->args; - msg.rpc_resp = &data->res; - NFS_PROTO(inode)->write_setup(data, &msg); - - task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) - break; - rpc_put_task(task); - - dprintk("NFS: %5u initiated direct write call " - "(req %s/%Ld, %zu bytes @ offset %Lu)\n", - data->task.tk_pid, - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - bytes, - (unsigned long long)data->args.offset); - - started += bytes; - user_addr += bytes; - pos += bytes; - - /* FIXME: Remove this useless math from the final patch */ - pgbase += bytes; - pgbase &= ~PAGE_MASK; - BUG_ON(pgbase != (user_addr & ~PAGE_MASK)); - - count -= bytes; - } while (count != 0); - - if (started) - return started; - return result < 0 ? (ssize_t) result : -EFAULT; -} - static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq, - const struct iovec *iov, - unsigned long nr_segs, - loff_t pos, int sync) + struct iov_iter *iter, + loff_t pos) { + struct nfs_pageio_descriptor desc; + struct inode *inode = dreq->inode; ssize_t result = 0; size_t requested_bytes = 0; - unsigned long seg; + size_t wsize = max_t(size_t, NFS_SERVER(inode)->wsize, PAGE_SIZE); + nfs_pageio_init_write(&desc, inode, FLUSH_COND_STABLE, false, + &nfs_direct_write_completion_ops); + desc.pg_dreq = dreq; get_dreq(dreq); + atomic_inc(&inode->i_dio_count); - for (seg = 0; seg < nr_segs; seg++) { - const struct iovec *vec = &iov[seg]; - result = nfs_direct_write_schedule_segment(dreq, vec, - pos, sync); + NFS_I(inode)->write_io += iov_iter_count(iter); + while (iov_iter_count(iter)) { + struct page **pagevec; + size_t bytes; + size_t pgbase; + unsigned npages, i; + + result = iov_iter_get_pages_alloc(iter, &pagevec, + wsize, &pgbase); if (result < 0) break; - requested_bytes += result; - if ((size_t)result < vec->iov_len) + + bytes = result; + iov_iter_advance(iter, bytes); + npages = (result + pgbase + PAGE_SIZE - 1) / PAGE_SIZE; + for (i = 0; i < npages; i++) { + struct nfs_page *req; + unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase); + + req = nfs_create_request(dreq->ctx, pagevec[i], NULL, + pgbase, req_len); + if (IS_ERR(req)) { + result = PTR_ERR(req); + break; + } + nfs_lock_request(req); + req->wb_index = pos >> PAGE_SHIFT; + req->wb_offset = pos & ~PAGE_MASK; + if (!nfs_pageio_add_request(&desc, req)) { + result = desc.pg_error; + nfs_unlock_and_release_request(req); + break; + } + pgbase = 0; + bytes -= req_len; + requested_bytes += req_len; + pos += req_len; + dreq->bytes_left -= req_len; + } + nfs_direct_release_pages(pagevec, npages); + kvfree(pagevec); + if (result < 0) break; - pos += vec->iov_len; + } + nfs_pageio_complete(&desc); + + /* + * If no bytes were started, return the error, and let the + * generic layer handle the completion. + */ + if (requested_bytes == 0) { + inode_dio_done(inode); + nfs_direct_req_release(dreq); + return result < 0 ? result : -EIO; } if (put_dreq(dreq)) nfs_direct_write_complete(dreq, dreq->inode); - - if (requested_bytes != 0) - return 0; - - if (result < 0) - return result; - return -EIO; -} - -static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos, - size_t count) -{ - ssize_t result = -ENOMEM; - struct inode *inode = iocb->ki_filp->f_mapping->host; - struct nfs_direct_req *dreq; - size_t wsize = NFS_SERVER(inode)->wsize; - int sync = NFS_UNSTABLE; - - dreq = nfs_direct_req_alloc(); - if (!dreq) - goto out; - nfs_alloc_commit_data(dreq); - - if (dreq->commit_data == NULL || count < wsize) - sync = NFS_FILE_SYNC; - - dreq->inode = inode; - dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp)); - dreq->l_ctx = nfs_get_lock_context(dreq->ctx); - if (dreq->l_ctx == NULL) - goto out_release; - if (!is_sync_kiocb(iocb)) - dreq->iocb = iocb; - - result = nfs_direct_write_schedule_iovec(dreq, iov, nr_segs, pos, sync); - if (!result) - result = nfs_direct_wait(dreq); -out_release: - nfs_direct_req_release(dreq); -out: - return result; -} - -/** - * nfs_file_direct_read - file direct read operation for NFS files - * @iocb: target I/O control block - * @iov: vector of user buffers into which to read data - * @nr_segs: size of iov vector - * @pos: byte offset in file where reading starts - * - * We use this function for direct reads instead of calling - * generic_file_aio_read() in order to avoid gfar's check to see if - * the request starts before the end of the file. For that check - * to work, we must generate a GETATTR before each direct read, and - * even then there is a window between the GETATTR and the subsequent - * READ where the file size could change. Our preference is simply - * to do all reads the application wants, and the server will take - * care of managing the end of file boundary. - * - * This function also eliminates unnecessarily updating the file's - * atime locally, as the NFS server sets the file's atime, and this - * client must read the updated atime from the server back into its - * cache. - */ -ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - ssize_t retval = -EINVAL; - struct file *file = iocb->ki_filp; - struct address_space *mapping = file->f_mapping; - size_t count; - - count = iov_length(iov, nr_segs); - nfs_add_stats(mapping->host, NFSIOS_DIRECTREADBYTES, count); - - dfprintk(FILE, "NFS: direct read(%s/%s, %zd@%Ld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, - count, (long long) pos); - - retval = 0; - if (!count) - goto out; - - retval = nfs_sync_mapping(mapping); - if (retval) - goto out; - - retval = nfs_direct_read(iocb, iov, nr_segs, pos); - if (retval > 0) - iocb->ki_pos = pos + retval; - -out: - return retval; + return 0; } /** * nfs_file_direct_write - file direct write operation for NFS files * @iocb: target I/O control block - * @iov: vector of user buffers from which to write data - * @nr_segs: size of iov vector + * @iter: vector of user buffers from which to write data * @pos: byte offset in file where writing starts * * We use this function for direct writes instead of calling @@ -962,44 +901,97 @@ out: * Note that O_APPEND is not supported for NFS direct writes, as there * is no atomic O_APPEND write facility in the NFS protocol. */ -ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter, + loff_t pos, bool uio) { - ssize_t retval = -EINVAL; + ssize_t result = -EINVAL; struct file *file = iocb->ki_filp; struct address_space *mapping = file->f_mapping; - size_t count; + struct inode *inode = mapping->host; + struct nfs_direct_req *dreq; + struct nfs_lock_context *l_ctx; + loff_t end; + size_t count = iov_iter_count(iter); + end = (pos + count - 1) >> PAGE_CACHE_SHIFT; - count = iov_length(iov, nr_segs); nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count); - dfprintk(FILE, "NFS: direct write(%s/%s, %zd@%Ld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, - count, (long long) pos); + dfprintk(FILE, "NFS: direct write(%pD2, %zd@%Ld)\n", + file, count, (long long) pos); - retval = generic_write_checks(file, &pos, &count, 0); - if (retval) + result = generic_write_checks(file, &pos, &count, 0); + if (result) goto out; - retval = -EINVAL; + result = -EINVAL; if ((ssize_t) count < 0) goto out; - retval = 0; + result = 0; if (!count) goto out; - retval = nfs_sync_mapping(mapping); - if (retval) - goto out; + mutex_lock(&inode->i_mutex); + + result = nfs_sync_mapping(mapping); + if (result) + goto out_unlock; + + if (mapping->nrpages) { + result = invalidate_inode_pages2_range(mapping, + pos >> PAGE_CACHE_SHIFT, end); + if (result) + goto out_unlock; + } - retval = nfs_direct_write(iocb, iov, nr_segs, pos, count); + task_io_account_write(count); - if (retval > 0) - iocb->ki_pos = pos + retval; + result = -ENOMEM; + dreq = nfs_direct_req_alloc(); + if (!dreq) + goto out_unlock; + dreq->inode = inode; + dreq->bytes_left = count; + dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp)); + l_ctx = nfs_get_lock_context(dreq->ctx); + if (IS_ERR(l_ctx)) { + result = PTR_ERR(l_ctx); + goto out_release; + } + dreq->l_ctx = l_ctx; + if (!is_sync_kiocb(iocb)) + dreq->iocb = iocb; + + result = nfs_direct_write_schedule_iovec(dreq, iter, pos); + + if (mapping->nrpages) { + invalidate_inode_pages2_range(mapping, + pos >> PAGE_CACHE_SHIFT, end); + } + + mutex_unlock(&inode->i_mutex); + + if (!result) { + result = nfs_direct_wait(dreq); + if (result > 0) { + struct inode *inode = mapping->host; + + iocb->ki_pos = pos + result; + spin_lock(&inode->i_lock); + if (i_size_read(inode) < iocb->ki_pos) + i_size_write(inode, iocb->ki_pos); + spin_unlock(&inode->i_lock); + } + } + nfs_direct_req_release(dreq); + return result; + +out_release: + nfs_direct_req_release(dreq); +out_unlock: + mutex_unlock(&inode->i_mutex); out: - return retval; + return result; } /** diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c index a6e711ad130..d25f10fb492 100644 --- a/fs/nfs/dns_resolve.c +++ b/fs/nfs/dns_resolve.c @@ -8,10 +8,13 @@ #ifdef CONFIG_NFS_USE_KERNEL_DNS +#include <linux/module.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/addr.h> #include <linux/dns_resolver.h> +#include "dns_resolve.h" -ssize_t nfs_dns_resolve_name(char *name, size_t namelen, +ssize_t nfs_dns_resolve_name(struct net *net, char *name, size_t namelen, struct sockaddr *sa, size_t salen) { ssize_t ret; @@ -20,7 +23,7 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen, ip_len = dns_query(NULL, name, namelen, NULL, &ip_addr, NULL); if (ip_len > 0) - ret = rpc_pton(ip_addr, ip_len, sa, salen); + ret = rpc_pton(net, ip_addr, ip_len, sa, salen); else ret = -ESRCH; kfree(ip_addr); @@ -29,6 +32,7 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen, #else +#include <linux/module.h> #include <linux/hash.h> #include <linux/string.h> #include <linux/kmod.h> @@ -38,17 +42,20 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen, #include <linux/seq_file.h> #include <linux/inet.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/addr.h> #include <linux/sunrpc/cache.h> #include <linux/sunrpc/svcauth.h> +#include <linux/sunrpc/rpc_pipe_fs.h> +#include <linux/nfs_fs.h> +#include "nfs4_fs.h" #include "dns_resolve.h" #include "cache_lib.h" +#include "netns.h" #define NFS_DNS_HASHBITS 4 #define NFS_DNS_HASHTBL_SIZE (1 << NFS_DNS_HASHBITS) -static struct cache_head *nfs_dns_table[NFS_DNS_HASHTBL_SIZE]; - struct nfs_dns_ent { struct cache_head h; @@ -138,7 +145,7 @@ static int nfs_dns_upcall(struct cache_detail *cd, ret = nfs_cache_upcall(cd, key->hostname); if (ret) - ret = sunrpc_cache_pipe_upcall(cd, ch, nfs_dns_request); + ret = sunrpc_cache_pipe_upcall(cd, ch); return ret; } @@ -213,7 +220,7 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen) { char buf1[NFS_DNS_HOSTNAME_MAXLEN+1]; struct nfs_dns_ent key, *item; - unsigned long ttl; + unsigned int ttl; ssize_t len; int ret = -EINVAL; @@ -224,7 +231,7 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen) len = qword_get(&buf, buf1, sizeof(buf1)); if (len <= 0) goto out; - key.addrlen = rpc_pton(buf1, len, + key.addrlen = rpc_pton(cd->net, buf1, len, (struct sockaddr *)&key.addr, sizeof(key.addr)); @@ -236,7 +243,8 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen) key.namelen = len; memset(&key.h, 0, sizeof(key.h)); - ttl = get_expiry(&buf); + if (get_uint(&buf, &ttl) < 0) + goto out; if (ttl == 0) goto out; key.h.expiry_time = ttl + seconds_since_boot(); @@ -259,21 +267,6 @@ out: return ret; } -static struct cache_detail nfs_dns_resolve = { - .owner = THIS_MODULE, - .hash_size = NFS_DNS_HASHTBL_SIZE, - .hash_table = nfs_dns_table, - .name = "dns_resolve", - .cache_put = nfs_dns_ent_put, - .cache_upcall = nfs_dns_upcall, - .cache_parse = nfs_dns_parse, - .cache_show = nfs_dns_show, - .match = nfs_dns_match, - .init = nfs_dns_ent_init, - .update = nfs_dns_ent_update, - .alloc = nfs_dns_ent_alloc, -}; - static int do_cache_lookup(struct cache_detail *cd, struct nfs_dns_ent *key, struct nfs_dns_ent **item, @@ -336,8 +329,8 @@ out: return ret; } -ssize_t nfs_dns_resolve_name(char *name, size_t namelen, - struct sockaddr *sa, size_t salen) +ssize_t nfs_dns_resolve_name(struct net *net, char *name, + size_t namelen, struct sockaddr *sa, size_t salen) { struct nfs_dns_ent key = { .hostname = name, @@ -345,28 +338,133 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen, }; struct nfs_dns_ent *item = NULL; ssize_t ret; + struct nfs_net *nn = net_generic(net, nfs_net_id); - ret = do_cache_lookup_wait(&nfs_dns_resolve, &key, &item); + ret = do_cache_lookup_wait(nn->nfs_dns_resolve, &key, &item); if (ret == 0) { if (salen >= item->addrlen) { memcpy(sa, &item->addr, item->addrlen); ret = item->addrlen; } else ret = -EOVERFLOW; - cache_put(&item->h, &nfs_dns_resolve); + cache_put(&item->h, nn->nfs_dns_resolve); } else if (ret == -ENOENT) ret = -ESRCH; return ret; } +static struct cache_detail nfs_dns_resolve_template = { + .owner = THIS_MODULE, + .hash_size = NFS_DNS_HASHTBL_SIZE, + .name = "dns_resolve", + .cache_put = nfs_dns_ent_put, + .cache_upcall = nfs_dns_upcall, + .cache_request = nfs_dns_request, + .cache_parse = nfs_dns_parse, + .cache_show = nfs_dns_show, + .match = nfs_dns_match, + .init = nfs_dns_ent_init, + .update = nfs_dns_ent_update, + .alloc = nfs_dns_ent_alloc, +}; + + +int nfs_dns_resolver_cache_init(struct net *net) +{ + int err; + struct nfs_net *nn = net_generic(net, nfs_net_id); + + nn->nfs_dns_resolve = cache_create_net(&nfs_dns_resolve_template, net); + if (IS_ERR(nn->nfs_dns_resolve)) + return PTR_ERR(nn->nfs_dns_resolve); + + err = nfs_cache_register_net(net, nn->nfs_dns_resolve); + if (err) + goto err_reg; + return 0; + +err_reg: + cache_destroy_net(nn->nfs_dns_resolve, net); + return err; +} + +void nfs_dns_resolver_cache_destroy(struct net *net) +{ + struct nfs_net *nn = net_generic(net, nfs_net_id); + + nfs_cache_unregister_net(net, nn->nfs_dns_resolve); + cache_destroy_net(nn->nfs_dns_resolve, net); +} + +static int nfs4_dns_net_init(struct net *net) +{ + return nfs_dns_resolver_cache_init(net); +} + +static void nfs4_dns_net_exit(struct net *net) +{ + nfs_dns_resolver_cache_destroy(net); +} + +static struct pernet_operations nfs4_dns_resolver_ops = { + .init = nfs4_dns_net_init, + .exit = nfs4_dns_net_exit, +}; + +static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, + void *ptr) +{ + struct super_block *sb = ptr; + struct net *net = sb->s_fs_info; + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct cache_detail *cd = nn->nfs_dns_resolve; + int ret = 0; + + if (cd == NULL) + return 0; + + if (!try_module_get(THIS_MODULE)) + return 0; + + switch (event) { + case RPC_PIPEFS_MOUNT: + ret = nfs_cache_register_sb(sb, cd); + break; + case RPC_PIPEFS_UMOUNT: + nfs_cache_unregister_sb(sb, cd); + break; + default: + ret = -ENOTSUPP; + break; + } + module_put(THIS_MODULE); + return ret; +} + +static struct notifier_block nfs_dns_resolver_block = { + .notifier_call = rpc_pipefs_event, +}; + int nfs_dns_resolver_init(void) { - return nfs_cache_register(&nfs_dns_resolve); + int err; + + err = register_pernet_subsys(&nfs4_dns_resolver_ops); + if (err < 0) + goto out; + err = rpc_pipefs_notifier_register(&nfs_dns_resolver_block); + if (err < 0) + goto out1; + return 0; +out1: + unregister_pernet_subsys(&nfs4_dns_resolver_ops); +out: + return err; } void nfs_dns_resolver_destroy(void) { - nfs_cache_unregister(&nfs_dns_resolve); + rpc_pipefs_notifier_unregister(&nfs_dns_resolver_block); + unregister_pernet_subsys(&nfs4_dns_resolver_ops); } - #endif diff --git a/fs/nfs/dns_resolve.h b/fs/nfs/dns_resolve.h index 199bb5543a9..2e4f596d292 100644 --- a/fs/nfs/dns_resolve.h +++ b/fs/nfs/dns_resolve.h @@ -15,12 +15,22 @@ static inline int nfs_dns_resolver_init(void) static inline void nfs_dns_resolver_destroy(void) {} + +static inline int nfs_dns_resolver_cache_init(struct net *net) +{ + return 0; +} + +static inline void nfs_dns_resolver_cache_destroy(struct net *net) +{} #else extern int nfs_dns_resolver_init(void); extern void nfs_dns_resolver_destroy(void); +extern int nfs_dns_resolver_cache_init(struct net *net); +extern void nfs_dns_resolver_cache_destroy(struct net *net); #endif -extern ssize_t nfs_dns_resolve_name(char *name, size_t namelen, - struct sockaddr *sa, size_t salen); +extern ssize_t nfs_dns_resolve_name(struct net *net, char *name, + size_t namelen, struct sockaddr *sa, size_t salen); #endif diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 60677f9f131..4042ff58fe3 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -16,6 +16,7 @@ * nfs regular file handling functions */ +#include <linux/module.h> #include <linux/time.h> #include <linux/kernel.h> #include <linux/errno.h> @@ -30,88 +31,31 @@ #include <linux/swap.h> #include <asm/uaccess.h> -#include <asm/system.h> #include "delegation.h" #include "internal.h" #include "iostat.h" #include "fscache.h" -#include "pnfs.h" -#define NFSDBG_FACILITY NFSDBG_FILE +#include "nfstrace.h" -static int nfs_file_open(struct inode *, struct file *); -static int nfs_file_release(struct inode *, struct file *); -static loff_t nfs_file_llseek(struct file *file, loff_t offset, int origin); -static int nfs_file_mmap(struct file *, struct vm_area_struct *); -static ssize_t nfs_file_splice_read(struct file *filp, loff_t *ppos, - struct pipe_inode_info *pipe, - size_t count, unsigned int flags); -static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov, - unsigned long nr_segs, loff_t pos); -static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe, - struct file *filp, loff_t *ppos, - size_t count, unsigned int flags); -static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov, - unsigned long nr_segs, loff_t pos); -static int nfs_file_flush(struct file *, fl_owner_t id); -static int nfs_file_fsync(struct file *, int datasync); -static int nfs_check_flags(int flags); -static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl); -static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl); -static int nfs_setlease(struct file *file, long arg, struct file_lock **fl); +#define NFSDBG_FACILITY NFSDBG_FILE static const struct vm_operations_struct nfs_file_vm_ops; -const struct file_operations nfs_file_operations = { - .llseek = nfs_file_llseek, - .read = do_sync_read, - .write = do_sync_write, - .aio_read = nfs_file_read, - .aio_write = nfs_file_write, - .mmap = nfs_file_mmap, - .open = nfs_file_open, - .flush = nfs_file_flush, - .release = nfs_file_release, - .fsync = nfs_file_fsync, - .lock = nfs_lock, - .flock = nfs_flock, - .splice_read = nfs_file_splice_read, - .splice_write = nfs_file_splice_write, - .check_flags = nfs_check_flags, - .setlease = nfs_setlease, -}; - -const struct inode_operations nfs_file_inode_operations = { - .permission = nfs_permission, - .getattr = nfs_getattr, - .setattr = nfs_setattr, -}; - -#ifdef CONFIG_NFS_V3 -const struct inode_operations nfs3_file_inode_operations = { - .permission = nfs_permission, - .getattr = nfs_getattr, - .setattr = nfs_setattr, - .listxattr = nfs3_listxattr, - .getxattr = nfs3_getxattr, - .setxattr = nfs3_setxattr, - .removexattr = nfs3_removexattr, -}; -#endif /* CONFIG_NFS_v3 */ - /* Hack for future NFS swap support */ #ifndef IS_SWAPFILE # define IS_SWAPFILE(inode) (0) #endif -static int nfs_check_flags(int flags) +int nfs_check_flags(int flags) { if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT)) return -EINVAL; return 0; } +EXPORT_SYMBOL_GPL(nfs_check_flags); /* * Open file @@ -121,9 +65,7 @@ nfs_file_open(struct inode *inode, struct file *filp) { int res; - dprintk("NFS: open file(%s/%s)\n", - filp->f_path.dentry->d_parent->d_name.name, - filp->f_path.dentry->d_name.name); + dprintk("NFS: open file(%pD2)\n", filp); nfs_inc_stats(inode, NFSIOS_VFSOPEN); res = nfs_check_flags(filp->f_flags); @@ -134,18 +76,15 @@ nfs_file_open(struct inode *inode, struct file *filp) return res; } -static int +int nfs_file_release(struct inode *inode, struct file *filp) { - struct dentry *dentry = filp->f_path.dentry; - - dprintk("NFS: release(%s/%s)\n", - dentry->d_parent->d_name.name, - dentry->d_name.name); + dprintk("NFS: release(%pD2)\n", filp); nfs_inc_stats(inode, NFSIOS_VFSRELEASE); return nfs_release(inode, filp); } +EXPORT_SYMBOL_GPL(nfs_file_release); /** * nfs_revalidate_size - Revalidate the file size @@ -178,89 +117,86 @@ force_reval: return __nfs_revalidate_inode(server, inode); } -static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) +loff_t nfs_file_llseek(struct file *filp, loff_t offset, int whence) { - loff_t loff; + dprintk("NFS: llseek file(%pD2, %lld, %d)\n", + filp, offset, whence); - dprintk("NFS: llseek file(%s/%s, %lld, %d)\n", - filp->f_path.dentry->d_parent->d_name.name, - filp->f_path.dentry->d_name.name, - offset, origin); - - /* origin == SEEK_END => we must revalidate the cached file length */ - if (origin == SEEK_END) { + /* + * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate + * the cached file length + */ + if (whence != SEEK_SET && whence != SEEK_CUR) { struct inode *inode = filp->f_mapping->host; int retval = nfs_revalidate_file_size(inode, filp); if (retval < 0) return (loff_t)retval; + } - spin_lock(&inode->i_lock); - loff = generic_file_llseek_unlocked(filp, offset, origin); - spin_unlock(&inode->i_lock); - } else - loff = generic_file_llseek_unlocked(filp, offset, origin); - return loff; + return generic_file_llseek(filp, offset, whence); } +EXPORT_SYMBOL_GPL(nfs_file_llseek); /* * Flush all dirty pages, and check for write errors. */ -static int +int nfs_file_flush(struct file *file, fl_owner_t id) { - struct dentry *dentry = file->f_path.dentry; - struct inode *inode = dentry->d_inode; + struct inode *inode = file_inode(file); - dprintk("NFS: flush(%s/%s)\n", - dentry->d_parent->d_name.name, - dentry->d_name.name); + dprintk("NFS: flush(%pD2)\n", file); nfs_inc_stats(inode, NFSIOS_VFSFLUSH); if ((file->f_mode & FMODE_WRITE) == 0) return 0; + /* + * If we're holding a write delegation, then just start the i/o + * but don't wait for completion (or send a commit). + */ + if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) + return filemap_fdatawrite(file->f_mapping); + /* Flush writes to the server and return any errors */ return vfs_fsync(file, 0); } +EXPORT_SYMBOL_GPL(nfs_file_flush); -static ssize_t -nfs_file_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t +nfs_file_read(struct kiocb *iocb, struct iov_iter *to) { - struct dentry * dentry = iocb->ki_filp->f_path.dentry; - struct inode * inode = dentry->d_inode; + struct inode *inode = file_inode(iocb->ki_filp); ssize_t result; - size_t count = iov_length(iov, nr_segs); if (iocb->ki_filp->f_flags & O_DIRECT) - return nfs_file_direct_read(iocb, iov, nr_segs, pos); + return nfs_file_direct_read(iocb, to, iocb->ki_pos, true); - dprintk("NFS: read(%s/%s, %lu@%lu)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - (unsigned long) count, (unsigned long) pos); + dprintk("NFS: read(%pD2, %zu@%lu)\n", + iocb->ki_filp, + iov_iter_count(to), (unsigned long) iocb->ki_pos); result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping); if (!result) { - result = generic_file_aio_read(iocb, iov, nr_segs, pos); + result = generic_file_read_iter(iocb, to); if (result > 0) nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result); } return result; } +EXPORT_SYMBOL_GPL(nfs_file_read); -static ssize_t +ssize_t nfs_file_splice_read(struct file *filp, loff_t *ppos, struct pipe_inode_info *pipe, size_t count, unsigned int flags) { - struct dentry *dentry = filp->f_path.dentry; - struct inode *inode = dentry->d_inode; + struct inode *inode = file_inode(filp); ssize_t res; - dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - (unsigned long) count, (unsigned long long) *ppos); + dprintk("NFS: splice_read(%pD2, %lu@%Lu)\n", + filp, (unsigned long) count, (unsigned long long) *ppos); res = nfs_revalidate_mapping(inode, filp->f_mapping); if (!res) { @@ -270,16 +206,15 @@ nfs_file_splice_read(struct file *filp, loff_t *ppos, } return res; } +EXPORT_SYMBOL_GPL(nfs_file_splice_read); -static int +int nfs_file_mmap(struct file * file, struct vm_area_struct * vma) { - struct dentry *dentry = file->f_path.dentry; - struct inode *inode = dentry->d_inode; + struct inode *inode = file_inode(file); int status; - dprintk("NFS: mmap(%s/%s)\n", - dentry->d_parent->d_name.name, dentry->d_name.name); + dprintk("NFS: mmap(%pD2)\n", file); /* Note: generic_file_mmap() returns ENOSYS on nommu systems * so we call that before revalidating the mapping @@ -291,6 +226,7 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma) } return status; } +EXPORT_SYMBOL_GPL(nfs_file_mmap); /* * Flush any dirty pages for this process, and check for write errors. @@ -301,31 +237,66 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma) * disk, but it retrieves and clears ctx->error after synching, despite * the two being set at the same time in nfs_context_set_write_error(). * This is because the former is used to notify the _next_ call to - * nfs_file_write() that a write error occured, and hence cause it to + * nfs_file_write() that a write error occurred, and hence cause it to * fall back to doing a synchronous write. */ -static int -nfs_file_fsync(struct file *file, int datasync) +int +nfs_file_fsync_commit(struct file *file, loff_t start, loff_t end, int datasync) { - struct dentry *dentry = file->f_path.dentry; struct nfs_open_context *ctx = nfs_file_open_context(file); - struct inode *inode = dentry->d_inode; - int have_error, status; + struct inode *inode = file_inode(file); + int have_error, do_resend, status; int ret = 0; - - dprintk("NFS: fsync file(%s/%s) datasync %d\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - datasync); + dprintk("NFS: fsync file(%pD2) datasync %d\n", file, datasync); nfs_inc_stats(inode, NFSIOS_VFSFSYNC); + do_resend = test_and_clear_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); status = nfs_commit_inode(inode, FLUSH_SYNC); have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); - if (have_error) + if (have_error) { ret = xchg(&ctx->error, 0); - if (!ret && status < 0) + if (ret) + goto out; + } + if (status < 0) { ret = status; + goto out; + } + do_resend |= test_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags); + if (do_resend) + ret = -EAGAIN; +out: + return ret; +} +EXPORT_SYMBOL_GPL(nfs_file_fsync_commit); + +static int +nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) +{ + int ret; + struct inode *inode = file_inode(file); + + trace_nfs_fsync_enter(inode); + + do { + ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + if (ret != 0) + break; + mutex_lock(&inode->i_mutex); + ret = nfs_file_fsync_commit(file, start, end, datasync); + mutex_unlock(&inode->i_mutex); + /* + * If nfs_file_fsync_commit detected a server reboot, then + * resend all dirty pages that might have been covered by + * the NFS_CONTEXT_RESEND_WRITES flag + */ + start = 0; + end = LLONG_MAX; + } while (ret == -EAGAIN); + + trace_nfs_fsync_exit(inode, ret); return ret; } @@ -382,14 +353,8 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping, struct page *page; int once_thru = 0; - dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, - mapping->host->i_ino, len, (long long) pos); - - pnfs_update_layout(mapping->host, - nfs_file_open_context(file), - IOMODE_RW); + dfprintk(PAGECACHE, "NFS: write_begin(%pD2(%lu), %u@%lld)\n", + file, mapping->host->i_ino, len, (long long) pos); start: /* @@ -426,12 +391,11 @@ static int nfs_write_end(struct file *file, struct address_space *mapping, struct page *page, void *fsdata) { unsigned offset = pos & (PAGE_CACHE_SIZE - 1); + struct nfs_open_context *ctx = nfs_file_open_context(file); int status; - dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, - mapping->host->i_ino, len, (long long) pos); + dfprintk(PAGECACHE, "NFS: write_end(%pD2(%lu), %u@%lld)\n", + file, mapping->host->i_ino, len, (long long) pos); /* * Zero any uninitialised parts of the page, and then mark the page @@ -460,6 +424,14 @@ static int nfs_write_end(struct file *file, struct address_space *mapping, if (status < 0) return status; + NFS_I(mapping->host)->write_io += copied; + + if (nfs_ctx_key_to_expire(ctx)) { + status = nfs_wb_all(mapping->host); + if (status < 0) + return status; + } + return copied; } @@ -470,14 +442,16 @@ static int nfs_write_end(struct file *file, struct address_space *mapping, * - Called if either PG_private or PG_fscache is set on the page * - Caller holds page lock */ -static void nfs_invalidate_page(struct page *page, unsigned long offset) +static void nfs_invalidate_page(struct page *page, unsigned int offset, + unsigned int length) { - dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset); + dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %u, %u)\n", + page, offset, length); - if (offset != 0) + if (offset != 0 || length < PAGE_CACHE_SIZE) return; /* Cancel any unstarted writes on this page */ - nfs_wb_page_cancel(page->mapping->host, page); + nfs_wb_page_cancel(page_file_mapping(page)->host, page); nfs_fscache_invalidate_page(page, page->mapping->host); } @@ -494,8 +468,11 @@ static int nfs_release_page(struct page *page, gfp_t gfp) dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page); - /* Only do I/O if gfp is a superset of GFP_KERNEL */ - if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) { + /* Only do I/O if gfp is a superset of GFP_KERNEL, and we're not + * doing this memory reclaim for a fs-related allocation. + */ + if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL && + !(current->flags & PF_FSTRANS)) { int how = FLUSH_SYNC; /* Don't let kswapd deadlock waiting for OOM RPC calls */ @@ -509,6 +486,35 @@ static int nfs_release_page(struct page *page, gfp_t gfp) return nfs_fscache_release_page(page, gfp); } +static void nfs_check_dirty_writeback(struct page *page, + bool *dirty, bool *writeback) +{ + struct nfs_inode *nfsi; + struct address_space *mapping = page_file_mapping(page); + + if (!mapping || PageSwapCache(page)) + return; + + /* + * Check if an unstable page is currently being committed and + * if so, have the VM treat it as if the page is under writeback + * so it will not block due to pages that will shortly be freeable. + */ + nfsi = NFS_I(mapping->host); + if (test_bit(NFS_INO_COMMIT, &nfsi->flags)) { + *writeback = true; + return; + } + + /* + * If PagePrivate() is set, then the page is not freeable and as the + * inode is not being committed, it's not going to be cleaned in the + * near future so treat it as dirty + */ + if (PagePrivate(page)) + *dirty = true; +} + /* * Attempt to clear the private state associated with a page when an error * occurs that requires the cached contents of an inode to be written back or @@ -519,7 +525,7 @@ static int nfs_release_page(struct page *page, gfp_t gfp) */ static int nfs_launder_page(struct page *page) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; struct nfs_inode *nfsi = NFS_I(inode); dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n", @@ -529,6 +535,20 @@ static int nfs_launder_page(struct page *page) return nfs_wb_page(inode, page); } +#ifdef CONFIG_NFS_SWAP +static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file, + sector_t *span) +{ + *span = sis->pages; + return xs_swapper(NFS_CLIENT(file->f_mapping->host)->cl_xprt, 1); +} + +static void nfs_swap_deactivate(struct file *file) +{ + xs_swapper(NFS_CLIENT(file->f_mapping->host)->cl_xprt, 0); +} +#endif + const struct address_space_operations nfs_file_aops = { .readpage = nfs_readpage, .readpages = nfs_readpages, @@ -542,7 +562,12 @@ const struct address_space_operations nfs_file_aops = { .direct_IO = nfs_direct_IO, .migratepage = nfs_migrate_page, .launder_page = nfs_launder_page, + .is_dirty_writeback = nfs_check_dirty_writeback, .error_remove_page = generic_error_remove_page, +#ifdef CONFIG_NFS_SWAP + .swap_activate = nfs_swap_activate, + .swap_deactivate = nfs_swap_deactivate, +#endif }; /* @@ -554,24 +579,25 @@ static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { struct page *page = vmf->page; struct file *filp = vma->vm_file; - struct dentry *dentry = filp->f_path.dentry; + struct inode *inode = file_inode(filp); unsigned pagelen; int ret = VM_FAULT_NOPAGE; struct address_space *mapping; - dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - filp->f_mapping->host->i_ino, + dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%pD2(%lu), offset %lld)\n", + filp, filp->f_mapping->host->i_ino, (long long)page_offset(page)); /* make sure the cache has finished storing the page */ - nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page); + nfs_fscache_wait_on_page_write(NFS_I(inode), page); lock_page(page); - mapping = page->mapping; - if (mapping != dentry->d_inode->i_mapping) + mapping = page_file_mapping(page); + if (mapping != inode->i_mapping) goto out_unlock; + wait_on_page_writeback(page); + pagelen = nfs_page_length(page); if (pagelen == 0) goto out_unlock; @@ -590,7 +616,9 @@ out: static const struct vm_operations_struct nfs_file_vm_ops = { .fault = filemap_fault, + .map_pages = filemap_map_pages, .page_mkwrite = nfs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; static int nfs_need_sync_write(struct file *filp, struct inode *inode) @@ -600,26 +628,30 @@ static int nfs_need_sync_write(struct file *filp, struct inode *inode) if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC)) return 1; ctx = nfs_file_open_context(filp); - if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) + if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags) || + nfs_ctx_key_to_expire(ctx)) return 1; return 0; } -static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from) { - struct dentry * dentry = iocb->ki_filp->f_path.dentry; - struct inode * inode = dentry->d_inode; + struct file *file = iocb->ki_filp; + struct inode *inode = file_inode(file); unsigned long written = 0; ssize_t result; - size_t count = iov_length(iov, nr_segs); + size_t count = iov_iter_count(from); + loff_t pos = iocb->ki_pos; - if (iocb->ki_filp->f_flags & O_DIRECT) - return nfs_file_direct_write(iocb, iov, nr_segs, pos); + result = nfs_key_timeout_notify(file, inode); + if (result) + return result; + + if (file->f_flags & O_DIRECT) + return nfs_file_direct_write(iocb, from, pos, true); - dprintk("NFS: write(%s/%s, %lu@%Ld)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - (unsigned long) count, (long long) pos); + dprintk("NFS: write(%pD2, %zu@%Ld)\n", + file, count, (long long) pos); result = -EBUSY; if (IS_SWAPFILE(inode)) @@ -627,8 +659,8 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, /* * O_APPEND implies that we must revalidate the file length. */ - if (iocb->ki_filp->f_flags & O_APPEND) { - result = nfs_revalidate_file_size(inode, iocb->ki_filp); + if (file->f_flags & O_APPEND) { + result = nfs_revalidate_file_size(inode, file); if (result) goto out; } @@ -637,13 +669,13 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov, if (!count) goto out; - result = generic_file_aio_write(iocb, iov, nr_segs, pos); + result = generic_file_write_iter(iocb, from); if (result > 0) written = result; /* Return error values for O_DSYNC and IS_SYNC() */ - if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) { - int err = vfs_fsync(iocb->ki_filp, 0); + if (result >= 0 && nfs_need_sync_write(file, inode)) { + int err = vfs_fsync(file, 0); if (err < 0) result = err; } @@ -656,43 +688,14 @@ out_swapfile: printk(KERN_INFO "NFS: attempt to write to active swap file!\n"); goto out; } - -static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe, - struct file *filp, loff_t *ppos, - size_t count, unsigned int flags) -{ - struct dentry *dentry = filp->f_path.dentry; - struct inode *inode = dentry->d_inode; - unsigned long written = 0; - ssize_t ret; - - dprintk("NFS splice_write(%s/%s, %lu@%llu)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - (unsigned long) count, (unsigned long long) *ppos); - - /* - * The combination of splice and an O_APPEND destination is disallowed. - */ - - ret = generic_file_splice_write(pipe, filp, ppos, count, flags); - if (ret > 0) - written = ret; - - if (ret >= 0 && nfs_need_sync_write(filp, inode)) { - int err = vfs_fsync(filp, 0); - if (err < 0) - ret = err; - } - if (ret > 0) - nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); - return ret; -} +EXPORT_SYMBOL_GPL(nfs_file_write); static int do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status = 0; + unsigned int saved_type = fl->fl_type; /* Try local locking first */ posix_test_lock(filp, fl); @@ -700,8 +703,9 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) /* found a conflict */ goto out; } + fl->fl_type = saved_type; - if (nfs_have_delegation(inode, FMODE_READ)) + if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) goto out_noconflict; if (is_local) @@ -735,6 +739,7 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; + struct nfs_lock_context *l_ctx; int status; /* @@ -743,6 +748,14 @@ do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) */ nfs_sync_mapping(filp->f_mapping); + l_ctx = nfs_get_lock_context(nfs_file_open_context(filp)); + if (!IS_ERR(l_ctx)) { + status = nfs_iocounter_wait(&l_ctx->io_count); + nfs_put_lock_context(l_ctx); + if (status < 0) + return status; + } + /* NOTE: special case * If we're signalled while cleaning up locks on process exit, we * still need to complete the unlock. @@ -796,7 +809,7 @@ do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) * This makes locking act as a cache coherency point. */ nfs_sync_mapping(filp->f_mapping); - if (!nfs_have_delegation(inode, FMODE_READ)) { + if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) { if (is_time_granular(&NFS_SERVER(inode)->time_delta)) __nfs_revalidate_inode(NFS_SERVER(inode), inode); else @@ -809,16 +822,14 @@ out: /* * Lock a (portion of) a file */ -static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) +int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; int ret = -ENOLCK; int is_local = 0; - dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n", - filp->f_path.dentry->d_parent->d_name.name, - filp->f_path.dentry->d_name.name, - fl->fl_type, fl->fl_flags, + dprintk("NFS: lock(%pD2, t=%x, fl=%x, r=%lld:%lld)\n", + filp, fl->fl_type, fl->fl_flags, (long long)fl->fl_start, (long long)fl->fl_end); nfs_inc_stats(inode, NFSIOS_VFSLOCK); @@ -845,44 +856,68 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl) out_err: return ret; } +EXPORT_SYMBOL_GPL(nfs_lock); /* * Lock a (portion of) a file */ -static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) +int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) { struct inode *inode = filp->f_mapping->host; int is_local = 0; - dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n", - filp->f_path.dentry->d_parent->d_name.name, - filp->f_path.dentry->d_name.name, - fl->fl_type, fl->fl_flags); + dprintk("NFS: flock(%pD2, t=%x, fl=%x)\n", + filp, fl->fl_type, fl->fl_flags); if (!(fl->fl_flags & FL_FLOCK)) return -ENOLCK; + /* + * The NFSv4 protocol doesn't support LOCK_MAND, which is not part of + * any standard. In principle we might be able to support LOCK_MAND + * on NFSv2/3 since NLMv3/4 support DOS share modes, but for now the + * NFS code is not set up for it. + */ + if (fl->fl_type & LOCK_MAND) + return -EINVAL; + if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) is_local = 1; /* We're simulating flock() locks using posix locks on the server */ - fl->fl_owner = (fl_owner_t)filp; - fl->fl_start = 0; - fl->fl_end = OFFSET_MAX; - if (fl->fl_type == F_UNLCK) return do_unlk(filp, cmd, fl, is_local); return do_setlk(filp, cmd, fl, is_local); } +EXPORT_SYMBOL_GPL(nfs_flock); /* * There is no protocol support for leases, so we have no way to implement * them correctly in the face of opens by other clients. */ -static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) +int nfs_setlease(struct file *file, long arg, struct file_lock **fl) { - dprintk("NFS: setlease(%s/%s, arg=%ld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, arg); + dprintk("NFS: setlease(%pD2, arg=%ld)\n", file, arg); return -EINVAL; } +EXPORT_SYMBOL_GPL(nfs_setlease); + +const struct file_operations nfs_file_operations = { + .llseek = nfs_file_llseek, + .read = new_sync_read, + .write = new_sync_write, + .read_iter = nfs_file_read, + .write_iter = nfs_file_write, + .mmap = nfs_file_mmap, + .open = nfs_file_open, + .flush = nfs_file_flush, + .release = nfs_file_release, + .fsync = nfs_file_fsync, + .lock = nfs_lock, + .flock = nfs_flock, + .splice_read = nfs_file_splice_read, + .splice_write = iter_file_splice_write, + .check_flags = nfs_check_flags, + .setlease = nfs_setlease, +}; +EXPORT_SYMBOL_GPL(nfs_file_operations); diff --git a/fs/nfs/filelayout/Makefile b/fs/nfs/filelayout/Makefile new file mode 100644 index 00000000000..8516cdffb9e --- /dev/null +++ b/fs/nfs/filelayout/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the pNFS Files Layout Driver kernel module +# +obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o +nfs_layout_nfsv41_files-y := filelayout.o filelayoutdev.o diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c new file mode 100644 index 00000000000..d2eba1c13b7 --- /dev/null +++ b/fs/nfs/filelayout/filelayout.c @@ -0,0 +1,1406 @@ +/* + * Module for the pnfs nfs4 file layout driver. + * Defines all I/O and Policy interface operations, plus code + * to register itself with the pNFS client. + * + * Copyright (c) 2002 + * The Regents of the University of Michigan + * All Rights Reserved + * + * Dean Hildebrand <dhildebz@umich.edu> + * + * Permission is granted to use, copy, create derivative works, and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the University of Michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. If + * the above copyright notice or any other identification of the + * University of Michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * This software is provided as is, without representation or warranty + * of any kind either express or implied, including without limitation + * the implied warranties of merchantability, fitness for a particular + * purpose, or noninfringement. The Regents of the University of + * Michigan shall not be liable for any damages, including special, + * indirect, incidental, or consequential damages, with respect to any + * claim arising out of or in connection with the use of the software, + * even if it has been or is hereafter advised of the possibility of + * such damages. + */ + +#include <linux/nfs_fs.h> +#include <linux/nfs_page.h> +#include <linux/module.h> + +#include <linux/sunrpc/metrics.h> + +#include "../nfs4session.h" +#include "../internal.h" +#include "../delegation.h" +#include "filelayout.h" +#include "../nfs4trace.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>"); +MODULE_DESCRIPTION("The NFSv4 file layout driver"); + +#define FILELAYOUT_POLL_RETRY_MAX (15*HZ) + +static loff_t +filelayout_get_dense_offset(struct nfs4_filelayout_segment *flseg, + loff_t offset) +{ + u32 stripe_width = flseg->stripe_unit * flseg->dsaddr->stripe_count; + u64 stripe_no; + u32 rem; + + offset -= flseg->pattern_offset; + stripe_no = div_u64(offset, stripe_width); + div_u64_rem(offset, flseg->stripe_unit, &rem); + + return stripe_no * flseg->stripe_unit + rem; +} + +/* This function is used by the layout driver to calculate the + * offset of the file on the dserver based on whether the + * layout type is STRIPE_DENSE or STRIPE_SPARSE + */ +static loff_t +filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + + switch (flseg->stripe_type) { + case STRIPE_SPARSE: + return offset; + + case STRIPE_DENSE: + return filelayout_get_dense_offset(flseg, offset); + } + + BUG(); +} + +static void filelayout_reset_write(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + struct rpc_task *task = &data->task; + + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { + dprintk("%s Reset task %5u for i/o through MDS " + "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, + data->task.tk_pid, + hdr->inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(hdr->inode), + data->args.count, + (unsigned long long)data->args.offset); + + task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode, + &hdr->pages, + hdr->completion_ops, + hdr->dreq); + } +} + +static void filelayout_reset_read(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + struct rpc_task *task = &data->task; + + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { + dprintk("%s Reset task %5u for i/o through MDS " + "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, + data->task.tk_pid, + hdr->inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(hdr->inode), + data->args.count, + (unsigned long long)data->args.offset); + + task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode, + &hdr->pages, + hdr->completion_ops, + hdr->dreq); + } +} + +static void filelayout_fenceme(struct inode *inode, struct pnfs_layout_hdr *lo) +{ + if (!test_and_clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags)) + return; + pnfs_return_layout(inode); +} + +static int filelayout_async_handle_error(struct rpc_task *task, + struct nfs4_state *state, + struct nfs_client *clp, + struct pnfs_layout_segment *lseg) +{ + struct pnfs_layout_hdr *lo = lseg->pls_layout; + struct inode *inode = lo->plh_inode; + struct nfs_server *mds_server = NFS_SERVER(inode); + struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); + struct nfs_client *mds_client = mds_server->nfs_client; + struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table; + + if (task->tk_status >= 0) + return 0; + + switch (task->tk_status) { + /* MDS state errors */ + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_BAD_STATEID: + if (state == NULL) + break; + nfs_remove_bad_delegation(state->inode); + case -NFS4ERR_OPENMODE: + if (state == NULL) + break; + if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) + goto out_bad_stateid; + goto wait_on_recovery; + case -NFS4ERR_EXPIRED: + if (state != NULL) { + if (nfs4_schedule_stateid_recovery(mds_server, state) < 0) + goto out_bad_stateid; + } + nfs4_schedule_lease_recovery(mds_client); + goto wait_on_recovery; + /* DS session errors */ + case -NFS4ERR_BADSESSION: + case -NFS4ERR_BADSLOT: + case -NFS4ERR_BAD_HIGH_SLOT: + case -NFS4ERR_DEADSESSION: + case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: + case -NFS4ERR_SEQ_FALSE_RETRY: + case -NFS4ERR_SEQ_MISORDERED: + dprintk("%s ERROR %d, Reset session. Exchangeid " + "flags 0x%x\n", __func__, task->tk_status, + clp->cl_exchange_flags); + nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); + break; + case -NFS4ERR_DELAY: + case -NFS4ERR_GRACE: + rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); + break; + case -NFS4ERR_RETRY_UNCACHED_REP: + break; + /* Invalidate Layout errors */ + case -NFS4ERR_PNFS_NO_LAYOUT: + case -ESTALE: /* mapped NFS4ERR_STALE */ + case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */ + case -EISDIR: /* mapped NFS4ERR_ISDIR */ + case -NFS4ERR_FHEXPIRED: + case -NFS4ERR_WRONG_TYPE: + dprintk("%s Invalid layout error %d\n", __func__, + task->tk_status); + /* + * Destroy layout so new i/o will get a new layout. + * Layout will not be destroyed until all current lseg + * references are put. Mark layout as invalid to resend failed + * i/o and all i/o waiting on the slot table to the MDS until + * layout is destroyed and a new valid layout is obtained. + */ + pnfs_destroy_layout(NFS_I(inode)); + rpc_wake_up(&tbl->slot_tbl_waitq); + goto reset; + /* RPC connection errors */ + case -ECONNREFUSED: + case -EHOSTDOWN: + case -EHOSTUNREACH: + case -ENETUNREACH: + case -EIO: + case -ETIMEDOUT: + case -EPIPE: + dprintk("%s DS connection error %d\n", __func__, + task->tk_status); + nfs4_mark_deviceid_unavailable(devid); + set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); + rpc_wake_up(&tbl->slot_tbl_waitq); + /* fall through */ + default: +reset: + dprintk("%s Retry through MDS. Error %d\n", __func__, + task->tk_status); + return -NFS4ERR_RESET_TO_MDS; + } +out: + task->tk_status = 0; + return -EAGAIN; +out_bad_stateid: + task->tk_status = -EIO; + return 0; +wait_on_recovery: + rpc_sleep_on(&mds_client->cl_rpcwaitq, task, NULL); + if (test_bit(NFS4CLNT_MANAGER_RUNNING, &mds_client->cl_state) == 0) + rpc_wake_up_queued_task(&mds_client->cl_rpcwaitq, task); + goto out; +} + +/* NFS_PROTO call done callback routines */ + +static int filelayout_read_done_cb(struct rpc_task *task, + struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + int err; + + trace_nfs4_pnfs_read(data, task->tk_status); + err = filelayout_async_handle_error(task, data->args.context->state, + data->ds_clp, hdr->lseg); + + switch (err) { + case -NFS4ERR_RESET_TO_MDS: + filelayout_reset_read(data); + return task->tk_status; + case -EAGAIN: + rpc_restart_call_prepare(task); + return -EAGAIN; + } + + return 0; +} + +/* + * We reference the rpc_cred of the first WRITE that triggers the need for + * a LAYOUTCOMMIT, and use it to send the layoutcommit compound. + * rfc5661 is not clear about which credential should be used. + */ +static void +filelayout_set_layoutcommit(struct nfs_pgio_data *wdata) +{ + struct nfs_pgio_header *hdr = wdata->header; + + if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds || + wdata->res.verf->committed == NFS_FILE_SYNC) + return; + + pnfs_set_layoutcommit(wdata); + dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino, + (unsigned long) NFS_I(hdr->inode)->layout->plh_lwb); +} + +bool +filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node) +{ + return filelayout_test_devid_invalid(node) || + nfs4_test_deviceid_unavailable(node); +} + +static bool +filelayout_reset_to_mds(struct pnfs_layout_segment *lseg) +{ + struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg); + + return filelayout_test_devid_unavailable(node); +} + +/* + * Call ops for the async read/write cases + * In the case of dense layouts, the offset needs to be reset to its + * original value. + */ +static void filelayout_read_prepare(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *rdata = data; + + if (unlikely(test_bit(NFS_CONTEXT_BAD, &rdata->args.context->flags))) { + rpc_exit(task, -EIO); + return; + } + if (filelayout_reset_to_mds(rdata->header->lseg)) { + dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); + filelayout_reset_read(rdata); + rpc_exit(task, 0); + return; + } + rdata->pgio_done_cb = filelayout_read_done_cb; + + if (nfs41_setup_sequence(rdata->ds_clp->cl_session, + &rdata->args.seq_args, + &rdata->res.seq_res, + task)) + return; + if (nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context, + rdata->args.lock_context, FMODE_READ) == -EIO) + rpc_exit(task, -EIO); /* lost lock, terminate I/O */ +} + +static void filelayout_read_call_done(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *rdata = data; + + dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); + + if (test_bit(NFS_IOHDR_REDO, &rdata->header->flags) && + task->tk_status == 0) { + nfs41_sequence_done(task, &rdata->res.seq_res); + return; + } + + /* Note this may cause RPC to be resent */ + rdata->header->mds_ops->rpc_call_done(task, data); +} + +static void filelayout_read_count_stats(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *rdata = data; + + rpc_count_iostats(task, NFS_SERVER(rdata->header->inode)->client->cl_metrics); +} + +static void filelayout_read_release(void *data) +{ + struct nfs_pgio_data *rdata = data; + struct pnfs_layout_hdr *lo = rdata->header->lseg->pls_layout; + + filelayout_fenceme(lo->plh_inode, lo); + nfs_put_client(rdata->ds_clp); + rdata->header->mds_ops->rpc_release(data); +} + +static int filelayout_write_done_cb(struct rpc_task *task, + struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + int err; + + trace_nfs4_pnfs_write(data, task->tk_status); + err = filelayout_async_handle_error(task, data->args.context->state, + data->ds_clp, hdr->lseg); + + switch (err) { + case -NFS4ERR_RESET_TO_MDS: + filelayout_reset_write(data); + return task->tk_status; + case -EAGAIN: + rpc_restart_call_prepare(task); + return -EAGAIN; + } + + filelayout_set_layoutcommit(data); + return 0; +} + +/* Fake up some data that will cause nfs_commit_release to retry the writes. */ +static void prepare_to_resend_writes(struct nfs_commit_data *data) +{ + struct nfs_page *first = nfs_list_entry(data->pages.next); + + data->task.tk_status = 0; + memcpy(&data->verf.verifier, &first->wb_verf, + sizeof(data->verf.verifier)); + data->verf.verifier.data[0]++; /* ensure verifier mismatch */ +} + +static int filelayout_commit_done_cb(struct rpc_task *task, + struct nfs_commit_data *data) +{ + int err; + + trace_nfs4_pnfs_commit_ds(data, task->tk_status); + err = filelayout_async_handle_error(task, NULL, data->ds_clp, + data->lseg); + + switch (err) { + case -NFS4ERR_RESET_TO_MDS: + prepare_to_resend_writes(data); + return -EAGAIN; + case -EAGAIN: + rpc_restart_call_prepare(task); + return -EAGAIN; + } + + return 0; +} + +static void filelayout_write_prepare(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *wdata = data; + + if (unlikely(test_bit(NFS_CONTEXT_BAD, &wdata->args.context->flags))) { + rpc_exit(task, -EIO); + return; + } + if (filelayout_reset_to_mds(wdata->header->lseg)) { + dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); + filelayout_reset_write(wdata); + rpc_exit(task, 0); + return; + } + if (nfs41_setup_sequence(wdata->ds_clp->cl_session, + &wdata->args.seq_args, + &wdata->res.seq_res, + task)) + return; + if (nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context, + wdata->args.lock_context, FMODE_WRITE) == -EIO) + rpc_exit(task, -EIO); /* lost lock, terminate I/O */ +} + +static void filelayout_write_call_done(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *wdata = data; + + if (test_bit(NFS_IOHDR_REDO, &wdata->header->flags) && + task->tk_status == 0) { + nfs41_sequence_done(task, &wdata->res.seq_res); + return; + } + + /* Note this may cause RPC to be resent */ + wdata->header->mds_ops->rpc_call_done(task, data); +} + +static void filelayout_write_count_stats(struct rpc_task *task, void *data) +{ + struct nfs_pgio_data *wdata = data; + + rpc_count_iostats(task, NFS_SERVER(wdata->header->inode)->client->cl_metrics); +} + +static void filelayout_write_release(void *data) +{ + struct nfs_pgio_data *wdata = data; + struct pnfs_layout_hdr *lo = wdata->header->lseg->pls_layout; + + filelayout_fenceme(lo->plh_inode, lo); + nfs_put_client(wdata->ds_clp); + wdata->header->mds_ops->rpc_release(data); +} + +static void filelayout_commit_prepare(struct rpc_task *task, void *data) +{ + struct nfs_commit_data *wdata = data; + + nfs41_setup_sequence(wdata->ds_clp->cl_session, + &wdata->args.seq_args, + &wdata->res.seq_res, + task); +} + +static void filelayout_write_commit_done(struct rpc_task *task, void *data) +{ + struct nfs_commit_data *wdata = data; + + /* Note this may cause RPC to be resent */ + wdata->mds_ops->rpc_call_done(task, data); +} + +static void filelayout_commit_count_stats(struct rpc_task *task, void *data) +{ + struct nfs_commit_data *cdata = data; + + rpc_count_iostats(task, NFS_SERVER(cdata->inode)->client->cl_metrics); +} + +static void filelayout_commit_release(void *calldata) +{ + struct nfs_commit_data *data = calldata; + + data->completion_ops->completion(data); + pnfs_put_lseg(data->lseg); + nfs_put_client(data->ds_clp); + nfs_commitdata_release(data); +} + +static const struct rpc_call_ops filelayout_read_call_ops = { + .rpc_call_prepare = filelayout_read_prepare, + .rpc_call_done = filelayout_read_call_done, + .rpc_count_stats = filelayout_read_count_stats, + .rpc_release = filelayout_read_release, +}; + +static const struct rpc_call_ops filelayout_write_call_ops = { + .rpc_call_prepare = filelayout_write_prepare, + .rpc_call_done = filelayout_write_call_done, + .rpc_count_stats = filelayout_write_count_stats, + .rpc_release = filelayout_write_release, +}; + +static const struct rpc_call_ops filelayout_commit_call_ops = { + .rpc_call_prepare = filelayout_commit_prepare, + .rpc_call_done = filelayout_write_commit_done, + .rpc_count_stats = filelayout_commit_count_stats, + .rpc_release = filelayout_commit_release, +}; + +static enum pnfs_try_status +filelayout_read_pagelist(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + struct pnfs_layout_segment *lseg = hdr->lseg; + struct nfs4_pnfs_ds *ds; + struct rpc_clnt *ds_clnt; + loff_t offset = data->args.offset; + u32 j, idx; + struct nfs_fh *fh; + + dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", + __func__, hdr->inode->i_ino, + data->args.pgbase, (size_t)data->args.count, offset); + + /* Retrieve the correct rpc_client for the byte range */ + j = nfs4_fl_calc_j_index(lseg, offset); + idx = nfs4_fl_calc_ds_index(lseg, j); + ds = nfs4_fl_prepare_ds(lseg, idx); + if (!ds) + return PNFS_NOT_ATTEMPTED; + + ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); + if (IS_ERR(ds_clnt)) + return PNFS_NOT_ATTEMPTED; + + dprintk("%s USE DS: %s cl_count %d\n", __func__, + ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); + + /* No multipath support. Use first DS */ + atomic_inc(&ds->ds_clp->cl_count); + data->ds_clp = ds->ds_clp; + data->ds_idx = idx; + fh = nfs4_fl_select_ds_fh(lseg, j); + if (fh) + data->args.fh = fh; + + data->args.offset = filelayout_get_dserver_offset(lseg, offset); + data->mds_offset = offset; + + /* Perform an asynchronous read to ds */ + nfs_initiate_pgio(ds_clnt, data, + &filelayout_read_call_ops, 0, RPC_TASK_SOFTCONN); + return PNFS_ATTEMPTED; +} + +/* Perform async writes. */ +static enum pnfs_try_status +filelayout_write_pagelist(struct nfs_pgio_data *data, int sync) +{ + struct nfs_pgio_header *hdr = data->header; + struct pnfs_layout_segment *lseg = hdr->lseg; + struct nfs4_pnfs_ds *ds; + struct rpc_clnt *ds_clnt; + loff_t offset = data->args.offset; + u32 j, idx; + struct nfs_fh *fh; + + /* Retrieve the correct rpc_client for the byte range */ + j = nfs4_fl_calc_j_index(lseg, offset); + idx = nfs4_fl_calc_ds_index(lseg, j); + ds = nfs4_fl_prepare_ds(lseg, idx); + if (!ds) + return PNFS_NOT_ATTEMPTED; + + ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, hdr->inode); + if (IS_ERR(ds_clnt)) + return PNFS_NOT_ATTEMPTED; + + dprintk("%s ino %lu sync %d req %Zu@%llu DS: %s cl_count %d\n", + __func__, hdr->inode->i_ino, sync, (size_t) data->args.count, + offset, ds->ds_remotestr, atomic_read(&ds->ds_clp->cl_count)); + + data->pgio_done_cb = filelayout_write_done_cb; + atomic_inc(&ds->ds_clp->cl_count); + data->ds_clp = ds->ds_clp; + data->ds_idx = idx; + fh = nfs4_fl_select_ds_fh(lseg, j); + if (fh) + data->args.fh = fh; + + data->args.offset = filelayout_get_dserver_offset(lseg, offset); + + /* Perform an asynchronous write */ + nfs_initiate_pgio(ds_clnt, data, + &filelayout_write_call_ops, sync, + RPC_TASK_SOFTCONN); + return PNFS_ATTEMPTED; +} + +/* + * filelayout_check_layout() + * + * Make sure layout segment parameters are sane WRT the device. + * At this point no generic layer initialization of the lseg has occurred, + * and nothing has been added to the layout_hdr cache. + * + */ +static int +filelayout_check_layout(struct pnfs_layout_hdr *lo, + struct nfs4_filelayout_segment *fl, + struct nfs4_layoutget_res *lgr, + struct nfs4_deviceid *id, + gfp_t gfp_flags) +{ + struct nfs4_deviceid_node *d; + struct nfs4_file_layout_dsaddr *dsaddr; + int status = -EINVAL; + + dprintk("--> %s\n", __func__); + + /* FIXME: remove this check when layout segment support is added */ + if (lgr->range.offset != 0 || + lgr->range.length != NFS4_MAX_UINT64) { + dprintk("%s Only whole file layouts supported. Use MDS i/o\n", + __func__); + goto out; + } + + if (fl->pattern_offset > lgr->range.offset) { + dprintk("%s pattern_offset %lld too large\n", + __func__, fl->pattern_offset); + goto out; + } + + if (!fl->stripe_unit) { + dprintk("%s Invalid stripe unit (%u)\n", + __func__, fl->stripe_unit); + goto out; + } + + /* find and reference the deviceid */ + d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld, + NFS_SERVER(lo->plh_inode)->nfs_client, id); + if (d == NULL) { + dsaddr = filelayout_get_device_info(lo->plh_inode, id, + lo->plh_lc_cred, gfp_flags); + if (dsaddr == NULL) + goto out; + } else + dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node); + /* Found deviceid is unavailable */ + if (filelayout_test_devid_unavailable(&dsaddr->id_node)) + goto out_put; + + fl->dsaddr = dsaddr; + + if (fl->first_stripe_index >= dsaddr->stripe_count) { + dprintk("%s Bad first_stripe_index %u\n", + __func__, fl->first_stripe_index); + goto out_put; + } + + if ((fl->stripe_type == STRIPE_SPARSE && + fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || + (fl->stripe_type == STRIPE_DENSE && + fl->num_fh != dsaddr->stripe_count)) { + dprintk("%s num_fh %u not valid for given packing\n", + __func__, fl->num_fh); + goto out_put; + } + + status = 0; +out: + dprintk("--> %s returns %d\n", __func__, status); + return status; +out_put: + nfs4_fl_put_deviceid(dsaddr); + goto out; +} + +static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl) +{ + int i; + + for (i = 0; i < fl->num_fh; i++) { + if (!fl->fh_array[i]) + break; + kfree(fl->fh_array[i]); + } + kfree(fl->fh_array); + fl->fh_array = NULL; +} + +static void +_filelayout_free_lseg(struct nfs4_filelayout_segment *fl) +{ + filelayout_free_fh_array(fl); + kfree(fl); +} + +static int +filelayout_decode_layout(struct pnfs_layout_hdr *flo, + struct nfs4_filelayout_segment *fl, + struct nfs4_layoutget_res *lgr, + struct nfs4_deviceid *id, + gfp_t gfp_flags) +{ + struct xdr_stream stream; + struct xdr_buf buf; + struct page *scratch; + __be32 *p; + uint32_t nfl_util; + int i; + + dprintk("%s: set_layout_map Begin\n", __func__); + + scratch = alloc_page(gfp_flags); + if (!scratch) + return -ENOMEM; + + xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); + + /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), + * num_fh (4) */ + p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20); + if (unlikely(!p)) + goto out_err; + + memcpy(id, p, sizeof(*id)); + p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); + nfs4_print_deviceid(id); + + nfl_util = be32_to_cpup(p++); + if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) + fl->commit_through_mds = 1; + if (nfl_util & NFL4_UFLG_DENSE) + fl->stripe_type = STRIPE_DENSE; + else + fl->stripe_type = STRIPE_SPARSE; + fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; + + fl->first_stripe_index = be32_to_cpup(p++); + p = xdr_decode_hyper(p, &fl->pattern_offset); + fl->num_fh = be32_to_cpup(p++); + + dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", + __func__, nfl_util, fl->num_fh, fl->first_stripe_index, + fl->pattern_offset); + + /* Note that a zero value for num_fh is legal for STRIPE_SPARSE. + * Futher checking is done in filelayout_check_layout */ + if (fl->num_fh > + max(NFS4_PNFS_MAX_STRIPE_CNT, NFS4_PNFS_MAX_MULTI_CNT)) + goto out_err; + + if (fl->num_fh > 0) { + fl->fh_array = kcalloc(fl->num_fh, sizeof(fl->fh_array[0]), + gfp_flags); + if (!fl->fh_array) + goto out_err; + } + + for (i = 0; i < fl->num_fh; i++) { + /* Do we want to use a mempool here? */ + fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), gfp_flags); + if (!fl->fh_array[i]) + goto out_err_free; + + p = xdr_inline_decode(&stream, 4); + if (unlikely(!p)) + goto out_err_free; + fl->fh_array[i]->size = be32_to_cpup(p++); + if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { + printk(KERN_ERR "NFS: Too big fh %d received %d\n", + i, fl->fh_array[i]->size); + goto out_err_free; + } + + p = xdr_inline_decode(&stream, fl->fh_array[i]->size); + if (unlikely(!p)) + goto out_err_free; + memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); + dprintk("DEBUG: %s: fh len %d\n", __func__, + fl->fh_array[i]->size); + } + + __free_page(scratch); + return 0; + +out_err_free: + filelayout_free_fh_array(fl); +out_err: + __free_page(scratch); + return -EIO; +} + +static void +filelayout_free_lseg(struct pnfs_layout_segment *lseg) +{ + struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); + + dprintk("--> %s\n", __func__); + nfs4_fl_put_deviceid(fl->dsaddr); + /* This assumes a single RW lseg */ + if (lseg->pls_range.iomode == IOMODE_RW) { + struct nfs4_filelayout *flo; + + flo = FILELAYOUT_FROM_HDR(lseg->pls_layout); + flo->commit_info.nbuckets = 0; + kfree(flo->commit_info.buckets); + flo->commit_info.buckets = NULL; + } + _filelayout_free_lseg(fl); +} + +static int +filelayout_alloc_commit_info(struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo, + gfp_t gfp_flags) +{ + struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); + struct pnfs_commit_bucket *buckets; + int size, i; + + if (fl->commit_through_mds) + return 0; + + size = (fl->stripe_type == STRIPE_SPARSE) ? + fl->dsaddr->ds_num : fl->dsaddr->stripe_count; + + if (cinfo->ds->nbuckets >= size) { + /* This assumes there is only one IOMODE_RW lseg. What + * we really want to do is have a layout_hdr level + * dictionary of <multipath_list4, fh> keys, each + * associated with a struct list_head, populated by calls + * to filelayout_write_pagelist(). + * */ + return 0; + } + + buckets = kcalloc(size, sizeof(struct pnfs_commit_bucket), + gfp_flags); + if (!buckets) + return -ENOMEM; + for (i = 0; i < size; i++) { + INIT_LIST_HEAD(&buckets[i].written); + INIT_LIST_HEAD(&buckets[i].committing); + /* mark direct verifier as unset */ + buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW; + } + + spin_lock(cinfo->lock); + if (cinfo->ds->nbuckets >= size) + goto out; + for (i = 0; i < cinfo->ds->nbuckets; i++) { + list_splice(&cinfo->ds->buckets[i].written, + &buckets[i].written); + list_splice(&cinfo->ds->buckets[i].committing, + &buckets[i].committing); + buckets[i].direct_verf.committed = + cinfo->ds->buckets[i].direct_verf.committed; + buckets[i].wlseg = cinfo->ds->buckets[i].wlseg; + buckets[i].clseg = cinfo->ds->buckets[i].clseg; + } + swap(cinfo->ds->buckets, buckets); + cinfo->ds->nbuckets = size; +out: + spin_unlock(cinfo->lock); + kfree(buckets); + return 0; +} + +static struct pnfs_layout_segment * +filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, + struct nfs4_layoutget_res *lgr, + gfp_t gfp_flags) +{ + struct nfs4_filelayout_segment *fl; + int rc; + struct nfs4_deviceid id; + + dprintk("--> %s\n", __func__); + fl = kzalloc(sizeof(*fl), gfp_flags); + if (!fl) + return NULL; + + rc = filelayout_decode_layout(layoutid, fl, lgr, &id, gfp_flags); + if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id, gfp_flags)) { + _filelayout_free_lseg(fl); + return NULL; + } + return &fl->generic_hdr; +} + +/* + * filelayout_pg_test(). Called by nfs_can_coalesce_requests() + * + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. + */ +static size_t +filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, + struct nfs_page *req) +{ + unsigned int size; + u64 p_stripe, r_stripe; + u32 stripe_offset; + u64 segment_offset = pgio->pg_lseg->pls_range.offset; + u32 stripe_unit = FILELAYOUT_LSEG(pgio->pg_lseg)->stripe_unit; + + /* calls nfs_generic_pg_test */ + size = pnfs_generic_pg_test(pgio, prev, req); + if (!size) + return 0; + + /* see if req and prev are in the same stripe */ + if (prev) { + p_stripe = (u64)req_offset(prev) - segment_offset; + r_stripe = (u64)req_offset(req) - segment_offset; + do_div(p_stripe, stripe_unit); + do_div(r_stripe, stripe_unit); + + if (p_stripe != r_stripe) + return 0; + } + + /* calculate remaining bytes in the current stripe */ + div_u64_rem((u64)req_offset(req) - segment_offset, + stripe_unit, + &stripe_offset); + WARN_ON_ONCE(stripe_offset > stripe_unit); + if (stripe_offset >= stripe_unit) + return 0; + return min(stripe_unit - (unsigned int)stripe_offset, size); +} + +static void +filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req) +{ + if (!pgio->pg_lseg) + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + 0, + NFS4_MAX_UINT64, + IOMODE_READ, + GFP_KERNEL); + /* If no lseg, fall back to read through mds */ + if (pgio->pg_lseg == NULL) + nfs_pageio_reset_read_mds(pgio); +} + +static void +filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req) +{ + struct nfs_commit_info cinfo; + int status; + + if (!pgio->pg_lseg) + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + 0, + NFS4_MAX_UINT64, + IOMODE_RW, + GFP_NOFS); + /* If no lseg, fall back to write through mds */ + if (pgio->pg_lseg == NULL) + goto out_mds; + nfs_init_cinfo(&cinfo, pgio->pg_inode, pgio->pg_dreq); + status = filelayout_alloc_commit_info(pgio->pg_lseg, &cinfo, GFP_NOFS); + if (status < 0) { + pnfs_put_lseg(pgio->pg_lseg); + pgio->pg_lseg = NULL; + goto out_mds; + } + return; +out_mds: + nfs_pageio_reset_write_mds(pgio); +} + +static const struct nfs_pageio_ops filelayout_pg_read_ops = { + .pg_init = filelayout_pg_init_read, + .pg_test = filelayout_pg_test, + .pg_doio = pnfs_generic_pg_readpages, +}; + +static const struct nfs_pageio_ops filelayout_pg_write_ops = { + .pg_init = filelayout_pg_init_write, + .pg_test = filelayout_pg_test, + .pg_doio = pnfs_generic_pg_writepages, +}; + +static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j) +{ + if (fl->stripe_type == STRIPE_SPARSE) + return nfs4_fl_calc_ds_index(&fl->generic_hdr, j); + else + return j; +} + +/* The generic layer is about to remove the req from the commit list. + * If this will make the bucket empty, it will need to put the lseg reference. + */ +static void +filelayout_clear_request_commit(struct nfs_page *req, + struct nfs_commit_info *cinfo) +{ + struct pnfs_layout_segment *freeme = NULL; + + spin_lock(cinfo->lock); + if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags)) + goto out; + cinfo->ds->nwritten--; + if (list_is_singular(&req->wb_list)) { + struct pnfs_commit_bucket *bucket; + + bucket = list_first_entry(&req->wb_list, + struct pnfs_commit_bucket, + written); + freeme = bucket->wlseg; + bucket->wlseg = NULL; + } +out: + nfs_request_remove_commit_list(req, cinfo); + spin_unlock(cinfo->lock); + pnfs_put_lseg(freeme); +} + +static struct list_head * +filelayout_choose_commit_list(struct nfs_page *req, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); + u32 i, j; + struct list_head *list; + struct pnfs_commit_bucket *buckets; + + if (fl->commit_through_mds) + return &cinfo->mds->list; + + /* Note that we are calling nfs4_fl_calc_j_index on each page + * that ends up being committed to a data server. An attractive + * alternative is to add a field to nfs_write_data and nfs_page + * to store the value calculated in filelayout_write_pagelist + * and just use that here. + */ + j = nfs4_fl_calc_j_index(lseg, req_offset(req)); + i = select_bucket_index(fl, j); + spin_lock(cinfo->lock); + buckets = cinfo->ds->buckets; + list = &buckets[i].written; + if (list_empty(list)) { + /* Non-empty buckets hold a reference on the lseg. That ref + * is normally transferred to the COMMIT call and released + * there. It could also be released if the last req is pulled + * off due to a rewrite, in which case it will be done in + * filelayout_clear_request_commit + */ + buckets[i].wlseg = pnfs_get_lseg(lseg); + } + set_bit(PG_COMMIT_TO_DS, &req->wb_flags); + cinfo->ds->nwritten++; + spin_unlock(cinfo->lock); + return list; +} + +static void +filelayout_mark_request_commit(struct nfs_page *req, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + struct list_head *list; + + list = filelayout_choose_commit_list(req, lseg, cinfo); + nfs_request_add_commit_list(req, list, cinfo); +} + +static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + + if (flseg->stripe_type == STRIPE_SPARSE) + return i; + else + return nfs4_fl_calc_ds_index(lseg, i); +} + +static struct nfs_fh * +select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + + if (flseg->stripe_type == STRIPE_SPARSE) { + if (flseg->num_fh == 1) + i = 0; + else if (flseg->num_fh == 0) + /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ + return NULL; + } + return flseg->fh_array[i]; +} + +static int filelayout_initiate_commit(struct nfs_commit_data *data, int how) +{ + struct pnfs_layout_segment *lseg = data->lseg; + struct nfs4_pnfs_ds *ds; + struct rpc_clnt *ds_clnt; + u32 idx; + struct nfs_fh *fh; + + idx = calc_ds_index_from_commit(lseg, data->ds_commit_index); + ds = nfs4_fl_prepare_ds(lseg, idx); + if (!ds) + goto out_err; + + ds_clnt = nfs4_find_or_create_ds_client(ds->ds_clp, data->inode); + if (IS_ERR(ds_clnt)) + goto out_err; + + dprintk("%s ino %lu, how %d cl_count %d\n", __func__, + data->inode->i_ino, how, atomic_read(&ds->ds_clp->cl_count)); + data->commit_done_cb = filelayout_commit_done_cb; + atomic_inc(&ds->ds_clp->cl_count); + data->ds_clp = ds->ds_clp; + fh = select_ds_fh_from_commit(lseg, data->ds_commit_index); + if (fh) + data->args.fh = fh; + return nfs_initiate_commit(ds_clnt, data, + &filelayout_commit_call_ops, how, + RPC_TASK_SOFTCONN); +out_err: + prepare_to_resend_writes(data); + filelayout_commit_release(data); + return -EAGAIN; +} + +static int +transfer_commit_list(struct list_head *src, struct list_head *dst, + struct nfs_commit_info *cinfo, int max) +{ + struct nfs_page *req, *tmp; + int ret = 0; + + list_for_each_entry_safe(req, tmp, src, wb_list) { + if (!nfs_lock_request(req)) + continue; + kref_get(&req->wb_kref); + if (cond_resched_lock(cinfo->lock)) + list_safe_reset_next(req, tmp, wb_list); + nfs_request_remove_commit_list(req, cinfo); + clear_bit(PG_COMMIT_TO_DS, &req->wb_flags); + nfs_list_add_request(req, dst); + ret++; + if ((ret == max) && !cinfo->dreq) + break; + } + return ret; +} + +/* Note called with cinfo->lock held. */ +static int +filelayout_scan_ds_commit_list(struct pnfs_commit_bucket *bucket, + struct nfs_commit_info *cinfo, + int max) +{ + struct list_head *src = &bucket->written; + struct list_head *dst = &bucket->committing; + int ret; + + ret = transfer_commit_list(src, dst, cinfo, max); + if (ret) { + cinfo->ds->nwritten -= ret; + cinfo->ds->ncommitting += ret; + bucket->clseg = bucket->wlseg; + if (list_empty(src)) + bucket->wlseg = NULL; + else + pnfs_get_lseg(bucket->clseg); + } + return ret; +} + +/* Move reqs from written to committing lists, returning count of number moved. + * Note called with cinfo->lock held. + */ +static int filelayout_scan_commit_lists(struct nfs_commit_info *cinfo, + int max) +{ + int i, rv = 0, cnt; + + for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) { + cnt = filelayout_scan_ds_commit_list(&cinfo->ds->buckets[i], + cinfo, max); + max -= cnt; + rv += cnt; + } + return rv; +} + +/* Pull everything off the committing lists and dump into @dst */ +static void filelayout_recover_commit_reqs(struct list_head *dst, + struct nfs_commit_info *cinfo) +{ + struct pnfs_commit_bucket *b; + struct pnfs_layout_segment *freeme; + int i; + +restart: + spin_lock(cinfo->lock); + for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { + if (transfer_commit_list(&b->written, dst, cinfo, 0)) { + freeme = b->wlseg; + b->wlseg = NULL; + spin_unlock(cinfo->lock); + pnfs_put_lseg(freeme); + goto restart; + } + } + cinfo->ds->nwritten = 0; + spin_unlock(cinfo->lock); +} + +static unsigned int +alloc_ds_commits(struct nfs_commit_info *cinfo, struct list_head *list) +{ + struct pnfs_ds_commit_info *fl_cinfo; + struct pnfs_commit_bucket *bucket; + struct nfs_commit_data *data; + int i, j; + unsigned int nreq = 0; + struct pnfs_layout_segment *freeme; + + fl_cinfo = cinfo->ds; + bucket = fl_cinfo->buckets; + for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) { + if (list_empty(&bucket->committing)) + continue; + data = nfs_commitdata_alloc(); + if (!data) + break; + data->ds_commit_index = i; + spin_lock(cinfo->lock); + data->lseg = bucket->clseg; + bucket->clseg = NULL; + spin_unlock(cinfo->lock); + list_add(&data->pages, list); + nreq++; + } + + /* Clean up on error */ + for (j = i; j < fl_cinfo->nbuckets; j++, bucket++) { + if (list_empty(&bucket->committing)) + continue; + nfs_retry_commit(&bucket->committing, bucket->clseg, cinfo); + spin_lock(cinfo->lock); + freeme = bucket->clseg; + bucket->clseg = NULL; + spin_unlock(cinfo->lock); + pnfs_put_lseg(freeme); + } + /* Caller will clean up entries put on list */ + return nreq; +} + +/* This follows nfs_commit_list pretty closely */ +static int +filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages, + int how, struct nfs_commit_info *cinfo) +{ + struct nfs_commit_data *data, *tmp; + LIST_HEAD(list); + unsigned int nreq = 0; + + if (!list_empty(mds_pages)) { + data = nfs_commitdata_alloc(); + if (data != NULL) { + data->lseg = NULL; + list_add(&data->pages, &list); + nreq++; + } else + nfs_retry_commit(mds_pages, NULL, cinfo); + } + + nreq += alloc_ds_commits(cinfo, &list); + + if (nreq == 0) { + cinfo->completion_ops->error_cleanup(NFS_I(inode)); + goto out; + } + + atomic_add(nreq, &cinfo->mds->rpcs_out); + + list_for_each_entry_safe(data, tmp, &list, pages) { + list_del_init(&data->pages); + if (!data->lseg) { + nfs_init_commit(data, mds_pages, NULL, cinfo); + nfs_initiate_commit(NFS_CLIENT(inode), data, + data->mds_ops, how, 0); + } else { + struct pnfs_commit_bucket *buckets; + + buckets = cinfo->ds->buckets; + nfs_init_commit(data, &buckets[data->ds_commit_index].committing, data->lseg, cinfo); + filelayout_initiate_commit(data, how); + } + } +out: + cinfo->ds->ncommitting = 0; + return PNFS_ATTEMPTED; +} + +static void +filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d) +{ + nfs4_fl_free_deviceid(container_of(d, struct nfs4_file_layout_dsaddr, id_node)); +} + +static struct pnfs_layout_hdr * +filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) +{ + struct nfs4_filelayout *flo; + + flo = kzalloc(sizeof(*flo), gfp_flags); + return flo != NULL ? &flo->generic_hdr : NULL; +} + +static void +filelayout_free_layout_hdr(struct pnfs_layout_hdr *lo) +{ + kfree(FILELAYOUT_FROM_HDR(lo)); +} + +static struct pnfs_ds_commit_info * +filelayout_get_ds_info(struct inode *inode) +{ + struct pnfs_layout_hdr *layout = NFS_I(inode)->layout; + + if (layout == NULL) + return NULL; + else + return &FILELAYOUT_FROM_HDR(layout)->commit_info; +} + +static struct pnfs_layoutdriver_type filelayout_type = { + .id = LAYOUT_NFSV4_1_FILES, + .name = "LAYOUT_NFSV4_1_FILES", + .owner = THIS_MODULE, + .alloc_layout_hdr = filelayout_alloc_layout_hdr, + .free_layout_hdr = filelayout_free_layout_hdr, + .alloc_lseg = filelayout_alloc_lseg, + .free_lseg = filelayout_free_lseg, + .pg_read_ops = &filelayout_pg_read_ops, + .pg_write_ops = &filelayout_pg_write_ops, + .get_ds_info = &filelayout_get_ds_info, + .mark_request_commit = filelayout_mark_request_commit, + .clear_request_commit = filelayout_clear_request_commit, + .scan_commit_lists = filelayout_scan_commit_lists, + .recover_commit_reqs = filelayout_recover_commit_reqs, + .commit_pagelist = filelayout_commit_pagelist, + .read_pagelist = filelayout_read_pagelist, + .write_pagelist = filelayout_write_pagelist, + .free_deviceid_node = filelayout_free_deveiceid_node, +}; + +static int __init nfs4filelayout_init(void) +{ + printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", + __func__); + return pnfs_register_layoutdriver(&filelayout_type); +} + +static void __exit nfs4filelayout_exit(void) +{ + printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", + __func__); + pnfs_unregister_layoutdriver(&filelayout_type); +} + +MODULE_ALIAS("nfs-layouttype4-1"); + +module_init(nfs4filelayout_init); +module_exit(nfs4filelayout_exit); diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/filelayout/filelayout.h index bbf60dd2ab9..ffbddf2219e 100644 --- a/fs/nfs/nfs4filelayout.h +++ b/fs/nfs/filelayout/filelayout.h @@ -30,10 +30,17 @@ #ifndef FS_NFS_NFS4FILELAYOUT_H #define FS_NFS_NFS4FILELAYOUT_H -#include "pnfs.h" +#include "../pnfs.h" /* - * Field testing shows we need to support upto 4096 stripe indices. + * Default data server connection timeout and retrans vaules. + * Set by module paramters dataserver_timeo and dataserver_retrans. + */ +#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ +#define NFS4_DEF_DS_RETRANS 5 + +/* + * Field testing shows we need to support up to 4096 stripe indices. * We store each index as a u8 (u32 on the wire) to keep the memory footprint * reasonable. This in turn means we support a maximum of 256 * RFC 5661 multipath_list4 structures. @@ -41,22 +48,34 @@ #define NFS4_PNFS_MAX_STRIPE_CNT 4096 #define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */ +/* error codes for internal use */ +#define NFS4ERR_RESET_TO_MDS 12001 + enum stripetype4 { STRIPE_SPARSE = 1, STRIPE_DENSE = 2 }; /* Individual ip address */ +struct nfs4_pnfs_ds_addr { + struct sockaddr_storage da_addr; + size_t da_addrlen; + struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ + char *da_remotestr; /* human readable addr+port */ +}; + struct nfs4_pnfs_ds { struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ - u32 ds_ip_addr; - u32 ds_port; + char *ds_remotestr; /* comma sep list of addrs */ + struct list_head ds_addrs; struct nfs_client *ds_clp; atomic_t ds_count; + unsigned long ds_state; +#define NFS4DS_CONNECTING 0 /* ds is establishing connection */ }; struct nfs4_file_layout_dsaddr { - struct pnfs_deviceid_node deviceid; + struct nfs4_deviceid_node id_node; u32 stripe_count; u8 *stripe_indices; u32 ds_num; @@ -75,6 +94,17 @@ struct nfs4_filelayout_segment { struct nfs_fh **fh_array; }; +struct nfs4_filelayout { + struct pnfs_layout_hdr generic_hdr; + struct pnfs_ds_commit_info commit_info; +}; + +static inline struct nfs4_filelayout * +FILELAYOUT_FROM_HDR(struct pnfs_layout_hdr *lo) +{ + return container_of(lo, struct nfs4_filelayout, generic_hdr); +} + static inline struct nfs4_filelayout_segment * FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) { @@ -83,12 +113,44 @@ FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg) generic_hdr); } -extern void nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *); +static inline struct nfs4_deviceid_node * +FILELAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg) +{ + return &FILELAYOUT_LSEG(lseg)->dsaddr->id_node; +} + +static inline void +filelayout_mark_devid_invalid(struct nfs4_deviceid_node *node) +{ + u32 *p = (u32 *)&node->deviceid; + + printk(KERN_WARNING "NFS: Deviceid [%x%x%x%x] marked out of use.\n", + p[0], p[1], p[2], p[3]); + + set_bit(NFS_DEVICEID_INVALID, &node->flags); +} + +static inline bool +filelayout_test_devid_invalid(struct nfs4_deviceid_node *node) +{ + return test_bit(NFS_DEVICEID_INVALID, &node->flags); +} + +extern bool +filelayout_test_devid_unavailable(struct nfs4_deviceid_node *node); + +extern struct nfs_fh * +nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j); + extern void print_ds(struct nfs4_pnfs_ds *ds); -extern void print_deviceid(struct nfs4_deviceid *dev_id); -extern struct nfs4_file_layout_dsaddr * -nfs4_fl_find_get_deviceid(struct nfs_client *, struct nfs4_deviceid *dev_id); +u32 nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset); +u32 nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j); +struct nfs4_pnfs_ds *nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, + u32 ds_idx); +extern void nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); +extern void nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr); struct nfs4_file_layout_dsaddr * -get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id); +filelayout_get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, + struct rpc_cred *cred, gfp_t gfp_flags); #endif /* FS_NFS_NFS4FILELAYOUT_H */ diff --git a/fs/nfs/filelayout/filelayoutdev.c b/fs/nfs/filelayout/filelayoutdev.c new file mode 100644 index 00000000000..44bf0140a4c --- /dev/null +++ b/fs/nfs/filelayout/filelayoutdev.c @@ -0,0 +1,843 @@ +/* + * Device operations for the pnfs nfs4 file layout driver. + * + * Copyright (c) 2002 + * The Regents of the University of Michigan + * All Rights Reserved + * + * Dean Hildebrand <dhildebz@umich.edu> + * Garth Goodson <Garth.Goodson@netapp.com> + * + * Permission is granted to use, copy, create derivative works, and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the University of Michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. If + * the above copyright notice or any other identification of the + * University of Michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * This software is provided as is, without representation or warranty + * of any kind either express or implied, including without limitation + * the implied warranties of merchantability, fitness for a particular + * purpose, or noninfringement. The Regents of the University of + * Michigan shall not be liable for any damages, including special, + * indirect, incidental, or consequential damages, with respect to any + * claim arising out of or in connection with the use of the software, + * even if it has been or is hereafter advised of the possibility of + * such damages. + */ + +#include <linux/nfs_fs.h> +#include <linux/vmalloc.h> +#include <linux/module.h> +#include <linux/sunrpc/addr.h> + +#include "../internal.h" +#include "../nfs4session.h" +#include "filelayout.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +static unsigned int dataserver_timeo = NFS4_DEF_DS_TIMEO; +static unsigned int dataserver_retrans = NFS4_DEF_DS_RETRANS; + +/* + * Data server cache + * + * Data servers can be mapped to different device ids. + * nfs4_pnfs_ds reference counting + * - set to 1 on allocation + * - incremented when a device id maps a data server already in the cache. + * - decremented when deviceid is removed from the cache. + */ +static DEFINE_SPINLOCK(nfs4_ds_cache_lock); +static LIST_HEAD(nfs4_data_server_cache); + +/* Debug routines */ +void +print_ds(struct nfs4_pnfs_ds *ds) +{ + if (ds == NULL) { + printk("%s NULL device\n", __func__); + return; + } + printk(" ds %s\n" + " ref count %d\n" + " client %p\n" + " cl_exchange_flags %x\n", + ds->ds_remotestr, + atomic_read(&ds->ds_count), ds->ds_clp, + ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0); +} + +static bool +same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2) +{ + struct sockaddr_in *a, *b; + struct sockaddr_in6 *a6, *b6; + + if (addr1->sa_family != addr2->sa_family) + return false; + + switch (addr1->sa_family) { + case AF_INET: + a = (struct sockaddr_in *)addr1; + b = (struct sockaddr_in *)addr2; + + if (a->sin_addr.s_addr == b->sin_addr.s_addr && + a->sin_port == b->sin_port) + return true; + break; + + case AF_INET6: + a6 = (struct sockaddr_in6 *)addr1; + b6 = (struct sockaddr_in6 *)addr2; + + /* LINKLOCAL addresses must have matching scope_id */ + if (ipv6_addr_src_scope(&a6->sin6_addr) == + IPV6_ADDR_SCOPE_LINKLOCAL && + a6->sin6_scope_id != b6->sin6_scope_id) + return false; + + if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) && + a6->sin6_port == b6->sin6_port) + return true; + break; + + default: + dprintk("%s: unhandled address family: %u\n", + __func__, addr1->sa_family); + return false; + } + + return false; +} + +static bool +_same_data_server_addrs_locked(const struct list_head *dsaddrs1, + const struct list_head *dsaddrs2) +{ + struct nfs4_pnfs_ds_addr *da1, *da2; + + /* step through both lists, comparing as we go */ + for (da1 = list_first_entry(dsaddrs1, typeof(*da1), da_node), + da2 = list_first_entry(dsaddrs2, typeof(*da2), da_node); + da1 != NULL && da2 != NULL; + da1 = list_entry(da1->da_node.next, typeof(*da1), da_node), + da2 = list_entry(da2->da_node.next, typeof(*da2), da_node)) { + if (!same_sockaddr((struct sockaddr *)&da1->da_addr, + (struct sockaddr *)&da2->da_addr)) + return false; + } + if (da1 == NULL && da2 == NULL) + return true; + + return false; +} + +/* + * Lookup DS by addresses. nfs4_ds_cache_lock is held + */ +static struct nfs4_pnfs_ds * +_data_server_lookup_locked(const struct list_head *dsaddrs) +{ + struct nfs4_pnfs_ds *ds; + + list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) + if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs)) + return ds; + return NULL; +} + +/* + * Create an rpc connection to the nfs4_pnfs_ds data server + * Currently only supports IPv4 and IPv6 addresses + */ +static int +nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds) +{ + struct nfs_client *clp = ERR_PTR(-EIO); + struct nfs4_pnfs_ds_addr *da; + int status = 0; + + dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr, + mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor); + + list_for_each_entry(da, &ds->ds_addrs, da_node) { + dprintk("%s: DS %s: trying address %s\n", + __func__, ds->ds_remotestr, da->da_remotestr); + + clp = nfs4_set_ds_client(mds_srv->nfs_client, + (struct sockaddr *)&da->da_addr, + da->da_addrlen, IPPROTO_TCP, + dataserver_timeo, dataserver_retrans); + if (!IS_ERR(clp)) + break; + } + + if (IS_ERR(clp)) { + status = PTR_ERR(clp); + goto out; + } + + status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time); + if (status) + goto out_put; + + smp_wmb(); + ds->ds_clp = clp; + dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); +out: + return status; +out_put: + nfs_put_client(clp); + goto out; +} + +static void +destroy_ds(struct nfs4_pnfs_ds *ds) +{ + struct nfs4_pnfs_ds_addr *da; + + dprintk("--> %s\n", __func__); + ifdebug(FACILITY) + print_ds(ds); + + if (ds->ds_clp) + nfs_put_client(ds->ds_clp); + + while (!list_empty(&ds->ds_addrs)) { + da = list_first_entry(&ds->ds_addrs, + struct nfs4_pnfs_ds_addr, + da_node); + list_del_init(&da->da_node); + kfree(da->da_remotestr); + kfree(da); + } + + kfree(ds->ds_remotestr); + kfree(ds); +} + +void +nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) +{ + struct nfs4_pnfs_ds *ds; + int i; + + nfs4_print_deviceid(&dsaddr->id_node.deviceid); + + for (i = 0; i < dsaddr->ds_num; i++) { + ds = dsaddr->ds_list[i]; + if (ds != NULL) { + if (atomic_dec_and_lock(&ds->ds_count, + &nfs4_ds_cache_lock)) { + list_del_init(&ds->ds_node); + spin_unlock(&nfs4_ds_cache_lock); + destroy_ds(ds); + } + } + } + kfree(dsaddr->stripe_indices); + kfree(dsaddr); +} + +/* + * Create a string with a human readable address and port to avoid + * complicated setup around many dprinks. + */ +static char * +nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags) +{ + struct nfs4_pnfs_ds_addr *da; + char *remotestr; + size_t len; + char *p; + + len = 3; /* '{', '}' and eol */ + list_for_each_entry(da, dsaddrs, da_node) { + len += strlen(da->da_remotestr) + 1; /* string plus comma */ + } + + remotestr = kzalloc(len, gfp_flags); + if (!remotestr) + return NULL; + + p = remotestr; + *(p++) = '{'; + len--; + list_for_each_entry(da, dsaddrs, da_node) { + size_t ll = strlen(da->da_remotestr); + + if (ll > len) + goto out_err; + + memcpy(p, da->da_remotestr, ll); + p += ll; + len -= ll; + + if (len < 1) + goto out_err; + (*p++) = ','; + len--; + } + if (len < 2) + goto out_err; + *(p++) = '}'; + *p = '\0'; + return remotestr; +out_err: + kfree(remotestr); + return NULL; +} + +static struct nfs4_pnfs_ds * +nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags) +{ + struct nfs4_pnfs_ds *tmp_ds, *ds = NULL; + char *remotestr; + + if (list_empty(dsaddrs)) { + dprintk("%s: no addresses defined\n", __func__); + goto out; + } + + ds = kzalloc(sizeof(*ds), gfp_flags); + if (!ds) + goto out; + + /* this is only used for debugging, so it's ok if its NULL */ + remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags); + + spin_lock(&nfs4_ds_cache_lock); + tmp_ds = _data_server_lookup_locked(dsaddrs); + if (tmp_ds == NULL) { + INIT_LIST_HEAD(&ds->ds_addrs); + list_splice_init(dsaddrs, &ds->ds_addrs); + ds->ds_remotestr = remotestr; + atomic_set(&ds->ds_count, 1); + INIT_LIST_HEAD(&ds->ds_node); + ds->ds_clp = NULL; + list_add(&ds->ds_node, &nfs4_data_server_cache); + dprintk("%s add new data server %s\n", __func__, + ds->ds_remotestr); + } else { + kfree(remotestr); + kfree(ds); + atomic_inc(&tmp_ds->ds_count); + dprintk("%s data server %s found, inc'ed ds_count to %d\n", + __func__, tmp_ds->ds_remotestr, + atomic_read(&tmp_ds->ds_count)); + ds = tmp_ds; + } + spin_unlock(&nfs4_ds_cache_lock); +out: + return ds; +} + +/* + * Currently only supports ipv4, ipv6 and one multi-path address. + */ +static struct nfs4_pnfs_ds_addr * +decode_ds_addr(struct net *net, struct xdr_stream *streamp, gfp_t gfp_flags) +{ + struct nfs4_pnfs_ds_addr *da = NULL; + char *buf, *portstr; + __be16 port; + int nlen, rlen; + int tmp[2]; + __be32 *p; + char *netid, *match_netid; + size_t len, match_netid_len; + char *startsep = ""; + char *endsep = ""; + + + /* r_netid */ + p = xdr_inline_decode(streamp, 4); + if (unlikely(!p)) + goto out_err; + nlen = be32_to_cpup(p++); + + p = xdr_inline_decode(streamp, nlen); + if (unlikely(!p)) + goto out_err; + + netid = kmalloc(nlen+1, gfp_flags); + if (unlikely(!netid)) + goto out_err; + + netid[nlen] = '\0'; + memcpy(netid, p, nlen); + + /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */ + p = xdr_inline_decode(streamp, 4); + if (unlikely(!p)) + goto out_free_netid; + rlen = be32_to_cpup(p); + + p = xdr_inline_decode(streamp, rlen); + if (unlikely(!p)) + goto out_free_netid; + + /* port is ".ABC.DEF", 8 chars max */ + if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) { + dprintk("%s: Invalid address, length %d\n", __func__, + rlen); + goto out_free_netid; + } + buf = kmalloc(rlen + 1, gfp_flags); + if (!buf) { + dprintk("%s: Not enough memory\n", __func__); + goto out_free_netid; + } + buf[rlen] = '\0'; + memcpy(buf, p, rlen); + + /* replace port '.' with '-' */ + portstr = strrchr(buf, '.'); + if (!portstr) { + dprintk("%s: Failed finding expected dot in port\n", + __func__); + goto out_free_buf; + } + *portstr = '-'; + + /* find '.' between address and port */ + portstr = strrchr(buf, '.'); + if (!portstr) { + dprintk("%s: Failed finding expected dot between address and " + "port\n", __func__); + goto out_free_buf; + } + *portstr = '\0'; + + da = kzalloc(sizeof(*da), gfp_flags); + if (unlikely(!da)) + goto out_free_buf; + + INIT_LIST_HEAD(&da->da_node); + + if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr, + sizeof(da->da_addr))) { + dprintk("%s: error parsing address %s\n", __func__, buf); + goto out_free_da; + } + + portstr++; + sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]); + port = htons((tmp[0] << 8) | (tmp[1])); + + switch (da->da_addr.ss_family) { + case AF_INET: + ((struct sockaddr_in *)&da->da_addr)->sin_port = port; + da->da_addrlen = sizeof(struct sockaddr_in); + match_netid = "tcp"; + match_netid_len = 3; + break; + + case AF_INET6: + ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port; + da->da_addrlen = sizeof(struct sockaddr_in6); + match_netid = "tcp6"; + match_netid_len = 4; + startsep = "["; + endsep = "]"; + break; + + default: + dprintk("%s: unsupported address family: %u\n", + __func__, da->da_addr.ss_family); + goto out_free_da; + } + + if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) { + dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n", + __func__, netid, match_netid); + goto out_free_da; + } + + /* save human readable address */ + len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7; + da->da_remotestr = kzalloc(len, gfp_flags); + + /* NULL is ok, only used for dprintk */ + if (da->da_remotestr) + snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep, + buf, endsep, ntohs(port)); + + dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr); + kfree(buf); + kfree(netid); + return da; + +out_free_da: + kfree(da); +out_free_buf: + dprintk("%s: Error parsing DS addr: %s\n", __func__, buf); + kfree(buf); +out_free_netid: + kfree(netid); +out_err: + return NULL; +} + +/* Decode opaque device data and return the result */ +static struct nfs4_file_layout_dsaddr* +decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags) +{ + int i; + u32 cnt, num; + u8 *indexp; + __be32 *p; + u8 *stripe_indices; + u8 max_stripe_index; + struct nfs4_file_layout_dsaddr *dsaddr = NULL; + struct xdr_stream stream; + struct xdr_buf buf; + struct page *scratch; + struct list_head dsaddrs; + struct nfs4_pnfs_ds_addr *da; + + /* set up xdr stream */ + scratch = alloc_page(gfp_flags); + if (!scratch) + goto out_err; + + xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); + + /* Get the stripe count (number of stripe index) */ + p = xdr_inline_decode(&stream, 4); + if (unlikely(!p)) + goto out_err_free_scratch; + + cnt = be32_to_cpup(p); + dprintk("%s stripe count %d\n", __func__, cnt); + if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) { + printk(KERN_WARNING "NFS: %s: stripe count %d greater than " + "supported maximum %d\n", __func__, + cnt, NFS4_PNFS_MAX_STRIPE_CNT); + goto out_err_free_scratch; + } + + /* read stripe indices */ + stripe_indices = kcalloc(cnt, sizeof(u8), gfp_flags); + if (!stripe_indices) + goto out_err_free_scratch; + + p = xdr_inline_decode(&stream, cnt << 2); + if (unlikely(!p)) + goto out_err_free_stripe_indices; + + indexp = &stripe_indices[0]; + max_stripe_index = 0; + for (i = 0; i < cnt; i++) { + *indexp = be32_to_cpup(p++); + max_stripe_index = max(max_stripe_index, *indexp); + indexp++; + } + + /* Check the multipath list count */ + p = xdr_inline_decode(&stream, 4); + if (unlikely(!p)) + goto out_err_free_stripe_indices; + + num = be32_to_cpup(p); + dprintk("%s ds_num %u\n", __func__, num); + if (num > NFS4_PNFS_MAX_MULTI_CNT) { + printk(KERN_WARNING "NFS: %s: multipath count %d greater than " + "supported maximum %d\n", __func__, + num, NFS4_PNFS_MAX_MULTI_CNT); + goto out_err_free_stripe_indices; + } + + /* validate stripe indices are all < num */ + if (max_stripe_index >= num) { + printk(KERN_WARNING "NFS: %s: stripe index %u >= num ds %u\n", + __func__, max_stripe_index, num); + goto out_err_free_stripe_indices; + } + + dsaddr = kzalloc(sizeof(*dsaddr) + + (sizeof(struct nfs4_pnfs_ds *) * (num - 1)), + gfp_flags); + if (!dsaddr) + goto out_err_free_stripe_indices; + + dsaddr->stripe_count = cnt; + dsaddr->stripe_indices = stripe_indices; + stripe_indices = NULL; + dsaddr->ds_num = num; + nfs4_init_deviceid_node(&dsaddr->id_node, + NFS_SERVER(ino)->pnfs_curr_ld, + NFS_SERVER(ino)->nfs_client, + &pdev->dev_id); + + INIT_LIST_HEAD(&dsaddrs); + + for (i = 0; i < dsaddr->ds_num; i++) { + int j; + u32 mp_count; + + p = xdr_inline_decode(&stream, 4); + if (unlikely(!p)) + goto out_err_free_deviceid; + + mp_count = be32_to_cpup(p); /* multipath count */ + for (j = 0; j < mp_count; j++) { + da = decode_ds_addr(NFS_SERVER(ino)->nfs_client->cl_net, + &stream, gfp_flags); + if (da) + list_add_tail(&da->da_node, &dsaddrs); + } + if (list_empty(&dsaddrs)) { + dprintk("%s: no suitable DS addresses found\n", + __func__); + goto out_err_free_deviceid; + } + + dsaddr->ds_list[i] = nfs4_pnfs_ds_add(&dsaddrs, gfp_flags); + if (!dsaddr->ds_list[i]) + goto out_err_drain_dsaddrs; + + /* If DS was already in cache, free ds addrs */ + while (!list_empty(&dsaddrs)) { + da = list_first_entry(&dsaddrs, + struct nfs4_pnfs_ds_addr, + da_node); + list_del_init(&da->da_node); + kfree(da->da_remotestr); + kfree(da); + } + } + + __free_page(scratch); + return dsaddr; + +out_err_drain_dsaddrs: + while (!list_empty(&dsaddrs)) { + da = list_first_entry(&dsaddrs, struct nfs4_pnfs_ds_addr, + da_node); + list_del_init(&da->da_node); + kfree(da->da_remotestr); + kfree(da); + } +out_err_free_deviceid: + nfs4_fl_free_deviceid(dsaddr); + /* stripe_indicies was part of dsaddr */ + goto out_err_free_scratch; +out_err_free_stripe_indices: + kfree(stripe_indices); +out_err_free_scratch: + __free_page(scratch); +out_err: + dprintk("%s ERROR: returning NULL\n", __func__); + return NULL; +} + +/* + * Decode the opaque device specified in 'dev' and add it to the cache of + * available devices. + */ +static struct nfs4_file_layout_dsaddr * +decode_and_add_device(struct inode *inode, struct pnfs_device *dev, gfp_t gfp_flags) +{ + struct nfs4_deviceid_node *d; + struct nfs4_file_layout_dsaddr *n, *new; + + new = decode_device(inode, dev, gfp_flags); + if (!new) { + printk(KERN_WARNING "NFS: %s: Could not decode or add device\n", + __func__); + return NULL; + } + + d = nfs4_insert_deviceid_node(&new->id_node); + n = container_of(d, struct nfs4_file_layout_dsaddr, id_node); + if (n != new) { + nfs4_fl_free_deviceid(new); + return n; + } + + return new; +} + +/* + * Retrieve the information for dev_id, add it to the list + * of available devices, and return it. + */ +struct nfs4_file_layout_dsaddr * +filelayout_get_device_info(struct inode *inode, + struct nfs4_deviceid *dev_id, + struct rpc_cred *cred, + gfp_t gfp_flags) +{ + struct pnfs_device *pdev = NULL; + u32 max_resp_sz; + int max_pages; + struct page **pages = NULL; + struct nfs4_file_layout_dsaddr *dsaddr = NULL; + int rc, i; + struct nfs_server *server = NFS_SERVER(inode); + + /* + * Use the session max response size as the basis for setting + * GETDEVICEINFO's maxcount + */ + max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; + max_pages = nfs_page_array_len(0, max_resp_sz); + dprintk("%s inode %p max_resp_sz %u max_pages %d\n", + __func__, inode, max_resp_sz, max_pages); + + pdev = kzalloc(sizeof(struct pnfs_device), gfp_flags); + if (pdev == NULL) + return NULL; + + pages = kzalloc(max_pages * sizeof(struct page *), gfp_flags); + if (pages == NULL) { + kfree(pdev); + return NULL; + } + for (i = 0; i < max_pages; i++) { + pages[i] = alloc_page(gfp_flags); + if (!pages[i]) + goto out_free; + } + + memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id)); + pdev->layout_type = LAYOUT_NFSV4_1_FILES; + pdev->pages = pages; + pdev->pgbase = 0; + pdev->pglen = max_resp_sz; + pdev->mincount = 0; + pdev->maxcount = max_resp_sz - nfs41_maxgetdevinfo_overhead; + + rc = nfs4_proc_getdeviceinfo(server, pdev, cred); + dprintk("%s getdevice info returns %d\n", __func__, rc); + if (rc) + goto out_free; + + /* + * Found new device, need to decode it and then add it to the + * list of known devices for this mountpoint. + */ + dsaddr = decode_and_add_device(inode, pdev, gfp_flags); +out_free: + for (i = 0; i < max_pages; i++) + __free_page(pages[i]); + kfree(pages); + kfree(pdev); + dprintk("<-- %s dsaddr %p\n", __func__, dsaddr); + return dsaddr; +} + +void +nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) +{ + nfs4_put_deviceid_node(&dsaddr->id_node); +} + +/* + * Want res = (offset - layout->pattern_offset)/ layout->stripe_unit + * Then: ((res + fsi) % dsaddr->stripe_count) + */ +u32 +nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + u64 tmp; + + tmp = offset - flseg->pattern_offset; + do_div(tmp, flseg->stripe_unit); + tmp += flseg->first_stripe_index; + return do_div(tmp, flseg->dsaddr->stripe_count); +} + +u32 +nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j) +{ + return FILELAYOUT_LSEG(lseg)->dsaddr->stripe_indices[j]; +} + +struct nfs_fh * +nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j) +{ + struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); + u32 i; + + if (flseg->stripe_type == STRIPE_SPARSE) { + if (flseg->num_fh == 1) + i = 0; + else if (flseg->num_fh == 0) + /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ + return NULL; + else + i = nfs4_fl_calc_ds_index(lseg, j); + } else + i = j; + return flseg->fh_array[i]; +} + +static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds) +{ + might_sleep(); + wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING, + nfs_wait_bit_killable, TASK_KILLABLE); +} + +static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds) +{ + smp_mb__before_atomic(); + clear_bit(NFS4DS_CONNECTING, &ds->ds_state); + smp_mb__after_atomic(); + wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING); +} + + +struct nfs4_pnfs_ds * +nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx) +{ + struct nfs4_file_layout_dsaddr *dsaddr = FILELAYOUT_LSEG(lseg)->dsaddr; + struct nfs4_pnfs_ds *ds = dsaddr->ds_list[ds_idx]; + struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); + struct nfs4_pnfs_ds *ret = ds; + + if (ds == NULL) { + printk(KERN_ERR "NFS: %s: No data server for offset index %d\n", + __func__, ds_idx); + filelayout_mark_devid_invalid(devid); + goto out; + } + smp_rmb(); + if (ds->ds_clp) + goto out_test_devid; + + if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) { + struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode); + int err; + + err = nfs4_ds_connect(s, ds); + if (err) + nfs4_mark_deviceid_unavailable(devid); + nfs4_clear_ds_conn_bit(ds); + } else { + /* Either ds is connected, or ds is NULL */ + nfs4_wait_ds_connect(ds); + } +out_test_devid: + if (filelayout_test_devid_unavailable(devid)) + ret = NULL; +out: + return ret; +} + +module_param(dataserver_retrans, uint, 0644); +MODULE_PARM_DESC(dataserver_retrans, "The number of times the NFSv4.1 client " + "retries a request before it attempts further " + " recovery action."); +module_param(dataserver_timeo, uint, 0644); +MODULE_PARM_DESC(dataserver_timeo, "The time (in tenths of a second) the " + "NFSv4.1 client waits for a response from a " + " data server before it retries an NFS request."); diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c index 5b1006480bc..7cf2c4699b0 100644 --- a/fs/nfs/fscache-index.c +++ b/fs/nfs/fscache-index.c @@ -212,7 +212,7 @@ static uint16_t nfs_fscache_inode_get_aux(const void *cookie_netfs_data, auxdata.ctime = nfsi->vfs_inode.i_ctime; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) - auxdata.change_attr = nfsi->change_attr; + auxdata.change_attr = nfsi->vfs_inode.i_version; if (bufmax > sizeof(auxdata)) bufmax = sizeof(auxdata); @@ -244,7 +244,7 @@ enum fscache_checkaux nfs_fscache_inode_check_aux(void *cookie_netfs_data, auxdata.ctime = nfsi->vfs_inode.i_ctime; if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) - auxdata.change_attr = nfsi->change_attr; + auxdata.change_attr = nfsi->vfs_inode.i_version; if (memcmp(data, &auxdata, datalen) != 0) return FSCACHE_CHECKAUX_OBSOLETE; diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index ce153a6b3ae..3ef01f0ba0b 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -39,7 +39,7 @@ void nfs_fscache_get_client_cookie(struct nfs_client *clp) /* create a cache index for looking up filehandles */ clp->fscache = fscache_acquire_cookie(nfs_fscache_netfs.primary_index, &nfs_fscache_server_index_def, - clp); + clp, true); dfprintk(FSCACHE, "NFS: get client cookie (0x%p/0x%p)\n", clp, clp->fscache); } @@ -64,23 +64,12 @@ void nfs_fscache_release_client_cookie(struct nfs_client *clp) * either by the 'fsc=xxx' option to mount, or by inheriting it from the parent * superblock across an automount point of some nature. */ -void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, - struct nfs_clone_mount *mntdata) +void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int ulen) { struct nfs_fscache_key *key, *xkey; struct nfs_server *nfss = NFS_SB(sb); struct rb_node **p, *parent; - int diff, ulen; - - if (uniq) { - ulen = strlen(uniq); - } else if (mntdata) { - struct nfs_server *mnt_s = NFS_SB(mntdata->sb); - if (mnt_s->fscache_key) { - uniq = mnt_s->fscache_key->key.uniquifier; - ulen = mnt_s->fscache_key->key.uniq_len; - } - } + int diff; if (!uniq) { uniq = ""; @@ -150,7 +139,7 @@ void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, /* create a cache index for looking up filehandles */ nfss->fscache = fscache_acquire_cookie(nfss->nfs_client->fscache, &nfs_fscache_super_index_def, - nfss); + nfss, true); dfprintk(FSCACHE, "NFS: get superblock cookie (0x%p/0x%p)\n", nfss, nfss->fscache); return; @@ -189,164 +178,79 @@ void nfs_fscache_release_super_cookie(struct super_block *sb) /* * Initialise the per-inode cache cookie pointer for an NFS inode. */ -void nfs_fscache_init_inode_cookie(struct inode *inode) -{ - NFS_I(inode)->fscache = NULL; - if (S_ISREG(inode->i_mode)) - set_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); -} - -/* - * Get the per-inode cache cookie for an NFS inode. - */ -static void nfs_fscache_enable_inode_cookie(struct inode *inode) +void nfs_fscache_init_inode(struct inode *inode) { - struct super_block *sb = inode->i_sb; struct nfs_inode *nfsi = NFS_I(inode); - if (nfsi->fscache || !NFS_FSCACHE(inode)) + nfsi->fscache = NULL; + if (!S_ISREG(inode->i_mode)) return; - - if ((NFS_SB(sb)->options & NFS_OPTION_FSCACHE)) { - nfsi->fscache = fscache_acquire_cookie( - NFS_SB(sb)->fscache, - &nfs_fscache_inode_object_def, - nfsi); - - dfprintk(FSCACHE, "NFS: get FH cookie (0x%p/0x%p/0x%p)\n", - sb, nfsi, nfsi->fscache); - } + nfsi->fscache = fscache_acquire_cookie(NFS_SB(inode->i_sb)->fscache, + &nfs_fscache_inode_object_def, + nfsi, false); } /* * Release a per-inode cookie. */ -void nfs_fscache_release_inode_cookie(struct inode *inode) -{ - struct nfs_inode *nfsi = NFS_I(inode); - - dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", - nfsi, nfsi->fscache); - - fscache_relinquish_cookie(nfsi->fscache, 0); - nfsi->fscache = NULL; -} - -/* - * Retire a per-inode cookie, destroying the data attached to it. - */ -void nfs_fscache_zap_inode_cookie(struct inode *inode) +void nfs_fscache_clear_inode(struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); + struct fscache_cookie *cookie = nfs_i_fscache(inode); - dfprintk(FSCACHE, "NFS: zapping cookie (0x%p/0x%p)\n", - nfsi, nfsi->fscache); + dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie); - fscache_relinquish_cookie(nfsi->fscache, 1); + fscache_relinquish_cookie(cookie, false); nfsi->fscache = NULL; } -/* - * Turn off the cache with regard to a per-inode cookie if opened for writing, - * invalidating all the pages in the page cache relating to the associated - * inode to clear the per-page caching. - */ -static void nfs_fscache_disable_inode_cookie(struct inode *inode) +static bool nfs_fscache_can_enable(void *data) { - clear_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); - - if (NFS_I(inode)->fscache) { - dfprintk(FSCACHE, - "NFS: nfsi 0x%p turning cache off\n", NFS_I(inode)); + struct inode *inode = data; - /* Need to invalidate any mapped pages that were read in before - * turning off the cache. - */ - if (inode->i_mapping && inode->i_mapping->nrpages) - invalidate_inode_pages2(inode->i_mapping); - - nfs_fscache_zap_inode_cookie(inode); - } -} - -/* - * wait_on_bit() sleep function for uninterruptible waiting - */ -static int nfs_fscache_wait_bit(void *flags) -{ - schedule(); - return 0; + return !inode_is_open_for_write(inode); } /* - * Lock against someone else trying to also acquire or relinquish a cookie - */ -static inline void nfs_fscache_inode_lock(struct inode *inode) -{ - struct nfs_inode *nfsi = NFS_I(inode); - - while (test_and_set_bit(NFS_INO_FSCACHE_LOCK, &nfsi->flags)) - wait_on_bit(&nfsi->flags, NFS_INO_FSCACHE_LOCK, - nfs_fscache_wait_bit, TASK_UNINTERRUPTIBLE); -} - -/* - * Unlock cookie management lock - */ -static inline void nfs_fscache_inode_unlock(struct inode *inode) -{ - struct nfs_inode *nfsi = NFS_I(inode); - - smp_mb__before_clear_bit(); - clear_bit(NFS_INO_FSCACHE_LOCK, &nfsi->flags); - smp_mb__after_clear_bit(); - wake_up_bit(&nfsi->flags, NFS_INO_FSCACHE_LOCK); -} - -/* - * Decide if we should enable or disable local caching for this inode. - * - For now, with NFS, only regular files that are open read-only will be able - * to use the cache. - * - May be invoked multiple times in parallel by parallel nfs_open() functions. - */ -void nfs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) -{ - if (NFS_FSCACHE(inode)) { - nfs_fscache_inode_lock(inode); - if ((filp->f_flags & O_ACCMODE) != O_RDONLY) - nfs_fscache_disable_inode_cookie(inode); - else - nfs_fscache_enable_inode_cookie(inode); - nfs_fscache_inode_unlock(inode); - } -} - -/* - * Replace a per-inode cookie due to revalidation detecting a file having - * changed on the server. + * Enable or disable caching for a file that is being opened as appropriate. + * The cookie is allocated when the inode is initialised, but is not enabled at + * that time. Enablement is deferred to file-open time to avoid stat() and + * access() thrashing the cache. + * + * For now, with NFS, only regular files that are open read-only will be able + * to use the cache. + * + * We enable the cache for an inode if we open it read-only and it isn't + * currently open for writing. We disable the cache if the inode is open + * write-only. + * + * The caller uses the file struct to pin i_writecount on the inode before + * calling us when a file is opened for writing, so we can make use of that. + * + * Note that this may be invoked multiple times in parallel by parallel + * nfs_open() functions. */ -void nfs_fscache_reset_inode_cookie(struct inode *inode) +void nfs_fscache_open_file(struct inode *inode, struct file *filp) { struct nfs_inode *nfsi = NFS_I(inode); - struct nfs_server *nfss = NFS_SERVER(inode); - struct fscache_cookie *old = nfsi->fscache; + struct fscache_cookie *cookie = nfs_i_fscache(inode); - nfs_fscache_inode_lock(inode); - if (nfsi->fscache) { - /* retire the current fscache cache and get a new one */ - fscache_relinquish_cookie(nfsi->fscache, 1); - - nfsi->fscache = fscache_acquire_cookie( - nfss->nfs_client->fscache, - &nfs_fscache_inode_object_def, - nfsi); + if (!fscache_cookie_valid(cookie)) + return; - dfprintk(FSCACHE, - "NFS: revalidation new cookie (0x%p/0x%p/0x%p/0x%p)\n", - nfss, nfsi, old, nfsi->fscache); + if (inode_is_open_for_write(inode)) { + dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi); + clear_bit(NFS_INO_FSCACHE, &nfsi->flags); + fscache_disable_cookie(cookie, true); + fscache_uncache_all_inode_pages(cookie, inode); + } else { + dfprintk(FSCACHE, "NFS: nfsi 0x%p enabling cache\n", nfsi); + fscache_enable_cookie(cookie, nfs_fscache_can_enable, inode); + if (fscache_cookie_enabled(cookie)) + set_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); } - nfs_fscache_inode_unlock(inode); } +EXPORT_SYMBOL_GPL(nfs_fscache_open_file); /* * Release the caching state associated with a page, if the page isn't busy @@ -356,12 +260,11 @@ void nfs_fscache_reset_inode_cookie(struct inode *inode) int nfs_fscache_release_page(struct page *page, gfp_t gfp) { if (PageFsCache(page)) { - struct nfs_inode *nfsi = NFS_I(page->mapping->host); - struct fscache_cookie *cookie = nfsi->fscache; + struct fscache_cookie *cookie = nfs_i_fscache(page->mapping->host); BUG_ON(!cookie); dfprintk(FSCACHE, "NFS: fscache releasepage (0x%p/0x%p/0x%p)\n", - cookie, page, nfsi); + cookie, page, NFS_I(page->mapping->host)); if (!fscache_maybe_release_page(cookie, page, gfp)) return 0; @@ -379,13 +282,12 @@ int nfs_fscache_release_page(struct page *page, gfp_t gfp) */ void __nfs_fscache_invalidate_page(struct page *page, struct inode *inode) { - struct nfs_inode *nfsi = NFS_I(inode); - struct fscache_cookie *cookie = nfsi->fscache; + struct fscache_cookie *cookie = nfs_i_fscache(inode); BUG_ON(!cookie); dfprintk(FSCACHE, "NFS: fscache invalidatepage (0x%p/0x%p/0x%p)\n", - cookie, page, nfsi); + cookie, page, NFS_I(inode)); fscache_wait_on_page_write(cookie, page); @@ -429,9 +331,9 @@ int __nfs_readpage_from_fscache(struct nfs_open_context *ctx, dfprintk(FSCACHE, "NFS: readpage_from_fscache(fsc:%p/p:%p(i:%lx f:%lx)/0x%p)\n", - NFS_I(inode)->fscache, page, page->index, page->flags, inode); + nfs_i_fscache(inode), page, page->index, page->flags, inode); - ret = fscache_read_or_alloc_page(NFS_I(inode)->fscache, + ret = fscache_read_or_alloc_page(nfs_i_fscache(inode), page, nfs_readpage_from_fscache_complete, ctx, @@ -471,9 +373,9 @@ int __nfs_readpages_from_fscache(struct nfs_open_context *ctx, int ret; dfprintk(FSCACHE, "NFS: nfs_getpages_from_fscache (0x%p/%u/0x%p)\n", - NFS_I(inode)->fscache, npages, inode); + nfs_i_fscache(inode), npages, inode); - ret = fscache_read_or_alloc_pages(NFS_I(inode)->fscache, + ret = fscache_read_or_alloc_pages(nfs_i_fscache(inode), mapping, pages, nr_pages, nfs_readpage_from_fscache_complete, ctx, @@ -518,15 +420,15 @@ void __nfs_readpage_to_fscache(struct inode *inode, struct page *page, int sync) dfprintk(FSCACHE, "NFS: readpage_to_fscache(fsc:%p/p:%p(i:%lx f:%lx)/%d)\n", - NFS_I(inode)->fscache, page, page->index, page->flags, sync); + nfs_i_fscache(inode), page, page->index, page->flags, sync); - ret = fscache_write_page(NFS_I(inode)->fscache, page, GFP_KERNEL); + ret = fscache_write_page(nfs_i_fscache(inode), page, GFP_KERNEL); dfprintk(FSCACHE, "NFS: readpage_to_fscache: p:%p(i:%lu f:%lx) ret %d\n", page, page->index, page->flags, ret); if (ret != 0) { - fscache_uncache_page(NFS_I(inode)->fscache, page); + fscache_uncache_page(nfs_i_fscache(inode), page); nfs_add_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL, 1); nfs_add_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_UNCACHED, 1); diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index b9c572d0679..d7fe3e799f2 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -73,16 +73,12 @@ extern void nfs_fscache_unregister(void); extern void nfs_fscache_get_client_cookie(struct nfs_client *); extern void nfs_fscache_release_client_cookie(struct nfs_client *); -extern void nfs_fscache_get_super_cookie(struct super_block *, - const char *, - struct nfs_clone_mount *); +extern void nfs_fscache_get_super_cookie(struct super_block *, const char *, int); extern void nfs_fscache_release_super_cookie(struct super_block *); -extern void nfs_fscache_init_inode_cookie(struct inode *); -extern void nfs_fscache_release_inode_cookie(struct inode *); -extern void nfs_fscache_zap_inode_cookie(struct inode *); -extern void nfs_fscache_set_inode_cookie(struct inode *, struct file *); -extern void nfs_fscache_reset_inode_cookie(struct inode *); +extern void nfs_fscache_init_inode(struct inode *); +extern void nfs_fscache_clear_inode(struct inode *); +extern void nfs_fscache_open_file(struct inode *, struct file *); extern void __nfs_fscache_invalidate_page(struct page *, struct inode *); extern int nfs_fscache_release_page(struct page *, gfp_t); @@ -155,6 +151,22 @@ static inline void nfs_readpage_to_fscache(struct inode *inode, } /* + * Invalidate the contents of fscache for this inode. This will not sleep. + */ +static inline void nfs_fscache_invalidate(struct inode *inode) +{ + fscache_invalidate(NFS_I(inode)->fscache); +} + +/* + * Wait for an object to finish being invalidated. + */ +static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) +{ + fscache_wait_on_invalidate(NFS_I(inode)->fscache); +} + +/* * indicate the client caching state as readable text */ static inline const char *nfs_server_fscache_state(struct nfs_server *server) @@ -164,7 +176,6 @@ static inline const char *nfs_server_fscache_state(struct nfs_server *server) return "no "; } - #else /* CONFIG_NFS_FSCACHE */ static inline int nfs_fscache_register(void) { return 0; } static inline void nfs_fscache_unregister(void) {} @@ -172,20 +183,12 @@ static inline void nfs_fscache_unregister(void) {} static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {} static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {} -static inline void nfs_fscache_get_super_cookie( - struct super_block *sb, - const char *uniq, - struct nfs_clone_mount *mntdata) -{ -} static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {} -static inline void nfs_fscache_init_inode_cookie(struct inode *inode) {} -static inline void nfs_fscache_release_inode_cookie(struct inode *inode) {} -static inline void nfs_fscache_zap_inode_cookie(struct inode *inode) {} -static inline void nfs_fscache_set_inode_cookie(struct inode *inode, - struct file *filp) {} -static inline void nfs_fscache_reset_inode_cookie(struct inode *inode) {} +static inline void nfs_fscache_init_inode(struct inode *inode) {} +static inline void nfs_fscache_clear_inode(struct inode *inode) {} +static inline void nfs_fscache_open_file(struct inode *inode, + struct file *filp) {} static inline int nfs_fscache_release_page(struct page *page, gfp_t gfp) { @@ -213,6 +216,10 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, static inline void nfs_readpage_to_fscache(struct inode *inode, struct page *page, int sync) {} + +static inline void nfs_fscache_invalidate(struct inode *inode) {} +static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) {} + static inline const char *nfs_server_fscache_state(struct nfs_server *server) { return "no "; diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index ac7b814ce16..b94f80420a5 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -23,20 +23,15 @@ #include <linux/sunrpc/stats.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> -#include <linux/nfs4_mount.h> #include <linux/lockd/bind.h> #include <linux/seq_file.h> #include <linux/mount.h> -#include <linux/nfs_idmap.h> #include <linux/vfs.h> #include <linux/namei.h> #include <linux/security.h> -#include <asm/system.h> #include <asm/uaccess.h> -#include "nfs4_fs.h" -#include "delegation.h" #include "internal.h" #define NFSDBG_FACILITY NFSDBG_CLIENT @@ -49,11 +44,9 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i { /* The mntroot acts as the dummy root dentry for this superblock */ if (sb->s_root == NULL) { - sb->s_root = d_alloc_root(inode); - if (sb->s_root == NULL) { - iput(inode); + sb->s_root = d_make_root(inode); + if (sb->s_root == NULL) return -ENOMEM; - } ihold(inode); /* * Ensure that this dentry is invisible to d_find_alias(). @@ -63,9 +56,11 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i * This again causes shrink_dcache_for_umount_subtree() to * Oops, since the test for IS_ROOT() will fail. */ - spin_lock(&dcache_lock); - list_del_init(&sb->s_root->d_alias); - spin_unlock(&dcache_lock); + spin_lock(&sb->s_root->d_inode->i_lock); + spin_lock(&sb->s_root->d_lock); + hlist_del_init(&sb->s_root->d_alias); + spin_unlock(&sb->s_root->d_lock); + spin_unlock(&sb->s_root->d_inode->i_lock); } return 0; } @@ -73,18 +68,25 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i /* * get an NFS2/NFS3 root dentry from the root filehandle */ -struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh) +struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh, + const char *devname) { struct nfs_server *server = NFS_SB(sb); struct nfs_fsinfo fsinfo; struct dentry *ret; struct inode *inode; + void *name = kstrdup(devname, GFP_KERNEL); int error; + if (!name) + return ERR_PTR(-ENOMEM); + /* get the actual root for this mount */ fsinfo.fattr = nfs_alloc_fattr(); - if (fsinfo.fattr == NULL) + if (fsinfo.fattr == NULL) { + kfree(name); return ERR_PTR(-ENOMEM); + } error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo); if (error < 0) { @@ -93,7 +95,7 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh) goto out; } - inode = nfs_fhget(sb, mntfh, fsinfo.fattr); + inode = nfs_fhget(sb, mntfh, fsinfo.fattr, NULL); if (IS_ERR(inode)) { dprintk("nfs_get_root: get root inode failed\n"); ret = ERR_CAST(inode); @@ -117,121 +119,15 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh) } security_d_instantiate(ret, inode); - - if (ret->d_op == NULL) - ret->d_op = server->nfs_client->rpc_ops->dentry_ops; -out: - nfs_free_fattr(fsinfo.fattr); - return ret; -} - -#ifdef CONFIG_NFS_V4 - -int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh) -{ - struct nfs_fsinfo fsinfo; - int ret = -ENOMEM; - - dprintk("--> nfs4_get_rootfh()\n"); - - fsinfo.fattr = nfs_alloc_fattr(); - if (fsinfo.fattr == NULL) - goto out; - - /* Start by getting the root filehandle from the server */ - ret = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo); - if (ret < 0) { - dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret); - goto out; - } - - if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE) - || !S_ISDIR(fsinfo.fattr->mode)) { - printk(KERN_ERR "nfs4_get_rootfh:" - " getroot encountered non-directory\n"); - ret = -ENOTDIR; - goto out; - } - - if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { - printk(KERN_ERR "nfs4_get_rootfh:" - " getroot obtained referral\n"); - ret = -EREMOTE; - goto out; + spin_lock(&ret->d_lock); + if (IS_ROOT(ret) && !ret->d_fsdata && + !(ret->d_flags & DCACHE_NFSFS_RENAMED)) { + ret->d_fsdata = name; + name = NULL; } - - memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid)); + spin_unlock(&ret->d_lock); out: + kfree(name); nfs_free_fattr(fsinfo.fattr); - dprintk("<-- nfs4_get_rootfh() = %d\n", ret); return ret; } - -/* - * get an NFS4 root dentry from the root filehandle - */ -struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh) -{ - struct nfs_server *server = NFS_SB(sb); - struct nfs_fattr *fattr = NULL; - struct dentry *ret; - struct inode *inode; - int error; - - dprintk("--> nfs4_get_root()\n"); - - /* get the info about the server and filesystem */ - error = nfs4_server_capabilities(server, mntfh); - if (error < 0) { - dprintk("nfs_get_root: getcaps error = %d\n", - -error); - return ERR_PTR(error); - } - - fattr = nfs_alloc_fattr(); - if (fattr == NULL) - return ERR_PTR(-ENOMEM);; - - /* get the actual root for this mount */ - error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); - if (error < 0) { - dprintk("nfs_get_root: getattr error = %d\n", -error); - ret = ERR_PTR(error); - goto out; - } - - inode = nfs_fhget(sb, mntfh, fattr); - if (IS_ERR(inode)) { - dprintk("nfs_get_root: get root inode failed\n"); - ret = ERR_CAST(inode); - goto out; - } - - error = nfs_superblock_set_dummy_root(sb, inode); - if (error != 0) { - ret = ERR_PTR(error); - goto out; - } - - /* root dentries normally start off anonymous and get spliced in later - * if the dentry tree reaches them; however if the dentry already - * exists, we'll pick it up at this point and use it as the root - */ - ret = d_obtain_alias(inode); - if (IS_ERR(ret)) { - dprintk("nfs_get_root: get root dentry failed\n"); - goto out; - } - - security_d_instantiate(ret, inode); - - if (ret->d_op == NULL) - ret->d_op = server->nfs_client->rpc_ops->dentry_ops; - -out: - nfs_free_fattr(fattr); - dprintk("<-- nfs4_get_root()\n"); - return ret; -} - -#endif /* CONFIG_NFS_V4 */ diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index 4e2d9b6b138..567983d2c0e 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -33,25 +33,146 @@ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ - -#ifdef CONFIG_NFS_USE_NEW_IDMAPPER - -#include <linux/slab.h> -#include <linux/cred.h> +#include <linux/types.h> +#include <linux/parser.h> +#include <linux/fs.h> #include <linux/nfs_idmap.h> +#include <net/net_namespace.h> +#include <linux/sunrpc/rpc_pipe_fs.h> +#include <linux/nfs_fs.h> +#include <linux/nfs_fs_sb.h> +#include <linux/key.h> #include <linux/keyctl.h> #include <linux/key-type.h> -#include <linux/rcupdate.h> -#include <linux/kernel.h> -#include <linux/err.h> - #include <keys/user-type.h> +#include <linux/module.h> + +#include "internal.h" +#include "netns.h" +#include "nfs4trace.h" #define NFS_UINT_MAXLEN 11 -const struct cred *id_resolver_cache; +static const struct cred *id_resolver_cache; +static struct key_type key_type_id_resolver_legacy; + +struct idmap_legacy_upcalldata { + struct rpc_pipe_msg pipe_msg; + struct idmap_msg idmap_msg; + struct key_construction *key_cons; + struct idmap *idmap; +}; + +struct idmap { + struct rpc_pipe_dir_object idmap_pdo; + struct rpc_pipe *idmap_pipe; + struct idmap_legacy_upcalldata *idmap_upcall_data; + struct mutex idmap_mutex; +}; + +/** + * nfs_fattr_init_names - initialise the nfs_fattr owner_name/group_name fields + * @fattr: fully initialised struct nfs_fattr + * @owner_name: owner name string cache + * @group_name: group name string cache + */ +void nfs_fattr_init_names(struct nfs_fattr *fattr, + struct nfs4_string *owner_name, + struct nfs4_string *group_name) +{ + fattr->owner_name = owner_name; + fattr->group_name = group_name; +} + +static void nfs_fattr_free_owner_name(struct nfs_fattr *fattr) +{ + fattr->valid &= ~NFS_ATTR_FATTR_OWNER_NAME; + kfree(fattr->owner_name->data); +} + +static void nfs_fattr_free_group_name(struct nfs_fattr *fattr) +{ + fattr->valid &= ~NFS_ATTR_FATTR_GROUP_NAME; + kfree(fattr->group_name->data); +} + +static bool nfs_fattr_map_owner_name(struct nfs_server *server, struct nfs_fattr *fattr) +{ + struct nfs4_string *owner = fattr->owner_name; + kuid_t uid; + + if (!(fattr->valid & NFS_ATTR_FATTR_OWNER_NAME)) + return false; + if (nfs_map_name_to_uid(server, owner->data, owner->len, &uid) == 0) { + fattr->uid = uid; + fattr->valid |= NFS_ATTR_FATTR_OWNER; + } + return true; +} + +static bool nfs_fattr_map_group_name(struct nfs_server *server, struct nfs_fattr *fattr) +{ + struct nfs4_string *group = fattr->group_name; + kgid_t gid; + + if (!(fattr->valid & NFS_ATTR_FATTR_GROUP_NAME)) + return false; + if (nfs_map_group_to_gid(server, group->data, group->len, &gid) == 0) { + fattr->gid = gid; + fattr->valid |= NFS_ATTR_FATTR_GROUP; + } + return true; +} + +/** + * nfs_fattr_free_names - free up the NFSv4 owner and group strings + * @fattr: a fully initialised nfs_fattr structure + */ +void nfs_fattr_free_names(struct nfs_fattr *fattr) +{ + if (fattr->valid & NFS_ATTR_FATTR_OWNER_NAME) + nfs_fattr_free_owner_name(fattr); + if (fattr->valid & NFS_ATTR_FATTR_GROUP_NAME) + nfs_fattr_free_group_name(fattr); +} + +/** + * nfs_fattr_map_and_free_names - map owner/group strings into uid/gid and free + * @server: pointer to the filesystem nfs_server structure + * @fattr: a fully initialised nfs_fattr structure + * + * This helper maps the cached NFSv4 owner/group strings in fattr into + * their numeric uid/gid equivalents, and then frees the cached strings. + */ +void nfs_fattr_map_and_free_names(struct nfs_server *server, struct nfs_fattr *fattr) +{ + if (nfs_fattr_map_owner_name(server, fattr)) + nfs_fattr_free_owner_name(fattr); + if (nfs_fattr_map_group_name(server, fattr)) + nfs_fattr_free_group_name(fattr); +} + +static int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res) +{ + unsigned long val; + char buf[16]; + + if (memchr(name, '@', namelen) != NULL || namelen >= sizeof(buf)) + return 0; + memcpy(buf, name, namelen); + buf[namelen] = '\0'; + if (kstrtoul(buf, 0, &val) != 0) + return 0; + *res = val; + return 1; +} + +static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen) +{ + return snprintf(buf, buflen, "%u", id); +} -struct key_type key_type_id_resolver = { +static struct key_type key_type_id_resolver = { .name = "id_resolver", .instantiate = user_instantiate, .match = user_match, @@ -61,40 +182,45 @@ struct key_type key_type_id_resolver = { .read = user_read, }; -int nfs_idmap_init(void) +static int nfs_idmap_init_keyring(void) { struct cred *cred; struct key *keyring; int ret = 0; - printk(KERN_NOTICE "Registering the %s key type\n", key_type_id_resolver.name); + printk(KERN_NOTICE "NFS: Registering the %s key type\n", + key_type_id_resolver.name); cred = prepare_kernel_cred(NULL); if (!cred) return -ENOMEM; - keyring = key_alloc(&key_type_keyring, ".id_resolver", 0, 0, cred, - (KEY_POS_ALL & ~KEY_POS_SETATTR) | - KEY_USR_VIEW | KEY_USR_READ, - KEY_ALLOC_NOT_IN_QUOTA); + keyring = keyring_alloc(".id_resolver", + GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred, + (KEY_POS_ALL & ~KEY_POS_SETATTR) | + KEY_USR_VIEW | KEY_USR_READ, + KEY_ALLOC_NOT_IN_QUOTA, NULL); if (IS_ERR(keyring)) { ret = PTR_ERR(keyring); goto failed_put_cred; } - ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL); + ret = register_key_type(&key_type_id_resolver); if (ret < 0) goto failed_put_key; - ret = register_key_type(&key_type_id_resolver); + ret = register_key_type(&key_type_id_resolver_legacy); if (ret < 0) - goto failed_put_key; + goto failed_reg_legacy; + set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags); cred->thread_keyring = keyring; cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING; id_resolver_cache = cred; return 0; +failed_reg_legacy: + unregister_key_type(&key_type_id_resolver); failed_put_key: key_put(keyring); failed_put_cred: @@ -102,10 +228,11 @@ failed_put_cred: return ret; } -void nfs_idmap_quit(void) +static void nfs_idmap_quit_keyring(void) { key_revoke(id_resolver_cache->thread_keyring); unregister_key_type(&key_type_id_resolver); + unregister_key_type(&key_type_id_resolver_legacy); put_cred(id_resolver_cache); } @@ -137,23 +264,42 @@ static ssize_t nfs_idmap_get_desc(const char *name, size_t namelen, return desclen; } -static ssize_t nfs_idmap_request_key(const char *name, size_t namelen, - const char *type, void *data, size_t data_size) +static struct key *nfs_idmap_request_key(const char *name, size_t namelen, + const char *type, struct idmap *idmap) { - const struct cred *saved_cred; - struct key *rkey; char *desc; - struct user_key_payload *payload; + struct key *rkey; ssize_t ret; ret = nfs_idmap_get_desc(name, namelen, type, strlen(type), &desc); if (ret <= 0) - goto out; + return ERR_PTR(ret); - saved_cred = override_creds(id_resolver_cache); rkey = request_key(&key_type_id_resolver, desc, ""); - revert_creds(saved_cred); + if (IS_ERR(rkey)) { + mutex_lock(&idmap->idmap_mutex); + rkey = request_key_with_auxdata(&key_type_id_resolver_legacy, + desc, "", 0, idmap); + mutex_unlock(&idmap->idmap_mutex); + } + kfree(desc); + return rkey; +} + +static ssize_t nfs_idmap_get_key(const char *name, size_t namelen, + const char *type, void *data, + size_t data_size, struct idmap *idmap) +{ + const struct cred *saved_cred; + struct key *rkey; + struct user_key_payload *payload; + ssize_t ret; + + saved_cred = override_creds(id_resolver_cache); + rkey = nfs_idmap_request_key(name, namelen, type, idmap); + revert_creds(saved_cred); + if (IS_ERR(rkey)) { ret = PTR_ERR(rkey); goto out; @@ -166,7 +312,7 @@ static ssize_t nfs_idmap_request_key(const char *name, size_t namelen, if (ret < 0) goto out_up; - payload = rcu_dereference(rkey->payload.data); + payload = rcu_dereference(rkey->payload.rcudata); if (IS_ERR_OR_NULL(payload)) { ret = PTR_ERR(payload); goto out_up; @@ -185,162 +331,145 @@ out: return ret; } - /* ID -> Name */ -static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf, size_t buflen) +static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf, + size_t buflen, struct idmap *idmap) { char id_str[NFS_UINT_MAXLEN]; int id_len; ssize_t ret; id_len = snprintf(id_str, sizeof(id_str), "%u", id); - ret = nfs_idmap_request_key(id_str, id_len, type, buf, buflen); + ret = nfs_idmap_get_key(id_str, id_len, type, buf, buflen, idmap); if (ret < 0) return -EINVAL; return ret; } /* Name -> ID */ -static int nfs_idmap_lookup_id(const char *name, size_t namelen, - const char *type, __u32 *id) +static int nfs_idmap_lookup_id(const char *name, size_t namelen, const char *type, + __u32 *id, struct idmap *idmap) { char id_str[NFS_UINT_MAXLEN]; long id_long; ssize_t data_size; int ret = 0; - data_size = nfs_idmap_request_key(name, namelen, type, id_str, NFS_UINT_MAXLEN); + data_size = nfs_idmap_get_key(name, namelen, type, id_str, NFS_UINT_MAXLEN, idmap); if (data_size <= 0) { ret = -EINVAL; } else { - ret = strict_strtol(id_str, 10, &id_long); + ret = kstrtol(id_str, 10, &id_long); *id = (__u32)id_long; } return ret; } -int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid) -{ - return nfs_idmap_lookup_id(name, namelen, "uid", uid); -} - -int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *gid) -{ - return nfs_idmap_lookup_id(name, namelen, "gid", gid); -} - -int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen) -{ - return nfs_idmap_lookup_name(uid, "user", buf, buflen); -} -int nfs_map_gid_to_group(struct nfs_client *clp, __u32 gid, char *buf, size_t buflen) -{ - return nfs_idmap_lookup_name(gid, "group", buf, buflen); -} - -#else /* CONFIG_NFS_USE_IDMAPPER not defined */ - -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/socket.h> -#include <linux/in.h> -#include <linux/sched.h> - -#include <linux/sunrpc/clnt.h> -#include <linux/workqueue.h> -#include <linux/sunrpc/rpc_pipe_fs.h> - -#include <linux/nfs_fs.h> +/* idmap classic begins here */ -#include <linux/nfs_idmap.h> -#include "nfs4_fs.h" - -#define IDMAP_HASH_SZ 128 - -/* Default cache timeout is 10 minutes */ -unsigned int nfs_idmap_cache_timeout = 600 * HZ; - -static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) -{ - char *endp; - int num = simple_strtol(val, &endp, 0); - int jif = num * HZ; - if (endp == val || *endp || num < 0 || jif < num) - return -EINVAL; - *((int *)kp->arg) = jif; - return 0; -} - -module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, - &nfs_idmap_cache_timeout, 0644); - -struct idmap_hashent { - unsigned long ih_expires; - __u32 ih_id; - size_t ih_namelen; - char ih_name[IDMAP_NAMESZ]; +enum { + Opt_find_uid, Opt_find_gid, Opt_find_user, Opt_find_group, Opt_find_err }; -struct idmap_hashtable { - __u8 h_type; - struct idmap_hashent h_entries[IDMAP_HASH_SZ]; +static const match_table_t nfs_idmap_tokens = { + { Opt_find_uid, "uid:%s" }, + { Opt_find_gid, "gid:%s" }, + { Opt_find_user, "user:%s" }, + { Opt_find_group, "group:%s" }, + { Opt_find_err, NULL } }; -struct idmap { - struct dentry *idmap_dentry; - wait_queue_head_t idmap_wq; - struct idmap_msg idmap_im; - struct mutex idmap_lock; /* Serializes upcalls */ - struct mutex idmap_im_lock; /* Protects the hashtable */ - struct idmap_hashtable idmap_user_hash; - struct idmap_hashtable idmap_group_hash; -}; - -static ssize_t idmap_pipe_upcall(struct file *, struct rpc_pipe_msg *, - char __user *, size_t); +static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *); static ssize_t idmap_pipe_downcall(struct file *, const char __user *, size_t); +static void idmap_release_pipe(struct inode *); static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *); -static unsigned int fnvhash32(const void *, size_t); - static const struct rpc_pipe_ops idmap_upcall_ops = { - .upcall = idmap_pipe_upcall, + .upcall = rpc_pipe_generic_upcall, .downcall = idmap_pipe_downcall, + .release_pipe = idmap_release_pipe, .destroy_msg = idmap_pipe_destroy_msg, }; +static struct key_type key_type_id_resolver_legacy = { + .name = "id_legacy", + .instantiate = user_instantiate, + .match = user_match, + .revoke = user_revoke, + .destroy = user_destroy, + .describe = user_describe, + .read = user_read, + .request_key = nfs_idmap_legacy_upcall, +}; + +static void nfs_idmap_pipe_destroy(struct dentry *dir, + struct rpc_pipe_dir_object *pdo) +{ + struct idmap *idmap = pdo->pdo_data; + struct rpc_pipe *pipe = idmap->idmap_pipe; + + if (pipe->dentry) { + rpc_unlink(pipe->dentry); + pipe->dentry = NULL; + } +} + +static int nfs_idmap_pipe_create(struct dentry *dir, + struct rpc_pipe_dir_object *pdo) +{ + struct idmap *idmap = pdo->pdo_data; + struct rpc_pipe *pipe = idmap->idmap_pipe; + struct dentry *dentry; + + dentry = rpc_mkpipe_dentry(dir, "idmap", idmap, pipe); + if (IS_ERR(dentry)) + return PTR_ERR(dentry); + pipe->dentry = dentry; + return 0; +} + +static const struct rpc_pipe_dir_object_ops nfs_idmap_pipe_dir_object_ops = { + .create = nfs_idmap_pipe_create, + .destroy = nfs_idmap_pipe_destroy, +}; + int nfs_idmap_new(struct nfs_client *clp) { struct idmap *idmap; + struct rpc_pipe *pipe; int error; - BUG_ON(clp->cl_idmap != NULL); - idmap = kzalloc(sizeof(*idmap), GFP_KERNEL); if (idmap == NULL) return -ENOMEM; - idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_path.dentry, - "idmap", idmap, &idmap_upcall_ops, 0); - if (IS_ERR(idmap->idmap_dentry)) { - error = PTR_ERR(idmap->idmap_dentry); - kfree(idmap); - return error; + rpc_init_pipe_dir_object(&idmap->idmap_pdo, + &nfs_idmap_pipe_dir_object_ops, + idmap); + + pipe = rpc_mkpipe_data(&idmap_upcall_ops, 0); + if (IS_ERR(pipe)) { + error = PTR_ERR(pipe); + goto err; } + idmap->idmap_pipe = pipe; + mutex_init(&idmap->idmap_mutex); - mutex_init(&idmap->idmap_lock); - mutex_init(&idmap->idmap_im_lock); - init_waitqueue_head(&idmap->idmap_wq); - idmap->idmap_user_hash.h_type = IDMAP_TYPE_USER; - idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP; + error = rpc_add_pipe_dir_object(clp->cl_net, + &clp->cl_rpcclient->cl_pipedir_objects, + &idmap->idmap_pdo); + if (error) + goto err_destroy_pipe; clp->cl_idmap = idmap; return 0; +err_destroy_pipe: + rpc_destroy_pipe_data(idmap->idmap_pipe); +err: + kfree(idmap); + return error; } void @@ -350,376 +479,309 @@ nfs_idmap_delete(struct nfs_client *clp) if (!idmap) return; - rpc_unlink(idmap->idmap_dentry); clp->cl_idmap = NULL; + rpc_remove_pipe_dir_object(clp->cl_net, + &clp->cl_rpcclient->cl_pipedir_objects, + &idmap->idmap_pdo); + rpc_destroy_pipe_data(idmap->idmap_pipe); kfree(idmap); } -/* - * Helper routines for manipulating the hashtable - */ -static inline struct idmap_hashent * -idmap_name_hash(struct idmap_hashtable* h, const char *name, size_t len) +int nfs_idmap_init(void) { - return &h->h_entries[fnvhash32(name, len) % IDMAP_HASH_SZ]; + int ret; + ret = nfs_idmap_init_keyring(); + if (ret != 0) + goto out; +out: + return ret; } -static struct idmap_hashent * -idmap_lookup_name(struct idmap_hashtable *h, const char *name, size_t len) +void nfs_idmap_quit(void) { - struct idmap_hashent *he = idmap_name_hash(h, name, len); - - if (he->ih_namelen != len || memcmp(he->ih_name, name, len) != 0) - return NULL; - if (time_after(jiffies, he->ih_expires)) - return NULL; - return he; + nfs_idmap_quit_keyring(); } -static inline struct idmap_hashent * -idmap_id_hash(struct idmap_hashtable* h, __u32 id) +static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap, + struct idmap_msg *im, + struct rpc_pipe_msg *msg) { - return &h->h_entries[fnvhash32(&id, sizeof(id)) % IDMAP_HASH_SZ]; -} + substring_t substr; + int token, ret; + + im->im_type = IDMAP_TYPE_GROUP; + token = match_token(desc, nfs_idmap_tokens, &substr); + + switch (token) { + case Opt_find_uid: + im->im_type = IDMAP_TYPE_USER; + case Opt_find_gid: + im->im_conv = IDMAP_CONV_NAMETOID; + ret = match_strlcpy(im->im_name, &substr, IDMAP_NAMESZ); + break; -static struct idmap_hashent * -idmap_lookup_id(struct idmap_hashtable *h, __u32 id) -{ - struct idmap_hashent *he = idmap_id_hash(h, id); - if (he->ih_id != id || he->ih_namelen == 0) - return NULL; - if (time_after(jiffies, he->ih_expires)) - return NULL; - return he; + case Opt_find_user: + im->im_type = IDMAP_TYPE_USER; + case Opt_find_group: + im->im_conv = IDMAP_CONV_IDTONAME; + ret = match_int(&substr, &im->im_id); + break; + + default: + ret = -EINVAL; + goto out; + } + + msg->data = im; + msg->len = sizeof(struct idmap_msg); + +out: + return ret; } -/* - * Routines for allocating new entries in the hashtable. - * For now, we just have 1 entry per bucket, so it's all - * pretty trivial. - */ -static inline struct idmap_hashent * -idmap_alloc_name(struct idmap_hashtable *h, char *name, size_t len) +static bool +nfs_idmap_prepare_pipe_upcall(struct idmap *idmap, + struct idmap_legacy_upcalldata *data) { - return idmap_name_hash(h, name, len); + if (idmap->idmap_upcall_data != NULL) { + WARN_ON_ONCE(1); + return false; + } + idmap->idmap_upcall_data = data; + return true; } -static inline struct idmap_hashent * -idmap_alloc_id(struct idmap_hashtable *h, __u32 id) +static void +nfs_idmap_complete_pipe_upcall_locked(struct idmap *idmap, int ret) { - return idmap_id_hash(h, id); + struct key_construction *cons = idmap->idmap_upcall_data->key_cons; + + kfree(idmap->idmap_upcall_data); + idmap->idmap_upcall_data = NULL; + complete_request_key(cons, ret); } static void -idmap_update_entry(struct idmap_hashent *he, const char *name, - size_t namelen, __u32 id) +nfs_idmap_abort_pipe_upcall(struct idmap *idmap, int ret) { - he->ih_id = id; - memcpy(he->ih_name, name, namelen); - he->ih_name[namelen] = '\0'; - he->ih_namelen = namelen; - he->ih_expires = jiffies + nfs_idmap_cache_timeout; + if (idmap->idmap_upcall_data != NULL) + nfs_idmap_complete_pipe_upcall_locked(idmap, ret); } -/* - * Name -> ID - */ -static int -nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h, - const char *name, size_t namelen, __u32 *id) +static int nfs_idmap_legacy_upcall(struct key_construction *cons, + const char *op, + void *aux) { - struct rpc_pipe_msg msg; + struct idmap_legacy_upcalldata *data; + struct rpc_pipe_msg *msg; struct idmap_msg *im; - struct idmap_hashent *he; - DECLARE_WAITQUEUE(wq, current); - int ret = -EIO; - - im = &idmap->idmap_im; - - /* - * String sanity checks - * Note that the userland daemon expects NUL terminated strings - */ - for (;;) { - if (namelen == 0) - return -EINVAL; - if (name[namelen-1] != '\0') - break; - namelen--; - } - if (namelen >= IDMAP_NAMESZ) - return -EINVAL; - - mutex_lock(&idmap->idmap_lock); - mutex_lock(&idmap->idmap_im_lock); - - he = idmap_lookup_name(h, name, namelen); - if (he != NULL) { - *id = he->ih_id; - ret = 0; - goto out; - } - - memset(im, 0, sizeof(*im)); - memcpy(im->im_name, name, namelen); + struct idmap *idmap = (struct idmap *)aux; + struct key *key = cons->key; + int ret = -ENOMEM; - im->im_type = h->h_type; - im->im_conv = IDMAP_CONV_NAMETOID; + /* msg and im are freed in idmap_pipe_destroy_msg */ + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + goto out1; - memset(&msg, 0, sizeof(msg)); - msg.data = im; - msg.len = sizeof(*im); + msg = &data->pipe_msg; + im = &data->idmap_msg; + data->idmap = idmap; + data->key_cons = cons; - add_wait_queue(&idmap->idmap_wq, &wq); - if (rpc_queue_upcall(idmap->idmap_dentry->d_inode, &msg) < 0) { - remove_wait_queue(&idmap->idmap_wq, &wq); - goto out; - } + ret = nfs_idmap_prepare_message(key->description, idmap, im, msg); + if (ret < 0) + goto out2; - set_current_state(TASK_UNINTERRUPTIBLE); - mutex_unlock(&idmap->idmap_im_lock); - schedule(); - __set_current_state(TASK_RUNNING); - remove_wait_queue(&idmap->idmap_wq, &wq); - mutex_lock(&idmap->idmap_im_lock); + ret = -EAGAIN; + if (!nfs_idmap_prepare_pipe_upcall(idmap, data)) + goto out2; - if (im->im_status & IDMAP_STATUS_SUCCESS) { - *id = im->im_id; - ret = 0; - } + ret = rpc_queue_upcall(idmap->idmap_pipe, msg); + if (ret < 0) + nfs_idmap_abort_pipe_upcall(idmap, ret); - out: - memset(im, 0, sizeof(*im)); - mutex_unlock(&idmap->idmap_im_lock); - mutex_unlock(&idmap->idmap_lock); + return ret; +out2: + kfree(data); +out1: + complete_request_key(cons, ret); return ret; } -/* - * ID -> Name - */ -static int -nfs_idmap_name(struct idmap *idmap, struct idmap_hashtable *h, - __u32 id, char *name) +static int nfs_idmap_instantiate(struct key *key, struct key *authkey, char *data, size_t datalen) { - struct rpc_pipe_msg msg; - struct idmap_msg *im; - struct idmap_hashent *he; - DECLARE_WAITQUEUE(wq, current); - int ret = -EIO; - unsigned int len; - - im = &idmap->idmap_im; - - mutex_lock(&idmap->idmap_lock); - mutex_lock(&idmap->idmap_im_lock); - - he = idmap_lookup_id(h, id); - if (he) { - memcpy(name, he->ih_name, he->ih_namelen); - ret = he->ih_namelen; - goto out; - } - - memset(im, 0, sizeof(*im)); - im->im_type = h->h_type; - im->im_conv = IDMAP_CONV_IDTONAME; - im->im_id = id; - - memset(&msg, 0, sizeof(msg)); - msg.data = im; - msg.len = sizeof(*im); - - add_wait_queue(&idmap->idmap_wq, &wq); - - if (rpc_queue_upcall(idmap->idmap_dentry->d_inode, &msg) < 0) { - remove_wait_queue(&idmap->idmap_wq, &wq); - goto out; - } - - set_current_state(TASK_UNINTERRUPTIBLE); - mutex_unlock(&idmap->idmap_im_lock); - schedule(); - __set_current_state(TASK_RUNNING); - remove_wait_queue(&idmap->idmap_wq, &wq); - mutex_lock(&idmap->idmap_im_lock); - - if (im->im_status & IDMAP_STATUS_SUCCESS) { - if ((len = strnlen(im->im_name, IDMAP_NAMESZ)) == 0) - goto out; - memcpy(name, im->im_name, len); - ret = len; - } - - out: - memset(im, 0, sizeof(*im)); - mutex_unlock(&idmap->idmap_im_lock); - mutex_unlock(&idmap->idmap_lock); - return ret; + return key_instantiate_and_link(key, data, datalen, + id_resolver_cache->thread_keyring, + authkey); } -/* RPC pipefs upcall/downcall routines */ -static ssize_t -idmap_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg, - char __user *dst, size_t buflen) +static int nfs_idmap_read_and_verify_message(struct idmap_msg *im, + struct idmap_msg *upcall, + struct key *key, struct key *authkey) { - char *data = (char *)msg->data + msg->copied; - size_t mlen = min(msg->len, buflen); - unsigned long left; + char id_str[NFS_UINT_MAXLEN]; + size_t len; + int ret = -ENOKEY; - left = copy_to_user(dst, data, mlen); - if (left == mlen) { - msg->errno = -EFAULT; - return -EFAULT; + /* ret = -ENOKEY */ + if (upcall->im_type != im->im_type || upcall->im_conv != im->im_conv) + goto out; + switch (im->im_conv) { + case IDMAP_CONV_NAMETOID: + if (strcmp(upcall->im_name, im->im_name) != 0) + break; + /* Note: here we store the NUL terminator too */ + len = sprintf(id_str, "%d", im->im_id) + 1; + ret = nfs_idmap_instantiate(key, authkey, id_str, len); + break; + case IDMAP_CONV_IDTONAME: + if (upcall->im_id != im->im_id) + break; + len = strlen(im->im_name); + ret = nfs_idmap_instantiate(key, authkey, im->im_name, len); + break; + default: + ret = -EINVAL; } - - mlen -= left; - msg->copied += mlen; - msg->errno = 0; - return mlen; +out: + return ret; } static ssize_t idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) { - struct rpc_inode *rpci = RPC_I(filp->f_path.dentry->d_inode); + struct rpc_inode *rpci = RPC_I(file_inode(filp)); struct idmap *idmap = (struct idmap *)rpci->private; - struct idmap_msg im_in, *im = &idmap->idmap_im; - struct idmap_hashtable *h; - struct idmap_hashent *he = NULL; + struct key_construction *cons; + struct idmap_msg im; size_t namelen_in; - int ret; + int ret = -ENOKEY; - if (mlen != sizeof(im_in)) - return -ENOSPC; - - if (copy_from_user(&im_in, src, mlen) != 0) - return -EFAULT; + /* If instantiation is successful, anyone waiting for key construction + * will have been woken up and someone else may now have used + * idmap_key_cons - so after this point we may no longer touch it. + */ + if (idmap->idmap_upcall_data == NULL) + goto out_noupcall; - mutex_lock(&idmap->idmap_im_lock); + cons = idmap->idmap_upcall_data->key_cons; - ret = mlen; - im->im_status = im_in.im_status; - /* If we got an error, terminate now, and wake up pending upcalls */ - if (!(im_in.im_status & IDMAP_STATUS_SUCCESS)) { - wake_up(&idmap->idmap_wq); + if (mlen != sizeof(im)) { + ret = -ENOSPC; goto out; } - /* Sanity checking of strings */ - ret = -EINVAL; - namelen_in = strnlen(im_in.im_name, IDMAP_NAMESZ); - if (namelen_in == 0 || namelen_in == IDMAP_NAMESZ) + if (copy_from_user(&im, src, mlen) != 0) { + ret = -EFAULT; goto out; + } - switch (im_in.im_type) { - case IDMAP_TYPE_USER: - h = &idmap->idmap_user_hash; - break; - case IDMAP_TYPE_GROUP: - h = &idmap->idmap_group_hash; - break; - default: - goto out; + if (!(im.im_status & IDMAP_STATUS_SUCCESS)) { + ret = -ENOKEY; + goto out; } - switch (im_in.im_conv) { - case IDMAP_CONV_IDTONAME: - /* Did we match the current upcall? */ - if (im->im_conv == IDMAP_CONV_IDTONAME - && im->im_type == im_in.im_type - && im->im_id == im_in.im_id) { - /* Yes: copy string, including the terminating '\0' */ - memcpy(im->im_name, im_in.im_name, namelen_in); - im->im_name[namelen_in] = '\0'; - wake_up(&idmap->idmap_wq); - } - he = idmap_alloc_id(h, im_in.im_id); - break; - case IDMAP_CONV_NAMETOID: - /* Did we match the current upcall? */ - if (im->im_conv == IDMAP_CONV_NAMETOID - && im->im_type == im_in.im_type - && strnlen(im->im_name, IDMAP_NAMESZ) == namelen_in - && memcmp(im->im_name, im_in.im_name, namelen_in) == 0) { - im->im_id = im_in.im_id; - wake_up(&idmap->idmap_wq); - } - he = idmap_alloc_name(h, im_in.im_name, namelen_in); - break; - default: + namelen_in = strnlen(im.im_name, IDMAP_NAMESZ); + if (namelen_in == 0 || namelen_in == IDMAP_NAMESZ) { + ret = -EINVAL; goto out; +} + + ret = nfs_idmap_read_and_verify_message(&im, + &idmap->idmap_upcall_data->idmap_msg, + cons->key, cons->authkey); + if (ret >= 0) { + key_set_timeout(cons->key, nfs_idmap_cache_timeout); + ret = mlen; } - /* If the entry is valid, also copy it to the cache */ - if (he != NULL) - idmap_update_entry(he, im_in.im_name, namelen_in, im_in.im_id); - ret = mlen; out: - mutex_unlock(&idmap->idmap_im_lock); + nfs_idmap_complete_pipe_upcall_locked(idmap, ret); +out_noupcall: return ret; } static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg) { - struct idmap_msg *im = msg->data; - struct idmap *idmap = container_of(im, struct idmap, idmap_im); + struct idmap_legacy_upcalldata *data = container_of(msg, + struct idmap_legacy_upcalldata, + pipe_msg); + struct idmap *idmap = data->idmap; - if (msg->errno >= 0) - return; - mutex_lock(&idmap->idmap_im_lock); - im->im_status = IDMAP_STATUS_LOOKUPFAIL; - wake_up(&idmap->idmap_wq); - mutex_unlock(&idmap->idmap_im_lock); + if (msg->errno) + nfs_idmap_abort_pipe_upcall(idmap, msg->errno); } -/* - * Fowler/Noll/Vo hash - * http://www.isthe.com/chongo/tech/comp/fnv/ - */ - -#define FNV_P_32 ((unsigned int)0x01000193) /* 16777619 */ -#define FNV_1_32 ((unsigned int)0x811c9dc5) /* 2166136261 */ - -static unsigned int fnvhash32(const void *buf, size_t buflen) +static void +idmap_release_pipe(struct inode *inode) { - const unsigned char *p, *end = (const unsigned char *)buf + buflen; - unsigned int hash = FNV_1_32; - - for (p = buf; p < end; p++) { - hash *= FNV_P_32; - hash ^= (unsigned int)*p; - } + struct rpc_inode *rpci = RPC_I(inode); + struct idmap *idmap = (struct idmap *)rpci->private; - return hash; + nfs_idmap_abort_pipe_upcall(idmap, -EPIPE); } -int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid) +int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, kuid_t *uid) { - struct idmap *idmap = clp->cl_idmap; + struct idmap *idmap = server->nfs_client->cl_idmap; + __u32 id = -1; + int ret = 0; - return nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid); + if (!nfs_map_string_to_numeric(name, namelen, &id)) + ret = nfs_idmap_lookup_id(name, namelen, "uid", &id, idmap); + if (ret == 0) { + *uid = make_kuid(&init_user_ns, id); + if (!uid_valid(*uid)) + ret = -ERANGE; + } + trace_nfs4_map_name_to_uid(name, namelen, id, ret); + return ret; } -int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid) +int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size_t namelen, kgid_t *gid) { - struct idmap *idmap = clp->cl_idmap; + struct idmap *idmap = server->nfs_client->cl_idmap; + __u32 id = -1; + int ret = 0; - return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid); + if (!nfs_map_string_to_numeric(name, namelen, &id)) + ret = nfs_idmap_lookup_id(name, namelen, "gid", &id, idmap); + if (ret == 0) { + *gid = make_kgid(&init_user_ns, id); + if (!gid_valid(*gid)) + ret = -ERANGE; + } + trace_nfs4_map_group_to_gid(name, namelen, id, ret); + return ret; } -int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen) +int nfs_map_uid_to_name(const struct nfs_server *server, kuid_t uid, char *buf, size_t buflen) { - struct idmap *idmap = clp->cl_idmap; + struct idmap *idmap = server->nfs_client->cl_idmap; + int ret = -EINVAL; + __u32 id; - return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf); + id = from_kuid(&init_user_ns, uid); + if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) + ret = nfs_idmap_lookup_name(id, "user", buf, buflen, idmap); + if (ret < 0) + ret = nfs_map_numeric_to_string(id, buf, buflen); + trace_nfs4_map_uid_to_name(buf, ret, id, ret); + return ret; } -int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen) +int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf, size_t buflen) { - struct idmap *idmap = clp->cl_idmap; + struct idmap *idmap = server->nfs_client->cl_idmap; + int ret = -EINVAL; + __u32 id; - return nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf); + id = from_kgid(&init_user_ns, gid); + if (!(server->caps & NFS_CAP_UIDGID_NOMAP)) + ret = nfs_idmap_lookup_name(id, "group", buf, buflen, idmap); + if (ret < 0) + ret = nfs_map_numeric_to_string(id, buf, buflen); + trace_nfs4_map_gid_to_group(buf, ret, id, ret); + return ret; } - -#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */ diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 314f5716460..9927913c97c 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -32,13 +32,13 @@ #include <linux/lockd/bind.h> #include <linux/seq_file.h> #include <linux/mount.h> -#include <linux/nfs_idmap.h> #include <linux/vfs.h> #include <linux/inet.h> #include <linux/nfs_xdr.h> #include <linux/slab.h> +#include <linux/compat.h> +#include <linux/freezer.h> -#include <asm/system.h> #include <asm/uaccess.h> #include "nfs4_fs.h" @@ -47,15 +47,18 @@ #include "iostat.h" #include "internal.h" #include "fscache.h" -#include "dns_resolve.h" #include "pnfs.h" +#include "nfs.h" +#include "netns.h" + +#include "nfstrace.h" #define NFSDBG_FACILITY NFSDBG_VFS #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 /* Default is to see 64-bit inode numbers */ -static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; +static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; static void nfs_invalidate_inode(struct inode *); static int nfs_update_inode(struct inode *, struct nfs_fattr *); @@ -76,9 +79,10 @@ int nfs_wait_bit_killable(void *word) { if (fatal_signal_pending(current)) return -ERESTARTSYS; - schedule(); + freezable_schedule_unsafe(); return 0; } +EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); /** * nfs_compat_user_ino64 - returns the user-visible inode number @@ -89,7 +93,11 @@ int nfs_wait_bit_killable(void *word) */ u64 nfs_compat_user_ino64(u64 fileid) { - int ino; +#ifdef CONFIG_COMPAT + compat_ulong_t ino; +#else + unsigned long ino; +#endif if (enable_ino64) return fileid; @@ -99,22 +107,29 @@ u64 nfs_compat_user_ino64(u64 fileid) return ino; } -static void nfs_clear_inode(struct inode *inode) +int nfs_drop_inode(struct inode *inode) +{ + return NFS_STALE(inode) || generic_drop_inode(inode); +} +EXPORT_SYMBOL_GPL(nfs_drop_inode); + +void nfs_clear_inode(struct inode *inode) { /* * The following should never happen... */ - BUG_ON(nfs_have_writebacks(inode)); - BUG_ON(!list_empty(&NFS_I(inode)->open_files)); + WARN_ON_ONCE(nfs_have_writebacks(inode)); + WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); nfs_zap_acl_cache(inode); nfs_access_zap_cache(inode); - nfs_fscache_release_inode_cookie(inode); + nfs_fscache_clear_inode(inode); } +EXPORT_SYMBOL_GPL(nfs_clear_inode); void nfs_evict_inode(struct inode *inode) { - truncate_inode_pages(&inode->i_data, 0); - end_writeback(inode); + truncate_inode_pages_final(&inode->i_data); + clear_inode(inode); nfs_clear_inode(inode); } @@ -132,6 +147,17 @@ int nfs_sync_mapping(struct address_space *mapping) return ret; } +static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) +{ + struct nfs_inode *nfsi = NFS_I(inode); + + if (inode->i_mapping->nrpages == 0) + flags &= ~NFS_INO_INVALID_DATA; + nfsi->cache_validity |= flags; + if (flags & NFS_INO_INVALID_DATA) + nfs_fscache_invalidate(inode); +} + /* * Invalidate the local caches */ @@ -145,11 +171,19 @@ static void nfs_zap_caches_locked(struct inode *inode) nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = jiffies; - memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); - if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; - else - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; + memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); + if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR + | NFS_INO_INVALID_DATA + | NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL + | NFS_INO_REVAL_PAGECACHE); + } else + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR + | NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL + | NFS_INO_REVAL_PAGECACHE); + nfs_zap_label_cache_locked(nfsi); } void nfs_zap_caches(struct inode *inode) @@ -163,7 +197,7 @@ void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) { if (mapping->nrpages != 0) { spin_lock(&inode->i_lock); - NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); spin_unlock(&inode->i_lock); } } @@ -179,13 +213,15 @@ void nfs_zap_acl_cache(struct inode *inode) NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); void nfs_invalidate_atime(struct inode *inode) { spin_lock(&inode->i_lock); - NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL_GPL(nfs_invalidate_atime); /* * Invalidate, but do not unhash, the inode. @@ -217,6 +253,8 @@ nfs_find_actor(struct inode *inode, void *opaque) if (NFS_FILEID(inode) != fattr->fileid) return 0; + if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) + return 0; if (nfs_compare_fh(NFS_FH(inode), fh)) return 0; if (is_bad_inode(inode) || NFS_STALE(inode)) @@ -235,12 +273,74 @@ nfs_init_locked(struct inode *inode, void *opaque) return 0; } +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static void nfs_clear_label_invalid(struct inode *inode) +{ + spin_lock(&inode->i_lock); + NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; + spin_unlock(&inode->i_lock); +} + +void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, + struct nfs4_label *label) +{ + int error; + + if (label == NULL) + return; + + if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { + error = security_inode_notifysecctx(inode, label->label, + label->len); + if (error) + printk(KERN_ERR "%s() %s %d " + "security_inode_notifysecctx() %d\n", + __func__, + (char *)label->label, + label->len, error); + nfs_clear_label_invalid(inode); + } +} + +struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) +{ + struct nfs4_label *label = NULL; + int minor_version = server->nfs_client->cl_minorversion; + + if (minor_version < 2) + return label; + + if (!(server->caps & NFS_CAP_SECURITY_LABEL)) + return label; + + label = kzalloc(sizeof(struct nfs4_label), flags); + if (label == NULL) + return ERR_PTR(-ENOMEM); + + label->label = kzalloc(NFS4_MAXLABELLEN, flags); + if (label->label == NULL) { + kfree(label); + return ERR_PTR(-ENOMEM); + } + label->len = NFS4_MAXLABELLEN; + + return label; +} +EXPORT_SYMBOL_GPL(nfs4_label_alloc); +#else +void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, + struct nfs4_label *label) +{ +} +#endif +EXPORT_SYMBOL_GPL(nfs_setsecurity); + /* * This is our front-end to iget that looks up inodes by file handle * instead of inode number. */ struct inode * -nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) +nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs_find_desc desc = { .fh = fh, @@ -249,7 +349,10 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) struct inode *inode = ERR_PTR(-ENOENT); unsigned long hash; - if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) + nfs_attr_check_mountpoint(sb, fattr); + + if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && + !nfs_attr_use_mounted_on_fileid(fattr)) goto out_no_inode; if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) goto out_no_inode; @@ -275,31 +378,28 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) inode->i_mode = fattr->mode; if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 && nfs_server_capable(inode, NFS_CAP_MODE)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); /* Why so? Because we want revalidate for devices/FIFOs, and * that's precisely what we have in nfs_file_inode_operations. */ inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; if (S_ISREG(inode->i_mode)) { - inode->i_fop = &nfs_file_operations; + inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; inode->i_data.a_ops = &nfs_file_aops; inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; } else if (S_ISDIR(inode->i_mode)) { inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; inode->i_fop = &nfs_dir_operations; - if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) - set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); + inode->i_data.a_ops = &nfs_dir_aops; /* Deal with crossing mountpoints */ - if ((fattr->valid & NFS_ATTR_FATTR_FSID) - && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { + if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || + fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) inode->i_op = &nfs_referral_inode_operations; else inode->i_op = &nfs_mountpoint_inode_operations; inode->i_fop = NULL; - set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags); + inode->i_flags |= S_AUTOMOUNT; } } else if (S_ISLNK(inode->i_mode)) inode->i_op = &nfs_symlink_inode_operations; @@ -309,58 +409,51 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) memset(&inode->i_atime, 0, sizeof(inode->i_atime)); memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); - nfsi->change_attr = 0; + inode->i_version = 0; inode->i_size = 0; - inode->i_nlink = 0; - inode->i_uid = -2; - inode->i_gid = -2; + clear_nlink(inode); + inode->i_uid = make_kuid(&init_user_ns, -2); + inode->i_gid = make_kgid(&init_user_ns, -2); inode->i_blocks = 0; memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); + nfsi->write_io = 0; + nfsi->read_io = 0; nfsi->read_cache_jiffies = fattr->time_start; nfsi->attr_gencount = fattr->gencount; if (fattr->valid & NFS_ATTR_FATTR_ATIME) inode->i_atime = fattr->atime; else if (nfs_server_capable(inode, NFS_CAP_ATIME)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_MTIME) inode->i_mtime = fattr->mtime; else if (nfs_server_capable(inode, NFS_CAP_MTIME)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_DATA; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_CTIME) inode->i_ctime = fattr->ctime; else if (nfs_server_capable(inode, NFS_CAP_CTIME)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_CHANGE) - nfsi->change_attr = fattr->change_attr; + inode->i_version = fattr->change_attr; else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_DATA; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_SIZE) inode->i_size = nfs_size_to_loff_t(fattr->size); else - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_DATA - | NFS_INO_REVAL_PAGECACHE; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR + | NFS_INO_REVAL_PAGECACHE); if (fattr->valid & NFS_ATTR_FATTR_NLINK) - inode->i_nlink = fattr->nlink; + set_nlink(inode, fattr->nlink); else if (nfs_server_capable(inode, NFS_CAP_NLINK)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_OWNER) inode->i_uid = fattr->uid; else if (nfs_server_capable(inode, NFS_CAP_OWNER)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_GROUP) inode->i_gid = fattr->gid; else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) - nfsi->cache_validity |= NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) inode->i_blocks = fattr->du.nfs2.blocks; if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { @@ -369,18 +462,22 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) */ inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); } + + nfs_setsecurity(inode, fattr, label); + nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = now; nfsi->access_cache = RB_ROOT; - nfs_fscache_init_inode_cookie(inode); + nfs_fscache_init_inode(inode); unlock_new_inode(inode); } else nfs_refresh_inode(inode, fattr); - dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", + dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", inode->i_sb->s_id, - (long long)NFS_FILEID(inode), + (unsigned long long)NFS_FILEID(inode), + nfs_display_fhandle_hash(fh), atomic_read(&inode->i_count)); out: @@ -390,8 +487,9 @@ out_no_inode: dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); goto out; } +EXPORT_SYMBOL_GPL(nfs_fhget); -#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE) +#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) int nfs_setattr(struct dentry *dentry, struct iattr *attr) @@ -413,12 +511,16 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) /* Optimization: if the end result is no change, don't RPC */ attr->ia_valid &= NFS_VALID_ATTRS; - if ((attr->ia_valid & ~ATTR_FILE) == 0) + if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) return 0; + trace_nfs_setattr_enter(inode); + /* Write all dirty data */ - if (S_ISREG(inode->i_mode)) + if (S_ISREG(inode->i_mode)) { + nfs_inode_dio_wait(inode); nfs_wb_all(inode); + } fattr = nfs_alloc_fattr(); if (fattr == NULL) @@ -427,14 +529,16 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) * Return any delegations if we're going to change ACLs */ if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) - nfs_inode_return_delegation(inode); + NFS_PROTO(inode)->return_delegation(inode); error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); if (error == 0) - nfs_refresh_inode(inode, fattr); + error = nfs_refresh_inode(inode, fattr); nfs_free_fattr(fattr); out: + trace_nfs_setattr_exit(inode, error); return error; } +EXPORT_SYMBOL_GPL(nfs_setattr); /** * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall @@ -447,7 +551,6 @@ out: */ static int nfs_vmtruncate(struct inode * inode, loff_t offset) { - loff_t oldsize; int err; err = inode_newsize_ok(inode, offset); @@ -455,11 +558,13 @@ static int nfs_vmtruncate(struct inode * inode, loff_t offset) goto out; spin_lock(&inode->i_lock); - oldsize = inode->i_size; i_size_write(inode, offset); + /* Optimisation */ + if (offset == 0) + NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; spin_unlock(&inode->i_lock); - truncate_pagecache(inode, oldsize, offset); + truncate_pagecache(inode, offset); out: return err; } @@ -485,7 +590,8 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) inode->i_uid = attr->ia_uid; if ((attr->ia_valid & ATTR_GID) != 0) inode->i_gid = attr->ia_gid; - NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL); spin_unlock(&inode->i_lock); } if ((attr->ia_valid & ATTR_SIZE) != 0) { @@ -493,6 +599,26 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) nfs_vmtruncate(inode, attr->ia_size); } } +EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); + +static void nfs_request_parent_use_readdirplus(struct dentry *dentry) +{ + struct dentry *parent; + + parent = dget_parent(dentry); + nfs_force_use_readdirplus(parent->d_inode); + dput(parent); +} + +static bool nfs_need_revalidate_inode(struct inode *inode) +{ + if (NFS_I(inode)->cache_validity & + (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) + return true; + if (nfs_attribute_cache_expired(inode)) + return true; + return false; +} int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { @@ -500,8 +626,10 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; int err; + trace_nfs_getattr_enter(inode); /* Flush out writes to the server in order to update c/mtime. */ if (S_ISREG(inode->i_mode)) { + nfs_inode_dio_wait(inode); err = filemap_write_and_wait(inode->i_mapping); if (err) goto out; @@ -520,45 +648,52 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) need_atime = 0; - if (need_atime) - err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); - else - err = nfs_revalidate_inode(NFS_SERVER(inode), inode); + if (need_atime || nfs_need_revalidate_inode(inode)) { + struct nfs_server *server = NFS_SERVER(inode); + + if (server->caps & NFS_CAP_READDIRPLUS) + nfs_request_parent_use_readdirplus(dentry); + err = __nfs_revalidate_inode(server, inode); + } if (!err) { generic_fillattr(inode, stat); stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); } out: + trace_nfs_getattr_exit(inode, err); return err; } +EXPORT_SYMBOL_GPL(nfs_getattr); static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) { atomic_set(&l_ctx->count, 1); - l_ctx->lockowner = current->files; - l_ctx->pid = current->tgid; + l_ctx->lockowner.l_owner = current->files; + l_ctx->lockowner.l_pid = current->tgid; INIT_LIST_HEAD(&l_ctx->list); + nfs_iocounter_init(&l_ctx->io_count); } static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) { - struct nfs_lock_context *pos; + struct nfs_lock_context *head = &ctx->lock_context; + struct nfs_lock_context *pos = head; - list_for_each_entry(pos, &ctx->lock_context.list, list) { - if (pos->lockowner != current->files) + do { + if (pos->lockowner.l_owner != current->files) continue; - if (pos->pid != current->tgid) + if (pos->lockowner.l_pid != current->tgid) continue; atomic_inc(&pos->count); return pos; - } + } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); return NULL; } struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) { struct nfs_lock_context *res, *new = NULL; - struct inode *inode = ctx->path.dentry->d_inode; + struct inode *inode = ctx->dentry->d_inode; spin_lock(&inode->i_lock); res = __nfs_find_lock_context(ctx); @@ -566,7 +701,7 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) spin_unlock(&inode->i_lock); new = kmalloc(sizeof(*new), GFP_KERNEL); if (new == NULL) - return NULL; + return ERR_PTR(-ENOMEM); nfs_init_lock_context(new); spin_lock(&inode->i_lock); res = __nfs_find_lock_context(ctx); @@ -585,7 +720,7 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) void nfs_put_lock_context(struct nfs_lock_context *l_ctx) { struct nfs_open_context *ctx = l_ctx->open_context; - struct inode *inode = ctx->path.dentry->d_inode; + struct inode *inode = ctx->dentry->d_inode; if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) return; @@ -611,7 +746,7 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync) return; if (!is_sync) return; - inode = ctx->path.dentry->d_inode; + inode = ctx->dentry->d_inode; if (!list_empty(&NFS_I(inode)->open_files)) return; server = NFS_SERVER(inode); @@ -619,27 +754,34 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync) return; nfs_revalidate_inode(server, inode); } +EXPORT_SYMBOL_GPL(nfs_close_context); -struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode) +struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) { struct nfs_open_context *ctx; + struct rpc_cred *cred = rpc_lookup_cred(); + if (IS_ERR(cred)) + return ERR_CAST(cred); ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); - if (ctx != NULL) { - ctx->path = *path; - path_get(&ctx->path); - ctx->cred = get_rpccred(cred); - ctx->state = NULL; - ctx->mode = f_mode; - ctx->flags = 0; - ctx->error = 0; - ctx->dir_cookie = 0; - nfs_init_lock_context(&ctx->lock_context); - ctx->lock_context.open_context = ctx; - INIT_LIST_HEAD(&ctx->list); + if (!ctx) { + put_rpccred(cred); + return ERR_PTR(-ENOMEM); } + nfs_sb_active(dentry->d_sb); + ctx->dentry = dget(dentry); + ctx->cred = cred; + ctx->state = NULL; + ctx->mode = f_mode; + ctx->flags = 0; + ctx->error = 0; + nfs_init_lock_context(&ctx->lock_context); + ctx->lock_context.open_context = ctx; + INIT_LIST_HEAD(&ctx->list); + ctx->mdsthreshold = NULL; return ctx; } +EXPORT_SYMBOL_GPL(alloc_nfs_open_context); struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) { @@ -647,10 +789,12 @@ struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) atomic_inc(&ctx->lock_context.count); return ctx; } +EXPORT_SYMBOL_GPL(get_nfs_open_context); static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) { - struct inode *inode = ctx->path.dentry->d_inode; + struct inode *inode = ctx->dentry->d_inode; + struct super_block *sb = ctx->dentry->d_sb; if (!list_empty(&ctx->list)) { if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) @@ -663,7 +807,9 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) NFS_PROTO(inode)->close_context(ctx, is_sync); if (ctx->cred != NULL) put_rpccred(ctx->cred); - path_put(&ctx->path); + dput(ctx->dentry); + nfs_sb_deactive(sb); + kfree(ctx->mdsthreshold); kfree(ctx); } @@ -671,21 +817,30 @@ void put_nfs_open_context(struct nfs_open_context *ctx) { __put_nfs_open_context(ctx, 0); } +EXPORT_SYMBOL_GPL(put_nfs_open_context); /* * Ensure that mmap has a recent RPC credential for use when writing out * shared pages */ -void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) +void nfs_inode_attach_open_context(struct nfs_open_context *ctx) { - struct inode *inode = filp->f_path.dentry->d_inode; + struct inode *inode = ctx->dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); - filp->private_data = get_nfs_open_context(ctx); spin_lock(&inode->i_lock); list_add(&ctx->list, &nfsi->open_files); spin_unlock(&inode->i_lock); } +EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); + +void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) +{ + filp->private_data = get_nfs_open_context(ctx); + if (list_empty(&ctx->list)) + nfs_inode_attach_open_context(ctx); +} +EXPORT_SYMBOL_GPL(nfs_file_set_open_context); /* * Given an inode, search for an open context with the desired characteristics @@ -710,10 +865,11 @@ struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_c static void nfs_file_clear_open_context(struct file *filp) { - struct inode *inode = filp->f_path.dentry->d_inode; struct nfs_open_context *ctx = nfs_file_open_context(filp); if (ctx) { + struct inode *inode = ctx->dentry->d_inode; + filp->private_data = NULL; spin_lock(&inode->i_lock); list_move_tail(&ctx->list, &NFS_I(inode)->open_files); @@ -728,18 +884,13 @@ static void nfs_file_clear_open_context(struct file *filp) int nfs_open(struct inode *inode, struct file *filp) { struct nfs_open_context *ctx; - struct rpc_cred *cred; - cred = rpc_lookup_cred(); - if (IS_ERR(cred)) - return PTR_ERR(cred); - ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode); - put_rpccred(cred); - if (ctx == NULL) - return -ENOMEM; + ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); nfs_file_set_open_context(filp, ctx); put_nfs_open_context(ctx); - nfs_fscache_set_inode_cookie(inode, filp); + nfs_fscache_open_file(inode, filp); return 0; } @@ -757,11 +908,14 @@ int __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) { int status = -ESTALE; + struct nfs4_label *label = NULL; struct nfs_fattr *fattr = NULL; struct nfs_inode *nfsi = NFS_I(inode); - dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", - inode->i_sb->s_id, (long long)NFS_FILEID(inode)); + dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", + inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); + + trace_nfs_revalidate_inode_enter(inode); if (is_bad_inode(inode)) goto out; @@ -774,36 +928,48 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) goto out; nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); - status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); + + label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); + if (IS_ERR(label)) { + status = PTR_ERR(label); + goto out; + } + + status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); if (status != 0) { - dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", + dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", inode->i_sb->s_id, - (long long)NFS_FILEID(inode), status); + (unsigned long long)NFS_FILEID(inode), status); if (status == -ESTALE) { nfs_zap_caches(inode); if (!S_ISDIR(inode->i_mode)) set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); } - goto out; + goto err_out; } status = nfs_refresh_inode(inode, fattr); if (status) { - dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", + dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", inode->i_sb->s_id, - (long long)NFS_FILEID(inode), status); - goto out; + (unsigned long long)NFS_FILEID(inode), status); + goto err_out; } if (nfsi->cache_validity & NFS_INO_INVALID_ACL) nfs_zap_acl_cache(inode); - dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", + nfs_setsecurity(inode, fattr, label); + + dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", inode->i_sb->s_id, - (long long)NFS_FILEID(inode)); + (unsigned long long)NFS_FILEID(inode)); - out: +err_out: + nfs4_label_free(label); +out: nfs_free_fattr(fattr); + trace_nfs_revalidate_inode_exit(inode, status); return status; } @@ -814,7 +980,7 @@ int nfs_attribute_timeout(struct inode *inode) return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); } -static int nfs_attribute_cache_expired(struct inode *inode) +int nfs_attribute_cache_expired(struct inode *inode) { if (nfs_have_delegated_attributes(inode)) return 0; @@ -830,33 +996,50 @@ static int nfs_attribute_cache_expired(struct inode *inode) */ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) { - if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) - && !nfs_attribute_cache_expired(inode)) + if (!nfs_need_revalidate_inode(inode)) return NFS_STALE(inode) ? -ESTALE : 0; return __nfs_revalidate_inode(server, inode); } +EXPORT_SYMBOL_GPL(nfs_revalidate_inode); static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) { struct nfs_inode *nfsi = NFS_I(inode); - + int ret; + if (mapping->nrpages != 0) { - int ret = invalidate_inode_pages2(mapping); + if (S_ISREG(inode->i_mode)) { + ret = nfs_sync_mapping(mapping); + if (ret < 0) + return ret; + } + ret = invalidate_inode_pages2(mapping); if (ret < 0) return ret; } - spin_lock(&inode->i_lock); - nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode)) { + spin_lock(&inode->i_lock); memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); - spin_unlock(&inode->i_lock); + spin_unlock(&inode->i_lock); + } nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); - nfs_fscache_reset_inode_cookie(inode); - dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", - inode->i_sb->s_id, (long long)NFS_FILEID(inode)); + nfs_fscache_wait_on_invalidate(inode); + + dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", + inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(inode)); return 0; } +static bool nfs_mapping_need_revalidate_inode(struct inode *inode) +{ + if (nfs_have_delegated_attributes(inode)) + return false; + return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) + || nfs_attribute_timeout(inode) + || NFS_STALE(inode); +} + /** * nfs_revalidate_mapping - Revalidate the pagecache * @inode - pointer to host inode @@ -865,50 +1048,100 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) { struct nfs_inode *nfsi = NFS_I(inode); + unsigned long *bitlock = &nfsi->flags; int ret = 0; - if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) - || nfs_attribute_cache_expired(inode) - || NFS_STALE(inode)) { + /* swapfiles are not supposed to be shared. */ + if (IS_SWAPFILE(inode)) + goto out; + + if (nfs_mapping_need_revalidate_inode(inode)) { ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); if (ret < 0) goto out; } - if (nfsi->cache_validity & NFS_INO_INVALID_DATA) - ret = nfs_invalidate_mapping(inode, mapping); + + /* + * We must clear NFS_INO_INVALID_DATA first to ensure that + * invalidations that come in while we're shooting down the mappings + * are respected. But, that leaves a race window where one revalidator + * can clear the flag, and then another checks it before the mapping + * gets invalidated. Fix that by serializing access to this part of + * the function. + * + * At the same time, we need to allow other tasks to see whether we + * might be in the middle of invalidating the pages, so we only set + * the bit lock here if it looks like we're going to be doing that. + */ + for (;;) { + ret = wait_on_bit(bitlock, NFS_INO_INVALIDATING, + nfs_wait_bit_killable, TASK_KILLABLE); + if (ret) + goto out; + spin_lock(&inode->i_lock); + if (test_bit(NFS_INO_INVALIDATING, bitlock)) { + spin_unlock(&inode->i_lock); + continue; + } + if (nfsi->cache_validity & NFS_INO_INVALID_DATA) + break; + spin_unlock(&inode->i_lock); + goto out; + } + + set_bit(NFS_INO_INVALIDATING, bitlock); + smp_wmb(); + nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; + spin_unlock(&inode->i_lock); + trace_nfs_invalidate_mapping_enter(inode); + ret = nfs_invalidate_mapping(inode, mapping); + trace_nfs_invalidate_mapping_exit(inode, ret); + + clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); + smp_mb__after_atomic(); + wake_up_bit(bitlock, NFS_INO_INVALIDATING); out: return ret; } -static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) +static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) { struct nfs_inode *nfsi = NFS_I(inode); + unsigned long ret = 0; if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) && (fattr->valid & NFS_ATTR_FATTR_CHANGE) - && nfsi->change_attr == fattr->pre_change_attr) { - nfsi->change_attr = fattr->change_attr; + && inode->i_version == fattr->pre_change_attr) { + inode->i_version = fattr->change_attr; if (S_ISDIR(inode->i_mode)) - nfsi->cache_validity |= NFS_INO_INVALID_DATA; + nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); + ret |= NFS_INO_INVALID_ATTR; } /* If we have atomic WCC data, we may update some attributes */ if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) && (fattr->valid & NFS_ATTR_FATTR_CTIME) - && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) - memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); + && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { + memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); + ret |= NFS_INO_INVALID_ATTR; + } if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) && (fattr->valid & NFS_ATTR_FATTR_MTIME) && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { - memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); - if (S_ISDIR(inode->i_mode)) - nfsi->cache_validity |= NFS_INO_INVALID_DATA; + memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); + if (S_ISDIR(inode->i_mode)) + nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); + ret |= NFS_INO_INVALID_ATTR; } if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) && (fattr->valid & NFS_ATTR_FATTR_SIZE) && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) - && nfsi->npages == 0) - i_size_write(inode, nfs_size_to_loff_t(fattr->size)); + && nfsi->npages == 0) { + i_size_write(inode, nfs_size_to_loff_t(fattr->size)); + ret |= NFS_INO_INVALID_ATTR; + } + + return ret; } /** @@ -927,6 +1160,8 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat unsigned long invalid = 0; + if (nfs_have_delegated_attributes(inode)) + return 0; /* Has the inode gone and changed behind our back? */ if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) return -EIO; @@ -934,12 +1169,12 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat return -EIO; if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && - nfsi->change_attr != fattr->change_attr) + inode->i_version != fattr->change_attr) invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; /* Verify a few of the more important attributes */ if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) - invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; + invalid |= NFS_INO_INVALID_ATTR; if (fattr->valid & NFS_ATTR_FATTR_SIZE) { cur_size = i_size_read(inode); @@ -951,9 +1186,9 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat /* Have any file permissions changed? */ if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; - if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid) + if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; - if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid) + if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; /* Has the link count changed? */ @@ -964,7 +1199,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat invalid |= NFS_INO_INVALID_ATIME; if (invalid != 0) - nfsi->cache_validity |= invalid; + nfs_set_cache_invalid(inode, invalid); nfsi->read_cache_jiffies = fattr->time_start; return 0; @@ -1001,7 +1236,10 @@ void nfs_fattr_init(struct nfs_fattr *fattr) fattr->valid = 0; fattr->time_start = jiffies; fattr->gencount = nfs_inc_attr_generation_counter(); + fattr->owner_name = NULL; + fattr->group_name = NULL; } +EXPORT_SYMBOL_GPL(nfs_fattr_init); struct nfs_fattr *nfs_alloc_fattr(void) { @@ -1012,6 +1250,7 @@ struct nfs_fattr *nfs_alloc_fattr(void) nfs_fattr_init(fattr); return fattr; } +EXPORT_SYMBOL_GPL(nfs_alloc_fattr); struct nfs_fh *nfs_alloc_fhandle(void) { @@ -1022,6 +1261,70 @@ struct nfs_fh *nfs_alloc_fhandle(void) fh->size = 0; return fh; } +EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); + +#ifdef NFS_DEBUG +/* + * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle + * in the same way that wireshark does + * + * @fh: file handle + * + * For debugging only. + */ +u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) +{ + /* wireshark uses 32-bit AUTODIN crc and does a bitwise + * not on the result */ + return nfs_fhandle_hash(fh); +} +EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); + +/* + * _nfs_display_fhandle - display an NFS file handle on the console + * + * @fh: file handle to display + * @caption: display caption + * + * For debugging only. + */ +void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) +{ + unsigned short i; + + if (fh == NULL || fh->size == 0) { + printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); + return; + } + + printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", + caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); + for (i = 0; i < fh->size; i += 16) { + __be32 *pos = (__be32 *)&fh->data[i]; + + switch ((fh->size - i - 1) >> 2) { + case 0: + printk(KERN_DEFAULT " %08x\n", + be32_to_cpup(pos)); + break; + case 1: + printk(KERN_DEFAULT " %08x %08x\n", + be32_to_cpup(pos), be32_to_cpup(pos + 1)); + break; + case 2: + printk(KERN_DEFAULT " %08x %08x %08x\n", + be32_to_cpup(pos), be32_to_cpup(pos + 1), + be32_to_cpup(pos + 2)); + break; + default: + printk(KERN_DEFAULT " %08x %08x %08x %08x\n", + be32_to_cpup(pos), be32_to_cpup(pos + 1), + be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); + } + } +} +EXPORT_SYMBOL_GPL(_nfs_display_fhandle); +#endif /** * nfs_inode_attrs_need_update - check if the inode attributes need updating @@ -1052,11 +1355,35 @@ static int nfs_inode_attrs_need_update(const struct inode *inode, const struct n ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); } +/* + * Don't trust the change_attribute, mtime, ctime or size if + * a pnfs LAYOUTCOMMIT is outstanding + */ +static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, + struct nfs_fattr *fattr) +{ + if (pnfs_layoutcommit_outstanding(inode)) + fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | + NFS_ATTR_FATTR_MTIME | + NFS_ATTR_FATTR_CTIME | + NFS_ATTR_FATTR_SIZE); +} + static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) { + int ret; + + trace_nfs_refresh_inode_enter(inode); + + nfs_inode_attrs_handle_layoutcommit(inode, fattr); + if (nfs_inode_attrs_need_update(inode, fattr)) - return nfs_update_inode(inode, fattr); - return nfs_check_inode_attributes(inode, fattr); + ret = nfs_update_inode(inode, fattr); + else + ret = nfs_check_inode_attributes(inode, fattr); + + trace_nfs_refresh_inode_exit(inode, ret); + return ret; } /** @@ -1081,14 +1408,15 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) return status; } +EXPORT_SYMBOL_GPL(nfs_refresh_inode); static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) { - struct nfs_inode *nfsi = NFS_I(inode); + unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; if (S_ISDIR(inode->i_mode)) - nfsi->cache_validity |= NFS_INO_INVALID_DATA; + invalid |= NFS_INO_INVALID_DATA; + nfs_set_cache_invalid(inode, invalid); if ((fattr->valid & NFS_ATTR_FATTR) == 0) return 0; return nfs_refresh_inode_locked(inode, fattr); @@ -1115,8 +1443,10 @@ int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) spin_lock(&inode->i_lock); status = nfs_post_op_update_inode_locked(inode, fattr); spin_unlock(&inode->i_lock); + return status; } +EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); /** * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache @@ -1145,7 +1475,7 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa } if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { - fattr->pre_change_attr = NFS_I(inode)->change_attr; + fattr->pre_change_attr = inode->i_version; fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; } if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && @@ -1168,6 +1498,7 @@ out_noforce: spin_unlock(&inode->i_lock); return status; } +EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); /* * Many nfs protocol calls return the new file attributes after @@ -1190,24 +1521,37 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) unsigned long now = jiffies; unsigned long save_cache_validity; - dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", + dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", __func__, inode->i_sb->s_id, inode->i_ino, + nfs_display_fhandle_hash(NFS_FH(inode)), atomic_read(&inode->i_count), fattr->valid); - if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) - goto out_fileid; + if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { + printk(KERN_ERR "NFS: server %s error: fileid changed\n" + "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", + NFS_SERVER(inode)->nfs_client->cl_hostname, + inode->i_sb->s_id, (long long)nfsi->fileid, + (long long)fattr->fileid); + goto out_err; + } /* * Make sure the inode's type hasn't changed. */ - if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) - goto out_changed; + if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { + /* + * Big trouble! The inode has become a different object. + */ + printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", + __func__, inode->i_ino, inode->i_mode, fattr->mode); + goto out_err; + } server = NFS_SERVER(inode); /* Update the fsid? */ if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && !nfs_fsid_equal(&server->fsid, &fattr->fsid) && - !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags)) + !IS_AUTOMOUNT(inode)) server->fsid = fattr->fsid; /* @@ -1222,54 +1566,37 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) | NFS_INO_REVAL_PAGECACHE); /* Do atomic weak cache consistency updates */ - nfs_wcc_update_inode(inode, fattr); + invalid |= nfs_wcc_update_inode(inode, fattr); /* More cache consistency checks */ if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { - if (nfsi->change_attr != fattr->change_attr) { + if (inode->i_version != fattr->change_attr) { dprintk("NFS: change_attr change on server for file %s/%ld\n", inode->i_sb->s_id, inode->i_ino); - invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; + invalid |= NFS_INO_INVALID_ATTR + | NFS_INO_INVALID_DATA + | NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL + | NFS_INO_REVAL_PAGECACHE; if (S_ISDIR(inode->i_mode)) nfs_force_lookup_revalidate(inode); - nfsi->change_attr = fattr->change_attr; + inode->i_version = fattr->change_attr; } } else if (server->caps & NFS_CAP_CHANGE_ATTR) - invalid |= save_cache_validity; + nfsi->cache_validity |= save_cache_validity; if (fattr->valid & NFS_ATTR_FATTR_MTIME) { - /* NFSv2/v3: Check if the mtime agrees */ - if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { - dprintk("NFS: mtime change on server for file %s/%ld\n", - inode->i_sb->s_id, inode->i_ino); - invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; - if (S_ISDIR(inode->i_mode)) - nfs_force_lookup_revalidate(inode); - memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); - } + memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); } else if (server->caps & NFS_CAP_MTIME) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_DATA - | NFS_INO_REVAL_PAGECACHE + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_REVAL_FORCED); if (fattr->valid & NFS_ATTR_FATTR_CTIME) { - /* If ctime has changed we should definitely clear access+acl caches */ - if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { - invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; - /* and probably clear data for a directory too as utimes can cause - * havoc with our cache. - */ - if (S_ISDIR(inode->i_mode)) { - invalid |= NFS_INO_INVALID_DATA; - nfs_force_lookup_revalidate(inode); - } - memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); - } + memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); } else if (server->caps & NFS_CAP_CTIME) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR - | NFS_INO_INVALID_ACCESS - | NFS_INO_INVALID_ACL + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_REVAL_FORCED); /* Check if our cached file size is stale */ @@ -1279,15 +1606,21 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) if (new_isize != cur_isize) { /* Do we perhaps have any outstanding writes, or has * the file grown beyond our last write? */ - if (nfsi->npages == 0 || new_isize > cur_isize) { + if ((nfsi->npages == 0) || new_isize > cur_isize) { i_size_write(inode, new_isize); invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; + invalid &= ~NFS_INO_REVAL_PAGECACHE; } - dprintk("NFS: isize change on server for file %s/%ld\n", - inode->i_sb->s_id, inode->i_ino); + dprintk("NFS: isize change on server for file %s/%ld " + "(%Ld to %Ld)\n", + inode->i_sb->s_id, + inode->i_ino, + (long long)cur_isize, + (long long)new_isize); } } else - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE | NFS_INO_REVAL_FORCED); @@ -1295,7 +1628,8 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) if (fattr->valid & NFS_ATTR_FATTR_ATIME) memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); else if (server->caps & NFS_CAP_ATIME) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATIME | NFS_INO_REVAL_FORCED); if (fattr->valid & NFS_ATTR_FATTR_MODE) { @@ -1306,29 +1640,32 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; } } else if (server->caps & NFS_CAP_MODE) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | NFS_INO_REVAL_FORCED); if (fattr->valid & NFS_ATTR_FATTR_OWNER) { - if (inode->i_uid != fattr->uid) { + if (!uid_eq(inode->i_uid, fattr->uid)) { invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; inode->i_uid = fattr->uid; } } else if (server->caps & NFS_CAP_OWNER) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | NFS_INO_REVAL_FORCED); if (fattr->valid & NFS_ATTR_FATTR_GROUP) { - if (inode->i_gid != fattr->gid) { + if (!gid_eq(inode->i_gid, fattr->gid)) { invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; inode->i_gid = fattr->gid; } } else if (server->caps & NFS_CAP_OWNER_GROUP) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | NFS_INO_REVAL_FORCED); @@ -1338,10 +1675,11 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) invalid |= NFS_INO_INVALID_ATTR; if (S_ISDIR(inode->i_mode)) invalid |= NFS_INO_INVALID_DATA; - inode->i_nlink = fattr->nlink; + set_nlink(inode, fattr->nlink); } } else if (server->caps & NFS_CAP_NLINK) - invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR + nfsi->cache_validity |= save_cache_validity & + (NFS_INO_INVALID_ATTR | NFS_INO_REVAL_FORCED); if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { @@ -1371,17 +1709,11 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) invalid &= ~NFS_INO_INVALID_DATA; - if (!nfs_have_delegation(inode, FMODE_READ) || + if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || (save_cache_validity & NFS_INO_REVAL_FORCED)) - nfsi->cache_validity |= invalid; + nfs_set_cache_invalid(inode, invalid); return 0; - out_changed: - /* - * Big trouble! The inode has become a different object. - */ - printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", - __func__, inode->i_ino, inode->i_mode, fattr->mode); out_err: /* * No need to worry about unhashing the dentry, as the @@ -1390,34 +1722,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) */ nfs_invalidate_inode(inode); return -ESTALE; - - out_fileid: - printk(KERN_ERR "NFS: server %s error: fileid changed\n" - "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", - NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, - (long long)nfsi->fileid, (long long)fattr->fileid); - goto out_err; -} - - -#ifdef CONFIG_NFS_V4 - -/* - * Clean out any remaining NFSv4 state that might be left over due - * to open() calls that passed nfs_atomic_lookup, but failed to call - * nfs_open(). - */ -void nfs4_evict_inode(struct inode *inode) -{ - truncate_inode_pages(&inode->i_data, 0); - end_writeback(inode); - pnfs_destroy_layout(NFS_I(inode)); - /* If we are holding a delegation, return it! */ - nfs_inode_return_delegation_noreclaim(inode); - /* First call standard NFS clear_inode() code */ - nfs_clear_inode(inode); } -#endif struct inode *nfs_alloc_inode(struct super_block *sb) { @@ -1427,24 +1732,28 @@ struct inode *nfs_alloc_inode(struct super_block *sb) return NULL; nfsi->flags = 0UL; nfsi->cache_validity = 0UL; -#ifdef CONFIG_NFS_V3_ACL - nfsi->acl_access = ERR_PTR(-EAGAIN); - nfsi->acl_default = ERR_PTR(-EAGAIN); -#endif -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) nfsi->nfs4_acl = NULL; #endif /* CONFIG_NFS_V4 */ return &nfsi->vfs_inode; } +EXPORT_SYMBOL_GPL(nfs_alloc_inode); -void nfs_destroy_inode(struct inode *inode) +static void nfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); } +void nfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, nfs_i_callback); +} +EXPORT_SYMBOL_GPL(nfs_destroy_inode); + static inline void nfs4_init_once(struct nfs_inode *nfsi) { -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) INIT_LIST_HEAD(&nfsi->open_states); nfsi->delegation = NULL; nfsi->delegation_state = 0; @@ -1461,9 +1770,10 @@ static void init_once(void *foo) INIT_LIST_HEAD(&nfsi->open_files); INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); - INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); + INIT_LIST_HEAD(&nfsi->commit_info.list); nfsi->npages = 0; - nfsi->ncommit = 0; + nfsi->commit_info.ncommit = 0; + atomic_set(&nfsi->commit_info.rpcs_out, 0); atomic_set(&nfsi->silly_count, 1); INIT_HLIST_HEAD(&nfsi->silly_list); init_waitqueue_head(&nfsi->waitqueue); @@ -1485,10 +1795,16 @@ static int __init nfs_init_inodecache(void) static void nfs_destroy_inodecache(void) { + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); kmem_cache_destroy(nfs_inode_cachep); } struct workqueue_struct *nfsiod_workqueue; +EXPORT_SYMBOL_GPL(nfsiod_workqueue); /* * start up the nfsiod workqueue @@ -1497,7 +1813,7 @@ static int nfsiod_start(void) { struct workqueue_struct *wq; dprintk("RPC: creating workqueue nfsiod\n"); - wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0); + wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); if (wq == NULL) return -ENOMEM; nfsiod_workqueue = wq; @@ -1518,6 +1834,27 @@ static void nfsiod_stop(void) destroy_workqueue(wq); } +int nfs_net_id; +EXPORT_SYMBOL_GPL(nfs_net_id); + +static int nfs_net_init(struct net *net) +{ + nfs_clients_init(net); + return 0; +} + +static void nfs_net_exit(struct net *net) +{ + nfs_cleanup_cb_ident_idr(net); +} + +static struct pernet_operations nfs_net_ops = { + .init = nfs_net_init, + .exit = nfs_net_exit, + .id = &nfs_net_id, + .size = sizeof(struct nfs_net), +}; + /* * Initialize NFS */ @@ -1525,75 +1862,70 @@ static int __init init_nfs_fs(void) { int err; - err = nfs_idmap_init(); + err = register_pernet_subsys(&nfs_net_ops); if (err < 0) goto out9; - err = nfs_dns_resolver_init(); - if (err < 0) - goto out8; - err = nfs_fscache_register(); if (err < 0) - goto out7; + goto out8; err = nfsiod_start(); if (err) - goto out6; + goto out7; err = nfs_fs_proc_init(); if (err) - goto out5; + goto out6; err = nfs_init_nfspagecache(); if (err) - goto out4; + goto out5; err = nfs_init_inodecache(); if (err) - goto out3; + goto out4; err = nfs_init_readpagecache(); if (err) - goto out2; + goto out3; err = nfs_init_writepagecache(); if (err) - goto out1; + goto out2; err = nfs_init_directcache(); if (err) - goto out0; + goto out1; #ifdef CONFIG_PROC_FS - rpc_proc_register(&nfs_rpcstat); + rpc_proc_register(&init_net, &nfs_rpcstat); #endif if ((err = register_nfs_fs()) != 0) - goto out; + goto out0; + return 0; -out: +out0: #ifdef CONFIG_PROC_FS - rpc_proc_unregister("nfs"); + rpc_proc_unregister(&init_net, "nfs"); #endif nfs_destroy_directcache(); -out0: - nfs_destroy_writepagecache(); out1: - nfs_destroy_readpagecache(); + nfs_destroy_writepagecache(); out2: - nfs_destroy_inodecache(); + nfs_destroy_readpagecache(); out3: - nfs_destroy_nfspagecache(); + nfs_destroy_inodecache(); out4: - nfs_fs_proc_exit(); + nfs_destroy_nfspagecache(); out5: - nfsiod_stop(); + nfs_fs_proc_exit(); out6: - nfs_fscache_unregister(); + nfsiod_stop(); out7: - nfs_dns_resolver_destroy(); + nfs_fscache_unregister(); out8: - nfs_idmap_quit(); + unregister_pernet_subsys(&nfs_net_ops); out9: return err; } @@ -1606,10 +1938,9 @@ static void __exit exit_nfs_fs(void) nfs_destroy_inodecache(); nfs_destroy_nfspagecache(); nfs_fscache_unregister(); - nfs_dns_resolver_destroy(); - nfs_idmap_quit(); + unregister_pernet_subsys(&nfs_net_ops); #ifdef CONFIG_PROC_FS - rpc_proc_unregister("nfs"); + rpc_proc_unregister(&init_net, "nfs"); #endif unregister_nfs_fs(); nfs_fs_proc_exit(); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index db08ff3ff45..f415cbf9f6c 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -5,6 +5,7 @@ #include "nfs4_fs.h" #include <linux/mount.h> #include <linux/security.h> +#include <linux/crc32.h> #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS) @@ -18,25 +19,21 @@ struct nfs_string; */ #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) -/* - * Determine if sessions are in use. - */ -static inline int nfs4_has_session(const struct nfs_client *clp) +static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) { -#ifdef CONFIG_NFS_V4_1 - if (clp->cl_session) - return 1; -#endif /* CONFIG_NFS_V4_1 */ - return 0; + if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) + fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT; } -static inline int nfs4_has_persistent_session(const struct nfs_client *clp) +static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr) { -#ifdef CONFIG_NFS_V4_1 - if (nfs4_has_session(clp)) - return (clp->cl_session->flags & SESSION4_PERSIST); -#endif /* CONFIG_NFS_V4_1 */ - return 0; + if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) || + (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) && + ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0))) + return 0; + + fattr->fileid = fattr->mounted_on_fileid; + return 1; } struct nfs_clone_mount { @@ -68,24 +65,36 @@ struct nfs_clone_mount { */ #define NFS_MAX_READDIR_PAGES 8 +struct nfs_client_initdata { + unsigned long init_flags; + const char *hostname; + const struct sockaddr *addr; + size_t addrlen; + struct nfs_subversion *nfs_mod; + int proto; + u32 minorversion; + struct net *net; +}; + /* * In-kernel mount arguments */ struct nfs_parsed_mount_data { int flags; - int rsize, wsize; - int timeo, retrans; - int acregmin, acregmax, + unsigned int rsize, wsize; + unsigned int timeo, retrans; + unsigned int acregmin, acregmax, acdirmin, acdirmax; - int namlen; + unsigned int namlen; unsigned int options; unsigned int bsize; - unsigned int auth_flavor_len; - rpc_authflavor_t auth_flavors[1]; + struct nfs_auth_info auth_info; + rpc_authflavor_t selected_flavor; char *client_address; unsigned int version; unsigned int minorversion; char *fscache_uniq; + bool need_mount; struct { struct sockaddr_storage address; @@ -106,6 +115,7 @@ struct nfs_parsed_mount_data { } nfs_server; struct security_mnt_opts lsm_opts; + struct net *net; }; /* mount_clnt.c */ @@ -120,31 +130,68 @@ struct nfs_mount_request { int noresvport; unsigned int *auth_flav_len; rpc_authflavor_t *auth_flavs; + struct net *net; +}; + +struct nfs_mount_info { + void (*fill_super)(struct super_block *, struct nfs_mount_info *); + int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *); + struct nfs_parsed_mount_data *parsed; + struct nfs_clone_mount *cloned; + struct nfs_fh *mntfh; }; extern int nfs_mount(struct nfs_mount_request *info); extern void nfs_umount(const struct nfs_mount_request *info); /* client.c */ -extern struct rpc_program nfs_program; - +extern const struct rpc_program nfs_program; +extern void nfs_clients_init(struct net *net); +extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *); +int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t); +struct nfs_client *nfs_get_client(const struct nfs_client_initdata *, + const struct rpc_timeout *, const char *, + rpc_authflavor_t); +int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *); +void nfs_server_insert_lists(struct nfs_server *); +void nfs_server_remove_lists(struct nfs_server *); +void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int); +int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t, + rpc_authflavor_t); +struct nfs_server *nfs_alloc_server(void); +void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *); + +extern void nfs_cleanup_cb_ident_idr(struct net *); extern void nfs_put_client(struct nfs_client *); -extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32); -extern struct nfs_client *nfs_find_client_next(struct nfs_client *); -extern struct nfs_server *nfs_create_server( - const struct nfs_parsed_mount_data *, - struct nfs_fh *); +extern void nfs_free_client(struct nfs_client *); +extern struct nfs_client *nfs4_find_client_ident(struct net *, int); +extern struct nfs_client * +nfs4_find_client_sessionid(struct net *, const struct sockaddr *, + struct nfs4_sessionid *, u32); +extern struct nfs_server *nfs_create_server(struct nfs_mount_info *, + struct nfs_subversion *); extern struct nfs_server *nfs4_create_server( - const struct nfs_parsed_mount_data *, - struct nfs_fh *); + struct nfs_mount_info *, + struct nfs_subversion *); extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *, struct nfs_fh *); +extern int nfs4_update_server(struct nfs_server *server, const char *hostname, + struct sockaddr *sap, size_t salen, + struct net *net); extern void nfs_free_server(struct nfs_server *server); extern struct nfs_server *nfs_clone_server(struct nfs_server *, struct nfs_fh *, - struct nfs_fattr *); + struct nfs_fattr *, + rpc_authflavor_t); +extern int nfs_wait_client_init_complete(const struct nfs_client *clp); extern void nfs_mark_client_ready(struct nfs_client *clp, int state); -extern int nfs4_check_client_ready(struct nfs_client *clp); +extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, + const struct sockaddr *ds_addr, + int ds_addrlen, int ds_proto, + unsigned int ds_timeo, + unsigned int ds_retrans); +extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *, + struct inode *); #ifdef CONFIG_PROC_FS extern int __init nfs_fs_proc_init(void); extern void nfs_fs_proc_exit(void); @@ -158,21 +205,22 @@ static inline void nfs_fs_proc_exit(void) } #endif -/* nfs4namespace.c */ -#ifdef CONFIG_NFS_V4 -extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry); -#else -static inline -struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) -{ - return ERR_PTR(-ENOENT); -} +#ifdef CONFIG_NFS_V4_1 +int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *); +#endif + +/* nfs3client.c */ +#if IS_ENABLED(CONFIG_NFS_V3) +struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *); +struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *, + struct nfs_fattr *, rpc_authflavor_t); #endif /* callback_xdr.c */ extern struct svc_version nfs4_callback_version1; extern struct svc_version nfs4_callback_version4; +struct nfs_pageio_descriptor; /* pagelist.c */ extern int __init nfs_init_nfspagecache(void); extern void nfs_destroy_nfspagecache(void); @@ -183,55 +231,146 @@ extern void nfs_destroy_writepagecache(void); extern int __init nfs_init_directcache(void); extern void nfs_destroy_directcache(void); +extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr, + void (*release)(struct nfs_pgio_header *hdr)); +void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); +int nfs_iocounter_wait(struct nfs_io_counter *c); + +extern const struct nfs_pageio_ops nfs_pgio_rw_ops; +struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *); +void nfs_rw_header_free(struct nfs_pgio_header *); +void nfs_pgio_data_release(struct nfs_pgio_data *); +int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); +int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *, + const struct rpc_call_ops *, int, int); +void nfs_free_request(struct nfs_page *req); + +static inline void nfs_iocounter_init(struct nfs_io_counter *c) +{ + c->flags = 0; + atomic_set(&c->io_count, 0); +} /* nfs2xdr.c */ -extern int nfs_stat_to_errno(int); extern struct rpc_procinfo nfs_procedures[]; -extern __be32 *nfs_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +extern int nfs2_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); /* nfs3xdr.c */ extern struct rpc_procinfo nfs3_procedures[]; -extern __be32 *nfs3_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +extern int nfs3_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); /* nfs4xdr.c */ -#ifdef CONFIG_NFS_V4 -extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +#if IS_ENABLED(CONFIG_NFS_V4) +extern int nfs4_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); #endif #ifdef CONFIG_NFS_V4_1 extern const u32 nfs41_maxread_overhead; extern const u32 nfs41_maxwrite_overhead; +extern const u32 nfs41_maxgetdevinfo_overhead; #endif /* nfs4proc.c */ -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) extern struct rpc_procinfo nfs4_procedures[]; #endif +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags); +static inline void nfs4_label_free(struct nfs4_label *label) +{ + if (label) { + kfree(label->label); + kfree(label); + } + return; +} + +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ + if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL)) + nfsi->cache_validity |= NFS_INO_INVALID_LABEL; +} +#else +static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; } +static inline void nfs4_label_free(void *label) {} +static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi) +{ +} +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ + /* proc.c */ void nfs_close_context(struct nfs_open_context *ctx, int is_sync); +extern struct nfs_client *nfs_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr); /* dir.c */ -extern int nfs_access_cache_shrinker(struct shrinker *shrink, - int nr_to_scan, gfp_t gfp_mask); +extern void nfs_force_use_readdirplus(struct inode *dir); +extern unsigned long nfs_access_cache_count(struct shrinker *shrink, + struct shrink_control *sc); +extern unsigned long nfs_access_cache_scan(struct shrinker *shrink, + struct shrink_control *sc); +struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int); +int nfs_create(struct inode *, struct dentry *, umode_t, bool); +int nfs_mkdir(struct inode *, struct dentry *, umode_t); +int nfs_rmdir(struct inode *, struct dentry *); +int nfs_unlink(struct inode *, struct dentry *); +int nfs_symlink(struct inode *, struct dentry *, const char *); +int nfs_link(struct dentry *, struct inode *, struct dentry *); +int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); +int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); + +/* file.c */ +int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int); +loff_t nfs_file_llseek(struct file *, loff_t, int); +int nfs_file_flush(struct file *, fl_owner_t); +ssize_t nfs_file_read(struct kiocb *, struct iov_iter *); +ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, + size_t, unsigned int); +int nfs_file_mmap(struct file *, struct vm_area_struct *); +ssize_t nfs_file_write(struct kiocb *, struct iov_iter *); +int nfs_file_release(struct inode *, struct file *); +int nfs_lock(struct file *, int, struct file_lock *); +int nfs_flock(struct file *, int, struct file_lock *); +int nfs_check_flags(int); +int nfs_setlease(struct file *, long, struct file_lock **); /* inode.c */ extern struct workqueue_struct *nfsiod_workqueue; extern struct inode *nfs_alloc_inode(struct super_block *sb); extern void nfs_destroy_inode(struct inode *); extern int nfs_write_inode(struct inode *, struct writeback_control *); +extern int nfs_drop_inode(struct inode *); +extern void nfs_clear_inode(struct inode *); extern void nfs_evict_inode(struct inode *); -#ifdef CONFIG_NFS_V4 -extern void nfs4_evict_inode(struct inode *); -#endif void nfs_zap_acl_cache(struct inode *inode); extern int nfs_wait_bit_killable(void *word); /* super.c */ +extern const struct super_operations nfs_sops; +extern struct file_system_type nfs_fs_type; extern struct file_system_type nfs_xdev_fs_type; -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) extern struct file_system_type nfs4_xdev_fs_type; extern struct file_system_type nfs4_referral_fs_type; #endif +bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t); +struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *, + struct nfs_subversion *); +void nfs_initialise_sb(struct super_block *); +int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); +int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *); +struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *, + struct nfs_mount_info *, struct nfs_subversion *); +struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *); +struct dentry * nfs_xdev_mount_common(struct file_system_type *, int, + const char *, struct nfs_mount_info *); +void nfs_kill_super(struct super_block *); +void nfs_fill_super(struct super_block *, struct nfs_mount_info *); extern struct rpc_stat nfs_rpcstat; @@ -241,52 +380,127 @@ extern void nfs_sb_active(struct super_block *sb); extern void nfs_sb_deactive(struct super_block *sb); /* namespace.c */ -extern char *nfs_path(const char *base, - const struct dentry *droot, - const struct dentry *dentry, - char *buffer, ssize_t buflen); +#define NFS_PATH_CANONICAL 1 +extern char *nfs_path(char **p, struct dentry *dentry, + char *buffer, ssize_t buflen, unsigned flags); +extern struct vfsmount *nfs_d_automount(struct path *path); +struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, + struct nfs_fh *, struct nfs_fattr *); +struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *, + struct nfs_fattr *, rpc_authflavor_t); /* getroot.c */ -extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *); -#ifdef CONFIG_NFS_V4 -extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *); +extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *, + const char *); +#if IS_ENABLED(CONFIG_NFS_V4) +extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *, + const char *); -extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); +extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool); #endif +struct nfs_pgio_completion_ops; /* read.c */ +extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, + struct inode *inode, bool force_mds, + const struct nfs_pgio_completion_ops *compl_ops); extern void nfs_read_prepare(struct rpc_task *task, void *calldata); +extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); + +/* super.c */ +void nfs_clone_super(struct super_block *, struct nfs_mount_info *); +void nfs_umount_begin(struct super_block *); +int nfs_statfs(struct dentry *, struct kstatfs *); +int nfs_show_options(struct seq_file *, struct dentry *); +int nfs_show_devname(struct seq_file *, struct dentry *); +int nfs_show_path(struct seq_file *, struct dentry *); +int nfs_show_stats(struct seq_file *, struct dentry *); +void nfs_put_super(struct super_block *); +int nfs_remount(struct super_block *sb, int *flags, char *raw_data); /* write.c */ +extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, + struct inode *inode, int ioflags, bool force_mds, + const struct nfs_pgio_completion_ops *compl_ops); +extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); +extern void nfs_commit_free(struct nfs_commit_data *p); extern void nfs_write_prepare(struct rpc_task *task, void *calldata); +extern void nfs_commit_prepare(struct rpc_task *task, void *calldata); +extern int nfs_initiate_commit(struct rpc_clnt *clnt, + struct nfs_commit_data *data, + const struct rpc_call_ops *call_ops, + int how, int flags); +extern void nfs_init_commit(struct nfs_commit_data *data, + struct list_head *head, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo); +int nfs_scan_commit_list(struct list_head *src, struct list_head *dst, + struct nfs_commit_info *cinfo, int max); +unsigned long nfs_reqs_to_commit(struct nfs_commit_info *); +int nfs_scan_commit(struct inode *inode, struct list_head *dst, + struct nfs_commit_info *cinfo); +void nfs_mark_request_commit(struct nfs_page *req, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo); +int nfs_generic_commit_list(struct inode *inode, struct list_head *head, + int how, struct nfs_commit_info *cinfo); +void nfs_retry_commit(struct list_head *page_list, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo); +void nfs_commitdata_release(struct nfs_commit_data *data); +void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, + struct nfs_commit_info *cinfo); +void nfs_request_remove_commit_list(struct nfs_page *req, + struct nfs_commit_info *cinfo); +void nfs_init_cinfo(struct nfs_commit_info *cinfo, + struct inode *inode, + struct nfs_direct_req *dreq); +int nfs_key_timeout_notify(struct file *filp, struct inode *inode); +bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx); + #ifdef CONFIG_MIGRATION extern int nfs_migrate_page(struct address_space *, - struct page *, struct page *); + struct page *, struct page *, enum migrate_mode); #else #define nfs_migrate_page NULL #endif +/* unlink.c */ +extern struct rpc_task * +nfs_async_rename(struct inode *old_dir, struct inode *new_dir, + struct dentry *old_dentry, struct dentry *new_dentry, + void (*complete)(struct rpc_task *, struct nfs_renamedata *)); +extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); + +/* direct.c */ +void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, + struct nfs_direct_req *dreq); +static inline void nfs_inode_dio_wait(struct inode *inode) +{ + inode_dio_wait(inode); +} +extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); + /* nfs4proc.c */ -extern int _nfs4_call_sync(struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); -extern int _nfs4_call_sync_session(struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); +extern void __nfs4_read_done_cb(struct nfs_pgio_data *); +extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr); +extern int nfs40_walk_client_list(struct nfs_client *clp, + struct nfs_client **result, + struct rpc_cred *cred); +extern int nfs41_walk_client_list(struct nfs_client *clp, + struct nfs_client **result, + struct rpc_cred *cred); /* * Determine the device name as a string */ -static inline char *nfs_devname(const struct vfsmount *mnt_parent, - const struct dentry *dentry, +static inline char *nfs_devname(struct dentry *dentry, char *buffer, ssize_t buflen) { - return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root, - dentry, buffer, buflen); + char *dummy; + return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); } /* @@ -349,19 +563,29 @@ void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) static inline unsigned int nfs_page_length(struct page *page) { - loff_t i_size = i_size_read(page->mapping->host); + loff_t i_size = i_size_read(page_file_mapping(page)->host); if (i_size > 0) { + pgoff_t page_index = page_file_index(page); pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; - if (page->index < end_index) + if (page_index < end_index) return PAGE_CACHE_SIZE; - if (page->index == end_index) + if (page_index == end_index) return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1; } return 0; } /* + * Convert a umode to a dirent->d_type + */ +static inline +unsigned char nfs_umode_to_dtype(umode_t mode) +{ + return (mode >> 12) & 15; +} + +/* * Determine the number of pages in an array of length 'len' and * with a base offset of 'base' */ @@ -373,12 +597,33 @@ unsigned int nfs_page_array_len(unsigned int base, size_t len) } /* - * Helper for restarting RPC calls in the possible presence of NFSv4.1 - * sessions. + * Convert a struct timespec into a 64-bit change attribute + * + * This does approximately the same thing as timespec_to_ns(), + * but for calculation efficiency, we multiply the seconds by + * 1024*1024*1024. */ -static inline int nfs_restart_rpc(struct rpc_task *task, const struct nfs_client *clp) +static inline +u64 nfs_timespec_to_change_attr(const struct timespec *ts) { - if (nfs4_has_session(clp)) - return rpc_restart_call_prepare(task); - return rpc_restart_call(task); + return ((u64)ts->tv_sec << 30) + ts->tv_nsec; } + +#ifdef CONFIG_CRC32 +/** + * nfs_fhandle_hash - calculate the crc32 hash for the filehandle + * @fh - pointer to filehandle + * + * returns a crc32 hash for the filehandle that is compatible with + * the one displayed by "wireshark". + */ +static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) +{ + return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size); +} +#else +static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh) +{ + return 0; +} +#endif diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index eceafe74f47..99a45283b9e 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -16,7 +16,7 @@ #include <linux/nfs_fs.h> #include "internal.h" -#ifdef RPC_DEBUG +#ifdef NFS_DEBUG # define NFSDBG_FACILITY NFSDBG_MOUNT #endif @@ -67,7 +67,7 @@ enum { MOUNTPROC3_EXPORT = 5, }; -static struct rpc_program mnt_program; +static const struct rpc_program mnt_program; /* * Defined by OpenGroup XNFS Version 3W, chapter 8 @@ -139,7 +139,10 @@ struct mnt_fhstatus { * nfs_mount - Obtain an NFS file handle for the given host and path * @info: pointer to mount request arguments * - * Uses default timeout parameters specified by underlying transport. + * Uses default timeout parameters specified by underlying transport. On + * successful return, the auth_flavs list and auth_flav_len will be populated + * with the list from the server or a faked-up list if the server didn't + * provide one. */ int nfs_mount(struct nfs_mount_request *info) { @@ -153,7 +156,7 @@ int nfs_mount(struct nfs_mount_request *info) .rpc_resp = &result, }; struct rpc_create_args args = { - .net = &init_net, + .net = info->net, .protocol = info->protocol, .address = info->sap, .addrsize = info->salen, @@ -169,6 +172,9 @@ int nfs_mount(struct nfs_mount_request *info) (info->hostname ? info->hostname : "server"), info->dirpath); + if (strlen(info->dirpath) > MNTPATHLEN) + return -ENAMETOOLONG; + if (info->noresvport) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; @@ -181,7 +187,7 @@ int nfs_mount(struct nfs_mount_request *info) else msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT]; - status = rpc_call_sync(mnt_clnt, &msg, 0); + status = rpc_call_sync(mnt_clnt, &msg, RPC_TASK_SOFT|RPC_TASK_TIMEOUT); rpc_shutdown_client(mnt_clnt); if (status < 0) @@ -192,6 +198,15 @@ int nfs_mount(struct nfs_mount_request *info) dprintk("NFS: MNT request succeeded\n"); status = 0; + /* + * If the server didn't provide a flavor list, allow the + * client to try any flavor. + */ + if (info->version != NFS_MNT3_VERSION || *info->auth_flav_len == 0) { + dprintk("NFS: Faking up auth_flavs list\n"); + info->auth_flavs[0] = RPC_AUTH_NULL; + *info->auth_flav_len = 1; + } out: return status; @@ -225,7 +240,7 @@ void nfs_umount(const struct nfs_mount_request *info) .to_retries = 2, }; struct rpc_create_args args = { - .net = &init_net, + .net = info->net, .protocol = IPPROTO_UDP, .address = info->sap, .addrsize = info->salen, @@ -236,19 +251,20 @@ void nfs_umount(const struct nfs_mount_request *info) .authflavor = RPC_AUTH_UNIX, .flags = RPC_CLNT_CREATE_NOPING, }; - struct mountres result; struct rpc_message msg = { .rpc_argp = info->dirpath, - .rpc_resp = &result, }; struct rpc_clnt *clnt; int status; + if (strlen(info->dirpath) > MNTPATHLEN) + return; + if (info->noresvport) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; clnt = rpc_create(&args); - if (unlikely(IS_ERR(clnt))) + if (IS_ERR(clnt)) goto out_clnt_err; dprintk("NFS: sending UMNT request for %s:%s\n", @@ -280,29 +296,19 @@ out_call_err: * XDR encode/decode functions for MOUNT */ -static int encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) +static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) { const u32 pathname_len = strlen(pathname); __be32 *p; - if (unlikely(pathname_len > MNTPATHLEN)) - return -EIO; - - p = xdr_reserve_space(xdr, sizeof(u32) + pathname_len); - if (unlikely(p == NULL)) - return -EIO; + p = xdr_reserve_space(xdr, 4 + pathname_len); xdr_encode_opaque(p, pathname, pathname_len); - - return 0; } -static int mnt_enc_dirpath(struct rpc_rqst *req, __be32 *p, - const char *dirpath) +static void mnt_xdr_enc_dirpath(struct rpc_rqst *req, struct xdr_stream *xdr, + const char *dirpath) { - struct xdr_stream xdr; - - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - return encode_mntdirpath(&xdr, dirpath); + encode_mntdirpath(xdr, dirpath); } /* @@ -320,10 +326,10 @@ static int decode_status(struct xdr_stream *xdr, struct mountres *res) u32 status; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(status)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - status = ntohl(*p); + status = be32_to_cpup(p); for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) { if (mnt_errtbl[i].status == status) { @@ -351,18 +357,16 @@ static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res) return 0; } -static int mnt_dec_mountres(struct rpc_rqst *req, __be32 *p, - struct mountres *res) +static int mnt_xdr_dec_mountres(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct mountres *res) { - struct xdr_stream xdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - - status = decode_status(&xdr, res); + status = decode_status(xdr, res); if (unlikely(status != 0 || res->errno != 0)) return status; - return decode_fhandle(&xdr, res); + return decode_fhandle(xdr, res); } static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) @@ -371,10 +375,10 @@ static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) u32 status; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(status)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - status = ntohl(*p); + status = be32_to_cpup(p); for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) { if (mnt3_errtbl[i].status == status) { @@ -394,11 +398,11 @@ static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res) u32 size; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(size)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - size = ntohl(*p++); + size = be32_to_cpup(p); if (size > NFS3_FHSIZE || size == 0) return -EIO; @@ -421,15 +425,15 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) if (*count == 0) return 0; - p = xdr_inline_decode(xdr, sizeof(entries)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - entries = ntohl(*p); + entries = be32_to_cpup(p); dprintk("NFS: received %u auth flavors\n", entries); if (entries > NFS_MAX_SECFLAVORS) entries = NFS_MAX_SECFLAVORS; - p = xdr_inline_decode(xdr, sizeof(u32) * entries); + p = xdr_inline_decode(xdr, 4 * entries); if (unlikely(p == NULL)) return -EIO; @@ -437,7 +441,7 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) entries = *count; for (i = 0; i < entries; i++) { - flavors[i] = ntohl(*p++); + flavors[i] = be32_to_cpup(p++); dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]); } *count = i; @@ -445,30 +449,28 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) return 0; } -static int mnt_dec_mountres3(struct rpc_rqst *req, __be32 *p, - struct mountres *res) +static int mnt_xdr_dec_mountres3(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct mountres *res) { - struct xdr_stream xdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - - status = decode_fhs_status(&xdr, res); + status = decode_fhs_status(xdr, res); if (unlikely(status != 0 || res->errno != 0)) return status; - status = decode_fhandle3(&xdr, res); + status = decode_fhandle3(xdr, res); if (unlikely(status != 0)) { res->errno = -EBADHANDLE; return 0; } - return decode_auth_flavors(&xdr, res); + return decode_auth_flavors(xdr, res); } static struct rpc_procinfo mnt_procedures[] = { [MOUNTPROC_MNT] = { .p_proc = MOUNTPROC_MNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, - .p_decode = (kxdrproc_t)mnt_dec_mountres, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, + .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres, .p_arglen = MNT_enc_dirpath_sz, .p_replen = MNT_dec_mountres_sz, .p_statidx = MOUNTPROC_MNT, @@ -476,7 +478,7 @@ static struct rpc_procinfo mnt_procedures[] = { }, [MOUNTPROC_UMNT] = { .p_proc = MOUNTPROC_UMNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, .p_arglen = MNT_enc_dirpath_sz, .p_statidx = MOUNTPROC_UMNT, .p_name = "UMOUNT", @@ -486,8 +488,8 @@ static struct rpc_procinfo mnt_procedures[] = { static struct rpc_procinfo mnt3_procedures[] = { [MOUNTPROC3_MNT] = { .p_proc = MOUNTPROC3_MNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, - .p_decode = (kxdrproc_t)mnt_dec_mountres3, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, + .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres3, .p_arglen = MNT_enc_dirpath_sz, .p_replen = MNT_dec_mountres3_sz, .p_statidx = MOUNTPROC3_MNT, @@ -495,7 +497,7 @@ static struct rpc_procinfo mnt3_procedures[] = { }, [MOUNTPROC3_UMNT] = { .p_proc = MOUNTPROC3_UMNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, .p_arglen = MNT_enc_dirpath_sz, .p_statidx = MOUNTPROC3_UMNT, .p_name = "UMOUNT", @@ -503,19 +505,19 @@ static struct rpc_procinfo mnt3_procedures[] = { }; -static struct rpc_version mnt_version1 = { +static const struct rpc_version mnt_version1 = { .number = 1, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt_procedures), .procs = mnt_procedures, }; -static struct rpc_version mnt_version3 = { +static const struct rpc_version mnt_version3 = { .number = 3, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt3_procedures), .procs = mnt3_procedures, }; -static struct rpc_version *mnt_version[] = { +static const struct rpc_version *mnt_version[] = { NULL, &mnt_version1, NULL, @@ -524,7 +526,7 @@ static struct rpc_version *mnt_version[] = { static struct rpc_stat mnt_stats; -static struct rpc_program mnt_program = { +static const struct rpc_program mnt_program = { .name = "mount", .number = NFS_MNT_PROGRAM, .nrvers = ARRAY_SIZE(mnt_version), diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index db6aa3673cf..b5a0afc3ee1 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -7,6 +7,7 @@ * NFS namespace */ +#include <linux/module.h> #include <linux/dcache.h> #include <linux/gfp.h> #include <linux/mount.h> @@ -15,6 +16,7 @@ #include <linux/string.h> #include <linux/sunrpc/clnt.h> #include <linux/vfs.h> +#include <linux/sunrpc/gss_api.h> #include "internal.h" #define NFSDBG_FACILITY NFSDBG_VFS @@ -25,37 +27,45 @@ static LIST_HEAD(nfs_automount_list); static DECLARE_DELAYED_WORK(nfs_automount_task, nfs_expire_automounts); int nfs_mountpoint_expiry_timeout = 500 * HZ; -static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, - const struct dentry *dentry, - struct nfs_fh *fh, - struct nfs_fattr *fattr); - /* * nfs_path - reconstruct the path given an arbitrary dentry - * @base - arbitrary string to prepend to the path - * @droot - pointer to root dentry for mountpoint + * @base - used to return pointer to the end of devname part of path * @dentry - pointer to dentry * @buffer - result buffer * @buflen - length of buffer + * @flags - options (see below) * - * Helper function for constructing the path from the - * root dentry to an arbitrary hashed dentry. + * Helper function for constructing the server pathname + * by arbitrary hashed dentry. * * This is mainly for use in figuring out the path on the - * server side when automounting on top of an existing partition. + * server side when automounting on top of an existing partition + * and in generating /proc/mounts and friends. + * + * Supported flags: + * NFS_PATH_CANONICAL: ensure there is exactly one slash after + * the original device (export) name + * (if unset, the original name is returned verbatim) */ -char *nfs_path(const char *base, - const struct dentry *droot, - const struct dentry *dentry, - char *buffer, ssize_t buflen) +char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen, + unsigned flags) { - char *end = buffer+buflen; + char *end; int namelen; + unsigned seq; + const char *base; +rename_retry: + end = buffer+buflen; *--end = '\0'; buflen--; - spin_lock(&dcache_lock); - while (!IS_ROOT(dentry) && dentry != droot) { + + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); + while (1) { + spin_lock(&dentry->d_lock); + if (IS_ROOT(dentry)) + break; namelen = dentry->d_name.len; buflen -= namelen + 1; if (buflen < 0) @@ -63,34 +73,60 @@ char *nfs_path(const char *base, end -= namelen; memcpy(end, dentry->d_name.name, namelen); *--end = '/'; + spin_unlock(&dentry->d_lock); dentry = dentry->d_parent; } - spin_unlock(&dcache_lock); - if (*end != '/') { - if (--buflen < 0) + if (read_seqretry(&rename_lock, seq)) { + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); + goto rename_retry; + } + if ((flags & NFS_PATH_CANONICAL) && *end != '/') { + if (--buflen < 0) { + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); goto Elong; + } *--end = '/'; } + *p = end; + base = dentry->d_fsdata; + if (!base) { + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); + WARN_ON(1); + return end; + } namelen = strlen(base); - /* Strip off excess slashes in base string */ - while (namelen > 0 && base[namelen - 1] == '/') - namelen--; + if (flags & NFS_PATH_CANONICAL) { + /* Strip off excess slashes in base string */ + while (namelen > 0 && base[namelen - 1] == '/') + namelen--; + } buflen -= namelen; - if (buflen < 0) + if (buflen < 0) { + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); goto Elong; + } end -= namelen; memcpy(end, base, namelen); + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); return end; Elong_unlock: - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; Elong: return ERR_PTR(-ENAMETOOLONG); } +EXPORT_SYMBOL_GPL(nfs_path); /* - * nfs_follow_mountpoint - handle crossing a mountpoint on the server - * @dentry - dentry of mountpoint - * @nd - nameidata info + * nfs_d_automount - Handle crossing a mountpoint on the server + * @path - The mountpoint * * When we encounter a mountpoint on the server, we want to set up * a mountpoint on the client too, to prevent inode numbers from @@ -100,87 +136,72 @@ Elong: * situation, and that different filesystems may want to use * different security flavours. */ -static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) +struct vfsmount *nfs_d_automount(struct path *path) { struct vfsmount *mnt; - struct nfs_server *server = NFS_SERVER(dentry->d_inode); - struct dentry *parent; + struct nfs_server *server = NFS_SERVER(path->dentry->d_inode); struct nfs_fh *fh = NULL; struct nfs_fattr *fattr = NULL; - int err; - dprintk("--> nfs_follow_mountpoint()\n"); + dprintk("--> nfs_d_automount()\n"); - err = -ESTALE; - if (IS_ROOT(dentry)) - goto out_err; + mnt = ERR_PTR(-ESTALE); + if (IS_ROOT(path->dentry)) + goto out_nofree; - err = -ENOMEM; + mnt = ERR_PTR(-ENOMEM); fh = nfs_alloc_fhandle(); fattr = nfs_alloc_fattr(); if (fh == NULL || fattr == NULL) - goto out_err; + goto out; dprintk("%s: enter\n", __func__); - dput(nd->path.dentry); - nd->path.dentry = dget(dentry); - /* Look it up again */ - parent = dget_parent(nd->path.dentry); - err = server->nfs_client->rpc_ops->lookup(parent->d_inode, - &nd->path.dentry->d_name, - fh, fattr); - dput(parent); - if (err != 0) - goto out_err; - - if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) - mnt = nfs_do_refmount(nd->path.mnt, nd->path.dentry); - else - mnt = nfs_do_submount(nd->path.mnt, nd->path.dentry, fh, - fattr); - err = PTR_ERR(mnt); + mnt = server->nfs_client->rpc_ops->submount(server, path->dentry, fh, fattr); if (IS_ERR(mnt)) - goto out_err; + goto out; - mntget(mnt); - err = do_add_mount(mnt, &nd->path, nd->path.mnt->mnt_flags|MNT_SHRINKABLE, - &nfs_automount_list); - if (err < 0) { - mntput(mnt); - if (err == -EBUSY) - goto out_follow; - goto out_err; - } - path_put(&nd->path); - nd->path.mnt = mnt; - nd->path.dentry = dget(mnt->mnt_root); + dprintk("%s: done, success\n", __func__); + mntget(mnt); /* prevent immediate expiration */ + mnt_set_expiry(mnt, &nfs_automount_list); schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout); + out: nfs_free_fattr(fattr); nfs_free_fhandle(fh); - dprintk("%s: done, returned %d\n", __func__, err); +out_nofree: + if (IS_ERR(mnt)) + dprintk("<-- %s(): error %ld\n", __func__, PTR_ERR(mnt)); + else + dprintk("<-- %s() = %p\n", __func__, mnt); + return mnt; +} - dprintk("<-- nfs_follow_mountpoint() = %d\n", err); - return ERR_PTR(err); -out_err: - path_put(&nd->path); - goto out; -out_follow: - while (d_mountpoint(nd->path.dentry) && - follow_down(&nd->path)) - ; - err = 0; - goto out; +static int +nfs_namespace_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) +{ + if (NFS_FH(dentry->d_inode)->size != 0) + return nfs_getattr(mnt, dentry, stat); + generic_fillattr(dentry->d_inode, stat); + return 0; +} + +static int +nfs_namespace_setattr(struct dentry *dentry, struct iattr *attr) +{ + if (NFS_FH(dentry->d_inode)->size != 0) + return nfs_setattr(dentry, attr); + return -EACCES; } const struct inode_operations nfs_mountpoint_inode_operations = { - .follow_link = nfs_follow_mountpoint, .getattr = nfs_getattr, + .setattr = nfs_setattr, }; const struct inode_operations nfs_referral_inode_operations = { - .follow_link = nfs_follow_mountpoint, + .getattr = nfs_namespace_getattr, + .setattr = nfs_namespace_setattr, }; static void nfs_expire_automounts(struct work_struct *work) @@ -205,40 +226,26 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, const char *devname, struct nfs_clone_mount *mountdata) { -#ifdef CONFIG_NFS_V4 - struct vfsmount *mnt = ERR_PTR(-EINVAL); - switch (server->nfs_client->rpc_ops->version) { - case 2: - case 3: - mnt = vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata); - break; - case 4: - mnt = vfs_kern_mount(&nfs4_xdev_fs_type, 0, devname, mountdata); - } - return mnt; -#else return vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata); -#endif } /** * nfs_do_submount - set up mountpoint when crossing a filesystem boundary - * @mnt_parent - mountpoint of parent directory * @dentry - parent directory * @fh - filehandle for new root dentry * @fattr - attributes for new root inode + * @authflavor - security flavor to use when performing the mount * */ -static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, - const struct dentry *dentry, - struct nfs_fh *fh, - struct nfs_fattr *fattr) +struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh, + struct nfs_fattr *fattr, rpc_authflavor_t authflavor) { struct nfs_clone_mount mountdata = { - .sb = mnt_parent->mnt_sb, + .sb = dentry->d_sb, .dentry = dentry, .fh = fh, .fattr = fattr, + .authflavor = authflavor, }; struct vfsmount *mnt = ERR_PTR(-ENOMEM); char *page = (char *) __get_free_page(GFP_USER); @@ -246,16 +253,15 @@ static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, dprintk("--> nfs_do_submount()\n"); - dprintk("%s: submounting on %s/%s\n", __func__, - dentry->d_parent->d_name.name, - dentry->d_name.name); + dprintk("%s: submounting on %pd2\n", __func__, + dentry); if (page == NULL) goto out; - devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); + devname = nfs_devname(dentry, page, PAGE_SIZE); mnt = (struct vfsmount *)devname; if (IS_ERR(devname)) goto free_page; - mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata); + mnt = nfs_do_clone_mount(NFS_SB(dentry->d_sb), devname, &mountdata); free_page: free_page((unsigned long)page); out: @@ -264,3 +270,20 @@ out: dprintk("<-- nfs_do_submount() = %p\n", mnt); return mnt; } +EXPORT_SYMBOL_GPL(nfs_do_submount); + +struct vfsmount *nfs_submount(struct nfs_server *server, struct dentry *dentry, + struct nfs_fh *fh, struct nfs_fattr *fattr) +{ + int err; + struct dentry *parent = dget_parent(dentry); + + /* Look it up again to get its attributes */ + err = server->nfs_client->rpc_ops->lookup(parent->d_inode, &dentry->d_name, fh, fattr, NULL); + dput(parent); + if (err != 0) + return ERR_PTR(err); + + return nfs_do_submount(dentry, fh, fattr, server->client->cl_auth->au_flavor); +} +EXPORT_SYMBOL_GPL(nfs_submount); diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h new file mode 100644 index 00000000000..8ee1fab8326 --- /dev/null +++ b/fs/nfs/netns.h @@ -0,0 +1,36 @@ +/* + * NFS-private data for each "struct net". Accessed with net_generic(). + */ + +#ifndef __NFS_NETNS_H__ +#define __NFS_NETNS_H__ + +#include <linux/nfs4.h> +#include <net/net_namespace.h> +#include <net/netns/generic.h> + +struct bl_dev_msg { + int32_t status; + uint32_t major, minor; +}; + +struct nfs_net { + struct cache_detail *nfs_dns_resolve; + struct rpc_pipe *bl_device_pipe; + struct bl_dev_msg bl_mount_reply; + wait_queue_head_t bl_wq; + struct list_head nfs_client_list; + struct list_head nfs_volume_list; +#if IS_ENABLED(CONFIG_NFS_V4) + struct idr cb_ident_idr; /* Protected by nfs_client_lock */ + unsigned short nfs_callback_tcpport; + unsigned short nfs_callback_tcpport6; + int cb_users[NFS4_MAX_MINOR_VERSION + 1]; +#endif + spinlock_t nfs_client_lock; + struct timespec boot_time; +}; + +extern int nfs_net_id; + +#endif diff --git a/fs/nfs/nfs.h b/fs/nfs/nfs.h new file mode 100644 index 00000000000..43679df56cd --- /dev/null +++ b/fs/nfs/nfs.h @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2012 Netapp, Inc. All rights reserved. + * + * Function and structures exported by the NFS module + * for use by NFS version-specific modules. + */ +#ifndef __LINUX_INTERNAL_NFS_H +#define __LINUX_INTERNAL_NFS_H + +#include <linux/fs.h> +#include <linux/sunrpc/sched.h> +#include <linux/nfs_xdr.h> + +struct nfs_subversion { + struct module *owner; /* THIS_MODULE pointer */ + struct file_system_type *nfs_fs; /* NFS filesystem type */ + const struct rpc_version *rpc_vers; /* NFS version information */ + const struct nfs_rpc_ops *rpc_ops; /* NFS operations */ + const struct super_operations *sops; /* NFS Super operations */ + const struct xattr_handler **xattr; /* NFS xattr handlers */ + struct list_head list; /* List of NFS versions */ +}; + +struct nfs_subversion *get_nfs_version(unsigned int); +void put_nfs_version(struct nfs_subversion *); +void register_nfs_version(struct nfs_subversion *); +void unregister_nfs_version(struct nfs_subversion *); + +#endif /* __LINUX_INTERNAL_NFS_H */ diff --git a/fs/nfs/nfs2super.c b/fs/nfs/nfs2super.c new file mode 100644 index 00000000000..0a9782c9171 --- /dev/null +++ b/fs/nfs/nfs2super.c @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2012 Netapp, Inc. All rights reserved. + */ +#include <linux/module.h> +#include <linux/nfs_fs.h> +#include "internal.h" +#include "nfs.h" + +static struct nfs_subversion nfs_v2 = { + .owner = THIS_MODULE, + .nfs_fs = &nfs_fs_type, + .rpc_vers = &nfs_version2, + .rpc_ops = &nfs_v2_clientops, + .sops = &nfs_sops, +}; + +static int __init init_nfs_v2(void) +{ + register_nfs_version(&nfs_v2); + return 0; +} + +static void __exit exit_nfs_v2(void) +{ + unregister_nfs_version(&nfs_v2); +} + +MODULE_LICENSE("GPL"); + +module_init(init_nfs_v2); +module_exit(exit_nfs_v2); diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index e6bf45710cc..5f61b83f4a1 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -61,582 +61,998 @@ #define NFS_readdirres_sz (1) #define NFS_statfsres_sz (1+NFS_info_sz) +static int nfs_stat_to_errno(enum nfs_stat); + /* - * Common NFS XDR functions as inlines + * While encoding arguments, set up the reply buffer in advance to + * receive reply data directly into the page cache. */ -static inline __be32 * -xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fhandle) +static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, + unsigned int base, unsigned int len, + unsigned int bufsize) { - memcpy(p, fhandle->data, NFS2_FHSIZE); - return p + XDR_QUADLEN(NFS2_FHSIZE); -} + struct rpc_auth *auth = req->rq_cred->cr_auth; + unsigned int replen; -static inline __be32 * -xdr_decode_fhandle(__be32 *p, struct nfs_fh *fhandle) -{ - /* NFSv2 handles have a fixed length */ - fhandle->size = NFS2_FHSIZE; - memcpy(fhandle->data, p, NFS2_FHSIZE); - return p + XDR_QUADLEN(NFS2_FHSIZE); + replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; + xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); } -static inline __be32* -xdr_encode_time(__be32 *p, struct timespec *timep) +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { - *p++ = htonl(timep->tv_sec); - /* Convert nanoseconds into microseconds */ - *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0); - return p; + dprintk("NFS: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); } -static inline __be32* -xdr_encode_current_server_time(__be32 *p, struct timespec *timep) + +/* + * Encode/decode NFSv2 basic data types + * + * Basic NFSv2 data types are defined in section 2.3 of RFC 1094: + * "NFS: Network File System Protocol Specification". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. + */ + +/* + * typedef opaque nfsdata<>; + */ +static int decode_nfsdata(struct xdr_stream *xdr, struct nfs_pgio_res *result) { - /* - * Passing the invalid value useconds=1000000 is a - * Sun convention for "set to current server time". - * It's needed to make permissions checks for the - * "touch" program across v2 mounts to Solaris and - * Irix boxes work correctly. See description of - * sattr in section 6.1 of "NFS Illustrated" by - * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5 - */ - *p++ = htonl(timep->tv_sec); - *p++ = htonl(1000000); - return p; + u32 recvd, count; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + recvd = xdr_read_pages(xdr, count); + if (unlikely(count > recvd)) + goto out_cheating; +out: + result->eof = 0; /* NFSv2 does not pass EOF flag on the wire. */ + result->count = count; + return count; +out_cheating: + dprintk("NFS: server cheating in read result: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + goto out; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } -static inline __be32* -xdr_decode_time(__be32 *p, struct timespec *timep) +/* + * enum stat { + * NFS_OK = 0, + * NFSERR_PERM = 1, + * NFSERR_NOENT = 2, + * NFSERR_IO = 5, + * NFSERR_NXIO = 6, + * NFSERR_ACCES = 13, + * NFSERR_EXIST = 17, + * NFSERR_NODEV = 19, + * NFSERR_NOTDIR = 20, + * NFSERR_ISDIR = 21, + * NFSERR_FBIG = 27, + * NFSERR_NOSPC = 28, + * NFSERR_ROFS = 30, + * NFSERR_NAMETOOLONG = 63, + * NFSERR_NOTEMPTY = 66, + * NFSERR_DQUOT = 69, + * NFSERR_STALE = 70, + * NFSERR_WFLUSH = 99 + * }; + */ +static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status) { - timep->tv_sec = ntohl(*p++); - /* Convert microseconds into nanoseconds */ - timep->tv_nsec = ntohl(*p++) * 1000; - return p; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *status = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } -static __be32 * -xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) +/* + * 2.3.2. ftype + * + * enum ftype { + * NFNON = 0, + * NFREG = 1, + * NFDIR = 2, + * NFBLK = 3, + * NFCHR = 4, + * NFLNK = 5 + * }; + * + */ +static __be32 *xdr_decode_ftype(__be32 *p, u32 *type) { - u32 rdev, type; - type = ntohl(*p++); - fattr->mode = ntohl(*p++); - fattr->nlink = ntohl(*p++); - fattr->uid = ntohl(*p++); - fattr->gid = ntohl(*p++); - fattr->size = ntohl(*p++); - fattr->du.nfs2.blocksize = ntohl(*p++); - rdev = ntohl(*p++); - fattr->du.nfs2.blocks = ntohl(*p++); - fattr->fsid.major = ntohl(*p++); - fattr->fsid.minor = 0; - fattr->fileid = ntohl(*p++); - p = xdr_decode_time(p, &fattr->atime); - p = xdr_decode_time(p, &fattr->mtime); - p = xdr_decode_time(p, &fattr->ctime); - fattr->valid |= NFS_ATTR_FATTR_V2; - fattr->rdev = new_decode_dev(rdev); - if (type == NFCHR && rdev == NFS2_FIFO_DEV) { - fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; - fattr->rdev = 0; - } + *type = be32_to_cpup(p++); + if (unlikely(*type > NF2FIFO)) + *type = NFBAD; return p; } -static inline __be32 * -xdr_encode_sattr(__be32 *p, struct iattr *attr) +/* + * 2.3.3. fhandle + * + * typedef opaque fhandle[FHSIZE]; + */ +static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh) { - const __be32 not_set = __constant_htonl(0xFFFFFFFF); - - *p++ = (attr->ia_valid & ATTR_MODE) ? htonl(attr->ia_mode) : not_set; - *p++ = (attr->ia_valid & ATTR_UID) ? htonl(attr->ia_uid) : not_set; - *p++ = (attr->ia_valid & ATTR_GID) ? htonl(attr->ia_gid) : not_set; - *p++ = (attr->ia_valid & ATTR_SIZE) ? htonl(attr->ia_size) : not_set; - - if (attr->ia_valid & ATTR_ATIME_SET) { - p = xdr_encode_time(p, &attr->ia_atime); - } else if (attr->ia_valid & ATTR_ATIME) { - p = xdr_encode_current_server_time(p, &attr->ia_atime); - } else { - *p++ = not_set; - *p++ = not_set; - } + __be32 *p; - if (attr->ia_valid & ATTR_MTIME_SET) { - p = xdr_encode_time(p, &attr->ia_mtime); - } else if (attr->ia_valid & ATTR_MTIME) { - p = xdr_encode_current_server_time(p, &attr->ia_mtime); - } else { - *p++ = not_set; - *p++ = not_set; - } - return p; + p = xdr_reserve_space(xdr, NFS2_FHSIZE); + memcpy(p, fh->data, NFS2_FHSIZE); } -/* - * NFS encode functions - */ -/* - * Encode file handle argument - * GETATTR, READLINK, STATFS - */ -static int -nfs_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) +static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh) { - p = xdr_encode_fhandle(p, fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + __be32 *p; + + p = xdr_inline_decode(xdr, NFS2_FHSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + fh->size = NFS2_FHSIZE; + memcpy(fh->data, p, NFS2_FHSIZE); return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } /* - * Encode SETATTR arguments + * 2.3.4. timeval + * + * struct timeval { + * unsigned int seconds; + * unsigned int useconds; + * }; */ -static int -nfs_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs_sattrargs *args) +static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + *p++ = cpu_to_be32(timep->tv_sec); + if (timep->tv_nsec != 0) + *p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC); + else + *p++ = cpu_to_be32(0); + return p; } /* - * Encode directory ops argument - * LOOKUP, RMDIR + * Passing the invalid value useconds=1000000 is a Sun convention for + * "set to current server time". It's needed to make permissions checks + * for the "touch" program across v2 mounts to Solaris and Irix servers + * work correctly. See description of sattr in section 6.1 of "NFS + * Illustrated" by Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5. */ -static int -nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args) +static __be32 *xdr_encode_current_server_time(__be32 *p, + const struct timespec *timep) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + *p++ = cpu_to_be32(timep->tv_sec); + *p++ = cpu_to_be32(1000000); + return p; } -/* - * Encode REMOVE argument - */ -static int -nfs_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name.name, args->name.len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + timep->tv_sec = be32_to_cpup(p++); + timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC; + return p; } /* - * Arguments to a READ call. Since we read data directly into the page - * cache, we also set up the reply iovec here so that iov[1] points - * exactly to the page we want to fetch. + * 2.3.5. fattr + * + * struct fattr { + * ftype type; + * unsigned int mode; + * unsigned int nlink; + * unsigned int uid; + * unsigned int gid; + * unsigned int size; + * unsigned int blocksize; + * unsigned int rdev; + * unsigned int blocks; + * unsigned int fsid; + * unsigned int fileid; + * timeval atime; + * timeval mtime; + * timeval ctime; + * }; + * */ -static int -nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) +static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 offset = (u32)args->offset; - u32 count = args->count; + u32 rdev, type; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(offset); - *p++ = htonl(count); - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + p = xdr_inline_decode(xdr, NFS_fattr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + + fattr->valid |= NFS_ATTR_FATTR_V2; + + p = xdr_decode_ftype(p, &type); + + fattr->mode = be32_to_cpup(p++); + fattr->nlink = be32_to_cpup(p++); + fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++)); + if (!uid_valid(fattr->uid)) + goto out_uid; + fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++)); + if (!gid_valid(fattr->gid)) + goto out_gid; + + fattr->size = be32_to_cpup(p++); + fattr->du.nfs2.blocksize = be32_to_cpup(p++); + + rdev = be32_to_cpup(p++); + fattr->rdev = new_decode_dev(rdev); + if (type == (u32)NFCHR && rdev == (u32)NFS2_FIFO_DEV) { + fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; + fattr->rdev = 0; + } + + fattr->du.nfs2.blocks = be32_to_cpup(p++); + fattr->fsid.major = be32_to_cpup(p++); + fattr->fsid.minor = 0; + fattr->fileid = be32_to_cpup(p++); + + p = xdr_decode_time(p, &fattr->atime); + p = xdr_decode_time(p, &fattr->mtime); + xdr_decode_time(p, &fattr->ctime); + fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, - args->pages, args->pgbase, count); - req->rq_rcv_buf.flags |= XDRBUF_READ; return 0; +out_uid: + dprintk("NFS: returned invalid uid\n"); + return -EINVAL; +out_gid: + dprintk("NFS: returned invalid gid\n"); + return -EINVAL; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } /* - * Decode READ reply + * 2.3.6. sattr + * + * struct sattr { + * unsigned int mode; + * unsigned int uid; + * unsigned int gid; + * unsigned int size; + * timeval atime; + * timeval mtime; + * }; */ -static int -nfs_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) -{ - struct kvec *iov = req->rq_rcv_buf.head; - size_t hdrlen; - u32 count, recvd; - int status; - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - p = xdr_decode_fattr(p, res->fattr); +#define NFS2_SATTR_NOT_SET (0xffffffff) - count = ntohl(*p++); - res->eof = 0; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READ reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READ header is short. iovec will be shifted.\n"); - xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); - } +static __be32 *xdr_time_not_set(__be32 *p) +{ + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + return p; +} - recvd = req->rq_rcv_buf.len - hdrlen; - if (count > recvd) { - dprintk("NFS: server cheating in read reply: " - "count %u > recvd %u\n", count, recvd); - count = recvd; - } +static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr) +{ + __be32 *p; - dprintk("RPC: readres OK count %u\n", count); - if (count < res->count) - res->count = count; + p = xdr_reserve_space(xdr, NFS_sattr_sz << 2); - return count; -} + if (attr->ia_valid & ATTR_MODE) + *p++ = cpu_to_be32(attr->ia_mode); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_UID) + *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid)); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_GID) + *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid)); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_SIZE) + *p++ = cpu_to_be32((u32)attr->ia_size); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_ATIME_SET) + p = xdr_encode_time(p, &attr->ia_atime); + else if (attr->ia_valid & ATTR_ATIME) + p = xdr_encode_current_server_time(p, &attr->ia_atime); + else + p = xdr_time_not_set(p); + if (attr->ia_valid & ATTR_MTIME_SET) + xdr_encode_time(p, &attr->ia_mtime); + else if (attr->ia_valid & ATTR_MTIME) + xdr_encode_current_server_time(p, &attr->ia_mtime); + else + xdr_time_not_set(p); +} /* - * Write arguments. Splice the buffer to be written into the iovec. + * 2.3.7. filename + * + * typedef string filename<MAXNAMLEN>; */ -static int -nfs_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void encode_filename(struct xdr_stream *xdr, + const char *name, u32 length) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - u32 offset = (u32)args->offset; - u32 count = args->count; + __be32 *p; + + WARN_ON_ONCE(length > NFS2_MAXNAMLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); +} - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(offset); - *p++ = htonl(offset); - *p++ = htonl(count); - *p++ = htonl(count); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); +static int decode_filename_inline(struct xdr_stream *xdr, + const char **name, u32 *length) +{ + __be32 *p; + u32 count; - /* Copy the page array */ - xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); - sndbuf->flags |= XDRBUF_WRITE; + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (count > NFS3_MAXNAMLEN) + goto out_nametoolong; + p = xdr_inline_decode(xdr, count); + if (unlikely(p == NULL)) + goto out_overflow; + *name = (const char *)p; + *length = count; return 0; +out_nametoolong: + dprintk("NFS: returned filename too long: %u\n", count); + return -ENAMETOOLONG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } /* - * Encode create arguments - * CREATE, MKDIR + * 2.3.8. path + * + * typedef string path<MAXPATHLEN>; */ -static int -nfs_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs_createargs *args) +static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + __be32 *p; + + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(length); + xdr_write_pages(xdr, pages, 0, length); +} + +static int decode_path(struct xdr_stream *xdr) +{ + u32 length, recvd; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p); + if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN)) + goto out_size; + recvd = xdr_read_pages(xdr, length); + if (unlikely(length > recvd)) + goto out_cheating; + xdr_terminate_string(xdr->buf, length); return 0; +out_size: + dprintk("NFS: returned pathname too long: %u\n", length); + return -ENAMETOOLONG; +out_cheating: + dprintk("NFS: server cheating in pathname result: " + "length %u > received %u\n", length, recvd); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } /* - * Encode RENAME arguments + * 2.3.9. attrstat + * + * union attrstat switch (stat status) { + * case NFS_OK: + * fattr attributes; + * default: + * void; + * }; */ -static int -nfs_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) +static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result) { - p = xdr_encode_fhandle(p, args->old_dir); - p = xdr_encode_array(p, args->old_name->name, args->old_name->len); - p = xdr_encode_fhandle(p, args->new_dir); - p = xdr_encode_array(p, args->new_name->name, args->new_name->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_fattr(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Encode LINK arguments + * 2.3.10. diropargs + * + * struct diropargs { + * fhandle dir; + * filename name; + * }; */ -static int -nfs_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs_linkargs *args) +static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh, + const char *name, u32 length) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_fhandle(p, args->tofh); - p = xdr_encode_array(p, args->toname, args->tolen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_fhandle(xdr, fh); + encode_filename(xdr, name, length); } /* - * Encode SYMLINK arguments + * 2.3.11. diropres + * + * union diropres switch (stat status) { + * case NFS_OK: + * struct { + * fhandle file; + * fattr attributes; + * } diropok; + * default: + * void; + * }; */ -static int -nfs_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_symlinkargs *args) +static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - size_t pad; + int error; + + error = decode_fhandle(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_fattr(xdr, result->fattr); +out: + return error; +} - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_array(p, args->fromname, args->fromlen); - *p++ = htonl(args->pathlen); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); +static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_diropok(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - xdr_encode_pages(sndbuf, args->pages, 0, args->pathlen); - /* - * xdr_encode_pages may have added a few bytes to ensure the - * pathname ends on a 4-byte boundary. Start encoding the - * attributes after the pad bytes. - */ - pad = sndbuf->tail->iov_len; - if (pad > 0) - p++; - p = xdr_encode_sattr(p, args->sattr); - sndbuf->len += xdr_adjust_iovec(sndbuf->tail, p) - pad; - return 0; +/* + * NFSv2 XDR encode functions + * + * NFSv2 argument types are defined in section 2.2 of RFC 1094: + * "NFS: Network File System Protocol Specification". + */ + +static void nfs2_xdr_enc_fhandle(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_fh *fh) +{ + encode_fhandle(xdr, fh); } /* - * Encode arguments to readdir call + * 2.2.3. sattrargs + * + * struct sattrargs { + * fhandle file; + * sattr attributes; + * }; */ -static int -nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args) +static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_sattrargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; + encode_fhandle(xdr, args->fh); + encode_sattr(xdr, args->sattr); +} - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->cookie); - *p++ = htonl(count); /* see above */ - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); +static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_diropargs *args) +{ + encode_diropargs(xdr, args->fh, args->name, args->len); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); - return 0; +static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readlinkargs *args) +{ + encode_fhandle(xdr, args->fh); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->pglen, NFS_readlinkres_sz); } /* - * Decode the result of a readdir call. - * We're not really decoding anymore, we just leave the buffer untouched - * and only check that it is syntactically correct. - * The real decoding happens in nfs_decode_entry below, called directly - * from nfs_readdir for each entry. + * 2.2.7. readargs + * + * struct readargs { + * fhandle file; + * unsigned offset; + * unsigned count; + * unsigned totalcount; + * }; */ -static int -nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy) +static void encode_readargs(struct xdr_stream *xdr, + const struct nfs_pgio_args *args) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - struct page **page; - size_t hdrlen; - unsigned int pglen, recvd; - int status, nr = 0; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); + u32 offset = args->offset; + u32 count = args->count; + __be32 *p; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READDIR reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } + encode_fhandle(xdr, args->fh); - pglen = rcvbuf->page_len; - recvd = rcvbuf->len - hdrlen; - if (pglen > recvd) - pglen = recvd; - page = rcvbuf->pages; - return nr; + p = xdr_reserve_space(xdr, 4 + 4 + 4); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(count); + *p = cpu_to_be32(count); } -static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +static void nfs2_xdr_enc_readargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_pgio_args *args) { - dprintk("nfs: %s: prematurely hit end of receive buffer. " - "Remaining buffer length is %tu words.\n", - func, xdr->end - xdr->p); + encode_readargs(xdr, args); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->count, NFS_readres_sz); + req->rq_rcv_buf.flags |= XDRBUF_READ; } -__be32 * -nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) +/* + * 2.2.9. writeargs + * + * struct writeargs { + * fhandle file; + * unsigned beginoffset; + * unsigned offset; + * unsigned totalcount; + * nfsdata data; + * }; + */ +static void encode_writeargs(struct xdr_stream *xdr, + const struct nfs_pgio_args *args) { + u32 offset = args->offset; + u32 count = args->count; __be32 *p; - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) { - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); - entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); - } - p = xdr_inline_decode(xdr, 8); - if (unlikely(!p)) - goto out_overflow; + encode_fhandle(xdr, args->fh); - entry->ino = ntohl(*p++); - entry->len = ntohl(*p++); + p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(count); - p = xdr_inline_decode(xdr, entry->len + 4); - if (unlikely(!p)) - goto out_overflow; - entry->name = (const char *) p; - p += XDR_QUADLEN(entry->len); - entry->prev_cookie = entry->cookie; - entry->cookie = ntohl(*p++); - - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; - - return p; + /* nfsdata */ + *p = cpu_to_be32(count); + xdr_write_pages(xdr, args->pages, args->pgbase, count); +} -out_overflow: - print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); +static void nfs2_xdr_enc_writeargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_pgio_args *args) +{ + encode_writeargs(xdr, args); + xdr->buf->flags |= XDRBUF_WRITE; } /* - * NFS XDR decode functions + * 2.2.10. createargs + * + * struct createargs { + * diropargs where; + * sattr attributes; + * }; */ +static void nfs2_xdr_enc_createargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_createargs *args) +{ + encode_diropargs(xdr, args->fh, args->name, args->len); + encode_sattr(xdr, args->sattr); +} + +static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_removeargs *args) +{ + encode_diropargs(xdr, args->fh, args->name.name, args->name.len); +} + /* - * Decode simple status reply + * 2.2.12. renameargs + * + * struct renameargs { + * diropargs from; + * diropargs to; + * }; */ -static int -nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy) +static void nfs2_xdr_enc_renameargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - int status; + const struct qstr *old = args->old_name; + const struct qstr *new = args->new_name; - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - return status; + encode_diropargs(xdr, args->old_dir, old->name, old->len); + encode_diropargs(xdr, args->new_dir, new->name, new->len); } /* - * Decode attrstat reply - * GETATTR, SETATTR, WRITE + * 2.2.13. linkargs + * + * struct linkargs { + * fhandle from; + * diropargs to; + * }; */ -static int -nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static void nfs2_xdr_enc_linkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_linkargs *args) { - int status; + encode_fhandle(xdr, args->fromfh); + encode_diropargs(xdr, args->tofh, args->toname, args->tolen); +} - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - xdr_decode_fattr(p, fattr); - return 0; +/* + * 2.2.14. symlinkargs + * + * struct symlinkargs { + * diropargs from; + * path to; + * sattr attributes; + * }; + */ +static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_symlinkargs *args) +{ + encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen); + encode_path(xdr, args->pages, args->pathlen); + encode_sattr(xdr, args->sattr); } /* - * Decode diropres reply - * LOOKUP, CREATE, MKDIR + * 2.2.17. readdirargs + * + * struct readdirargs { + * fhandle dir; + * nfscookie cookie; + * unsigned count; + * }; */ -static int -nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res) +static void encode_readdirargs(struct xdr_stream *xdr, + const struct nfs_readdirargs *args) { - int status; + __be32 *p; - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - p = xdr_decode_fhandle(p, res->fh); - xdr_decode_fattr(p, res->fattr); - return 0; + encode_fhandle(xdr, args->fh); + + p = xdr_reserve_space(xdr, 4 + 4); + *p++ = cpu_to_be32(args->cookie); + *p = cpu_to_be32(args->count); +} + +static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readdirargs *args) +{ + encode_readdirargs(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS_readdirres_sz); } /* - * Encode READLINK args + * NFSv2 XDR decode functions + * + * NFSv2 result types are defined in section 2.2 of RFC 1094: + * "NFS: Network File System Protocol Specification". */ -static int -nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args) + +static int nfs2_xdr_dec_stat(struct rpc_rqst *req, struct xdr_stream *xdr, + void *__unused) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - p = xdr_encode_fhandle(p, args->fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); +static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_fattr *result) +{ + return decode_attrstat(xdr, result); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); - return 0; +static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_diropok *result) +{ + return decode_diropres(xdr, result); +} + +/* + * 2.2.6. readlinkres + * + * union readlinkres switch (stat status) { + * case NFS_OK: + * path data; + * default: + * void; + * }; + */ +static int nfs2_xdr_dec_readlinkres(struct rpc_rqst *req, + struct xdr_stream *xdr, void *__unused) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_path(xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Decode READLINK reply + * 2.2.7. readres + * + * union readres switch (stat status) { + * case NFS_OK: + * fattr attributes; + * nfsdata data; + * default: + * void; + * }; */ -static int -nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy) +static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_res *result) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; - u32 len, recvd; - int status; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_fattr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_nfsdata(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - /* Convert length of symlink */ - len = ntohl(*p++); - if (len >= rcvbuf->page_len) { - dprintk("nfs: server returned giant symlink!\n"); - return -ENAMETOOLONG; - } - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READLINK reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } - recvd = req->rq_rcv_buf.len - hdrlen; - if (recvd < len) { - dprintk("NFS: server cheating in readlink reply: " - "count %u > recvd %u\n", len, recvd); - return -EIO; +static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_res *result) +{ + /* All NFSv2 writes are "file sync" writes */ + result->verf->committed = NFS_FILE_SYNC; + return decode_attrstat(xdr, result->fattr); +} + +/** + * nfs2_decode_dirent - Decode a single NFSv2 directory entry stored in + * the local page cache. + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + * + * 2.2.17. entry + * + * struct entry { + * unsigned fileid; + * filename name; + * nfscookie cookie; + * entry *nextentry; + * }; + */ +int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) +{ + __be32 *p; + int error; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p++ == xdr_zero) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p++ == xdr_zero) + return -EAGAIN; + entry->eof = 1; + return -EBADCOOKIE; } - xdr_terminate_string(rcvbuf, len); + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + entry->ino = be32_to_cpup(p); + + error = decode_filename_inline(xdr, &entry->name, &entry->len); + if (unlikely(error)) + return error; + + /* + * The type (size and byte order) of nfscookie isn't defined in + * RFC 1094. This implementation assumes that it's an XDR uint32. + */ + entry->prev_cookie = entry->cookie; + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + entry->cookie = be32_to_cpup(p); + + entry->d_type = DT_UNKNOWN; + return 0; + +out_overflow: + print_overflow_msg(__func__, xdr); + return -EAGAIN; } /* - * Decode WRITE reply + * 2.2.17. readdirres + * + * union readdirres switch (stat status) { + * case NFS_OK: + * struct { + * entry *entries; + * bool eof; + * } readdirok; + * default: + * void; + * }; + * + * Read the directory contents into the page cache, but don't + * touch them. The actual decoding is done by nfs2_decode_dirent() + * during subsequent nfs_readdir() calls. */ -static int -nfs_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) +static int decode_readdirok(struct xdr_stream *xdr) { - res->verf->committed = NFS_FILE_SYNC; - return nfs_xdr_attrstat(req, p, res->fattr); + return xdr_read_pages(xdr, xdr->buf->page_len); +} + +static int nfs2_xdr_dec_readdirres(struct rpc_rqst *req, + struct xdr_stream *xdr, void *__unused) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_readdirok(xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Decode STATFS reply + * 2.2.18. statfsres + * + * union statfsres (stat status) { + * case NFS_OK: + * struct { + * unsigned tsize; + * unsigned bsize; + * unsigned blocks; + * unsigned bfree; + * unsigned bavail; + * } info; + * default: + * void; + * }; */ -static int -nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res) +static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result) { - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); + __be32 *p; - res->tsize = ntohl(*p++); - res->bsize = ntohl(*p++); - res->blocks = ntohl(*p++); - res->bfree = ntohl(*p++); - res->bavail = ntohl(*p++); + p = xdr_inline_decode(xdr, NFS_info_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + result->tsize = be32_to_cpup(p++); + result->bsize = be32_to_cpup(p++); + result->blocks = be32_to_cpup(p++); + result->bfree = be32_to_cpup(p++); + result->bavail = be32_to_cpup(p); return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } +static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs2_fsstat *result) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_info(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + + /* * We need to translate between nfs status return values and * the local errno values which may not be the same. */ -static struct { +static const struct { int stat; int errno; } nfs_errtbl[] = { @@ -676,28 +1092,30 @@ static struct { { -1, -EIO } }; -/* - * Convert an NFS error code to a local one. - * This one is used jointly by NFSv2 and NFSv3. +/** + * nfs_stat_to_errno - convert an NFS status code to a local errno + * @status: NFS status code to convert + * + * Returns a local errno value, or -EIO if the NFS status code is + * not recognized. This function is used jointly by NFSv2 and NFSv3. */ -int -nfs_stat_to_errno(int stat) +static int nfs_stat_to_errno(enum nfs_stat status) { int i; for (i = 0; nfs_errtbl[i].stat != -1; i++) { - if (nfs_errtbl[i].stat == stat) + if (nfs_errtbl[i].stat == (int)status) return nfs_errtbl[i].errno; } - dprintk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat); + dprintk("NFS: Unrecognized nfs status value: %u\n", status); return nfs_errtbl[i].errno; } #define PROC(proc, argtype, restype, timer) \ [NFSPROC_##proc] = { \ .p_proc = NFSPROC_##proc, \ - .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs_xdr_##restype, \ + .p_encode = (kxdreproc_t)nfs2_xdr_enc_##argtype, \ + .p_decode = (kxdrdproc_t)nfs2_xdr_dec_##restype, \ .p_arglen = NFS_##argtype##_sz, \ .p_replen = NFS_##restype##_sz, \ .p_timer = timer, \ @@ -705,24 +1123,24 @@ nfs_stat_to_errno(int stat) .p_name = #proc, \ } struct rpc_procinfo nfs_procedures[] = { - PROC(GETATTR, fhandle, attrstat, 1), - PROC(SETATTR, sattrargs, attrstat, 0), - PROC(LOOKUP, diropargs, diropres, 2), - PROC(READLINK, readlinkargs, readlinkres, 3), - PROC(READ, readargs, readres, 3), - PROC(WRITE, writeargs, writeres, 4), - PROC(CREATE, createargs, diropres, 0), - PROC(REMOVE, removeargs, stat, 0), - PROC(RENAME, renameargs, stat, 0), - PROC(LINK, linkargs, stat, 0), - PROC(SYMLINK, symlinkargs, stat, 0), - PROC(MKDIR, createargs, diropres, 0), - PROC(RMDIR, diropargs, stat, 0), - PROC(READDIR, readdirargs, readdirres, 3), - PROC(STATFS, fhandle, statfsres, 0), + PROC(GETATTR, fhandle, attrstat, 1), + PROC(SETATTR, sattrargs, attrstat, 0), + PROC(LOOKUP, diropargs, diropres, 2), + PROC(READLINK, readlinkargs, readlinkres, 3), + PROC(READ, readargs, readres, 3), + PROC(WRITE, writeargs, writeres, 4), + PROC(CREATE, createargs, diropres, 0), + PROC(REMOVE, removeargs, stat, 0), + PROC(RENAME, renameargs, stat, 0), + PROC(LINK, linkargs, stat, 0), + PROC(SYMLINK, symlinkargs, stat, 0), + PROC(MKDIR, createargs, diropres, 0), + PROC(RMDIR, diropargs, stat, 0), + PROC(READDIR, readdirargs, readdirres, 3), + PROC(STATFS, fhandle, statfsres, 0), }; -struct rpc_version nfs_version2 = { +const struct rpc_version nfs_version2 = { .number = 2, .nrprocs = ARRAY_SIZE(nfs_procedures), .procs = nfs_procedures diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c index 9f88c5f4c7e..8f854dde415 100644 --- a/fs/nfs/nfs3acl.c +++ b/fs/nfs/nfs3acl.c @@ -10,179 +10,7 @@ #define NFSDBG_FACILITY NFSDBG_PROC -ssize_t nfs3_listxattr(struct dentry *dentry, char *buffer, size_t size) -{ - struct inode *inode = dentry->d_inode; - struct posix_acl *acl; - int pos=0, len=0; - -# define output(s) do { \ - if (pos + sizeof(s) <= size) { \ - memcpy(buffer + pos, s, sizeof(s)); \ - pos += sizeof(s); \ - } \ - len += sizeof(s); \ - } while(0) - - acl = nfs3_proc_getacl(inode, ACL_TYPE_ACCESS); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl) { - output("system.posix_acl_access"); - posix_acl_release(acl); - } - - if (S_ISDIR(inode->i_mode)) { - acl = nfs3_proc_getacl(inode, ACL_TYPE_DEFAULT); - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl) { - output("system.posix_acl_default"); - posix_acl_release(acl); - } - } - -# undef output - - if (!buffer || len <= size) - return len; - return -ERANGE; -} - -ssize_t nfs3_getxattr(struct dentry *dentry, const char *name, - void *buffer, size_t size) -{ - struct inode *inode = dentry->d_inode; - struct posix_acl *acl; - int type, error = 0; - - if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) - type = ACL_TYPE_ACCESS; - else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) - type = ACL_TYPE_DEFAULT; - else - return -EOPNOTSUPP; - - acl = nfs3_proc_getacl(inode, type); - if (IS_ERR(acl)) - return PTR_ERR(acl); - else if (acl) { - if (type == ACL_TYPE_ACCESS && acl->a_count == 0) - error = -ENODATA; - else - error = posix_acl_to_xattr(acl, buffer, size); - posix_acl_release(acl); - } else - error = -ENODATA; - - return error; -} - -int nfs3_setxattr(struct dentry *dentry, const char *name, - const void *value, size_t size, int flags) -{ - struct inode *inode = dentry->d_inode; - struct posix_acl *acl; - int type, error; - - if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) - type = ACL_TYPE_ACCESS; - else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) - type = ACL_TYPE_DEFAULT; - else - return -EOPNOTSUPP; - - acl = posix_acl_from_xattr(value, size); - if (IS_ERR(acl)) - return PTR_ERR(acl); - error = nfs3_proc_setacl(inode, type, acl); - posix_acl_release(acl); - - return error; -} - -int nfs3_removexattr(struct dentry *dentry, const char *name) -{ - struct inode *inode = dentry->d_inode; - int type; - - if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) - type = ACL_TYPE_ACCESS; - else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) - type = ACL_TYPE_DEFAULT; - else - return -EOPNOTSUPP; - - return nfs3_proc_setacl(inode, type, NULL); -} - -static void __nfs3_forget_cached_acls(struct nfs_inode *nfsi) -{ - if (!IS_ERR(nfsi->acl_access)) { - posix_acl_release(nfsi->acl_access); - nfsi->acl_access = ERR_PTR(-EAGAIN); - } - if (!IS_ERR(nfsi->acl_default)) { - posix_acl_release(nfsi->acl_default); - nfsi->acl_default = ERR_PTR(-EAGAIN); - } -} - -void nfs3_forget_cached_acls(struct inode *inode) -{ - dprintk("NFS: nfs3_forget_cached_acls(%s/%ld)\n", inode->i_sb->s_id, - inode->i_ino); - spin_lock(&inode->i_lock); - __nfs3_forget_cached_acls(NFS_I(inode)); - spin_unlock(&inode->i_lock); -} - -static struct posix_acl *nfs3_get_cached_acl(struct inode *inode, int type) -{ - struct nfs_inode *nfsi = NFS_I(inode); - struct posix_acl *acl = ERR_PTR(-EINVAL); - - spin_lock(&inode->i_lock); - switch(type) { - case ACL_TYPE_ACCESS: - acl = nfsi->acl_access; - break; - - case ACL_TYPE_DEFAULT: - acl = nfsi->acl_default; - break; - - default: - goto out; - } - if (IS_ERR(acl)) - acl = ERR_PTR(-EAGAIN); - else - acl = posix_acl_dup(acl); -out: - spin_unlock(&inode->i_lock); - dprintk("NFS: nfs3_get_cached_acl(%s/%ld, %d) = %p\n", inode->i_sb->s_id, - inode->i_ino, type, acl); - return acl; -} - -static void nfs3_cache_acls(struct inode *inode, struct posix_acl *acl, - struct posix_acl *dfacl) -{ - struct nfs_inode *nfsi = NFS_I(inode); - - dprintk("nfs3_cache_acls(%s/%ld, %p, %p)\n", inode->i_sb->s_id, - inode->i_ino, acl, dfacl); - spin_lock(&inode->i_lock); - __nfs3_forget_cached_acls(NFS_I(inode)); - if (!IS_ERR(acl)) - nfsi->acl_access = posix_acl_dup(acl); - if (!IS_ERR(dfacl)) - nfsi->acl_default = posix_acl_dup(dfacl); - spin_unlock(&inode->i_lock); -} - -struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) +struct posix_acl *nfs3_get_acl(struct inode *inode, int type) { struct nfs_server *server = NFS_SERVER(inode); struct page *pages[NFSACL_MAXPAGES] = { }; @@ -192,13 +20,12 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) .pages = pages, }; struct nfs3_getaclres res = { - 0 + NULL, }; struct rpc_message msg = { .rpc_argp = &args, .rpc_resp = &res, }; - struct posix_acl *acl; int status, count; if (!nfs_server_capable(inode, NFS_CAP_ACLS)) @@ -207,10 +34,6 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) status = nfs_revalidate_inode(server, inode); if (status < 0) return ERR_PTR(status); - acl = nfs3_get_cached_acl(inode, type); - if (acl != ERR_PTR(-EAGAIN)) - return acl; - acl = NULL; /* * Only get the access acl when explicitly requested: We don't @@ -257,40 +80,41 @@ struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type) } if (res.acl_access != NULL) { - if (posix_acl_equiv_mode(res.acl_access, NULL) == 0) { + if ((posix_acl_equiv_mode(res.acl_access, NULL) == 0) || + res.acl_access->a_count == 0) { posix_acl_release(res.acl_access); res.acl_access = NULL; } } - nfs3_cache_acls(inode, - (res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL), - (res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL)); - switch(type) { - case ACL_TYPE_ACCESS: - acl = res.acl_access; - res.acl_access = NULL; - break; + if (res.mask & NFS_ACL) + set_cached_acl(inode, ACL_TYPE_ACCESS, res.acl_access); + else + forget_cached_acl(inode, ACL_TYPE_ACCESS); - case ACL_TYPE_DEFAULT: - acl = res.acl_default; - res.acl_default = NULL; + if (res.mask & NFS_DFACL) + set_cached_acl(inode, ACL_TYPE_DEFAULT, res.acl_default); + else + forget_cached_acl(inode, ACL_TYPE_DEFAULT); + + nfs_free_fattr(res.fattr); + if (type == ACL_TYPE_ACCESS) { + posix_acl_release(res.acl_default); + return res.acl_access; + } else { + posix_acl_release(res.acl_access); + return res.acl_default; } getout: posix_acl_release(res.acl_access); posix_acl_release(res.acl_default); nfs_free_fattr(res.fattr); - - if (status != 0) { - posix_acl_release(acl); - acl = ERR_PTR(status); - } - return acl; + return ERR_PTR(status); } -static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, - struct posix_acl *dfacl) +static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, + struct posix_acl *dfacl) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_fattr *fattr; @@ -311,8 +135,8 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, if (!nfs_server_capable(inode, NFS_CAP_ACLS)) goto out; - /* We are doing this here, because XDR marshalling can only - return -ENOMEM. */ + /* We are doing this here because XDR marshalling does not + * return any results, it BUGs. */ status = -ENOSPC; if (acl != NULL && acl->a_count > NFS_ACL_MAX_ENTRIES) goto out; @@ -353,7 +177,8 @@ static int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, switch (status) { case 0: status = nfs_refresh_inode(inode, fattr); - nfs3_cache_acls(inode, acl, dfacl); + set_cached_acl(inode, ACL_TYPE_ACCESS, acl); + set_cached_acl(inode, ACL_TYPE_DEFAULT, dfacl); break; case -EPFNOSUPPORT: case -EPROTONOSUPPORT: @@ -373,40 +198,43 @@ out: return status; } -int nfs3_proc_setacl(struct inode *inode, int type, struct posix_acl *acl) +int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl, + struct posix_acl *dfacl) +{ + int ret; + ret = __nfs3_proc_setacls(inode, acl, dfacl); + return (ret == -EOPNOTSUPP) ? 0 : ret; + +} + +int nfs3_set_acl(struct inode *inode, struct posix_acl *acl, int type) { struct posix_acl *alloc = NULL, *dfacl = NULL; int status; if (S_ISDIR(inode->i_mode)) { switch(type) { - case ACL_TYPE_ACCESS: - alloc = dfacl = nfs3_proc_getacl(inode, - ACL_TYPE_DEFAULT); - if (IS_ERR(alloc)) - goto fail; - break; - - case ACL_TYPE_DEFAULT: - dfacl = acl; - alloc = acl = nfs3_proc_getacl(inode, - ACL_TYPE_ACCESS); - if (IS_ERR(alloc)) - goto fail; - break; - - default: - return -EINVAL; + case ACL_TYPE_ACCESS: + alloc = dfacl = get_acl(inode, ACL_TYPE_DEFAULT); + if (IS_ERR(alloc)) + goto fail; + break; + + case ACL_TYPE_DEFAULT: + dfacl = acl; + alloc = acl = get_acl(inode, ACL_TYPE_ACCESS); + if (IS_ERR(alloc)) + goto fail; + break; } - } else if (type != ACL_TYPE_ACCESS) - return -EINVAL; + } if (acl == NULL) { alloc = acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); if (IS_ERR(alloc)) goto fail; } - status = nfs3_proc_setacls(inode, acl, dfacl); + status = __nfs3_proc_setacls(inode, acl, dfacl); posix_acl_release(alloc); return status; @@ -414,31 +242,51 @@ fail: return PTR_ERR(alloc); } -int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode, - mode_t mode) +const struct xattr_handler *nfs3_xattr_handlers[] = { + &posix_acl_access_xattr_handler, + &posix_acl_default_xattr_handler, + NULL, +}; + +static int +nfs3_list_one_acl(struct inode *inode, int type, const char *name, void *data, + size_t size, ssize_t *result) { - struct posix_acl *dfacl, *acl; - int error = 0; + struct posix_acl *acl; + char *p = data + *result; - dfacl = nfs3_proc_getacl(dir, ACL_TYPE_DEFAULT); - if (IS_ERR(dfacl)) { - error = PTR_ERR(dfacl); - return (error == -EOPNOTSUPP) ? 0 : error; - } - if (!dfacl) - return 0; - acl = posix_acl_clone(dfacl, GFP_KERNEL); - error = -ENOMEM; + acl = get_acl(inode, type); if (!acl) - goto out_release_dfacl; - error = posix_acl_create_masq(acl, &mode); - if (error < 0) - goto out_release_acl; - error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ? - dfacl : NULL); -out_release_acl: + return 0; + posix_acl_release(acl); -out_release_dfacl: - posix_acl_release(dfacl); - return error; + + *result += strlen(name); + *result += 1; + if (!size) + return 0; + if (*result > size) + return -ERANGE; + + strcpy(p, name); + return 0; +} + +ssize_t +nfs3_listxattr(struct dentry *dentry, char *data, size_t size) +{ + struct inode *inode = dentry->d_inode; + ssize_t result = 0; + int error; + + error = nfs3_list_one_acl(inode, ACL_TYPE_ACCESS, + POSIX_ACL_XATTR_ACCESS, data, size, &result); + if (error) + return error; + + error = nfs3_list_one_acl(inode, ACL_TYPE_DEFAULT, + POSIX_ACL_XATTR_DEFAULT, data, size, &result); + if (error) + return error; + return result; } diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c new file mode 100644 index 00000000000..b3fc65ef39c --- /dev/null +++ b/fs/nfs/nfs3client.c @@ -0,0 +1,65 @@ +#include <linux/nfs_fs.h> +#include <linux/nfs_mount.h> +#include "internal.h" + +#ifdef CONFIG_NFS_V3_ACL +static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; +static const struct rpc_version *nfsacl_version[] = { + [3] = &nfsacl_version3, +}; + +const struct rpc_program nfsacl_program = { + .name = "nfsacl", + .number = NFS_ACL_PROGRAM, + .nrvers = ARRAY_SIZE(nfsacl_version), + .version = nfsacl_version, + .stats = &nfsacl_rpcstat, +}; + +/* + * Initialise an NFSv3 ACL client connection + */ +static void nfs_init_server_aclclient(struct nfs_server *server) +{ + if (server->flags & NFS_MOUNT_NOACL) + goto out_noacl; + + server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); + if (IS_ERR(server->client_acl)) + goto out_noacl; + + /* No errors! Assume that Sun nfsacls are supported */ + server->caps |= NFS_CAP_ACLS; + return; + +out_noacl: + server->caps &= ~NFS_CAP_ACLS; +} +#else +static inline void nfs_init_server_aclclient(struct nfs_server *server) +{ + server->flags &= ~NFS_MOUNT_NOACL; + server->caps &= ~NFS_CAP_ACLS; +} +#endif + +struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) +{ + struct nfs_server *server = nfs_create_server(mount_info, nfs_mod); + /* Create a client RPC handle for the NFS v3 ACL management interface */ + if (!IS_ERR(server)) + nfs_init_server_aclclient(server); + return server; +} + +struct nfs_server *nfs3_clone_server(struct nfs_server *source, + struct nfs_fh *fh, + struct nfs_fattr *fattr, + rpc_authflavor_t flavor) +{ + struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor); + if (!IS_ERR(server) && !IS_ERR(source->client_acl)) + nfs_init_server_aclclient(server); + return server; +} diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index ce939c062a5..f0afa291fd5 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -17,22 +17,24 @@ #include <linux/nfs_page.h> #include <linux/lockd/bind.h> #include <linux/nfs_mount.h> +#include <linux/freezer.h> +#include <linux/xattr.h> #include "iostat.h" #include "internal.h" #define NFSDBG_FACILITY NFSDBG_PROC -/* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */ +/* A wrapper to handle the EJUKEBOX error messages */ static int nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) { int res; do { res = rpc_call_sync(clnt, msg, flags); - if (res != -EJUKEBOX && res != -EKEYEXPIRED) + if (res != -EJUKEBOX) break; - schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); + freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME); res = -ERESTARTSYS; } while (!fatal_signal_pending(current)); return res; @@ -43,7 +45,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) static int nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) { - if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED) + if (task->tk_status != -EJUKEBOX) return 0; if (task->tk_status == -EJUKEBOX) nfs_inc_stats(inode, NFSIOS_DELAY); @@ -68,7 +70,7 @@ do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, nfs_fattr_init(info->fattr); status = rpc_call_sync(client, &msg, 0); dprintk("%s: reply fsinfo: %d\n", __func__, status); - if (!(info->fattr->valid & NFS_ATTR_FATTR)) { + if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) { msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; msg.rpc_resp = info->fattr; status = rpc_call_sync(client, &msg, 0); @@ -97,7 +99,7 @@ nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, */ static int nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, - struct nfs_fattr *fattr) + struct nfs_fattr *fattr, struct nfs4_label *label) { struct rpc_message msg = { .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], @@ -142,7 +144,8 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, static int nfs3_proc_lookup(struct inode *dir, struct qstr *name, - struct nfs_fh *fhandle, struct nfs_fattr *fattr) + struct nfs_fh *fhandle, struct nfs_fattr *fattr, + struct nfs4_label *label) { struct nfs3_diropargs arg = { .fh = NFS_FH(dir), @@ -299,7 +302,7 @@ static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_ status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); nfs_post_op_update_inode(dir, data->res.dir_attr); if (status == 0) - status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); + status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); return status; } @@ -313,13 +316,13 @@ static void nfs3_free_createdata(struct nfs3_createdata *data) */ static int nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags, struct nfs_open_context *ctx) + int flags) { + struct posix_acl *default_acl, *acl; struct nfs3_createdata *data; - mode_t mode = sattr->ia_mode; int status = -ENOMEM; - dprintk("NFS call create %s\n", dentry->d_name.name); + dprintk("NFS call create %pd\n", dentry); data = nfs3_alloc_createdata(); if (data == NULL) @@ -334,11 +337,13 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, data->arg.create.createmode = NFS3_CREATE_UNCHECKED; if (flags & O_EXCL) { data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; - data->arg.create.verifier[0] = jiffies; - data->arg.create.verifier[1] = current->pid; + data->arg.create.verifier[0] = cpu_to_be32(jiffies); + data->arg.create.verifier[1] = cpu_to_be32(current->pid); } - sattr->ia_mode &= ~current_umask(); + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; for (;;) { status = nfs3_do_create(dir, dentry, data); @@ -364,7 +369,7 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, } if (status != 0) - goto out; + goto out_release_acls; /* When we created the file with exclusive semantics, make * sure we set the attributes afterwards. */ @@ -383,9 +388,14 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, nfs_post_op_update_inode(dentry->d_inode, data->res.fattr); dprintk("NFS reply setattr (post-create): %d\n", status); if (status != 0) - goto out; + goto out_release_acls; } - status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); + + status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl); + +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); out: nfs3_free_createdata(data); dprintk("NFS reply create: %d\n", status); @@ -397,8 +407,7 @@ nfs3_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_removeargs arg = { .fh = NFS_FH(dir), - .name.len = name->len, - .name.name = name->name, + .name = *name, }; struct nfs_removeres res; struct rpc_message msg = { @@ -427,6 +436,11 @@ nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; } +static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) +{ + rpc_call_start(task); +} + static int nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) { @@ -444,6 +458,11 @@ nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir) msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; } +static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) +{ + rpc_call_start(task); +} + static int nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) @@ -460,41 +479,6 @@ nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, } static int -nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, - struct inode *new_dir, struct qstr *new_name) -{ - struct nfs_renameargs arg = { - .old_dir = NFS_FH(old_dir), - .old_name = old_name, - .new_dir = NFS_FH(new_dir), - .new_name = new_name, - }; - struct nfs_renameres res; - struct rpc_message msg = { - .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME], - .rpc_argp = &arg, - .rpc_resp = &res, - }; - int status = -ENOMEM; - - dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); - - res.old_fattr = nfs_alloc_fattr(); - res.new_fattr = nfs_alloc_fattr(); - if (res.old_fattr == NULL || res.new_fattr == NULL) - goto out; - - status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); - nfs_post_op_update_inode(old_dir, res.old_fattr); - nfs_post_op_update_inode(new_dir, res.new_fattr); -out: - nfs_free_fattr(res.old_fattr); - nfs_free_fattr(res.new_fattr); - dprintk("NFS reply rename: %d\n", status); - return status; -} - -static int nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs3_linkargs arg = { @@ -537,7 +521,7 @@ nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, if (len > NFS3_MAXPATHLEN) return -ENAMETOOLONG; - dprintk("NFS call symlink %s\n", dentry->d_name.name); + dprintk("NFS call symlink %pd\n", dentry); data = nfs3_alloc_createdata(); if (data == NULL) @@ -561,18 +545,20 @@ out: static int nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { + struct posix_acl *default_acl, *acl; struct nfs3_createdata *data; - int mode = sattr->ia_mode; int status = -ENOMEM; - dprintk("NFS call mkdir %s\n", dentry->d_name.name); - - sattr->ia_mode &= ~current_umask(); + dprintk("NFS call mkdir %pd\n", dentry); data = nfs3_alloc_createdata(); if (data == NULL) goto out; + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; data->arg.mkdir.fh = NFS_FH(dir); data->arg.mkdir.name = dentry->d_name.name; @@ -581,9 +567,13 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) status = nfs3_do_create(dir, dentry, data); if (status != 0) - goto out; + goto out_release_acls; + + status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl); - status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); out: nfs3_free_createdata(data); dprintk("NFS reply mkdir: %d\n", status); @@ -633,7 +623,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, u64 cookie, struct page **pages, unsigned int count, int plus) { struct inode *dir = dentry->d_inode; - __be32 *verf = NFS_COOKIEVERF(dir); + __be32 *verf = NFS_I(dir)->cookieverf; struct nfs3_readdirargs arg = { .fh = NFS_FH(dir), .cookie = cookie, @@ -680,19 +670,21 @@ static int nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { + struct posix_acl *default_acl, *acl; struct nfs3_createdata *data; - mode_t mode = sattr->ia_mode; int status = -ENOMEM; - dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name, + dprintk("NFS call mknod %pd %u:%u\n", dentry, MAJOR(rdev), MINOR(rdev)); - sattr->ia_mode &= ~current_umask(); - data = nfs3_alloc_createdata(); if (data == NULL) goto out; + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; data->arg.mknod.fh = NFS_FH(dir); data->arg.mknod.name = dentry->d_name.name; @@ -720,8 +712,13 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, status = nfs3_do_create(dir, dentry, data); if (status != 0) - goto out; - status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode); + goto out_release_acls; + + status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl); + +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); out: nfs3_free_createdata(data); dprintk("NFS reply mknod: %d\n", status); @@ -798,36 +795,51 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return status; } -static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data) +static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_data *data) { - if (nfs3_async_handle_jukebox(task, data->inode)) + struct inode *inode = data->header->inode; + + if (nfs3_async_handle_jukebox(task, inode)) return -EAGAIN; - nfs_invalidate_atime(data->inode); - nfs_refresh_inode(data->inode, &data->fattr); + nfs_invalidate_atime(inode); + nfs_refresh_inode(inode, &data->fattr); return 0; } -static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) +static void nfs3_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; } -static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data) +static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data) { - if (nfs3_async_handle_jukebox(task, data->inode)) + rpc_call_start(task); + return 0; +} + +static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_data *data) +{ + struct inode *inode = data->header->inode; + + if (nfs3_async_handle_jukebox(task, inode)) return -EAGAIN; if (task->tk_status >= 0) - nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); + nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); return 0; } -static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) +static void nfs3_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; } -static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) +static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) +{ + rpc_call_start(task); +} + +static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) { if (nfs3_async_handle_jukebox(task, data->inode)) return -EAGAIN; @@ -835,7 +847,7 @@ static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data) return 0; } -static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) +static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; } @@ -843,17 +855,68 @@ static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_messa static int nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { - struct inode *inode = filp->f_path.dentry->d_inode; + struct inode *inode = file_inode(filp); return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); } +static int nfs3_have_delegation(struct inode *inode, fmode_t flags) +{ + return 0; +} + +static int nfs3_return_delegation(struct inode *inode) +{ + nfs_wb_all(inode); + return 0; +} + +static const struct inode_operations nfs3_dir_inode_operations = { + .create = nfs_create, + .lookup = nfs_lookup, + .link = nfs_link, + .unlink = nfs_unlink, + .symlink = nfs_symlink, + .mkdir = nfs_mkdir, + .rmdir = nfs_rmdir, + .mknod = nfs_mknod, + .rename = nfs_rename, + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +#ifdef CONFIG_NFS_V3_ACL + .listxattr = nfs3_listxattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .removexattr = generic_removexattr, + .get_acl = nfs3_get_acl, + .set_acl = nfs3_set_acl, +#endif +}; + +static const struct inode_operations nfs3_file_inode_operations = { + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +#ifdef CONFIG_NFS_V3_ACL + .listxattr = nfs3_listxattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .removexattr = generic_removexattr, + .get_acl = nfs3_get_acl, + .set_acl = nfs3_set_acl, +#endif +}; + const struct nfs_rpc_ops nfs_v3_clientops = { .version = 3, /* protocol version */ .dentry_ops = &nfs_dentry_operations, .dir_inode_ops = &nfs3_dir_inode_operations, .file_inode_ops = &nfs3_file_inode_operations, + .file_ops = &nfs_file_operations, .getroot = nfs3_proc_get_root, + .submount = nfs_submount, + .try_mount = nfs_try_mount, .getattr = nfs3_proc_getattr, .setattr = nfs3_proc_setattr, .lookup = nfs3_proc_lookup, @@ -862,9 +925,10 @@ const struct nfs_rpc_ops nfs_v3_clientops = { .create = nfs3_proc_create, .remove = nfs3_proc_remove, .unlink_setup = nfs3_proc_unlink_setup, + .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, .unlink_done = nfs3_proc_unlink_done, - .rename = nfs3_proc_rename, .rename_setup = nfs3_proc_rename_setup, + .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, .rename_done = nfs3_proc_rename_done, .link = nfs3_proc_link, .symlink = nfs3_proc_symlink, @@ -876,13 +940,22 @@ const struct nfs_rpc_ops nfs_v3_clientops = { .fsinfo = nfs3_proc_fsinfo, .pathconf = nfs3_proc_pathconf, .decode_dirent = nfs3_decode_dirent, + .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, .read_setup = nfs3_proc_read_setup, .read_done = nfs3_read_done, .write_setup = nfs3_proc_write_setup, .write_done = nfs3_write_done, .commit_setup = nfs3_proc_commit_setup, + .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, .commit_done = nfs3_commit_done, .lock = nfs3_proc_lock, - .clear_acl_cache = nfs3_forget_cached_acls, + .clear_acl_cache = forget_all_cached_acls, .close_context = nfs_close_context, + .have_delegation = nfs3_have_delegation, + .return_delegation = nfs3_return_delegation, + .alloc_client = nfs_alloc_client, + .init_client = nfs_init_client, + .free_client = nfs_free_client, + .create_server = nfs3_create_server, + .clone_server = nfs3_clone_server, }; diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c new file mode 100644 index 00000000000..d6a98949af1 --- /dev/null +++ b/fs/nfs/nfs3super.c @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2012 Netapp, Inc. All rights reserved. + */ +#include <linux/module.h> +#include <linux/nfs_fs.h> +#include "internal.h" +#include "nfs.h" + +static struct nfs_subversion nfs_v3 = { + .owner = THIS_MODULE, + .nfs_fs = &nfs_fs_type, + .rpc_vers = &nfs_version3, + .rpc_ops = &nfs_v3_clientops, + .sops = &nfs_sops, +#ifdef CONFIG_NFS_V3_ACL + .xattr = nfs3_xattr_handlers, +#endif +}; + +static int __init init_nfs_v3(void) +{ + register_nfs_version(&nfs_v3); + return 0; +} + +static void __exit exit_nfs_v3(void) +{ + unregister_nfs_version(&nfs_v3); +} + +MODULE_LICENSE("GPL"); + +module_init(init_nfs_v3); +module_exit(exit_nfs_v3); diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index d9a5e832c25..8f4cbe7f4aa 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -37,18 +37,16 @@ #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) #define NFS3_fattr_sz (21) -#define NFS3_wcc_attr_sz (6) +#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) +#define NFS3_wcc_attr_sz (6) #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) -#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) -#define NFS3_fsstat_sz -#define NFS3_fsinfo_sz -#define NFS3_pathconf_sz -#define NFS3_entry_sz (NFS3_filename_sz+3) - -#define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) +#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) -#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) + +#define NFS3_getattrargs_sz (NFS3_fh_sz) +#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) +#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_accessargs_sz (NFS3_fh_sz+1) #define NFS3_readlinkargs_sz (NFS3_fh_sz) #define NFS3_readargs_sz (NFS3_fh_sz+3) @@ -57,14 +55,16 @@ #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) +#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) -#define NFS3_readdirargs_sz (NFS3_fh_sz+2) +#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) +#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) #define NFS3_commitargs_sz (NFS3_fh_sz+3) -#define NFS3_attrstat_sz (1+NFS3_fattr_sz) -#define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) -#define NFS3_removeres_sz (NFS3_wccstat_sz) +#define NFS3_getattrres_sz (1+NFS3_fattr_sz) +#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) +#define NFS3_removeres_sz (NFS3_setattrres_sz) #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) @@ -86,6 +86,8 @@ XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) +static int nfs3_stat_to_errno(enum nfs_stat); + /* * Map file type to S_IFMT bits */ @@ -100,1080 +102,2424 @@ static const umode_t nfs_type2fmt[] = { [NF3FIFO] = S_IFIFO, }; +/* + * While encoding arguments, set up the reply buffer in advance to + * receive reply data directly into the page cache. + */ +static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, + unsigned int base, unsigned int len, + unsigned int bufsize) +{ + struct rpc_auth *auth = req->rq_cred->cr_auth; + unsigned int replen; + + replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; + xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); +} + +/* + * Handle decode buffer overflows out-of-line. + */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { - dprintk("nfs: %s: prematurely hit end of receive buffer. " + dprintk("NFS: %s prematurely hit the end of our receive buffer. " "Remaining buffer length is %tu words.\n", func, xdr->end - xdr->p); } + /* - * Common NFS XDR functions as inlines + * Encode/decode NFSv3 basic data types + * + * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: + * "NFS Version 3 Protocol Specification". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. */ -static inline __be32 * -xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh) + +static void encode_uint32(struct xdr_stream *xdr, u32 value) { - return xdr_encode_array(p, fh->data, fh->size); + __be32 *p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(value); } -static inline __be32 * -xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) +static int decode_uint32(struct xdr_stream *xdr, u32 *value) { - if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { - memcpy(fh->data, p, fh->size); - return p + XDR_QUADLEN(fh->size); - } - return NULL; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *value = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_uint64(struct xdr_stream *xdr, u64 *value) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(p == NULL)) + goto out_overflow; + xdr_decode_hyper(p, value); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * fileid3 + * + * typedef uint64 fileid3; + */ +static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) +{ + return xdr_decode_hyper(p, fileid); +} + +static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) +{ + return decode_uint64(xdr, fileid); +} + +/* + * filename3 + * + * typedef string filename3<>; + */ +static void encode_filename3(struct xdr_stream *xdr, + const char *name, u32 length) +{ + __be32 *p; + + WARN_ON_ONCE(length > NFS3_MAXNAMLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); } -static inline __be32 * -xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh) +static int decode_inline_filename3(struct xdr_stream *xdr, + const char **name, u32 *length) { __be32 *p; + u32 count; + p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) goto out_overflow; - fh->size = ntohl(*p++); + count = be32_to_cpup(p); + if (count > NFS3_MAXNAMLEN) + goto out_nametoolong; + p = xdr_inline_decode(xdr, count); + if (unlikely(p == NULL)) + goto out_overflow; + *name = (const char *)p; + *length = count; + return 0; - if (fh->size <= NFS3_FHSIZE) { - p = xdr_inline_decode(xdr, fh->size); - if (unlikely(!p)) - goto out_overflow; - memcpy(fh->data, p, fh->size); - return p + XDR_QUADLEN(fh->size); - } - return NULL; +out_nametoolong: + dprintk("NFS: returned filename too long: %u\n", count); + return -ENAMETOOLONG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * nfspath3 + * + * typedef string nfspath3<>; + */ +static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, + const u32 length) +{ + encode_uint32(xdr, length); + xdr_write_pages(xdr, pages, 0, length); +} +static int decode_nfspath3(struct xdr_stream *xdr) +{ + u32 recvd, count; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) + goto out_nametoolong; + recvd = xdr_read_pages(xdr, count); + if (unlikely(count > recvd)) + goto out_cheating; + xdr_terminate_string(xdr->buf, count); + return 0; + +out_nametoolong: + dprintk("NFS: returned pathname too long: %u\n", count); + return -ENAMETOOLONG; +out_cheating: + dprintk("NFS: server cheating in pathname result: " + "count %u > recvd %u\n", count, recvd); + return -EIO; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EIO; } /* - * Encode/decode time. + * cookie3 + * + * typedef uint64 cookie3 */ -static inline __be32 * -xdr_encode_time3(__be32 *p, struct timespec *timep) +static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) { - *p++ = htonl(timep->tv_sec); - *p++ = htonl(timep->tv_nsec); - return p; + return xdr_encode_hyper(p, cookie); } -static inline __be32 * -xdr_decode_time3(__be32 *p, struct timespec *timep) +static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) { - timep->tv_sec = ntohl(*p++); - timep->tv_nsec = ntohl(*p++); - return p; + return decode_uint64(xdr, cookie); +} + +/* + * cookieverf3 + * + * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; + */ +static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) +{ + memcpy(p, verifier, NFS3_COOKIEVERFSIZE); + return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); +} + +static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier, p, NFS3_COOKIEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * createverf3 + * + * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; + */ +static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); + memcpy(p, verifier, NFS3_CREATEVERFSIZE); +} + +static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier->data, p, NFS3_WRITEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * size3 + * + * typedef uint64 size3; + */ +static __be32 *xdr_decode_size3(__be32 *p, u64 *size) +{ + return xdr_decode_hyper(p, size); +} + +/* + * nfsstat3 + * + * enum nfsstat3 { + * NFS3_OK = 0, + * ... + * } + */ +#define NFS3_OK NFS_OK + +static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *status = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * ftype3 + * + * enum ftype3 { + * NF3REG = 1, + * NF3DIR = 2, + * NF3BLK = 3, + * NF3CHR = 4, + * NF3LNK = 5, + * NF3SOCK = 6, + * NF3FIFO = 7 + * }; + */ +static void encode_ftype3(struct xdr_stream *xdr, const u32 type) +{ + encode_uint32(xdr, type); } -static __be32 * -xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) +static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) { - unsigned int type, major, minor; - umode_t fmode; + u32 type; - type = ntohl(*p++); + type = be32_to_cpup(p++); if (type > NF3FIFO) type = NF3NON; - fmode = nfs_type2fmt[type]; - fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; - fattr->nlink = ntohl(*p++); - fattr->uid = ntohl(*p++); - fattr->gid = ntohl(*p++); - p = xdr_decode_hyper(p, &fattr->size); - p = xdr_decode_hyper(p, &fattr->du.nfs3.used); - - /* Turn remote device info into Linux-specific dev_t */ - major = ntohl(*p++); - minor = ntohl(*p++); - fattr->rdev = MKDEV(major, minor); - if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) - fattr->rdev = 0; + *mode = nfs_type2fmt[type]; + return p; +} - p = xdr_decode_hyper(p, &fattr->fsid.major); - fattr->fsid.minor = 0; - p = xdr_decode_hyper(p, &fattr->fileid); - p = xdr_decode_time3(p, &fattr->atime); - p = xdr_decode_time3(p, &fattr->mtime); - p = xdr_decode_time3(p, &fattr->ctime); +/* + * specdata3 + * + * struct specdata3 { + * uint32 specdata1; + * uint32 specdata2; + * }; + */ +static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) +{ + __be32 *p; - /* Update the mode bits */ - fattr->valid |= NFS_ATTR_FATTR_V3; + p = xdr_reserve_space(xdr, 8); + *p++ = cpu_to_be32(MAJOR(rdev)); + *p = cpu_to_be32(MINOR(rdev)); +} + +static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) +{ + unsigned int major, minor; + + major = be32_to_cpup(p++); + minor = be32_to_cpup(p++); + *rdev = MKDEV(major, minor); + if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) + *rdev = 0; return p; } -static inline __be32 * -xdr_encode_sattr(__be32 *p, struct iattr *attr) +/* + * nfs_fh3 + * + * struct nfs_fh3 { + * opaque data<NFS3_FHSIZE>; + * }; + */ +static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) { + __be32 *p; + + WARN_ON_ONCE(fh->size > NFS3_FHSIZE); + p = xdr_reserve_space(xdr, 4 + fh->size); + xdr_encode_opaque(p, fh->data, fh->size); +} + +static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + if (unlikely(length > NFS3_FHSIZE)) + goto out_toobig; + p = xdr_inline_decode(xdr, length); + if (unlikely(p == NULL)) + goto out_overflow; + fh->size = length; + memcpy(fh->data, p, length); + return 0; +out_toobig: + dprintk("NFS: file handle size (%u) too big\n", length); + return -E2BIG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static void zero_nfs_fh3(struct nfs_fh *fh) +{ + memset(fh, 0, sizeof(*fh)); +} + +/* + * nfstime3 + * + * struct nfstime3 { + * uint32 seconds; + * uint32 nseconds; + * }; + */ +static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) +{ + *p++ = cpu_to_be32(timep->tv_sec); + *p++ = cpu_to_be32(timep->tv_nsec); + return p; +} + +static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) +{ + timep->tv_sec = be32_to_cpup(p++); + timep->tv_nsec = be32_to_cpup(p++); + return p; +} + +/* + * sattr3 + * + * enum time_how { + * DONT_CHANGE = 0, + * SET_TO_SERVER_TIME = 1, + * SET_TO_CLIENT_TIME = 2 + * }; + * + * union set_mode3 switch (bool set_it) { + * case TRUE: + * mode3 mode; + * default: + * void; + * }; + * + * union set_uid3 switch (bool set_it) { + * case TRUE: + * uid3 uid; + * default: + * void; + * }; + * + * union set_gid3 switch (bool set_it) { + * case TRUE: + * gid3 gid; + * default: + * void; + * }; + * + * union set_size3 switch (bool set_it) { + * case TRUE: + * size3 size; + * default: + * void; + * }; + * + * union set_atime switch (time_how set_it) { + * case SET_TO_CLIENT_TIME: + * nfstime3 atime; + * default: + * void; + * }; + * + * union set_mtime switch (time_how set_it) { + * case SET_TO_CLIENT_TIME: + * nfstime3 mtime; + * default: + * void; + * }; + * + * struct sattr3 { + * set_mode3 mode; + * set_uid3 uid; + * set_gid3 gid; + * set_size3 size; + * set_atime atime; + * set_mtime mtime; + * }; + */ +static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) +{ + u32 nbytes; + __be32 *p; + + /* + * In order to make only a single xdr_reserve_space() call, + * pre-compute the total number of bytes to be reserved. + * Six boolean values, one for each set_foo field, are always + * present in the encoded result, so start there. + */ + nbytes = 6 * 4; + if (attr->ia_valid & ATTR_MODE) + nbytes += 4; + if (attr->ia_valid & ATTR_UID) + nbytes += 4; + if (attr->ia_valid & ATTR_GID) + nbytes += 4; + if (attr->ia_valid & ATTR_SIZE) + nbytes += 8; + if (attr->ia_valid & ATTR_ATIME_SET) + nbytes += 8; + if (attr->ia_valid & ATTR_MTIME_SET) + nbytes += 8; + p = xdr_reserve_space(xdr, nbytes); + if (attr->ia_valid & ATTR_MODE) { *p++ = xdr_one; - *p++ = htonl(attr->ia_mode & S_IALLUGO); - } else { + *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_UID) { *p++ = xdr_one; - *p++ = htonl(attr->ia_uid); - } else { + *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid)); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_GID) { *p++ = xdr_one; - *p++ = htonl(attr->ia_gid); - } else { + *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid)); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_SIZE) { *p++ = xdr_one; - p = xdr_encode_hyper(p, (__u64) attr->ia_size); - } else { + p = xdr_encode_hyper(p, (u64)attr->ia_size); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_ATIME_SET) { *p++ = xdr_two; - p = xdr_encode_time3(p, &attr->ia_atime); + p = xdr_encode_nfstime3(p, &attr->ia_atime); } else if (attr->ia_valid & ATTR_ATIME) { *p++ = xdr_one; - } else { + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_MTIME_SET) { *p++ = xdr_two; - p = xdr_encode_time3(p, &attr->ia_mtime); + xdr_encode_nfstime3(p, &attr->ia_mtime); } else if (attr->ia_valid & ATTR_MTIME) { - *p++ = xdr_one; - } else { - *p++ = xdr_zero; - } - return p; + *p = xdr_one; + } else + *p = xdr_zero; } -static inline __be32 * -xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) +/* + * fattr3 + * + * struct fattr3 { + * ftype3 type; + * mode3 mode; + * uint32 nlink; + * uid3 uid; + * gid3 gid; + * size3 size; + * size3 used; + * specdata3 rdev; + * uint64 fsid; + * fileid3 fileid; + * nfstime3 atime; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) { - p = xdr_decode_hyper(p, &fattr->pre_size); - p = xdr_decode_time3(p, &fattr->pre_mtime); - p = xdr_decode_time3(p, &fattr->pre_ctime); + umode_t fmode; + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + + p = xdr_decode_ftype3(p, &fmode); + + fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; + fattr->nlink = be32_to_cpup(p++); + fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++)); + if (!uid_valid(fattr->uid)) + goto out_uid; + fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++)); + if (!gid_valid(fattr->gid)) + goto out_gid; + + p = xdr_decode_size3(p, &fattr->size); + p = xdr_decode_size3(p, &fattr->du.nfs3.used); + p = xdr_decode_specdata3(p, &fattr->rdev); + + p = xdr_decode_hyper(p, &fattr->fsid.major); + fattr->fsid.minor = 0; + + p = xdr_decode_fileid3(p, &fattr->fileid); + p = xdr_decode_nfstime3(p, &fattr->atime); + p = xdr_decode_nfstime3(p, &fattr->mtime); + xdr_decode_nfstime3(p, &fattr->ctime); + fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); + + fattr->valid |= NFS_ATTR_FATTR_V3; + return 0; +out_uid: + dprintk("NFS: returned invalid uid\n"); + return -EINVAL; +out_gid: + dprintk("NFS: returned invalid gid\n"); + return -EINVAL; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * post_op_attr + * + * union post_op_attr switch (bool attributes_follow) { + * case TRUE: + * fattr3 attributes; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_fattr3(xdr, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * wcc_attr + * struct wcc_attr { + * size3 size; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + fattr->valid |= NFS_ATTR_FATTR_PRESIZE + | NFS_ATTR_FATTR_PRECHANGE | NFS_ATTR_FATTR_PREMTIME | NFS_ATTR_FATTR_PRECTIME; - return p; -} -static inline __be32 * -xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) -{ - if (*p++) - p = xdr_decode_fattr(p, fattr); - return p; + p = xdr_decode_size3(p, &fattr->pre_size); + p = xdr_decode_nfstime3(p, &fattr->pre_mtime); + xdr_decode_nfstime3(p, &fattr->pre_ctime); + fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); + + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } -static inline __be32 * -xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr) +/* + * pre_op_attr + * union pre_op_attr switch (bool attributes_follow) { + * case TRUE: + * wcc_attr attributes; + * case FALSE: + * void; + * }; + * + * wcc_data + * + * struct wcc_data { + * pre_op_attr before; + * post_op_attr after; + * }; + */ +static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { __be32 *p; p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) goto out_overflow; - if (ntohl(*p++)) { - p = xdr_inline_decode(xdr, 84); - if (unlikely(!p)) - goto out_overflow; - p = xdr_decode_fattr(p, fattr); - } - return p; + if (*p != xdr_zero) + return decode_wcc_attr(xdr, fattr); + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EIO; } -static inline __be32 * -xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr) +static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) { - if (*p++) - return xdr_decode_wcc_attr(p, fattr); - return p; + int error; + + error = decode_pre_op_attr(xdr, fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, fattr); +out: + return error; } +/* + * post_op_fh3 + * + * union post_op_fh3 switch (bool handle_follows) { + * case TRUE: + * nfs_fh3 handle; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + __be32 *p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_nfs_fh3(xdr, fh); + zero_nfs_fh3(fh); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} -static inline __be32 * -xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr) +/* + * diropargs3 + * + * struct diropargs3 { + * nfs_fh3 dir; + * filename3 name; + * }; + */ +static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, + const char *name, u32 length) { - p = xdr_decode_pre_op_attr(p, fattr); - return xdr_decode_post_op_attr(p, fattr); + encode_nfs_fh3(xdr, fh); + encode_filename3(xdr, name, length); } + /* - * NFS encode functions + * NFSv3 XDR encode functions + * + * NFSv3 argument types are defined in section 3.3 of RFC 1813: + * "NFS Version 3 Protocol Specification". */ /* - * Encode file handle argument + * 3.3.1 GETATTR3args + * + * struct GETATTR3args { + * nfs_fh3 object; + * }; */ -static int -nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) +static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_fh *fh) { - p = xdr_encode_fhandle(p, fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, fh); } /* - * Encode SETATTR arguments + * 3.3.2 SETATTR3args + * + * union sattrguard3 switch (bool check) { + * case TRUE: + * nfstime3 obj_ctime; + * case FALSE: + * void; + * }; + * + * struct SETATTR3args { + * nfs_fh3 object; + * sattr3 new_attributes; + * sattrguard3 guard; + * }; */ -static int -nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args) -{ - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_sattr(p, args->sattr); - *p++ = htonl(args->guard); - if (args->guard) - p = xdr_encode_time3(p, &args->guardtime); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void encode_sattrguard3(struct xdr_stream *xdr, + const struct nfs3_sattrargs *args) +{ + __be32 *p; + + if (args->guard) { + p = xdr_reserve_space(xdr, 4 + 8); + *p++ = xdr_one; + xdr_encode_nfstime3(p, &args->guardtime); + } else { + p = xdr_reserve_space(xdr, 4); + *p = xdr_zero; + } +} + +static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_sattrargs *args) +{ + encode_nfs_fh3(xdr, args->fh); + encode_sattr3(xdr, args->sattr); + encode_sattrguard3(xdr, args); } /* - * Encode directory ops argument + * 3.3.3 LOOKUP3args + * + * struct LOOKUP3args { + * diropargs3 what; + * }; */ -static int -nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args) +static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_diropargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_diropargs3(xdr, args->fh, args->name, args->len); } /* - * Encode REMOVE argument + * 3.3.4 ACCESS3args + * + * struct ACCESS3args { + * nfs_fh3 object; + * uint32 access; + * }; */ -static int -nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static void encode_access3args(struct xdr_stream *xdr, + const struct nfs3_accessargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name.name, args->name.len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, args->fh); + encode_uint32(xdr, args->access); +} + +static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_accessargs *args) +{ + encode_access3args(xdr, args); } /* - * Encode access() argument + * 3.3.5 READLINK3args + * + * struct READLINK3args { + * nfs_fh3 symlink; + * }; */ -static int -nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args) +static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readlinkargs *args) { - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->access); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, args->fh); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->pglen, NFS3_readlinkres_sz); } /* - * Arguments to a READ call. Since we read data directly into the page - * cache, we also set up the reply iovec here so that iov[1] points - * exactly to the page we want to fetch. + * 3.3.6 READ3args + * + * struct READ3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * }; */ -static int -nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) +static void encode_read3args(struct xdr_stream *xdr, + const struct nfs_pgio_args *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); + encode_nfs_fh3(xdr, args->fh); + + p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + *p = cpu_to_be32(args->count); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, - args->pages, args->pgbase, count); +static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_pgio_args *args) +{ + encode_read3args(xdr, args); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->count, NFS3_readres_sz); req->rq_rcv_buf.flags |= XDRBUF_READ; - return 0; } /* - * Write arguments. Splice the buffer to be written into the iovec. + * 3.3.7 WRITE3args + * + * enum stable_how { + * UNSTABLE = 0, + * DATA_SYNC = 1, + * FILE_SYNC = 2 + * }; + * + * struct WRITE3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * stable_how stable; + * opaque data<>; + * }; */ -static int -nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void encode_write3args(struct xdr_stream *xdr, + const struct nfs_pgio_args *args) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - u32 count = args->count; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); + encode_nfs_fh3(xdr, args->fh); + + p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(count); - *p++ = htonl(args->stable); - *p++ = htonl(count); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); - - /* Copy the page array */ - xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); - sndbuf->flags |= XDRBUF_WRITE; - return 0; + *p++ = cpu_to_be32(args->count); + *p++ = cpu_to_be32(args->stable); + *p = cpu_to_be32(args->count); + xdr_write_pages(xdr, args->pages, args->pgbase, args->count); +} + +static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_pgio_args *args) +{ + encode_write3args(xdr, args); + xdr->buf->flags |= XDRBUF_WRITE; } /* - * Encode CREATE arguments + * 3.3.8 CREATE3args + * + * enum createmode3 { + * UNCHECKED = 0, + * GUARDED = 1, + * EXCLUSIVE = 2 + * }; + * + * union createhow3 switch (createmode3 mode) { + * case UNCHECKED: + * case GUARDED: + * sattr3 obj_attributes; + * case EXCLUSIVE: + * createverf3 verf; + * }; + * + * struct CREATE3args { + * diropargs3 where; + * createhow3 how; + * }; */ -static int -nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args) +static void encode_createhow3(struct xdr_stream *xdr, + const struct nfs3_createargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - - *p++ = htonl(args->createmode); - if (args->createmode == NFS3_CREATE_EXCLUSIVE) { - *p++ = args->verifier[0]; - *p++ = args->verifier[1]; - } else - p = xdr_encode_sattr(p, args->sattr); + encode_uint32(xdr, args->createmode); + switch (args->createmode) { + case NFS3_CREATE_UNCHECKED: + case NFS3_CREATE_GUARDED: + encode_sattr3(xdr, args->sattr); + break; + case NFS3_CREATE_EXCLUSIVE: + encode_createverf3(xdr, args->verifier); + break; + default: + BUG(); + } +} - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_createargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_createhow3(xdr, args); } /* - * Encode MKDIR arguments + * 3.3.9 MKDIR3args + * + * struct MKDIR3args { + * diropargs3 where; + * sattr3 attributes; + * }; */ -static int -nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args) +static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_mkdirargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_sattr3(xdr, args->sattr); } /* - * Encode SYMLINK arguments + * 3.3.10 SYMLINK3args + * + * struct symlinkdata3 { + * sattr3 symlink_attributes; + * nfspath3 symlink_data; + * }; + * + * struct SYMLINK3args { + * diropargs3 where; + * symlinkdata3 symlink; + * }; */ -static int -nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args) +static void encode_symlinkdata3(struct xdr_stream *xdr, + const struct nfs3_symlinkargs *args) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_array(p, args->fromname, args->fromlen); - p = xdr_encode_sattr(p, args->sattr); - *p++ = htonl(args->pathlen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + encode_sattr3(xdr, args->sattr); + encode_nfspath3(xdr, args->pages, args->pathlen); +} - /* Copy the page */ - xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen); - return 0; +static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_symlinkargs *args) +{ + encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); + encode_symlinkdata3(xdr, args); } /* - * Encode MKNOD arguments + * 3.3.11 MKNOD3args + * + * struct devicedata3 { + * sattr3 dev_attributes; + * specdata3 spec; + * }; + * + * union mknoddata3 switch (ftype3 type) { + * case NF3CHR: + * case NF3BLK: + * devicedata3 device; + * case NF3SOCK: + * case NF3FIFO: + * sattr3 pipe_attributes; + * default: + * void; + * }; + * + * struct MKNOD3args { + * diropargs3 where; + * mknoddata3 what; + * }; */ -static int -nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args) -{ - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - *p++ = htonl(args->type); - p = xdr_encode_sattr(p, args->sattr); - if (args->type == NF3CHR || args->type == NF3BLK) { - *p++ = htonl(MAJOR(args->rdev)); - *p++ = htonl(MINOR(args->rdev)); +static void encode_devicedata3(struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_sattr3(xdr, args->sattr); + encode_specdata3(xdr, args->rdev); +} + +static void encode_mknoddata3(struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_ftype3(xdr, args->type); + switch (args->type) { + case NF3CHR: + case NF3BLK: + encode_devicedata3(xdr, args); + break; + case NF3SOCK: + case NF3FIFO: + encode_sattr3(xdr, args->sattr); + break; + case NF3REG: + case NF3DIR: + break; + default: + BUG(); } +} - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_mknoddata3(xdr, args); } /* - * Encode RENAME arguments + * 3.3.12 REMOVE3args + * + * struct REMOVE3args { + * diropargs3 object; + * }; */ -static int -nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) -{ - p = xdr_encode_fhandle(p, args->old_dir); - p = xdr_encode_array(p, args->old_name->name, args->old_name->len); - p = xdr_encode_fhandle(p, args->new_dir); - p = xdr_encode_array(p, args->new_name->name, args->new_name->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_removeargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); } /* - * Encode LINK arguments + * 3.3.14 RENAME3args + * + * struct RENAME3args { + * diropargs3 from; + * diropargs3 to; + * }; */ -static int -nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args) +static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_fhandle(p, args->tofh); - p = xdr_encode_array(p, args->toname, args->tolen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + const struct qstr *old = args->old_name; + const struct qstr *new = args->new_name; + + encode_diropargs3(xdr, args->old_dir, old->name, old->len); + encode_diropargs3(xdr, args->new_dir, new->name, new->len); } /* - * Encode arguments to readdir call + * 3.3.15 LINK3args + * + * struct LINK3args { + * nfs_fh3 file; + * diropargs3 link; + * }; */ -static int -nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args) +static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_linkargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; - - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_hyper(p, args->cookie); - *p++ = args->verf[0]; - *p++ = args->verf[1]; - if (args->plus) { - /* readdirplus: need dircount + buffer size. - * We just make sure we make dircount big enough */ - *p++ = htonl(count >> 3); - } - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); - return 0; + encode_nfs_fh3(xdr, args->fromfh); + encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); } /* - * Decode the result of a readdir call. - * We just check for syntactical correctness. + * 3.3.16 READDIR3args + * + * struct READDIR3args { + * nfs_fh3 dir; + * cookie3 cookie; + * cookieverf3 cookieverf; + * count3 count; + * }; */ -static int -nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) +static void encode_readdir3args(struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - struct page **page; - size_t hdrlen; - u32 recvd, pglen; - int status, nr = 0; - - status = ntohl(*p++); - /* Decode post_op_attrs */ - p = xdr_decode_post_op_attr(p, res->dir_attr); - if (status) - return nfs_stat_to_errno(status); - /* Decode verifier cookie */ - if (res->verf) { - res->verf[0] = *p++; - res->verf[1] = *p++; - } else { - p += 2; - } + __be32 *p; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READDIR reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } + encode_nfs_fh3(xdr, args->fh); - pglen = rcvbuf->page_len; - recvd = rcvbuf->len - hdrlen; - if (pglen > recvd) - pglen = recvd; - page = rcvbuf->pages; + p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); + p = xdr_encode_cookie3(p, args->cookie); + p = xdr_encode_cookieverf3(p, args->verf); + *p = cpu_to_be32(args->count); +} - return nr; +static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) +{ + encode_readdir3args(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS3_readdirres_sz); } -__be32 * -nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) +/* + * 3.3.17 READDIRPLUS3args + * + * struct READDIRPLUS3args { + * nfs_fh3 dir; + * cookie3 cookie; + * cookieverf3 cookieverf; + * count3 dircount; + * count3 maxcount; + * }; + */ +static void encode_readdirplus3args(struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) { __be32 *p; - struct nfs_entry old = *entry; - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) { - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); - entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); - } + encode_nfs_fh3(xdr, args->fh); - p = xdr_inline_decode(xdr, 12); - if (unlikely(!p)) - goto out_overflow; - p = xdr_decode_hyper(p, &entry->ino); - entry->len = ntohl(*p++); + p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); + p = xdr_encode_cookie3(p, args->cookie); + p = xdr_encode_cookieverf3(p, args->verf); - p = xdr_inline_decode(xdr, entry->len + 8); - if (unlikely(!p)) - goto out_overflow; - entry->name = (const char *) p; - p += XDR_QUADLEN(entry->len); - entry->prev_cookie = entry->cookie; - p = xdr_decode_hyper(p, &entry->cookie); - - if (plus) { - entry->fattr->valid = 0; - p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); - if (IS_ERR(p)) - goto out_overflow_exit; - /* In fact, a post_op_fh3: */ - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (*p++) { - p = xdr_decode_fhandle_stream(xdr, entry->fh); - if (IS_ERR(p)) - goto out_overflow_exit; - /* Ugh -- server reply was truncated */ - if (p == NULL) { - dprintk("NFS: FH truncated\n"); - *entry = old; - return ERR_PTR(-EAGAIN); - } - } else - memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); - } + /* + * readdirplus: need dircount + buffer size. + * We just make sure we make dircount big enough + */ + *p++ = cpu_to_be32(args->count >> 3); - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; - - return p; + *p = cpu_to_be32(args->count); +} -out_overflow: - print_overflow_msg(__func__, xdr); -out_overflow_exit: - return ERR_PTR(-EIO); +static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) +{ + encode_readdirplus3args(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS3_readdirres_sz); } /* - * Encode COMMIT arguments + * 3.3.21 COMMIT3args + * + * struct COMMIT3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * }; */ -static int -nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void encode_commit3args(struct xdr_stream *xdr, + const struct nfs_commitargs *args) { - p = xdr_encode_fhandle(p, args->fh); + __be32 *p; + + encode_nfs_fh3(xdr, args->fh); + + p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(args->count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + *p = cpu_to_be32(args->count); } -#ifdef CONFIG_NFS_V3_ACL -/* - * Encode GETACL arguments - */ -static int -nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p, - struct nfs3_getaclargs *args) +static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_commitargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; + encode_commit3args(xdr, args); +} - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->mask); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); +#ifdef CONFIG_NFS_V3_ACL - if (args->mask & (NFS_ACL | NFS_DFACL)) { - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + - ACL3_getaclres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, - NFSACL_MAXPAGES << PAGE_SHIFT); - } - return 0; +static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_getaclargs *args) +{ + encode_nfs_fh3(xdr, args->fh); + encode_uint32(xdr, args->mask); + if (args->mask & (NFS_ACL | NFS_DFACL)) + prepare_reply_buffer(req, args->pages, 0, + NFSACL_MAXPAGES << PAGE_SHIFT, + ACL3_getaclres_sz); } -/* - * Encode SETACL arguments - */ -static int -nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p, - struct nfs3_setaclargs *args) +static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_setaclargs *args) { - struct xdr_buf *buf = &req->rq_snd_buf; unsigned int base; - int err; + int error; - p = xdr_encode_fhandle(p, NFS_FH(args->inode)); - *p++ = htonl(args->mask); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - base = req->rq_slen; + encode_nfs_fh3(xdr, NFS_FH(args->inode)); + encode_uint32(xdr, args->mask); + base = req->rq_slen; if (args->npages != 0) - xdr_encode_pages(buf, args->pages, 0, args->len); + xdr_write_pages(xdr, args->pages, 0, args->len); else - req->rq_slen = xdr_adjust_iovec(req->rq_svec, - p + XDR_QUADLEN(args->len)); + xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE); - err = nfsacl_encode(buf, base, args->inode, + error = nfsacl_encode(xdr->buf, base, args->inode, (args->mask & NFS_ACL) ? args->acl_access : NULL, 1, 0); - if (err > 0) - err = nfsacl_encode(buf, base + err, args->inode, - (args->mask & NFS_DFACL) ? - args->acl_default : NULL, 1, - NFS_ACL_DEFAULT); - return (err > 0) ? 0 : err; + /* FIXME: this is just broken */ + BUG_ON(error < 0); + error = nfsacl_encode(xdr->buf, base + error, args->inode, + (args->mask & NFS_DFACL) ? + args->acl_default : NULL, 1, + NFS_ACL_DEFAULT); + BUG_ON(error < 0); } + #endif /* CONFIG_NFS_V3_ACL */ /* - * NFS XDR decode functions + * NFSv3 XDR decode functions + * + * NFSv3 result types are defined in section 3.3 of RFC 1813: + * "NFS Version 3 Protocol Specification". */ /* - * Decode attrstat reply. + * 3.3.1 GETATTR3res + * + * struct GETATTR3resok { + * fattr3 obj_attributes; + * }; + * + * union GETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * GETATTR3resok resok; + * default: + * void; + * }; */ -static int -nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - xdr_decode_fattr(p, fattr); - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_fattr3(xdr, result); +out: + return error; +out_default: + return nfs3_stat_to_errno(status); } /* - * Decode status+wcc_data reply - * SATTR, REMOVE, RMDIR + * 3.3.2 SETATTR3res + * + * struct SETATTR3resok { + * wcc_data obj_wcc; + * }; + * + * struct SETATTR3resfail { + * wcc_data obj_wcc; + * }; + * + * union SETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * SETATTR3resok resok; + * default: + * SETATTR3resfail resfail; + * }; */ -static int -nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status; - - if ((status = ntohl(*p++))) - status = nfs_stat_to_errno(status); - xdr_decode_wcc_data(p, fattr); - return status; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } -static int -nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) +/* + * 3.3.3 LOOKUP3res + * + * struct LOOKUP3resok { + * nfs_fh3 object; + * post_op_attr obj_attributes; + * post_op_attr dir_attributes; + * }; + * + * struct LOOKUP3resfail { + * post_op_attr dir_attributes; + * }; + * + * union LOOKUP3res switch (nfsstat3 status) { + * case NFS3_OK: + * LOOKUP3resok resok; + * default: + * LOOKUP3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_diropres *result) { - return nfs3_xdr_wccstat(req, p, res->dir_attr); + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfs_fh3(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->dir_attr); +out: + return error; +out_default: + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs3_stat_to_errno(status); } /* - * Decode LOOKUP reply + * 3.3.4 ACCESS3res + * + * struct ACCESS3resok { + * post_op_attr obj_attributes; + * uint32 access; + * }; + * + * struct ACCESS3resfail { + * post_op_attr obj_attributes; + * }; + * + * union ACCESS3res switch (nfsstat3 status) { + * case NFS3_OK: + * ACCESS3resok resok; + * default: + * ACCESS3resfail resfail; + * }; */ -static int -nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) +static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_accessres *result) { - int status; - - if ((status = ntohl(*p++))) { - status = nfs_stat_to_errno(status); - } else { - if (!(p = xdr_decode_fhandle(p, res->fh))) - return -errno_NFSERR_IO; - p = xdr_decode_post_op_attr(p, res->fattr); - } - xdr_decode_post_op_attr(p, res->dir_attr); - return status; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_uint32(xdr, &result->access); +out: + return error; +out_default: + return nfs3_stat_to_errno(status); } /* - * Decode ACCESS reply + * 3.3.5 READLINK3res + * + * struct READLINK3resok { + * post_op_attr symlink_attributes; + * nfspath3 data; + * }; + * + * struct READLINK3resfail { + * post_op_attr symlink_attributes; + * }; + * + * union READLINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * READLINK3resok resok; + * default: + * READLINK3resfail resfail; + * }; */ -static int -nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) +static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status) - return nfs_stat_to_errno(status); - res->access = ntohl(*p++); - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfspath3(xdr); +out: + return error; +out_default: + return nfs3_stat_to_errno(status); } -static int -nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args) +/* + * 3.3.6 READ3res + * + * struct READ3resok { + * post_op_attr file_attributes; + * count3 count; + * bool eof; + * opaque data<>; + * }; + * + * struct READ3resfail { + * post_op_attr file_attributes; + * }; + * + * union READ3res switch (nfsstat3 status) { + * case NFS3_OK: + * READ3resok resok; + * default: + * READ3resfail resfail; + * }; + */ +static int decode_read3resok(struct xdr_stream *xdr, + struct nfs_pgio_res *result) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; + u32 eof, count, ocount, recvd; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + p = xdr_inline_decode(xdr, 4 + 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p++); + eof = be32_to_cpup(p++); + ocount = be32_to_cpup(p++); + if (unlikely(ocount != count)) + goto out_mismatch; + recvd = xdr_read_pages(xdr, count); + if (unlikely(count > recvd)) + goto out_cheating; +out: + result->eof = eof; + result->count = count; + return count; +out_mismatch: + dprintk("NFS: READ count doesn't match length of opaque: " + "count %u != ocount %u\n", count, ocount); + return -EIO; +out_cheating: + dprintk("NFS: server cheating in read result: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + eof = 0; + goto out; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); - return 0; +static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_res *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_read3resok(xdr, result); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } /* - * Decode READLINK reply + * 3.3.7 WRITE3res + * + * enum stable_how { + * UNSTABLE = 0, + * DATA_SYNC = 1, + * FILE_SYNC = 2 + * }; + * + * struct WRITE3resok { + * wcc_data file_wcc; + * count3 count; + * stable_how committed; + * writeverf3 verf; + * }; + * + * struct WRITE3resfail { + * wcc_data file_wcc; + * }; + * + * union WRITE3res switch (nfsstat3 status) { + * case NFS3_OK: + * WRITE3resok resok; + * default: + * WRITE3resfail resfail; + * }; */ -static int -nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int decode_write3resok(struct xdr_stream *xdr, + struct nfs_pgio_res *result) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; - u32 len, recvd; - int status; - - status = ntohl(*p++); - p = xdr_decode_post_op_attr(p, fattr); + __be32 *p; - if (status != 0) - return nfs_stat_to_errno(status); + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + result->count = be32_to_cpup(p++); + result->verf->committed = be32_to_cpup(p++); + if (unlikely(result->verf->committed > NFS_FILE_SYNC)) + goto out_badvalue; + if (decode_writeverf3(xdr, &result->verf->verifier)) + goto out_eio; + return result->count; +out_badvalue: + dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); +out_eio: + return -EIO; +} - /* Convert length of symlink */ - len = ntohl(*p++); - if (len >= rcvbuf->page_len) { - dprintk("nfs: server returned giant symlink!\n"); - return -ENAMETOOLONG; - } +static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_res *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_write3resok(xdr, result); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); +} - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READLINK reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READLINK header is short. " - "iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } - recvd = req->rq_rcv_buf.len - hdrlen; - if (recvd < len) { - dprintk("NFS: server cheating in readlink reply: " - "count %u > recvd %u\n", len, recvd); - return -EIO; - } +/* + * 3.3.8 CREATE3res + * + * struct CREATE3resok { + * post_op_fh3 obj; + * post_op_attr obj_attributes; + * wcc_data dir_wcc; + * }; + * + * struct CREATE3resfail { + * wcc_data dir_wcc; + * }; + * + * union CREATE3res switch (nfsstat3 status) { + * case NFS3_OK: + * CREATE3resok resok; + * default: + * CREATE3resfail resfail; + * }; + */ +static int decode_create3resok(struct xdr_stream *xdr, + struct nfs3_diropres *result) +{ + int error; + + error = decode_post_op_fh3(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + /* The server isn't required to return a file handle. + * If it didn't, force the client to perform a LOOKUP + * to determine the correct file handle and attribute + * values for the new object. */ + if (result->fh->size == 0) + result->fattr->valid = 0; + error = decode_wcc_data(xdr, result->dir_attr); +out: + return error; +} - xdr_terminate_string(rcvbuf, len); - return 0; +static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_diropres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_create3resok(xdr, result); +out: + return error; +out_default: + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs3_stat_to_errno(status); } /* - * Decode READ reply + * 3.3.12 REMOVE3res + * + * struct REMOVE3resok { + * wcc_data dir_wcc; + * }; + * + * struct REMOVE3resfail { + * wcc_data dir_wcc; + * }; + * + * union REMOVE3res switch (nfsstat3 status) { + * case NFS3_OK: + * REMOVE3resok resok; + * default: + * REMOVE3resfail resfail; + * }; */ -static int -nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) +static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_removeres *result) { - struct kvec *iov = req->rq_rcv_buf.head; - size_t hdrlen; - u32 count, ocount, recvd; - int status; - - status = ntohl(*p++); - p = xdr_decode_post_op_attr(p, res->fattr); + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs3_stat_to_errno(status); +} - if (status != 0) - return nfs_stat_to_errno(status); +/* + * 3.3.14 RENAME3res + * + * struct RENAME3resok { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * struct RENAME3resfail { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * union RENAME3res switch (nfsstat3 status) { + * case NFS3_OK: + * RENAME3resok resok; + * default: + * RENAME3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_renameres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->old_fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->new_fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs3_stat_to_errno(status); +} - /* Decode reply count and EOF flag. NFSv3 is somewhat redundant - * in that it puts the count both in the res struct and in the - * opaque data count. */ - count = ntohl(*p++); - res->eof = ntohl(*p++); - ocount = ntohl(*p++); +/* + * 3.3.15 LINK3res + * + * struct LINK3resok { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * struct LINK3resfail { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * union LINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * LINK3resok resok; + * default: + * LINK3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs3_linkres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs3_stat_to_errno(status); +} - if (ocount != count) { - dprintk("NFS: READ count doesn't match RPC opaque count.\n"); - return -errno_NFSERR_IO; - } +/** + * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in + * the local page cache + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + * + * 3.3.16 entry3 + * + * struct entry3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * fhandle3 filehandle; + * post_op_attr3 attributes; + * entry3 *nextentry; + * }; + * + * 3.3.17 entryplus3 + * struct entryplus3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * post_op_attr name_attributes; + * post_op_fh3 name_handle; + * entryplus3 *nextentry; + * }; + */ +int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) +{ + struct nfs_entry old = *entry; + __be32 *p; + int error; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READ reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READ header is short. iovec will be shifted.\n"); - xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) + return -EAGAIN; + entry->eof = 1; + return -EBADCOOKIE; } - recvd = req->rq_rcv_buf.len - hdrlen; - if (count > recvd) { - dprintk("NFS: server cheating in read reply: " - "count %u > recvd %u\n", count, recvd); - count = recvd; - res->eof = 0; - } + error = decode_fileid3(xdr, &entry->ino); + if (unlikely(error)) + return error; - if (count < res->count) - res->count = count; + error = decode_inline_filename3(xdr, &entry->name, &entry->len); + if (unlikely(error)) + return error; - return count; -} + entry->prev_cookie = entry->cookie; + error = decode_cookie3(xdr, &entry->cookie); + if (unlikely(error)) + return error; -/* - * Decode WRITE response - */ -static int -nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) -{ - int status; + entry->d_type = DT_UNKNOWN; - status = ntohl(*p++); - p = xdr_decode_wcc_data(p, res->fattr); + if (plus) { + entry->fattr->valid = 0; + error = decode_post_op_attr(xdr, entry->fattr); + if (unlikely(error)) + return error; + if (entry->fattr->valid & NFS_ATTR_FATTR_V3) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); - if (status != 0) - return nfs_stat_to_errno(status); + /* In fact, a post_op_fh3: */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) { + error = decode_nfs_fh3(xdr, entry->fh); + if (unlikely(error)) { + if (error == -E2BIG) + goto out_truncated; + return error; + } + } else + zero_nfs_fh3(entry->fh); + } - res->count = ntohl(*p++); - res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); - res->verf->verifier[0] = *p++; - res->verf->verifier[1] = *p++; + return 0; - return res->count; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EAGAIN; +out_truncated: + dprintk("NFS: directory entry contains invalid file handle\n"); + *entry = old; + return -EAGAIN; } /* - * Decode a CREATE response + * 3.3.16 READDIR3res + * + * struct dirlist3 { + * entry3 *entries; + * bool eof; + * }; + * + * struct READDIR3resok { + * post_op_attr dir_attributes; + * cookieverf3 cookieverf; + * dirlist3 reply; + * }; + * + * struct READDIR3resfail { + * post_op_attr dir_attributes; + * }; + * + * union READDIR3res switch (nfsstat3 status) { + * case NFS3_OK: + * READDIR3resok resok; + * default: + * READDIR3resfail resfail; + * }; + * + * Read the directory contents into the page cache, but otherwise + * don't touch them. The actual decoding is done by nfs3_decode_entry() + * during subsequent nfs_readdir() calls. */ -static int -nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) -{ - int status; - - status = ntohl(*p++); - if (status == 0) { - if (*p++) { - if (!(p = xdr_decode_fhandle(p, res->fh))) - return -errno_NFSERR_IO; - p = xdr_decode_post_op_attr(p, res->fattr); - } else { - memset(res->fh, 0, sizeof(*res->fh)); - /* Do decode post_op_attr but set it to NULL */ - p = xdr_decode_post_op_attr(p, res->fattr); - res->fattr->valid = 0; - } - } else { - status = nfs_stat_to_errno(status); - } - p = xdr_decode_wcc_data(p, res->dir_attr); - return status; +static int decode_dirlist3(struct xdr_stream *xdr) +{ + return xdr_read_pages(xdr, xdr->buf->page_len); } -/* - * Decode RENAME reply - */ -static int -nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) +static int decode_readdir3resok(struct xdr_stream *xdr, + struct nfs3_readdirres *result) { - int status; - - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - p = xdr_decode_wcc_data(p, res->old_fattr); - p = xdr_decode_wcc_data(p, res->new_fattr); - return status; + int error; + + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + /* XXX: do we need to check if result->verf != NULL ? */ + error = decode_cookieverf3(xdr, result->verf); + if (unlikely(error)) + goto out; + error = decode_dirlist3(xdr); +out: + return error; } -/* - * Decode LINK reply - */ -static int -nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) +static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_readdirres *result) { - int status; - - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - p = xdr_decode_post_op_attr(p, res->fattr); - p = xdr_decode_wcc_data(p, res->dir_attr); - return status; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_readdir3resok(xdr, result); +out: + return error; +out_default: + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs3_stat_to_errno(status); } /* - * Decode FSSTAT reply + * 3.3.18 FSSTAT3res + * + * struct FSSTAT3resok { + * post_op_attr obj_attributes; + * size3 tbytes; + * size3 fbytes; + * size3 abytes; + * size3 tfiles; + * size3 ffiles; + * size3 afiles; + * uint32 invarsec; + * }; + * + * struct FSSTAT3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSSTAT3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSSTAT3resok resok; + * default: + * FSSTAT3resfail resfail; + * }; */ -static int -nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) +static int decode_fsstat3resok(struct xdr_stream *xdr, + struct nfs_fsstat *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - - p = xdr_decode_hyper(p, &res->tbytes); - p = xdr_decode_hyper(p, &res->fbytes); - p = xdr_decode_hyper(p, &res->abytes); - p = xdr_decode_hyper(p, &res->tfiles); - p = xdr_decode_hyper(p, &res->ffiles); - p = xdr_decode_hyper(p, &res->afiles); + __be32 *p; + p = xdr_inline_decode(xdr, 8 * 6 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + p = xdr_decode_size3(p, &result->tbytes); + p = xdr_decode_size3(p, &result->fbytes); + p = xdr_decode_size3(p, &result->abytes); + p = xdr_decode_size3(p, &result->tfiles); + p = xdr_decode_size3(p, &result->ffiles); + xdr_decode_size3(p, &result->afiles); /* ignore invarsec */ return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fsstat *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsstat3resok(xdr, result); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } /* - * Decode FSINFO reply + * 3.3.19 FSINFO3res + * + * struct FSINFO3resok { + * post_op_attr obj_attributes; + * uint32 rtmax; + * uint32 rtpref; + * uint32 rtmult; + * uint32 wtmax; + * uint32 wtpref; + * uint32 wtmult; + * uint32 dtpref; + * size3 maxfilesize; + * nfstime3 time_delta; + * uint32 properties; + * }; + * + * struct FSINFO3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSINFO3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSINFO3resok resok; + * default: + * FSINFO3resfail resfail; + * }; */ -static int -nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) +static int decode_fsinfo3resok(struct xdr_stream *xdr, + struct nfs_fsinfo *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); + __be32 *p; - res->rtmax = ntohl(*p++); - res->rtpref = ntohl(*p++); - res->rtmult = ntohl(*p++); - res->wtmax = ntohl(*p++); - res->wtpref = ntohl(*p++); - res->wtmult = ntohl(*p++); - res->dtpref = ntohl(*p++); - p = xdr_decode_hyper(p, &res->maxfilesize); - p = xdr_decode_time3(p, &res->time_delta); + p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + result->rtmax = be32_to_cpup(p++); + result->rtpref = be32_to_cpup(p++); + result->rtmult = be32_to_cpup(p++); + result->wtmax = be32_to_cpup(p++); + result->wtpref = be32_to_cpup(p++); + result->wtmult = be32_to_cpup(p++); + result->dtpref = be32_to_cpup(p++); + p = xdr_decode_size3(p, &result->maxfilesize); + xdr_decode_nfstime3(p, &result->time_delta); /* ignore properties */ - res->lease_time = 0; + result->lease_time = 0; return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fsinfo *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsinfo3resok(xdr, result); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } /* - * Decode PATHCONF reply + * 3.3.20 PATHCONF3res + * + * struct PATHCONF3resok { + * post_op_attr obj_attributes; + * uint32 linkmax; + * uint32 name_max; + * bool no_trunc; + * bool chown_restricted; + * bool case_insensitive; + * bool case_preserving; + * }; + * + * struct PATHCONF3resfail { + * post_op_attr obj_attributes; + * }; + * + * union PATHCONF3res switch (nfsstat3 status) { + * case NFS3_OK: + * PATHCONF3resok resok; + * default: + * PATHCONF3resfail resfail; + * }; */ -static int -nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) +static int decode_pathconf3resok(struct xdr_stream *xdr, + struct nfs_pathconf *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - res->max_link = ntohl(*p++); - res->max_namelen = ntohl(*p++); + __be32 *p; + p = xdr_inline_decode(xdr, 4 * 6); + if (unlikely(p == NULL)) + goto out_overflow; + result->max_link = be32_to_cpup(p++); + result->max_namelen = be32_to_cpup(p); /* ignore remaining fields */ return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_pathconf *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_pathconf3resok(xdr, result); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } /* - * Decode COMMIT reply + * 3.3.21 COMMIT3res + * + * struct COMMIT3resok { + * wcc_data file_wcc; + * writeverf3 verf; + * }; + * + * struct COMMIT3resfail { + * wcc_data file_wcc; + * }; + * + * union COMMIT3res switch (nfsstat3 status) { + * case NFS3_OK: + * COMMIT3resok resok; + * default: + * COMMIT3resfail resfail; + * }; */ -static int -nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) +static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_commitres *result) { - int status; - - status = ntohl(*p++); - p = xdr_decode_wcc_data(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - - res->verf->verifier[0] = *p++; - res->verf->verifier[1] = *p++; - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_writeverf3(xdr, &result->verf->verifier); +out: + return error; +out_status: + return nfs3_stat_to_errno(status); } #ifdef CONFIG_NFS_V3_ACL -/* - * Decode GETACL reply - */ -static int -nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, - struct nfs3_getaclres *res) + +static inline int decode_getacl3resok(struct xdr_stream *xdr, + struct nfs3_getaclres *result) { - struct xdr_buf *buf = &req->rq_rcv_buf; - int status = ntohl(*p++); struct posix_acl **acl; unsigned int *aclcnt; - int err, base; - - if (status != 0) - return nfs_stat_to_errno(status); - p = xdr_decode_post_op_attr(p, res->fattr); - res->mask = ntohl(*p++); - if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) - return -EINVAL; - base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base; + size_t hdrlen; + int error; + + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_uint32(xdr, &result->mask); + if (unlikely(error)) + goto out; + error = -EINVAL; + if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) + goto out; + + hdrlen = xdr_stream_pos(xdr); + + acl = NULL; + if (result->mask & NFS_ACL) + acl = &result->acl_access; + aclcnt = NULL; + if (result->mask & NFS_ACLCNT) + aclcnt = &result->acl_access_count; + error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); + if (unlikely(error <= 0)) + goto out; + + acl = NULL; + if (result->mask & NFS_DFACL) + acl = &result->acl_default; + aclcnt = NULL; + if (result->mask & NFS_DFACLCNT) + aclcnt = &result->acl_default_count; + error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); + if (unlikely(error <= 0)) + return error; + error = 0; +out: + return error; +} - acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; - aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; - err = nfsacl_decode(buf, base, aclcnt, acl); +static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_getaclres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_getacl3resok(xdr, result); +out: + return error; +out_default: + return nfs3_stat_to_errno(status); +} - acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; - aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; - if (err > 0) - err = nfsacl_decode(buf, base + err, aclcnt, acl); - return (err > 0) ? 0 : err; +static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_post_op_attr(xdr, result); +out: + return error; +out_default: + return nfs3_stat_to_errno(status); } +#endif /* CONFIG_NFS_V3_ACL */ + + /* - * Decode setacl reply. + * We need to translate between nfs status return values and + * the local errno values which may not be the same. + */ +static const struct { + int stat; + int errno; +} nfs_errtbl[] = { + { NFS_OK, 0 }, + { NFSERR_PERM, -EPERM }, + { NFSERR_NOENT, -ENOENT }, + { NFSERR_IO, -errno_NFSERR_IO}, + { NFSERR_NXIO, -ENXIO }, +/* { NFSERR_EAGAIN, -EAGAIN }, */ + { NFSERR_ACCES, -EACCES }, + { NFSERR_EXIST, -EEXIST }, + { NFSERR_XDEV, -EXDEV }, + { NFSERR_NODEV, -ENODEV }, + { NFSERR_NOTDIR, -ENOTDIR }, + { NFSERR_ISDIR, -EISDIR }, + { NFSERR_INVAL, -EINVAL }, + { NFSERR_FBIG, -EFBIG }, + { NFSERR_NOSPC, -ENOSPC }, + { NFSERR_ROFS, -EROFS }, + { NFSERR_MLINK, -EMLINK }, + { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, + { NFSERR_NOTEMPTY, -ENOTEMPTY }, + { NFSERR_DQUOT, -EDQUOT }, + { NFSERR_STALE, -ESTALE }, + { NFSERR_REMOTE, -EREMOTE }, +#ifdef EWFLUSH + { NFSERR_WFLUSH, -EWFLUSH }, +#endif + { NFSERR_BADHANDLE, -EBADHANDLE }, + { NFSERR_NOT_SYNC, -ENOTSYNC }, + { NFSERR_BAD_COOKIE, -EBADCOOKIE }, + { NFSERR_NOTSUPP, -ENOTSUPP }, + { NFSERR_TOOSMALL, -ETOOSMALL }, + { NFSERR_SERVERFAULT, -EREMOTEIO }, + { NFSERR_BADTYPE, -EBADTYPE }, + { NFSERR_JUKEBOX, -EJUKEBOX }, + { -1, -EIO } +}; + +/** + * nfs3_stat_to_errno - convert an NFS status code to a local errno + * @status: NFS status code to convert + * + * Returns a local errno value, or -EIO if the NFS status code is + * not recognized. This function is used jointly by NFSv2 and NFSv3. */ -static int -nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_stat_to_errno(enum nfs_stat status) { - int status = ntohl(*p++); + int i; - if (status) - return nfs_stat_to_errno(status); - xdr_decode_post_op_attr(p, fattr); - return 0; + for (i = 0; nfs_errtbl[i].stat != -1; i++) { + if (nfs_errtbl[i].stat == (int)status) + return nfs_errtbl[i].errno; + } + dprintk("NFS: Unrecognized nfs status value: %u\n", status); + return nfs_errtbl[i].errno; } -#endif /* CONFIG_NFS_V3_ACL */ + #define PROC(proc, argtype, restype, timer) \ [NFS3PROC_##proc] = { \ .p_proc = NFS3PROC_##proc, \ - .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ - .p_arglen = NFS3_##argtype##_sz, \ - .p_replen = NFS3_##restype##_sz, \ + .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \ + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \ + .p_arglen = NFS3_##argtype##args_sz, \ + .p_replen = NFS3_##restype##res_sz, \ .p_timer = timer, \ .p_statidx = NFS3PROC_##proc, \ .p_name = #proc, \ } struct rpc_procinfo nfs3_procedures[] = { - PROC(GETATTR, fhandle, attrstat, 1), - PROC(SETATTR, sattrargs, wccstat, 0), - PROC(LOOKUP, diropargs, lookupres, 2), - PROC(ACCESS, accessargs, accessres, 1), - PROC(READLINK, readlinkargs, readlinkres, 3), - PROC(READ, readargs, readres, 3), - PROC(WRITE, writeargs, writeres, 4), - PROC(CREATE, createargs, createres, 0), - PROC(MKDIR, mkdirargs, createres, 0), - PROC(SYMLINK, symlinkargs, createres, 0), - PROC(MKNOD, mknodargs, createres, 0), - PROC(REMOVE, removeargs, removeres, 0), - PROC(RMDIR, diropargs, wccstat, 0), - PROC(RENAME, renameargs, renameres, 0), - PROC(LINK, linkargs, linkres, 0), - PROC(READDIR, readdirargs, readdirres, 3), - PROC(READDIRPLUS, readdirargs, readdirres, 3), - PROC(FSSTAT, fhandle, fsstatres, 0), - PROC(FSINFO, fhandle, fsinfores, 0), - PROC(PATHCONF, fhandle, pathconfres, 0), - PROC(COMMIT, commitargs, commitres, 5), + PROC(GETATTR, getattr, getattr, 1), + PROC(SETATTR, setattr, setattr, 0), + PROC(LOOKUP, lookup, lookup, 2), + PROC(ACCESS, access, access, 1), + PROC(READLINK, readlink, readlink, 3), + PROC(READ, read, read, 3), + PROC(WRITE, write, write, 4), + PROC(CREATE, create, create, 0), + PROC(MKDIR, mkdir, create, 0), + PROC(SYMLINK, symlink, create, 0), + PROC(MKNOD, mknod, create, 0), + PROC(REMOVE, remove, remove, 0), + PROC(RMDIR, lookup, setattr, 0), + PROC(RENAME, rename, rename, 0), + PROC(LINK, link, link, 0), + PROC(READDIR, readdir, readdir, 3), + PROC(READDIRPLUS, readdirplus, readdir, 3), + PROC(FSSTAT, getattr, fsstat, 0), + PROC(FSINFO, getattr, fsinfo, 0), + PROC(PATHCONF, getattr, pathconf, 0), + PROC(COMMIT, commit, commit, 5), }; -struct rpc_version nfs_version3 = { +const struct rpc_version nfs_version3 = { .number = 3, .nrprocs = ARRAY_SIZE(nfs3_procedures), .procs = nfs3_procedures @@ -1183,8 +2529,8 @@ struct rpc_version nfs_version3 = { static struct rpc_procinfo nfs3_acl_procedures[] = { [ACLPROC3_GETACL] = { .p_proc = ACLPROC3_GETACL, - .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs, - .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, + .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args, + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res, .p_arglen = ACL3_getaclargs_sz, .p_replen = ACL3_getaclres_sz, .p_timer = 1, @@ -1192,8 +2538,8 @@ static struct rpc_procinfo nfs3_acl_procedures[] = { }, [ACLPROC3_SETACL] = { .p_proc = ACLPROC3_SETACL, - .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs, - .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, + .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args, + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res, .p_arglen = ACL3_setaclargs_sz, .p_replen = ACL3_setaclres_sz, .p_timer = 0, @@ -1201,7 +2547,7 @@ static struct rpc_procinfo nfs3_acl_procedures[] = { }, }; -struct rpc_version nfsacl_version3 = { +const struct rpc_version nfsacl_version3 = { .number = 3, .nrprocs = sizeof(nfs3_acl_procedures)/ sizeof(nfs3_acl_procedures[0]), diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 9fa496387fd..ba2affa5194 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -9,33 +9,21 @@ #ifndef __LINUX_FS_NFS_NFS4_FS_H #define __LINUX_FS_NFS_NFS4_FS_H -#ifdef CONFIG_NFS_V4 +#if defined(CONFIG_NFS_V4_2) +#define NFS4_MAX_MINOR_VERSION 2 +#elif defined(CONFIG_NFS_V4_1) +#define NFS4_MAX_MINOR_VERSION 1 +#else +#define NFS4_MAX_MINOR_VERSION 0 +#endif -struct idmap; +#if IS_ENABLED(CONFIG_NFS_V4) -/* - * In a seqid-mutating op, this macro controls which error return - * values trigger incrementation of the seqid. - * - * from rfc 3010: - * The client MUST monotonically increment the sequence number for the - * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE - * operations. This is true even in the event that the previous - * operation that used the sequence number received an error. The only - * exception to this rule is if the previous operation received one of - * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID, - * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR, - * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE. - * - */ -#define seqid_mutating_err(err) \ -(((err) != NFSERR_STALE_CLIENTID) && \ - ((err) != NFSERR_STALE_STATEID) && \ - ((err) != NFSERR_BAD_STATEID) && \ - ((err) != NFSERR_BAD_SEQID) && \ - ((err) != NFSERR_BAD_XDR) && \ - ((err) != NFSERR_RESOURCE) && \ - ((err) != NFSERR_NOFILEHANDLE)) +#define NFS4_MAX_LOOP_ON_RECOVER (10) + +#include <linux/seqlock.h> + +struct idmap; enum nfs4_client_state { NFS4CLNT_MANAGER_RUNNING = 0, @@ -45,49 +33,51 @@ enum nfs4_client_state { NFS4CLNT_RECLAIM_NOGRACE, NFS4CLNT_DELEGRETURN, NFS4CLNT_SESSION_RESET, - NFS4CLNT_RECALL_SLOT, + NFS4CLNT_LEASE_CONFIRM, + NFS4CLNT_SERVER_SCOPE_MISMATCH, + NFS4CLNT_PURGE_STATE, + NFS4CLNT_BIND_CONN_TO_SESSION, + NFS4CLNT_MOVED, + NFS4CLNT_LEASE_MOVED, }; -enum nfs4_session_state { - NFS4_SESSION_INITING, - NFS4_SESSION_DRAINING, -}; +#define NFS4_RENEW_TIMEOUT 0x01 +#define NFS4_RENEW_DELEGATION_CB 0x02 struct nfs4_minor_version_ops { u32 minor_version; + unsigned init_caps; - int (*call_sync)(struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); - int (*validate_stateid)(struct nfs_delegation *, + int (*init_client)(struct nfs_client *); + void (*shutdown_client)(struct nfs_client *); + bool (*match_stateid)(const nfs4_stateid *, const nfs4_stateid *); + int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, + struct nfs_fsinfo *); + int (*free_lock_state)(struct nfs_server *, + struct nfs4_lock_state *); + const struct rpc_call_ops *call_sync_ops; const struct nfs4_state_recovery_ops *reboot_recovery_ops; const struct nfs4_state_recovery_ops *nograce_recovery_ops; const struct nfs4_state_maintenance_ops *state_renewal_ops; -}; - -/* - * struct rpc_sequence ensures that RPC calls are sent in the exact - * order that they appear on the list. - */ -struct rpc_sequence { - struct rpc_wait_queue wait; /* RPC call delay queue */ - spinlock_t lock; /* Protects the list */ - struct list_head list; /* Defines sequence of RPC calls */ + const struct nfs4_mig_recovery_ops *mig_recovery_ops; }; #define NFS_SEQID_CONFIRMED 1 struct nfs_seqid_counter { - struct rpc_sequence *sequence; + ktime_t create_time; + int owner_id; int flags; u32 counter; + spinlock_t lock; /* Protects the list */ + struct list_head list; /* Defines sequence of RPC calls */ + struct rpc_wait_queue wait; /* RPC call delay queue */ }; struct nfs_seqid { struct nfs_seqid_counter *sequence; struct list_head list; + struct rpc_task *task; }; static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) @@ -96,20 +86,16 @@ static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status seqid->flags |= NFS_SEQID_CONFIRMED; } -struct nfs_unique_id { - struct rb_node rb_node; - __u64 id; -}; - /* * NFS4 state_owners and lock_owners are simply labels for ordered * sequences of RPC calls. Their sole purpose is to provide once-only * semantics by allowing the server to identify replayed requests. */ struct nfs4_state_owner { - struct nfs_unique_id so_owner_id; struct nfs_server *so_server; - struct rb_node so_client_node; + struct list_head so_lru; + unsigned long so_expires; + struct rb_node so_server_node; struct rpc_cred *so_cred; /* Associated cred */ @@ -118,7 +104,8 @@ struct nfs4_state_owner { unsigned long so_flags; struct list_head so_states; struct nfs_seqid_counter so_seqid; - struct rpc_sequence so_sequence; + seqcount_t so_reclaim_seqcount; + struct mutex so_delegreturn_mutex; }; enum { @@ -156,11 +143,10 @@ struct nfs4_lock_owner { struct nfs4_lock_state { struct list_head ls_locks; /* Other lock stateids */ struct nfs4_state * ls_state; /* Pointer to open state */ -#define NFS_LOCK_INITIALIZED 1 - int ls_flags; +#define NFS_LOCK_INITIALIZED 0 +#define NFS_LOCK_LOST 1 + unsigned long ls_flags; struct nfs_seqid_counter ls_seqid; - struct rpc_sequence ls_sequence; - struct nfs_unique_id ls_id; nfs4_stateid ls_stateid; atomic_t ls_count; struct nfs4_lock_owner ls_owner; @@ -170,12 +156,14 @@ struct nfs4_lock_state { enum { LK_STATE_IN_USE, NFS_DELEGATED_STATE, /* Current stateid is delegation */ + NFS_OPEN_STATE, /* OPEN stateid is set */ NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */ NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */ NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */ + NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */ }; struct nfs4_state { @@ -206,6 +194,7 @@ struct nfs4_exception { long timeout; int retry; struct nfs4_state *state; + struct inode *inode; }; struct nfs4_state_recovery_ops { @@ -214,38 +203,63 @@ struct nfs4_state_recovery_ops { int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *); int (*recover_lock)(struct nfs4_state *, struct file_lock *); int (*establish_clid)(struct nfs_client *, struct rpc_cred *); - struct rpc_cred * (*get_clid_cred)(struct nfs_client *); - int (*reclaim_complete)(struct nfs_client *); + int (*reclaim_complete)(struct nfs_client *, struct rpc_cred *); + int (*detect_trunking)(struct nfs_client *, struct nfs_client **, + struct rpc_cred *); }; struct nfs4_state_maintenance_ops { - int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *); + int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned); struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *); int (*renew_lease)(struct nfs_client *, struct rpc_cred *); }; +struct nfs4_mig_recovery_ops { + int (*get_locations)(struct inode *, struct nfs4_fs_locations *, + struct page *, struct rpc_cred *); + int (*fsid_present)(struct inode *, struct rpc_cred *); +}; + extern const struct dentry_operations nfs4_dentry_operations; -extern const struct inode_operations nfs4_dir_inode_operations; -/* inode.c */ -extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t); -extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t, int); -extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t); +/* dir.c */ +int nfs_atomic_open(struct inode *, struct dentry *, struct file *, + unsigned, umode_t, int *); + +/* super.c */ +extern struct file_system_type nfs4_fs_type; +/* nfs4namespace.c */ +struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, struct qstr *); +struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *, + struct nfs_fh *, struct nfs_fattr *); +int nfs4_replace_transport(struct nfs_server *server, + const struct nfs4_fs_locations *locations); /* nfs4proc.c */ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); +extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool); +extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, struct rpc_cred *cred); extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred); -extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *); -extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *); +extern int nfs4_destroy_clientid(struct nfs_client *clp); extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *); extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *); -extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait); +extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait); extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); -extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, - struct nfs4_fs_locations *fs_locations, struct page *page); -extern void nfs4_release_lockowner(const struct nfs4_lock_state *); +extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *, + struct nfs4_fs_locations *, struct page *); +extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *, + struct page *page, struct rpc_cred *); +extern int nfs4_proc_fsid_present(struct inode *, struct rpc_cred *); +extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, struct qstr *, + struct nfs_fh *, struct nfs_fattr *); +extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *); +extern const struct xattr_handler *nfs4_xattr_handlers[]; +extern int nfs4_set_rw_stateid(nfs4_stateid *stateid, + const struct nfs_open_context *ctx, + const struct nfs_lock_context *l_ctx, + fmode_t fmode); #if defined(CONFIG_NFS_V4_1) static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) @@ -253,42 +267,128 @@ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *ser return server->nfs_client->cl_session; } -extern int nfs4_setup_sequence(const struct nfs_server *server, +extern int nfs41_setup_sequence(struct nfs4_session *session, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, - int cache_reply, struct rpc_task *task); -extern void nfs4_destroy_session(struct nfs4_session *session); -extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); -extern int nfs4_proc_create_session(struct nfs_client *); -extern int nfs4_proc_destroy_session(struct nfs4_session *); -extern int nfs4_init_session(struct nfs_server *server); + struct rpc_task *task); +extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *); +extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *); +extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *); extern int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo); +extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, + bool sync); + +static inline bool +is_ds_only_client(struct nfs_client *clp) +{ + return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) == + EXCHGID4_FLAG_USE_PNFS_DS; +} + +static inline bool +is_ds_client(struct nfs_client *clp) +{ + return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS; +} + +static inline bool +_nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, + struct rpc_clnt **clntp, struct rpc_message *msg) +{ + struct rpc_cred *newcred = NULL; + rpc_authflavor_t flavor; + + if (test_bit(sp4_mode, &clp->cl_sp4_flags)) { + spin_lock(&clp->cl_lock); + if (clp->cl_machine_cred != NULL) + /* don't call get_rpccred on the machine cred - + * a reference will be held for life of clp */ + newcred = clp->cl_machine_cred; + spin_unlock(&clp->cl_lock); + msg->rpc_cred = newcred; + + flavor = clp->cl_rpcclient->cl_auth->au_flavor; + WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I && + flavor != RPC_AUTH_GSS_KRB5P); + *clntp = clp->cl_rpcclient; + + return true; + } + return false; +} + +/* + * Function responsible for determining if an rpc_message should use the + * machine cred under SP4_MACH_CRED and if so switching the credential and + * authflavor (using the nfs_client's rpc_clnt which will be krb5i/p). + * Should be called before rpc_call_sync/rpc_call_async. + */ +static inline void +nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, + struct rpc_clnt **clntp, struct rpc_message *msg) +{ + _nfs4_state_protect(clp, sp4_mode, clntp, msg); +} + +/* + * Special wrapper to nfs4_state_protect for write. + * If WRITE can use machine cred but COMMIT cannot, make sure all writes + * that use machine cred use NFS_FILE_SYNC. + */ +static inline void +nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, + struct rpc_message *msg, struct nfs_pgio_data *wdata) +{ + if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) && + !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags)) + wdata->args.stable = NFS_FILE_SYNC; +} #else /* CONFIG_NFS_v4_1 */ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) { return NULL; } -static inline int nfs4_setup_sequence(const struct nfs_server *server, - struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, - int cache_reply, struct rpc_task *task) +static inline bool +is_ds_only_client(struct nfs_client *clp) { - return 0; + return false; } -static inline int nfs4_init_session(struct nfs_server *server) +static inline bool +is_ds_client(struct nfs_client *clp) +{ + return false; +} + +static inline void +nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags, + struct rpc_clnt **clntp, struct rpc_message *msg) +{ +} + +static inline void +nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, + struct rpc_message *msg, struct nfs_pgio_data *wdata) { - return 0; } #endif /* CONFIG_NFS_V4_1 */ extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[]; -extern const u32 nfs4_fattr_bitmap[2]; -extern const u32 nfs4_statfs_bitmap[2]; -extern const u32 nfs4_pathconf_bitmap[2]; -extern const u32 nfs4_fsinfo_bitmap[2]; -extern const u32 nfs4_fs_locations_bitmap[2]; +extern const u32 nfs4_fattr_bitmap[3]; +extern const u32 nfs4_statfs_bitmap[3]; +extern const u32 nfs4_pathconf_bitmap[3]; +extern const u32 nfs4_fsinfo_bitmap[3]; +extern const u32 nfs4_fs_locations_bitmap[3]; + +void nfs40_shutdown_client(struct nfs_client *); +void nfs41_shutdown_client(struct nfs_client *); +int nfs40_init_client(struct nfs_client *); +int nfs41_init_client(struct nfs_client *); +void nfs4_free_client(struct nfs_client *); + +struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *); /* nfs4renewd.c */ extern void nfs4_schedule_state_renewal(struct nfs_client *); @@ -297,29 +397,52 @@ extern void nfs4_kill_renewd(struct nfs_client *); extern void nfs4_renew_state(struct work_struct *); /* nfs4state.c */ -struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp); +struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp); +struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp); +int nfs4_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **); +int nfs40_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **, struct rpc_cred *); #if defined(CONFIG_NFS_V4_1) -struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); -struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp); +int nfs41_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **, struct rpc_cred *); +extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); +extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp); +extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp); + +#else +static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) +{ +} #endif /* CONFIG_NFS_V4_1 */ -extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *); +extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t); extern void nfs4_put_state_owner(struct nfs4_state_owner *); +extern void nfs4_purge_state_owners(struct nfs_server *); extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); extern void nfs4_put_open_state(struct nfs4_state *); -extern void nfs4_close_state(struct path *, struct nfs4_state *, fmode_t); -extern void nfs4_close_sync(struct path *, struct nfs4_state *, fmode_t); +extern void nfs4_close_state(struct nfs4_state *, fmode_t); +extern void nfs4_close_sync(struct nfs4_state *, fmode_t); extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); -extern void nfs4_schedule_state_recovery(struct nfs_client *); +extern void nfs_inode_find_state_and_recover(struct inode *inode, + const nfs4_stateid *stateid); +extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *); +extern void nfs4_schedule_lease_recovery(struct nfs_client *); +extern int nfs4_wait_clnt_recover(struct nfs_client *clp); +extern int nfs4_client_recover_expired_lease(struct nfs_client *clp); extern void nfs4_schedule_state_manager(struct nfs_client *); -extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state); -extern int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state); +extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); +extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); +extern int nfs4_schedule_migration_recovery(const struct nfs_server *); +extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *); extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags); -extern void nfs41_handle_recall_slot(struct nfs_client *clp); +extern void nfs41_handle_server_scope(struct nfs_client *, + struct nfs41_server_scope **); extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); -extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t); +extern int nfs4_select_rw_stateid(nfs4_stateid *, struct nfs4_state *, + fmode_t, const struct nfs_lockowner *); extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); @@ -328,10 +451,38 @@ extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); extern void nfs_release_seqid(struct nfs_seqid *seqid); extern void nfs_free_seqid(struct nfs_seqid *seqid); +extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp); + extern const nfs4_stateid zero_stateid; +/* nfs4super.c */ +struct nfs_mount_info; +extern struct nfs_subversion nfs_v4; +struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); +extern bool nfs4_disable_idmapping; +extern unsigned short max_session_slots; +extern unsigned short send_implementation_id; +extern bool recover_lost_locks; + +#define NFS4_CLIENT_ID_UNIQ_LEN (64) +extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; + +/* nfs4sysctl.c */ +#ifdef CONFIG_SYSCTL +int nfs4_register_sysctl(void); +void nfs4_unregister_sysctl(void); +#else +static inline int nfs4_register_sysctl(void) +{ + return 0; +} + +static inline void nfs4_unregister_sysctl(void) +{ +} +#endif + /* nfs4xdr.c */ -extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); extern struct rpc_procinfo nfs4_procedures[]; struct nfs4_mount_data; @@ -340,10 +491,37 @@ struct nfs4_mount_data; extern struct svc_version nfs4_callback_version1; extern struct svc_version nfs4_callback_version4; +static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src) +{ + memcpy(dst, src, sizeof(*dst)); +} + +static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src) +{ + return memcmp(dst, src, sizeof(*dst)) == 0; +} + +static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src) +{ + return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0; +} + +static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2) +{ + return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0; +} + +static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state) +{ + return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0; +} + #else -#define nfs4_close_state(a, b, c) do { } while (0) -#define nfs4_close_sync(a, b, c) do { } while (0) +#define nfs4_close_state(a, b) do { } while (0) +#define nfs4_close_sync(a, b) do { } while (0) +#define nfs4_state_protect(a, b, c, d) do { } while (0) +#define nfs4_state_protect_write(a, b, c, d) do { } while (0) #endif /* CONFIG_NFS_V4 */ #endif /* __LINUX_FS_NFS_NFS4_FS.H */ diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c new file mode 100644 index 00000000000..aa9ef487604 --- /dev/null +++ b/fs/nfs/nfs4client.c @@ -0,0 +1,1221 @@ +/* + * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ +#include <linux/module.h> +#include <linux/nfs_fs.h> +#include <linux/nfs_idmap.h> +#include <linux/nfs_mount.h> +#include <linux/sunrpc/addr.h> +#include <linux/sunrpc/auth.h> +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/bc_xprt.h> +#include <linux/sunrpc/rpc_pipe_fs.h> +#include "internal.h" +#include "callback.h" +#include "delegation.h" +#include "nfs4session.h" +#include "pnfs.h" +#include "netns.h" + +#define NFSDBG_FACILITY NFSDBG_CLIENT + +/* + * Get a unique NFSv4.0 callback identifier which will be used + * by the V4.0 callback service to lookup the nfs_client struct + */ +static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) +{ + int ret = 0; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + + if (clp->rpc_ops->version != 4 || minorversion != 0) + return ret; + idr_preload(GFP_KERNEL); + spin_lock(&nn->nfs_client_lock); + ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT); + if (ret >= 0) + clp->cl_cb_ident = ret; + spin_unlock(&nn->nfs_client_lock); + idr_preload_end(); + return ret < 0 ? ret : 0; +} + +#ifdef CONFIG_NFS_V4_1 +/** + * Per auth flavor data server rpc clients + */ +struct nfs4_ds_server { + struct list_head list; /* ds_clp->cl_ds_clients */ + struct rpc_clnt *rpc_clnt; +}; + +/** + * Common lookup case for DS I/O + */ +static struct nfs4_ds_server * +nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) +{ + struct nfs4_ds_server *dss; + + rcu_read_lock(); + list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { + if (dss->rpc_clnt->cl_auth->au_flavor != flavor) + continue; + goto out; + } + dss = NULL; +out: + rcu_read_unlock(); + return dss; +} + +static struct nfs4_ds_server * +nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, + struct nfs4_ds_server *new) +{ + struct nfs4_ds_server *dss; + + spin_lock(&ds_clp->cl_lock); + list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { + if (dss->rpc_clnt->cl_auth->au_flavor != flavor) + continue; + goto out; + } + if (new) + list_add_rcu(&new->list, &ds_clp->cl_ds_clients); + dss = new; +out: + spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ + return dss; +} + +static struct nfs4_ds_server * +nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) +{ + struct nfs4_ds_server *dss; + + dss = kmalloc(sizeof(*dss), GFP_NOFS); + if (dss == NULL) + return ERR_PTR(-ENOMEM); + + dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); + if (IS_ERR(dss->rpc_clnt)) { + int err = PTR_ERR(dss->rpc_clnt); + kfree (dss); + return ERR_PTR(err); + } + INIT_LIST_HEAD(&dss->list); + + return dss; +} + +static void +nfs4_free_ds_server(struct nfs4_ds_server *dss) +{ + rpc_release_client(dss->rpc_clnt); + kfree(dss); +} + +/** +* Find or create a DS rpc client with th MDS server rpc client auth flavor +* in the nfs_client cl_ds_clients list. +*/ +struct rpc_clnt * +nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) +{ + struct nfs4_ds_server *dss, *new; + rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; + + dss = nfs4_find_ds_client(ds_clp, flavor); + if (dss != NULL) + goto out; + new = nfs4_alloc_ds_server(ds_clp, flavor); + if (IS_ERR(new)) + return ERR_CAST(new); + dss = nfs4_add_ds_client(ds_clp, flavor, new); + if (dss != new) + nfs4_free_ds_server(new); +out: + return dss->rpc_clnt; +} +EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); + +static void +nfs4_shutdown_ds_clients(struct nfs_client *clp) +{ + struct nfs4_ds_server *dss; + LIST_HEAD(shutdown_list); + + while (!list_empty(&clp->cl_ds_clients)) { + dss = list_entry(clp->cl_ds_clients.next, + struct nfs4_ds_server, list); + list_del(&dss->list); + rpc_shutdown_client(dss->rpc_clnt); + kfree (dss); + } +} + +void nfs41_shutdown_client(struct nfs_client *clp) +{ + if (nfs4_has_session(clp)) { + nfs4_shutdown_ds_clients(clp); + nfs4_destroy_session(clp->cl_session); + nfs4_destroy_clientid(clp); + } + +} +#endif /* CONFIG_NFS_V4_1 */ + +void nfs40_shutdown_client(struct nfs_client *clp) +{ + if (clp->cl_slot_tbl) { + nfs4_shutdown_slot_table(clp->cl_slot_tbl); + kfree(clp->cl_slot_tbl); + } +} + +struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) +{ + int err; + struct nfs_client *clp = nfs_alloc_client(cl_init); + if (IS_ERR(clp)) + return clp; + + err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); + if (err) + goto error; + + if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { + err = -EINVAL; + goto error; + } + + spin_lock_init(&clp->cl_lock); + INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); + INIT_LIST_HEAD(&clp->cl_ds_clients); + rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); + clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; + clp->cl_minorversion = cl_init->minorversion; + clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; + clp->cl_mig_gen = 1; + return clp; + +error: + nfs_free_client(clp); + return ERR_PTR(err); +} + +/* + * Destroy the NFS4 callback service + */ +static void nfs4_destroy_callback(struct nfs_client *clp) +{ + if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) + nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); +} + +static void nfs4_shutdown_client(struct nfs_client *clp) +{ + if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) + nfs4_kill_renewd(clp); + clp->cl_mvops->shutdown_client(clp); + nfs4_destroy_callback(clp); + if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) + nfs_idmap_delete(clp); + + rpc_destroy_wait_queue(&clp->cl_rpcwaitq); + kfree(clp->cl_serverowner); + kfree(clp->cl_serverscope); + kfree(clp->cl_implid); +} + +void nfs4_free_client(struct nfs_client *clp) +{ + nfs4_shutdown_client(clp); + nfs_free_client(clp); +} + +/* + * Initialize the NFS4 callback service + */ +static int nfs4_init_callback(struct nfs_client *clp) +{ + int error; + + if (clp->rpc_ops->version == 4) { + struct rpc_xprt *xprt; + + xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); + + if (nfs4_has_session(clp)) { + error = xprt_setup_backchannel(xprt, + NFS41_BC_MIN_CALLBACKS); + if (error < 0) + return error; + } + + error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); + if (error < 0) { + dprintk("%s: failed to start callback. Error = %d\n", + __func__, error); + return error; + } + __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); + } + return 0; +} + +/** + * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 + * @clp - nfs_client to initialize + * + * Returns zero on success, or a negative errno if some error occurred. + */ +int nfs40_init_client(struct nfs_client *clp) +{ + struct nfs4_slot_table *tbl; + int ret; + + tbl = kzalloc(sizeof(*tbl), GFP_NOFS); + if (tbl == NULL) + return -ENOMEM; + + ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, + "NFSv4.0 transport Slot table"); + if (ret) { + kfree(tbl); + return ret; + } + + clp->cl_slot_tbl = tbl; + return 0; +} + +#if defined(CONFIG_NFS_V4_1) + +/** + * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ + * @clp - nfs_client to initialize + * + * Returns zero on success, or a negative errno if some error occurred. + */ +int nfs41_init_client(struct nfs_client *clp) +{ + struct nfs4_session *session = NULL; + + /* + * Create the session and mark it expired. + * When a SEQUENCE operation encounters the expired session + * it will do session recovery to initialize it. + */ + session = nfs4_alloc_session(clp); + if (!session) + return -ENOMEM; + + clp->cl_session = session; + + /* + * The create session reply races with the server back + * channel probe. Mark the client NFS_CS_SESSION_INITING + * so that the client back channel can find the + * nfs_client struct + */ + nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); + return 0; +} + +#endif /* CONFIG_NFS_V4_1 */ + +/* + * Initialize the minor version specific parts of an NFS4 client record + */ +static int nfs4_init_client_minor_version(struct nfs_client *clp) +{ + int ret; + + ret = clp->cl_mvops->init_client(clp); + if (ret) + return ret; + return nfs4_init_callback(clp); +} + +/** + * nfs4_init_client - Initialise an NFS4 client record + * + * @clp: nfs_client to initialise + * @timeparms: timeout parameters for underlying RPC transport + * @ip_addr: callback IP address in presentation format + * @authflavor: authentication flavor for underlying RPC transport + * + * Returns pointer to an NFS client, or an ERR_PTR value. + */ +struct nfs_client *nfs4_init_client(struct nfs_client *clp, + const struct rpc_timeout *timeparms, + const char *ip_addr) +{ + char buf[INET6_ADDRSTRLEN + 1]; + struct nfs_client *old; + int error; + + if (clp->cl_cons_state == NFS_CS_READY) { + /* the client is initialised already */ + dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); + return clp; + } + + /* Check NFS protocol revision and initialize RPC op vector */ + clp->rpc_ops = &nfs_v4_clientops; + + if (clp->cl_minorversion != 0) + __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); + __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); + __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); + + error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I); + if (error == -EINVAL) + error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); + if (error < 0) + goto error; + + /* If no clientaddr= option was specified, find a usable cb address */ + if (ip_addr == NULL) { + struct sockaddr_storage cb_addr; + struct sockaddr *sap = (struct sockaddr *)&cb_addr; + + error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); + if (error < 0) + goto error; + error = rpc_ntop(sap, buf, sizeof(buf)); + if (error < 0) + goto error; + ip_addr = (const char *)buf; + } + strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); + + error = nfs_idmap_new(clp); + if (error < 0) { + dprintk("%s: failed to create idmapper. Error = %d\n", + __func__, error); + goto error; + } + __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); + + error = nfs4_init_client_minor_version(clp); + if (error < 0) + goto error; + + if (!nfs4_has_session(clp)) + nfs_mark_client_ready(clp, NFS_CS_READY); + + error = nfs4_discover_server_trunking(clp, &old); + if (error < 0) + goto error; + + if (clp != old) + clp->cl_preserve_clid = true; + nfs_put_client(clp); + return old; + +error: + nfs_mark_client_ready(clp, error); + nfs_put_client(clp); + dprintk("<-- nfs4_init_client() = xerror %d\n", error); + return ERR_PTR(error); +} + +/* + * SETCLIENTID just did a callback update with the callback ident in + * "drop," but server trunking discovery claims "drop" and "keep" are + * actually the same server. Swap the callback IDs so that "keep" + * will continue to use the callback ident the server now knows about, + * and so that "keep"'s original callback ident is destroyed when + * "drop" is freed. + */ +static void nfs4_swap_callback_idents(struct nfs_client *keep, + struct nfs_client *drop) +{ + struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); + unsigned int save = keep->cl_cb_ident; + + if (keep->cl_cb_ident == drop->cl_cb_ident) + return; + + dprintk("%s: keeping callback ident %u and dropping ident %u\n", + __func__, keep->cl_cb_ident, drop->cl_cb_ident); + + spin_lock(&nn->nfs_client_lock); + + idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); + keep->cl_cb_ident = drop->cl_cb_ident; + + idr_replace(&nn->cb_ident_idr, drop, save); + drop->cl_cb_ident = save; + + spin_unlock(&nn->nfs_client_lock); +} + +/** + * nfs40_walk_client_list - Find server that recognizes a client ID + * + * @new: nfs_client with client ID to test + * @result: OUT: found nfs_client, or new + * @cred: credential to use for trunking test + * + * Returns zero, a negative errno, or a negative NFS4ERR status. + * If zero is returned, an nfs_client pointer is planted in "result." + * + * NB: nfs40_walk_client_list() relies on the new nfs_client being + * the last nfs_client on the list. + */ +int nfs40_walk_client_list(struct nfs_client *new, + struct nfs_client **result, + struct rpc_cred *cred) +{ + struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); + struct nfs_client *pos, *prev = NULL; + struct nfs4_setclientid_res clid = { + .clientid = new->cl_clientid, + .confirm = new->cl_confirm, + }; + int status = -NFS4ERR_STALE_CLIENTID; + + spin_lock(&nn->nfs_client_lock); + list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { + /* If "pos" isn't marked ready, we can't trust the + * remaining fields in "pos" */ + if (pos->cl_cons_state > NFS_CS_READY) { + atomic_inc(&pos->cl_count); + spin_unlock(&nn->nfs_client_lock); + + if (prev) + nfs_put_client(prev); + prev = pos; + + status = nfs_wait_client_init_complete(pos); + if (status < 0) + goto out; + status = -NFS4ERR_STALE_CLIENTID; + spin_lock(&nn->nfs_client_lock); + } + if (pos->cl_cons_state != NFS_CS_READY) + continue; + + if (pos->rpc_ops != new->rpc_ops) + continue; + + if (pos->cl_proto != new->cl_proto) + continue; + + if (pos->cl_minorversion != new->cl_minorversion) + continue; + + if (pos->cl_clientid != new->cl_clientid) + continue; + + atomic_inc(&pos->cl_count); + spin_unlock(&nn->nfs_client_lock); + + if (prev) + nfs_put_client(prev); + prev = pos; + + status = nfs4_proc_setclientid_confirm(pos, &clid, cred); + switch (status) { + case -NFS4ERR_STALE_CLIENTID: + break; + case 0: + nfs4_swap_callback_idents(pos, new); + + prev = NULL; + *result = pos; + dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", + __func__, pos, atomic_read(&pos->cl_count)); + goto out; + case -ERESTARTSYS: + case -ETIMEDOUT: + /* The callback path may have been inadvertently + * changed. Schedule recovery! + */ + nfs4_schedule_path_down_recovery(pos); + default: + goto out; + } + + spin_lock(&nn->nfs_client_lock); + } + spin_unlock(&nn->nfs_client_lock); + + /* No match found. The server lost our clientid */ +out: + if (prev) + nfs_put_client(prev); + dprintk("NFS: <-- %s status = %d\n", __func__, status); + return status; +} + +#ifdef CONFIG_NFS_V4_1 +/* + * Returns true if the client IDs match + */ +static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b) +{ + if (a->cl_clientid != b->cl_clientid) { + dprintk("NFS: --> %s client ID %llx does not match %llx\n", + __func__, a->cl_clientid, b->cl_clientid); + return false; + } + dprintk("NFS: --> %s client ID %llx matches %llx\n", + __func__, a->cl_clientid, b->cl_clientid); + return true; +} + +/* + * Returns true if the server owners match + */ +static bool +nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b) +{ + struct nfs41_server_owner *o1 = a->cl_serverowner; + struct nfs41_server_owner *o2 = b->cl_serverowner; + + if (o1->minor_id != o2->minor_id) { + dprintk("NFS: --> %s server owner minor IDs do not match\n", + __func__); + return false; + } + + if (o1->major_id_sz != o2->major_id_sz) + goto out_major_mismatch; + if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0) + goto out_major_mismatch; + + dprintk("NFS: --> %s server owners match\n", __func__); + return true; + +out_major_mismatch: + dprintk("NFS: --> %s server owner major IDs do not match\n", + __func__); + return false; +} + +/** + * nfs41_walk_client_list - Find nfs_client that matches a client/server owner + * + * @new: nfs_client with client ID to test + * @result: OUT: found nfs_client, or new + * @cred: credential to use for trunking test + * + * Returns zero, a negative errno, or a negative NFS4ERR status. + * If zero is returned, an nfs_client pointer is planted in "result." + * + * NB: nfs41_walk_client_list() relies on the new nfs_client being + * the last nfs_client on the list. + */ +int nfs41_walk_client_list(struct nfs_client *new, + struct nfs_client **result, + struct rpc_cred *cred) +{ + struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); + struct nfs_client *pos, *prev = NULL; + int status = -NFS4ERR_STALE_CLIENTID; + + spin_lock(&nn->nfs_client_lock); + list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { + /* If "pos" isn't marked ready, we can't trust the + * remaining fields in "pos", especially the client + * ID and serverowner fields. Wait for CREATE_SESSION + * to finish. */ + if (pos->cl_cons_state > NFS_CS_READY) { + atomic_inc(&pos->cl_count); + spin_unlock(&nn->nfs_client_lock); + + if (prev) + nfs_put_client(prev); + prev = pos; + + status = nfs_wait_client_init_complete(pos); + if (status == 0) { + nfs4_schedule_lease_recovery(pos); + status = nfs4_wait_clnt_recover(pos); + } + spin_lock(&nn->nfs_client_lock); + if (status < 0) + break; + status = -NFS4ERR_STALE_CLIENTID; + } + if (pos->cl_cons_state != NFS_CS_READY) + continue; + + if (pos->rpc_ops != new->rpc_ops) + continue; + + if (pos->cl_proto != new->cl_proto) + continue; + + if (pos->cl_minorversion != new->cl_minorversion) + continue; + + if (!nfs4_match_clientids(pos, new)) + continue; + + if (!nfs4_match_serverowners(pos, new)) + continue; + + atomic_inc(&pos->cl_count); + *result = pos; + status = 0; + dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n", + __func__, pos, atomic_read(&pos->cl_count)); + break; + } + + /* No matching nfs_client found. */ + spin_unlock(&nn->nfs_client_lock); + dprintk("NFS: <-- %s status = %d\n", __func__, status); + if (prev) + nfs_put_client(prev); + return status; +} +#endif /* CONFIG_NFS_V4_1 */ + +static void nfs4_destroy_server(struct nfs_server *server) +{ + nfs_server_return_all_delegations(server); + unset_pnfs_layoutdriver(server); + nfs4_purge_state_owners(server); +} + +/* + * NFSv4.0 callback thread helper + * + * Find a client by callback identifier + */ +struct nfs_client * +nfs4_find_client_ident(struct net *net, int cb_ident) +{ + struct nfs_client *clp; + struct nfs_net *nn = net_generic(net, nfs_net_id); + + spin_lock(&nn->nfs_client_lock); + clp = idr_find(&nn->cb_ident_idr, cb_ident); + if (clp) + atomic_inc(&clp->cl_count); + spin_unlock(&nn->nfs_client_lock); + return clp; +} + +#if defined(CONFIG_NFS_V4_1) +/* Common match routine for v4.0 and v4.1 callback services */ +static bool nfs4_cb_match_client(const struct sockaddr *addr, + struct nfs_client *clp, u32 minorversion) +{ + struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; + + /* Don't match clients that failed to initialise */ + if (!(clp->cl_cons_state == NFS_CS_READY || + clp->cl_cons_state == NFS_CS_SESSION_INITING)) + return false; + + smp_rmb(); + + /* Match the version and minorversion */ + if (clp->rpc_ops->version != 4 || + clp->cl_minorversion != minorversion) + return false; + + /* Match only the IP address, not the port number */ + if (!nfs_sockaddr_match_ipaddr(addr, clap)) + return false; + + return true; +} + +/* + * NFSv4.1 callback thread helper + * For CB_COMPOUND calls, find a client by IP address, protocol version, + * minorversion, and sessionID + * + * Returns NULL if no such client + */ +struct nfs_client * +nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, + struct nfs4_sessionid *sid, u32 minorversion) +{ + struct nfs_client *clp; + struct nfs_net *nn = net_generic(net, nfs_net_id); + + spin_lock(&nn->nfs_client_lock); + list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { + if (nfs4_cb_match_client(addr, clp, minorversion) == false) + continue; + + if (!nfs4_has_session(clp)) + continue; + + /* Match sessionid*/ + if (memcmp(clp->cl_session->sess_id.data, + sid->data, NFS4_MAX_SESSIONID_LEN) != 0) + continue; + + atomic_inc(&clp->cl_count); + spin_unlock(&nn->nfs_client_lock); + return clp; + } + spin_unlock(&nn->nfs_client_lock); + return NULL; +} + +#else /* CONFIG_NFS_V4_1 */ + +struct nfs_client * +nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, + struct nfs4_sessionid *sid, u32 minorversion) +{ + return NULL; +} +#endif /* CONFIG_NFS_V4_1 */ + +/* + * Set up an NFS4 client + */ +static int nfs4_set_client(struct nfs_server *server, + const char *hostname, + const struct sockaddr *addr, + const size_t addrlen, + const char *ip_addr, + rpc_authflavor_t authflavour, + int proto, const struct rpc_timeout *timeparms, + u32 minorversion, struct net *net) +{ + struct nfs_client_initdata cl_init = { + .hostname = hostname, + .addr = addr, + .addrlen = addrlen, + .nfs_mod = &nfs_v4, + .proto = proto, + .minorversion = minorversion, + .net = net, + }; + struct nfs_client *clp; + int error; + + dprintk("--> nfs4_set_client()\n"); + + if (server->flags & NFS_MOUNT_NORESVPORT) + set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); + if (server->options & NFS_OPTION_MIGRATION) + set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); + + /* Allocate or find a client reference we can use */ + clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour); + if (IS_ERR(clp)) { + error = PTR_ERR(clp); + goto error; + } + + /* + * Query for the lease time on clientid setup or renewal + * + * Note that this will be set on nfs_clients that were created + * only for the DS role and did not set this bit, but now will + * serve a dual role. + */ + set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); + + server->nfs_client = clp; + dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); + return 0; +error: + dprintk("<-- nfs4_set_client() = xerror %d\n", error); + return error; +} + +/* + * Set up a pNFS Data Server client. + * + * Return any existing nfs_client that matches server address,port,version + * and minorversion. + * + * For a new nfs_client, use a soft mount (default), a low retrans and a + * low timeout interval so that if a connection is lost, we retry through + * the MDS. + */ +struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, + const struct sockaddr *ds_addr, int ds_addrlen, + int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) +{ + struct nfs_client_initdata cl_init = { + .addr = ds_addr, + .addrlen = ds_addrlen, + .nfs_mod = &nfs_v4, + .proto = ds_proto, + .minorversion = mds_clp->cl_minorversion, + .net = mds_clp->cl_net, + }; + struct rpc_timeout ds_timeout; + struct nfs_client *clp; + + /* + * Set an authflavor equual to the MDS value. Use the MDS nfs_client + * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS + * (section 13.1 RFC 5661). + */ + nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); + clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, + mds_clp->cl_rpcclient->cl_auth->au_flavor); + + dprintk("<-- %s %p\n", __func__, clp); + return clp; +} +EXPORT_SYMBOL_GPL(nfs4_set_ds_client); + +/* + * Session has been established, and the client marked ready. + * Set the mount rsize and wsize with negotiated fore channel + * attributes which will be bound checked in nfs_server_set_fsinfo. + */ +static void nfs4_session_set_rwsize(struct nfs_server *server) +{ +#ifdef CONFIG_NFS_V4_1 + struct nfs4_session *sess; + u32 server_resp_sz; + u32 server_rqst_sz; + + if (!nfs4_has_session(server->nfs_client)) + return; + sess = server->nfs_client->cl_session; + server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; + server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; + + if (server->rsize > server_resp_sz) + server->rsize = server_resp_sz; + if (server->wsize > server_rqst_sz) + server->wsize = server_rqst_sz; +#endif /* CONFIG_NFS_V4_1 */ +} + +static int nfs4_server_common_setup(struct nfs_server *server, + struct nfs_fh *mntfh, bool auth_probe) +{ + struct nfs_fattr *fattr; + int error; + + /* data servers support only a subset of NFSv4.1 */ + if (is_ds_only_client(server->nfs_client)) + return -EPROTONOSUPPORT; + + fattr = nfs_alloc_fattr(); + if (fattr == NULL) + return -ENOMEM; + + /* We must ensure the session is initialised first */ + error = nfs4_init_session(server->nfs_client); + if (error < 0) + goto out; + + /* Set the basic capabilities */ + server->caps |= server->nfs_client->cl_mvops->init_caps; + if (server->flags & NFS_MOUNT_NORDIRPLUS) + server->caps &= ~NFS_CAP_READDIRPLUS; + /* + * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower + * authentication. + */ + if (nfs4_disable_idmapping && + server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) + server->caps |= NFS_CAP_UIDGID_NOMAP; + + + /* Probe the root fh to retrieve its FSID and filehandle */ + error = nfs4_get_rootfh(server, mntfh, auth_probe); + if (error < 0) + goto out; + + dprintk("Server FSID: %llx:%llx\n", + (unsigned long long) server->fsid.major, + (unsigned long long) server->fsid.minor); + nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); + + nfs4_session_set_rwsize(server); + + error = nfs_probe_fsinfo(server, mntfh, fattr); + if (error < 0) + goto out; + + if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) + server->namelen = NFS4_MAXNAMLEN; + + nfs_server_insert_lists(server); + server->mount_time = jiffies; + server->destroy = nfs4_destroy_server; +out: + nfs_free_fattr(fattr); + return error; +} + +/* + * Create a version 4 volume record + */ +static int nfs4_init_server(struct nfs_server *server, + struct nfs_parsed_mount_data *data) +{ + struct rpc_timeout timeparms; + int error; + + dprintk("--> nfs4_init_server()\n"); + + nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, + data->timeo, data->retrans); + + /* Initialise the client representation from the mount data */ + server->flags = data->flags; + server->options = data->options; + server->auth_info = data->auth_info; + + /* Use the first specified auth flavor. If this flavor isn't + * allowed by the server, use the SECINFO path to try the + * other specified flavors */ + if (data->auth_info.flavor_len >= 1) + data->selected_flavor = data->auth_info.flavors[0]; + else + data->selected_flavor = RPC_AUTH_UNIX; + + /* Get a client record */ + error = nfs4_set_client(server, + data->nfs_server.hostname, + (const struct sockaddr *)&data->nfs_server.address, + data->nfs_server.addrlen, + data->client_address, + data->selected_flavor, + data->nfs_server.protocol, + &timeparms, + data->minorversion, + data->net); + if (error < 0) + goto error; + + if (data->rsize) + server->rsize = nfs_block_size(data->rsize, NULL); + if (data->wsize) + server->wsize = nfs_block_size(data->wsize, NULL); + + server->acregmin = data->acregmin * HZ; + server->acregmax = data->acregmax * HZ; + server->acdirmin = data->acdirmin * HZ; + server->acdirmax = data->acdirmax * HZ; + + server->port = data->nfs_server.port; + + error = nfs_init_server_rpcclient(server, &timeparms, + data->selected_flavor); + +error: + /* Done */ + dprintk("<-- nfs4_init_server() = %d\n", error); + return error; +} + +/* + * Create a version 4 volume record + * - keyed on server and FSID + */ +/*struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, + struct nfs_fh *mntfh)*/ +struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) +{ + struct nfs_server *server; + bool auth_probe; + int error; + + dprintk("--> nfs4_create_server()\n"); + + server = nfs_alloc_server(); + if (!server) + return ERR_PTR(-ENOMEM); + + auth_probe = mount_info->parsed->auth_info.flavor_len < 1; + + /* set up the general RPC client */ + error = nfs4_init_server(server, mount_info->parsed); + if (error < 0) + goto error; + + error = nfs4_server_common_setup(server, mount_info->mntfh, auth_probe); + if (error < 0) + goto error; + + dprintk("<-- nfs4_create_server() = %p\n", server); + return server; + +error: + nfs_free_server(server); + dprintk("<-- nfs4_create_server() = error %d\n", error); + return ERR_PTR(error); +} + +/* + * Create an NFS4 referral server record + */ +struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, + struct nfs_fh *mntfh) +{ + struct nfs_client *parent_client; + struct nfs_server *server, *parent_server; + bool auth_probe; + int error; + + dprintk("--> nfs4_create_referral_server()\n"); + + server = nfs_alloc_server(); + if (!server) + return ERR_PTR(-ENOMEM); + + parent_server = NFS_SB(data->sb); + parent_client = parent_server->nfs_client; + + /* Initialise the client representation from the parent server */ + nfs_server_copy_userdata(server, parent_server); + + /* Get a client representation. + * Note: NFSv4 always uses TCP, */ + error = nfs4_set_client(server, data->hostname, + data->addr, + data->addrlen, + parent_client->cl_ipaddr, + data->authflavor, + rpc_protocol(parent_server->client), + parent_server->client->cl_timeout, + parent_client->cl_mvops->minor_version, + parent_client->cl_net); + if (error < 0) + goto error; + + error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); + if (error < 0) + goto error; + + auth_probe = parent_server->auth_info.flavor_len < 1; + + error = nfs4_server_common_setup(server, mntfh, auth_probe); + if (error < 0) + goto error; + + dprintk("<-- nfs_create_referral_server() = %p\n", server); + return server; + +error: + nfs_free_server(server); + dprintk("<-- nfs4_create_referral_server() = error %d\n", error); + return ERR_PTR(error); +} + +/* + * Grab the destination's particulars, including lease expiry time. + * + * Returns zero if probe succeeded and retrieved FSID matches the FSID + * we have cached. + */ +static int nfs_probe_destination(struct nfs_server *server) +{ + struct inode *inode = server->super->s_root->d_inode; + struct nfs_fattr *fattr; + int error; + + fattr = nfs_alloc_fattr(); + if (fattr == NULL) + return -ENOMEM; + + /* Sanity: the probe won't work if the destination server + * does not recognize the migrated FH. */ + error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); + + nfs_free_fattr(fattr); + return error; +} + +/** + * nfs4_update_server - Move an nfs_server to a different nfs_client + * + * @server: represents FSID to be moved + * @hostname: new end-point's hostname + * @sap: new end-point's socket address + * @salen: size of "sap" + * @net: net namespace + * + * The nfs_server must be quiescent before this function is invoked. + * Either its session is drained (NFSv4.1+), or its transport is + * plugged and drained (NFSv4.0). + * + * Returns zero on success, or a negative errno value. + */ +int nfs4_update_server(struct nfs_server *server, const char *hostname, + struct sockaddr *sap, size_t salen, struct net *net) +{ + struct nfs_client *clp = server->nfs_client; + struct rpc_clnt *clnt = server->client; + struct xprt_create xargs = { + .ident = clp->cl_proto, + .net = net, + .dstaddr = sap, + .addrlen = salen, + .servername = hostname, + }; + char buf[INET6_ADDRSTRLEN + 1]; + struct sockaddr_storage address; + struct sockaddr *localaddr = (struct sockaddr *)&address; + int error; + + dprintk("--> %s: move FSID %llx:%llx to \"%s\")\n", __func__, + (unsigned long long)server->fsid.major, + (unsigned long long)server->fsid.minor, + hostname); + + error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); + if (error != 0) { + dprintk("<-- %s(): rpc_switch_client_transport returned %d\n", + __func__, error); + goto out; + } + + error = rpc_localaddr(clnt, localaddr, sizeof(address)); + if (error != 0) { + dprintk("<-- %s(): rpc_localaddr returned %d\n", + __func__, error); + goto out; + } + + error = -EAFNOSUPPORT; + if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) { + dprintk("<-- %s(): rpc_ntop returned %d\n", + __func__, error); + goto out; + } + + nfs_server_remove_lists(server); + error = nfs4_set_client(server, hostname, sap, salen, buf, + clp->cl_rpcclient->cl_auth->au_flavor, + clp->cl_proto, clnt->cl_timeout, + clp->cl_minorversion, net); + nfs_put_client(clp); + if (error != 0) { + nfs_server_insert_lists(server); + dprintk("<-- %s(): nfs4_set_client returned %d\n", + __func__, error); + goto out; + } + + if (server->nfs_client->cl_hostname == NULL) + server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); + nfs_server_insert_lists(server); + + error = nfs_probe_destination(server); + if (error < 0) + goto out; + + dprintk("<-- %s() succeeded\n", __func__); + +out: + return error; +} diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c new file mode 100644 index 00000000000..a816f0627a6 --- /dev/null +++ b/fs/nfs/nfs4file.c @@ -0,0 +1,135 @@ +/* + * linux/fs/nfs/file.c + * + * Copyright (C) 1992 Rick Sladkey + */ +#include <linux/nfs_fs.h> +#include "internal.h" +#include "fscache.h" +#include "pnfs.h" + +#define NFSDBG_FACILITY NFSDBG_FILE + +static int +nfs4_file_open(struct inode *inode, struct file *filp) +{ + struct nfs_open_context *ctx; + struct dentry *dentry = filp->f_path.dentry; + struct dentry *parent = NULL; + struct inode *dir; + unsigned openflags = filp->f_flags; + struct iattr attr; + int opened = 0; + int err; + + /* + * If no cached dentry exists or if it's negative, NFSv4 handled the + * opens in ->lookup() or ->create(). + * + * We only get this far for a cached positive dentry. We skipped + * revalidation, so handle it here by dropping the dentry and returning + * -EOPENSTALE. The VFS will retry the lookup/create/open. + */ + + dprintk("NFS: open file(%pd2)\n", dentry); + + if ((openflags & O_ACCMODE) == 3) + openflags--; + + /* We can't create new files here */ + openflags &= ~(O_CREAT|O_EXCL); + + parent = dget_parent(dentry); + dir = parent->d_inode; + + ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); + err = PTR_ERR(ctx); + if (IS_ERR(ctx)) + goto out; + + attr.ia_valid = ATTR_OPEN; + if (openflags & O_TRUNC) { + attr.ia_valid |= ATTR_SIZE; + attr.ia_size = 0; + nfs_wb_all(inode); + } + + inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr, &opened); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + switch (err) { + case -EPERM: + case -EACCES: + case -EDQUOT: + case -ENOSPC: + case -EROFS: + goto out_put_ctx; + default: + goto out_drop; + } + } + if (inode != dentry->d_inode) + goto out_drop; + + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_file_set_open_context(filp, ctx); + nfs_fscache_open_file(inode, filp); + err = 0; + +out_put_ctx: + put_nfs_open_context(ctx); +out: + dput(parent); + return err; + +out_drop: + d_drop(dentry); + err = -EOPENSTALE; + goto out_put_ctx; +} + +static int +nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync) +{ + int ret; + struct inode *inode = file_inode(file); + + do { + ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + if (ret != 0) + break; + mutex_lock(&inode->i_mutex); + ret = nfs_file_fsync_commit(file, start, end, datasync); + if (!ret) + ret = pnfs_layoutcommit_inode(inode, true); + mutex_unlock(&inode->i_mutex); + /* + * If nfs_file_fsync_commit detected a server reboot, then + * resend all dirty pages that might have been covered by + * the NFS_CONTEXT_RESEND_WRITES flag + */ + start = 0; + end = LLONG_MAX; + } while (ret == -EAGAIN); + + return ret; +} + +const struct file_operations nfs4_file_operations = { + .llseek = nfs_file_llseek, + .read = new_sync_read, + .write = new_sync_write, + .read_iter = nfs_file_read, + .write_iter = nfs_file_write, + .mmap = nfs_file_mmap, + .open = nfs4_file_open, + .flush = nfs_file_flush, + .release = nfs_file_release, + .fsync = nfs4_file_fsync, + .lock = nfs_lock, + .flock = nfs_flock, + .splice_read = nfs_file_splice_read, + .splice_write = iter_file_splice_write, + .check_flags = nfs_check_flags, + .setlease = nfs_setlease, +}; diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c deleted file mode 100644 index 2e92f0d8d65..00000000000 --- a/fs/nfs/nfs4filelayout.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Module for the pnfs nfs4 file layout driver. - * Defines all I/O and Policy interface operations, plus code - * to register itself with the pNFS client. - * - * Copyright (c) 2002 - * The Regents of the University of Michigan - * All Rights Reserved - * - * Dean Hildebrand <dhildebz@umich.edu> - * - * Permission is granted to use, copy, create derivative works, and - * redistribute this software and such derivative works for any purpose, - * so long as the name of the University of Michigan is not used in - * any advertising or publicity pertaining to the use or distribution - * of this software without specific, written prior authorization. If - * the above copyright notice or any other identification of the - * University of Michigan is included in any copy of any portion of - * this software, then the disclaimer below must also be included. - * - * This software is provided as is, without representation or warranty - * of any kind either express or implied, including without limitation - * the implied warranties of merchantability, fitness for a particular - * purpose, or noninfringement. The Regents of the University of - * Michigan shall not be liable for any damages, including special, - * indirect, incidental, or consequential damages, with respect to any - * claim arising out of or in connection with the use of the software, - * even if it has been or is hereafter advised of the possibility of - * such damages. - */ - -#include <linux/nfs_fs.h> - -#include "internal.h" -#include "nfs4filelayout.h" - -#define NFSDBG_FACILITY NFSDBG_PNFS_LD - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>"); -MODULE_DESCRIPTION("The NFSv4 file layout driver"); - -static int -filelayout_set_layoutdriver(struct nfs_server *nfss) -{ - int status = pnfs_alloc_init_deviceid_cache(nfss->nfs_client, - nfs4_fl_free_deviceid_callback); - if (status) { - printk(KERN_WARNING "%s: deviceid cache could not be " - "initialized\n", __func__); - return status; - } - dprintk("%s: deviceid cache has been initialized successfully\n", - __func__); - return 0; -} - -/* Clear out the layout by destroying its device list */ -static int -filelayout_clear_layoutdriver(struct nfs_server *nfss) -{ - dprintk("--> %s\n", __func__); - - if (nfss->nfs_client->cl_devid_cache) - pnfs_put_deviceid_cache(nfss->nfs_client); - return 0; -} - -/* - * filelayout_check_layout() - * - * Make sure layout segment parameters are sane WRT the device. - * At this point no generic layer initialization of the lseg has occurred, - * and nothing has been added to the layout_hdr cache. - * - */ -static int -filelayout_check_layout(struct pnfs_layout_hdr *lo, - struct nfs4_filelayout_segment *fl, - struct nfs4_layoutget_res *lgr, - struct nfs4_deviceid *id) -{ - struct nfs4_file_layout_dsaddr *dsaddr; - int status = -EINVAL; - struct nfs_server *nfss = NFS_SERVER(lo->inode); - - dprintk("--> %s\n", __func__); - - if (fl->pattern_offset > lgr->range.offset) { - dprintk("%s pattern_offset %lld to large\n", - __func__, fl->pattern_offset); - goto out; - } - - if (fl->stripe_unit % PAGE_SIZE) { - dprintk("%s Stripe unit (%u) not page aligned\n", - __func__, fl->stripe_unit); - goto out; - } - - /* find and reference the deviceid */ - dsaddr = nfs4_fl_find_get_deviceid(nfss->nfs_client, id); - if (dsaddr == NULL) { - dsaddr = get_device_info(lo->inode, id); - if (dsaddr == NULL) - goto out; - } - fl->dsaddr = dsaddr; - - if (fl->first_stripe_index < 0 || - fl->first_stripe_index >= dsaddr->stripe_count) { - dprintk("%s Bad first_stripe_index %d\n", - __func__, fl->first_stripe_index); - goto out_put; - } - - if ((fl->stripe_type == STRIPE_SPARSE && - fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) || - (fl->stripe_type == STRIPE_DENSE && - fl->num_fh != dsaddr->stripe_count)) { - dprintk("%s num_fh %u not valid for given packing\n", - __func__, fl->num_fh); - goto out_put; - } - - if (fl->stripe_unit % nfss->rsize || fl->stripe_unit % nfss->wsize) { - dprintk("%s Stripe unit (%u) not aligned with rsize %u " - "wsize %u\n", __func__, fl->stripe_unit, nfss->rsize, - nfss->wsize); - } - - status = 0; -out: - dprintk("--> %s returns %d\n", __func__, status); - return status; -out_put: - pnfs_put_deviceid(nfss->nfs_client->cl_devid_cache, &dsaddr->deviceid); - goto out; -} - -static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl) -{ - int i; - - for (i = 0; i < fl->num_fh; i++) { - if (!fl->fh_array[i]) - break; - kfree(fl->fh_array[i]); - } - kfree(fl->fh_array); - fl->fh_array = NULL; -} - -static void -_filelayout_free_lseg(struct nfs4_filelayout_segment *fl) -{ - filelayout_free_fh_array(fl); - kfree(fl); -} - -static int -filelayout_decode_layout(struct pnfs_layout_hdr *flo, - struct nfs4_filelayout_segment *fl, - struct nfs4_layoutget_res *lgr, - struct nfs4_deviceid *id) -{ - uint32_t *p = (uint32_t *)lgr->layout.buf; - uint32_t nfl_util; - int i; - - dprintk("%s: set_layout_map Begin\n", __func__); - - memcpy(id, p, sizeof(*id)); - p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE); - print_deviceid(id); - - nfl_util = be32_to_cpup(p++); - if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS) - fl->commit_through_mds = 1; - if (nfl_util & NFL4_UFLG_DENSE) - fl->stripe_type = STRIPE_DENSE; - else - fl->stripe_type = STRIPE_SPARSE; - fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK; - - fl->first_stripe_index = be32_to_cpup(p++); - p = xdr_decode_hyper(p, &fl->pattern_offset); - fl->num_fh = be32_to_cpup(p++); - - dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n", - __func__, nfl_util, fl->num_fh, fl->first_stripe_index, - fl->pattern_offset); - - fl->fh_array = kzalloc(fl->num_fh * sizeof(struct nfs_fh *), - GFP_KERNEL); - if (!fl->fh_array) - return -ENOMEM; - - for (i = 0; i < fl->num_fh; i++) { - /* Do we want to use a mempool here? */ - fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL); - if (!fl->fh_array[i]) { - filelayout_free_fh_array(fl); - return -ENOMEM; - } - fl->fh_array[i]->size = be32_to_cpup(p++); - if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) { - printk(KERN_ERR "Too big fh %d received %d\n", - i, fl->fh_array[i]->size); - filelayout_free_fh_array(fl); - return -EIO; - } - memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size); - p += XDR_QUADLEN(fl->fh_array[i]->size); - dprintk("DEBUG: %s: fh len %d\n", __func__, - fl->fh_array[i]->size); - } - - return 0; -} - -static struct pnfs_layout_segment * -filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, - struct nfs4_layoutget_res *lgr) -{ - struct nfs4_filelayout_segment *fl; - int rc; - struct nfs4_deviceid id; - - dprintk("--> %s\n", __func__); - fl = kzalloc(sizeof(*fl), GFP_KERNEL); - if (!fl) - return NULL; - - rc = filelayout_decode_layout(layoutid, fl, lgr, &id); - if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id)) { - _filelayout_free_lseg(fl); - return NULL; - } - return &fl->generic_hdr; -} - -static void -filelayout_free_lseg(struct pnfs_layout_segment *lseg) -{ - struct nfs_server *nfss = NFS_SERVER(lseg->layout->inode); - struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); - - dprintk("--> %s\n", __func__); - pnfs_put_deviceid(nfss->nfs_client->cl_devid_cache, - &fl->dsaddr->deviceid); - _filelayout_free_lseg(fl); -} - -static struct pnfs_layoutdriver_type filelayout_type = { - .id = LAYOUT_NFSV4_1_FILES, - .name = "LAYOUT_NFSV4_1_FILES", - .owner = THIS_MODULE, - .set_layoutdriver = filelayout_set_layoutdriver, - .clear_layoutdriver = filelayout_clear_layoutdriver, - .alloc_lseg = filelayout_alloc_lseg, - .free_lseg = filelayout_free_lseg, -}; - -static int __init nfs4filelayout_init(void) -{ - printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n", - __func__); - return pnfs_register_layoutdriver(&filelayout_type); -} - -static void __exit nfs4filelayout_exit(void) -{ - printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n", - __func__); - pnfs_unregister_layoutdriver(&filelayout_type); -} - -module_init(nfs4filelayout_init); -module_exit(nfs4filelayout_exit); diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c deleted file mode 100644 index 51fe64ace55..00000000000 --- a/fs/nfs/nfs4filelayoutdev.c +++ /dev/null @@ -1,448 +0,0 @@ -/* - * Device operations for the pnfs nfs4 file layout driver. - * - * Copyright (c) 2002 - * The Regents of the University of Michigan - * All Rights Reserved - * - * Dean Hildebrand <dhildebz@umich.edu> - * Garth Goodson <Garth.Goodson@netapp.com> - * - * Permission is granted to use, copy, create derivative works, and - * redistribute this software and such derivative works for any purpose, - * so long as the name of the University of Michigan is not used in - * any advertising or publicity pertaining to the use or distribution - * of this software without specific, written prior authorization. If - * the above copyright notice or any other identification of the - * University of Michigan is included in any copy of any portion of - * this software, then the disclaimer below must also be included. - * - * This software is provided as is, without representation or warranty - * of any kind either express or implied, including without limitation - * the implied warranties of merchantability, fitness for a particular - * purpose, or noninfringement. The Regents of the University of - * Michigan shall not be liable for any damages, including special, - * indirect, incidental, or consequential damages, with respect to any - * claim arising out of or in connection with the use of the software, - * even if it has been or is hereafter advised of the possibility of - * such damages. - */ - -#include <linux/nfs_fs.h> -#include <linux/vmalloc.h> - -#include "internal.h" -#include "nfs4filelayout.h" - -#define NFSDBG_FACILITY NFSDBG_PNFS_LD - -/* - * Data server cache - * - * Data servers can be mapped to different device ids. - * nfs4_pnfs_ds reference counting - * - set to 1 on allocation - * - incremented when a device id maps a data server already in the cache. - * - decremented when deviceid is removed from the cache. - */ -DEFINE_SPINLOCK(nfs4_ds_cache_lock); -static LIST_HEAD(nfs4_data_server_cache); - -/* Debug routines */ -void -print_ds(struct nfs4_pnfs_ds *ds) -{ - if (ds == NULL) { - printk("%s NULL device\n", __func__); - return; - } - printk(" ip_addr %x port %hu\n" - " ref count %d\n" - " client %p\n" - " cl_exchange_flags %x\n", - ntohl(ds->ds_ip_addr), ntohs(ds->ds_port), - atomic_read(&ds->ds_count), ds->ds_clp, - ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0); -} - -void -print_ds_list(struct nfs4_file_layout_dsaddr *dsaddr) -{ - int i; - - ifdebug(FACILITY) { - printk("%s dsaddr->ds_num %d\n", __func__, - dsaddr->ds_num); - for (i = 0; i < dsaddr->ds_num; i++) - print_ds(dsaddr->ds_list[i]); - } -} - -void print_deviceid(struct nfs4_deviceid *id) -{ - u32 *p = (u32 *)id; - - dprintk("%s: device id= [%x%x%x%x]\n", __func__, - p[0], p[1], p[2], p[3]); -} - -/* nfs4_ds_cache_lock is held */ -static struct nfs4_pnfs_ds * -_data_server_lookup_locked(u32 ip_addr, u32 port) -{ - struct nfs4_pnfs_ds *ds; - - dprintk("_data_server_lookup: ip_addr=%x port=%hu\n", - ntohl(ip_addr), ntohs(port)); - - list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) { - if (ds->ds_ip_addr == ip_addr && - ds->ds_port == port) { - return ds; - } - } - return NULL; -} - -static void -destroy_ds(struct nfs4_pnfs_ds *ds) -{ - dprintk("--> %s\n", __func__); - ifdebug(FACILITY) - print_ds(ds); - - if (ds->ds_clp) - nfs_put_client(ds->ds_clp); - kfree(ds); -} - -static void -nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) -{ - struct nfs4_pnfs_ds *ds; - int i; - - print_deviceid(&dsaddr->deviceid.de_id); - - for (i = 0; i < dsaddr->ds_num; i++) { - ds = dsaddr->ds_list[i]; - if (ds != NULL) { - if (atomic_dec_and_lock(&ds->ds_count, - &nfs4_ds_cache_lock)) { - list_del_init(&ds->ds_node); - spin_unlock(&nfs4_ds_cache_lock); - destroy_ds(ds); - } - } - } - kfree(dsaddr->stripe_indices); - kfree(dsaddr); -} - -void -nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *device) -{ - struct nfs4_file_layout_dsaddr *dsaddr = - container_of(device, struct nfs4_file_layout_dsaddr, deviceid); - - nfs4_fl_free_deviceid(dsaddr); -} - -static struct nfs4_pnfs_ds * -nfs4_pnfs_ds_add(struct inode *inode, u32 ip_addr, u32 port) -{ - struct nfs4_pnfs_ds *tmp_ds, *ds; - - ds = kzalloc(sizeof(*tmp_ds), GFP_KERNEL); - if (!ds) - goto out; - - spin_lock(&nfs4_ds_cache_lock); - tmp_ds = _data_server_lookup_locked(ip_addr, port); - if (tmp_ds == NULL) { - ds->ds_ip_addr = ip_addr; - ds->ds_port = port; - atomic_set(&ds->ds_count, 1); - INIT_LIST_HEAD(&ds->ds_node); - ds->ds_clp = NULL; - list_add(&ds->ds_node, &nfs4_data_server_cache); - dprintk("%s add new data server ip 0x%x\n", __func__, - ds->ds_ip_addr); - } else { - kfree(ds); - atomic_inc(&tmp_ds->ds_count); - dprintk("%s data server found ip 0x%x, inc'ed ds_count to %d\n", - __func__, tmp_ds->ds_ip_addr, - atomic_read(&tmp_ds->ds_count)); - ds = tmp_ds; - } - spin_unlock(&nfs4_ds_cache_lock); -out: - return ds; -} - -/* - * Currently only support ipv4, and one multi-path address. - */ -static struct nfs4_pnfs_ds * -decode_and_add_ds(__be32 **pp, struct inode *inode) -{ - struct nfs4_pnfs_ds *ds = NULL; - char *buf; - const char *ipend, *pstr; - u32 ip_addr, port; - int nlen, rlen, i; - int tmp[2]; - __be32 *r_netid, *r_addr, *p = *pp; - - /* r_netid */ - nlen = be32_to_cpup(p++); - r_netid = p; - p += XDR_QUADLEN(nlen); - - /* r_addr */ - rlen = be32_to_cpup(p++); - r_addr = p; - p += XDR_QUADLEN(rlen); - *pp = p; - - /* Check that netid is "tcp" */ - if (nlen != 3 || memcmp((char *)r_netid, "tcp", 3)) { - dprintk("%s: ERROR: non ipv4 TCP r_netid\n", __func__); - goto out_err; - } - - /* ipv6 length plus port is legal */ - if (rlen > INET6_ADDRSTRLEN + 8) { - dprintk("%s Invalid address, length %d\n", __func__, - rlen); - goto out_err; - } - buf = kmalloc(rlen + 1, GFP_KERNEL); - buf[rlen] = '\0'; - memcpy(buf, r_addr, rlen); - - /* replace the port dots with dashes for the in4_pton() delimiter*/ - for (i = 0; i < 2; i++) { - char *res = strrchr(buf, '.'); - *res = '-'; - } - - /* Currently only support ipv4 address */ - if (in4_pton(buf, rlen, (u8 *)&ip_addr, '-', &ipend) == 0) { - dprintk("%s: Only ipv4 addresses supported\n", __func__); - goto out_free; - } - - /* port */ - pstr = ipend; - sscanf(pstr, "-%d-%d", &tmp[0], &tmp[1]); - port = htons((tmp[0] << 8) | (tmp[1])); - - ds = nfs4_pnfs_ds_add(inode, ip_addr, port); - dprintk("%s Decoded address and port %s\n", __func__, buf); -out_free: - kfree(buf); -out_err: - return ds; -} - -/* Decode opaque device data and return the result */ -static struct nfs4_file_layout_dsaddr* -decode_device(struct inode *ino, struct pnfs_device *pdev) -{ - int i, dummy; - u32 cnt, num; - u8 *indexp; - __be32 *p = (__be32 *)pdev->area, *indicesp; - struct nfs4_file_layout_dsaddr *dsaddr; - - /* Get the stripe count (number of stripe index) */ - cnt = be32_to_cpup(p++); - dprintk("%s stripe count %d\n", __func__, cnt); - if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) { - printk(KERN_WARNING "%s: stripe count %d greater than " - "supported maximum %d\n", __func__, - cnt, NFS4_PNFS_MAX_STRIPE_CNT); - goto out_err; - } - - /* Check the multipath list count */ - indicesp = p; - p += XDR_QUADLEN(cnt << 2); - num = be32_to_cpup(p++); - dprintk("%s ds_num %u\n", __func__, num); - if (num > NFS4_PNFS_MAX_MULTI_CNT) { - printk(KERN_WARNING "%s: multipath count %d greater than " - "supported maximum %d\n", __func__, - num, NFS4_PNFS_MAX_MULTI_CNT); - goto out_err; - } - dsaddr = kzalloc(sizeof(*dsaddr) + - (sizeof(struct nfs4_pnfs_ds *) * (num - 1)), - GFP_KERNEL); - if (!dsaddr) - goto out_err; - - dsaddr->stripe_indices = kzalloc(sizeof(u8) * cnt, GFP_KERNEL); - if (!dsaddr->stripe_indices) - goto out_err_free; - - dsaddr->stripe_count = cnt; - dsaddr->ds_num = num; - - memcpy(&dsaddr->deviceid.de_id, &pdev->dev_id, sizeof(pdev->dev_id)); - - /* Go back an read stripe indices */ - p = indicesp; - indexp = &dsaddr->stripe_indices[0]; - for (i = 0; i < dsaddr->stripe_count; i++) { - *indexp = be32_to_cpup(p++); - if (*indexp >= num) - goto out_err_free; - indexp++; - } - /* Skip already read multipath list count */ - p++; - - for (i = 0; i < dsaddr->ds_num; i++) { - int j; - - dummy = be32_to_cpup(p++); /* multipath count */ - if (dummy > 1) { - printk(KERN_WARNING - "%s: Multipath count %d not supported, " - "skipping all greater than 1\n", __func__, - dummy); - } - for (j = 0; j < dummy; j++) { - if (j == 0) { - dsaddr->ds_list[i] = decode_and_add_ds(&p, ino); - if (dsaddr->ds_list[i] == NULL) - goto out_err_free; - } else { - u32 len; - /* skip extra multipath */ - len = be32_to_cpup(p++); - p += XDR_QUADLEN(len); - len = be32_to_cpup(p++); - p += XDR_QUADLEN(len); - continue; - } - } - } - return dsaddr; - -out_err_free: - nfs4_fl_free_deviceid(dsaddr); -out_err: - dprintk("%s ERROR: returning NULL\n", __func__); - return NULL; -} - -/* - * Decode the opaque device specified in 'dev' - * and add it to the list of available devices. - * If the deviceid is already cached, nfs4_add_deviceid will return - * a pointer to the cached struct and throw away the new. - */ -static struct nfs4_file_layout_dsaddr* -decode_and_add_device(struct inode *inode, struct pnfs_device *dev) -{ - struct nfs4_file_layout_dsaddr *dsaddr; - struct pnfs_deviceid_node *d; - - dsaddr = decode_device(inode, dev); - if (!dsaddr) { - printk(KERN_WARNING "%s: Could not decode or add device\n", - __func__); - return NULL; - } - - d = pnfs_add_deviceid(NFS_SERVER(inode)->nfs_client->cl_devid_cache, - &dsaddr->deviceid); - - return container_of(d, struct nfs4_file_layout_dsaddr, deviceid); -} - -/* - * Retrieve the information for dev_id, add it to the list - * of available devices, and return it. - */ -struct nfs4_file_layout_dsaddr * -get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id) -{ - struct pnfs_device *pdev = NULL; - u32 max_resp_sz; - int max_pages; - struct page **pages = NULL; - struct nfs4_file_layout_dsaddr *dsaddr = NULL; - int rc, i; - struct nfs_server *server = NFS_SERVER(inode); - - /* - * Use the session max response size as the basis for setting - * GETDEVICEINFO's maxcount - */ - max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; - max_pages = max_resp_sz >> PAGE_SHIFT; - dprintk("%s inode %p max_resp_sz %u max_pages %d\n", - __func__, inode, max_resp_sz, max_pages); - - pdev = kzalloc(sizeof(struct pnfs_device), GFP_KERNEL); - if (pdev == NULL) - return NULL; - - pages = kzalloc(max_pages * sizeof(struct page *), GFP_KERNEL); - if (pages == NULL) { - kfree(pdev); - return NULL; - } - for (i = 0; i < max_pages; i++) { - pages[i] = alloc_page(GFP_KERNEL); - if (!pages[i]) - goto out_free; - } - - /* set pdev->area */ - pdev->area = vmap(pages, max_pages, VM_MAP, PAGE_KERNEL); - if (!pdev->area) - goto out_free; - - memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id)); - pdev->layout_type = LAYOUT_NFSV4_1_FILES; - pdev->pages = pages; - pdev->pgbase = 0; - pdev->pglen = PAGE_SIZE * max_pages; - pdev->mincount = 0; - - rc = nfs4_proc_getdeviceinfo(server, pdev); - dprintk("%s getdevice info returns %d\n", __func__, rc); - if (rc) - goto out_free; - - /* - * Found new device, need to decode it and then add it to the - * list of known devices for this mountpoint. - */ - dsaddr = decode_and_add_device(inode, pdev); -out_free: - if (pdev->area != NULL) - vunmap(pdev->area); - for (i = 0; i < max_pages; i++) - __free_page(pages[i]); - kfree(pages); - kfree(pdev); - dprintk("<-- %s dsaddr %p\n", __func__, dsaddr); - return dsaddr; -} - -struct nfs4_file_layout_dsaddr * -nfs4_fl_find_get_deviceid(struct nfs_client *clp, struct nfs4_deviceid *id) -{ - struct pnfs_deviceid_node *d; - - d = pnfs_find_get_deviceid(clp->cl_devid_cache, id); - return (d == NULL) ? NULL : - container_of(d, struct nfs4_file_layout_dsaddr, deviceid); -} diff --git a/fs/nfs/nfs4getroot.c b/fs/nfs/nfs4getroot.c new file mode 100644 index 00000000000..c0b3a16b4a0 --- /dev/null +++ b/fs/nfs/nfs4getroot.c @@ -0,0 +1,50 @@ +/* +* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. +* Written by David Howells (dhowells@redhat.com) +*/ + +#include <linux/nfs_fs.h> +#include "nfs4_fs.h" +#include "internal.h" + +#define NFSDBG_FACILITY NFSDBG_CLIENT + +int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe) +{ + struct nfs_fsinfo fsinfo; + int ret = -ENOMEM; + + dprintk("--> nfs4_get_rootfh()\n"); + + fsinfo.fattr = nfs_alloc_fattr(); + if (fsinfo.fattr == NULL) + goto out; + + /* Start by getting the root filehandle from the server */ + ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo, auth_probe); + if (ret < 0) { + dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret); + goto out; + } + + if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE) + || !S_ISDIR(fsinfo.fattr->mode)) { + printk(KERN_ERR "nfs4_get_rootfh:" + " getroot encountered non-directory\n"); + ret = -ENOTDIR; + goto out; + } + + if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { + printk(KERN_ERR "nfs4_get_rootfh:" + " getroot obtained referral\n"); + ret = -EREMOTE; + goto out; + } + + memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid)); +out: + nfs_free_fattr(fsinfo.fattr); + dprintk("<-- nfs4_get_rootfh() = %d\n", ret); + return ret; +} diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 3c2a1724fbd..3d83cb1fdc7 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -11,9 +11,11 @@ #include <linux/mount.h> #include <linux/namei.h> #include <linux/nfs_fs.h> +#include <linux/nfs_mount.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/addr.h> #include <linux/vfs.h> #include <linux/inet.h> #include "internal.h" @@ -52,35 +54,56 @@ Elong: } /* - * Determine the mount path as a string + * return the path component of "<server>:<path>" + * nfspath - the "<server>:<path>" string + * end - one past the last char that could contain "<server>:" + * returns NULL on failure */ -static char *nfs4_path(const struct vfsmount *mnt_parent, - const struct dentry *dentry, - char *buffer, ssize_t buflen) +static char *nfs_path_component(const char *nfspath, const char *end) { - const char *srvpath; - - srvpath = strchr(mnt_parent->mnt_devname, ':'); - if (srvpath) - srvpath++; - else - srvpath = mnt_parent->mnt_devname; + char *p; + + if (*nfspath == '[') { + /* parse [] escaped IPv6 addrs */ + p = strchr(nfspath, ']'); + if (p != NULL && ++p < end && *p == ':') + return p + 1; + } else { + /* otherwise split on first colon */ + p = strchr(nfspath, ':'); + if (p != NULL && p < end) + return p + 1; + } + return NULL; +} - return nfs_path(srvpath, mnt_parent->mnt_root, dentry, buffer, buflen); +/* + * Determine the mount path as a string + */ +static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen) +{ + char *limit; + char *path = nfs_path(&limit, dentry, buffer, buflen, + NFS_PATH_CANONICAL); + if (!IS_ERR(path)) { + char *path_component = nfs_path_component(path, limit); + if (path_component) + return path_component; + } + return path; } /* * Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we * believe to be the server path to this dentry */ -static int nfs4_validate_fspath(const struct vfsmount *mnt_parent, - const struct dentry *dentry, +static int nfs4_validate_fspath(struct dentry *dentry, const struct nfs4_fs_locations *locations, char *page, char *page2) { const char *path, *fs_path; - path = nfs4_path(mnt_parent, dentry, page, PAGE_SIZE); + path = nfs4_path(dentry, page, PAGE_SIZE); if (IS_ERR(path)) return PTR_ERR(path); @@ -98,24 +121,125 @@ static int nfs4_validate_fspath(const struct vfsmount *mnt_parent, } static size_t nfs_parse_server_name(char *string, size_t len, - struct sockaddr *sa, size_t salen) + struct sockaddr *sa, size_t salen, struct net *net) { ssize_t ret; - ret = rpc_pton(string, len, sa, salen); + ret = rpc_pton(net, string, len, sa, salen); if (ret == 0) { - ret = nfs_dns_resolve_name(string, len, sa, salen); + ret = nfs_dns_resolve_name(net, string, len, sa, salen); if (ret < 0) ret = 0; } return ret; } +/** + * nfs_find_best_sec - Find a security mechanism supported locally + * @server: NFS server struct + * @flavors: List of security tuples returned by SECINFO procedure + * + * Return an rpc client that uses the first security mechanism in + * "flavors" that is locally supported. The "flavors" array + * is searched in the order returned from the server, per RFC 3530 + * recommendation and each flavor is checked for membership in the + * sec= mount option list if it exists. + * + * Return -EPERM if no matching flavor is found in the array. + * + * Please call rpc_shutdown_client() when you are done with this rpc client. + * + */ +static struct rpc_clnt *nfs_find_best_sec(struct rpc_clnt *clnt, + struct nfs_server *server, + struct nfs4_secinfo_flavors *flavors) +{ + rpc_authflavor_t pflavor; + struct nfs4_secinfo4 *secinfo; + unsigned int i; + + for (i = 0; i < flavors->num_flavors; i++) { + secinfo = &flavors->flavors[i]; + + switch (secinfo->flavor) { + case RPC_AUTH_NULL: + case RPC_AUTH_UNIX: + case RPC_AUTH_GSS: + pflavor = rpcauth_get_pseudoflavor(secinfo->flavor, + &secinfo->flavor_info); + /* does the pseudoflavor match a sec= mount opt? */ + if (pflavor != RPC_AUTH_MAXFLAVOR && + nfs_auth_info_match(&server->auth_info, pflavor)) { + struct rpc_clnt *new; + struct rpc_cred *cred; + + /* Cloning creates an rpc_auth for the flavor */ + new = rpc_clone_client_set_auth(clnt, pflavor); + if (IS_ERR(new)) + continue; + /** + * Check that the user actually can use the + * flavor. This is mostly for RPC_AUTH_GSS + * where cr_init obtains a gss context + */ + cred = rpcauth_lookupcred(new->cl_auth, 0); + if (IS_ERR(cred)) { + rpc_shutdown_client(new); + continue; + } + put_rpccred(cred); + return new; + } + } + } + return ERR_PTR(-EPERM); +} + +/** + * nfs4_negotiate_security - in response to an NFS4ERR_WRONGSEC on lookup, + * return an rpc_clnt that uses the best available security flavor with + * respect to the secinfo flavor list and the sec= mount options. + * + * @clnt: RPC client to clone + * @inode: directory inode + * @name: lookup name + * + * Please call rpc_shutdown_client() when you are done with this rpc client. + */ +struct rpc_clnt * +nfs4_negotiate_security(struct rpc_clnt *clnt, struct inode *inode, + struct qstr *name) +{ + struct page *page; + struct nfs4_secinfo_flavors *flavors; + struct rpc_clnt *new; + int err; + + page = alloc_page(GFP_KERNEL); + if (!page) + return ERR_PTR(-ENOMEM); + + flavors = page_address(page); + + err = nfs4_proc_secinfo(inode, name, flavors); + if (err < 0) { + new = ERR_PTR(err); + goto out; + } + + new = nfs_find_best_sec(clnt, NFS_SERVER(inode), flavors); + +out: + put_page(page); + return new; +} + static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, char *page, char *page2, const struct nfs4_fs_location *location) { const size_t addr_bufsize = sizeof(struct sockaddr_storage); + struct net *net = rpc_net_ns(NFS_SB(mountdata->sb)->client); struct vfsmount *mnt = ERR_PTR(-ENOENT); char *mnt_path; unsigned int maxbuflen; @@ -141,7 +265,7 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, continue; mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len, - mountdata->addr, addr_bufsize); + mountdata->addr, addr_bufsize, net); if (mountdata->addrlen == 0) continue; @@ -165,20 +289,18 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata, /** * nfs_follow_referral - set up mountpoint when hitting a referral on moved error - * @mnt_parent - mountpoint of parent directory * @dentry - parent directory * @locations - array of NFSv4 server location information * */ -static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent, - const struct dentry *dentry, +static struct vfsmount *nfs_follow_referral(struct dentry *dentry, const struct nfs4_fs_locations *locations) { struct vfsmount *mnt = ERR_PTR(-ENOENT); struct nfs_clone_mount mountdata = { - .sb = mnt_parent->mnt_sb, + .sb = dentry->d_sb, .dentry = dentry, - .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor, + .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor, }; char *page = NULL, *page2 = NULL; int loc, error; @@ -186,8 +308,7 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent, if (locations == NULL || locations->nlocations <= 0) goto out; - dprintk("%s: referral at %s/%s\n", __func__, - dentry->d_parent->d_name.name, dentry->d_name.name); + dprintk("%s: referral at %pd2\n", __func__, dentry); page = (char *) __get_free_page(GFP_USER); if (!page) @@ -198,7 +319,7 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent, goto out; /* Ensure fs path is a prefix of current dentry path */ - error = nfs4_validate_fspath(mnt_parent, dentry, locations, page, page2); + error = nfs4_validate_fspath(dentry, locations, page, page2); if (error < 0) { mnt = ERR_PTR(error); goto out; @@ -225,11 +346,10 @@ out: /* * nfs_do_refmount - handle crossing a referral on server - * @mnt_parent - mountpoint of referral * @dentry - dentry of referral * */ -struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry) +static struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry) { struct vfsmount *mnt = ERR_PTR(-ENOMEM); struct dentry *parent; @@ -252,17 +372,17 @@ struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentr mnt = ERR_PTR(-ENOENT); parent = dget_parent(dentry); - dprintk("%s: getting locations for %s/%s\n", - __func__, parent->d_name.name, dentry->d_name.name); + dprintk("%s: getting locations for %pd2\n", + __func__, dentry); - err = nfs4_proc_fs_locations(parent->d_inode, &dentry->d_name, fs_locations, page); + err = nfs4_proc_fs_locations(client, parent->d_inode, &dentry->d_name, fs_locations, page); dput(parent); if (err != 0 || fs_locations->nlocations <= 0 || fs_locations->fs_path.ncomponents <= 0) goto out_free; - mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations); + mnt = nfs_follow_referral(dentry, fs_locations); out_free: __free_page(page); kfree(fs_locations); @@ -270,3 +390,134 @@ out: dprintk("%s: done\n", __func__); return mnt; } + +struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry, + struct nfs_fh *fh, struct nfs_fattr *fattr) +{ + rpc_authflavor_t flavor = server->client->cl_auth->au_flavor; + struct dentry *parent = dget_parent(dentry); + struct inode *dir = parent->d_inode; + struct qstr *name = &dentry->d_name; + struct rpc_clnt *client; + struct vfsmount *mnt; + + /* Look it up again to get its attributes and sec flavor */ + client = nfs4_proc_lookup_mountpoint(dir, name, fh, fattr); + dput(parent); + if (IS_ERR(client)) + return ERR_CAST(client); + + if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { + mnt = nfs_do_refmount(client, dentry); + goto out; + } + + if (client->cl_auth->au_flavor != flavor) + flavor = client->cl_auth->au_flavor; + mnt = nfs_do_submount(dentry, fh, fattr, flavor); +out: + rpc_shutdown_client(client); + return mnt; +} + +/* + * Try one location from the fs_locations array. + * + * Returns zero on success, or a negative errno value. + */ +static int nfs4_try_replacing_one_location(struct nfs_server *server, + char *page, char *page2, + const struct nfs4_fs_location *location) +{ + const size_t addr_bufsize = sizeof(struct sockaddr_storage); + struct net *net = rpc_net_ns(server->client); + struct sockaddr *sap; + unsigned int s; + size_t salen; + int error; + + sap = kmalloc(addr_bufsize, GFP_KERNEL); + if (sap == NULL) + return -ENOMEM; + + error = -ENOENT; + for (s = 0; s < location->nservers; s++) { + const struct nfs4_string *buf = &location->servers[s]; + char *hostname; + + if (buf->len <= 0 || buf->len > PAGE_SIZE) + continue; + + if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len) != NULL) + continue; + + salen = nfs_parse_server_name(buf->data, buf->len, + sap, addr_bufsize, net); + if (salen == 0) + continue; + rpc_set_port(sap, NFS_PORT); + + error = -ENOMEM; + hostname = kstrndup(buf->data, buf->len, GFP_KERNEL); + if (hostname == NULL) + break; + + error = nfs4_update_server(server, hostname, sap, salen, net); + kfree(hostname); + if (error == 0) + break; + } + + kfree(sap); + return error; +} + +/** + * nfs4_replace_transport - set up transport to destination server + * + * @server: export being migrated + * @locations: fs_locations array + * + * Returns zero on success, or a negative errno value. + * + * The client tries all the entries in the "locations" array, in the + * order returned by the server, until one works or the end of the + * array is reached. + */ +int nfs4_replace_transport(struct nfs_server *server, + const struct nfs4_fs_locations *locations) +{ + char *page = NULL, *page2 = NULL; + int loc, error; + + error = -ENOENT; + if (locations == NULL || locations->nlocations <= 0) + goto out; + + error = -ENOMEM; + page = (char *) __get_free_page(GFP_USER); + if (!page) + goto out; + page2 = (char *) __get_free_page(GFP_USER); + if (!page2) + goto out; + + for (loc = 0; loc < locations->nlocations; loc++) { + const struct nfs4_fs_location *location = + &locations->locations[loc]; + + if (location == NULL || location->nservers <= 0 || + location->rootpath.ncomponents == 0) + continue; + + error = nfs4_try_replacing_one_location(server, page, + page2, location); + if (error == 0) + break; + } + +out: + free_page((unsigned long)page); + free_page((unsigned long)page2); + return error; +} diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 0f24cdf2cb1..4bf3d97cc5a 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -39,16 +39,22 @@ #include <linux/delay.h> #include <linux/errno.h> #include <linux/string.h> +#include <linux/ratelimit.h> +#include <linux/printk.h> #include <linux/slab.h> #include <linux/sunrpc/clnt.h> #include <linux/nfs.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> #include <linux/nfs_page.h> +#include <linux/nfs_mount.h> #include <linux/namei.h> #include <linux/mount.h> #include <linux/module.h> -#include <linux/sunrpc/bc_xprt.h> +#include <linux/nfs_idmap.h> +#include <linux/xattr.h> +#include <linux/utsname.h> +#include <linux/freezer.h> #include "nfs4_fs.h" #include "delegation.h" @@ -56,24 +62,81 @@ #include "iostat.h" #include "callback.h" #include "pnfs.h" +#include "netns.h" +#include "nfs4session.h" +#include "fscache.h" + +#include "nfs4trace.h" #define NFSDBG_FACILITY NFSDBG_PROC #define NFS4_POLL_RETRY_MIN (HZ/10) #define NFS4_POLL_RETRY_MAX (15*HZ) -#define NFS4_MAX_LOOP_ON_RECOVER (10) - struct nfs4_opendata; static int _nfs4_proc_open(struct nfs4_opendata *data); static int _nfs4_recover_proc_open(struct nfs4_opendata *data); static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); -static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); -static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); +static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); +static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); +static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, - struct nfs4_state *state); + struct nfs4_state *state, struct nfs4_label *ilabel, + struct nfs4_label *olabel); +#ifdef CONFIG_NFS_V4_1 +static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, + struct rpc_cred *); +static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, + struct rpc_cred *); +#endif + +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static inline struct nfs4_label * +nfs4_label_init_security(struct inode *dir, struct dentry *dentry, + struct iattr *sattr, struct nfs4_label *label) +{ + int err; + + if (label == NULL) + return NULL; + + if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) + return NULL; + + err = security_dentry_init_security(dentry, sattr->ia_mode, + &dentry->d_name, (void **)&label->label, &label->len); + if (err == 0) + return label; + + return NULL; +} +static inline void +nfs4_label_release_security(struct nfs4_label *label) +{ + if (label) + security_release_secctx(label->label, label->len); +} +static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) +{ + if (label) + return server->attr_bitmask; + + return server->attr_bitmask_nl; +} +#else +static inline struct nfs4_label * +nfs4_label_init_security(struct inode *dir, struct dentry *dentry, + struct iattr *sattr, struct nfs4_label *l) +{ return NULL; } +static inline void +nfs4_label_release_security(struct nfs4_label *label) +{ return; } +static inline u32 * +nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) +{ return server->attr_bitmask; } +#endif /* Prevent leaks of NFSv4 errors into userland */ static int nfs4_map_errors(int err) @@ -82,7 +145,23 @@ static int nfs4_map_errors(int err) return err; switch (err) { case -NFS4ERR_RESOURCE: + case -NFS4ERR_LAYOUTTRYLATER: + case -NFS4ERR_RECALLCONFLICT: return -EREMOTEIO; + case -NFS4ERR_WRONGSEC: + case -NFS4ERR_WRONG_CRED: + return -EPERM; + case -NFS4ERR_BADOWNER: + case -NFS4ERR_BADNAME: + return -EINVAL; + case -NFS4ERR_SHARE_DENIED: + return -EACCES; + case -NFS4ERR_MINOR_VERS_MISMATCH: + return -EPROTONOSUPPORT; + case -NFS4ERR_ACCESS: + return -EACCES; + case -NFS4ERR_FILE_OPEN: + return -EBUSY; default: dprintk("%s could not handle NFSv4 error %d\n", __func__, -err); @@ -94,7 +173,7 @@ static int nfs4_map_errors(int err) /* * This is our standard bitmap for GETATTR requests. */ -const u32 nfs4_fattr_bitmap[2] = { +const u32 nfs4_fattr_bitmap[3] = { FATTR4_WORD0_TYPE | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE @@ -108,10 +187,37 @@ const u32 nfs4_fattr_bitmap[2] = { | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_METADATA - | FATTR4_WORD1_TIME_MODIFY + | FATTR4_WORD1_TIME_MODIFY, +#ifdef CONFIG_NFS_V4_SECURITY_LABEL + FATTR4_WORD2_SECURITY_LABEL +#endif }; -const u32 nfs4_statfs_bitmap[2] = { +static const u32 nfs4_pnfs_open_bitmap[3] = { + FATTR4_WORD0_TYPE + | FATTR4_WORD0_CHANGE + | FATTR4_WORD0_SIZE + | FATTR4_WORD0_FSID + | FATTR4_WORD0_FILEID, + FATTR4_WORD1_MODE + | FATTR4_WORD1_NUMLINKS + | FATTR4_WORD1_OWNER + | FATTR4_WORD1_OWNER_GROUP + | FATTR4_WORD1_RAWDEV + | FATTR4_WORD1_SPACE_USED + | FATTR4_WORD1_TIME_ACCESS + | FATTR4_WORD1_TIME_METADATA + | FATTR4_WORD1_TIME_MODIFY, + FATTR4_WORD2_MDSTHRESHOLD +}; + +static const u32 nfs4_open_noattr_bitmap[3] = { + FATTR4_WORD0_TYPE + | FATTR4_WORD0_CHANGE + | FATTR4_WORD0_FILEID, +}; + +const u32 nfs4_statfs_bitmap[3] = { FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL, @@ -120,21 +226,22 @@ const u32 nfs4_statfs_bitmap[2] = { | FATTR4_WORD1_SPACE_TOTAL }; -const u32 nfs4_pathconf_bitmap[2] = { +const u32 nfs4_pathconf_bitmap[3] = { FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME, 0 }; -const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE +const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_LEASE_TIME, FATTR4_WORD1_TIME_DELTA - | FATTR4_WORD1_FS_LAYOUT_TYPES + | FATTR4_WORD1_FS_LAYOUT_TYPES, + FATTR4_WORD2_LAYOUT_BLKSIZE }; -const u32 nfs4_fs_locations_bitmap[2] = { +const u32 nfs4_fs_locations_bitmap[3] = { FATTR4_WORD0_TYPE | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE @@ -150,7 +257,7 @@ const u32 nfs4_fs_locations_bitmap[2] = { | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY - | FATTR4_WORD1_MOUNTED_ON_FILEID + | FATTR4_WORD1_MOUNTED_ON_FILEID, }; static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, @@ -158,7 +265,6 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent { __be32 *start, *p; - BUG_ON(readdir->count < 80); if (cookie > 2) { readdir->cookie = cookie; memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); @@ -177,7 +283,7 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent * when talking to the server, we always send cookie 0 * instead of 1 or 2. */ - start = p = kmap_atomic(*readdir->pages, KM_USER0); + start = p = kmap_atomic(*readdir->pages); if (cookie == 0) { *p++ = xdr_one; /* next */ @@ -205,18 +311,7 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent readdir->pgbase = (char *)p - (char *)start; readdir->count -= readdir->pgbase; - kunmap_atomic(start, KM_USER0); -} - -static int nfs4_wait_clnt_recover(struct nfs_client *clp) -{ - int res; - - might_sleep(); - - res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, - nfs_wait_bit_killable, TASK_KILLABLE); - return res; + kunmap_atomic(start); } static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) @@ -229,7 +324,7 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) *timeout = NFS4_POLL_RETRY_MIN; if (*timeout > NFS4_POLL_RETRY_MAX) *timeout = NFS4_POLL_RETRY_MAX; - schedule_timeout_killable(*timeout); + freezable_schedule_timeout_killable_unsafe(*timeout); if (fatal_signal_pending(current)) res = -ERESTARTSYS; *timeout <<= 1; @@ -239,27 +334,61 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) /* This is the error handling routine for processes that are allowed * to sleep. */ -static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) +static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) { struct nfs_client *clp = server->nfs_client; struct nfs4_state *state = exception->state; + struct inode *inode = exception->inode; int ret = errorcode; exception->retry = 0; switch(errorcode) { case 0: return 0; + case -NFS4ERR_OPENMODE: + if (inode && nfs4_have_delegation(inode, FMODE_READ)) { + nfs4_inode_return_delegation(inode); + exception->retry = 1; + return 0; + } + if (state == NULL) + break; + ret = nfs4_schedule_stateid_recovery(server, state); + if (ret < 0) + break; + goto wait_on_recovery; + case -NFS4ERR_DELEG_REVOKED: case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_BAD_STATEID: - case -NFS4ERR_OPENMODE: + if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) { + nfs_remove_bad_delegation(inode); + exception->retry = 1; + break; + } if (state == NULL) break; - nfs4_state_mark_reclaim_nograce(clp, state); - goto do_state_recovery; + ret = nfs4_schedule_stateid_recovery(server, state); + if (ret < 0) + break; + goto wait_on_recovery; + case -NFS4ERR_EXPIRED: + if (state != NULL) { + ret = nfs4_schedule_stateid_recovery(server, state); + if (ret < 0) + break; + } case -NFS4ERR_STALE_STATEID: case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_EXPIRED: - goto do_state_recovery; + nfs4_schedule_lease_recovery(clp); + goto wait_on_recovery; + case -NFS4ERR_MOVED: + ret = nfs4_schedule_migration_recovery(server); + if (ret < 0) + break; + goto wait_on_recovery; + case -NFS4ERR_LEASE_MOVED: + nfs4_schedule_lease_moved_recovery(clp); + goto wait_on_recovery; #if defined(CONFIG_NFS_V4_1) case -NFS4ERR_BADSESSION: case -NFS4ERR_BADSLOT: @@ -270,9 +399,8 @@ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, case -NFS4ERR_SEQ_MISORDERED: dprintk("%s ERROR: %d Reset session\n", __func__, errorcode); - nfs4_schedule_state_recovery(clp); - exception->retry = 1; - break; + nfs4_schedule_session_recovery(clp->cl_session, errorcode); + goto wait_on_recovery; #endif /* defined(CONFIG_NFS_V4_1) */ case -NFS4ERR_FILE_OPEN: if (exception->timeout > HZ) { @@ -284,23 +412,51 @@ static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, } case -NFS4ERR_GRACE: case -NFS4ERR_DELAY: - case -EKEYEXPIRED: ret = nfs4_delay(server->client, &exception->timeout); if (ret != 0) break; + case -NFS4ERR_RETRY_UNCACHED_REP: case -NFS4ERR_OLD_STATEID: exception->retry = 1; + break; + case -NFS4ERR_BADOWNER: + /* The following works around a Linux server bug! */ + case -NFS4ERR_BADNAME: + if (server->caps & NFS_CAP_UIDGID_NOMAP) { + server->caps &= ~NFS_CAP_UIDGID_NOMAP; + exception->retry = 1; + printk(KERN_WARNING "NFS: v4 server %s " + "does not accept raw " + "uid/gids. " + "Reenabling the idmapper.\n", + server->nfs_client->cl_hostname); + } } /* We failed to handle the error */ return nfs4_map_errors(ret); -do_state_recovery: - nfs4_schedule_state_recovery(clp); +wait_on_recovery: ret = nfs4_wait_clnt_recover(clp); + if (test_bit(NFS_MIG_FAILED, &server->mig_status)) + return -EIO; if (ret == 0) exception->retry = 1; return ret; } +/* + * Return 'true' if 'clp' is using an rpc_client that is integrity protected + * or 'false' otherwise. + */ +static bool _nfs4_is_integrity_protected(struct nfs_client *clp) +{ + rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; + + if (flavor == RPC_AUTH_GSS_KRB5I || + flavor == RPC_AUTH_GSS_KRB5P) + return true; + + return false; +} static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) { @@ -315,342 +471,400 @@ static void renew_lease(const struct nfs_server *server, unsigned long timestamp do_renew_lease(server->nfs_client, timestamp); } -#if defined(CONFIG_NFS_V4_1) +struct nfs4_call_sync_data { + const struct nfs_server *seq_server; + struct nfs4_sequence_args *seq_args; + struct nfs4_sequence_res *seq_res; +}; -/* - * nfs4_free_slot - free a slot and efficiently update slot table. - * - * freeing a slot is trivially done by clearing its respective bit - * in the bitmap. - * If the freed slotid equals highest_used_slotid we want to update it - * so that the server would be able to size down the slot table if needed, - * otherwise we know that the highest_used_slotid is still in use. - * When updating highest_used_slotid there may be "holes" in the bitmap - * so we need to scan down from highest_used_slotid to 0 looking for the now - * highest slotid in use. - * If none found, highest_used_slotid is set to -1. - * - * Must be called while holding tbl->slot_tbl_lock - */ -static void -nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot) +static void nfs4_init_sequence(struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, int cache_reply) { - int free_slotid = free_slot - tbl->slots; - int slotid = free_slotid; + args->sa_slot = NULL; + args->sa_cache_this = cache_reply; + args->sa_privileged = 0; - BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE); - /* clear used bit in bitmap */ - __clear_bit(slotid, tbl->used_slots); + res->sr_slot = NULL; +} - /* update highest_used_slotid when it is freed */ - if (slotid == tbl->highest_used_slotid) { - slotid = find_last_bit(tbl->used_slots, tbl->max_slots); - if (slotid < tbl->max_slots) - tbl->highest_used_slotid = slotid; - else - tbl->highest_used_slotid = -1; - } - dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, - free_slotid, tbl->highest_used_slotid); +static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) +{ + args->sa_privileged = 1; } -/* - * Signal state manager thread if session is drained - */ -static void nfs41_check_drain_session_complete(struct nfs4_session *ses) +static int nfs40_setup_sequence(const struct nfs_server *server, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, + struct rpc_task *task) { - struct rpc_task *task; + struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl; + struct nfs4_slot *slot; - if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { - task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); - if (task) - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - return; + /* slot already allocated? */ + if (res->sr_slot != NULL) + goto out_start; + + spin_lock(&tbl->slot_tbl_lock); + if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) + goto out_sleep; + + slot = nfs4_alloc_slot(tbl); + if (IS_ERR(slot)) { + if (slot == ERR_PTR(-ENOMEM)) + task->tk_timeout = HZ >> 2; + goto out_sleep; } + spin_unlock(&tbl->slot_tbl_lock); - if (ses->fc_slot_table.highest_used_slotid != -1) - return; + args->sa_slot = slot; + res->sr_slot = slot; - dprintk("%s COMPLETE: Session Drained\n", __func__); - complete(&ses->complete); +out_start: + rpc_call_start(task); + return 0; + +out_sleep: + if (args->sa_privileged) + rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, + NULL, RPC_PRIORITY_PRIVILEGED); + else + rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); + spin_unlock(&tbl->slot_tbl_lock); + return -EAGAIN; } -static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) +static int nfs40_sequence_done(struct rpc_task *task, + struct nfs4_sequence_res *res) { + struct nfs4_slot *slot = res->sr_slot; struct nfs4_slot_table *tbl; - tbl = &res->sr_session->fc_slot_table; - if (!res->sr_slot) { - /* just wake up the next guy waiting since - * we may have not consumed a slot after all */ - dprintk("%s: No slot\n", __func__); - return; - } + if (slot == NULL) + goto out; + tbl = slot->table; spin_lock(&tbl->slot_tbl_lock); - nfs4_free_slot(tbl, res->sr_slot); - nfs41_check_drain_session_complete(res->sr_session); + if (!nfs41_wake_and_assign_slot(tbl, slot)) + nfs4_free_slot(tbl, slot); spin_unlock(&tbl->slot_tbl_lock); + res->sr_slot = NULL; +out: + return 1; } -static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) +#if defined(CONFIG_NFS_V4_1) + +static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) { - unsigned long timestamp; - struct nfs_client *clp; + struct nfs4_session *session; + struct nfs4_slot_table *tbl; + struct nfs4_slot *slot = res->sr_slot; + bool send_new_highest_used_slotid = false; - /* - * sr_status remains 1 if an RPC level error occurred. The server - * may or may not have processed the sequence operation.. - * Proceed as if the server received and processed the sequence - * operation. + tbl = slot->table; + session = tbl->session; + + spin_lock(&tbl->slot_tbl_lock); + /* Be nice to the server: try to ensure that the last transmitted + * value for highest_user_slotid <= target_highest_slotid */ - if (res->sr_status == 1) - res->sr_status = NFS_OK; + if (tbl->highest_used_slotid > tbl->target_highest_slotid) + send_new_highest_used_slotid = true; + + if (nfs41_wake_and_assign_slot(tbl, slot)) { + send_new_highest_used_slotid = false; + goto out_unlock; + } + nfs4_free_slot(tbl, slot); + + if (tbl->highest_used_slotid != NFS4_NO_SLOT) + send_new_highest_used_slotid = false; +out_unlock: + spin_unlock(&tbl->slot_tbl_lock); + res->sr_slot = NULL; + if (send_new_highest_used_slotid) + nfs41_server_notify_highest_slotid_update(session->clp); +} - /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ - if (!res->sr_slot) +int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) +{ + struct nfs4_session *session; + struct nfs4_slot *slot = res->sr_slot; + struct nfs_client *clp; + bool interrupted = false; + int ret = 1; + + if (slot == NULL) + goto out_noaction; + /* don't increment the sequence number if the task wasn't sent */ + if (!RPC_WAS_SENT(task)) goto out; + session = slot->table->session; + + if (slot->interrupted) { + slot->interrupted = 0; + interrupted = true; + } + + trace_nfs4_sequence_done(session, res); /* Check the SEQUENCE operation status */ switch (res->sr_status) { case 0: /* Update the slot's sequence and clientid lease timer */ - ++res->sr_slot->seq_nr; - timestamp = res->sr_renewal_time; - clp = res->sr_session->clp; - do_renew_lease(clp, timestamp); + ++slot->seq_nr; + clp = session->clp; + do_renew_lease(clp, res->sr_timestamp); /* Check sequence flags */ - if (atomic_read(&clp->cl_count) > 1) - nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); + if (res->sr_status_flags != 0) + nfs4_schedule_lease_recovery(clp); + nfs41_update_target_slotid(slot->table, slot, res); break; + case 1: + /* + * sr_status remains 1 if an RPC level error occurred. + * The server may or may not have processed the sequence + * operation.. + * Mark the slot as having hosted an interrupted RPC call. + */ + slot->interrupted = 1; + goto out; case -NFS4ERR_DELAY: /* The server detected a resend of the RPC call and * returned NFS4ERR_DELAY as per Section 2.10.6.2 * of RFC5661. */ - dprintk("%s: slot=%td seq=%d: Operation in progress\n", + dprintk("%s: slot=%u seq=%u: Operation in progress\n", __func__, - res->sr_slot - res->sr_session->fc_slot_table.slots, - res->sr_slot->seq_nr); + slot->slot_nr, + slot->seq_nr); goto out_retry; + case -NFS4ERR_BADSLOT: + /* + * The slot id we used was probably retired. Try again + * using a different slot id. + */ + goto retry_nowait; + case -NFS4ERR_SEQ_MISORDERED: + /* + * Was the last operation on this sequence interrupted? + * If so, retry after bumping the sequence number. + */ + if (interrupted) { + ++slot->seq_nr; + goto retry_nowait; + } + /* + * Could this slot have been previously retired? + * If so, then the server may be expecting seq_nr = 1! + */ + if (slot->seq_nr != 1) { + slot->seq_nr = 1; + goto retry_nowait; + } + break; + case -NFS4ERR_SEQ_FALSE_RETRY: + ++slot->seq_nr; + goto retry_nowait; default: /* Just update the slot sequence no. */ - ++res->sr_slot->seq_nr; + ++slot->seq_nr; } out: /* The session may be reset by one of the error handlers. */ dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); nfs41_sequence_free_slot(res); - return 1; +out_noaction: + return ret; +retry_nowait: + if (rpc_restart_call_prepare(task)) { + task->tk_status = 0; + ret = 0; + } + goto out; out_retry: if (!rpc_restart_call(task)) goto out; rpc_delay(task, NFS4_POLL_RETRY_MAX); return 0; } +EXPORT_SYMBOL_GPL(nfs41_sequence_done); static int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) { - if (res->sr_session == NULL) + if (res->sr_slot == NULL) return 1; + if (!res->sr_slot->table->session) + return nfs40_sequence_done(task, res); return nfs41_sequence_done(task, res); } -/* - * nfs4_find_slot - efficiently look for a free slot - * - * nfs4_find_slot looks for an unset bit in the used_slots bitmap. - * If found, we mark the slot as used, update the highest_used_slotid, - * and respectively set up the sequence operation args. - * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. - * - * Note: must be called with under the slot_tbl_lock. - */ -static u8 -nfs4_find_slot(struct nfs4_slot_table *tbl) -{ - int slotid; - u8 ret_id = NFS4_MAX_SLOT_TABLE; - BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); - - dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", - __func__, tbl->used_slots[0], tbl->highest_used_slotid, - tbl->max_slots); - slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); - if (slotid >= tbl->max_slots) - goto out; - __set_bit(slotid, tbl->used_slots); - if (slotid > tbl->highest_used_slotid) - tbl->highest_used_slotid = slotid; - ret_id = slotid; -out: - dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", - __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); - return ret_id; -} - -static int nfs41_setup_sequence(struct nfs4_session *session, +int nfs41_setup_sequence(struct nfs4_session *session, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, - int cache_reply, struct rpc_task *task) { struct nfs4_slot *slot; struct nfs4_slot_table *tbl; - u8 slotid; dprintk("--> %s\n", __func__); /* slot already allocated? */ if (res->sr_slot != NULL) - return 0; + goto out_success; tbl = &session->fc_slot_table; - spin_lock(&tbl->slot_tbl_lock); - if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && - !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { - /* - * The state manager will wait until the slot table is empty. - * Schedule the reset thread - */ - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); - dprintk("%s Schedule Session Reset\n", __func__); - return -EAGAIN; - } + task->tk_timeout = 0; - if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && - !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); - dprintk("%s enforce FIFO order\n", __func__); - return -EAGAIN; + spin_lock(&tbl->slot_tbl_lock); + if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && + !args->sa_privileged) { + /* The state manager will wait until the slot table is empty */ + dprintk("%s session is draining\n", __func__); + goto out_sleep; } - slotid = nfs4_find_slot(tbl); - if (slotid == NFS4_MAX_SLOT_TABLE) { - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); + slot = nfs4_alloc_slot(tbl); + if (IS_ERR(slot)) { + /* If out of memory, try again in 1/4 second */ + if (slot == ERR_PTR(-ENOMEM)) + task->tk_timeout = HZ >> 2; dprintk("<-- %s: no free slots\n", __func__); - return -EAGAIN; + goto out_sleep; } spin_unlock(&tbl->slot_tbl_lock); - rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); - slot = tbl->slots + slotid; - args->sa_session = session; - args->sa_slotid = slotid; - args->sa_cache_this = cache_reply; + args->sa_slot = slot; - dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); + dprintk("<-- %s slotid=%u seqid=%u\n", __func__, + slot->slot_nr, slot->seq_nr); - res->sr_session = session; res->sr_slot = slot; - res->sr_renewal_time = jiffies; + res->sr_timestamp = jiffies; res->sr_status_flags = 0; /* * sr_status is only set in decode_sequence, and so will remain * set to 1 if an rpc level failure occurs. */ res->sr_status = 1; + trace_nfs4_setup_sequence(session, args); +out_success: + rpc_call_start(task); return 0; +out_sleep: + /* Privileged tasks are queued with top priority */ + if (args->sa_privileged) + rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, + NULL, RPC_PRIORITY_PRIVILEGED); + else + rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); + spin_unlock(&tbl->slot_tbl_lock); + return -EAGAIN; } +EXPORT_SYMBOL_GPL(nfs41_setup_sequence); -int nfs4_setup_sequence(const struct nfs_server *server, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply, - struct rpc_task *task) +static int nfs4_setup_sequence(const struct nfs_server *server, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, + struct rpc_task *task) { struct nfs4_session *session = nfs4_get_session(server); int ret = 0; - if (session == NULL) { - args->sa_session = NULL; - res->sr_session = NULL; - goto out; - } + if (!session) + return nfs40_setup_sequence(server, args, res, task); - dprintk("--> %s clp %p session %p sr_slot %td\n", + dprintk("--> %s clp %p session %p sr_slot %u\n", __func__, session->clp, session, res->sr_slot ? - res->sr_slot - session->fc_slot_table.slots : -1); + res->sr_slot->slot_nr : NFS4_NO_SLOT); + + ret = nfs41_setup_sequence(session, args, res, task); - ret = nfs41_setup_sequence(session, args, res, cache_reply, - task); -out: dprintk("<-- %s status=%d\n", __func__, ret); return ret; } -struct nfs41_call_sync_data { - const struct nfs_server *seq_server; - struct nfs4_sequence_args *seq_args; - struct nfs4_sequence_res *seq_res; - int cache_reply; -}; - static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) { - struct nfs41_call_sync_data *data = calldata; + struct nfs4_call_sync_data *data = calldata; + struct nfs4_session *session = nfs4_get_session(data->seq_server); dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); - if (nfs4_setup_sequence(data->seq_server, data->seq_args, - data->seq_res, data->cache_reply, task)) - return; - rpc_call_start(task); -} - -static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs41_call_sync_prepare(task, calldata); + nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); } static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) { - struct nfs41_call_sync_data *data = calldata; + struct nfs4_call_sync_data *data = calldata; nfs41_sequence_done(task, data->seq_res); } -struct rpc_call_ops nfs41_call_sync_ops = { +static const struct rpc_call_ops nfs41_call_sync_ops = { .rpc_call_prepare = nfs41_call_sync_prepare, .rpc_call_done = nfs41_call_sync_done, }; -struct rpc_call_ops nfs41_call_priv_sync_ops = { - .rpc_call_prepare = nfs41_call_priv_sync_prepare, - .rpc_call_done = nfs41_call_sync_done, +#else /* !CONFIG_NFS_V4_1 */ + +static int nfs4_setup_sequence(const struct nfs_server *server, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, + struct rpc_task *task) +{ + return nfs40_setup_sequence(server, args, res, task); +} + +static int nfs4_sequence_done(struct rpc_task *task, + struct nfs4_sequence_res *res) +{ + return nfs40_sequence_done(task, res); +} + +#endif /* !CONFIG_NFS_V4_1 */ + +static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs4_call_sync_data *data = calldata; + nfs4_setup_sequence(data->seq_server, + data->seq_args, data->seq_res, task); +} + +static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) +{ + struct nfs4_call_sync_data *data = calldata; + nfs4_sequence_done(task, data->seq_res); +} + +static const struct rpc_call_ops nfs40_call_sync_ops = { + .rpc_call_prepare = nfs40_call_sync_prepare, + .rpc_call_done = nfs40_call_sync_done, }; -static int nfs4_call_sync_sequence(struct nfs_server *server, +static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, + struct nfs_server *server, struct rpc_message *msg, struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply, - int privileged) + struct nfs4_sequence_res *res) { int ret; struct rpc_task *task; - struct nfs41_call_sync_data data = { + struct nfs_client *clp = server->nfs_client; + struct nfs4_call_sync_data data = { .seq_server = server, .seq_args = args, .seq_res = res, - .cache_reply = cache_reply, }; struct rpc_task_setup task_setup = { - .rpc_client = server->client, + .rpc_client = clnt, .rpc_message = msg, - .callback_ops = &nfs41_call_sync_ops, + .callback_ops = clp->cl_mvops->call_sync_ops, .callback_data = &data }; - res->sr_slot = NULL; - if (privileged) - task_setup.callback_ops = &nfs41_call_priv_sync_ops; task = rpc_run_task(&task_setup); if (IS_ERR(task)) ret = PTR_ERR(task); @@ -661,46 +875,28 @@ static int nfs4_call_sync_sequence(struct nfs_server *server, return ret; } -int _nfs4_call_sync_session(struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply) +static +int nfs4_call_sync(struct rpc_clnt *clnt, + struct nfs_server *server, + struct rpc_message *msg, + struct nfs4_sequence_args *args, + struct nfs4_sequence_res *res, + int cache_reply) { - return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0); + nfs4_init_sequence(args, res, cache_reply); + return nfs4_call_sync_sequence(clnt, server, msg, args, res); } -#else -static int nfs4_sequence_done(struct rpc_task *task, - struct nfs4_sequence_res *res) -{ - return 1; -} -#endif /* CONFIG_NFS_V4_1 */ - -int _nfs4_call_sync(struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply) -{ - args->sa_session = res->sr_session = NULL; - return rpc_call_sync(server->client, msg, 0); -} - -#define nfs4_call_sync(server, msg, args, res, cache_reply) \ - (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \ - &(res)->seq_res, (cache_reply)) - static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) { struct nfs_inode *nfsi = NFS_I(dir); spin_lock(&dir->i_lock); - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; - if (!cinfo->atomic || cinfo->before != nfsi->change_attr) + nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; + if (!cinfo->atomic || cinfo->before != dir->i_version) nfs_force_lookup_revalidate(dir); - nfsi->change_attr = cinfo->after; + dir->i_version = cinfo->after; + nfs_fscache_invalidate(dir); spin_unlock(&dir->i_lock); } @@ -710,37 +906,73 @@ struct nfs4_opendata { struct nfs_openres o_res; struct nfs_open_confirmargs c_arg; struct nfs_open_confirmres c_res; + struct nfs4_string owner_name; + struct nfs4_string group_name; struct nfs_fattr f_attr; - struct nfs_fattr dir_attr; - struct path path; + struct nfs4_label *f_label; struct dentry *dir; + struct dentry *dentry; struct nfs4_state_owner *owner; struct nfs4_state *state; struct iattr attrs; unsigned long timestamp; unsigned int rpc_done : 1; + unsigned int file_created : 1; + unsigned int is_recover : 1; int rpc_status; int cancelled; }; +static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, + int err, struct nfs4_exception *exception) +{ + if (err != -EINVAL) + return false; + if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) + return false; + server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; + exception->retry = 1; + return true; +} + +static enum open_claim_type4 +nfs4_map_atomic_open_claim(struct nfs_server *server, + enum open_claim_type4 claim) +{ + if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) + return claim; + switch (claim) { + default: + return claim; + case NFS4_OPEN_CLAIM_FH: + return NFS4_OPEN_CLAIM_NULL; + case NFS4_OPEN_CLAIM_DELEG_CUR_FH: + return NFS4_OPEN_CLAIM_DELEGATE_CUR; + case NFS4_OPEN_CLAIM_DELEG_PREV_FH: + return NFS4_OPEN_CLAIM_DELEGATE_PREV; + } +} static void nfs4_init_opendata_res(struct nfs4_opendata *p) { p->o_res.f_attr = &p->f_attr; - p->o_res.dir_attr = &p->dir_attr; + p->o_res.f_label = p->f_label; p->o_res.seqid = p->o_arg.seqid; p->c_res.seqid = p->c_arg.seqid; p->o_res.server = p->o_arg.server; + p->o_res.access_request = p->o_arg.access; nfs_fattr_init(&p->f_attr); - nfs_fattr_init(&p->dir_attr); + nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); } -static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, +static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, struct nfs4_state_owner *sp, fmode_t fmode, int flags, const struct iattr *attrs, + struct nfs4_label *label, + enum open_claim_type4 claim, gfp_t gfp_mask) { - struct dentry *parent = dget_parent(path->dentry); + struct dentry *parent = dget_parent(dentry); struct inode *dir = parent->d_inode; struct nfs_server *server = NFS_SERVER(dir); struct nfs4_opendata *p; @@ -748,31 +980,60 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, p = kzalloc(sizeof(*p), gfp_mask); if (p == NULL) goto err; + + p->f_label = nfs4_label_alloc(server, gfp_mask); + if (IS_ERR(p->f_label)) + goto err_free_p; + p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); if (p->o_arg.seqid == NULL) - goto err_free; - path_get(path); - p->path = *path; + goto err_free_label; + nfs_sb_active(dentry->d_sb); + p->dentry = dget(dentry); p->dir = parent; p->owner = sp; atomic_inc(&sp->so_count); - p->o_arg.fh = NFS_FH(dir); p->o_arg.open_flags = flags; p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); + /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS + * will return permission denied for all bits until close */ + if (!(flags & O_EXCL)) { + /* ask server to check for all possible rights as results + * are cached */ + p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | + NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; + } p->o_arg.clientid = server->nfs_client->cl_clientid; - p->o_arg.id = sp->so_owner_id.id; - p->o_arg.name = &p->path.dentry->d_name; + p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); + p->o_arg.id.uniquifier = sp->so_seqid.owner_id; + p->o_arg.name = &dentry->d_name; p->o_arg.server = server; - p->o_arg.bitmask = server->attr_bitmask; - p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; - if (flags & O_CREAT) { - u32 *s; + p->o_arg.bitmask = nfs4_bitmask(server, label); + p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; + p->o_arg.label = label; + p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); + switch (p->o_arg.claim) { + case NFS4_OPEN_CLAIM_NULL: + case NFS4_OPEN_CLAIM_DELEGATE_CUR: + case NFS4_OPEN_CLAIM_DELEGATE_PREV: + p->o_arg.fh = NFS_FH(dir); + break; + case NFS4_OPEN_CLAIM_PREVIOUS: + case NFS4_OPEN_CLAIM_FH: + case NFS4_OPEN_CLAIM_DELEG_CUR_FH: + case NFS4_OPEN_CLAIM_DELEG_PREV_FH: + p->o_arg.fh = NFS_FH(dentry->d_inode); + } + if (attrs != NULL && attrs->ia_valid != 0) { + __u32 verf[2]; p->o_arg.u.attrs = &p->attrs; memcpy(&p->attrs, attrs, sizeof(p->attrs)); - s = (u32 *) p->o_arg.u.verifier.data; - s[0] = jiffies; - s[1] = current->pid; + + verf[0] = jiffies; + verf[1] = current->pid; + memcpy(p->o_arg.u.verifier.data, verf, + sizeof(p->o_arg.u.verifier.data)); } p->c_arg.fh = &p->o_res.fh; p->c_arg.stateid = &p->o_res.stateid; @@ -780,7 +1041,10 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, nfs4_init_opendata_res(p); kref_init(&p->kref); return p; -err_free: + +err_free_label: + nfs4_label_free(p->f_label); +err_free_p: kfree(p); err: dput(parent); @@ -791,13 +1055,20 @@ static void nfs4_opendata_free(struct kref *kref) { struct nfs4_opendata *p = container_of(kref, struct nfs4_opendata, kref); + struct super_block *sb = p->dentry->d_sb; nfs_free_seqid(p->o_arg.seqid); if (p->state != NULL) nfs4_put_open_state(p->state); nfs4_put_state_owner(p->owner); + + nfs4_label_free(p->f_label); + dput(p->dir); - path_put(&p->path); + dput(p->dentry); + nfs_sb_deactive(sb); + nfs_fattr_free_names(&p->f_attr); + kfree(p->f_attr.mdsthreshold); kfree(p); } @@ -819,7 +1090,7 @@ static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode { int ret = 0; - if (open_mode & O_EXCL) + if (open_mode & (O_EXCL|O_TRUNC)) goto out; switch (mode & (FMODE_READ|FMODE_WRITE)) { case FMODE_READ: @@ -840,10 +1111,14 @@ out: static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) { + if (delegation == NULL) + return 0; if ((delegation->type & fmode) != fmode) return 0; if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) return 0; + if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) + return 0; nfs_mark_delegation_referenced(delegation); return 1; } @@ -863,11 +1138,71 @@ static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) nfs4_state_set_mode_locked(state, state->state | fmode); } -static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) +static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) +{ + struct nfs_client *clp = state->owner->so_server->nfs_client; + bool need_recover = false; + + if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) + need_recover = true; + if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) + need_recover = true; + if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) + need_recover = true; + if (need_recover) + nfs4_state_mark_reclaim_nograce(clp, state); +} + +static bool nfs_need_update_open_stateid(struct nfs4_state *state, + nfs4_stateid *stateid) +{ + if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) + return true; + if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { + nfs_test_and_clear_all_open_stateid(state); + return true; + } + if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) + return true; + return false; +} + +static void nfs_clear_open_stateid_locked(struct nfs4_state *state, + nfs4_stateid *stateid, fmode_t fmode) { + clear_bit(NFS_O_RDWR_STATE, &state->flags); + switch (fmode & (FMODE_READ|FMODE_WRITE)) { + case FMODE_WRITE: + clear_bit(NFS_O_RDONLY_STATE, &state->flags); + break; + case FMODE_READ: + clear_bit(NFS_O_WRONLY_STATE, &state->flags); + break; + case 0: + clear_bit(NFS_O_RDONLY_STATE, &state->flags); + clear_bit(NFS_O_WRONLY_STATE, &state->flags); + clear_bit(NFS_OPEN_STATE, &state->flags); + } + if (stateid == NULL) + return; + if (!nfs_need_update_open_stateid(state, stateid)) + return; if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) - memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); - memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); + nfs4_stateid_copy(&state->stateid, stateid); + nfs4_stateid_copy(&state->open_stateid, stateid); +} + +static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) +{ + write_seqlock(&state->seqlock); + nfs_clear_open_stateid_locked(state, stateid, fmode); + write_sequnlock(&state->seqlock); + if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) + nfs4_schedule_state_manager(state->owner->so_server->nfs_client); +} + +static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) +{ switch (fmode) { case FMODE_READ: set_bit(NFS_O_RDONLY_STATE, &state->flags); @@ -878,13 +1213,11 @@ static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid * case FMODE_READ|FMODE_WRITE: set_bit(NFS_O_RDWR_STATE, &state->flags); } -} - -static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) -{ - write_seqlock(&state->seqlock); - nfs_set_open_stateid_locked(state, stateid, fmode); - write_sequnlock(&state->seqlock); + if (!nfs_need_update_open_stateid(state, stateid)) + return; + if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) + nfs4_stateid_copy(&state->stateid, stateid); + nfs4_stateid_copy(&state->open_stateid, stateid); } static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) @@ -895,7 +1228,7 @@ static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_s */ write_seqlock(&state->seqlock); if (deleg_stateid != NULL) { - memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); + nfs4_stateid_copy(&state->stateid, deleg_stateid); set_bit(NFS_DELEGATED_STATE, &state->flags); } if (open_stateid != NULL) @@ -920,13 +1253,14 @@ static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stat goto no_delegation; spin_lock(&deleg_cur->lock); - if (nfsi->delegation != deleg_cur || + if (rcu_dereference(nfsi->delegation) != deleg_cur || + test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || (deleg_cur->type & fmode) != fmode) goto no_delegation_unlock; if (delegation == NULL) delegation = &deleg_cur->stateid; - else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) + else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) goto no_delegation_unlock; nfs_mark_delegation_referenced(deleg_cur); @@ -941,6 +1275,8 @@ no_delegation: __update_open_stateid(state, open_stateid, NULL, fmode); ret = 1; } + if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) + nfs4_schedule_state_manager(state->owner->so_server->nfs_client); return ret; } @@ -957,7 +1293,7 @@ static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmo return; } rcu_read_unlock(); - nfs_inode_return_delegation(inode); + nfs4_inode_return_delegation(inode); } static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) @@ -965,7 +1301,7 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) struct nfs4_state *state = opendata->state; struct nfs_inode *nfsi = NFS_I(state->inode); struct nfs_delegation *delegation; - int open_mode = opendata->o_arg.open_flags & O_EXCL; + int open_mode = opendata->o_arg.open_flags; fmode_t fmode = opendata->o_arg.fmode; nfs4_stateid stateid; int ret = -EAGAIN; @@ -982,17 +1318,19 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) } rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); - if (delegation == NULL || - !can_open_delegated(delegation, fmode)) { + if (!can_open_delegated(delegation, fmode)) { rcu_read_unlock(); break; } /* Save the delegation */ - memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); + nfs4_stateid_copy(&stateid, &delegation->stateid); rcu_read_unlock(); - ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); - if (ret != 0) - goto out; + nfs_release_seqid(opendata->o_arg.seqid); + if (!opendata->is_recover) { + ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); + if (ret != 0) + goto out; + } ret = -EAGAIN; /* Try to update the stateid using the delegation */ @@ -1006,11 +1344,75 @@ out_return_state: return state; } -static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) +static void +nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) +{ + struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; + struct nfs_delegation *delegation; + int delegation_flags = 0; + + rcu_read_lock(); + delegation = rcu_dereference(NFS_I(state->inode)->delegation); + if (delegation) + delegation_flags = delegation->flags; + rcu_read_unlock(); + if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { + pr_err_ratelimited("NFS: Broken NFSv4 server %s is " + "returning a delegation for " + "OPEN(CLAIM_DELEGATE_CUR)\n", + clp->cl_hostname); + } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) + nfs_inode_set_delegation(state->inode, + data->owner->so_cred, + &data->o_res); + else + nfs_inode_reclaim_delegation(state->inode, + data->owner->so_cred, + &data->o_res); +} + +/* + * Check the inode attributes against the CLAIM_PREVIOUS returned attributes + * and update the nfs4_state. + */ +static struct nfs4_state * +_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) +{ + struct inode *inode = data->state->inode; + struct nfs4_state *state = data->state; + int ret; + + if (!data->rpc_done) { + if (data->rpc_status) { + ret = data->rpc_status; + goto err; + } + /* cached opens have already been processed */ + goto update; + } + + ret = nfs_refresh_inode(inode, &data->f_attr); + if (ret) + goto err; + + if (data->o_res.delegation_type != 0) + nfs4_opendata_check_deleg(data, state); +update: + update_open_stateid(state, &data->o_res.stateid, NULL, + data->o_arg.fmode); + atomic_inc(&state->count); + + return state; +err: + return ERR_PTR(ret); + +} + +static struct nfs4_state * +_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) { struct inode *inode; struct nfs4_state *state = NULL; - struct nfs_delegation *delegation; int ret; if (!data->rpc_done) { @@ -1021,7 +1423,7 @@ static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data ret = -EAGAIN; if (!(data->f_attr.valid & NFS_ATTR_FATTR)) goto err; - inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); + inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); ret = PTR_ERR(inode); if (IS_ERR(inode)) goto err; @@ -1029,28 +1431,13 @@ static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data state = nfs4_get_open_state(inode, data->owner); if (state == NULL) goto err_put_inode; - if (data->o_res.delegation_type != 0) { - int delegation_flags = 0; - - rcu_read_lock(); - delegation = rcu_dereference(NFS_I(inode)->delegation); - if (delegation) - delegation_flags = delegation->flags; - rcu_read_unlock(); - if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) - nfs_inode_set_delegation(state->inode, - data->owner->so_cred, - &data->o_res); - else - nfs_inode_reclaim_delegation(state->inode, - data->owner->so_cred, - &data->o_res); - } - + if (data->o_res.delegation_type != 0) + nfs4_opendata_check_deleg(data, state); update_open_stateid(state, &data->o_res.stateid, NULL, data->o_arg.fmode); iput(inode); out: + nfs_release_seqid(data->o_arg.seqid); return state; err_put_inode: iput(inode); @@ -1058,6 +1445,14 @@ err: return ERR_PTR(ret); } +static struct nfs4_state * +nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) +{ + if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) + return _nfs4_opendata_reclaim_to_nfs4_state(data); + return _nfs4_opendata_to_nfs4_state(data); +} + static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) { struct nfs_inode *nfsi = NFS_I(state->inode); @@ -1075,11 +1470,13 @@ static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state * return ERR_PTR(-ENOENT); } -static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) +static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, + struct nfs4_state *state, enum open_claim_type4 claim) { struct nfs4_opendata *opendata; - opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS); + opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, + NULL, NULL, claim, GFP_NOFS); if (opendata == NULL) return ERR_PTR(-ENOMEM); opendata->state = state; @@ -1103,7 +1500,7 @@ static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmod newstate = nfs4_opendata_to_nfs4_state(opendata); if (IS_ERR(newstate)) return PTR_ERR(newstate); - nfs4_close_state(&opendata->path, newstate, fmode); + nfs4_close_state(newstate, fmode); *res = newstate; return 0; } @@ -1113,11 +1510,15 @@ static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state * struct nfs4_state *newstate; int ret; + /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ + clear_bit(NFS_O_RDWR_STATE, &state->flags); + clear_bit(NFS_O_WRONLY_STATE, &state->flags); + clear_bit(NFS_O_RDONLY_STATE, &state->flags); /* memory barrier prior to reading state->n_* */ clear_bit(NFS_DELEGATED_STATE, &state->flags); + clear_bit(NFS_OPEN_STATE, &state->flags); smp_rmb(); if (state->n_rdwr != 0) { - clear_bit(NFS_O_RDWR_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); if (ret != 0) return ret; @@ -1125,7 +1526,6 @@ static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state * return -ESTALE; } if (state->n_wronly != 0) { - clear_bit(NFS_O_WRONLY_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); if (ret != 0) return ret; @@ -1133,7 +1533,6 @@ static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state * return -ESTALE; } if (state->n_rdonly != 0) { - clear_bit(NFS_O_RDONLY_STATE, &state->flags); ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); if (ret != 0) return ret; @@ -1145,10 +1544,10 @@ static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state * * Check if we need to update the current stateid. */ if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && - memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { + !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { write_seqlock(&state->seqlock); if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) - memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); + nfs4_stateid_copy(&state->stateid, &state->open_stateid); write_sequnlock(&state->seqlock); } return 0; @@ -1165,11 +1564,10 @@ static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state fmode_t delegation_type = 0; int status; - opendata = nfs4_open_recoverdata_alloc(ctx, state); + opendata = nfs4_open_recoverdata_alloc(ctx, state, + NFS4_OPEN_CLAIM_PREVIOUS); if (IS_ERR(opendata)) return PTR_ERR(opendata); - opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; - opendata->o_arg.fh = NFS_FH(state->inode); rcu_read_lock(); delegation = rcu_dereference(NFS_I(state->inode)->delegation); if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) @@ -1188,6 +1586,9 @@ static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state int err; do { err = _nfs4_do_open_reclaim(ctx, state); + trace_nfs4_open_reclaim(ctx, 0, err); + if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) + continue; if (err != -NFS4ERR_DELAY) break; nfs4_handle_exception(server, err, &exception); @@ -1202,87 +1603,97 @@ static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *sta ctx = nfs4_state_find_open_context(state); if (IS_ERR(ctx)) - return PTR_ERR(ctx); + return -EAGAIN; ret = nfs4_do_open_reclaim(ctx, state); put_nfs_open_context(ctx); return ret; } -static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) +static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) { + switch (err) { + default: + printk(KERN_ERR "NFS: %s: unhandled error " + "%d.\n", __func__, err); + case 0: + case -ENOENT: + case -ESTALE: + break; + case -NFS4ERR_BADSESSION: + case -NFS4ERR_BADSLOT: + case -NFS4ERR_BAD_HIGH_SLOT: + case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: + case -NFS4ERR_DEADSESSION: + set_bit(NFS_DELEGATED_STATE, &state->flags); + nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); + return -EAGAIN; + case -NFS4ERR_STALE_CLIENTID: + case -NFS4ERR_STALE_STATEID: + set_bit(NFS_DELEGATED_STATE, &state->flags); + case -NFS4ERR_EXPIRED: + /* Don't recall a delegation if it was lost */ + nfs4_schedule_lease_recovery(server->nfs_client); + return -EAGAIN; + case -NFS4ERR_MOVED: + nfs4_schedule_migration_recovery(server); + return -EAGAIN; + case -NFS4ERR_LEASE_MOVED: + nfs4_schedule_lease_moved_recovery(server->nfs_client); + return -EAGAIN; + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_OPENMODE: + nfs_inode_find_state_and_recover(state->inode, + stateid); + nfs4_schedule_stateid_recovery(server, state); + return 0; + case -NFS4ERR_DELAY: + case -NFS4ERR_GRACE: + set_bit(NFS_DELEGATED_STATE, &state->flags); + ssleep(1); + return -EAGAIN; + case -ENOMEM: + case -NFS4ERR_DENIED: + /* kill_proc(fl->fl_pid, SIGLOST, 1); */ + return 0; + } + return err; +} + +int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) +{ + struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_opendata *opendata; - int ret; + int err; - opendata = nfs4_open_recoverdata_alloc(ctx, state); + opendata = nfs4_open_recoverdata_alloc(ctx, state, + NFS4_OPEN_CLAIM_DELEG_CUR_FH); if (IS_ERR(opendata)) return PTR_ERR(opendata); - opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; - memcpy(opendata->o_arg.u.delegation.data, stateid->data, - sizeof(opendata->o_arg.u.delegation.data)); - ret = nfs4_open_recover(opendata, state); + nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); + err = nfs4_open_recover(opendata, state); nfs4_opendata_put(opendata); - return ret; + return nfs4_handle_delegation_recall_error(server, state, stateid, err); } -int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) +static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) { - struct nfs4_exception exception = { }; - struct nfs_server *server = NFS_SERVER(state->inode); - int err; - do { - err = _nfs4_open_delegation_recall(ctx, state, stateid); - switch (err) { - case 0: - case -ENOENT: - case -ESTALE: - goto out; - case -NFS4ERR_BADSESSION: - case -NFS4ERR_BADSLOT: - case -NFS4ERR_BAD_HIGH_SLOT: - case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: - case -NFS4ERR_DEADSESSION: - nfs4_schedule_state_recovery( - server->nfs_client); - goto out; - case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_STALE_STATEID: - case -NFS4ERR_EXPIRED: - /* Don't recall a delegation if it was lost */ - nfs4_schedule_state_recovery(server->nfs_client); - goto out; - case -ERESTARTSYS: - /* - * The show must go on: exit, but mark the - * stateid as needing recovery. - */ - case -NFS4ERR_ADMIN_REVOKED: - case -NFS4ERR_BAD_STATEID: - nfs4_state_mark_reclaim_nograce(server->nfs_client, state); - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ - case -ENOMEM: - err = 0; - goto out; - } - err = nfs4_handle_exception(server, err, &exception); - } while (exception.retry); -out: - return err; + struct nfs4_opendata *data = calldata; + + nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args, + &data->c_res.seq_res, task); } static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; + nfs40_sequence_done(task, &data->c_res.seq_res); + data->rpc_status = task->tk_status; if (data->rpc_status == 0) { - memcpy(data->o_res.stateid.data, data->c_res.stateid.data, - sizeof(data->o_res.stateid.data)); + nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); nfs_confirm_seqid(&data->owner->so_seqid, 0); renew_lease(data->o_res.server, data->timestamp); data->rpc_done = 1; @@ -1302,12 +1713,13 @@ static void nfs4_open_confirm_release(void *calldata) goto out_free; state = nfs4_opendata_to_nfs4_state(data); if (!IS_ERR(state)) - nfs4_close_state(&data->path, state, data->o_arg.fmode); + nfs4_close_state(state, data->o_arg.fmode); out_free: nfs4_opendata_put(data); } static const struct rpc_call_ops nfs4_open_confirm_ops = { + .rpc_call_prepare = nfs4_open_confirm_prepare, .rpc_call_done = nfs4_open_confirm_done, .rpc_release = nfs4_open_confirm_release, }; @@ -1335,6 +1747,7 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) }; int status; + nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); kref_get(&data->kref); data->rpc_done = 0; data->rpc_status = 0; @@ -1356,9 +1769,10 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata) { struct nfs4_opendata *data = calldata; struct nfs4_state_owner *sp = data->owner; + struct nfs_client *clp = sp->so_server->nfs_client; if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) - return; + goto out_wait; /* * Check if we still need to send an OPEN call, or if we can use * a delegation instead. @@ -1370,36 +1784,46 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata) goto out_no_action; rcu_read_lock(); delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); - if (delegation != NULL && - test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { - rcu_read_unlock(); - goto out_no_action; - } + if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && + data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH && + can_open_delegated(delegation, data->o_arg.fmode)) + goto unlock_no_action; rcu_read_unlock(); } - /* Update sequence id. */ - data->o_arg.id = sp->so_owner_id.id; - data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; - if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { + /* Update client id. */ + data->o_arg.clientid = clp->cl_clientid; + switch (data->o_arg.claim) { + case NFS4_OPEN_CLAIM_PREVIOUS: + case NFS4_OPEN_CLAIM_DELEG_CUR_FH: + case NFS4_OPEN_CLAIM_DELEG_PREV_FH: + data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; + case NFS4_OPEN_CLAIM_FH: task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); } data->timestamp = jiffies; if (nfs4_setup_sequence(data->o_arg.server, &data->o_arg.seq_args, - &data->o_res.seq_res, 1, task)) - return; - rpc_call_start(task); + &data->o_res.seq_res, + task) != 0) + nfs_release_seqid(data->o_arg.seqid); + + /* Set the create mode (note dependency on the session type) */ + data->o_arg.createmode = NFS4_CREATE_UNCHECKED; + if (data->o_arg.open_flags & O_EXCL) { + data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; + if (nfs4_has_persistent_session(clp)) + data->o_arg.createmode = NFS4_CREATE_GUARDED; + else if (clp->cl_mvops->minor_version > 0) + data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; + } return; +unlock_no_action: + rcu_read_unlock(); out_no_action: task->tk_action = NULL; - -} - -static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs4_open_prepare(task, calldata); +out_wait: + nfs4_sequence_done(task, &data->o_res.seq_res); } static void nfs4_open_done(struct rpc_task *task, void *calldata) @@ -1412,7 +1836,8 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata) return; if (task->tk_status == 0) { - switch (data->o_res.f_attr->mode & S_IFMT) { + if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { + switch (data->o_res.f_attr->mode & S_IFMT) { case S_IFREG: break; case S_IFLNK: @@ -1423,6 +1848,7 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata) break; default: data->rpc_status = -ENOTDIR; + } } renew_lease(data->o_res.server, data->timestamp); if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) @@ -1447,7 +1873,7 @@ static void nfs4_open_release(void *calldata) goto out_free; state = nfs4_opendata_to_nfs4_state(data); if (!IS_ERR(state)) - nfs4_close_state(&data->path, state, data->o_arg.fmode); + nfs4_close_state(state, data->o_arg.fmode); out_free: nfs4_opendata_put(data); } @@ -1458,12 +1884,6 @@ static const struct rpc_call_ops nfs4_open_ops = { .rpc_release = nfs4_open_release, }; -static const struct rpc_call_ops nfs4_recover_open_ops = { - .rpc_call_prepare = nfs4_recover_open_prepare, - .rpc_call_done = nfs4_open_done, - .rpc_release = nfs4_open_release, -}; - static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) { struct inode *dir = data->dir->d_inode; @@ -1487,12 +1907,16 @@ static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) }; int status; + nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); kref_get(&data->kref); data->rpc_done = 0; data->rpc_status = 0; data->cancelled = 0; - if (isrecover) - task_setup_data.callback_ops = &nfs4_recover_open_ops; + data->is_recover = 0; + if (isrecover) { + nfs4_set_sequence_privileged(&o_arg->seq_args); + data->is_recover = 1; + } task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -1517,7 +1941,7 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data) if (status != 0 || !data->rpc_done) return status; - nfs_refresh_inode(dir, o_res->dir_attr); + nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { status = _nfs4_proc_open_confirm(data); @@ -1528,6 +1952,43 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data) return status; } +static int nfs4_opendata_access(struct rpc_cred *cred, + struct nfs4_opendata *opendata, + struct nfs4_state *state, fmode_t fmode, + int openflags) +{ + struct nfs_access_entry cache; + u32 mask; + + /* access call failed or for some reason the server doesn't + * support any access modes -- defer access call until later */ + if (opendata->o_res.access_supported == 0) + return 0; + + mask = 0; + /* don't check MAY_WRITE - a newly created file may not have + * write mode bits, but POSIX allows the creating process to write. + * use openflags to check for exec, because fmode won't + * always have FMODE_EXEC set when file open for exec. */ + if (openflags & __FMODE_EXEC) { + /* ONLY check for exec rights */ + mask = MAY_EXEC; + } else if (fmode & FMODE_READ) + mask = MAY_READ; + + cache.cred = cred; + cache.jiffies = jiffies; + nfs_access_set_mask(&cache, opendata->o_res.access_result); + nfs_access_add_cache(state->inode, &cache); + + if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) + return 0; + + /* even though OPEN succeeded, access is denied. Close the file */ + nfs4_close_state(state, fmode); + return -EACCES; +} + /* * Note: On error, nfs4_proc_open will free the struct nfs4_opendata */ @@ -1540,14 +2001,24 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) int status; status = nfs4_run_open_task(data, 0); - if (status != 0 || !data->rpc_done) + if (!data->rpc_done) + return status; + if (status != 0) { + if (status == -NFS4ERR_BADNAME && + !(o_arg->open_flags & O_CREAT)) + return -ENOENT; return status; + } + + nfs_fattr_map_and_free_names(server, &data->f_attr); if (o_arg->open_flags & O_CREAT) { update_changeattr(dir, &o_res->cinfo); - nfs_post_op_update_inode(dir, o_res->dir_attr); - } else - nfs_refresh_inode(dir, o_res->dir_attr); + if (o_arg->open_flags & O_EXCL) + data->file_created = 1; + else if (o_res->cinfo.before != o_res->cinfo.after) + data->file_created = 1; + } if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) server->caps &= ~NFS_CAP_POSIX_LOCK; if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { @@ -1556,27 +2027,13 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) return status; } if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) - _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); + nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); return 0; } static int nfs4_recover_expired_lease(struct nfs_server *server) { - struct nfs_client *clp = server->nfs_client; - unsigned int loop; - int ret; - - for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { - ret = nfs4_wait_clnt_recover(clp); - if (ret != 0) - break; - if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && - !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) - break; - nfs4_schedule_state_recovery(clp); - ret = -EIO; - } - return ret; + return nfs4_client_recover_expired_lease(server->nfs_client); } /* @@ -1589,12 +2046,13 @@ static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *s struct nfs4_opendata *opendata; int ret; - opendata = nfs4_open_recoverdata_alloc(ctx, state); + opendata = nfs4_open_recoverdata_alloc(ctx, state, + NFS4_OPEN_CLAIM_FH); if (IS_ERR(opendata)) return PTR_ERR(opendata); ret = nfs4_open_recover(opendata, state); if (ret == -ESTALE) - d_drop(ctx->path.dentry); + d_drop(ctx->dentry); nfs4_opendata_put(opendata); return ret; } @@ -1607,6 +2065,9 @@ static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state do { err = _nfs4_open_expired(ctx, state); + trace_nfs4_open_expired(ctx, 0, err); + if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) + continue; switch (err) { default: goto out; @@ -1627,12 +2088,103 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta ctx = nfs4_state_find_open_context(state); if (IS_ERR(ctx)) - return PTR_ERR(ctx); + return -EAGAIN; ret = nfs4_do_open_expired(ctx, state); put_nfs_open_context(ctx); return ret; } +#if defined(CONFIG_NFS_V4_1) +static void nfs41_clear_delegation_stateid(struct nfs4_state *state) +{ + struct nfs_server *server = NFS_SERVER(state->inode); + nfs4_stateid *stateid = &state->stateid; + struct nfs_delegation *delegation; + struct rpc_cred *cred = NULL; + int status = -NFS4ERR_BAD_STATEID; + + /* If a state reset has been done, test_stateid is unneeded */ + if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) + return; + + /* Get the delegation credential for use by test/free_stateid */ + rcu_read_lock(); + delegation = rcu_dereference(NFS_I(state->inode)->delegation); + if (delegation != NULL && + nfs4_stateid_match(&delegation->stateid, stateid)) { + cred = get_rpccred(delegation->cred); + rcu_read_unlock(); + status = nfs41_test_stateid(server, stateid, cred); + trace_nfs4_test_delegation_stateid(state, NULL, status); + } else + rcu_read_unlock(); + + if (status != NFS_OK) { + /* Free the stateid unless the server explicitly + * informs us the stateid is unrecognized. */ + if (status != -NFS4ERR_BAD_STATEID) + nfs41_free_stateid(server, stateid, cred); + nfs_remove_bad_delegation(state->inode); + + write_seqlock(&state->seqlock); + nfs4_stateid_copy(&state->stateid, &state->open_stateid); + write_sequnlock(&state->seqlock); + clear_bit(NFS_DELEGATED_STATE, &state->flags); + } + + if (cred != NULL) + put_rpccred(cred); +} + +/** + * nfs41_check_open_stateid - possibly free an open stateid + * + * @state: NFSv4 state for an inode + * + * Returns NFS_OK if recovery for this stateid is now finished. + * Otherwise a negative NFS4ERR value is returned. + */ +static int nfs41_check_open_stateid(struct nfs4_state *state) +{ + struct nfs_server *server = NFS_SERVER(state->inode); + nfs4_stateid *stateid = &state->open_stateid; + struct rpc_cred *cred = state->owner->so_cred; + int status; + + /* If a state reset has been done, test_stateid is unneeded */ + if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && + (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && + (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) + return -NFS4ERR_BAD_STATEID; + + status = nfs41_test_stateid(server, stateid, cred); + trace_nfs4_test_open_stateid(state, NULL, status); + if (status != NFS_OK) { + /* Free the stateid unless the server explicitly + * informs us the stateid is unrecognized. */ + if (status != -NFS4ERR_BAD_STATEID) + nfs41_free_stateid(server, stateid, cred); + + clear_bit(NFS_O_RDONLY_STATE, &state->flags); + clear_bit(NFS_O_WRONLY_STATE, &state->flags); + clear_bit(NFS_O_RDWR_STATE, &state->flags); + clear_bit(NFS_OPEN_STATE, &state->flags); + } + return status; +} + +static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) +{ + int status; + + nfs41_clear_delegation_stateid(state); + status = nfs41_check_open_stateid(state); + if (status != NFS_OK) + status = nfs4_open_expired(sp, state); + return status; +} +#endif + /* * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* * fields corresponding to attributes that were used to store the verifier. @@ -1649,80 +2201,180 @@ static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct sattr->ia_valid |= ATTR_MTIME; } +static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, + fmode_t fmode, + int flags, + struct nfs_open_context *ctx) +{ + struct nfs4_state_owner *sp = opendata->owner; + struct nfs_server *server = sp->so_server; + struct dentry *dentry; + struct nfs4_state *state; + unsigned int seq; + int ret; + + seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); + + ret = _nfs4_proc_open(opendata); + if (ret != 0) + goto out; + + state = nfs4_opendata_to_nfs4_state(opendata); + ret = PTR_ERR(state); + if (IS_ERR(state)) + goto out; + if (server->caps & NFS_CAP_POSIX_LOCK) + set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); + + dentry = opendata->dentry; + if (dentry->d_inode == NULL) { + /* FIXME: Is this d_drop() ever needed? */ + d_drop(dentry); + dentry = d_add_unique(dentry, igrab(state->inode)); + if (dentry == NULL) { + dentry = opendata->dentry; + } else if (dentry != ctx->dentry) { + dput(ctx->dentry); + ctx->dentry = dget(dentry); + } + nfs_set_verifier(dentry, + nfs_save_change_attribute(opendata->dir->d_inode)); + } + + ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); + if (ret != 0) + goto out; + + ctx->state = state; + if (dentry->d_inode == state->inode) { + nfs_inode_attach_open_context(ctx); + if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) + nfs4_schedule_stateid_recovery(server, state); + } +out: + return ret; +} + /* * Returns a referenced nfs4_state */ -static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) +static int _nfs4_do_open(struct inode *dir, + struct nfs_open_context *ctx, + int flags, + struct iattr *sattr, + struct nfs4_label *label, + int *opened) { struct nfs4_state_owner *sp; struct nfs4_state *state = NULL; struct nfs_server *server = NFS_SERVER(dir); struct nfs4_opendata *opendata; + struct dentry *dentry = ctx->dentry; + struct rpc_cred *cred = ctx->cred; + struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; + fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); + enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; + struct nfs4_label *olabel = NULL; int status; /* Protect against reboot recovery conflicts */ status = -ENOMEM; - if (!(sp = nfs4_get_state_owner(server, cred))) { + sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); + if (sp == NULL) { dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); goto out_err; } status = nfs4_recover_expired_lease(server); if (status != 0) goto err_put_state_owner; - if (path->dentry->d_inode != NULL) - nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); + if (dentry->d_inode != NULL) + nfs4_return_incompatible_delegation(dentry->d_inode, fmode); status = -ENOMEM; - opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL); + if (dentry->d_inode) + claim = NFS4_OPEN_CLAIM_FH; + opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, + label, claim, GFP_KERNEL); if (opendata == NULL) goto err_put_state_owner; - if (path->dentry->d_inode != NULL) - opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); + if (label) { + olabel = nfs4_label_alloc(server, GFP_KERNEL); + if (IS_ERR(olabel)) { + status = PTR_ERR(olabel); + goto err_opendata_put; + } + } - status = _nfs4_proc_open(opendata); - if (status != 0) - goto err_opendata_put; + if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { + if (!opendata->f_attr.mdsthreshold) { + opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); + if (!opendata->f_attr.mdsthreshold) + goto err_free_label; + } + opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; + } + if (dentry->d_inode != NULL) + opendata->state = nfs4_get_open_state(dentry->d_inode, sp); - state = nfs4_opendata_to_nfs4_state(opendata); - status = PTR_ERR(state); - if (IS_ERR(state)) - goto err_opendata_put; - if (server->caps & NFS_CAP_POSIX_LOCK) - set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); + status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); + if (status != 0) + goto err_free_label; + state = ctx->state; - if (opendata->o_arg.open_flags & O_EXCL) { + if ((opendata->o_arg.open_flags & O_EXCL) && + (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { nfs4_exclusive_attrset(opendata, sattr); nfs_fattr_init(opendata->o_res.f_attr); status = nfs4_do_setattr(state->inode, cred, opendata->o_res.f_attr, sattr, - state); - if (status == 0) + state, label, olabel); + if (status == 0) { nfs_setattr_update_inode(state->inode, sattr); - nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); + nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); + nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); + } } + if (opendata->file_created) + *opened |= FILE_CREATED; + + if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { + *ctx_th = opendata->f_attr.mdsthreshold; + opendata->f_attr.mdsthreshold = NULL; + } + + nfs4_label_free(olabel); + nfs4_opendata_put(opendata); nfs4_put_state_owner(sp); - *res = state; return 0; +err_free_label: + nfs4_label_free(olabel); err_opendata_put: nfs4_opendata_put(opendata); err_put_state_owner: nfs4_put_state_owner(sp); out_err: - *res = NULL; return status; } -static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) +static struct nfs4_state *nfs4_do_open(struct inode *dir, + struct nfs_open_context *ctx, + int flags, + struct iattr *sattr, + struct nfs4_label *label, + int *opened) { + struct nfs_server *server = NFS_SERVER(dir); struct nfs4_exception exception = { }; struct nfs4_state *res; int status; do { - status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); + status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); + res = ctx->state; + trace_nfs4_open_file(ctx, flags, status); if (status == 0) break; /* NOTE: BAD_SEQID means the server and client disagree about the @@ -1737,7 +2389,7 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmo * the user though... */ if (status == -NFS4ERR_BAD_SEQID) { - printk(KERN_WARNING "NFS: v4 server %s " + pr_warn_ratelimited("NFS: v4 server %s " " returned a bad sequence-id error!\n", NFS_SERVER(dir)->nfs_client->cl_hostname); exception.retry = 1; @@ -1758,7 +2410,9 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmo exception.retry = 1; continue; } - res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), + if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) + continue; + res = ERR_PTR(nfs4_handle_exception(server, status, &exception)); } while (exception.retry); return res; @@ -1766,7 +2420,8 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmo static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, - struct nfs4_state *state) + struct nfs4_state *state, struct nfs4_label *ilabel, + struct nfs4_label *olabel) { struct nfs_server *server = NFS_SERVER(inode); struct nfs_setattrargs arg = { @@ -1774,9 +2429,11 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, .iap = sattr, .server = server, .bitmask = server->attr_bitmask, + .label = ilabel, }; struct nfs_setattrres res = { .fattr = fattr, + .label = olabel, .server = server, }; struct rpc_message msg = { @@ -1786,18 +2443,36 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, .rpc_cred = cred, }; unsigned long timestamp = jiffies; + fmode_t fmode; + bool truncate; int status; + arg.bitmask = nfs4_bitmask(server, ilabel); + if (ilabel) + arg.bitmask = nfs4_bitmask(server, olabel); + nfs_fattr_init(fattr); - if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { + /* Servers should only apply open mode checks for file size changes */ + truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; + fmode = truncate ? FMODE_WRITE : FMODE_READ; + + if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) { /* Use that stateid */ - } else if (state != NULL) { - nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); + } else if (truncate && state != NULL) { + struct nfs_lockowner lockowner = { + .l_owner = current->files, + .l_pid = current->tgid, + }; + if (!nfs4_valid_open_stateid(state)) + return -EBADF; + if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, + &lockowner) == -EIO) + return -EBADF; } else - memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); + nfs4_stateid_copy(&arg.stateid, &zero_stateid); - status = nfs4_call_sync(server, &msg, &arg, &res, 1); + status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); if (status == 0 && state != NULL) renew_lease(server, timestamp); return status; @@ -1805,71 +2480,88 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, struct nfs_fattr *fattr, struct iattr *sattr, - struct nfs4_state *state) + struct nfs4_state *state, struct nfs4_label *ilabel, + struct nfs4_label *olabel) { struct nfs_server *server = NFS_SERVER(inode); - struct nfs4_exception exception = { }; + struct nfs4_exception exception = { + .state = state, + .inode = inode, + }; int err; do { - err = nfs4_handle_exception(server, - _nfs4_do_setattr(inode, cred, fattr, sattr, state), - &exception); + err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); + trace_nfs4_setattr(inode, err); + switch (err) { + case -NFS4ERR_OPENMODE: + if (!(sattr->ia_valid & ATTR_SIZE)) { + pr_warn_once("NFSv4: server %s is incorrectly " + "applying open mode checks to " + "a SETATTR that is not " + "changing file size.\n", + server->nfs_client->cl_hostname); + } + if (state && !(state->state & FMODE_WRITE)) { + err = -EBADF; + if (sattr->ia_valid & ATTR_OPEN) + err = -EACCES; + goto out; + } + } + err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); +out: return err; } struct nfs4_closedata { - struct path path; struct inode *inode; struct nfs4_state *state; struct nfs_closeargs arg; struct nfs_closeres res; struct nfs_fattr fattr; unsigned long timestamp; + bool roc; + u32 roc_barrier; }; static void nfs4_free_closedata(void *data) { struct nfs4_closedata *calldata = data; struct nfs4_state_owner *sp = calldata->state->owner; + struct super_block *sb = calldata->state->inode->i_sb; + if (calldata->roc) + pnfs_roc_release(calldata->state->inode); nfs4_put_open_state(calldata->state); nfs_free_seqid(calldata->arg.seqid); nfs4_put_state_owner(sp); - path_put(&calldata->path); + nfs_sb_deactive(sb); kfree(calldata); } -static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, - fmode_t fmode) -{ - spin_lock(&state->owner->so_lock); - if (!(fmode & FMODE_READ)) - clear_bit(NFS_O_RDONLY_STATE, &state->flags); - if (!(fmode & FMODE_WRITE)) - clear_bit(NFS_O_WRONLY_STATE, &state->flags); - clear_bit(NFS_O_RDWR_STATE, &state->flags); - spin_unlock(&state->owner->so_lock); -} - static void nfs4_close_done(struct rpc_task *task, void *data) { struct nfs4_closedata *calldata = data; struct nfs4_state *state = calldata->state; struct nfs_server *server = NFS_SERVER(calldata->inode); + dprintk("%s: begin!\n", __func__); if (!nfs4_sequence_done(task, &calldata->res.seq_res)) return; + trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); /* hmm. we are done with the inode, and in the process of freeing * the state_owner. we keep this around to process errors */ switch (task->tk_status) { case 0: - nfs_set_open_stateid(state, &calldata->res.stateid, 0); + if (calldata->roc) + pnfs_roc_set_barrier(state->inode, + calldata->roc_barrier); + nfs_clear_open_stateid(state, &calldata->res.stateid, 0); renew_lease(server, calldata->timestamp); - nfs4_close_clear_stateid_flags(state, - calldata->arg.fmode); - break; + goto out_release; + case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_OLD_STATEID: case -NFS4ERR_BAD_STATEID: @@ -1877,21 +2569,28 @@ static void nfs4_close_done(struct rpc_task *task, void *data) if (calldata->arg.fmode == 0) break; default: - if (nfs4_async_handle_error(task, server, state) == -EAGAIN) + if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { rpc_restart_call_prepare(task); + goto out_release; + } } + nfs_clear_open_stateid(state, NULL, calldata->arg.fmode); +out_release: nfs_release_seqid(calldata->arg.seqid); nfs_refresh_inode(calldata->inode, calldata->res.fattr); + dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); } static void nfs4_close_prepare(struct rpc_task *task, void *data) { struct nfs4_closedata *calldata = data; struct nfs4_state *state = calldata->state; + struct inode *inode = calldata->inode; int call_close = 0; + dprintk("%s: begin!\n", __func__); if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) - return; + goto out_wait; task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; calldata->arg.fmode = FMODE_READ|FMODE_WRITE; @@ -1909,24 +2608,37 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) calldata->arg.fmode &= ~FMODE_WRITE; } } + if (!nfs4_valid_open_stateid(state)) + call_close = 0; spin_unlock(&state->owner->so_lock); if (!call_close) { /* Note: exit _without_ calling nfs4_close_done */ - task->tk_action = NULL; - return; + goto out_no_action; } - if (calldata->arg.fmode == 0) + if (calldata->arg.fmode == 0) { task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; + if (calldata->roc && + pnfs_roc_drain(inode, &calldata->roc_barrier, task)) { + nfs_release_seqid(calldata->arg.seqid); + goto out_wait; + } + } nfs_fattr_init(calldata->res.fattr); calldata->timestamp = jiffies; - if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), - &calldata->arg.seq_args, &calldata->res.seq_res, - 1, task)) - return; - rpc_call_start(task); + if (nfs4_setup_sequence(NFS_SERVER(inode), + &calldata->arg.seq_args, + &calldata->res.seq_res, + task) != 0) + nfs_release_seqid(calldata->arg.seqid); + dprintk("%s: done!\n", __func__); + return; +out_no_action: + task->tk_action = NULL; +out_wait: + nfs4_sequence_done(task, &calldata->res.seq_res); } static const struct rpc_call_ops nfs4_close_ops = { @@ -1946,7 +2658,7 @@ static const struct rpc_call_ops nfs4_close_ops = { * * NOTE: Caller must be holding the sp->so_owner semaphore! */ -int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) +int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) { struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_closedata *calldata; @@ -1965,9 +2677,13 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, i }; int status = -ENOMEM; + nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, + &task_setup_data.rpc_client, &msg); + calldata = kzalloc(sizeof(*calldata), gfp_mask); if (calldata == NULL) goto out; + nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); calldata->inode = state->inode; calldata->state = state; calldata->arg.fh = NFS_FH(state->inode); @@ -1981,11 +2697,11 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, i calldata->res.fattr = &calldata->fattr; calldata->res.seqid = calldata->arg.seqid; calldata->res.server = server; - path_get(path); - calldata->path = *path; + calldata->roc = pnfs_roc(state->inode); + nfs_sb_active(calldata->inode->i_sb); - msg.rpc_argp = &calldata->arg, - msg.rpc_resp = &calldata->res, + msg.rpc_argp = &calldata->arg; + msg.rpc_resp = &calldata->res; task_setup_data.callback_data = calldata; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) @@ -2004,16 +2720,22 @@ out: } static struct inode * -nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) +nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, + int open_flags, struct iattr *attr, int *opened) { struct nfs4_state *state; + struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; + + label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); /* Protect against concurrent sillydeletes */ - state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred); + state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); + + nfs4_label_release_security(label); + if (IS_ERR(state)) return ERR_CAST(state); - ctx->state = state; - return igrab(state->inode); + return state->inode; } static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) @@ -2021,11 +2743,15 @@ static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) if (ctx->state == NULL) return; if (is_sync) - nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); + nfs4_close_sync(ctx->state, ctx->mode); else - nfs4_close_state(&ctx->path, ctx->state, ctx->mode); + nfs4_close_state(ctx->state, ctx->mode); } +#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) +#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) +#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) + static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) { struct nfs4_server_caps_arg args = { @@ -2039,15 +2765,29 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f }; int status; - status = nfs4_call_sync(server, &msg, &args, &res, 0); + status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (status == 0) { + /* Sanity check the server answers */ + switch (server->nfs_client->cl_minorversion) { + case 0: + res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; + res.attr_bitmask[2] = 0; + break; + case 1: + res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; + break; + case 2: + res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; + } memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| NFS_CAP_SYMLINKS|NFS_CAP_FILEID| NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| - NFS_CAP_CTIME|NFS_CAP_MTIME); - if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) + NFS_CAP_CTIME|NFS_CAP_MTIME| + NFS_CAP_SECURITY_LABEL); + if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && + res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) server->caps |= NFS_CAP_ACLS; if (res.has_links != 0) server->caps |= NFS_CAP_HARDLINKS; @@ -2069,11 +2809,20 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f server->caps |= NFS_CAP_CTIME; if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) server->caps |= NFS_CAP_MTIME; +#ifdef CONFIG_NFS_V4_SECURITY_LABEL + if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) + server->caps |= NFS_CAP_SECURITY_LABEL; +#endif + memcpy(server->attr_bitmask_nl, res.attr_bitmask, + sizeof(server->attr_bitmask)); + server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; + server->cache_consistency_bitmask[2] = 0; server->acl_bitmask = res.acl_bitmask; + server->fh_expire_type = res.fh_expire_type; } return status; @@ -2094,8 +2843,9 @@ int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { + u32 bitmask[3]; struct nfs4_lookup_root_arg args = { - .bitmask = nfs4_fattr_bitmap, + .bitmask = bitmask, }; struct nfs4_lookup_res res = { .server = server, @@ -2108,8 +2858,15 @@ static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = &res, }; + bitmask[0] = nfs4_fattr_bitmap[0]; + bitmask[1] = nfs4_fattr_bitmap[1]; + /* + * Process the label in the upcoming getfattr + */ + bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; + nfs_fattr_init(info->fattr); - return nfs4_call_sync(server, &msg, &args, &res, 0); + return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, @@ -2118,35 +2875,174 @@ static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(server, - _nfs4_lookup_root(server, fhandle, info), - &exception); + err = _nfs4_lookup_root(server, fhandle, info); + trace_nfs4_lookup_root(server, fhandle, info->fattr, err); + switch (err) { + case 0: + case -NFS4ERR_WRONGSEC: + goto out; + default: + err = nfs4_handle_exception(server, err, &exception); + } } while (exception.retry); +out: return err; } +static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info, rpc_authflavor_t flavor) +{ + struct rpc_auth_create_args auth_args = { + .pseudoflavor = flavor, + }; + struct rpc_auth *auth; + int ret; + + auth = rpcauth_create(&auth_args, server->client); + if (IS_ERR(auth)) { + ret = -EACCES; + goto out; + } + ret = nfs4_lookup_root(server, fhandle, info); +out: + return ret; +} + /* - * get the file handle for the "/" directory on the server + * Retry pseudoroot lookup with various security flavors. We do this when: + * + * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC + * NFSv4.1: the server does not support the SECINFO_NO_NAME operation + * + * Returns zero on success, or a negative NFS4ERR value, or a + * negative errno value. */ -static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, +static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { + /* Per 3530bis 15.33.5 */ + static const rpc_authflavor_t flav_array[] = { + RPC_AUTH_GSS_KRB5P, + RPC_AUTH_GSS_KRB5I, + RPC_AUTH_GSS_KRB5, + RPC_AUTH_UNIX, /* courtesy */ + RPC_AUTH_NULL, + }; + int status = -EPERM; + size_t i; + + if (server->auth_info.flavor_len > 0) { + /* try each flavor specified by user */ + for (i = 0; i < server->auth_info.flavor_len; i++) { + status = nfs4_lookup_root_sec(server, fhandle, info, + server->auth_info.flavors[i]); + if (status == -NFS4ERR_WRONGSEC || status == -EACCES) + continue; + break; + } + } else { + /* no flavors specified by user, try default list */ + for (i = 0; i < ARRAY_SIZE(flav_array); i++) { + status = nfs4_lookup_root_sec(server, fhandle, info, + flav_array[i]); + if (status == -NFS4ERR_WRONGSEC || status == -EACCES) + continue; + break; + } + } + + /* + * -EACCESS could mean that the user doesn't have correct permissions + * to access the mount. It could also mean that we tried to mount + * with a gss auth flavor, but rpc.gssd isn't running. Either way, + * existing mount programs don't handle -EACCES very well so it should + * be mapped to -EPERM instead. + */ + if (status == -EACCES) + status = -EPERM; + return status; +} + +static int nfs4_do_find_root_sec(struct nfs_server *server, + struct nfs_fh *fhandle, struct nfs_fsinfo *info) +{ + int mv = server->nfs_client->cl_minorversion; + return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); +} + +/** + * nfs4_proc_get_rootfh - get file handle for server's pseudoroot + * @server: initialized nfs_server handle + * @fhandle: we fill in the pseudo-fs root file handle + * @info: we fill in an FSINFO struct + * @auth_probe: probe the auth flavours + * + * Returns zero on success, or a negative errno. + */ +int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info, + bool auth_probe) +{ int status; - status = nfs4_lookup_root(server, fhandle, info); + switch (auth_probe) { + case false: + status = nfs4_lookup_root(server, fhandle, info); + if (status != -NFS4ERR_WRONGSEC) + break; + default: + status = nfs4_do_find_root_sec(server, fhandle, info); + } + if (status == 0) status = nfs4_server_capabilities(server, fhandle); if (status == 0) status = nfs4_do_fsinfo(server, fhandle, info); + return nfs4_map_errors(status); } +static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, + struct nfs_fsinfo *info) +{ + int error; + struct nfs_fattr *fattr = info->fattr; + struct nfs4_label *label = NULL; + + error = nfs4_server_capabilities(server, mntfh); + if (error < 0) { + dprintk("nfs4_get_root: getcaps error = %d\n", -error); + return error; + } + + label = nfs4_label_alloc(server, GFP_KERNEL); + if (IS_ERR(label)) + return PTR_ERR(label); + + error = nfs4_proc_getattr(server, mntfh, fattr, label); + if (error < 0) { + dprintk("nfs4_get_root: getattr error = %d\n", -error); + goto err_free_label; + } + + if (fattr->valid & NFS_ATTR_FATTR_FSID && + !nfs_fsid_equal(&server->fsid, &fattr->fsid)) + memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); + +err_free_label: + nfs4_label_free(label); + + return error; +} + /* * Get locations and (maybe) other attributes of a referral. * Note that we'll actually follow the referral later when * we detect fsid mismatch in inode revalidation */ -static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) +static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, struct nfs_fattr *fattr, + struct nfs_fh *fhandle) { int status = -ENOMEM; struct page *page = NULL; @@ -2159,20 +3055,26 @@ static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct if (locations == NULL) goto out; - status = nfs4_proc_fs_locations(dir, name, locations, page); + status = nfs4_proc_fs_locations(client, dir, name, locations, page); if (status != 0) goto out; - /* Make sure server returned a different fsid for the referral */ + + /* + * If the fsid didn't change, this is a migration event, not a + * referral. Cause us to drop into the exception handler, which + * will kick off migration recovery. + */ if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { - dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); - status = -EIO; + dprintk("%s: server did not return a different fsid for" + " a referral at %s\n", __func__, name->name); + status = -NFS4ERR_MOVED; goto out; } + /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ + nfs_fixup_referral_attributes(&locations->fattr); + /* replace the lookup nfs_fattr with the locations nfs_fattr */ memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); - fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; - if (!fattr->mode) - fattr->mode = S_IFDIR; memset(fhandle, 0, sizeof(struct nfs_fh)); out: if (page) @@ -2181,7 +3083,8 @@ out: return status; } -static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) +static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs4_getattr_arg args = { .fh = fhandle, @@ -2189,6 +3092,7 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, }; struct nfs4_getattr_res res = { .fattr = fattr, + .label = label, .server = server, }; struct rpc_message msg = { @@ -2196,18 +3100,22 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_argp = &args, .rpc_resp = &res, }; - + + args.bitmask = nfs4_bitmask(server, label); + nfs_fattr_init(fattr); - return nfs4_call_sync(server, &msg, &args, &res, 0); + return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } -static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) +static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(server, - _nfs4_proc_getattr(server, fhandle, fattr), + err = _nfs4_proc_getattr(server, fhandle, fattr, label); + trace_nfs4_getattr(server, fhandle, fattr, err); + err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); return err; @@ -2237,10 +3145,22 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, struct inode *inode = dentry->d_inode; struct rpc_cred *cred = NULL; struct nfs4_state *state = NULL; + struct nfs4_label *label = NULL; int status; + if (pnfs_ld_layoutret_on_setattr(inode)) + pnfs_commit_and_return_layout(inode); + nfs_fattr_init(fattr); + /* Deal with open(O_TRUNC) */ + if (sattr->ia_valid & ATTR_OPEN) + sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); + + /* Optimization: if the end result is no change, don't RPC */ + if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) + return 0; + /* Search for an existing open(O_WRITE) file */ if (sattr->ia_valid & ATTR_FILE) { struct nfs_open_context *ctx; @@ -2252,25 +3172,34 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, } } - status = nfs4_do_setattr(inode, cred, fattr, sattr, state); - if (status == 0) + label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); + if (IS_ERR(label)) + return PTR_ERR(label); + + status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); + if (status == 0) { nfs_setattr_update_inode(inode, sattr); + nfs_setsecurity(inode, fattr, label); + } + nfs4_label_free(label); return status; } -static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, +static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, - struct nfs_fattr *fattr) + struct nfs_fattr *fattr, struct nfs4_label *label) { + struct nfs_server *server = NFS_SERVER(dir); int status; struct nfs4_lookup_arg args = { .bitmask = server->attr_bitmask, - .dir_fh = dirfh, + .dir_fh = NFS_FH(dir), .name = name, }; struct nfs4_lookup_res res = { .server = server, .fattr = fattr, + .label = label, .fh = fhandle, }; struct rpc_message msg = { @@ -2279,55 +3208,91 @@ static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *d .rpc_resp = &res, }; + args.bitmask = nfs4_bitmask(server, label); + nfs_fattr_init(fattr); - dprintk("NFS call lookupfh %s\n", name->name); - status = nfs4_call_sync(server, &msg, &args, &res, 0); - dprintk("NFS reply lookupfh: %d\n", status); + dprintk("NFS call lookup %s\n", name->name); + status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); + dprintk("NFS reply lookup: %d\n", status); return status; } -static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, - struct qstr *name, struct nfs_fh *fhandle, - struct nfs_fattr *fattr) +static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) +{ + fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | + NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; + fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; + fattr->nlink = 2; +} + +static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, + struct qstr *name, struct nfs_fh *fhandle, + struct nfs_fattr *fattr, struct nfs4_label *label) { struct nfs4_exception exception = { }; + struct rpc_clnt *client = *clnt; int err; do { - err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); - /* FIXME: !!!! */ - if (err == -NFS4ERR_MOVED) { - err = -EREMOTE; + err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); + trace_nfs4_lookup(dir, name, err); + switch (err) { + case -NFS4ERR_BADNAME: + err = -ENOENT; + goto out; + case -NFS4ERR_MOVED: + err = nfs4_get_referral(client, dir, name, fattr, fhandle); + goto out; + case -NFS4ERR_WRONGSEC: + err = -EPERM; + if (client != *clnt) + goto out; + client = nfs4_negotiate_security(client, dir, name); + if (IS_ERR(client)) + return PTR_ERR(client); + + exception.retry = 1; break; + default: + err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); } - err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); + +out: + if (err == 0) + *clnt = client; + else if (client != *clnt) + rpc_shutdown_client(client); + return err; } -static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, - struct nfs_fh *fhandle, struct nfs_fattr *fattr) +static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, + struct nfs_fh *fhandle, struct nfs_fattr *fattr, + struct nfs4_label *label) { int status; - - dprintk("NFS call lookup %s\n", name->name); - status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); - if (status == -NFS4ERR_MOVED) - status = nfs4_get_referral(dir, name, fattr, fhandle); - dprintk("NFS reply lookup: %d\n", status); + struct rpc_clnt *client = NFS_CLIENT(dir); + + status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); + if (client != NFS_CLIENT(dir)) { + rpc_shutdown_client(client); + nfs_fixup_secinfo_attributes(fattr); + } return status; } -static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) +struct rpc_clnt * +nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, + struct nfs_fh *fhandle, struct nfs_fattr *fattr) { - struct nfs4_exception exception = { }; - int err; - do { - err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_lookup(dir, name, fhandle, fattr), - &exception); - } while (exception.retry); - return err; + struct rpc_clnt *client = NFS_CLIENT(dir); + int status; + + status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); + if (status < 0) + return ERR_PTR(status); + return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; } static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) @@ -2335,7 +3300,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry struct nfs_server *server = NFS_SERVER(inode); struct nfs4_accessargs args = { .fh = NFS_FH(inode), - .bitmask = server->attr_bitmask, + .bitmask = server->cache_consistency_bitmask, }; struct nfs4_accessres res = { .server = server, @@ -2347,7 +3312,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry .rpc_cred = entry->cred, }; int mode = entry->mask; - int status; + int status = 0; /* * Determine which access bits we want to ask for... @@ -2370,15 +3335,9 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry if (res.fattr == NULL) return -ENOMEM; - status = nfs4_call_sync(server, &msg, &args, &res, 0); + status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (!status) { - entry->mask = 0; - if (res.access & NFS4_ACCESS_READ) - entry->mask |= MAY_READ; - if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) - entry->mask |= MAY_WRITE; - if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) - entry->mask |= MAY_EXEC; + nfs_access_set_mask(entry, res.access); nfs_refresh_inode(inode, res.fattr); } nfs_free_fattr(res.fattr); @@ -2390,8 +3349,9 @@ static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(NFS_SERVER(inode), - _nfs4_proc_access(inode, entry), + err = _nfs4_proc_access(inode, entry); + trace_nfs4_access(inode, err); + err = nfs4_handle_exception(NFS_SERVER(inode), err, &exception); } while (exception.retry); return err; @@ -2414,9 +3374,7 @@ static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) * * In the case of WRITE, we also want to put the GETATTR after * the operation -- in this case because we want to make sure - * we get the post-operation mtime and size. This means that - * we can't use xdr_encode_pages() as written: we need a variant - * of it which would leave room in the 'tail' iovec. + * we get the post-operation mtime and size. * * Both of these changes to the XDR layer would in fact be quite * minor, but I decided to leave them for a subsequent patch. @@ -2437,7 +3395,7 @@ static int _nfs4_proc_readlink(struct inode *inode, struct page *page, .rpc_resp = &res, }; - return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); + return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); } static int nfs4_proc_readlink(struct inode *inode, struct page *page, @@ -2446,59 +3404,42 @@ static int nfs4_proc_readlink(struct inode *inode, struct page *page, struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(NFS_SERVER(inode), - _nfs4_proc_readlink(inode, page, pgbase, pglen), + err = _nfs4_proc_readlink(inode, page, pgbase, pglen); + trace_nfs4_readlink(inode, err); + err = nfs4_handle_exception(NFS_SERVER(inode), err, &exception); } while (exception.retry); return err; } /* - * Got race? - * We will need to arrange for the VFS layer to provide an atomic open. - * Until then, this create/open method is prone to inefficiency and race - * conditions due to the lookup, create, and open VFS calls from sys_open() - * placed on the wire. - * - * Given the above sorry state of affairs, I'm simply sending an OPEN. - * The file will be opened again in the subsequent VFS open call - * (nfs4_proc_file_open). - * - * The open for read will just hang around to be used by any process that - * opens the file O_RDONLY. This will all be resolved with the VFS changes. + * This is just for mknod. open(O_CREAT) will always do ->open_context(). */ - static int nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags, struct nfs_open_context *ctx) + int flags) { - struct path my_path = { - .dentry = dentry, - }; - struct path *path = &my_path; + struct nfs4_label l, *ilabel = NULL; + struct nfs_open_context *ctx; struct nfs4_state *state; - struct rpc_cred *cred = NULL; - fmode_t fmode = 0; + int opened = 0; int status = 0; - if (ctx != NULL) { - cred = ctx->cred; - path = &ctx->path; - fmode = ctx->mode; - } - state = nfs4_do_open(dir, path, fmode, flags, sattr, cred); - d_drop(dentry); + ctx = alloc_nfs_open_context(dentry, FMODE_READ); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); + + sattr->ia_mode &= ~current_umask(); + state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened); if (IS_ERR(state)) { status = PTR_ERR(state); goto out; } - d_add(dentry, igrab(state->inode)); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); - if (ctx != NULL) - ctx->state = state; - else - nfs4_close_sync(path, state, fmode); out: + nfs4_label_release_security(ilabel); + put_nfs_open_context(ctx); return status; } @@ -2507,9 +3448,7 @@ static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) struct nfs_server *server = NFS_SERVER(dir); struct nfs_removeargs args = { .fh = NFS_FH(dir), - .name.len = name->len, - .name.name = name->name, - .bitmask = server->attr_bitmask, + .name = *name, }; struct nfs_removeres res = { .server = server, @@ -2519,19 +3458,11 @@ static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) .rpc_argp = &args, .rpc_resp = &res, }; - int status = -ENOMEM; - - res.dir_attr = nfs_alloc_fattr(); - if (res.dir_attr == NULL) - goto out; + int status; - status = nfs4_call_sync(server, &msg, &args, &res, 1); - if (status == 0) { + status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); + if (status == 0) update_changeattr(dir, &res.cinfo); - nfs_post_op_update_inode(dir, res.dir_attr); - } - nfs_free_fattr(res.dir_attr); -out: return status; } @@ -2540,8 +3471,9 @@ static int nfs4_proc_remove(struct inode *dir, struct qstr *name) struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_remove(dir, name), + err = _nfs4_proc_remove(dir, name); + trace_nfs4_remove(dir, name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); } while (exception.retry); return err; @@ -2553,22 +3485,31 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) struct nfs_removeargs *args = msg->rpc_argp; struct nfs_removeres *res = msg->rpc_resp; - args->bitmask = server->cache_consistency_bitmask; res->server = server; - res->seq_res.sr_slot = NULL; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; + nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); + + nfs_fattr_init(res->dir_attr); +} + +static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) +{ + nfs4_setup_sequence(NFS_SERVER(data->dir), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) { - struct nfs_removeres *res = task->tk_msg.rpc_resp; + struct nfs_unlinkdata *data = task->tk_calldata; + struct nfs_removeres *res = &data->res; if (!nfs4_sequence_done(task, &res->seq_res)) return 0; if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) return 0; update_changeattr(dir, &res->cinfo); - nfs_post_op_update_inode(dir, res->dir_attr); return 1; } @@ -2579,14 +3520,23 @@ static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) struct nfs_renameres *res = msg->rpc_resp; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; - arg->bitmask = server->attr_bitmask; res->server = server; + nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); +} + +static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) +{ + nfs4_setup_sequence(NFS_SERVER(data->old_dir), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) { - struct nfs_renameres *res = task->tk_msg.rpc_resp; + struct nfs_renamedata *data = task->tk_calldata; + struct nfs_renameres *res = &data->res; if (!nfs4_sequence_done(task, &res->seq_res)) return 0; @@ -2594,65 +3544,10 @@ static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, return 0; update_changeattr(old_dir, &res->old_cinfo); - nfs_post_op_update_inode(old_dir, res->old_fattr); update_changeattr(new_dir, &res->new_cinfo); - nfs_post_op_update_inode(new_dir, res->new_fattr); return 1; } -static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, - struct inode *new_dir, struct qstr *new_name) -{ - struct nfs_server *server = NFS_SERVER(old_dir); - struct nfs_renameargs arg = { - .old_dir = NFS_FH(old_dir), - .new_dir = NFS_FH(new_dir), - .old_name = old_name, - .new_name = new_name, - .bitmask = server->attr_bitmask, - }; - struct nfs_renameres res = { - .server = server, - }; - struct rpc_message msg = { - .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], - .rpc_argp = &arg, - .rpc_resp = &res, - }; - int status = -ENOMEM; - - res.old_fattr = nfs_alloc_fattr(); - res.new_fattr = nfs_alloc_fattr(); - if (res.old_fattr == NULL || res.new_fattr == NULL) - goto out; - - status = nfs4_call_sync(server, &msg, &arg, &res, 1); - if (!status) { - update_changeattr(old_dir, &res.old_cinfo); - nfs_post_op_update_inode(old_dir, res.old_fattr); - update_changeattr(new_dir, &res.new_cinfo); - nfs_post_op_update_inode(new_dir, res.new_fattr); - } -out: - nfs_free_fattr(res.new_fattr); - nfs_free_fattr(res.old_fattr); - return status; -} - -static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, - struct inode *new_dir, struct qstr *new_name) -{ - struct nfs4_exception exception = { }; - int err; - do { - err = nfs4_handle_exception(NFS_SERVER(old_dir), - _nfs4_proc_rename(old_dir, old_name, - new_dir, new_name), - &exception); - } while (exception.retry); - return err; -} - static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs_server *server = NFS_SERVER(inode); @@ -2664,6 +3559,7 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr * }; struct nfs4_link_res res = { .server = server, + .label = NULL, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], @@ -2673,18 +3569,28 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr * int status = -ENOMEM; res.fattr = nfs_alloc_fattr(); - res.dir_attr = nfs_alloc_fattr(); - if (res.fattr == NULL || res.dir_attr == NULL) + if (res.fattr == NULL) goto out; - status = nfs4_call_sync(server, &msg, &arg, &res, 1); + res.label = nfs4_label_alloc(server, GFP_KERNEL); + if (IS_ERR(res.label)) { + status = PTR_ERR(res.label); + goto out; + } + arg.bitmask = nfs4_bitmask(server, res.label); + + status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); if (!status) { update_changeattr(dir, &res.cinfo); - nfs_post_op_update_inode(dir, res.dir_attr); - nfs_post_op_update_inode(inode, res.fattr); + status = nfs_post_op_update_inode(inode, res.fattr); + if (!status) + nfs_setsecurity(inode, res.fattr, res.label); } + + + nfs4_label_free(res.label); + out: - nfs_free_fattr(res.dir_attr); nfs_free_fattr(res.fattr); return status; } @@ -2707,7 +3613,7 @@ struct nfs4_createdata { struct nfs4_create_res res; struct nfs_fh fh; struct nfs_fattr fattr; - struct nfs_fattr dir_fattr; + struct nfs4_label *label; }; static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, @@ -2719,6 +3625,10 @@ static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, if (data != NULL) { struct nfs_server *server = NFS_SERVER(dir); + data->label = nfs4_label_alloc(server, GFP_KERNEL); + if (IS_ERR(data->label)) + goto out_free; + data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; data->msg.rpc_argp = &data->arg; data->msg.rpc_resp = &data->res; @@ -2727,36 +3637,39 @@ static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, data->arg.name = name; data->arg.attrs = sattr; data->arg.ftype = ftype; - data->arg.bitmask = server->attr_bitmask; + data->arg.bitmask = nfs4_bitmask(server, data->label); data->res.server = server; data->res.fh = &data->fh; data->res.fattr = &data->fattr; - data->res.dir_fattr = &data->dir_fattr; + data->res.label = data->label; nfs_fattr_init(data->res.fattr); - nfs_fattr_init(data->res.dir_fattr); } return data; +out_free: + kfree(data); + return NULL; } static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) { - int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, - &data->arg, &data->res, 1); + int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, + &data->arg.seq_args, &data->res.seq_res, 1); if (status == 0) { update_changeattr(dir, &data->res.dir_cinfo); - nfs_post_op_update_inode(dir, data->res.dir_fattr); - status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); + status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); } return status; } static void nfs4_free_createdata(struct nfs4_createdata *data) { + nfs4_label_free(data->label); kfree(data); } static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, - struct page *page, unsigned int len, struct iattr *sattr) + struct page *page, unsigned int len, struct iattr *sattr, + struct nfs4_label *label) { struct nfs4_createdata *data; int status = -ENAMETOOLONG; @@ -2772,6 +3685,7 @@ static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; data->arg.u.symlink.pages = &page; data->arg.u.symlink.len = len; + data->arg.label = label; status = nfs4_do_create(dir, dentry, data); @@ -2784,18 +3698,24 @@ static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, unsigned int len, struct iattr *sattr) { struct nfs4_exception exception = { }; + struct nfs4_label l, *label = NULL; int err; + + label = nfs4_label_init_security(dir, dentry, sattr, &l); + do { - err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_symlink(dir, dentry, page, - len, sattr), + err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); + trace_nfs4_symlink(dir, &dentry->d_name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); } while (exception.retry); + + nfs4_label_release_security(label); return err; } static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, - struct iattr *sattr) + struct iattr *sattr, struct nfs4_label *label) { struct nfs4_createdata *data; int status = -ENOMEM; @@ -2804,6 +3724,7 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, if (data == NULL) goto out; + data->arg.label = label; status = nfs4_do_create(dir, dentry, data); nfs4_free_createdata(data); @@ -2815,12 +3736,20 @@ static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { struct nfs4_exception exception = { }; + struct nfs4_label l, *label = NULL; int err; + + label = nfs4_label_init_security(dir, dentry, sattr, &l); + + sattr->ia_mode &= ~current_umask(); do { - err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_mkdir(dir, dentry, sattr), + err = _nfs4_proc_mkdir(dir, dentry, sattr, label); + trace_nfs4_mkdir(dir, &dentry->d_name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); } while (exception.retry); + nfs4_label_release_security(label); + return err; } @@ -2845,15 +3774,16 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, }; int status; - dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, - dentry->d_parent->d_name.name, - dentry->d_name.name, + dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, + dentry, (unsigned long long)cookie); - nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); + nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); res.pgbase = args.pgbase; - status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); - if (status == 0) - memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); + status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); + if (status >= 0) { + memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); + status += args.pgbase; + } nfs_invalidate_atime(dir); @@ -2867,24 +3797,22 @@ static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), - _nfs4_proc_readdir(dentry, cred, cookie, - pages, count, plus), + err = _nfs4_proc_readdir(dentry, cred, cookie, + pages, count, plus); + trace_nfs4_readdir(dentry->d_inode, err); + err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err, &exception); } while (exception.retry); return err; } static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, - struct iattr *sattr, dev_t rdev) + struct iattr *sattr, struct nfs4_label *label, dev_t rdev) { struct nfs4_createdata *data; int mode = sattr->ia_mode; int status = -ENOMEM; - BUG_ON(!(sattr->ia_valid & ATTR_MODE)); - BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); - data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); if (data == NULL) goto out; @@ -2900,10 +3828,14 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, data->arg.ftype = NF4CHR; data->arg.u.device.specdata1 = MAJOR(rdev); data->arg.u.device.specdata2 = MINOR(rdev); + } else if (!S_ISSOCK(mode)) { + status = -EINVAL; + goto out_free; } - - status = nfs4_do_create(dir, dentry, data); + data->arg.label = label; + status = nfs4_do_create(dir, dentry, data); +out_free: nfs4_free_createdata(data); out: return status; @@ -2913,12 +3845,21 @@ static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { struct nfs4_exception exception = { }; + struct nfs4_label l, *label = NULL; int err; + + label = nfs4_label_init_security(dir, dentry, sattr, &l); + + sattr->ia_mode &= ~current_umask(); do { - err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_mknod(dir, dentry, sattr, rdev), + err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); + trace_nfs4_mknod(dir, &dentry->d_name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); } while (exception.retry); + + nfs4_label_release_security(label); + return err; } @@ -2939,7 +3880,7 @@ static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, }; nfs_fattr_init(fsstat->fattr); - return nfs4_call_sync(server, &msg, &args, &res, 0); + return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) @@ -2970,26 +3911,45 @@ static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = &res, }; - return nfs4_call_sync(server, &msg, &args, &res, 0); + return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) { struct nfs4_exception exception = { }; + unsigned long now = jiffies; int err; do { - err = nfs4_handle_exception(server, - _nfs4_do_fsinfo(server, fhandle, fsinfo), - &exception); + err = _nfs4_do_fsinfo(server, fhandle, fsinfo); + trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); + if (err == 0) { + struct nfs_client *clp = server->nfs_client; + + spin_lock(&clp->cl_lock); + clp->cl_lease_time = fsinfo->lease_time * HZ; + clp->cl_last_renewal = now; + spin_unlock(&clp->cl_lock); + break; + } + err = nfs4_handle_exception(server, err, &exception); } while (exception.retry); return err; } static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) { + int error; + nfs_fattr_init(fsinfo->fattr); - return nfs4_do_fsinfo(server, fhandle, fsinfo); + error = nfs4_do_fsinfo(server, fhandle, fsinfo); + if (error == 0) { + /* block layout checks this! */ + server->pnfs_blksize = fsinfo->blksize; + set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); + } + + return error; } static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, @@ -3015,7 +3975,7 @@ static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle } nfs_fattr_init(pathconf->fattr); - return nfs4_call_sync(server, &msg, &args, &res, 0); + return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, @@ -3032,83 +3992,227 @@ static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return err; } -static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) +int nfs4_set_rw_stateid(nfs4_stateid *stateid, + const struct nfs_open_context *ctx, + const struct nfs_lock_context *l_ctx, + fmode_t fmode) { - struct nfs_server *server = NFS_SERVER(data->inode); + const struct nfs_lockowner *lockowner = NULL; - dprintk("--> %s\n", __func__); + if (l_ctx != NULL) + lockowner = &l_ctx->lockowner; + return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner); +} +EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); - if (!nfs4_sequence_done(task, &data->res.seq_res)) - return -EAGAIN; +static bool nfs4_stateid_is_current(nfs4_stateid *stateid, + const struct nfs_open_context *ctx, + const struct nfs_lock_context *l_ctx, + fmode_t fmode) +{ + nfs4_stateid current_stateid; + + /* If the current stateid represents a lost lock, then exit */ + if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) + return true; + return nfs4_stateid_match(stateid, ¤t_stateid); +} + +static bool nfs4_error_stateid_expired(int err) +{ + switch (err) { + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_OLD_STATEID: + case -NFS4ERR_OPENMODE: + case -NFS4ERR_EXPIRED: + return true; + } + return false; +} + +void __nfs4_read_done_cb(struct nfs_pgio_data *data) +{ + nfs_invalidate_atime(data->header->inode); +} + +static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_data *data) +{ + struct nfs_server *server = NFS_SERVER(data->header->inode); + trace_nfs4_read(data, task->tk_status); if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { - nfs_restart_rpc(task, server->nfs_client); + rpc_restart_call_prepare(task); return -EAGAIN; } - nfs_invalidate_atime(data->inode); + __nfs4_read_done_cb(data); if (task->tk_status > 0) renew_lease(server, data->timestamp); return 0; } -static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) +static bool nfs4_read_stateid_changed(struct rpc_task *task, + struct nfs_pgio_args *args) { - data->timestamp = jiffies; - msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; + + if (!nfs4_error_stateid_expired(task->tk_status) || + nfs4_stateid_is_current(&args->stateid, + args->context, + args->lock_context, + FMODE_READ)) + return false; + rpc_restart_call_prepare(task); + return true; } -static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) +static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_data *data) { - struct inode *inode = data->inode; - + + dprintk("--> %s\n", __func__); + if (!nfs4_sequence_done(task, &data->res.seq_res)) return -EAGAIN; + if (nfs4_read_stateid_changed(task, &data->args)) + return -EAGAIN; + return data->pgio_done_cb ? data->pgio_done_cb(task, data) : + nfs4_read_done_cb(task, data); +} + +static void nfs4_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg) +{ + data->timestamp = jiffies; + data->pgio_done_cb = nfs4_read_done_cb; + msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); +} +static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data) +{ + if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), + &data->args.seq_args, + &data->res.seq_res, + task)) + return 0; + if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context, + data->args.lock_context, data->header->rw_ops->rw_mode) == -EIO) + return -EIO; + if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags))) + return -EIO; + return 0; +} + +static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_pgio_data *data) +{ + struct inode *inode = data->header->inode; + + trace_nfs4_write(data, task->tk_status); if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { - nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); + rpc_restart_call_prepare(task); return -EAGAIN; } if (task->tk_status >= 0) { renew_lease(NFS_SERVER(inode), data->timestamp); - nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); + nfs_post_op_update_inode_force_wcc(inode, &data->fattr); } return 0; } -static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) +static bool nfs4_write_stateid_changed(struct rpc_task *task, + struct nfs_pgio_args *args) { - struct nfs_server *server = NFS_SERVER(data->inode); - data->args.bitmask = server->cache_consistency_bitmask; + if (!nfs4_error_stateid_expired(task->tk_status) || + nfs4_stateid_is_current(&args->stateid, + args->context, + args->lock_context, + FMODE_WRITE)) + return false; + rpc_restart_call_prepare(task); + return true; +} + +static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_data *data) +{ + if (!nfs4_sequence_done(task, &data->res.seq_res)) + return -EAGAIN; + if (nfs4_write_stateid_changed(task, &data->args)) + return -EAGAIN; + return data->pgio_done_cb ? data->pgio_done_cb(task, data) : + nfs4_write_done_cb(task, data); +} + +static +bool nfs4_write_need_cache_consistency_data(const struct nfs_pgio_data *data) +{ + const struct nfs_pgio_header *hdr = data->header; + + /* Don't request attributes for pNFS or O_DIRECT writes */ + if (data->ds_clp != NULL || hdr->dreq != NULL) + return false; + /* Otherwise, request attributes if and only if we don't hold + * a delegation + */ + return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; +} + +static void nfs4_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg) +{ + struct nfs_server *server = NFS_SERVER(data->header->inode); + + if (!nfs4_write_need_cache_consistency_data(data)) { + data->args.bitmask = NULL; + data->res.fattr = NULL; + } else + data->args.bitmask = server->cache_consistency_bitmask; + + if (!data->pgio_done_cb) + data->pgio_done_cb = nfs4_write_done_cb; data->res.server = server; data->timestamp = jiffies; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); +} + +static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) +{ + nfs4_setup_sequence(NFS_SERVER(data->inode), + &data->args.seq_args, + &data->res.seq_res, + task); } -static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) +static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) { struct inode *inode = data->inode; - - if (!nfs4_sequence_done(task, &data->res.seq_res)) - return -EAGAIN; + trace_nfs4_commit(data, task->tk_status); if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { - nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); + rpc_restart_call_prepare(task); return -EAGAIN; } - nfs_refresh_inode(inode, data->res.fattr); return 0; } -static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) +static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) +{ + if (!nfs4_sequence_done(task, &data->res.seq_res)) + return -EAGAIN; + return data->commit_done_cb(task, data); +} + +static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) { struct nfs_server *server = NFS_SERVER(data->inode); - - data->args.bitmask = server->cache_consistency_bitmask; + + if (data->commit_done_cb == NULL) + data->commit_done_cb = nfs4_commit_done_cb; data->res.server = server; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); } struct nfs4_renewdata { @@ -3137,11 +4241,22 @@ static void nfs4_renew_done(struct rpc_task *task, void *calldata) struct nfs_client *clp = data->client; unsigned long timestamp = data->timestamp; - if (task->tk_status < 0) { + trace_nfs4_renew_async(clp, task->tk_status); + switch (task->tk_status) { + case 0: + break; + case -NFS4ERR_LEASE_MOVED: + nfs4_schedule_lease_moved_recovery(clp); + break; + default: /* Unless we're shutting down, schedule state recovery! */ - if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) - nfs4_schedule_state_recovery(clp); - return; + if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) + return; + if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { + nfs4_schedule_lease_recovery(clp); + return; + } + nfs4_schedule_path_down_recovery(clp); } do_renew_lease(clp, timestamp); } @@ -3151,7 +4266,7 @@ static const struct rpc_call_ops nfs4_renew_ops = { .rpc_release = nfs4_renew_release, }; -int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) +static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], @@ -3160,18 +4275,20 @@ int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) }; struct nfs4_renewdata *data; + if (renew_flags == 0) + return 0; if (!atomic_inc_not_zero(&clp->cl_count)) return -EIO; - data = kmalloc(sizeof(*data), GFP_KERNEL); + data = kmalloc(sizeof(*data), GFP_NOFS); if (data == NULL) return -ENOMEM; data->client = clp; data->timestamp = jiffies; - return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, + return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, &nfs4_renew_ops, data); } -int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) +static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) { struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], @@ -3181,7 +4298,7 @@ int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) unsigned long now = jiffies; int status; - status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); if (status < 0) return status; do_renew_lease(clp, now); @@ -3190,28 +4307,42 @@ int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) static inline int nfs4_server_supports_acls(struct nfs_server *server) { - return (server->caps & NFS_CAP_ACLS) - && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) - && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); + return server->caps & NFS_CAP_ACLS; } -/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that - * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on +/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that + * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on * the stack. */ -#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) +#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) -static void buf_to_pages(const void *buf, size_t buflen, +static int buf_to_pages_noslab(const void *buf, size_t buflen, struct page **pages, unsigned int *pgbase) { - const void *p = buf; + struct page *newpage, **spages; + int rc = 0; + size_t len; + spages = pages; - *pgbase = offset_in_page(buf); - p -= *pgbase; - while (p < buf + buflen) { - *(pages++) = virt_to_page(p); - p += PAGE_CACHE_SIZE; - } + do { + len = min_t(size_t, PAGE_SIZE, buflen); + newpage = alloc_page(GFP_KERNEL); + + if (newpage == NULL) + goto unwind; + memcpy(page_address(newpage), buf, len); + buf += len; + buflen -= len; + *pages++ = newpage; + rc++; + } while (buflen != 0); + + return rc; + +unwind: + for(; rc > 0; rc--) + __free_page(spages[rc-1]); + return -ENOMEM; } struct nfs4_cached_acl { @@ -3260,16 +4391,17 @@ out: return ret; } -static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) +static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) { struct nfs4_cached_acl *acl; + size_t buflen = sizeof(*acl) + acl_len; - if (buf && acl_len <= PAGE_SIZE) { - acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); + if (buflen <= PAGE_SIZE) { + acl = kmalloc(buflen, GFP_KERNEL); if (acl == NULL) goto out; acl->cached = 1; - memcpy(acl->data, buf, acl_len); + _copy_from_pages(acl->data, pages, pgbase, acl_len); } else { acl = kmalloc(sizeof(*acl), GFP_KERNEL); if (acl == NULL) @@ -3281,9 +4413,19 @@ out: nfs4_set_cached_acl(inode, acl); } +/* + * The getxattr API returns the required buffer length when called with a + * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating + * the required buf. On a NULL buf, we send a page of data to the server + * guessing that the ACL request can be serviced by a page. If so, we cache + * up to the page of ACL data, and the 2nd call to getxattr is serviced by + * the cache. If not so, we throw away the page, and cache the required + * length. The next getxattr call will then produce another round trip to + * the server, this time with the input buf of the required size. + */ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) { - struct page *pages[NFS4ACL_MAXPAGES]; + struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; struct nfs_getaclargs args = { .fh = NFS_FH(inode), .acl_pages = pages, @@ -3292,47 +4434,66 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu struct nfs_getaclres res = { .acl_len = buflen, }; - void *resp_buf; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], .rpc_argp = &args, .rpc_resp = &res, }; - struct page *localpage = NULL; - int ret; + unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); + int ret = -ENOMEM, i; + + /* As long as we're doing a round trip to the server anyway, + * let's be prepared for a page of acl data. */ + if (npages == 0) + npages = 1; + if (npages > ARRAY_SIZE(pages)) + return -ERANGE; - if (buflen < PAGE_SIZE) { - /* As long as we're doing a round trip to the server anyway, - * let's be prepared for a page of acl data. */ - localpage = alloc_page(GFP_KERNEL); - resp_buf = page_address(localpage); - if (localpage == NULL) - return -ENOMEM; - args.acl_pages[0] = localpage; - args.acl_pgbase = 0; - args.acl_len = PAGE_SIZE; - } else { - resp_buf = buf; - buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); + for (i = 0; i < npages; i++) { + pages[i] = alloc_page(GFP_KERNEL); + if (!pages[i]) + goto out_free; } - ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); + + /* for decoding across pages */ + res.acl_scratch = alloc_page(GFP_KERNEL); + if (!res.acl_scratch) + goto out_free; + + args.acl_len = npages * PAGE_SIZE; + args.acl_pgbase = 0; + + dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", + __func__, buf, buflen, npages, args.acl_len); + ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), + &msg, &args.seq_args, &res.seq_res, 0); if (ret) goto out_free; - if (res.acl_len > args.acl_len) - nfs4_write_cached_acl(inode, NULL, res.acl_len); - else - nfs4_write_cached_acl(inode, resp_buf, res.acl_len); - if (buf) { + + /* Handle the case where the passed-in buffer is too short */ + if (res.acl_flags & NFS4_ACL_TRUNC) { + /* Did the user only issue a request for the acl length? */ + if (buf == NULL) + goto out_ok; ret = -ERANGE; - if (res.acl_len > buflen) + goto out_free; + } + nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); + if (buf) { + if (res.acl_len > buflen) { + ret = -ERANGE; goto out_free; - if (localpage) - memcpy(buf, resp_buf, res.acl_len); + } + _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); } +out_ok: ret = res.acl_len; out_free: - if (localpage) - __free_page(localpage); + for (i = 0; i < npages; i++) + if (pages[i]) + __free_page(pages[i]); + if (res.acl_scratch) + __free_page(res.acl_scratch); return ret; } @@ -3342,6 +4503,7 @@ static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bufl ssize_t ret; do { ret = __nfs4_get_acl_uncached(inode, buf, buflen); + trace_nfs4_get_acl(inode, ret); if (ret >= 0) break; ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); @@ -3359,8 +4521,12 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) ret = nfs_revalidate_inode(server, inode); if (ret < 0) return ret; + if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) + nfs_zap_acl_cache(inode); ret = nfs4_read_cached_acl(inode, buf, buflen); if (ret != -ENOENT) + /* -ENOENT is returned if there is no ACL or if there is an ACL + * but no cached acl data, just the acl length */ return ret; return nfs4_get_acl_uncached(inode, buf, buflen); } @@ -3380,13 +4546,33 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl .rpc_argp = &arg, .rpc_resp = &res, }; - int ret; + unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); + int ret, i; if (!nfs4_server_supports_acls(server)) return -EOPNOTSUPP; - nfs_inode_return_delegation(inode); - buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); - ret = nfs4_call_sync(server, &msg, &arg, &res, 1); + if (npages > ARRAY_SIZE(pages)) + return -ERANGE; + i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); + if (i < 0) + return i; + nfs4_inode_return_delegation(inode); + ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); + + /* + * Free each page after tx, so the only ref left is + * held by the network stack + */ + for (; i > 0; i--) + put_page(pages[i-1]); + + /* + * Acl update can result in inode attribute update. + * so mark the attribute cache invalid. + */ + spin_lock(&inode->i_lock); + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; + spin_unlock(&inode->i_lock); nfs_access_zap_cache(inode); nfs_zap_acl_cache(inode); return ret; @@ -3397,14 +4583,166 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen struct nfs4_exception exception = { }; int err; do { - err = nfs4_handle_exception(NFS_SERVER(inode), - __nfs4_proc_set_acl(inode, buf, buflen), + err = __nfs4_proc_set_acl(inode, buf, buflen); + trace_nfs4_set_acl(inode, err); + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + return err; +} + +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static int _nfs4_get_security_label(struct inode *inode, void *buf, + size_t buflen) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_fattr fattr; + struct nfs4_label label = {0, 0, buflen, buf}; + + u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; + struct nfs4_getattr_arg arg = { + .fh = NFS_FH(inode), + .bitmask = bitmask, + }; + struct nfs4_getattr_res res = { + .fattr = &fattr, + .label = &label, + .server = server, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int ret; + + nfs_fattr_init(&fattr); + + ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); + if (ret) + return ret; + if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) + return -ENOENT; + if (buflen < label.len) + return -ERANGE; + return 0; +} + +static int nfs4_get_security_label(struct inode *inode, void *buf, + size_t buflen) +{ + struct nfs4_exception exception = { }; + int err; + + if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) + return -EOPNOTSUPP; + + do { + err = _nfs4_get_security_label(inode, buf, buflen); + trace_nfs4_get_security_label(inode, err); + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + return err; +} + +static int _nfs4_do_set_security_label(struct inode *inode, + struct nfs4_label *ilabel, + struct nfs_fattr *fattr, + struct nfs4_label *olabel) +{ + + struct iattr sattr = {0}; + struct nfs_server *server = NFS_SERVER(inode); + const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; + struct nfs_setattrargs arg = { + .fh = NFS_FH(inode), + .iap = &sattr, + .server = server, + .bitmask = bitmask, + .label = ilabel, + }; + struct nfs_setattrres res = { + .fattr = fattr, + .label = olabel, + .server = server, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int status; + + nfs4_stateid_copy(&arg.stateid, &zero_stateid); + + status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); + if (status) + dprintk("%s failed: %d\n", __func__, status); + + return status; +} + +static int nfs4_do_set_security_label(struct inode *inode, + struct nfs4_label *ilabel, + struct nfs_fattr *fattr, + struct nfs4_label *olabel) +{ + struct nfs4_exception exception = { }; + int err; + + do { + err = _nfs4_do_set_security_label(inode, ilabel, + fattr, olabel); + trace_nfs4_set_security_label(inode, err); + err = nfs4_handle_exception(NFS_SERVER(inode), err, &exception); } while (exception.retry); return err; } static int +nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) +{ + struct nfs4_label ilabel, *olabel = NULL; + struct nfs_fattr fattr; + struct rpc_cred *cred; + struct inode *inode = dentry->d_inode; + int status; + + if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) + return -EOPNOTSUPP; + + nfs_fattr_init(&fattr); + + ilabel.pi = 0; + ilabel.lfs = 0; + ilabel.label = (char *)buf; + ilabel.len = buflen; + + cred = rpc_lookup_cred(); + if (IS_ERR(cred)) + return PTR_ERR(cred); + + olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); + if (IS_ERR(olabel)) { + status = -PTR_ERR(olabel); + goto out; + } + + status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); + if (status == 0) + nfs_setsecurity(inode, &fattr, olabel); + + nfs4_label_free(olabel); +out: + put_rpccred(cred); + return status; +} +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ + + +static int nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) { struct nfs_client *clp = server->nfs_client; @@ -3412,17 +4750,34 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, if (task->tk_status >= 0) return 0; switch(task->tk_status) { + case -NFS4ERR_DELEG_REVOKED: case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_BAD_STATEID: + if (state == NULL) + break; + nfs_remove_bad_delegation(state->inode); case -NFS4ERR_OPENMODE: if (state == NULL) break; - nfs4_state_mark_reclaim_nograce(clp, state); - goto do_state_recovery; + if (nfs4_schedule_stateid_recovery(server, state) < 0) + goto recovery_failed; + goto wait_on_recovery; + case -NFS4ERR_EXPIRED: + if (state != NULL) { + if (nfs4_schedule_stateid_recovery(server, state) < 0) + goto recovery_failed; + } case -NFS4ERR_STALE_STATEID: case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_EXPIRED: - goto do_state_recovery; + nfs4_schedule_lease_recovery(clp); + goto wait_on_recovery; + case -NFS4ERR_MOVED: + if (nfs4_schedule_migration_recovery(server) < 0) + goto recovery_failed; + goto wait_on_recovery; + case -NFS4ERR_LEASE_MOVED: + nfs4_schedule_lease_moved_recovery(clp); + goto wait_on_recovery; #if defined(CONFIG_NFS_V4_1) case -NFS4ERR_BADSESSION: case -NFS4ERR_BADSLOT: @@ -3433,32 +4788,109 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, case -NFS4ERR_SEQ_MISORDERED: dprintk("%s ERROR %d, Reset session\n", __func__, task->tk_status); - nfs4_schedule_state_recovery(clp); - task->tk_status = 0; - return -EAGAIN; + nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); + goto wait_on_recovery; #endif /* CONFIG_NFS_V4_1 */ case -NFS4ERR_DELAY: nfs_inc_server_stats(server, NFSIOS_DELAY); case -NFS4ERR_GRACE: - case -EKEYEXPIRED: rpc_delay(task, NFS4_POLL_RETRY_MAX); - task->tk_status = 0; - return -EAGAIN; + case -NFS4ERR_RETRY_UNCACHED_REP: case -NFS4ERR_OLD_STATEID: - task->tk_status = 0; - return -EAGAIN; + goto restart_call; } task->tk_status = nfs4_map_errors(task->tk_status); return 0; -do_state_recovery: +recovery_failed: + task->tk_status = -EIO; + return 0; +wait_on_recovery: rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); - nfs4_schedule_state_recovery(clp); if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); + if (test_bit(NFS_MIG_FAILED, &server->mig_status)) + goto recovery_failed; +restart_call: task->tk_status = 0; return -EAGAIN; } +static void nfs4_init_boot_verifier(const struct nfs_client *clp, + nfs4_verifier *bootverf) +{ + __be32 verf[2]; + + if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { + /* An impossible timestamp guarantees this value + * will never match a generated boot time. */ + verf[0] = 0; + verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); + } else { + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + verf[0] = cpu_to_be32(nn->boot_time.tv_sec); + verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); + } + memcpy(bootverf->data, verf, sizeof(bootverf->data)); +} + +static unsigned int +nfs4_init_nonuniform_client_string(const struct nfs_client *clp, + char *buf, size_t len) +{ + unsigned int result; + + rcu_read_lock(); + result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s", + clp->cl_ipaddr, + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_ADDR), + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_PROTO)); + rcu_read_unlock(); + return result; +} + +static unsigned int +nfs4_init_uniform_client_string(const struct nfs_client *clp, + char *buf, size_t len) +{ + const char *nodename = clp->cl_rpcclient->cl_nodename; + + if (nfs4_client_id_uniquifier[0] != '\0') + return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s", + clp->rpc_ops->version, + clp->cl_minorversion, + nfs4_client_id_uniquifier, + nodename); + return scnprintf(buf, len, "Linux NFSv%u.%u %s", + clp->rpc_ops->version, clp->cl_minorversion, + nodename); +} + +/* + * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback + * services. Advertise one based on the address family of the + * clientaddr. + */ +static unsigned int +nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) +{ + if (strchr(clp->cl_ipaddr, ':') != NULL) + return scnprintf(buf, len, "tcp6"); + else + return scnprintf(buf, len, "tcp"); +} + +/** + * nfs4_proc_setclientid - Negotiate client ID + * @clp: state data structure + * @program: RPC program for NFSv4 callback service + * @port: IP port number for NFS4 callback service + * @cred: RPC credential to use for this call + * @res: where to place the result + * + * Returns zero, a negative errno, or a negative NFS4ERR status code. + */ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred, struct nfs4_setclientid_res *res) @@ -3467,6 +4899,7 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, struct nfs4_setclientid setclientid = { .sc_verifier = &sc_verifier, .sc_prog = program, + .sc_cb_ident = clp->cl_cb_ident, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], @@ -3474,91 +4907,66 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, .rpc_resp = res, .rpc_cred = cred, }; - __be32 *p; - int loop = 0; int status; - p = (__be32*)sc_verifier.data; - *p++ = htonl((u32)clp->cl_boot_time.tv_sec); - *p = htonl((u32)clp->cl_boot_time.tv_nsec); - - for(;;) { - setclientid.sc_name_len = scnprintf(setclientid.sc_name, - sizeof(setclientid.sc_name), "%s/%s %s %s %u", - clp->cl_ipaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR), - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_PROTO), - clp->cl_rpcclient->cl_auth->au_ops->au_name, - clp->cl_id_uniquifier); - setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, - sizeof(setclientid.sc_netid), - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_NETID)); - setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, + /* nfs_client_id4 */ + nfs4_init_boot_verifier(clp, &sc_verifier); + if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) + setclientid.sc_name_len = + nfs4_init_uniform_client_string(clp, + setclientid.sc_name, + sizeof(setclientid.sc_name)); + else + setclientid.sc_name_len = + nfs4_init_nonuniform_client_string(clp, + setclientid.sc_name, + sizeof(setclientid.sc_name)); + /* cb_client4 */ + setclientid.sc_netid_len = + nfs4_init_callback_netid(clp, + setclientid.sc_netid, + sizeof(setclientid.sc_netid)); + setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, sizeof(setclientid.sc_uaddr), "%s.%u.%u", clp->cl_ipaddr, port >> 8, port & 255); - status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); - if (status != -NFS4ERR_CLID_INUSE) - break; - if (signalled()) - break; - if (loop++ & 1) - ssleep(clp->cl_lease_time + 1); - else - if (++clp->cl_id_uniquifier == 0) - break; - } + dprintk("NFS call setclientid auth=%s, '%.*s'\n", + clp->cl_rpcclient->cl_auth->au_ops->au_name, + setclientid.sc_name_len, setclientid.sc_name); + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_setclientid(clp, status); + dprintk("NFS reply setclientid: %d\n", status); return status; } -static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, +/** + * nfs4_proc_setclientid_confirm - Confirm client ID + * @clp: state data structure + * @res: result of a previous SETCLIENTID + * @cred: RPC credential to use for this call + * + * Returns zero, a negative errno, or a negative NFS4ERR status code. + */ +int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct nfs4_setclientid_res *arg, struct rpc_cred *cred) { - struct nfs_fsinfo fsinfo; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], .rpc_argp = arg, - .rpc_resp = &fsinfo, .rpc_cred = cred, }; - unsigned long now; int status; - now = jiffies; - status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); - if (status == 0) { - spin_lock(&clp->cl_lock); - clp->cl_lease_time = fsinfo.lease_time * HZ; - clp->cl_last_renewal = now; - spin_unlock(&clp->cl_lock); - } + dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", + clp->cl_rpcclient->cl_auth->au_ops->au_name, + clp->cl_clientid); + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_setclientid_confirm(clp, status); + dprintk("NFS reply setclientid_confirm: %d\n", status); return status; } -int nfs4_proc_setclientid_confirm(struct nfs_client *clp, - struct nfs4_setclientid_res *arg, - struct rpc_cred *cred) -{ - long timeout = 0; - int err; - do { - err = _nfs4_proc_setclientid_confirm(clp, arg, cred); - switch (err) { - case 0: - return err; - case -NFS4ERR_RESOURCE: - /* The IBM lawyers misread another document! */ - case -NFS4ERR_DELAY: - err = nfs4_delay(clp->cl_rpcclient, &timeout); - } - } while (err == 0); - return err; -} - struct nfs4_delegreturndata { struct nfs4_delegreturnargs args; struct nfs4_delegreturnres res; @@ -3576,16 +4984,23 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) if (!nfs4_sequence_done(task, &data->res.seq_res)) return; + trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); switch (task->tk_status) { - case -NFS4ERR_STALE_STATEID: - case -NFS4ERR_EXPIRED: case 0: renew_lease(data->res.server, data->timestamp); break; + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_OLD_STATEID: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_EXPIRED: + task->tk_status = 0; + break; default: if (nfs4_async_handle_error(task, data->res.server, NULL) == -EAGAIN) { - nfs_restart_rpc(task, data->res.server->nfs_client); + rpc_restart_call_prepare(task); return; } } @@ -3597,25 +5012,20 @@ static void nfs4_delegreturn_release(void *calldata) kfree(calldata); } -#if defined(CONFIG_NFS_V4_1) static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) { struct nfs4_delegreturndata *d_data; d_data = (struct nfs4_delegreturndata *)data; - if (nfs4_setup_sequence(d_data->res.server, - &d_data->args.seq_args, - &d_data->res.seq_res, 1, task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(d_data->res.server, + &d_data->args.seq_args, + &d_data->res.seq_res, + task); } -#endif /* CONFIG_NFS_V4_1 */ static const struct rpc_call_ops nfs4_delegreturn_ops = { -#if defined(CONFIG_NFS_V4_1) .rpc_call_prepare = nfs4_delegreturn_prepare, -#endif /* CONFIG_NFS_V4_1 */ .rpc_call_done = nfs4_delegreturn_done, .rpc_release = nfs4_delegreturn_release, }; @@ -3640,11 +5050,12 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co data = kzalloc(sizeof(*data), GFP_NOFS); if (data == NULL) return -ENOMEM; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); data->args.fhandle = &data->fh; data->args.stateid = &data->stateid; - data->args.bitmask = server->attr_bitmask; + data->args.bitmask = server->cache_consistency_bitmask; nfs_copy_fh(&data->fh, NFS_FH(inode)); - memcpy(&data->stateid, stateid, sizeof(data->stateid)); + nfs4_stateid_copy(&data->stateid, stateid); data->res.fattr = &data->fattr; data->res.server = server; nfs_fattr_init(data->res.fattr); @@ -3652,8 +5063,8 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co data->rpc_status = 0; task_setup_data.callback_data = data; - msg.rpc_argp = &data->args, - msg.rpc_resp = &data->res, + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -3663,9 +5074,10 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co if (status != 0) goto out; status = data->rpc_status; - if (status != 0) - goto out; - nfs_refresh_inode(inode, &data->fattr); + if (status == 0) + nfs_post_op_update_inode_force_wcc(inode, &data->fattr); + else + nfs_refresh_inode(inode, &data->fattr); out: rpc_put_task(task); return status; @@ -3678,6 +5090,7 @@ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4 int err; do { err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); + trace_nfs4_delegreturn(inode, err); switch (err) { case -NFS4ERR_STALE_STATEID: case -NFS4ERR_EXPIRED: @@ -3698,7 +5111,7 @@ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4 static unsigned long nfs4_set_lock_task_retry(unsigned long timeout) { - schedule_timeout_killable(timeout); + freezable_schedule_timeout_killable_unsafe(timeout); timeout <<= 1; if (timeout > NFS4_LOCK_MAXTIMEOUT) return NFS4_LOCK_MAXTIMEOUT; @@ -3731,8 +5144,9 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock if (status != 0) goto out; lsp = request->fl_u.nfs4_fl.owner; - arg.lock_owner.id = lsp->ls_id.id; - status = nfs4_call_sync(server, &msg, &arg, &res, 1); + arg.lock_owner.id = lsp->ls_seqid.owner_id; + arg.lock_owner.s_dev = server->s_dev; + status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); switch (status) { case 0: request->fl_type = F_UNLCK; @@ -3741,6 +5155,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock status = 0; } request->fl_ops->fl_release_private(request); + request->fl_ops = NULL; out: return status; } @@ -3751,8 +5166,9 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock * int err; do { - err = nfs4_handle_exception(NFS_SERVER(state->inode), - _nfs4_proc_getlk(state, cmd, request), + err = _nfs4_proc_getlk(state, cmd, request); + trace_nfs4_get_lock(request, state, cmd, err); + err = nfs4_handle_exception(NFS_SERVER(state->inode), err, &exception); } while (exception.retry); return err; @@ -3826,9 +5242,8 @@ static void nfs4_locku_done(struct rpc_task *task, void *data) return; switch (task->tk_status) { case 0: - memcpy(calldata->lsp->ls_stateid.data, - calldata->res.stateid.data, - sizeof(calldata->lsp->ls_stateid.data)); + nfs4_stateid_copy(&calldata->lsp->ls_stateid, + &calldata->res.stateid); renew_lease(calldata->server, calldata->timestamp); break; case -NFS4ERR_BAD_STATEID: @@ -3838,9 +5253,9 @@ static void nfs4_locku_done(struct rpc_task *task, void *data) break; default: if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) - nfs_restart_rpc(task, - calldata->server->nfs_client); + rpc_restart_call_prepare(task); } + nfs_release_seqid(calldata->arg.seqid); } static void nfs4_locku_prepare(struct rpc_task *task, void *data) @@ -3848,18 +5263,22 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data) struct nfs4_unlockdata *calldata = data; if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) - return; - if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { + goto out_wait; + if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { /* Note: exit _without_ running nfs4_locku_done */ - task->tk_action = NULL; - return; + goto out_no_action; } calldata->timestamp = jiffies; if (nfs4_setup_sequence(calldata->server, &calldata->arg.seq_args, - &calldata->res.seq_res, 1, task)) - return; - rpc_call_start(task); + &calldata->res.seq_res, + task) != 0) + nfs_release_seqid(calldata->arg.seqid); + return; +out_no_action: + task->tk_action = NULL; +out_wait: + nfs4_sequence_done(task, &calldata->res.seq_res); } static const struct rpc_call_ops nfs4_locku_ops = { @@ -3886,6 +5305,9 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, .flags = RPC_TASK_ASYNC, }; + nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, + NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); + /* Ensure this is an unlock - when canceling a lock, the * canceled lock is passed in, and it won't be an unlock. */ @@ -3897,15 +5319,18 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, return ERR_PTR(-ENOMEM); } - msg.rpc_argp = &data->arg, - msg.rpc_resp = &data->res, + nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); + msg.rpc_argp = &data->arg; + msg.rpc_resp = &data->res; task_setup_data.callback_data = data; return rpc_run_task(&task_setup_data); } static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) { - struct nfs_inode *nfsi = NFS_I(state->inode); + struct inode *inode = state->inode; + struct nfs4_state_owner *sp = state->owner; + struct nfs_inode *nfsi = NFS_I(inode); struct nfs_seqid *seqid; struct nfs4_lock_state *lsp; struct rpc_task *task; @@ -3915,18 +5340,23 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock * status = nfs4_set_lock_state(state, request); /* Unlock _before_ we do the RPC call */ request->fl_flags |= FL_EXISTS; + /* Exclude nfs_delegation_claim_locks() */ + mutex_lock(&sp->so_delegreturn_mutex); + /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ down_read(&nfsi->rwsem); if (do_vfs_lock(request->fl_file, request) == -ENOENT) { up_read(&nfsi->rwsem); + mutex_unlock(&sp->so_delegreturn_mutex); goto out; } up_read(&nfsi->rwsem); + mutex_unlock(&sp->so_delegreturn_mutex); if (status != 0) goto out; /* Is this a delegated lock? */ - if (test_bit(NFS_DELEGATED_STATE, &state->flags)) - goto out; lsp = request->fl_u.nfs4_fl.owner; + if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) + goto out; seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); status = -ENOMEM; if (seqid == NULL) @@ -3939,6 +5369,7 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock * rpc_put_task(task); out: request->fl_flags = fl_flags; + trace_nfs4_unlock(request, state, F_SETLK, status); return status; } @@ -3976,7 +5407,8 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, goto out_free_seqid; p->arg.lock_stateid = &lsp->ls_stateid; p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; - p->arg.lock_owner.id = lsp->ls_id.id; + p->arg.lock_owner.id = lsp->ls_seqid.owner_id; + p->arg.lock_owner.s_dev = server->s_dev; p->res.lock_seqid = p->arg.lock_seqid; p->lsp = lsp; p->server = server; @@ -3998,31 +5430,37 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) dprintk("%s: begin!\n", __func__); if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) - return; + goto out_wait; /* Do we need to do an open_to_lock_owner? */ if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { - if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) - return; - data->arg.open_stateid = &state->stateid; + if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { + goto out_release_lock_seqid; + } + data->arg.open_stateid = &state->open_stateid; data->arg.new_lock_owner = 1; data->res.open_seqid = data->arg.open_seqid; } else data->arg.new_lock_owner = 0; + if (!nfs4_valid_open_stateid(state)) { + data->rpc_status = -EBADF; + task->tk_action = NULL; + goto out_release_open_seqid; + } data->timestamp = jiffies; if (nfs4_setup_sequence(data->server, &data->arg.seq_args, - &data->res.seq_res, 1, task)) + &data->res.seq_res, + task) == 0) return; - rpc_call_start(task); +out_release_open_seqid: + nfs_release_seqid(data->arg.open_seqid); +out_release_lock_seqid: + nfs_release_seqid(data->arg.lock_seqid); +out_wait: + nfs4_sequence_done(task, &data->res.seq_res); dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); } -static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs4_lock_prepare(task, calldata); -} - static void nfs4_lock_done(struct rpc_task *task, void *calldata) { struct nfs4_lockdata *data = calldata; @@ -4040,10 +5478,9 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata) goto out; } if (data->rpc_status == 0) { - memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, - sizeof(data->lsp->ls_stateid.data)); - data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; - renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); + nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); + set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags); + renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); } out: dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); @@ -4060,7 +5497,7 @@ static void nfs4_lock_release(void *calldata) task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, data->arg.lock_seqid); if (!IS_ERR(task)) - rpc_put_task(task); + rpc_put_task_async(task); dprintk("%s: cancelling lock!\n", __func__); } else nfs_free_seqid(data->arg.lock_seqid); @@ -4076,31 +5513,20 @@ static const struct rpc_call_ops nfs4_lock_ops = { .rpc_release = nfs4_lock_release, }; -static const struct rpc_call_ops nfs4_recover_lock_ops = { - .rpc_call_prepare = nfs4_recover_lock_prepare, - .rpc_call_done = nfs4_lock_done, - .rpc_release = nfs4_lock_release, -}; - static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) { - struct nfs_client *clp = server->nfs_client; - struct nfs4_state *state = lsp->ls_state; - switch (error) { case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_BAD_STATEID: - case -NFS4ERR_EXPIRED: - if (new_lock_owner != 0 || - (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) - nfs4_state_mark_reclaim_nograce(clp, state); lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; + if (new_lock_owner != 0 || + test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) + nfs4_schedule_stateid_recovery(server, lsp->ls_state); break; case -NFS4ERR_STALE_STATEID: - if (new_lock_owner != 0 || - (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) - nfs4_state_mark_reclaim_reboot(clp, state); lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; + case -NFS4ERR_EXPIRED: + nfs4_schedule_lease_recovery(server->nfs_client); }; } @@ -4129,14 +5555,15 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f return -ENOMEM; if (IS_SETLKW(cmd)) data->arg.block = 1; + nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); + msg.rpc_argp = &data->arg; + msg.rpc_resp = &data->res; + task_setup_data.callback_data = data; if (recovery_type > NFS_LOCK_NEW) { if (recovery_type == NFS_LOCK_RECLAIM) data->arg.reclaim = NFS_LOCK_RECLAIM; - task_setup_data.callback_ops = &nfs4_recover_lock_ops; + nfs4_set_sequence_privileged(&data->arg.seq_args); } - msg.rpc_argp = &data->arg, - msg.rpc_resp = &data->res, - task_setup_data.callback_data = data; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -4156,7 +5583,9 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) { struct nfs_server *server = NFS_SERVER(state->inode); - struct nfs4_exception exception = { }; + struct nfs4_exception exception = { + .inode = state->inode, + }; int err; do { @@ -4164,6 +5593,7 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) return 0; err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); + trace_nfs4_lock_reclaim(request, state, F_SETLK, err); if (err != -NFS4ERR_DELAY) break; nfs4_handle_exception(server, err, &exception); @@ -4174,16 +5604,23 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) { struct nfs_server *server = NFS_SERVER(state->inode); - struct nfs4_exception exception = { }; + struct nfs4_exception exception = { + .inode = state->inode, + }; int err; err = nfs4_set_lock_state(state, request); if (err != 0) return err; + if (!recover_lost_locks) { + set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); + return 0; + } do { if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) return 0; err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); + trace_nfs4_lock_expired(request, state, F_SETLK, err); switch (err) { default: goto out; @@ -4197,10 +5634,63 @@ out: return err; } +#if defined(CONFIG_NFS_V4_1) +/** + * nfs41_check_expired_locks - possibly free a lock stateid + * + * @state: NFSv4 state for an inode + * + * Returns NFS_OK if recovery for this stateid is now finished. + * Otherwise a negative NFS4ERR value is returned. + */ +static int nfs41_check_expired_locks(struct nfs4_state *state) +{ + int status, ret = -NFS4ERR_BAD_STATEID; + struct nfs4_lock_state *lsp; + struct nfs_server *server = NFS_SERVER(state->inode); + + list_for_each_entry(lsp, &state->lock_states, ls_locks) { + if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { + struct rpc_cred *cred = lsp->ls_state->owner->so_cred; + + status = nfs41_test_stateid(server, + &lsp->ls_stateid, + cred); + trace_nfs4_test_lock_stateid(state, lsp, status); + if (status != NFS_OK) { + /* Free the stateid unless the server + * informs us the stateid is unrecognized. */ + if (status != -NFS4ERR_BAD_STATEID) + nfs41_free_stateid(server, + &lsp->ls_stateid, + cred); + clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); + ret = status; + } + } + }; + + return ret; +} + +static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) +{ + int status = NFS_OK; + + if (test_bit(LK_STATE_IN_USE, &state->flags)) + status = nfs41_check_expired_locks(state); + if (status != NFS_OK) + status = nfs4_lock_expired(state, request); + return status; +} +#endif + static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) { + struct nfs4_state_owner *sp = state->owner; struct nfs_inode *nfsi = NFS_I(state->inode); unsigned char fl_flags = request->fl_flags; + unsigned int seq; int status = -ENOLCK; if ((fl_flags & FL_POSIX) && @@ -4222,13 +5712,21 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock status = do_vfs_lock(request->fl_file, request); goto out_unlock; } + seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); + up_read(&nfsi->rwsem); status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); if (status != 0) + goto out; + down_read(&nfsi->rwsem); + if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) { + status = -NFS4ERR_DELAY; goto out_unlock; + } /* Note: we always want to sleep here! */ request->fl_flags = fl_flags | FL_SLEEP; if (do_vfs_lock(request->fl_file, request) < 0) - printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); + printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " + "manager!\n", __func__); out_unlock: up_read(&nfsi->rwsem); out: @@ -4238,11 +5736,15 @@ out: static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) { - struct nfs4_exception exception = { }; + struct nfs4_exception exception = { + .state = state, + .inode = state->inode, + }; int err; do { err = _nfs4_proc_setlk(state, cmd, request); + trace_nfs4_set_lock(request, state, cmd, err); if (err == -NFS4ERR_DENIED) err = -EAGAIN; err = nfs4_handle_exception(NFS_SERVER(state->inode), @@ -4283,6 +5785,20 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) if (state == NULL) return -ENOLCK; + /* + * Don't rely on the VFS having checked the file open mode, + * since it won't do this for flock() locks. + */ + switch (request->fl_type) { + case F_RDLCK: + if (!(filp->f_mode & FMODE_READ)) + return -EBADF; + break; + case F_WRLCK: + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + } + do { status = nfs4_proc_setlk(state, cmd, request); if ((status != -EAGAIN) || IS_SETLK(cmd)) @@ -4295,157 +5811,200 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) return status; } -int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) +int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) { struct nfs_server *server = NFS_SERVER(state->inode); - struct nfs4_exception exception = { }; int err; err = nfs4_set_lock_state(state, fl); if (err != 0) - goto out; - do { - err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); - switch (err) { - default: - printk(KERN_ERR "%s: unhandled error %d.\n", - __func__, err); - case 0: - case -ESTALE: - goto out; - case -NFS4ERR_EXPIRED: - case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_STALE_STATEID: - case -NFS4ERR_BADSESSION: - case -NFS4ERR_BADSLOT: - case -NFS4ERR_BAD_HIGH_SLOT: - case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: - case -NFS4ERR_DEADSESSION: - nfs4_schedule_state_recovery(server->nfs_client); - goto out; - case -ERESTARTSYS: - /* - * The show must go on: exit, but mark the - * stateid as needing recovery. - */ - case -NFS4ERR_ADMIN_REVOKED: - case -NFS4ERR_BAD_STATEID: - case -NFS4ERR_OPENMODE: - nfs4_state_mark_reclaim_nograce(server->nfs_client, state); - err = 0; - goto out; - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ - err = 0; - goto out; - case -ENOMEM: - case -NFS4ERR_DENIED: - /* kill_proc(fl->fl_pid, SIGLOST, 1); */ - err = 0; - goto out; - case -NFS4ERR_DELAY: - break; - } - err = nfs4_handle_exception(server, err, &exception); - } while (exception.retry); -out: - return err; + return err; + err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); + return nfs4_handle_delegation_recall_error(server, state, stateid, err); +} + +struct nfs_release_lockowner_data { + struct nfs4_lock_state *lsp; + struct nfs_server *server; + struct nfs_release_lockowner_args args; + struct nfs_release_lockowner_res res; + unsigned long timestamp; +}; + +static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs_release_lockowner_data *data = calldata; + nfs40_setup_sequence(data->server, + &data->args.seq_args, &data->res.seq_res, task); + data->timestamp = jiffies; +} + +static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) +{ + struct nfs_release_lockowner_data *data = calldata; + struct nfs_server *server = data->server; + + nfs40_sequence_done(task, &data->res.seq_res); + + switch (task->tk_status) { + case 0: + renew_lease(server, data->timestamp); + break; + case -NFS4ERR_STALE_CLIENTID: + case -NFS4ERR_EXPIRED: + case -NFS4ERR_LEASE_MOVED: + case -NFS4ERR_DELAY: + if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) + rpc_restart_call_prepare(task); + } } static void nfs4_release_lockowner_release(void *calldata) { + struct nfs_release_lockowner_data *data = calldata; + nfs4_free_lock_state(data->server, data->lsp); kfree(calldata); } -const struct rpc_call_ops nfs4_release_lockowner_ops = { +static const struct rpc_call_ops nfs4_release_lockowner_ops = { + .rpc_call_prepare = nfs4_release_lockowner_prepare, + .rpc_call_done = nfs4_release_lockowner_done, .rpc_release = nfs4_release_lockowner_release, }; -void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) +static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) { - struct nfs_server *server = lsp->ls_state->owner->so_server; - struct nfs_release_lockowner_args *args; + struct nfs_release_lockowner_data *data; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], }; if (server->nfs_client->cl_mvops->minor_version != 0) - return; - args = kmalloc(sizeof(*args), GFP_NOFS); - if (!args) - return; - args->lock_owner.clientid = server->nfs_client->cl_clientid; - args->lock_owner.id = lsp->ls_id.id; - msg.rpc_argp = args; - rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); + return -EINVAL; + + data = kmalloc(sizeof(*data), GFP_NOFS); + if (!data) + return -ENOMEM; + data->lsp = lsp; + data->server = server; + data->args.lock_owner.clientid = server->nfs_client->cl_clientid; + data->args.lock_owner.id = lsp->ls_seqid.owner_id; + data->args.lock_owner.s_dev = server->s_dev; + + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); + rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); + return 0; } #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" -int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, - size_t buflen, int flags) +static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, + const void *buf, size_t buflen, + int flags, int type) { - struct inode *inode = dentry->d_inode; - - if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) - return -EOPNOTSUPP; + if (strcmp(key, "") != 0) + return -EINVAL; - return nfs4_proc_set_acl(inode, buf, buflen); + return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); } -/* The getxattr man page suggests returning -ENODATA for unknown attributes, - * and that's what we'll do for e.g. user attributes that haven't been set. - * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported - * attributes in kernel-managed attribute namespaces. */ -ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, - size_t buflen) +static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, + void *buf, size_t buflen, int type) { - struct inode *inode = dentry->d_inode; - - if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) - return -EOPNOTSUPP; + if (strcmp(key, "") != 0) + return -EINVAL; - return nfs4_proc_get_acl(inode, buf, buflen); + return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); } -ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) +static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, + size_t list_len, const char *name, + size_t name_len, int type) { - size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; + size_t len = sizeof(XATTR_NAME_NFSV4_ACL); if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) return 0; - if (buf && buflen < len) - return -ERANGE; - if (buf) - memcpy(buf, XATTR_NAME_NFSV4_ACL, len); + + if (list && len <= list_len) + memcpy(list, XATTR_NAME_NFSV4_ACL, len); + return len; +} + +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static inline int nfs4_server_supports_labels(struct nfs_server *server) +{ + return server->caps & NFS_CAP_SECURITY_LABEL; +} + +static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key, + const void *buf, size_t buflen, + int flags, int type) +{ + if (security_ismaclabel(key)) + return nfs4_set_security_label(dentry, buf, buflen); + + return -EOPNOTSUPP; +} + +static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key, + void *buf, size_t buflen, int type) +{ + if (security_ismaclabel(key)) + return nfs4_get_security_label(dentry->d_inode, buf, buflen); + return -EOPNOTSUPP; +} + +static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list, + size_t list_len, const char *name, + size_t name_len, int type) +{ + size_t len = 0; + + if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) { + len = security_inode_listsecurity(dentry->d_inode, NULL, 0); + if (list && len <= list_len) + security_inode_listsecurity(dentry->d_inode, list, len); + } return len; } +static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .list = nfs4_xattr_list_nfs4_label, + .get = nfs4_xattr_get_nfs4_label, + .set = nfs4_xattr_set_nfs4_label, +}; +#endif + + +/* + * nfs_fhget will use either the mounted_on_fileid or the fileid + */ static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) { - if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && - (fattr->valid & NFS_ATTR_FATTR_FSID) && - (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) + if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || + (fattr->valid & NFS_ATTR_FATTR_FILEID)) && + (fattr->valid & NFS_ATTR_FATTR_FSID) && + (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) return; fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | - NFS_ATTR_FATTR_NLINK; + NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; fattr->nlink = 2; } -int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, - struct nfs4_fs_locations *fs_locations, struct page *page) +static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, + struct nfs4_fs_locations *fs_locations, + struct page *page) { struct nfs_server *server = NFS_SERVER(dir); - u32 bitmask[2] = { + u32 bitmask[3] = { [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, - [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, }; struct nfs4_fs_locations_arg args = { .dir_fh = NFS_FH(dir), @@ -4464,33 +6023,613 @@ int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, int status; dprintk("%s: start\n", __func__); + + /* Ask for the fileid of the absent filesystem if mounted_on_fileid + * is not supported */ + if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) + bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; + else + bitmask[0] |= FATTR4_WORD0_FILEID; + nfs_fattr_init(&fs_locations->fattr); fs_locations->server = server; fs_locations->nlocations = 0; - status = nfs4_call_sync(server, &msg, &args, &res, 0); - nfs_fixup_referral_attributes(&fs_locations->fattr); + status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); dprintk("%s: returned status = %d\n", __func__, status); return status; } +int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, + struct nfs4_fs_locations *fs_locations, + struct page *page) +{ + struct nfs4_exception exception = { }; + int err; + do { + err = _nfs4_proc_fs_locations(client, dir, name, + fs_locations, page); + trace_nfs4_get_fs_locations(dir, name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, + &exception); + } while (exception.retry); + return err; +} + +/* + * This operation also signals the server that this client is + * performing migration recovery. The server can stop returning + * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is + * appended to this compound to identify the client ID which is + * performing recovery. + */ +static int _nfs40_proc_get_locations(struct inode *inode, + struct nfs4_fs_locations *locations, + struct page *page, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct rpc_clnt *clnt = server->client; + u32 bitmask[2] = { + [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, + }; + struct nfs4_fs_locations_arg args = { + .clientid = server->nfs_client->cl_clientid, + .fh = NFS_FH(inode), + .page = page, + .bitmask = bitmask, + .migration = 1, /* skip LOOKUP */ + .renew = 1, /* append RENEW */ + }; + struct nfs4_fs_locations_res res = { + .fs_locations = locations, + .migration = 1, + .renew = 1, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], + .rpc_argp = &args, + .rpc_resp = &res, + .rpc_cred = cred, + }; + unsigned long now = jiffies; + int status; + + nfs_fattr_init(&locations->fattr); + locations->server = server; + locations->nlocations = 0; + + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(clnt, server, &msg, + &args.seq_args, &res.seq_res); + if (status) + return status; + + renew_lease(server, now); + return 0; +} + #ifdef CONFIG_NFS_V4_1 + /* - * nfs4_proc_exchange_id() + * This operation also signals the server that this client is + * performing migration recovery. The server can stop asserting + * SEQ4_STATUS_LEASE_MOVED for this client. The client ID + * performing this operation is identified in the SEQUENCE + * operation in this compound. * - * Since the clientid has expired, all compounds using sessions - * associated with the stale clientid will be returning - * NFS4ERR_BADSESSION in the sequence operation, and will therefore - * be in some phase of session reset. + * When the client supports GETATTR(fs_locations_info), it can + * be plumbed in here. */ -int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) +static int _nfs41_proc_get_locations(struct inode *inode, + struct nfs4_fs_locations *locations, + struct page *page, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct rpc_clnt *clnt = server->client; + u32 bitmask[2] = { + [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, + }; + struct nfs4_fs_locations_arg args = { + .fh = NFS_FH(inode), + .page = page, + .bitmask = bitmask, + .migration = 1, /* skip LOOKUP */ + }; + struct nfs4_fs_locations_res res = { + .fs_locations = locations, + .migration = 1, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], + .rpc_argp = &args, + .rpc_resp = &res, + .rpc_cred = cred, + }; + int status; + + nfs_fattr_init(&locations->fattr); + locations->server = server; + locations->nlocations = 0; + + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(clnt, server, &msg, + &args.seq_args, &res.seq_res); + if (status == NFS4_OK && + res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) + status = -NFS4ERR_LEASE_MOVED; + return status; +} + +#endif /* CONFIG_NFS_V4_1 */ + +/** + * nfs4_proc_get_locations - discover locations for a migrated FSID + * @inode: inode on FSID that is migrating + * @locations: result of query + * @page: buffer + * @cred: credential to use for this operation + * + * Returns NFS4_OK on success, a negative NFS4ERR status code if the + * operation failed, or a negative errno if a local error occurred. + * + * On success, "locations" is filled in, but if the server has + * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not + * asserted. + * + * -NFS4ERR_LEASE_MOVED is returned if the server still has leases + * from this client that require migration recovery. + */ +int nfs4_proc_get_locations(struct inode *inode, + struct nfs4_fs_locations *locations, + struct page *page, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = server->nfs_client; + const struct nfs4_mig_recovery_ops *ops = + clp->cl_mvops->mig_recovery_ops; + struct nfs4_exception exception = { }; + int status; + + dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, + (unsigned long long)server->fsid.major, + (unsigned long long)server->fsid.minor, + clp->cl_hostname); + nfs_display_fhandle(NFS_FH(inode), __func__); + + do { + status = ops->get_locations(inode, locations, page, cred); + if (status != -NFS4ERR_DELAY) + break; + nfs4_handle_exception(server, status, &exception); + } while (exception.retry); + return status; +} + +/* + * This operation also signals the server that this client is + * performing "lease moved" recovery. The server can stop + * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation + * is appended to this compound to identify the client ID which is + * performing recovery. + */ +static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct rpc_clnt *clnt = server->client; + struct nfs4_fsid_present_arg args = { + .fh = NFS_FH(inode), + .clientid = clp->cl_clientid, + .renew = 1, /* append RENEW */ + }; + struct nfs4_fsid_present_res res = { + .renew = 1, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], + .rpc_argp = &args, + .rpc_resp = &res, + .rpc_cred = cred, + }; + unsigned long now = jiffies; + int status; + + res.fh = nfs_alloc_fhandle(); + if (res.fh == NULL) + return -ENOMEM; + + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(clnt, server, &msg, + &args.seq_args, &res.seq_res); + nfs_free_fhandle(res.fh); + if (status) + return status; + + do_renew_lease(clp, now); + return 0; +} + +#ifdef CONFIG_NFS_V4_1 + +/* + * This operation also signals the server that this client is + * performing "lease moved" recovery. The server can stop asserting + * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing + * this operation is identified in the SEQUENCE operation in this + * compound. + */ +static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct rpc_clnt *clnt = server->client; + struct nfs4_fsid_present_arg args = { + .fh = NFS_FH(inode), + }; + struct nfs4_fsid_present_res res = { + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], + .rpc_argp = &args, + .rpc_resp = &res, + .rpc_cred = cred, + }; + int status; + + res.fh = nfs_alloc_fhandle(); + if (res.fh == NULL) + return -ENOMEM; + + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(clnt, server, &msg, + &args.seq_args, &res.seq_res); + nfs_free_fhandle(res.fh); + if (status == NFS4_OK && + res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) + status = -NFS4ERR_LEASE_MOVED; + return status; +} + +#endif /* CONFIG_NFS_V4_1 */ + +/** + * nfs4_proc_fsid_present - Is this FSID present or absent on server? + * @inode: inode on FSID to check + * @cred: credential to use for this operation + * + * Server indicates whether the FSID is present, moved, or not + * recognized. This operation is necessary to clear a LEASE_MOVED + * condition for this client ID. + * + * Returns NFS4_OK if the FSID is present on this server, + * -NFS4ERR_MOVED if the FSID is no longer present, a negative + * NFS4ERR code if some error occurred on the server, or a + * negative errno if a local failure occurred. + */ +int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = server->nfs_client; + const struct nfs4_mig_recovery_ops *ops = + clp->cl_mvops->mig_recovery_ops; + struct nfs4_exception exception = { }; + int status; + + dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, + (unsigned long long)server->fsid.major, + (unsigned long long)server->fsid.minor, + clp->cl_hostname); + nfs_display_fhandle(NFS_FH(inode), __func__); + + do { + status = ops->fsid_present(inode, cred); + if (status != -NFS4ERR_DELAY) + break; + nfs4_handle_exception(server, status, &exception); + } while (exception.retry); + return status; +} + +/** + * If 'use_integrity' is true and the state managment nfs_client + * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient + * and the machine credential as per RFC3530bis and RFC5661 Security + * Considerations sections. Otherwise, just use the user cred with the + * filesystem's rpc_client. + */ +static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) +{ + int status; + struct nfs4_secinfo_arg args = { + .dir_fh = NFS_FH(dir), + .name = name, + }; + struct nfs4_secinfo_res res = { + .flavors = flavors, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], + .rpc_argp = &args, + .rpc_resp = &res, + }; + struct rpc_clnt *clnt = NFS_SERVER(dir)->client; + struct rpc_cred *cred = NULL; + + if (use_integrity) { + clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; + cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); + msg.rpc_cred = cred; + } + + dprintk("NFS call secinfo %s\n", name->name); + + nfs4_state_protect(NFS_SERVER(dir)->nfs_client, + NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); + + status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, + &res.seq_res, 0); + dprintk("NFS reply secinfo: %d\n", status); + + if (cred) + put_rpccred(cred); + + return status; +} + +int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, + struct nfs4_secinfo_flavors *flavors) +{ + struct nfs4_exception exception = { }; + int err; + do { + err = -NFS4ERR_WRONGSEC; + + /* try to use integrity protection with machine cred */ + if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) + err = _nfs4_proc_secinfo(dir, name, flavors, true); + + /* + * if unable to use integrity protection, or SECINFO with + * integrity protection returns NFS4ERR_WRONGSEC (which is + * disallowed by spec, but exists in deployed servers) use + * the current filesystem's rpc_client and the user cred. + */ + if (err == -NFS4ERR_WRONGSEC) + err = _nfs4_proc_secinfo(dir, name, flavors, false); + + trace_nfs4_secinfo(dir, name, err); + err = nfs4_handle_exception(NFS_SERVER(dir), err, + &exception); + } while (exception.retry); + return err; +} + +#ifdef CONFIG_NFS_V4_1 +/* + * Check the exchange flags returned by the server for invalid flags, having + * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or + * DS flags set. + */ +static int nfs4_check_cl_exchange_flags(u32 flags) +{ + if (flags & ~EXCHGID4_FLAG_MASK_R) + goto out_inval; + if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && + (flags & EXCHGID4_FLAG_USE_NON_PNFS)) + goto out_inval; + if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) + goto out_inval; + return NFS_OK; +out_inval: + return -NFS4ERR_INVAL; +} + +static bool +nfs41_same_server_scope(struct nfs41_server_scope *a, + struct nfs41_server_scope *b) +{ + if (a->server_scope_sz == b->server_scope_sz && + memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) + return true; + + return false; +} + +/* + * nfs4_proc_bind_conn_to_session() + * + * The 4.1 client currently uses the same TCP connection for the + * fore and backchannel. + */ +int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) +{ + int status; + struct nfs41_bind_conn_to_session_res res; + struct rpc_message msg = { + .rpc_proc = + &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], + .rpc_argp = clp, + .rpc_resp = &res, + .rpc_cred = cred, + }; + + dprintk("--> %s\n", __func__); + + res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); + if (unlikely(res.session == NULL)) { + status = -ENOMEM; + goto out; + } + + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_bind_conn_to_session(clp, status); + if (status == 0) { + if (memcmp(res.session->sess_id.data, + clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { + dprintk("NFS: %s: Session ID mismatch\n", __func__); + status = -EIO; + goto out_session; + } + if (res.dir != NFS4_CDFS4_BOTH) { + dprintk("NFS: %s: Unexpected direction from server\n", + __func__); + status = -EIO; + goto out_session; + } + if (res.use_conn_in_rdma_mode) { + dprintk("NFS: %s: Server returned RDMA mode = true\n", + __func__); + status = -EIO; + goto out_session; + } + } +out_session: + kfree(res.session); +out: + dprintk("<-- %s status= %d\n", __func__, status); + return status; +} + +/* + * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map + * and operations we'd like to see to enable certain features in the allow map + */ +static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { + .how = SP4_MACH_CRED, + .enforce.u.words = { + [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | + 1 << (OP_EXCHANGE_ID - 32) | + 1 << (OP_CREATE_SESSION - 32) | + 1 << (OP_DESTROY_SESSION - 32) | + 1 << (OP_DESTROY_CLIENTID - 32) + }, + .allow.u.words = { + [0] = 1 << (OP_CLOSE) | + 1 << (OP_LOCKU) | + 1 << (OP_COMMIT), + [1] = 1 << (OP_SECINFO - 32) | + 1 << (OP_SECINFO_NO_NAME - 32) | + 1 << (OP_TEST_STATEID - 32) | + 1 << (OP_FREE_STATEID - 32) | + 1 << (OP_WRITE - 32) + } +}; + +/* + * Select the state protection mode for client `clp' given the server results + * from exchange_id in `sp'. + * + * Returns 0 on success, negative errno otherwise. + */ +static int nfs4_sp4_select_mode(struct nfs_client *clp, + struct nfs41_state_protection *sp) +{ + static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { + [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | + 1 << (OP_EXCHANGE_ID - 32) | + 1 << (OP_CREATE_SESSION - 32) | + 1 << (OP_DESTROY_SESSION - 32) | + 1 << (OP_DESTROY_CLIENTID - 32) + }; + unsigned int i; + + if (sp->how == SP4_MACH_CRED) { + /* Print state protect result */ + dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); + for (i = 0; i <= LAST_NFS4_OP; i++) { + if (test_bit(i, sp->enforce.u.longs)) + dfprintk(MOUNT, " enforce op %d\n", i); + if (test_bit(i, sp->allow.u.longs)) + dfprintk(MOUNT, " allow op %d\n", i); + } + + /* make sure nothing is on enforce list that isn't supported */ + for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { + if (sp->enforce.u.words[i] & ~supported_enforce[i]) { + dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); + return -EINVAL; + } + } + + /* + * Minimal mode - state operations are allowed to use machine + * credential. Note this already happens by default, so the + * client doesn't have to do anything more than the negotiation. + * + * NOTE: we don't care if EXCHANGE_ID is in the list - + * we're already using the machine cred for exchange_id + * and will never use a different cred. + */ + if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && + test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && + test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && + test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { + dfprintk(MOUNT, "sp4_mach_cred:\n"); + dfprintk(MOUNT, " minimal mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); + } else { + dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); + return -EINVAL; + } + + if (test_bit(OP_CLOSE, sp->allow.u.longs) && + test_bit(OP_LOCKU, sp->allow.u.longs)) { + dfprintk(MOUNT, " cleanup mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); + } + + if (test_bit(OP_SECINFO, sp->allow.u.longs) && + test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { + dfprintk(MOUNT, " secinfo mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); + } + + if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && + test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { + dfprintk(MOUNT, " stateid mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); + } + + if (test_bit(OP_WRITE, sp->allow.u.longs)) { + dfprintk(MOUNT, " write mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); + } + + if (test_bit(OP_COMMIT, sp->allow.u.longs)) { + dfprintk(MOUNT, " commit mode enabled\n"); + set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); + } + } + + return 0; +} + +/* + * _nfs4_proc_exchange_id() + * + * Wrapper for EXCHANGE_ID operation. + */ +static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, + u32 sp4_how) { nfs4_verifier verifier; struct nfs41_exchange_id_args args = { + .verifier = &verifier, .client = clp, - .flags = clp->cl_exchange_flags, +#ifdef CONFIG_NFS_V4_1_MIGRATION + .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | + EXCHGID4_FLAG_BIND_PRINC_STATEID | + EXCHGID4_FLAG_SUPP_MOVED_MIGR, +#else + .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | + EXCHGID4_FLAG_BIND_PRINC_STATEID, +#endif }; struct nfs41_exchange_id_res res = { - .client = clp, + 0 }; int status; struct rpc_message msg = { @@ -4499,43 +6638,195 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) .rpc_resp = &res, .rpc_cred = cred, }; - __be32 *p; - dprintk("--> %s\n", __func__); - BUG_ON(clp == NULL); + nfs4_init_boot_verifier(clp, &verifier); + args.id_len = nfs4_init_uniform_client_string(clp, args.id, + sizeof(args.id)); + dprintk("NFS call exchange_id auth=%s, '%.*s'\n", + clp->cl_rpcclient->cl_auth->au_ops->au_name, + args.id_len, args.id); + + res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), + GFP_NOFS); + if (unlikely(res.server_owner == NULL)) { + status = -ENOMEM; + goto out; + } + + res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), + GFP_NOFS); + if (unlikely(res.server_scope == NULL)) { + status = -ENOMEM; + goto out_server_owner; + } + + res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); + if (unlikely(res.impl_id == NULL)) { + status = -ENOMEM; + goto out_server_scope; + } - /* Remove server-only flags */ - args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; + switch (sp4_how) { + case SP4_NONE: + args.state_protect.how = SP4_NONE; + break; - p = (u32 *)verifier.data; - *p++ = htonl((u32)clp->cl_boot_time.tv_sec); - *p = htonl((u32)clp->cl_boot_time.tv_nsec); - args.verifier = &verifier; + case SP4_MACH_CRED: + args.state_protect = nfs4_sp4_mach_cred_request; + break; - while (1) { - args.id_len = scnprintf(args.id, sizeof(args.id), - "%s/%s %u", - clp->cl_ipaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR), - clp->cl_id_uniquifier); + default: + /* unsupported! */ + WARN_ON_ONCE(1); + status = -EINVAL; + goto out_server_scope; + } - status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_exchange_id(clp, status); + if (status == 0) + status = nfs4_check_cl_exchange_flags(res.flags); - if (status != -NFS4ERR_CLID_INUSE) - break; + if (status == 0) + status = nfs4_sp4_select_mode(clp, &res.state_protect); - if (signalled()) - break; + if (status == 0) { + clp->cl_clientid = res.clientid; + clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R); + if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) + clp->cl_seqid = res.seqid; + + kfree(clp->cl_serverowner); + clp->cl_serverowner = res.server_owner; + res.server_owner = NULL; + + /* use the most recent implementation id */ + kfree(clp->cl_implid); + clp->cl_implid = res.impl_id; + + if (clp->cl_serverscope != NULL && + !nfs41_same_server_scope(clp->cl_serverscope, + res.server_scope)) { + dprintk("%s: server_scope mismatch detected\n", + __func__); + set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); + kfree(clp->cl_serverscope); + clp->cl_serverscope = NULL; + } - if (++clp->cl_id_uniquifier == 0) - break; + if (clp->cl_serverscope == NULL) { + clp->cl_serverscope = res.server_scope; + goto out; + } + } else + kfree(res.impl_id); + +out_server_owner: + kfree(res.server_owner); +out_server_scope: + kfree(res.server_scope); +out: + if (clp->cl_implid != NULL) + dprintk("NFS reply exchange_id: Server Implementation ID: " + "domain: %s, name: %s, date: %llu,%u\n", + clp->cl_implid->domain, clp->cl_implid->name, + clp->cl_implid->date.seconds, + clp->cl_implid->date.nseconds); + dprintk("NFS reply exchange_id: %d\n", status); + return status; +} + +/* + * nfs4_proc_exchange_id() + * + * Returns zero, a negative errno, or a negative NFS4ERR status code. + * + * Since the clientid has expired, all compounds using sessions + * associated with the stale clientid will be returning + * NFS4ERR_BADSESSION in the sequence operation, and will therefore + * be in some phase of session reset. + * + * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. + */ +int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) +{ + rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; + int status; + + /* try SP4_MACH_CRED if krb5i/p */ + if (authflavor == RPC_AUTH_GSS_KRB5I || + authflavor == RPC_AUTH_GSS_KRB5P) { + status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); + if (!status) + return 0; } - dprintk("<-- %s status= %d\n", __func__, status); + /* try SP4_NONE */ + return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); +} + +static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, + struct rpc_cred *cred) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], + .rpc_argp = clp, + .rpc_cred = cred, + }; + int status; + + status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_destroy_clientid(clp, status); + if (status) + dprintk("NFS: Got error %d from the server %s on " + "DESTROY_CLIENTID.", status, clp->cl_hostname); return status; } +static int nfs4_proc_destroy_clientid(struct nfs_client *clp, + struct rpc_cred *cred) +{ + unsigned int loop; + int ret; + + for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { + ret = _nfs4_proc_destroy_clientid(clp, cred); + switch (ret) { + case -NFS4ERR_DELAY: + case -NFS4ERR_CLIENTID_BUSY: + ssleep(1); + break; + default: + return ret; + } + } + return 0; +} + +int nfs4_destroy_clientid(struct nfs_client *clp) +{ + struct rpc_cred *cred; + int ret = 0; + + if (clp->cl_mvops->minor_version < 1) + goto out; + if (clp->cl_exchange_flags == 0) + goto out; + if (clp->cl_preserve_clid) + goto out; + cred = nfs4_get_clid_cred(clp); + ret = nfs4_proc_destroy_clientid(clp, cred); + if (cred) + put_rpccred(cred); + switch (ret) { + case 0: + case -NFS4ERR_STALE_CLIENTID: + clp->cl_exchange_flags = 0; + } +out: + return ret; +} + struct nfs4_get_lease_time_data { struct nfs4_get_lease_time_args *args; struct nfs4_get_lease_time_res *res; @@ -4545,20 +6836,16 @@ struct nfs4_get_lease_time_data { static void nfs4_get_lease_time_prepare(struct rpc_task *task, void *calldata) { - int ret; struct nfs4_get_lease_time_data *data = (struct nfs4_get_lease_time_data *)calldata; dprintk("--> %s\n", __func__); - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); /* just setup sequence, do not trigger session recovery since we're invoked within one */ - ret = nfs41_setup_sequence(data->clp->cl_session, - &data->args->la_seq_args, - &data->res->lr_seq_res, 0, task); - - BUG_ON(ret == -EAGAIN); - rpc_call_start(task); + nfs41_setup_sequence(data->clp->cl_session, + &data->args->la_seq_args, + &data->res->lr_seq_res, + task); dprintk("<-- %s\n", __func__); } @@ -4580,13 +6867,15 @@ static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); rpc_delay(task, NFS4_POLL_RETRY_MIN); task->tk_status = 0; - nfs_restart_rpc(task, data->clp); + /* fall through */ + case -NFS4ERR_RETRY_UNCACHED_REP: + rpc_restart_call_prepare(task); return; } dprintk("<-- %s\n", __func__); } -struct rpc_call_ops nfs4_get_lease_time_ops = { +static const struct rpc_call_ops nfs4_get_lease_time_ops = { .rpc_call_prepare = nfs4_get_lease_time_prepare, .rpc_call_done = nfs4_get_lease_time_done, }; @@ -4612,10 +6901,13 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) .rpc_client = clp->cl_rpcclient, .rpc_message = &msg, .callback_ops = &nfs4_get_lease_time_ops, - .callback_data = &data + .callback_data = &data, + .flags = RPC_TASK_TIMEOUT, }; int status; + nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); + nfs4_set_sequence_privileged(&args.la_seq_args); dprintk("--> %s\n", __func__); task = rpc_run_task(&task_setup); @@ -4631,170 +6923,6 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) } /* - * Reset a slot table - */ -static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, - int ivalue) -{ - struct nfs4_slot *new = NULL; - int i; - int ret = 0; - - dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, - max_reqs, tbl->max_slots); - - /* Does the newly negotiated max_reqs match the existing slot table? */ - if (max_reqs != tbl->max_slots) { - ret = -ENOMEM; - new = kmalloc(max_reqs * sizeof(struct nfs4_slot), - GFP_NOFS); - if (!new) - goto out; - ret = 0; - kfree(tbl->slots); - } - spin_lock(&tbl->slot_tbl_lock); - if (new) { - tbl->slots = new; - tbl->max_slots = max_reqs; - } - for (i = 0; i < tbl->max_slots; ++i) - tbl->slots[i].seq_nr = ivalue; - spin_unlock(&tbl->slot_tbl_lock); - dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, - tbl, tbl->slots, tbl->max_slots); -out: - dprintk("<-- %s: return %d\n", __func__, ret); - return ret; -} - -/* - * Reset the forechannel and backchannel slot tables - */ -static int nfs4_reset_slot_tables(struct nfs4_session *session) -{ - int status; - - status = nfs4_reset_slot_table(&session->fc_slot_table, - session->fc_attrs.max_reqs, 1); - if (status) - return status; - - status = nfs4_reset_slot_table(&session->bc_slot_table, - session->bc_attrs.max_reqs, 0); - return status; -} - -/* Destroy the slot table */ -static void nfs4_destroy_slot_tables(struct nfs4_session *session) -{ - if (session->fc_slot_table.slots != NULL) { - kfree(session->fc_slot_table.slots); - session->fc_slot_table.slots = NULL; - } - if (session->bc_slot_table.slots != NULL) { - kfree(session->bc_slot_table.slots); - session->bc_slot_table.slots = NULL; - } - return; -} - -/* - * Initialize slot table - */ -static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, - int max_slots, int ivalue) -{ - struct nfs4_slot *slot; - int ret = -ENOMEM; - - BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); - - dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); - - slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); - if (!slot) - goto out; - ret = 0; - - spin_lock(&tbl->slot_tbl_lock); - tbl->max_slots = max_slots; - tbl->slots = slot; - tbl->highest_used_slotid = -1; /* no slot is currently used */ - spin_unlock(&tbl->slot_tbl_lock); - dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, - tbl, tbl->slots, tbl->max_slots); -out: - dprintk("<-- %s: return %d\n", __func__, ret); - return ret; -} - -/* - * Initialize the forechannel and backchannel tables - */ -static int nfs4_init_slot_tables(struct nfs4_session *session) -{ - struct nfs4_slot_table *tbl; - int status = 0; - - tbl = &session->fc_slot_table; - if (tbl->slots == NULL) { - status = nfs4_init_slot_table(tbl, - session->fc_attrs.max_reqs, 1); - if (status) - return status; - } - - tbl = &session->bc_slot_table; - if (tbl->slots == NULL) { - status = nfs4_init_slot_table(tbl, - session->bc_attrs.max_reqs, 0); - if (status) - nfs4_destroy_slot_tables(session); - } - - return status; -} - -struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) -{ - struct nfs4_session *session; - struct nfs4_slot_table *tbl; - - session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); - if (!session) - return NULL; - - init_completion(&session->complete); - - tbl = &session->fc_slot_table; - tbl->highest_used_slotid = -1; - spin_lock_init(&tbl->slot_tbl_lock); - rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); - - tbl = &session->bc_slot_table; - tbl->highest_used_slotid = -1; - spin_lock_init(&tbl->slot_tbl_lock); - rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); - - session->session_state = 1<<NFS4_SESSION_INITING; - - session->clp = clp; - return session; -} - -void nfs4_destroy_session(struct nfs4_session *session) -{ - nfs4_proc_destroy_session(session); - dprintk("%s Destroy backchannel for xprt %p\n", - __func__, session->clp->cl_rpcclient->cl_xprt); - xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, - NFS41_BC_MIN_CALLBACKS); - nfs4_destroy_slot_tables(session); - kfree(session); -} - -/* * Initialize the values to be used by the client in CREATE_SESSION * If nfs4_init_session set the fore channel request and response sizes, * use them. @@ -4805,20 +6933,16 @@ void nfs4_destroy_session(struct nfs4_session *session) */ static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) { - struct nfs4_session *session = args->client->cl_session; - unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, - mxresp_sz = session->fc_attrs.max_resp_sz; + unsigned int max_rqst_sz, max_resp_sz; + + max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; + max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; - if (mxrqst_sz == 0) - mxrqst_sz = NFS_MAX_FILE_IO_SIZE; - if (mxresp_sz == 0) - mxresp_sz = NFS_MAX_FILE_IO_SIZE; /* Fore channel attributes */ - args->fc_attrs.headerpadsz = 0; - args->fc_attrs.max_rqst_sz = mxrqst_sz; - args->fc_attrs.max_resp_sz = mxresp_sz; + args->fc_attrs.max_rqst_sz = max_rqst_sz; + args->fc_attrs.max_resp_sz = max_resp_sz; args->fc_attrs.max_ops = NFS4_MAX_OPS; - args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; + args->fc_attrs.max_reqs = max_session_slots; dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " "max_ops=%u max_reqs=%u\n", @@ -4827,7 +6951,6 @@ static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) args->fc_attrs.max_ops, args->fc_attrs.max_reqs); /* Back channel attributes */ - args->bc_attrs.headerpadsz = 0; args->bc_attrs.max_rqst_sz = PAGE_SIZE; args->bc_attrs.max_resp_sz = PAGE_SIZE; args->bc_attrs.max_resp_sz_cached = 0; @@ -4847,8 +6970,6 @@ static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args struct nfs4_channel_attrs *sent = &args->fc_attrs; struct nfs4_channel_attrs *rcvd = &session->fc_attrs; - if (rcvd->headerpadsz > sent->headerpadsz) - return -EINVAL; if (rcvd->max_resp_sz > sent->max_resp_sz) return -EINVAL; /* @@ -4861,6 +6982,8 @@ static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args return -EINVAL; if (rcvd->max_reqs == 0) return -EINVAL; + if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) + rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; return 0; } @@ -4876,9 +6999,9 @@ static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) return -EINVAL; /* These would render the backchannel useless: */ - if (rcvd->max_ops == 0) + if (rcvd->max_ops != sent->max_ops) return -EINVAL; - if (rcvd->max_reqs == 0) + if (rcvd->max_reqs != sent->max_reqs) return -EINVAL; return 0; } @@ -4894,7 +7017,8 @@ static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, return nfs4_verify_back_channel_attrs(args, session); } -static int _nfs4_proc_create_session(struct nfs_client *clp) +static int _nfs4_proc_create_session(struct nfs_client *clp, + struct rpc_cred *cred) { struct nfs4_session *session = clp->cl_session; struct nfs41_create_session_args args = { @@ -4908,18 +7032,19 @@ static int _nfs4_proc_create_session(struct nfs_client *clp) .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], .rpc_argp = &args, .rpc_resp = &res, + .rpc_cred = cred, }; int status; nfs4_init_channel_attrs(&args); args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); - status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); + status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_create_session(clp, status); - if (!status) + if (!status) { /* Verify the session's negotiated channel_attrs values */ status = nfs4_verify_channel_attrs(&args, session); - if (!status) { /* Increment the clientid slot sequence id */ clp->cl_seqid++; } @@ -4932,7 +7057,7 @@ static int _nfs4_proc_create_session(struct nfs_client *clp) * It is the responsibility of the caller to verify the session is * expired before calling this routine. */ -int nfs4_proc_create_session(struct nfs_client *clp) +int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) { int status; unsigned *ptr; @@ -4940,17 +7065,13 @@ int nfs4_proc_create_session(struct nfs_client *clp) dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); - status = _nfs4_proc_create_session(clp); + status = _nfs4_proc_create_session(clp, cred); if (status) goto out; - /* Init and reset the fore channel */ - status = nfs4_init_slot_tables(session); - dprintk("slot table initialization returned %d\n", status); - if (status) - goto out; - status = nfs4_reset_slot_tables(session); - dprintk("slot table reset returned %d\n", status); + /* Init or reset the session slot tables */ + status = nfs4_setup_session_slot_tables(session); + dprintk("slot table setup returned %d\n", status); if (status) goto out; @@ -4966,10 +7087,15 @@ out: * Issue the over-the-wire RPC DESTROY_SESSION. * The caller must serialize access to this routine. */ -int nfs4_proc_destroy_session(struct nfs4_session *session) +int nfs4_proc_destroy_session(struct nfs4_session *session, + struct rpc_cred *cred) { + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], + .rpc_argp = session, + .rpc_cred = cred, + }; int status = 0; - struct rpc_message msg; dprintk("--> nfs4_proc_destroy_session\n"); @@ -4977,51 +7103,17 @@ int nfs4_proc_destroy_session(struct nfs4_session *session) if (session->clp->cl_cons_state != NFS_CS_READY) return status; - msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; - msg.rpc_argp = session; - msg.rpc_resp = NULL; - msg.rpc_cred = NULL; - status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); + status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); + trace_nfs4_destroy_session(session->clp, status); if (status) - printk(KERN_WARNING - "Got error %d from the server on DESTROY_SESSION. " + dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " "Session has been destroyed regardless...\n", status); dprintk("<-- nfs4_proc_destroy_session\n"); return status; } -int nfs4_init_session(struct nfs_server *server) -{ - struct nfs_client *clp = server->nfs_client; - struct nfs4_session *session; - unsigned int rsize, wsize; - int ret; - - if (!nfs4_has_session(clp)) - return 0; - - session = clp->cl_session; - if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) - return 0; - - rsize = server->rsize; - if (rsize == 0) - rsize = NFS_MAX_FILE_IO_SIZE; - wsize = server->wsize; - if (wsize == 0) - wsize = NFS_MAX_FILE_IO_SIZE; - - session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; - session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; - - ret = nfs4_recover_expired_lease(server); - if (!ret) - ret = nfs4_check_client_ready(clp); - return ret; -} - /* * Renew the cl_session lease. */ @@ -5049,7 +7141,7 @@ static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client rpc_delay(task, NFS4_POLL_RETRY_MAX); return -EAGAIN; default: - nfs4_schedule_state_recovery(clp); + nfs4_schedule_lease_recovery(clp); } return 0; } @@ -5062,6 +7154,7 @@ static void nfs41_sequence_call_done(struct rpc_task *task, void *data) if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) return; + trace_nfs4_sequence(clp, task->tk_status); if (task->tk_status < 0) { dprintk("%s ERROR %d\n", __func__, task->tk_status); if (atomic_read(&clp->cl_count) == 1) @@ -5087,9 +7180,7 @@ static void nfs41_sequence_prepare(struct rpc_task *task, void *data) args = task->tk_msg.rpc_argp; res = task->tk_msg.rpc_resp; - if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) - return; - rpc_call_start(task); + nfs41_setup_sequence(clp->cl_session, args, res, task); } static const struct rpc_call_ops nfs41_sequence_ops = { @@ -5098,7 +7189,9 @@ static const struct rpc_call_ops nfs41_sequence_ops = { .rpc_release = nfs41_sequence_release, }; -static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) +static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, + struct rpc_cred *cred, + bool is_privileged) { struct nfs4_sequence_data *calldata; struct rpc_message msg = { @@ -5109,7 +7202,7 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_ .rpc_client = clp->cl_rpcclient, .rpc_message = &msg, .callback_ops = &nfs41_sequence_ops, - .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, + .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, }; if (!atomic_inc_not_zero(&clp->cl_count)) @@ -5119,6 +7212,9 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_ nfs_put_client(clp); return ERR_PTR(-ENOMEM); } + nfs4_init_sequence(&calldata->args, &calldata->res, 0); + if (is_privileged) + nfs4_set_sequence_privileged(&calldata->args); msg.rpc_argp = &calldata->args; msg.rpc_resp = &calldata->res; calldata->clp = clp; @@ -5127,16 +7223,18 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_ return rpc_run_task(&task_setup_data); } -static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred) +static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) { struct rpc_task *task; int ret = 0; - task = _nfs41_proc_sequence(clp, cred); + if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) + return 0; + task = _nfs41_proc_sequence(clp, cred, false); if (IS_ERR(task)) ret = PTR_ERR(task); else - rpc_put_task(task); + rpc_put_task_async(task); dprintk("<-- %s status=%d\n", __func__, ret); return ret; } @@ -5146,14 +7244,19 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) struct rpc_task *task; int ret; - task = _nfs41_proc_sequence(clp, cred); + task = _nfs41_proc_sequence(clp, cred, true); if (IS_ERR(task)) { ret = PTR_ERR(task); goto out; } ret = rpc_wait_for_completion_task(task); - if (!ret) + if (!ret) { + struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; + + if (task->tk_status == 0) + nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); ret = task->tk_status; + } rpc_put_task(task); out: dprintk("<-- %s status=%d\n", __func__, ret); @@ -5170,13 +7273,10 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) { struct nfs4_reclaim_complete_data *calldata = data; - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - if (nfs41_setup_sequence(calldata->clp->cl_session, - &calldata->arg.seq_args, - &calldata->res.seq_res, 0, task)) - return; - - rpc_call_start(task); + nfs41_setup_sequence(calldata->clp->cl_session, + &calldata->arg.seq_args, + &calldata->res.seq_res, + task); } static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) @@ -5188,9 +7288,11 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf break; case -NFS4ERR_DELAY: rpc_delay(task, NFS4_POLL_RETRY_MAX); + /* fall through */ + case -NFS4ERR_RETRY_UNCACHED_REP: return -EAGAIN; default: - nfs4_schedule_state_recovery(clp); + nfs4_schedule_lease_recovery(clp); } return 0; } @@ -5205,6 +7307,7 @@ static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) if (!nfs41_sequence_done(task, res)) return; + trace_nfs4_reclaim_complete(clp, task->tk_status); if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { rpc_restart_call_prepare(task); return; @@ -5228,12 +7331,14 @@ static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { /* * Issue a global reclaim complete. */ -static int nfs41_proc_reclaim_complete(struct nfs_client *clp) +static int nfs41_proc_reclaim_complete(struct nfs_client *clp, + struct rpc_cred *cred) { struct nfs4_reclaim_complete_data *calldata; struct rpc_task *task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], + .rpc_cred = cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = clp->cl_rpcclient, @@ -5250,6 +7355,8 @@ static int nfs41_proc_reclaim_complete(struct nfs_client *clp) calldata->clp = clp; calldata->arg.one_fs = 0; + nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); + nfs4_set_sequence_privileged(&calldata->arg.seq_args); msg.rpc_argp = &calldata->arg; msg.rpc_resp = &calldata->res; task_setup_data.callback_data = calldata; @@ -5258,6 +7365,9 @@ static int nfs41_proc_reclaim_complete(struct nfs_client *clp) status = PTR_ERR(task); goto out; } + status = nfs4_wait_for_completion_rpc_task(task); + if (status == 0) + status = task->tk_status; rpc_put_task(task); return 0; out: @@ -5269,51 +7379,153 @@ static void nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) { struct nfs4_layoutget *lgp = calldata; - struct inode *ino = lgp->args.inode; - struct nfs_server *server = NFS_SERVER(ino); + struct nfs_server *server = NFS_SERVER(lgp->args.inode); + struct nfs4_session *session = nfs4_get_session(server); dprintk("--> %s\n", __func__); - if (nfs4_setup_sequence(server, &lgp->args.seq_args, - &lgp->res.seq_res, 0, task)) + /* Note the is a race here, where a CB_LAYOUTRECALL can come in + * right now covering the LAYOUTGET we are about to send. + * However, that is not so catastrophic, and there seems + * to be no way to prevent it completely. + */ + if (nfs41_setup_sequence(session, &lgp->args.seq_args, + &lgp->res.seq_res, task)) return; - rpc_call_start(task); + if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, + NFS_I(lgp->args.inode)->layout, + lgp->args.ctx->state)) { + rpc_exit(task, NFS4_OK); + } } static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) { struct nfs4_layoutget *lgp = calldata; - struct nfs_server *server = NFS_SERVER(lgp->args.inode); + struct inode *inode = lgp->args.inode; + struct nfs_server *server = NFS_SERVER(inode); + struct pnfs_layout_hdr *lo; + struct nfs4_state *state = NULL; + unsigned long timeo, now, giveup; - dprintk("--> %s\n", __func__); + dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); - if (!nfs4_sequence_done(task, &lgp->res.seq_res)) - return; + if (!nfs41_sequence_done(task, &lgp->res.seq_res)) + goto out; switch (task->tk_status) { case 0: - break; + goto out; + /* + * NFS4ERR_LAYOUTTRYLATER is a conflict with another client + * (or clients) writing to the same RAID stripe + */ case -NFS4ERR_LAYOUTTRYLATER: + /* + * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall + * existing layout before getting a new one). + */ case -NFS4ERR_RECALLCONFLICT: - task->tk_status = -NFS4ERR_DELAY; - /* Fall through */ - default: - if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { + timeo = rpc_get_timeout(task->tk_client); + giveup = lgp->args.timestamp + timeo; + now = jiffies; + if (time_after(giveup, now)) { + unsigned long delay; + + /* Delay for: + * - Not less then NFS4_POLL_RETRY_MIN. + * - One last time a jiffie before we give up + * - exponential backoff (time_now minus start_attempt) + */ + delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN, + min((giveup - now - 1), + now - lgp->args.timestamp)); + + dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n", + __func__, delay); + rpc_delay(task, delay); + task->tk_status = 0; rpc_restart_call_prepare(task); - return; + goto out; /* Do not call nfs4_async_handle_error() */ + } + break; + case -NFS4ERR_EXPIRED: + case -NFS4ERR_BAD_STATEID: + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (!lo || list_empty(&lo->plh_segs)) { + spin_unlock(&inode->i_lock); + /* If the open stateid was bad, then recover it. */ + state = lgp->args.ctx->state; + } else { + LIST_HEAD(head); + + pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); + spin_unlock(&inode->i_lock); + /* Mark the bad layout state as invalid, then + * retry using the open stateid. */ + pnfs_free_lseg_list(&head); } } - lgp->status = task->tk_status; + if (nfs4_async_handle_error(task, server, state) == -EAGAIN) + rpc_restart_call_prepare(task); +out: dprintk("<-- %s\n", __func__); } +static size_t max_response_pages(struct nfs_server *server) +{ + u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; + return nfs_page_array_len(0, max_resp_sz); +} + +static void nfs4_free_pages(struct page **pages, size_t size) +{ + int i; + + if (!pages) + return; + + for (i = 0; i < size; i++) { + if (!pages[i]) + break; + __free_page(pages[i]); + } + kfree(pages); +} + +static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) +{ + struct page **pages; + int i; + + pages = kcalloc(size, sizeof(struct page *), gfp_flags); + if (!pages) { + dprintk("%s: can't alloc array of %zu pages\n", __func__, size); + return NULL; + } + + for (i = 0; i < size; i++) { + pages[i] = alloc_page(gfp_flags); + if (!pages[i]) { + dprintk("%s: failed to allocate page\n", __func__); + nfs4_free_pages(pages, size); + return NULL; + } + } + + return pages; +} + static void nfs4_layoutget_release(void *calldata) { struct nfs4_layoutget *lgp = calldata; + struct inode *inode = lgp->args.inode; + struct nfs_server *server = NFS_SERVER(inode); + size_t max_pages = max_response_pages(server); dprintk("--> %s\n", __func__); - put_layout_hdr(lgp->args.inode); - if (lgp->res.layout.buf != NULL) - free_page((unsigned long) lgp->res.layout.buf); + nfs4_free_pages(lgp->args.layout.pages, max_pages); + pnfs_put_layout_hdr(NFS_I(inode)->layout); put_nfs_open_context(lgp->args.ctx); kfree(calldata); dprintk("<-- %s\n", __func__); @@ -5325,14 +7537,18 @@ static const struct rpc_call_ops nfs4_layoutget_call_ops = { .rpc_release = nfs4_layoutget_release, }; -int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) +struct pnfs_layout_segment * +nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) { - struct nfs_server *server = NFS_SERVER(lgp->args.inode); + struct inode *inode = lgp->args.inode; + struct nfs_server *server = NFS_SERVER(inode); + size_t max_pages = max_response_pages(server); struct rpc_task *task; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], .rpc_argp = &lgp->args, .rpc_resp = &lgp->res, + .rpc_cred = lgp->cred, }; struct rpc_task_setup task_setup_data = { .rpc_client = server->client, @@ -5341,35 +7557,186 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) .callback_data = lgp, .flags = RPC_TASK_ASYNC, }; + struct pnfs_layout_segment *lseg = NULL; int status = 0; dprintk("--> %s\n", __func__); - lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS); - if (lgp->res.layout.buf == NULL) { + lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); + if (!lgp->args.layout.pages) { nfs4_layoutget_release(lgp); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } + lgp->args.layout.pglen = max_pages * PAGE_SIZE; + lgp->args.timestamp = jiffies; + lgp->res.layoutp = &lgp->args.layout; lgp->res.seq_res.sr_slot = NULL; + nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); + + /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ + pnfs_get_layout_hdr(NFS_I(inode)->layout); + task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) - return PTR_ERR(task); + return ERR_CAST(task); status = nfs4_wait_for_completion_rpc_task(task); - if (status != 0) - goto out; - status = lgp->status; - if (status != 0) - goto out; - status = pnfs_layout_process(lgp); -out: + if (status == 0) + status = task->tk_status; + trace_nfs4_layoutget(lgp->args.ctx, + &lgp->args.range, + &lgp->res.range, + status); + /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ + if (status == 0 && lgp->res.layoutp->len) + lseg = pnfs_layout_process(lgp); rpc_put_task(task); dprintk("<-- %s status=%d\n", __func__, status); + if (status) + return ERR_PTR(status); + return lseg; +} + +static void +nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs4_layoutreturn *lrp = calldata; + + dprintk("--> %s\n", __func__); + nfs41_setup_sequence(lrp->clp->cl_session, + &lrp->args.seq_args, + &lrp->res.seq_res, + task); +} + +static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) +{ + struct nfs4_layoutreturn *lrp = calldata; + struct nfs_server *server; + + dprintk("--> %s\n", __func__); + + if (!nfs41_sequence_done(task, &lrp->res.seq_res)) + return; + + server = NFS_SERVER(lrp->args.inode); + switch (task->tk_status) { + default: + task->tk_status = 0; + case 0: + break; + case -NFS4ERR_DELAY: + if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN) + break; + rpc_restart_call_prepare(task); + return; + } + dprintk("<-- %s\n", __func__); +} + +static void nfs4_layoutreturn_release(void *calldata) +{ + struct nfs4_layoutreturn *lrp = calldata; + struct pnfs_layout_hdr *lo = lrp->args.layout; + + dprintk("--> %s\n", __func__); + spin_lock(&lo->plh_inode->i_lock); + if (lrp->res.lrs_present) + pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); + lo->plh_block_lgets--; + spin_unlock(&lo->plh_inode->i_lock); + pnfs_put_layout_hdr(lrp->args.layout); + kfree(calldata); + dprintk("<-- %s\n", __func__); +} + +static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { + .rpc_call_prepare = nfs4_layoutreturn_prepare, + .rpc_call_done = nfs4_layoutreturn_done, + .rpc_release = nfs4_layoutreturn_release, +}; + +int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) +{ + struct rpc_task *task; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], + .rpc_argp = &lrp->args, + .rpc_resp = &lrp->res, + .rpc_cred = lrp->cred, + }; + struct rpc_task_setup task_setup_data = { + .rpc_client = NFS_SERVER(lrp->args.inode)->client, + .rpc_message = &msg, + .callback_ops = &nfs4_layoutreturn_call_ops, + .callback_data = lrp, + }; + int status; + + dprintk("--> %s\n", __func__); + nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) + return PTR_ERR(task); + status = task->tk_status; + trace_nfs4_layoutreturn(lrp->args.inode, status); + dprintk("<-- %s status=%d\n", __func__, status); + rpc_put_task(task); return status; } +/* + * Retrieve the list of Data Server devices from the MDS. + */ +static int _nfs4_getdevicelist(struct nfs_server *server, + const struct nfs_fh *fh, + struct pnfs_devicelist *devlist) +{ + struct nfs4_getdevicelist_args args = { + .fh = fh, + .layoutclass = server->pnfs_curr_ld->id, + }; + struct nfs4_getdevicelist_res res = { + .devlist = devlist, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], + .rpc_argp = &args, + .rpc_resp = &res, + }; + int status; + + dprintk("--> %s\n", __func__); + status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, + &res.seq_res, 0); + dprintk("<-- %s status=%d\n", __func__, status); + return status; +} + +int nfs4_proc_getdevicelist(struct nfs_server *server, + const struct nfs_fh *fh, + struct pnfs_devicelist *devlist) +{ + struct nfs4_exception exception = { }; + int err; + + do { + err = nfs4_handle_exception(server, + _nfs4_getdevicelist(server, fh, devlist), + &exception); + } while (exception.retry); + + dprintk("%s: err=%d, num_devs=%u\n", __func__, + err, devlist->num_devs); + + return err; +} +EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); + static int -_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) +_nfs4_proc_getdeviceinfo(struct nfs_server *server, + struct pnfs_device *pdev, + struct rpc_cred *cred) { struct nfs4_getdeviceinfo_args args = { .pdev = pdev, @@ -5381,101 +7748,596 @@ _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], .rpc_argp = &args, .rpc_resp = &res, + .rpc_cred = cred, }; int status; dprintk("--> %s\n", __func__); - status = nfs4_call_sync(server, &msg, &args, &res, 0); + status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); dprintk("<-- %s status=%d\n", __func__, status); return status; } -int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) +int nfs4_proc_getdeviceinfo(struct nfs_server *server, + struct pnfs_device *pdev, + struct rpc_cred *cred) { struct nfs4_exception exception = { }; int err; do { err = nfs4_handle_exception(server, - _nfs4_proc_getdeviceinfo(server, pdev), + _nfs4_proc_getdeviceinfo(server, pdev, cred), &exception); } while (exception.retry); return err; } EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); +static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs4_layoutcommit_data *data = calldata; + struct nfs_server *server = NFS_SERVER(data->args.inode); + struct nfs4_session *session = nfs4_get_session(server); + + nfs41_setup_sequence(session, + &data->args.seq_args, + &data->res.seq_res, + task); +} + +static void +nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) +{ + struct nfs4_layoutcommit_data *data = calldata; + struct nfs_server *server = NFS_SERVER(data->args.inode); + + if (!nfs41_sequence_done(task, &data->res.seq_res)) + return; + + switch (task->tk_status) { /* Just ignore these failures */ + case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ + case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ + case -NFS4ERR_BADLAYOUT: /* no layout */ + case -NFS4ERR_GRACE: /* loca_recalim always false */ + task->tk_status = 0; + case 0: + break; + default: + if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { + rpc_restart_call_prepare(task); + return; + } + } +} + +static void nfs4_layoutcommit_release(void *calldata) +{ + struct nfs4_layoutcommit_data *data = calldata; + + pnfs_cleanup_layoutcommit(data); + nfs_post_op_update_inode_force_wcc(data->args.inode, + data->res.fattr); + put_rpccred(data->cred); + kfree(data); +} + +static const struct rpc_call_ops nfs4_layoutcommit_ops = { + .rpc_call_prepare = nfs4_layoutcommit_prepare, + .rpc_call_done = nfs4_layoutcommit_done, + .rpc_release = nfs4_layoutcommit_release, +}; + +int +nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], + .rpc_argp = &data->args, + .rpc_resp = &data->res, + .rpc_cred = data->cred, + }; + struct rpc_task_setup task_setup_data = { + .task = &data->task, + .rpc_client = NFS_CLIENT(data->args.inode), + .rpc_message = &msg, + .callback_ops = &nfs4_layoutcommit_ops, + .callback_data = data, + .flags = RPC_TASK_ASYNC, + }; + struct rpc_task *task; + int status = 0; + + dprintk("NFS: %4d initiating layoutcommit call. sync %d " + "lbw: %llu inode %lu\n", + data->task.tk_pid, sync, + data->args.lastbytewritten, + data->args.inode->i_ino); + + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) + return PTR_ERR(task); + if (sync == false) + goto out; + status = nfs4_wait_for_completion_rpc_task(task); + if (status != 0) + goto out; + status = task->tk_status; + trace_nfs4_layoutcommit(data->args.inode, status); +out: + dprintk("%s: status %d\n", __func__, status); + rpc_put_task(task); + return status; +} + +/** + * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if + * possible) as per RFC3530bis and RFC5661 Security Considerations sections + */ +static int +_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info, + struct nfs4_secinfo_flavors *flavors, bool use_integrity) +{ + struct nfs41_secinfo_no_name_args args = { + .style = SECINFO_STYLE_CURRENT_FH, + }; + struct nfs4_secinfo_res res = { + .flavors = flavors, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], + .rpc_argp = &args, + .rpc_resp = &res, + }; + struct rpc_clnt *clnt = server->client; + struct rpc_cred *cred = NULL; + int status; + + if (use_integrity) { + clnt = server->nfs_client->cl_rpcclient; + cred = nfs4_get_clid_cred(server->nfs_client); + msg.rpc_cred = cred; + } + + dprintk("--> %s\n", __func__); + status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, + &res.seq_res, 0); + dprintk("<-- %s status=%d\n", __func__, status); + + if (cred) + put_rpccred(cred); + + return status; +} + +static int +nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) +{ + struct nfs4_exception exception = { }; + int err; + do { + /* first try using integrity protection */ + err = -NFS4ERR_WRONGSEC; + + /* try to use integrity protection with machine cred */ + if (_nfs4_is_integrity_protected(server->nfs_client)) + err = _nfs41_proc_secinfo_no_name(server, fhandle, info, + flavors, true); + + /* + * if unable to use integrity protection, or SECINFO with + * integrity protection returns NFS4ERR_WRONGSEC (which is + * disallowed by spec, but exists in deployed servers) use + * the current filesystem's rpc_client and the user cred. + */ + if (err == -NFS4ERR_WRONGSEC) + err = _nfs41_proc_secinfo_no_name(server, fhandle, info, + flavors, false); + + switch (err) { + case 0: + case -NFS4ERR_WRONGSEC: + case -ENOTSUPP: + goto out; + default: + err = nfs4_handle_exception(server, err, &exception); + } + } while (exception.retry); +out: + return err; +} + +static int +nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + int err; + struct page *page; + rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; + struct nfs4_secinfo_flavors *flavors; + struct nfs4_secinfo4 *secinfo; + int i; + + page = alloc_page(GFP_KERNEL); + if (!page) { + err = -ENOMEM; + goto out; + } + + flavors = page_address(page); + err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); + + /* + * Fall back on "guess and check" method if + * the server doesn't support SECINFO_NO_NAME + */ + if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { + err = nfs4_find_root_sec(server, fhandle, info); + goto out_freepage; + } + if (err) + goto out_freepage; + + for (i = 0; i < flavors->num_flavors; i++) { + secinfo = &flavors->flavors[i]; + + switch (secinfo->flavor) { + case RPC_AUTH_NULL: + case RPC_AUTH_UNIX: + case RPC_AUTH_GSS: + flavor = rpcauth_get_pseudoflavor(secinfo->flavor, + &secinfo->flavor_info); + break; + default: + flavor = RPC_AUTH_MAXFLAVOR; + break; + } + + if (!nfs_auth_info_match(&server->auth_info, flavor)) + flavor = RPC_AUTH_MAXFLAVOR; + + if (flavor != RPC_AUTH_MAXFLAVOR) { + err = nfs4_lookup_root_sec(server, fhandle, + info, flavor); + if (!err) + break; + } + } + + if (flavor == RPC_AUTH_MAXFLAVOR) + err = -EPERM; + +out_freepage: + put_page(page); + if (err == -EACCES) + return -EPERM; +out: + return err; +} + +static int _nfs41_test_stateid(struct nfs_server *server, + nfs4_stateid *stateid, + struct rpc_cred *cred) +{ + int status; + struct nfs41_test_stateid_args args = { + .stateid = stateid, + }; + struct nfs41_test_stateid_res res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], + .rpc_argp = &args, + .rpc_resp = &res, + .rpc_cred = cred, + }; + struct rpc_clnt *rpc_client = server->client; + + nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, + &rpc_client, &msg); + + dprintk("NFS call test_stateid %p\n", stateid); + nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(rpc_client, server, &msg, + &args.seq_args, &res.seq_res); + if (status != NFS_OK) { + dprintk("NFS reply test_stateid: failed, %d\n", status); + return status; + } + dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); + return -res.status; +} + +/** + * nfs41_test_stateid - perform a TEST_STATEID operation + * + * @server: server / transport on which to perform the operation + * @stateid: state ID to test + * @cred: credential + * + * Returns NFS_OK if the server recognizes that "stateid" is valid. + * Otherwise a negative NFS4ERR value is returned if the operation + * failed or the state ID is not currently valid. + */ +static int nfs41_test_stateid(struct nfs_server *server, + nfs4_stateid *stateid, + struct rpc_cred *cred) +{ + struct nfs4_exception exception = { }; + int err; + do { + err = _nfs41_test_stateid(server, stateid, cred); + if (err != -NFS4ERR_DELAY) + break; + nfs4_handle_exception(server, err, &exception); + } while (exception.retry); + return err; +} + +struct nfs_free_stateid_data { + struct nfs_server *server; + struct nfs41_free_stateid_args args; + struct nfs41_free_stateid_res res; +}; + +static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs_free_stateid_data *data = calldata; + nfs41_setup_sequence(nfs4_get_session(data->server), + &data->args.seq_args, + &data->res.seq_res, + task); +} + +static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) +{ + struct nfs_free_stateid_data *data = calldata; + + nfs41_sequence_done(task, &data->res.seq_res); + + switch (task->tk_status) { + case -NFS4ERR_DELAY: + if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN) + rpc_restart_call_prepare(task); + } +} + +static void nfs41_free_stateid_release(void *calldata) +{ + kfree(calldata); +} + +static const struct rpc_call_ops nfs41_free_stateid_ops = { + .rpc_call_prepare = nfs41_free_stateid_prepare, + .rpc_call_done = nfs41_free_stateid_done, + .rpc_release = nfs41_free_stateid_release, +}; + +static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, + nfs4_stateid *stateid, + struct rpc_cred *cred, + bool privileged) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], + .rpc_cred = cred, + }; + struct rpc_task_setup task_setup = { + .rpc_client = server->client, + .rpc_message = &msg, + .callback_ops = &nfs41_free_stateid_ops, + .flags = RPC_TASK_ASYNC, + }; + struct nfs_free_stateid_data *data; + + nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, + &task_setup.rpc_client, &msg); + + dprintk("NFS call free_stateid %p\n", stateid); + data = kmalloc(sizeof(*data), GFP_NOFS); + if (!data) + return ERR_PTR(-ENOMEM); + data->server = server; + nfs4_stateid_copy(&data->args.stateid, stateid); + + task_setup.callback_data = data; + + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); + if (privileged) + nfs4_set_sequence_privileged(&data->args.seq_args); + + return rpc_run_task(&task_setup); +} + +/** + * nfs41_free_stateid - perform a FREE_STATEID operation + * + * @server: server / transport on which to perform the operation + * @stateid: state ID to release + * @cred: credential + * + * Returns NFS_OK if the server freed "stateid". Otherwise a + * negative NFS4ERR value is returned. + */ +static int nfs41_free_stateid(struct nfs_server *server, + nfs4_stateid *stateid, + struct rpc_cred *cred) +{ + struct rpc_task *task; + int ret; + + task = _nfs41_free_stateid(server, stateid, cred, true); + if (IS_ERR(task)) + return PTR_ERR(task); + ret = rpc_wait_for_completion_task(task); + if (!ret) + ret = task->tk_status; + rpc_put_task(task); + return ret; +} + +static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) +{ + struct rpc_task *task; + struct rpc_cred *cred = lsp->ls_state->owner->so_cred; + + task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); + nfs4_free_lock_state(server, lsp); + if (IS_ERR(task)) + return PTR_ERR(task); + rpc_put_task(task); + return 0; +} + +static bool nfs41_match_stateid(const nfs4_stateid *s1, + const nfs4_stateid *s2) +{ + if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) + return false; + + if (s1->seqid == s2->seqid) + return true; + if (s1->seqid == 0 || s2->seqid == 0) + return true; + + return false; +} + #endif /* CONFIG_NFS_V4_1 */ -struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { +static bool nfs4_match_stateid(const nfs4_stateid *s1, + const nfs4_stateid *s2) +{ + return nfs4_stateid_match(s1, s2); +} + + +static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, .recover_open = nfs4_open_reclaim, .recover_lock = nfs4_lock_reclaim, .establish_clid = nfs4_init_clientid, - .get_clid_cred = nfs4_get_setclientid_cred, + .detect_trunking = nfs40_discover_server_trunking, }; #if defined(CONFIG_NFS_V4_1) -struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { +static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, .recover_open = nfs4_open_reclaim, .recover_lock = nfs4_lock_reclaim, .establish_clid = nfs41_init_clientid, - .get_clid_cred = nfs4_get_exchange_id_cred, .reclaim_complete = nfs41_proc_reclaim_complete, + .detect_trunking = nfs41_discover_server_trunking, }; #endif /* CONFIG_NFS_V4_1 */ -struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { +static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, .recover_open = nfs4_open_expired, .recover_lock = nfs4_lock_expired, .establish_clid = nfs4_init_clientid, - .get_clid_cred = nfs4_get_setclientid_cred, }; #if defined(CONFIG_NFS_V4_1) -struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { +static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, - .recover_open = nfs4_open_expired, - .recover_lock = nfs4_lock_expired, + .recover_open = nfs41_open_expired, + .recover_lock = nfs41_lock_expired, .establish_clid = nfs41_init_clientid, - .get_clid_cred = nfs4_get_exchange_id_cred, }; #endif /* CONFIG_NFS_V4_1 */ -struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { +static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { .sched_state_renewal = nfs4_proc_async_renew, .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, .renew_lease = nfs4_proc_renew, }; #if defined(CONFIG_NFS_V4_1) -struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { +static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { .sched_state_renewal = nfs41_proc_async_sequence, .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, .renew_lease = nfs4_proc_sequence, }; #endif +static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { + .get_locations = _nfs40_proc_get_locations, + .fsid_present = _nfs40_proc_fsid_present, +}; + +#if defined(CONFIG_NFS_V4_1) +static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { + .get_locations = _nfs41_proc_get_locations, + .fsid_present = _nfs41_proc_fsid_present, +}; +#endif /* CONFIG_NFS_V4_1 */ + static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { .minor_version = 0, - .call_sync = _nfs4_call_sync, - .validate_stateid = nfs4_validate_delegation_stateid, + .init_caps = NFS_CAP_READDIRPLUS + | NFS_CAP_ATOMIC_OPEN + | NFS_CAP_CHANGE_ATTR + | NFS_CAP_POSIX_LOCK, + .init_client = nfs40_init_client, + .shutdown_client = nfs40_shutdown_client, + .match_stateid = nfs4_match_stateid, + .find_root_sec = nfs4_find_root_sec, + .free_lock_state = nfs4_release_lockowner, + .call_sync_ops = &nfs40_call_sync_ops, .reboot_recovery_ops = &nfs40_reboot_recovery_ops, .nograce_recovery_ops = &nfs40_nograce_recovery_ops, .state_renewal_ops = &nfs40_state_renewal_ops, + .mig_recovery_ops = &nfs40_mig_recovery_ops, }; #if defined(CONFIG_NFS_V4_1) static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { .minor_version = 1, - .call_sync = _nfs4_call_sync_session, - .validate_stateid = nfs41_validate_delegation_stateid, + .init_caps = NFS_CAP_READDIRPLUS + | NFS_CAP_ATOMIC_OPEN + | NFS_CAP_CHANGE_ATTR + | NFS_CAP_POSIX_LOCK + | NFS_CAP_STATEID_NFSV41 + | NFS_CAP_ATOMIC_OPEN_V1, + .init_client = nfs41_init_client, + .shutdown_client = nfs41_shutdown_client, + .match_stateid = nfs41_match_stateid, + .find_root_sec = nfs41_find_root_sec, + .free_lock_state = nfs41_free_lock_state, + .call_sync_ops = &nfs41_call_sync_ops, + .reboot_recovery_ops = &nfs41_reboot_recovery_ops, + .nograce_recovery_ops = &nfs41_nograce_recovery_ops, + .state_renewal_ops = &nfs41_state_renewal_ops, + .mig_recovery_ops = &nfs41_mig_recovery_ops, +}; +#endif + +#if defined(CONFIG_NFS_V4_2) +static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { + .minor_version = 2, + .init_caps = NFS_CAP_READDIRPLUS + | NFS_CAP_ATOMIC_OPEN + | NFS_CAP_CHANGE_ATTR + | NFS_CAP_POSIX_LOCK + | NFS_CAP_STATEID_NFSV41 + | NFS_CAP_ATOMIC_OPEN_V1, + .init_client = nfs41_init_client, + .shutdown_client = nfs41_shutdown_client, + .match_stateid = nfs41_match_stateid, + .find_root_sec = nfs41_find_root_sec, + .free_lock_state = nfs41_free_lock_state, + .call_sync_ops = &nfs41_call_sync_ops, .reboot_recovery_ops = &nfs41_reboot_recovery_ops, .nograce_recovery_ops = &nfs41_nograce_recovery_ops, .state_renewal_ops = &nfs41_state_renewal_ops, @@ -5487,15 +8349,39 @@ const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { #if defined(CONFIG_NFS_V4_1) [1] = &nfs_v4_1_minor_ops, #endif +#if defined(CONFIG_NFS_V4_2) + [2] = &nfs_v4_2_minor_ops, +#endif +}; + +static const struct inode_operations nfs4_dir_inode_operations = { + .create = nfs_create, + .lookup = nfs_lookup, + .atomic_open = nfs_atomic_open, + .link = nfs_link, + .unlink = nfs_unlink, + .symlink = nfs_symlink, + .mkdir = nfs_mkdir, + .rmdir = nfs_rmdir, + .mknod = nfs_mknod, + .rename = nfs_rename, + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .listxattr = generic_listxattr, + .removexattr = generic_removexattr, }; static const struct inode_operations nfs4_file_inode_operations = { .permission = nfs_permission, .getattr = nfs_getattr, .setattr = nfs_setattr, - .getxattr = nfs4_getxattr, - .setxattr = nfs4_setxattr, - .listxattr = nfs4_listxattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .listxattr = generic_listxattr, + .removexattr = generic_removexattr, }; const struct nfs_rpc_ops nfs_v4_clientops = { @@ -5503,19 +8389,22 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .dentry_ops = &nfs4_dentry_operations, .dir_inode_ops = &nfs4_dir_inode_operations, .file_inode_ops = &nfs4_file_inode_operations, + .file_ops = &nfs4_file_operations, .getroot = nfs4_proc_get_root, + .submount = nfs4_submount, + .try_mount = nfs4_try_mount, .getattr = nfs4_proc_getattr, .setattr = nfs4_proc_setattr, - .lookupfh = nfs4_proc_lookupfh, .lookup = nfs4_proc_lookup, .access = nfs4_proc_access, .readlink = nfs4_proc_readlink, .create = nfs4_proc_create, .remove = nfs4_proc_remove, .unlink_setup = nfs4_proc_unlink_setup, + .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, .unlink_done = nfs4_proc_unlink_done, - .rename = nfs4_proc_rename, .rename_setup = nfs4_proc_rename_setup, + .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, .rename_done = nfs4_proc_rename_done, .link = nfs4_proc_link, .symlink = nfs4_proc_symlink, @@ -5528,16 +8417,40 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .pathconf = nfs4_proc_pathconf, .set_capabilities = nfs4_server_capabilities, .decode_dirent = nfs4_decode_dirent, + .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, .read_setup = nfs4_proc_read_setup, .read_done = nfs4_read_done, .write_setup = nfs4_proc_write_setup, .write_done = nfs4_write_done, .commit_setup = nfs4_proc_commit_setup, + .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, .commit_done = nfs4_commit_done, .lock = nfs4_proc_lock, .clear_acl_cache = nfs4_zap_acl_attr, .close_context = nfs4_close_context, .open_context = nfs4_atomic_open, + .have_delegation = nfs4_have_delegation, + .return_delegation = nfs4_inode_return_delegation, + .alloc_client = nfs4_alloc_client, + .init_client = nfs4_init_client, + .free_client = nfs4_free_client, + .create_server = nfs4_create_server, + .clone_server = nfs_clone_server, +}; + +static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { + .prefix = XATTR_NAME_NFSV4_ACL, + .list = nfs4_xattr_list_nfs4_acl, + .get = nfs4_xattr_get_nfs4_acl, + .set = nfs4_xattr_set_nfs4_acl, +}; + +const struct xattr_handler *nfs4_xattr_handlers[] = { + &nfs4_xattr_nfs4_acl_handler, +#ifdef CONFIG_NFS_V4_SECURITY_LABEL + &nfs4_xattr_nfs4_label_handler, +#endif + NULL }; /* diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c index 72b6c580af1..1720d32ffa5 100644 --- a/fs/nfs/nfs4renewd.c +++ b/fs/nfs/nfs4renewd.c @@ -49,7 +49,7 @@ #include "nfs4_fs.h" #include "delegation.h" -#define NFSDBG_FACILITY NFSDBG_PROC +#define NFSDBG_FACILITY NFSDBG_STATE void nfs4_renew_state(struct work_struct *work) @@ -60,29 +60,36 @@ nfs4_renew_state(struct work_struct *work) struct rpc_cred *cred; long lease; unsigned long last, now; + unsigned renew_flags = 0; ops = clp->cl_mvops->state_renewal_ops; dprintk("%s: start\n", __func__); - /* Are there any active superblocks? */ - if (list_empty(&clp->cl_superblocks)) + + if (test_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state)) goto out; + spin_lock(&clp->cl_lock); lease = clp->cl_lease_time; last = clp->cl_last_renewal; now = jiffies; /* Are we close to a lease timeout? */ - if (time_after(now, last + lease/3)) { + if (time_after(now, last + lease/3)) + renew_flags |= NFS4_RENEW_TIMEOUT; + if (nfs_delegations_present(clp)) + renew_flags |= NFS4_RENEW_DELEGATION_CB; + + if (renew_flags != 0) { cred = ops->get_state_renewal_cred_locked(clp); spin_unlock(&clp->cl_lock); if (cred == NULL) { - if (list_empty(&clp->cl_delegations)) { + if (!(renew_flags & NFS4_RENEW_DELEGATION_CB)) { set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); goto out; } nfs_expire_all_delegations(clp); } else { /* Queue an asynchronous RENEW. */ - ops->sched_state_renewal(clp, cred); + ops->sched_state_renewal(clp, cred, renew_flags); put_rpccred(cred); goto out_exp; } @@ -110,8 +117,7 @@ nfs4_schedule_state_renewal(struct nfs_client *clp) timeout = 5 * HZ; dprintk("%s: requeueing work. Lease period = %ld\n", __func__, (timeout + HZ - 1) / HZ); - cancel_delayed_work(&clp->cl_renewd); - schedule_delayed_work(&clp->cl_renewd, timeout); + mod_delayed_work(system_wq, &clp->cl_renewd, timeout); set_bit(NFS_CS_RENEWD, &clp->cl_res_state); spin_unlock(&clp->cl_lock); } diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c new file mode 100644 index 00000000000..e799dc3c3b1 --- /dev/null +++ b/fs/nfs/nfs4session.c @@ -0,0 +1,565 @@ +/* + * fs/nfs/nfs4session.c + * + * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com> + * + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/printk.h> +#include <linux/slab.h> +#include <linux/sunrpc/sched.h> +#include <linux/sunrpc/bc_xprt.h> +#include <linux/nfs.h> +#include <linux/nfs4.h> +#include <linux/nfs_fs.h> +#include <linux/module.h> + +#include "nfs4_fs.h" +#include "internal.h" +#include "nfs4session.h" +#include "callback.h" + +#define NFSDBG_FACILITY NFSDBG_STATE + +static void nfs4_init_slot_table(struct nfs4_slot_table *tbl, const char *queue) +{ + tbl->highest_used_slotid = NFS4_NO_SLOT; + spin_lock_init(&tbl->slot_tbl_lock); + rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, queue); + init_completion(&tbl->complete); +} + +/* + * nfs4_shrink_slot_table - free retired slots from the slot table + */ +static void nfs4_shrink_slot_table(struct nfs4_slot_table *tbl, u32 newsize) +{ + struct nfs4_slot **p; + if (newsize >= tbl->max_slots) + return; + + p = &tbl->slots; + while (newsize--) + p = &(*p)->next; + while (*p) { + struct nfs4_slot *slot = *p; + + *p = slot->next; + kfree(slot); + tbl->max_slots--; + } +} + +/** + * nfs4_slot_tbl_drain_complete - wake waiters when drain is complete + * @tbl - controlling slot table + * + */ +void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl) +{ + if (nfs4_slot_tbl_draining(tbl)) + complete(&tbl->complete); +} + +/* + * nfs4_free_slot - free a slot and efficiently update slot table. + * + * freeing a slot is trivially done by clearing its respective bit + * in the bitmap. + * If the freed slotid equals highest_used_slotid we want to update it + * so that the server would be able to size down the slot table if needed, + * otherwise we know that the highest_used_slotid is still in use. + * When updating highest_used_slotid there may be "holes" in the bitmap + * so we need to scan down from highest_used_slotid to 0 looking for the now + * highest slotid in use. + * If none found, highest_used_slotid is set to NFS4_NO_SLOT. + * + * Must be called while holding tbl->slot_tbl_lock + */ +void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot) +{ + u32 slotid = slot->slot_nr; + + /* clear used bit in bitmap */ + __clear_bit(slotid, tbl->used_slots); + + /* update highest_used_slotid when it is freed */ + if (slotid == tbl->highest_used_slotid) { + u32 new_max = find_last_bit(tbl->used_slots, slotid); + if (new_max < slotid) + tbl->highest_used_slotid = new_max; + else { + tbl->highest_used_slotid = NFS4_NO_SLOT; + nfs4_slot_tbl_drain_complete(tbl); + } + } + dprintk("%s: slotid %u highest_used_slotid %u\n", __func__, + slotid, tbl->highest_used_slotid); +} + +static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table *tbl, + u32 slotid, u32 seq_init, gfp_t gfp_mask) +{ + struct nfs4_slot *slot; + + slot = kzalloc(sizeof(*slot), gfp_mask); + if (slot) { + slot->table = tbl; + slot->slot_nr = slotid; + slot->seq_nr = seq_init; + } + return slot; +} + +static struct nfs4_slot *nfs4_find_or_create_slot(struct nfs4_slot_table *tbl, + u32 slotid, u32 seq_init, gfp_t gfp_mask) +{ + struct nfs4_slot **p, *slot; + + p = &tbl->slots; + for (;;) { + if (*p == NULL) { + *p = nfs4_new_slot(tbl, tbl->max_slots, + seq_init, gfp_mask); + if (*p == NULL) + break; + tbl->max_slots++; + } + slot = *p; + if (slot->slot_nr == slotid) + return slot; + p = &slot->next; + } + return ERR_PTR(-ENOMEM); +} + +/* + * nfs4_alloc_slot - efficiently look for a free slot + * + * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap. + * If found, we mark the slot as used, update the highest_used_slotid, + * and respectively set up the sequence operation args. + * + * Note: must be called with under the slot_tbl_lock. + */ +struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl) +{ + struct nfs4_slot *ret = ERR_PTR(-EBUSY); + u32 slotid; + + dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", + __func__, tbl->used_slots[0], tbl->highest_used_slotid, + tbl->max_slotid + 1); + slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1); + if (slotid > tbl->max_slotid) + goto out; + ret = nfs4_find_or_create_slot(tbl, slotid, 1, GFP_NOWAIT); + if (IS_ERR(ret)) + goto out; + __set_bit(slotid, tbl->used_slots); + if (slotid > tbl->highest_used_slotid || + tbl->highest_used_slotid == NFS4_NO_SLOT) + tbl->highest_used_slotid = slotid; + ret->generation = tbl->generation; + +out: + dprintk("<-- %s used_slots=%04lx highest_used=%u slotid=%u\n", + __func__, tbl->used_slots[0], tbl->highest_used_slotid, + !IS_ERR(ret) ? ret->slot_nr : NFS4_NO_SLOT); + return ret; +} + +static int nfs4_grow_slot_table(struct nfs4_slot_table *tbl, + u32 max_reqs, u32 ivalue) +{ + if (max_reqs <= tbl->max_slots) + return 0; + if (!IS_ERR(nfs4_find_or_create_slot(tbl, max_reqs - 1, ivalue, GFP_NOFS))) + return 0; + return -ENOMEM; +} + +static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl, + u32 server_highest_slotid, + u32 ivalue) +{ + struct nfs4_slot **p; + + nfs4_shrink_slot_table(tbl, server_highest_slotid + 1); + p = &tbl->slots; + while (*p) { + (*p)->seq_nr = ivalue; + (*p)->interrupted = 0; + p = &(*p)->next; + } + tbl->highest_used_slotid = NFS4_NO_SLOT; + tbl->target_highest_slotid = server_highest_slotid; + tbl->server_highest_slotid = server_highest_slotid; + tbl->d_target_highest_slotid = 0; + tbl->d2_target_highest_slotid = 0; + tbl->max_slotid = server_highest_slotid; +} + +/* + * (re)Initialise a slot table + */ +static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, + u32 max_reqs, u32 ivalue) +{ + int ret; + + dprintk("--> %s: max_reqs=%u, tbl->max_slots %u\n", __func__, + max_reqs, tbl->max_slots); + + if (max_reqs > NFS4_MAX_SLOT_TABLE) + max_reqs = NFS4_MAX_SLOT_TABLE; + + ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue); + if (ret) + goto out; + + spin_lock(&tbl->slot_tbl_lock); + nfs4_reset_slot_table(tbl, max_reqs - 1, ivalue); + spin_unlock(&tbl->slot_tbl_lock); + + dprintk("%s: tbl=%p slots=%p max_slots=%u\n", __func__, + tbl, tbl->slots, tbl->max_slots); +out: + dprintk("<-- %s: return %d\n", __func__, ret); + return ret; +} + +/* + * nfs4_release_slot_table - release all slot table entries + */ +static void nfs4_release_slot_table(struct nfs4_slot_table *tbl) +{ + nfs4_shrink_slot_table(tbl, 0); +} + +/** + * nfs4_shutdown_slot_table - release resources attached to a slot table + * @tbl: slot table to shut down + * + */ +void nfs4_shutdown_slot_table(struct nfs4_slot_table *tbl) +{ + nfs4_release_slot_table(tbl); + rpc_destroy_wait_queue(&tbl->slot_tbl_waitq); +} + +/** + * nfs4_setup_slot_table - prepare a stand-alone slot table for use + * @tbl: slot table to set up + * @max_reqs: maximum number of requests allowed + * @queue: name to give RPC wait queue + * + * Returns zero on success, or a negative errno. + */ +int nfs4_setup_slot_table(struct nfs4_slot_table *tbl, unsigned int max_reqs, + const char *queue) +{ + nfs4_init_slot_table(tbl, queue); + return nfs4_realloc_slot_table(tbl, max_reqs, 0); +} + +static bool nfs41_assign_slot(struct rpc_task *task, void *pslot) +{ + struct nfs4_sequence_args *args = task->tk_msg.rpc_argp; + struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; + struct nfs4_slot *slot = pslot; + struct nfs4_slot_table *tbl = slot->table; + + if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) + return false; + slot->generation = tbl->generation; + args->sa_slot = slot; + res->sr_timestamp = jiffies; + res->sr_slot = slot; + res->sr_status_flags = 0; + res->sr_status = 1; + return true; +} + +static bool __nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot) +{ + if (rpc_wake_up_first(&tbl->slot_tbl_waitq, nfs41_assign_slot, slot)) + return true; + return false; +} + +bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot) +{ + if (slot->slot_nr > tbl->max_slotid) + return false; + return __nfs41_wake_and_assign_slot(tbl, slot); +} + +static bool nfs41_try_wake_next_slot_table_entry(struct nfs4_slot_table *tbl) +{ + struct nfs4_slot *slot = nfs4_alloc_slot(tbl); + if (!IS_ERR(slot)) { + bool ret = __nfs41_wake_and_assign_slot(tbl, slot); + if (ret) + return ret; + nfs4_free_slot(tbl, slot); + } + return false; +} + +void nfs41_wake_slot_table(struct nfs4_slot_table *tbl) +{ + for (;;) { + if (!nfs41_try_wake_next_slot_table_entry(tbl)) + break; + } +} + +#if defined(CONFIG_NFS_V4_1) + +static void nfs41_set_max_slotid_locked(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + u32 max_slotid; + + max_slotid = min(NFS4_MAX_SLOT_TABLE - 1, target_highest_slotid); + if (max_slotid > tbl->server_highest_slotid) + max_slotid = tbl->server_highest_slotid; + if (max_slotid > tbl->target_highest_slotid) + max_slotid = tbl->target_highest_slotid; + tbl->max_slotid = max_slotid; + nfs41_wake_slot_table(tbl); +} + +/* Update the client's idea of target_highest_slotid */ +static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + if (tbl->target_highest_slotid == target_highest_slotid) + return; + tbl->target_highest_slotid = target_highest_slotid; + tbl->generation++; +} + +void nfs41_set_target_slotid(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + spin_lock(&tbl->slot_tbl_lock); + nfs41_set_target_slotid_locked(tbl, target_highest_slotid); + tbl->d_target_highest_slotid = 0; + tbl->d2_target_highest_slotid = 0; + nfs41_set_max_slotid_locked(tbl, target_highest_slotid); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl, + u32 highest_slotid) +{ + if (tbl->server_highest_slotid == highest_slotid) + return; + if (tbl->highest_used_slotid > highest_slotid) + return; + /* Deallocate slots */ + nfs4_shrink_slot_table(tbl, highest_slotid + 1); + tbl->server_highest_slotid = highest_slotid; +} + +static s32 nfs41_derivative_target_slotid(s32 s1, s32 s2) +{ + s1 -= s2; + if (s1 == 0) + return 0; + if (s1 < 0) + return (s1 - 1) >> 1; + return (s1 + 1) >> 1; +} + +static int nfs41_sign_s32(s32 s1) +{ + if (s1 > 0) + return 1; + if (s1 < 0) + return -1; + return 0; +} + +static bool nfs41_same_sign_or_zero_s32(s32 s1, s32 s2) +{ + if (!s1 || !s2) + return true; + return nfs41_sign_s32(s1) == nfs41_sign_s32(s2); +} + +/* Try to eliminate outliers by checking for sharp changes in the + * derivatives and second derivatives + */ +static bool nfs41_is_outlier_target_slotid(struct nfs4_slot_table *tbl, + u32 new_target) +{ + s32 d_target, d2_target; + bool ret = true; + + d_target = nfs41_derivative_target_slotid(new_target, + tbl->target_highest_slotid); + d2_target = nfs41_derivative_target_slotid(d_target, + tbl->d_target_highest_slotid); + /* Is first derivative same sign? */ + if (nfs41_same_sign_or_zero_s32(d_target, tbl->d_target_highest_slotid)) + ret = false; + /* Is second derivative same sign? */ + if (nfs41_same_sign_or_zero_s32(d2_target, tbl->d2_target_highest_slotid)) + ret = false; + tbl->d_target_highest_slotid = d_target; + tbl->d2_target_highest_slotid = d2_target; + return ret; +} + +void nfs41_update_target_slotid(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot, + struct nfs4_sequence_res *res) +{ + spin_lock(&tbl->slot_tbl_lock); + if (!nfs41_is_outlier_target_slotid(tbl, res->sr_target_highest_slotid)) + nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid); + if (tbl->generation == slot->generation) + nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid); + nfs41_set_max_slotid_locked(tbl, res->sr_target_highest_slotid); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs4_release_session_slot_tables(struct nfs4_session *session) +{ + nfs4_release_slot_table(&session->fc_slot_table); + nfs4_release_slot_table(&session->bc_slot_table); +} + +/* + * Initialize or reset the forechannel and backchannel tables + */ +int nfs4_setup_session_slot_tables(struct nfs4_session *ses) +{ + struct nfs4_slot_table *tbl; + int status; + + dprintk("--> %s\n", __func__); + /* Fore channel */ + tbl = &ses->fc_slot_table; + tbl->session = ses; + status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); + if (status) /* -ENOMEM */ + return status; + /* Back channel */ + tbl = &ses->bc_slot_table; + tbl->session = ses; + status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0); + if (status && tbl->slots == NULL) + /* Fore and back channel share a connection so get + * both slot tables or neither */ + nfs4_release_session_slot_tables(ses); + return status; +} + +struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) +{ + struct nfs4_session *session; + + session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); + if (!session) + return NULL; + + nfs4_init_slot_table(&session->fc_slot_table, "ForeChannel Slot table"); + nfs4_init_slot_table(&session->bc_slot_table, "BackChannel Slot table"); + session->session_state = 1<<NFS4_SESSION_INITING; + + session->clp = clp; + return session; +} + +static void nfs4_destroy_session_slot_tables(struct nfs4_session *session) +{ + nfs4_shutdown_slot_table(&session->fc_slot_table); + nfs4_shutdown_slot_table(&session->bc_slot_table); +} + +void nfs4_destroy_session(struct nfs4_session *session) +{ + struct rpc_xprt *xprt; + struct rpc_cred *cred; + + cred = nfs4_get_clid_cred(session->clp); + nfs4_proc_destroy_session(session, cred); + if (cred) + put_rpccred(cred); + + rcu_read_lock(); + xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt); + rcu_read_unlock(); + dprintk("%s Destroy backchannel for xprt %p\n", + __func__, xprt); + xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); + nfs4_destroy_session_slot_tables(session); + kfree(session); +} + +/* + * With sessions, the client is not marked ready until after a + * successful EXCHANGE_ID and CREATE_SESSION. + * + * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate + * other versions of NFS can be tried. + */ +static int nfs41_check_session_ready(struct nfs_client *clp) +{ + int ret; + + if (clp->cl_cons_state == NFS_CS_SESSION_INITING) { + ret = nfs4_client_recover_expired_lease(clp); + if (ret) + return ret; + } + if (clp->cl_cons_state < NFS_CS_READY) + return -EPROTONOSUPPORT; + smp_rmb(); + return 0; +} + +int nfs4_init_session(struct nfs_client *clp) +{ + if (!nfs4_has_session(clp)) + return 0; + + clear_bit(NFS4_SESSION_INITING, &clp->cl_session->session_state); + return nfs41_check_session_ready(clp); +} + +int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time) +{ + struct nfs4_session *session = clp->cl_session; + int ret; + + spin_lock(&clp->cl_lock); + if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { + /* + * Do not set NFS_CS_CHECK_LEASE_TIME instead set the + * DS lease to be equal to the MDS lease. + */ + clp->cl_lease_time = lease_time; + clp->cl_last_renewal = jiffies; + } + spin_unlock(&clp->cl_lock); + + ret = nfs41_check_session_ready(clp); + if (ret) + return ret; + /* Test for the DS role */ + if (!is_ds_client(clp)) + return -ENODEV; + return 0; +} +EXPORT_SYMBOL_GPL(nfs4_init_ds_session); + +#endif /* defined(CONFIG_NFS_V4_1) */ diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h new file mode 100644 index 00000000000..b34ada9bc6a --- /dev/null +++ b/fs/nfs/nfs4session.h @@ -0,0 +1,153 @@ +/* + * fs/nfs/nfs4session.h + * + * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com> + * + */ +#ifndef __LINUX_FS_NFS_NFS4SESSION_H +#define __LINUX_FS_NFS_NFS4SESSION_H + +/* maximum number of slots to use */ +#define NFS4_DEF_SLOT_TABLE_SIZE (64U) +#define NFS4_MAX_SLOT_TABLE (1024U) +#define NFS4_NO_SLOT ((u32)-1) + +#if IS_ENABLED(CONFIG_NFS_V4) + +/* Sessions slot seqid */ +struct nfs4_slot { + struct nfs4_slot_table *table; + struct nfs4_slot *next; + unsigned long generation; + u32 slot_nr; + u32 seq_nr; + unsigned int interrupted : 1; +}; + +/* Sessions */ +enum nfs4_slot_tbl_state { + NFS4_SLOT_TBL_DRAINING, +}; + +#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long)) +struct nfs4_slot_table { + struct nfs4_session *session; /* Parent session */ + struct nfs4_slot *slots; /* seqid per slot */ + unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ + spinlock_t slot_tbl_lock; + struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ + u32 max_slots; /* # slots in table */ + u32 max_slotid; /* Max allowed slotid value */ + u32 highest_used_slotid; /* sent to server on each SEQ. + * op for dynamic resizing */ + u32 target_highest_slotid; /* Server max_slot target */ + u32 server_highest_slotid; /* Server highest slotid */ + s32 d_target_highest_slotid; /* Derivative */ + s32 d2_target_highest_slotid; /* 2nd derivative */ + unsigned long generation; /* Generation counter for + target_highest_slotid */ + struct completion complete; + unsigned long slot_tbl_state; +}; + +/* + * Session related parameters + */ +struct nfs4_session { + struct nfs4_sessionid sess_id; + u32 flags; + unsigned long session_state; + u32 hash_alg; + u32 ssv_len; + + /* The fore and back channel */ + struct nfs4_channel_attrs fc_attrs; + struct nfs4_slot_table fc_slot_table; + struct nfs4_channel_attrs bc_attrs; + struct nfs4_slot_table bc_slot_table; + struct nfs_client *clp; +}; + +enum nfs4_session_state { + NFS4_SESSION_INITING, +}; + +extern int nfs4_setup_slot_table(struct nfs4_slot_table *tbl, + unsigned int max_reqs, const char *queue); +extern void nfs4_shutdown_slot_table(struct nfs4_slot_table *tbl); +extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl); +extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot); +extern void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl); +bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot); +void nfs41_wake_slot_table(struct nfs4_slot_table *tbl); + +static inline bool nfs4_slot_tbl_draining(struct nfs4_slot_table *tbl) +{ + return !!test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); +} + +#if defined(CONFIG_NFS_V4_1) +extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl, + u32 target_highest_slotid); +extern void nfs41_update_target_slotid(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot, + struct nfs4_sequence_res *res); + +extern int nfs4_setup_session_slot_tables(struct nfs4_session *ses); + +extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); +extern void nfs4_destroy_session(struct nfs4_session *session); +extern int nfs4_init_session(struct nfs_client *clp); +extern int nfs4_init_ds_session(struct nfs_client *, unsigned long); + +/* + * Determine if sessions are in use. + */ +static inline int nfs4_has_session(const struct nfs_client *clp) +{ + if (clp->cl_session) + return 1; + return 0; +} + +static inline int nfs4_has_persistent_session(const struct nfs_client *clp) +{ + if (nfs4_has_session(clp)) + return (clp->cl_session->flags & SESSION4_PERSIST); + return 0; +} + +#ifdef CONFIG_CRC32 +/* + * nfs_session_id_hash - calculate the crc32 hash for the session id + * @session - pointer to session + */ +#define nfs_session_id_hash(sess_id) \ + (~crc32_le(0xFFFFFFFF, &(sess_id)->data[0], sizeof((sess_id)->data))) +#else +#define nfs_session_id_hash(session) (0) +#endif +#else /* defined(CONFIG_NFS_V4_1) */ + +static inline int nfs4_init_session(struct nfs_client *clp) +{ + return 0; +} + +/* + * Determine if sessions are in use. + */ +static inline int nfs4_has_session(const struct nfs_client *clp) +{ + return 0; +} + +static inline int nfs4_has_persistent_session(const struct nfs_client *clp) +{ + return 0; +} + +#endif /* defined(CONFIG_NFS_V4_1) */ +#endif /* IS_ENABLED(CONFIG_NFS_V4) */ +#endif /* __LINUX_FS_NFS_NFS4SESSION_H */ diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index f575a312673..848f6853c59 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -49,41 +49,102 @@ #include <linux/ratelimit.h> #include <linux/workqueue.h> #include <linux/bitops.h> +#include <linux/jiffies.h> + +#include <linux/sunrpc/clnt.h> #include "nfs4_fs.h" #include "callback.h" #include "delegation.h" #include "internal.h" +#include "nfs4session.h" #include "pnfs.h" +#include "netns.h" + +#define NFSDBG_FACILITY NFSDBG_STATE #define OPENOWNER_POOL_SIZE 8 const nfs4_stateid zero_stateid; - -static LIST_HEAD(nfs4_clientid_list); +static DEFINE_MUTEX(nfs_clid_init_mutex); int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { - struct nfs4_setclientid_res clid; + struct nfs4_setclientid_res clid = { + .clientid = clp->cl_clientid, + .confirm = clp->cl_confirm, + }; unsigned short port; int status; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); - port = nfs_callback_tcpport; + if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) + goto do_confirm; + port = nn->nfs_callback_tcpport; if (clp->cl_addr.ss_family == AF_INET6) - port = nfs_callback_tcpport6; + port = nn->nfs_callback_tcpport6; status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); if (status != 0) goto out; + clp->cl_clientid = clid.clientid; + clp->cl_confirm = clid.confirm; + set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); +do_confirm: status = nfs4_proc_setclientid_confirm(clp, &clid, cred); if (status != 0) goto out; - clp->cl_clientid = clid.clientid; + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); nfs4_schedule_state_renewal(clp); out: return status; } +/** + * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) + * + * @clp: nfs_client under test + * @result: OUT: found nfs_client, or clp + * @cred: credential to use for trunking test + * + * Returns zero, a negative errno, or a negative NFS4ERR status. + * If zero is returned, an nfs_client pointer is planted in + * "result". + * + * Note: The returned client may not yet be marked ready. + */ +int nfs40_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **result, + struct rpc_cred *cred) +{ + struct nfs4_setclientid_res clid = { + .clientid = clp->cl_clientid, + .confirm = clp->cl_confirm, + }; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); + unsigned short port; + int status; + + port = nn->nfs_callback_tcpport; + if (clp->cl_addr.ss_family == AF_INET6) + port = nn->nfs_callback_tcpport6; + + status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); + if (status != 0) + goto out; + clp->cl_clientid = clid.clientid; + clp->cl_confirm = clid.confirm; + + status = nfs40_walk_client_list(clp, result, cred); + if (status == 0) { + /* Sustain the lease, even if it's empty. If the clientid4 + * goes stale it's of no use for trunking discovery. */ + nfs4_schedule_state_renewal(*result); + } +out: + return status; +} + struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) { struct rpc_cred *cred = NULL; @@ -93,26 +154,30 @@ struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) return cred; } -static void nfs4_clear_machine_cred(struct nfs_client *clp) +static void nfs4_root_machine_cred(struct nfs_client *clp) { - struct rpc_cred *cred; + struct rpc_cred *cred, *new; + new = rpc_lookup_machine_cred(NULL); spin_lock(&clp->cl_lock); cred = clp->cl_machine_cred; - clp->cl_machine_cred = NULL; + clp->cl_machine_cred = new; spin_unlock(&clp->cl_lock); if (cred != NULL) put_rpccred(cred); } -struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) +static struct rpc_cred * +nfs4_get_renew_cred_server_locked(struct nfs_server *server) { + struct rpc_cred *cred = NULL; struct nfs4_state_owner *sp; struct rb_node *pos; - struct rpc_cred *cred = NULL; - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); if (list_empty(&sp->so_states)) continue; cred = get_rpccred(sp->so_cred); @@ -121,6 +186,88 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) return cred; } +/** + * nfs4_get_renew_cred_locked - Acquire credential for a renew operation + * @clp: client state handle + * + * Returns an rpc_cred with reference count bumped, or NULL. + * Caller must hold clp->cl_lock. + */ +struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) +{ + struct rpc_cred *cred = NULL; + struct nfs_server *server; + + /* Use machine credentials if available */ + cred = nfs4_get_machine_cred_locked(clp); + if (cred != NULL) + goto out; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + cred = nfs4_get_renew_cred_server_locked(server); + if (cred != NULL) + break; + } + rcu_read_unlock(); + +out: + return cred; +} + +static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) +{ + if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { + spin_lock(&tbl->slot_tbl_lock); + nfs41_wake_slot_table(tbl); + spin_unlock(&tbl->slot_tbl_lock); + } +} + +static void nfs4_end_drain_session(struct nfs_client *clp) +{ + struct nfs4_session *ses = clp->cl_session; + + if (clp->cl_slot_tbl) { + nfs4_end_drain_slot_table(clp->cl_slot_tbl); + return; + } + + if (ses != NULL) { + nfs4_end_drain_slot_table(&ses->bc_slot_table); + nfs4_end_drain_slot_table(&ses->fc_slot_table); + } +} + +static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) +{ + set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); + spin_lock(&tbl->slot_tbl_lock); + if (tbl->highest_used_slotid != NFS4_NO_SLOT) { + reinit_completion(&tbl->complete); + spin_unlock(&tbl->slot_tbl_lock); + return wait_for_completion_interruptible(&tbl->complete); + } + spin_unlock(&tbl->slot_tbl_lock); + return 0; +} + +static int nfs4_begin_drain_session(struct nfs_client *clp) +{ + struct nfs4_session *ses = clp->cl_session; + int ret = 0; + + if (clp->cl_slot_tbl) + return nfs4_drain_slot_tbl(clp->cl_slot_tbl); + + /* back channel */ + ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); + if (ret) + return ret; + /* fore channel */ + return nfs4_drain_slot_tbl(&ses->fc_slot_table); +} + #if defined(CONFIG_NFS_V4_1) static int nfs41_setup_state_renewal(struct nfs_client *clp) @@ -128,6 +275,11 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp) int status; struct nfs_fsinfo fsinfo; + if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { + nfs4_schedule_state_renewal(clp); + return 0; + } + status = nfs4_proc_get_lease_time(clp, &fsinfo); if (status == 0) { /* Update lease time and schedule renewal */ @@ -142,222 +294,163 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp) return status; } -static void nfs4_end_drain_session(struct nfs_client *clp) -{ - struct nfs4_session *ses = clp->cl_session; - int max_slots; - - if (ses == NULL) - return; - if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { - spin_lock(&ses->fc_slot_table.slot_tbl_lock); - max_slots = ses->fc_slot_table.max_slots; - while (max_slots--) { - struct rpc_task *task; - - task = rpc_wake_up_next(&ses->fc_slot_table. - slot_tbl_waitq); - if (!task) - break; - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - } - spin_unlock(&ses->fc_slot_table.slot_tbl_lock); - } -} - -static int nfs4_begin_drain_session(struct nfs_client *clp) +static void nfs41_finish_session_reset(struct nfs_client *clp) { - struct nfs4_session *ses = clp->cl_session; - struct nfs4_slot_table *tbl = &ses->fc_slot_table; - - spin_lock(&tbl->slot_tbl_lock); - set_bit(NFS4_SESSION_DRAINING, &ses->session_state); - if (tbl->highest_used_slotid != -1) { - INIT_COMPLETION(ses->complete); - spin_unlock(&tbl->slot_tbl_lock); - return wait_for_completion_interruptible(&ses->complete); - } - spin_unlock(&tbl->slot_tbl_lock); - return 0; + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); + clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); + /* create_session negotiated new slot table */ + clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); + nfs41_setup_state_renewal(clp); } int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { int status; + if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) + goto do_confirm; nfs4_begin_drain_session(clp); status = nfs4_proc_exchange_id(clp, cred); if (status != 0) goto out; - status = nfs4_proc_create_session(clp); + set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); +do_confirm: + status = nfs4_proc_create_session(clp, cred); if (status != 0) goto out; - nfs41_setup_state_renewal(clp); + nfs41_finish_session_reset(clp); nfs_mark_client_ready(clp, NFS_CS_READY); out: return status; } -struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) +/** + * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) + * + * @clp: nfs_client under test + * @result: OUT: found nfs_client, or clp + * @cred: credential to use for trunking test + * + * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. + * If NFS4_OK is returned, an nfs_client pointer is planted in + * "result". + * + * Note: The returned client may not yet be marked ready. + */ +int nfs41_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **result, + struct rpc_cred *cred) { - struct rpc_cred *cred; + int status; - spin_lock(&clp->cl_lock); - cred = nfs4_get_machine_cred_locked(clp); - spin_unlock(&clp->cl_lock); - return cred; + status = nfs4_proc_exchange_id(clp, cred); + if (status != NFS4_OK) + return status; + set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); + + return nfs41_walk_client_list(clp, result, cred); } #endif /* CONFIG_NFS_V4_1 */ -struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) +/** + * nfs4_get_clid_cred - Acquire credential for a setclientid operation + * @clp: client state handle + * + * Returns an rpc_cred with reference count bumped, or NULL. + */ +struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) { - struct nfs4_state_owner *sp; - struct rb_node *pos; struct rpc_cred *cred; spin_lock(&clp->cl_lock); cred = nfs4_get_machine_cred_locked(clp); - if (cred != NULL) - goto out; - pos = rb_first(&clp->cl_state_owners); - if (pos != NULL) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); - cred = get_rpccred(sp->so_cred); - } -out: spin_unlock(&clp->cl_lock); return cred; } -static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, - __u64 minval, int maxbits) -{ - struct rb_node **p, *parent; - struct nfs_unique_id *pos; - __u64 mask = ~0ULL; - - if (maxbits < 64) - mask = (1ULL << maxbits) - 1ULL; - - /* Ensure distribution is more or less flat */ - get_random_bytes(&new->id, sizeof(new->id)); - new->id &= mask; - if (new->id < minval) - new->id += minval; -retry: - p = &root->rb_node; - parent = NULL; - - while (*p != NULL) { - parent = *p; - pos = rb_entry(parent, struct nfs_unique_id, rb_node); - - if (new->id < pos->id) - p = &(*p)->rb_left; - else if (new->id > pos->id) - p = &(*p)->rb_right; - else - goto id_exists; - } - rb_link_node(&new->rb_node, parent, p); - rb_insert_color(&new->rb_node, root); - return; -id_exists: - for (;;) { - new->id++; - if (new->id < minval || (new->id & mask) != new->id) { - new->id = minval; - break; - } - parent = rb_next(parent); - if (parent == NULL) - break; - pos = rb_entry(parent, struct nfs_unique_id, rb_node); - if (new->id < pos->id) - break; - } - goto retry; -} - -static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) -{ - rb_erase(&id->rb_node, root); -} - static struct nfs4_state_owner * -nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) +nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) { - struct nfs_client *clp = server->nfs_client; - struct rb_node **p = &clp->cl_state_owners.rb_node, + struct rb_node **p = &server->state_owners.rb_node, *parent = NULL; - struct nfs4_state_owner *sp, *res = NULL; + struct nfs4_state_owner *sp; while (*p != NULL) { parent = *p; - sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); + sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); - if (server < sp->so_server) { - p = &parent->rb_left; - continue; - } - if (server > sp->so_server) { - p = &parent->rb_right; - continue; - } if (cred < sp->so_cred) p = &parent->rb_left; else if (cred > sp->so_cred) p = &parent->rb_right; else { + if (!list_empty(&sp->so_lru)) + list_del_init(&sp->so_lru); atomic_inc(&sp->so_count); - res = sp; - break; + return sp; } } - return res; + return NULL; } static struct nfs4_state_owner * -nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) +nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) { - struct rb_node **p = &clp->cl_state_owners.rb_node, + struct nfs_server *server = new->so_server; + struct rb_node **p = &server->state_owners.rb_node, *parent = NULL; struct nfs4_state_owner *sp; + int err; while (*p != NULL) { parent = *p; - sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); + sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); - if (new->so_server < sp->so_server) { - p = &parent->rb_left; - continue; - } - if (new->so_server > sp->so_server) { - p = &parent->rb_right; - continue; - } if (new->so_cred < sp->so_cred) p = &parent->rb_left; else if (new->so_cred > sp->so_cred) p = &parent->rb_right; else { + if (!list_empty(&sp->so_lru)) + list_del_init(&sp->so_lru); atomic_inc(&sp->so_count); return sp; } } - nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); - rb_link_node(&new->so_client_node, parent, p); - rb_insert_color(&new->so_client_node, &clp->cl_state_owners); + err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); + if (err) + return ERR_PTR(err); + rb_link_node(&new->so_server_node, parent, p); + rb_insert_color(&new->so_server_node, &server->state_owners); return new; } static void -nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) +nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) +{ + struct nfs_server *server = sp->so_server; + + if (!RB_EMPTY_NODE(&sp->so_server_node)) + rb_erase(&sp->so_server_node, &server->state_owners); + ida_remove(&server->openowner_id, sp->so_seqid.owner_id); +} + +static void +nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) { - if (!RB_EMPTY_NODE(&sp->so_client_node)) - rb_erase(&sp->so_client_node, &clp->cl_state_owners); - nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); + sc->create_time = ktime_get(); + sc->flags = 0; + sc->counter = 0; + spin_lock_init(&sc->lock); + INIT_LIST_HEAD(&sc->list); + rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); +} + +static void +nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) +{ + rpc_destroy_wait_queue(&sc->wait); } /* @@ -366,75 +459,162 @@ nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) * */ static struct nfs4_state_owner * -nfs4_alloc_state_owner(void) +nfs4_alloc_state_owner(struct nfs_server *server, + struct rpc_cred *cred, + gfp_t gfp_flags) { struct nfs4_state_owner *sp; - sp = kzalloc(sizeof(*sp),GFP_NOFS); + sp = kzalloc(sizeof(*sp), gfp_flags); if (!sp) return NULL; + sp->so_server = server; + sp->so_cred = get_rpccred(cred); spin_lock_init(&sp->so_lock); INIT_LIST_HEAD(&sp->so_states); - rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); - sp->so_seqid.sequence = &sp->so_sequence; - spin_lock_init(&sp->so_sequence.lock); - INIT_LIST_HEAD(&sp->so_sequence.list); + nfs4_init_seqid_counter(&sp->so_seqid); atomic_set(&sp->so_count, 1); + INIT_LIST_HEAD(&sp->so_lru); + seqcount_init(&sp->so_reclaim_seqcount); + mutex_init(&sp->so_delegreturn_mutex); return sp; } static void nfs4_drop_state_owner(struct nfs4_state_owner *sp) { - if (!RB_EMPTY_NODE(&sp->so_client_node)) { - struct nfs_client *clp = sp->so_server->nfs_client; + struct rb_node *rb_node = &sp->so_server_node; + + if (!RB_EMPTY_NODE(rb_node)) { + struct nfs_server *server = sp->so_server; + struct nfs_client *clp = server->nfs_client; spin_lock(&clp->cl_lock); - rb_erase(&sp->so_client_node, &clp->cl_state_owners); - RB_CLEAR_NODE(&sp->so_client_node); + if (!RB_EMPTY_NODE(rb_node)) { + rb_erase(rb_node, &server->state_owners); + RB_CLEAR_NODE(rb_node); + } spin_unlock(&clp->cl_lock); } } -struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) +static void nfs4_free_state_owner(struct nfs4_state_owner *sp) +{ + nfs4_destroy_seqid_counter(&sp->so_seqid); + put_rpccred(sp->so_cred); + kfree(sp); +} + +static void nfs4_gc_state_owners(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs4_state_owner *sp, *tmp; + unsigned long time_min, time_max; + LIST_HEAD(doomed); + + spin_lock(&clp->cl_lock); + time_max = jiffies; + time_min = (long)time_max - (long)clp->cl_lease_time; + list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { + /* NB: LRU is sorted so that oldest is at the head */ + if (time_in_range(sp->so_expires, time_min, time_max)) + break; + list_move(&sp->so_lru, &doomed); + nfs4_remove_state_owner_locked(sp); + } + spin_unlock(&clp->cl_lock); + + list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { + list_del(&sp->so_lru); + nfs4_free_state_owner(sp); + } +} + +/** + * nfs4_get_state_owner - Look up a state owner given a credential + * @server: nfs_server to search + * @cred: RPC credential to match + * + * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. + */ +struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, + struct rpc_cred *cred, + gfp_t gfp_flags) { struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp, *new; spin_lock(&clp->cl_lock); - sp = nfs4_find_state_owner(server, cred); + sp = nfs4_find_state_owner_locked(server, cred); spin_unlock(&clp->cl_lock); if (sp != NULL) - return sp; - new = nfs4_alloc_state_owner(); + goto out; + new = nfs4_alloc_state_owner(server, cred, gfp_flags); if (new == NULL) - return NULL; - new->so_server = server; - new->so_cred = cred; - spin_lock(&clp->cl_lock); - sp = nfs4_insert_state_owner(clp, new); - spin_unlock(&clp->cl_lock); - if (sp == new) - get_rpccred(cred); - else { - rpc_destroy_wait_queue(&new->so_sequence.wait); - kfree(new); - } + goto out; + do { + if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) + break; + spin_lock(&clp->cl_lock); + sp = nfs4_insert_state_owner_locked(new); + spin_unlock(&clp->cl_lock); + } while (sp == ERR_PTR(-EAGAIN)); + if (sp != new) + nfs4_free_state_owner(new); +out: + nfs4_gc_state_owners(server); return sp; } +/** + * nfs4_put_state_owner - Release a nfs4_state_owner + * @sp: state owner data to release + * + * Note that we keep released state owners on an LRU + * list. + * This caches valid state owners so that they can be + * reused, to avoid the OPEN_CONFIRM on minor version 0. + * It also pins the uniquifier of dropped state owners for + * a while, to ensure that those state owner names are + * never reused. + */ void nfs4_put_state_owner(struct nfs4_state_owner *sp) { - struct nfs_client *clp = sp->so_server->nfs_client; - struct rpc_cred *cred = sp->so_cred; + struct nfs_server *server = sp->so_server; + struct nfs_client *clp = server->nfs_client; if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) return; - nfs4_remove_state_owner(clp, sp); + + sp->so_expires = jiffies; + list_add_tail(&sp->so_lru, &server->state_owners_lru); spin_unlock(&clp->cl_lock); - rpc_destroy_wait_queue(&sp->so_sequence.wait); - put_rpccred(cred); - kfree(sp); +} + +/** + * nfs4_purge_state_owners - Release all cached state owners + * @server: nfs_server with cached state owners to release + * + * Called at umount time. Remaining state owners will be on + * the LRU with ref count of zero. + */ +void nfs4_purge_state_owners(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs4_state_owner *sp, *tmp; + LIST_HEAD(doomed); + + spin_lock(&clp->cl_lock); + list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { + list_move(&sp->so_lru, &doomed); + nfs4_remove_state_owner_locked(sp); + } + spin_unlock(&clp->cl_lock); + + list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { + list_del(&sp->so_lru); + nfs4_free_state_owner(sp); + } } static struct nfs4_state * @@ -476,6 +656,8 @@ __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) list_for_each_entry(state, &nfsi->open_states, inode_states) { if (state->owner != owner) continue; + if (!nfs4_valid_open_stateid(state)) + continue; if (atomic_inc_not_zero(&state->count)) return state; } @@ -508,7 +690,8 @@ nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) state->owner = owner; atomic_inc(&owner->so_count); list_add(&state->inode_states, &nfsi->open_states); - state->inode = igrab(inode); + ihold(inode); + state->inode = inode; spin_unlock(&inode->i_lock); /* Note: The reclaim code dictates that we add stateless * and read-only stateids to the end of the list */ @@ -544,7 +727,7 @@ void nfs4_put_open_state(struct nfs4_state *state) /* * Close the current file. */ -static void __nfs4_close(struct path *path, struct nfs4_state *state, +static void __nfs4_close(struct nfs4_state *state, fmode_t fmode, gfp_t gfp_mask, int wait) { struct nfs4_state_owner *owner = state->owner; @@ -586,17 +769,17 @@ static void __nfs4_close(struct path *path, struct nfs4_state *state, nfs4_put_open_state(state); nfs4_put_state_owner(owner); } else - nfs4_do_close(path, state, gfp_mask, wait); + nfs4_do_close(state, gfp_mask, wait); } -void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) +void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) { - __nfs4_close(path, state, fmode, GFP_NOFS, 0); + __nfs4_close(state, fmode, GFP_NOFS, 0); } -void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) +void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) { - __nfs4_close(path, state, fmode, GFP_KERNEL, 1); + __nfs4_close(state, fmode, GFP_KERNEL, 1); } /* @@ -633,15 +816,12 @@ __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_p static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) { struct nfs4_lock_state *lsp; - struct nfs_client *clp = state->owner->so_server->nfs_client; + struct nfs_server *server = state->owner->so_server; lsp = kzalloc(sizeof(*lsp), GFP_NOFS); if (lsp == NULL) return NULL; - rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); - spin_lock_init(&lsp->ls_sequence.lock); - INIT_LIST_HEAD(&lsp->ls_sequence.list); - lsp->ls_seqid.sequence = &lsp->ls_sequence; + nfs4_init_seqid_counter(&lsp->ls_seqid); atomic_set(&lsp->ls_count, 1); lsp->ls_state = state; lsp->ls_owner.lo_type = type; @@ -653,24 +833,22 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f lsp->ls_owner.lo_u.posix_owner = fl_owner; break; default: - kfree(lsp); - return NULL; + goto out_free; } - spin_lock(&clp->cl_lock); - nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); - spin_unlock(&clp->cl_lock); + lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); + if (lsp->ls_seqid.owner_id < 0) + goto out_free; INIT_LIST_HEAD(&lsp->ls_locks); return lsp; +out_free: + kfree(lsp); + return NULL; } -static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) +void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) { - struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; - - spin_lock(&clp->cl_lock); - nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); - spin_unlock(&clp->cl_lock); - rpc_destroy_wait_queue(&lsp->ls_sequence.wait); + ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); + nfs4_destroy_seqid_counter(&lsp->ls_seqid); kfree(lsp); } @@ -702,7 +880,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_ } spin_unlock(&state->state_lock); if (new != NULL) - nfs4_free_lock_state(new); + nfs4_free_lock_state(state->owner->so_server, new); return lsp; } @@ -712,6 +890,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_ */ void nfs4_put_lock_state(struct nfs4_lock_state *lsp) { + struct nfs_server *server; struct nfs4_state *state; if (lsp == NULL) @@ -723,9 +902,13 @@ void nfs4_put_lock_state(struct nfs4_lock_state *lsp) if (list_empty(&state->lock_states)) clear_bit(LK_STATE_IN_USE, &state->flags); spin_unlock(&state->state_lock); - if (lsp->ls_flags & NFS_LOCK_INITIALIZED) - nfs4_release_lockowner(lsp); - nfs4_free_lock_state(lsp); + server = state->owner->so_server; + if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { + struct nfs_client *clp = server->nfs_client; + + clp->cl_mvops->free_lock_state(server, lsp); + } else + nfs4_free_lock_state(server, lsp); } static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) @@ -755,7 +938,8 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) if (fl->fl_flags & FL_POSIX) lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); else if (fl->fl_flags & FL_FLOCK) - lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); + lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, + NFS4_FLOCK_LOCK_TYPE); else return -EINVAL; if (lsp == NULL) @@ -765,28 +949,80 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) return 0; } -/* - * Byte-range lock aware utility to initialize the stateid of read/write - * requests. - */ -void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) +static int nfs4_copy_lock_stateid(nfs4_stateid *dst, + struct nfs4_state *state, + const struct nfs_lockowner *lockowner) { struct nfs4_lock_state *lsp; - int seq; + fl_owner_t fl_owner; + pid_t fl_pid; + int ret = -ENOENT; + + + if (lockowner == NULL) + goto out; - do { - seq = read_seqbegin(&state->seqlock); - memcpy(dst, &state->stateid, sizeof(*dst)); - } while (read_seqretry(&state->seqlock, seq)); if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) - return; + goto out; + fl_owner = lockowner->l_owner; + fl_pid = lockowner->l_pid; spin_lock(&state->state_lock); lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); - if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) - memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); + if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) + ret = -EIO; + else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { + nfs4_stateid_copy(dst, &lsp->ls_stateid); + ret = 0; + } spin_unlock(&state->state_lock); nfs4_put_lock_state(lsp); +out: + return ret; +} + +static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) +{ + const nfs4_stateid *src; + int seq; + + do { + src = &zero_stateid; + seq = read_seqbegin(&state->seqlock); + if (test_bit(NFS_OPEN_STATE, &state->flags)) + src = &state->open_stateid; + nfs4_stateid_copy(dst, src); + } while (read_seqretry(&state->seqlock, seq)); +} + +/* + * Byte-range lock aware utility to initialize the stateid of read/write + * requests. + */ +int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, + fmode_t fmode, const struct nfs_lockowner *lockowner) +{ + int ret = nfs4_copy_lock_stateid(dst, state, lockowner); + if (ret == -EIO) + /* A lost lock - don't even consider delegations */ + goto out; + /* returns true if delegation stateid found and copied */ + if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) { + ret = 0; + goto out; + } + if (ret != -ENOENT) + /* nfs4_copy_delegation_stateid() didn't over-write + * dst, so it still has the lock stateid which we now + * choose to use. + */ + goto out; + nfs4_copy_open_stateid(dst, state); + ret = 0; +out: + if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) + dst->seqid = 0; + return ret; } struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) @@ -797,20 +1033,28 @@ struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_m if (new != NULL) { new->sequence = counter; INIT_LIST_HEAD(&new->list); + new->task = NULL; } return new; } void nfs_release_seqid(struct nfs_seqid *seqid) { - if (!list_empty(&seqid->list)) { - struct rpc_sequence *sequence = seqid->sequence->sequence; + struct nfs_seqid_counter *sequence; + + if (list_empty(&seqid->list)) + return; + sequence = seqid->sequence; + spin_lock(&sequence->lock); + list_del_init(&seqid->list); + if (!list_empty(&sequence->list)) { + struct nfs_seqid *next; - spin_lock(&sequence->lock); - list_del_init(&seqid->list); - spin_unlock(&sequence->lock); - rpc_wake_up(&sequence->wait); + next = list_first_entry(&sequence->list, + struct nfs_seqid, list); + rpc_wake_up_queued_task(&sequence->wait, next->task); } + spin_unlock(&sequence->lock); } void nfs_free_seqid(struct nfs_seqid *seqid) @@ -822,18 +1066,17 @@ void nfs_free_seqid(struct nfs_seqid *seqid) /* * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or * failed with a seqid incrementing error - - * see comments nfs_fs.h:seqid_mutating_error() + * see comments nfs4.h:seqid_mutating_error() */ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) { - BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); switch (status) { case 0: break; case -NFS4ERR_BAD_SEQID: if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) return; - printk(KERN_WARNING "NFS: v4 server returned a bad" + pr_warn_ratelimited("NFS: v4 server returned a bad" " sequence-id error on an" " unconfirmed sequence %p!\n", seqid->sequence); @@ -868,7 +1111,7 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) /* * Increment the seqid if the LOCK/LOCKU succeeded, or * failed with a seqid incrementing error - - * see comments nfs_fs.h:seqid_mutating_error() + * see comments nfs4.h:seqid_mutating_error() */ void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) { @@ -877,10 +1120,11 @@ void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) { - struct rpc_sequence *sequence = seqid->sequence->sequence; + struct nfs_seqid_counter *sequence = seqid->sequence; int status = 0; spin_lock(&sequence->lock); + seqid->task = task; if (list_empty(&seqid->list)) list_add_tail(&seqid->list, &sequence->list); if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) @@ -896,9 +1140,9 @@ static int nfs4_run_state_manager(void *); static void nfs4_clear_state_manager_bit(struct nfs_client *clp) { - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); rpc_wake_up(&clp->cl_rpcwaitq); } @@ -909,34 +1153,156 @@ static void nfs4_clear_state_manager_bit(struct nfs_client *clp) void nfs4_schedule_state_manager(struct nfs_client *clp) { struct task_struct *task; + char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) return; __module_get(THIS_MODULE); atomic_inc(&clp->cl_count); - task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)); - if (!IS_ERR(task)) - return; - nfs4_clear_state_manager_bit(clp); - nfs_put_client(clp); - module_put(THIS_MODULE); + + /* The rcu_read_lock() is not strictly necessary, as the state + * manager is the only thread that ever changes the rpc_xprt + * after it's initialized. At this point, we're single threaded. */ + rcu_read_lock(); + snprintf(buf, sizeof(buf), "%s-manager", + rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + rcu_read_unlock(); + task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); + if (IS_ERR(task)) { + printk(KERN_ERR "%s: kthread_run: %ld\n", + __func__, PTR_ERR(task)); + nfs4_clear_state_manager_bit(clp); + nfs_put_client(clp); + module_put(THIS_MODULE); + } } /* - * Schedule a state recovery attempt + * Schedule a lease recovery attempt */ -void nfs4_schedule_state_recovery(struct nfs_client *clp) +void nfs4_schedule_lease_recovery(struct nfs_client *clp) { if (!clp) return; if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); + dprintk("%s: scheduling lease recovery for server %s\n", __func__, + clp->cl_hostname); nfs4_schedule_state_manager(clp); } +EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); -int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) +/** + * nfs4_schedule_migration_recovery - trigger migration recovery + * + * @server: FSID that is migrating + * + * Returns zero if recovery has started, otherwise a negative NFS4ERR + * value is returned. + */ +int nfs4_schedule_migration_recovery(const struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + + if (server->fh_expire_type != NFS4_FH_PERSISTENT) { + pr_err("NFS: volatile file handles not supported (server %s)\n", + clp->cl_hostname); + return -NFS4ERR_IO; + } + + if (test_bit(NFS_MIG_FAILED, &server->mig_status)) + return -NFS4ERR_IO; + + dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", + __func__, + (unsigned long long)server->fsid.major, + (unsigned long long)server->fsid.minor, + clp->cl_hostname); + + set_bit(NFS_MIG_IN_TRANSITION, + &((struct nfs_server *)server)->mig_status); + set_bit(NFS4CLNT_MOVED, &clp->cl_state); + + nfs4_schedule_state_manager(clp); + return 0; +} +EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); + +/** + * nfs4_schedule_lease_moved_recovery - start lease-moved recovery + * + * @clp: server to check for moved leases + * + */ +void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) +{ + dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", + __func__, clp->cl_clientid, clp->cl_hostname); + + set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); + nfs4_schedule_state_manager(clp); +} +EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); + +int nfs4_wait_clnt_recover(struct nfs_client *clp) +{ + int res; + + might_sleep(); + + atomic_inc(&clp->cl_count); + res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, + nfs_wait_bit_killable, TASK_KILLABLE); + if (res) + goto out; + if (clp->cl_cons_state < 0) + res = clp->cl_cons_state; +out: + nfs_put_client(clp); + return res; +} + +int nfs4_client_recover_expired_lease(struct nfs_client *clp) +{ + unsigned int loop; + int ret; + + for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { + ret = nfs4_wait_clnt_recover(clp); + if (ret != 0) + break; + if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && + !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) + break; + nfs4_schedule_state_manager(clp); + ret = -EIO; + } + return ret; +} + +/* + * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN + * @clp: client to process + * + * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a + * resend of the SETCLIENTID and hence re-establish the + * callback channel. Then return all existing delegations. + */ +static void nfs40_handle_cb_pathdown(struct nfs_client *clp) +{ + set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); + nfs_expire_all_delegations(clp); + dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, + clp->cl_hostname); +} + +void nfs4_schedule_path_down_recovery(struct nfs_client *clp) +{ + nfs40_handle_cb_pathdown(clp); + nfs4_schedule_state_manager(clp); +} + +static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) { set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); @@ -959,6 +1325,68 @@ int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *s return 1; } +int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) +{ + struct nfs_client *clp = server->nfs_client; + + if (!nfs4_valid_open_stateid(state)) + return -EBADF; + nfs4_state_mark_reclaim_nograce(clp, state); + dprintk("%s: scheduling stateid recovery for server %s\n", __func__, + clp->cl_hostname); + nfs4_schedule_state_manager(clp); + return 0; +} +EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); + +void nfs_inode_find_state_and_recover(struct inode *inode, + const nfs4_stateid *stateid) +{ + struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_open_context *ctx; + struct nfs4_state *state; + bool found = false; + + spin_lock(&inode->i_lock); + list_for_each_entry(ctx, &nfsi->open_files, list) { + state = ctx->state; + if (state == NULL) + continue; + if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) + continue; + if (!nfs4_stateid_match(&state->stateid, stateid)) + continue; + nfs4_state_mark_reclaim_nograce(clp, state); + found = true; + } + spin_unlock(&inode->i_lock); + if (found) + nfs4_schedule_state_manager(clp); +} + +static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) +{ + struct inode *inode = state->inode; + struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_open_context *ctx; + + spin_lock(&inode->i_lock); + list_for_each_entry(ctx, &nfsi->open_files, list) { + if (ctx->state != state) + continue; + set_bit(NFS_CONTEXT_BAD, &ctx->flags); + } + spin_unlock(&inode->i_lock); +} + +static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) +{ + set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); + nfs4_state_mark_open_context_bad(state); +} + + static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) { struct inode *inode = state->inode; @@ -972,13 +1400,13 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ /* Guard against delegation returns and new lock/unlock calls */ down_write(&nfsi->rwsem); /* Protect inode->i_flock using the BKL */ - lock_flocks(); + spin_lock(&inode->i_lock); for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) continue; if (nfs_file_open_context(fl->fl_file)->state != state) continue; - unlock_flocks(); + spin_unlock(&inode->i_lock); status = ops->recover_lock(state, fl); switch (status) { case 0: @@ -996,8 +1424,8 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: goto out; default: - printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", - __func__, status); + printk(KERN_ERR "NFS: %s: unhandled error %d\n", + __func__, status); case -ENOMEM: case -NFS4ERR_DENIED: case -NFS4ERR_RECLAIM_BAD: @@ -1005,9 +1433,9 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_ /* kill_proc(fl->fl_pid, SIGLOST, 1); */ status = 0; } - lock_flocks(); + spin_lock(&inode->i_lock); } - unlock_flocks(); + spin_unlock(&inode->i_lock); out: up_write(&nfsi->rwsem); return status; @@ -1027,11 +1455,14 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs * recovering after a network partition or a reboot from a * server that doesn't support a grace period. */ -restart: spin_lock(&sp->so_lock); + raw_write_seqcount_begin(&sp->so_reclaim_seqcount); +restart: list_for_each_entry(state, &sp->so_states, open_states) { if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) continue; + if (!nfs4_valid_open_stateid(state)) + continue; if (state->state == 0) continue; atomic_inc(&state->count); @@ -1040,39 +1471,33 @@ restart: if (status >= 0) { status = nfs4_reclaim_locks(state, ops); if (status >= 0) { - list_for_each_entry(lock, &state->lock_states, ls_locks) { - if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) - printk("%s: Lock reclaim failed!\n", - __func__); + if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { + spin_lock(&state->state_lock); + list_for_each_entry(lock, &state->lock_states, ls_locks) { + if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) + pr_warn_ratelimited("NFS: " + "%s: Lock reclaim " + "failed!\n", __func__); + } + spin_unlock(&state->state_lock); } nfs4_put_open_state(state); + spin_lock(&sp->so_lock); goto restart; } } switch (status) { default: - printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", - __func__, status); + printk(KERN_ERR "NFS: %s: unhandled error %d\n", + __func__, status); case -ENOENT: case -ENOMEM: case -ESTALE: - /* - * Open state on this file cannot be recovered - * All we can do is revert to using the zero stateid. - */ - memset(state->stateid.data, 0, - sizeof(state->stateid.data)); - /* Mark the file as being 'closed' */ - state->state = 0; - break; - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ + /* Open state on this file cannot be recovered */ + nfs4_state_mark_recovery_failed(state, status); break; + case -EAGAIN: + ssleep(1); case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: @@ -1091,12 +1516,17 @@ restart: goto out_err; } nfs4_put_open_state(state); + spin_lock(&sp->so_lock); goto restart; } + raw_write_seqcount_end(&sp->so_reclaim_seqcount); spin_unlock(&sp->so_lock); return 0; out_err: nfs4_put_open_state(state); + spin_lock(&sp->so_lock); + raw_write_seqcount_end(&sp->so_reclaim_seqcount); + spin_unlock(&sp->so_lock); return status; } @@ -1108,21 +1538,27 @@ static void nfs4_clear_open_state(struct nfs4_state *state) clear_bit(NFS_O_RDONLY_STATE, &state->flags); clear_bit(NFS_O_WRONLY_STATE, &state->flags); clear_bit(NFS_O_RDWR_STATE, &state->flags); + spin_lock(&state->state_lock); list_for_each_entry(lock, &state->lock_states, ls_locks) { lock->ls_seqid.flags = 0; - lock->ls_flags &= ~NFS_LOCK_INITIALIZED; + clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); } + spin_unlock(&state->state_lock); } -static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) +static void nfs4_reset_seqids(struct nfs_server *server, + int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) { + struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp; struct rb_node *pos; struct nfs4_state *state; - /* Reset all sequence ids to zero */ - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); sp->so_seqid.flags = 0; spin_lock(&sp->so_lock); list_for_each_entry(state, &sp->so_states, open_states) { @@ -1131,6 +1567,18 @@ static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_re } spin_unlock(&sp->so_lock); } + spin_unlock(&clp->cl_lock); +} + +static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, + int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) +{ + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs4_reset_seqids(server, mark_reclaim); + rcu_read_unlock(); } static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) @@ -1141,32 +1589,49 @@ static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) } static void nfs4_reclaim_complete(struct nfs_client *clp, - const struct nfs4_state_recovery_ops *ops) + const struct nfs4_state_recovery_ops *ops, + struct rpc_cred *cred) { /* Notify the server we're done reclaiming our state */ if (ops->reclaim_complete) - (void)ops->reclaim_complete(clp); + (void)ops->reclaim_complete(clp, cred); } -static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) +static void nfs4_clear_reclaim_server(struct nfs_server *server) { + struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp; struct rb_node *pos; struct nfs4_state *state; - if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) - return 0; - - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); spin_lock(&sp->so_lock); list_for_each_entry(state, &sp->so_states, open_states) { - if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) + if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, + &state->flags)) continue; nfs4_state_mark_reclaim_nograce(clp, state); } spin_unlock(&sp->so_lock); } + spin_unlock(&clp->cl_lock); +} + +static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) +{ + struct nfs_server *server; + + if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) + return 0; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs4_clear_reclaim_server(server); + rcu_read_unlock(); nfs_delegation_reap_unclaimed(clp); return 1; @@ -1174,9 +1639,15 @@ static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) { + const struct nfs4_state_recovery_ops *ops; + struct rpc_cred *cred; + if (!nfs4_state_clear_reclaim_reboot(clp)) return; - nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); + ops = clp->cl_mvops->reboot_recovery_ops; + cred = nfs4_get_clid_cred(clp); + nfs4_reclaim_complete(clp, ops, cred); + put_rpccred(cred); } static void nfs_delegation_clear_all(struct nfs_client *clp) @@ -1191,25 +1662,18 @@ static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); } -static void nfs4_warn_keyexpired(const char *s) -{ - printk_ratelimited(KERN_WARNING "Error: state manager" - " encountered RPCSEC_GSS session" - " expired against NFSv4 server %s.\n", - s); -} - static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) { switch (error) { + case 0: + break; case -NFS4ERR_CB_PATH_DOWN: - nfs_handle_cb_pathdown(clp); - return 0; + nfs40_handle_cb_pathdown(clp); + break; case -NFS4ERR_NO_GRACE: nfs4_state_end_reclaim_reboot(clp); - return 0; + break; case -NFS4ERR_STALE_CLIENTID: - case -NFS4ERR_LEASE_MOVED: set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); nfs4_state_clear_reclaim_reboot(clp); nfs4_state_start_reclaim_reboot(clp); @@ -1222,43 +1686,61 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) case -NFS4ERR_BADSLOT: case -NFS4ERR_BAD_HIGH_SLOT: case -NFS4ERR_DEADSESSION: - case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: case -NFS4ERR_SEQ_FALSE_RETRY: case -NFS4ERR_SEQ_MISORDERED: set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); /* Zero session reset errors */ - return 0; - case -EKEYEXPIRED: - /* Nothing we can do */ - nfs4_warn_keyexpired(clp->cl_hostname); - return 0; + break; + case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: + set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); + break; + default: + dprintk("%s: failed to handle error %d for server %s\n", + __func__, error, clp->cl_hostname); + return error; } - return error; + dprintk("%s: handled error %d for server %s\n", __func__, error, + clp->cl_hostname); + return 0; } static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) { + struct nfs4_state_owner *sp; + struct nfs_server *server; struct rb_node *pos; int status = 0; restart: - spin_lock(&clp->cl_lock); - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); - if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) - continue; - atomic_inc(&sp->so_count); - spin_unlock(&clp->cl_lock); - status = nfs4_reclaim_open_state(sp, ops); - if (status < 0) { - set_bit(ops->owner_flag_bit, &sp->so_flags); + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + nfs4_purge_state_owners(server); + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, + struct nfs4_state_owner, so_server_node); + if (!test_and_clear_bit(ops->owner_flag_bit, + &sp->so_flags)) + continue; + atomic_inc(&sp->so_count); + spin_unlock(&clp->cl_lock); + rcu_read_unlock(); + + status = nfs4_reclaim_open_state(sp, ops); + if (status < 0) { + set_bit(ops->owner_flag_bit, &sp->so_flags); + nfs4_put_state_owner(sp); + return nfs4_recovery_handle_error(clp, status); + } + nfs4_put_state_owner(sp); - return nfs4_recovery_handle_error(clp, status); + goto restart; } - nfs4_put_state_owner(sp); - goto restart; + spin_unlock(&clp->cl_lock); } - spin_unlock(&clp->cl_lock); + rcu_read_unlock(); return status; } @@ -1267,7 +1749,7 @@ static int nfs4_check_lease(struct nfs_client *clp) struct rpc_cred *cred; const struct nfs4_state_maintenance_ops *ops = clp->cl_mvops->state_renewal_ops; - int status = -NFS4ERR_EXPIRED; + int status; /* Is the client already known to have an expired lease? */ if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) @@ -1276,51 +1758,424 @@ static int nfs4_check_lease(struct nfs_client *clp) cred = ops->get_state_renewal_cred_locked(clp); spin_unlock(&clp->cl_lock); if (cred == NULL) { - cred = nfs4_get_setclientid_cred(clp); + cred = nfs4_get_clid_cred(clp); + status = -ENOKEY; if (cred == NULL) goto out; } status = ops->renew_lease(clp, cred); put_rpccred(cred); + if (status == -ETIMEDOUT) { + set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); + return 0; + } out: return nfs4_recovery_handle_error(clp, status); } -static int nfs4_reclaim_lease(struct nfs_client *clp) +/* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors + * and for recoverable errors on EXCHANGE_ID for v4.1 + */ +static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) +{ + switch (status) { + case -NFS4ERR_SEQ_MISORDERED: + if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) + return -ESERVERFAULT; + /* Lease confirmation error: retry after purging the lease */ + ssleep(1); + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); + break; + case -NFS4ERR_STALE_CLIENTID: + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); + nfs4_state_clear_reclaim_reboot(clp); + nfs4_state_start_reclaim_reboot(clp); + break; + case -NFS4ERR_CLID_INUSE: + pr_err("NFS: Server %s reports our clientid is in use\n", + clp->cl_hostname); + nfs_mark_client_ready(clp, -EPERM); + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); + return -EPERM; + case -EACCES: + case -NFS4ERR_DELAY: + case -ETIMEDOUT: + case -EAGAIN: + ssleep(1); + break; + + case -NFS4ERR_MINOR_VERS_MISMATCH: + if (clp->cl_cons_state == NFS_CS_SESSION_INITING) + nfs_mark_client_ready(clp, -EPROTONOSUPPORT); + dprintk("%s: exit with error %d for server %s\n", + __func__, -EPROTONOSUPPORT, clp->cl_hostname); + return -EPROTONOSUPPORT; + case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery + * in nfs4_exchange_id */ + default: + dprintk("%s: exit with error %d for server %s\n", __func__, + status, clp->cl_hostname); + return status; + } + set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); + dprintk("%s: handled error %d for server %s\n", __func__, status, + clp->cl_hostname); + return 0; +} + +static int nfs4_establish_lease(struct nfs_client *clp) { struct rpc_cred *cred; const struct nfs4_state_recovery_ops *ops = clp->cl_mvops->reboot_recovery_ops; - int status = -ENOENT; + int status; - cred = ops->get_clid_cred(clp); - if (cred != NULL) { - status = ops->establish_clid(clp, cred); - put_rpccred(cred); - /* Handle case where the user hasn't set up machine creds */ - if (status == -EACCES && cred == clp->cl_machine_cred) { - nfs4_clear_machine_cred(clp); - status = -EAGAIN; + cred = nfs4_get_clid_cred(clp); + if (cred == NULL) + return -ENOENT; + status = ops->establish_clid(clp, cred); + put_rpccred(cred); + if (status != 0) + return status; + pnfs_destroy_all_layouts(clp); + return 0; +} + +/* + * Returns zero or a negative errno. NFS4ERR values are converted + * to local errno values. + */ +static int nfs4_reclaim_lease(struct nfs_client *clp) +{ + int status; + + status = nfs4_establish_lease(clp); + if (status < 0) + return nfs4_handle_reclaim_lease_error(clp, status); + if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) + nfs4_state_start_reclaim_nograce(clp); + if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) + set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); + clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); + clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); + return 0; +} + +static int nfs4_purge_lease(struct nfs_client *clp) +{ + int status; + + status = nfs4_establish_lease(clp); + if (status < 0) + return nfs4_handle_reclaim_lease_error(clp, status); + clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); + set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); + nfs4_state_start_reclaim_nograce(clp); + return 0; +} + +/* + * Try remote migration of one FSID from a source server to a + * destination server. The source server provides a list of + * potential destinations. + * + * Returns zero or a negative NFS4ERR status code. + */ +static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs4_fs_locations *locations = NULL; + struct inode *inode; + struct page *page; + int status, result; + + dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, + (unsigned long long)server->fsid.major, + (unsigned long long)server->fsid.minor, + clp->cl_hostname); + + result = 0; + page = alloc_page(GFP_KERNEL); + locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); + if (page == NULL || locations == NULL) { + dprintk("<-- %s: no memory\n", __func__); + goto out; + } + + inode = server->super->s_root->d_inode; + result = nfs4_proc_get_locations(inode, locations, page, cred); + if (result) { + dprintk("<-- %s: failed to retrieve fs_locations: %d\n", + __func__, result); + goto out; + } + + result = -NFS4ERR_NXIO; + if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { + dprintk("<-- %s: No fs_locations data, migration skipped\n", + __func__); + goto out; + } + + nfs4_begin_drain_session(clp); + + status = nfs4_replace_transport(server, locations); + if (status != 0) { + dprintk("<-- %s: failed to replace transport: %d\n", + __func__, status); + goto out; + } + + result = 0; + dprintk("<-- %s: migration succeeded\n", __func__); + +out: + if (page != NULL) + __free_page(page); + kfree(locations); + if (result) { + pr_err("NFS: migration recovery failed (server %s)\n", + clp->cl_hostname); + set_bit(NFS_MIG_FAILED, &server->mig_status); + } + return result; +} + +/* + * Returns zero or a negative NFS4ERR status code. + */ +static int nfs4_handle_migration(struct nfs_client *clp) +{ + const struct nfs4_state_maintenance_ops *ops = + clp->cl_mvops->state_renewal_ops; + struct nfs_server *server; + struct rpc_cred *cred; + + dprintk("%s: migration reported on \"%s\"\n", __func__, + clp->cl_hostname); + + spin_lock(&clp->cl_lock); + cred = ops->get_state_renewal_cred_locked(clp); + spin_unlock(&clp->cl_lock); + if (cred == NULL) + return -NFS4ERR_NOENT; + + clp->cl_mig_gen++; +restart: + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + int status; + + if (server->mig_gen == clp->cl_mig_gen) + continue; + server->mig_gen = clp->cl_mig_gen; + + if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, + &server->mig_status)) + continue; + + rcu_read_unlock(); + status = nfs4_try_migration(server, cred); + if (status < 0) { + put_rpccred(cred); + return status; } - if (status == -NFS4ERR_MINOR_VERS_MISMATCH) - status = -EPROTONOSUPPORT; + goto restart; + } + rcu_read_unlock(); + put_rpccred(cred); + return 0; +} + +/* + * Test each nfs_server on the clp's cl_superblocks list to see + * if it's moved to another server. Stop when the server no longer + * returns NFS4ERR_LEASE_MOVED. + */ +static int nfs4_handle_lease_moved(struct nfs_client *clp) +{ + const struct nfs4_state_maintenance_ops *ops = + clp->cl_mvops->state_renewal_ops; + struct nfs_server *server; + struct rpc_cred *cred; + + dprintk("%s: lease moved reported on \"%s\"\n", __func__, + clp->cl_hostname); + + spin_lock(&clp->cl_lock); + cred = ops->get_state_renewal_cred_locked(clp); + spin_unlock(&clp->cl_lock); + if (cred == NULL) + return -NFS4ERR_NOENT; + + clp->cl_mig_gen++; +restart: + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + struct inode *inode; + int status; + + if (server->mig_gen == clp->cl_mig_gen) + continue; + server->mig_gen = clp->cl_mig_gen; + + rcu_read_unlock(); + + inode = server->super->s_root->d_inode; + status = nfs4_proc_fsid_present(inode, cred); + if (status != -NFS4ERR_MOVED) + goto restart; /* wasn't this one */ + if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) + goto restart; /* there are more */ + goto out; } + rcu_read_unlock(); + +out: + put_rpccred(cred); + return 0; +} + +/** + * nfs4_discover_server_trunking - Detect server IP address trunking + * + * @clp: nfs_client under test + * @result: OUT: found nfs_client, or clp + * + * Returns zero or a negative errno. If zero is returned, + * an nfs_client pointer is planted in "result". + * + * Note: since we are invoked in process context, and + * not from inside the state manager, we cannot use + * nfs4_handle_reclaim_lease_error(). + */ +int nfs4_discover_server_trunking(struct nfs_client *clp, + struct nfs_client **result) +{ + const struct nfs4_state_recovery_ops *ops = + clp->cl_mvops->reboot_recovery_ops; + struct rpc_clnt *clnt; + struct rpc_cred *cred; + int i, status; + + dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); + + clnt = clp->cl_rpcclient; + i = 0; + + mutex_lock(&nfs_clid_init_mutex); +again: + status = -ENOENT; + cred = nfs4_get_clid_cred(clp); + if (cred == NULL) + goto out_unlock; + + status = ops->detect_trunking(clp, result, cred); + put_rpccred(cred); + switch (status) { + case 0: + break; + case -ETIMEDOUT: + if (clnt->cl_softrtry) + break; + case -NFS4ERR_DELAY: + case -EAGAIN: + ssleep(1); + case -NFS4ERR_STALE_CLIENTID: + dprintk("NFS: %s after status %d, retrying\n", + __func__, status); + goto again; + case -EACCES: + if (i++ == 0) { + nfs4_root_machine_cred(clp); + goto again; + } + if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) + break; + case -NFS4ERR_CLID_INUSE: + case -NFS4ERR_WRONGSEC: + /* No point in retrying if we already used RPC_AUTH_UNIX */ + if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { + status = -EPERM; + break; + } + clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); + if (IS_ERR(clnt)) { + status = PTR_ERR(clnt); + break; + } + /* Note: this is safe because we haven't yet marked the + * client as ready, so we are the only user of + * clp->cl_rpcclient + */ + clnt = xchg(&clp->cl_rpcclient, clnt); + rpc_shutdown_client(clnt); + clnt = clp->cl_rpcclient; + goto again; + + case -NFS4ERR_MINOR_VERS_MISMATCH: + status = -EPROTONOSUPPORT; + break; + + case -EKEYEXPIRED: + case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery + * in nfs4_exchange_id */ + status = -EKEYEXPIRED; + break; + default: + pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", + __func__, status); + status = -EIO; + } + +out_unlock: + mutex_unlock(&nfs_clid_init_mutex); + dprintk("NFS: %s: status = %d\n", __func__, status); return status; } #ifdef CONFIG_NFS_V4_1 -void nfs41_handle_recall_slot(struct nfs_client *clp) +void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) +{ + struct nfs_client *clp = session->clp; + + switch (err) { + default: + set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); + break; + case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: + set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); + } + nfs4_schedule_lease_recovery(clp); +} +EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); + +static void nfs41_ping_server(struct nfs_client *clp) +{ + /* Use CHECK_LEASE to ping the server with a SEQUENCE */ + set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); + nfs4_schedule_state_manager(clp); +} + +void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) { - set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); - nfs4_schedule_state_recovery(clp); + nfs41_ping_server(clp); +} + +void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) +{ + nfs41_ping_server(clp); } static void nfs4_reset_all_state(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { - clp->cl_boot_time = CURRENT_TIME; + set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); + clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); nfs4_state_start_reclaim_nograce(clp); - nfs4_schedule_state_recovery(clp); + dprintk("%s: scheduling reset of all state for server %s!\n", + __func__, clp->cl_hostname); + nfs4_schedule_state_manager(clp); } } @@ -1328,168 +2183,173 @@ static void nfs41_handle_server_reboot(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { nfs4_state_start_reclaim_reboot(clp); - nfs4_schedule_state_recovery(clp); + dprintk("%s: server %s rebooted!\n", __func__, + clp->cl_hostname); + nfs4_schedule_state_manager(clp); } } static void nfs41_handle_state_revoked(struct nfs_client *clp) { - /* Temporary */ nfs4_reset_all_state(clp); + dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); } static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) { /* This will need to handle layouts too */ nfs_expire_all_delegations(clp); + dprintk("%s: Recallable state revoked on server %s!\n", __func__, + clp->cl_hostname); } -static void nfs41_handle_cb_path_down(struct nfs_client *clp) +static void nfs41_handle_backchannel_fault(struct nfs_client *clp) { nfs_expire_all_delegations(clp); if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) - nfs4_schedule_state_recovery(clp); + nfs4_schedule_state_manager(clp); + dprintk("%s: server %s declared a backchannel fault\n", __func__, + clp->cl_hostname); +} + +static void nfs41_handle_cb_path_down(struct nfs_client *clp) +{ + if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, + &clp->cl_state) == 0) + nfs4_schedule_state_manager(clp); } void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) { if (!flags) return; - else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) + + dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", + __func__, clp->cl_hostname, clp->cl_clientid, flags); + + if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) nfs41_handle_server_reboot(clp); - else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | + if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | - SEQ4_STATUS_ADMIN_STATE_REVOKED | - SEQ4_STATUS_LEASE_MOVED)) + SEQ4_STATUS_ADMIN_STATE_REVOKED)) nfs41_handle_state_revoked(clp); - else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) + if (flags & SEQ4_STATUS_LEASE_MOVED) + nfs4_schedule_lease_moved_recovery(clp); + if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) nfs41_handle_recallable_state_revoked(clp); + if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) + nfs41_handle_backchannel_fault(clp); else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | - SEQ4_STATUS_BACKCHANNEL_FAULT | - SEQ4_STATUS_CB_PATH_DOWN_SESSION)) + SEQ4_STATUS_CB_PATH_DOWN_SESSION)) nfs41_handle_cb_path_down(clp); } static int nfs4_reset_session(struct nfs_client *clp) { + struct rpc_cred *cred; int status; + if (!nfs4_has_session(clp)) + return 0; nfs4_begin_drain_session(clp); - status = nfs4_proc_destroy_session(clp->cl_session); - if (status && status != -NFS4ERR_BADSESSION && - status != -NFS4ERR_DEADSESSION) { + cred = nfs4_get_clid_cred(clp); + status = nfs4_proc_destroy_session(clp->cl_session, cred); + switch (status) { + case 0: + case -NFS4ERR_BADSESSION: + case -NFS4ERR_DEADSESSION: + break; + case -NFS4ERR_BACK_CHAN_BUSY: + case -NFS4ERR_DELAY: + set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); + status = 0; + ssleep(1); + goto out; + default: status = nfs4_recovery_handle_error(clp, status); goto out; } memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); - status = nfs4_proc_create_session(clp); + status = nfs4_proc_create_session(clp, cred); if (status) { - status = nfs4_recovery_handle_error(clp, status); + dprintk("%s: session reset failed with status %d for server %s!\n", + __func__, status, clp->cl_hostname); + status = nfs4_handle_reclaim_lease_error(clp, status); goto out; } - /* create_session negotiated new slot table */ - clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); - - /* Let the state manager reestablish state */ - if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) - nfs41_setup_state_renewal(clp); + nfs41_finish_session_reset(clp); + dprintk("%s: session reset was successful for server %s!\n", + __func__, clp->cl_hostname); out: + if (cred) + put_rpccred(cred); return status; } -static int nfs4_recall_slot(struct nfs_client *clp) +static int nfs4_bind_conn_to_session(struct nfs_client *clp) { - struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; - struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; - struct nfs4_slot *new, *old; - int i; + struct rpc_cred *cred; + int ret; + if (!nfs4_has_session(clp)) + return 0; nfs4_begin_drain_session(clp); - new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), - GFP_NOFS); - if (!new) - return -ENOMEM; - - spin_lock(&fc_tbl->slot_tbl_lock); - for (i = 0; i < fc_tbl->target_max_slots; i++) - new[i].seq_nr = fc_tbl->slots[i].seq_nr; - old = fc_tbl->slots; - fc_tbl->slots = new; - fc_tbl->max_slots = fc_tbl->target_max_slots; - fc_tbl->target_max_slots = 0; - fc_attrs->max_reqs = fc_tbl->max_slots; - spin_unlock(&fc_tbl->slot_tbl_lock); - - kfree(old); - nfs4_end_drain_session(clp); + cred = nfs4_get_clid_cred(clp); + ret = nfs4_proc_bind_conn_to_session(clp, cred); + if (cred) + put_rpccred(cred); + clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); + switch (ret) { + case 0: + dprintk("%s: bind_conn_to_session was successful for server %s!\n", + __func__, clp->cl_hostname); + break; + case -NFS4ERR_DELAY: + ssleep(1); + set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); + break; + default: + return nfs4_recovery_handle_error(clp, ret); + } return 0; } - #else /* CONFIG_NFS_V4_1 */ static int nfs4_reset_session(struct nfs_client *clp) { return 0; } -static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } -static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } -#endif /* CONFIG_NFS_V4_1 */ -/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors - * on EXCHANGE_ID for v4.1 - */ -static void nfs4_set_lease_expired(struct nfs_client *clp, int status) +static int nfs4_bind_conn_to_session(struct nfs_client *clp) { - if (nfs4_has_session(clp)) { - switch (status) { - case -NFS4ERR_DELAY: - case -NFS4ERR_CLID_INUSE: - case -EAGAIN: - break; - - case -EKEYEXPIRED: - nfs4_warn_keyexpired(clp->cl_hostname); - case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery - * in nfs4_exchange_id */ - default: - return; - } - } - set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); + return 0; } +#endif /* CONFIG_NFS_V4_1 */ static void nfs4_state_manager(struct nfs_client *clp) { int status = 0; + const char *section = "", *section_sep = ""; /* Ensure exclusive access to NFSv4 state */ - for(;;) { - if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { - /* We're going to have to re-establish a clientid */ - status = nfs4_reclaim_lease(clp); - if (status) { - nfs4_set_lease_expired(clp, status); - if (test_bit(NFS4CLNT_LEASE_EXPIRED, - &clp->cl_state)) - continue; - if (clp->cl_cons_state == - NFS_CS_SESSION_INITING) - nfs_mark_client_ready(clp, status); + do { + if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { + section = "purge state"; + status = nfs4_purge_lease(clp); + if (status < 0) goto out_error; - } - clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); - set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); - pnfs_destroy_all_layouts(clp); + continue; } - if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { - status = nfs4_check_lease(clp); - if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) - continue; - if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) + if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { + section = "lease expired"; + /* We're going to have to re-establish a clientid */ + status = nfs4_reclaim_lease(clp); + if (status < 0) goto out_error; + continue; } /* Initialize or reset the session */ - if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) - && nfs4_has_session(clp)) { + if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { + section = "reset session"; status = nfs4_reset_session(clp); if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) continue; @@ -1497,8 +2357,40 @@ static void nfs4_state_manager(struct nfs_client *clp) goto out_error; } + /* Send BIND_CONN_TO_SESSION */ + if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, + &clp->cl_state)) { + section = "bind conn to session"; + status = nfs4_bind_conn_to_session(clp); + if (status < 0) + goto out_error; + continue; + } + + if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { + section = "check lease"; + status = nfs4_check_lease(clp); + if (status < 0) + goto out_error; + } + + if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { + section = "migration"; + status = nfs4_handle_migration(clp); + if (status < 0) + goto out_error; + } + + if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { + section = "lease moved"; + status = nfs4_handle_lease_moved(clp); + if (status < 0) + goto out_error; + } + /* First recover reboot state... */ if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { + section = "reclaim reboot"; status = nfs4_do_reclaim(clp, clp->cl_mvops->reboot_recovery_ops); if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || @@ -1513,6 +2405,7 @@ static void nfs4_state_manager(struct nfs_client *clp) /* Now recover expired state... */ if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { + section = "reclaim nograce"; status = nfs4_do_reclaim(clp, clp->cl_mvops->nograce_recovery_ops); if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || @@ -1528,15 +2421,6 @@ static void nfs4_state_manager(struct nfs_client *clp) nfs_client_return_marked_delegations(clp); continue; } - /* Recall session slots */ - if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) - && nfs4_has_session(clp)) { - status = nfs4_recall_slot(clp); - if (status < 0) - goto out_error; - continue; - } - nfs4_clear_state_manager_bit(clp); /* Did we race with an attempt to give us more work? */ @@ -1544,11 +2428,15 @@ static void nfs4_state_manager(struct nfs_client *clp) break; if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) break; - } + } while (atomic_read(&clp->cl_count) > 1); return; out_error: - printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" - " with error %d\n", clp->cl_hostname, -status); + if (strlen(section)) + section_sep = ": "; + pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" + " with error %d\n", section_sep, section, + clp->cl_hostname, -status); + ssleep(1); nfs4_end_drain_session(clp); nfs4_clear_state_manager_bit(clp); } diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c new file mode 100644 index 00000000000..6f340f02f2b --- /dev/null +++ b/fs/nfs/nfs4super.c @@ -0,0 +1,358 @@ +/* + * Copyright (c) 2012 Bryan Schumaker <bjschuma@netapp.com> + */ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/nfs_idmap.h> +#include <linux/nfs4_mount.h> +#include <linux/nfs_fs.h> +#include "delegation.h" +#include "internal.h" +#include "nfs4_fs.h" +#include "dns_resolve.h" +#include "pnfs.h" +#include "nfs.h" + +#define NFSDBG_FACILITY NFSDBG_VFS + +static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc); +static void nfs4_evict_inode(struct inode *inode); +static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); + +static struct file_system_type nfs4_remote_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .mount = nfs4_remote_mount, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; + +static struct file_system_type nfs4_remote_referral_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .mount = nfs4_remote_referral_mount, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; + +struct file_system_type nfs4_referral_fs_type = { + .owner = THIS_MODULE, + .name = "nfs4", + .mount = nfs4_referral_mount, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, +}; + +static const struct super_operations nfs4_sops = { + .alloc_inode = nfs_alloc_inode, + .destroy_inode = nfs_destroy_inode, + .write_inode = nfs4_write_inode, + .drop_inode = nfs_drop_inode, + .put_super = nfs_put_super, + .statfs = nfs_statfs, + .evict_inode = nfs4_evict_inode, + .umount_begin = nfs_umount_begin, + .show_options = nfs_show_options, + .show_devname = nfs_show_devname, + .show_path = nfs_show_path, + .show_stats = nfs_show_stats, + .remount_fs = nfs_remount, +}; + +struct nfs_subversion nfs_v4 = { + .owner = THIS_MODULE, + .nfs_fs = &nfs4_fs_type, + .rpc_vers = &nfs_version4, + .rpc_ops = &nfs_v4_clientops, + .sops = &nfs4_sops, + .xattr = nfs4_xattr_handlers, +}; + +static int nfs4_write_inode(struct inode *inode, struct writeback_control *wbc) +{ + int ret = nfs_write_inode(inode, wbc); + + if (ret == 0) + ret = pnfs_layoutcommit_inode(inode, + wbc->sync_mode == WB_SYNC_ALL); + return ret; +} + +/* + * Clean out any remaining NFSv4 state that might be left over due + * to open() calls that passed nfs_atomic_lookup, but failed to call + * nfs_open(). + */ +static void nfs4_evict_inode(struct inode *inode) +{ + truncate_inode_pages_final(&inode->i_data); + clear_inode(inode); + pnfs_return_layout(inode); + pnfs_destroy_layout(NFS_I(inode)); + /* If we are holding a delegation, return it! */ + nfs_inode_return_delegation_noreclaim(inode); + /* First call standard NFS clear_inode() code */ + nfs_clear_inode(inode); +} + +/* + * Get the superblock for the NFS4 root partition + */ +static struct dentry * +nfs4_remote_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *info) +{ + struct nfs_mount_info *mount_info = info; + struct nfs_server *server; + struct dentry *mntroot = ERR_PTR(-ENOMEM); + + mount_info->set_security = nfs_set_sb_security; + + /* Get a volume representation */ + server = nfs4_create_server(mount_info, &nfs_v4); + if (IS_ERR(server)) { + mntroot = ERR_CAST(server); + goto out; + } + + mntroot = nfs_fs_mount_common(server, flags, dev_name, mount_info, &nfs_v4); + +out: + return mntroot; +} + +static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, + int flags, void *data, const char *hostname) +{ + struct vfsmount *root_mnt; + char *root_devname; + size_t len; + + len = strlen(hostname) + 5; + root_devname = kmalloc(len, GFP_KERNEL); + if (root_devname == NULL) + return ERR_PTR(-ENOMEM); + /* Does hostname needs to be enclosed in brackets? */ + if (strchr(hostname, ':')) + snprintf(root_devname, len, "[%s]:/", hostname); + else + snprintf(root_devname, len, "%s:/", hostname); + root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); + kfree(root_devname); + return root_mnt; +} + +struct nfs_referral_count { + struct list_head list; + const struct task_struct *task; + unsigned int referral_count; +}; + +static LIST_HEAD(nfs_referral_count_list); +static DEFINE_SPINLOCK(nfs_referral_count_list_lock); + +static struct nfs_referral_count *nfs_find_referral_count(void) +{ + struct nfs_referral_count *p; + + list_for_each_entry(p, &nfs_referral_count_list, list) { + if (p->task == current) + return p; + } + return NULL; +} + +#define NFS_MAX_NESTED_REFERRALS 2 + +static int nfs_referral_loop_protect(void) +{ + struct nfs_referral_count *p, *new; + int ret = -ENOMEM; + + new = kmalloc(sizeof(*new), GFP_KERNEL); + if (!new) + goto out; + new->task = current; + new->referral_count = 1; + + ret = 0; + spin_lock(&nfs_referral_count_list_lock); + p = nfs_find_referral_count(); + if (p != NULL) { + if (p->referral_count >= NFS_MAX_NESTED_REFERRALS) + ret = -ELOOP; + else + p->referral_count++; + } else { + list_add(&new->list, &nfs_referral_count_list); + new = NULL; + } + spin_unlock(&nfs_referral_count_list_lock); + kfree(new); +out: + return ret; +} + +static void nfs_referral_loop_unprotect(void) +{ + struct nfs_referral_count *p; + + spin_lock(&nfs_referral_count_list_lock); + p = nfs_find_referral_count(); + p->referral_count--; + if (p->referral_count == 0) + list_del(&p->list); + else + p = NULL; + spin_unlock(&nfs_referral_count_list_lock); + kfree(p); +} + +static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt, + const char *export_path) +{ + struct dentry *dentry; + int err; + + if (IS_ERR(root_mnt)) + return ERR_CAST(root_mnt); + + err = nfs_referral_loop_protect(); + if (err) { + mntput(root_mnt); + return ERR_PTR(err); + } + + dentry = mount_subtree(root_mnt, export_path); + nfs_referral_loop_unprotect(); + + return dentry; +} + +struct dentry *nfs4_try_mount(int flags, const char *dev_name, + struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) +{ + char *export_path; + struct vfsmount *root_mnt; + struct dentry *res; + struct nfs_parsed_mount_data *data = mount_info->parsed; + + dfprintk(MOUNT, "--> nfs4_try_mount()\n"); + + export_path = data->nfs_server.export_path; + data->nfs_server.export_path = "/"; + root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, mount_info, + data->nfs_server.hostname); + data->nfs_server.export_path = export_path; + + res = nfs_follow_remote_path(root_mnt, export_path); + + dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", + PTR_ERR_OR_ZERO(res), + IS_ERR(res) ? " [error]" : ""); + return res; +} + +static struct dentry * +nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) +{ + struct nfs_mount_info mount_info = { + .fill_super = nfs_fill_super, + .set_security = nfs_clone_sb_security, + .cloned = raw_data, + }; + struct nfs_server *server; + struct dentry *mntroot = ERR_PTR(-ENOMEM); + + dprintk("--> nfs4_referral_get_sb()\n"); + + mount_info.mntfh = nfs_alloc_fhandle(); + if (mount_info.cloned == NULL || mount_info.mntfh == NULL) + goto out; + + /* create a new volume representation */ + server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); + if (IS_ERR(server)) { + mntroot = ERR_CAST(server); + goto out; + } + + mntroot = nfs_fs_mount_common(server, flags, dev_name, &mount_info, &nfs_v4); +out: + nfs_free_fhandle(mount_info.mntfh); + return mntroot; +} + +/* + * Create an NFS4 server record on referral traversal + */ +static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + struct nfs_clone_mount *data = raw_data; + char *export_path; + struct vfsmount *root_mnt; + struct dentry *res; + + dprintk("--> nfs4_referral_mount()\n"); + + export_path = data->mnt_path; + data->mnt_path = "/"; + + root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, + flags, data, data->hostname); + data->mnt_path = export_path; + + res = nfs_follow_remote_path(root_mnt, export_path); + dprintk("<-- nfs4_referral_mount() = %d%s\n", + PTR_ERR_OR_ZERO(res), + IS_ERR(res) ? " [error]" : ""); + return res; +} + + +static int __init init_nfs_v4(void) +{ + int err; + + err = nfs_dns_resolver_init(); + if (err) + goto out; + + err = nfs_idmap_init(); + if (err) + goto out1; + + err = nfs4_register_sysctl(); + if (err) + goto out2; + + register_nfs_version(&nfs_v4); + return 0; +out2: + nfs_idmap_quit(); +out1: + nfs_dns_resolver_destroy(); +out: + return err; +} + +static void __exit exit_nfs_v4(void) +{ + unregister_nfs_version(&nfs_v4); + nfs4_unregister_sysctl(); + nfs_idmap_quit(); + nfs_dns_resolver_destroy(); +} + +MODULE_LICENSE("GPL"); + +module_init(init_nfs_v4); +module_exit(exit_nfs_v4); diff --git a/fs/nfs/nfs4sysctl.c b/fs/nfs/nfs4sysctl.c new file mode 100644 index 00000000000..b6ebe7e445f --- /dev/null +++ b/fs/nfs/nfs4sysctl.c @@ -0,0 +1,69 @@ +/* + * linux/fs/nfs/nfs4sysctl.c + * + * Sysctl interface to NFS v4 parameters + * + * Copyright (c) 2006 Trond Myklebust <Trond.Myklebust@netapp.com> + */ +#include <linux/sysctl.h> +#include <linux/nfs_idmap.h> +#include <linux/nfs_fs.h> + +#include "nfs4_fs.h" +#include "callback.h" + +static const int nfs_set_port_min = 0; +static const int nfs_set_port_max = 65535; +static struct ctl_table_header *nfs4_callback_sysctl_table; + +static struct ctl_table nfs4_cb_sysctls[] = { + { + .procname = "nfs_callback_tcpport", + .data = &nfs_callback_set_tcpport, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = (int *)&nfs_set_port_min, + .extra2 = (int *)&nfs_set_port_max, + }, + { + .procname = "idmap_cache_timeout", + .data = &nfs_idmap_cache_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_jiffies, + }, + { } +}; + +static struct ctl_table nfs4_cb_sysctl_dir[] = { + { + .procname = "nfs", + .mode = 0555, + .child = nfs4_cb_sysctls, + }, + { } +}; + +static struct ctl_table nfs4_cb_sysctl_root[] = { + { + .procname = "fs", + .mode = 0555, + .child = nfs4_cb_sysctl_dir, + }, + { } +}; + +int nfs4_register_sysctl(void) +{ + nfs4_callback_sysctl_table = register_sysctl_table(nfs4_cb_sysctl_root); + if (nfs4_callback_sysctl_table == NULL) + return -ENOMEM; + return 0; +} + +void nfs4_unregister_sysctl(void) +{ + unregister_sysctl_table(nfs4_callback_sysctl_table); + nfs4_callback_sysctl_table = NULL; +} diff --git a/fs/nfs/nfs4trace.c b/fs/nfs/nfs4trace.c new file mode 100644 index 00000000000..d774335cc8b --- /dev/null +++ b/fs/nfs/nfs4trace.c @@ -0,0 +1,17 @@ +/* + * Copyright (c) 2013 Trond Myklebust <Trond.Myklebust@netapp.com> + */ +#include <linux/nfs_fs.h> +#include "nfs4_fs.h" +#include "internal.h" +#include "nfs4session.h" +#include "callback.h" + +#define CREATE_TRACE_POINTS +#include "nfs4trace.h" + +#ifdef CONFIG_NFS_V4_1 +EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_read); +EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_write); +EXPORT_TRACEPOINT_SYMBOL_GPL(nfs4_pnfs_commit_ds); +#endif diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h new file mode 100644 index 00000000000..0a744f3a86f --- /dev/null +++ b/fs/nfs/nfs4trace.h @@ -0,0 +1,1148 @@ +/* + * Copyright (c) 2013 Trond Myklebust <Trond.Myklebust@netapp.com> + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM nfs4 + +#if !defined(_TRACE_NFS4_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_NFS4_H + +#include <linux/tracepoint.h> + +#define show_nfsv4_errors(error) \ + __print_symbolic(error, \ + { NFS4_OK, "OK" }, \ + /* Mapped by nfs4_stat_to_errno() */ \ + { -EPERM, "EPERM" }, \ + { -ENOENT, "ENOENT" }, \ + { -EIO, "EIO" }, \ + { -ENXIO, "ENXIO" }, \ + { -EACCES, "EACCES" }, \ + { -EEXIST, "EEXIST" }, \ + { -EXDEV, "EXDEV" }, \ + { -ENOTDIR, "ENOTDIR" }, \ + { -EISDIR, "EISDIR" }, \ + { -EFBIG, "EFBIG" }, \ + { -ENOSPC, "ENOSPC" }, \ + { -EROFS, "EROFS" }, \ + { -EMLINK, "EMLINK" }, \ + { -ENAMETOOLONG, "ENAMETOOLONG" }, \ + { -ENOTEMPTY, "ENOTEMPTY" }, \ + { -EDQUOT, "EDQUOT" }, \ + { -ESTALE, "ESTALE" }, \ + { -EBADHANDLE, "EBADHANDLE" }, \ + { -EBADCOOKIE, "EBADCOOKIE" }, \ + { -ENOTSUPP, "ENOTSUPP" }, \ + { -ETOOSMALL, "ETOOSMALL" }, \ + { -EREMOTEIO, "EREMOTEIO" }, \ + { -EBADTYPE, "EBADTYPE" }, \ + { -EAGAIN, "EAGAIN" }, \ + { -ELOOP, "ELOOP" }, \ + { -EOPNOTSUPP, "EOPNOTSUPP" }, \ + { -EDEADLK, "EDEADLK" }, \ + /* RPC errors */ \ + { -ENOMEM, "ENOMEM" }, \ + { -EKEYEXPIRED, "EKEYEXPIRED" }, \ + { -ETIMEDOUT, "ETIMEDOUT" }, \ + { -ERESTARTSYS, "ERESTARTSYS" }, \ + { -ECONNREFUSED, "ECONNREFUSED" }, \ + { -ECONNRESET, "ECONNRESET" }, \ + { -ENETUNREACH, "ENETUNREACH" }, \ + { -EHOSTUNREACH, "EHOSTUNREACH" }, \ + { -EHOSTDOWN, "EHOSTDOWN" }, \ + { -EPIPE, "EPIPE" }, \ + { -EPFNOSUPPORT, "EPFNOSUPPORT" }, \ + { -EPROTONOSUPPORT, "EPROTONOSUPPORT" }, \ + /* NFSv4 native errors */ \ + { -NFS4ERR_ACCESS, "ACCESS" }, \ + { -NFS4ERR_ATTRNOTSUPP, "ATTRNOTSUPP" }, \ + { -NFS4ERR_ADMIN_REVOKED, "ADMIN_REVOKED" }, \ + { -NFS4ERR_BACK_CHAN_BUSY, "BACK_CHAN_BUSY" }, \ + { -NFS4ERR_BADCHAR, "BADCHAR" }, \ + { -NFS4ERR_BADHANDLE, "BADHANDLE" }, \ + { -NFS4ERR_BADIOMODE, "BADIOMODE" }, \ + { -NFS4ERR_BADLAYOUT, "BADLAYOUT" }, \ + { -NFS4ERR_BADLABEL, "BADLABEL" }, \ + { -NFS4ERR_BADNAME, "BADNAME" }, \ + { -NFS4ERR_BADOWNER, "BADOWNER" }, \ + { -NFS4ERR_BADSESSION, "BADSESSION" }, \ + { -NFS4ERR_BADSLOT, "BADSLOT" }, \ + { -NFS4ERR_BADTYPE, "BADTYPE" }, \ + { -NFS4ERR_BADXDR, "BADXDR" }, \ + { -NFS4ERR_BAD_COOKIE, "BAD_COOKIE" }, \ + { -NFS4ERR_BAD_HIGH_SLOT, "BAD_HIGH_SLOT" }, \ + { -NFS4ERR_BAD_RANGE, "BAD_RANGE" }, \ + { -NFS4ERR_BAD_SEQID, "BAD_SEQID" }, \ + { -NFS4ERR_BAD_SESSION_DIGEST, "BAD_SESSION_DIGEST" }, \ + { -NFS4ERR_BAD_STATEID, "BAD_STATEID" }, \ + { -NFS4ERR_CB_PATH_DOWN, "CB_PATH_DOWN" }, \ + { -NFS4ERR_CLID_INUSE, "CLID_INUSE" }, \ + { -NFS4ERR_CLIENTID_BUSY, "CLIENTID_BUSY" }, \ + { -NFS4ERR_COMPLETE_ALREADY, "COMPLETE_ALREADY" }, \ + { -NFS4ERR_CONN_NOT_BOUND_TO_SESSION, \ + "CONN_NOT_BOUND_TO_SESSION" }, \ + { -NFS4ERR_DEADLOCK, "DEADLOCK" }, \ + { -NFS4ERR_DEADSESSION, "DEAD_SESSION" }, \ + { -NFS4ERR_DELAY, "DELAY" }, \ + { -NFS4ERR_DELEG_ALREADY_WANTED, \ + "DELEG_ALREADY_WANTED" }, \ + { -NFS4ERR_DELEG_REVOKED, "DELEG_REVOKED" }, \ + { -NFS4ERR_DENIED, "DENIED" }, \ + { -NFS4ERR_DIRDELEG_UNAVAIL, "DIRDELEG_UNAVAIL" }, \ + { -NFS4ERR_DQUOT, "DQUOT" }, \ + { -NFS4ERR_ENCR_ALG_UNSUPP, "ENCR_ALG_UNSUPP" }, \ + { -NFS4ERR_EXIST, "EXIST" }, \ + { -NFS4ERR_EXPIRED, "EXPIRED" }, \ + { -NFS4ERR_FBIG, "FBIG" }, \ + { -NFS4ERR_FHEXPIRED, "FHEXPIRED" }, \ + { -NFS4ERR_FILE_OPEN, "FILE_OPEN" }, \ + { -NFS4ERR_GRACE, "GRACE" }, \ + { -NFS4ERR_HASH_ALG_UNSUPP, "HASH_ALG_UNSUPP" }, \ + { -NFS4ERR_INVAL, "INVAL" }, \ + { -NFS4ERR_IO, "IO" }, \ + { -NFS4ERR_ISDIR, "ISDIR" }, \ + { -NFS4ERR_LAYOUTTRYLATER, "LAYOUTTRYLATER" }, \ + { -NFS4ERR_LAYOUTUNAVAILABLE, "LAYOUTUNAVAILABLE" }, \ + { -NFS4ERR_LEASE_MOVED, "LEASE_MOVED" }, \ + { -NFS4ERR_LOCKED, "LOCKED" }, \ + { -NFS4ERR_LOCKS_HELD, "LOCKS_HELD" }, \ + { -NFS4ERR_LOCK_RANGE, "LOCK_RANGE" }, \ + { -NFS4ERR_MINOR_VERS_MISMATCH, "MINOR_VERS_MISMATCH" }, \ + { -NFS4ERR_MLINK, "MLINK" }, \ + { -NFS4ERR_MOVED, "MOVED" }, \ + { -NFS4ERR_NAMETOOLONG, "NAMETOOLONG" }, \ + { -NFS4ERR_NOENT, "NOENT" }, \ + { -NFS4ERR_NOFILEHANDLE, "NOFILEHANDLE" }, \ + { -NFS4ERR_NOMATCHING_LAYOUT, "NOMATCHING_LAYOUT" }, \ + { -NFS4ERR_NOSPC, "NOSPC" }, \ + { -NFS4ERR_NOTDIR, "NOTDIR" }, \ + { -NFS4ERR_NOTEMPTY, "NOTEMPTY" }, \ + { -NFS4ERR_NOTSUPP, "NOTSUPP" }, \ + { -NFS4ERR_NOT_ONLY_OP, "NOT_ONLY_OP" }, \ + { -NFS4ERR_NOT_SAME, "NOT_SAME" }, \ + { -NFS4ERR_NO_GRACE, "NO_GRACE" }, \ + { -NFS4ERR_NXIO, "NXIO" }, \ + { -NFS4ERR_OLD_STATEID, "OLD_STATEID" }, \ + { -NFS4ERR_OPENMODE, "OPENMODE" }, \ + { -NFS4ERR_OP_ILLEGAL, "OP_ILLEGAL" }, \ + { -NFS4ERR_OP_NOT_IN_SESSION, "OP_NOT_IN_SESSION" }, \ + { -NFS4ERR_PERM, "PERM" }, \ + { -NFS4ERR_PNFS_IO_HOLE, "PNFS_IO_HOLE" }, \ + { -NFS4ERR_PNFS_NO_LAYOUT, "PNFS_NO_LAYOUT" }, \ + { -NFS4ERR_RECALLCONFLICT, "RECALLCONFLICT" }, \ + { -NFS4ERR_RECLAIM_BAD, "RECLAIM_BAD" }, \ + { -NFS4ERR_RECLAIM_CONFLICT, "RECLAIM_CONFLICT" }, \ + { -NFS4ERR_REJECT_DELEG, "REJECT_DELEG" }, \ + { -NFS4ERR_REP_TOO_BIG, "REP_TOO_BIG" }, \ + { -NFS4ERR_REP_TOO_BIG_TO_CACHE, \ + "REP_TOO_BIG_TO_CACHE" }, \ + { -NFS4ERR_REQ_TOO_BIG, "REQ_TOO_BIG" }, \ + { -NFS4ERR_RESOURCE, "RESOURCE" }, \ + { -NFS4ERR_RESTOREFH, "RESTOREFH" }, \ + { -NFS4ERR_RETRY_UNCACHED_REP, "RETRY_UNCACHED_REP" }, \ + { -NFS4ERR_RETURNCONFLICT, "RETURNCONFLICT" }, \ + { -NFS4ERR_ROFS, "ROFS" }, \ + { -NFS4ERR_SAME, "SAME" }, \ + { -NFS4ERR_SHARE_DENIED, "SHARE_DENIED" }, \ + { -NFS4ERR_SEQUENCE_POS, "SEQUENCE_POS" }, \ + { -NFS4ERR_SEQ_FALSE_RETRY, "SEQ_FALSE_RETRY" }, \ + { -NFS4ERR_SEQ_MISORDERED, "SEQ_MISORDERED" }, \ + { -NFS4ERR_SERVERFAULT, "SERVERFAULT" }, \ + { -NFS4ERR_STALE, "STALE" }, \ + { -NFS4ERR_STALE_CLIENTID, "STALE_CLIENTID" }, \ + { -NFS4ERR_STALE_STATEID, "STALE_STATEID" }, \ + { -NFS4ERR_SYMLINK, "SYMLINK" }, \ + { -NFS4ERR_TOOSMALL, "TOOSMALL" }, \ + { -NFS4ERR_TOO_MANY_OPS, "TOO_MANY_OPS" }, \ + { -NFS4ERR_UNKNOWN_LAYOUTTYPE, "UNKNOWN_LAYOUTTYPE" }, \ + { -NFS4ERR_UNSAFE_COMPOUND, "UNSAFE_COMPOUND" }, \ + { -NFS4ERR_WRONGSEC, "WRONGSEC" }, \ + { -NFS4ERR_WRONG_CRED, "WRONG_CRED" }, \ + { -NFS4ERR_WRONG_TYPE, "WRONG_TYPE" }, \ + { -NFS4ERR_XDEV, "XDEV" }) + +#define show_open_flags(flags) \ + __print_flags(flags, "|", \ + { O_CREAT, "O_CREAT" }, \ + { O_EXCL, "O_EXCL" }, \ + { O_TRUNC, "O_TRUNC" }, \ + { O_DIRECT, "O_DIRECT" }) + +#define show_fmode_flags(mode) \ + __print_flags(mode, "|", \ + { ((__force unsigned long)FMODE_READ), "READ" }, \ + { ((__force unsigned long)FMODE_WRITE), "WRITE" }, \ + { ((__force unsigned long)FMODE_EXEC), "EXEC" }) + +#define show_nfs_fattr_flags(valid) \ + __print_flags((unsigned long)valid, "|", \ + { NFS_ATTR_FATTR_TYPE, "TYPE" }, \ + { NFS_ATTR_FATTR_MODE, "MODE" }, \ + { NFS_ATTR_FATTR_NLINK, "NLINK" }, \ + { NFS_ATTR_FATTR_OWNER, "OWNER" }, \ + { NFS_ATTR_FATTR_GROUP, "GROUP" }, \ + { NFS_ATTR_FATTR_RDEV, "RDEV" }, \ + { NFS_ATTR_FATTR_SIZE, "SIZE" }, \ + { NFS_ATTR_FATTR_FSID, "FSID" }, \ + { NFS_ATTR_FATTR_FILEID, "FILEID" }, \ + { NFS_ATTR_FATTR_ATIME, "ATIME" }, \ + { NFS_ATTR_FATTR_MTIME, "MTIME" }, \ + { NFS_ATTR_FATTR_CTIME, "CTIME" }, \ + { NFS_ATTR_FATTR_CHANGE, "CHANGE" }, \ + { NFS_ATTR_FATTR_OWNER_NAME, "OWNER_NAME" }, \ + { NFS_ATTR_FATTR_GROUP_NAME, "GROUP_NAME" }) + +DECLARE_EVENT_CLASS(nfs4_clientid_event, + TP_PROTO( + const struct nfs_client *clp, + int error + ), + + TP_ARGS(clp, error), + + TP_STRUCT__entry( + __string(dstaddr, + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_ADDR)) + __field(int, error) + ), + + TP_fast_assign( + __entry->error = error; + __assign_str(dstaddr, + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_ADDR)); + ), + + TP_printk( + "error=%d (%s) dstaddr=%s", + __entry->error, + show_nfsv4_errors(__entry->error), + __get_str(dstaddr) + ) +); +#define DEFINE_NFS4_CLIENTID_EVENT(name) \ + DEFINE_EVENT(nfs4_clientid_event, name, \ + TP_PROTO( \ + const struct nfs_client *clp, \ + int error \ + ), \ + TP_ARGS(clp, error)) +DEFINE_NFS4_CLIENTID_EVENT(nfs4_setclientid); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_setclientid_confirm); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_renew); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_renew_async); +#ifdef CONFIG_NFS_V4_1 +DEFINE_NFS4_CLIENTID_EVENT(nfs4_exchange_id); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_create_session); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_destroy_session); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_destroy_clientid); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_bind_conn_to_session); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_sequence); +DEFINE_NFS4_CLIENTID_EVENT(nfs4_reclaim_complete); + +TRACE_EVENT(nfs4_setup_sequence, + TP_PROTO( + const struct nfs4_session *session, + const struct nfs4_sequence_args *args + ), + TP_ARGS(session, args), + + TP_STRUCT__entry( + __field(unsigned int, session) + __field(unsigned int, slot_nr) + __field(unsigned int, seq_nr) + __field(unsigned int, highest_used_slotid) + ), + + TP_fast_assign( + const struct nfs4_slot *sa_slot = args->sa_slot; + __entry->session = nfs_session_id_hash(&session->sess_id); + __entry->slot_nr = sa_slot->slot_nr; + __entry->seq_nr = sa_slot->seq_nr; + __entry->highest_used_slotid = + sa_slot->table->highest_used_slotid; + ), + TP_printk( + "session=0x%08x slot_nr=%u seq_nr=%u " + "highest_used_slotid=%u", + __entry->session, + __entry->slot_nr, + __entry->seq_nr, + __entry->highest_used_slotid + ) +); + +#define show_nfs4_sequence_status_flags(status) \ + __print_flags((unsigned long)status, "|", \ + { SEQ4_STATUS_CB_PATH_DOWN, "CB_PATH_DOWN" }, \ + { SEQ4_STATUS_CB_GSS_CONTEXTS_EXPIRING, \ + "CB_GSS_CONTEXTS_EXPIRING" }, \ + { SEQ4_STATUS_CB_GSS_CONTEXTS_EXPIRED, \ + "CB_GSS_CONTEXTS_EXPIRED" }, \ + { SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED, \ + "EXPIRED_ALL_STATE_REVOKED" }, \ + { SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED, \ + "EXPIRED_SOME_STATE_REVOKED" }, \ + { SEQ4_STATUS_ADMIN_STATE_REVOKED, \ + "ADMIN_STATE_REVOKED" }, \ + { SEQ4_STATUS_RECALLABLE_STATE_REVOKED, \ + "RECALLABLE_STATE_REVOKED" }, \ + { SEQ4_STATUS_LEASE_MOVED, "LEASE_MOVED" }, \ + { SEQ4_STATUS_RESTART_RECLAIM_NEEDED, \ + "RESTART_RECLAIM_NEEDED" }, \ + { SEQ4_STATUS_CB_PATH_DOWN_SESSION, \ + "CB_PATH_DOWN_SESSION" }, \ + { SEQ4_STATUS_BACKCHANNEL_FAULT, \ + "BACKCHANNEL_FAULT" }) + +TRACE_EVENT(nfs4_sequence_done, + TP_PROTO( + const struct nfs4_session *session, + const struct nfs4_sequence_res *res + ), + TP_ARGS(session, res), + + TP_STRUCT__entry( + __field(unsigned int, session) + __field(unsigned int, slot_nr) + __field(unsigned int, seq_nr) + __field(unsigned int, highest_slotid) + __field(unsigned int, target_highest_slotid) + __field(unsigned int, status_flags) + __field(int, error) + ), + + TP_fast_assign( + const struct nfs4_slot *sr_slot = res->sr_slot; + __entry->session = nfs_session_id_hash(&session->sess_id); + __entry->slot_nr = sr_slot->slot_nr; + __entry->seq_nr = sr_slot->seq_nr; + __entry->highest_slotid = res->sr_highest_slotid; + __entry->target_highest_slotid = + res->sr_target_highest_slotid; + __entry->error = res->sr_status; + ), + TP_printk( + "error=%d (%s) session=0x%08x slot_nr=%u seq_nr=%u " + "highest_slotid=%u target_highest_slotid=%u " + "status_flags=%u (%s)", + __entry->error, + show_nfsv4_errors(__entry->error), + __entry->session, + __entry->slot_nr, + __entry->seq_nr, + __entry->highest_slotid, + __entry->target_highest_slotid, + __entry->status_flags, + show_nfs4_sequence_status_flags(__entry->status_flags) + ) +); + +struct cb_sequenceargs; +struct cb_sequenceres; + +TRACE_EVENT(nfs4_cb_sequence, + TP_PROTO( + const struct cb_sequenceargs *args, + const struct cb_sequenceres *res, + __be32 status + ), + TP_ARGS(args, res, status), + + TP_STRUCT__entry( + __field(unsigned int, session) + __field(unsigned int, slot_nr) + __field(unsigned int, seq_nr) + __field(unsigned int, highest_slotid) + __field(unsigned int, cachethis) + __field(int, error) + ), + + TP_fast_assign( + __entry->session = nfs_session_id_hash(&args->csa_sessionid); + __entry->slot_nr = args->csa_slotid; + __entry->seq_nr = args->csa_sequenceid; + __entry->highest_slotid = args->csa_highestslotid; + __entry->cachethis = args->csa_cachethis; + __entry->error = -be32_to_cpu(status); + ), + + TP_printk( + "error=%d (%s) session=0x%08x slot_nr=%u seq_nr=%u " + "highest_slotid=%u", + __entry->error, + show_nfsv4_errors(__entry->error), + __entry->session, + __entry->slot_nr, + __entry->seq_nr, + __entry->highest_slotid + ) +); +#endif /* CONFIG_NFS_V4_1 */ + +DECLARE_EVENT_CLASS(nfs4_open_event, + TP_PROTO( + const struct nfs_open_context *ctx, + int flags, + int error + ), + + TP_ARGS(ctx, flags, error), + + TP_STRUCT__entry( + __field(int, error) + __field(unsigned int, flags) + __field(unsigned int, fmode) + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(u64, dir) + __string(name, ctx->dentry->d_name.name) + ), + + TP_fast_assign( + const struct nfs4_state *state = ctx->state; + const struct inode *inode = NULL; + + __entry->error = error; + __entry->flags = flags; + __entry->fmode = (__force unsigned int)ctx->mode; + __entry->dev = ctx->dentry->d_sb->s_dev; + if (!IS_ERR(state)) + inode = state->inode; + if (inode != NULL) { + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + } else { + __entry->fileid = 0; + __entry->fhandle = 0; + } + __entry->dir = NFS_FILEID(ctx->dentry->d_parent->d_inode); + __assign_str(name, ctx->dentry->d_name.name); + ), + + TP_printk( + "error=%d (%s) flags=%d (%s) fmode=%s " + "fileid=%02x:%02x:%llu fhandle=0x%08x " + "name=%02x:%02x:%llu/%s", + __entry->error, + show_nfsv4_errors(__entry->error), + __entry->flags, + show_open_flags(__entry->flags), + show_fmode_flags(__entry->fmode), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS4_OPEN_EVENT(name) \ + DEFINE_EVENT(nfs4_open_event, name, \ + TP_PROTO( \ + const struct nfs_open_context *ctx, \ + int flags, \ + int error \ + ), \ + TP_ARGS(ctx, flags, error)) +DEFINE_NFS4_OPEN_EVENT(nfs4_open_reclaim); +DEFINE_NFS4_OPEN_EVENT(nfs4_open_expired); +DEFINE_NFS4_OPEN_EVENT(nfs4_open_file); + +TRACE_EVENT(nfs4_close, + TP_PROTO( + const struct nfs4_state *state, + const struct nfs_closeargs *args, + const struct nfs_closeres *res, + int error + ), + + TP_ARGS(state, args, res, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(unsigned int, fmode) + __field(int, error) + ), + + TP_fast_assign( + const struct inode *inode = state->inode; + + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->fmode = (__force unsigned int)state->state; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fmode=%s fileid=%02x:%02x:%llu " + "fhandle=0x%08x", + __entry->error, + show_nfsv4_errors(__entry->error), + __entry->fmode ? show_fmode_flags(__entry->fmode) : + "closed", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle + ) +); + +#define show_lock_cmd(type) \ + __print_symbolic((int)type, \ + { F_GETLK, "GETLK" }, \ + { F_SETLK, "SETLK" }, \ + { F_SETLKW, "SETLKW" }) +#define show_lock_type(type) \ + __print_symbolic((int)type, \ + { F_RDLCK, "RDLCK" }, \ + { F_WRLCK, "WRLCK" }, \ + { F_UNLCK, "UNLCK" }) + +DECLARE_EVENT_CLASS(nfs4_lock_event, + TP_PROTO( + const struct file_lock *request, + const struct nfs4_state *state, + int cmd, + int error + ), + + TP_ARGS(request, state, cmd, error), + + TP_STRUCT__entry( + __field(int, error) + __field(int, cmd) + __field(char, type) + __field(loff_t, start) + __field(loff_t, end) + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + ), + + TP_fast_assign( + const struct inode *inode = state->inode; + + __entry->error = error; + __entry->cmd = cmd; + __entry->type = request->fl_type; + __entry->start = request->fl_start; + __entry->end = request->fl_end; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + ), + + TP_printk( + "error=%d (%s) cmd=%s:%s range=%lld:%lld " + "fileid=%02x:%02x:%llu fhandle=0x%08x", + __entry->error, + show_nfsv4_errors(__entry->error), + show_lock_cmd(__entry->cmd), + show_lock_type(__entry->type), + (long long)__entry->start, + (long long)__entry->end, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle + ) +); + +#define DEFINE_NFS4_LOCK_EVENT(name) \ + DEFINE_EVENT(nfs4_lock_event, name, \ + TP_PROTO( \ + const struct file_lock *request, \ + const struct nfs4_state *state, \ + int cmd, \ + int error \ + ), \ + TP_ARGS(request, state, cmd, error)) +DEFINE_NFS4_LOCK_EVENT(nfs4_get_lock); +DEFINE_NFS4_LOCK_EVENT(nfs4_set_lock); +DEFINE_NFS4_LOCK_EVENT(nfs4_lock_reclaim); +DEFINE_NFS4_LOCK_EVENT(nfs4_lock_expired); +DEFINE_NFS4_LOCK_EVENT(nfs4_unlock); + +DECLARE_EVENT_CLASS(nfs4_set_delegation_event, + TP_PROTO( + const struct inode *inode, + fmode_t fmode + ), + + TP_ARGS(inode, fmode), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(unsigned int, fmode) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->fmode = (__force unsigned int)fmode; + ), + + TP_printk( + "fmode=%s fileid=%02x:%02x:%llu fhandle=0x%08x", + show_fmode_flags(__entry->fmode), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle + ) +); +#define DEFINE_NFS4_SET_DELEGATION_EVENT(name) \ + DEFINE_EVENT(nfs4_set_delegation_event, name, \ + TP_PROTO( \ + const struct inode *inode, \ + fmode_t fmode \ + ), \ + TP_ARGS(inode, fmode)) +DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_set_delegation); +DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_reclaim_delegation); + +TRACE_EVENT(nfs4_delegreturn_exit, + TP_PROTO( + const struct nfs4_delegreturnargs *args, + const struct nfs4_delegreturnres *res, + int error + ), + + TP_ARGS(args, res, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(int, error) + ), + + TP_fast_assign( + __entry->dev = res->server->s_dev; + __entry->fhandle = nfs_fhandle_hash(args->fhandle); + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) dev=%02x:%02x fhandle=0x%08x", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->fhandle + ) +); + +#ifdef CONFIG_NFS_V4_1 +DECLARE_EVENT_CLASS(nfs4_test_stateid_event, + TP_PROTO( + const struct nfs4_state *state, + const struct nfs4_lock_state *lsp, + int error + ), + + TP_ARGS(state, lsp, error), + + TP_STRUCT__entry( + __field(int, error) + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + ), + + TP_fast_assign( + const struct inode *inode = state->inode; + + __entry->error = error; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle + ) +); + +#define DEFINE_NFS4_TEST_STATEID_EVENT(name) \ + DEFINE_EVENT(nfs4_test_stateid_event, name, \ + TP_PROTO( \ + const struct nfs4_state *state, \ + const struct nfs4_lock_state *lsp, \ + int error \ + ), \ + TP_ARGS(state, lsp, error)) +DEFINE_NFS4_TEST_STATEID_EVENT(nfs4_test_delegation_stateid); +DEFINE_NFS4_TEST_STATEID_EVENT(nfs4_test_open_stateid); +DEFINE_NFS4_TEST_STATEID_EVENT(nfs4_test_lock_stateid); +#endif /* CONFIG_NFS_V4_1 */ + +DECLARE_EVENT_CLASS(nfs4_lookup_event, + TP_PROTO( + const struct inode *dir, + const struct qstr *name, + int error + ), + + TP_ARGS(dir, name, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(int, error) + __field(u64, dir) + __string(name, name->name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->error = error; + __assign_str(name, name->name); + ), + + TP_printk( + "error=%d (%s) name=%02x:%02x:%llu/%s", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS4_LOOKUP_EVENT(name) \ + DEFINE_EVENT(nfs4_lookup_event, name, \ + TP_PROTO( \ + const struct inode *dir, \ + const struct qstr *name, \ + int error \ + ), \ + TP_ARGS(dir, name, error)) + +DEFINE_NFS4_LOOKUP_EVENT(nfs4_lookup); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_symlink); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_mkdir); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_mknod); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_remove); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_get_fs_locations); +DEFINE_NFS4_LOOKUP_EVENT(nfs4_secinfo); + +TRACE_EVENT(nfs4_rename, + TP_PROTO( + const struct inode *olddir, + const struct qstr *oldname, + const struct inode *newdir, + const struct qstr *newname, + int error + ), + + TP_ARGS(olddir, oldname, newdir, newname, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(int, error) + __field(u64, olddir) + __string(oldname, oldname->name) + __field(u64, newdir) + __string(newname, newname->name) + ), + + TP_fast_assign( + __entry->dev = olddir->i_sb->s_dev; + __entry->olddir = NFS_FILEID(olddir); + __entry->newdir = NFS_FILEID(newdir); + __entry->error = error; + __assign_str(oldname, oldname->name); + __assign_str(newname, newname->name); + ), + + TP_printk( + "error=%d (%s) oldname=%02x:%02x:%llu/%s " + "newname=%02x:%02x:%llu/%s", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->olddir, + __get_str(oldname), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->newdir, + __get_str(newname) + ) +); + +DECLARE_EVENT_CLASS(nfs4_inode_event, + TP_PROTO( + const struct inode *inode, + int error + ), + + TP_ARGS(inode, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(int, error) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle + ) +); + +#define DEFINE_NFS4_INODE_EVENT(name) \ + DEFINE_EVENT(nfs4_inode_event, name, \ + TP_PROTO( \ + const struct inode *inode, \ + int error \ + ), \ + TP_ARGS(inode, error)) + +DEFINE_NFS4_INODE_EVENT(nfs4_setattr); +DEFINE_NFS4_INODE_EVENT(nfs4_access); +DEFINE_NFS4_INODE_EVENT(nfs4_readlink); +DEFINE_NFS4_INODE_EVENT(nfs4_readdir); +DEFINE_NFS4_INODE_EVENT(nfs4_get_acl); +DEFINE_NFS4_INODE_EVENT(nfs4_set_acl); +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +DEFINE_NFS4_INODE_EVENT(nfs4_get_security_label); +DEFINE_NFS4_INODE_EVENT(nfs4_set_security_label); +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ +DEFINE_NFS4_INODE_EVENT(nfs4_recall_delegation); +DEFINE_NFS4_INODE_EVENT(nfs4_delegreturn); + +DECLARE_EVENT_CLASS(nfs4_getattr_event, + TP_PROTO( + const struct nfs_server *server, + const struct nfs_fh *fhandle, + const struct nfs_fattr *fattr, + int error + ), + + TP_ARGS(server, fhandle, fattr, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(unsigned int, valid) + __field(int, error) + ), + + TP_fast_assign( + __entry->dev = server->s_dev; + __entry->valid = fattr->valid; + __entry->fhandle = nfs_fhandle_hash(fhandle); + __entry->fileid = (fattr->valid & NFS_ATTR_FATTR_FILEID) ? fattr->fileid : 0; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "valid=%s", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + show_nfs_fattr_flags(__entry->valid) + ) +); + +#define DEFINE_NFS4_GETATTR_EVENT(name) \ + DEFINE_EVENT(nfs4_getattr_event, name, \ + TP_PROTO( \ + const struct nfs_server *server, \ + const struct nfs_fh *fhandle, \ + const struct nfs_fattr *fattr, \ + int error \ + ), \ + TP_ARGS(server, fhandle, fattr, error)) +DEFINE_NFS4_GETATTR_EVENT(nfs4_getattr); +DEFINE_NFS4_GETATTR_EVENT(nfs4_lookup_root); +DEFINE_NFS4_GETATTR_EVENT(nfs4_fsinfo); + +DECLARE_EVENT_CLASS(nfs4_idmap_event, + TP_PROTO( + const char *name, + int len, + u32 id, + int error + ), + + TP_ARGS(name, len, id, error), + + TP_STRUCT__entry( + __field(int, error) + __field(u32, id) + __dynamic_array(char, name, len > 0 ? len + 1 : 1) + ), + + TP_fast_assign( + if (len < 0) + len = 0; + __entry->error = error < 0 ? error : 0; + __entry->id = id; + memcpy(__get_dynamic_array(name), name, len); + ((char *)__get_dynamic_array(name))[len] = 0; + ), + + TP_printk( + "error=%d id=%u name=%s", + __entry->error, + __entry->id, + __get_str(name) + ) +); +#define DEFINE_NFS4_IDMAP_EVENT(name) \ + DEFINE_EVENT(nfs4_idmap_event, name, \ + TP_PROTO( \ + const char *name, \ + int len, \ + u32 id, \ + int error \ + ), \ + TP_ARGS(name, len, id, error)) +DEFINE_NFS4_IDMAP_EVENT(nfs4_map_name_to_uid); +DEFINE_NFS4_IDMAP_EVENT(nfs4_map_group_to_gid); +DEFINE_NFS4_IDMAP_EVENT(nfs4_map_uid_to_name); +DEFINE_NFS4_IDMAP_EVENT(nfs4_map_gid_to_group); + +DECLARE_EVENT_CLASS(nfs4_read_event, + TP_PROTO( + const struct nfs_pgio_data *data, + int error + ), + + TP_ARGS(data, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(loff_t, offset) + __field(size_t, count) + __field(int, error) + ), + + TP_fast_assign( + const struct inode *inode = data->header->inode; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->offset = data->args.offset; + __entry->count = data->args.count; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "offset=%lld count=%zu", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + (long long)__entry->offset, + __entry->count + ) +); +#define DEFINE_NFS4_READ_EVENT(name) \ + DEFINE_EVENT(nfs4_read_event, name, \ + TP_PROTO( \ + const struct nfs_pgio_data *data, \ + int error \ + ), \ + TP_ARGS(data, error)) +DEFINE_NFS4_READ_EVENT(nfs4_read); +#ifdef CONFIG_NFS_V4_1 +DEFINE_NFS4_READ_EVENT(nfs4_pnfs_read); +#endif /* CONFIG_NFS_V4_1 */ + +DECLARE_EVENT_CLASS(nfs4_write_event, + TP_PROTO( + const struct nfs_pgio_data *data, + int error + ), + + TP_ARGS(data, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(loff_t, offset) + __field(size_t, count) + __field(int, error) + ), + + TP_fast_assign( + const struct inode *inode = data->header->inode; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->offset = data->args.offset; + __entry->count = data->args.count; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "offset=%lld count=%zu", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + (long long)__entry->offset, + __entry->count + ) +); + +#define DEFINE_NFS4_WRITE_EVENT(name) \ + DEFINE_EVENT(nfs4_write_event, name, \ + TP_PROTO( \ + const struct nfs_pgio_data *data, \ + int error \ + ), \ + TP_ARGS(data, error)) +DEFINE_NFS4_WRITE_EVENT(nfs4_write); +#ifdef CONFIG_NFS_V4_1 +DEFINE_NFS4_WRITE_EVENT(nfs4_pnfs_write); +#endif /* CONFIG_NFS_V4_1 */ + +DECLARE_EVENT_CLASS(nfs4_commit_event, + TP_PROTO( + const struct nfs_commit_data *data, + int error + ), + + TP_ARGS(data, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(loff_t, offset) + __field(size_t, count) + __field(int, error) + ), + + TP_fast_assign( + const struct inode *inode = data->inode; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->offset = data->args.offset; + __entry->count = data->args.count; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "offset=%lld count=%zu", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + (long long)__entry->offset, + __entry->count + ) +); +#define DEFINE_NFS4_COMMIT_EVENT(name) \ + DEFINE_EVENT(nfs4_commit_event, name, \ + TP_PROTO( \ + const struct nfs_commit_data *data, \ + int error \ + ), \ + TP_ARGS(data, error)) +DEFINE_NFS4_COMMIT_EVENT(nfs4_commit); +#ifdef CONFIG_NFS_V4_1 +DEFINE_NFS4_COMMIT_EVENT(nfs4_pnfs_commit_ds); + +#define show_pnfs_iomode(iomode) \ + __print_symbolic(iomode, \ + { IOMODE_READ, "READ" }, \ + { IOMODE_RW, "RW" }, \ + { IOMODE_ANY, "ANY" }) + +TRACE_EVENT(nfs4_layoutget, + TP_PROTO( + const struct nfs_open_context *ctx, + const struct pnfs_layout_range *args, + const struct pnfs_layout_range *res, + int error + ), + + TP_ARGS(ctx, args, res, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(u32, iomode) + __field(u64, offset) + __field(u64, count) + __field(int, error) + ), + + TP_fast_assign( + const struct inode *inode = ctx->dentry->d_inode; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode)); + __entry->iomode = args->iomode; + __entry->offset = args->offset; + __entry->count = args->length; + __entry->error = error; + ), + + TP_printk( + "error=%d (%s) fileid=%02x:%02x:%llu fhandle=0x%08x " + "iomode=%s offset=%llu count=%llu", + __entry->error, + show_nfsv4_errors(__entry->error), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + show_pnfs_iomode(__entry->iomode), + (unsigned long long)__entry->offset, + (unsigned long long)__entry->count + ) +); + +DEFINE_NFS4_INODE_EVENT(nfs4_layoutcommit); +DEFINE_NFS4_INODE_EVENT(nfs4_layoutreturn); + +#endif /* CONFIG_NFS_V4_1 */ + +#endif /* _TRACE_NFS4_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#define TRACE_INCLUDE_FILE nfs4trace +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index f313c4cce7e..939ae606cfa 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -44,15 +44,21 @@ #include <linux/pagemap.h> #include <linux/proc_fs.h> #include <linux/kdev_t.h> +#include <linux/module.h> +#include <linux/utsname.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/msg_prot.h> +#include <linux/sunrpc/gss_api.h> #include <linux/nfs.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> #include <linux/nfs_idmap.h> + #include "nfs4_fs.h" #include "internal.h" +#include "nfs4session.h" #include "pnfs.h" +#include "netns.h" #define NFSDBG_FACILITY NFSDBG_XDR @@ -71,8 +77,8 @@ static int nfs4_stat_to_errno(int); /* lock,open owner id: * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2) */ -#define open_owner_id_maxsz (1 + 4) -#define lock_owner_id_maxsz (1 + 4) +#define open_owner_id_maxsz (1 + 2 + 1 + 1 + 2) +#define lock_owner_id_maxsz (1 + 1 + 4) #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) @@ -90,15 +96,25 @@ static int nfs4_stat_to_errno(int); #define encode_getfh_maxsz (op_encode_hdr_maxsz) #define decode_getfh_maxsz (op_decode_hdr_maxsz + 1 + \ ((3+NFS4_FHSIZE) >> 2)) -#define nfs4_fattr_bitmap_maxsz 3 +#define nfs4_fattr_bitmap_maxsz 4 #define encode_getattr_maxsz (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz) #define nfs4_name_maxsz (1 + ((3 + NFS4_MAXNAMLEN) >> 2)) #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2)) #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */ +#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN)) +#else +#define nfs4_label_maxsz 0 +#endif +/* We support only one layout type per file system */ +#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8) /* This is based on getfattr, which uses the most attributes: */ #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \ - 3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz)) + 3 + 3 + 3 + nfs4_owner_maxsz + \ + nfs4_group_maxsz + nfs4_label_maxsz + \ + decode_mdsthreshold_maxsz)) #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \ nfs4_fattr_value_maxsz) #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz) @@ -106,13 +122,18 @@ static int nfs4_stat_to_errno(int); 1 + 2 + 1 + \ nfs4_owner_maxsz + \ nfs4_group_maxsz + \ + nfs4_label_maxsz + \ 4 + 4) #define encode_savefh_maxsz (op_encode_hdr_maxsz) #define decode_savefh_maxsz (op_decode_hdr_maxsz) #define encode_restorefh_maxsz (op_encode_hdr_maxsz) #define decode_restorefh_maxsz (op_decode_hdr_maxsz) #define encode_fsinfo_maxsz (encode_getattr_maxsz) -#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11) +/* The 5 accounts for the PNFS attributes, and assumes that at most three + * layout types will be returned. + */ +#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + \ + nfs4_fattr_bitmap_maxsz + 4 + 8 + 5) #define encode_renew_maxsz (op_encode_hdr_maxsz + 3) #define decode_renew_maxsz (op_decode_hdr_maxsz) #define encode_setclientid_maxsz \ @@ -179,7 +200,8 @@ static int nfs4_stat_to_errno(int); encode_stateid_maxsz + 3) #define decode_read_maxsz (op_decode_hdr_maxsz + 2) #define encode_readdir_maxsz (op_encode_hdr_maxsz + \ - 2 + encode_verifier_maxsz + 5) + 2 + encode_verifier_maxsz + 5 + \ + nfs4_label_maxsz) #define decode_readdir_maxsz (op_decode_hdr_maxsz + \ decode_verifier_maxsz) #define encode_readlink_maxsz (op_encode_hdr_maxsz) @@ -253,9 +275,13 @@ static int nfs4_stat_to_errno(int); (encode_getattr_maxsz) #define decode_fs_locations_maxsz \ (0) +#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz) +#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4)) #if defined(CONFIG_NFS_V4_1) #define NFS4_MAX_MACHINE_NAME_LEN (64) +#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \ + sizeof(utsname()->version) + sizeof(utsname()->machine) + 8) #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \ encode_verifier_maxsz + \ @@ -263,21 +289,34 @@ static int nfs4_stat_to_errno(int); XDR_QUADLEN(NFS4_EXCHANGE_ID_LEN) + \ 1 /* flags */ + \ 1 /* spa_how */ + \ - 0 /* SP4_NONE (for now) */ + \ - 1 /* zero implemetation id array */) + /* max is SP4_MACH_CRED (for now) */ + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 /* implementation id array of size 1 */ + \ + 1 /* nii_domain */ + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 1 /* nii_name */ + \ + XDR_QUADLEN(IMPL_NAME_LIMIT) + \ + 3 /* nii_date */) #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \ 2 /* eir_clientid */ + \ 1 /* eir_sequenceid */ + \ 1 /* eir_flags */ + \ 1 /* spr_how */ + \ - 0 /* SP4_NONE (for now) */ + \ + /* max is SP4_MACH_CRED (for now) */ + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ + 1 + NFS4_OP_MAP_NUM_WORDS + \ 2 /* eir_server_owner.so_minor_id */ + \ /* eir_server_owner.so_major_id<> */ \ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ /* eir_server_scope<> */ \ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \ 1 /* eir_server_impl_id array length */ + \ - 0 /* ignored eir_server_impl_id contents */) + 1 /* nii_domain */ + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 1 /* nii_name */ + \ + XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + 3 /* nii_date */) #define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */) #define decode_channel_attrs_maxsz (6 + \ 1 /* ca_rdma_ird.len */ + \ @@ -303,14 +342,37 @@ static int nfs4_stat_to_errno(int); 1 /* csr_flags */ + \ decode_channel_attrs_maxsz + \ decode_channel_attrs_maxsz) +#define encode_bind_conn_to_session_maxsz (op_encode_hdr_maxsz + \ + /* bctsa_sessid */ \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ + 1 /* bctsa_dir */ + \ + 1 /* bctsa_use_conn_in_rdma_mode */) +#define decode_bind_conn_to_session_maxsz (op_decode_hdr_maxsz + \ + /* bctsr_sessid */ \ + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ + 1 /* bctsr_dir */ + \ + 1 /* bctsr_use_conn_in_rdma_mode */) #define encode_destroy_session_maxsz (op_encode_hdr_maxsz + 4) #define decode_destroy_session_maxsz (op_decode_hdr_maxsz) +#define encode_destroy_clientid_maxsz (op_encode_hdr_maxsz + 2) +#define decode_destroy_clientid_maxsz (op_decode_hdr_maxsz) #define encode_sequence_maxsz (op_encode_hdr_maxsz + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 4) #define decode_sequence_maxsz (op_decode_hdr_maxsz + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) #define encode_reclaim_complete_maxsz (op_encode_hdr_maxsz + 4) #define decode_reclaim_complete_maxsz (op_decode_hdr_maxsz + 4) +#define encode_getdevicelist_maxsz (op_encode_hdr_maxsz + 4 + \ + encode_verifier_maxsz) +#define decode_getdevicelist_maxsz (op_decode_hdr_maxsz + \ + 2 /* nfs_cookie4 gdlr_cookie */ + \ + decode_verifier_maxsz \ + /* verifier4 gdlr_verifier */ + \ + 1 /* gdlr_deviceid_list count */ + \ + XDR_QUADLEN(NFS4_PNFS_GETDEVLIST_MAXNUM * \ + NFS4_DEVICEID4_SIZE) \ + /* gdlr_deviceid_list */ + \ + 1 /* bool gdlr_eof */) #define encode_getdeviceinfo_maxsz (op_encode_hdr_maxsz + 4 + \ XDR_QUADLEN(NFS4_DEVICEID4_SIZE)) #define decode_getdeviceinfo_maxsz (op_decode_hdr_maxsz + \ @@ -324,6 +386,30 @@ static int nfs4_stat_to_errno(int); #define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \ decode_stateid_maxsz + \ XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE)) +#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \ + 2 /* offset */ + \ + 2 /* length */ + \ + 1 /* reclaim */ + \ + encode_stateid_maxsz + \ + 1 /* new offset (true) */ + \ + 2 /* last byte written */ + \ + 1 /* nt_timechanged (false) */ + \ + 1 /* layoutupdate4 layout type */ + \ + 1 /* NULL filelayout layoutupdate4 payload */) +#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3) +#define encode_layoutreturn_maxsz (8 + op_encode_hdr_maxsz + \ + encode_stateid_maxsz + \ + 1 /* FIXME: opaque lrf_body always empty at the moment */) +#define decode_layoutreturn_maxsz (op_decode_hdr_maxsz + \ + 1 + decode_stateid_maxsz) +#define encode_secinfo_no_name_maxsz (op_encode_hdr_maxsz + 1) +#define decode_secinfo_no_name_maxsz decode_secinfo_maxsz +#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 2 + \ + XDR_QUADLEN(NFS4_STATEID_SIZE)) +#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 2 + 1) +#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \ + XDR_QUADLEN(NFS4_STATEID_SIZE)) +#define decode_free_stateid_maxsz (op_decode_hdr_maxsz) #else /* CONFIG_NFS_V4_1 */ #define encode_sequence_maxsz 0 #define decode_sequence_maxsz 0 @@ -368,30 +454,24 @@ static int nfs4_stat_to_errno(int); #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ - encode_commit_maxsz + \ - encode_getattr_maxsz) + encode_commit_maxsz) #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ - decode_commit_maxsz + \ - decode_getattr_maxsz) + decode_commit_maxsz) #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ - encode_savefh_maxsz + \ encode_open_maxsz + \ + encode_access_maxsz + \ encode_getfh_maxsz + \ - encode_getattr_maxsz + \ - encode_restorefh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_open_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ - decode_savefh_maxsz + \ decode_open_maxsz + \ + decode_access_maxsz + \ decode_getfh_maxsz + \ - decode_getattr_maxsz + \ - decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_open_confirm_sz \ (compound_encode_hdr_maxsz + \ @@ -405,11 +485,13 @@ static int nfs4_stat_to_errno(int); encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_open_maxsz + \ + encode_access_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_open_noattr_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_open_maxsz + \ + decode_access_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_open_downgrade_sz \ (compound_encode_hdr_maxsz + \ @@ -461,14 +543,10 @@ static int nfs4_stat_to_errno(int); decode_setclientid_maxsz) #define NFS4_enc_setclientid_confirm_sz \ (compound_encode_hdr_maxsz + \ - encode_setclientid_confirm_maxsz + \ - encode_putrootfh_maxsz + \ - encode_fsinfo_maxsz) + encode_setclientid_confirm_maxsz) #define NFS4_dec_setclientid_confirm_sz \ (compound_decode_hdr_maxsz + \ - decode_setclientid_confirm_maxsz + \ - decode_putrootfh_maxsz + \ - decode_fsinfo_maxsz) + decode_setclientid_confirm_maxsz) #define NFS4_enc_lock_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ @@ -512,11 +590,13 @@ static int nfs4_stat_to_errno(int); #define NFS4_enc_getattr_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ - encode_getattr_maxsz) + encode_getattr_maxsz + \ + encode_renew_maxsz) #define NFS4_dec_getattr_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ - decode_getattr_maxsz) + decode_getattr_maxsz + \ + decode_renew_maxsz) #define NFS4_enc_lookup_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ @@ -542,47 +622,37 @@ static int nfs4_stat_to_errno(int); #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ - encode_remove_maxsz + \ - encode_getattr_maxsz) + encode_remove_maxsz) #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ - decode_remove_maxsz + \ - decode_getattr_maxsz) + decode_remove_maxsz) #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ - encode_rename_maxsz + \ - encode_getattr_maxsz + \ - encode_restorefh_maxsz + \ - encode_getattr_maxsz) + encode_rename_maxsz) #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ - decode_rename_maxsz + \ - decode_getattr_maxsz + \ - decode_restorefh_maxsz + \ - decode_getattr_maxsz) + decode_rename_maxsz) #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ encode_link_maxsz + \ - decode_getattr_maxsz + \ encode_restorefh_maxsz + \ - decode_getattr_maxsz) + encode_getattr_maxsz) #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ decode_link_maxsz + \ - decode_getattr_maxsz + \ decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \ @@ -600,20 +670,14 @@ static int nfs4_stat_to_errno(int); #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ encode_putfh_maxsz + \ - encode_savefh_maxsz + \ encode_create_maxsz + \ encode_getfh_maxsz + \ - encode_getattr_maxsz + \ - encode_restorefh_maxsz + \ encode_getattr_maxsz) #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ - decode_savefh_maxsz + \ decode_create_maxsz + \ decode_getfh_maxsz + \ - decode_getattr_maxsz + \ - decode_restorefh_maxsz + \ decode_getattr_maxsz) #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz + \ @@ -669,14 +733,42 @@ static int nfs4_stat_to_errno(int); encode_sequence_maxsz + \ encode_putfh_maxsz + \ encode_lookup_maxsz + \ - encode_fs_locations_maxsz) + encode_fs_locations_maxsz + \ + encode_renew_maxsz) #define NFS4_dec_fs_locations_sz \ (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_lookup_maxsz + \ - decode_fs_locations_maxsz) + decode_fs_locations_maxsz + \ + decode_renew_maxsz) +#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_secinfo_maxsz) +#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_secinfo_maxsz) +#define NFS4_enc_fsid_present_sz \ + (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_getfh_maxsz + \ + encode_renew_maxsz) +#define NFS4_dec_fsid_present_sz \ + (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_getfh_maxsz + \ + decode_renew_maxsz) #if defined(CONFIG_NFS_V4_1) +#define NFS4_enc_bind_conn_to_session_sz \ + (compound_encode_hdr_maxsz + \ + encode_bind_conn_to_session_maxsz) +#define NFS4_dec_bind_conn_to_session_sz \ + (compound_decode_hdr_maxsz + \ + decode_bind_conn_to_session_maxsz) #define NFS4_enc_exchange_id_sz \ (compound_encode_hdr_maxsz + \ encode_exchange_id_maxsz) @@ -693,6 +785,10 @@ static int nfs4_stat_to_errno(int); encode_destroy_session_maxsz) #define NFS4_dec_destroy_session_sz (compound_decode_hdr_maxsz + \ decode_destroy_session_maxsz) +#define NFS4_enc_destroy_clientid_sz (compound_encode_hdr_maxsz + \ + encode_destroy_clientid_maxsz) +#define NFS4_dec_destroy_clientid_sz (compound_decode_hdr_maxsz + \ + decode_destroy_clientid_maxsz) #define NFS4_enc_sequence_sz \ (compound_decode_hdr_maxsz + \ encode_sequence_maxsz) @@ -713,6 +809,14 @@ static int nfs4_stat_to_errno(int); #define NFS4_dec_reclaim_complete_sz (compound_decode_hdr_maxsz + \ decode_sequence_maxsz + \ decode_reclaim_complete_maxsz) +#define NFS4_enc_getdevicelist_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_getdevicelist_maxsz) +#define NFS4_dec_getdevicelist_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_getdevicelist_maxsz) #define NFS4_enc_getdeviceinfo_sz (compound_encode_hdr_maxsz + \ encode_sequence_maxsz +\ encode_getdeviceinfo_maxsz) @@ -727,6 +831,44 @@ static int nfs4_stat_to_errno(int); decode_sequence_maxsz + \ decode_putfh_maxsz + \ decode_layoutget_maxsz) +#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz +\ + encode_putfh_maxsz + \ + encode_layoutcommit_maxsz + \ + encode_getattr_maxsz) +#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutcommit_maxsz + \ + decode_getattr_maxsz) +#define NFS4_enc_layoutreturn_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putfh_maxsz + \ + encode_layoutreturn_maxsz) +#define NFS4_dec_layoutreturn_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putfh_maxsz + \ + decode_layoutreturn_maxsz) +#define NFS4_enc_secinfo_no_name_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_putrootfh_maxsz +\ + encode_secinfo_no_name_maxsz) +#define NFS4_dec_secinfo_no_name_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_putrootfh_maxsz + \ + decode_secinfo_no_name_maxsz) +#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_test_stateid_maxsz) +#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_test_stateid_maxsz) +#define NFS4_enc_free_stateid_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_free_stateid_maxsz) +#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_free_stateid_maxsz) const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH + compound_encode_hdr_maxsz + @@ -740,6 +882,12 @@ const u32 nfs41_maxread_overhead = ((RPC_MAX_HEADER_WITH_AUTH + decode_sequence_maxsz + decode_putfh_maxsz) * XDR_UNIT); + +const u32 nfs41_maxgetdevinfo_overhead = ((RPC_MAX_REPHEADER_WITH_AUTH + + compound_decode_hdr_maxsz + + decode_sequence_maxsz) * + XDR_UNIT); +EXPORT_SYMBOL_GPL(nfs41_maxgetdevinfo_overhead); #endif /* CONFIG_NFS_V4_1 */ static const umode_t nfs_type2fmt[] = { @@ -772,15 +920,44 @@ static __be32 *reserve_space(struct xdr_stream *xdr, size_t nbytes) return p; } +static void encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, len); + xdr_encode_opaque_fixed(p, buf, len); +} + static void encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) { __be32 *p; - p = xdr_reserve_space(xdr, 4 + len); - BUG_ON(p == NULL); + p = reserve_space(xdr, 4 + len); xdr_encode_opaque(p, str, len); } +static void encode_uint32(struct xdr_stream *xdr, u32 n) +{ + __be32 *p; + + p = reserve_space(xdr, 4); + *p = cpu_to_be32(n); +} + +static void encode_uint64(struct xdr_stream *xdr, u64 n) +{ + __be32 *p; + + p = reserve_space(xdr, 8); + xdr_encode_hyper(p, n); +} + +static void encode_nfs4_seqid(struct xdr_stream *xdr, + const struct nfs_seqid *seqid) +{ + encode_uint32(xdr, seqid->sequence->counter); +} + static void encode_compound_hdr(struct xdr_stream *xdr, struct rpc_rqst *req, struct compound_hdr *hdr) @@ -793,194 +970,189 @@ static void encode_compound_hdr(struct xdr_stream *xdr, * but this is not required as a MUST for the server to do so. */ hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen; - dprintk("encode_compound: tag=%.*s\n", (int)hdr->taglen, hdr->tag); - BUG_ON(hdr->taglen > NFS4_MAXTAGLEN); - p = reserve_space(xdr, 4 + hdr->taglen + 8); - p = xdr_encode_opaque(p, hdr->tag, hdr->taglen); + WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN); + encode_string(xdr, hdr->taglen, hdr->tag); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(hdr->minorversion); hdr->nops_p = p; *p = cpu_to_be32(hdr->nops); } +static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op, + uint32_t replen, + struct compound_hdr *hdr) +{ + encode_uint32(xdr, op); + hdr->nops++; + hdr->replen += replen; +} + static void encode_nops(struct compound_hdr *hdr) { - BUG_ON(hdr->nops > NFS4_MAX_OPS); + WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS); *hdr->nops_p = htonl(hdr->nops); } -static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf) +static void encode_nfs4_stateid(struct xdr_stream *xdr, const nfs4_stateid *stateid) { - __be32 *p; + encode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE); +} - p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); - BUG_ON(p == NULL); - xdr_encode_opaque_fixed(p, verf->data, NFS4_VERIFIER_SIZE); +static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *verf) +{ + encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE); } -static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server) +static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, + const struct nfs4_label *label, + const struct nfs_server *server) { char owner_name[IDMAP_NAMESZ]; char owner_group[IDMAP_NAMESZ]; int owner_namelen = 0; int owner_grouplen = 0; __be32 *p; - __be32 *q; - int len; - uint32_t bmval0 = 0; - uint32_t bmval1 = 0; + unsigned i; + uint32_t len = 0; + uint32_t bmval_len; + uint32_t bmval[3] = { 0 }; /* * We reserve enough space to write the entire attribute buffer at once. * In the worst-case, this would be - * 12(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime) - * = 36 bytes, plus any contribution from variable-length fields + * 16(bitmap) + 4(attrlen) + 8(size) + 4(mode) + 4(atime) + 4(mtime) + * = 40 bytes, plus any contribution from variable-length fields * such as owner/group. */ - len = 16; - - /* Sigh */ - if (iap->ia_valid & ATTR_SIZE) + if (iap->ia_valid & ATTR_SIZE) { + bmval[0] |= FATTR4_WORD0_SIZE; len += 8; - if (iap->ia_valid & ATTR_MODE) + } + if (iap->ia_valid & ATTR_MODE) { + bmval[1] |= FATTR4_WORD1_MODE; len += 4; + } if (iap->ia_valid & ATTR_UID) { - owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ); + owner_namelen = nfs_map_uid_to_name(server, iap->ia_uid, owner_name, IDMAP_NAMESZ); if (owner_namelen < 0) { dprintk("nfs: couldn't resolve uid %d to string\n", - iap->ia_uid); + from_kuid(&init_user_ns, iap->ia_uid)); /* XXX */ strcpy(owner_name, "nobody"); owner_namelen = sizeof("nobody") - 1; /* goto out; */ } + bmval[1] |= FATTR4_WORD1_OWNER; len += 4 + (XDR_QUADLEN(owner_namelen) << 2); } if (iap->ia_valid & ATTR_GID) { - owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ); + owner_grouplen = nfs_map_gid_to_group(server, iap->ia_gid, owner_group, IDMAP_NAMESZ); if (owner_grouplen < 0) { dprintk("nfs: couldn't resolve gid %d to string\n", - iap->ia_gid); + from_kgid(&init_user_ns, iap->ia_gid)); strcpy(owner_group, "nobody"); owner_grouplen = sizeof("nobody") - 1; /* goto out; */ } + bmval[1] |= FATTR4_WORD1_OWNER_GROUP; len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); } - if (iap->ia_valid & ATTR_ATIME_SET) + if (iap->ia_valid & ATTR_ATIME_SET) { + bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET; len += 16; - else if (iap->ia_valid & ATTR_ATIME) + } else if (iap->ia_valid & ATTR_ATIME) { + bmval[1] |= FATTR4_WORD1_TIME_ACCESS_SET; len += 4; - if (iap->ia_valid & ATTR_MTIME_SET) + } + if (iap->ia_valid & ATTR_MTIME_SET) { + bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET; len += 16; - else if (iap->ia_valid & ATTR_MTIME) + } else if (iap->ia_valid & ATTR_MTIME) { + bmval[1] |= FATTR4_WORD1_TIME_MODIFY_SET; len += 4; - p = reserve_space(xdr, len); + } + if (label) { + len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2); + bmval[2] |= FATTR4_WORD2_SECURITY_LABEL; + } - /* - * We write the bitmap length now, but leave the bitmap and the attribute - * buffer length to be backfilled at the end of this routine. - */ - *p++ = cpu_to_be32(2); - q = p; - p += 3; + if (bmval[2] != 0) + bmval_len = 3; + else if (bmval[1] != 0) + bmval_len = 2; + else + bmval_len = 1; - if (iap->ia_valid & ATTR_SIZE) { - bmval0 |= FATTR4_WORD0_SIZE; + p = reserve_space(xdr, 4 + (bmval_len << 2) + 4 + len); + + *p++ = cpu_to_be32(bmval_len); + for (i = 0; i < bmval_len; i++) + *p++ = cpu_to_be32(bmval[i]); + *p++ = cpu_to_be32(len); + + if (bmval[0] & FATTR4_WORD0_SIZE) p = xdr_encode_hyper(p, iap->ia_size); - } - if (iap->ia_valid & ATTR_MODE) { - bmval1 |= FATTR4_WORD1_MODE; + if (bmval[1] & FATTR4_WORD1_MODE) *p++ = cpu_to_be32(iap->ia_mode & S_IALLUGO); - } - if (iap->ia_valid & ATTR_UID) { - bmval1 |= FATTR4_WORD1_OWNER; + if (bmval[1] & FATTR4_WORD1_OWNER) p = xdr_encode_opaque(p, owner_name, owner_namelen); - } - if (iap->ia_valid & ATTR_GID) { - bmval1 |= FATTR4_WORD1_OWNER_GROUP; + if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) p = xdr_encode_opaque(p, owner_group, owner_grouplen); + if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { + if (iap->ia_valid & ATTR_ATIME_SET) { + *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); + p = xdr_encode_hyper(p, (s64)iap->ia_atime.tv_sec); + *p++ = cpu_to_be32(iap->ia_atime.tv_nsec); + } else + *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); } - if (iap->ia_valid & ATTR_ATIME_SET) { - bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; - *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); - *p++ = cpu_to_be32(0); - *p++ = cpu_to_be32(iap->ia_atime.tv_sec); - *p++ = cpu_to_be32(iap->ia_atime.tv_nsec); - } - else if (iap->ia_valid & ATTR_ATIME) { - bmval1 |= FATTR4_WORD1_TIME_ACCESS_SET; - *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); - } - if (iap->ia_valid & ATTR_MTIME_SET) { - bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; - *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); - *p++ = cpu_to_be32(0); - *p++ = cpu_to_be32(iap->ia_mtime.tv_sec); - *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); - } - else if (iap->ia_valid & ATTR_MTIME) { - bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; - *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); + if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { + if (iap->ia_valid & ATTR_MTIME_SET) { + *p++ = cpu_to_be32(NFS4_SET_TO_CLIENT_TIME); + p = xdr_encode_hyper(p, (s64)iap->ia_mtime.tv_sec); + *p++ = cpu_to_be32(iap->ia_mtime.tv_nsec); + } else + *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); } - - /* - * Now we backfill the bitmap and the attribute buffer length. - */ - if (len != ((char *)p - (char *)q) + 4) { - printk(KERN_ERR "nfs: Attr length error, %u != %Zu\n", - len, ((char *)p - (char *)q) + 4); - BUG(); + if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { + *p++ = cpu_to_be32(label->lfs); + *p++ = cpu_to_be32(label->pi); + *p++ = cpu_to_be32(label->len); + p = xdr_encode_opaque_fixed(p, label->label, label->len); } - len = (char *)p - (char *)q - 12; - *q++ = htonl(bmval0); - *q++ = htonl(bmval1); - *q = htonl(len); /* out: */ } static void encode_access(struct xdr_stream *xdr, u32 access, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 8); - *p++ = cpu_to_be32(OP_ACCESS); - *p = cpu_to_be32(access); - hdr->nops++; - hdr->replen += decode_access_maxsz; + encode_op_hdr(xdr, OP_ACCESS, decode_access_maxsz, hdr); + encode_uint32(xdr, access); } static void encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 8+NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(OP_CLOSE); - *p++ = cpu_to_be32(arg->seqid->sequence->counter); - xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); - hdr->nops++; - hdr->replen += decode_close_maxsz; + encode_op_hdr(xdr, OP_CLOSE, decode_close_maxsz, hdr); + encode_nfs4_seqid(xdr, arg->seqid); + encode_nfs4_stateid(xdr, arg->stateid); } -static void encode_commit(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) +static void encode_commit(struct xdr_stream *xdr, const struct nfs_commitargs *args, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 16); - *p++ = cpu_to_be32(OP_COMMIT); + encode_op_hdr(xdr, OP_COMMIT, decode_commit_maxsz, hdr); + p = reserve_space(xdr, 12); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); - hdr->nops++; - hdr->replen += decode_commit_maxsz; } static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *create, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 8); - *p++ = cpu_to_be32(OP_CREATE); - *p = cpu_to_be32(create->ftype); + encode_op_hdr(xdr, OP_CREATE, decode_create_maxsz, hdr); + encode_uint32(xdr, create->ftype); switch (create->ftype) { case NF4LNK: @@ -1000,47 +1172,82 @@ static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg * } encode_string(xdr, create->name->len, create->name->name); - hdr->nops++; - hdr->replen += decode_create_maxsz; - - encode_attrs(xdr, create->attrs, create->server); + encode_attrs(xdr, create->attrs, create->label, create->server); } static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 12); - *p++ = cpu_to_be32(OP_GETATTR); + encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr); + p = reserve_space(xdr, 8); *p++ = cpu_to_be32(1); *p = cpu_to_be32(bitmap); - hdr->nops++; - hdr->replen += decode_getattr_maxsz; } static void encode_getattr_two(struct xdr_stream *xdr, uint32_t bm0, uint32_t bm1, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 16); - *p++ = cpu_to_be32(OP_GETATTR); + encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr); + p = reserve_space(xdr, 12); *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(bm0); *p = cpu_to_be32(bm1); - hdr->nops++; - hdr->replen += decode_getattr_maxsz; +} + +static void +encode_getattr_three(struct xdr_stream *xdr, + uint32_t bm0, uint32_t bm1, uint32_t bm2, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_GETATTR, decode_getattr_maxsz, hdr); + if (bm2) { + p = reserve_space(xdr, 16); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(bm0); + *p++ = cpu_to_be32(bm1); + *p = cpu_to_be32(bm2); + } else if (bm1) { + p = reserve_space(xdr, 12); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(bm0); + *p = cpu_to_be32(bm1); + } else { + p = reserve_space(xdr, 8); + *p++ = cpu_to_be32(1); + *p = cpu_to_be32(bm0); + } } static void encode_getfattr(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) { - encode_getattr_two(xdr, bitmask[0] & nfs4_fattr_bitmap[0], - bitmask[1] & nfs4_fattr_bitmap[1], hdr); + encode_getattr_three(xdr, bitmask[0] & nfs4_fattr_bitmap[0], + bitmask[1] & nfs4_fattr_bitmap[1], + bitmask[2] & nfs4_fattr_bitmap[2], + hdr); +} + +static void encode_getfattr_open(struct xdr_stream *xdr, const u32 *bitmask, + const u32 *open_bitmap, + struct compound_hdr *hdr) +{ + encode_getattr_three(xdr, + bitmask[0] & open_bitmap[0], + bitmask[1] & open_bitmap[1], + bitmask[2] & open_bitmap[2], + hdr); } static void encode_fsinfo(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) { - encode_getattr_two(xdr, bitmask[0] & nfs4_fsinfo_bitmap[0], - bitmask[1] & nfs4_fsinfo_bitmap[1], hdr); + encode_getattr_three(xdr, + bitmask[0] & nfs4_fsinfo_bitmap[0], + bitmask[1] & nfs4_fsinfo_bitmap[1], + bitmask[2] & nfs4_fsinfo_bitmap[2], + hdr); } static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, struct compound_hdr *hdr) @@ -1051,28 +1258,18 @@ static void encode_fs_locations(struct xdr_stream *xdr, const u32* bitmask, stru static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_GETFH); - hdr->nops++; - hdr->replen += decode_getfh_maxsz; + encode_op_hdr(xdr, OP_GETFH, decode_getfh_maxsz, hdr); } static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 8 + name->len); - *p++ = cpu_to_be32(OP_LINK); - xdr_encode_opaque(p, name->name, name->len); - hdr->nops++; - hdr->replen += decode_link_maxsz; + encode_op_hdr(xdr, OP_LINK, decode_link_maxsz, hdr); + encode_string(xdr, name->len, name->name); } static inline int nfs4_lock_type(struct file_lock *fl, int block) { - if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK) + if (fl->fl_type == F_RDLCK) return block ? NFS4_READW_LT : NFS4_READ_LT; return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT; } @@ -1088,10 +1285,11 @@ static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lo { __be32 *p; - p = reserve_space(xdr, 28); + p = reserve_space(xdr, 32); p = xdr_encode_hyper(p, lowner->clientid); - *p++ = cpu_to_be32(16); + *p++ = cpu_to_be32(20); p = xdr_encode_opaque_fixed(p, "lock id:", 8); + *p++ = cpu_to_be32(lowner->s_dev); xdr_encode_hyper(p, lowner->id); } @@ -1103,79 +1301,60 @@ static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args { __be32 *p; - p = reserve_space(xdr, 32); - *p++ = cpu_to_be32(OP_LOCK); + encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr); + p = reserve_space(xdr, 28); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block)); *p++ = cpu_to_be32(args->reclaim); p = xdr_encode_hyper(p, args->fl->fl_start); p = xdr_encode_hyper(p, nfs4_lock_length(args->fl)); *p = cpu_to_be32(args->new_lock_owner); if (args->new_lock_owner){ - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); - *p++ = cpu_to_be32(args->open_seqid->sequence->counter); - p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(args->lock_seqid->sequence->counter); + encode_nfs4_seqid(xdr, args->open_seqid); + encode_nfs4_stateid(xdr, args->open_stateid); + encode_nfs4_seqid(xdr, args->lock_seqid); encode_lockowner(xdr, &args->lock_owner); } else { - p = reserve_space(xdr, NFS4_STATEID_SIZE+4); - p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE); - *p = cpu_to_be32(args->lock_seqid->sequence->counter); + encode_nfs4_stateid(xdr, args->lock_stateid); + encode_nfs4_seqid(xdr, args->lock_seqid); } - hdr->nops++; - hdr->replen += decode_lock_maxsz; } static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 24); - *p++ = cpu_to_be32(OP_LOCKT); + encode_op_hdr(xdr, OP_LOCKT, decode_lockt_maxsz, hdr); + p = reserve_space(xdr, 20); *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); p = xdr_encode_hyper(p, args->fl->fl_start); p = xdr_encode_hyper(p, nfs4_lock_length(args->fl)); encode_lockowner(xdr, &args->lock_owner); - hdr->nops++; - hdr->replen += decode_lockt_maxsz; } static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 12+NFS4_STATEID_SIZE+16); - *p++ = cpu_to_be32(OP_LOCKU); - *p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0)); - *p++ = cpu_to_be32(args->seqid->sequence->counter); - p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE); + encode_op_hdr(xdr, OP_LOCKU, decode_locku_maxsz, hdr); + encode_uint32(xdr, nfs4_lock_type(args->fl, 0)); + encode_nfs4_seqid(xdr, args->seqid); + encode_nfs4_stateid(xdr, args->stateid); + p = reserve_space(xdr, 16); p = xdr_encode_hyper(p, args->fl->fl_start); xdr_encode_hyper(p, nfs4_lock_length(args->fl)); - hdr->nops++; - hdr->replen += decode_locku_maxsz; } static void encode_release_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lowner, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_RELEASE_LOCKOWNER); + encode_op_hdr(xdr, OP_RELEASE_LOCKOWNER, decode_release_lockowner_maxsz, hdr); encode_lockowner(xdr, lowner); - hdr->nops++; - hdr->replen += decode_release_lockowner_maxsz; } static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { - int len = name->len; - __be32 *p; - - p = reserve_space(xdr, 8 + len); - *p++ = cpu_to_be32(OP_LOOKUP); - xdr_encode_opaque(p, name->name, len); - hdr->nops++; - hdr->replen += decode_lookup_maxsz; + encode_op_hdr(xdr, OP_LOOKUP, decode_lookup_maxsz, hdr); + encode_string(xdr, name->len, name->name); } static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode) @@ -1206,46 +1385,41 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4, * owner 4 = 32 */ - p = reserve_space(xdr, 8); - *p++ = cpu_to_be32(OP_OPEN); - *p = cpu_to_be32(arg->seqid->sequence->counter); + encode_nfs4_seqid(xdr, arg->seqid); encode_share_access(xdr, arg->fmode); - p = reserve_space(xdr, 28); + p = reserve_space(xdr, 36); p = xdr_encode_hyper(p, arg->clientid); - *p++ = cpu_to_be32(16); + *p++ = cpu_to_be32(24); p = xdr_encode_opaque_fixed(p, "open id:", 8); - xdr_encode_hyper(p, arg->id); + *p++ = cpu_to_be32(arg->server->s_dev); + *p++ = cpu_to_be32(arg->id.uniquifier); + xdr_encode_hyper(p, arg->id.create_time); } static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg) { + struct iattr dummy; __be32 *p; - struct nfs_client *clp; p = reserve_space(xdr, 4); - switch(arg->open_flags & O_EXCL) { - case 0: + switch(arg->createmode) { + case NFS4_CREATE_UNCHECKED: *p = cpu_to_be32(NFS4_CREATE_UNCHECKED); - encode_attrs(xdr, arg->u.attrs, arg->server); + encode_attrs(xdr, arg->u.attrs, arg->label, arg->server); break; - default: - clp = arg->server->nfs_client; - if (clp->cl_mvops->minor_version > 0) { - if (nfs4_has_persistent_session(clp)) { - *p = cpu_to_be32(NFS4_CREATE_GUARDED); - encode_attrs(xdr, arg->u.attrs, arg->server); - } else { - struct iattr dummy; - - *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1); - encode_nfs4_verifier(xdr, &arg->u.verifier); - dummy.ia_valid = 0; - encode_attrs(xdr, &dummy, arg->server); - } - } else { - *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); - encode_nfs4_verifier(xdr, &arg->u.verifier); - } + case NFS4_CREATE_GUARDED: + *p = cpu_to_be32(NFS4_CREATE_GUARDED); + encode_attrs(xdr, arg->u.attrs, arg->label, arg->server); + break; + case NFS4_CREATE_EXCLUSIVE: + *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); + encode_nfs4_verifier(xdr, &arg->u.verifier); + break; + case NFS4_CREATE_EXCLUSIVE4_1: + *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1); + encode_nfs4_verifier(xdr, &arg->u.verifier); + dummy.ia_valid = 0; + encode_attrs(xdr, &dummy, arg->label, arg->server); } } @@ -1259,7 +1433,6 @@ static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *a *p = cpu_to_be32(NFS4_OPEN_NOCREATE); break; default: - BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL); *p = cpu_to_be32(NFS4_OPEN_CREATE); encode_createmode(xdr, arg); } @@ -1307,14 +1480,32 @@ static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struc { __be32 *p; - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR); - xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); + p = reserve_space(xdr, 4); + *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR); + encode_nfs4_stateid(xdr, stateid); encode_string(xdr, name->len, name->name); } +static inline void encode_claim_fh(struct xdr_stream *xdr) +{ + __be32 *p; + + p = reserve_space(xdr, 4); + *p = cpu_to_be32(NFS4_OPEN_CLAIM_FH); +} + +static inline void encode_claim_delegate_cur_fh(struct xdr_stream *xdr, const nfs4_stateid *stateid) +{ + __be32 *p; + + p = reserve_space(xdr, 4); + *p = cpu_to_be32(NFS4_OPEN_CLAIM_DELEG_CUR_FH); + encode_nfs4_stateid(xdr, stateid); +} + static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr) { + encode_op_hdr(xdr, OP_OPEN, decode_open_maxsz, hdr); encode_openhdr(xdr, arg); encode_opentype(xdr, arg); switch (arg->claim) { @@ -1327,240 +1518,172 @@ static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, case NFS4_OPEN_CLAIM_DELEGATE_CUR: encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation); break; + case NFS4_OPEN_CLAIM_FH: + encode_claim_fh(xdr); + break; + case NFS4_OPEN_CLAIM_DELEG_CUR_FH: + encode_claim_delegate_cur_fh(xdr, &arg->u.delegation); + break; default: BUG(); } - hdr->nops++; - hdr->replen += decode_open_maxsz; } static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); - *p++ = cpu_to_be32(OP_OPEN_CONFIRM); - p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); - *p = cpu_to_be32(arg->seqid->sequence->counter); - hdr->nops++; - hdr->replen += decode_open_confirm_maxsz; + encode_op_hdr(xdr, OP_OPEN_CONFIRM, decode_open_confirm_maxsz, hdr); + encode_nfs4_stateid(xdr, arg->stateid); + encode_nfs4_seqid(xdr, arg->seqid); } static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE+4); - *p++ = cpu_to_be32(OP_OPEN_DOWNGRADE); - p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE); - *p = cpu_to_be32(arg->seqid->sequence->counter); + encode_op_hdr(xdr, OP_OPEN_DOWNGRADE, decode_open_downgrade_maxsz, hdr); + encode_nfs4_stateid(xdr, arg->stateid); + encode_nfs4_seqid(xdr, arg->seqid); encode_share_access(xdr, arg->fmode); - hdr->nops++; - hdr->replen += decode_open_downgrade_maxsz; } static void encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr) { - int len = fh->size; - __be32 *p; - - p = reserve_space(xdr, 8 + len); - *p++ = cpu_to_be32(OP_PUTFH); - xdr_encode_opaque(p, fh->data, len); - hdr->nops++; - hdr->replen += decode_putfh_maxsz; + encode_op_hdr(xdr, OP_PUTFH, decode_putfh_maxsz, hdr); + encode_string(xdr, fh->size, fh->data); } static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_PUTROOTFH); - hdr->nops++; - hdr->replen += decode_putrootfh_maxsz; + encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr); } -static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx, const struct nfs_lock_context *l_ctx) +static void encode_read(struct xdr_stream *xdr, const struct nfs_pgio_args *args, + struct compound_hdr *hdr) { - nfs4_stateid stateid; __be32 *p; - p = reserve_space(xdr, NFS4_STATEID_SIZE); - if (ctx->state != NULL) { - nfs4_copy_stateid(&stateid, ctx->state, l_ctx->lockowner, l_ctx->pid); - xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE); - } else - xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); -} - -static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr) -{ - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_READ); - - encode_stateid(xdr, args->context, args->lock_context); + encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); p = reserve_space(xdr, 12); p = xdr_encode_hyper(p, args->offset); *p = cpu_to_be32(args->count); - hdr->nops++; - hdr->replen += decode_read_maxsz; } static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr) { - uint32_t attrs[2] = {0, 0}; + uint32_t attrs[3] = { + FATTR4_WORD0_RDATTR_ERROR, + FATTR4_WORD1_MOUNTED_ON_FILEID, + }; uint32_t dircount = readdir->count >> 1; - __be32 *p; + __be32 *p, verf[2]; + uint32_t attrlen = 0; + unsigned int i; if (readdir->plus) { attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE| - FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE; + FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE|FATTR4_WORD0_FILEID; attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER| FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV| FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS| FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; + attrs[2] |= FATTR4_WORD2_SECURITY_LABEL; dircount >>= 1; } - attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID; - attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; - /* Switch to mounted_on_fileid if the server supports it */ - if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) - attrs[0] &= ~FATTR4_WORD0_FILEID; - else - attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; + /* Use mounted_on_fileid only if the server supports it */ + if (!(readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) + attrs[0] |= FATTR4_WORD0_FILEID; + for (i = 0; i < ARRAY_SIZE(attrs); i++) { + attrs[i] &= readdir->bitmask[i]; + if (attrs[i] != 0) + attrlen = i+1; + } - p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20); - *p++ = cpu_to_be32(OP_READDIR); - p = xdr_encode_hyper(p, readdir->cookie); - p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE); + encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr); + encode_uint64(xdr, readdir->cookie); + encode_nfs4_verifier(xdr, &readdir->verifier); + p = reserve_space(xdr, 12 + (attrlen << 2)); *p++ = cpu_to_be32(dircount); *p++ = cpu_to_be32(readdir->count); - *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(attrlen); + for (i = 0; i < attrlen; i++) + *p++ = cpu_to_be32(attrs[i]); + memcpy(verf, readdir->verifier.data, sizeof(verf)); - *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]); - *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]); - hdr->nops++; - hdr->replen += decode_readdir_maxsz; - dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n", + dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n", __func__, (unsigned long long)readdir->cookie, - ((u32 *)readdir->verifier.data)[0], - ((u32 *)readdir->verifier.data)[1], + verf[0], verf[1], attrs[0] & readdir->bitmask[0], - attrs[1] & readdir->bitmask[1]); + attrs[1] & readdir->bitmask[1], + attrs[2] & readdir->bitmask[2]); } static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_READLINK); - hdr->nops++; - hdr->replen += decode_readlink_maxsz; + encode_op_hdr(xdr, OP_READLINK, decode_readlink_maxsz, hdr); } static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 8 + name->len); - *p++ = cpu_to_be32(OP_REMOVE); - xdr_encode_opaque(p, name->name, name->len); - hdr->nops++; - hdr->replen += decode_remove_maxsz; + encode_op_hdr(xdr, OP_REMOVE, decode_remove_maxsz, hdr); + encode_string(xdr, name->len, name->name); } static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_RENAME); + encode_op_hdr(xdr, OP_RENAME, decode_rename_maxsz, hdr); encode_string(xdr, oldname->len, oldname->name); encode_string(xdr, newname->len, newname->name); - hdr->nops++; - hdr->replen += decode_rename_maxsz; } -static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr) +static void encode_renew(struct xdr_stream *xdr, clientid4 clid, + struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 12); - *p++ = cpu_to_be32(OP_RENEW); - xdr_encode_hyper(p, client_stateid->cl_clientid); - hdr->nops++; - hdr->replen += decode_renew_maxsz; + encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr); + encode_uint64(xdr, clid); } static void encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_RESTOREFH); - hdr->nops++; - hdr->replen += decode_restorefh_maxsz; + encode_op_hdr(xdr, OP_RESTOREFH, decode_restorefh_maxsz, hdr); } -static int +static void encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(OP_SETATTR); - xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE); + encode_op_hdr(xdr, OP_SETATTR, decode_setacl_maxsz, hdr); + encode_nfs4_stateid(xdr, &zero_stateid); p = reserve_space(xdr, 2*4); *p++ = cpu_to_be32(1); *p = cpu_to_be32(FATTR4_WORD0_ACL); - if (arg->acl_len % 4) - return -EINVAL; p = reserve_space(xdr, 4); *p = cpu_to_be32(arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); - hdr->nops++; - hdr->replen += decode_setacl_maxsz; - return 0; } static void encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_SAVEFH); - hdr->nops++; - hdr->replen += decode_savefh_maxsz; + encode_op_hdr(xdr, OP_SAVEFH, decode_savefh_maxsz, hdr); } static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(OP_SETATTR); - xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE); - hdr->nops++; - hdr->replen += decode_setattr_maxsz; - encode_attrs(xdr, arg->iap, server); + encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr); + encode_nfs4_stateid(xdr, &arg->stateid); + encode_attrs(xdr, arg->iap, arg->label, server); } static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 4 + NFS4_VERIFIER_SIZE); - *p++ = cpu_to_be32(OP_SETCLIENTID); - xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE); + encode_op_hdr(xdr, OP_SETCLIENTID, decode_setclientid_maxsz, hdr); + encode_nfs4_verifier(xdr, setclientid->sc_verifier); encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name); p = reserve_space(xdr, 4); @@ -1569,30 +1692,23 @@ static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclie encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr); p = reserve_space(xdr, 4); *p = cpu_to_be32(setclientid->sc_cb_ident); - hdr->nops++; - hdr->replen += decode_setclientid_maxsz; } static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_setclientid_res *arg, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 12 + NFS4_VERIFIER_SIZE); - *p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM); - p = xdr_encode_hyper(p, arg->clientid); - xdr_encode_opaque_fixed(p, arg->confirm.data, NFS4_VERIFIER_SIZE); - hdr->nops++; - hdr->replen += decode_setclientid_confirm_maxsz; + encode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM, + decode_setclientid_confirm_maxsz, hdr); + encode_uint64(xdr, arg->clientid); + encode_nfs4_verifier(xdr, &arg->confirm); } -static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr) +static void encode_write(struct xdr_stream *xdr, const struct nfs_pgio_args *args, + struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 4); - *p = cpu_to_be32(OP_WRITE); - - encode_stateid(xdr, args->context, args->lock_context); + encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); p = reserve_space(xdr, 16); p = xdr_encode_hyper(p, args->offset); @@ -1600,42 +1716,93 @@ static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *arg *p = cpu_to_be32(args->count); xdr_write_pages(xdr, args->pages, args->pgbase, args->count); - hdr->nops++; - hdr->replen += decode_write_maxsz; } static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 4+NFS4_STATEID_SIZE); + encode_op_hdr(xdr, OP_DELEGRETURN, decode_delegreturn_maxsz, hdr); + encode_nfs4_stateid(xdr, stateid); +} - *p++ = cpu_to_be32(OP_DELEGRETURN); - xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE); - hdr->nops++; - hdr->replen += decode_delegreturn_maxsz; +static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_SECINFO, decode_secinfo_maxsz, hdr); + encode_string(xdr, name->len, name->name); } #if defined(CONFIG_NFS_V4_1) /* NFSv4.1 operations */ +static void encode_bind_conn_to_session(struct xdr_stream *xdr, + struct nfs4_session *session, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION, + decode_bind_conn_to_session_maxsz, hdr); + encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); + p = xdr_reserve_space(xdr, 8); + *p++ = cpu_to_be32(NFS4_CDFC4_BACK_OR_BOTH); + *p = 0; /* use_conn_in_rdma_mode = False */ +} + +static void encode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map) +{ + unsigned int i; + encode_uint32(xdr, NFS4_OP_MAP_NUM_WORDS); + for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) + encode_uint32(xdr, op_map->u.words[i]); +} + static void encode_exchange_id(struct xdr_stream *xdr, struct nfs41_exchange_id_args *args, struct compound_hdr *hdr) { __be32 *p; + char impl_name[IMPL_NAME_LIMIT]; + int len = 0; - p = reserve_space(xdr, 4 + sizeof(args->verifier->data)); - *p++ = cpu_to_be32(OP_EXCHANGE_ID); - xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data)); + encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr); + encode_nfs4_verifier(xdr, args->verifier); encode_string(xdr, args->id_len, args->id); - p = reserve_space(xdr, 12); - *p++ = cpu_to_be32(args->flags); - *p++ = cpu_to_be32(0); /* zero length state_protect4_a */ - *p = cpu_to_be32(0); /* zero length implementation id array */ - hdr->nops++; - hdr->replen += decode_exchange_id_maxsz; + encode_uint32(xdr, args->flags); + encode_uint32(xdr, args->state_protect.how); + + switch (args->state_protect.how) { + case SP4_NONE: + break; + case SP4_MACH_CRED: + encode_op_map(xdr, &args->state_protect.enforce); + encode_op_map(xdr, &args->state_protect.allow); + break; + default: + WARN_ON_ONCE(1); + break; + } + + if (send_implementation_id && + sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 && + sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) + <= sizeof(impl_name) + 1) + len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s", + utsname()->sysname, utsname()->release, + utsname()->version, utsname()->machine); + + if (len > 0) { + encode_uint32(xdr, 1); /* implementation id array length=1 */ + + encode_string(xdr, + sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - 1, + CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN); + encode_string(xdr, len, impl_name); + /* just send zeros for nii_date - the date is in nii_name */ + p = reserve_space(xdr, 12); + p = xdr_encode_hyper(p, 0); + *p = cpu_to_be32(0); + } else + encode_uint32(xdr, 0); /* implementation id array length=0 */ } static void encode_create_session(struct xdr_stream *xdr, @@ -1646,6 +1813,7 @@ static void encode_create_session(struct xdr_stream *xdr, char machine_name[NFS4_MAX_MACHINE_NAME_LEN]; uint32_t len; struct nfs_client *clp = args->client; + struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); u32 max_resp_sz_cached; /* @@ -1658,14 +1826,14 @@ static void encode_create_session(struct xdr_stream *xdr, len = scnprintf(machine_name, sizeof(machine_name), "%s", clp->cl_ipaddr); - p = reserve_space(xdr, 20 + 2*28 + 20 + len + 12); - *p++ = cpu_to_be32(OP_CREATE_SESSION); - p = xdr_encode_hyper(p, clp->cl_ex_clid); + encode_op_hdr(xdr, OP_CREATE_SESSION, decode_create_session_maxsz, hdr); + p = reserve_space(xdr, 16 + 2*28 + 20 + len + 12); + p = xdr_encode_hyper(p, clp->cl_clientid); *p++ = cpu_to_be32(clp->cl_seqid); /*Sequence id */ *p++ = cpu_to_be32(args->flags); /*flags */ /* Fore Channel */ - *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */ + *p++ = cpu_to_be32(0); /* header padding size */ *p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz); /* max req size */ *p++ = cpu_to_be32(args->fc_attrs.max_resp_sz); /* max resp size */ *p++ = cpu_to_be32(max_resp_sz_cached); /* Max resp sz cached */ @@ -1674,7 +1842,7 @@ static void encode_create_session(struct xdr_stream *xdr, *p++ = cpu_to_be32(0); /* rdmachannel_attrs */ /* Back Channel */ - *p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */ + *p++ = cpu_to_be32(0); /* header padding size */ *p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz); /* max req size */ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz); /* max resp size */ *p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached); /* Max resp sz cached */ @@ -1687,38 +1855,35 @@ static void encode_create_session(struct xdr_stream *xdr, *p++ = cpu_to_be32(RPC_AUTH_UNIX); /* auth_sys */ /* authsys_parms rfc1831 */ - *p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec); /* stamp */ + *p++ = cpu_to_be32(nn->boot_time.tv_nsec); /* stamp */ p = xdr_encode_opaque(p, machine_name, len); *p++ = cpu_to_be32(0); /* UID */ *p++ = cpu_to_be32(0); /* GID */ *p = cpu_to_be32(0); /* No more gids */ - hdr->nops++; - hdr->replen += decode_create_session_maxsz; } static void encode_destroy_session(struct xdr_stream *xdr, struct nfs4_session *session, struct compound_hdr *hdr) { - __be32 *p; - p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN); - *p++ = cpu_to_be32(OP_DESTROY_SESSION); - xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); - hdr->nops++; - hdr->replen += decode_destroy_session_maxsz; + encode_op_hdr(xdr, OP_DESTROY_SESSION, decode_destroy_session_maxsz, hdr); + encode_opaque_fixed(xdr, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); +} + +static void encode_destroy_clientid(struct xdr_stream *xdr, + uint64_t clientid, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_DESTROY_CLIENTID, decode_destroy_clientid_maxsz, hdr); + encode_uint64(xdr, clientid); } static void encode_reclaim_complete(struct xdr_stream *xdr, struct nfs41_reclaim_complete_args *args, struct compound_hdr *hdr) { - __be32 *p; - - p = reserve_space(xdr, 8); - *p++ = cpu_to_be32(OP_RECLAIM_COMPLETE); - *p++ = cpu_to_be32(args->one_fs); - hdr->nops++; - hdr->replen += decode_reclaim_complete_maxsz; + encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz, hdr); + encode_uint32(xdr, args->one_fs); } #endif /* CONFIG_NFS_V4_1 */ @@ -1727,21 +1892,17 @@ static void encode_sequence(struct xdr_stream *xdr, struct compound_hdr *hdr) { #if defined(CONFIG_NFS_V4_1) - struct nfs4_session *session = args->sa_session; + struct nfs4_session *session; struct nfs4_slot_table *tp; - struct nfs4_slot *slot; + struct nfs4_slot *slot = args->sa_slot; __be32 *p; + tp = slot->table; + session = tp->session; if (!session) return; - tp = &session->fc_slot_table; - - WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE); - slot = tp->slots + args->sa_slotid; - - p = reserve_space(xdr, 4 + NFS4_MAX_SESSIONID_LEN + 16); - *p++ = cpu_to_be32(OP_SEQUENCE); + encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr); /* * Sessionid + seqid + slotid + max slotid + cache_this @@ -1753,35 +1914,50 @@ static void encode_sequence(struct xdr_stream *xdr, ((u32 *)session->sess_id.data)[1], ((u32 *)session->sess_id.data)[2], ((u32 *)session->sess_id.data)[3], - slot->seq_nr, args->sa_slotid, + slot->seq_nr, slot->slot_nr, tp->highest_used_slotid, args->sa_cache_this); + p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16); p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(slot->seq_nr); - *p++ = cpu_to_be32(args->sa_slotid); + *p++ = cpu_to_be32(slot->slot_nr); *p++ = cpu_to_be32(tp->highest_used_slotid); *p = cpu_to_be32(args->sa_cache_this); - hdr->nops++; - hdr->replen += decode_sequence_maxsz; #endif /* CONFIG_NFS_V4_1 */ } #ifdef CONFIG_NFS_V4_1 static void +encode_getdevicelist(struct xdr_stream *xdr, + const struct nfs4_getdevicelist_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + nfs4_verifier dummy = { + .data = "dummmmmy", + }; + + encode_op_hdr(xdr, OP_GETDEVICELIST, decode_getdevicelist_maxsz, hdr); + p = reserve_space(xdr, 16); + *p++ = cpu_to_be32(args->layoutclass); + *p++ = cpu_to_be32(NFS4_PNFS_GETDEVLIST_MAXNUM); + xdr_encode_hyper(p, 0ULL); /* cookie */ + encode_nfs4_verifier(xdr, &dummy); +} + +static void encode_getdeviceinfo(struct xdr_stream *xdr, const struct nfs4_getdeviceinfo_args *args, struct compound_hdr *hdr) { __be32 *p; - p = reserve_space(xdr, 16 + NFS4_DEVICEID4_SIZE); - *p++ = cpu_to_be32(OP_GETDEVICEINFO); + encode_op_hdr(xdr, OP_GETDEVICEINFO, decode_getdeviceinfo_maxsz, hdr); + p = reserve_space(xdr, 12 + NFS4_DEVICEID4_SIZE); p = xdr_encode_opaque_fixed(p, args->pdev->dev_id.data, NFS4_DEVICEID4_SIZE); *p++ = cpu_to_be32(args->pdev->layout_type); - *p++ = cpu_to_be32(args->pdev->pglen); /* gdia_maxcount */ + *p++ = cpu_to_be32(args->pdev->maxcount); /* gdia_maxcount */ *p++ = cpu_to_be32(0); /* bitmap length 0 */ - hdr->nops++; - hdr->replen += decode_getdeviceinfo_maxsz; } static void @@ -1789,21 +1965,18 @@ encode_layoutget(struct xdr_stream *xdr, const struct nfs4_layoutget_args *args, struct compound_hdr *hdr) { - nfs4_stateid stateid; __be32 *p; - p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE); - *p++ = cpu_to_be32(OP_LAYOUTGET); + encode_op_hdr(xdr, OP_LAYOUTGET, decode_layoutget_maxsz, hdr); + p = reserve_space(xdr, 36); *p++ = cpu_to_be32(0); /* Signal layout available */ *p++ = cpu_to_be32(args->type); *p++ = cpu_to_be32(args->range.iomode); p = xdr_encode_hyper(p, args->range.offset); p = xdr_encode_hyper(p, args->range.length); p = xdr_encode_hyper(p, args->minlength); - pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout, - args->ctx->state); - p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE); - *p = cpu_to_be32(args->maxcount); + encode_nfs4_stateid(xdr, &args->stateid); + encode_uint32(xdr, args->maxcount); dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n", __func__, @@ -1812,8 +1985,92 @@ encode_layoutget(struct xdr_stream *xdr, (unsigned long)args->range.offset, (unsigned long)args->range.length, args->maxcount); - hdr->nops++; - hdr->replen += decode_layoutget_maxsz; +} + +static int +encode_layoutcommit(struct xdr_stream *xdr, + struct inode *inode, + const struct nfs4_layoutcommit_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten, + NFS_SERVER(args->inode)->pnfs_curr_ld->id); + + encode_op_hdr(xdr, OP_LAYOUTCOMMIT, decode_layoutcommit_maxsz, hdr); + p = reserve_space(xdr, 20); + /* Only whole file layouts */ + p = xdr_encode_hyper(p, 0); /* offset */ + p = xdr_encode_hyper(p, args->lastbytewritten + 1); /* length */ + *p = cpu_to_be32(0); /* reclaim */ + encode_nfs4_stateid(xdr, &args->stateid); + p = reserve_space(xdr, 20); + *p++ = cpu_to_be32(1); /* newoffset = TRUE */ + p = xdr_encode_hyper(p, args->lastbytewritten); + *p++ = cpu_to_be32(0); /* Never send time_modify_changed */ + *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */ + + if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit) + NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit( + NFS_I(inode)->layout, xdr, args); + else + encode_uint32(xdr, 0); /* no layout-type payload */ + + return 0; +} + +static void +encode_layoutreturn(struct xdr_stream *xdr, + const struct nfs4_layoutreturn_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + encode_op_hdr(xdr, OP_LAYOUTRETURN, decode_layoutreturn_maxsz, hdr); + p = reserve_space(xdr, 16); + *p++ = cpu_to_be32(0); /* reclaim. always 0 for now */ + *p++ = cpu_to_be32(args->layout_type); + *p++ = cpu_to_be32(IOMODE_ANY); + *p = cpu_to_be32(RETURN_FILE); + p = reserve_space(xdr, 16); + p = xdr_encode_hyper(p, 0); + p = xdr_encode_hyper(p, NFS4_MAX_UINT64); + spin_lock(&args->inode->i_lock); + encode_nfs4_stateid(xdr, &args->stateid); + spin_unlock(&args->inode->i_lock); + if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) { + NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn( + NFS_I(args->inode)->layout, xdr, args); + } else + encode_uint32(xdr, 0); +} + +static int +encode_secinfo_no_name(struct xdr_stream *xdr, + const struct nfs41_secinfo_no_name_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_SECINFO_NO_NAME, decode_secinfo_no_name_maxsz, hdr); + encode_uint32(xdr, args->style); + return 0; +} + +static void encode_test_stateid(struct xdr_stream *xdr, + struct nfs41_test_stateid_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_TEST_STATEID, decode_test_stateid_maxsz, hdr); + encode_uint32(xdr, 1); + encode_nfs4_stateid(xdr, args->stateid); +} + +static void encode_free_stateid(struct xdr_stream *xdr, + struct nfs41_free_stateid_args *args, + struct compound_hdr *hdr) +{ + encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr); + encode_nfs4_stateid(xdr, &args->stateid); } #endif /* CONFIG_NFS_V4_1 */ @@ -1824,8 +2081,9 @@ encode_layoutget(struct xdr_stream *xdr, static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) { #if defined(CONFIG_NFS_V4_1) - if (args->sa_session) - return args->sa_session->clp->cl_mvops->minor_version; + struct nfs4_session *session = args->sa_slot->table->session; + if (session) + return session->clp->cl_mvops->minor_version; #endif /* CONFIG_NFS_V4_1 */ return 0; } @@ -1833,393 +2091,355 @@ static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) /* * Encode an ACCESS request */ -static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args) +static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_accessargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_access(&xdr, args->access, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_access(xdr, args->access, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LOOKUP request */ -static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args) +static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_lookup_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_lookup(&xdr, args->name, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_lookup(xdr, args->name, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LOOKUP_ROOT request */ -static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args) +static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs4_lookup_root_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putrootfh(xdr, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode REMOVE request */ -static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs_removeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_remove(&xdr, &args->name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_remove(xdr, &args->name, &hdr); encode_nops(&hdr); - return 0; } /* * Encode RENAME request */ -static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args) +static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->old_dir, &hdr); - encode_savefh(&xdr, &hdr); - encode_putfh(&xdr, args->new_dir, &hdr); - encode_rename(&xdr, args->old_name, args->new_name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->old_dir, &hdr); + encode_savefh(xdr, &hdr); + encode_putfh(xdr, args->new_dir, &hdr); + encode_rename(xdr, args->old_name, args->new_name, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LINK request */ -static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args) +static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_link_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_link(&xdr, args->name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_savefh(xdr, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_link(xdr, args->name, &hdr); + encode_restorefh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode CREATE request */ -static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) +static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_create_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_create(&xdr, args, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_create(xdr, args, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode SYMLINK request */ -static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) +static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_create_arg *args) { - return nfs4_xdr_enc_create(req, p, args); + nfs4_xdr_enc_create(req, xdr, args); } /* * Encode GETATTR request */ -static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args) +static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_getattr_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a CLOSE request */ -static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) +static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_closeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_close(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_close(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN request */ -static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) +static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_openargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_open(&xdr, args, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open(xdr, args, &hdr); + encode_getfh(xdr, &hdr); + if (args->access) + encode_access(xdr, args->access, &hdr); + encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN_CONFIRM request */ -static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args) +static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_open_confirmargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open_confirm(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open_confirm(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN request with no attributes. */ -static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) +static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_openargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open(xdr, args, &hdr); + if (args->access) + encode_access(xdr, args->access, &hdr); + encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN_DOWNGRADE request */ -static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) +static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_closeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open_downgrade(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open_downgrade(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCK request */ -static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args) +static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_lock_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_lock(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_lock(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCKT request */ -static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args) +static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_lockt_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_lockt(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_lockt(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCKU request */ -static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args) +static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_locku_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_locku(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_locku(xdr, args, &hdr); encode_nops(&hdr); - return 0; } -static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args) +static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_release_lockowner_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_release_lockowner(&xdr, &args->lock_owner, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_release_lockowner(xdr, &args->lock_owner, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a READLINK request */ -static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args) +static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_readlink *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_readlink(&xdr, args, req, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_readlink(xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->pglen); encode_nops(&hdr); - return 0; } /* * Encode a READDIR request */ -static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args) +static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_readdir_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_readdir(&xdr, args, req, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_readdir(xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); @@ -2227,428 +2447,483 @@ static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nf __func__, hdr.replen << 2, args->pages, args->pgbase, args->count); encode_nops(&hdr); - return 0; } /* * Encode a READ request */ -static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) +static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_read(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_read(xdr, args, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); req->rq_rcv_buf.flags |= XDRBUF_READ; encode_nops(&hdr); - return 0; } /* * Encode an SETATTR request */ -static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args) +static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_setattrargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_setattr(&xdr, args, args->server, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_setattr(xdr, args, args->server, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a GETACL request */ -static int -nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p, - struct nfs_getaclargs *args) +static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_getaclargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1; - encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + replen = hdr.replen + op_decode_hdr_maxsz + 1; + encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, args->acl_pages, args->acl_pgbase, args->acl_len); + encode_nops(&hdr); - return 0; } /* * Encode a WRITE request */ -static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_pgio_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_write(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_write(xdr, args, &hdr); req->rq_snd_buf.flags |= XDRBUF_WRITE; - encode_getfattr(&xdr, args->bitmask, &hdr); + if (args->bitmask) + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * a COMMIT request */ -static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_commitargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_commit(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_commit(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * FSINFO request */ -static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args) +static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs4_fsinfo_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_fsinfo(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_fsinfo(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * a PATHCONF request */ -static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args) +static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_pathconf_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], &hdr); encode_nops(&hdr); - return 0; } /* * a STATFS request */ -static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args) +static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_statfs_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr); encode_nops(&hdr); - return 0; } /* * GETATTR_BITMAP request */ -static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, - struct nfs4_server_caps_arg *args) +static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_server_caps_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fhandle, &hdr); - encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS| + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fhandle, &hdr); + encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS| + FATTR4_WORD0_FH_EXPIRE_TYPE| FATTR4_WORD0_LINK_SUPPORT| FATTR4_WORD0_SYMLINK_SUPPORT| FATTR4_WORD0_ACLSUPPORT, &hdr); encode_nops(&hdr); - return 0; } /* * a RENEW request */ -static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) +static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_client *clp) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_renew(&xdr, clp, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_renew(xdr, clp->cl_clientid, &hdr); encode_nops(&hdr); - return 0; } /* * a SETCLIENTID request */ -static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc) +static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid *sc) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_setclientid(&xdr, sc, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_setclientid(xdr, sc, &hdr); encode_nops(&hdr); - return 0; } /* * a SETCLIENTID_CONFIRM request */ -static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg) +static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid_res *arg) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_setclientid_confirm(&xdr, arg, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_fsinfo(&xdr, lease_bitmap, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_setclientid_confirm(xdr, arg, &hdr); encode_nops(&hdr); - return 0; } /* * DELEGRETURN request */ -static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args) +static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs4_delegreturnargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fhandle, &hdr); - encode_delegreturn(&xdr, args->stateid, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fhandle, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_delegreturn(xdr, args->stateid, &hdr); encode_nops(&hdr); - return 0; } /* * Encode FS_LOCATIONS request */ -static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args) +static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_fs_locations_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_lookup(&xdr, args->name, &hdr); - replen = hdr.replen; /* get the attribute into args->page */ - encode_fs_locations(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + if (args->migration) { + encode_putfh(xdr, args->fh, &hdr); + replen = hdr.replen; + encode_fs_locations(xdr, args->bitmask, &hdr); + if (args->renew) + encode_renew(xdr, args->clientid, &hdr); + } else { + encode_putfh(xdr, args->dir_fh, &hdr); + encode_lookup(xdr, args->name, &hdr); + replen = hdr.replen; + encode_fs_locations(xdr, args->bitmask, &hdr); + } + /* Set up reply kvec to capture returned fs_locations array. */ xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page, 0, PAGE_SIZE); encode_nops(&hdr); - return 0; +} + +/* + * Encode SECINFO request + */ +static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_secinfo_arg *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_secinfo(xdr, args->name, &hdr); + encode_nops(&hdr); +} + +/* + * Encode FSID_PRESENT request + */ +static void nfs4_xdr_enc_fsid_present(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_fsid_present_arg *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getfh(xdr, &hdr); + if (args->renew) + encode_renew(xdr, args->clientid, &hdr); + encode_nops(&hdr); } #if defined(CONFIG_NFS_V4_1) /* + * BIND_CONN_TO_SESSION request + */ +static void nfs4_xdr_enc_bind_conn_to_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_client *clp) +{ + struct compound_hdr hdr = { + .minorversion = clp->cl_mvops->minor_version, + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_bind_conn_to_session(xdr, clp->cl_session, &hdr); + encode_nops(&hdr); +} + +/* * EXCHANGE_ID request */ -static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p, - struct nfs41_exchange_id_args *args) +static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_exchange_id_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_exchange_id(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_exchange_id(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a CREATE_SESSION request */ -static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p, - struct nfs41_create_session_args *args) +static void nfs4_xdr_enc_create_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_create_session_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_create_session(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_create_session(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a DESTROY_SESSION request */ -static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p, - struct nfs4_session *session) +static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_session *session) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = session->clp->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_destroy_session(&xdr, session, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_destroy_session(xdr, session, &hdr); + encode_nops(&hdr); +} + +/* + * a DESTROY_CLIENTID request + */ +static void nfs4_xdr_enc_destroy_clientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_client *clp) +{ + struct compound_hdr hdr = { + .minorversion = clp->cl_mvops->minor_version, + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_destroy_clientid(xdr, clp->cl_clientid, &hdr); encode_nops(&hdr); - return 0; } /* * a SEQUENCE request */ -static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p, - struct nfs4_sequence_args *args) +static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs4_sequence_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a GET_LEASE_TIME request */ -static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p, - struct nfs4_get_lease_time_args *args) +static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_get_lease_time_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->la_seq_args), }; - const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; + const u32 lease_bitmap[3] = { FATTR4_WORD0_LEASE_TIME }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->la_seq_args, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_fsinfo(&xdr, lease_bitmap, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->la_seq_args, &hdr); + encode_putrootfh(xdr, &hdr); + encode_fsinfo(xdr, lease_bitmap, &hdr); encode_nops(&hdr); - return 0; } /* * a RECLAIM_COMPLETE request */ -static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p, - struct nfs41_reclaim_complete_args *args) +static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_reclaim_complete_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args) }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_reclaim_complete(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_reclaim_complete(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * Encode GETDEVICELIST request + */ +static void nfs4_xdr_enc_getdevicelist(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_getdevicelist_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getdevicelist(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode GETDEVICEINFO request */ -static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p, - struct nfs4_getdeviceinfo_args *args) +static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_getdeviceinfo_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_getdeviceinfo(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_getdeviceinfo(xdr, args, &hdr); /* set up reply kvec. Subtract notification bitmap max size (2) * so that notification bitmap is put in xdr_buf tail */ @@ -2657,28 +2932,121 @@ static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p, args->pdev->pglen); encode_nops(&hdr); - return 0; } /* * Encode LAYOUTGET request */ -static int nfs4_xdr_enc_layoutget(struct rpc_rqst *req, uint32_t *p, - struct nfs4_layoutget_args *args) +static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_layoutget_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, NFS_FH(args->inode), &hdr); - encode_layoutget(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, NFS_FH(args->inode), &hdr); + encode_layoutget(xdr, args, &hdr); + + xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, + args->layout.pages, 0, args->layout.pglen); + + encode_nops(&hdr); +} + +/* + * Encode LAYOUTCOMMIT request + */ +static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_layoutcommit_args *args) +{ + struct nfs4_layoutcommit_data *data = + container_of(args, struct nfs4_layoutcommit_data, args); + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, NFS_FH(args->inode), &hdr); + encode_layoutcommit(xdr, data->args.inode, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_nops(&hdr); +} + +/* + * Encode LAYOUTRETURN request + */ +static void nfs4_xdr_enc_layoutreturn(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_layoutreturn_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, NFS_FH(args->inode), &hdr); + encode_layoutreturn(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * Encode SECINFO_NO_NAME request + */ +static int nfs4_xdr_enc_secinfo_no_name(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_secinfo_no_name_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putrootfh(xdr, &hdr); + encode_secinfo_no_name(xdr, args, &hdr); encode_nops(&hdr); return 0; } + +/* + * Encode TEST_STATEID request + */ +static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_test_stateid_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_test_stateid(xdr, args, &hdr); + encode_nops(&hdr); +} + +/* + * Encode FREE_STATEID request + */ +static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_free_stateid_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_free_stateid(xdr, args, &hdr); + encode_nops(&hdr); +} #endif /* CONFIG_NFS_V4_1 */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) @@ -2730,7 +3098,8 @@ out_overflow: return -EIO; } -static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) +static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected, + int *nfs_retval) { __be32 *p; uint32_t opnum; @@ -2740,19 +3109,32 @@ static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) if (unlikely(!p)) goto out_overflow; opnum = be32_to_cpup(p++); - if (opnum != expected) { - dprintk("nfs: Server returned operation" - " %d but we issued a request for %d\n", - opnum, expected); - return -EIO; - } + if (unlikely(opnum != expected)) + goto out_bad_operation; nfserr = be32_to_cpup(p); - if (nfserr != NFS_OK) - return nfs4_stat_to_errno(nfserr); - return 0; + if (nfserr == NFS_OK) + *nfs_retval = 0; + else + *nfs_retval = nfs4_stat_to_errno(nfserr); + return true; +out_bad_operation: + dprintk("nfs: Server returned operation" + " %d but we issued a request for %d\n", + opnum, expected); + *nfs_retval = -EREMOTEIO; + return false; out_overflow: print_overflow_msg(__func__, xdr); - return -EIO; + *nfs_retval = -EIO; + return false; +} + +static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) +{ + int retval; + + __decode_op_hdr(xdr, expected, &retval); + return retval; } /* Dummy routine */ @@ -2779,14 +3161,17 @@ static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) goto out_overflow; bmlen = be32_to_cpup(p); - bitmap[0] = bitmap[1] = 0; + bitmap[0] = bitmap[1] = bitmap[2] = 0; p = xdr_inline_decode(xdr, (bmlen << 2)); if (unlikely(!p)) goto out_overflow; if (bmlen > 0) { bitmap[0] = be32_to_cpup(p++); - if (bmlen > 1) - bitmap[1] = be32_to_cpup(p); + if (bmlen > 1) { + bitmap[1] = be32_to_cpup(p++); + if (bmlen > 2) + bitmap[2] = be32_to_cpup(p); + } } return 0; out_overflow: @@ -2794,7 +3179,7 @@ out_overflow: return -EIO; } -static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, __be32 **savep) +static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigned int *savep) { __be32 *p; @@ -2802,7 +3187,7 @@ static inline int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, if (unlikely(!p)) goto out_overflow; *attrlen = be32_to_cpup(p); - *savep = xdr->p; + *savep = xdr_stream_pos(xdr); return 0; out_overflow: print_overflow_msg(__func__, xdr); @@ -2818,8 +3203,9 @@ static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint3 return ret; bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS; } else - bitmask[0] = bitmask[1] = 0; - dprintk("%s: bitmask=%08x:%08x\n", __func__, bitmask[0], bitmask[1]); + bitmask[0] = bitmask[1] = bitmask[2] = 0; + dprintk("%s: bitmask=%08x:%08x:%08x\n", __func__, + bitmask[0], bitmask[1], bitmask[2]); return 0; } @@ -2850,6 +3236,28 @@ out_overflow: return -EIO; } +static int decode_attr_fh_expire_type(struct xdr_stream *xdr, + uint32_t *bitmap, uint32_t *type) +{ + __be32 *p; + + *type = 0; + if (unlikely(bitmap[0] & (FATTR4_WORD0_FH_EXPIRE_TYPE - 1U))) + return -EIO; + if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + *type = be32_to_cpup(p); + bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE; + } + dprintk("%s: expire type=0x%x\n", __func__, *type); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change) { __be32 *p; @@ -2987,7 +3395,7 @@ out_overflow: return -EIO; } -static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap) +static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res) { __be32 *p; @@ -2998,6 +3406,7 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap) if (unlikely(!p)) goto out_overflow; bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR; + *res = -be32_to_cpup(p); } return 0; out_overflow: @@ -3041,7 +3450,7 @@ static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint { __be32 *p; - *res = ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL; + *res = 0; if (unlikely(bitmap[0] & (FATTR4_WORD0_ACLSUPPORT - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) { @@ -3095,7 +3504,7 @@ static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitma goto out_overflow; xdr_decode_hyper(p, fileid); bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; - ret = NFS_ATTR_FATTR_FILEID; + ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID; } dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid); return ret; @@ -3182,32 +3591,29 @@ static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path) n = be32_to_cpup(p); if (n == 0) goto root_path; - dprintk("path "); - path->ncomponents = 0; - while (path->ncomponents < n) { + dprintk("pathname4: "); + if (n > NFS4_PATHNAME_MAXCOMPONENTS) { + dprintk("cannot parse %d components in path\n", n); + goto out_eio; + } + for (path->ncomponents = 0; path->ncomponents < n; path->ncomponents++) { struct nfs4_string *component = &path->components[path->ncomponents]; status = decode_opaque_inline(xdr, &component->len, &component->data); if (unlikely(status != 0)) goto out_eio; - if (path->ncomponents != n) - dprintk("/"); - dprintk("%s", component->data); - if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS) - path->ncomponents++; - else { - dprintk("cannot parse %d components in path\n", n); - goto out_eio; - } + ifdebug (XDR) + pr_cont("%s%.*s ", + (path->ncomponents != n ? "/ " : ""), + component->len, component->data); } out: - dprintk("\n"); return status; root_path: /* a root pathname is sent as a zero component4 */ path->ncomponents = 1; path->components[0].len=0; path->components[0].data=NULL; - dprintk("path /\n"); + dprintk("pathname4: /\n"); goto out; out_eio: dprintk(" status %d", status); @@ -3229,7 +3635,11 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st status = 0; if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS))) goto out; - dprintk("%s: fsroot ", __func__); + status = -EIO; + /* Ignore borken servers that return unrequested attrs */ + if (unlikely(res == NULL)) + goto out; + dprintk("%s: fsroot:\n", __func__); status = decode_pathname(xdr, &res->fs_path); if (unlikely(status != 0)) goto out; @@ -3239,27 +3649,23 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st n = be32_to_cpup(p); if (n <= 0) goto out_eio; - res->nlocations = 0; - while (res->nlocations < n) { + for (res->nlocations = 0; res->nlocations < n; res->nlocations++) { u32 m; - struct nfs4_fs_location *loc = &res->locations[res->nlocations]; + struct nfs4_fs_location *loc; + if (res->nlocations == NFS4_FS_LOCATIONS_MAXENTRIES) + break; + loc = &res->locations[res->nlocations]; p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; m = be32_to_cpup(p); - loc->nservers = 0; - dprintk("%s: servers ", __func__); - while (loc->nservers < m) { - struct nfs4_string *server = &loc->servers[loc->nservers]; - status = decode_opaque_inline(xdr, &server->len, &server->data); - if (unlikely(status != 0)) - goto out_eio; - dprintk("%s ", server->data); - if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS) - loc->nservers++; - else { + dprintk("%s: servers:\n", __func__); + for (loc->nservers = 0; loc->nservers < m; loc->nservers++) { + struct nfs4_string *server; + + if (loc->nservers == NFS4_FS_LOCATION_MAXSERVERS) { unsigned int i; dprintk("%s: using first %u of %u servers " "returned for location %u\n", @@ -3273,16 +3679,20 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st if (unlikely(status != 0)) goto out_eio; } + break; } + server = &loc->servers[loc->nservers]; + status = decode_opaque_inline(xdr, &server->len, &server->data); + if (unlikely(status != 0)) + goto out_eio; + dprintk("%s ", server->data); } status = decode_pathname(xdr, &loc->rootpath); if (unlikely(status != 0)) goto out_eio; - if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES) - res->nlocations++; } if (res->nlocations != 0) - status = NFS_ATTR_FATTR_V4_REFERRAL; + status = NFS_ATTR_FATTR_V4_LOCATIONS; out: dprintk("%s: fs_locations done, error = %d\n", __func__, status); return status; @@ -3460,13 +3870,14 @@ out_overflow: } static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, - struct nfs_client *clp, uint32_t *uid, int may_sleep) + const struct nfs_server *server, kuid_t *uid, + struct nfs4_string *owner_name) { uint32_t len; __be32 *p; int ret = 0; - *uid = -2; + *uid = make_kuid(&init_user_ns, -2); if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_OWNER)) { @@ -3477,10 +3888,14 @@ static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; - if (!may_sleep) { - /* do nothing */ + if (owner_name != NULL) { + owner_name->data = kmemdup(p, len, GFP_NOWAIT); + if (owner_name->data != NULL) { + owner_name->len = len; + ret = NFS_ATTR_FATTR_OWNER_NAME; + } } else if (len < XDR_MAX_NETOBJ) { - if (nfs_map_name_to_uid(clp, (char *)p, len, uid) == 0) + if (nfs_map_name_to_uid(server, (char *)p, len, uid) == 0) ret = NFS_ATTR_FATTR_OWNER; else dprintk("%s: nfs_map_name_to_uid failed!\n", @@ -3490,7 +3905,7 @@ static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, __func__, len); bitmap[1] &= ~FATTR4_WORD1_OWNER; } - dprintk("%s: uid=%d\n", __func__, (int)*uid); + dprintk("%s: uid=%d\n", __func__, (int)from_kuid(&init_user_ns, *uid)); return ret; out_overflow: print_overflow_msg(__func__, xdr); @@ -3498,13 +3913,14 @@ out_overflow: } static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, - struct nfs_client *clp, uint32_t *gid, int may_sleep) + const struct nfs_server *server, kgid_t *gid, + struct nfs4_string *group_name) { uint32_t len; __be32 *p; int ret = 0; - *gid = -2; + *gid = make_kgid(&init_user_ns, -2); if (unlikely(bitmap[1] & (FATTR4_WORD1_OWNER_GROUP - 1U))) return -EIO; if (likely(bitmap[1] & FATTR4_WORD1_OWNER_GROUP)) { @@ -3515,10 +3931,14 @@ static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, p = xdr_inline_decode(xdr, len); if (unlikely(!p)) goto out_overflow; - if (!may_sleep) { - /* do nothing */ + if (group_name != NULL) { + group_name->data = kmemdup(p, len, GFP_NOWAIT); + if (group_name->data != NULL) { + group_name->len = len; + ret = NFS_ATTR_FATTR_GROUP_NAME; + } } else if (len < XDR_MAX_NETOBJ) { - if (nfs_map_group_to_gid(clp, (char *)p, len, gid) == 0) + if (nfs_map_group_to_gid(server, (char *)p, len, gid) == 0) ret = NFS_ATTR_FATTR_GROUP; else dprintk("%s: nfs_map_group_to_gid failed!\n", @@ -3528,7 +3948,7 @@ static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, __func__, len); bitmap[1] &= ~FATTR4_WORD1_OWNER_GROUP; } - dprintk("%s: gid=%d\n", __func__, (int)*gid); + dprintk("%s: gid=%d\n", __func__, (int)from_kgid(&init_user_ns, *gid)); return ret; out_overflow: print_overflow_msg(__func__, xdr); @@ -3728,6 +4148,56 @@ static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap, return status; } +static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap, + struct nfs4_label *label) +{ + uint32_t pi = 0; + uint32_t lfs = 0; + __u32 len; + __be32 *p; + int status = 0; + + if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U))) + return -EIO; + if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + lfs = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + pi = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + len = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + goto out_overflow; + if (len < NFS4_MAXLABELLEN) { + if (label) { + memcpy(label->label, p, len); + label->len = len; + label->pi = pi; + label->lfs = lfs; + status = NFS_ATTR_FATTR_V4_SECURITY_LABEL; + } + bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + } else + printk(KERN_WARNING "%s: label too long (%u)!\n", + __func__, len); + } + if (label && label->label) + dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__, + (char *)label->label, label->len, label->pi, label->lfs); + return status; + +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) { int status = 0; @@ -3746,10 +4216,10 @@ static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, str return status; } -static int verify_attr_len(struct xdr_stream *xdr, __be32 *savep, uint32_t attrlen) +static int verify_attr_len(struct xdr_stream *xdr, unsigned int savep, uint32_t attrlen) { unsigned int attrwords = XDR_QUADLEN(attrlen); - unsigned int nwords = xdr->p - savep; + unsigned int nwords = (xdr_stream_pos(xdr) - savep) >> 2; if (unlikely(attrwords != nwords)) { dprintk("%s: server returned incorrect attribute length: " @@ -3779,7 +4249,7 @@ out_overflow: return -EIO; } -static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access) +static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access) { __be32 *p; uint32_t supp, acc; @@ -3793,8 +4263,8 @@ static int decode_access(struct xdr_stream *xdr, struct nfs4_accessres *access) goto out_overflow; supp = be32_to_cpup(p++); acc = be32_to_cpup(p); - access->supported = supp; - access->access = acc; + *supported = supp; + *access = acc; return 0; out_overflow: print_overflow_msg(__func__, xdr); @@ -3816,7 +4286,7 @@ static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len) static int decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) { - return decode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE); + return decode_opaque_fixed(xdr, stateid, NFS4_STATEID_SIZE); } static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res) @@ -3833,16 +4303,21 @@ static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res) static int decode_verifier(struct xdr_stream *xdr, void *verifier) { - return decode_opaque_fixed(xdr, verifier, 8); + return decode_opaque_fixed(xdr, verifier, NFS4_VERIFIER_SIZE); } -static int decode_commit(struct xdr_stream *xdr, struct nfs_writeres *res) +static int decode_write_verifier(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) +{ + return decode_opaque_fixed(xdr, verifier->data, NFS4_VERIFIER_SIZE); +} + +static int decode_commit(struct xdr_stream *xdr, struct nfs_commitres *res) { int status; status = decode_op_hdr(xdr, OP_COMMIT); if (!status) - status = decode_verifier(xdr, res->verf->verifier); + status = decode_write_verifier(xdr, &res->verf->verifier); return status; } @@ -3871,8 +4346,8 @@ out_overflow: static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_res *res) { - __be32 *savep; - uint32_t attrlen, bitmap[2] = {0}; + unsigned int savep; + uint32_t attrlen, bitmap[3] = {0}; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) @@ -3883,6 +4358,9 @@ static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_re goto xdr_error; if ((status = decode_attr_supported(xdr, bitmap, res->attr_bitmask)) != 0) goto xdr_error; + if ((status = decode_attr_fh_expire_type(xdr, bitmap, + &res->fh_expire_type)) != 0) + goto xdr_error; if ((status = decode_attr_link_support(xdr, bitmap, &res->has_links)) != 0) goto xdr_error; if ((status = decode_attr_symlink_support(xdr, bitmap, &res->has_symlinks)) != 0) @@ -3897,8 +4375,8 @@ xdr_error: static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat) { - __be32 *savep; - uint32_t attrlen, bitmap[2] = {0}; + unsigned int savep; + uint32_t attrlen, bitmap[3] = {0}; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) @@ -3929,8 +4407,8 @@ xdr_error: static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf) { - __be32 *savep; - uint32_t attrlen, bitmap[2] = {0}; + unsigned int savep; + uint32_t attrlen, bitmap[3] = {0}; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) @@ -3951,14 +4429,124 @@ xdr_error: return status; } +static int decode_threshold_hint(struct xdr_stream *xdr, + uint32_t *bitmap, + uint64_t *res, + uint32_t hint_bit) +{ + __be32 *p; + + *res = 0; + if (likely(bitmap[0] & hint_bit)) { + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + goto out_overflow; + xdr_decode_hyper(p, res); + } + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_first_threshold_item4(struct xdr_stream *xdr, + struct nfs4_threshold *res) +{ + __be32 *p; + unsigned int savep; + uint32_t bitmap[3] = {0,}, attrlen; + int status; + + /* layout type */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) { + print_overflow_msg(__func__, xdr); + return -EIO; + } + res->l_type = be32_to_cpup(p); + + /* thi_hintset bitmap */ + status = decode_attr_bitmap(xdr, bitmap); + if (status < 0) + goto xdr_error; + + /* thi_hintlist length */ + status = decode_attr_length(xdr, &attrlen, &savep); + if (status < 0) + goto xdr_error; + /* thi_hintlist */ + status = decode_threshold_hint(xdr, bitmap, &res->rd_sz, THRESHOLD_RD); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->wr_sz, THRESHOLD_WR); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->rd_io_sz, + THRESHOLD_RD_IO); + if (status < 0) + goto xdr_error; + status = decode_threshold_hint(xdr, bitmap, &res->wr_io_sz, + THRESHOLD_WR_IO); + if (status < 0) + goto xdr_error; + + status = verify_attr_len(xdr, savep, attrlen); + res->bm = bitmap[0]; + + dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", + __func__, res->bm, res->rd_sz, res->wr_sz, res->rd_io_sz, + res->wr_io_sz); +xdr_error: + dprintk("%s ret=%d!\n", __func__, status); + return status; +} + +/* + * Thresholds on pNFS direct I/O vrs MDS I/O + */ +static int decode_attr_mdsthreshold(struct xdr_stream *xdr, + uint32_t *bitmap, + struct nfs4_threshold *res) +{ + __be32 *p; + int status = 0; + uint32_t num; + + if (unlikely(bitmap[2] & (FATTR4_WORD2_MDSTHRESHOLD - 1U))) + return -EIO; + if (bitmap[2] & FATTR4_WORD2_MDSTHRESHOLD) { + /* Did the server return an unrequested attribute? */ + if (unlikely(res == NULL)) + return -EREMOTEIO; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + num = be32_to_cpup(p); + if (num == 0) + return 0; + if (num > 1) + printk(KERN_INFO "%s: Warning: Multiple pNFS layout " + "drivers per filesystem not supported\n", + __func__); + + status = decode_first_threshold_item4(xdr, res); + bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD; + } + return status; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fattr *fattr, struct nfs_fh *fh, - const struct nfs_server *server, int may_sleep) + struct nfs4_fs_locations *fs_loc, struct nfs4_label *label, + const struct nfs_server *server) { int status; umode_t fmode = 0; - uint64_t fileid; uint32_t type; + int32_t err; status = decode_attr_type(xdr, bitmap, &type); if (status < 0) @@ -3984,7 +4572,8 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; - status = decode_attr_error(xdr, bitmap); + err = 0; + status = decode_attr_error(xdr, bitmap, &err); if (status < 0) goto xdr_error; @@ -3997,9 +4586,7 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; - status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr, - struct nfs4_fs_locations, - fattr)); + status = decode_attr_fs_locations(xdr, bitmap, fs_loc); if (status < 0) goto xdr_error; fattr->valid |= status; @@ -4017,14 +4604,12 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; - status = decode_attr_owner(xdr, bitmap, server->nfs_client, - &fattr->uid, may_sleep); + status = decode_attr_owner(xdr, bitmap, server, &fattr->uid, fattr->owner_name); if (status < 0) goto xdr_error; fattr->valid |= status; - status = decode_attr_group(xdr, bitmap, server->nfs_client, - &fattr->gid, may_sleep); + status = decode_attr_group(xdr, bitmap, server, &fattr->gid, fattr->group_name); if (status < 0) goto xdr_error; fattr->valid |= status; @@ -4054,11 +4639,19 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; - status = decode_attr_mounted_on_fileid(xdr, bitmap, &fileid); + status = decode_attr_mounted_on_fileid(xdr, bitmap, &fattr->mounted_on_fileid); + if (status < 0) + goto xdr_error; + fattr->valid |= status; + + status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold); if (status < 0) goto xdr_error; - if (status != 0 && !(fattr->valid & status)) { - fattr->fileid = fileid; + + if (label) { + status = decode_attr_security_label(xdr, bitmap, label); + if (status < 0) + goto xdr_error; fattr->valid |= status; } @@ -4068,11 +4661,12 @@ xdr_error: } static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr, - struct nfs_fh *fh, const struct nfs_server *server, int may_sleep) + struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc, + struct nfs4_label *label, const struct nfs_server *server) { - __be32 *savep; + unsigned int savep; uint32_t attrlen, - bitmap[2] = {0}; + bitmap[3] = {0}; int status; status = decode_op_hdr(xdr, OP_GETATTR); @@ -4087,7 +4681,8 @@ static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fat if (status < 0) goto xdr_error; - status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep); + status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, + label, server); if (status < 0) goto xdr_error; @@ -4097,10 +4692,16 @@ xdr_error: return status; } +static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr, + struct nfs4_label *label, const struct nfs_server *server) +{ + return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server); +} + static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, - const struct nfs_server *server, int may_sleep) + const struct nfs_server *server) { - return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep); + return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server); } /* @@ -4110,7 +4711,7 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, static int decode_first_pnfs_layout_type(struct xdr_stream *xdr, uint32_t *layouttype) { - uint32_t *p; + __be32 *p; int num; p = xdr_inline_decode(xdr, 4); @@ -4124,8 +4725,8 @@ static int decode_first_pnfs_layout_type(struct xdr_stream *xdr, return 0; } if (num > 1) - printk(KERN_INFO "%s: Warning: Multiple pNFS layout drivers " - "per filesystem not supported\n", __func__); + printk(KERN_INFO "NFS: %s: Warning: Multiple pNFS layout " + "drivers per filesystem not supported\n", __func__); /* Decode and set first layout type, move xdr->p past unused types */ p = xdr_inline_decode(xdr, num * 4); @@ -4158,10 +4759,32 @@ static int decode_attr_pnfstype(struct xdr_stream *xdr, uint32_t *bitmap, return status; } +/* + * The prefered block size for layout directed io + */ +static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap, + uint32_t *res) +{ + __be32 *p; + + dprintk("%s: bitmap is %x\n", __func__, bitmap[2]); + *res = 0; + if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) { + print_overflow_msg(__func__, xdr); + return -EIO; + } + *res = be32_to_cpup(p); + bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE; + } + return 0; +} + static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) { - __be32 *savep; - uint32_t attrlen, bitmap[2]; + unsigned int savep; + uint32_t attrlen, bitmap[3]; int status; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) @@ -4189,6 +4812,9 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype); if (status != 0) goto xdr_error; + status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize); + if (status) + goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: @@ -4390,11 +5016,12 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res) uint32_t savewords, bmlen, i; int status; - status = decode_op_hdr(xdr, OP_OPEN); - if (status != -EIO) - nfs_increment_open_seqid(status, res->seqid); - if (!status) - status = decode_stateid(xdr, &res->stateid); + if (!__decode_op_hdr(xdr, OP_OPEN, &status)) + return status; + nfs_increment_open_seqid(status, res->seqid); + if (status) + return status; + status = decode_stateid(xdr, &res->stateid); if (unlikely(status)) return status; @@ -4460,11 +5087,11 @@ static int decode_putrootfh(struct xdr_stream *xdr) return decode_op_hdr(xdr, OP_PUTROOTFH); } -static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_readres *res) +static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, + struct nfs_pgio_res *res) { - struct kvec *iov = req->rq_rcv_buf.head; __be32 *p; - uint32_t count, eof, recvd, hdrlen; + uint32_t count, eof, recvd; int status; status = decode_op_hdr(xdr, OP_READ); @@ -4475,15 +5102,13 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_ goto out_overflow; eof = be32_to_cpup(p++); count = be32_to_cpup(p); - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - recvd = req->rq_rcv_buf.len - hdrlen; + recvd = xdr_read_pages(xdr, count); if (count > recvd) { dprintk("NFS: server cheating in read reply: " "count %u > recvd %u\n", count, recvd); count = recvd; eof = 0; } - xdr_read_pages(xdr, count); res->eof = eof; res->count = count; return 0; @@ -4494,38 +5119,23 @@ out_overflow: static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; - u32 recvd, pglen = rcvbuf->page_len; int status; + __be32 verf[2]; status = decode_op_hdr(xdr, OP_READDIR); if (!status) status = decode_verifier(xdr, readdir->verifier.data); if (unlikely(status)) return status; + memcpy(verf, readdir->verifier.data, sizeof(verf)); dprintk("%s: verifier = %08x:%08x\n", - __func__, - ((u32 *)readdir->verifier.data)[0], - ((u32 *)readdir->verifier.data)[1]); - - - hdrlen = (char *) xdr->p - (char *) iov->iov_base; - recvd = rcvbuf->len - hdrlen; - if (pglen > recvd) - pglen = recvd; - xdr_read_pages(xdr, pglen); - - - return 0; + __func__, verf[0], verf[1]); + return xdr_read_pages(xdr, xdr->buf->page_len); } static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) { struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; u32 len, recvd; __be32 *p; int status; @@ -4543,14 +5153,12 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) dprintk("nfs: server returned giant symlink!\n"); return -ENAMETOOLONG; } - hdrlen = (char *) xdr->p - (char *) iov->iov_base; - recvd = req->rq_rcv_buf.len - hdrlen; + recvd = xdr_read_pages(xdr, len); if (recvd < len) { dprintk("NFS: server cheating in readlink reply: " "count %u > recvd %u\n", len, recvd); return -EIO; } - xdr_read_pages(xdr, len); /* * The XDR encode routine has set things up so that * the link text will be copied directly into the @@ -4604,17 +5212,23 @@ decode_restorefh(struct xdr_stream *xdr) } static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, - size_t *acl_len) + struct nfs_getaclres *res) { - __be32 *savep; + unsigned int savep; uint32_t attrlen, - bitmap[2] = {0}; - struct kvec *iov = req->rq_rcv_buf.head; + bitmap[3] = {0}; int status; + unsigned int pg_offset; - *acl_len = 0; + res->acl_len = 0; if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0) goto out; + + xdr_enter_page(xdr, xdr->buf->page_len); + + /* Calculate the offset of the page data */ + pg_offset = xdr->buf->head[0].iov_len; + if ((status = decode_attr_bitmap(xdr, bitmap)) != 0) goto out; if ((status = decode_attr_length(xdr, &attrlen, &savep)) != 0) @@ -4623,21 +5237,20 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, if (unlikely(bitmap[0] & (FATTR4_WORD0_ACL - 1U))) return -EIO; if (likely(bitmap[0] & FATTR4_WORD0_ACL)) { - size_t hdrlen; - u32 recvd; - - /* We ignore &savep and don't do consistency checks on - * the attr length. Let userspace figure it out.... */ - hdrlen = (u8 *)xdr->p - (u8 *)iov->iov_base; - recvd = req->rq_rcv_buf.len - hdrlen; - if (attrlen > recvd) { - dprintk("NFS: server cheating in getattr" - " acl reply: attrlen %u > recvd %u\n", - attrlen, recvd); - return -EINVAL; + + /* The bitmap (xdr len + bitmaps) and the attr xdr len words + * are stored with the acl data to handle the problem of + * variable length bitmaps.*/ + res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset; + res->acl_len = attrlen; + + /* Check for receive buffer overflow */ + if (res->acl_len > (xdr->nwords << 2) || + res->acl_len + res->acl_data_offset > xdr->buf->page_len) { + res->acl_flags |= NFS4_ACL_TRUNC; + dprintk("NFS: acl reply: attrlen %u > page_len %u\n", + attrlen, xdr->nwords << 2); } - xdr_read_pages(xdr, attrlen); - *acl_len = attrlen; } else status = -EOPNOTSUPP; @@ -4729,7 +5342,7 @@ static int decode_setclientid_confirm(struct xdr_stream *xdr) return decode_op_hdr(xdr, OP_SETCLIENTID_CONFIRM); } -static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res) +static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res) { __be32 *p; int status; @@ -4738,13 +5351,12 @@ static int decode_write(struct xdr_stream *xdr, struct nfs_writeres *res) if (status) return status; - p = xdr_inline_decode(xdr, 16); + p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; res->count = be32_to_cpup(p++); res->verf->committed = be32_to_cpup(p++); - memcpy(res->verf->verifier, p, 8); - return 0; + return decode_write_verifier(xdr, &res->verf->verifier); out_overflow: print_overflow_msg(__func__, xdr); return -EIO; @@ -4755,7 +5367,114 @@ static int decode_delegreturn(struct xdr_stream *xdr) return decode_op_hdr(xdr, OP_DELEGRETURN); } +static int decode_secinfo_gss(struct xdr_stream *xdr, + struct nfs4_secinfo4 *flavor) +{ + u32 oid_len; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + oid_len = be32_to_cpup(p); + if (oid_len > GSS_OID_MAX_LEN) + goto out_err; + + p = xdr_inline_decode(xdr, oid_len); + if (unlikely(!p)) + goto out_overflow; + memcpy(flavor->flavor_info.oid.data, p, oid_len); + flavor->flavor_info.oid.len = oid_len; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + goto out_overflow; + flavor->flavor_info.qop = be32_to_cpup(p++); + flavor->flavor_info.service = be32_to_cpup(p); + + return 0; + +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +out_err: + return -EINVAL; +} + +static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res) +{ + struct nfs4_secinfo4 *sec_flavor; + unsigned int i, num_flavors; + int status; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + + res->flavors->num_flavors = 0; + num_flavors = be32_to_cpup(p); + + for (i = 0; i < num_flavors; i++) { + sec_flavor = &res->flavors->flavors[i]; + if ((char *)&sec_flavor[1] - (char *)res->flavors > PAGE_SIZE) + break; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + sec_flavor->flavor = be32_to_cpup(p); + + if (sec_flavor->flavor == RPC_AUTH_GSS) { + status = decode_secinfo_gss(xdr, sec_flavor); + if (status) + goto out; + } + res->flavors->num_flavors++; + } + + status = 0; +out: + return status; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res) +{ + int status = decode_op_hdr(xdr, OP_SECINFO); + if (status) + return status; + return decode_secinfo_common(xdr, res); +} + #if defined(CONFIG_NFS_V4_1) +static int decode_secinfo_no_name(struct xdr_stream *xdr, struct nfs4_secinfo_res *res) +{ + int status = decode_op_hdr(xdr, OP_SECINFO_NO_NAME); + if (status) + return status; + return decode_secinfo_common(xdr, res); +} + +static int decode_op_map(struct xdr_stream *xdr, struct nfs4_op_map *op_map) +{ + __be32 *p; + uint32_t bitmap_words; + unsigned int i; + + p = xdr_inline_decode(xdr, 4); + bitmap_words = be32_to_cpup(p++); + if (bitmap_words > NFS4_OP_MAP_NUM_WORDS) + return -EIO; + p = xdr_inline_decode(xdr, 4 * bitmap_words); + for (i = 0; i < bitmap_words; i++) + op_map->u.words[i] = be32_to_cpup(p++); + + return 0; +} + static int decode_exchange_id(struct xdr_stream *xdr, struct nfs41_exchange_id_res *res) { @@ -4763,7 +5482,7 @@ static int decode_exchange_id(struct xdr_stream *xdr, uint32_t dummy; char *dummy_str; int status; - struct nfs_client *clp = res->client; + uint32_t impl_id_count; status = decode_op_hdr(xdr, OP_EXCHANGE_ID); if (status) @@ -4772,38 +5491,86 @@ static int decode_exchange_id(struct xdr_stream *xdr, p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; - xdr_decode_hyper(p, &clp->cl_ex_clid); + xdr_decode_hyper(p, &res->clientid); p = xdr_inline_decode(xdr, 12); if (unlikely(!p)) goto out_overflow; - clp->cl_seqid = be32_to_cpup(p++); - clp->cl_exchange_flags = be32_to_cpup(p++); + res->seqid = be32_to_cpup(p++); + res->flags = be32_to_cpup(p++); - /* We ask for SP4_NONE */ - dummy = be32_to_cpup(p); - if (dummy != SP4_NONE) + res->state_protect.how = be32_to_cpup(p); + switch (res->state_protect.how) { + case SP4_NONE: + break; + case SP4_MACH_CRED: + status = decode_op_map(xdr, &res->state_protect.enforce); + if (status) + return status; + status = decode_op_map(xdr, &res->state_protect.allow); + if (status) + return status; + break; + default: + WARN_ON_ONCE(1); return -EIO; + } - /* Throw away minor_id */ + /* server_owner4.so_minor_id */ p = xdr_inline_decode(xdr, 8); if (unlikely(!p)) goto out_overflow; + p = xdr_decode_hyper(p, &res->server_owner->minor_id); - /* Throw away Major id */ + /* server_owner4.so_major_id */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; + if (unlikely(dummy > NFS4_OPAQUE_LIMIT)) + return -EIO; + memcpy(res->server_owner->major_id, dummy_str, dummy); + res->server_owner->major_id_sz = dummy; - /* Throw away server_scope */ + /* server_scope4 */ status = decode_opaque_inline(xdr, &dummy, &dummy_str); if (unlikely(status)) return status; + if (unlikely(dummy > NFS4_OPAQUE_LIMIT)) + return -EIO; + memcpy(res->server_scope->server_scope, dummy_str, dummy); + res->server_scope->server_scope_sz = dummy; - /* Throw away Implementation id array */ - status = decode_opaque_inline(xdr, &dummy, &dummy_str); - if (unlikely(status)) - return status; + /* Implementation Id */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + impl_id_count = be32_to_cpup(p++); + if (impl_id_count) { + /* nii_domain */ + status = decode_opaque_inline(xdr, &dummy, &dummy_str); + if (unlikely(status)) + return status; + if (unlikely(dummy > NFS4_OPAQUE_LIMIT)) + return -EIO; + memcpy(res->impl_id->domain, dummy_str, dummy); + + /* nii_name */ + status = decode_opaque_inline(xdr, &dummy, &dummy_str); + if (unlikely(status)) + return status; + if (unlikely(dummy > NFS4_OPAQUE_LIMIT)) + return -EIO; + memcpy(res->impl_id->name, dummy_str, dummy); + + /* nii_date */ + p = xdr_inline_decode(xdr, 12); + if (unlikely(!p)) + goto out_overflow; + p = xdr_decode_hyper(p, &res->impl_id->date.seconds); + res->impl_id->date.nseconds = be32_to_cpup(p); + + /* if there's more than one entry, ignore the rest */ + } return 0; out_overflow: print_overflow_msg(__func__, xdr); @@ -4814,12 +5581,14 @@ static int decode_chan_attrs(struct xdr_stream *xdr, struct nfs4_channel_attrs *attrs) { __be32 *p; - u32 nr_attrs; + u32 nr_attrs, val; p = xdr_inline_decode(xdr, 28); if (unlikely(!p)) goto out_overflow; - attrs->headerpadsz = be32_to_cpup(p++); + val = be32_to_cpup(p++); /* headerpadsz */ + if (val) + return -EINVAL; /* no support for header padding yet */ attrs->max_rqst_sz = be32_to_cpup(p++); attrs->max_resp_sz = be32_to_cpup(p++); attrs->max_resp_sz_cached = be32_to_cpup(p++); @@ -4827,8 +5596,8 @@ static int decode_chan_attrs(struct xdr_stream *xdr, attrs->max_reqs = be32_to_cpup(p++); nr_attrs = be32_to_cpup(p); if (unlikely(nr_attrs > 1)) { - printk(KERN_WARNING "%s: Invalid rdma channel attrs count %u\n", - __func__, nr_attrs); + printk(KERN_WARNING "NFS: %s: Invalid rdma channel attrs " + "count %u\n", __func__, nr_attrs); return -EINVAL; } if (nr_attrs == 1) { @@ -4847,6 +5616,37 @@ static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid) return decode_opaque_fixed(xdr, sid->data, NFS4_MAX_SESSIONID_LEN); } +static int decode_bind_conn_to_session(struct xdr_stream *xdr, + struct nfs41_bind_conn_to_session_res *res) +{ + __be32 *p; + int status; + + status = decode_op_hdr(xdr, OP_BIND_CONN_TO_SESSION); + if (!status) + status = decode_sessionid(xdr, &res->session->sess_id); + if (unlikely(status)) + return status; + + /* dir flags, rdma mode bool */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + goto out_overflow; + + res->dir = be32_to_cpup(p++); + if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH) + return -EIO; + if (be32_to_cpup(p) == 0) + res->use_conn_in_rdma_mode = false; + else + res->use_conn_in_rdma_mode = true; + + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + static int decode_create_session(struct xdr_stream *xdr, struct nfs41_create_session_res *res) { @@ -4883,6 +5683,11 @@ static int decode_destroy_session(struct xdr_stream *xdr, void *dummy) return decode_op_hdr(xdr, OP_DESTROY_SESSION); } +static int decode_destroy_clientid(struct xdr_stream *xdr, void *dummy) +{ + return decode_op_hdr(xdr, OP_DESTROY_CLIENTID); +} + static int decode_reclaim_complete(struct xdr_stream *xdr, void *dummy) { return decode_op_hdr(xdr, OP_RECLAIM_COMPLETE); @@ -4894,12 +5699,15 @@ static int decode_sequence(struct xdr_stream *xdr, struct rpc_rqst *rqstp) { #if defined(CONFIG_NFS_V4_1) + struct nfs4_session *session; struct nfs4_sessionid id; u32 dummy; int status; __be32 *p; - if (!res->sr_session) + if (res->sr_slot == NULL) + return 0; + if (!res->sr_slot->table->session) return 0; status = decode_op_hdr(xdr, OP_SEQUENCE); @@ -4913,8 +5721,9 @@ static int decode_sequence(struct xdr_stream *xdr, * sequence number, the server is looney tunes. */ status = -EREMOTEIO; + session = res->sr_slot->table->session; - if (memcmp(id.data, res->sr_session->sess_id.data, + if (memcmp(id.data, session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { dprintk("%s Invalid session id\n", __func__); goto out_err; @@ -4932,14 +5741,14 @@ static int decode_sequence(struct xdr_stream *xdr, } /* slot id */ dummy = be32_to_cpup(p++); - if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) { + if (dummy != res->sr_slot->slot_nr) { dprintk("%s Invalid slot id\n", __func__); goto out_err; } - /* highest slot id - currently not processed */ - dummy = be32_to_cpup(p++); - /* target highest slot id - currently not processed */ - dummy = be32_to_cpup(p++); + /* highest slot id */ + res->sr_highest_slotid = be32_to_cpup(p++); + /* target highest slot id */ + res->sr_target_highest_slotid = be32_to_cpup(p++); /* result flags */ res->sr_status_flags = be32_to_cpup(p); status = 0; @@ -4956,6 +5765,53 @@ out_overflow: } #if defined(CONFIG_NFS_V4_1) +/* + * TODO: Need to handle case when EOF != true; + */ +static int decode_getdevicelist(struct xdr_stream *xdr, + struct pnfs_devicelist *res) +{ + __be32 *p; + int status, i; + nfs4_verifier verftemp; + + status = decode_op_hdr(xdr, OP_GETDEVICELIST); + if (status) + return status; + + p = xdr_inline_decode(xdr, 8 + 8 + 4); + if (unlikely(!p)) + goto out_overflow; + + /* TODO: Skip cookie for now */ + p += 2; + + /* Read verifier */ + p = xdr_decode_opaque_fixed(p, verftemp.data, NFS4_VERIFIER_SIZE); + + res->num_devs = be32_to_cpup(p); + + dprintk("%s: num_dev %d\n", __func__, res->num_devs); + + if (res->num_devs > NFS4_PNFS_GETDEVLIST_MAXNUM) { + printk(KERN_ERR "NFS: %s too many result dev_num %u\n", + __func__, res->num_devs); + return -EIO; + } + + p = xdr_inline_decode(xdr, + res->num_devs * NFS4_DEVICEID4_SIZE + 4); + if (unlikely(!p)) + goto out_overflow; + for (i = 0; i < res->num_devs; i++) + p = xdr_decode_opaque_fixed(p, res->dev_id[i].data, + NFS4_DEVICEID4_SIZE); + res->eof = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} static int decode_getdeviceinfo(struct xdr_stream *xdr, struct pnfs_device *pdev) @@ -4992,7 +5848,8 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr, * and places the remaining xdr data in xdr_buf->tail */ pdev->mincount = be32_to_cpup(p); - xdr_read_pages(xdr, pdev->mincount); /* include space for the length */ + if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount) + goto out_overflow; /* Parse notification bitmap, verifying that it is zero. */ p = xdr_inline_decode(xdr, 4); @@ -5000,7 +5857,7 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr, goto out_overflow; len = be32_to_cpup(p); if (len) { - int i; + uint32_t i; p = xdr_inline_decode(xdr, 4 * len); if (unlikely(!p)) @@ -5025,15 +5882,19 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, __be32 *p; int status; u32 layout_count; + u32 recvd; status = decode_op_hdr(xdr, OP_LAYOUTGET); if (status) return status; - p = xdr_inline_decode(xdr, 8 + NFS4_STATEID_SIZE); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + res->return_on_close = be32_to_cpup(p); + decode_stateid(xdr, &res->stateid); + p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; - res->return_on_close = be32_to_cpup(p++); - p = xdr_decode_opaque_fixed(p, res->stateid.data, NFS4_STATEID_SIZE); layout_count = be32_to_cpup(p); if (!layout_count) { dprintk("%s: server responded with empty layout array\n", @@ -5041,17 +5902,14 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, return -EINVAL; } - p = xdr_inline_decode(xdr, 24); + p = xdr_inline_decode(xdr, 28); if (unlikely(!p)) goto out_overflow; p = xdr_decode_hyper(p, &res->range.offset); p = xdr_decode_hyper(p, &res->range.length); res->range.iomode = be32_to_cpup(p++); res->type = be32_to_cpup(p++); - - status = decode_opaque_inline(xdr, &res->layout.len, (char **)&p); - if (unlikely(status)) - return status; + res->layoutp->len = be32_to_cpup(p); dprintk("%s roff:%lu rlen:%lu riomode:%d, lo_type:0x%x, lo.len:%d\n", __func__, @@ -5059,12 +5917,15 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req, (unsigned long)res->range.length, res->range.iomode, res->type, - res->layout.len); + res->layoutp->len); - /* nfs4_proc_layoutget allocated a single page */ - if (res->layout.len > PAGE_SIZE) - return -ENOMEM; - memcpy(res->layout.buf, p, res->layout.len); + recvd = xdr_read_pages(xdr, res->layoutp->len); + if (res->layoutp->len > recvd) { + dprintk("NFS: server cheating in layoutget reply: " + "layout len %u > recvd %u\n", + res->layoutp->len, recvd); + return -EINVAL; + } if (layout_count > 1) { /* We only handle a length one array at the moment. Any @@ -5081,6 +5942,94 @@ out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } + +static int decode_layoutreturn(struct xdr_stream *xdr, + struct nfs4_layoutreturn_res *res) +{ + __be32 *p; + int status; + + status = decode_op_hdr(xdr, OP_LAYOUTRETURN); + if (status) + return status; + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + res->lrs_present = be32_to_cpup(p); + if (res->lrs_present) + status = decode_stateid(xdr, &res->stateid); + return status; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_layoutcommit(struct xdr_stream *xdr, + struct rpc_rqst *req, + struct nfs4_layoutcommit_res *res) +{ + __be32 *p; + __u32 sizechanged; + int status; + + status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT); + res->status = status; + if (status) + return status; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + sizechanged = be32_to_cpup(p); + + if (sizechanged) { + /* throw away new size */ + p = xdr_inline_decode(xdr, 8); + if (unlikely(!p)) + goto out_overflow; + } + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_test_stateid(struct xdr_stream *xdr, + struct nfs41_test_stateid_res *res) +{ + __be32 *p; + int status; + int num_res; + + status = decode_op_hdr(xdr, OP_TEST_STATEID); + if (status) + return status; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + num_res = be32_to_cpup(p++); + if (num_res != 1) + goto out; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + res->status = be32_to_cpup(p++); + + return status; +out_overflow: + print_overflow_msg(__func__, xdr); +out: + return -EIO; +} + +static int decode_free_stateid(struct xdr_stream *xdr, + struct nfs41_free_stateid_res *res) +{ + res->status = decode_op_hdr(xdr, OP_FREE_STATEID); + return res->status; +} #endif /* CONFIG_NFS_V4_1 */ /* @@ -5090,27 +6039,26 @@ out_overflow: /* * Decode OPEN_DOWNGRADE response */ -static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) +static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_closeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open_downgrade(&xdr, res); + status = decode_open_downgrade(xdr, res); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr(xdr, res->fattr, res->server); out: return status; } @@ -5118,27 +6066,25 @@ out: /* * Decode ACCESS response */ -static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res) +static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_accessres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status != 0) goto out; - status = decode_access(&xdr, res); + status = decode_access(xdr, &res->supported, &res->access); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr(xdr, res->fattr, res->server); out: return status; } @@ -5146,27 +6092,28 @@ out: /* * Decode LOOKUP response */ -static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) +static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_lookup_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_lookup(&xdr)) != 0) + status = decode_lookup(xdr); + if (status) goto out; - if ((status = decode_getfh(&xdr, res->fh)) != 0) + status = decode_getfh(xdr, res->fh); + if (status) goto out; - status = decode_getfattr(&xdr, res->fattr, res->server - ,!RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5174,24 +6121,26 @@ out: /* * Decode LOOKUP_ROOT response */ -static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) +static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_lookup_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putrootfh(&xdr)) != 0) + status = decode_putrootfh(xdr); + if (status) goto out; - if ((status = decode_getfh(&xdr, res->fh)) == 0) - status = decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_getfh(xdr, res->fh); + if (status == 0) + status = decode_getfattr_label(xdr, res->fattr, + res->label, res->server); out: return status; } @@ -5199,25 +6148,22 @@ out: /* * Decode REMOVE response */ -static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res) +static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_removeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) - goto out; - if ((status = decode_remove(&xdr, &res->cinfo)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->dir_attr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_remove(xdr, &res->cinfo); out: return status; } @@ -5225,35 +6171,28 @@ out: /* * Decode RENAME response */ -static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res) +static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_renameres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) - goto out; - if ((status = decode_savefh(&xdr)) != 0) - goto out; - if ((status = decode_putfh(&xdr)) != 0) - goto out; - if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - /* Current FH is target directory */ - if (decode_getfattr(&xdr, res->new_fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)) != 0) + status = decode_savefh(xdr); + if (status) goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->old_fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo); out: return status; } @@ -5261,38 +6200,38 @@ out: /* * Decode LINK response */ -static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res) +static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_link_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_savefh(&xdr)) != 0) + status = decode_savefh(xdr); + if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_link(&xdr, &res->cinfo)) != 0) + status = decode_link(xdr, &res->cinfo); + if (status) goto out; /* * Note order: OP_LINK leaves the directory as the current * filehandle. */ - if (decode_getfattr(&xdr, res->dir_attr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)) != 0) - goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_restorefh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5300,34 +6239,28 @@ out: /* * Decode CREATE response */ -static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) +static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_create_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) - goto out; - if ((status = decode_savefh(&xdr)) != 0) - goto out; - if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0) - goto out; - if ((status = decode_getfh(&xdr, res->fh)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if (decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)) != 0) + status = decode_create(xdr, &res->dir_cinfo); + if (status) goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_getfh(xdr, res->fh); + if (status) goto out; - decode_getfattr(&xdr, res->dir_fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5335,32 +6268,31 @@ out: /* * Decode SYMLINK response */ -static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) +static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_create_res *res) { - return nfs4_xdr_dec_create(rqstp, p, res); + return nfs4_xdr_dec_create(rqstp, xdr, res); } /* * Decode GETATTR response */ -static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res) +static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_getattr_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5368,46 +6300,40 @@ out: /* * Encode an SETACL request */ -static int -nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args) +static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_setaclargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - int status; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - status = encode_setacl(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_setacl(xdr, args, &hdr); encode_nops(&hdr); - return status; } /* * Decode SETACL response */ static int -nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, +nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr, struct nfs_setaclres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_setattr(&xdr); + status = decode_setattr(xdr); out: return status; } @@ -5416,24 +6342,26 @@ out: * Decode GETACL response */ static int -nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, +nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr, struct nfs_getaclres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + if (res->acl_scratch != NULL) { + void *p = page_address(res->acl_scratch); + xdr_set_scratch_buffer(xdr, p, PAGE_SIZE); + } + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_getacl(&xdr, rqstp, &res->acl_len); + status = decode_getacl(xdr, rqstp, res); out: return status; @@ -5442,23 +6370,22 @@ out: /* * Decode CLOSE response */ -static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) +static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_closeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_close(&xdr, res); + status = decode_close(xdr, res); if (status != 0) goto out; /* @@ -5467,8 +6394,7 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_clos * an ESTALE error. Shouldn't be a problem, * though, since fattr->valid will remain unset. */ - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr(xdr, res->fattr, res->server); out: return status; } @@ -5476,37 +6402,30 @@ out: /* * Decode OPEN response */ -static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) +static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_openres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_savefh(&xdr); + status = decode_open(xdr, res); if (status) goto out; - status = decode_open(&xdr, res); + status = decode_getfh(xdr, &res->fh); if (status) goto out; - if (decode_getfh(&xdr, &res->fh) != 0) - goto out; - if (decode_getfattr(&xdr, res->f_attr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)) != 0) - goto out; - if (decode_restorefh(&xdr) != 0) - goto out; - decode_getfattr(&xdr, res->dir_attr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + if (res->access_request) + decode_access(xdr, &res->access_supported, &res->access_result); + decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server); out: return status; } @@ -5514,20 +6433,20 @@ out: /* * Decode OPEN_CONFIRM response */ -static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res) +static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_open_confirmres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open_confirm(&xdr, res); + status = decode_open_confirm(xdr, res); out: return status; } @@ -5535,27 +6454,28 @@ out: /* * Decode OPEN response */ -static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) +static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_openres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open(&xdr, res); + status = decode_open(xdr, res); if (status) goto out; - decode_getfattr(&xdr, res->f_attr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + if (res->access_request) + decode_access(xdr, &res->access_supported, &res->access_result); + decode_getfattr(xdr, res->f_attr, res->server); out: return status; } @@ -5563,27 +6483,26 @@ out: /* * Decode SETATTR response */ -static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res) +static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_setattrres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_setattr(&xdr); + status = decode_setattr(xdr); if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5591,23 +6510,22 @@ out: /* * Decode LOCK response */ -static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res) +static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_lock_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_lock(&xdr, res); + status = decode_lock(xdr, res); out: return status; } @@ -5615,23 +6533,22 @@ out: /* * Decode LOCKT response */ -static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res) +static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_lockt_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_lockt(&xdr, res); + status = decode_lockt(xdr, res); out: return status; } @@ -5639,61 +6556,58 @@ out: /* * Decode LOCKU response */ -static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res) +static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_locku_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_locku(&xdr, res); + status = decode_locku(xdr, res); out: return status; } -static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy) +static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, void *dummy) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_release_lockowner(&xdr); + status = decode_release_lockowner(xdr); return status; } /* * Decode READLINK response */ -static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, +static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_readlink_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_readlink(&xdr, rqstp); + status = decode_readlink(xdr, rqstp); out: return status; } @@ -5701,23 +6615,22 @@ out: /* * Decode READDIR response */ -static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res) +static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_readdir_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_readdir(&xdr, rqstp, res); + status = decode_readdir(xdr, rqstp, res); out: return status; } @@ -5725,23 +6638,22 @@ out: /* * Decode Read response */ -static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res) +static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_pgio_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_read(&xdr, rqstp, res); + status = decode_read(xdr, rqstp, res); if (!status) status = res->count; out: @@ -5751,27 +6663,26 @@ out: /* * Decode WRITE response */ -static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) +static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_pgio_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_write(&xdr, res); + status = decode_write(xdr, res); if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + if (res->fattr) + decode_getfattr(xdr, res->fattr, res->server); if (!status) status = res->count; out: @@ -5781,27 +6692,22 @@ out: /* * Decode COMMIT response */ -static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) +static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_commitres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_commit(&xdr, res); - if (status) - goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_commit(xdr, res); out: return status; } @@ -5809,85 +6715,80 @@ out: /* * Decode FSINFO response */ -static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_fsinfo_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_fsinfo(&xdr, res->fsinfo); + status = decode_fsinfo(xdr, res->fsinfo); return status; } /* * Decode PATHCONF response */ -static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_pathconf_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_pathconf(&xdr, res->pathconf); + status = decode_pathconf(xdr, res->pathconf); return status; } /* * Decode STATFS response */ -static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_statfs_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_statfs(&xdr, res->fsstat); + status = decode_statfs(xdr, res->fsstat); return status; } /* * Decode GETATTR_BITMAP response */ -static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res) +static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_server_caps_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - status = decode_server_caps(&xdr, res); + status = decode_server_caps(xdr, res); out: return status; } @@ -5895,80 +6796,72 @@ out: /* * Decode RENEW response */ -static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy) +static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *__unused) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_renew(&xdr); + status = decode_renew(xdr); return status; } /* * Decode SETCLIENTID response */ -static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p, - struct nfs4_setclientid_res *res) +static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_setclientid(&xdr, res); + status = decode_setclientid(xdr, res); return status; } /* * Decode SETCLIENTID_CONFIRM response */ -static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo) +static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); - if (!status) - status = decode_setclientid_confirm(&xdr); - if (!status) - status = decode_putrootfh(&xdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_fsinfo(&xdr, fsinfo); + status = decode_setclientid_confirm(xdr); return status; } /* * Decode DELEGRETURN response */ -static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res) +static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_delegreturnres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status != 0) goto out; - status = decode_delegreturn(&xdr); + status = decode_getfattr(xdr, res->fattr, res->server); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, - !RPC_IS_ASYNC(rqstp->rq_task)); + status = decode_delegreturn(xdr); out: return status; } @@ -5976,159 +6869,276 @@ out: /* * Decode FS_LOCATIONS response */ -static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, struct nfs4_fs_locations_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_lookup(&xdr)) != 0) + if (res->migration) { + xdr_enter_page(xdr, PAGE_SIZE); + status = decode_getfattr_generic(xdr, + &res->fs_locations->fattr, + NULL, res->fs_locations, + NULL, res->fs_locations->server); + if (status) + goto out; + if (res->renew) + status = decode_renew(xdr); + } else { + status = decode_lookup(xdr); + if (status) + goto out; + xdr_enter_page(xdr, PAGE_SIZE); + status = decode_getfattr_generic(xdr, + &res->fs_locations->fattr, + NULL, res->fs_locations, + NULL, res->fs_locations->server); + } +out: + return status; +} + +/* + * Decode SECINFO response + */ +static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_secinfo_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) goto out; - xdr_enter_page(&xdr, PAGE_SIZE); - status = decode_getfattr(&xdr, &res->fs_locations->fattr, - res->fs_locations->server, - !RPC_IS_ASYNC(req->rq_task)); + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_secinfo(xdr, res); +out: + return status; +} + +/* + * Decode FSID_PRESENT response + */ +static int nfs4_xdr_dec_fsid_present(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_fsid_present_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_getfh(xdr, res->fh); + if (status) + goto out; + if (res->renew) + status = decode_renew(xdr); out: return status; } #if defined(CONFIG_NFS_V4_1) /* + * Decode BIND_CONN_TO_SESSION response + */ +static int nfs4_xdr_dec_bind_conn_to_session(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (!status) + status = decode_bind_conn_to_session(xdr, res); + return status; +} + +/* * Decode EXCHANGE_ID response */ -static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, void *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_exchange_id(&xdr, res); + status = decode_exchange_id(xdr, res); return status; } /* * Decode CREATE_SESSION response */ -static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs41_create_session_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_create_session(&xdr, res); + status = decode_create_session(xdr, res); return status; } /* * Decode DESTROY_SESSION response */ -static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p, - void *dummy) +static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (!status) + status = decode_destroy_session(xdr, res); + return status; +} + +/* + * Decode DESTROY_CLIENTID response + */ +static int nfs4_xdr_dec_destroy_clientid(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_destroy_session(&xdr, dummy); + status = decode_destroy_clientid(xdr, res); return status; } /* * Decode SEQUENCE response */ -static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_sequence_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, res, rqstp); + status = decode_sequence(xdr, res, rqstp); return status; } /* * Decode GET_LEASE_TIME response */ -static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_get_lease_time_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->lr_seq_res, rqstp); + status = decode_sequence(xdr, &res->lr_seq_res, rqstp); if (!status) - status = decode_putrootfh(&xdr); + status = decode_putrootfh(xdr); if (!status) - status = decode_fsinfo(&xdr, res->lr_fsinfo); + status = decode_fsinfo(xdr, res->lr_fsinfo); return status; } /* * Decode RECLAIM_COMPLETE response */ -static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs41_reclaim_complete_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (!status) - status = decode_reclaim_complete(&xdr, (void *)NULL); + status = decode_reclaim_complete(xdr, (void *)NULL); + return status; +} + +/* + * Decode GETDEVICELIST response + */ +static int nfs4_xdr_dec_getdevicelist(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_getdevicelist_res *res) +{ + struct compound_hdr hdr; + int status; + + dprintk("encoding getdevicelist!\n"); + + status = decode_compound_hdr(xdr, &hdr); + if (status != 0) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status != 0) + goto out; + status = decode_putfh(xdr); + if (status != 0) + goto out; + status = decode_getdevicelist(xdr, res->devlist); +out: return status; } /* * Decode GETDEVINFO response */ -static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_getdeviceinfo_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status != 0) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status != 0) goto out; - status = decode_getdeviceinfo(&xdr, res->pdev); + status = decode_getdeviceinfo(xdr, res->pdev); out: return status; } @@ -6136,45 +7146,176 @@ out: /* * Decode LAYOUTGET response */ -static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_layoutget_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_layoutget(&xdr, rqstp, res); + status = decode_layoutget(xdr, rqstp, res); +out: + return status; +} + +/* + * Decode LAYOUTRETURN response + */ +static int nfs4_xdr_dec_layoutreturn(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_layoutreturn_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_layoutreturn(xdr, res); +out: + return status; +} + +/* + * Decode LAYOUTCOMMIT response + */ +static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_layoutcommit_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putfh(xdr); + if (status) + goto out; + status = decode_layoutcommit(xdr, rqstp, res); + if (status) + goto out; + decode_getfattr(xdr, res->fattr, res->server); +out: + return status; +} + +/* + * Decode SECINFO_NO_NAME response + */ +static int nfs4_xdr_dec_secinfo_no_name(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_secinfo_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_putrootfh(xdr); + if (status) + goto out; + status = decode_secinfo_no_name(xdr, res); +out: + return status; +} + +/* + * Decode TEST_STATEID response + */ +static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs41_test_stateid_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_test_stateid(xdr, res); +out: + return status; +} + +/* + * Decode FREE_STATEID response + */ +static int nfs4_xdr_dec_free_stateid(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs41_free_stateid_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_free_stateid(xdr, res); out: return status; } #endif /* CONFIG_NFS_V4_1 */ -__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, - struct nfs_server *server, int plus) +/** + * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in + * the local page cache. + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + */ +int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) { - uint32_t bitmap[2] = {0}; + unsigned int savep; + uint32_t bitmap[3] = {0}; uint32_t len; __be32 *p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; - if (!ntohl(*p++)) { + if (*p == xdr_zero) { p = xdr_inline_decode(xdr, 4); if (unlikely(!p)) goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); + if (*p == xdr_zero) + return -EAGAIN; entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); + return -EBADCOOKIE; } p = xdr_inline_decode(xdr, 12); @@ -6182,7 +7323,7 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, goto out_overflow; entry->prev_cookie = entry->cookie; p = xdr_decode_hyper(p, &entry->cookie); - entry->len = ntohl(*p++); + entry->len = be32_to_cpup(p); p = xdr_inline_decode(xdr, entry->len); if (unlikely(!p)) @@ -6200,28 +7341,26 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (decode_attr_bitmap(xdr, bitmap) < 0) goto out_overflow; - if (decode_attr_length(xdr, &len, &p) < 0) + if (decode_attr_length(xdr, &len, &savep) < 0) goto out_overflow; - if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0) + if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, + NULL, entry->label, entry->server) < 0) goto out_overflow; - if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID) + if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) + entry->ino = entry->fattr->mounted_on_fileid; + else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID) entry->ino = entry->fattr->fileid; - if (verify_attr_len(xdr, p, len) < 0) - goto out_overflow; - - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; + entry->d_type = DT_UNKNOWN; + if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); - return p; + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EAGAIN; } /* @@ -6252,8 +7391,6 @@ static struct { { NFS4ERR_DQUOT, -EDQUOT }, { NFS4ERR_STALE, -ESTALE }, { NFS4ERR_BADHANDLE, -EBADHANDLE }, - { NFS4ERR_BADOWNER, -EINVAL }, - { NFS4ERR_BADNAME, -EINVAL }, { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, { NFS4ERR_NOTSUPP, -ENOTSUPP }, { NFS4ERR_TOOSMALL, -ETOOSMALL }, @@ -6263,10 +7400,6 @@ static struct { { NFS4ERR_SYMLINK, -ELOOP }, { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, { NFS4ERR_DEADLOCK, -EDEADLK }, - { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs - * to be handled by a - * middle-layer. - */ { -1, -EIO } }; @@ -6297,8 +7430,8 @@ nfs4_stat_to_errno(int stat) #define PROC(proc, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_COMPOUND, \ - .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ + .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \ + .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \ .p_arglen = NFS4_##argtype##_sz, \ .p_replen = NFS4_##restype##_sz, \ .p_statidx = NFSPROC4_CLNT_##proc, \ @@ -6306,54 +7439,65 @@ nfs4_stat_to_errno(int stat) } struct rpc_procinfo nfs4_procedures[] = { - PROC(READ, enc_read, dec_read), - PROC(WRITE, enc_write, dec_write), - PROC(COMMIT, enc_commit, dec_commit), - PROC(OPEN, enc_open, dec_open), - PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), - PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), - PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), - PROC(CLOSE, enc_close, dec_close), - PROC(SETATTR, enc_setattr, dec_setattr), - PROC(FSINFO, enc_fsinfo, dec_fsinfo), - PROC(RENEW, enc_renew, dec_renew), - PROC(SETCLIENTID, enc_setclientid, dec_setclientid), - PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), - PROC(LOCK, enc_lock, dec_lock), - PROC(LOCKT, enc_lockt, dec_lockt), - PROC(LOCKU, enc_locku, dec_locku), - PROC(ACCESS, enc_access, dec_access), - PROC(GETATTR, enc_getattr, dec_getattr), - PROC(LOOKUP, enc_lookup, dec_lookup), - PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), - PROC(REMOVE, enc_remove, dec_remove), - PROC(RENAME, enc_rename, dec_rename), - PROC(LINK, enc_link, dec_link), - PROC(SYMLINK, enc_symlink, dec_symlink), - PROC(CREATE, enc_create, dec_create), - PROC(PATHCONF, enc_pathconf, dec_pathconf), - PROC(STATFS, enc_statfs, dec_statfs), - PROC(READLINK, enc_readlink, dec_readlink), - PROC(READDIR, enc_readdir, dec_readdir), - PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), - PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), - PROC(GETACL, enc_getacl, dec_getacl), - PROC(SETACL, enc_setacl, dec_setacl), - PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), - PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner), + PROC(READ, enc_read, dec_read), + PROC(WRITE, enc_write, dec_write), + PROC(COMMIT, enc_commit, dec_commit), + PROC(OPEN, enc_open, dec_open), + PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), + PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), + PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), + PROC(CLOSE, enc_close, dec_close), + PROC(SETATTR, enc_setattr, dec_setattr), + PROC(FSINFO, enc_fsinfo, dec_fsinfo), + PROC(RENEW, enc_renew, dec_renew), + PROC(SETCLIENTID, enc_setclientid, dec_setclientid), + PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), + PROC(LOCK, enc_lock, dec_lock), + PROC(LOCKT, enc_lockt, dec_lockt), + PROC(LOCKU, enc_locku, dec_locku), + PROC(ACCESS, enc_access, dec_access), + PROC(GETATTR, enc_getattr, dec_getattr), + PROC(LOOKUP, enc_lookup, dec_lookup), + PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), + PROC(REMOVE, enc_remove, dec_remove), + PROC(RENAME, enc_rename, dec_rename), + PROC(LINK, enc_link, dec_link), + PROC(SYMLINK, enc_symlink, dec_symlink), + PROC(CREATE, enc_create, dec_create), + PROC(PATHCONF, enc_pathconf, dec_pathconf), + PROC(STATFS, enc_statfs, dec_statfs), + PROC(READLINK, enc_readlink, dec_readlink), + PROC(READDIR, enc_readdir, dec_readdir), + PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), + PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), + PROC(GETACL, enc_getacl, dec_getacl), + PROC(SETACL, enc_setacl, dec_setacl), + PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), + PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner), + PROC(SECINFO, enc_secinfo, dec_secinfo), + PROC(FSID_PRESENT, enc_fsid_present, dec_fsid_present), #if defined(CONFIG_NFS_V4_1) - PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), - PROC(CREATE_SESSION, enc_create_session, dec_create_session), - PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), - PROC(SEQUENCE, enc_sequence, dec_sequence), - PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), - PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete), - PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), - PROC(LAYOUTGET, enc_layoutget, dec_layoutget), + PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), + PROC(CREATE_SESSION, enc_create_session, dec_create_session), + PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), + PROC(SEQUENCE, enc_sequence, dec_sequence), + PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), + PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete), + PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), + PROC(LAYOUTGET, enc_layoutget, dec_layoutget), + PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit), + PROC(LAYOUTRETURN, enc_layoutreturn, dec_layoutreturn), + PROC(SECINFO_NO_NAME, enc_secinfo_no_name, dec_secinfo_no_name), + PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid), + PROC(FREE_STATEID, enc_free_stateid, dec_free_stateid), + PROC(GETDEVICELIST, enc_getdevicelist, dec_getdevicelist), + PROC(BIND_CONN_TO_SESSION, + enc_bind_conn_to_session, dec_bind_conn_to_session), + PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid), #endif /* CONFIG_NFS_V4_1 */ }; -struct rpc_version nfs_version4 = { +const struct rpc_version nfs_version4 = { .number = 4, .nrprocs = ARRAY_SIZE(nfs4_procedures), .procs = nfs4_procedures diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c index 903908a2002..cd3c910d2d1 100644 --- a/fs/nfs/nfsroot.c +++ b/fs/nfs/nfsroot.c @@ -86,11 +86,14 @@ /* Default path we try to mount. "%s" gets replaced by our IP address */ #define NFS_ROOT "/tftpboot/%s" +/* Default NFSROOT mount options. */ +#define NFS_DEF_OPTIONS "vers=2,udp,rsize=4096,wsize=4096" + /* Parameters passed from the kernel command line */ static char nfs_root_parms[256] __initdata = ""; /* Text-based mount options passed to super.c */ -static char nfs_root_options[256] __initdata = ""; +static char nfs_root_options[256] __initdata = NFS_DEF_OPTIONS; /* Address of NFS server */ static __be32 servaddr __initdata = htonl(INADDR_NONE); @@ -101,7 +104,7 @@ static char nfs_export_path[NFS_MAXPATHLEN + 1] __initdata = ""; /* server:export path string passed to super.c */ static char nfs_root_device[NFS_MAXPATHLEN + 1] __initdata = ""; -#ifdef RPC_DEBUG +#ifdef NFS_DEBUG /* * When the "nfsrootdebug" kernel command line option is specified, * enable debugging messages for NFSROOT. @@ -160,8 +163,14 @@ static int __init root_nfs_copy(char *dest, const char *src, } static int __init root_nfs_cat(char *dest, const char *src, - const size_t destlen) + const size_t destlen) { + size_t len = strlen(dest); + + if (len && dest[len - 1] != ',') + if (strlcat(dest, ",", destlen) > destlen) + return -1; + if (strlcat(dest, src, destlen) > destlen) return -1; return 0; @@ -194,16 +203,6 @@ static int __init root_nfs_parse_options(char *incoming, char *exppath, if (root_nfs_cat(nfs_root_options, incoming, sizeof(nfs_root_options))) return -1; - - /* - * Possibly prepare for more options to be appended - */ - if (nfs_root_options[0] != '\0' && - nfs_root_options[strlen(nfs_root_options)] != ',') - if (root_nfs_cat(nfs_root_options, ",", - sizeof(nfs_root_options))) - return -1; - return 0; } @@ -217,7 +216,7 @@ static int __init root_nfs_parse_options(char *incoming, char *exppath, */ static int __init root_nfs_data(char *cmdline) { - char addr_option[sizeof("nolock,addr=") + INET_ADDRSTRLEN + 1]; + char mand_options[sizeof("nolock,addr=") + INET_ADDRSTRLEN + 1]; int len, retval = -1; char *tmp = NULL; const size_t tmplen = sizeof(nfs_export_path); @@ -244,9 +243,9 @@ static int __init root_nfs_data(char *cmdline) * Append mandatory options for nfsroot so they override * what has come before */ - snprintf(addr_option, sizeof(addr_option), "nolock,addr=%pI4", + snprintf(mand_options, sizeof(mand_options), "nolock,addr=%pI4", &servaddr); - if (root_nfs_cat(nfs_root_options, addr_option, + if (root_nfs_cat(nfs_root_options, mand_options, sizeof(nfs_root_options))) goto out_optionstoolong; diff --git a/fs/nfs/nfstrace.c b/fs/nfs/nfstrace.c new file mode 100644 index 00000000000..4eb0aead69b --- /dev/null +++ b/fs/nfs/nfstrace.c @@ -0,0 +1,9 @@ +/* + * Copyright (c) 2013 Trond Myklebust <Trond.Myklebust@netapp.com> + */ +#include <linux/nfs_fs.h> +#include <linux/namei.h> +#include "internal.h" + +#define CREATE_TRACE_POINTS +#include "nfstrace.h" diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h new file mode 100644 index 00000000000..59f838cdc00 --- /dev/null +++ b/fs/nfs/nfstrace.h @@ -0,0 +1,730 @@ +/* + * Copyright (c) 2013 Trond Myklebust <Trond.Myklebust@netapp.com> + */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM nfs + +#if !defined(_TRACE_NFS_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_NFS_H + +#include <linux/tracepoint.h> + +#define nfs_show_file_type(ftype) \ + __print_symbolic(ftype, \ + { DT_UNKNOWN, "UNKNOWN" }, \ + { DT_FIFO, "FIFO" }, \ + { DT_CHR, "CHR" }, \ + { DT_DIR, "DIR" }, \ + { DT_BLK, "BLK" }, \ + { DT_REG, "REG" }, \ + { DT_LNK, "LNK" }, \ + { DT_SOCK, "SOCK" }, \ + { DT_WHT, "WHT" }) + +#define nfs_show_cache_validity(v) \ + __print_flags(v, "|", \ + { NFS_INO_INVALID_ATTR, "INVALID_ATTR" }, \ + { NFS_INO_INVALID_DATA, "INVALID_DATA" }, \ + { NFS_INO_INVALID_ATIME, "INVALID_ATIME" }, \ + { NFS_INO_INVALID_ACCESS, "INVALID_ACCESS" }, \ + { NFS_INO_INVALID_ACL, "INVALID_ACL" }, \ + { NFS_INO_REVAL_PAGECACHE, "REVAL_PAGECACHE" }, \ + { NFS_INO_REVAL_FORCED, "REVAL_FORCED" }, \ + { NFS_INO_INVALID_LABEL, "INVALID_LABEL" }) + +#define nfs_show_nfsi_flags(v) \ + __print_flags(v, "|", \ + { 1 << NFS_INO_ADVISE_RDPLUS, "ADVISE_RDPLUS" }, \ + { 1 << NFS_INO_STALE, "STALE" }, \ + { 1 << NFS_INO_INVALIDATING, "INVALIDATING" }, \ + { 1 << NFS_INO_FLUSHING, "FLUSHING" }, \ + { 1 << NFS_INO_FSCACHE, "FSCACHE" }, \ + { 1 << NFS_INO_COMMIT, "COMMIT" }, \ + { 1 << NFS_INO_LAYOUTCOMMIT, "NEED_LAYOUTCOMMIT" }, \ + { 1 << NFS_INO_LAYOUTCOMMITTING, "LAYOUTCOMMIT" }) + +DECLARE_EVENT_CLASS(nfs_inode_event, + TP_PROTO( + const struct inode *inode + ), + + TP_ARGS(inode), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u32, fhandle) + __field(u64, fileid) + __field(u64, version) + ), + + TP_fast_assign( + const struct nfs_inode *nfsi = NFS_I(inode); + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->version = inode->i_version; + ), + + TP_printk( + "fileid=%02x:%02x:%llu fhandle=0x%08x version=%llu ", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + (unsigned long long)__entry->version + ) +); + +DECLARE_EVENT_CLASS(nfs_inode_event_done, + TP_PROTO( + const struct inode *inode, + int error + ), + + TP_ARGS(inode, error), + + TP_STRUCT__entry( + __field(int, error) + __field(dev_t, dev) + __field(u32, fhandle) + __field(unsigned char, type) + __field(u64, fileid) + __field(u64, version) + __field(loff_t, size) + __field(unsigned long, nfsi_flags) + __field(unsigned long, cache_validity) + ), + + TP_fast_assign( + const struct nfs_inode *nfsi = NFS_I(inode); + __entry->error = error; + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = nfsi->fileid; + __entry->fhandle = nfs_fhandle_hash(&nfsi->fh); + __entry->type = nfs_umode_to_dtype(inode->i_mode); + __entry->version = inode->i_version; + __entry->size = i_size_read(inode); + __entry->nfsi_flags = nfsi->flags; + __entry->cache_validity = nfsi->cache_validity; + ), + + TP_printk( + "error=%d fileid=%02x:%02x:%llu fhandle=0x%08x " + "type=%u (%s) version=%llu size=%lld " + "cache_validity=%lu (%s) nfs_flags=%ld (%s)", + __entry->error, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->fileid, + __entry->fhandle, + __entry->type, + nfs_show_file_type(__entry->type), + (unsigned long long)__entry->version, + (long long)__entry->size, + __entry->cache_validity, + nfs_show_cache_validity(__entry->cache_validity), + __entry->nfsi_flags, + nfs_show_nfsi_flags(__entry->nfsi_flags) + ) +); + +#define DEFINE_NFS_INODE_EVENT(name) \ + DEFINE_EVENT(nfs_inode_event, name, \ + TP_PROTO( \ + const struct inode *inode \ + ), \ + TP_ARGS(inode)) +#define DEFINE_NFS_INODE_EVENT_DONE(name) \ + DEFINE_EVENT(nfs_inode_event_done, name, \ + TP_PROTO( \ + const struct inode *inode, \ + int error \ + ), \ + TP_ARGS(inode, error)) +DEFINE_NFS_INODE_EVENT(nfs_refresh_inode_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_refresh_inode_exit); +DEFINE_NFS_INODE_EVENT(nfs_revalidate_inode_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_revalidate_inode_exit); +DEFINE_NFS_INODE_EVENT(nfs_invalidate_mapping_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_invalidate_mapping_exit); +DEFINE_NFS_INODE_EVENT(nfs_getattr_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_getattr_exit); +DEFINE_NFS_INODE_EVENT(nfs_setattr_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_setattr_exit); +DEFINE_NFS_INODE_EVENT(nfs_writeback_page_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_writeback_page_exit); +DEFINE_NFS_INODE_EVENT(nfs_writeback_inode_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_writeback_inode_exit); +DEFINE_NFS_INODE_EVENT(nfs_fsync_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_fsync_exit); +DEFINE_NFS_INODE_EVENT(nfs_access_enter); +DEFINE_NFS_INODE_EVENT_DONE(nfs_access_exit); + +#define show_lookup_flags(flags) \ + __print_flags((unsigned long)flags, "|", \ + { LOOKUP_AUTOMOUNT, "AUTOMOUNT" }, \ + { LOOKUP_DIRECTORY, "DIRECTORY" }, \ + { LOOKUP_OPEN, "OPEN" }, \ + { LOOKUP_CREATE, "CREATE" }, \ + { LOOKUP_EXCL, "EXCL" }) + +DECLARE_EVENT_CLASS(nfs_lookup_event, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry, + unsigned int flags + ), + + TP_ARGS(dir, dentry, flags), + + TP_STRUCT__entry( + __field(unsigned int, flags) + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->flags = flags; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "flags=%u (%s) name=%02x:%02x:%llu/%s", + __entry->flags, + show_lookup_flags(__entry->flags), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS_LOOKUP_EVENT(name) \ + DEFINE_EVENT(nfs_lookup_event, name, \ + TP_PROTO( \ + const struct inode *dir, \ + const struct dentry *dentry, \ + unsigned int flags \ + ), \ + TP_ARGS(dir, dentry, flags)) + +DECLARE_EVENT_CLASS(nfs_lookup_event_done, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry, + unsigned int flags, + int error + ), + + TP_ARGS(dir, dentry, flags, error), + + TP_STRUCT__entry( + __field(int, error) + __field(unsigned int, flags) + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->error = error; + __entry->flags = flags; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "error=%d flags=%u (%s) name=%02x:%02x:%llu/%s", + __entry->error, + __entry->flags, + show_lookup_flags(__entry->flags), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS_LOOKUP_EVENT_DONE(name) \ + DEFINE_EVENT(nfs_lookup_event_done, name, \ + TP_PROTO( \ + const struct inode *dir, \ + const struct dentry *dentry, \ + unsigned int flags, \ + int error \ + ), \ + TP_ARGS(dir, dentry, flags, error)) + +DEFINE_NFS_LOOKUP_EVENT(nfs_lookup_enter); +DEFINE_NFS_LOOKUP_EVENT_DONE(nfs_lookup_exit); +DEFINE_NFS_LOOKUP_EVENT(nfs_lookup_revalidate_enter); +DEFINE_NFS_LOOKUP_EVENT_DONE(nfs_lookup_revalidate_exit); + +#define show_open_flags(flags) \ + __print_flags((unsigned long)flags, "|", \ + { O_CREAT, "O_CREAT" }, \ + { O_EXCL, "O_EXCL" }, \ + { O_TRUNC, "O_TRUNC" }, \ + { O_APPEND, "O_APPEND" }, \ + { O_DSYNC, "O_DSYNC" }, \ + { O_DIRECT, "O_DIRECT" }, \ + { O_DIRECTORY, "O_DIRECTORY" }) + +#define show_fmode_flags(mode) \ + __print_flags(mode, "|", \ + { ((__force unsigned long)FMODE_READ), "READ" }, \ + { ((__force unsigned long)FMODE_WRITE), "WRITE" }, \ + { ((__force unsigned long)FMODE_EXEC), "EXEC" }) + +TRACE_EVENT(nfs_atomic_open_enter, + TP_PROTO( + const struct inode *dir, + const struct nfs_open_context *ctx, + unsigned int flags + ), + + TP_ARGS(dir, ctx, flags), + + TP_STRUCT__entry( + __field(unsigned int, flags) + __field(unsigned int, fmode) + __field(dev_t, dev) + __field(u64, dir) + __string(name, ctx->dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->flags = flags; + __entry->fmode = (__force unsigned int)ctx->mode; + __assign_str(name, ctx->dentry->d_name.name); + ), + + TP_printk( + "flags=%u (%s) fmode=%s name=%02x:%02x:%llu/%s", + __entry->flags, + show_open_flags(__entry->flags), + show_fmode_flags(__entry->fmode), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +TRACE_EVENT(nfs_atomic_open_exit, + TP_PROTO( + const struct inode *dir, + const struct nfs_open_context *ctx, + unsigned int flags, + int error + ), + + TP_ARGS(dir, ctx, flags, error), + + TP_STRUCT__entry( + __field(int, error) + __field(unsigned int, flags) + __field(unsigned int, fmode) + __field(dev_t, dev) + __field(u64, dir) + __string(name, ctx->dentry->d_name.name) + ), + + TP_fast_assign( + __entry->error = error; + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->flags = flags; + __entry->fmode = (__force unsigned int)ctx->mode; + __assign_str(name, ctx->dentry->d_name.name); + ), + + TP_printk( + "error=%d flags=%u (%s) fmode=%s " + "name=%02x:%02x:%llu/%s", + __entry->error, + __entry->flags, + show_open_flags(__entry->flags), + show_fmode_flags(__entry->fmode), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +TRACE_EVENT(nfs_create_enter, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry, + unsigned int flags + ), + + TP_ARGS(dir, dentry, flags), + + TP_STRUCT__entry( + __field(unsigned int, flags) + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->flags = flags; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "flags=%u (%s) name=%02x:%02x:%llu/%s", + __entry->flags, + show_open_flags(__entry->flags), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +TRACE_EVENT(nfs_create_exit, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry, + unsigned int flags, + int error + ), + + TP_ARGS(dir, dentry, flags, error), + + TP_STRUCT__entry( + __field(int, error) + __field(unsigned int, flags) + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->error = error; + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->flags = flags; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "error=%d flags=%u (%s) name=%02x:%02x:%llu/%s", + __entry->error, + __entry->flags, + show_open_flags(__entry->flags), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +DECLARE_EVENT_CLASS(nfs_directory_event, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry + ), + + TP_ARGS(dir, dentry), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "name=%02x:%02x:%llu/%s", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS_DIRECTORY_EVENT(name) \ + DEFINE_EVENT(nfs_directory_event, name, \ + TP_PROTO( \ + const struct inode *dir, \ + const struct dentry *dentry \ + ), \ + TP_ARGS(dir, dentry)) + +DECLARE_EVENT_CLASS(nfs_directory_event_done, + TP_PROTO( + const struct inode *dir, + const struct dentry *dentry, + int error + ), + + TP_ARGS(dir, dentry, error), + + TP_STRUCT__entry( + __field(int, error) + __field(dev_t, dev) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->error = error; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "error=%d name=%02x:%02x:%llu/%s", + __entry->error, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +#define DEFINE_NFS_DIRECTORY_EVENT_DONE(name) \ + DEFINE_EVENT(nfs_directory_event_done, name, \ + TP_PROTO( \ + const struct inode *dir, \ + const struct dentry *dentry, \ + int error \ + ), \ + TP_ARGS(dir, dentry, error)) + +DEFINE_NFS_DIRECTORY_EVENT(nfs_mknod_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_mknod_exit); +DEFINE_NFS_DIRECTORY_EVENT(nfs_mkdir_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_mkdir_exit); +DEFINE_NFS_DIRECTORY_EVENT(nfs_rmdir_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_rmdir_exit); +DEFINE_NFS_DIRECTORY_EVENT(nfs_remove_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_remove_exit); +DEFINE_NFS_DIRECTORY_EVENT(nfs_unlink_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_unlink_exit); +DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter); +DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_symlink_exit); + +TRACE_EVENT(nfs_link_enter, + TP_PROTO( + const struct inode *inode, + const struct inode *dir, + const struct dentry *dentry + ), + + TP_ARGS(inode, dir, dentry), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u64, fileid) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->dir = NFS_FILEID(dir); + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->fileid, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +TRACE_EVENT(nfs_link_exit, + TP_PROTO( + const struct inode *inode, + const struct inode *dir, + const struct dentry *dentry, + int error + ), + + TP_ARGS(inode, dir, dentry, error), + + TP_STRUCT__entry( + __field(int, error) + __field(dev_t, dev) + __field(u64, fileid) + __field(u64, dir) + __string(name, dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->fileid = NFS_FILEID(inode); + __entry->dir = NFS_FILEID(dir); + __entry->error = error; + __assign_str(name, dentry->d_name.name); + ), + + TP_printk( + "error=%d fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s", + __entry->error, + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->fileid, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); + +DECLARE_EVENT_CLASS(nfs_rename_event, + TP_PROTO( + const struct inode *old_dir, + const struct dentry *old_dentry, + const struct inode *new_dir, + const struct dentry *new_dentry + ), + + TP_ARGS(old_dir, old_dentry, new_dir, new_dentry), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(u64, old_dir) + __field(u64, new_dir) + __string(old_name, old_dentry->d_name.name) + __string(new_name, new_dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = old_dir->i_sb->s_dev; + __entry->old_dir = NFS_FILEID(old_dir); + __entry->new_dir = NFS_FILEID(new_dir); + __assign_str(old_name, old_dentry->d_name.name); + __assign_str(new_name, new_dentry->d_name.name); + ), + + TP_printk( + "old_name=%02x:%02x:%llu/%s new_name=%02x:%02x:%llu/%s", + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->old_dir, + __get_str(old_name), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->new_dir, + __get_str(new_name) + ) +); +#define DEFINE_NFS_RENAME_EVENT(name) \ + DEFINE_EVENT(nfs_rename_event, name, \ + TP_PROTO( \ + const struct inode *old_dir, \ + const struct dentry *old_dentry, \ + const struct inode *new_dir, \ + const struct dentry *new_dentry \ + ), \ + TP_ARGS(old_dir, old_dentry, new_dir, new_dentry)) + +DECLARE_EVENT_CLASS(nfs_rename_event_done, + TP_PROTO( + const struct inode *old_dir, + const struct dentry *old_dentry, + const struct inode *new_dir, + const struct dentry *new_dentry, + int error + ), + + TP_ARGS(old_dir, old_dentry, new_dir, new_dentry, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(int, error) + __field(u64, old_dir) + __string(old_name, old_dentry->d_name.name) + __field(u64, new_dir) + __string(new_name, new_dentry->d_name.name) + ), + + TP_fast_assign( + __entry->dev = old_dir->i_sb->s_dev; + __entry->old_dir = NFS_FILEID(old_dir); + __entry->new_dir = NFS_FILEID(new_dir); + __entry->error = error; + __assign_str(old_name, old_dentry->d_name.name); + __assign_str(new_name, new_dentry->d_name.name); + ), + + TP_printk( + "error=%d old_name=%02x:%02x:%llu/%s " + "new_name=%02x:%02x:%llu/%s", + __entry->error, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->old_dir, + __get_str(old_name), + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->new_dir, + __get_str(new_name) + ) +); +#define DEFINE_NFS_RENAME_EVENT_DONE(name) \ + DEFINE_EVENT(nfs_rename_event_done, name, \ + TP_PROTO( \ + const struct inode *old_dir, \ + const struct dentry *old_dentry, \ + const struct inode *new_dir, \ + const struct dentry *new_dentry, \ + int error \ + ), \ + TP_ARGS(old_dir, old_dentry, new_dir, \ + new_dentry, error)) + +DEFINE_NFS_RENAME_EVENT(nfs_rename_enter); +DEFINE_NFS_RENAME_EVENT_DONE(nfs_rename_exit); + +DEFINE_NFS_RENAME_EVENT_DONE(nfs_sillyrename_rename); + +TRACE_EVENT(nfs_sillyrename_unlink, + TP_PROTO( + const struct nfs_unlinkdata *data, + int error + ), + + TP_ARGS(data, error), + + TP_STRUCT__entry( + __field(dev_t, dev) + __field(int, error) + __field(u64, dir) + __dynamic_array(char, name, data->args.name.len + 1) + ), + + TP_fast_assign( + struct inode *dir = data->dir; + size_t len = data->args.name.len; + __entry->dev = dir->i_sb->s_dev; + __entry->dir = NFS_FILEID(dir); + __entry->error = error; + memcpy(__get_dynamic_array(name), + data->args.name.name, len); + ((char *)__get_dynamic_array(name))[len] = 0; + ), + + TP_printk( + "error=%d name=%02x:%02x:%llu/%s", + __entry->error, + MAJOR(__entry->dev), MINOR(__entry->dev), + (unsigned long long)__entry->dir, + __get_str(name) + ) +); +#endif /* _TRACE_NFS_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#define TRACE_INCLUDE_FILE nfstrace +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/fs/nfs/objlayout/Kbuild b/fs/nfs/objlayout/Kbuild new file mode 100644 index 00000000000..ed30ea072bb --- /dev/null +++ b/fs/nfs/objlayout/Kbuild @@ -0,0 +1,5 @@ +# +# Makefile for the pNFS Objects Layout Driver kernel module +# +objlayoutdriver-y := objio_osd.o pnfs_osd_xdr_cli.o objlayout.o +obj-$(CONFIG_PNFS_OBJLAYOUT) += objlayoutdriver.o diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c new file mode 100644 index 00000000000..611320753db --- /dev/null +++ b/fs/nfs/objlayout/objio_osd.c @@ -0,0 +1,706 @@ +/* + * pNFS Objects layout implementation over open-osd initiator library + * + * Copyright (C) 2009 Panasas Inc. [year of first publication] + * All rights reserved. + * + * Benny Halevy <bhalevy@panasas.com> + * Boaz Harrosh <bharrosh@panasas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * See the file COPYING included with this distribution for more details. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Panasas company nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/module.h> +#include <scsi/osd_ore.h> + +#include "objlayout.h" +#include "../internal.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +struct objio_dev_ent { + struct nfs4_deviceid_node id_node; + struct ore_dev od; +}; + +static void +objio_free_deviceid_node(struct nfs4_deviceid_node *d) +{ + struct objio_dev_ent *de = container_of(d, struct objio_dev_ent, id_node); + + dprintk("%s: free od=%p\n", __func__, de->od.od); + osduld_put_device(de->od.od); + kfree(de); +} + +static struct objio_dev_ent *_dev_list_find(const struct nfs_server *nfss, + const struct nfs4_deviceid *d_id) +{ + struct nfs4_deviceid_node *d; + struct objio_dev_ent *de; + + d = nfs4_find_get_deviceid(nfss->pnfs_curr_ld, nfss->nfs_client, d_id); + if (!d) + return NULL; + + de = container_of(d, struct objio_dev_ent, id_node); + return de; +} + +static struct objio_dev_ent * +_dev_list_add(const struct nfs_server *nfss, + const struct nfs4_deviceid *d_id, struct osd_dev *od, + gfp_t gfp_flags) +{ + struct nfs4_deviceid_node *d; + struct objio_dev_ent *de = kzalloc(sizeof(*de), gfp_flags); + struct objio_dev_ent *n; + + if (!de) { + dprintk("%s: -ENOMEM od=%p\n", __func__, od); + return NULL; + } + + dprintk("%s: Adding od=%p\n", __func__, od); + nfs4_init_deviceid_node(&de->id_node, + nfss->pnfs_curr_ld, + nfss->nfs_client, + d_id); + de->od.od = od; + + d = nfs4_insert_deviceid_node(&de->id_node); + n = container_of(d, struct objio_dev_ent, id_node); + if (n != de) { + dprintk("%s: Race with other n->od=%p\n", __func__, n->od.od); + objio_free_deviceid_node(&de->id_node); + de = n; + } + + return de; +} + +struct objio_segment { + struct pnfs_layout_segment lseg; + + struct ore_layout layout; + struct ore_components oc; +}; + +static inline struct objio_segment * +OBJIO_LSEG(struct pnfs_layout_segment *lseg) +{ + return container_of(lseg, struct objio_segment, lseg); +} + +struct objio_state { + /* Generic layer */ + struct objlayout_io_res oir; + + bool sync; + /*FIXME: Support for extra_bytes at ore_get_rw_state() */ + struct ore_io_state *ios; +}; + +/* Send and wait for a get_device_info of devices in the layout, + then look them up with the osd_initiator library */ +static int objio_devices_lookup(struct pnfs_layout_hdr *pnfslay, + struct objio_segment *objio_seg, unsigned c, struct nfs4_deviceid *d_id, + gfp_t gfp_flags) +{ + struct pnfs_osd_deviceaddr *deviceaddr; + struct objio_dev_ent *ode; + struct osd_dev *od; + struct osd_dev_info odi; + bool retry_flag = true; + int err; + + ode = _dev_list_find(NFS_SERVER(pnfslay->plh_inode), d_id); + if (ode) { + objio_seg->oc.ods[c] = &ode->od; /* must use container_of */ + return 0; + } + + err = objlayout_get_deviceinfo(pnfslay, d_id, &deviceaddr, gfp_flags); + if (unlikely(err)) { + dprintk("%s: objlayout_get_deviceinfo dev(%llx:%llx) =>%d\n", + __func__, _DEVID_LO(d_id), _DEVID_HI(d_id), err); + return err; + } + + odi.systemid_len = deviceaddr->oda_systemid.len; + if (odi.systemid_len > sizeof(odi.systemid)) { + dprintk("%s: odi.systemid_len > sizeof(systemid=%zd)\n", + __func__, sizeof(odi.systemid)); + err = -EINVAL; + goto out; + } else if (odi.systemid_len) + memcpy(odi.systemid, deviceaddr->oda_systemid.data, + odi.systemid_len); + odi.osdname_len = deviceaddr->oda_osdname.len; + odi.osdname = (u8 *)deviceaddr->oda_osdname.data; + + if (!odi.osdname_len && !odi.systemid_len) { + dprintk("%s: !odi.osdname_len && !odi.systemid_len\n", + __func__); + err = -ENODEV; + goto out; + } + +retry_lookup: + od = osduld_info_lookup(&odi); + if (unlikely(IS_ERR(od))) { + err = PTR_ERR(od); + dprintk("%s: osduld_info_lookup => %d\n", __func__, err); + if (err == -ENODEV && retry_flag) { + err = objlayout_autologin(deviceaddr); + if (likely(!err)) { + retry_flag = false; + goto retry_lookup; + } + } + goto out; + } + + ode = _dev_list_add(NFS_SERVER(pnfslay->plh_inode), d_id, od, + gfp_flags); + objio_seg->oc.ods[c] = &ode->od; /* must use container_of */ + dprintk("Adding new dev_id(%llx:%llx)\n", + _DEVID_LO(d_id), _DEVID_HI(d_id)); +out: + objlayout_put_deviceinfo(deviceaddr); + return err; +} + +static void copy_single_comp(struct ore_components *oc, unsigned c, + struct pnfs_osd_object_cred *src_comp) +{ + struct ore_comp *ocomp = &oc->comps[c]; + + WARN_ON(src_comp->oc_cap_key.cred_len > 0); /* libosd is NO_SEC only */ + WARN_ON(src_comp->oc_cap.cred_len > sizeof(ocomp->cred)); + + ocomp->obj.partition = src_comp->oc_object_id.oid_partition_id; + ocomp->obj.id = src_comp->oc_object_id.oid_object_id; + + memcpy(ocomp->cred, src_comp->oc_cap.cred, sizeof(ocomp->cred)); +} + +static int __alloc_objio_seg(unsigned numdevs, gfp_t gfp_flags, + struct objio_segment **pseg) +{ +/* This is the in memory structure of the objio_segment + * + * struct __alloc_objio_segment { + * struct objio_segment olseg; + * struct ore_dev *ods[numdevs]; + * struct ore_comp comps[numdevs]; + * } *aolseg; + * NOTE: The code as above compiles and runs perfectly. It is elegant, + * type safe and compact. At some Past time Linus has decided he does not + * like variable length arrays, For the sake of this principal we uglify + * the code as below. + */ + struct objio_segment *lseg; + size_t lseg_size = sizeof(*lseg) + + numdevs * sizeof(lseg->oc.ods[0]) + + numdevs * sizeof(*lseg->oc.comps); + + lseg = kzalloc(lseg_size, gfp_flags); + if (unlikely(!lseg)) { + dprintk("%s: Failed allocation numdevs=%d size=%zd\n", __func__, + numdevs, lseg_size); + return -ENOMEM; + } + + lseg->oc.numdevs = numdevs; + lseg->oc.single_comp = EC_MULTPLE_COMPS; + lseg->oc.ods = (void *)(lseg + 1); + lseg->oc.comps = (void *)(lseg->oc.ods + numdevs); + + *pseg = lseg; + return 0; +} + +int objio_alloc_lseg(struct pnfs_layout_segment **outp, + struct pnfs_layout_hdr *pnfslay, + struct pnfs_layout_range *range, + struct xdr_stream *xdr, + gfp_t gfp_flags) +{ + struct objio_segment *objio_seg; + struct pnfs_osd_xdr_decode_layout_iter iter; + struct pnfs_osd_layout layout; + struct pnfs_osd_object_cred src_comp; + unsigned cur_comp; + int err; + + err = pnfs_osd_xdr_decode_layout_map(&layout, &iter, xdr); + if (unlikely(err)) + return err; + + err = __alloc_objio_seg(layout.olo_num_comps, gfp_flags, &objio_seg); + if (unlikely(err)) + return err; + + objio_seg->layout.stripe_unit = layout.olo_map.odm_stripe_unit; + objio_seg->layout.group_width = layout.olo_map.odm_group_width; + objio_seg->layout.group_depth = layout.olo_map.odm_group_depth; + objio_seg->layout.mirrors_p1 = layout.olo_map.odm_mirror_cnt + 1; + objio_seg->layout.raid_algorithm = layout.olo_map.odm_raid_algorithm; + + err = ore_verify_layout(layout.olo_map.odm_num_comps, + &objio_seg->layout); + if (unlikely(err)) + goto err; + + objio_seg->oc.first_dev = layout.olo_comps_index; + cur_comp = 0; + while (pnfs_osd_xdr_decode_layout_comp(&src_comp, &iter, xdr, &err)) { + copy_single_comp(&objio_seg->oc, cur_comp, &src_comp); + err = objio_devices_lookup(pnfslay, objio_seg, cur_comp, + &src_comp.oc_object_id.oid_device_id, + gfp_flags); + if (err) + goto err; + ++cur_comp; + } + /* pnfs_osd_xdr_decode_layout_comp returns false on error */ + if (unlikely(err)) + goto err; + + *outp = &objio_seg->lseg; + return 0; + +err: + kfree(objio_seg); + dprintk("%s: Error: return %d\n", __func__, err); + *outp = NULL; + return err; +} + +void objio_free_lseg(struct pnfs_layout_segment *lseg) +{ + int i; + struct objio_segment *objio_seg = OBJIO_LSEG(lseg); + + for (i = 0; i < objio_seg->oc.numdevs; i++) { + struct ore_dev *od = objio_seg->oc.ods[i]; + struct objio_dev_ent *ode; + + if (!od) + break; + ode = container_of(od, typeof(*ode), od); + nfs4_put_deviceid_node(&ode->id_node); + } + kfree(objio_seg); +} + +static int +objio_alloc_io_state(struct pnfs_layout_hdr *pnfs_layout_type, bool is_reading, + struct pnfs_layout_segment *lseg, struct page **pages, unsigned pgbase, + loff_t offset, size_t count, void *rpcdata, gfp_t gfp_flags, + struct objio_state **outp) +{ + struct objio_segment *objio_seg = OBJIO_LSEG(lseg); + struct ore_io_state *ios; + int ret; + struct __alloc_objio_state { + struct objio_state objios; + struct pnfs_osd_ioerr ioerrs[objio_seg->oc.numdevs]; + } *aos; + + aos = kzalloc(sizeof(*aos), gfp_flags); + if (unlikely(!aos)) + return -ENOMEM; + + objlayout_init_ioerrs(&aos->objios.oir, objio_seg->oc.numdevs, + aos->ioerrs, rpcdata, pnfs_layout_type); + + ret = ore_get_rw_state(&objio_seg->layout, &objio_seg->oc, is_reading, + offset, count, &ios); + if (unlikely(ret)) { + kfree(aos); + return ret; + } + + ios->pages = pages; + ios->pgbase = pgbase; + ios->private = aos; + BUG_ON(ios->nr_pages > (pgbase + count + PAGE_SIZE - 1) >> PAGE_SHIFT); + + aos->objios.sync = 0; + aos->objios.ios = ios; + *outp = &aos->objios; + return 0; +} + +void objio_free_result(struct objlayout_io_res *oir) +{ + struct objio_state *objios = container_of(oir, struct objio_state, oir); + + ore_put_io_state(objios->ios); + kfree(objios); +} + +static enum pnfs_osd_errno osd_pri_2_pnfs_err(enum osd_err_priority oep) +{ + switch (oep) { + case OSD_ERR_PRI_NO_ERROR: + return (enum pnfs_osd_errno)0; + + case OSD_ERR_PRI_CLEAR_PAGES: + BUG_ON(1); + return 0; + + case OSD_ERR_PRI_RESOURCE: + return PNFS_OSD_ERR_RESOURCE; + case OSD_ERR_PRI_BAD_CRED: + return PNFS_OSD_ERR_BAD_CRED; + case OSD_ERR_PRI_NO_ACCESS: + return PNFS_OSD_ERR_NO_ACCESS; + case OSD_ERR_PRI_UNREACHABLE: + return PNFS_OSD_ERR_UNREACHABLE; + case OSD_ERR_PRI_NOT_FOUND: + return PNFS_OSD_ERR_NOT_FOUND; + case OSD_ERR_PRI_NO_SPACE: + return PNFS_OSD_ERR_NO_SPACE; + default: + WARN_ON(1); + /* fallthrough */ + case OSD_ERR_PRI_EIO: + return PNFS_OSD_ERR_EIO; + } +} + +static void __on_dev_error(struct ore_io_state *ios, + struct ore_dev *od, unsigned dev_index, enum osd_err_priority oep, + u64 dev_offset, u64 dev_len) +{ + struct objio_state *objios = ios->private; + struct pnfs_osd_objid pooid; + struct objio_dev_ent *ode = container_of(od, typeof(*ode), od); + /* FIXME: what to do with more-then-one-group layouts. We need to + * translate from ore_io_state index to oc->comps index + */ + unsigned comp = dev_index; + + pooid.oid_device_id = ode->id_node.deviceid; + pooid.oid_partition_id = ios->oc->comps[comp].obj.partition; + pooid.oid_object_id = ios->oc->comps[comp].obj.id; + + objlayout_io_set_result(&objios->oir, comp, + &pooid, osd_pri_2_pnfs_err(oep), + dev_offset, dev_len, !ios->reading); +} + +/* + * read + */ +static void _read_done(struct ore_io_state *ios, void *private) +{ + struct objio_state *objios = private; + ssize_t status; + int ret = ore_check_io(ios, &__on_dev_error); + + /* FIXME: _io_free(ios) can we dealocate the libosd resources; */ + + if (likely(!ret)) + status = ios->length; + else + status = ret; + + objlayout_read_done(&objios->oir, status, objios->sync); +} + +int objio_read_pagelist(struct nfs_pgio_data *rdata) +{ + struct nfs_pgio_header *hdr = rdata->header; + struct objio_state *objios; + int ret; + + ret = objio_alloc_io_state(NFS_I(hdr->inode)->layout, true, + hdr->lseg, rdata->args.pages, rdata->args.pgbase, + rdata->args.offset, rdata->args.count, rdata, + GFP_KERNEL, &objios); + if (unlikely(ret)) + return ret; + + objios->ios->done = _read_done; + dprintk("%s: offset=0x%llx length=0x%x\n", __func__, + rdata->args.offset, rdata->args.count); + ret = ore_read(objios->ios); + if (unlikely(ret)) + objio_free_result(&objios->oir); + return ret; +} + +/* + * write + */ +static void _write_done(struct ore_io_state *ios, void *private) +{ + struct objio_state *objios = private; + ssize_t status; + int ret = ore_check_io(ios, &__on_dev_error); + + /* FIXME: _io_free(ios) can we dealocate the libosd resources; */ + + if (likely(!ret)) { + /* FIXME: should be based on the OSD's persistence model + * See OSD2r05 Section 4.13 Data persistence model */ + objios->oir.committed = NFS_FILE_SYNC; + status = ios->length; + } else { + status = ret; + } + + objlayout_write_done(&objios->oir, status, objios->sync); +} + +static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate) +{ + struct objio_state *objios = priv; + struct nfs_pgio_data *wdata = objios->oir.rpcdata; + struct address_space *mapping = wdata->header->inode->i_mapping; + pgoff_t index = offset / PAGE_SIZE; + struct page *page; + loff_t i_size = i_size_read(wdata->header->inode); + + if (offset >= i_size) { + *uptodate = true; + dprintk("%s: g_zero_page index=0x%lx\n", __func__, index); + return ZERO_PAGE(0); + } + + page = find_get_page(mapping, index); + if (!page) { + page = find_or_create_page(mapping, index, GFP_NOFS); + if (unlikely(!page)) { + dprintk("%s: grab_cache_page Failed index=0x%lx\n", + __func__, index); + return NULL; + } + unlock_page(page); + } + if (PageDirty(page) || PageWriteback(page)) + *uptodate = true; + else + *uptodate = PageUptodate(page); + dprintk("%s: index=0x%lx uptodate=%d\n", __func__, index, *uptodate); + return page; +} + +static void __r4w_put_page(void *priv, struct page *page) +{ + dprintk("%s: index=0x%lx\n", __func__, + (page == ZERO_PAGE(0)) ? -1UL : page->index); + if (ZERO_PAGE(0) != page) + page_cache_release(page); + return; +} + +static const struct _ore_r4w_op _r4w_op = { + .get_page = &__r4w_get_page, + .put_page = &__r4w_put_page, +}; + +int objio_write_pagelist(struct nfs_pgio_data *wdata, int how) +{ + struct nfs_pgio_header *hdr = wdata->header; + struct objio_state *objios; + int ret; + + ret = objio_alloc_io_state(NFS_I(hdr->inode)->layout, false, + hdr->lseg, wdata->args.pages, wdata->args.pgbase, + wdata->args.offset, wdata->args.count, wdata, GFP_NOFS, + &objios); + if (unlikely(ret)) + return ret; + + objios->sync = 0 != (how & FLUSH_SYNC); + objios->ios->r4w = &_r4w_op; + + if (!objios->sync) + objios->ios->done = _write_done; + + dprintk("%s: offset=0x%llx length=0x%x\n", __func__, + wdata->args.offset, wdata->args.count); + ret = ore_write(objios->ios); + if (unlikely(ret)) { + objio_free_result(&objios->oir); + return ret; + } + + if (objios->sync) + _write_done(objios->ios, objios); + + return 0; +} + +/* + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. + */ +static size_t objio_pg_test(struct nfs_pageio_descriptor *pgio, + struct nfs_page *prev, struct nfs_page *req) +{ + unsigned int size; + + size = pnfs_generic_pg_test(pgio, prev, req); + + if (!size || pgio->pg_count + req->wb_bytes > + (unsigned long)pgio->pg_layout_private) + return 0; + + return min(size, req->wb_bytes); +} + +static void objio_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) +{ + pnfs_generic_pg_init_read(pgio, req); + if (unlikely(pgio->pg_lseg == NULL)) + return; /* Not pNFS */ + + pgio->pg_layout_private = (void *) + OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length; +} + +static bool aligned_on_raid_stripe(u64 offset, struct ore_layout *layout, + unsigned long *stripe_end) +{ + u32 stripe_off; + unsigned stripe_size; + + if (layout->raid_algorithm == PNFS_OSD_RAID_0) + return true; + + stripe_size = layout->stripe_unit * + (layout->group_width - layout->parity); + + div_u64_rem(offset, stripe_size, &stripe_off); + if (!stripe_off) + return true; + + *stripe_end = stripe_size - stripe_off; + return false; +} + +static void objio_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) +{ + unsigned long stripe_end = 0; + u64 wb_size; + + if (pgio->pg_dreq == NULL) + wb_size = i_size_read(pgio->pg_inode) - req_offset(req); + else + wb_size = nfs_dreq_bytes_left(pgio->pg_dreq); + + pnfs_generic_pg_init_write(pgio, req, wb_size); + if (unlikely(pgio->pg_lseg == NULL)) + return; /* Not pNFS */ + + if (req->wb_offset || + !aligned_on_raid_stripe(req->wb_index * PAGE_SIZE, + &OBJIO_LSEG(pgio->pg_lseg)->layout, + &stripe_end)) { + pgio->pg_layout_private = (void *)stripe_end; + } else { + pgio->pg_layout_private = (void *) + OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length; + } +} + +static const struct nfs_pageio_ops objio_pg_read_ops = { + .pg_init = objio_init_read, + .pg_test = objio_pg_test, + .pg_doio = pnfs_generic_pg_readpages, +}; + +static const struct nfs_pageio_ops objio_pg_write_ops = { + .pg_init = objio_init_write, + .pg_test = objio_pg_test, + .pg_doio = pnfs_generic_pg_writepages, +}; + +static struct pnfs_layoutdriver_type objlayout_type = { + .id = LAYOUT_OSD2_OBJECTS, + .name = "LAYOUT_OSD2_OBJECTS", + .flags = PNFS_LAYOUTRET_ON_SETATTR | + PNFS_LAYOUTRET_ON_ERROR, + + .owner = THIS_MODULE, + .alloc_layout_hdr = objlayout_alloc_layout_hdr, + .free_layout_hdr = objlayout_free_layout_hdr, + + .alloc_lseg = objlayout_alloc_lseg, + .free_lseg = objlayout_free_lseg, + + .read_pagelist = objlayout_read_pagelist, + .write_pagelist = objlayout_write_pagelist, + .pg_read_ops = &objio_pg_read_ops, + .pg_write_ops = &objio_pg_write_ops, + + .free_deviceid_node = objio_free_deviceid_node, + + .encode_layoutcommit = objlayout_encode_layoutcommit, + .encode_layoutreturn = objlayout_encode_layoutreturn, +}; + +MODULE_DESCRIPTION("pNFS Layout Driver for OSD2 objects"); +MODULE_AUTHOR("Benny Halevy <bhalevy@panasas.com>"); +MODULE_LICENSE("GPL"); + +static int __init +objlayout_init(void) +{ + int ret = pnfs_register_layoutdriver(&objlayout_type); + + if (ret) + printk(KERN_INFO + "NFS: %s: Registering OSD pNFS Layout Driver failed: error=%d\n", + __func__, ret); + else + printk(KERN_INFO "NFS: %s: Registered OSD pNFS Layout Driver\n", + __func__); + return ret; +} + +static void __exit +objlayout_exit(void) +{ + pnfs_unregister_layoutdriver(&objlayout_type); + printk(KERN_INFO "NFS: %s: Unregistered OSD pNFS Layout Driver\n", + __func__); +} + +MODULE_ALIAS("nfs-layouttype4-2"); + +module_init(objlayout_init); +module_exit(objlayout_exit); diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c new file mode 100644 index 00000000000..765d3f54e98 --- /dev/null +++ b/fs/nfs/objlayout/objlayout.c @@ -0,0 +1,779 @@ +/* + * pNFS Objects layout driver high level definitions + * + * Copyright (C) 2007 Panasas Inc. [year of first publication] + * All rights reserved. + * + * Benny Halevy <bhalevy@panasas.com> + * Boaz Harrosh <bharrosh@panasas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * See the file COPYING included with this distribution for more details. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Panasas company nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/kmod.h> +#include <linux/moduleparam.h> +#include <linux/ratelimit.h> +#include <scsi/osd_initiator.h> +#include "objlayout.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD +/* + * Create a objlayout layout structure for the given inode and return it. + */ +struct pnfs_layout_hdr * +objlayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) +{ + struct objlayout *objlay; + + objlay = kzalloc(sizeof(struct objlayout), gfp_flags); + if (!objlay) + return NULL; + spin_lock_init(&objlay->lock); + INIT_LIST_HEAD(&objlay->err_list); + dprintk("%s: Return %p\n", __func__, objlay); + return &objlay->pnfs_layout; +} + +/* + * Free an objlayout layout structure + */ +void +objlayout_free_layout_hdr(struct pnfs_layout_hdr *lo) +{ + struct objlayout *objlay = OBJLAYOUT(lo); + + dprintk("%s: objlay %p\n", __func__, objlay); + + WARN_ON(!list_empty(&objlay->err_list)); + kfree(objlay); +} + +/* + * Unmarshall layout and store it in pnfslay. + */ +struct pnfs_layout_segment * +objlayout_alloc_lseg(struct pnfs_layout_hdr *pnfslay, + struct nfs4_layoutget_res *lgr, + gfp_t gfp_flags) +{ + int status = -ENOMEM; + struct xdr_stream stream; + struct xdr_buf buf = { + .pages = lgr->layoutp->pages, + .page_len = lgr->layoutp->len, + .buflen = lgr->layoutp->len, + .len = lgr->layoutp->len, + }; + struct page *scratch; + struct pnfs_layout_segment *lseg; + + dprintk("%s: Begin pnfslay %p\n", __func__, pnfslay); + + scratch = alloc_page(gfp_flags); + if (!scratch) + goto err_nofree; + + xdr_init_decode(&stream, &buf, NULL); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); + + status = objio_alloc_lseg(&lseg, pnfslay, &lgr->range, &stream, gfp_flags); + if (unlikely(status)) { + dprintk("%s: objio_alloc_lseg Return err %d\n", __func__, + status); + goto err; + } + + __free_page(scratch); + + dprintk("%s: Return %p\n", __func__, lseg); + return lseg; + +err: + __free_page(scratch); +err_nofree: + dprintk("%s: Err Return=>%d\n", __func__, status); + return ERR_PTR(status); +} + +/* + * Free a layout segement + */ +void +objlayout_free_lseg(struct pnfs_layout_segment *lseg) +{ + dprintk("%s: freeing layout segment %p\n", __func__, lseg); + + if (unlikely(!lseg)) + return; + + objio_free_lseg(lseg); +} + +/* + * I/O Operations + */ +static inline u64 +end_offset(u64 start, u64 len) +{ + u64 end; + + end = start + len; + return end >= start ? end : NFS4_MAX_UINT64; +} + +static void _fix_verify_io_params(struct pnfs_layout_segment *lseg, + struct page ***p_pages, unsigned *p_pgbase, + u64 offset, unsigned long count) +{ + u64 lseg_end_offset; + + BUG_ON(offset < lseg->pls_range.offset); + lseg_end_offset = end_offset(lseg->pls_range.offset, + lseg->pls_range.length); + BUG_ON(offset >= lseg_end_offset); + WARN_ON(offset + count > lseg_end_offset); + + if (*p_pgbase > PAGE_SIZE) { + dprintk("%s: pgbase(0x%x) > PAGE_SIZE\n", __func__, *p_pgbase); + *p_pages += *p_pgbase >> PAGE_SHIFT; + *p_pgbase &= ~PAGE_MASK; + } +} + +/* + * I/O done common code + */ +static void +objlayout_iodone(struct objlayout_io_res *oir) +{ + if (likely(oir->status >= 0)) { + objio_free_result(oir); + } else { + struct objlayout *objlay = oir->objlay; + + spin_lock(&objlay->lock); + objlay->delta_space_valid = OBJ_DSU_INVALID; + list_add(&objlay->err_list, &oir->err_list); + spin_unlock(&objlay->lock); + } +} + +/* + * objlayout_io_set_result - Set an osd_error code on a specific osd comp. + * + * The @index component IO failed (error returned from target). Register + * the error for later reporting at layout-return. + */ +void +objlayout_io_set_result(struct objlayout_io_res *oir, unsigned index, + struct pnfs_osd_objid *pooid, int osd_error, + u64 offset, u64 length, bool is_write) +{ + struct pnfs_osd_ioerr *ioerr = &oir->ioerrs[index]; + + BUG_ON(index >= oir->num_comps); + if (osd_error) { + ioerr->oer_component = *pooid; + ioerr->oer_comp_offset = offset; + ioerr->oer_comp_length = length; + ioerr->oer_iswrite = is_write; + ioerr->oer_errno = osd_error; + + dprintk("%s: err[%d]: errno=%d is_write=%d dev(%llx:%llx) " + "par=0x%llx obj=0x%llx offset=0x%llx length=0x%llx\n", + __func__, index, ioerr->oer_errno, + ioerr->oer_iswrite, + _DEVID_LO(&ioerr->oer_component.oid_device_id), + _DEVID_HI(&ioerr->oer_component.oid_device_id), + ioerr->oer_component.oid_partition_id, + ioerr->oer_component.oid_object_id, + ioerr->oer_comp_offset, + ioerr->oer_comp_length); + } else { + /* User need not call if no error is reported */ + ioerr->oer_errno = 0; + } +} + +/* Function scheduled on rpc workqueue to call ->nfs_readlist_complete(). + * This is because the osd completion is called with ints-off from + * the block layer + */ +static void _rpc_read_complete(struct work_struct *work) +{ + struct rpc_task *task; + struct nfs_pgio_data *rdata; + + dprintk("%s enter\n", __func__); + task = container_of(work, struct rpc_task, u.tk_work); + rdata = container_of(task, struct nfs_pgio_data, task); + + pnfs_ld_read_done(rdata); +} + +void +objlayout_read_done(struct objlayout_io_res *oir, ssize_t status, bool sync) +{ + struct nfs_pgio_data *rdata = oir->rpcdata; + + oir->status = rdata->task.tk_status = status; + if (status >= 0) + rdata->res.count = status; + else + rdata->header->pnfs_error = status; + objlayout_iodone(oir); + /* must not use oir after this point */ + + dprintk("%s: Return status=%zd eof=%d sync=%d\n", __func__, + status, rdata->res.eof, sync); + + if (sync) + pnfs_ld_read_done(rdata); + else { + INIT_WORK(&rdata->task.u.tk_work, _rpc_read_complete); + schedule_work(&rdata->task.u.tk_work); + } +} + +/* + * Perform sync or async reads. + */ +enum pnfs_try_status +objlayout_read_pagelist(struct nfs_pgio_data *rdata) +{ + struct nfs_pgio_header *hdr = rdata->header; + struct inode *inode = hdr->inode; + loff_t offset = rdata->args.offset; + size_t count = rdata->args.count; + int err; + loff_t eof; + + eof = i_size_read(inode); + if (unlikely(offset + count > eof)) { + if (offset >= eof) { + err = 0; + rdata->res.count = 0; + rdata->res.eof = 1; + /*FIXME: do we need to call pnfs_ld_read_done() */ + goto out; + } + count = eof - offset; + } + + rdata->res.eof = (offset + count) >= eof; + _fix_verify_io_params(hdr->lseg, &rdata->args.pages, + &rdata->args.pgbase, + rdata->args.offset, rdata->args.count); + + dprintk("%s: inode(%lx) offset 0x%llx count 0x%Zx eof=%d\n", + __func__, inode->i_ino, offset, count, rdata->res.eof); + + err = objio_read_pagelist(rdata); + out: + if (unlikely(err)) { + hdr->pnfs_error = err; + dprintk("%s: Returned Error %d\n", __func__, err); + return PNFS_NOT_ATTEMPTED; + } + return PNFS_ATTEMPTED; +} + +/* Function scheduled on rpc workqueue to call ->nfs_writelist_complete(). + * This is because the osd completion is called with ints-off from + * the block layer + */ +static void _rpc_write_complete(struct work_struct *work) +{ + struct rpc_task *task; + struct nfs_pgio_data *wdata; + + dprintk("%s enter\n", __func__); + task = container_of(work, struct rpc_task, u.tk_work); + wdata = container_of(task, struct nfs_pgio_data, task); + + pnfs_ld_write_done(wdata); +} + +void +objlayout_write_done(struct objlayout_io_res *oir, ssize_t status, bool sync) +{ + struct nfs_pgio_data *wdata = oir->rpcdata; + + oir->status = wdata->task.tk_status = status; + if (status >= 0) { + wdata->res.count = status; + wdata->verf.committed = oir->committed; + } else { + wdata->header->pnfs_error = status; + } + objlayout_iodone(oir); + /* must not use oir after this point */ + + dprintk("%s: Return status %zd committed %d sync=%d\n", __func__, + status, wdata->verf.committed, sync); + + if (sync) + pnfs_ld_write_done(wdata); + else { + INIT_WORK(&wdata->task.u.tk_work, _rpc_write_complete); + schedule_work(&wdata->task.u.tk_work); + } +} + +/* + * Perform sync or async writes. + */ +enum pnfs_try_status +objlayout_write_pagelist(struct nfs_pgio_data *wdata, + int how) +{ + struct nfs_pgio_header *hdr = wdata->header; + int err; + + _fix_verify_io_params(hdr->lseg, &wdata->args.pages, + &wdata->args.pgbase, + wdata->args.offset, wdata->args.count); + + err = objio_write_pagelist(wdata, how); + if (unlikely(err)) { + hdr->pnfs_error = err; + dprintk("%s: Returned Error %d\n", __func__, err); + return PNFS_NOT_ATTEMPTED; + } + return PNFS_ATTEMPTED; +} + +void +objlayout_encode_layoutcommit(struct pnfs_layout_hdr *pnfslay, + struct xdr_stream *xdr, + const struct nfs4_layoutcommit_args *args) +{ + struct objlayout *objlay = OBJLAYOUT(pnfslay); + struct pnfs_osd_layoutupdate lou; + __be32 *start; + + dprintk("%s: Begin\n", __func__); + + spin_lock(&objlay->lock); + lou.dsu_valid = (objlay->delta_space_valid == OBJ_DSU_VALID); + lou.dsu_delta = objlay->delta_space_used; + objlay->delta_space_used = 0; + objlay->delta_space_valid = OBJ_DSU_INIT; + lou.olu_ioerr_flag = !list_empty(&objlay->err_list); + spin_unlock(&objlay->lock); + + start = xdr_reserve_space(xdr, 4); + + BUG_ON(pnfs_osd_xdr_encode_layoutupdate(xdr, &lou)); + + *start = cpu_to_be32((xdr->p - start - 1) * 4); + + dprintk("%s: Return delta_space_used %lld err %d\n", __func__, + lou.dsu_delta, lou.olu_ioerr_flag); +} + +static int +err_prio(u32 oer_errno) +{ + switch (oer_errno) { + case 0: + return 0; + + case PNFS_OSD_ERR_RESOURCE: + return OSD_ERR_PRI_RESOURCE; + case PNFS_OSD_ERR_BAD_CRED: + return OSD_ERR_PRI_BAD_CRED; + case PNFS_OSD_ERR_NO_ACCESS: + return OSD_ERR_PRI_NO_ACCESS; + case PNFS_OSD_ERR_UNREACHABLE: + return OSD_ERR_PRI_UNREACHABLE; + case PNFS_OSD_ERR_NOT_FOUND: + return OSD_ERR_PRI_NOT_FOUND; + case PNFS_OSD_ERR_NO_SPACE: + return OSD_ERR_PRI_NO_SPACE; + default: + WARN_ON(1); + /* fallthrough */ + case PNFS_OSD_ERR_EIO: + return OSD_ERR_PRI_EIO; + } +} + +static void +merge_ioerr(struct pnfs_osd_ioerr *dest_err, + const struct pnfs_osd_ioerr *src_err) +{ + u64 dest_end, src_end; + + if (!dest_err->oer_errno) { + *dest_err = *src_err; + /* accumulated device must be blank */ + memset(&dest_err->oer_component.oid_device_id, 0, + sizeof(dest_err->oer_component.oid_device_id)); + + return; + } + + if (dest_err->oer_component.oid_partition_id != + src_err->oer_component.oid_partition_id) + dest_err->oer_component.oid_partition_id = 0; + + if (dest_err->oer_component.oid_object_id != + src_err->oer_component.oid_object_id) + dest_err->oer_component.oid_object_id = 0; + + if (dest_err->oer_comp_offset > src_err->oer_comp_offset) + dest_err->oer_comp_offset = src_err->oer_comp_offset; + + dest_end = end_offset(dest_err->oer_comp_offset, + dest_err->oer_comp_length); + src_end = end_offset(src_err->oer_comp_offset, + src_err->oer_comp_length); + if (dest_end < src_end) + dest_end = src_end; + + dest_err->oer_comp_length = dest_end - dest_err->oer_comp_offset; + + if ((src_err->oer_iswrite == dest_err->oer_iswrite) && + (err_prio(src_err->oer_errno) > err_prio(dest_err->oer_errno))) { + dest_err->oer_errno = src_err->oer_errno; + } else if (src_err->oer_iswrite) { + dest_err->oer_iswrite = true; + dest_err->oer_errno = src_err->oer_errno; + } +} + +static void +encode_accumulated_error(struct objlayout *objlay, __be32 *p) +{ + struct objlayout_io_res *oir, *tmp; + struct pnfs_osd_ioerr accumulated_err = {.oer_errno = 0}; + + list_for_each_entry_safe(oir, tmp, &objlay->err_list, err_list) { + unsigned i; + + for (i = 0; i < oir->num_comps; i++) { + struct pnfs_osd_ioerr *ioerr = &oir->ioerrs[i]; + + if (!ioerr->oer_errno) + continue; + + printk(KERN_ERR "NFS: %s: err[%d]: errno=%d " + "is_write=%d dev(%llx:%llx) par=0x%llx " + "obj=0x%llx offset=0x%llx length=0x%llx\n", + __func__, i, ioerr->oer_errno, + ioerr->oer_iswrite, + _DEVID_LO(&ioerr->oer_component.oid_device_id), + _DEVID_HI(&ioerr->oer_component.oid_device_id), + ioerr->oer_component.oid_partition_id, + ioerr->oer_component.oid_object_id, + ioerr->oer_comp_offset, + ioerr->oer_comp_length); + + merge_ioerr(&accumulated_err, ioerr); + } + list_del(&oir->err_list); + objio_free_result(oir); + } + + pnfs_osd_xdr_encode_ioerr(p, &accumulated_err); +} + +void +objlayout_encode_layoutreturn(struct pnfs_layout_hdr *pnfslay, + struct xdr_stream *xdr, + const struct nfs4_layoutreturn_args *args) +{ + struct objlayout *objlay = OBJLAYOUT(pnfslay); + struct objlayout_io_res *oir, *tmp; + __be32 *start; + + dprintk("%s: Begin\n", __func__); + start = xdr_reserve_space(xdr, 4); + BUG_ON(!start); + + spin_lock(&objlay->lock); + + list_for_each_entry_safe(oir, tmp, &objlay->err_list, err_list) { + __be32 *last_xdr = NULL, *p; + unsigned i; + int res = 0; + + for (i = 0; i < oir->num_comps; i++) { + struct pnfs_osd_ioerr *ioerr = &oir->ioerrs[i]; + + if (!ioerr->oer_errno) + continue; + + dprintk("%s: err[%d]: errno=%d is_write=%d " + "dev(%llx:%llx) par=0x%llx obj=0x%llx " + "offset=0x%llx length=0x%llx\n", + __func__, i, ioerr->oer_errno, + ioerr->oer_iswrite, + _DEVID_LO(&ioerr->oer_component.oid_device_id), + _DEVID_HI(&ioerr->oer_component.oid_device_id), + ioerr->oer_component.oid_partition_id, + ioerr->oer_component.oid_object_id, + ioerr->oer_comp_offset, + ioerr->oer_comp_length); + + p = pnfs_osd_xdr_ioerr_reserve_space(xdr); + if (unlikely(!p)) { + res = -E2BIG; + break; /* accumulated_error */ + } + + last_xdr = p; + pnfs_osd_xdr_encode_ioerr(p, &oir->ioerrs[i]); + } + + /* TODO: use xdr_write_pages */ + if (unlikely(res)) { + /* no space for even one error descriptor */ + BUG_ON(!last_xdr); + + /* we've encountered a situation with lots and lots of + * errors and no space to encode them all. Use the last + * available slot to report the union of all the + * remaining errors. + */ + encode_accumulated_error(objlay, last_xdr); + goto loop_done; + } + list_del(&oir->err_list); + objio_free_result(oir); + } +loop_done: + spin_unlock(&objlay->lock); + + *start = cpu_to_be32((xdr->p - start - 1) * 4); + dprintk("%s: Return\n", __func__); +} + + +/* + * Get Device Info API for io engines + */ +struct objlayout_deviceinfo { + struct page *page; + struct pnfs_osd_deviceaddr da; /* This must be last */ +}; + +/* Initialize and call nfs_getdeviceinfo, then decode and return a + * "struct pnfs_osd_deviceaddr *" Eventually objlayout_put_deviceinfo() + * should be called. + */ +int objlayout_get_deviceinfo(struct pnfs_layout_hdr *pnfslay, + struct nfs4_deviceid *d_id, struct pnfs_osd_deviceaddr **deviceaddr, + gfp_t gfp_flags) +{ + struct objlayout_deviceinfo *odi; + struct pnfs_device pd; + struct page *page, **pages; + u32 *p; + int err; + + page = alloc_page(gfp_flags); + if (!page) + return -ENOMEM; + + pages = &page; + pd.pages = pages; + + memcpy(&pd.dev_id, d_id, sizeof(*d_id)); + pd.layout_type = LAYOUT_OSD2_OBJECTS; + pd.pages = &page; + pd.pgbase = 0; + pd.pglen = PAGE_SIZE; + pd.mincount = 0; + pd.maxcount = PAGE_SIZE; + + err = nfs4_proc_getdeviceinfo(NFS_SERVER(pnfslay->plh_inode), &pd, + pnfslay->plh_lc_cred); + dprintk("%s nfs_getdeviceinfo returned %d\n", __func__, err); + if (err) + goto err_out; + + p = page_address(page); + odi = kzalloc(sizeof(*odi), gfp_flags); + if (!odi) { + err = -ENOMEM; + goto err_out; + } + pnfs_osd_xdr_decode_deviceaddr(&odi->da, p); + odi->page = page; + *deviceaddr = &odi->da; + return 0; + +err_out: + __free_page(page); + return err; +} + +void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr) +{ + struct objlayout_deviceinfo *odi = container_of(deviceaddr, + struct objlayout_deviceinfo, + da); + + __free_page(odi->page); + kfree(odi); +} + +enum { + OBJLAYOUT_MAX_URI_LEN = 256, OBJLAYOUT_MAX_OSDNAME_LEN = 64, + OBJLAYOUT_MAX_SYSID_HEX_LEN = OSD_SYSTEMID_LEN * 2 + 1, + OSD_LOGIN_UPCALL_PATHLEN = 256 +}; + +static char osd_login_prog[OSD_LOGIN_UPCALL_PATHLEN] = "/sbin/osd_login"; + +module_param_string(osd_login_prog, osd_login_prog, sizeof(osd_login_prog), + 0600); +MODULE_PARM_DESC(osd_login_prog, "Path to the osd_login upcall program"); + +struct __auto_login { + char uri[OBJLAYOUT_MAX_URI_LEN]; + char osdname[OBJLAYOUT_MAX_OSDNAME_LEN]; + char systemid_hex[OBJLAYOUT_MAX_SYSID_HEX_LEN]; +}; + +static int __objlayout_upcall(struct __auto_login *login) +{ + static char *envp[] = { "HOME=/", + "TERM=linux", + "PATH=/sbin:/usr/sbin:/bin:/usr/bin", + NULL + }; + char *argv[8]; + int ret; + + if (unlikely(!osd_login_prog[0])) { + dprintk("%s: osd_login_prog is disabled\n", __func__); + return -EACCES; + } + + dprintk("%s uri: %s\n", __func__, login->uri); + dprintk("%s osdname %s\n", __func__, login->osdname); + dprintk("%s systemid_hex %s\n", __func__, login->systemid_hex); + + argv[0] = (char *)osd_login_prog; + argv[1] = "-u"; + argv[2] = login->uri; + argv[3] = "-o"; + argv[4] = login->osdname; + argv[5] = "-s"; + argv[6] = login->systemid_hex; + argv[7] = NULL; + + ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); + /* + * Disable the upcall mechanism if we're getting an ENOENT or + * EACCES error. The admin can re-enable it on the fly by using + * sysfs to set the objlayoutdriver.osd_login_prog module parameter once + * the problem has been fixed. + */ + if (ret == -ENOENT || ret == -EACCES) { + printk(KERN_ERR "PNFS-OBJ: %s was not found please set " + "objlayoutdriver.osd_login_prog kernel parameter!\n", + osd_login_prog); + osd_login_prog[0] = '\0'; + } + dprintk("%s %s return value: %d\n", __func__, osd_login_prog, ret); + + return ret; +} + +/* Assume dest is all zeros */ +static void __copy_nfsS_and_zero_terminate(struct nfs4_string s, + char *dest, int max_len, + const char *var_name) +{ + if (!s.len) + return; + + if (s.len >= max_len) { + pr_warn_ratelimited( + "objlayout_autologin: %s: s.len(%d) >= max_len(%d)", + var_name, s.len, max_len); + s.len = max_len - 1; /* space for null terminator */ + } + + memcpy(dest, s.data, s.len); +} + +/* Assume sysid is all zeros */ +static void _sysid_2_hex(struct nfs4_string s, + char sysid[OBJLAYOUT_MAX_SYSID_HEX_LEN]) +{ + int i; + char *cur; + + if (!s.len) + return; + + if (s.len != OSD_SYSTEMID_LEN) { + pr_warn_ratelimited( + "objlayout_autologin: systemid_len(%d) != OSD_SYSTEMID_LEN", + s.len); + if (s.len > OSD_SYSTEMID_LEN) + s.len = OSD_SYSTEMID_LEN; + } + + cur = sysid; + for (i = 0; i < s.len; i++) + cur = hex_byte_pack(cur, s.data[i]); +} + +int objlayout_autologin(struct pnfs_osd_deviceaddr *deviceaddr) +{ + int rc; + struct __auto_login login; + + if (!deviceaddr->oda_targetaddr.ota_netaddr.r_addr.len) + return -ENODEV; + + memset(&login, 0, sizeof(login)); + __copy_nfsS_and_zero_terminate( + deviceaddr->oda_targetaddr.ota_netaddr.r_addr, + login.uri, sizeof(login.uri), "URI"); + + __copy_nfsS_and_zero_terminate( + deviceaddr->oda_osdname, + login.osdname, sizeof(login.osdname), "OSDNAME"); + + _sysid_2_hex(deviceaddr->oda_systemid, login.systemid_hex); + + rc = __objlayout_upcall(&login); + if (rc > 0) /* script returns positive values */ + rc = -ENODEV; + + return rc; +} diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h new file mode 100644 index 00000000000..01e041029a6 --- /dev/null +++ b/fs/nfs/objlayout/objlayout.h @@ -0,0 +1,189 @@ +/* + * Data types and function declerations for interfacing with the + * pNFS standard object layout driver. + * + * Copyright (C) 2007 Panasas Inc. [year of first publication] + * All rights reserved. + * + * Benny Halevy <bhalevy@panasas.com> + * Boaz Harrosh <bharrosh@panasas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * See the file COPYING included with this distribution for more details. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Panasas company nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _OBJLAYOUT_H +#define _OBJLAYOUT_H + +#include <linux/nfs_fs.h> +#include <linux/pnfs_osd_xdr.h> +#include "../pnfs.h" + +/* + * per-inode layout + */ +struct objlayout { + struct pnfs_layout_hdr pnfs_layout; + + /* for layout_commit */ + enum osd_delta_space_valid_enum { + OBJ_DSU_INIT = 0, + OBJ_DSU_VALID, + OBJ_DSU_INVALID, + } delta_space_valid; + s64 delta_space_used; /* consumed by write ops */ + + /* for layout_return */ + spinlock_t lock; + struct list_head err_list; +}; + +static inline struct objlayout * +OBJLAYOUT(struct pnfs_layout_hdr *lo) +{ + return container_of(lo, struct objlayout, pnfs_layout); +} + +/* + * per-I/O operation state + * embedded in objects provider io_state data structure + */ +struct objlayout_io_res { + struct objlayout *objlay; + + void *rpcdata; + int status; /* res */ + int committed; /* res */ + + /* Error reporting (layout_return) */ + struct list_head err_list; + unsigned num_comps; + /* Pointer to array of error descriptors of size num_comps. + * It should contain as many entries as devices in the osd_layout + * that participate in the I/O. It is up to the io_engine to allocate + * needed space and set num_comps. + */ + struct pnfs_osd_ioerr *ioerrs; +}; + +static inline +void objlayout_init_ioerrs(struct objlayout_io_res *oir, unsigned num_comps, + struct pnfs_osd_ioerr *ioerrs, void *rpcdata, + struct pnfs_layout_hdr *pnfs_layout_type) +{ + oir->objlay = OBJLAYOUT(pnfs_layout_type); + oir->rpcdata = rpcdata; + INIT_LIST_HEAD(&oir->err_list); + oir->num_comps = num_comps; + oir->ioerrs = ioerrs; +} + +/* + * Raid engine I/O API + */ +extern int objio_alloc_lseg(struct pnfs_layout_segment **outp, + struct pnfs_layout_hdr *pnfslay, + struct pnfs_layout_range *range, + struct xdr_stream *xdr, + gfp_t gfp_flags); +extern void objio_free_lseg(struct pnfs_layout_segment *lseg); + +/* objio_free_result will free these @oir structs received from + * objlayout_{read,write}_done + */ +extern void objio_free_result(struct objlayout_io_res *oir); + +extern int objio_read_pagelist(struct nfs_pgio_data *rdata); +extern int objio_write_pagelist(struct nfs_pgio_data *wdata, int how); + +/* + * callback API + */ +extern void objlayout_io_set_result(struct objlayout_io_res *oir, + unsigned index, struct pnfs_osd_objid *pooid, + int osd_error, u64 offset, u64 length, bool is_write); + +static inline void +objlayout_add_delta_space_used(struct objlayout *objlay, s64 space_used) +{ + /* If one of the I/Os errored out and the delta_space_used was + * invalid we render the complete report as invalid. Protocol mandate + * the DSU be accurate or not reported. + */ + spin_lock(&objlay->lock); + if (objlay->delta_space_valid != OBJ_DSU_INVALID) { + objlay->delta_space_valid = OBJ_DSU_VALID; + objlay->delta_space_used += space_used; + } + spin_unlock(&objlay->lock); +} + +extern void objlayout_read_done(struct objlayout_io_res *oir, + ssize_t status, bool sync); +extern void objlayout_write_done(struct objlayout_io_res *oir, + ssize_t status, bool sync); + +extern int objlayout_get_deviceinfo(struct pnfs_layout_hdr *pnfslay, + struct nfs4_deviceid *d_id, struct pnfs_osd_deviceaddr **deviceaddr, + gfp_t gfp_flags); +extern void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr); + +/* + * exported generic objects function vectors + */ + +extern struct pnfs_layout_hdr *objlayout_alloc_layout_hdr(struct inode *, gfp_t gfp_flags); +extern void objlayout_free_layout_hdr(struct pnfs_layout_hdr *); + +extern struct pnfs_layout_segment *objlayout_alloc_lseg( + struct pnfs_layout_hdr *, + struct nfs4_layoutget_res *, + gfp_t gfp_flags); +extern void objlayout_free_lseg(struct pnfs_layout_segment *); + +extern enum pnfs_try_status objlayout_read_pagelist( + struct nfs_pgio_data *); + +extern enum pnfs_try_status objlayout_write_pagelist( + struct nfs_pgio_data *, + int how); + +extern void objlayout_encode_layoutcommit( + struct pnfs_layout_hdr *, + struct xdr_stream *, + const struct nfs4_layoutcommit_args *); + +extern void objlayout_encode_layoutreturn( + struct pnfs_layout_hdr *, + struct xdr_stream *, + const struct nfs4_layoutreturn_args *); + +extern int objlayout_autologin(struct pnfs_osd_deviceaddr *deviceaddr); + +#endif /* _OBJLAYOUT_H */ diff --git a/fs/nfs/objlayout/pnfs_osd_xdr_cli.c b/fs/nfs/objlayout/pnfs_osd_xdr_cli.c new file mode 100644 index 00000000000..b3918f7ac34 --- /dev/null +++ b/fs/nfs/objlayout/pnfs_osd_xdr_cli.c @@ -0,0 +1,415 @@ +/* + * Object-Based pNFS Layout XDR layer + * + * Copyright (C) 2007 Panasas Inc. [year of first publication] + * All rights reserved. + * + * Benny Halevy <bhalevy@panasas.com> + * Boaz Harrosh <bharrosh@panasas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * See the file COPYING included with this distribution for more details. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Panasas company nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/pnfs_osd_xdr.h> + +#define NFSDBG_FACILITY NFSDBG_PNFS_LD + +/* + * The following implementation is based on RFC5664 + */ + +/* + * struct pnfs_osd_objid { + * struct nfs4_deviceid oid_device_id; + * u64 oid_partition_id; + * u64 oid_object_id; + * }; // xdr size 32 bytes + */ +static __be32 * +_osd_xdr_decode_objid(__be32 *p, struct pnfs_osd_objid *objid) +{ + p = xdr_decode_opaque_fixed(p, objid->oid_device_id.data, + sizeof(objid->oid_device_id.data)); + + p = xdr_decode_hyper(p, &objid->oid_partition_id); + p = xdr_decode_hyper(p, &objid->oid_object_id); + return p; +} +/* + * struct pnfs_osd_opaque_cred { + * u32 cred_len; + * void *cred; + * }; // xdr size [variable] + * The return pointers are from the xdr buffer + */ +static int +_osd_xdr_decode_opaque_cred(struct pnfs_osd_opaque_cred *opaque_cred, + struct xdr_stream *xdr) +{ + __be32 *p = xdr_inline_decode(xdr, 1); + + if (!p) + return -EINVAL; + + opaque_cred->cred_len = be32_to_cpu(*p++); + + p = xdr_inline_decode(xdr, opaque_cred->cred_len); + if (!p) + return -EINVAL; + + opaque_cred->cred = p; + return 0; +} + +/* + * struct pnfs_osd_object_cred { + * struct pnfs_osd_objid oc_object_id; + * u32 oc_osd_version; + * u32 oc_cap_key_sec; + * struct pnfs_osd_opaque_cred oc_cap_key + * struct pnfs_osd_opaque_cred oc_cap; + * }; // xdr size 32 + 4 + 4 + [variable] + [variable] + */ +static int +_osd_xdr_decode_object_cred(struct pnfs_osd_object_cred *comp, + struct xdr_stream *xdr) +{ + __be32 *p = xdr_inline_decode(xdr, 32 + 4 + 4); + int ret; + + if (!p) + return -EIO; + + p = _osd_xdr_decode_objid(p, &comp->oc_object_id); + comp->oc_osd_version = be32_to_cpup(p++); + comp->oc_cap_key_sec = be32_to_cpup(p); + + ret = _osd_xdr_decode_opaque_cred(&comp->oc_cap_key, xdr); + if (unlikely(ret)) + return ret; + + ret = _osd_xdr_decode_opaque_cred(&comp->oc_cap, xdr); + return ret; +} + +/* + * struct pnfs_osd_data_map { + * u32 odm_num_comps; + * u64 odm_stripe_unit; + * u32 odm_group_width; + * u32 odm_group_depth; + * u32 odm_mirror_cnt; + * u32 odm_raid_algorithm; + * }; // xdr size 4 + 8 + 4 + 4 + 4 + 4 + */ +static inline int +_osd_data_map_xdr_sz(void) +{ + return 4 + 8 + 4 + 4 + 4 + 4; +} + +static __be32 * +_osd_xdr_decode_data_map(__be32 *p, struct pnfs_osd_data_map *data_map) +{ + data_map->odm_num_comps = be32_to_cpup(p++); + p = xdr_decode_hyper(p, &data_map->odm_stripe_unit); + data_map->odm_group_width = be32_to_cpup(p++); + data_map->odm_group_depth = be32_to_cpup(p++); + data_map->odm_mirror_cnt = be32_to_cpup(p++); + data_map->odm_raid_algorithm = be32_to_cpup(p++); + dprintk("%s: odm_num_comps=%u odm_stripe_unit=%llu odm_group_width=%u " + "odm_group_depth=%u odm_mirror_cnt=%u odm_raid_algorithm=%u\n", + __func__, + data_map->odm_num_comps, + (unsigned long long)data_map->odm_stripe_unit, + data_map->odm_group_width, + data_map->odm_group_depth, + data_map->odm_mirror_cnt, + data_map->odm_raid_algorithm); + return p; +} + +int pnfs_osd_xdr_decode_layout_map(struct pnfs_osd_layout *layout, + struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr) +{ + __be32 *p; + + memset(iter, 0, sizeof(*iter)); + + p = xdr_inline_decode(xdr, _osd_data_map_xdr_sz() + 4 + 4); + if (unlikely(!p)) + return -EINVAL; + + p = _osd_xdr_decode_data_map(p, &layout->olo_map); + layout->olo_comps_index = be32_to_cpup(p++); + layout->olo_num_comps = be32_to_cpup(p++); + dprintk("%s: olo_comps_index=%d olo_num_comps=%d\n", __func__, + layout->olo_comps_index, layout->olo_num_comps); + + iter->total_comps = layout->olo_num_comps; + return 0; +} + +bool pnfs_osd_xdr_decode_layout_comp(struct pnfs_osd_object_cred *comp, + struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr, + int *err) +{ + BUG_ON(iter->decoded_comps > iter->total_comps); + if (iter->decoded_comps == iter->total_comps) + return false; + + *err = _osd_xdr_decode_object_cred(comp, xdr); + if (unlikely(*err)) { + dprintk("%s: _osd_xdr_decode_object_cred=>%d decoded_comps=%d " + "total_comps=%d\n", __func__, *err, + iter->decoded_comps, iter->total_comps); + return false; /* stop the loop */ + } + dprintk("%s: dev(%llx:%llx) par=0x%llx obj=0x%llx " + "key_len=%u cap_len=%u\n", + __func__, + _DEVID_LO(&comp->oc_object_id.oid_device_id), + _DEVID_HI(&comp->oc_object_id.oid_device_id), + comp->oc_object_id.oid_partition_id, + comp->oc_object_id.oid_object_id, + comp->oc_cap_key.cred_len, comp->oc_cap.cred_len); + + iter->decoded_comps++; + return true; +} + +/* + * Get Device Information Decoding + * + * Note: since Device Information is currently done synchronously, all + * variable strings fields are left inside the rpc buffer and are only + * pointed to by the pnfs_osd_deviceaddr members. So the read buffer + * should not be freed while the returned information is in use. + */ +/* + *struct nfs4_string { + * unsigned int len; + * char *data; + *}; // size [variable] + * NOTE: Returned string points to inside the XDR buffer + */ +static __be32 * +__read_u8_opaque(__be32 *p, struct nfs4_string *str) +{ + str->len = be32_to_cpup(p++); + str->data = (char *)p; + + p += XDR_QUADLEN(str->len); + return p; +} + +/* + * struct pnfs_osd_targetid { + * u32 oti_type; + * struct nfs4_string oti_scsi_device_id; + * };// size 4 + [variable] + */ +static __be32 * +__read_targetid(__be32 *p, struct pnfs_osd_targetid* targetid) +{ + u32 oti_type; + + oti_type = be32_to_cpup(p++); + targetid->oti_type = oti_type; + + switch (oti_type) { + case OBJ_TARGET_SCSI_NAME: + case OBJ_TARGET_SCSI_DEVICE_ID: + p = __read_u8_opaque(p, &targetid->oti_scsi_device_id); + } + + return p; +} + +/* + * struct pnfs_osd_net_addr { + * struct nfs4_string r_netid; + * struct nfs4_string r_addr; + * }; + */ +static __be32 * +__read_net_addr(__be32 *p, struct pnfs_osd_net_addr* netaddr) +{ + p = __read_u8_opaque(p, &netaddr->r_netid); + p = __read_u8_opaque(p, &netaddr->r_addr); + + return p; +} + +/* + * struct pnfs_osd_targetaddr { + * u32 ota_available; + * struct pnfs_osd_net_addr ota_netaddr; + * }; + */ +static __be32 * +__read_targetaddr(__be32 *p, struct pnfs_osd_targetaddr *targetaddr) +{ + u32 ota_available; + + ota_available = be32_to_cpup(p++); + targetaddr->ota_available = ota_available; + + if (ota_available) + p = __read_net_addr(p, &targetaddr->ota_netaddr); + + + return p; +} + +/* + * struct pnfs_osd_deviceaddr { + * struct pnfs_osd_targetid oda_targetid; + * struct pnfs_osd_targetaddr oda_targetaddr; + * u8 oda_lun[8]; + * struct nfs4_string oda_systemid; + * struct pnfs_osd_object_cred oda_root_obj_cred; + * struct nfs4_string oda_osdname; + * }; + */ + +/* We need this version for the pnfs_osd_xdr_decode_deviceaddr which does + * not have an xdr_stream + */ +static __be32 * +__read_opaque_cred(__be32 *p, + struct pnfs_osd_opaque_cred *opaque_cred) +{ + opaque_cred->cred_len = be32_to_cpu(*p++); + opaque_cred->cred = p; + return p + XDR_QUADLEN(opaque_cred->cred_len); +} + +static __be32 * +__read_object_cred(__be32 *p, struct pnfs_osd_object_cred *comp) +{ + p = _osd_xdr_decode_objid(p, &comp->oc_object_id); + comp->oc_osd_version = be32_to_cpup(p++); + comp->oc_cap_key_sec = be32_to_cpup(p++); + + p = __read_opaque_cred(p, &comp->oc_cap_key); + p = __read_opaque_cred(p, &comp->oc_cap); + return p; +} + +void pnfs_osd_xdr_decode_deviceaddr( + struct pnfs_osd_deviceaddr *deviceaddr, __be32 *p) +{ + p = __read_targetid(p, &deviceaddr->oda_targetid); + + p = __read_targetaddr(p, &deviceaddr->oda_targetaddr); + + p = xdr_decode_opaque_fixed(p, deviceaddr->oda_lun, + sizeof(deviceaddr->oda_lun)); + + p = __read_u8_opaque(p, &deviceaddr->oda_systemid); + + p = __read_object_cred(p, &deviceaddr->oda_root_obj_cred); + + p = __read_u8_opaque(p, &deviceaddr->oda_osdname); + + /* libosd likes this terminated in dbg. It's last, so no problems */ + deviceaddr->oda_osdname.data[deviceaddr->oda_osdname.len] = 0; +} + +/* + * struct pnfs_osd_layoutupdate { + * u32 dsu_valid; + * s64 dsu_delta; + * u32 olu_ioerr_flag; + * }; xdr size 4 + 8 + 4 + */ +int +pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr, + struct pnfs_osd_layoutupdate *lou) +{ + __be32 *p = xdr_reserve_space(xdr, 4 + 8 + 4); + + if (!p) + return -E2BIG; + + *p++ = cpu_to_be32(lou->dsu_valid); + if (lou->dsu_valid) + p = xdr_encode_hyper(p, lou->dsu_delta); + *p++ = cpu_to_be32(lou->olu_ioerr_flag); + return 0; +} + +/* + * struct pnfs_osd_objid { + * struct nfs4_deviceid oid_device_id; + * u64 oid_partition_id; + * u64 oid_object_id; + * }; // xdr size 32 bytes + */ +static inline __be32 * +pnfs_osd_xdr_encode_objid(__be32 *p, struct pnfs_osd_objid *object_id) +{ + p = xdr_encode_opaque_fixed(p, &object_id->oid_device_id.data, + sizeof(object_id->oid_device_id.data)); + p = xdr_encode_hyper(p, object_id->oid_partition_id); + p = xdr_encode_hyper(p, object_id->oid_object_id); + + return p; +} + +/* + * struct pnfs_osd_ioerr { + * struct pnfs_osd_objid oer_component; + * u64 oer_comp_offset; + * u64 oer_comp_length; + * u32 oer_iswrite; + * u32 oer_errno; + * }; // xdr size 32 + 24 bytes + */ +void pnfs_osd_xdr_encode_ioerr(__be32 *p, struct pnfs_osd_ioerr *ioerr) +{ + p = pnfs_osd_xdr_encode_objid(p, &ioerr->oer_component); + p = xdr_encode_hyper(p, ioerr->oer_comp_offset); + p = xdr_encode_hyper(p, ioerr->oer_comp_length); + *p++ = cpu_to_be32(ioerr->oer_iswrite); + *p = cpu_to_be32(ioerr->oer_errno); +} + +__be32 *pnfs_osd_xdr_ioerr_reserve_space(struct xdr_stream *xdr) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 32 + 24); + if (unlikely(!p)) + dprintk("%s: out of xdr space\n", __func__); + + return p; +} diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 137b549e63d..17fab89f635 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -13,25 +13,71 @@ #include <linux/file.h> #include <linux/sched.h> #include <linux/sunrpc/clnt.h> +#include <linux/nfs.h> #include <linux/nfs3.h> #include <linux/nfs4.h> #include <linux/nfs_page.h> #include <linux/nfs_fs.h> #include <linux/nfs_mount.h> +#include <linux/export.h> #include "internal.h" +#include "pnfs.h" + +#define NFSDBG_FACILITY NFSDBG_PAGECACHE static struct kmem_cache *nfs_page_cachep; +static const struct rpc_call_ops nfs_pgio_common_ops; + +static bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount) +{ + p->npages = pagecount; + if (pagecount <= ARRAY_SIZE(p->page_array)) + p->pagevec = p->page_array; + else { + p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL); + if (!p->pagevec) + p->npages = 0; + } + return p->pagevec != NULL; +} + +void nfs_pgheader_init(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr, + void (*release)(struct nfs_pgio_header *hdr)) +{ + hdr->req = nfs_list_entry(desc->pg_list.next); + hdr->inode = desc->pg_inode; + hdr->cred = hdr->req->wb_context->cred; + hdr->io_start = req_offset(hdr->req); + hdr->good_bytes = desc->pg_count; + hdr->dreq = desc->pg_dreq; + hdr->layout_private = desc->pg_layout_private; + hdr->release = release; + hdr->completion_ops = desc->pg_completion_ops; + if (hdr->completion_ops->init_hdr) + hdr->completion_ops->init_hdr(hdr); +} +EXPORT_SYMBOL_GPL(nfs_pgheader_init); + +void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos) +{ + spin_lock(&hdr->lock); + if (pos < hdr->io_start + hdr->good_bytes) { + set_bit(NFS_IOHDR_ERROR, &hdr->flags); + clear_bit(NFS_IOHDR_EOF, &hdr->flags); + hdr->good_bytes = pos - hdr->io_start; + hdr->error = error; + } + spin_unlock(&hdr->lock); +} static inline struct nfs_page * nfs_page_alloc(void) { - struct nfs_page *p; - p = kmem_cache_alloc(nfs_page_cachep, GFP_KERNEL); - if (p) { - memset(p, 0, sizeof(*p)); + struct nfs_page *p = kmem_cache_zalloc(nfs_page_cachep, GFP_NOIO); + if (p) INIT_LIST_HEAD(&p->wb_list); - } return p; } @@ -41,11 +87,217 @@ nfs_page_free(struct nfs_page *p) kmem_cache_free(nfs_page_cachep, p); } +static void +nfs_iocounter_inc(struct nfs_io_counter *c) +{ + atomic_inc(&c->io_count); +} + +static void +nfs_iocounter_dec(struct nfs_io_counter *c) +{ + if (atomic_dec_and_test(&c->io_count)) { + clear_bit(NFS_IO_INPROGRESS, &c->flags); + smp_mb__after_atomic(); + wake_up_bit(&c->flags, NFS_IO_INPROGRESS); + } +} + +static int +__nfs_iocounter_wait(struct nfs_io_counter *c) +{ + wait_queue_head_t *wq = bit_waitqueue(&c->flags, NFS_IO_INPROGRESS); + DEFINE_WAIT_BIT(q, &c->flags, NFS_IO_INPROGRESS); + int ret = 0; + + do { + prepare_to_wait(wq, &q.wait, TASK_KILLABLE); + set_bit(NFS_IO_INPROGRESS, &c->flags); + if (atomic_read(&c->io_count) == 0) + break; + ret = nfs_wait_bit_killable(&c->flags); + } while (atomic_read(&c->io_count) != 0); + finish_wait(wq, &q.wait); + return ret; +} + +/** + * nfs_iocounter_wait - wait for i/o to complete + * @c: nfs_io_counter to use + * + * returns -ERESTARTSYS if interrupted by a fatal signal. + * Otherwise returns 0 once the io_count hits 0. + */ +int +nfs_iocounter_wait(struct nfs_io_counter *c) +{ + if (atomic_read(&c->io_count) == 0) + return 0; + return __nfs_iocounter_wait(c); +} + +static int nfs_wait_bit_uninterruptible(void *word) +{ + io_schedule(); + return 0; +} + +/* + * nfs_page_group_lock - lock the head of the page group + * @req - request in group that is to be locked + * + * this lock must be held if modifying the page group list + */ +void +nfs_page_group_lock(struct nfs_page *req) +{ + struct nfs_page *head = req->wb_head; + + WARN_ON_ONCE(head != head->wb_head); + + wait_on_bit_lock(&head->wb_flags, PG_HEADLOCK, + nfs_wait_bit_uninterruptible, + TASK_UNINTERRUPTIBLE); +} + +/* + * nfs_page_group_unlock - unlock the head of the page group + * @req - request in group that is to be unlocked + */ +void +nfs_page_group_unlock(struct nfs_page *req) +{ + struct nfs_page *head = req->wb_head; + + WARN_ON_ONCE(head != head->wb_head); + + smp_mb__before_atomic(); + clear_bit(PG_HEADLOCK, &head->wb_flags); + smp_mb__after_atomic(); + wake_up_bit(&head->wb_flags, PG_HEADLOCK); +} + +/* + * nfs_page_group_sync_on_bit_locked + * + * must be called with page group lock held + */ +static bool +nfs_page_group_sync_on_bit_locked(struct nfs_page *req, unsigned int bit) +{ + struct nfs_page *head = req->wb_head; + struct nfs_page *tmp; + + WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_flags)); + WARN_ON_ONCE(test_and_set_bit(bit, &req->wb_flags)); + + tmp = req->wb_this_page; + while (tmp != req) { + if (!test_bit(bit, &tmp->wb_flags)) + return false; + tmp = tmp->wb_this_page; + } + + /* true! reset all bits */ + tmp = req; + do { + clear_bit(bit, &tmp->wb_flags); + tmp = tmp->wb_this_page; + } while (tmp != req); + + return true; +} + +/* + * nfs_page_group_sync_on_bit - set bit on current request, but only + * return true if the bit is set for all requests in page group + * @req - request in page group + * @bit - PG_* bit that is used to sync page group + */ +bool nfs_page_group_sync_on_bit(struct nfs_page *req, unsigned int bit) +{ + bool ret; + + nfs_page_group_lock(req); + ret = nfs_page_group_sync_on_bit_locked(req, bit); + nfs_page_group_unlock(req); + + return ret; +} + +/* + * nfs_page_group_init - Initialize the page group linkage for @req + * @req - a new nfs request + * @prev - the previous request in page group, or NULL if @req is the first + * or only request in the group (the head). + */ +static inline void +nfs_page_group_init(struct nfs_page *req, struct nfs_page *prev) +{ + WARN_ON_ONCE(prev == req); + + if (!prev) { + /* a head request */ + req->wb_head = req; + req->wb_this_page = req; + } else { + /* a subrequest */ + WARN_ON_ONCE(prev->wb_this_page != prev->wb_head); + WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags)); + req->wb_head = prev->wb_head; + req->wb_this_page = prev->wb_this_page; + prev->wb_this_page = req; + + /* All subrequests take a ref on the head request until + * nfs_page_group_destroy is called */ + kref_get(&req->wb_head->wb_kref); + + /* grab extra ref if head request has extra ref from + * the write/commit path to handle handoff between write + * and commit lists */ + if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) { + set_bit(PG_INODE_REF, &req->wb_flags); + kref_get(&req->wb_kref); + } + } +} + +/* + * nfs_page_group_destroy - sync the destruction of page groups + * @req - request that no longer needs the page group + * + * releases the page group reference from each member once all + * members have called this function. + */ +static void +nfs_page_group_destroy(struct kref *kref) +{ + struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref); + struct nfs_page *tmp, *next; + + /* subrequests must release the ref on the head request */ + if (req->wb_head != req) + nfs_release_request(req->wb_head); + + if (!nfs_page_group_sync_on_bit(req, PG_TEARDOWN)) + return; + + tmp = req; + do { + next = tmp->wb_this_page; + /* unlink and free */ + tmp->wb_this_page = tmp; + tmp->wb_head = tmp; + nfs_free_request(tmp); + tmp = next; + } while (tmp != req); +} + /** * nfs_create_request - Create an NFS read/write request. - * @file: file descriptor to use - * @inode: inode to which the request is attached + * @ctx: open context to use * @page: page to write + * @last: last nfs request created for this page group or NULL if head * @offset: starting offset within the page for the write * @count: number of bytes to read/write * @@ -54,39 +306,41 @@ nfs_page_free(struct nfs_page *p) * User should ensure it is safe to sleep in this function. */ struct nfs_page * -nfs_create_request(struct nfs_open_context *ctx, struct inode *inode, - struct page *page, - unsigned int offset, unsigned int count) +nfs_create_request(struct nfs_open_context *ctx, struct page *page, + struct nfs_page *last, unsigned int offset, + unsigned int count) { struct nfs_page *req; + struct nfs_lock_context *l_ctx; + if (test_bit(NFS_CONTEXT_BAD, &ctx->flags)) + return ERR_PTR(-EBADF); /* try to allocate the request struct */ req = nfs_page_alloc(); if (req == NULL) return ERR_PTR(-ENOMEM); /* get lock context early so we can deal with alloc failures */ - req->wb_lock_context = nfs_get_lock_context(ctx); - if (req->wb_lock_context == NULL) { + l_ctx = nfs_get_lock_context(ctx); + if (IS_ERR(l_ctx)) { nfs_page_free(req); - return ERR_PTR(-ENOMEM); + return ERR_CAST(l_ctx); } + req->wb_lock_context = l_ctx; + nfs_iocounter_inc(&l_ctx->io_count); /* Initialize the request struct. Initially, we assume a * long write-back delay. This will be adjusted in * update_nfs_request below if the region is not locked. */ req->wb_page = page; - atomic_set(&req->wb_complete, 0); - req->wb_index = page->index; + req->wb_index = page_file_index(page); page_cache_get(page); - BUG_ON(PagePrivate(page)); - BUG_ON(!PageLocked(page)); - BUG_ON(page->mapping->host != inode); req->wb_offset = offset; req->wb_pgbase = offset; req->wb_bytes = count; req->wb_context = get_nfs_open_context(ctx); kref_init(&req->wb_kref); + nfs_page_group_init(req, last); return req; } @@ -100,51 +354,30 @@ void nfs_unlock_request(struct nfs_page *req) printk(KERN_ERR "NFS: Invalid unlock attempted\n"); BUG(); } - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(PG_BUSY, &req->wb_flags); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); wake_up_bit(&req->wb_flags, PG_BUSY); - nfs_release_request(req); } /** - * nfs_set_page_tag_locked - Tag a request as locked + * nfs_unlock_and_release_request - Unlock request and release the nfs_page * @req: */ -int nfs_set_page_tag_locked(struct nfs_page *req) -{ - if (!nfs_lock_request_dontget(req)) - return 0; - if (req->wb_page != NULL) - radix_tree_tag_set(&NFS_I(req->wb_context->path.dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED); - return 1; -} - -/** - * nfs_clear_page_tag_locked - Clear request tag and wake up sleepers - */ -void nfs_clear_page_tag_locked(struct nfs_page *req) +void nfs_unlock_and_release_request(struct nfs_page *req) { - if (req->wb_page != NULL) { - struct inode *inode = req->wb_context->path.dentry->d_inode; - struct nfs_inode *nfsi = NFS_I(inode); - - spin_lock(&inode->i_lock); - radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED); - nfs_unlock_request(req); - spin_unlock(&inode->i_lock); - } else - nfs_unlock_request(req); + nfs_unlock_request(req); + nfs_release_request(req); } -/** +/* * nfs_clear_request - Free up all resources allocated to the request * @req: * * Release page and open context resources associated with a read/write * request after it has completed. */ -void nfs_clear_request(struct nfs_page *req) +static void nfs_clear_request(struct nfs_page *req) { struct page *page = req->wb_page; struct nfs_open_context *ctx = req->wb_context; @@ -155,6 +388,7 @@ void nfs_clear_request(struct nfs_page *req) req->wb_page = NULL; } if (l_ctx != NULL) { + nfs_iocounter_dec(&l_ctx->io_count); nfs_put_lock_context(l_ctx); req->wb_lock_context = NULL; } @@ -164,16 +398,22 @@ void nfs_clear_request(struct nfs_page *req) } } - /** * nfs_release_request - Release the count on an NFS read/write request * @req: request to release * * Note: Should never be called with the spinlock held! */ -static void nfs_free_request(struct kref *kref) +void nfs_free_request(struct nfs_page *req) { - struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref); + WARN_ON_ONCE(req->wb_this_page != req); + + /* extra debug: make sure no sync bits are still set */ + WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags)); + WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags)); + WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags)); + WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags)); + WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags)); /* Release struct file and open context */ nfs_clear_request(req); @@ -182,13 +422,7 @@ static void nfs_free_request(struct kref *kref) void nfs_release_request(struct nfs_page *req) { - kref_put(&req->wb_kref, nfs_free_request); -} - -static int nfs_wait_bit_uninterruptible(void *word) -{ - io_schedule(); - return 0; + kref_put(&req->wb_kref, nfs_page_group_destroy); } /** @@ -206,6 +440,249 @@ nfs_wait_on_request(struct nfs_page *req) TASK_UNINTERRUPTIBLE); } +/* + * nfs_generic_pg_test - determine if requests can be coalesced + * @desc: pointer to descriptor + * @prev: previous request in desc, or NULL + * @req: this request + * + * Returns zero if @req can be coalesced into @desc, otherwise it returns + * the size of the request. + */ +size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, + struct nfs_page *prev, struct nfs_page *req) +{ + if (desc->pg_count > desc->pg_bsize) { + /* should never happen */ + WARN_ON_ONCE(1); + return 0; + } + + return min(desc->pg_bsize - desc->pg_count, (size_t)req->wb_bytes); +} +EXPORT_SYMBOL_GPL(nfs_generic_pg_test); + +static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr) +{ + return container_of(hdr, struct nfs_rw_header, header); +} + +/** + * nfs_rw_header_alloc - Allocate a header for a read or write + * @ops: Read or write function vector + */ +struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *ops) +{ + struct nfs_rw_header *header = ops->rw_alloc_header(); + + if (header) { + struct nfs_pgio_header *hdr = &header->header; + + INIT_LIST_HEAD(&hdr->pages); + spin_lock_init(&hdr->lock); + atomic_set(&hdr->refcnt, 0); + hdr->rw_ops = ops; + } + return header; +} +EXPORT_SYMBOL_GPL(nfs_rw_header_alloc); + +/* + * nfs_rw_header_free - Free a read or write header + * @hdr: The header to free + */ +void nfs_rw_header_free(struct nfs_pgio_header *hdr) +{ + hdr->rw_ops->rw_free_header(NFS_RW_HEADER(hdr)); +} +EXPORT_SYMBOL_GPL(nfs_rw_header_free); + +/** + * nfs_pgio_data_alloc - Allocate pageio data + * @hdr: The header making a request + * @pagecount: Number of pages to create + */ +static struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *hdr, + unsigned int pagecount) +{ + struct nfs_pgio_data *data, *prealloc; + + prealloc = &NFS_RW_HEADER(hdr)->rpc_data; + if (prealloc->header == NULL) + data = prealloc; + else + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + goto out; + + if (nfs_pgarray_set(&data->pages, pagecount)) { + data->header = hdr; + atomic_inc(&hdr->refcnt); + } else { + if (data != prealloc) + kfree(data); + data = NULL; + } +out: + return data; +} + +/** + * nfs_pgio_data_release - Properly free pageio data + * @data: The data to release + */ +void nfs_pgio_data_release(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + struct nfs_rw_header *pageio_header = NFS_RW_HEADER(hdr); + + put_nfs_open_context(data->args.context); + if (data->pages.pagevec != data->pages.page_array) + kfree(data->pages.pagevec); + if (data == &pageio_header->rpc_data) { + data->header = NULL; + data = NULL; + } + if (atomic_dec_and_test(&hdr->refcnt)) + hdr->completion_ops->completion(hdr); + /* Note: we only free the rpc_task after callbacks are done. + * See the comment in rpc_free_task() for why + */ + kfree(data); +} +EXPORT_SYMBOL_GPL(nfs_pgio_data_release); + +/** + * nfs_pgio_rpcsetup - Set up arguments for a pageio call + * @data: The pageio data + * @count: Number of bytes to read + * @offset: Initial offset + * @how: How to commit data (writes only) + * @cinfo: Commit information for the call (writes only) + */ +static void nfs_pgio_rpcsetup(struct nfs_pgio_data *data, + unsigned int count, unsigned int offset, + int how, struct nfs_commit_info *cinfo) +{ + struct nfs_page *req = data->header->req; + + /* Set up the RPC argument and reply structs + * NB: take care not to mess about with data->commit et al. */ + + data->args.fh = NFS_FH(data->header->inode); + data->args.offset = req_offset(req) + offset; + /* pnfs_set_layoutcommit needs this */ + data->mds_offset = data->args.offset; + data->args.pgbase = req->wb_pgbase + offset; + data->args.pages = data->pages.pagevec; + data->args.count = count; + data->args.context = get_nfs_open_context(req->wb_context); + data->args.lock_context = req->wb_lock_context; + data->args.stable = NFS_UNSTABLE; + switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) { + case 0: + break; + case FLUSH_COND_STABLE: + if (nfs_reqs_to_commit(cinfo)) + break; + default: + data->args.stable = NFS_FILE_SYNC; + } + + data->res.fattr = &data->fattr; + data->res.count = count; + data->res.eof = 0; + data->res.verf = &data->verf; + nfs_fattr_init(&data->fattr); +} + +/** + * nfs_pgio_prepare - Prepare pageio data to go over the wire + * @task: The current task + * @calldata: pageio data to prepare + */ +static void nfs_pgio_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs_pgio_data *data = calldata; + int err; + err = NFS_PROTO(data->header->inode)->pgio_rpc_prepare(task, data); + if (err) + rpc_exit(task, err); +} + +int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_data *data, + const struct rpc_call_ops *call_ops, int how, int flags) +{ + struct rpc_task *task; + struct rpc_message msg = { + .rpc_argp = &data->args, + .rpc_resp = &data->res, + .rpc_cred = data->header->cred, + }; + struct rpc_task_setup task_setup_data = { + .rpc_client = clnt, + .task = &data->task, + .rpc_message = &msg, + .callback_ops = call_ops, + .callback_data = data, + .workqueue = nfsiod_workqueue, + .flags = RPC_TASK_ASYNC | flags, + }; + int ret = 0; + + data->header->rw_ops->rw_initiate(data, &msg, &task_setup_data, how); + + dprintk("NFS: %5u initiated pgio call " + "(req %s/%llu, %u bytes @ offset %llu)\n", + data->task.tk_pid, + data->header->inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(data->header->inode), + data->args.count, + (unsigned long long)data->args.offset); + + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) { + ret = PTR_ERR(task); + goto out; + } + if (how & FLUSH_SYNC) { + ret = rpc_wait_for_completion_task(task); + if (ret == 0) + ret = task->tk_status; + } + rpc_put_task(task); +out: + return ret; +} +EXPORT_SYMBOL_GPL(nfs_initiate_pgio); + +/** + * nfs_pgio_error - Clean up from a pageio error + * @desc: IO descriptor + * @hdr: pageio header + */ +static int nfs_pgio_error(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr) +{ + set_bit(NFS_IOHDR_REDO, &hdr->flags); + nfs_pgio_data_release(hdr->data); + hdr->data = NULL; + desc->pg_completion_ops->error_cleanup(&desc->pg_list); + return -ENOMEM; +} + +/** + * nfs_pgio_release - Release pageio data + * @calldata: The pageio data to release + */ +static void nfs_pgio_release(void *calldata) +{ + struct nfs_pgio_data *data = calldata; + if (data->header->rw_ops->rw_release) + data->header->rw_ops->rw_release(data); + nfs_pgio_data_release(data); +} + /** * nfs_pageio_init - initialise a page io descriptor * @desc: pointer to descriptor @@ -216,7 +693,9 @@ nfs_wait_on_request(struct nfs_page *req) */ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, struct inode *inode, - int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int), + const struct nfs_pageio_ops *pg_ops, + const struct nfs_pgio_completion_ops *compl_ops, + const struct nfs_rw_ops *rw_ops, size_t bsize, int io_flags) { @@ -225,10 +704,119 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, desc->pg_count = 0; desc->pg_bsize = bsize; desc->pg_base = 0; + desc->pg_moreio = 0; + desc->pg_recoalesce = 0; desc->pg_inode = inode; - desc->pg_doio = doio; + desc->pg_ops = pg_ops; + desc->pg_completion_ops = compl_ops; + desc->pg_rw_ops = rw_ops; desc->pg_ioflags = io_flags; desc->pg_error = 0; + desc->pg_lseg = NULL; + desc->pg_dreq = NULL; + desc->pg_layout_private = NULL; +} +EXPORT_SYMBOL_GPL(nfs_pageio_init); + +/** + * nfs_pgio_result - Basic pageio error handling + * @task: The task that ran + * @calldata: Pageio data to check + */ +static void nfs_pgio_result(struct rpc_task *task, void *calldata) +{ + struct nfs_pgio_data *data = calldata; + struct inode *inode = data->header->inode; + + dprintk("NFS: %s: %5u, (status %d)\n", __func__, + task->tk_pid, task->tk_status); + + if (data->header->rw_ops->rw_done(task, data, inode) != 0) + return; + if (task->tk_status < 0) + nfs_set_pgio_error(data->header, task->tk_status, data->args.offset); + else + data->header->rw_ops->rw_result(task, data); +} + +/* + * Create an RPC task for the given read or write request and kick it. + * The page must have been locked by the caller. + * + * It may happen that the page we're passed is not marked dirty. + * This is the case if nfs_updatepage detects a conflicting request + * that has been written but not committed. + */ +int nfs_generic_pgio(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr) +{ + struct nfs_page *req; + struct page **pages; + struct nfs_pgio_data *data; + struct list_head *head = &desc->pg_list; + struct nfs_commit_info cinfo; + + data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base, + desc->pg_count)); + if (!data) + return nfs_pgio_error(desc, hdr); + + nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq); + pages = data->pages.pagevec; + while (!list_empty(head)) { + req = nfs_list_entry(head->next); + nfs_list_remove_request(req); + nfs_list_add_request(req, &hdr->pages); + *pages++ = req->wb_page; + } + + if ((desc->pg_ioflags & FLUSH_COND_STABLE) && + (desc->pg_moreio || nfs_reqs_to_commit(&cinfo))) + desc->pg_ioflags &= ~FLUSH_COND_STABLE; + + /* Set up the argument struct */ + nfs_pgio_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo); + hdr->data = data; + desc->pg_rpc_callops = &nfs_pgio_common_ops; + return 0; +} +EXPORT_SYMBOL_GPL(nfs_generic_pgio); + +static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc) +{ + struct nfs_rw_header *rw_hdr; + struct nfs_pgio_header *hdr; + int ret; + + rw_hdr = nfs_rw_header_alloc(desc->pg_rw_ops); + if (!rw_hdr) { + desc->pg_completion_ops->error_cleanup(&desc->pg_list); + return -ENOMEM; + } + hdr = &rw_hdr->header; + nfs_pgheader_init(desc, hdr, nfs_rw_header_free); + atomic_inc(&hdr->refcnt); + ret = nfs_generic_pgio(desc, hdr); + if (ret == 0) + ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode), + hdr->data, desc->pg_rpc_callops, + desc->pg_ioflags, 0); + if (atomic_dec_and_test(&hdr->refcnt)) + hdr->completion_ops->completion(hdr); + return ret; +} + +static bool nfs_match_open_context(const struct nfs_open_context *ctx1, + const struct nfs_open_context *ctx2) +{ + return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state; +} + +static bool nfs_match_lock_context(const struct nfs_lock_context *l1, + const struct nfs_lock_context *l2) +{ + return l1->lockowner.l_owner == l2->lockowner.l_owner + && l1->lockowner.l_pid == l2->lockowner.l_pid; } /** @@ -242,22 +830,27 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc, * * Return 'true' if this is the case, else return 'false'. */ -static int nfs_can_coalesce_requests(struct nfs_page *prev, - struct nfs_page *req) +static bool nfs_can_coalesce_requests(struct nfs_page *prev, + struct nfs_page *req, + struct nfs_pageio_descriptor *pgio) { - if (req->wb_context->cred != prev->wb_context->cred) - return 0; - if (req->wb_lock_context->lockowner != prev->wb_lock_context->lockowner) - return 0; - if (req->wb_context->state != prev->wb_context->state) - return 0; - if (req->wb_index != (prev->wb_index + 1)) - return 0; - if (req->wb_pgbase != 0) - return 0; - if (prev->wb_pgbase + prev->wb_bytes != PAGE_CACHE_SIZE) - return 0; - return 1; + size_t size; + + if (prev) { + if (!nfs_match_open_context(req->wb_context, prev->wb_context)) + return false; + if (req->wb_context->dentry->d_inode->i_flock != NULL && + !nfs_match_lock_context(req->wb_lock_context, + prev->wb_lock_context)) + return false; + if (req_offset(req) != req_offset(prev) + prev->wb_bytes) + return false; + } + size = pgio->pg_ops->pg_test(pgio, prev, req); + WARN_ON_ONCE(size > req->wb_bytes); + if (size && size < req->wb_bytes) + req->wb_bytes = size; + return size > 0; } /** @@ -271,31 +864,19 @@ static int nfs_can_coalesce_requests(struct nfs_page *prev, static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - size_t newlen = req->wb_bytes; - + struct nfs_page *prev = NULL; if (desc->pg_count != 0) { - struct nfs_page *prev; - - /* - * FIXME: ideally we should be able to coalesce all requests - * that are not block boundary aligned, but currently this - * is problematic for the case of bsize < PAGE_CACHE_SIZE, - * since nfs_flush_multi and nfs_pagein_multi assume you - * can have only one struct nfs_page. - */ - if (desc->pg_bsize < PAGE_SIZE) - return 0; - newlen += desc->pg_count; - if (newlen > desc->pg_bsize) - return 0; prev = nfs_list_entry(desc->pg_list.prev); - if (!nfs_can_coalesce_requests(prev, req)) - return 0; - } else + } else { + if (desc->pg_ops->pg_init) + desc->pg_ops->pg_init(desc, req); desc->pg_base = req->wb_pgbase; + } + if (!nfs_can_coalesce_requests(prev, req, desc)) + return 0; nfs_list_remove_request(req); nfs_list_add_request(req, &desc->pg_list); - desc->pg_count = newlen; + desc->pg_count += req->wb_bytes; return 1; } @@ -305,12 +886,7 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc, static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc) { if (!list_empty(&desc->pg_list)) { - int error = desc->pg_doio(desc->pg_inode, - &desc->pg_list, - nfs_page_array_len(desc->pg_base, - desc->pg_count), - desc->pg_count, - desc->pg_ioflags); + int error = desc->pg_ops->pg_doio(desc); if (error < 0) desc->pg_error = error; else @@ -327,28 +903,133 @@ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc) * @desc: destination io descriptor * @req: request * + * This may split a request into subrequests which are all part of the + * same page group. + * * Returns true if the request 'req' was successfully coalesced into the * existing list of pages 'desc'. */ -int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc, +static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc, struct nfs_page *req) { - while (!nfs_pageio_do_add_request(desc, req)) { - nfs_pageio_doio(desc); - if (desc->pg_error < 0) - return 0; - } + struct nfs_page *subreq; + unsigned int bytes_left = 0; + unsigned int offset, pgbase; + + nfs_page_group_lock(req); + + subreq = req; + bytes_left = subreq->wb_bytes; + offset = subreq->wb_offset; + pgbase = subreq->wb_pgbase; + + do { + if (!nfs_pageio_do_add_request(desc, subreq)) { + /* make sure pg_test call(s) did nothing */ + WARN_ON_ONCE(subreq->wb_bytes != bytes_left); + WARN_ON_ONCE(subreq->wb_offset != offset); + WARN_ON_ONCE(subreq->wb_pgbase != pgbase); + + nfs_page_group_unlock(req); + desc->pg_moreio = 1; + nfs_pageio_doio(desc); + if (desc->pg_error < 0) + return 0; + if (desc->pg_recoalesce) + return 0; + /* retry add_request for this subreq */ + nfs_page_group_lock(req); + continue; + } + + /* check for buggy pg_test call(s) */ + WARN_ON_ONCE(subreq->wb_bytes + subreq->wb_pgbase > PAGE_SIZE); + WARN_ON_ONCE(subreq->wb_bytes > bytes_left); + WARN_ON_ONCE(subreq->wb_bytes == 0); + + bytes_left -= subreq->wb_bytes; + offset += subreq->wb_bytes; + pgbase += subreq->wb_bytes; + + if (bytes_left) { + subreq = nfs_create_request(req->wb_context, + req->wb_page, + subreq, pgbase, bytes_left); + if (IS_ERR(subreq)) + goto err_ptr; + nfs_lock_request(subreq); + subreq->wb_offset = offset; + subreq->wb_index = req->wb_index; + } + } while (bytes_left > 0); + + nfs_page_group_unlock(req); return 1; +err_ptr: + desc->pg_error = PTR_ERR(subreq); + nfs_page_group_unlock(req); + return 0; } +static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc) +{ + LIST_HEAD(head); + + do { + list_splice_init(&desc->pg_list, &head); + desc->pg_bytes_written -= desc->pg_count; + desc->pg_count = 0; + desc->pg_base = 0; + desc->pg_recoalesce = 0; + desc->pg_moreio = 0; + + while (!list_empty(&head)) { + struct nfs_page *req; + + req = list_first_entry(&head, struct nfs_page, wb_list); + nfs_list_remove_request(req); + if (__nfs_pageio_add_request(desc, req)) + continue; + if (desc->pg_error < 0) + return 0; + break; + } + } while (desc->pg_recoalesce); + return 1; +} + +int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc, + struct nfs_page *req) +{ + int ret; + + do { + ret = __nfs_pageio_add_request(desc, req); + if (ret) + break; + if (desc->pg_error < 0) + break; + ret = nfs_do_recoalesce(desc); + } while (ret); + return ret; +} +EXPORT_SYMBOL_GPL(nfs_pageio_add_request); + /** * nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor * @desc: pointer to io descriptor */ void nfs_pageio_complete(struct nfs_pageio_descriptor *desc) { - nfs_pageio_doio(desc); + for (;;) { + nfs_pageio_doio(desc); + if (!desc->pg_recoalesce) + break; + if (!nfs_do_recoalesce(desc)) + break; + } } +EXPORT_SYMBOL_GPL(nfs_pageio_complete); /** * nfs_pageio_cond_complete - Conditional I/O completion @@ -366,68 +1047,8 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index) if (!list_empty(&desc->pg_list)) { struct nfs_page *prev = nfs_list_entry(desc->pg_list.prev); if (index != prev->wb_index + 1) - nfs_pageio_doio(desc); - } -} - -#define NFS_SCAN_MAXENTRIES 16 -/** - * nfs_scan_list - Scan a list for matching requests - * @nfsi: NFS inode - * @dst: Destination list - * @idx_start: lower bound of page->index to scan - * @npages: idx_start + npages sets the upper bound to scan. - * @tag: tag to scan for - * - * Moves elements from one of the inode request lists. - * If the number of requests is set to 0, the entire address_space - * starting at index idx_start, is scanned. - * The requests are *not* checked to ensure that they form a contiguous set. - * You must be holding the inode's i_lock when calling this function - */ -int nfs_scan_list(struct nfs_inode *nfsi, - struct list_head *dst, pgoff_t idx_start, - unsigned int npages, int tag) -{ - struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES]; - struct nfs_page *req; - pgoff_t idx_end; - int found, i; - int res; - - res = 0; - if (npages == 0) - idx_end = ~0; - else - idx_end = idx_start + npages - 1; - - for (;;) { - found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, - (void **)&pgvec[0], idx_start, - NFS_SCAN_MAXENTRIES, tag); - if (found <= 0) - break; - for (i = 0; i < found; i++) { - req = pgvec[i]; - if (req->wb_index > idx_end) - goto out; - idx_start = req->wb_index + 1; - if (nfs_set_page_tag_locked(req)) { - kref_get(&req->wb_kref); - nfs_list_remove_request(req); - radix_tree_tag_clear(&nfsi->nfs_page_tree, - req->wb_index, tag); - nfs_list_add_request(req, dst); - res++; - if (res == INT_MAX) - goto out; - } - } - /* for latency reduction */ - cond_resched_lock(&nfsi->vfs_inode.i_lock); + nfs_pageio_complete(desc); } -out: - return res; } int __init nfs_init_nfspagecache(void) @@ -447,3 +1068,13 @@ void nfs_destroy_nfspagecache(void) kmem_cache_destroy(nfs_page_cachep); } +static const struct rpc_call_ops nfs_pgio_common_ops = { + .rpc_call_prepare = nfs_pgio_prepare, + .rpc_call_done = nfs_pgio_result, + .rpc_release = nfs_pgio_release, +}; + +const struct nfs_pageio_ops nfs_pgio_rw_ops = { + .pg_test = nfs_generic_pg_test, + .pg_doio = nfs_generic_pg_pgios, +}; diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index db773428f95..6fdcd233d6f 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -28,10 +28,15 @@ */ #include <linux/nfs_fs.h> +#include <linux/nfs_page.h> +#include <linux/module.h> #include "internal.h" #include "pnfs.h" +#include "iostat.h" +#include "nfs4trace.h" #define NFSDBG_FACILITY NFSDBG_PNFS +#define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) /* Locking: * @@ -67,6 +72,10 @@ find_pnfs_driver(u32 id) spin_lock(&pnfs_spinlock); local = find_pnfs_driver_locked(id); + if (local != NULL && !try_module_get(local->owner)) { + dprintk("%s: Could not grab reference on module\n", __func__); + local = NULL; + } spin_unlock(&pnfs_spinlock); return local; } @@ -75,7 +84,11 @@ void unset_pnfs_layoutdriver(struct nfs_server *nfss) { if (nfss->pnfs_curr_ld) { - nfss->pnfs_curr_ld->clear_layoutdriver(nfss); + if (nfss->pnfs_curr_ld->clear_layoutdriver) + nfss->pnfs_curr_ld->clear_layoutdriver(nfss); + /* Decrement the MDS count. Purge the deviceid cache if zero */ + if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) + nfs4_deviceid_purge_client(nfss->nfs_client); module_put(nfss->pnfs_curr_ld->owner); } nfss->pnfs_curr_ld = NULL; @@ -88,7 +101,8 @@ unset_pnfs_layoutdriver(struct nfs_server *nfss) * @id layout type. Zero (illegal layout type) indicates pNFS not in use. */ void -set_pnfs_layoutdriver(struct nfs_server *server, u32 id) +set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, + u32 id) { struct pnfs_layoutdriver_type *ld_type = NULL; @@ -96,8 +110,8 @@ set_pnfs_layoutdriver(struct nfs_server *server, u32 id) goto out_no_driver; if (!(server->nfs_client->cl_exchange_flags & (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { - printk(KERN_ERR "%s: id %u cl_exchange_flags 0x%x\n", __func__, - id, server->nfs_client->cl_exchange_flags); + printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", + __func__, id, server->nfs_client->cl_exchange_flags); goto out_no_driver; } ld_type = find_pnfs_driver(id); @@ -110,18 +124,17 @@ set_pnfs_layoutdriver(struct nfs_server *server, u32 id) goto out_no_driver; } } - if (!try_module_get(ld_type->owner)) { - dprintk("%s: Could not grab reference on module\n", __func__); - goto out_no_driver; - } server->pnfs_curr_ld = ld_type; - if (ld_type->set_layoutdriver(server)) { - printk(KERN_ERR - "%s: Error initializing mount point for layout driver %u.\n", - __func__, id); + if (ld_type->set_layoutdriver + && ld_type->set_layoutdriver(server, mntfh)) { + printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " + "driver %u.\n", __func__, id); module_put(ld_type->owner); goto out_no_driver; } + /* Bump the MDS count */ + atomic_inc(&server->nfs_client->cl_mds_count); + dprintk("%s: pNFS module for %u set\n", __func__, id); return; @@ -137,11 +150,11 @@ pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) struct pnfs_layoutdriver_type *tmp; if (ld_type->id == 0) { - printk(KERN_ERR "%s id 0 is reserved\n", __func__); + printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); return status; } if (!ld_type->alloc_lseg || !ld_type->free_lseg) { - printk(KERN_ERR "%s Layout driver must provide " + printk(KERN_ERR "NFS: %s Layout driver must provide " "alloc_lseg and free_lseg.\n", __func__); return status; } @@ -154,7 +167,7 @@ pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, ld_type->name); } else { - printk(KERN_ERR "%s Module with id %d already loaded!\n", + printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", __func__, ld_type->id); } spin_unlock(&pnfs_spinlock); @@ -177,105 +190,304 @@ EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); * pNFS client layout cache */ -static void -get_layout_hdr_locked(struct pnfs_layout_hdr *lo) +/* Need to hold i_lock if caller does not already hold reference */ +void +pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) { - assert_spin_locked(&lo->inode->i_lock); - lo->refcount++; + atomic_inc(&lo->plh_refcount); +} + +static struct pnfs_layout_hdr * +pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) +{ + struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; + return ld->alloc_layout_hdr(ino, gfp_flags); } static void -put_layout_hdr_locked(struct pnfs_layout_hdr *lo) +pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) { - assert_spin_locked(&lo->inode->i_lock); - BUG_ON(lo->refcount == 0); + struct nfs_server *server = NFS_SERVER(lo->plh_inode); + struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; - lo->refcount--; - if (!lo->refcount) { - dprintk("%s: freeing layout cache %p\n", __func__, lo); - BUG_ON(!list_empty(&lo->layouts)); - NFS_I(lo->inode)->layout = NULL; - kfree(lo); + if (!list_empty(&lo->plh_layouts)) { + struct nfs_client *clp = server->nfs_client; + + spin_lock(&clp->cl_lock); + list_del_init(&lo->plh_layouts); + spin_unlock(&clp->cl_lock); } + put_rpccred(lo->plh_lc_cred); + return ld->free_layout_hdr(lo); +} + +static void +pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) +{ + struct nfs_inode *nfsi = NFS_I(lo->plh_inode); + dprintk("%s: freeing layout cache %p\n", __func__, lo); + nfsi->layout = NULL; + /* Reset MDS Threshold I/O counters */ + nfsi->write_io = 0; + nfsi->read_io = 0; } void -put_layout_hdr(struct inode *inode) +pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) +{ + struct inode *inode = lo->plh_inode; + + if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { + pnfs_detach_layout_hdr(lo); + spin_unlock(&inode->i_lock); + pnfs_free_layout_hdr(lo); + } +} + +static int +pnfs_iomode_to_fail_bit(u32 iomode) +{ + return iomode == IOMODE_RW ? + NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; +} + +static void +pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) +{ + lo->plh_retry_timestamp = jiffies; + if (!test_and_set_bit(fail_bit, &lo->plh_flags)) + atomic_inc(&lo->plh_refcount); +} + +static void +pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) +{ + if (test_and_clear_bit(fail_bit, &lo->plh_flags)) + atomic_dec(&lo->plh_refcount); +} + +static void +pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) { + struct inode *inode = lo->plh_inode; + struct pnfs_layout_range range = { + .iomode = iomode, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + LIST_HEAD(head); + spin_lock(&inode->i_lock); - put_layout_hdr_locked(NFS_I(inode)->layout); + pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); + pnfs_mark_matching_lsegs_invalid(lo, &head, &range); spin_unlock(&inode->i_lock); + pnfs_free_lseg_list(&head); + dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, + iomode == IOMODE_RW ? "RW" : "READ"); +} + +static bool +pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) +{ + unsigned long start, end; + int fail_bit = pnfs_iomode_to_fail_bit(iomode); + + if (test_bit(fail_bit, &lo->plh_flags) == 0) + return false; + end = jiffies; + start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; + if (!time_in_range(lo->plh_retry_timestamp, start, end)) { + /* It is time to retry the failed layoutgets */ + pnfs_layout_clear_fail_bit(lo, fail_bit); + return false; + } + return true; } static void init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) { - INIT_LIST_HEAD(&lseg->fi_list); - kref_init(&lseg->kref); - lseg->layout = lo; + INIT_LIST_HEAD(&lseg->pls_list); + INIT_LIST_HEAD(&lseg->pls_lc_list); + atomic_set(&lseg->pls_refcount, 1); + smp_mb(); + set_bit(NFS_LSEG_VALID, &lseg->pls_flags); + lseg->pls_layout = lo; } -/* Called without i_lock held, as the free_lseg call may sleep */ -static void -destroy_lseg(struct kref *kref) +static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) { - struct pnfs_layout_segment *lseg = - container_of(kref, struct pnfs_layout_segment, kref); - struct inode *ino = lseg->layout->inode; + struct inode *ino = lseg->pls_layout->plh_inode; - dprintk("--> %s\n", __func__); NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); - /* Matched by get_layout_hdr_locked in pnfs_insert_layout */ - put_layout_hdr(ino); } static void -put_lseg(struct pnfs_layout_segment *lseg) +pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, + struct pnfs_layout_segment *lseg) { + struct inode *inode = lo->plh_inode; + + WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); + list_del_init(&lseg->pls_list); + /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ + atomic_dec(&lo->plh_refcount); + if (list_empty(&lo->plh_segs)) + clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); + rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); +} + +void +pnfs_put_lseg(struct pnfs_layout_segment *lseg) +{ + struct pnfs_layout_hdr *lo; + struct inode *inode; + if (!lseg) return; - dprintk("%s: lseg %p ref %d\n", __func__, lseg, - atomic_read(&lseg->kref.refcount)); - kref_put(&lseg->kref, destroy_lseg); + dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, + atomic_read(&lseg->pls_refcount), + test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); + lo = lseg->pls_layout; + inode = lo->plh_inode; + if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { + pnfs_get_layout_hdr(lo); + pnfs_layout_remove_lseg(lo, lseg); + spin_unlock(&inode->i_lock); + pnfs_free_lseg(lseg); + pnfs_put_layout_hdr(lo); + } } +EXPORT_SYMBOL_GPL(pnfs_put_lseg); -static void -pnfs_clear_lseg_list(struct pnfs_layout_hdr *lo, struct list_head *tmp_list) +static u64 +end_offset(u64 start, u64 len) { - struct pnfs_layout_segment *lseg, *next; - struct nfs_client *clp; + u64 end; - dprintk("%s:Begin lo %p\n", __func__, lo); + end = start + len; + return end >= start ? end : NFS4_MAX_UINT64; +} - assert_spin_locked(&lo->inode->i_lock); - list_for_each_entry_safe(lseg, next, &lo->segs, fi_list) { - dprintk("%s: freeing lseg %p\n", __func__, lseg); - list_move(&lseg->fi_list, tmp_list); +/* + * is l2 fully contained in l1? + * start1 end1 + * [----------------------------------) + * start2 end2 + * [----------------) + */ +static bool +pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, + const struct pnfs_layout_range *l2) +{ + u64 start1 = l1->offset; + u64 end1 = end_offset(start1, l1->length); + u64 start2 = l2->offset; + u64 end2 = end_offset(start2, l2->length); + + return (start1 <= start2) && (end1 >= end2); +} + +/* + * is l1 and l2 intersecting? + * start1 end1 + * [----------------------------------) + * start2 end2 + * [----------------) + */ +static bool +pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, + const struct pnfs_layout_range *l2) +{ + u64 start1 = l1->offset; + u64 end1 = end_offset(start1, l1->length); + u64 start2 = l2->offset; + u64 end2 = end_offset(start2, l2->length); + + return (end1 == NFS4_MAX_UINT64 || end1 > start2) && + (end2 == NFS4_MAX_UINT64 || end2 > start1); +} + +static bool +should_free_lseg(const struct pnfs_layout_range *lseg_range, + const struct pnfs_layout_range *recall_range) +{ + return (recall_range->iomode == IOMODE_ANY || + lseg_range->iomode == recall_range->iomode) && + pnfs_lseg_range_intersecting(lseg_range, recall_range); +} + +static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, + struct list_head *tmp_list) +{ + if (!atomic_dec_and_test(&lseg->pls_refcount)) + return false; + pnfs_layout_remove_lseg(lseg->pls_layout, lseg); + list_add(&lseg->pls_list, tmp_list); + return true; +} + +/* Returns 1 if lseg is removed from list, 0 otherwise */ +static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, + struct list_head *tmp_list) +{ + int rv = 0; + + if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { + /* Remove the reference keeping the lseg in the + * list. It will now be removed when all + * outstanding io is finished. + */ + dprintk("%s: lseg %p ref %d\n", __func__, lseg, + atomic_read(&lseg->pls_refcount)); + if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) + rv = 1; } - clp = NFS_SERVER(lo->inode)->nfs_client; - spin_lock(&clp->cl_lock); - /* List does not take a reference, so no need for put here */ - list_del_init(&lo->layouts); - spin_unlock(&clp->cl_lock); - write_seqlock(&lo->seqlock); - clear_bit(NFS_LAYOUT_STATEID_SET, &lo->state); - write_sequnlock(&lo->seqlock); + return rv; +} - dprintk("%s:Return\n", __func__); +/* Returns count of number of matching invalid lsegs remaining in list + * after call. + */ +int +pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, + struct list_head *tmp_list, + struct pnfs_layout_range *recall_range) +{ + struct pnfs_layout_segment *lseg, *next; + int invalid = 0, removed = 0; + + dprintk("%s:Begin lo %p\n", __func__, lo); + + if (list_empty(&lo->plh_segs)) + return 0; + list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) + if (!recall_range || + should_free_lseg(&lseg->pls_range, recall_range)) { + dprintk("%s: freeing lseg %p iomode %d " + "offset %llu length %llu\n", __func__, + lseg, lseg->pls_range.iomode, lseg->pls_range.offset, + lseg->pls_range.length); + invalid++; + removed += mark_lseg_invalid(lseg, tmp_list); + } + dprintk("%s:Return %i\n", __func__, invalid - removed); + return invalid - removed; } -static void -pnfs_free_lseg_list(struct list_head *tmp_list) +/* note free_me must contain lsegs from a single layout_hdr */ +void +pnfs_free_lseg_list(struct list_head *free_me) { - struct pnfs_layout_segment *lseg; + struct pnfs_layout_segment *lseg, *tmp; - while (!list_empty(tmp_list)) { - lseg = list_entry(tmp_list->next, struct pnfs_layout_segment, - fi_list); - dprintk("%s calling put_lseg on %p\n", __func__, lseg); - list_del(&lseg->fi_list); - put_lseg(lseg); + if (list_empty(free_me)) + return; + + list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { + list_del(&lseg->pls_list); + pnfs_free_lseg(lseg); } } @@ -288,12 +500,147 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) spin_lock(&nfsi->vfs_inode.i_lock); lo = nfsi->layout; if (lo) { - pnfs_clear_lseg_list(lo, &tmp_list); - /* Matched by refcount set to 1 in alloc_init_layout_hdr */ - put_layout_hdr_locked(lo); + lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ + pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); + pnfs_get_layout_hdr(lo); + pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); + pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); + spin_unlock(&nfsi->vfs_inode.i_lock); + pnfs_free_lseg_list(&tmp_list); + pnfs_put_layout_hdr(lo); + } else + spin_unlock(&nfsi->vfs_inode.i_lock); +} +EXPORT_SYMBOL_GPL(pnfs_destroy_layout); + +static bool +pnfs_layout_add_bulk_destroy_list(struct inode *inode, + struct list_head *layout_list) +{ + struct pnfs_layout_hdr *lo; + bool ret = false; + + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { + pnfs_get_layout_hdr(lo); + list_add(&lo->plh_bulk_destroy, layout_list); + ret = true; } - spin_unlock(&nfsi->vfs_inode.i_lock); - pnfs_free_lseg_list(&tmp_list); + spin_unlock(&inode->i_lock); + return ret; +} + +/* Caller must hold rcu_read_lock and clp->cl_lock */ +static int +pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, + struct nfs_server *server, + struct list_head *layout_list) +{ + struct pnfs_layout_hdr *lo, *next; + struct inode *inode; + + list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { + inode = igrab(lo->plh_inode); + if (inode == NULL) + continue; + list_del_init(&lo->plh_layouts); + if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) + continue; + rcu_read_unlock(); + spin_unlock(&clp->cl_lock); + iput(inode); + spin_lock(&clp->cl_lock); + rcu_read_lock(); + return -EAGAIN; + } + return 0; +} + +static int +pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, + bool is_bulk_recall) +{ + struct pnfs_layout_hdr *lo; + struct inode *inode; + struct pnfs_layout_range range = { + .iomode = IOMODE_ANY, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + LIST_HEAD(lseg_list); + int ret = 0; + + while (!list_empty(layout_list)) { + lo = list_entry(layout_list->next, struct pnfs_layout_hdr, + plh_bulk_destroy); + dprintk("%s freeing layout for inode %lu\n", __func__, + lo->plh_inode->i_ino); + inode = lo->plh_inode; + spin_lock(&inode->i_lock); + list_del_init(&lo->plh_bulk_destroy); + lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ + if (is_bulk_recall) + set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); + if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) + ret = -EAGAIN; + spin_unlock(&inode->i_lock); + pnfs_free_lseg_list(&lseg_list); + pnfs_put_layout_hdr(lo); + iput(inode); + } + return ret; +} + +int +pnfs_destroy_layouts_byfsid(struct nfs_client *clp, + struct nfs_fsid *fsid, + bool is_recall) +{ + struct nfs_server *server; + LIST_HEAD(layout_list); + + spin_lock(&clp->cl_lock); + rcu_read_lock(); +restart: + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) + continue; + if (pnfs_layout_bulk_destroy_byserver_locked(clp, + server, + &layout_list) != 0) + goto restart; + } + rcu_read_unlock(); + spin_unlock(&clp->cl_lock); + + if (list_empty(&layout_list)) + return 0; + return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); +} + +int +pnfs_destroy_layouts_byclid(struct nfs_client *clp, + bool is_recall) +{ + struct nfs_server *server; + LIST_HEAD(layout_list); + + spin_lock(&clp->cl_lock); + rcu_read_lock(); +restart: + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + if (pnfs_layout_bulk_destroy_byserver_locked(clp, + server, + &layout_list) != 0) + goto restart; + } + rcu_read_unlock(); + spin_unlock(&clp->cl_lock); + + if (list_empty(&layout_list)) + return 0; + return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); } /* @@ -303,85 +650,100 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) void pnfs_destroy_all_layouts(struct nfs_client *clp) { - struct pnfs_layout_hdr *lo; - LIST_HEAD(tmp_list); - - spin_lock(&clp->cl_lock); - list_splice_init(&clp->cl_layouts, &tmp_list); - spin_unlock(&clp->cl_lock); + nfs4_deviceid_mark_client_invalid(clp); + nfs4_deviceid_purge_client(clp); - while (!list_empty(&tmp_list)) { - lo = list_entry(tmp_list.next, struct pnfs_layout_hdr, - layouts); - dprintk("%s freeing layout for inode %lu\n", __func__, - lo->inode->i_ino); - pnfs_destroy_layout(NFS_I(lo->inode)); - } + pnfs_destroy_layouts_byclid(clp, false); } -/* update lo->stateid with new if is more recent - * - * lo->stateid could be the open stateid, in which case we just use what given. +/* + * Compare 2 layout stateid sequence ids, to see which is newer, + * taking into account wraparound issues. */ -static void -pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, - const nfs4_stateid *new) +static bool pnfs_seqid_is_newer(u32 s1, u32 s2) { - nfs4_stateid *old = &lo->stateid; - bool overwrite = false; + return (s32)(s1 - s2) > 0; +} - write_seqlock(&lo->seqlock); - if (!test_bit(NFS_LAYOUT_STATEID_SET, &lo->state) || - memcmp(old->stateid.other, new->stateid.other, sizeof(new->stateid.other))) - overwrite = true; - else { - u32 oldseq, newseq; +static void +pnfs_verify_layout_stateid(struct pnfs_layout_hdr *lo, + const nfs4_stateid *new, + struct list_head *free_me_list) +{ + if (nfs4_stateid_match_other(&lo->plh_stateid, new)) + return; + /* Layout is new! Kill existing layout segments */ + pnfs_mark_matching_lsegs_invalid(lo, free_me_list, NULL); +} - oldseq = be32_to_cpu(old->stateid.seqid); - newseq = be32_to_cpu(new->stateid.seqid); - if ((int)(newseq - oldseq) > 0) - overwrite = true; +/* update lo->plh_stateid with new if is more recent */ +void +pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, + bool update_barrier) +{ + u32 oldseq, newseq, new_barrier; + int empty = list_empty(&lo->plh_segs); + + oldseq = be32_to_cpu(lo->plh_stateid.seqid); + newseq = be32_to_cpu(new->seqid); + if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { + nfs4_stateid_copy(&lo->plh_stateid, new); + if (update_barrier) { + new_barrier = be32_to_cpu(new->seqid); + } else { + /* Because of wraparound, we want to keep the barrier + * "close" to the current seqids. + */ + new_barrier = newseq - atomic_read(&lo->plh_outstanding); + } + if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) + lo->plh_barrier = new_barrier; } - if (overwrite) - memcpy(&old->stateid, &new->stateid, sizeof(new->stateid)); - write_sequnlock(&lo->seqlock); } -static void -pnfs_layout_from_open_stateid(struct pnfs_layout_hdr *lo, - struct nfs4_state *state) +static bool +pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, + const nfs4_stateid *stateid) { - int seq; + u32 seqid = be32_to_cpu(stateid->seqid); - dprintk("--> %s\n", __func__); - write_seqlock(&lo->seqlock); - do { - seq = read_seqbegin(&state->seqlock); - memcpy(lo->stateid.data, state->stateid.data, - sizeof(state->stateid.data)); - } while (read_seqretry(&state->seqlock, seq)); - set_bit(NFS_LAYOUT_STATEID_SET, &lo->state); - write_sequnlock(&lo->seqlock); - dprintk("<-- %s\n", __func__); + return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); } -void -pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, - struct nfs4_state *open_state) +/* lget is set to 1 if called from inside send_layoutget call chain */ +static bool +pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget) +{ + return lo->plh_block_lgets || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || + (list_empty(&lo->plh_segs) && + (atomic_read(&lo->plh_outstanding) > lget)); +} + +int +pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, + struct nfs4_state *open_state) { - int seq; + int status = 0; dprintk("--> %s\n", __func__); - do { - seq = read_seqbegin(&lo->seqlock); - if (!test_bit(NFS_LAYOUT_STATEID_SET, &lo->state)) { - /* This will trigger retry of the read */ - pnfs_layout_from_open_stateid(lo, open_state); - } else - memcpy(dst->data, lo->stateid.data, - sizeof(lo->stateid.data)); - } while (read_seqretry(&lo->seqlock, seq)); + spin_lock(&lo->plh_inode->i_lock); + if (pnfs_layoutgets_blocked(lo, 1)) { + status = -EAGAIN; + } else if (!nfs4_valid_open_stateid(open_state)) { + status = -EBADF; + } else if (list_empty(&lo->plh_segs)) { + int seq; + + do { + seq = read_seqbegin(&open_state->seqlock); + nfs4_stateid_copy(dst, &open_state->stateid); + } while (read_seqretry(&open_state->seqlock, seq)); + } else + nfs4_stateid_copy(dst, &lo->plh_stateid); + spin_unlock(&lo->plh_inode->i_lock); dprintk("<-- %s\n", __func__); + return status; } /* @@ -393,134 +755,342 @@ pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, static struct pnfs_layout_segment * send_layoutget(struct pnfs_layout_hdr *lo, struct nfs_open_context *ctx, - u32 iomode) + struct pnfs_layout_range *range, + gfp_t gfp_flags) { - struct inode *ino = lo->inode; + struct inode *ino = lo->plh_inode; struct nfs_server *server = NFS_SERVER(ino); struct nfs4_layoutget *lgp; - struct pnfs_layout_segment *lseg = NULL; + struct pnfs_layout_segment *lseg; dprintk("--> %s\n", __func__); - BUG_ON(ctx == NULL); - lgp = kzalloc(sizeof(*lgp), GFP_KERNEL); - if (lgp == NULL) { - put_layout_hdr(lo->inode); + lgp = kzalloc(sizeof(*lgp), gfp_flags); + if (lgp == NULL) return NULL; - } - lgp->args.minlength = NFS4_MAX_UINT64; + + lgp->args.minlength = PAGE_CACHE_SIZE; + if (lgp->args.minlength > range->length) + lgp->args.minlength = range->length; lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; - lgp->args.range.iomode = iomode; - lgp->args.range.offset = 0; - lgp->args.range.length = NFS4_MAX_UINT64; + lgp->args.range = *range; lgp->args.type = server->pnfs_curr_ld->id; lgp->args.inode = ino; lgp->args.ctx = get_nfs_open_context(ctx); - lgp->lsegpp = &lseg; + lgp->gfp_flags = gfp_flags; + lgp->cred = lo->plh_lc_cred; /* Synchronously retrieve layout information from server and * store in lseg. */ - nfs4_proc_layoutget(lgp); - if (!lseg) { - /* remember that LAYOUTGET failed and suspend trying */ - set_bit(lo_fail_bit(iomode), &lo->state); + lseg = nfs4_proc_layoutget(lgp, gfp_flags); + if (IS_ERR(lseg)) { + switch (PTR_ERR(lseg)) { + case -ENOMEM: + case -ERESTARTSYS: + break; + default: + /* remember that LAYOUTGET failed and suspend trying */ + pnfs_layout_io_set_failed(lo, range->iomode); + } + return NULL; } + return lseg; } +static void pnfs_clear_layoutcommit(struct inode *inode, + struct list_head *head) +{ + struct nfs_inode *nfsi = NFS_I(inode); + struct pnfs_layout_segment *lseg, *tmp; + + if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) + return; + list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { + if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) + continue; + pnfs_lseg_dec_and_remove_zero(lseg, head); + } +} + +/* + * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr + * when the layout segment list is empty. + * + * Note that a pnfs_layout_hdr can exist with an empty layout segment + * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the + * deviceid is marked invalid. + */ +int +_pnfs_return_layout(struct inode *ino) +{ + struct pnfs_layout_hdr *lo = NULL; + struct nfs_inode *nfsi = NFS_I(ino); + LIST_HEAD(tmp_list); + struct nfs4_layoutreturn *lrp; + nfs4_stateid stateid; + int status = 0, empty; + + dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); + + spin_lock(&ino->i_lock); + lo = nfsi->layout; + if (!lo) { + spin_unlock(&ino->i_lock); + dprintk("NFS: %s no layout to return\n", __func__); + goto out; + } + stateid = nfsi->layout->plh_stateid; + /* Reference matched in nfs4_layoutreturn_release */ + pnfs_get_layout_hdr(lo); + empty = list_empty(&lo->plh_segs); + pnfs_clear_layoutcommit(ino, &tmp_list); + pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); + /* Don't send a LAYOUTRETURN if list was initially empty */ + if (empty) { + spin_unlock(&ino->i_lock); + pnfs_put_layout_hdr(lo); + dprintk("NFS: %s no layout segments to return\n", __func__); + goto out; + } + lo->plh_block_lgets++; + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&tmp_list); + + lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); + if (unlikely(lrp == NULL)) { + status = -ENOMEM; + spin_lock(&ino->i_lock); + lo->plh_block_lgets--; + spin_unlock(&ino->i_lock); + pnfs_put_layout_hdr(lo); + goto out; + } + + lrp->args.stateid = stateid; + lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; + lrp->args.inode = ino; + lrp->args.layout = lo; + lrp->clp = NFS_SERVER(ino)->nfs_client; + lrp->cred = lo->plh_lc_cred; + + status = nfs4_proc_layoutreturn(lrp); +out: + dprintk("<-- %s status: %d\n", __func__, status); + return status; +} +EXPORT_SYMBOL_GPL(_pnfs_return_layout); + +int +pnfs_commit_and_return_layout(struct inode *inode) +{ + struct pnfs_layout_hdr *lo; + int ret; + + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (lo == NULL) { + spin_unlock(&inode->i_lock); + return 0; + } + pnfs_get_layout_hdr(lo); + /* Block new layoutgets and read/write to ds */ + lo->plh_block_lgets++; + spin_unlock(&inode->i_lock); + filemap_fdatawait(inode->i_mapping); + ret = pnfs_layoutcommit_inode(inode, true); + if (ret == 0) + ret = _pnfs_return_layout(inode); + spin_lock(&inode->i_lock); + lo->plh_block_lgets--; + spin_unlock(&inode->i_lock); + pnfs_put_layout_hdr(lo); + return ret; +} + +bool pnfs_roc(struct inode *ino) +{ + struct pnfs_layout_hdr *lo; + struct pnfs_layout_segment *lseg, *tmp; + LIST_HEAD(tmp_list); + bool found = false; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) + goto out_nolayout; + list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) + if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { + mark_lseg_invalid(lseg, &tmp_list); + found = true; + } + if (!found) + goto out_nolayout; + lo->plh_block_lgets++; + pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&tmp_list); + return true; + +out_nolayout: + spin_unlock(&ino->i_lock); + return false; +} + +void pnfs_roc_release(struct inode *ino) +{ + struct pnfs_layout_hdr *lo; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + lo->plh_block_lgets--; + if (atomic_dec_and_test(&lo->plh_refcount)) { + pnfs_detach_layout_hdr(lo); + spin_unlock(&ino->i_lock); + pnfs_free_layout_hdr(lo); + } else + spin_unlock(&ino->i_lock); +} + +void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) +{ + struct pnfs_layout_hdr *lo; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) + lo->plh_barrier = barrier; + spin_unlock(&ino->i_lock); +} + +bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) +{ + struct nfs_inode *nfsi = NFS_I(ino); + struct pnfs_layout_hdr *lo; + struct pnfs_layout_segment *lseg; + u32 current_seqid; + bool found = false; + + spin_lock(&ino->i_lock); + list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) + if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { + rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); + found = true; + goto out; + } + lo = nfsi->layout; + current_seqid = be32_to_cpu(lo->plh_stateid.seqid); + + /* Since close does not return a layout stateid for use as + * a barrier, we choose the worst-case barrier. + */ + *barrier = current_seqid + atomic_read(&lo->plh_outstanding); +out: + spin_unlock(&ino->i_lock); + return found; +} + /* * Compare two layout segments for sorting into layout cache. * We want to preferentially return RW over RO layouts, so ensure those * are seen first. */ static s64 -cmp_layout(u32 iomode1, u32 iomode2) +pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, + const struct pnfs_layout_range *l2) { + s64 d; + + /* high offset > low offset */ + d = l1->offset - l2->offset; + if (d) + return d; + + /* short length > long length */ + d = l2->length - l1->length; + if (d) + return d; + /* read > read/write */ - return (int)(iomode2 == IOMODE_READ) - (int)(iomode1 == IOMODE_READ); + return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); } static void -pnfs_insert_layout(struct pnfs_layout_hdr *lo, +pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) { struct pnfs_layout_segment *lp; - int found = 0; dprintk("%s:Begin\n", __func__); - assert_spin_locked(&lo->inode->i_lock); - if (list_empty(&lo->segs)) { - struct nfs_client *clp = NFS_SERVER(lo->inode)->nfs_client; - - spin_lock(&clp->cl_lock); - BUG_ON(!list_empty(&lo->layouts)); - list_add_tail(&lo->layouts, &clp->cl_layouts); - spin_unlock(&clp->cl_lock); - } - list_for_each_entry(lp, &lo->segs, fi_list) { - if (cmp_layout(lp->range.iomode, lseg->range.iomode) > 0) + list_for_each_entry(lp, &lo->plh_segs, pls_list) { + if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) continue; - list_add_tail(&lseg->fi_list, &lp->fi_list); + list_add_tail(&lseg->pls_list, &lp->pls_list); dprintk("%s: inserted lseg %p " "iomode %d offset %llu length %llu before " "lp %p iomode %d offset %llu length %llu\n", - __func__, lseg, lseg->range.iomode, - lseg->range.offset, lseg->range.length, - lp, lp->range.iomode, lp->range.offset, - lp->range.length); - found = 1; - break; - } - if (!found) { - list_add_tail(&lseg->fi_list, &lo->segs); - dprintk("%s: inserted lseg %p " - "iomode %d offset %llu length %llu at tail\n", - __func__, lseg, lseg->range.iomode, - lseg->range.offset, lseg->range.length); + __func__, lseg, lseg->pls_range.iomode, + lseg->pls_range.offset, lseg->pls_range.length, + lp, lp->pls_range.iomode, lp->pls_range.offset, + lp->pls_range.length); + goto out; } - get_layout_hdr_locked(lo); + list_add_tail(&lseg->pls_list, &lo->plh_segs); + dprintk("%s: inserted lseg %p " + "iomode %d offset %llu length %llu at tail\n", + __func__, lseg, lseg->pls_range.iomode, + lseg->pls_range.offset, lseg->pls_range.length); +out: + pnfs_get_layout_hdr(lo); dprintk("%s:Return\n", __func__); } static struct pnfs_layout_hdr * -alloc_init_layout_hdr(struct inode *ino) +alloc_init_layout_hdr(struct inode *ino, + struct nfs_open_context *ctx, + gfp_t gfp_flags) { struct pnfs_layout_hdr *lo; - lo = kzalloc(sizeof(struct pnfs_layout_hdr), GFP_KERNEL); + lo = pnfs_alloc_layout_hdr(ino, gfp_flags); if (!lo) return NULL; - lo->refcount = 1; - INIT_LIST_HEAD(&lo->layouts); - INIT_LIST_HEAD(&lo->segs); - seqlock_init(&lo->seqlock); - lo->inode = ino; + atomic_set(&lo->plh_refcount, 1); + INIT_LIST_HEAD(&lo->plh_layouts); + INIT_LIST_HEAD(&lo->plh_segs); + INIT_LIST_HEAD(&lo->plh_bulk_destroy); + lo->plh_inode = ino; + lo->plh_lc_cred = get_rpccred(ctx->cred); return lo; } static struct pnfs_layout_hdr * -pnfs_find_alloc_layout(struct inode *ino) +pnfs_find_alloc_layout(struct inode *ino, + struct nfs_open_context *ctx, + gfp_t gfp_flags) { struct nfs_inode *nfsi = NFS_I(ino); struct pnfs_layout_hdr *new = NULL; dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); - assert_spin_locked(&ino->i_lock); - if (nfsi->layout) - return nfsi->layout; - + if (nfsi->layout != NULL) + goto out_existing; spin_unlock(&ino->i_lock); - new = alloc_init_layout_hdr(ino); + new = alloc_init_layout_hdr(ino, ctx, gfp_flags); spin_lock(&ino->i_lock); - if (likely(nfsi->layout == NULL)) /* Won the race? */ + if (likely(nfsi->layout == NULL)) { /* Won the race? */ nfsi->layout = new; - else - kfree(new); + return new; + } else if (new != NULL) + pnfs_free_layout_hdr(new); +out_existing: + pnfs_get_layout_hdr(nfsi->layout); return nfsi->layout; } @@ -535,34 +1105,121 @@ pnfs_find_alloc_layout(struct inode *ino) * READ READ true * READ RW true */ -static int -is_matching_lseg(struct pnfs_layout_segment *lseg, u32 iomode) +static bool +pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, + const struct pnfs_layout_range *range) { - return (iomode != IOMODE_RW || lseg->range.iomode == IOMODE_RW); + struct pnfs_layout_range range1; + + if ((range->iomode == IOMODE_RW && + ls_range->iomode != IOMODE_RW) || + !pnfs_lseg_range_intersecting(ls_range, range)) + return 0; + + /* range1 covers only the first byte in the range */ + range1 = *range; + range1.length = 1; + return pnfs_lseg_range_contained(ls_range, &range1); } /* * lookup range in layout */ static struct pnfs_layout_segment * -pnfs_has_layout(struct pnfs_layout_hdr *lo, u32 iomode) +pnfs_find_lseg(struct pnfs_layout_hdr *lo, + struct pnfs_layout_range *range) { struct pnfs_layout_segment *lseg, *ret = NULL; dprintk("%s:Begin\n", __func__); - assert_spin_locked(&lo->inode->i_lock); - list_for_each_entry(lseg, &lo->segs, fi_list) { - if (is_matching_lseg(lseg, iomode)) { - ret = lseg; + list_for_each_entry(lseg, &lo->plh_segs, pls_list) { + if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && + pnfs_lseg_range_match(&lseg->pls_range, range)) { + ret = pnfs_get_lseg(lseg); break; } - if (cmp_layout(iomode, lseg->range.iomode) > 0) + if (lseg->pls_range.offset > range->offset) break; } dprintk("%s:Return lseg %p ref %d\n", - __func__, ret, ret ? atomic_read(&ret->kref.refcount) : 0); + __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); + return ret; +} + +/* + * Use mdsthreshold hints set at each OPEN to determine if I/O should go + * to the MDS or over pNFS + * + * The nfs_inode read_io and write_io fields are cumulative counters reset + * when there are no layout segments. Note that in pnfs_update_layout iomode + * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a + * WRITE request. + * + * A return of true means use MDS I/O. + * + * From rfc 5661: + * If a file's size is smaller than the file size threshold, data accesses + * SHOULD be sent to the metadata server. If an I/O request has a length that + * is below the I/O size threshold, the I/O SHOULD be sent to the metadata + * server. If both file size and I/O size are provided, the client SHOULD + * reach or exceed both thresholds before sending its read or write + * requests to the data server. + */ +static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, + struct inode *ino, int iomode) +{ + struct nfs4_threshold *t = ctx->mdsthreshold; + struct nfs_inode *nfsi = NFS_I(ino); + loff_t fsize = i_size_read(ino); + bool size = false, size_set = false, io = false, io_set = false, ret = false; + + if (t == NULL) + return ret; + + dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", + __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); + + switch (iomode) { + case IOMODE_READ: + if (t->bm & THRESHOLD_RD) { + dprintk("%s fsize %llu\n", __func__, fsize); + size_set = true; + if (fsize < t->rd_sz) + size = true; + } + if (t->bm & THRESHOLD_RD_IO) { + dprintk("%s nfsi->read_io %llu\n", __func__, + nfsi->read_io); + io_set = true; + if (nfsi->read_io < t->rd_io_sz) + io = true; + } + break; + case IOMODE_RW: + if (t->bm & THRESHOLD_WR) { + dprintk("%s fsize %llu\n", __func__, fsize); + size_set = true; + if (fsize < t->wr_sz) + size = true; + } + if (t->bm & THRESHOLD_WR_IO) { + dprintk("%s nfsi->write_io %llu\n", __func__, + nfsi->write_io); + io_set = true; + if (nfsi->write_io < t->wr_io_sz) + io = true; + } + break; + } + if (size_set && io_set) { + if (size && io) + ret = true; + } else if (size || io) + ret = true; + + dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); return ret; } @@ -573,57 +1230,107 @@ pnfs_has_layout(struct pnfs_layout_hdr *lo, u32 iomode) struct pnfs_layout_segment * pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, - enum pnfs_iomode iomode) + loff_t pos, + u64 count, + enum pnfs_iomode iomode, + gfp_t gfp_flags) { - struct nfs_inode *nfsi = NFS_I(ino); + struct pnfs_layout_range arg = { + .iomode = iomode, + .offset = pos, + .length = count, + }; + unsigned pg_offset; + struct nfs_server *server = NFS_SERVER(ino); + struct nfs_client *clp = server->nfs_client; struct pnfs_layout_hdr *lo; struct pnfs_layout_segment *lseg = NULL; + bool first; if (!pnfs_enabled_sb(NFS_SERVER(ino))) - return NULL; + goto out; + + if (pnfs_within_mdsthreshold(ctx, ino, iomode)) + goto out; + spin_lock(&ino->i_lock); - lo = pnfs_find_alloc_layout(ino); + lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); if (lo == NULL) { - dprintk("%s ERROR: can't get pnfs_layout_hdr\n", __func__); - goto out_unlock; + spin_unlock(&ino->i_lock); + goto out; } - /* Check to see if the layout for the given range already exists */ - lseg = pnfs_has_layout(lo, iomode); - if (lseg) { - dprintk("%s: Using cached lseg %p for iomode %d)\n", - __func__, lseg, iomode); + /* Do we even need to bother with this? */ + if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { + dprintk("%s matches recall, use MDS\n", __func__); goto out_unlock; } /* if LAYOUTGET already failed once we don't try again */ - if (test_bit(lo_fail_bit(iomode), &nfsi->layout->state)) + if (pnfs_layout_io_test_failed(lo, iomode)) + goto out_unlock; + + /* Check to see if the layout for the given range already exists */ + lseg = pnfs_find_lseg(lo, &arg); + if (lseg) + goto out_unlock; + + if (pnfs_layoutgets_blocked(lo, 0)) goto out_unlock; + atomic_inc(&lo->plh_outstanding); - get_layout_hdr_locked(lo); /* Matched in nfs4_layoutget_release */ + first = list_empty(&lo->plh_layouts) ? true : false; spin_unlock(&ino->i_lock); - lseg = send_layoutget(lo, ctx, iomode); + if (first) { + /* The lo must be on the clp list if there is any + * chance of a CB_LAYOUTRECALL(FILE) coming in. + */ + spin_lock(&clp->cl_lock); + list_add_tail(&lo->plh_layouts, &server->layouts); + spin_unlock(&clp->cl_lock); + } + + pg_offset = arg.offset & ~PAGE_CACHE_MASK; + if (pg_offset) { + arg.offset -= pg_offset; + arg.length += pg_offset; + } + if (arg.length != NFS4_MAX_UINT64) + arg.length = PAGE_CACHE_ALIGN(arg.length); + + lseg = send_layoutget(lo, ctx, &arg, gfp_flags); + atomic_dec(&lo->plh_outstanding); +out_put_layout_hdr: + pnfs_put_layout_hdr(lo); out: - dprintk("%s end, state 0x%lx lseg %p\n", __func__, - nfsi->layout->state, lseg); + dprintk("%s: inode %s/%llu pNFS layout segment %s for " + "(%s, offset: %llu, length: %llu)\n", + __func__, ino->i_sb->s_id, + (unsigned long long)NFS_FILEID(ino), + lseg == NULL ? "not found" : "found", + iomode==IOMODE_RW ? "read/write" : "read-only", + (unsigned long long)pos, + (unsigned long long)count); return lseg; out_unlock: spin_unlock(&ino->i_lock); - goto out; + goto out_put_layout_hdr; } +EXPORT_SYMBOL_GPL(pnfs_update_layout); -int +struct pnfs_layout_segment * pnfs_layout_process(struct nfs4_layoutget *lgp) { struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; struct nfs4_layoutget_res *res = &lgp->res; struct pnfs_layout_segment *lseg; - struct inode *ino = lo->inode; + struct inode *ino = lo->plh_inode; + LIST_HEAD(free_me); int status = 0; /* Inject layout blob into I/O device driver */ - lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res); + lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); if (!lseg || IS_ERR(lseg)) { if (!lseg) status = -ENOMEM; @@ -635,149 +1342,607 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) } spin_lock(&ino->i_lock); - init_lseg(lo, lseg); - lseg->range = res->range; - *lgp->lsegpp = lseg; - pnfs_insert_layout(lo, lseg); + if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { + dprintk("%s forget reply due to recall\n", __func__); + goto out_forget_reply; + } + + if (pnfs_layoutgets_blocked(lo, 1) || + pnfs_layout_stateid_blocked(lo, &res->stateid)) { + dprintk("%s forget reply due to state\n", __func__); + goto out_forget_reply; + } + /* Check that the new stateid matches the old stateid */ + pnfs_verify_layout_stateid(lo, &res->stateid, &free_me); /* Done processing layoutget. Set the layout stateid */ - pnfs_set_layout_stateid(lo, &res->stateid); + pnfs_set_layout_stateid(lo, &res->stateid, false); + + init_lseg(lo, lseg); + lseg->pls_range = res->range; + pnfs_get_lseg(lseg); + pnfs_layout_insert_lseg(lo, lseg); + + if (res->return_on_close) { + set_bit(NFS_LSEG_ROC, &lseg->pls_flags); + set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); + } + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&free_me); + return lseg; out: - return status; + return ERR_PTR(status); + +out_forget_reply: + spin_unlock(&ino->i_lock); + lseg->pls_layout = lo; + NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); + goto out; } +void +pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) +{ + u64 rd_size = req->wb_bytes; + + WARN_ON_ONCE(pgio->pg_lseg != NULL); + + if (pgio->pg_dreq == NULL) + rd_size = i_size_read(pgio->pg_inode) - req_offset(req); + else + rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); + + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + req_offset(req), + rd_size, + IOMODE_READ, + GFP_KERNEL); + /* If no lseg, fall back to read through mds */ + if (pgio->pg_lseg == NULL) + nfs_pageio_reset_read_mds(pgio); + +} +EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); + +void +pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req, u64 wb_size) +{ + WARN_ON_ONCE(pgio->pg_lseg != NULL); + + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + req_offset(req), + wb_size, + IOMODE_RW, + GFP_NOFS); + /* If no lseg, fall back to write through mds */ + if (pgio->pg_lseg == NULL) + nfs_pageio_reset_write_mds(pgio); +} +EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); + /* - * Device ID cache. Currently supports one layout type per struct nfs_client. - * Add layout type to the lookup key to expand to support multiple types. + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. */ -int -pnfs_alloc_init_deviceid_cache(struct nfs_client *clp, - void (*free_callback)(struct pnfs_deviceid_node *)) +size_t +pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, + struct nfs_page *req) +{ + unsigned int size; + u64 seg_end, req_start, seg_left; + + size = nfs_generic_pg_test(pgio, prev, req); + if (!size) + return 0; + + /* + * 'size' contains the number of bytes left in the current page (up + * to the original size asked for in @req->wb_bytes). + * + * Calculate how many bytes are left in the layout segment + * and if there are less bytes than 'size', return that instead. + * + * Please also note that 'end_offset' is actually the offset of the + * first byte that lies outside the pnfs_layout_range. FIXME? + * + */ + if (pgio->pg_lseg) { + seg_end = end_offset(pgio->pg_lseg->pls_range.offset, + pgio->pg_lseg->pls_range.length); + req_start = req_offset(req); + WARN_ON_ONCE(req_start > seg_end); + /* start of request is past the last byte of this segment */ + if (req_start >= seg_end) + return 0; + + /* adjust 'size' iff there are fewer bytes left in the + * segment than what nfs_generic_pg_test returned */ + seg_left = seg_end - req_start; + if (seg_left < size) + size = (unsigned int)seg_left; + } + + return size; +} +EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); + +int pnfs_write_done_resend_to_mds(struct inode *inode, + struct list_head *head, + const struct nfs_pgio_completion_ops *compl_ops, + struct nfs_direct_req *dreq) { - struct pnfs_deviceid_cache *c; + struct nfs_pageio_descriptor pgio; + LIST_HEAD(failed); + + /* Resend all requests through the MDS */ + nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, true, compl_ops); + pgio.pg_dreq = dreq; + while (!list_empty(head)) { + struct nfs_page *req = nfs_list_entry(head->next); + + nfs_list_remove_request(req); + if (!nfs_pageio_add_request(&pgio, req)) + nfs_list_add_request(req, &failed); + } + nfs_pageio_complete(&pgio); + + if (!list_empty(&failed)) { + /* For some reason our attempt to resend pages. Mark the + * overall send request as having failed, and let + * nfs_writeback_release_full deal with the error. + */ + list_move(&failed, head); + return -EIO; + } + return 0; +} +EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); + +static void pnfs_ld_handle_write_error(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; - c = kzalloc(sizeof(struct pnfs_deviceid_cache), GFP_KERNEL); - if (!c) + dprintk("pnfs write error = %d\n", hdr->pnfs_error); + if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & + PNFS_LAYOUTRET_ON_ERROR) { + pnfs_return_layout(hdr->inode); + } + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) + data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode, + &hdr->pages, + hdr->completion_ops, + hdr->dreq); +} + +/* + * Called by non rpc-based layout drivers + */ +void pnfs_ld_write_done(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + + trace_nfs4_pnfs_write(data, hdr->pnfs_error); + if (!hdr->pnfs_error) { + pnfs_set_layoutcommit(data); + hdr->mds_ops->rpc_call_done(&data->task, data); + } else + pnfs_ld_handle_write_error(data); + hdr->mds_ops->rpc_release(data); +} +EXPORT_SYMBOL_GPL(pnfs_ld_write_done); + +static void +pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { + list_splice_tail_init(&hdr->pages, &desc->pg_list); + nfs_pageio_reset_write_mds(desc); + desc->pg_recoalesce = 1; + } + nfs_pgio_data_release(data); +} + +static enum pnfs_try_status +pnfs_try_to_write_data(struct nfs_pgio_data *wdata, + const struct rpc_call_ops *call_ops, + struct pnfs_layout_segment *lseg, + int how) +{ + struct nfs_pgio_header *hdr = wdata->header; + struct inode *inode = hdr->inode; + enum pnfs_try_status trypnfs; + struct nfs_server *nfss = NFS_SERVER(inode); + + hdr->mds_ops = call_ops; + + dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, + inode->i_ino, wdata->args.count, wdata->args.offset, how); + trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); + if (trypnfs != PNFS_NOT_ATTEMPTED) + nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); + dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); + return trypnfs; +} + +static void +pnfs_do_write(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_header *hdr, int how) +{ + struct nfs_pgio_data *data = hdr->data; + const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; + struct pnfs_layout_segment *lseg = desc->pg_lseg; + enum pnfs_try_status trypnfs; + + desc->pg_lseg = NULL; + trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how); + if (trypnfs == PNFS_NOT_ATTEMPTED) + pnfs_write_through_mds(desc, data); + pnfs_put_lseg(lseg); +} + +static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) +{ + pnfs_put_lseg(hdr->lseg); + nfs_rw_header_free(hdr); +} +EXPORT_SYMBOL_GPL(pnfs_writehdr_free); + +int +pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) +{ + struct nfs_rw_header *whdr; + struct nfs_pgio_header *hdr; + int ret; + + whdr = nfs_rw_header_alloc(desc->pg_rw_ops); + if (!whdr) { + desc->pg_completion_ops->error_cleanup(&desc->pg_list); + pnfs_put_lseg(desc->pg_lseg); + desc->pg_lseg = NULL; return -ENOMEM; - spin_lock(&clp->cl_lock); - if (clp->cl_devid_cache != NULL) { - atomic_inc(&clp->cl_devid_cache->dc_ref); - dprintk("%s [kref [%d]]\n", __func__, - atomic_read(&clp->cl_devid_cache->dc_ref)); - kfree(c); - } else { - /* kzalloc initializes hlists */ - spin_lock_init(&c->dc_lock); - atomic_set(&c->dc_ref, 1); - c->dc_free_callback = free_callback; - clp->cl_devid_cache = c; - dprintk("%s [new]\n", __func__); } - spin_unlock(&clp->cl_lock); + hdr = &whdr->header; + nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); + hdr->lseg = pnfs_get_lseg(desc->pg_lseg); + atomic_inc(&hdr->refcnt); + ret = nfs_generic_pgio(desc, hdr); + if (ret != 0) { + pnfs_put_lseg(desc->pg_lseg); + desc->pg_lseg = NULL; + } else + pnfs_do_write(desc, hdr, desc->pg_ioflags); + if (atomic_dec_and_test(&hdr->refcnt)) + hdr->completion_ops->completion(hdr); + return ret; +} +EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); + +int pnfs_read_done_resend_to_mds(struct inode *inode, + struct list_head *head, + const struct nfs_pgio_completion_ops *compl_ops, + struct nfs_direct_req *dreq) +{ + struct nfs_pageio_descriptor pgio; + LIST_HEAD(failed); + + /* Resend all requests through the MDS */ + nfs_pageio_init_read(&pgio, inode, true, compl_ops); + pgio.pg_dreq = dreq; + while (!list_empty(head)) { + struct nfs_page *req = nfs_list_entry(head->next); + + nfs_list_remove_request(req); + if (!nfs_pageio_add_request(&pgio, req)) + nfs_list_add_request(req, &failed); + } + nfs_pageio_complete(&pgio); + + if (!list_empty(&failed)) { + list_move(&failed, head); + return -EIO; + } return 0; } -EXPORT_SYMBOL_GPL(pnfs_alloc_init_deviceid_cache); +EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); + +static void pnfs_ld_handle_read_error(struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; + + dprintk("pnfs read error = %d\n", hdr->pnfs_error); + if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & + PNFS_LAYOUTRET_ON_ERROR) { + pnfs_return_layout(hdr->inode); + } + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) + data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode, + &hdr->pages, + hdr->completion_ops, + hdr->dreq); +} /* - * Called from pnfs_layoutdriver_type->free_lseg - * last layout segment reference frees deviceid + * Called by non rpc-based layout drivers */ -void -pnfs_put_deviceid(struct pnfs_deviceid_cache *c, - struct pnfs_deviceid_node *devid) +void pnfs_ld_read_done(struct nfs_pgio_data *data) { - struct nfs4_deviceid *id = &devid->de_id; - struct pnfs_deviceid_node *d; - struct hlist_node *n; - long h = nfs4_deviceid_hash(id); + struct nfs_pgio_header *hdr = data->header; + + trace_nfs4_pnfs_read(data, hdr->pnfs_error); + if (likely(!hdr->pnfs_error)) { + __nfs4_read_done_cb(data); + hdr->mds_ops->rpc_call_done(&data->task, data); + } else + pnfs_ld_handle_read_error(data); + hdr->mds_ops->rpc_release(data); +} +EXPORT_SYMBOL_GPL(pnfs_ld_read_done); - dprintk("%s [%d]\n", __func__, atomic_read(&devid->de_ref)); - if (!atomic_dec_and_lock(&devid->de_ref, &c->dc_lock)) - return; +static void +pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, + struct nfs_pgio_data *data) +{ + struct nfs_pgio_header *hdr = data->header; - hlist_for_each_entry_rcu(d, n, &c->dc_deviceids[h], de_node) - if (!memcmp(&d->de_id, id, sizeof(*id))) { - hlist_del_rcu(&d->de_node); - spin_unlock(&c->dc_lock); - synchronize_rcu(); - c->dc_free_callback(devid); - return; - } - spin_unlock(&c->dc_lock); - /* Why wasn't it found in the list? */ - BUG(); + if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { + list_splice_tail_init(&hdr->pages, &desc->pg_list); + nfs_pageio_reset_read_mds(desc); + desc->pg_recoalesce = 1; + } + nfs_pgio_data_release(data); +} + +/* + * Call the appropriate parallel I/O subsystem read function. + */ +static enum pnfs_try_status +pnfs_try_to_read_data(struct nfs_pgio_data *rdata, + const struct rpc_call_ops *call_ops, + struct pnfs_layout_segment *lseg) +{ + struct nfs_pgio_header *hdr = rdata->header; + struct inode *inode = hdr->inode; + struct nfs_server *nfss = NFS_SERVER(inode); + enum pnfs_try_status trypnfs; + + hdr->mds_ops = call_ops; + + dprintk("%s: Reading ino:%lu %u@%llu\n", + __func__, inode->i_ino, rdata->args.count, rdata->args.offset); + + trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); + if (trypnfs != PNFS_NOT_ATTEMPTED) + nfs_inc_stats(inode, NFSIOS_PNFS_READ); + dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); + return trypnfs; } -EXPORT_SYMBOL_GPL(pnfs_put_deviceid); -/* Find and reference a deviceid */ -struct pnfs_deviceid_node * -pnfs_find_get_deviceid(struct pnfs_deviceid_cache *c, struct nfs4_deviceid *id) +static void +pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { - struct pnfs_deviceid_node *d; - struct hlist_node *n; - long hash = nfs4_deviceid_hash(id); + struct nfs_pgio_data *data = hdr->data; + const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; + struct pnfs_layout_segment *lseg = desc->pg_lseg; + enum pnfs_try_status trypnfs; + + desc->pg_lseg = NULL; + trypnfs = pnfs_try_to_read_data(data, call_ops, lseg); + if (trypnfs == PNFS_NOT_ATTEMPTED) + pnfs_read_through_mds(desc, data); + pnfs_put_lseg(lseg); +} - dprintk("--> %s hash %ld\n", __func__, hash); - rcu_read_lock(); - hlist_for_each_entry_rcu(d, n, &c->dc_deviceids[hash], de_node) { - if (!memcmp(&d->de_id, id, sizeof(*id))) { - if (!atomic_inc_not_zero(&d->de_ref)) { - goto fail; - } else { - rcu_read_unlock(); - return d; - } - } +static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) +{ + pnfs_put_lseg(hdr->lseg); + nfs_rw_header_free(hdr); +} +EXPORT_SYMBOL_GPL(pnfs_readhdr_free); + +int +pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) +{ + struct nfs_rw_header *rhdr; + struct nfs_pgio_header *hdr; + int ret; + + rhdr = nfs_rw_header_alloc(desc->pg_rw_ops); + if (!rhdr) { + desc->pg_completion_ops->error_cleanup(&desc->pg_list); + ret = -ENOMEM; + pnfs_put_lseg(desc->pg_lseg); + desc->pg_lseg = NULL; + return ret; } -fail: - rcu_read_unlock(); - return NULL; + hdr = &rhdr->header; + nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); + hdr->lseg = pnfs_get_lseg(desc->pg_lseg); + atomic_inc(&hdr->refcnt); + ret = nfs_generic_pgio(desc, hdr); + if (ret != 0) { + pnfs_put_lseg(desc->pg_lseg); + desc->pg_lseg = NULL; + } else + pnfs_do_read(desc, hdr); + if (atomic_dec_and_test(&hdr->refcnt)) + hdr->completion_ops->completion(hdr); + return ret; +} +EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); + +static void pnfs_clear_layoutcommitting(struct inode *inode) +{ + unsigned long *bitlock = &NFS_I(inode)->flags; + + clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); + smp_mb__after_atomic(); + wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); } -EXPORT_SYMBOL_GPL(pnfs_find_get_deviceid); /* - * Add a deviceid to the cache. - * GETDEVICEINFOs for same deviceid can race. If deviceid is found, discard new + * There can be multiple RW segments. */ -struct pnfs_deviceid_node * -pnfs_add_deviceid(struct pnfs_deviceid_cache *c, struct pnfs_deviceid_node *new) -{ - struct pnfs_deviceid_node *d; - long hash = nfs4_deviceid_hash(&new->de_id); - - dprintk("--> %s hash %ld\n", __func__, hash); - spin_lock(&c->dc_lock); - d = pnfs_find_get_deviceid(c, &new->de_id); - if (d) { - spin_unlock(&c->dc_lock); - dprintk("%s [discard]\n", __func__); - c->dc_free_callback(new); - return d; +static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) +{ + struct pnfs_layout_segment *lseg; + + list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { + if (lseg->pls_range.iomode == IOMODE_RW && + test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) + list_add(&lseg->pls_lc_list, listp); + } +} + +static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) +{ + struct pnfs_layout_segment *lseg, *tmp; + + /* Matched by references in pnfs_set_layoutcommit */ + list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { + list_del_init(&lseg->pls_lc_list); + pnfs_put_lseg(lseg); } - INIT_HLIST_NODE(&new->de_node); - atomic_set(&new->de_ref, 1); - hlist_add_head_rcu(&new->de_node, &c->dc_deviceids[hash]); - spin_unlock(&c->dc_lock); - dprintk("%s [new]\n", __func__); - return new; + + pnfs_clear_layoutcommitting(inode); } -EXPORT_SYMBOL_GPL(pnfs_add_deviceid); + +void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) +{ + pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); +} +EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); void -pnfs_put_deviceid_cache(struct nfs_client *clp) +pnfs_set_layoutcommit(struct nfs_pgio_data *wdata) { - struct pnfs_deviceid_cache *local = clp->cl_devid_cache; + struct nfs_pgio_header *hdr = wdata->header; + struct inode *inode = hdr->inode; + struct nfs_inode *nfsi = NFS_I(inode); + loff_t end_pos = wdata->mds_offset + wdata->res.count; + bool mark_as_dirty = false; - dprintk("--> %s cl_devid_cache %p\n", __func__, clp->cl_devid_cache); - if (atomic_dec_and_lock(&local->dc_ref, &clp->cl_lock)) { - int i; - /* Verify cache is empty */ - for (i = 0; i < NFS4_DEVICE_ID_HASH_SIZE; i++) - BUG_ON(!hlist_empty(&local->dc_deviceids[i])); - clp->cl_devid_cache = NULL; - spin_unlock(&clp->cl_lock); - kfree(local); + spin_lock(&inode->i_lock); + if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { + mark_as_dirty = true; + dprintk("%s: Set layoutcommit for inode %lu ", + __func__, inode->i_ino); + } + if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { + /* references matched in nfs4_layoutcommit_release */ + pnfs_get_lseg(hdr->lseg); + } + if (end_pos > nfsi->layout->plh_lwb) + nfsi->layout->plh_lwb = end_pos; + spin_unlock(&inode->i_lock); + dprintk("%s: lseg %p end_pos %llu\n", + __func__, hdr->lseg, nfsi->layout->plh_lwb); + + /* if pnfs_layoutcommit_inode() runs between inode locks, the next one + * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ + if (mark_as_dirty) + mark_inode_dirty_sync(inode); +} +EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); + +void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) +{ + struct nfs_server *nfss = NFS_SERVER(data->args.inode); + + if (nfss->pnfs_curr_ld->cleanup_layoutcommit) + nfss->pnfs_curr_ld->cleanup_layoutcommit(data); + pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); +} + +/* + * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and + * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough + * data to disk to allow the server to recover the data if it crashes. + * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag + * is off, and a COMMIT is sent to a data server, or + * if WRITEs to a data server return NFS_DATA_SYNC. + */ +int +pnfs_layoutcommit_inode(struct inode *inode, bool sync) +{ + struct nfs4_layoutcommit_data *data; + struct nfs_inode *nfsi = NFS_I(inode); + loff_t end_pos; + int status; + + if (!pnfs_layoutcommit_outstanding(inode)) + return 0; + + dprintk("--> %s inode %lu\n", __func__, inode->i_ino); + + status = -EAGAIN; + if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { + if (!sync) + goto out; + status = wait_on_bit_lock(&nfsi->flags, + NFS_INO_LAYOUTCOMMITTING, + nfs_wait_bit_killable, + TASK_KILLABLE); + if (status) + goto out; + } + + status = -ENOMEM; + /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ + data = kzalloc(sizeof(*data), GFP_NOFS); + if (!data) + goto clear_layoutcommitting; + + status = 0; + spin_lock(&inode->i_lock); + if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) + goto out_unlock; + + INIT_LIST_HEAD(&data->lseg_list); + pnfs_list_write_lseg(inode, &data->lseg_list); + + end_pos = nfsi->layout->plh_lwb; + nfsi->layout->plh_lwb = 0; + + nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); + spin_unlock(&inode->i_lock); + + data->args.inode = inode; + data->cred = get_rpccred(nfsi->layout->plh_lc_cred); + nfs_fattr_init(&data->fattr); + data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; + data->res.fattr = &data->fattr; + data->args.lastbytewritten = end_pos - 1; + data->res.server = NFS_SERVER(inode); + + status = nfs4_proc_layoutcommit(data, sync); +out: + if (status) + mark_inode_dirty_sync(inode); + dprintk("<-- %s status %d\n", __func__, status); + return status; +out_unlock: + spin_unlock(&inode->i_lock); + kfree(data); +clear_layoutcommitting: + pnfs_clear_layoutcommitting(inode); + goto out; +} + +struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) +{ + struct nfs4_threshold *thp; + + thp = kzalloc(sizeof(*thp), GFP_NOFS); + if (!thp) { + dprintk("%s mdsthreshold allocation failed\n", __func__); + return NULL; } + return thp; } -EXPORT_SYMBOL_GPL(pnfs_put_deviceid_cache); diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index e12367d5048..4fb309a2b4c 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -30,11 +30,27 @@ #ifndef FS_NFS_PNFS_H #define FS_NFS_PNFS_H +#include <linux/nfs_fs.h> +#include <linux/nfs_page.h> + +enum { + NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ + NFS_LSEG_ROC, /* roc bit received from server */ + NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ +}; + struct pnfs_layout_segment { - struct list_head fi_list; - struct pnfs_layout_range range; - struct kref kref; - struct pnfs_layout_hdr *layout; + struct list_head pls_list; + struct list_head pls_lc_list; + struct pnfs_layout_range pls_range; + atomic_t pls_refcount; + unsigned long pls_flags; + struct pnfs_layout_hdr *pls_layout; +}; + +enum pnfs_try_status { + PNFS_ATTEMPTED = 0, + PNFS_NOT_ATTEMPTED = 1, }; #ifdef CONFIG_NFS_V4_1 @@ -44,113 +60,220 @@ struct pnfs_layout_segment { enum { NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ - NFS_LAYOUT_STATEID_SET, /* have a valid layout stateid */ + NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ + NFS_LAYOUT_ROC, /* some lseg had roc bit set */ + NFS_LAYOUT_RETURN, /* Return this layout ASAP */ +}; + +enum layoutdriver_policy_flags { + /* Should the pNFS client commit and return the layout upon a setattr */ + PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, + PNFS_LAYOUTRET_ON_ERROR = 1 << 1, }; +struct nfs4_deviceid_node; + /* Per-layout driver specific registration structure */ struct pnfs_layoutdriver_type { struct list_head pnfs_tblid; const u32 id; const char *name; struct module *owner; - int (*set_layoutdriver) (struct nfs_server *); + unsigned flags; + + int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); int (*clear_layoutdriver) (struct nfs_server *); - struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr); + + struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); + void (*free_layout_hdr) (struct pnfs_layout_hdr *); + + struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); void (*free_lseg) (struct pnfs_layout_segment *lseg); + + /* test for nfs page cache coalescing */ + const struct nfs_pageio_ops *pg_read_ops; + const struct nfs_pageio_ops *pg_write_ops; + + struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); + void (*mark_request_commit) (struct nfs_page *req, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo); + void (*clear_request_commit) (struct nfs_page *req, + struct nfs_commit_info *cinfo); + int (*scan_commit_lists) (struct nfs_commit_info *cinfo, + int max); + void (*recover_commit_reqs) (struct list_head *list, + struct nfs_commit_info *cinfo); + int (*commit_pagelist)(struct inode *inode, + struct list_head *mds_pages, + int how, + struct nfs_commit_info *cinfo); + + /* + * Return PNFS_ATTEMPTED to indicate the layout code has attempted + * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS + */ + enum pnfs_try_status (*read_pagelist) (struct nfs_pgio_data *nfs_data); + enum pnfs_try_status (*write_pagelist) (struct nfs_pgio_data *nfs_data, int how); + + void (*free_deviceid_node) (struct nfs4_deviceid_node *); + + void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, + struct xdr_stream *xdr, + const struct nfs4_layoutreturn_args *args); + + void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); + + void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid, + struct xdr_stream *xdr, + const struct nfs4_layoutcommit_args *args); }; struct pnfs_layout_hdr { - unsigned long refcount; - struct list_head layouts; /* other client layouts */ - struct list_head segs; /* layout segments list */ - seqlock_t seqlock; /* Protects the stateid */ - nfs4_stateid stateid; - unsigned long state; - struct inode *inode; + atomic_t plh_refcount; + struct list_head plh_layouts; /* other client layouts */ + struct list_head plh_bulk_destroy; + struct list_head plh_segs; /* layout segments list */ + nfs4_stateid plh_stateid; + atomic_t plh_outstanding; /* number of RPCs out */ + unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ + u32 plh_barrier; /* ignore lower seqids */ + unsigned long plh_retry_timestamp; + unsigned long plh_flags; + loff_t plh_lwb; /* last write byte for layoutcommit */ + struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ + struct inode *plh_inode; }; struct pnfs_device { struct nfs4_deviceid dev_id; unsigned int layout_type; unsigned int mincount; + unsigned int maxcount; /* gdia_maxcount */ struct page **pages; - void *area; unsigned int pgbase; - unsigned int pglen; + unsigned int pglen; /* reply buffer length */ }; -/* - * Device ID RCU cache. A device ID is unique per client ID and layout type. - */ -#define NFS4_DEVICE_ID_HASH_BITS 5 -#define NFS4_DEVICE_ID_HASH_SIZE (1 << NFS4_DEVICE_ID_HASH_BITS) -#define NFS4_DEVICE_ID_HASH_MASK (NFS4_DEVICE_ID_HASH_SIZE - 1) - -static inline u32 -nfs4_deviceid_hash(struct nfs4_deviceid *id) -{ - unsigned char *cptr = (unsigned char *)id->data; - unsigned int nbytes = NFS4_DEVICEID4_SIZE; - u32 x = 0; - - while (nbytes--) { - x *= 37; - x += *cptr++; - } - return x & NFS4_DEVICE_ID_HASH_MASK; -} +#define NFS4_PNFS_GETDEVLIST_MAXNUM 16 -struct pnfs_deviceid_node { - struct hlist_node de_node; - struct nfs4_deviceid de_id; - atomic_t de_ref; +struct pnfs_devicelist { + unsigned int eof; + unsigned int num_devs; + struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; }; -struct pnfs_deviceid_cache { - spinlock_t dc_lock; - atomic_t dc_ref; - void (*dc_free_callback)(struct pnfs_deviceid_node *); - struct hlist_head dc_deviceids[NFS4_DEVICE_ID_HASH_SIZE]; -}; - -extern int pnfs_alloc_init_deviceid_cache(struct nfs_client *, - void (*free_callback)(struct pnfs_deviceid_node *)); -extern void pnfs_put_deviceid_cache(struct nfs_client *); -extern struct pnfs_deviceid_node *pnfs_find_get_deviceid( - struct pnfs_deviceid_cache *, - struct nfs4_deviceid *); -extern struct pnfs_deviceid_node *pnfs_add_deviceid( - struct pnfs_deviceid_cache *, - struct pnfs_deviceid_node *); -extern void pnfs_put_deviceid(struct pnfs_deviceid_cache *c, - struct pnfs_deviceid_node *devid); - extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); /* nfs4proc.c */ +extern int nfs4_proc_getdevicelist(struct nfs_server *server, + const struct nfs_fh *fh, + struct pnfs_devicelist *devlist); extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, - struct pnfs_device *dev); -extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp); + struct pnfs_device *dev, + struct rpc_cred *cred); +extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); +extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp); /* pnfs.c */ -struct pnfs_layout_segment * -pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, - enum pnfs_iomode access_type); -void set_pnfs_layoutdriver(struct nfs_server *, u32 id); +void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); +void pnfs_put_lseg(struct pnfs_layout_segment *lseg); + +void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); void unset_pnfs_layoutdriver(struct nfs_server *); -int pnfs_layout_process(struct nfs4_layoutget *lgp); +void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); +int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); +void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req, u64 wb_size); +int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); +size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, + struct nfs_page *prev, struct nfs_page *req); +void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); +struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); +void pnfs_free_lseg_list(struct list_head *tmp_list); void pnfs_destroy_layout(struct nfs_inode *); void pnfs_destroy_all_layouts(struct nfs_client *); -void put_layout_hdr(struct inode *inode); -void pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, - struct nfs4_state *open_state); +int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, + struct nfs_fsid *fsid, + bool is_recall); +int pnfs_destroy_layouts_byclid(struct nfs_client *clp, + bool is_recall); +void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); +void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, + const nfs4_stateid *new, + bool update_barrier); +int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, + struct pnfs_layout_hdr *lo, + struct nfs4_state *open_state); +int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, + struct list_head *tmp_list, + struct pnfs_layout_range *recall_range); +bool pnfs_roc(struct inode *ino); +void pnfs_roc_release(struct inode *ino); +void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); +bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); +void pnfs_set_layoutcommit(struct nfs_pgio_data *wdata); +void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); +int pnfs_layoutcommit_inode(struct inode *inode, bool sync); +int _pnfs_return_layout(struct inode *); +int pnfs_commit_and_return_layout(struct inode *); +void pnfs_ld_write_done(struct nfs_pgio_data *); +void pnfs_ld_read_done(struct nfs_pgio_data *); +struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, + struct nfs_open_context *ctx, + loff_t pos, + u64 count, + enum pnfs_iomode iomode, + gfp_t gfp_flags); +void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); +int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head, + const struct nfs_pgio_completion_ops *compl_ops, + struct nfs_direct_req *dreq); +int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head, + const struct nfs_pgio_completion_ops *compl_ops, + struct nfs_direct_req *dreq); +struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); -static inline int lo_fail_bit(u32 iomode) +/* nfs4_deviceid_flags */ +enum { + NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ + NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ +}; + +/* pnfs_dev.c */ +struct nfs4_deviceid_node { + struct hlist_node node; + struct hlist_node tmpnode; + const struct pnfs_layoutdriver_type *ld; + const struct nfs_client *nfs_client; + unsigned long flags; + unsigned long timestamp_unavailable; + struct nfs4_deviceid deviceid; + atomic_t ref; +}; + +struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); +void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); +void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, + const struct pnfs_layoutdriver_type *, + const struct nfs_client *, + const struct nfs4_deviceid *); +struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); +bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); +void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); +bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); +void nfs4_deviceid_purge_client(const struct nfs_client *); + +static inline struct pnfs_layout_segment * +pnfs_get_lseg(struct pnfs_layout_segment *lseg) { - return iomode == IOMODE_RW ? - NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; + if (lseg) { + atomic_inc(&lseg->pls_refcount); + smp_mb__after_atomic(); + } + return lseg; } /* Return true if a layout driver is being used for this mountpoint */ @@ -159,6 +282,114 @@ static inline int pnfs_enabled_sb(struct nfs_server *nfss) return nfss->pnfs_curr_ld != NULL; } +static inline int +pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, + struct nfs_commit_info *cinfo) +{ + if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) + return PNFS_NOT_ATTEMPTED; + return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); +} + +static inline struct pnfs_ds_commit_info * +pnfs_get_ds_info(struct inode *inode) +{ + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; + + if (ld == NULL || ld->get_ds_info == NULL) + return NULL; + return ld->get_ds_info(inode); +} + +static inline bool +pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + struct inode *inode = req->wb_context->dentry->d_inode; + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; + + if (lseg == NULL || ld->mark_request_commit == NULL) + return false; + ld->mark_request_commit(req, lseg, cinfo); + return true; +} + +static inline bool +pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) +{ + struct inode *inode = req->wb_context->dentry->d_inode; + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; + + if (ld == NULL || ld->clear_request_commit == NULL) + return false; + ld->clear_request_commit(req, cinfo); + return true; +} + +static inline int +pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, + int max) +{ + if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) + return 0; + else + return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); +} + +static inline void +pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, + struct nfs_commit_info *cinfo) +{ + if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) + return; + NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo); +} + +/* Should the pNFS client commit and return the layout upon a setattr */ +static inline bool +pnfs_ld_layoutret_on_setattr(struct inode *inode) +{ + if (!pnfs_enabled_sb(NFS_SERVER(inode))) + return false; + return NFS_SERVER(inode)->pnfs_curr_ld->flags & + PNFS_LAYOUTRET_ON_SETATTR; +} + +static inline bool +pnfs_layoutcommit_outstanding(struct inode *inode) +{ + struct nfs_inode *nfsi = NFS_I(inode); + + return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || + test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; +} + +static inline int pnfs_return_layout(struct inode *ino) +{ + struct nfs_inode *nfsi = NFS_I(ino); + struct nfs_server *nfss = NFS_SERVER(ino); + + if (pnfs_enabled_sb(nfss) && nfsi->layout) + return _pnfs_return_layout(ino); + + return 0; +} + +static inline bool +pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, + struct nfs_server *nfss) +{ + return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && + nfss->pnfs_curr_ld->id == src->l_type); +} + +#ifdef NFS_DEBUG +void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); +#else +static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) +{ +} +#endif /* NFS_DEBUG */ #else /* CONFIG_NFS_V4_1 */ static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) @@ -170,13 +401,55 @@ static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) } static inline struct pnfs_layout_segment * -pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, - enum pnfs_iomode access_type) +pnfs_get_lseg(struct pnfs_layout_segment *lseg) { return NULL; } -static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id) +static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) +{ +} + +static inline int pnfs_return_layout(struct inode *ino) +{ + return 0; +} + +static inline int pnfs_commit_and_return_layout(struct inode *inode) +{ + return 0; +} + +static inline bool +pnfs_ld_layoutret_on_setattr(struct inode *inode) +{ + return false; +} + +static inline bool +pnfs_roc(struct inode *ino) +{ + return false; +} + +static inline void +pnfs_roc_release(struct inode *ino) +{ +} + +static inline void +pnfs_roc_set_barrier(struct inode *ino, u32 barrier) +{ +} + +static inline bool +pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) +{ + return false; +} + +static inline void set_pnfs_layoutdriver(struct nfs_server *s, + const struct nfs_fh *mntfh, u32 id) { } @@ -184,6 +457,69 @@ static inline void unset_pnfs_layoutdriver(struct nfs_server *s) { } +static inline int +pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, + struct nfs_commit_info *cinfo) +{ + return PNFS_NOT_ATTEMPTED; +} + +static inline struct pnfs_ds_commit_info * +pnfs_get_ds_info(struct inode *inode) +{ + return NULL; +} + +static inline bool +pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + return false; +} + +static inline bool +pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) +{ + return false; +} + +static inline int +pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, + int max) +{ + return 0; +} + +static inline void +pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, + struct nfs_commit_info *cinfo) +{ +} + +static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) +{ + return 0; +} + +static inline bool +pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, + struct nfs_server *nfss) +{ + return false; +} + +static inline bool +pnfs_layoutcommit_outstanding(struct inode *inode) +{ + return false; +} + + +static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) +{ + return NULL; +} + #endif /* CONFIG_NFS_V4_1 */ #endif /* FS_NFS_PNFS_H */ diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c new file mode 100644 index 00000000000..6da209bd940 --- /dev/null +++ b/fs/nfs/pnfs_dev.c @@ -0,0 +1,302 @@ +/* + * Device operations for the pnfs client. + * + * Copyright (c) 2002 + * The Regents of the University of Michigan + * All Rights Reserved + * + * Dean Hildebrand <dhildebz@umich.edu> + * Garth Goodson <Garth.Goodson@netapp.com> + * + * Permission is granted to use, copy, create derivative works, and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the University of Michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. If + * the above copyright notice or any other identification of the + * University of Michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * This software is provided as is, without representation or warranty + * of any kind either express or implied, including without limitation + * the implied warranties of merchantability, fitness for a particular + * purpose, or noninfringement. The Regents of the University of + * Michigan shall not be liable for any damages, including special, + * indirect, incidental, or consequential damages, with respect to any + * claim arising out of or in connection with the use of the software, + * even if it has been or is hereafter advised of the possibility of + * such damages. + */ + +#include <linux/export.h> +#include "pnfs.h" + +#define NFSDBG_FACILITY NFSDBG_PNFS + +/* + * Device ID RCU cache. A device ID is unique per server and layout type. + */ +#define NFS4_DEVICE_ID_HASH_BITS 5 +#define NFS4_DEVICE_ID_HASH_SIZE (1 << NFS4_DEVICE_ID_HASH_BITS) +#define NFS4_DEVICE_ID_HASH_MASK (NFS4_DEVICE_ID_HASH_SIZE - 1) + +#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) + +static struct hlist_head nfs4_deviceid_cache[NFS4_DEVICE_ID_HASH_SIZE]; +static DEFINE_SPINLOCK(nfs4_deviceid_lock); + +#ifdef NFS_DEBUG +void +nfs4_print_deviceid(const struct nfs4_deviceid *id) +{ + u32 *p = (u32 *)id; + + dprintk("%s: device id= [%x%x%x%x]\n", __func__, + p[0], p[1], p[2], p[3]); +} +EXPORT_SYMBOL_GPL(nfs4_print_deviceid); +#endif + +static inline u32 +nfs4_deviceid_hash(const struct nfs4_deviceid *id) +{ + unsigned char *cptr = (unsigned char *)id->data; + unsigned int nbytes = NFS4_DEVICEID4_SIZE; + u32 x = 0; + + while (nbytes--) { + x *= 37; + x += *cptr++; + } + return x & NFS4_DEVICE_ID_HASH_MASK; +} + +static struct nfs4_deviceid_node * +_lookup_deviceid(const struct pnfs_layoutdriver_type *ld, + const struct nfs_client *clp, const struct nfs4_deviceid *id, + long hash) +{ + struct nfs4_deviceid_node *d; + + hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[hash], node) + if (d->ld == ld && d->nfs_client == clp && + !memcmp(&d->deviceid, id, sizeof(*id))) { + if (atomic_read(&d->ref)) + return d; + else + continue; + } + return NULL; +} + +/* + * Lookup a deviceid in cache and get a reference count on it if found + * + * @clp nfs_client associated with deviceid + * @id deviceid to look up + */ +static struct nfs4_deviceid_node * +_find_get_deviceid(const struct pnfs_layoutdriver_type *ld, + const struct nfs_client *clp, const struct nfs4_deviceid *id, + long hash) +{ + struct nfs4_deviceid_node *d; + + rcu_read_lock(); + d = _lookup_deviceid(ld, clp, id, hash); + if (d != NULL) + atomic_inc(&d->ref); + rcu_read_unlock(); + return d; +} + +struct nfs4_deviceid_node * +nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *ld, + const struct nfs_client *clp, const struct nfs4_deviceid *id) +{ + return _find_get_deviceid(ld, clp, id, nfs4_deviceid_hash(id)); +} +EXPORT_SYMBOL_GPL(nfs4_find_get_deviceid); + +/* + * Remove a deviceid from cache + * + * @clp nfs_client associated with deviceid + * @id the deviceid to unhash + * + * @ret the unhashed node, if found and dereferenced to zero, NULL otherwise. + */ +void +nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *ld, + const struct nfs_client *clp, const struct nfs4_deviceid *id) +{ + struct nfs4_deviceid_node *d; + + spin_lock(&nfs4_deviceid_lock); + rcu_read_lock(); + d = _lookup_deviceid(ld, clp, id, nfs4_deviceid_hash(id)); + rcu_read_unlock(); + if (!d) { + spin_unlock(&nfs4_deviceid_lock); + return; + } + hlist_del_init_rcu(&d->node); + spin_unlock(&nfs4_deviceid_lock); + synchronize_rcu(); + + /* balance the initial ref set in pnfs_insert_deviceid */ + if (atomic_dec_and_test(&d->ref)) + d->ld->free_deviceid_node(d); +} +EXPORT_SYMBOL_GPL(nfs4_delete_deviceid); + +void +nfs4_init_deviceid_node(struct nfs4_deviceid_node *d, + const struct pnfs_layoutdriver_type *ld, + const struct nfs_client *nfs_client, + const struct nfs4_deviceid *id) +{ + INIT_HLIST_NODE(&d->node); + INIT_HLIST_NODE(&d->tmpnode); + d->ld = ld; + d->nfs_client = nfs_client; + d->flags = 0; + d->deviceid = *id; + atomic_set(&d->ref, 1); +} +EXPORT_SYMBOL_GPL(nfs4_init_deviceid_node); + +/* + * Uniquely initialize and insert a deviceid node into cache + * + * @new new deviceid node + * Note that the caller must set up the following members: + * new->ld + * new->nfs_client + * new->deviceid + * + * @ret the inserted node, if none found, otherwise, the found entry. + */ +struct nfs4_deviceid_node * +nfs4_insert_deviceid_node(struct nfs4_deviceid_node *new) +{ + struct nfs4_deviceid_node *d; + long hash; + + spin_lock(&nfs4_deviceid_lock); + hash = nfs4_deviceid_hash(&new->deviceid); + d = _find_get_deviceid(new->ld, new->nfs_client, &new->deviceid, hash); + if (d) { + spin_unlock(&nfs4_deviceid_lock); + return d; + } + + hlist_add_head_rcu(&new->node, &nfs4_deviceid_cache[hash]); + spin_unlock(&nfs4_deviceid_lock); + atomic_inc(&new->ref); + + return new; +} +EXPORT_SYMBOL_GPL(nfs4_insert_deviceid_node); + +/* + * Dereference a deviceid node and delete it when its reference count drops + * to zero. + * + * @d deviceid node to put + * + * return true iff the node was deleted + * Note that since the test for d->ref == 0 is sufficient to establish + * that the node is no longer hashed in the global device id cache. + */ +bool +nfs4_put_deviceid_node(struct nfs4_deviceid_node *d) +{ + if (!atomic_dec_and_test(&d->ref)) + return false; + d->ld->free_deviceid_node(d); + return true; +} +EXPORT_SYMBOL_GPL(nfs4_put_deviceid_node); + +void +nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node) +{ + node->timestamp_unavailable = jiffies; + set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); +} +EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable); + +bool +nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node) +{ + if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) { + unsigned long start, end; + + end = jiffies; + start = end - PNFS_DEVICE_RETRY_TIMEOUT; + if (time_in_range(node->timestamp_unavailable, start, end)) + return true; + clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); + } + return false; +} +EXPORT_SYMBOL_GPL(nfs4_test_deviceid_unavailable); + +static void +_deviceid_purge_client(const struct nfs_client *clp, long hash) +{ + struct nfs4_deviceid_node *d; + HLIST_HEAD(tmp); + + spin_lock(&nfs4_deviceid_lock); + rcu_read_lock(); + hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[hash], node) + if (d->nfs_client == clp && atomic_read(&d->ref)) { + hlist_del_init_rcu(&d->node); + hlist_add_head(&d->tmpnode, &tmp); + } + rcu_read_unlock(); + spin_unlock(&nfs4_deviceid_lock); + + if (hlist_empty(&tmp)) + return; + + synchronize_rcu(); + while (!hlist_empty(&tmp)) { + d = hlist_entry(tmp.first, struct nfs4_deviceid_node, tmpnode); + hlist_del(&d->tmpnode); + if (atomic_dec_and_test(&d->ref)) + d->ld->free_deviceid_node(d); + } +} + +void +nfs4_deviceid_purge_client(const struct nfs_client *clp) +{ + long h; + + if (!(clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_MDS)) + return; + for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++) + _deviceid_purge_client(clp, h); +} + +/* + * Stop use of all deviceids associated with an nfs_client + */ +void +nfs4_deviceid_mark_client_invalid(struct nfs_client *clp) +{ + struct nfs4_deviceid_node *d; + int i; + + rcu_read_lock(); + for (i = 0; i < NFS4_DEVICE_ID_HASH_SIZE; i ++){ + hlist_for_each_entry_rcu(d, &nfs4_deviceid_cache[i], node) + if (d->nfs_client == clp) + set_bit(NFS_DEVICEID_INVALID, &d->flags); + } + rcu_read_unlock(); +} + diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 58e7f84fc1f..c171ce1a8a3 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -41,44 +41,12 @@ #include <linux/nfs_fs.h> #include <linux/nfs_page.h> #include <linux/lockd/bind.h> +#include <linux/freezer.h> #include "internal.h" #define NFSDBG_FACILITY NFSDBG_PROC /* - * wrapper to handle the -EKEYEXPIRED error message. This should generally - * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't - * support the NFSERR_JUKEBOX error code, but we handle this situation in the - * same way that we handle that error with NFSv3. - */ -static int -nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) -{ - int res; - do { - res = rpc_call_sync(clnt, msg, flags); - if (res != -EKEYEXPIRED) - break; - schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); - res = -ERESTARTSYS; - } while (!fatal_signal_pending(current)); - return res; -} - -#define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) - -static int -nfs_async_handle_expired_key(struct rpc_task *task) -{ - if (task->tk_status != -EKEYEXPIRED) - return 0; - task->tk_status = 0; - rpc_restart_call(task); - rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); - return 1; -} - -/* * Bare-bones access to getattr: this is for nfs_read_super. */ static int @@ -130,7 +98,7 @@ nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, */ static int nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, - struct nfs_fattr *fattr) + struct nfs_fattr *fattr, struct nfs4_label *label) { struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], @@ -178,7 +146,8 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, static int nfs_proc_lookup(struct inode *dir, struct qstr *name, - struct nfs_fh *fhandle, struct nfs_fattr *fattr) + struct nfs_fh *fhandle, struct nfs_fattr *fattr, + struct nfs4_label *label) { struct nfs_diropargs arg = { .fh = NFS_FH(dir), @@ -258,7 +227,7 @@ static void nfs_free_createdata(const struct nfs_createdata *data) static int nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags, struct nfs_open_context *ctx) + int flags) { struct nfs_createdata *data; struct rpc_message msg = { @@ -266,7 +235,7 @@ nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, }; int status = -ENOMEM; - dprintk("NFS call create %s\n", dentry->d_name.name); + dprintk("NFS call create %pd\n", dentry); data = nfs_alloc_createdata(dir, dentry, sattr); if (data == NULL) goto out; @@ -275,7 +244,7 @@ nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) - status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); + status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); nfs_free_createdata(data); out: dprintk("NFS reply create: %d\n", status); @@ -296,7 +265,7 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, umode_t mode; int status = -ENOMEM; - dprintk("NFS call mknod %s\n", dentry->d_name.name); + dprintk("NFS call mknod %pd\n", dentry); mode = sattr->ia_mode; if (S_ISFIFO(mode)) { @@ -322,7 +291,7 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); } if (status == 0) - status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); + status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); nfs_free_createdata(data); out: dprintk("NFS reply mknod: %d\n", status); @@ -334,8 +303,7 @@ nfs_proc_remove(struct inode *dir, struct qstr *name) { struct nfs_removeargs arg = { .fh = NFS_FH(dir), - .name.len = name->len, - .name.name = name->name, + .name = *name, }; struct rpc_message msg = { .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], @@ -357,10 +325,13 @@ nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; } +static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) +{ + rpc_call_start(task); +} + static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) { - if (nfs_async_handle_expired_key(task)) - return 0; nfs_mark_for_revalidate(dir); return 1; } @@ -371,42 +342,21 @@ nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; } +static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) +{ + rpc_call_start(task); +} + static int nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) { - if (nfs_async_handle_expired_key(task)) - return 0; nfs_mark_for_revalidate(old_dir); nfs_mark_for_revalidate(new_dir); return 1; } static int -nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, - struct inode *new_dir, struct qstr *new_name) -{ - struct nfs_renameargs arg = { - .old_dir = NFS_FH(old_dir), - .old_name = old_name, - .new_dir = NFS_FH(new_dir), - .new_name = new_name, - }; - struct rpc_message msg = { - .rpc_proc = &nfs_procedures[NFSPROC_RENAME], - .rpc_argp = &arg, - }; - int status; - - dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); - status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); - nfs_mark_for_revalidate(old_dir); - nfs_mark_for_revalidate(new_dir); - dprintk("NFS reply rename: %d\n", status); - return status; -} - -static int nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { struct nfs_linkargs arg = { @@ -449,7 +399,7 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, }; int status = -ENAMETOOLONG; - dprintk("NFS call symlink %s\n", dentry->d_name.name); + dprintk("NFS call symlink %pd\n", dentry); if (len > NFS2_MAXPATHLEN) goto out; @@ -458,7 +408,7 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, fattr = nfs_alloc_fattr(); status = -ENOMEM; if (fh == NULL || fattr == NULL) - goto out; + goto out_free; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); @@ -469,8 +419,9 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, * should fill in the data with a LOOKUP call on the wire. */ if (status == 0) - status = nfs_instantiate(dentry, fh, fattr); + status = nfs_instantiate(dentry, fh, fattr, NULL); +out_free: nfs_free_fattr(fattr); nfs_free_fhandle(fh); out: @@ -487,7 +438,7 @@ nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) }; int status = -ENOMEM; - dprintk("NFS call mkdir %s\n", dentry->d_name.name); + dprintk("NFS call mkdir %pd\n", dentry); data = nfs_alloc_createdata(dir, dentry, sattr); if (data == NULL) goto out; @@ -497,7 +448,7 @@ nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); if (status == 0) - status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); + status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); nfs_free_createdata(data); out: dprintk("NFS reply mkdir: %d\n", status); @@ -627,47 +578,56 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, return 0; } -static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) +static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_data *data) { - if (nfs_async_handle_expired_key(task)) - return -EAGAIN; + struct inode *inode = data->header->inode; - nfs_invalidate_atime(data->inode); + nfs_invalidate_atime(inode); if (task->tk_status >= 0) { - nfs_refresh_inode(data->inode, data->res.fattr); + nfs_refresh_inode(inode, data->res.fattr); /* Emulate the eof flag, which isn't normally needed in NFSv2 * as it is guaranteed to always return the file attributes */ - if (data->args.offset + data->args.count >= data->res.fattr->size) + if (data->args.offset + data->res.count >= data->res.fattr->size) data->res.eof = 1; } return 0; } -static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) +static void nfs_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg) { msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; } -static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) +static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data) { - if (nfs_async_handle_expired_key(task)) - return -EAGAIN; + rpc_call_start(task); + return 0; +} + +static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_data *data) +{ + struct inode *inode = data->header->inode; if (task->tk_status >= 0) - nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); + nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); return 0; } -static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) +static void nfs_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg) { /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ data->args.stable = NFS_FILE_SYNC; msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; } +static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) +{ + BUG(); +} + static void -nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) +nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) { BUG(); } @@ -675,7 +635,7 @@ nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) static int nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) { - struct inode *inode = filp->f_path.dentry->d_inode; + struct inode *inode = file_inode(filp); return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); } @@ -704,12 +664,47 @@ out_einval: return -EINVAL; } +static int nfs_have_delegation(struct inode *inode, fmode_t flags) +{ + return 0; +} + +static int nfs_return_delegation(struct inode *inode) +{ + nfs_wb_all(inode); + return 0; +} + +static const struct inode_operations nfs_dir_inode_operations = { + .create = nfs_create, + .lookup = nfs_lookup, + .link = nfs_link, + .unlink = nfs_unlink, + .symlink = nfs_symlink, + .mkdir = nfs_mkdir, + .rmdir = nfs_rmdir, + .mknod = nfs_mknod, + .rename = nfs_rename, + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +}; + +static const struct inode_operations nfs_file_inode_operations = { + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +}; + const struct nfs_rpc_ops nfs_v2_clientops = { .version = 2, /* protocol version */ .dentry_ops = &nfs_dentry_operations, .dir_inode_ops = &nfs_dir_inode_operations, .file_inode_ops = &nfs_file_inode_operations, + .file_ops = &nfs_file_operations, .getroot = nfs_proc_get_root, + .submount = nfs_submount, + .try_mount = nfs_try_mount, .getattr = nfs_proc_getattr, .setattr = nfs_proc_setattr, .lookup = nfs_proc_lookup, @@ -718,9 +713,10 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .create = nfs_proc_create, .remove = nfs_proc_remove, .unlink_setup = nfs_proc_unlink_setup, + .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, .unlink_done = nfs_proc_unlink_done, - .rename = nfs_proc_rename, .rename_setup = nfs_proc_rename_setup, + .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, .rename_done = nfs_proc_rename_done, .link = nfs_proc_link, .symlink = nfs_proc_symlink, @@ -731,13 +727,22 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .statfs = nfs_proc_statfs, .fsinfo = nfs_proc_fsinfo, .pathconf = nfs_proc_pathconf, - .decode_dirent = nfs_decode_dirent, + .decode_dirent = nfs2_decode_dirent, + .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare, .read_setup = nfs_proc_read_setup, .read_done = nfs_read_done, .write_setup = nfs_proc_write_setup, .write_done = nfs_write_done, .commit_setup = nfs_proc_commit_setup, + .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, .lock = nfs_proc_lock, .lock_check_bounds = nfs_lock_check_bounds, .close_context = nfs_close_context, + .have_delegation = nfs_have_delegation, + .return_delegation = nfs_return_delegation, + .alloc_client = nfs_alloc_client, + .init_client = nfs_init_client, + .free_client = nfs_free_client, + .create_server = nfs_create_server, + .clone_server = nfs_clone_server, }; diff --git a/fs/nfs/read.c b/fs/nfs/read.c index e4b62c6f5a6..e818a475ca6 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -18,8 +18,7 @@ #include <linux/sunrpc/clnt.h> #include <linux/nfs_fs.h> #include <linux/nfs_page.h> - -#include <asm/system.h> +#include <linux/module.h> #include "nfs4_fs.h" #include "internal.h" @@ -29,48 +28,19 @@ #define NFSDBG_FACILITY NFSDBG_PAGECACHE -static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int); -static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int); -static const struct rpc_call_ops nfs_read_partial_ops; -static const struct rpc_call_ops nfs_read_full_ops; +static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops; +static const struct nfs_rw_ops nfs_rw_read_ops; static struct kmem_cache *nfs_rdata_cachep; -static mempool_t *nfs_rdata_mempool; - -#define MIN_POOL_READ (32) - -struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount) -{ - struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, GFP_KERNEL); - - if (p) { - memset(p, 0, sizeof(*p)); - INIT_LIST_HEAD(&p->pages); - p->npages = pagecount; - if (pagecount <= ARRAY_SIZE(p->page_array)) - p->pagevec = p->page_array; - else { - p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL); - if (!p->pagevec) { - mempool_free(p, nfs_rdata_mempool); - p = NULL; - } - } - } - return p; -} -void nfs_readdata_free(struct nfs_read_data *p) +static struct nfs_rw_header *nfs_readhdr_alloc(void) { - if (p && (p->pagevec != &p->page_array[0])) - kfree(p->pagevec); - mempool_free(p, nfs_rdata_mempool); + return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL); } -static void nfs_readdata_release(struct nfs_read_data *rdata) +static void nfs_readhdr_free(struct nfs_rw_header *rhdr) { - put_nfs_open_context(rdata->args.context); - nfs_readdata_free(rdata); + kmem_cache_free(nfs_rdata_cachep, rhdr); } static @@ -82,47 +52,40 @@ int nfs_return_empty_page(struct page *page) return 0; } -static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data) +void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, + struct inode *inode, bool force_mds, + const struct nfs_pgio_completion_ops *compl_ops) { - unsigned int remainder = data->args.count - data->res.count; - unsigned int base = data->args.pgbase + data->res.count; - unsigned int pglen; - struct page **pages; + struct nfs_server *server = NFS_SERVER(inode); + const struct nfs_pageio_ops *pg_ops = &nfs_pgio_rw_ops; + +#ifdef CONFIG_NFS_V4_1 + if (server->pnfs_curr_ld && !force_mds) + pg_ops = server->pnfs_curr_ld->pg_read_ops; +#endif + nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_read_ops, + server->rsize, 0); +} +EXPORT_SYMBOL_GPL(nfs_pageio_init_read); - if (data->res.eof == 0 || remainder == 0) - return; - /* - * Note: "remainder" can never be negative, since we check for - * this in the XDR code. - */ - pages = &data->args.pages[base >> PAGE_CACHE_SHIFT]; - base &= ~PAGE_CACHE_MASK; - pglen = PAGE_CACHE_SIZE - base; - for (;;) { - if (remainder <= pglen) { - zero_user(*pages, base, remainder); - break; - } - zero_user(*pages, base, pglen); - pages++; - remainder -= pglen; - pglen = PAGE_CACHE_SIZE; - base = 0; - } +void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio) +{ + pgio->pg_ops = &nfs_pgio_rw_ops; + pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize; } +EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds); int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, struct page *page) { - LIST_HEAD(one_request); struct nfs_page *new; unsigned int len; + struct nfs_pageio_descriptor pgio; len = nfs_page_length(page); if (len == 0) return nfs_return_empty_page(page); - pnfs_update_layout(inode, ctx, IOMODE_READ); - new = nfs_create_request(ctx, inode, page, 0, len); + new = nfs_create_request(ctx, page, NULL, 0, len); if (IS_ERR(new)) { unlock_page(page); return PTR_ERR(new); @@ -130,370 +93,171 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode, if (len < PAGE_CACHE_SIZE) zero_user_segment(page, len, PAGE_CACHE_SIZE); - nfs_list_add_request(new, &one_request); - if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE) - nfs_pagein_multi(inode, &one_request, 1, len, 0); - else - nfs_pagein_one(inode, &one_request, 1, len, 0); + nfs_pageio_init_read(&pgio, inode, false, + &nfs_async_read_completion_ops); + nfs_pageio_add_request(&pgio, new); + nfs_pageio_complete(&pgio); + NFS_I(inode)->read_io += pgio.pg_bytes_written; return 0; } static void nfs_readpage_release(struct nfs_page *req) { - struct inode *d_inode = req->wb_context->path.dentry->d_inode; + struct inode *d_inode = req->wb_context->dentry->d_inode; - if (PageUptodate(req->wb_page)) - nfs_readpage_to_fscache(d_inode, req->wb_page, 0); + dprintk("NFS: read done (%s/%llu %d@%lld)\n", d_inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(d_inode), req->wb_bytes, + (long long)req_offset(req)); - unlock_page(req->wb_page); + if (nfs_page_group_sync_on_bit(req, PG_UNLOCKPAGE)) { + if (PageUptodate(req->wb_page)) + nfs_readpage_to_fscache(d_inode, req->wb_page, 0); - dprintk("NFS: read done (%s/%Ld %d@%Ld)\n", - req->wb_context->path.dentry->d_inode->i_sb->s_id, - (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode), + unlock_page(req->wb_page); + } + + dprintk("NFS: read done (%s/%Lu %d@%Ld)\n", + req->wb_context->dentry->d_inode->i_sb->s_id, + (unsigned long long)NFS_FILEID(req->wb_context->dentry->d_inode), req->wb_bytes, (long long)req_offset(req)); - nfs_clear_request(req); nfs_release_request(req); } -/* - * Set up the NFS read request struct - */ -static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data, - const struct rpc_call_ops *call_ops, - unsigned int count, unsigned int offset) +static void nfs_page_group_set_uptodate(struct nfs_page *req) { - struct inode *inode = req->wb_context->path.dentry->d_inode; - int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0; - struct rpc_task *task; - struct rpc_message msg = { - .rpc_argp = &data->args, - .rpc_resp = &data->res, - .rpc_cred = req->wb_context->cred, - }; - struct rpc_task_setup task_setup_data = { - .task = &data->task, - .rpc_client = NFS_CLIENT(inode), - .rpc_message = &msg, - .callback_ops = call_ops, - .callback_data = data, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC | swap_flags, - }; - - data->req = req; - data->inode = inode; - data->cred = msg.rpc_cred; - - data->args.fh = NFS_FH(inode); - data->args.offset = req_offset(req) + offset; - data->args.pgbase = req->wb_pgbase + offset; - data->args.pages = data->pagevec; - data->args.count = count; - data->args.context = get_nfs_open_context(req->wb_context); - data->args.lock_context = req->wb_lock_context; - - data->res.fattr = &data->fattr; - data->res.count = count; - data->res.eof = 0; - nfs_fattr_init(&data->fattr); - - /* Set up the initial task struct. */ - NFS_PROTO(inode)->read_setup(data, &msg); - - dprintk("NFS: %5u initiated read call (req %s/%Ld, %u bytes @ offset %Lu)\n", - data->task.tk_pid, - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - count, - (unsigned long long)data->args.offset); - - task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) - return PTR_ERR(task); - rpc_put_task(task); - return 0; + if (nfs_page_group_sync_on_bit(req, PG_UPTODATE)) + SetPageUptodate(req->wb_page); } -static void -nfs_async_read_error(struct list_head *head) +static void nfs_read_completion(struct nfs_pgio_header *hdr) { - struct nfs_page *req; + unsigned long bytes = 0; - while (!list_empty(head)) { - req = nfs_list_entry(head->next); + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) + goto out; + while (!list_empty(&hdr->pages)) { + struct nfs_page *req = nfs_list_entry(hdr->pages.next); + struct page *page = req->wb_page; + unsigned long start = req->wb_pgbase; + unsigned long end = req->wb_pgbase + req->wb_bytes; + + if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) { + /* note: regions of the page not covered by a + * request are zeroed in nfs_readpage_async / + * readpage_async_filler */ + if (bytes > hdr->good_bytes) { + /* nothing in this request was good, so zero + * the full extent of the request */ + zero_user_segment(page, start, end); + + } else if (hdr->good_bytes - bytes < req->wb_bytes) { + /* part of this request has good bytes, but + * not all. zero the bad bytes */ + start += hdr->good_bytes - bytes; + WARN_ON(start < req->wb_pgbase); + zero_user_segment(page, start, end); + } + } + bytes += req->wb_bytes; + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) { + if (bytes <= hdr->good_bytes) + nfs_page_group_set_uptodate(req); + } else + nfs_page_group_set_uptodate(req); nfs_list_remove_request(req); - SetPageError(req->wb_page); nfs_readpage_release(req); } +out: + hdr->release(hdr); } -/* - * Generate multiple requests to fill a single page. - * - * We optimize to reduce the number of read operations on the wire. If we - * detect that we're reading a page, or an area of a page, that is past the - * end of file, we do not generate NFS read operations but just clear the - * parts of the page that would have come back zero from the server anyway. - * - * We rely on the cached value of i_size to make this determination; another - * client can fill pages on the server past our cached end-of-file, but we - * won't see the new data until our attribute cache is updated. This is more - * or less conventional NFS client behavior. - */ -static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags) +static void nfs_initiate_read(struct nfs_pgio_data *data, struct rpc_message *msg, + struct rpc_task_setup *task_setup_data, int how) { - struct nfs_page *req = nfs_list_entry(head->next); - struct page *page = req->wb_page; - struct nfs_read_data *data; - size_t rsize = NFS_SERVER(inode)->rsize, nbytes; - unsigned int offset; - int requests = 0; - int ret = 0; - LIST_HEAD(list); - - nfs_list_remove_request(req); - - nbytes = count; - do { - size_t len = min(nbytes,rsize); - - data = nfs_readdata_alloc(1); - if (!data) - goto out_bad; - list_add(&data->pages, &list); - requests++; - nbytes -= len; - } while(nbytes != 0); - atomic_set(&req->wb_complete, requests); - - ClearPageError(page); - offset = 0; - nbytes = count; - do { - int ret2; - - data = list_entry(list.next, struct nfs_read_data, pages); - list_del_init(&data->pages); - - data->pagevec[0] = page; - - if (nbytes < rsize) - rsize = nbytes; - ret2 = nfs_read_rpcsetup(req, data, &nfs_read_partial_ops, - rsize, offset); - if (ret == 0) - ret = ret2; - offset += rsize; - nbytes -= rsize; - } while (nbytes != 0); - - return ret; + struct inode *inode = data->header->inode; + int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0; -out_bad: - while (!list_empty(&list)) { - data = list_entry(list.next, struct nfs_read_data, pages); - list_del(&data->pages); - nfs_readdata_free(data); - } - SetPageError(page); - nfs_readpage_release(req); - return -ENOMEM; + task_setup_data->flags |= swap_flags; + NFS_PROTO(inode)->read_setup(data, msg); } -static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags) +static void +nfs_async_read_error(struct list_head *head) { - struct nfs_page *req; - struct page **pages; - struct nfs_read_data *data; - int ret = -ENOMEM; - - data = nfs_readdata_alloc(npages); - if (!data) - goto out_bad; + struct nfs_page *req; - pages = data->pagevec; while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); - nfs_list_add_request(req, &data->pages); - ClearPageError(req->wb_page); - *pages++ = req->wb_page; + nfs_readpage_release(req); } - req = nfs_list_entry(data->pages.next); - - return nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0); -out_bad: - nfs_async_read_error(head); - return ret; } +static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops = { + .error_cleanup = nfs_async_read_error, + .completion = nfs_read_completion, +}; + /* * This is the callback from RPC telling us whether a reply was * received or some error occurred (timeout or socket shutdown). */ -int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data) +static int nfs_readpage_done(struct rpc_task *task, struct nfs_pgio_data *data, + struct inode *inode) { - int status; - - dprintk("NFS: %s: %5u, (status %d)\n", __func__, task->tk_pid, - task->tk_status); - - status = NFS_PROTO(data->inode)->read_done(task, data); + int status = NFS_PROTO(inode)->read_done(task, data); if (status != 0) return status; - nfs_add_stats(data->inode, NFSIOS_SERVERREADBYTES, data->res.count); + nfs_add_stats(inode, NFSIOS_SERVERREADBYTES, data->res.count); if (task->tk_status == -ESTALE) { - set_bit(NFS_INO_STALE, &NFS_I(data->inode)->flags); - nfs_mark_for_revalidate(data->inode); + set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); + nfs_mark_for_revalidate(inode); } return 0; } -static void nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data) +static void nfs_readpage_retry(struct rpc_task *task, struct nfs_pgio_data *data) { - struct nfs_readargs *argp = &data->args; - struct nfs_readres *resp = &data->res; - - if (resp->eof || resp->count == argp->count) - return; + struct nfs_pgio_args *argp = &data->args; + struct nfs_pgio_res *resp = &data->res; /* This is a short read! */ - nfs_inc_stats(data->inode, NFSIOS_SHORTREAD); + nfs_inc_stats(data->header->inode, NFSIOS_SHORTREAD); /* Has the server at least made some progress? */ - if (resp->count == 0) + if (resp->count == 0) { + nfs_set_pgio_error(data->header, -EIO, argp->offset); return; - + } /* Yes, so retry the read at the end of the data */ + data->mds_offset += resp->count; argp->offset += resp->count; argp->pgbase += resp->count; argp->count -= resp->count; - nfs_restart_rpc(task, NFS_SERVER(data->inode)->nfs_client); -} - -/* - * Handle a read reply that fills part of a page. - */ -static void nfs_readpage_result_partial(struct rpc_task *task, void *calldata) -{ - struct nfs_read_data *data = calldata; - - if (nfs_readpage_result(task, data) != 0) - return; - if (task->tk_status < 0) - return; - - nfs_readpage_truncate_uninitialised_page(data); - nfs_readpage_retry(task, data); + rpc_restart_call_prepare(task); } -static void nfs_readpage_release_partial(void *calldata) +static void nfs_readpage_result(struct rpc_task *task, struct nfs_pgio_data *data) { - struct nfs_read_data *data = calldata; - struct nfs_page *req = data->req; - struct page *page = req->wb_page; - int status = data->task.tk_status; + struct nfs_pgio_header *hdr = data->header; - if (status < 0) - SetPageError(page); + if (data->res.eof) { + loff_t bound; - if (atomic_dec_and_test(&req->wb_complete)) { - if (!PageError(page)) - SetPageUptodate(page); - nfs_readpage_release(req); - } - nfs_readdata_release(calldata); -} - -#if defined(CONFIG_NFS_V4_1) -void nfs_read_prepare(struct rpc_task *task, void *calldata) -{ - struct nfs_read_data *data = calldata; - - if (nfs4_setup_sequence(NFS_SERVER(data->inode), - &data->args.seq_args, &data->res.seq_res, - 0, task)) - return; - rpc_call_start(task); -} -#endif /* CONFIG_NFS_V4_1 */ - -static const struct rpc_call_ops nfs_read_partial_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_read_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_readpage_result_partial, - .rpc_release = nfs_readpage_release_partial, -}; - -static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data) -{ - unsigned int count = data->res.count; - unsigned int base = data->args.pgbase; - struct page **pages; - - if (data->res.eof) - count = data->args.count; - if (unlikely(count == 0)) - return; - pages = &data->args.pages[base >> PAGE_CACHE_SHIFT]; - base &= ~PAGE_CACHE_MASK; - count += base; - for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++) - SetPageUptodate(*pages); - if (count == 0) - return; - /* Was this a short read? */ - if (data->res.eof || data->res.count == data->args.count) - SetPageUptodate(*pages); -} - -/* - * This is the callback from RPC telling us whether a reply was - * received or some error occurred (timeout or socket shutdown). - */ -static void nfs_readpage_result_full(struct rpc_task *task, void *calldata) -{ - struct nfs_read_data *data = calldata; - - if (nfs_readpage_result(task, data) != 0) - return; - if (task->tk_status < 0) - return; - /* - * Note: nfs_readpage_retry may change the values of - * data->args. In the multi-page case, we therefore need - * to ensure that we call nfs_readpage_set_pages_uptodate() - * first. - */ - nfs_readpage_truncate_uninitialised_page(data); - nfs_readpage_set_pages_uptodate(data); - nfs_readpage_retry(task, data); -} - -static void nfs_readpage_release_full(void *calldata) -{ - struct nfs_read_data *data = calldata; - - while (!list_empty(&data->pages)) { - struct nfs_page *req = nfs_list_entry(data->pages.next); - - nfs_list_remove_request(req); - nfs_readpage_release(req); - } - nfs_readdata_release(calldata); + bound = data->args.offset + data->res.count; + spin_lock(&hdr->lock); + if (bound < hdr->io_start + hdr->good_bytes) { + set_bit(NFS_IOHDR_EOF, &hdr->flags); + clear_bit(NFS_IOHDR_ERROR, &hdr->flags); + hdr->good_bytes = bound - hdr->io_start; + } + spin_unlock(&hdr->lock); + } else if (data->res.count != data->args.count) + nfs_readpage_retry(task, data); } -static const struct rpc_call_ops nfs_read_full_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_read_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_readpage_result_full, - .rpc_release = nfs_readpage_release_full, -}; - /* * Read a page over NFS. * We read the page synchronously in the following case: @@ -503,11 +267,11 @@ static const struct rpc_call_ops nfs_read_full_ops = { int nfs_readpage(struct file *file, struct page *page) { struct nfs_open_context *ctx; - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; int error; dprintk("NFS: nfs_readpage (%p %ld@%lu)\n", - page, PAGE_CACHE_SIZE, page->index); + page, PAGE_CACHE_SIZE, page_file_index(page)); nfs_inc_stats(inode, NFSIOS_VFSREADPAGE); nfs_add_stats(inode, NFSIOS_READPAGES, 1); @@ -561,7 +325,6 @@ static int readpage_async_filler(void *data, struct page *page) { struct nfs_readdesc *desc = (struct nfs_readdesc *)data; - struct inode *inode = page->mapping->host; struct nfs_page *new; unsigned int len; int error; @@ -570,7 +333,7 @@ readpage_async_filler(void *data, struct page *page) if (len == 0) return nfs_return_empty_page(page); - new = nfs_create_request(desc->ctx, inode, page, 0, len); + new = nfs_create_request(desc->ctx, page, NULL, 0, len); if (IS_ERR(new)) goto out_error; @@ -583,7 +346,6 @@ readpage_async_filler(void *data, struct page *page) return 0; out_error: error = PTR_ERR(new); - SetPageError(page); out_unlock: unlock_page(page); return error; @@ -597,14 +359,12 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, .pgio = &pgio, }; struct inode *inode = mapping->host; - struct nfs_server *server = NFS_SERVER(inode); - size_t rsize = server->rsize; unsigned long npages; int ret = -ESTALE; - dprintk("NFS: nfs_readpages (%s/%Ld %d)\n", + dprintk("NFS: nfs_readpages (%s/%Lu %d)\n", inode->i_sb->s_id, - (long long)NFS_FILEID(inode), + (unsigned long long)NFS_FILEID(inode), nr_pages); nfs_inc_stats(inode, NFSIOS_VFSREADPAGES); @@ -626,15 +386,13 @@ int nfs_readpages(struct file *filp, struct address_space *mapping, if (ret == 0) goto read_complete; /* all pages were read */ - pnfs_update_layout(inode, desc.ctx, IOMODE_READ); - if (rsize < PAGE_CACHE_SIZE) - nfs_pageio_init(&pgio, inode, nfs_pagein_multi, rsize, 0); - else - nfs_pageio_init(&pgio, inode, nfs_pagein_one, rsize, 0); + nfs_pageio_init_read(&pgio, inode, false, + &nfs_async_read_completion_ops); ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc); nfs_pageio_complete(&pgio); + NFS_I(inode)->read_io += pgio.pg_bytes_written; npages = (pgio.pg_bytes_written + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; nfs_add_stats(inode, NFSIOS_READPAGES, npages); read_complete: @@ -646,22 +404,25 @@ out: int __init nfs_init_readpagecache(void) { nfs_rdata_cachep = kmem_cache_create("nfs_read_data", - sizeof(struct nfs_read_data), + sizeof(struct nfs_rw_header), 0, SLAB_HWCACHE_ALIGN, NULL); if (nfs_rdata_cachep == NULL) return -ENOMEM; - nfs_rdata_mempool = mempool_create_slab_pool(MIN_POOL_READ, - nfs_rdata_cachep); - if (nfs_rdata_mempool == NULL) - return -ENOMEM; - return 0; } void nfs_destroy_readpagecache(void) { - mempool_destroy(nfs_rdata_mempool); kmem_cache_destroy(nfs_rdata_cachep); } + +static const struct nfs_rw_ops nfs_rw_read_ops = { + .rw_mode = FMODE_READ, + .rw_alloc_header = nfs_readhdr_alloc, + .rw_free_header = nfs_readhdr_free, + .rw_done = nfs_readpage_done, + .rw_result = nfs_readpage_result, + .rw_initiate = nfs_initiate_read, +}; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 0a42e8f4adc..084af1060d7 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -31,6 +31,7 @@ #include <linux/errno.h> #include <linux/unistd.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/addr.h> #include <linux/sunrpc/stats.h> #include <linux/sunrpc/metrics.h> #include <linux/sunrpc/xprtsock.h> @@ -39,10 +40,8 @@ #include <linux/nfs_mount.h> #include <linux/nfs4_mount.h> #include <linux/lockd/bind.h> -#include <linux/smp_lock.h> #include <linux/seq_file.h> #include <linux/mount.h> -#include <linux/mnt_namespace.h> #include <linux/namei.h> #include <linux/nfs_idmap.h> #include <linux/vfs.h> @@ -54,8 +53,9 @@ #include <linux/nfs_xdr.h> #include <linux/magic.h> #include <linux/parser.h> +#include <linux/nsproxy.h> +#include <linux/rcupdate.h> -#include <asm/system.h> #include <asm/uaccess.h> #include "nfs4_fs.h" @@ -64,8 +64,18 @@ #include "iostat.h" #include "internal.h" #include "fscache.h" +#include "nfs4session.h" +#include "pnfs.h" +#include "nfs.h" #define NFSDBG_FACILITY NFSDBG_VFS +#define NFS_TEXT_DATA 1 + +#if IS_ENABLED(CONFIG_NFS_V3) +#define NFS_DEFAULT_VERSION 3 +#else +#define NFS_DEFAULT_VERSION 2 +#endif enum { /* Mount options that take no arguments */ @@ -74,13 +84,13 @@ enum { Opt_cto, Opt_nocto, Opt_ac, Opt_noac, Opt_lock, Opt_nolock, - Opt_v2, Opt_v3, Opt_v4, Opt_udp, Opt_tcp, Opt_rdma, Opt_acl, Opt_noacl, Opt_rdirplus, Opt_nordirplus, Opt_sharecache, Opt_nosharecache, Opt_resvport, Opt_noresvport, Opt_fscache, Opt_nofscache, + Opt_migration, Opt_nomigration, /* Mount options that take integer arguments */ Opt_port, @@ -92,10 +102,10 @@ enum { Opt_namelen, Opt_mountport, Opt_mountvers, - Opt_nfsvers, Opt_minorversion, /* Mount options that take string arguments */ + Opt_nfsvers, Opt_sec, Opt_proto, Opt_mountproto, Opt_mounthost, Opt_addr, Opt_mountaddr, Opt_clientaddr, Opt_lookupcache, @@ -127,9 +137,6 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_noac, "noac" }, { Opt_lock, "lock" }, { Opt_nolock, "nolock" }, - { Opt_v2, "v2" }, - { Opt_v3, "v3" }, - { Opt_v4, "v4" }, { Opt_udp, "udp" }, { Opt_tcp, "tcp" }, { Opt_rdma, "rdma" }, @@ -143,6 +150,8 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_noresvport, "noresvport" }, { Opt_fscache, "fsc" }, { Opt_nofscache, "nofsc" }, + { Opt_migration, "migration" }, + { Opt_nomigration, "nomigration" }, { Opt_port, "port=%s" }, { Opt_rsize, "rsize=%s" }, @@ -158,9 +167,10 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_namelen, "namlen=%s" }, { Opt_mountport, "mountport=%s" }, { Opt_mountvers, "mountvers=%s" }, + { Opt_minorversion, "minorversion=%s" }, + { Opt_nfsvers, "nfsvers=%s" }, { Opt_nfsvers, "vers=%s" }, - { Opt_minorversion, "minorversion=%s" }, { Opt_sec, "sec=%s" }, { Opt_proto, "proto=%s" }, @@ -174,6 +184,9 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_fscache_uniq, "fsc=%s" }, { Opt_local_lock, "local_lock=%s" }, + /* The following needs to be listed after all other options */ + { Opt_nfsvers, "v%s" }, + { Opt_err, NULL } }; @@ -254,120 +267,101 @@ static match_table_t nfs_local_lock_tokens = { { Opt_local_lock_err, NULL } }; +enum { + Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0, + Opt_vers_4_1, Opt_vers_4_2, + + Opt_vers_err +}; + +static match_table_t nfs_vers_tokens = { + { Opt_vers_2, "2" }, + { Opt_vers_3, "3" }, + { Opt_vers_4, "4" }, + { Opt_vers_4_0, "4.0" }, + { Opt_vers_4_1, "4.1" }, + { Opt_vers_4_2, "4.2" }, + + { Opt_vers_err, NULL } +}; -static void nfs_umount_begin(struct super_block *); -static int nfs_statfs(struct dentry *, struct kstatfs *); -static int nfs_show_options(struct seq_file *, struct vfsmount *); -static int nfs_show_stats(struct seq_file *, struct vfsmount *); -static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data); -static void nfs_put_super(struct super_block *); -static void nfs_kill_super(struct super_block *); -static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); -static struct file_system_type nfs_fs_type = { +struct file_system_type nfs_fs_type = { .owner = THIS_MODULE, .name = "nfs", - .get_sb = nfs_get_sb, + .mount = nfs_fs_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; +MODULE_ALIAS_FS("nfs"); +EXPORT_SYMBOL_GPL(nfs_fs_type); struct file_system_type nfs_xdev_fs_type = { .owner = THIS_MODULE, .name = "nfs", .mount = nfs_xdev_mount, .kill_sb = nfs_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; -static const struct super_operations nfs_sops = { +const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs_write_inode, + .drop_inode = nfs_drop_inode, .put_super = nfs_put_super, .statfs = nfs_statfs, .evict_inode = nfs_evict_inode, .umount_begin = nfs_umount_begin, .show_options = nfs_show_options, + .show_devname = nfs_show_devname, + .show_path = nfs_show_path, .show_stats = nfs_show_stats, .remount_fs = nfs_remount, }; +EXPORT_SYMBOL_GPL(nfs_sops); -#ifdef CONFIG_NFS_V4 -static int nfs4_validate_text_mount_data(void *options, +#if IS_ENABLED(CONFIG_NFS_V4) +static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); +static int nfs4_validate_mount_data(void *options, struct nfs_parsed_mount_data *args, const char *dev_name); -static int nfs4_try_mount(int flags, const char *dev_name, - struct nfs_parsed_mount_data *data, struct vfsmount *mnt); -static int nfs4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); -static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); -static struct dentry *nfs4_xdev_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); -static int nfs4_referral_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); -static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data); -static void nfs4_kill_super(struct super_block *sb); - -static struct file_system_type nfs4_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .get_sb = nfs4_get_sb, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; - -static struct file_system_type nfs4_remote_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_mount, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; -struct file_system_type nfs4_xdev_fs_type = { +struct file_system_type nfs4_fs_type = { .owner = THIS_MODULE, .name = "nfs4", - .mount = nfs4_xdev_mount, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, + .mount = nfs_fs_mount, + .kill_sb = nfs_kill_super, + .fs_flags = FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA, }; +MODULE_ALIAS_FS("nfs4"); +MODULE_ALIAS("nfs4"); +EXPORT_SYMBOL_GPL(nfs4_fs_type); -static struct file_system_type nfs4_remote_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .mount = nfs4_remote_referral_mount, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; +static int __init register_nfs4_fs(void) +{ + return register_filesystem(&nfs4_fs_type); +} -struct file_system_type nfs4_referral_fs_type = { - .owner = THIS_MODULE, - .name = "nfs4", - .get_sb = nfs4_referral_get_sb, - .kill_sb = nfs4_kill_super, - .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, -}; +static void unregister_nfs4_fs(void) +{ + unregister_filesystem(&nfs4_fs_type); +} +#else +static int __init register_nfs4_fs(void) +{ + return 0; +} -static const struct super_operations nfs4_sops = { - .alloc_inode = nfs_alloc_inode, - .destroy_inode = nfs_destroy_inode, - .write_inode = nfs_write_inode, - .put_super = nfs_put_super, - .statfs = nfs_statfs, - .evict_inode = nfs4_evict_inode, - .umount_begin = nfs_umount_begin, - .show_options = nfs_show_options, - .show_stats = nfs_show_stats, - .remount_fs = nfs_remount, -}; +static void unregister_nfs4_fs(void) +{ +} #endif static struct shrinker acl_shrinker = { - .shrink = nfs_access_cache_shrinker, + .count_objects = nfs_access_cache_count, + .scan_objects = nfs_access_cache_scan, .seeks = DEFAULT_SEEKS, }; @@ -382,21 +376,18 @@ int __init register_nfs_fs(void) if (ret < 0) goto error_0; - ret = nfs_register_sysctl(); + ret = register_nfs4_fs(); if (ret < 0) goto error_1; -#ifdef CONFIG_NFS_V4 - ret = register_filesystem(&nfs4_fs_type); + + ret = nfs_register_sysctl(); if (ret < 0) goto error_2; -#endif register_shrinker(&acl_shrinker); return 0; -#ifdef CONFIG_NFS_V4 error_2: - nfs_unregister_sysctl(); -#endif + unregister_nfs4_fs(); error_1: unregister_filesystem(&nfs_fs_type); error_0: @@ -409,10 +400,8 @@ error_0: void __exit unregister_nfs_fs(void) { unregister_shrinker(&acl_shrinker); -#ifdef CONFIG_NFS_V4 - unregister_filesystem(&nfs4_fs_type); -#endif nfs_unregister_sysctl(); + unregister_nfs4_fs(); unregister_filesystem(&nfs_fs_type); } @@ -423,6 +412,7 @@ void nfs_sb_active(struct super_block *sb) if (atomic_inc_return(&server->active) == 1) atomic_inc(&sb->s_active); } +EXPORT_SYMBOL_GPL(nfs_sb_active); void nfs_sb_deactive(struct super_block *sb) { @@ -431,11 +421,12 @@ void nfs_sb_deactive(struct super_block *sb) if (atomic_dec_and_test(&server->active)) deactivate_super(sb); } +EXPORT_SYMBOL_GPL(nfs_sb_deactive); /* * Deliver file system statistics to userspace */ -static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) +int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct nfs_server *server = NFS_SB(dentry->d_sb); unsigned char blockbits; @@ -496,6 +487,7 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf) dprintk("%s: statfs error = %d\n", __func__, -error); return error; } +EXPORT_SYMBOL_GPL(nfs_statfs); /* * Map the security flavour number to a name @@ -505,7 +497,8 @@ static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour) static const struct { rpc_authflavor_t flavour; const char *str; - } sec_flavours[] = { + } sec_flavours[NFS_AUTH_INFO_MAX_FLAVORS] = { + /* update NFS_AUTH_INFO_MAX_FLAVORS when this list changes! */ { RPC_AUTH_NULL, "null" }, { RPC_AUTH_UNIX, "sys" }, { RPC_AUTH_GSS_KRB5, "krb5" }, @@ -593,20 +586,21 @@ static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, if (nfss->mountd_version || showdefaults) seq_printf(m, ",mountvers=%u", nfss->mountd_version); - if (nfss->mountd_port || showdefaults) + if ((nfss->mountd_port && + nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || + showdefaults) seq_printf(m, ",mountport=%u", nfss->mountd_port); nfs_show_mountd_netid(m, nfss, showdefaults); } -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) { struct nfs_client *clp = nfss->nfs_client; seq_printf(m, ",clientaddr=%s", clp->cl_ipaddr); - seq_printf(m, ",minorversion=%u", clp->cl_minorversion); } #else static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, @@ -615,6 +609,15 @@ static void nfs_show_nfsv4_options(struct seq_file *m, struct nfs_server *nfss, } #endif +static void nfs_show_nfs_version(struct seq_file *m, + unsigned int version, + unsigned int minorversion) +{ + seq_printf(m, ",vers=%u", version); + if (version == 4) + seq_printf(m, ".%u", minorversion); +} + /* * Describe the mount options in force on this server representation */ @@ -642,7 +645,7 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, u32 version = clp->rpc_ops->version; int local_flock, local_fcntl; - seq_printf(m, ",vers=%u", version); + nfs_show_nfs_version(m, version, clp->cl_minorversion); seq_printf(m, ",rsize=%u", nfss->rsize); seq_printf(m, ",wsize=%u", nfss->wsize); if (nfss->bsize != 0) @@ -662,8 +665,10 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, else seq_puts(m, nfs_infop->nostr); } + rcu_read_lock(); seq_printf(m, ",proto=%s", rpc_peeraddr2str(nfss->client, RPC_DISPLAY_NETID)); + rcu_read_unlock(); if (version == 4) { if (nfss->port != NFS_PORT) seq_printf(m, ",port=%u", nfss->port); @@ -683,6 +688,9 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, if (nfss->options & NFS_OPTION_FSCACHE) seq_printf(m, ",fsc"); + if (nfss->options & NFS_OPTION_MIGRATION) + seq_printf(m, ",migration"); + if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) seq_printf(m, ",lookupcache=none"); @@ -706,26 +714,96 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, /* * Describe the mount options on this VFS mountpoint */ -static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) +int nfs_show_options(struct seq_file *m, struct dentry *root) { - struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + struct nfs_server *nfss = NFS_SB(root->d_sb); nfs_show_mount_options(m, nfss, 0); + rcu_read_lock(); seq_printf(m, ",addr=%s", rpc_peeraddr2str(nfss->nfs_client->cl_rpcclient, RPC_DISPLAY_ADDR)); + rcu_read_unlock(); return 0; } +EXPORT_SYMBOL_GPL(nfs_show_options); + +#if IS_ENABLED(CONFIG_NFS_V4) +#ifdef CONFIG_NFS_V4_1 +static void show_sessions(struct seq_file *m, struct nfs_server *server) +{ + if (nfs4_has_session(server->nfs_client)) + seq_printf(m, ",sessions"); +} +#else +static void show_sessions(struct seq_file *m, struct nfs_server *server) {} +#endif +#endif + +#ifdef CONFIG_NFS_V4_1 +static void show_pnfs(struct seq_file *m, struct nfs_server *server) +{ + seq_printf(m, ",pnfs="); + if (server->pnfs_curr_ld) + seq_printf(m, "%s", server->pnfs_curr_ld->name); + else + seq_printf(m, "not configured"); +} + +static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) +{ + if (nfss->nfs_client && nfss->nfs_client->cl_implid) { + struct nfs41_impl_id *impl_id = nfss->nfs_client->cl_implid; + seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s'," + "date='%llu,%u'", + impl_id->name, impl_id->domain, + impl_id->date.seconds, impl_id->date.nseconds); + } +} +#else +#if IS_ENABLED(CONFIG_NFS_V4) +static void show_pnfs(struct seq_file *m, struct nfs_server *server) +{ +} +#endif +static void show_implementation_id(struct seq_file *m, struct nfs_server *nfss) +{ +} +#endif + +int nfs_show_devname(struct seq_file *m, struct dentry *root) +{ + char *page = (char *) __get_free_page(GFP_KERNEL); + char *devname, *dummy; + int err = 0; + if (!page) + return -ENOMEM; + devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); + if (IS_ERR(devname)) + err = PTR_ERR(devname); + else + seq_escape(m, devname, " \t\n\\"); + free_page((unsigned long)page); + return err; +} +EXPORT_SYMBOL_GPL(nfs_show_devname); + +int nfs_show_path(struct seq_file *m, struct dentry *dentry) +{ + seq_puts(m, "/"); + return 0; +} +EXPORT_SYMBOL_GPL(nfs_show_path); /* * Present statistical information for this VFS mountpoint */ -static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) +int nfs_show_stats(struct seq_file *m, struct dentry *root) { int i, cpu; - struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + struct nfs_server *nfss = NFS_SB(root->d_sb); struct rpc_auth *auth = nfss->client->cl_auth; struct nfs_iostats totals = { }; @@ -735,14 +813,16 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) * Display all mount option settings */ seq_printf(m, "\n\topts:\t"); - seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); - seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); - seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); - seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); + seq_puts(m, root->d_sb->s_flags & MS_RDONLY ? "ro" : "rw"); + seq_puts(m, root->d_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); + seq_puts(m, root->d_sb->s_flags & MS_NOATIME ? ",noatime" : ""); + seq_puts(m, root->d_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); nfs_show_mount_options(m, nfss, 1); seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); + show_implementation_id(m, nfss); + seq_printf(m, "\n\tcaps:\t"); seq_printf(m, "caps=0x%x", nfss->caps); seq_printf(m, ",wtmult=%u", nfss->wtmult); @@ -750,12 +830,15 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) seq_printf(m, ",bsize=%u", nfss->bsize); seq_printf(m, ",namlen=%u", nfss->namelen); -#ifdef CONFIG_NFS_V4 +#if IS_ENABLED(CONFIG_NFS_V4) if (nfss->nfs_client->rpc_ops->version == 4) { seq_printf(m, "\n\tnfsv4:\t"); seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); + seq_printf(m, ",bm2=0x%x", nfss->attr_bitmask[2]); seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); + show_sessions(m, nfss); + show_pnfs(m, nfss); } #endif @@ -806,12 +889,13 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) return 0; } +EXPORT_SYMBOL_GPL(nfs_show_stats); /* * Begin unmount by attempting to remove all automounted mountpoints we added * in response to xdev traversals and referrals */ -static void nfs_umount_begin(struct super_block *sb) +void nfs_umount_begin(struct super_block *sb) { struct nfs_server *server; struct rpc_clnt *rpc; @@ -825,8 +909,9 @@ static void nfs_umount_begin(struct super_block *sb) if (!IS_ERR(rpc)) rpc_killall_tasks(rpc); } +EXPORT_SYMBOL_GPL(nfs_umount_begin); -static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int version) +static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) { struct nfs_parsed_mount_data *data; @@ -839,14 +924,28 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(unsigned int ve data->mount_server.port = NFS_UNSPEC_PORT; data->nfs_server.port = NFS_UNSPEC_PORT; data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->auth_flavors[0] = RPC_AUTH_UNIX; - data->auth_flavor_len = 1; - data->version = version; + data->selected_flavor = RPC_AUTH_MAXFLAVOR; data->minorversion = 0; + data->need_mount = true; + data->net = current->nsproxy->net_ns; + security_init_mnt_opts(&data->lsm_opts); } return data; } +static void nfs_free_parsed_mount_data(struct nfs_parsed_mount_data *data) +{ + if (data) { + kfree(data->client_address); + kfree(data->mount_server.hostname); + kfree(data->nfs_server.export_path); + kfree(data->nfs_server.hostname); + kfree(data->fscache_uniq); + security_free_mnt_opts(&data->lsm_opts); + kfree(data); + } +} + /* * Sanity-check a server address provided by the mount command. * @@ -921,57 +1020,170 @@ static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) } /* + * Add 'flavor' to 'auth_info' if not already present. + * Returns true if 'flavor' ends up in the list, false otherwise + */ +static bool nfs_auth_info_add(struct nfs_auth_info *auth_info, + rpc_authflavor_t flavor) +{ + unsigned int i; + unsigned int max_flavor_len = (sizeof(auth_info->flavors) / + sizeof(auth_info->flavors[0])); + + /* make sure this flavor isn't already in the list */ + for (i = 0; i < auth_info->flavor_len; i++) { + if (flavor == auth_info->flavors[i]) + return true; + } + + if (auth_info->flavor_len + 1 >= max_flavor_len) { + dfprintk(MOUNT, "NFS: too many sec= flavors\n"); + return false; + } + + auth_info->flavors[auth_info->flavor_len++] = flavor; + return true; +} + +/* + * Return true if 'match' is in auth_info or auth_info is empty. + * Return false otherwise. + */ +bool nfs_auth_info_match(const struct nfs_auth_info *auth_info, + rpc_authflavor_t match) +{ + int i; + + if (!auth_info->flavor_len) + return true; + + for (i = 0; i < auth_info->flavor_len; i++) { + if (auth_info->flavors[i] == match) + return true; + } + return false; +} +EXPORT_SYMBOL_GPL(nfs_auth_info_match); + +/* * Parse the value of the 'sec=' option. */ static int nfs_parse_security_flavors(char *value, struct nfs_parsed_mount_data *mnt) { substring_t args[MAX_OPT_ARGS]; + rpc_authflavor_t pseudoflavor; + char *p; dfprintk(MOUNT, "NFS: parsing sec=%s option\n", value); - switch (match_token(value, nfs_secflavor_tokens, args)) { - case Opt_sec_none: - mnt->auth_flavors[0] = RPC_AUTH_NULL; - break; - case Opt_sec_sys: - mnt->auth_flavors[0] = RPC_AUTH_UNIX; - break; - case Opt_sec_krb5: - mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5; - break; - case Opt_sec_krb5i: - mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I; - break; - case Opt_sec_krb5p: - mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P; - break; - case Opt_sec_lkey: - mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY; + while ((p = strsep(&value, ":")) != NULL) { + switch (match_token(p, nfs_secflavor_tokens, args)) { + case Opt_sec_none: + pseudoflavor = RPC_AUTH_NULL; + break; + case Opt_sec_sys: + pseudoflavor = RPC_AUTH_UNIX; + break; + case Opt_sec_krb5: + pseudoflavor = RPC_AUTH_GSS_KRB5; + break; + case Opt_sec_krb5i: + pseudoflavor = RPC_AUTH_GSS_KRB5I; + break; + case Opt_sec_krb5p: + pseudoflavor = RPC_AUTH_GSS_KRB5P; + break; + case Opt_sec_lkey: + pseudoflavor = RPC_AUTH_GSS_LKEY; + break; + case Opt_sec_lkeyi: + pseudoflavor = RPC_AUTH_GSS_LKEYI; + break; + case Opt_sec_lkeyp: + pseudoflavor = RPC_AUTH_GSS_LKEYP; + break; + case Opt_sec_spkm: + pseudoflavor = RPC_AUTH_GSS_SPKM; + break; + case Opt_sec_spkmi: + pseudoflavor = RPC_AUTH_GSS_SPKMI; + break; + case Opt_sec_spkmp: + pseudoflavor = RPC_AUTH_GSS_SPKMP; + break; + default: + dfprintk(MOUNT, + "NFS: sec= option '%s' not recognized\n", p); + return 0; + } + + if (!nfs_auth_info_add(&mnt->auth_info, pseudoflavor)) + return 0; + } + + return 1; +} + +static int nfs_parse_version_string(char *string, + struct nfs_parsed_mount_data *mnt, + substring_t *args) +{ + mnt->flags &= ~NFS_MOUNT_VER3; + switch (match_token(string, nfs_vers_tokens, args)) { + case Opt_vers_2: + mnt->version = 2; break; - case Opt_sec_lkeyi: - mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI; + case Opt_vers_3: + mnt->flags |= NFS_MOUNT_VER3; + mnt->version = 3; break; - case Opt_sec_lkeyp: - mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP; + case Opt_vers_4: + /* Backward compatibility option. In future, + * the mount program should always supply + * a NFSv4 minor version number. + */ + mnt->version = 4; break; - case Opt_sec_spkm: - mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM; + case Opt_vers_4_0: + mnt->version = 4; + mnt->minorversion = 0; break; - case Opt_sec_spkmi: - mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI; + case Opt_vers_4_1: + mnt->version = 4; + mnt->minorversion = 1; break; - case Opt_sec_spkmp: - mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP; + case Opt_vers_4_2: + mnt->version = 4; + mnt->minorversion = 2; break; default: return 0; } - - mnt->auth_flavor_len = 1; return 1; } +static int nfs_get_option_str(substring_t args[], char **option) +{ + kfree(*option); + *option = match_strdup(args); + return !*option; +} + +static int nfs_get_option_ul(substring_t args[], unsigned long *option) +{ + int rc; + char *string; + + string = match_strdup(args); + if (string == NULL) + return -ENOMEM; + rc = kstrtoul(string, 10, option); + kfree(string); + + return rc; +} + /* * Error-check and convert a string of mount options from user space into * a data structure. The whole mount string is processed; bad options are @@ -1056,20 +1268,6 @@ static int nfs_parse_mount_options(char *raw, mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK | NFS_MOUNT_LOCAL_FCNTL); break; - case Opt_v2: - mnt->flags &= ~NFS_MOUNT_VER3; - mnt->version = 2; - break; - case Opt_v3: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; - break; -#ifdef CONFIG_NFS_V4 - case Opt_v4: - mnt->flags &= ~NFS_MOUNT_VER3; - mnt->version = 4; - break; -#endif case Opt_udp: mnt->flags &= ~NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; @@ -1117,187 +1315,93 @@ static int nfs_parse_mount_options(char *raw, kfree(mnt->fscache_uniq); mnt->fscache_uniq = NULL; break; + case Opt_migration: + mnt->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + mnt->options &= NFS_OPTION_MIGRATION; + break; /* * options that take numeric values */ case Opt_port: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0 || option > USHRT_MAX) + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) goto out_invalid_value; mnt->nfs_server.port = option; break; case Opt_rsize: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->rsize = option; break; case Opt_wsize: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->wsize = option; break; case Opt_bsize: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->bsize = option; break; case Opt_timeo: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0 || option == 0) + if (nfs_get_option_ul(args, &option) || option == 0) goto out_invalid_value; mnt->timeo = option; break; case Opt_retrans: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0 || option == 0) + if (nfs_get_option_ul(args, &option) || option == 0) goto out_invalid_value; mnt->retrans = option; break; case Opt_acregmin: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->acregmin = option; break; case Opt_acregmax: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->acregmax = option; break; case Opt_acdirmin: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->acdirmin = option; break; case Opt_acdirmax: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->acdirmax = option; break; case Opt_actimeo: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->acregmin = mnt->acregmax = mnt->acdirmin = mnt->acdirmax = option; break; case Opt_namelen: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; mnt->namlen = option; break; case Opt_mountport: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0 || option > USHRT_MAX) + if (nfs_get_option_ul(args, &option) || + option > USHRT_MAX) goto out_invalid_value; mnt->mount_server.port = option; break; case Opt_mountvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0 || + if (nfs_get_option_ul(args, &option) || option < NFS_MNT_VERSION || option > NFS_MNT3_VERSION) goto out_invalid_value; mnt->mount_server.version = option; break; - case Opt_nfsvers: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) - goto out_invalid_value; - switch (option) { - case NFS2_VERSION: - mnt->flags &= ~NFS_MOUNT_VER3; - mnt->version = 2; - break; - case NFS3_VERSION: - mnt->flags |= NFS_MOUNT_VER3; - mnt->version = 3; - break; -#ifdef CONFIG_NFS_V4 - case NFS4_VERSION: - mnt->flags &= ~NFS_MOUNT_VER3; - mnt->version = 4; - break; -#endif - default: - goto out_invalid_value; - } - break; case Opt_minorversion: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - rc = strict_strtoul(string, 10, &option); - kfree(string); - if (rc != 0) + if (nfs_get_option_ul(args, &option)) goto out_invalid_value; if (option > NFS4_MAX_MINOR_VERSION) goto out_invalid_value; @@ -1307,6 +1411,15 @@ static int nfs_parse_mount_options(char *raw, /* * options that take text values */ + case Opt_nfsvers: + string = match_strdup(args); + if (string == NULL) + goto out_nomem; + rc = nfs_parse_version_string(string, mnt, args); + kfree(string); + if (!rc) + goto out_invalid_value; + break; case Opt_sec: string = match_strdup(args); if (string == NULL) @@ -1333,21 +1446,18 @@ static int nfs_parse_mount_options(char *raw, case Opt_xprt_udp: mnt->flags &= ~NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; - kfree(string); break; case Opt_xprt_tcp6: protofamily = AF_INET6; case Opt_xprt_tcp: mnt->flags |= NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP; - kfree(string); break; case Opt_xprt_rdma: /* vector side protocols to TCP */ mnt->flags |= NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA; xprt_load_transport(string); - kfree(string); break; default: dfprintk(MOUNT, "NFS: unrecognized " @@ -1355,6 +1465,7 @@ static int nfs_parse_mount_options(char *raw, kfree(string); return 0; } + kfree(string); break; case Opt_mountproto: string = match_strdup(args); @@ -1388,7 +1499,7 @@ static int nfs_parse_mount_options(char *raw, if (string == NULL) goto out_nomem; mnt->nfs_server.addrlen = - rpc_pton(string, strlen(string), + rpc_pton(mnt->net, string, strlen(string), (struct sockaddr *) &mnt->nfs_server.address, sizeof(mnt->nfs_server.address)); @@ -1397,25 +1508,20 @@ static int nfs_parse_mount_options(char *raw, goto out_invalid_address; break; case Opt_clientaddr: - string = match_strdup(args); - if (string == NULL) + if (nfs_get_option_str(args, &mnt->client_address)) goto out_nomem; - kfree(mnt->client_address); - mnt->client_address = string; break; case Opt_mounthost: - string = match_strdup(args); - if (string == NULL) + if (nfs_get_option_str(args, + &mnt->mount_server.hostname)) goto out_nomem; - kfree(mnt->mount_server.hostname); - mnt->mount_server.hostname = string; break; case Opt_mountaddr: string = match_strdup(args); if (string == NULL) goto out_nomem; mnt->mount_server.addrlen = - rpc_pton(string, strlen(string), + rpc_pton(mnt->net, string, strlen(string), (struct sockaddr *) &mnt->mount_server.address, sizeof(mnt->mount_server.address)); @@ -1448,11 +1554,8 @@ static int nfs_parse_mount_options(char *raw, }; break; case Opt_fscache_uniq: - string = match_strdup(args); - if (string == NULL) + if (nfs_get_option_str(args, &mnt->fscache_uniq)) goto out_nomem; - kfree(mnt->fscache_uniq); - mnt->fscache_uniq = string; mnt->options |= NFS_OPTION_FSCACHE; break; case Opt_local_lock: @@ -1507,9 +1610,16 @@ static int nfs_parse_mount_options(char *raw, if (!sloppy && invalid_option) return 0; + if (mnt->minorversion && mnt->version != 4) + goto out_minorversion_mismatch; + + if (mnt->options & NFS_OPTION_MIGRATION && + (mnt->version != 4 || mnt->minorversion != 0)) + goto out_migration_misuse; + /* * verify that any proto=/mountproto= options match the address - * familiies in the addr=/mountaddr= options. + * families in the addr=/mountaddr= options. */ if (protofamily != AF_UNSPEC && protofamily != mnt->nfs_server.address.ss_family) @@ -1540,6 +1650,14 @@ out_invalid_address: out_invalid_value: printk(KERN_INFO "NFS: bad mount option value specified: %s\n", p); return 0; +out_minorversion_mismatch: + printk(KERN_INFO "NFS: mount option vers=%u does not support " + "minorversion=%u\n", mnt->version, mnt->minorversion); + return 0; +out_migration_misuse: + printk(KERN_INFO + "NFS: 'migration' not supported for this NFS version\n"); + return 0; out_nomem: printk(KERN_INFO "NFS: not enough memory to parse option\n"); return 0; @@ -1550,60 +1668,51 @@ out_security_failure: } /* - * Match the requested auth flavors with the list returned by - * the server. Returns zero and sets the mount's authentication - * flavor on success; returns -EACCES if server does not support - * the requested flavor. + * Ensure that a specified authtype in args->auth_info is supported by + * the server. Returns 0 and sets args->selected_flavor if it's ok, and + * -EACCES if not. */ -static int nfs_walk_authlist(struct nfs_parsed_mount_data *args, - struct nfs_mount_request *request) +static int nfs_verify_authflavors(struct nfs_parsed_mount_data *args, + rpc_authflavor_t *server_authlist, unsigned int count) { - unsigned int i, j, server_authlist_len = *(request->auth_flav_len); - - /* - * Certain releases of Linux's mountd return an empty - * flavor list. To prevent behavioral regression with - * these servers (ie. rejecting mounts that used to - * succeed), revert to pre-2.6.32 behavior (no checking) - * if the returned flavor list is empty. - */ - if (server_authlist_len == 0) - return 0; + rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; + unsigned int i; /* - * We avoid sophisticated negotiating here, as there are - * plenty of cases where we can get it wrong, providing - * either too little or too much security. + * If the sec= mount option is used, the specified flavor or AUTH_NULL + * must be in the list returned by the server. * - * RFC 2623, section 2.7 suggests we SHOULD prefer the - * flavor listed first. However, some servers list - * AUTH_NULL first. Our caller plants AUTH_SYS, the - * preferred default, in args->auth_flavors[0] if user - * didn't specify sec= mount option. + * AUTH_NULL has a special meaning when it's in the server list - it + * means that the server will ignore the rpc creds, so any flavor + * can be used. */ - for (i = 0; i < args->auth_flavor_len; i++) - for (j = 0; j < server_authlist_len; j++) - if (args->auth_flavors[i] == request->auth_flavs[j]) { - dfprintk(MOUNT, "NFS: using auth flavor %d\n", - request->auth_flavs[j]); - args->auth_flavors[0] = request->auth_flavs[j]; - return 0; - } + for (i = 0; i < count; i++) { + flavor = server_authlist[i]; + + if (nfs_auth_info_match(&args->auth_info, flavor) || + flavor == RPC_AUTH_NULL) + goto out; + } - dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n"); - nfs_umount(request); + dfprintk(MOUNT, + "NFS: specified auth flavors not supported by server\n"); return -EACCES; + +out: + args->selected_flavor = flavor; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); + return 0; } /* * Use the remote server's MOUNT service to request the NFS file handle * corresponding to the provided path. */ -static int nfs_try_mount(struct nfs_parsed_mount_data *args, - struct nfs_fh *root_fh) +static int nfs_request_mount(struct nfs_parsed_mount_data *args, + struct nfs_fh *root_fh, + rpc_authflavor_t *server_authlist, + unsigned int *server_authlist_len) { - rpc_authflavor_t server_authlist[NFS_MAX_SECFLAVORS]; - unsigned int server_authlist_len = ARRAY_SIZE(server_authlist); struct nfs_mount_request request = { .sap = (struct sockaddr *) &args->mount_server.address, @@ -1611,8 +1720,9 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args, .protocol = args->mount_server.protocol, .fh = root_fh, .noresvport = args->flags & NFS_MOUNT_NORESVPORT, - .auth_flav_len = &server_authlist_len, + .auth_flav_len = server_authlist_len, .auth_flavs = server_authlist, + .net = args->net, }; int status; @@ -1654,107 +1764,153 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args, return status; } - /* - * MNTv1 (NFSv2) does not support auth flavor negotiation. - */ - if (args->mount_server.version != NFS_MNT3_VERSION) - return 0; - return nfs_walk_authlist(args, &request); + return 0; } -static int nfs_parse_simple_hostname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) +static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) { - size_t len; - char *colon, *comma; - - colon = strchr(dev_name, ':'); - if (colon == NULL) - goto out_bad_devname; - - len = colon - dev_name; - if (len > maxnamlen) - goto out_hostname; + int status; + unsigned int i; + bool tried_auth_unix = false; + bool auth_null_in_list = false; + struct nfs_server *server = ERR_PTR(-EACCES); + struct nfs_parsed_mount_data *args = mount_info->parsed; + rpc_authflavor_t authlist[NFS_MAX_SECFLAVORS]; + unsigned int authlist_len = ARRAY_SIZE(authlist); + + status = nfs_request_mount(args, mount_info->mntfh, authlist, + &authlist_len); + if (status) + return ERR_PTR(status); - /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(dev_name, len, GFP_KERNEL); - if (!*hostname) - goto out_nomem; + /* + * Was a sec= authflavor specified in the options? First, verify + * whether the server supports it, and then just try to use it if so. + */ + if (args->auth_info.flavor_len > 0) { + status = nfs_verify_authflavors(args, authlist, authlist_len); + dfprintk(MOUNT, "NFS: using auth flavor %u\n", + args->selected_flavor); + if (status) + return ERR_PTR(status); + return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + } - /* kill possible hostname list: not supported */ - comma = strchr(*hostname, ','); - if (comma != NULL) { - if (comma == *hostname) - goto out_bad_devname; - *comma = '\0'; + /* + * No sec= option was provided. RFC 2623, section 2.7 suggests we + * SHOULD prefer the flavor listed first. However, some servers list + * AUTH_NULL first. Avoid ever choosing AUTH_NULL. + */ + for (i = 0; i < authlist_len; ++i) { + rpc_authflavor_t flavor; + struct rpcsec_gss_info info; + + flavor = authlist[i]; + switch (flavor) { + case RPC_AUTH_UNIX: + tried_auth_unix = true; + break; + case RPC_AUTH_NULL: + auth_null_in_list = true; + continue; + default: + if (rpcauth_get_gssinfo(flavor, &info) != 0) + continue; + /* Fallthrough */ + } + dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); + args->selected_flavor = flavor; + server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); + if (!IS_ERR(server)) + return server; } - colon++; - len = strlen(colon); - if (len > maxpathlen) - goto out_path; - *export_path = kstrndup(colon, len, GFP_KERNEL); - if (!*export_path) - goto out_nomem; + /* + * Nothing we tried so far worked. At this point, give up if we've + * already tried AUTH_UNIX or if the server's list doesn't contain + * AUTH_NULL + */ + if (tried_auth_unix || !auth_null_in_list) + return server; - dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); - return 0; + /* Last chance! Try AUTH_UNIX */ + dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); + args->selected_flavor = RPC_AUTH_UNIX; + return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); +} -out_bad_devname: - dfprintk(MOUNT, "NFS: device name not in host:path format\n"); - return -EINVAL; +struct dentry *nfs_try_mount(int flags, const char *dev_name, + struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) +{ + struct nfs_server *server; -out_nomem: - dfprintk(MOUNT, "NFS: not enough memory to parse device name\n"); - return -ENOMEM; + if (mount_info->parsed->need_mount) + server = nfs_try_mount_request(mount_info, nfs_mod); + else + server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); -out_hostname: - dfprintk(MOUNT, "NFS: server hostname too long\n"); - return -ENAMETOOLONG; + if (IS_ERR(server)) + return ERR_CAST(server); -out_path: - dfprintk(MOUNT, "NFS: export pathname too long\n"); - return -ENAMETOOLONG; + return nfs_fs_mount_common(server, flags, dev_name, mount_info, nfs_mod); } +EXPORT_SYMBOL_GPL(nfs_try_mount); /* - * Hostname has square brackets around it because it contains one or - * more colons. We look for the first closing square bracket, and a - * colon must follow it. + * Split "dev_name" into "hostname:export_path". + * + * The leftmost colon demarks the split between the server's hostname + * and the export path. If the hostname starts with a left square + * bracket, then it may contain colons. + * + * Note: caller frees hostname and export path, even on error. */ -static int nfs_parse_protected_hostname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) +static int nfs_parse_devname(const char *dev_name, + char **hostname, size_t maxnamlen, + char **export_path, size_t maxpathlen) { size_t len; - char *start, *end; + char *end; + + /* Is the host name protected with square brakcets? */ + if (*dev_name == '[') { + end = strchr(++dev_name, ']'); + if (end == NULL || end[1] != ':') + goto out_bad_devname; + + len = end - dev_name; + end++; + } else { + char *comma; - start = (char *)(dev_name + 1); + end = strchr(dev_name, ':'); + if (end == NULL) + goto out_bad_devname; + len = end - dev_name; - end = strchr(start, ']'); - if (end == NULL) - goto out_bad_devname; - if (*(end + 1) != ':') - goto out_bad_devname; + /* kill possible hostname list: not supported */ + comma = strchr(dev_name, ','); + if (comma != NULL && comma < end) + *comma = 0; + } - len = end - start; if (len > maxnamlen) goto out_hostname; /* N.B. caller will free nfs_server.hostname in all cases */ - *hostname = kstrndup(start, len, GFP_KERNEL); + *hostname = kstrndup(dev_name, len, GFP_KERNEL); if (*hostname == NULL) goto out_nomem; - - end += 2; - len = strlen(end); + len = strlen(++end); if (len > maxpathlen) goto out_path; *export_path = kstrndup(end, len, GFP_KERNEL); if (!*export_path) goto out_nomem; + dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *export_path); return 0; out_bad_devname: @@ -1775,29 +1931,6 @@ out_path: } /* - * Split "dev_name" into "hostname:export_path". - * - * The leftmost colon demarks the split between the server's hostname - * and the export path. If the hostname starts with a left square - * bracket, then it may contain colons. - * - * Note: caller frees hostname and export path, even on error. - */ -static int nfs_parse_devname(const char *dev_name, - char **hostname, size_t maxnamlen, - char **export_path, size_t maxpathlen) -{ - if (*dev_name == '[') - return nfs_parse_protected_hostname(dev_name, - hostname, maxnamlen, - export_path, maxpathlen); - - return nfs_parse_simple_hostname(dev_name, - hostname, maxnamlen, - export_path, maxpathlen); -} - -/* * Validate the NFS2/NFS3 mount data * - fills in the mount root filehandle * @@ -1813,17 +1946,19 @@ static int nfs_parse_devname(const char *dev_name, * + breaking back: trying proto=udp after proto=tcp, v2 after v3, * mountproto=tcp after mountproto=udp, and so on */ -static int nfs_validate_mount_data(void *options, - struct nfs_parsed_mount_data *args, - struct nfs_fh *mntfh, - const char *dev_name) +static int nfs23_validate_mount_data(void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) { struct nfs_mount_data *data = (struct nfs_mount_data *)options; struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + int extra_flags = NFS_MOUNT_LEGACY_INTERFACE; if (data == NULL) goto out_no_data; + args->version = NFS_DEFAULT_VERSION; switch (data->version) { case 1: data->namlen = 0; @@ -1834,6 +1969,8 @@ static int nfs_validate_mount_data(void *options, goto out_no_v3; data->root.size = NFS2_FHSIZE; memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); + /* Turn off security negotiation */ + extra_flags |= NFS_MOUNT_SECFLAVOUR; case 4: if (data->flags & NFS_MOUNT_SECFLAVOUR) goto out_no_sec; @@ -1861,7 +1998,7 @@ static int nfs_validate_mount_data(void *options, * can deal with. */ args->flags = data->flags & NFS_MOUNT_FLAGMASK; - args->flags |= NFS_MOUNT_LEGACY_INTERFACE; + args->flags |= extra_flags; args->rsize = data->rsize; args->wsize = data->wsize; args->timeo = data->timeo; @@ -1870,9 +2007,11 @@ static int nfs_validate_mount_data(void *options, args->acregmax = data->acregmax; args->acdirmin = data->acdirmin; args->acdirmax = data->acdirmax; + args->need_mount = false; memcpy(sap, &data->addr, sizeof(data->addr)); args->nfs_server.addrlen = sizeof(data->addr); + args->nfs_server.port = ntohs(data->addr.sin_port); if (!nfs_verify_server_address(sap)) goto out_no_address; @@ -1884,7 +2023,9 @@ static int nfs_validate_mount_data(void *options, args->bsize = data->bsize; if (data->flags & NFS_MOUNT_SECFLAVOUR) - args->auth_flavors[0] = data->pseudoflavor; + args->selected_flavor = data->pseudoflavor; + else + args->selected_flavor = RPC_AUTH_UNIX; if (!args->nfs_server.hostname) goto out_nomem; @@ -1921,46 +2062,11 @@ static int nfs_validate_mount_data(void *options, } break; - default: { - int status; - - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - goto out_no_address; - - if (args->version == 4) -#ifdef CONFIG_NFS_V4 - return nfs4_validate_text_mount_data(options, - args, dev_name); -#else - goto out_v4_not_compiled; -#endif - - nfs_set_port(sap, &args->nfs_server.port, 0); - - nfs_set_mount_transport_protocol(args); - - status = nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - PAGE_SIZE, - &args->nfs_server.export_path, - NFS_MAXPATHLEN); - if (!status) - status = nfs_try_mount(args, mntfh); - - kfree(args->nfs_server.export_path); - args->nfs_server.export_path = NULL; - - if (status) - return status; - - break; - } + default: + return NFS_TEXT_DATA; } -#ifndef CONFIG_NFS_V3 +#if !IS_ENABLED(CONFIG_NFS_V3) if (args->version == 3) goto out_v3_not_compiled; #endif /* !CONFIG_NFS_V3 */ @@ -1980,18 +2086,12 @@ out_no_sec: dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n"); return -EINVAL; -#ifndef CONFIG_NFS_V3 +#if !IS_ENABLED(CONFIG_NFS_V3) out_v3_not_compiled: dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n"); return -EPROTONOSUPPORT; #endif /* !CONFIG_NFS_V3 */ -#ifndef CONFIG_NFS_V4 -out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); - return -EPROTONOSUPPORT; -#endif /* !CONFIG_NFS_V4 */ - out_nomem: dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); return -ENOMEM; @@ -2005,15 +2105,104 @@ out_invalid_fh: return -EINVAL; } +#if IS_ENABLED(CONFIG_NFS_V4) +static int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + if (fs_type == &nfs_fs_type) + return nfs23_validate_mount_data(options, args, mntfh, dev_name); + return nfs4_validate_mount_data(options, args, dev_name); +} +#else +static int nfs_validate_mount_data(struct file_system_type *fs_type, + void *options, + struct nfs_parsed_mount_data *args, + struct nfs_fh *mntfh, + const char *dev_name) +{ + return nfs23_validate_mount_data(options, args, mntfh, dev_name); +} +#endif + +static int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + int port = 0; + int max_namelen = PAGE_SIZE; + int max_pathlen = NFS_MAXPATHLEN; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + + if (nfs_parse_mount_options((char *)options, args) == 0) + return -EINVAL; + + if (!nfs_verify_server_address(sap)) + goto out_no_address; + + if (args->version == 4) { +#if IS_ENABLED(CONFIG_NFS_V4) + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; + nfs4_validate_mount_flags(args); +#else + goto out_v4_not_compiled; +#endif /* CONFIG_NFS_V4 */ + } else + nfs_set_mount_transport_protocol(args); + + nfs_set_port(sap, &args->nfs_server.port, port); + + return nfs_parse_devname(dev_name, + &args->nfs_server.hostname, + max_namelen, + &args->nfs_server.export_path, + max_pathlen); + +#if !IS_ENABLED(CONFIG_NFS_V4) +out_v4_not_compiled: + dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + return -EPROTONOSUPPORT; +#else +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; +#endif /* !CONFIG_NFS_V4 */ + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; +} + +#define NFS_MOUNT_CMP_FLAGMASK ~(NFS_MOUNT_INTR \ + | NFS_MOUNT_SECURE \ + | NFS_MOUNT_TCP \ + | NFS_MOUNT_VER3 \ + | NFS_MOUNT_KERBEROS \ + | NFS_MOUNT_NONLM \ + | NFS_MOUNT_BROKEN_SUID \ + | NFS_MOUNT_STRICTLOCK \ + | NFS_MOUNT_UNSHARED \ + | NFS_MOUNT_NORESVPORT \ + | NFS_MOUNT_LEGACY_INTERFACE) + static int nfs_compare_remount_data(struct nfs_server *nfss, struct nfs_parsed_mount_data *data) { - if (data->flags != nfss->flags || + if ((data->flags ^ nfss->flags) & NFS_MOUNT_CMP_FLAGMASK || data->rsize != nfss->rsize || data->wsize != nfss->wsize || + data->version != nfss->nfs_client->rpc_ops->version || + data->minorversion != nfss->nfs_client->cl_minorversion || data->retrans != nfss->client->cl_timeout->to_retries || - data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || + data->selected_flavor != nfss->client->cl_auth->au_flavor || data->acregmin != nfss->acregmin / HZ || data->acregmax != nfss->acregmax / HZ || data->acdirmin != nfss->acdirmin / HZ || @@ -2028,7 +2217,7 @@ nfs_compare_remount_data(struct nfs_server *nfss, return 0; } -static int +int nfs_remount(struct super_block *sb, int *flags, char *raw_data) { int error; @@ -2038,6 +2227,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) struct nfs4_mount_data *options4 = (struct nfs4_mount_data *)raw_data; u32 nfsvers = nfss->nfs_client->rpc_ops->version; + sync_filesystem(sb); + /* * Userspace mount programs that send binary options generally send * them populated with default values. We have no way to know which @@ -2058,7 +2249,8 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) data->rsize = nfss->rsize; data->wsize = nfss->wsize; data->retrans = nfss->client->cl_timeout->to_retries; - data->auth_flavors[0] = nfss->client->cl_auth->au_flavor; + data->selected_flavor = nfss->client->cl_auth->au_flavor; + data->auth_info = nfss->auth_info; data->acregmin = nfss->acregmin / HZ; data->acregmax = nfss->acregmax / HZ; data->acdirmin = nfss->acdirmin / HZ; @@ -2066,25 +2258,38 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) data->timeo = 10U * nfss->client->cl_timeout->to_initval / HZ; data->nfs_server.port = nfss->port; data->nfs_server.addrlen = nfss->nfs_client->cl_addrlen; + data->version = nfsvers; + data->minorversion = nfss->nfs_client->cl_minorversion; + data->net = current->nsproxy->net_ns; memcpy(&data->nfs_server.address, &nfss->nfs_client->cl_addr, data->nfs_server.addrlen); /* overwrite those values with any that were specified */ - error = nfs_parse_mount_options((char *)options, data); - if (error < 0) + error = -EINVAL; + if (!nfs_parse_mount_options((char *)options, data)) goto out; + /* + * noac is a special case. It implies -o sync, but that's not + * necessarily reflected in the mtab options. do_remount_sb + * will clear MS_SYNCHRONOUS if -o sync wasn't specified in the + * remount options, so we have to explicitly reset it. + */ + if (data->flags & NFS_MOUNT_NOAC) + *flags |= MS_SYNCHRONOUS; + /* compare new mount options with old ones */ error = nfs_compare_remount_data(nfss, data); out: kfree(data); return error; } +EXPORT_SYMBOL_GPL(nfs_remount); /* * Initialise the common bits of the superblock */ -static inline void nfs_initialise_sb(struct super_block *sb) +inline void nfs_initialise_sb(struct super_block *sb) { struct nfs_server *server = NFS_SB(sb); @@ -2092,15 +2297,12 @@ static inline void nfs_initialise_sb(struct super_block *sb) /* We probably want something more informative here */ snprintf(sb->s_id, sizeof(sb->s_id), - "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); + "%u:%u", MAJOR(sb->s_dev), MINOR(sb->s_dev)); if (sb->s_blocksize == 0) sb->s_blocksize = nfs_block_bits(server->wsize, &sb->s_blocksize_bits); - if (server->flags & NFS_MOUNT_NOAC) - sb->s_flags |= MS_SYNCHRONOUS; - sb->s_bdi = &server->backing_dev_info; nfs_super_set_maxbytes(sb, server->maxfilesize); @@ -2109,17 +2311,19 @@ static inline void nfs_initialise_sb(struct super_block *sb) /* * Finish setting up an NFS2/3 superblock */ -static void nfs_fill_super(struct super_block *sb, - struct nfs_parsed_mount_data *data) +void nfs_fill_super(struct super_block *sb, struct nfs_mount_info *mount_info) { + struct nfs_parsed_mount_data *data = mount_info->parsed; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = 0; sb->s_blocksize = 0; - if (data->bsize) + sb->s_xattr = server->nfs_client->cl_nfs_mod->xattr; + sb->s_op = server->nfs_client->cl_nfs_mod->sops; + if (data && data->bsize) sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); - if (server->nfs_client->rpc_ops->version == 3) { + if (server->nfs_client->rpc_ops->version != 2) { /* The VFS shouldn't apply the umask to mode bits. We will do * so ourselves when necessary. */ @@ -2127,31 +2331,32 @@ static void nfs_fill_super(struct super_block *sb, sb->s_time_gran = 1; } - sb->s_op = &nfs_sops; nfs_initialise_sb(sb); } +EXPORT_SYMBOL_GPL(nfs_fill_super); /* - * Finish setting up a cloned NFS2/3 superblock + * Finish setting up a cloned NFS2/3/4 superblock */ -static void nfs_clone_super(struct super_block *sb, - const struct super_block *old_sb) +void nfs_clone_super(struct super_block *sb, struct nfs_mount_info *mount_info) { + const struct super_block *old_sb = mount_info->cloned->sb; struct nfs_server *server = NFS_SB(sb); sb->s_blocksize_bits = old_sb->s_blocksize_bits; sb->s_blocksize = old_sb->s_blocksize; sb->s_maxbytes = old_sb->s_maxbytes; + sb->s_xattr = old_sb->s_xattr; + sb->s_op = old_sb->s_op; + sb->s_time_gran = 1; - if (server->nfs_client->rpc_ops->version == 3) { + if (server->nfs_client->rpc_ops->version != 2) { /* The VFS shouldn't apply the umask to mode bits. We will do * so ourselves when necessary. */ sb->s_flags |= MS_POSIXACL; - sb->s_time_gran = 1; } - sb->s_op = old_sb->s_op; nfs_initialise_sb(sb); } @@ -2165,7 +2370,7 @@ static int nfs_compare_mount_options(const struct super_block *s, const struct n goto Ebusy; if (a->nfs_client != b->nfs_client) goto Ebusy; - if (a->flags != b->flags) + if ((a->flags ^ b->flags) & NFS_MOUNT_CMP_FLAGMASK) goto Ebusy; if (a->wsize != b->wsize) goto Ebusy; @@ -2179,7 +2384,8 @@ static int nfs_compare_mount_options(const struct super_block *s, const struct n goto Ebusy; if (a->acdirmax != b->acdirmax) goto Ebusy; - if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) + if (b->auth_info.flavor_len > 0 && + clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor) goto Ebusy; return 1; Ebusy: @@ -2199,6 +2405,7 @@ static int nfs_set_super(struct super_block *s, void *data) s->s_flags = sb_mntdata->mntflags; s->s_fs_info = server; + s->s_d_op = server->nfs_client->rpc_ops->dentry_ops; ret = set_anon_super(s, server); if (ret == 0) server->s_dev = s->s_dev; @@ -2258,61 +2465,111 @@ static int nfs_compare_super(struct super_block *sb, void *data) return nfs_compare_mount_options(sb, server, mntflags); } +#ifdef CONFIG_NFS_FSCACHE +static void nfs_get_cache_cookie(struct super_block *sb, + struct nfs_parsed_mount_data *parsed, + struct nfs_clone_mount *cloned) +{ + struct nfs_server *nfss = NFS_SB(sb); + char *uniq = NULL; + int ulen = 0; + + nfss->fscache_key = NULL; + nfss->fscache = NULL; + + if (parsed) { + if (!(parsed->options & NFS_OPTION_FSCACHE)) + return; + if (parsed->fscache_uniq) { + uniq = parsed->fscache_uniq; + ulen = strlen(parsed->fscache_uniq); + } + } else if (cloned) { + struct nfs_server *mnt_s = NFS_SB(cloned->sb); + if (!(mnt_s->options & NFS_OPTION_FSCACHE)) + return; + if (mnt_s->fscache_key) { + uniq = mnt_s->fscache_key->key.uniquifier; + ulen = mnt_s->fscache_key->key.uniq_len; + }; + } else + return; + + nfs_fscache_get_super_cookie(sb, uniq, ulen); +} +#else +static void nfs_get_cache_cookie(struct super_block *sb, + struct nfs_parsed_mount_data *parsed, + struct nfs_clone_mount *cloned) +{ +} +#endif + static int nfs_bdi_register(struct nfs_server *server) { return bdi_register_dev(&server->backing_dev_info, server->s_dev); } -static int nfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) +int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, + struct nfs_mount_info *mount_info) +{ + int error; + unsigned long kflags = 0, kflags_out = 0; + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) + kflags |= SECURITY_LSM_NATIVE_LABELS; + + error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts, + kflags, &kflags_out); + if (error) + goto err; + + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && + !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) + NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; +err: + return error; +} +EXPORT_SYMBOL_GPL(nfs_set_sb_security); + +int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot, + struct nfs_mount_info *mount_info) +{ + /* clone any lsm security options from the parent to the new sb */ + if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) + return -ESTALE; + return security_sb_clone_mnt_opts(mount_info->cloned->sb, s); +} +EXPORT_SYMBOL_GPL(nfs_clone_sb_security); + +struct dentry *nfs_fs_mount_common(struct nfs_server *server, + int flags, const char *dev_name, + struct nfs_mount_info *mount_info, + struct nfs_subversion *nfs_mod) { - struct nfs_server *server = NULL; struct super_block *s; - struct nfs_parsed_mount_data *data; - struct nfs_fh *mntfh; - struct dentry *mntroot; + struct dentry *mntroot = ERR_PTR(-ENOMEM); int (*compare_super)(struct super_block *, void *) = nfs_compare_super; struct nfs_sb_mountdata sb_mntdata = { .mntflags = flags, + .server = server, }; - int error = -ENOMEM; - - data = nfs_alloc_parsed_mount_data(3); - mntfh = nfs_alloc_fhandle(); - if (data == NULL || mntfh == NULL) - goto out_free_fh; - - security_init_mnt_opts(&data->lsm_opts); - - /* Validate the mount data */ - error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); - if (error < 0) - goto out; - -#ifdef CONFIG_NFS_V4 - if (data->version == 4) { - error = nfs4_try_mount(flags, dev_name, data, mnt); - kfree(data->client_address); - kfree(data->nfs_server.export_path); - goto out; - } -#endif /* CONFIG_NFS_V4 */ - - /* Get a volume representation */ - server = nfs_create_server(data, mntfh); - if (IS_ERR(server)) { - error = PTR_ERR(server); - goto out; - } - sb_mntdata.server = server; + int error; if (server->flags & NFS_MOUNT_UNSHARED) compare_super = NULL; + /* -o noac implies -o sync */ + if (server->flags & NFS_MOUNT_NOAC) + sb_mntdata.mntflags |= MS_SYNCHRONOUS; + + if (mount_info->cloned != NULL && mount_info->cloned->sb != NULL) + if (mount_info->cloned->sb->s_flags & MS_SYNCHRONOUS) + sb_mntdata.mntflags |= MS_SYNCHRONOUS; + /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata); + s = sget(nfs_mod->nfs_fs, compare_super, nfs_set_super, flags, &sb_mntdata); if (IS_ERR(s)) { - error = PTR_ERR(s); + mntroot = ERR_CAST(s); goto out_err_nosb; } @@ -2321,41 +2578,31 @@ static int nfs_get_sb(struct file_system_type *fs_type, server = NULL; } else { error = nfs_bdi_register(server); - if (error) + if (error) { + mntroot = ERR_PTR(error); goto error_splat_bdi; + } + server->super = s; } if (!s->s_root) { /* initial superblock/root creation */ - nfs_fill_super(s, data); - nfs_fscache_get_super_cookie( - s, data ? data->fscache_uniq : NULL, NULL); + mount_info->fill_super(s, mount_info); + nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned); } - mntroot = nfs_get_root(s, mntfh); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); + mntroot = nfs_get_root(s, mount_info->mntfh, dev_name); + if (IS_ERR(mntroot)) goto error_splat_super; - } - error = security_sb_set_mnt_opts(s, &data->lsm_opts); + error = mount_info->set_security(s, mntroot, mount_info); if (error) goto error_splat_root; s->s_flags |= MS_ACTIVE; - mnt->mnt_sb = s; - mnt->mnt_root = mntroot; - error = 0; out: - kfree(data->nfs_server.hostname); - kfree(data->mount_server.hostname); - kfree(data->fscache_uniq); - security_free_mnt_opts(&data->lsm_opts); -out_free_fh: - nfs_free_fhandle(mntfh); - kfree(data); - return error; + return mntroot; out_err_nosb: nfs_free_server(server); @@ -2363,6 +2610,7 @@ out_err_nosb: error_splat_root: dput(mntroot); + mntroot = ERR_PTR(error); error_splat_super: if (server && !s->s_root) bdi_unregister(&server->backing_dev_info); @@ -2370,22 +2618,65 @@ error_splat_bdi: deactivate_locked_super(s); goto out; } +EXPORT_SYMBOL_GPL(nfs_fs_mount_common); + +struct dentry *nfs_fs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) +{ + struct nfs_mount_info mount_info = { + .fill_super = nfs_fill_super, + .set_security = nfs_set_sb_security, + }; + struct dentry *mntroot = ERR_PTR(-ENOMEM); + struct nfs_subversion *nfs_mod; + int error; + + mount_info.parsed = nfs_alloc_parsed_mount_data(); + mount_info.mntfh = nfs_alloc_fhandle(); + if (mount_info.parsed == NULL || mount_info.mntfh == NULL) + goto out; + + /* Validate the mount data */ + error = nfs_validate_mount_data(fs_type, raw_data, mount_info.parsed, mount_info.mntfh, dev_name); + if (error == NFS_TEXT_DATA) + error = nfs_validate_text_mount_data(raw_data, mount_info.parsed, dev_name); + if (error < 0) { + mntroot = ERR_PTR(error); + goto out; + } + + nfs_mod = get_nfs_version(mount_info.parsed->version); + if (IS_ERR(nfs_mod)) { + mntroot = ERR_CAST(nfs_mod); + goto out; + } + + mntroot = nfs_mod->rpc_ops->try_mount(flags, dev_name, &mount_info, nfs_mod); + + put_nfs_version(nfs_mod); +out: + nfs_free_parsed_mount_data(mount_info.parsed); + nfs_free_fhandle(mount_info.mntfh); + return mntroot; +} +EXPORT_SYMBOL_GPL(nfs_fs_mount); /* * Ensure that we unregister the bdi before kill_anon_super * releases the device name */ -static void nfs_put_super(struct super_block *s) +void nfs_put_super(struct super_block *s) { struct nfs_server *server = NFS_SB(s); bdi_unregister(&server->backing_dev_info); } +EXPORT_SYMBOL_GPL(nfs_put_super); /* * Destroy an NFS2/3 superblock */ -static void nfs_kill_super(struct super_block *s) +void nfs_kill_super(struct super_block *s) { struct nfs_server *server = NFS_SB(s); @@ -2393,118 +2684,44 @@ static void nfs_kill_super(struct super_block *s) nfs_fscache_release_super_cookie(s); nfs_free_server(server); } +EXPORT_SYMBOL_GPL(nfs_kill_super); /* - * Clone an NFS2/3 server record on xdev traversal (FSID-change) + * Clone an NFS2/3/4 server record on xdev traversal (FSID-change) */ static struct dentry * nfs_xdev_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; - struct super_block *s; - struct nfs_server *server; - struct dentry *mntroot; - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, + struct nfs_mount_info mount_info = { + .fill_super = nfs_clone_super, + .set_security = nfs_clone_sb_security, + .cloned = data, }; - int error; + struct nfs_server *server; + struct dentry *mntroot = ERR_PTR(-ENOMEM); + struct nfs_subversion *nfs_mod = NFS_SB(data->sb)->nfs_client->cl_nfs_mod; dprintk("--> nfs_xdev_mount()\n"); - /* create a new volume representation */ - server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); - if (IS_ERR(server)) { - error = PTR_ERR(server); - goto out_err_noserver; - } - sb_mntdata.server = server; + mount_info.mntfh = mount_info.cloned->fh; - if (server->flags & NFS_MOUNT_UNSHARED) - compare_super = NULL; - - /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata); - if (IS_ERR(s)) { - error = PTR_ERR(s); - goto out_err_nosb; - } - - if (s->s_fs_info != server) { - nfs_free_server(server); - server = NULL; - } else { - error = nfs_bdi_register(server); - if (error) - goto error_splat_bdi; - } - - if (!s->s_root) { - /* initial superblock/root creation */ - nfs_clone_super(s, data->sb); - nfs_fscache_get_super_cookie(s, NULL, data); - } - - mntroot = nfs_get_root(s, data->fh); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); - goto error_splat_super; - } - if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { - dput(mntroot); - error = -ESTALE; - goto error_splat_super; - } - - s->s_flags |= MS_ACTIVE; + /* create a new volume representation */ + server = nfs_mod->rpc_ops->clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor); - /* clone any lsm security options from the parent to the new sb */ - security_sb_clone_mnt_opts(data->sb, s); + if (IS_ERR(server)) + mntroot = ERR_CAST(server); + else + mntroot = nfs_fs_mount_common(server, flags, + dev_name, &mount_info, nfs_mod); - dprintk("<-- nfs_xdev_mount() = 0\n"); + dprintk("<-- nfs_xdev_mount() = %ld\n", + IS_ERR(mntroot) ? PTR_ERR(mntroot) : 0L); return mntroot; - -out_err_nosb: - nfs_free_server(server); -out_err_noserver: - dprintk("<-- nfs_xdev_mount() = %d [error]\n", error); - return ERR_PTR(error); - -error_splat_super: - if (server && !s->s_root) - bdi_unregister(&server->backing_dev_info); -error_splat_bdi: - deactivate_locked_super(s); - dprintk("<-- nfs_xdev_mount() = %d [splat]\n", error); - return ERR_PTR(error); -} - -#ifdef CONFIG_NFS_V4 - -/* - * Finish setting up a cloned NFS4 superblock - */ -static void nfs4_clone_super(struct super_block *sb, - const struct super_block *old_sb) -{ - sb->s_blocksize_bits = old_sb->s_blocksize_bits; - sb->s_blocksize = old_sb->s_blocksize; - sb->s_maxbytes = old_sb->s_maxbytes; - sb->s_time_gran = 1; - sb->s_op = old_sb->s_op; - nfs_initialise_sb(sb); } -/* - * Set up an NFS4 superblock - */ -static void nfs4_fill_super(struct super_block *sb) -{ - sb->s_time_gran = 1; - sb->s_op = &nfs4_sops; - nfs_initialise_sb(sb); -} +#if IS_ENABLED(CONFIG_NFS_V4) static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) { @@ -2512,43 +2729,6 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); } -static int nfs4_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - - nfs_set_port(sap, &args->nfs_server.port, NFS_PORT); - - nfs_validate_transport_protocol(args); - - nfs4_validate_mount_flags(args); - - if (args->version != 4) { - dfprintk(MOUNT, - "NFS4: Illegal mount version\n"); - return -EINVAL; - } - - if (args->auth_flavor_len > 1) { - dfprintk(MOUNT, - "NFS4: Too many RPC auth flavours specified\n"); - return -EINVAL; - } - - if (args->client_address == NULL) { - dfprintk(MOUNT, - "NFS4: mount program didn't pass callback address\n"); - return -EINVAL; - } - - return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - NFS4_MAXNAMLEN, - &args->nfs_server.export_path, - NFS4_MAXPATHLEN); -} - /* * Validate NFSv4 mount options */ @@ -2563,6 +2743,8 @@ static int nfs4_validate_mount_data(void *options, if (data == NULL) goto out_no_data; + args->version = 4; + switch (data->version) { case 1: if (data->host_addrlen > sizeof(args->nfs_server.address)) @@ -2574,15 +2756,19 @@ static int nfs4_validate_mount_data(void *options, return -EFAULT; if (!nfs_verify_server_address(sap)) goto out_no_address; + args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port); if (data->auth_flavourlen) { + rpc_authflavor_t pseudoflavor; if (data->auth_flavourlen > 1) goto out_inval_auth; - if (copy_from_user(&args->auth_flavors[0], + if (copy_from_user(&pseudoflavor, data->auth_flavours, - sizeof(args->auth_flavors[0]))) + sizeof(pseudoflavor))) return -EFAULT; - } + args->selected_flavor = pseudoflavor; + } else + args->selected_flavor = RPC_AUTH_UNIX; c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); if (IS_ERR(c)) @@ -2616,16 +2802,12 @@ static int nfs4_validate_mount_data(void *options, args->acdirmax = data->acdirmax; args->nfs_server.protocol = data->proto; nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; break; default: - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - return -EINVAL; - - return nfs4_validate_text_mount_data(options, args, dev_name); + return NFS_TEXT_DATA; } return 0; @@ -2642,535 +2824,76 @@ out_inval_auth: out_no_address: dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); return -EINVAL; + +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; } /* - * Get the superblock for the NFS4 root partition + * NFS v4 module parameters need to stay in the + * NFS client for backwards compatibility */ -static struct dentry * -nfs4_remote_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - struct nfs_parsed_mount_data *data = raw_data; - struct super_block *s; - struct nfs_server *server; - struct nfs_fh *mntfh; - struct dentry *mntroot; - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, - }; - int error = -ENOMEM; - - mntfh = nfs_alloc_fhandle(); - if (data == NULL || mntfh == NULL) - goto out_free_fh; - - security_init_mnt_opts(&data->lsm_opts); - - /* Get a volume representation */ - server = nfs4_create_server(data, mntfh); - if (IS_ERR(server)) { - error = PTR_ERR(server); - goto out; - } - sb_mntdata.server = server; - - if (server->flags & NFS4_MOUNT_UNSHARED) - compare_super = NULL; - - /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); - if (IS_ERR(s)) { - error = PTR_ERR(s); - goto out_free; - } - - if (s->s_fs_info != server) { - nfs_free_server(server); - server = NULL; - } else { - error = nfs_bdi_register(server); - if (error) - goto error_splat_bdi; - } - - if (!s->s_root) { - /* initial superblock/root creation */ - nfs4_fill_super(s); - nfs_fscache_get_super_cookie( - s, data ? data->fscache_uniq : NULL, NULL); - } - - mntroot = nfs4_get_root(s, mntfh); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); - goto error_splat_super; - } - - error = security_sb_set_mnt_opts(s, &data->lsm_opts); - if (error) - goto error_splat_root; - - s->s_flags |= MS_ACTIVE; - - security_free_mnt_opts(&data->lsm_opts); - nfs_free_fhandle(mntfh); - return mntroot; - -out: - security_free_mnt_opts(&data->lsm_opts); -out_free_fh: - nfs_free_fhandle(mntfh); - return ERR_PTR(error); - -out_free: - nfs_free_server(server); - goto out; - -error_splat_root: - dput(mntroot); -error_splat_super: - if (server && !s->s_root) - bdi_unregister(&server->backing_dev_info); -error_splat_bdi: - deactivate_locked_super(s); - goto out; -} - -static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - int flags, void *data, const char *hostname) -{ - struct vfsmount *root_mnt; - char *root_devname; - size_t len; - - len = strlen(hostname) + 3; - root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) - return ERR_PTR(-ENOMEM); - snprintf(root_devname, len, "%s:/", hostname); - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); - kfree(root_devname); - return root_mnt; -} - -static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt) -{ - char *page = (char *) __get_free_page(GFP_KERNEL); - char *devname, *tmp; - - if (page == NULL) - return; - devname = nfs_path(path->mnt->mnt_devname, - path->mnt->mnt_root, path->dentry, - page, PAGE_SIZE); - if (IS_ERR(devname)) - goto out_freepage; - tmp = kstrdup(devname, GFP_KERNEL); - if (tmp == NULL) - goto out_freepage; - kfree(mnt->mnt_devname); - mnt->mnt_devname = tmp; -out_freepage: - free_page((unsigned long)page); -} - -struct nfs_referral_count { - struct list_head list; - const struct task_struct *task; - unsigned int referral_count; -}; - -static LIST_HEAD(nfs_referral_count_list); -static DEFINE_SPINLOCK(nfs_referral_count_list_lock); - -static struct nfs_referral_count *nfs_find_referral_count(void) -{ - struct nfs_referral_count *p; - - list_for_each_entry(p, &nfs_referral_count_list, list) { - if (p->task == current) - return p; - } - return NULL; -} - -#define NFS_MAX_NESTED_REFERRALS 2 - -static int nfs_referral_loop_protect(void) +unsigned int nfs_callback_set_tcpport; +unsigned short nfs_callback_tcpport; +/* Default cache timeout is 10 minutes */ +unsigned int nfs_idmap_cache_timeout = 600; +/* Turn off NFSv4 uid/gid mapping when using AUTH_SYS */ +bool nfs4_disable_idmapping = true; +unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; +unsigned short send_implementation_id = 1; +char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; +bool recover_lost_locks = false; + +EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); +EXPORT_SYMBOL_GPL(nfs_callback_tcpport); +EXPORT_SYMBOL_GPL(nfs_idmap_cache_timeout); +EXPORT_SYMBOL_GPL(nfs4_disable_idmapping); +EXPORT_SYMBOL_GPL(max_session_slots); +EXPORT_SYMBOL_GPL(send_implementation_id); +EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); +EXPORT_SYMBOL_GPL(recover_lost_locks); + +#define NFS_CALLBACK_MAXPORTNR (65535U) + +static int param_set_portnr(const char *val, const struct kernel_param *kp) { - struct nfs_referral_count *p, *new; - int ret = -ENOMEM; - - new = kmalloc(sizeof(*new), GFP_KERNEL); - if (!new) - goto out; - new->task = current; - new->referral_count = 1; - - ret = 0; - spin_lock(&nfs_referral_count_list_lock); - p = nfs_find_referral_count(); - if (p != NULL) { - if (p->referral_count >= NFS_MAX_NESTED_REFERRALS) - ret = -ELOOP; - else - p->referral_count++; - } else { - list_add(&new->list, &nfs_referral_count_list); - new = NULL; - } - spin_unlock(&nfs_referral_count_list_lock); - kfree(new); -out: - return ret; -} - -static void nfs_referral_loop_unprotect(void) -{ - struct nfs_referral_count *p; - - spin_lock(&nfs_referral_count_list_lock); - p = nfs_find_referral_count(); - p->referral_count--; - if (p->referral_count == 0) - list_del(&p->list); - else - p = NULL; - spin_unlock(&nfs_referral_count_list_lock); - kfree(p); -} - -static int nfs_follow_remote_path(struct vfsmount *root_mnt, - const char *export_path, struct vfsmount *mnt_target) -{ - struct nameidata *nd = NULL; - struct mnt_namespace *ns_private; - struct super_block *s; + unsigned long num; int ret; - nd = kmalloc(sizeof(*nd), GFP_KERNEL); - if (nd == NULL) - return -ENOMEM; - - ns_private = create_mnt_ns(root_mnt); - ret = PTR_ERR(ns_private); - if (IS_ERR(ns_private)) - goto out_mntput; - - ret = nfs_referral_loop_protect(); - if (ret != 0) - goto out_put_mnt_ns; - - ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, - export_path, LOOKUP_FOLLOW, nd); - - nfs_referral_loop_unprotect(); - put_mnt_ns(ns_private); - - if (ret != 0) - goto out_err; - - s = nd->path.mnt->mnt_sb; - atomic_inc(&s->s_active); - mnt_target->mnt_sb = s; - mnt_target->mnt_root = dget(nd->path.dentry); - - /* Correct the device pathname */ - nfs_fix_devname(&nd->path, mnt_target); - - path_put(&nd->path); - kfree(nd); - down_write(&s->s_umount); + if (!val) + return -EINVAL; + ret = kstrtoul(val, 0, &num); + if (ret == -EINVAL || num > NFS_CALLBACK_MAXPORTNR) + return -EINVAL; + *((unsigned int *)kp->arg) = num; return 0; -out_put_mnt_ns: - put_mnt_ns(ns_private); -out_mntput: - mntput(root_mnt); -out_err: - kfree(nd); - return ret; -} - -static int nfs4_try_mount(int flags, const char *dev_name, - struct nfs_parsed_mount_data *data, - struct vfsmount *mnt) -{ - char *export_path; - struct vfsmount *root_mnt; - int error; - - dfprintk(MOUNT, "--> nfs4_try_mount()\n"); - - export_path = data->nfs_server.export_path; - data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, data, - data->nfs_server.hostname); - data->nfs_server.export_path = export_path; - - error = PTR_ERR(root_mnt); - if (IS_ERR(root_mnt)) - goto out; - - error = nfs_follow_remote_path(root_mnt, export_path, mnt); - -out: - dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error, - error != 0 ? " [error]" : ""); - return error; } +static struct kernel_param_ops param_ops_portnr = { + .set = param_set_portnr, + .get = param_get_uint, +}; +#define param_check_portnr(name, p) __param_check(name, p, unsigned int); + +module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644); +module_param(nfs_idmap_cache_timeout, int, 0644); +module_param(nfs4_disable_idmapping, bool, 0644); +module_param_string(nfs4_unique_id, nfs4_client_id_uniquifier, + NFS4_CLIENT_ID_UNIQ_LEN, 0600); +MODULE_PARM_DESC(nfs4_disable_idmapping, + "Turn off NFSv4 idmapping when using 'sec=sys'"); +module_param(max_session_slots, ushort, 0644); +MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " + "requests the client will negotiate"); +module_param(send_implementation_id, ushort, 0644); +MODULE_PARM_DESC(send_implementation_id, + "Send implementation ID with NFSv4.1 exchange_id"); +MODULE_PARM_DESC(nfs4_unique_id, "nfs_client_id4 uniquifier string"); + +module_param(recover_lost_locks, bool, 0644); +MODULE_PARM_DESC(recover_lost_locks, + "If the server reports that a lock might be lost, " + "try to recover it risking data corruption."); -/* - * Get the superblock for an NFS4 mountpoint - */ -static int nfs4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) -{ - struct nfs_parsed_mount_data *data; - int error = -ENOMEM; - - data = nfs_alloc_parsed_mount_data(4); - if (data == NULL) - goto out_free_data; - - /* Validate the mount data */ - error = nfs4_validate_mount_data(raw_data, data, dev_name); - if (error < 0) - goto out; - - error = nfs4_try_mount(flags, dev_name, data, mnt); - -out: - kfree(data->client_address); - kfree(data->nfs_server.export_path); - kfree(data->nfs_server.hostname); - kfree(data->fscache_uniq); -out_free_data: - kfree(data); - dprintk("<-- nfs4_get_sb() = %d%s\n", error, - error != 0 ? " [error]" : ""); - return error; -} - -static void nfs4_kill_super(struct super_block *sb) -{ - struct nfs_server *server = NFS_SB(sb); - - dprintk("--> %s\n", __func__); - nfs_super_return_all_delegations(sb); - kill_anon_super(sb); - nfs_fscache_release_super_cookie(sb); - nfs_free_server(server); - dprintk("<-- %s\n", __func__); -} - -/* - * Clone an NFS4 server record on xdev traversal (FSID-change) - */ -static struct dentry * -nfs4_xdev_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - struct nfs_clone_mount *data = raw_data; - struct super_block *s; - struct nfs_server *server; - struct dentry *mntroot; - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, - }; - int error; - - dprintk("--> nfs4_xdev_mount()\n"); - - /* create a new volume representation */ - server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); - if (IS_ERR(server)) { - error = PTR_ERR(server); - goto out_err_noserver; - } - sb_mntdata.server = server; - - if (server->flags & NFS4_MOUNT_UNSHARED) - compare_super = NULL; - - /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); - if (IS_ERR(s)) { - error = PTR_ERR(s); - goto out_err_nosb; - } - - if (s->s_fs_info != server) { - nfs_free_server(server); - server = NULL; - } else { - error = nfs_bdi_register(server); - if (error) - goto error_splat_bdi; - } - - if (!s->s_root) { - /* initial superblock/root creation */ - nfs4_clone_super(s, data->sb); - nfs_fscache_get_super_cookie(s, NULL, data); - } - - mntroot = nfs4_get_root(s, data->fh); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); - goto error_splat_super; - } - if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { - dput(mntroot); - error = -ESTALE; - goto error_splat_super; - } - - s->s_flags |= MS_ACTIVE; - - security_sb_clone_mnt_opts(data->sb, s); - - dprintk("<-- nfs4_xdev_mount() = 0\n"); - return mntroot; - -out_err_nosb: - nfs_free_server(server); -out_err_noserver: - dprintk("<-- nfs4_xdev_mount() = %d [error]\n", error); - return ERR_PTR(error); - -error_splat_super: - if (server && !s->s_root) - bdi_unregister(&server->backing_dev_info); -error_splat_bdi: - deactivate_locked_super(s); - dprintk("<-- nfs4_xdev_mount() = %d [splat]\n", error); - return ERR_PTR(error); -} - -static struct dentry * -nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data) -{ - struct nfs_clone_mount *data = raw_data; - struct super_block *s; - struct nfs_server *server; - struct dentry *mntroot; - struct nfs_fh *mntfh; - int (*compare_super)(struct super_block *, void *) = nfs_compare_super; - struct nfs_sb_mountdata sb_mntdata = { - .mntflags = flags, - }; - int error = -ENOMEM; - - dprintk("--> nfs4_referral_get_sb()\n"); - - mntfh = nfs_alloc_fhandle(); - if (mntfh == NULL) - goto out_err_nofh; - - /* create a new volume representation */ - server = nfs4_create_referral_server(data, mntfh); - if (IS_ERR(server)) { - error = PTR_ERR(server); - goto out_err_noserver; - } - sb_mntdata.server = server; - - if (server->flags & NFS4_MOUNT_UNSHARED) - compare_super = NULL; - - /* Get a superblock - note that we may end up sharing one that already exists */ - s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata); - if (IS_ERR(s)) { - error = PTR_ERR(s); - goto out_err_nosb; - } - - if (s->s_fs_info != server) { - nfs_free_server(server); - server = NULL; - } else { - error = nfs_bdi_register(server); - if (error) - goto error_splat_bdi; - } - - if (!s->s_root) { - /* initial superblock/root creation */ - nfs4_fill_super(s); - nfs_fscache_get_super_cookie(s, NULL, data); - } - - mntroot = nfs4_get_root(s, mntfh); - if (IS_ERR(mntroot)) { - error = PTR_ERR(mntroot); - goto error_splat_super; - } - if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) { - dput(mntroot); - error = -ESTALE; - goto error_splat_super; - } - - s->s_flags |= MS_ACTIVE; - - security_sb_clone_mnt_opts(data->sb, s); - - nfs_free_fhandle(mntfh); - dprintk("<-- nfs4_referral_get_sb() = 0\n"); - return mntroot; - -out_err_nosb: - nfs_free_server(server); -out_err_noserver: - nfs_free_fhandle(mntfh); -out_err_nofh: - dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); - return ERR_PTR(error); - -error_splat_super: - if (server && !s->s_root) - bdi_unregister(&server->backing_dev_info); -error_splat_bdi: - deactivate_locked_super(s); - nfs_free_fhandle(mntfh); - dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); - return ERR_PTR(error); -} - -/* - * Create an NFS4 server record on referral traversal - */ -static int nfs4_referral_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, - struct vfsmount *mnt) -{ - struct nfs_clone_mount *data = raw_data; - char *export_path; - struct vfsmount *root_mnt; - int error; - - dprintk("--> nfs4_referral_get_sb()\n"); - - export_path = data->mnt_path; - data->mnt_path = "/"; - - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, - flags, data, data->hostname); - data->mnt_path = export_path; - - error = PTR_ERR(root_mnt); - if (IS_ERR(root_mnt)) - goto out; - - error = nfs_follow_remote_path(root_mnt, export_path, mnt); -out: - dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error, - error != 0 ? " [error]" : ""); - return error; -} #endif /* CONFIG_NFS_V4 */ diff --git a/fs/nfs/sysctl.c b/fs/nfs/sysctl.c index 978aaeb8a09..bb6ed810fa6 100644 --- a/fs/nfs/sysctl.c +++ b/fs/nfs/sysctl.c @@ -9,39 +9,11 @@ #include <linux/fs.h> #include <linux/sysctl.h> #include <linux/module.h> -#include <linux/nfs4.h> -#include <linux/nfs_idmap.h> #include <linux/nfs_fs.h> -#include "callback.h" - -#ifdef CONFIG_NFS_V4 -static const int nfs_set_port_min = 0; -static const int nfs_set_port_max = 65535; -#endif static struct ctl_table_header *nfs_callback_sysctl_table; -static ctl_table nfs_cb_sysctls[] = { -#ifdef CONFIG_NFS_V4 - { - .procname = "nfs_callback_tcpport", - .data = &nfs_callback_set_tcpport, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = (int *)&nfs_set_port_min, - .extra2 = (int *)&nfs_set_port_max, - }, -#ifndef CONFIG_NFS_USE_NEW_IDMAPPER - { - .procname = "idmap_cache_timeout", - .data = &nfs_idmap_cache_timeout, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec_jiffies, - }, -#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */ -#endif +static struct ctl_table nfs_cb_sysctls[] = { { .procname = "nfs_mountpoint_timeout", .data = &nfs_mountpoint_expiry_timeout, @@ -59,7 +31,7 @@ static ctl_table nfs_cb_sysctls[] = { { } }; -static ctl_table nfs_cb_sysctl_dir[] = { +static struct ctl_table nfs_cb_sysctl_dir[] = { { .procname = "nfs", .mode = 0555, @@ -68,7 +40,7 @@ static ctl_table nfs_cb_sysctl_dir[] = { { } }; -static ctl_table nfs_cb_sysctl_root[] = { +static struct ctl_table nfs_cb_sysctl_root[] = { { .procname = "fs", .mode = 0555, diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c index 7bdec853140..de54129336c 100644 --- a/fs/nfs/unlink.c +++ b/fs/nfs/unlink.c @@ -14,20 +14,14 @@ #include <linux/sched.h> #include <linux/wait.h> #include <linux/namei.h> +#include <linux/fsnotify.h> #include "internal.h" #include "nfs4_fs.h" #include "iostat.h" #include "delegation.h" -struct nfs_unlinkdata { - struct hlist_node list; - struct nfs_removeargs args; - struct nfs_removeres res; - struct inode *dir; - struct rpc_cred *cred; - struct nfs_fattr dir_attr; -}; +#include "nfstrace.h" /** * nfs_free_unlinkdata - release data from a sillydelete operation. @@ -86,8 +80,9 @@ static void nfs_async_unlink_done(struct rpc_task *task, void *calldata) struct nfs_unlinkdata *data = calldata; struct inode *dir = data->dir; + trace_nfs_sillyrename_unlink(data, task->tk_status); if (!NFS_PROTO(dir)->unlink_done(task, dir)) - nfs_restart_rpc(task, NFS_SERVER(dir)->nfs_client); + rpc_restart_call_prepare(task); } /** @@ -107,25 +102,16 @@ static void nfs_async_unlink_release(void *calldata) nfs_sb_deactive(sb); } -#if defined(CONFIG_NFS_V4_1) -void nfs_unlink_prepare(struct rpc_task *task, void *calldata) +static void nfs_unlink_prepare(struct rpc_task *task, void *calldata) { struct nfs_unlinkdata *data = calldata; - struct nfs_server *server = NFS_SERVER(data->dir); - - if (nfs4_setup_sequence(server, &data->args.seq_args, - &data->res.seq_res, 1, task)) - return; - rpc_call_start(task); + NFS_PROTO(data->dir)->unlink_rpc_prepare(task, data); } -#endif /* CONFIG_NFS_V4_1 */ static const struct rpc_call_ops nfs_unlink_ops = { .rpc_call_done = nfs_async_unlink_done, .rpc_release = nfs_async_unlink_release, -#if defined(CONFIG_NFS_V4_1) .rpc_call_prepare = nfs_unlink_prepare, -#endif /* CONFIG_NFS_V4_1 */ }; static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct nfs_unlinkdata *data) @@ -147,23 +133,33 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n alias = d_lookup(parent, &data->args.name); if (alias != NULL) { - int ret = 0; + int ret; + void *devname_garbage = NULL; /* * Hey, we raced with lookup... See if we need to transfer * the sillyrename information to the aliased dentry. */ nfs_free_dname(data); + ret = nfs_copy_dname(alias, data); spin_lock(&alias->d_lock); - if (alias->d_inode != NULL && + if (ret == 0 && alias->d_inode != NULL && !(alias->d_flags & DCACHE_NFSFS_RENAMED)) { + devname_garbage = alias->d_fsdata; alias->d_fsdata = data; alias->d_flags |= DCACHE_NFSFS_RENAMED; ret = 1; - } + } else + ret = 0; spin_unlock(&alias->d_lock); nfs_dec_sillycount(dir); dput(alias); + /* + * If we'd displaced old cached devname, free it. At that + * point dentry is definitely not a root, so we won't need + * that anymore. + */ + kfree(devname_garbage); return ret; } data->dir = igrab(dir); @@ -180,7 +176,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n task_setup_data.rpc_client = NFS_CLIENT(dir); task = rpc_run_task(&task_setup_data); if (!IS_ERR(task)) - rpc_put_task(task); + rpc_put_task_async(task); return 1; } @@ -195,8 +191,6 @@ static int nfs_call_unlink(struct dentry *dentry, struct nfs_unlinkdata *data) if (parent == NULL) goto out_free; dir = parent->d_inode; - if (nfs_copy_dname(dentry, data) != 0) - goto out_dput; /* Non-exclusive lock protects against concurrent lookup() calls */ spin_lock(&dir->i_lock); if (atomic_inc_not_zero(&NFS_I(dir)->silly_count) == 0) { @@ -214,6 +208,13 @@ out_free: return ret; } +void nfs_wait_on_sillyrename(struct dentry *dentry) +{ + struct nfs_inode *nfsi = NFS_I(dentry->d_inode); + + wait_event(nfsi->waitqueue, atomic_read(&nfsi->silly_count) <= 1); +} + void nfs_block_sillyrename(struct dentry *dentry) { struct nfs_inode *nfsi = NFS_I(dentry->d_inode); @@ -252,6 +253,7 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry) { struct nfs_unlinkdata *data; int status = -ENOMEM; + void *devname_garbage = NULL; data = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) @@ -269,8 +271,15 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) goto out_unlock; dentry->d_flags |= DCACHE_NFSFS_RENAMED; + devname_garbage = dentry->d_fsdata; dentry->d_fsdata = data; spin_unlock(&dentry->d_lock); + /* + * If we'd displaced old cached devname, free it. At that + * point dentry is definitely not a root, so we won't need + * that anymore. + */ + kfree(devname_garbage); return 0; out_unlock: spin_unlock(&dentry->d_lock); @@ -299,6 +308,7 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { dentry->d_flags &= ~DCACHE_NFSFS_RENAMED; data = dentry->d_fsdata; + dentry->d_fsdata = NULL; } spin_unlock(&dentry->d_lock); @@ -315,6 +325,7 @@ nfs_cancel_async_unlink(struct dentry *dentry) struct nfs_unlinkdata *data = dentry->d_fsdata; dentry->d_flags &= ~DCACHE_NFSFS_RENAMED; + dentry->d_fsdata = NULL; spin_unlock(&dentry->d_lock); nfs_free_unlinkdata(data); return; @@ -322,18 +333,6 @@ nfs_cancel_async_unlink(struct dentry *dentry) spin_unlock(&dentry->d_lock); } -struct nfs_renamedata { - struct nfs_renameargs args; - struct nfs_renameres res; - struct rpc_cred *cred; - struct inode *old_dir; - struct dentry *old_dentry; - struct nfs_fattr old_fattr; - struct inode *new_dir; - struct dentry *new_dentry; - struct nfs_fattr new_fattr; -}; - /** * nfs_async_rename_done - Sillyrename post-processing * @task: rpc_task of the sillyrename @@ -346,19 +345,17 @@ static void nfs_async_rename_done(struct rpc_task *task, void *calldata) struct nfs_renamedata *data = calldata; struct inode *old_dir = data->old_dir; struct inode *new_dir = data->new_dir; + struct dentry *old_dentry = data->old_dentry; + trace_nfs_sillyrename_rename(old_dir, old_dentry, + new_dir, data->new_dentry, task->tk_status); if (!NFS_PROTO(old_dir)->rename_done(task, old_dir, new_dir)) { - nfs_restart_rpc(task, NFS_SERVER(old_dir)->nfs_client); + rpc_restart_call_prepare(task); return; } - if (task->tk_status != 0) { - nfs_cancel_async_unlink(data->old_dentry); - return; - } - - nfs_set_verifier(data->old_dentry, nfs_save_change_attribute(old_dir)); - d_move(data->old_dentry, data->new_dentry); + if (data->complete) + data->complete(task, data); } /** @@ -382,25 +379,16 @@ static void nfs_async_rename_release(void *calldata) kfree(data); } -#if defined(CONFIG_NFS_V4_1) static void nfs_rename_prepare(struct rpc_task *task, void *calldata) { struct nfs_renamedata *data = calldata; - struct nfs_server *server = NFS_SERVER(data->old_dir); - - if (nfs4_setup_sequence(server, &data->args.seq_args, - &data->res.seq_res, 1, task)) - return; - rpc_call_start(task); + NFS_PROTO(data->old_dir)->rename_rpc_prepare(task, data); } -#endif /* CONFIG_NFS_V4_1 */ static const struct rpc_call_ops nfs_rename_ops = { .rpc_call_done = nfs_async_rename_done, .rpc_release = nfs_async_rename_release, -#if defined(CONFIG_NFS_V4_1) .rpc_call_prepare = nfs_rename_prepare, -#endif /* CONFIG_NFS_V4_1 */ }; /** @@ -412,9 +400,10 @@ static const struct rpc_call_ops nfs_rename_ops = { * * It's expected that valid references to the dentries and inodes are held */ -static struct rpc_task * +struct rpc_task * nfs_async_rename(struct inode *old_dir, struct inode *new_dir, - struct dentry *old_dentry, struct dentry *new_dentry) + struct dentry *old_dentry, struct dentry *new_dentry, + void (*complete)(struct rpc_task *, struct nfs_renamedata *)) { struct nfs_renamedata *data; struct rpc_message msg = { }; @@ -429,7 +418,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, data = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) return ERR_PTR(-ENOMEM); - task_setup_data.callback_data = data, + task_setup_data.callback_data = data; data->cred = rpc_lookup_cred(); if (IS_ERR(data->cred)) { @@ -451,6 +440,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, data->new_dentry = dget(new_dentry); nfs_fattr_init(&data->old_fattr); nfs_fattr_init(&data->new_fattr); + data->complete = complete; /* set up nfs_renameargs */ data->args.old_dir = NFS_FH(old_dir); @@ -469,6 +459,35 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, return rpc_run_task(&task_setup_data); } +/* + * Perform tasks needed when a sillyrename is done such as cancelling the + * queued async unlink if it failed. + */ +static void +nfs_complete_sillyrename(struct rpc_task *task, struct nfs_renamedata *data) +{ + struct dentry *dentry = data->old_dentry; + + if (task->tk_status != 0) { + nfs_cancel_async_unlink(dentry); + return; + } + + /* + * vfs_unlink and the like do not issue this when a file is + * sillyrenamed, so do it here. + */ + fsnotify_nameremove(dentry, 0); +} + +#define SILLYNAME_PREFIX ".nfs" +#define SILLYNAME_PREFIX_LEN ((unsigned)sizeof(SILLYNAME_PREFIX) - 1) +#define SILLYNAME_FILEID_LEN ((unsigned)sizeof(u64) << 1) +#define SILLYNAME_COUNTER_LEN ((unsigned)sizeof(unsigned int) << 1) +#define SILLYNAME_LEN (SILLYNAME_PREFIX_LEN + \ + SILLYNAME_FILEID_LEN + \ + SILLYNAME_COUNTER_LEN) + /** * nfs_sillyrename - Perform a silly-rename of a dentry * @dir: inode of directory that contains dentry @@ -481,48 +500,52 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, * and only performs the unlink once the last reference to it is put. * * The final cleanup is done during dentry_iput. + * + * (Note: NFSv4 is stateful, and has opens, so in theory an NFSv4 server + * could take responsibility for keeping open files referenced. The server + * would also need to ensure that opened-but-deleted files were kept over + * reboots. However, we may not assume a server does so. (RFC 5661 + * does provide an OPEN4_RESULT_PRESERVE_UNLINKED flag that a server can + * use to advertise that it does this; some day we may take advantage of + * it.)) */ int nfs_sillyrename(struct inode *dir, struct dentry *dentry) { static unsigned int sillycounter; - const int fileidsize = sizeof(NFS_FILEID(dentry->d_inode))*2; - const int countersize = sizeof(sillycounter)*2; - const int slen = sizeof(".nfs")+fileidsize+countersize-1; - char silly[slen+1]; + unsigned char silly[SILLYNAME_LEN + 1]; + unsigned long long fileid; struct dentry *sdentry; struct rpc_task *task; - int error = -EIO; + int error = -EBUSY; - dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n", - dentry->d_parent->d_name.name, dentry->d_name.name, - atomic_read(&dentry->d_count)); + dfprintk(VFS, "NFS: silly-rename(%pd2, ct=%d)\n", + dentry, d_count(dentry)); nfs_inc_stats(dir, NFSIOS_SILLYRENAME); /* * We don't allow a dentry to be silly-renamed twice. */ - error = -EBUSY; if (dentry->d_flags & DCACHE_NFSFS_RENAMED) goto out; - sprintf(silly, ".nfs%*.*Lx", - fileidsize, fileidsize, - (unsigned long long)NFS_FILEID(dentry->d_inode)); + fileid = NFS_FILEID(dentry->d_inode); /* Return delegation in anticipation of the rename */ - nfs_inode_return_delegation(dentry->d_inode); + NFS_PROTO(dentry->d_inode)->return_delegation(dentry->d_inode); sdentry = NULL; do { - char *suffix = silly + slen - countersize; - + int slen; dput(sdentry); sillycounter++; - sprintf(suffix, "%*.*x", countersize, countersize, sillycounter); + slen = scnprintf(silly, sizeof(silly), + SILLYNAME_PREFIX "%0*llx%0*x", + SILLYNAME_FILEID_LEN, fileid, + SILLYNAME_COUNTER_LEN, sillycounter); - dfprintk(VFS, "NFS: trying to rename %s to %s\n", - dentry->d_name.name, silly); + dfprintk(VFS, "NFS: trying to rename %pd to %s\n", + dentry, silly); sdentry = lookup_one_len(silly, dentry->d_parent, slen); /* @@ -540,8 +563,17 @@ nfs_sillyrename(struct inode *dir, struct dentry *dentry) if (error) goto out_dput; + /* populate unlinkdata with the right dname */ + error = nfs_copy_dname(sdentry, + (struct nfs_unlinkdata *)dentry->d_fsdata); + if (error) { + nfs_cancel_async_unlink(dentry); + goto out_dput; + } + /* run the rename task, undo unlink if it fails */ - task = nfs_async_rename(dir, dir, dentry, sdentry); + task = nfs_async_rename(dir, dir, dentry, sdentry, + nfs_complete_sillyrename); if (IS_ERR(task)) { error = -EBUSY; nfs_cancel_async_unlink(dentry); @@ -552,6 +584,18 @@ nfs_sillyrename(struct inode *dir, struct dentry *dentry) error = rpc_wait_for_completion_task(task); if (error == 0) error = task->tk_status; + switch (error) { + case 0: + /* The rename succeeded */ + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + d_move(dentry, sdentry); + break; + case -ERESTARTSYS: + /* The result of the rename is unknown. Play it safe by + * forcing a new lookup */ + d_drop(dentry); + d_drop(sdentry); + } rpc_put_task(task); out_dput: dput(sdentry); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 4c14c17a527..5e2f1030454 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -20,6 +20,7 @@ #include <linux/nfs_mount.h> #include <linux/nfs_page.h> #include <linux/backing-dev.h> +#include <linux/export.h> #include <asm/uaccess.h> @@ -28,6 +29,9 @@ #include "iostat.h" #include "nfs4_fs.h" #include "fscache.h" +#include "pnfs.h" + +#include "nfstrace.h" #define NFSDBG_FACILITY NFSDBG_PAGECACHE @@ -37,20 +41,21 @@ /* * Local function declarations */ -static void nfs_pageio_init_write(struct nfs_pageio_descriptor *desc, - struct inode *inode, int ioflags); static void nfs_redirty_request(struct nfs_page *req); -static const struct rpc_call_ops nfs_write_partial_ops; -static const struct rpc_call_ops nfs_write_full_ops; static const struct rpc_call_ops nfs_commit_ops; +static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops; +static const struct nfs_commit_completion_ops nfs_commit_completion_ops; +static const struct nfs_rw_ops nfs_rw_write_ops; +static void nfs_clear_request_commit(struct nfs_page *req); static struct kmem_cache *nfs_wdata_cachep; static mempool_t *nfs_wdata_mempool; +static struct kmem_cache *nfs_cdata_cachep; static mempool_t *nfs_commit_mempool; -struct nfs_write_data *nfs_commitdata_alloc(void) +struct nfs_commit_data *nfs_commitdata_alloc(void) { - struct nfs_write_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOFS); + struct nfs_commit_data *p = mempool_alloc(nfs_commit_mempool, GFP_NOIO); if (p) { memset(p, 0, sizeof(*p)); @@ -58,46 +63,26 @@ struct nfs_write_data *nfs_commitdata_alloc(void) } return p; } +EXPORT_SYMBOL_GPL(nfs_commitdata_alloc); -void nfs_commit_free(struct nfs_write_data *p) +void nfs_commit_free(struct nfs_commit_data *p) { - if (p && (p->pagevec != &p->page_array[0])) - kfree(p->pagevec); mempool_free(p, nfs_commit_mempool); } +EXPORT_SYMBOL_GPL(nfs_commit_free); -struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount) +static struct nfs_rw_header *nfs_writehdr_alloc(void) { - struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, GFP_NOFS); + struct nfs_rw_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO); - if (p) { + if (p) memset(p, 0, sizeof(*p)); - INIT_LIST_HEAD(&p->pages); - p->npages = pagecount; - if (pagecount <= ARRAY_SIZE(p->page_array)) - p->pagevec = p->page_array; - else { - p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_NOFS); - if (!p->pagevec) { - mempool_free(p, nfs_wdata_mempool); - p = NULL; - } - } - } return p; } -void nfs_writedata_free(struct nfs_write_data *p) -{ - if (p && (p->pagevec != &p->page_array[0])) - kfree(p->pagevec); - mempool_free(p, nfs_wdata_mempool); -} - -static void nfs_writedata_release(struct nfs_write_data *wdata) +static void nfs_writehdr_free(struct nfs_rw_header *whdr) { - put_nfs_open_context(wdata->args.context); - nfs_writedata_free(wdata); + mempool_free(whdr, nfs_wdata_mempool); } static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) @@ -107,25 +92,53 @@ static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); } -static struct nfs_page *nfs_page_find_request_locked(struct page *page) +/* + * nfs_page_find_head_request_locked - find head request associated with @page + * + * must be called while holding the inode lock. + * + * returns matching head request with reference held, or NULL if not found. + */ +static struct nfs_page * +nfs_page_find_head_request_locked(struct nfs_inode *nfsi, struct page *page) { struct nfs_page *req = NULL; - if (PagePrivate(page)) { + if (PagePrivate(page)) req = (struct nfs_page *)page_private(page); - if (req != NULL) - kref_get(&req->wb_kref); + else if (unlikely(PageSwapCache(page))) { + struct nfs_page *freq, *t; + + /* Linearly search the commit list for the correct req */ + list_for_each_entry_safe(freq, t, &nfsi->commit_info.list, wb_list) { + if (freq->wb_page == page) { + req = freq->wb_head; + break; + } + } + } + + if (req) { + WARN_ON_ONCE(req->wb_head != req); + + kref_get(&req->wb_kref); } + return req; } -static struct nfs_page *nfs_page_find_request(struct page *page) +/* + * nfs_page_find_head_request - find head request associated with @page + * + * returns matching head request with reference held, or NULL if not found. + */ +static struct nfs_page *nfs_page_find_head_request(struct page *page) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; struct nfs_page *req = NULL; spin_lock(&inode->i_lock); - req = nfs_page_find_request_locked(page); + req = nfs_page_find_head_request_locked(NFS_I(inode), page); spin_unlock(&inode->i_lock); return req; } @@ -133,16 +146,16 @@ static struct nfs_page *nfs_page_find_request(struct page *page) /* Adjust the file length if we're writing beyond the end */ static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; loff_t end, i_size; pgoff_t end_index; spin_lock(&inode->i_lock); i_size = i_size_read(inode); end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; - if (i_size > 0 && page->index < end_index) + if (i_size > 0 && page_file_index(page) < end_index) goto out; - end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count); + end = page_file_offset(page) + ((loff_t)offset+count); if (i_size >= end) goto out; i_size_write(inode, end); @@ -154,22 +167,81 @@ out: /* A writeback failed: mark the page as bad, and invalidate the page cache */ static void nfs_set_pageerror(struct page *page) { - SetPageError(page); - nfs_zap_mapping(page->mapping->host, page->mapping); + nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page)); +} + +/* + * nfs_page_group_search_locked + * @head - head request of page group + * @page_offset - offset into page + * + * Search page group with head @head to find a request that contains the + * page offset @page_offset. + * + * Returns a pointer to the first matching nfs request, or NULL if no + * match is found. + * + * Must be called with the page group lock held + */ +static struct nfs_page * +nfs_page_group_search_locked(struct nfs_page *head, unsigned int page_offset) +{ + struct nfs_page *req; + + WARN_ON_ONCE(head != head->wb_head); + WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_head->wb_flags)); + + req = head; + do { + if (page_offset >= req->wb_pgbase && + page_offset < (req->wb_pgbase + req->wb_bytes)) + return req; + + req = req->wb_this_page; + } while (req != head); + + return NULL; +} + +/* + * nfs_page_group_covers_page + * @head - head request of page group + * + * Return true if the page group with head @head covers the whole page, + * returns false otherwise + */ +static bool nfs_page_group_covers_page(struct nfs_page *req) +{ + struct nfs_page *tmp; + unsigned int pos = 0; + unsigned int len = nfs_page_length(req->wb_page); + + nfs_page_group_lock(req); + + do { + tmp = nfs_page_group_search_locked(req->wb_head, pos); + if (tmp) { + /* no way this should happen */ + WARN_ON_ONCE(tmp->wb_pgbase != pos); + pos += tmp->wb_bytes - (pos - tmp->wb_pgbase); + } + } while (tmp && pos < len); + + nfs_page_group_unlock(req); + WARN_ON_ONCE(pos > len); + return pos == len; } /* We can set the PG_uptodate flag if we see that a write request * covers the full page. */ -static void nfs_mark_uptodate(struct page *page, unsigned int base, unsigned int count) +static void nfs_mark_uptodate(struct nfs_page *req) { - if (PageUptodate(page)) - return; - if (base != 0) + if (PageUptodate(req->wb_page)) return; - if (count != nfs_page_length(page)) + if (!nfs_page_group_covers_page(req)) return; - SetPageUptodate(page); + SetPageUptodate(req->wb_page); } static int wb_priority(struct writeback_control *wbc) @@ -177,8 +249,8 @@ static int wb_priority(struct writeback_control *wbc) if (wbc->for_reclaim) return FLUSH_HIGHPRI | FLUSH_STABLE; if (wbc->for_kupdate || wbc->for_background) - return FLUSH_LOWPRI; - return 0; + return FLUSH_LOWPRI | FLUSH_COND_STABLE; + return FLUSH_COND_STABLE; } /* @@ -191,65 +263,273 @@ int nfs_congestion_kb; #define NFS_CONGESTION_OFF_THRESH \ (NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2)) -static int nfs_set_page_writeback(struct page *page) +static void nfs_set_page_writeback(struct page *page) { + struct nfs_server *nfss = NFS_SERVER(page_file_mapping(page)->host); int ret = test_set_page_writeback(page); - if (!ret) { - struct inode *inode = page->mapping->host; - struct nfs_server *nfss = NFS_SERVER(inode); + WARN_ON_ONCE(ret != 0); - page_cache_get(page); - if (atomic_long_inc_return(&nfss->writeback) > - NFS_CONGESTION_ON_THRESH) { - set_bdi_congested(&nfss->backing_dev_info, - BLK_RW_ASYNC); - } + if (atomic_long_inc_return(&nfss->writeback) > + NFS_CONGESTION_ON_THRESH) { + set_bdi_congested(&nfss->backing_dev_info, + BLK_RW_ASYNC); } - return ret; } -static void nfs_end_page_writeback(struct page *page) +static void nfs_end_page_writeback(struct nfs_page *req) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(req->wb_page)->host; struct nfs_server *nfss = NFS_SERVER(inode); - end_page_writeback(page); - page_cache_release(page); + if (!nfs_page_group_sync_on_bit(req, PG_WB_END)) + return; + + end_page_writeback(req->wb_page); if (atomic_long_dec_return(&nfss->writeback) < NFS_CONGESTION_OFF_THRESH) clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC); } -static struct nfs_page *nfs_find_and_lock_request(struct page *page, bool nonblock) + +/* nfs_page_group_clear_bits + * @req - an nfs request + * clears all page group related bits from @req + */ +static void +nfs_page_group_clear_bits(struct nfs_page *req) { - struct inode *inode = page->mapping->host; - struct nfs_page *req; + clear_bit(PG_TEARDOWN, &req->wb_flags); + clear_bit(PG_UNLOCKPAGE, &req->wb_flags); + clear_bit(PG_UPTODATE, &req->wb_flags); + clear_bit(PG_WB_END, &req->wb_flags); + clear_bit(PG_REMOVE, &req->wb_flags); +} + + +/* + * nfs_unroll_locks_and_wait - unlock all newly locked reqs and wait on @req + * + * this is a helper function for nfs_lock_and_join_requests + * + * @inode - inode associated with request page group, must be holding inode lock + * @head - head request of page group, must be holding head lock + * @req - request that couldn't lock and needs to wait on the req bit lock + * @nonblock - if true, don't actually wait + * + * NOTE: this must be called holding page_group bit lock and inode spin lock + * and BOTH will be released before returning. + * + * returns 0 on success, < 0 on error. + */ +static int +nfs_unroll_locks_and_wait(struct inode *inode, struct nfs_page *head, + struct nfs_page *req, bool nonblock) + __releases(&inode->i_lock) +{ + struct nfs_page *tmp; + int ret; + + /* relinquish all the locks successfully grabbed this run */ + for (tmp = head ; tmp != req; tmp = tmp->wb_this_page) + nfs_unlock_request(tmp); + + WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags)); + + /* grab a ref on the request that will be waited on */ + kref_get(&req->wb_kref); + + nfs_page_group_unlock(head); + spin_unlock(&inode->i_lock); + + /* release ref from nfs_page_find_head_request_locked */ + nfs_release_request(head); + + if (!nonblock) + ret = nfs_wait_on_request(req); + else + ret = -EAGAIN; + nfs_release_request(req); + + return ret; +} + +/* + * nfs_destroy_unlinked_subrequests - destroy recently unlinked subrequests + * + * @destroy_list - request list (using wb_this_page) terminated by @old_head + * @old_head - the old head of the list + * + * All subrequests must be locked and removed from all lists, so at this point + * they are only "active" in this function, and possibly in nfs_wait_on_request + * with a reference held by some other context. + */ +static void +nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list, + struct nfs_page *old_head) +{ + while (destroy_list) { + struct nfs_page *subreq = destroy_list; + + destroy_list = (subreq->wb_this_page == old_head) ? + NULL : subreq->wb_this_page; + + WARN_ON_ONCE(old_head != subreq->wb_head); + + /* make sure old group is not used */ + subreq->wb_head = subreq; + subreq->wb_this_page = subreq; + + nfs_clear_request_commit(subreq); + + /* subreq is now totally disconnected from page group or any + * write / commit lists. last chance to wake any waiters */ + nfs_unlock_request(subreq); + + if (!test_bit(PG_TEARDOWN, &subreq->wb_flags)) { + /* release ref on old head request */ + nfs_release_request(old_head); + + nfs_page_group_clear_bits(subreq); + + /* release the PG_INODE_REF reference */ + if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) + nfs_release_request(subreq); + else + WARN_ON_ONCE(1); + } else { + WARN_ON_ONCE(test_bit(PG_CLEAN, &subreq->wb_flags)); + /* zombie requests have already released the last + * reference and were waiting on the rest of the + * group to complete. Since it's no longer part of a + * group, simply free the request */ + nfs_page_group_clear_bits(subreq); + nfs_free_request(subreq); + } + } +} + +/* + * nfs_lock_and_join_requests - join all subreqs to the head req and return + * a locked reference, cancelling any pending + * operations for this page. + * + * @page - the page used to lookup the "page group" of nfs_page structures + * @nonblock - if true, don't block waiting for request locks + * + * This function joins all sub requests to the head request by first + * locking all requests in the group, cancelling any pending operations + * and finally updating the head request to cover the whole range covered by + * the (former) group. All subrequests are removed from any write or commit + * lists, unlinked from the group and destroyed. + * + * Returns a locked, referenced pointer to the head request - which after + * this call is guaranteed to be the only request associated with the page. + * Returns NULL if no requests are found for @page, or a ERR_PTR if an + * error was encountered. + */ +static struct nfs_page * +nfs_lock_and_join_requests(struct page *page, bool nonblock) +{ + struct inode *inode = page_file_mapping(page)->host; + struct nfs_page *head, *subreq; + struct nfs_page *destroy_list = NULL; + unsigned int total_bytes; int ret; +try_again: + total_bytes = 0; + + WARN_ON_ONCE(destroy_list); + spin_lock(&inode->i_lock); - for (;;) { - req = nfs_page_find_request_locked(page); - if (req == NULL) - break; - if (nfs_set_page_tag_locked(req)) - break; - /* Note: If we hold the page lock, as is the case in nfs_writepage, - * then the call to nfs_set_page_tag_locked() will always - * succeed provided that someone hasn't already marked the - * request as dirty (in which case we don't care). - */ + + /* + * A reference is taken only on the head request which acts as a + * reference to the whole page group - the group will not be destroyed + * until the head reference is released. + */ + head = nfs_page_find_head_request_locked(NFS_I(inode), page); + + if (!head) { spin_unlock(&inode->i_lock); - if (!nonblock) - ret = nfs_wait_on_request(req); - else - ret = -EAGAIN; - nfs_release_request(req); - if (ret != 0) + return NULL; + } + + /* lock each request in the page group */ + nfs_page_group_lock(head); + subreq = head; + do { + /* + * Subrequests are always contiguous, non overlapping + * and in order. If not, it's a programming error. + */ + WARN_ON_ONCE(subreq->wb_offset != + (head->wb_offset + total_bytes)); + + /* keep track of how many bytes this group covers */ + total_bytes += subreq->wb_bytes; + + if (!nfs_lock_request(subreq)) { + /* releases page group bit lock and + * inode spin lock and all references */ + ret = nfs_unroll_locks_and_wait(inode, head, + subreq, nonblock); + + if (ret == 0) + goto try_again; + return ERR_PTR(ret); - spin_lock(&inode->i_lock); + } + + subreq = subreq->wb_this_page; + } while (subreq != head); + + /* Now that all requests are locked, make sure they aren't on any list. + * Commit list removal accounting is done after locks are dropped */ + subreq = head; + do { + nfs_list_remove_request(subreq); + subreq = subreq->wb_this_page; + } while (subreq != head); + + /* unlink subrequests from head, destroy them later */ + if (head->wb_this_page != head) { + /* destroy list will be terminated by head */ + destroy_list = head->wb_this_page; + head->wb_this_page = head; + + /* change head request to cover whole range that + * the former page group covered */ + head->wb_bytes = total_bytes; } + + /* + * prepare head request to be added to new pgio descriptor + */ + nfs_page_group_clear_bits(head); + + /* + * some part of the group was still on the inode list - otherwise + * the group wouldn't be involved in async write. + * grab a reference for the head request, iff it needs one. + */ + if (!test_and_set_bit(PG_INODE_REF, &head->wb_flags)) + kref_get(&head->wb_kref); + + nfs_page_group_unlock(head); + + /* drop lock to clear_request_commit the head req and clean up + * requests on destroy list */ spin_unlock(&inode->i_lock); - return req; + + nfs_destroy_unlinked_subrequests(destroy_list, head); + + /* clean up commit list state */ + nfs_clear_request_commit(head); + + /* still holds ref on head from nfs_page_find_head_request_locked + * and still has lock on head from lock loop */ + return head; } /* @@ -262,17 +542,17 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio, struct nfs_page *req; int ret = 0; - req = nfs_find_and_lock_request(page, nonblock); + req = nfs_lock_and_join_requests(page, nonblock); if (!req) goto out; ret = PTR_ERR(req); if (IS_ERR(req)) goto out; - ret = nfs_set_page_writeback(page); - BUG_ON(ret != 0); - BUG_ON(test_bit(PG_CLEAN, &req->wb_flags)); + nfs_set_page_writeback(page); + WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags)); + ret = 0; if (!nfs_pageio_add_request(pgio, req)) { nfs_redirty_request(req); ret = pgio->pg_error; @@ -283,13 +563,13 @@ out: static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, struct nfs_pageio_descriptor *pgio) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; int ret; nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE); nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1); - nfs_pageio_cond_complete(pgio, page->index); + nfs_pageio_cond_complete(pgio, page_file_index(page)); ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE); if (ret == -EAGAIN) { redirty_page_for_writepage(wbc, page); @@ -306,7 +586,8 @@ static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc struct nfs_pageio_descriptor pgio; int err; - nfs_pageio_init_write(&pgio, page->mapping->host, wb_priority(wbc)); + nfs_pageio_init_write(&pgio, page->mapping->host, wb_priority(wbc), + false, &nfs_async_write_completion_ops); err = nfs_do_writepage(page, wbc, &pgio); nfs_pageio_complete(&pgio); if (err < 0) @@ -349,12 +630,13 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); - nfs_pageio_init_write(&pgio, inode, wb_priority(wbc)); + nfs_pageio_init_write(&pgio, inode, wb_priority(wbc), false, + &nfs_async_write_completion_ops); err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio); nfs_pageio_complete(&pgio); clear_bit_unlock(NFS_INO_FLUSHING, bitlock); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); wake_up_bit(bitlock, NFS_INO_FLUSHING); if (err < 0) @@ -370,36 +652,33 @@ out_err: /* * Insert a write request into an inode */ -static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req) +static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req) { struct nfs_inode *nfsi = NFS_I(inode); - int error; - error = radix_tree_preload(GFP_NOFS); - if (error != 0) - goto out; + WARN_ON_ONCE(req->wb_this_page != req); /* Lock the request! */ - nfs_lock_request_dontget(req); + nfs_lock_request(req); spin_lock(&inode->i_lock); - error = radix_tree_insert(&nfsi->nfs_page_tree, req->wb_index, req); - BUG_ON(error); - if (!nfsi->npages) { - igrab(inode); - if (nfs_have_delegation(inode, FMODE_WRITE)) - nfsi->change_attr++; + if (!nfsi->npages && NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) + inode->i_version++; + /* + * Swap-space should not get truncated. Hence no need to plug the race + * with invalidate/truncate. + */ + if (likely(!PageSwapCache(req->wb_page))) { + set_bit(PG_MAPPED, &req->wb_flags); + SetPagePrivate(req->wb_page); + set_page_private(req->wb_page, (unsigned long)req); } - SetPagePrivate(req->wb_page); - set_page_private(req->wb_page, (unsigned long)req); nfsi->npages++; + /* this a head request for a page group - mark it as having an + * extra reference so sub groups can follow suit */ + WARN_ON(test_and_set_bit(PG_INODE_REF, &req->wb_flags)); kref_get(&req->wb_kref); - radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, - NFS_PAGE_TAG_LOCKED); spin_unlock(&inode->i_lock); - radix_tree_preload_end(); -out: - return error; } /* @@ -407,151 +686,288 @@ out: */ static void nfs_inode_remove_request(struct nfs_page *req) { - struct inode *inode = req->wb_context->path.dentry->d_inode; + struct inode *inode = req->wb_context->dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); + struct nfs_page *head; - BUG_ON (!NFS_WBACK_BUSY(req)); + if (nfs_page_group_sync_on_bit(req, PG_REMOVE)) { + head = req->wb_head; - spin_lock(&inode->i_lock); - set_page_private(req->wb_page, 0); - ClearPagePrivate(req->wb_page); - radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index); - nfsi->npages--; - if (!nfsi->npages) { - spin_unlock(&inode->i_lock); - iput(inode); - } else + spin_lock(&inode->i_lock); + if (likely(!PageSwapCache(head->wb_page))) { + set_page_private(head->wb_page, 0); + ClearPagePrivate(head->wb_page); + clear_bit(PG_MAPPED, &head->wb_flags); + } + nfsi->npages--; spin_unlock(&inode->i_lock); - nfs_clear_request(req); - nfs_release_request(req); + } + + if (test_and_clear_bit(PG_INODE_REF, &req->wb_flags)) + nfs_release_request(req); } static void nfs_mark_request_dirty(struct nfs_page *req) { __set_page_dirty_nobuffers(req->wb_page); - __mark_inode_dirty(req->wb_page->mapping->host, I_DIRTY_DATASYNC); } -#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) +/** + * nfs_request_add_commit_list - add request to a commit list + * @req: pointer to a struct nfs_page + * @dst: commit list head + * @cinfo: holds list lock and accounting info + * + * This sets the PG_CLEAN bit, updates the cinfo count of + * number of outstanding requests requiring a commit as well as + * the MM page stats. + * + * The caller must _not_ hold the cinfo->lock, but must be + * holding the nfs_page lock. + */ +void +nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst, + struct nfs_commit_info *cinfo) +{ + set_bit(PG_CLEAN, &(req)->wb_flags); + spin_lock(cinfo->lock); + nfs_list_add_request(req, dst); + cinfo->mds->ncommit++; + spin_unlock(cinfo->lock); + if (!cinfo->dreq) { + inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info, + BDI_RECLAIMABLE); + __mark_inode_dirty(req->wb_context->dentry->d_inode, + I_DIRTY_DATASYNC); + } +} +EXPORT_SYMBOL_GPL(nfs_request_add_commit_list); + +/** + * nfs_request_remove_commit_list - Remove request from a commit list + * @req: pointer to a nfs_page + * @cinfo: holds list lock and accounting info + * + * This clears the PG_CLEAN bit, and updates the cinfo's count of + * number of outstanding requests requiring a commit + * It does not update the MM page stats. + * + * The caller _must_ hold the cinfo->lock and the nfs_page lock. + */ +void +nfs_request_remove_commit_list(struct nfs_page *req, + struct nfs_commit_info *cinfo) +{ + if (!test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) + return; + nfs_list_remove_request(req); + cinfo->mds->ncommit--; +} +EXPORT_SYMBOL_GPL(nfs_request_remove_commit_list); + +static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, + struct inode *inode) +{ + cinfo->lock = &inode->i_lock; + cinfo->mds = &NFS_I(inode)->commit_info; + cinfo->ds = pnfs_get_ds_info(inode); + cinfo->dreq = NULL; + cinfo->completion_ops = &nfs_commit_completion_ops; +} + +void nfs_init_cinfo(struct nfs_commit_info *cinfo, + struct inode *inode, + struct nfs_direct_req *dreq) +{ + if (dreq) + nfs_init_cinfo_from_dreq(cinfo, dreq); + else + nfs_init_cinfo_from_inode(cinfo, inode); +} +EXPORT_SYMBOL_GPL(nfs_init_cinfo); + /* * Add a request to the inode's commit list. */ -static void -nfs_mark_request_commit(struct nfs_page *req) +void +nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) { - struct inode *inode = req->wb_context->path.dentry->d_inode; - struct nfs_inode *nfsi = NFS_I(inode); + if (pnfs_mark_request_commit(req, lseg, cinfo)) + return; + nfs_request_add_commit_list(req, &cinfo->mds->list, cinfo); +} - spin_lock(&inode->i_lock); - set_bit(PG_CLEAN, &(req)->wb_flags); - radix_tree_tag_set(&nfsi->nfs_page_tree, - req->wb_index, - NFS_PAGE_TAG_COMMIT); - nfsi->ncommit++; - spin_unlock(&inode->i_lock); - inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); - inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_RECLAIMABLE); - __mark_inode_dirty(inode, I_DIRTY_DATASYNC); +static void +nfs_clear_page_commit(struct page *page) +{ + dec_zone_page_state(page, NR_UNSTABLE_NFS); + dec_bdi_stat(page_file_mapping(page)->backing_dev_info, BDI_RECLAIMABLE); } -static int +static void nfs_clear_request_commit(struct nfs_page *req) { - struct page *page = req->wb_page; + if (test_bit(PG_CLEAN, &req->wb_flags)) { + struct inode *inode = req->wb_context->dentry->d_inode; + struct nfs_commit_info cinfo; - if (test_and_clear_bit(PG_CLEAN, &(req)->wb_flags)) { - dec_zone_page_state(page, NR_UNSTABLE_NFS); - dec_bdi_stat(page->mapping->backing_dev_info, BDI_RECLAIMABLE); - return 1; + nfs_init_cinfo_from_inode(&cinfo, inode); + if (!pnfs_clear_request_commit(req, &cinfo)) { + spin_lock(cinfo.lock); + nfs_request_remove_commit_list(req, &cinfo); + spin_unlock(cinfo.lock); + } + nfs_clear_page_commit(req->wb_page); } - return 0; } static inline -int nfs_write_need_commit(struct nfs_write_data *data) +int nfs_write_need_commit(struct nfs_pgio_data *data) { + if (data->verf.committed == NFS_DATA_SYNC) + return data->header->lseg == NULL; return data->verf.committed != NFS_FILE_SYNC; } -static inline -int nfs_reschedule_unstable_write(struct nfs_page *req) +#else +static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo, + struct inode *inode) { - if (test_and_clear_bit(PG_NEED_COMMIT, &req->wb_flags)) { - nfs_mark_request_commit(req); - return 1; - } - if (test_and_clear_bit(PG_NEED_RESCHED, &req->wb_flags)) { - nfs_mark_request_dirty(req); - return 1; - } - return 0; } -#else -static inline void -nfs_mark_request_commit(struct nfs_page *req) + +void nfs_init_cinfo(struct nfs_commit_info *cinfo, + struct inode *inode, + struct nfs_direct_req *dreq) { } -static inline int -nfs_clear_request_commit(struct nfs_page *req) +void +nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) { - return 0; } -static inline -int nfs_write_need_commit(struct nfs_write_data *data) +static void +nfs_clear_request_commit(struct nfs_page *req) { - return 0; } static inline -int nfs_reschedule_unstable_write(struct nfs_page *req) +int nfs_write_need_commit(struct nfs_pgio_data *data) { return 0; } + #endif -#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) -static int -nfs_need_commit(struct nfs_inode *nfsi) +static void nfs_write_completion(struct nfs_pgio_header *hdr) +{ + struct nfs_commit_info cinfo; + unsigned long bytes = 0; + + if (test_bit(NFS_IOHDR_REDO, &hdr->flags)) + goto out; + nfs_init_cinfo_from_inode(&cinfo, hdr->inode); + while (!list_empty(&hdr->pages)) { + struct nfs_page *req = nfs_list_entry(hdr->pages.next); + + bytes += req->wb_bytes; + nfs_list_remove_request(req); + if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) && + (hdr->good_bytes < bytes)) { + nfs_set_pageerror(req->wb_page); + nfs_context_set_write_error(req->wb_context, hdr->error); + goto remove_req; + } + if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) { + nfs_mark_request_dirty(req); + goto next; + } + if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) { + memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf)); + nfs_mark_request_commit(req, hdr->lseg, &cinfo); + goto next; + } +remove_req: + nfs_inode_remove_request(req); +next: + nfs_unlock_request(req); + nfs_end_page_writeback(req); + nfs_release_request(req); + } +out: + hdr->release(hdr); +} + +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) +unsigned long +nfs_reqs_to_commit(struct nfs_commit_info *cinfo) +{ + return cinfo->mds->ncommit; +} + +/* cinfo->lock held by caller */ +int +nfs_scan_commit_list(struct list_head *src, struct list_head *dst, + struct nfs_commit_info *cinfo, int max) { - return radix_tree_tagged(&nfsi->nfs_page_tree, NFS_PAGE_TAG_COMMIT); + struct nfs_page *req, *tmp; + int ret = 0; + + list_for_each_entry_safe(req, tmp, src, wb_list) { + if (!nfs_lock_request(req)) + continue; + kref_get(&req->wb_kref); + if (cond_resched_lock(cinfo->lock)) + list_safe_reset_next(req, tmp, wb_list); + nfs_request_remove_commit_list(req, cinfo); + nfs_list_add_request(req, dst); + ret++; + if ((ret == max) && !cinfo->dreq) + break; + } + return ret; } /* * nfs_scan_commit - Scan an inode for commit requests * @inode: NFS inode to scan - * @dst: destination list - * @idx_start: lower bound of page->index to scan. - * @npages: idx_start + npages sets the upper bound to scan. + * @dst: mds destination list + * @cinfo: mds and ds lists of reqs ready to commit * * Moves requests from the inode's 'commit' request list. * The requests are *not* checked to ensure that they form a contiguous set. */ -static int -nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, unsigned int npages) +int +nfs_scan_commit(struct inode *inode, struct list_head *dst, + struct nfs_commit_info *cinfo) { - struct nfs_inode *nfsi = NFS_I(inode); - int ret; + int ret = 0; - if (!nfs_need_commit(nfsi)) - return 0; + spin_lock(cinfo->lock); + if (cinfo->mds->ncommit > 0) { + const int max = INT_MAX; - ret = nfs_scan_list(nfsi, dst, idx_start, npages, NFS_PAGE_TAG_COMMIT); - if (ret > 0) - nfsi->ncommit -= ret; - if (nfs_need_commit(NFS_I(inode))) - __mark_inode_dirty(inode, I_DIRTY_DATASYNC); + ret = nfs_scan_commit_list(&cinfo->mds->list, dst, + cinfo, max); + ret += pnfs_scan_commit_lists(inode, cinfo, max - ret); + } + spin_unlock(cinfo->lock); return ret; } + #else -static inline int nfs_need_commit(struct nfs_inode *nfsi) +unsigned long nfs_reqs_to_commit(struct nfs_commit_info *cinfo) { return 0; } -static inline int nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, unsigned int npages) +int nfs_scan_commit(struct inode *inode, struct list_head *dst, + struct nfs_commit_info *cinfo) { return 0; } @@ -581,10 +997,14 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode, spin_lock(&inode->i_lock); for (;;) { - req = nfs_page_find_request_locked(page); + req = nfs_page_find_head_request_locked(NFS_I(inode), page); if (req == NULL) goto out_unlock; + /* should be handled by nfs_flush_incompatible */ + WARN_ON_ONCE(req->wb_head != req); + WARN_ON_ONCE(req->wb_this_page != req); + rqend = req->wb_offset + req->wb_bytes; /* * Tell the caller to flush out the request if @@ -596,7 +1016,7 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode, || end < req->wb_offset) goto out_flushme; - if (nfs_set_page_tag_locked(req)) + if (nfs_lock_request(req)) break; /* The request is locked, so wait and then retry */ @@ -608,11 +1028,6 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode, spin_lock(&inode->i_lock); } - if (nfs_clear_request_commit(req) && - radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree, - req->wb_index, NFS_PAGE_TAG_COMMIT) != NULL) - NFS_I(inode)->ncommit--; - /* Okay, the request matches. Update the region */ if (offset < req->wb_offset) { req->wb_offset = offset; @@ -624,6 +1039,8 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode, req->wb_bytes = rqend - req->wb_offset; out_unlock: spin_unlock(&inode->i_lock); + if (req) + nfs_clear_request_commit(req); return req; out_flushme: spin_unlock(&inode->i_lock); @@ -643,21 +1060,16 @@ out_err: static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx, struct page *page, unsigned int offset, unsigned int bytes) { - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; struct nfs_page *req; - int error; req = nfs_try_to_update_request(inode, page, offset, bytes); if (req != NULL) goto out; - req = nfs_create_request(ctx, inode, page, offset, bytes); + req = nfs_create_request(ctx, page, NULL, offset, bytes); if (IS_ERR(req)) goto out; - error = nfs_inode_add_request(inode, req); - if (error != 0) { - nfs_release_request(req); - req = ERR_PTR(error); - } + nfs_inode_add_request(inode, req); out: return req; } @@ -670,18 +1082,18 @@ static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page, req = nfs_setup_write_request(ctx, page, offset, count); if (IS_ERR(req)) return PTR_ERR(req); - nfs_mark_request_dirty(req); /* Update file length */ nfs_grow_file(page, offset, count); - nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes); + nfs_mark_uptodate(req); nfs_mark_request_dirty(req); - nfs_clear_page_tag_locked(req); + nfs_unlock_and_release_request(req); return 0; } int nfs_flush_incompatible(struct file *file, struct page *page) { struct nfs_open_context *ctx = nfs_file_open_context(file); + struct nfs_lock_context *l_ctx; struct nfs_page *req; int do_flush, status; /* @@ -693,29 +1105,95 @@ int nfs_flush_incompatible(struct file *file, struct page *page) * dropped page. */ do { - req = nfs_page_find_request(page); + req = nfs_page_find_head_request(page); if (req == NULL) return 0; - do_flush = req->wb_page != page || req->wb_context != ctx || - req->wb_lock_context->lockowner != current->files || - req->wb_lock_context->pid != current->tgid; + l_ctx = req->wb_lock_context; + do_flush = req->wb_page != page || req->wb_context != ctx; + /* for now, flush if more than 1 request in page_group */ + do_flush |= req->wb_this_page != req; + if (l_ctx && ctx->dentry->d_inode->i_flock != NULL) { + do_flush |= l_ctx->lockowner.l_owner != current->files + || l_ctx->lockowner.l_pid != current->tgid; + } nfs_release_request(req); if (!do_flush) return 0; - status = nfs_wb_page(page->mapping->host, page); + status = nfs_wb_page(page_file_mapping(page)->host, page); } while (status == 0); return status; } /* + * Avoid buffered writes when a open context credential's key would + * expire soon. + * + * Returns -EACCES if the key will expire within RPC_KEY_EXPIRE_FAIL. + * + * Return 0 and set a credential flag which triggers the inode to flush + * and performs NFS_FILE_SYNC writes if the key will expired within + * RPC_KEY_EXPIRE_TIMEO. + */ +int +nfs_key_timeout_notify(struct file *filp, struct inode *inode) +{ + struct nfs_open_context *ctx = nfs_file_open_context(filp); + struct rpc_auth *auth = NFS_SERVER(inode)->client->cl_auth; + + return rpcauth_key_timeout_notify(auth, ctx->cred); +} + +/* + * Test if the open context credential key is marked to expire soon. + */ +bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx) +{ + return rpcauth_cred_key_to_expire(ctx->cred); +} + +/* * If the page cache is marked as unsafe or invalid, then we can't rely on * the PageUptodate() flag. In this case, we will need to turn off * write optimisations that depend on the page contents being correct. */ -static int nfs_write_pageuptodate(struct page *page, struct inode *inode) +static bool nfs_write_pageuptodate(struct page *page, struct inode *inode) { - return PageUptodate(page) && - !(NFS_I(inode)->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA)); + struct nfs_inode *nfsi = NFS_I(inode); + + if (nfs_have_delegated_attributes(inode)) + goto out; + if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) + return false; + smp_rmb(); + if (test_bit(NFS_INO_INVALIDATING, &nfsi->flags)) + return false; +out: + if (nfsi->cache_validity & NFS_INO_INVALID_DATA) + return false; + return PageUptodate(page) != 0; +} + +/* If we know the page is up to date, and we're not using byte range locks (or + * if we have the whole file locked for writing), it may be more efficient to + * extend the write to cover the entire page in order to avoid fragmentation + * inefficiencies. + * + * If the file is opened for synchronous writes then we can just skip the rest + * of the checks. + */ +static int nfs_can_extend_write(struct file *file, struct page *page, struct inode *inode) +{ + if (file->f_flags & O_DSYNC) + return 0; + if (!nfs_write_pageuptodate(page, inode)) + return 0; + if (NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) + return 1; + if (inode->i_flock == NULL || (inode->i_flock->fl_start == 0 && + inode->i_flock->fl_end == OFFSET_MAX && + inode->i_flock->fl_type != F_RDLCK)) + return 1; + return 0; } /* @@ -728,24 +1206,15 @@ int nfs_updatepage(struct file *file, struct page *page, unsigned int offset, unsigned int count) { struct nfs_open_context *ctx = nfs_file_open_context(file); - struct inode *inode = page->mapping->host; + struct inode *inode = page_file_mapping(page)->host; int status = 0; nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE); - dprintk("NFS: nfs_updatepage(%s/%s %d@%lld)\n", - file->f_path.dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name, count, - (long long)(page_offset(page) + offset)); + dprintk("NFS: nfs_updatepage(%pD2 %d@%lld)\n", + file, count, (long long)(page_file_offset(page) + offset)); - /* If we're not using byte range locks, and we know the page - * is up to date, it may be more efficient to extend the write - * to cover the entire page in order to avoid fragmentation - * inefficiencies. - */ - if (nfs_write_pageuptodate(page, inode) && - inode->i_flock == NULL && - !(file->f_flags & O_DSYNC)) { + if (nfs_can_extend_write(file, page, inode)) { count = max(count + offset, nfs_page_length(page)); offset = 0; } @@ -753,22 +1222,14 @@ int nfs_updatepage(struct file *file, struct page *page, status = nfs_writepage_setup(ctx, page, offset, count); if (status < 0) nfs_set_pageerror(page); + else + __set_page_dirty_nobuffers(page); dprintk("NFS: nfs_updatepage returns %d (isize %lld)\n", status, (long long)i_size_read(inode)); return status; } -static void nfs_writepage_release(struct nfs_page *req) -{ - struct page *page = req->wb_page; - - if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) - nfs_inode_remove_request(req); - nfs_clear_page_tag_locked(req); - nfs_end_page_writeback(page); -} - static int flush_task_priority(int how) { switch (how & (FLUSH_HIGHPRI|FLUSH_LOWPRI)) { @@ -780,85 +1241,17 @@ static int flush_task_priority(int how) return RPC_PRIORITY_NORMAL; } -/* - * Set up the argument/result storage required for the RPC call. - */ -static int nfs_write_rpcsetup(struct nfs_page *req, - struct nfs_write_data *data, - const struct rpc_call_ops *call_ops, - unsigned int count, unsigned int offset, - int how) +static void nfs_initiate_write(struct nfs_pgio_data *data, struct rpc_message *msg, + struct rpc_task_setup *task_setup_data, int how) { - struct inode *inode = req->wb_context->path.dentry->d_inode; + struct inode *inode = data->header->inode; int priority = flush_task_priority(how); - struct rpc_task *task; - struct rpc_message msg = { - .rpc_argp = &data->args, - .rpc_resp = &data->res, - .rpc_cred = req->wb_context->cred, - }; - struct rpc_task_setup task_setup_data = { - .rpc_client = NFS_CLIENT(inode), - .task = &data->task, - .rpc_message = &msg, - .callback_ops = call_ops, - .callback_data = data, - .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, - .priority = priority, - }; - int ret = 0; - /* Set up the RPC argument and reply structs - * NB: take care not to mess about with data->commit et al. */ - - data->req = req; - data->inode = inode = req->wb_context->path.dentry->d_inode; - data->cred = msg.rpc_cred; - - data->args.fh = NFS_FH(inode); - data->args.offset = req_offset(req) + offset; - data->args.pgbase = req->wb_pgbase + offset; - data->args.pages = data->pagevec; - data->args.count = count; - data->args.context = get_nfs_open_context(req->wb_context); - data->args.lock_context = req->wb_lock_context; - data->args.stable = NFS_UNSTABLE; - if (how & FLUSH_STABLE) { - data->args.stable = NFS_DATA_SYNC; - if (!nfs_need_commit(NFS_I(inode))) - data->args.stable = NFS_FILE_SYNC; - } - - data->res.fattr = &data->fattr; - data->res.count = count; - data->res.verf = &data->verf; - nfs_fattr_init(&data->fattr); - - /* Set up the initial task struct. */ - NFS_PROTO(inode)->write_setup(data, &msg); + task_setup_data->priority = priority; + NFS_PROTO(inode)->write_setup(data, msg); - dprintk("NFS: %5u initiated write call " - "(req %s/%lld, %u bytes @ offset %llu)\n", - data->task.tk_pid, - inode->i_sb->s_id, - (long long)NFS_FILEID(inode), - count, - (unsigned long long)data->args.offset); - - task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) { - ret = PTR_ERR(task); - goto out; - } - if (how & FLUSH_SYNC) { - ret = rpc_wait_for_completion_task(task); - if (ret == 0) - ret = task->tk_status; - } - rpc_put_task(task); -out: - return ret; + nfs4_state_protect_write(NFS_SERVER(inode)->nfs_client, + &task_setup_data->rpc_client, msg, data); } /* If a nfs_flush_* function fails, it should remove reqs from @head and @@ -867,280 +1260,109 @@ out: */ static void nfs_redirty_request(struct nfs_page *req) { - struct page *page = req->wb_page; - nfs_mark_request_dirty(req); - nfs_clear_page_tag_locked(req); - nfs_end_page_writeback(page); -} - -/* - * Generate multiple small requests to write out a single - * contiguous dirty area on one page. - */ -static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how) -{ - struct nfs_page *req = nfs_list_entry(head->next); - struct page *page = req->wb_page; - struct nfs_write_data *data; - size_t wsize = NFS_SERVER(inode)->wsize, nbytes; - unsigned int offset; - int requests = 0; - int ret = 0; - LIST_HEAD(list); - - nfs_list_remove_request(req); - - nbytes = count; - do { - size_t len = min(nbytes, wsize); - - data = nfs_writedata_alloc(1); - if (!data) - goto out_bad; - list_add(&data->pages, &list); - requests++; - nbytes -= len; - } while (nbytes != 0); - atomic_set(&req->wb_complete, requests); - - ClearPageError(page); - offset = 0; - nbytes = count; - do { - int ret2; - - data = list_entry(list.next, struct nfs_write_data, pages); - list_del_init(&data->pages); - - data->pagevec[0] = page; - - if (nbytes < wsize) - wsize = nbytes; - ret2 = nfs_write_rpcsetup(req, data, &nfs_write_partial_ops, - wsize, offset, how); - if (ret == 0) - ret = ret2; - offset += wsize; - nbytes -= wsize; - } while (nbytes != 0); - - return ret; - -out_bad: - while (!list_empty(&list)) { - data = list_entry(list.next, struct nfs_write_data, pages); - list_del(&data->pages); - nfs_writedata_release(data); - } - nfs_redirty_request(req); - return -ENOMEM; + nfs_unlock_request(req); + nfs_end_page_writeback(req); + nfs_release_request(req); } -/* - * Create an RPC task for the given write request and kick it. - * The page must have been locked by the caller. - * - * It may happen that the page we're passed is not marked dirty. - * This is the case if nfs_updatepage detects a conflicting request - * that has been written but not committed. - */ -static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how) +static void nfs_async_write_error(struct list_head *head) { - struct nfs_page *req; - struct page **pages; - struct nfs_write_data *data; - - data = nfs_writedata_alloc(npages); - if (!data) - goto out_bad; - - pages = data->pagevec; - while (!list_empty(head)) { - req = nfs_list_entry(head->next); - nfs_list_remove_request(req); - nfs_list_add_request(req, &data->pages); - ClearPageError(req->wb_page); - *pages++ = req->wb_page; - } - req = nfs_list_entry(data->pages.next); + struct nfs_page *req; - /* Set up the argument struct */ - return nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how); - out_bad: while (!list_empty(head)) { req = nfs_list_entry(head->next); nfs_list_remove_request(req); nfs_redirty_request(req); } - return -ENOMEM; } -static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, - struct inode *inode, int ioflags) -{ - size_t wsize = NFS_SERVER(inode)->wsize; - - if (wsize < PAGE_CACHE_SIZE) - nfs_pageio_init(pgio, inode, nfs_flush_multi, wsize, ioflags); - else - nfs_pageio_init(pgio, inode, nfs_flush_one, wsize, ioflags); -} +static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = { + .error_cleanup = nfs_async_write_error, + .completion = nfs_write_completion, +}; -/* - * Handle a write reply that flushed part of a page. - */ -static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata) +void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, + struct inode *inode, int ioflags, bool force_mds, + const struct nfs_pgio_completion_ops *compl_ops) { - struct nfs_write_data *data = calldata; - - dprintk("NFS: %5u write(%s/%lld %d@%lld)", - task->tk_pid, - data->req->wb_context->path.dentry->d_inode->i_sb->s_id, - (long long) - NFS_FILEID(data->req->wb_context->path.dentry->d_inode), - data->req->wb_bytes, (long long)req_offset(data->req)); + struct nfs_server *server = NFS_SERVER(inode); + const struct nfs_pageio_ops *pg_ops = &nfs_pgio_rw_ops; - nfs_writeback_done(task, data); +#ifdef CONFIG_NFS_V4_1 + if (server->pnfs_curr_ld && !force_mds) + pg_ops = server->pnfs_curr_ld->pg_write_ops; +#endif + nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_write_ops, + server->wsize, ioflags); } +EXPORT_SYMBOL_GPL(nfs_pageio_init_write); -static void nfs_writeback_release_partial(void *calldata) +void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio) { - struct nfs_write_data *data = calldata; - struct nfs_page *req = data->req; - struct page *page = req->wb_page; - int status = data->task.tk_status; - - if (status < 0) { - nfs_set_pageerror(page); - nfs_context_set_write_error(req->wb_context, status); - dprintk(", error = %d\n", status); - goto out; - } + pgio->pg_ops = &nfs_pgio_rw_ops; + pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize; +} +EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds); - if (nfs_write_need_commit(data)) { - struct inode *inode = page->mapping->host; - spin_lock(&inode->i_lock); - if (test_bit(PG_NEED_RESCHED, &req->wb_flags)) { - /* Do nothing we need to resend the writes */ - } else if (!test_and_set_bit(PG_NEED_COMMIT, &req->wb_flags)) { - memcpy(&req->wb_verf, &data->verf, sizeof(req->wb_verf)); - dprintk(" defer commit\n"); - } else if (memcmp(&req->wb_verf, &data->verf, sizeof(req->wb_verf))) { - set_bit(PG_NEED_RESCHED, &req->wb_flags); - clear_bit(PG_NEED_COMMIT, &req->wb_flags); - dprintk(" server reboot detected\n"); - } - spin_unlock(&inode->i_lock); - } else - dprintk(" OK\n"); +void nfs_commit_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs_commit_data *data = calldata; -out: - if (atomic_dec_and_test(&req->wb_complete)) - nfs_writepage_release(req); - nfs_writedata_release(calldata); + NFS_PROTO(data->inode)->commit_rpc_prepare(task, data); } -#if defined(CONFIG_NFS_V4_1) -void nfs_write_prepare(struct rpc_task *task, void *calldata) +static void nfs_writeback_release_common(struct nfs_pgio_data *data) { - struct nfs_write_data *data = calldata; + struct nfs_pgio_header *hdr = data->header; + int status = data->task.tk_status; - if (nfs4_setup_sequence(NFS_SERVER(data->inode), - &data->args.seq_args, - &data->res.seq_res, 1, task)) - return; - rpc_call_start(task); + if ((status >= 0) && nfs_write_need_commit(data)) { + spin_lock(&hdr->lock); + if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) + ; /* Do nothing */ + else if (!test_and_set_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) + memcpy(&hdr->verf, &data->verf, sizeof(hdr->verf)); + else if (memcmp(&hdr->verf, &data->verf, sizeof(hdr->verf))) + set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags); + spin_unlock(&hdr->lock); + } } -#endif /* CONFIG_NFS_V4_1 */ - -static const struct rpc_call_ops nfs_write_partial_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_write_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_writeback_done_partial, - .rpc_release = nfs_writeback_release_partial, -}; /* - * Handle a write reply that flushes a whole page. - * - * FIXME: There is an inherent race with invalidate_inode_pages and - * writebacks since the page->count is kept > 1 for as long - * as the page has a write request pending. + * Special version of should_remove_suid() that ignores capabilities. */ -static void nfs_writeback_done_full(struct rpc_task *task, void *calldata) -{ - struct nfs_write_data *data = calldata; - - nfs_writeback_done(task, data); -} - -static void nfs_writeback_release_full(void *calldata) +static int nfs_should_remove_suid(const struct inode *inode) { - struct nfs_write_data *data = calldata; - int status = data->task.tk_status; - - /* Update attributes as result of writeback. */ - while (!list_empty(&data->pages)) { - struct nfs_page *req = nfs_list_entry(data->pages.next); - struct page *page = req->wb_page; + umode_t mode = inode->i_mode; + int kill = 0; - nfs_list_remove_request(req); + /* suid always must be killed */ + if (unlikely(mode & S_ISUID)) + kill = ATTR_KILL_SUID; - dprintk("NFS: %5u write (%s/%lld %d@%lld)", - data->task.tk_pid, - req->wb_context->path.dentry->d_inode->i_sb->s_id, - (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode), - req->wb_bytes, - (long long)req_offset(req)); + /* + * sgid without any exec bits is just a mandatory locking mark; leave + * it alone. If some exec bits are set, it's a real sgid; kill it. + */ + if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) + kill |= ATTR_KILL_SGID; - if (status < 0) { - nfs_set_pageerror(page); - nfs_context_set_write_error(req->wb_context, status); - dprintk(", error = %d\n", status); - goto remove_request; - } + if (unlikely(kill && S_ISREG(mode))) + return kill; - if (nfs_write_need_commit(data)) { - memcpy(&req->wb_verf, &data->verf, sizeof(req->wb_verf)); - nfs_mark_request_commit(req); - dprintk(" marked for commit\n"); - goto next; - } - dprintk(" OK\n"); -remove_request: - nfs_inode_remove_request(req); - next: - nfs_clear_page_tag_locked(req); - nfs_end_page_writeback(page); - } - nfs_writedata_release(calldata); + return 0; } -static const struct rpc_call_ops nfs_write_full_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_write_prepare, -#endif /* CONFIG_NFS_V4_1 */ - .rpc_call_done = nfs_writeback_done_full, - .rpc_release = nfs_writeback_release_full, -}; - - /* * This function is called when the WRITE call is complete. */ -int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) +static int nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data, + struct inode *inode) { - struct nfs_writeargs *argp = &data->args; - struct nfs_writeres *resp = &data->res; - struct nfs_server *server = NFS_SERVER(data->inode); int status; - dprintk("NFS: %5u nfs_writeback_done (status %d)\n", - task->tk_pid, task->tk_status); - /* * ->write_done will attempt to use post-op attributes to detect * conflicting writes by other clients. A strict interpretation @@ -1148,13 +1370,13 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) * another writer had changed the file, but some applications * depend on tighter cache coherency when writing. */ - status = NFS_PROTO(data->inode)->write_done(task, data); + status = NFS_PROTO(inode)->write_done(task, data); if (status != 0) return status; - nfs_add_stats(data->inode, NFSIOS_SERVERWRITTENBYTES, resp->count); + nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, data->res.count); -#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) - if (resp->verf->committed < argp->stable && task->tk_status >= 0) { +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) + if (data->res.verf->committed < data->args.stable && task->tk_status >= 0) { /* We tried a write call, but the server did not * commit data to stable storage even though we * requested it. @@ -1165,105 +1387,146 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data) */ static unsigned long complain; + /* Note this will print the MDS for a DS write */ if (time_before(complain, jiffies)) { dprintk("NFS: faulty NFS server %s:" " (committed = %d) != (stable = %d)\n", - server->nfs_client->cl_hostname, - resp->verf->committed, argp->stable); + NFS_SERVER(inode)->nfs_client->cl_hostname, + data->res.verf->committed, data->args.stable); complain = jiffies + 300 * HZ; } } #endif - /* Is this a short write? */ - if (task->tk_status >= 0 && resp->count < argp->count) { + + /* Deal with the suid/sgid bit corner case */ + if (nfs_should_remove_suid(inode)) + nfs_mark_for_revalidate(inode); + return 0; +} + +/* + * This function is called when the WRITE call is complete. + */ +static void nfs_writeback_result(struct rpc_task *task, struct nfs_pgio_data *data) +{ + struct nfs_pgio_args *argp = &data->args; + struct nfs_pgio_res *resp = &data->res; + + if (resp->count < argp->count) { static unsigned long complain; - nfs_inc_stats(data->inode, NFSIOS_SHORTWRITE); + /* This a short write! */ + nfs_inc_stats(data->header->inode, NFSIOS_SHORTWRITE); /* Has the server at least made some progress? */ - if (resp->count != 0) { - /* Was this an NFSv2 write or an NFSv3 stable write? */ - if (resp->verf->committed != NFS_UNSTABLE) { - /* Resend from where the server left off */ - argp->offset += resp->count; - argp->pgbase += resp->count; - argp->count -= resp->count; - } else { - /* Resend as a stable write in order to avoid - * headaches in the case of a server crash. - */ - argp->stable = NFS_FILE_SYNC; + if (resp->count == 0) { + if (time_before(complain, jiffies)) { + printk(KERN_WARNING + "NFS: Server wrote zero bytes, expected %u.\n", + argp->count); + complain = jiffies + 300 * HZ; } - nfs_restart_rpc(task, server->nfs_client); - return -EAGAIN; + nfs_set_pgio_error(data->header, -EIO, argp->offset); + task->tk_status = -EIO; + return; } - if (time_before(complain, jiffies)) { - printk(KERN_WARNING - "NFS: Server wrote zero bytes, expected %u.\n", - argp->count); - complain = jiffies + 300 * HZ; + /* Was this an NFSv2 write or an NFSv3 stable write? */ + if (resp->verf->committed != NFS_UNSTABLE) { + /* Resend from where the server left off */ + data->mds_offset += resp->count; + argp->offset += resp->count; + argp->pgbase += resp->count; + argp->count -= resp->count; + } else { + /* Resend as a stable write in order to avoid + * headaches in the case of a server crash. + */ + argp->stable = NFS_FILE_SYNC; } - /* Can't do anything about it except throw an error. */ - task->tk_status = -EIO; + rpc_restart_call_prepare(task); } - return 0; } -#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4) +#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4) static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait) { + int ret; + if (!test_and_set_bit(NFS_INO_COMMIT, &nfsi->flags)) return 1; - if (may_wait && !out_of_line_wait_on_bit_lock(&nfsi->flags, - NFS_INO_COMMIT, nfs_wait_bit_killable, - TASK_KILLABLE)) - return 1; - return 0; + if (!may_wait) + return 0; + ret = out_of_line_wait_on_bit_lock(&nfsi->flags, + NFS_INO_COMMIT, + nfs_wait_bit_killable, + TASK_KILLABLE); + return (ret < 0) ? ret : 1; } static void nfs_commit_clear_lock(struct nfs_inode *nfsi) { clear_bit(NFS_INO_COMMIT, &nfsi->flags); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); wake_up_bit(&nfsi->flags, NFS_INO_COMMIT); } - -static void nfs_commitdata_release(void *data) +void nfs_commitdata_release(struct nfs_commit_data *data) { - struct nfs_write_data *wdata = data; - - put_nfs_open_context(wdata->args.context); - nfs_commit_free(wdata); + put_nfs_open_context(data->context); + nfs_commit_free(data); } +EXPORT_SYMBOL_GPL(nfs_commitdata_release); -/* - * Set up the argument/result storage required for the RPC call. - */ -static int nfs_commit_rpcsetup(struct list_head *head, - struct nfs_write_data *data, - int how) +int nfs_initiate_commit(struct rpc_clnt *clnt, struct nfs_commit_data *data, + const struct rpc_call_ops *call_ops, + int how, int flags) { - struct nfs_page *first = nfs_list_entry(head->next); - struct inode *inode = first->wb_context->path.dentry->d_inode; - int priority = flush_task_priority(how); struct rpc_task *task; + int priority = flush_task_priority(how); struct rpc_message msg = { .rpc_argp = &data->args, .rpc_resp = &data->res, - .rpc_cred = first->wb_context->cred, + .rpc_cred = data->cred, }; struct rpc_task_setup task_setup_data = { .task = &data->task, - .rpc_client = NFS_CLIENT(inode), + .rpc_client = clnt, .rpc_message = &msg, - .callback_ops = &nfs_commit_ops, + .callback_ops = call_ops, .callback_data = data, .workqueue = nfsiod_workqueue, - .flags = RPC_TASK_ASYNC, + .flags = RPC_TASK_ASYNC | flags, .priority = priority, }; + /* Set up the initial task struct. */ + NFS_PROTO(data->inode)->commit_setup(data, &msg); + + dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid); + + nfs4_state_protect(NFS_SERVER(data->inode)->nfs_client, + NFS_SP4_MACH_CRED_COMMIT, &task_setup_data.rpc_client, &msg); + + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) + return PTR_ERR(task); + if (how & FLUSH_SYNC) + rpc_wait_for_completion_task(task); + rpc_put_task(task); + return 0; +} +EXPORT_SYMBOL_GPL(nfs_initiate_commit); + +/* + * Set up the argument/result storage required for the RPC call. + */ +void nfs_init_commit(struct nfs_commit_data *data, + struct list_head *head, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + struct nfs_page *first = nfs_list_entry(head->next); + struct inode *inode = first->wb_context->dentry->d_inode; /* Set up the RPC argument and reply structs * NB: take care not to mess about with data->commit et al. */ @@ -1271,38 +1534,51 @@ static int nfs_commit_rpcsetup(struct list_head *head, list_splice_init(head, &data->pages); data->inode = inode; - data->cred = msg.rpc_cred; + data->cred = first->wb_context->cred; + data->lseg = lseg; /* reference transferred */ + data->mds_ops = &nfs_commit_ops; + data->completion_ops = cinfo->completion_ops; + data->dreq = cinfo->dreq; data->args.fh = NFS_FH(data->inode); /* Note: we always request a commit of the entire inode */ data->args.offset = 0; data->args.count = 0; - data->args.context = get_nfs_open_context(first->wb_context); - data->res.count = 0; + data->context = get_nfs_open_context(first->wb_context); data->res.fattr = &data->fattr; data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); +} +EXPORT_SYMBOL_GPL(nfs_init_commit); - /* Set up the initial task struct. */ - NFS_PROTO(inode)->commit_setup(data, &msg); - - dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid); +void nfs_retry_commit(struct list_head *page_list, + struct pnfs_layout_segment *lseg, + struct nfs_commit_info *cinfo) +{ + struct nfs_page *req; - task = rpc_run_task(&task_setup_data); - if (IS_ERR(task)) - return PTR_ERR(task); - rpc_put_task(task); - return 0; + while (!list_empty(page_list)) { + req = nfs_list_entry(page_list->next); + nfs_list_remove_request(req); + nfs_mark_request_commit(req, lseg, cinfo); + if (!cinfo->dreq) { + dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); + dec_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info, + BDI_RECLAIMABLE); + } + nfs_unlock_and_release_request(req); + } } +EXPORT_SYMBOL_GPL(nfs_retry_commit); /* * Commit dirty pages */ static int -nfs_commit_list(struct inode *inode, struct list_head *head, int how) +nfs_commit_list(struct inode *inode, struct list_head *head, int how, + struct nfs_commit_info *cinfo) { - struct nfs_write_data *data; - struct nfs_page *req; + struct nfs_commit_data *data; data = nfs_commitdata_alloc(); @@ -1310,18 +1586,13 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how) goto out_bad; /* Set up the argument struct */ - return nfs_commit_rpcsetup(head, data, how); + nfs_init_commit(data, head, NULL, cinfo); + atomic_inc(&cinfo->mds->rpcs_out); + return nfs_initiate_commit(NFS_CLIENT(inode), data, data->mds_ops, + how, 0); out_bad: - while (!list_empty(head)) { - req = nfs_list_entry(head->next); - nfs_list_remove_request(req); - nfs_mark_request_commit(req); - dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS); - dec_bdi_stat(req->wb_page->mapping->backing_dev_info, - BDI_RECLAIMABLE); - nfs_clear_page_tag_locked(req); - } - nfs_commit_clear_lock(NFS_I(inode)); + nfs_retry_commit(head, NULL, cinfo); + cinfo->completion_ops->error_cleanup(NFS_I(inode)); return -ENOMEM; } @@ -1330,30 +1601,29 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how) */ static void nfs_commit_done(struct rpc_task *task, void *calldata) { - struct nfs_write_data *data = calldata; + struct nfs_commit_data *data = calldata; dprintk("NFS: %5u nfs_commit_done (status %d)\n", task->tk_pid, task->tk_status); /* Call the NFS version-specific code */ - if (NFS_PROTO(data->inode)->commit_done(task, data) != 0) - return; + NFS_PROTO(data->inode)->commit_done(task, data); } -static void nfs_commit_release(void *calldata) +static void nfs_commit_release_pages(struct nfs_commit_data *data) { - struct nfs_write_data *data = calldata; - struct nfs_page *req; + struct nfs_page *req; int status = data->task.tk_status; + struct nfs_commit_info cinfo; while (!list_empty(&data->pages)) { req = nfs_list_entry(data->pages.next); nfs_list_remove_request(req); - nfs_clear_request_commit(req); + nfs_clear_page_commit(req->wb_page); - dprintk("NFS: commit (%s/%lld %d@%lld)", - req->wb_context->path.dentry->d_inode->i_sb->s_id, - (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode), + dprintk("NFS: commit (%s/%llu %d@%lld)", + req->wb_context->dentry->d_sb->s_id, + (unsigned long long)NFS_FILEID(req->wb_context->dentry->d_inode), req->wb_bytes, (long long)req_offset(req)); if (status < 0) { @@ -1365,7 +1635,7 @@ static void nfs_commit_release(void *calldata) /* Okay, COMMIT succeeded, apparently. Check the verifier * returned by the server against all stored verfs. */ - if (!memcmp(req->wb_verf.verifier, data->verf.verifier, sizeof(data->verf.verifier))) { + if (!memcmp(&req->wb_verf, &data->verf.verifier, sizeof(req->wb_verf))) { /* We have a match */ nfs_inode_remove_request(req); dprintk(" OK\n"); @@ -1374,42 +1644,71 @@ static void nfs_commit_release(void *calldata) /* We have a mismatch. Write the page again */ dprintk(" mismatch\n"); nfs_mark_request_dirty(req); + set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags); next: - nfs_clear_page_tag_locked(req); + nfs_unlock_and_release_request(req); } - nfs_commit_clear_lock(NFS_I(data->inode)); + nfs_init_cinfo(&cinfo, data->inode, data->dreq); + if (atomic_dec_and_test(&cinfo.mds->rpcs_out)) + nfs_commit_clear_lock(NFS_I(data->inode)); +} + +static void nfs_commit_release(void *calldata) +{ + struct nfs_commit_data *data = calldata; + + data->completion_ops->completion(data); nfs_commitdata_release(calldata); } static const struct rpc_call_ops nfs_commit_ops = { -#if defined(CONFIG_NFS_V4_1) - .rpc_call_prepare = nfs_write_prepare, -#endif /* CONFIG_NFS_V4_1 */ + .rpc_call_prepare = nfs_commit_prepare, .rpc_call_done = nfs_commit_done, .rpc_release = nfs_commit_release, }; +static const struct nfs_commit_completion_ops nfs_commit_completion_ops = { + .completion = nfs_commit_release_pages, + .error_cleanup = nfs_commit_clear_lock, +}; + +int nfs_generic_commit_list(struct inode *inode, struct list_head *head, + int how, struct nfs_commit_info *cinfo) +{ + int status; + + status = pnfs_commit_list(inode, head, how, cinfo); + if (status == PNFS_NOT_ATTEMPTED) + status = nfs_commit_list(inode, head, how, cinfo); + return status; +} + int nfs_commit_inode(struct inode *inode, int how) { LIST_HEAD(head); + struct nfs_commit_info cinfo; int may_wait = how & FLUSH_SYNC; - int res = 0; + int res; - if (!nfs_commit_set_lock(NFS_I(inode), may_wait)) + res = nfs_commit_set_lock(NFS_I(inode), may_wait); + if (res <= 0) goto out_mark_dirty; - spin_lock(&inode->i_lock); - res = nfs_scan_commit(inode, &head, 0, 0); - spin_unlock(&inode->i_lock); + nfs_init_cinfo_from_inode(&cinfo, inode); + res = nfs_scan_commit(inode, &head, &cinfo); if (res) { - int error = nfs_commit_list(inode, &head, how); + int error; + + error = nfs_generic_commit_list(inode, &head, how, &cinfo); if (error < 0) return error; - if (may_wait) - wait_on_bit(&NFS_I(inode)->flags, NFS_INO_COMMIT, - nfs_wait_bit_killable, - TASK_KILLABLE); - else + if (!may_wait) goto out_mark_dirty; + error = wait_on_bit(&NFS_I(inode)->flags, + NFS_INO_COMMIT, + nfs_wait_bit_killable, + TASK_KILLABLE); + if (error < 0) + return error; } else nfs_commit_clear_lock(NFS_I(inode)); return res; @@ -1429,11 +1728,15 @@ static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_contr int flags = FLUSH_SYNC; int ret = 0; + /* no commits means nothing needs to be done */ + if (!nfsi->commit_info.ncommit) + return ret; + if (wbc->sync_mode == WB_SYNC_NONE) { /* Don't commit yet if this is a non-blocking flush and there * are a lot of outstanding writes for this mapping. */ - if (nfsi->ncommit <= (nfsi->npages >> 1)) + if (nfsi->commit_info.ncommit <= (nfsi->npages >> 1)) goto out_mark_dirty; /* don't wait for the COMMIT response */ @@ -1465,6 +1768,7 @@ int nfs_write_inode(struct inode *inode, struct writeback_control *wbc) { return nfs_commit_unstable_pages(inode, wbc); } +EXPORT_SYMBOL_GPL(nfs_write_inode); /* * flush the inode to disk. @@ -1477,36 +1781,44 @@ int nfs_wb_all(struct inode *inode) .range_start = 0, .range_end = LLONG_MAX, }; + int ret; + + trace_nfs_writeback_inode_enter(inode); + + ret = sync_inode(inode, &wbc); - return sync_inode(inode, &wbc); + trace_nfs_writeback_inode_exit(inode, ret); + return ret; } +EXPORT_SYMBOL_GPL(nfs_wb_all); int nfs_wb_page_cancel(struct inode *inode, struct page *page) { struct nfs_page *req; int ret = 0; - BUG_ON(!PageLocked(page)); - for (;;) { - wait_on_page_writeback(page); - req = nfs_page_find_request(page); - if (req == NULL) - break; - if (nfs_lock_request_dontget(req)) { - nfs_inode_remove_request(req); - /* - * In case nfs_inode_remove_request has marked the - * page as being dirty - */ - cancel_dirty_page(page, PAGE_CACHE_SIZE); - nfs_unlock_request(req); - break; - } - ret = nfs_wait_on_request(req); - nfs_release_request(req); - if (ret < 0) - break; + wait_on_page_writeback(page); + + /* blocking call to cancel all requests and join to a single (head) + * request */ + req = nfs_lock_and_join_requests(page, false); + + if (IS_ERR(req)) { + ret = PTR_ERR(req); + } else if (req) { + /* all requests from this page have been cancelled by + * nfs_lock_and_join_requests, so just remove the head + * request from the inode / page_private pointer and + * release it */ + nfs_inode_remove_request(req); + /* + * In case nfs_inode_remove_request has marked the + * page as being dirty + */ + cancel_dirty_page(page, PAGE_CACHE_SIZE); + nfs_unlock_and_release_request(req); } + return ret; } @@ -1515,7 +1827,7 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page) */ int nfs_wb_page(struct inode *inode, struct page *page) { - loff_t range_start = page_offset(page); + loff_t range_start = page_file_offset(page); loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1); struct writeback_control wbc = { .sync_mode = WB_SYNC_ALL, @@ -1525,6 +1837,8 @@ int nfs_wb_page(struct inode *inode, struct page *page) }; int ret; + trace_nfs_writeback_page_enter(inode); + for (;;) { wait_on_page_writeback(page); if (clear_page_dirty_for_io(page)) { @@ -1533,56 +1847,44 @@ int nfs_wb_page(struct inode *inode, struct page *page) goto out_error; continue; } + ret = 0; if (!PagePrivate(page)) break; ret = nfs_commit_inode(inode, FLUSH_SYNC); if (ret < 0) goto out_error; } - return 0; out_error: + trace_nfs_writeback_page_exit(inode, ret); return ret; } #ifdef CONFIG_MIGRATION int nfs_migrate_page(struct address_space *mapping, struct page *newpage, - struct page *page) + struct page *page, enum migrate_mode mode) { - struct nfs_page *req; - int ret; - - nfs_fscache_release_page(page, GFP_KERNEL); + /* + * If PagePrivate is set, then the page is currently associated with + * an in-progress read or write request. Don't try to migrate it. + * + * FIXME: we could do this in principle, but we'll need a way to ensure + * that we can safely release the inode reference while holding + * the page lock. + */ + if (PagePrivate(page)) + return -EBUSY; - req = nfs_find_and_lock_request(page, false); - ret = PTR_ERR(req); - if (IS_ERR(req)) - goto out; + if (!nfs_fscache_release_page(page, GFP_KERNEL)) + return -EBUSY; - ret = migrate_page(mapping, newpage, page); - if (!req) - goto out; - if (ret) - goto out_unlock; - page_cache_get(newpage); - spin_lock(&mapping->host->i_lock); - req->wb_page = newpage; - SetPagePrivate(newpage); - set_page_private(newpage, (unsigned long)req); - ClearPagePrivate(page); - set_page_private(page, 0); - spin_unlock(&mapping->host->i_lock); - page_cache_release(page); -out_unlock: - nfs_clear_page_tag_locked(req); -out: - return ret; + return migrate_page(mapping, newpage, page, mode); } #endif int __init nfs_init_writepagecache(void) { nfs_wdata_cachep = kmem_cache_create("nfs_write_data", - sizeof(struct nfs_write_data), + sizeof(struct nfs_rw_header), 0, SLAB_HWCACHE_ALIGN, NULL); if (nfs_wdata_cachep == NULL) @@ -1591,12 +1893,19 @@ int __init nfs_init_writepagecache(void) nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE, nfs_wdata_cachep); if (nfs_wdata_mempool == NULL) - return -ENOMEM; + goto out_destroy_write_cache; + + nfs_cdata_cachep = kmem_cache_create("nfs_commit_data", + sizeof(struct nfs_commit_data), + 0, SLAB_HWCACHE_ALIGN, + NULL); + if (nfs_cdata_cachep == NULL) + goto out_destroy_write_mempool; nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT, - nfs_wdata_cachep); + nfs_cdata_cachep); if (nfs_commit_mempool == NULL) - return -ENOMEM; + goto out_destroy_commit_cache; /* * NFS congestion size, scale with available memory. @@ -1619,12 +1928,30 @@ int __init nfs_init_writepagecache(void) nfs_congestion_kb = 256*1024; return 0; + +out_destroy_commit_cache: + kmem_cache_destroy(nfs_cdata_cachep); +out_destroy_write_mempool: + mempool_destroy(nfs_wdata_mempool); +out_destroy_write_cache: + kmem_cache_destroy(nfs_wdata_cachep); + return -ENOMEM; } void nfs_destroy_writepagecache(void) { mempool_destroy(nfs_commit_mempool); + kmem_cache_destroy(nfs_cdata_cachep); mempool_destroy(nfs_wdata_mempool); kmem_cache_destroy(nfs_wdata_cachep); } +static const struct nfs_rw_ops nfs_rw_write_ops = { + .rw_mode = FMODE_WRITE, + .rw_alloc_header = nfs_writehdr_alloc, + .rw_free_header = nfs_writehdr_free, + .rw_release = nfs_writeback_release_common, + .rw_done = nfs_writeback_done, + .rw_result = nfs_writeback_result, + .rw_initiate = nfs_initiate_write, +}; |