diff options
Diffstat (limited to 'fs')
105 files changed, 5730 insertions, 2172 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index 48f5422cb19..01a295232f7 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -810,7 +810,7 @@ config TMPFS config HUGETLBFS bool "HugeTLB file system support" - depends X86 || IA64 || PPC64 || SPARC64 || SUPERH || X86_64 || BROKEN + depends X86 || IA64 || PPC64 || SPARC64 || SUPERH || BROKEN config HUGETLB_PAGE def_bool HUGETLBFS diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt index 434c19d076a..175b2e8177c 100644 --- a/fs/Kconfig.binfmt +++ b/fs/Kconfig.binfmt @@ -57,7 +57,7 @@ config BINFMT_SHARED_FLAT config BINFMT_AOUT tristate "Kernel support for a.out and ECOFF binaries" - depends on (X86 && !X86_64) || ALPHA || ARM || M68K || SPARC32 + depends on X86_32 || ALPHA || ARM || M68K || SPARC32 ---help--- A.out (Assembler.OUTput) is a set of formats for libraries and executables used in the earliest versions of UNIX. Linux used diff --git a/fs/afs/file.c b/fs/afs/file.c index 23c12512802..4975c9c193d 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -29,7 +29,7 @@ static int afs_file_release(struct inode *inode, struct file *file); static int afs_file_readpage(struct file *file, struct page *page); static int afs_file_invalidatepage(struct page *page, unsigned long offset); -static int afs_file_releasepage(struct page *page, int gfp_flags); +static int afs_file_releasepage(struct page *page, gfp_t gfp_flags); static ssize_t afs_file_write(struct file *file, const char __user *buf, size_t size, loff_t *off); @@ -279,7 +279,7 @@ static int afs_file_invalidatepage(struct page *page, unsigned long offset) /* * release a page and cleanup its private data */ -static int afs_file_releasepage(struct page *page, int gfp_flags) +static int afs_file_releasepage(struct page *page, gfp_t gfp_flags) { struct cachefs_page *pageio; @@ -291,8 +291,8 @@ static int afs_file_releasepage(struct page *page, int gfp_flags) cachefs_uncache_page(vnode->cache, page); #endif - pageio = (struct cachefs_page *) page->private; - page->private = 0; + pageio = (struct cachefs_page *) page_private(page); + set_page_private(page, 0); ClearPagePrivate(page); if (pageio) @@ -1397,6 +1397,9 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb) if (unlikely(!access_ok(VERIFY_WRITE, kiocb->ki_buf, kiocb->ki_left))) break; + ret = security_file_permission(file, MAY_READ); + if (unlikely(ret)) + break; ret = -EINVAL; if (file->f_op->aio_read) kiocb->ki_retry = aio_pread; @@ -1409,6 +1412,9 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb) if (unlikely(!access_ok(VERIFY_READ, kiocb->ki_buf, kiocb->ki_left))) break; + ret = security_file_permission(file, MAY_WRITE); + if (unlikely(ret)) + break; ret = -EINVAL; if (file->f_op->aio_write) kiocb->ki_retry = aio_pwrite; diff --git a/fs/attr.c b/fs/attr.c index b1796fb9e52..67bcd9b14ea 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -117,9 +117,6 @@ int notify_change(struct dentry * dentry, struct iattr * attr) struct timespec now; unsigned int ia_valid = attr->ia_valid; - if (!inode) - BUG(); - mode = inode->i_mode; now = current_fs_time(inode->i_sb); diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c index dd9baabaf01..72011826f0c 100644 --- a/fs/binfmt_aout.c +++ b/fs/binfmt_aout.c @@ -318,7 +318,6 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs) current->mm->free_area_cache = current->mm->mmap_base; current->mm->cached_hole_size = 0; - set_mm_counter(current->mm, rss, 0); current->mm->mmap = NULL; compute_creds(bprm); current->flags &= ~PF_FORKNOEXEC; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index d4b15576e58..6fa6adc4097 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -773,7 +773,6 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) /* Do this so that we can load the interpreter, if need be. We will change some of these later */ - set_mm_counter(current->mm, rss, 0); current->mm->free_area_cache = current->mm->mmap_base; current->mm->cached_hole_size = 0; retval = setup_arg_pages(bprm, randomize_stack_top(STACK_TOP), @@ -1503,9 +1502,7 @@ static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file) fill_psinfo(psinfo, current->group_leader, current->mm); fill_note(notes +1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo); - fill_note(notes +2, "CORE", NT_TASKSTRUCT, sizeof(*current), current); - - numnote = 3; + numnote = 2; auxv = (elf_addr_t *) current->mm->saved_auxv; diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 134c9c0d1f5..dda87c4c82a 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -294,14 +294,7 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm, struct pt_regs *regs &interp_params, ¤t->mm->start_stack, ¤t->mm->start_brk); -#endif - - /* do this so that we can load the interpreter, if need be - * - we will change some of these later - */ - set_mm_counter(current->mm, rss, 0); -#ifdef CONFIG_MMU retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack); if (retval < 0) { send_sig(SIGKILL, current, 0); diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 7974efa107b..9d6625829b9 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -650,7 +650,6 @@ static int load_flat_file(struct linux_binprm * bprm, current->mm->start_brk = datapos + data_len + bss_len; current->mm->brk = (current->mm->start_brk + 3) & ~3; current->mm->context.end_brk = memp + ksize((void *) memp) - stack_len; - set_mm_counter(current->mm, rss, 0); } if (flags & FLAT_FLAG_KTRACE) diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index 227a2682d2b..00a91dc25d1 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -259,7 +259,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) create_som_tables(bprm); current->mm->start_stack = bprm->p; - set_mm_counter(current->mm, rss, 0); #if 0 printk("(start_brk) %08lx\n" , (unsigned long) current->mm->start_brk); @@ -778,7 +778,7 @@ static int bio_map_kern_endio(struct bio *bio, unsigned int bytes_done, int err) static struct bio *__bio_map_kern(request_queue_t *q, void *data, - unsigned int len, unsigned int gfp_mask) + unsigned int len, gfp_t gfp_mask) { unsigned long kaddr = (unsigned long)data; unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; @@ -825,7 +825,7 @@ static struct bio *__bio_map_kern(request_queue_t *q, void *data, * device. Returns an error pointer in case of error. */ struct bio *bio_map_kern(request_queue_t *q, void *data, unsigned int len, - unsigned int gfp_mask) + gfp_t gfp_mask) { struct bio *bio; diff --git a/fs/buffer.c b/fs/buffer.c index 1216c0d3c8c..35fa34977e8 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -96,7 +96,7 @@ static void __clear_page_buffers(struct page *page) { ClearPagePrivate(page); - page->private = 0; + set_page_private(page, 0); page_cache_release(page); } @@ -502,7 +502,7 @@ static void free_more_memory(void) yield(); for_each_pgdat(pgdat) { - zones = pgdat->node_zonelists[GFP_NOFS&GFP_ZONEMASK].zones; + zones = pgdat->node_zonelists[gfp_zone(GFP_NOFS)].zones; if (*zones) try_to_free_pages(zones, GFP_NOFS); } @@ -1478,8 +1478,10 @@ EXPORT_SYMBOL(__getblk); void __breadahead(struct block_device *bdev, sector_t block, int size) { struct buffer_head *bh = __getblk(bdev, block, size); - ll_rw_block(READA, 1, &bh); - brelse(bh); + if (likely(bh)) { + ll_rw_block(READA, 1, &bh); + brelse(bh); + } } EXPORT_SYMBOL(__breadahead); @@ -1497,7 +1499,7 @@ __bread(struct block_device *bdev, sector_t block, int size) { struct buffer_head *bh = __getblk(bdev, block, size); - if (!buffer_uptodate(bh)) + if (likely(bh) && !buffer_uptodate(bh)) bh = __bread_slow(bh); return bh; } @@ -1571,7 +1573,7 @@ static inline void discard_buffer(struct buffer_head * bh) * * NOTE: @gfp_mask may go away, and this function may become non-blocking. */ -int try_to_release_page(struct page *page, int gfp_mask) +int try_to_release_page(struct page *page, gfp_t gfp_mask) { struct address_space * const mapping = page->mapping; @@ -1637,6 +1639,15 @@ out: } EXPORT_SYMBOL(block_invalidatepage); +int do_invalidatepage(struct page *page, unsigned long offset) +{ + int (*invalidatepage)(struct page *, unsigned long); + invalidatepage = page->mapping->a_ops->invalidatepage; + if (invalidatepage == NULL) + invalidatepage = block_invalidatepage; + return (*invalidatepage)(page, offset); +} + /* * We attach and possibly dirty the buffers atomically wrt * __set_page_dirty_buffers() via private_lock. try_to_free_buffers @@ -2696,7 +2707,7 @@ int block_write_full_page(struct page *page, get_block_t *get_block, * they may have been added in ext3_writepage(). Make them * freeable here, so the page does not leak. */ - block_invalidatepage(page, 0); + do_invalidatepage(page, 0); unlock_page(page); return 0; /* don't care */ } diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c index 3d1cce3653b..6a3df88accf 100644 --- a/fs/coda/psdev.c +++ b/fs/coda/psdev.c @@ -370,8 +370,8 @@ static int init_coda_psdev(void) } devfs_mk_dir ("coda"); for (i = 0; i < MAX_CODADEVS; i++) { - class_device_create(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR,i), - NULL, "cfs%d", i); + class_device_create(coda_psdev_class, NULL, + MKDEV(CODA_PSDEV_MAJOR,i), NULL, "cfs%d", i); err = devfs_mk_cdev(MKDEV(CODA_PSDEV_MAJOR, i), S_IFCHR|S_IRUSR|S_IWUSR, "coda/%d", i); if (err) diff --git a/fs/compat.c b/fs/compat.c index a719e158e00..8e71cdbecc7 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1490,7 +1490,6 @@ int compat_do_execve(char * filename, /* execve success */ security_bprm_free(bprm); acct_update_integrals(current); - update_mem_hiwater(current); kfree(bprm); return retval; } diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index e28a74203f3..43dbcb0b21e 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -3046,10 +3046,15 @@ HANDLE_IOCTL(RAW_GETBIND, raw_ioctl) /* Serial */ HANDLE_IOCTL(TIOCGSERIAL, serial_struct_ioctl) HANDLE_IOCTL(TIOCSSERIAL, serial_struct_ioctl) +#ifdef TIOCGLTC +COMPATIBLE_IOCTL(TIOCGLTC) +COMPATIBLE_IOCTL(TIOCSLTC) +#endif /* Usbdevfs */ HANDLE_IOCTL(USBDEVFS_CONTROL32, do_usbdevfs_control) HANDLE_IOCTL(USBDEVFS_BULK32, do_usbdevfs_bulk) HANDLE_IOCTL(USBDEVFS_DISCSIGNAL32, do_usbdevfs_discsignal) +COMPATIBLE_IOCTL(USBDEVFS_IOCTL32) /* i2c */ HANDLE_IOCTL(I2C_FUNCS, w_long) HANDLE_IOCTL(I2C_RDWR, do_i2c_rdwr_ioctl) diff --git a/fs/dcache.c b/fs/dcache.c index fb10386c59b..e90512ed35a 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -689,7 +689,7 @@ void shrink_dcache_anon(struct hlist_head *head) * * In this case we return -1 to tell the caller that we baled. */ -static int shrink_dcache_memory(int nr, unsigned int gfp_mask) +static int shrink_dcache_memory(int nr, gfp_t gfp_mask) { if (nr) { if (!(gfp_mask & __GFP_FS)) diff --git a/fs/direct-io.c b/fs/direct-io.c index 0d06097bc99..3931e7f1e6b 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -162,6 +162,7 @@ static int dio_refill_pages(struct dio *dio) up_read(¤t->mm->mmap_sem); if (ret < 0 && dio->blocks_available && (dio->rw == WRITE)) { + struct page *page = ZERO_PAGE(dio->curr_user_address); /* * A memory fault, but the filesystem has some outstanding * mapped blocks. We need to use those blocks up to avoid @@ -169,7 +170,8 @@ static int dio_refill_pages(struct dio *dio) */ if (dio->page_errors == 0) dio->page_errors = ret; - dio->pages[0] = ZERO_PAGE(dio->curr_user_address); + page_cache_get(page); + dio->pages[0] = page; dio->head = 0; dio->tail = 1; ret = 0; diff --git a/fs/dquot.c b/fs/dquot.c index b9732335bcd..ea7644227a6 100644 --- a/fs/dquot.c +++ b/fs/dquot.c @@ -500,7 +500,7 @@ static void prune_dqcache(int count) * more memory */ -static int shrink_dqcache_memory(int nr, unsigned int gfp_mask) +static int shrink_dqcache_memory(int nr, gfp_t gfp_mask) { if (nr) { spin_lock(&dq_list_lock); @@ -662,7 +662,7 @@ static void add_dquot_ref(struct super_block *sb, int type) restart: file_list_lock(); list_for_each(p, &sb->s_files) { - struct file *filp = list_entry(p, struct file, f_list); + struct file *filp = list_entry(p, struct file, f_u.fu_list); struct inode *inode = filp->f_dentry->d_inode; if (filp->f_mode & FMODE_WRITE && dqinit_needed(inode, type)) { struct dentry *dentry = dget(filp->f_dentry); diff --git a/fs/exec.c b/fs/exec.c index a04a575ad43..10d493fea7c 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -126,8 +126,7 @@ asmlinkage long sys_uselib(const char __user * library) struct nameidata nd; int error; - nd.intent.open.flags = FMODE_READ; - error = __user_walk(library, LOOKUP_FOLLOW|LOOKUP_OPEN, &nd); + error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ); if (error) goto out; @@ -139,7 +138,7 @@ asmlinkage long sys_uselib(const char __user * library) if (error) goto exit; - file = dentry_open(nd.dentry, nd.mnt, O_RDONLY); + file = nameidata_to_filp(&nd, O_RDONLY); error = PTR_ERR(file); if (IS_ERR(file)) goto out; @@ -167,6 +166,7 @@ asmlinkage long sys_uselib(const char __user * library) out: return error; exit: + release_open_intent(&nd); path_release(&nd); goto out; } @@ -309,40 +309,36 @@ void install_arg_page(struct vm_area_struct *vma, pud_t * pud; pmd_t * pmd; pte_t * pte; + spinlock_t *ptl; if (unlikely(anon_vma_prepare(vma))) - goto out_sig; + goto out; flush_dcache_page(page); pgd = pgd_offset(mm, address); - - spin_lock(&mm->page_table_lock); pud = pud_alloc(mm, pgd, address); if (!pud) goto out; pmd = pmd_alloc(mm, pud, address); if (!pmd) goto out; - pte = pte_alloc_map(mm, pmd, address); + pte = pte_alloc_map_lock(mm, pmd, address, &ptl); if (!pte) goto out; if (!pte_none(*pte)) { - pte_unmap(pte); + pte_unmap_unlock(pte, ptl); goto out; } - inc_mm_counter(mm, rss); + inc_mm_counter(mm, anon_rss); lru_cache_add_active(page); set_pte_at(mm, address, pte, pte_mkdirty(pte_mkwrite(mk_pte( page, vma->vm_page_prot)))); page_add_anon_rmap(page, vma, address); - pte_unmap(pte); - spin_unlock(&mm->page_table_lock); + pte_unmap_unlock(pte, ptl); /* no need for flush_tlb */ return; out: - spin_unlock(&mm->page_table_lock); -out_sig: __free_page(page); force_sig(SIGKILL, current); } @@ -490,8 +486,7 @@ struct file *open_exec(const char *name) int err; struct file *file; - nd.intent.open.flags = FMODE_READ; - err = path_lookup(name, LOOKUP_FOLLOW|LOOKUP_OPEN, &nd); + err = path_lookup_open(name, LOOKUP_FOLLOW, &nd, FMODE_READ); file = ERR_PTR(err); if (!err) { @@ -504,7 +499,7 @@ struct file *open_exec(const char *name) err = -EACCES; file = ERR_PTR(err); if (!err) { - file = dentry_open(nd.dentry, nd.mnt, O_RDONLY); + file = nameidata_to_filp(&nd, O_RDONLY); if (!IS_ERR(file)) { err = deny_write_access(file); if (err) { @@ -516,6 +511,7 @@ out: return file; } } + release_open_intent(&nd); path_release(&nd); } goto out; @@ -634,10 +630,9 @@ static inline int de_thread(struct task_struct *tsk) /* * Account for the thread group leader hanging around: */ - count = 2; - if (thread_group_leader(current)) - count = 1; - else { + count = 1; + if (!thread_group_leader(current)) { + count = 2; /* * The SIGALRM timer survives the exec, but needs to point * at us as the new group leader now. We have a race with @@ -646,8 +641,10 @@ static inline int de_thread(struct task_struct *tsk) * before we can safely let the old group leader die. */ sig->real_timer.data = (unsigned long)current; + spin_unlock_irq(lock); if (del_timer_sync(&sig->real_timer)) add_timer(&sig->real_timer); + spin_lock_irq(lock); } while (atomic_read(&sig->count) > count) { sig->group_exit_task = current; @@ -659,7 +656,6 @@ static inline int de_thread(struct task_struct *tsk) } sig->group_exit_task = NULL; sig->notify_count = 0; - sig->real_timer.data = (unsigned long)current; spin_unlock_irq(lock); /* @@ -1207,7 +1203,6 @@ int do_execve(char * filename, /* execve success */ security_bprm_free(bprm); acct_update_integrals(current); - update_mem_hiwater(current); kfree(bprm); return retval; } @@ -1422,19 +1417,16 @@ static void zap_threads (struct mm_struct *mm) static void coredump_wait(struct mm_struct *mm) { DECLARE_COMPLETION(startup_done); + int core_waiters; - mm->core_waiters++; /* let other threads block */ mm->core_startup_done = &startup_done; - /* give other threads a chance to run: */ - yield(); - zap_threads(mm); - if (--mm->core_waiters) { - up_write(&mm->mmap_sem); + core_waiters = mm->core_waiters; + up_write(&mm->mmap_sem); + + if (core_waiters) wait_for_completion(&startup_done); - } else - up_write(&mm->mmap_sem); BUG_ON(mm->core_waiters); } @@ -1468,11 +1460,21 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs) current->fsuid = 0; /* Dump root private */ } mm->dumpable = 0; - init_completion(&mm->core_done); + + retval = -EAGAIN; spin_lock_irq(¤t->sighand->siglock); - current->signal->flags = SIGNAL_GROUP_EXIT; - current->signal->group_exit_code = exit_code; + if (!(current->signal->flags & SIGNAL_GROUP_EXIT)) { + current->signal->flags = SIGNAL_GROUP_EXIT; + current->signal->group_exit_code = exit_code; + retval = 0; + } spin_unlock_irq(¤t->sighand->siglock); + if (retval) { + up_write(&mm->mmap_sem); + goto fail; + } + + init_completion(&mm->core_done); coredump_wait(mm); /* diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index fdba4d1d3c6..e7d3f0522d0 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -440,6 +440,10 @@ static int ext2_alloc_branch(struct inode *inode, * the pointer to new one, then send parent to disk. */ bh = sb_getblk(inode->i_sb, parent); + if (!bh) { + err = -EIO; + break; + } lock_buffer(bh); memset(bh->b_data, 0, blocksize); branch[n].bh = bh; diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index 0213db4911a..7992d21e0e0 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -20,6 +20,8 @@ #include <linux/quotaops.h> #include <linux/buffer_head.h> +#include "bitmap.h" + /* * balloc.c contains the blocks allocation and deallocation routines */ @@ -1010,7 +1012,7 @@ retry: * allocation within the reservation window. * * This will avoid keeping on searching the reservation list again and - * again when someboday is looking for a free block (without + * again when somebody is looking for a free block (without * reservation), and there are lots of free blocks, but they are all * being reserved. * @@ -1416,12 +1418,12 @@ unsigned long ext3_count_free_blocks(struct super_block *sb) unsigned long bitmap_count, x; struct buffer_head *bitmap_bh = NULL; - lock_super(sb); es = EXT3_SB(sb)->s_es; desc_count = 0; bitmap_count = 0; gdp = NULL; + smp_rmb(); for (i = 0; i < ngroups; i++) { gdp = ext3_get_group_desc(sb, i, NULL); if (!gdp) @@ -1440,7 +1442,6 @@ unsigned long ext3_count_free_blocks(struct super_block *sb) brelse(bitmap_bh); printk("ext3_count_free_blocks: stored = %u, computed = %lu, %lu\n", le32_to_cpu(es->s_free_blocks_count), desc_count, bitmap_count); - unlock_super(sb); return bitmap_count; #else desc_count = 0; diff --git a/fs/ext3/bitmap.c b/fs/ext3/bitmap.c index 6c419b9ab0e..5b4ba3e246e 100644 --- a/fs/ext3/bitmap.c +++ b/fs/ext3/bitmap.c @@ -8,7 +8,7 @@ */ #include <linux/buffer_head.h> - +#include "bitmap.h" static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0}; diff --git a/fs/ext3/bitmap.h b/fs/ext3/bitmap.h new file mode 100644 index 00000000000..6ee503a6bb4 --- /dev/null +++ b/fs/ext3/bitmap.h @@ -0,0 +1,8 @@ +/* linux/fs/ext3/bitmap.c + * + * Copyright (C) 2005 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * +*/ + +extern unsigned long ext3_count_free (struct buffer_head *, unsigned int ); diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c index 6549945f9ac..df3f517c54a 100644 --- a/fs/ext3/ialloc.c +++ b/fs/ext3/ialloc.c @@ -26,6 +26,7 @@ #include <asm/byteorder.h> +#include "bitmap.h" #include "xattr.h" #include "acl.h" @@ -704,7 +705,6 @@ unsigned long ext3_count_free_inodes (struct super_block * sb) unsigned long bitmap_count, x; struct buffer_head *bitmap_bh = NULL; - lock_super (sb); es = EXT3_SB(sb)->s_es; desc_count = 0; bitmap_count = 0; @@ -727,7 +727,6 @@ unsigned long ext3_count_free_inodes (struct super_block * sb) brelse(bitmap_bh); printk("ext3_count_free_inodes: stored = %u, computed = %lu, %lu\n", le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count); - unlock_super(sb); return desc_count; #else desc_count = 0; diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index b5177c90d6f..5d9b00e2883 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -491,7 +491,7 @@ static unsigned long ext3_find_goal(struct inode *inode, long block, * the same format as ext3_get_branch() would do. We are calling it after * we had read the existing part of chain and partial points to the last * triple of that (one with zero ->key). Upon the exit we have the same - * picture as after the successful ext3_get_block(), excpet that in one + * picture as after the successful ext3_get_block(), except that in one * place chain is disconnected - *branch->p is still zero (we did not * set the last link), but branch->key contains the number that should * be placed into *branch->p to fill that gap. @@ -523,7 +523,6 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode, if (!nr) break; branch[n].key = cpu_to_le32(nr); - keys = n+1; /* * Get buffer_head for parent block, zero it out @@ -531,6 +530,9 @@ static int ext3_alloc_branch(handle_t *handle, struct inode *inode, * parent to disk. */ bh = sb_getblk(inode->i_sb, parent); + if (!bh) + break; + keys = n+1; branch[n].bh = bh; lock_buffer(bh); BUFFER_TRACE(bh, "call get_create_access"); @@ -864,6 +866,10 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode, if (!*errp && buffer_mapped(&dummy)) { struct buffer_head *bh; bh = sb_getblk(inode->i_sb, dummy.b_blocknr); + if (!bh) { + *errp = -EIO; + goto err; + } if (buffer_new(&dummy)) { J_ASSERT(create != 0); J_ASSERT(handle != 0); @@ -896,6 +902,7 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode * inode, } return bh; } +err: return NULL; } @@ -1434,7 +1441,7 @@ static int ext3_invalidatepage(struct page *page, unsigned long offset) return journal_invalidatepage(journal, page, offset); } -static int ext3_releasepage(struct page *page, int wait) +static int ext3_releasepage(struct page *page, gfp_t wait) { journal_t *journal = EXT3_JOURNAL(page->mapping->host); diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index 50378d8ff84..b3c690a3b54 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -36,6 +36,8 @@ #include <linux/quotaops.h> #include <linux/buffer_head.h> #include <linux/smp_lock.h> + +#include "namei.h" #include "xattr.h" #include "acl.h" diff --git a/fs/ext3/namei.h b/fs/ext3/namei.h new file mode 100644 index 00000000000..f2ce2b0065c --- /dev/null +++ b/fs/ext3/namei.h @@ -0,0 +1,8 @@ +/* linux/fs/ext3/namei.h + * + * Copyright (C) 2005 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * +*/ + +extern struct dentry *ext3_get_parent(struct dentry *child); diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c index 57f79106267..1be78b4b4de 100644 --- a/fs/ext3/resize.c +++ b/fs/ext3/resize.c @@ -118,6 +118,8 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb, int err; bh = sb_getblk(sb, blk); + if (!bh) + return ERR_PTR(-EIO); if ((err = ext3_journal_get_write_access(handle, bh))) { brelse(bh); bh = ERR_PTR(err); @@ -202,6 +204,10 @@ static int setup_new_group_blocks(struct super_block *sb, ext3_debug("update backup group %#04lx (+%d)\n", block, bit); gdb = sb_getblk(sb, block); + if (!gdb) { + err = -EIO; + goto exit_bh; + } if ((err = ext3_journal_get_write_access(handle, gdb))) { brelse(gdb); goto exit_bh; @@ -643,6 +649,10 @@ static void update_backups(struct super_block *sb, break; bh = sb_getblk(sb, group * bpg + blk_off); + if (!bh) { + err = -EIO; + break; + } ext3_debug("update metadata backup %#04lx\n", (unsigned long)bh->b_blocknr); if ((err = ext3_journal_get_write_access(handle, bh))) diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 9e24ceb019f..f594989ccb7 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -36,9 +36,12 @@ #include <linux/namei.h> #include <linux/quotaops.h> #include <linux/seq_file.h> + #include <asm/uaccess.h> + #include "xattr.h" #include "acl.h" +#include "namei.h" static int ext3_load_journal(struct super_block *, struct ext3_super_block *); static int ext3_create_journal(struct super_block *, struct ext3_super_block *, @@ -510,19 +513,11 @@ static void ext3_clear_inode(struct inode *inode) kfree(rsv); } -static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) +static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb) { - struct super_block *sb = vfs->mnt_sb; +#if defined(CONFIG_QUOTA) struct ext3_sb_info *sbi = EXT3_SB(sb); - if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) - seq_puts(seq, ",data=journal"); - else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) - seq_puts(seq, ",data=ordered"); - else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) - seq_puts(seq, ",data=writeback"); - -#if defined(CONFIG_QUOTA) if (sbi->s_jquota_fmt) seq_printf(seq, ",jqfmt=%s", (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); @@ -539,6 +534,20 @@ static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) seq_puts(seq, ",grpquota"); #endif +} + +static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs) +{ + struct super_block *sb = vfs->mnt_sb; + + if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) + seq_puts(seq, ",data=journal"); + else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) + seq_puts(seq, ",data=ordered"); + else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) + seq_puts(seq, ",data=writeback"); + + ext3_show_quota_options(seq, sb); return 0; } @@ -609,7 +618,6 @@ static struct super_operations ext3_sops = { #endif }; -struct dentry *ext3_get_parent(struct dentry *child); static struct export_operations ext3_export_ops = { .get_parent = ext3_get_parent, }; diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c index 269c7b92db9..430de9f63be 100644 --- a/fs/ext3/xattr.c +++ b/fs/ext3/xattr.c @@ -210,7 +210,7 @@ ext3_xattr_find_entry(struct ext3_xattr_entry **pentry, int name_index, return cmp ? -ENODATA : 0; } -int +static int ext3_xattr_block_get(struct inode *inode, int name_index, const char *name, void *buffer, size_t buffer_size) { @@ -354,7 +354,7 @@ ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry, return buffer_size - rest; } -int +static int ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size) { struct buffer_head *bh = NULL; @@ -626,7 +626,7 @@ struct ext3_xattr_block_find { struct buffer_head *bh; }; -int +static int ext3_xattr_block_find(struct inode *inode, struct ext3_xattr_info *i, struct ext3_xattr_block_find *bs) { @@ -859,7 +859,7 @@ struct ext3_xattr_ibody_find { struct ext3_iloc iloc; }; -int +static int ext3_xattr_ibody_find(struct inode *inode, struct ext3_xattr_info *i, struct ext3_xattr_ibody_find *is) { diff --git a/fs/fat/dir.c b/fs/fat/dir.c index 895049b2ac9..ba824964b9b 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -222,6 +222,80 @@ fat_shortname2uni(struct nls_table *nls, unsigned char *buf, int buf_size, return len; } +enum { PARSE_INVALID = 1, PARSE_NOT_LONGNAME, PARSE_EOF, }; + +/** + * fat_parse_long - Parse extended directory entry. + * + * This function returns zero on success, negative value on error, or one of + * the following: + * + * %PARSE_INVALID - Directory entry is invalid. + * %PARSE_NOT_LONGNAME - Directory entry does not contain longname. + * %PARSE_EOF - Directory has no more entries. + */ +static int fat_parse_long(struct inode *dir, loff_t *pos, + struct buffer_head **bh, struct msdos_dir_entry **de, + wchar_t **unicode, unsigned char *nr_slots) +{ + struct msdos_dir_slot *ds; + unsigned char id, slot, slots, alias_checksum; + + if (!*unicode) { + *unicode = (wchar_t *)__get_free_page(GFP_KERNEL); + if (!*unicode) { + brelse(*bh); + return -ENOMEM; + } + } +parse_long: + slots = 0; + ds = (struct msdos_dir_slot *)*de; + id = ds->id; + if (!(id & 0x40)) + return PARSE_INVALID; + slots = id & ~0x40; + if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */ + return PARSE_INVALID; + *nr_slots = slots; + alias_checksum = ds->alias_checksum; + + slot = slots; + while (1) { + int offset; + + slot--; + offset = slot * 13; + fat16_towchar(*unicode + offset, ds->name0_4, 5); + fat16_towchar(*unicode + offset + 5, ds->name5_10, 6); + fat16_towchar(*unicode + offset + 11, ds->name11_12, 2); + + if (ds->id & 0x40) + (*unicode)[offset + 13] = 0; + if (fat_get_entry(dir, pos, bh, de) < 0) + return PARSE_EOF; + if (slot == 0) + break; + ds = (struct msdos_dir_slot *)*de; + if (ds->attr != ATTR_EXT) + return PARSE_NOT_LONGNAME; + if ((ds->id & ~0x40) != slot) + goto parse_long; + if (ds->alias_checksum != alias_checksum) + goto parse_long; + } + if ((*de)->name[0] == DELETED_FLAG) + return PARSE_INVALID; + if ((*de)->attr == ATTR_EXT) + goto parse_long; + if (IS_FREE((*de)->name) || ((*de)->attr & ATTR_VOLUME)) + return PARSE_INVALID; + if (fat_checksum((*de)->name) != alias_checksum) + *nr_slots = 0; + + return 0; +} + /* * Return values: negative -> error, 0 -> not found, positive -> found, * value is the total amount of slots, including the shortname entry. @@ -259,68 +333,16 @@ parse_record: if (de->attr != ATTR_EXT && IS_FREE(de->name)) continue; if (de->attr == ATTR_EXT) { - struct msdos_dir_slot *ds; - unsigned char id; - unsigned char slot; - unsigned char slots; - unsigned char sum; - unsigned char alias_checksum; - - if (!unicode) { - unicode = (wchar_t *) - __get_free_page(GFP_KERNEL); - if (!unicode) { - brelse(bh); - return -ENOMEM; - } - } -parse_long: - slots = 0; - ds = (struct msdos_dir_slot *) de; - id = ds->id; - if (!(id & 0x40)) - continue; - slots = id & ~0x40; - if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */ - continue; - nr_slots = slots; - alias_checksum = ds->alias_checksum; - - slot = slots; - while (1) { - int offset; - - slot--; - offset = slot * 13; - fat16_towchar(unicode + offset, ds->name0_4, 5); - fat16_towchar(unicode + offset + 5, ds->name5_10, 6); - fat16_towchar(unicode + offset + 11, ds->name11_12, 2); - - if (ds->id & 0x40) { - unicode[offset + 13] = 0; - } - if (fat_get_entry(inode, &cpos, &bh, &de) < 0) - goto EODir; - if (slot == 0) - break; - ds = (struct msdos_dir_slot *) de; - if (ds->attr != ATTR_EXT) - goto parse_record; - if ((ds->id & ~0x40) != slot) - goto parse_long; - if (ds->alias_checksum != alias_checksum) - goto parse_long; - } - if (de->name[0] == DELETED_FLAG) - continue; - if (de->attr == ATTR_EXT) - goto parse_long; - if (IS_FREE(de->name) || (de->attr & ATTR_VOLUME)) + int status = fat_parse_long(inode, &cpos, &bh, &de, + &unicode, &nr_slots); + if (status < 0) + return status; + else if (status == PARSE_INVALID) continue; - for (sum = 0, i = 0; i < 11; i++) - sum = (((sum&1)<<7)|((sum&0xfe)>>1)) + de->name[i]; - if (sum != alias_checksum) - nr_slots = 0; + else if (status == PARSE_NOT_LONGNAME) + goto parse_record; + else if (status == PARSE_EOF) + goto EODir; } memcpy(work, de->name, sizeof(de->name)); @@ -408,8 +430,8 @@ struct fat_ioctl_filldir_callback { int short_len; }; -static int fat_readdirx(struct inode *inode, struct file *filp, void *dirent, - filldir_t filldir, int short_only, int both) +static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent, + filldir_t filldir, int short_only, int both) { struct super_block *sb = inode->i_sb; struct msdos_sb_info *sbi = MSDOS_SB(sb); @@ -458,9 +480,10 @@ static int fat_readdirx(struct inode *inode, struct file *filp, void *dirent, bh = NULL; GetNew: - long_slots = 0; if (fat_get_entry(inode, &cpos, &bh, &de) == -1) goto EODir; +parse_record: + long_slots = 0; /* Check for long filename entry */ if (isvfat) { if (de->name[0] == DELETED_FLAG) @@ -475,69 +498,18 @@ GetNew: } if (isvfat && de->attr == ATTR_EXT) { - struct msdos_dir_slot *ds; - unsigned char id; - unsigned char slot; - unsigned char slots; - unsigned char sum; - unsigned char alias_checksum; - - if (!unicode) { - unicode = (wchar_t *)__get_free_page(GFP_KERNEL); - if (!unicode) { - filp->f_pos = cpos; - brelse(bh); - ret = -ENOMEM; - goto out; - } - } -ParseLong: - slots = 0; - ds = (struct msdos_dir_slot *) de; - id = ds->id; - if (!(id & 0x40)) - goto RecEnd; - slots = id & ~0x40; - if (slots > 20 || !slots) /* ceil(256 * 2 / 26) */ + int status = fat_parse_long(inode, &cpos, &bh, &de, + &unicode, &long_slots); + if (status < 0) { + filp->f_pos = cpos; + ret = status; + goto out; + } else if (status == PARSE_INVALID) goto RecEnd; - long_slots = slots; - alias_checksum = ds->alias_checksum; - - slot = slots; - while (1) { - int offset; - - slot--; - offset = slot * 13; - fat16_towchar(unicode + offset, ds->name0_4, 5); - fat16_towchar(unicode + offset + 5, ds->name5_10, 6); - fat16_towchar(unicode + offset + 11, ds->name11_12, 2); - - if (ds->id & 0x40) { - unicode[offset + 13] = 0; - } - if (fat_get_entry(inode, &cpos, &bh, &de) == -1) - goto EODir; - if (slot == 0) - break; - ds = (struct msdos_dir_slot *) de; - if (ds->attr != ATTR_EXT) - goto RecEnd; /* XXX */ - if ((ds->id & ~0x40) != slot) - goto ParseLong; - if (ds->alias_checksum != alias_checksum) - goto ParseLong; - } - if (de->name[0] == DELETED_FLAG) - goto RecEnd; - if (de->attr == ATTR_EXT) - goto ParseLong; - if (IS_FREE(de->name) || (de->attr & ATTR_VOLUME)) - goto RecEnd; - for (sum = 0, i = 0; i < 11; i++) - sum = (((sum&1)<<7)|((sum&0xfe)>>1)) + de->name[i]; - if (sum != alias_checksum) - long_slots = 0; + else if (status == PARSE_NOT_LONGNAME) + goto parse_record; + else if (status == PARSE_EOF) + goto EODir; } if (sbi->options.dotsOK) { @@ -671,7 +643,7 @@ out: static int fat_readdir(struct file *filp, void *dirent, filldir_t filldir) { struct inode *inode = filp->f_dentry->d_inode; - return fat_readdirx(inode, filp, dirent, filldir, 0, 0); + return __fat_readdir(inode, filp, dirent, filldir, 0, 0); } static int fat_ioctl_filldir(void *__buf, const char *name, int name_len, @@ -760,8 +732,8 @@ static int fat_dir_ioctl(struct inode * inode, struct file * filp, down(&inode->i_sem); ret = -ENOENT; if (!IS_DEADDIR(inode)) { - ret = fat_readdirx(inode, filp, &buf, fat_ioctl_filldir, - short_only, both); + ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir, + short_only, both); } up(&inode->i_sem); if (ret >= 0) diff --git a/fs/file_table.c b/fs/file_table.c index 86ec8ae985b..4dc20554654 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -56,13 +56,13 @@ void filp_dtor(void * objp, struct kmem_cache_s *cachep, unsigned long dflags) static inline void file_free_rcu(struct rcu_head *head) { - struct file *f = container_of(head, struct file, f_rcuhead); + struct file *f = container_of(head, struct file, f_u.fu_rcuhead); kmem_cache_free(filp_cachep, f); } static inline void file_free(struct file *f) { - call_rcu(&f->f_rcuhead, file_free_rcu); + call_rcu(&f->f_u.fu_rcuhead, file_free_rcu); } /* Find an unused file structure and return a pointer to it. @@ -95,7 +95,7 @@ struct file *get_empty_filp(void) f->f_gid = current->fsgid; rwlock_init(&f->f_owner.lock); /* f->f_version: 0 */ - INIT_LIST_HEAD(&f->f_list); + INIT_LIST_HEAD(&f->f_u.fu_list); return f; over: @@ -225,15 +225,15 @@ void file_move(struct file *file, struct list_head *list) if (!list) return; file_list_lock(); - list_move(&file->f_list, list); + list_move(&file->f_u.fu_list, list); file_list_unlock(); } void file_kill(struct file *file) { - if (!list_empty(&file->f_list)) { + if (!list_empty(&file->f_u.fu_list)) { file_list_lock(); - list_del_init(&file->f_list); + list_del_init(&file->f_u.fu_list); file_list_unlock(); } } @@ -245,7 +245,7 @@ int fs_may_remount_ro(struct super_block *sb) /* Check that no files are currently opened for writing. */ file_list_lock(); list_for_each(p, &sb->s_files) { - struct file *file = list_entry(p, struct file, f_list); + struct file *file = list_entry(p, struct file, f_u.fu_list); struct inode *inode = file->f_dentry->d_inode; /* File with pending delete? */ diff --git a/fs/filesystems.c b/fs/filesystems.c index 44082bfdfec..9f1072836c8 100644 --- a/fs/filesystems.c +++ b/fs/filesystems.c @@ -12,6 +12,7 @@ #include <linux/kmod.h> #include <linux/init.h> #include <linux/module.h> +#include <linux/sched.h> /* for 'current' */ #include <asm/uaccess.h> /* diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index e94ab398b71..ffab4783ac6 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -230,7 +230,6 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc) * The inode is clean, unused */ list_move(&inode->i_list, &inode_unused); - inodes_stat.nr_unused++; } } wake_up_inode(inode); @@ -238,14 +237,20 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc) } /* - * Write out an inode's dirty pages. Called under inode_lock. + * Write out an inode's dirty pages. Called under inode_lock. Either the + * caller has ref on the inode (either via __iget or via syscall against an fd) + * or the inode has I_WILL_FREE set (via generic_forget_inode) */ static int -__writeback_single_inode(struct inode *inode, - struct writeback_control *wbc) +__writeback_single_inode(struct inode *inode, struct writeback_control *wbc) { wait_queue_head_t *wqh; + if (!atomic_read(&inode->i_count)) + WARN_ON(!(inode->i_state & I_WILL_FREE)); + else + WARN_ON(inode->i_state & I_WILL_FREE); + if ((wbc->sync_mode != WB_SYNC_ALL) && (inode->i_state & I_LOCK)) { list_move(&inode->i_list, &inode->i_sb->s_dirty); return 0; @@ -259,11 +264,9 @@ __writeback_single_inode(struct inode *inode, wqh = bit_waitqueue(&inode->i_state, __I_LOCK); do { - __iget(inode); spin_unlock(&inode_lock); __wait_on_bit(wqh, &wq, inode_wait, TASK_UNINTERRUPTIBLE); - iput(inode); spin_lock(&inode_lock); } while (inode->i_state & I_LOCK); } @@ -541,14 +544,15 @@ void sync_inodes(int wait) } /** - * write_inode_now - write an inode to disk - * @inode: inode to write to disk - * @sync: whether the write should be synchronous or not + * write_inode_now - write an inode to disk + * @inode: inode to write to disk + * @sync: whether the write should be synchronous or not + * + * This function commits an inode to disk immediately if it is dirty. This is + * primarily needed by knfsd. * - * This function commits an inode to disk immediately if it is - * dirty. This is primarily needed by knfsd. + * The caller must either have a ref on the inode or must have set I_WILL_FREE. */ - int write_inode_now(struct inode *inode, int sync) { int ret; diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index d4c869c6d01..a6f90a6c754 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -151,9 +151,9 @@ void fuse_release_background(struct fuse_req *req) /* * This function is called when a request is finished. Either a reply * has arrived or it was interrupted (and not yet sent) or some error - * occured during communication with userspace, or the device file was - * closed. It decreases the referece count for the request. In case - * of a background request the referece to the stored objects are + * occurred during communication with userspace, or the device file was + * closed. It decreases the reference count for the request. In case + * of a background request the reference to the stored objects are * released. The requester thread is woken up (if still waiting), and * finally the request is either freed or put on the unused_list * diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 29f1e9f6e85..70dba721aca 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -741,13 +741,14 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, if (inode && S_ISDIR(inode->i_mode)) { /* Don't allow creating an alias to a directory */ struct dentry *alias = d_find_alias(inode); - if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) { + if (alias) { dput(alias); iput(inode); return ERR_PTR(-EIO); } } - return d_splice_alias(inode, entry); + d_add(entry, inode); + return NULL; } static int fuse_setxattr(struct dentry *entry, const char *name, diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 24d761518d8..5cb456f572c 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -349,22 +349,22 @@ int fuse_fsync_common(struct file *file, struct dentry *de, int datasync, int isdir); /** - * Initialise file operations on a regular file + * Initialize file operations on a regular file */ void fuse_init_file_inode(struct inode *inode); /** - * Initialise inode operations on regular files and special files + * Initialize inode operations on regular files and special files */ void fuse_init_common(struct inode *inode); /** - * Initialise inode and file operations on a directory + * Initialize inode and file operations on a directory */ void fuse_init_dir(struct inode *inode); /** - * Initialise inode operations on a symlink + * Initialize inode operations on a symlink */ void fuse_init_symlink(struct inode *inode); @@ -411,7 +411,7 @@ struct fuse_req *fuse_get_request(struct fuse_conn *fc); /** * Decrement reference count of a request. If count goes to zero put - * on unused list (preallocated) or free reqest (not preallocated). + * on unused list (preallocated) or free request (not preallocated). */ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); @@ -431,7 +431,7 @@ void request_send_noreply(struct fuse_conn *fc, struct fuse_req *req); void request_send_background(struct fuse_conn *fc, struct fuse_req *req); /** - * Release inodes and file assiciated with background request + * Release inodes and file associated with background request */ void fuse_release_background(struct fuse_req *req); diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c index f1570b9f9de..3f680c5675b 100644 --- a/fs/hfs/inode.c +++ b/fs/hfs/inode.c @@ -46,7 +46,7 @@ static sector_t hfs_bmap(struct address_space *mapping, sector_t block) return generic_block_bmap(mapping, block, hfs_get_block); } -static int hfs_releasepage(struct page *page, int mask) +static int hfs_releasepage(struct page *page, gfp_t mask) { struct inode *inode = page->mapping->host; struct super_block *sb = inode->i_sb; diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index d5642705f63..f205773ddfb 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -40,7 +40,7 @@ static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block) return generic_block_bmap(mapping, block, hfsplus_get_block); } -static int hfsplus_releasepage(struct page *page, int mask) +static int hfsplus_releasepage(struct page *page, gfp_t mask) { struct inode *inode = page->mapping->host; struct super_block *sb = inode->i_sb; diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index fd0f0f050e1..452fc1fdbd3 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -50,6 +50,7 @@ static void hfsplus_read_inode(struct inode *inode) init_MUTEX(&HFSPLUS_I(inode).extents_lock); HFSPLUS_I(inode).flags = 0; HFSPLUS_I(inode).rsrc_inode = NULL; + atomic_set(&HFSPLUS_I(inode).opencnt, 0); if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID) { read_inode: diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 3a9b6d179cb..e026c807e6b 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -45,10 +45,58 @@ static struct backing_dev_info hugetlbfs_backing_dev_info = { int sysctl_hugetlb_shm_group; +static void huge_pagevec_release(struct pagevec *pvec) +{ + int i; + + for (i = 0; i < pagevec_count(pvec); ++i) + put_page(pvec->pages[i]); + + pagevec_reinit(pvec); +} + +/* + * huge_pages_needed tries to determine the number of new huge pages that + * will be required to fully populate this VMA. This will be equal to + * the size of the VMA in huge pages minus the number of huge pages + * (covered by this VMA) that are found in the page cache. + * + * Result is in bytes to be compatible with is_hugepage_mem_enough() + */ +unsigned long +huge_pages_needed(struct address_space *mapping, struct vm_area_struct *vma) +{ + int i; + struct pagevec pvec; + unsigned long start = vma->vm_start; + unsigned long end = vma->vm_end; + unsigned long hugepages = (end - start) >> HPAGE_SHIFT; + pgoff_t next = vma->vm_pgoff; + pgoff_t endpg = next + ((end - start) >> PAGE_SHIFT); + + pagevec_init(&pvec, 0); + while (next < endpg) { + if (!pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) + break; + for (i = 0; i < pagevec_count(&pvec); i++) { + struct page *page = pvec.pages[i]; + if (page->index > next) + next = page->index; + if (page->index >= endpg) + break; + next++; + hugepages--; + } + huge_pagevec_release(&pvec); + } + return hugepages << HPAGE_SHIFT; +} + static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) { struct inode *inode = file->f_dentry->d_inode; struct address_space *mapping = inode->i_mapping; + unsigned long bytes; loff_t len, vma_len; int ret; @@ -67,6 +115,10 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) if (vma->vm_end - vma->vm_start < HPAGE_SIZE) return -EINVAL; + bytes = huge_pages_needed(mapping, vma); + if (!is_hugepage_mem_enough(bytes)) + return -ENOMEM; + vma_len = (loff_t)(vma->vm_end - vma->vm_start); down(&inode->i_sem); @@ -79,10 +131,8 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) if (!(vma->vm_flags & VM_WRITE) && len > inode->i_size) goto out; - ret = hugetlb_prefault(mapping, vma); - if (ret) - goto out; - + ret = 0; + hugetlb_prefault_arch_hook(vma->vm_mm); if (inode->i_size < len) inode->i_size = len; out: @@ -92,7 +142,7 @@ out: } /* - * Called under down_write(mmap_sem), page_table_lock is not held + * Called under down_write(mmap_sem). */ #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA @@ -171,16 +221,6 @@ static int hugetlbfs_commit_write(struct file *file, return -EINVAL; } -static void huge_pagevec_release(struct pagevec *pvec) -{ - int i; - - for (i = 0; i < pagevec_count(pvec); ++i) - put_page(pvec->pages[i]); - - pagevec_reinit(pvec); -} - static void truncate_huge_page(struct page *page) { clear_page_dirty(page); @@ -224,52 +264,35 @@ static void truncate_hugepages(struct address_space *mapping, loff_t lstart) static void hugetlbfs_delete_inode(struct inode *inode) { - struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(inode->i_sb); - - hlist_del_init(&inode->i_hash); - list_del_init(&inode->i_list); - list_del_init(&inode->i_sb_list); - inode->i_state |= I_FREEING; - inodes_stat.nr_inodes--; - spin_unlock(&inode_lock); - if (inode->i_data.nrpages) truncate_hugepages(&inode->i_data, 0); - - security_inode_delete(inode); - - if (sbinfo->free_inodes >= 0) { - spin_lock(&sbinfo->stat_lock); - sbinfo->free_inodes++; - spin_unlock(&sbinfo->stat_lock); - } - clear_inode(inode); - destroy_inode(inode); } static void hugetlbfs_forget_inode(struct inode *inode) { - struct super_block *super_block = inode->i_sb; - struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(super_block); + struct super_block *sb = inode->i_sb; - if (hlist_unhashed(&inode->i_hash)) - goto out_truncate; - - if (!(inode->i_state & (I_DIRTY|I_LOCK))) { - list_del(&inode->i_list); - list_add(&inode->i_list, &inode_unused); - } - inodes_stat.nr_unused++; - if (!super_block || (super_block->s_flags & MS_ACTIVE)) { + if (!hlist_unhashed(&inode->i_hash)) { + if (!(inode->i_state & (I_DIRTY|I_LOCK))) + list_move(&inode->i_list, &inode_unused); + inodes_stat.nr_unused++; + if (!sb || (sb->s_flags & MS_ACTIVE)) { + spin_unlock(&inode_lock); + return; + } + inode->i_state |= I_WILL_FREE; spin_unlock(&inode_lock); - return; + /* + * write_inode_now is a noop as we set BDI_CAP_NO_WRITEBACK + * in our backing_dev_info. + */ + write_inode_now(inode, 1); + spin_lock(&inode_lock); + inode->i_state &= ~I_WILL_FREE; + inodes_stat.nr_unused--; + hlist_del_init(&inode->i_hash); } - - /* write_inode_now() ? */ - inodes_stat.nr_unused--; - hlist_del_init(&inode->i_hash); -out_truncate: list_del_init(&inode->i_list); list_del_init(&inode->i_sb_list); inode->i_state |= I_FREEING; @@ -277,13 +300,6 @@ out_truncate: spin_unlock(&inode_lock); if (inode->i_data.nrpages) truncate_hugepages(&inode->i_data, 0); - - if (sbinfo->free_inodes >= 0) { - spin_lock(&sbinfo->stat_lock); - sbinfo->free_inodes++; - spin_unlock(&sbinfo->stat_lock); - } - clear_inode(inode); destroy_inode(inode); } @@ -291,7 +307,7 @@ out_truncate: static void hugetlbfs_drop_inode(struct inode *inode) { if (!inode->i_nlink) - hugetlbfs_delete_inode(inode); + generic_delete_inode(inode); else hugetlbfs_forget_inode(inode); } @@ -308,7 +324,6 @@ hugetlb_vmtruncate_list(struct prio_tree_root *root, unsigned long h_pgoff) vma_prio_tree_foreach(vma, &iter, root, h_pgoff, ULONG_MAX) { unsigned long h_vm_pgoff; - unsigned long v_length; unsigned long v_offset; h_vm_pgoff = vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT); @@ -319,11 +334,8 @@ hugetlb_vmtruncate_list(struct prio_tree_root *root, unsigned long h_pgoff) if (h_vm_pgoff >= h_pgoff) v_offset = 0; - v_length = vma->vm_end - vma->vm_start; - - zap_hugepage_range(vma, - vma->vm_start + v_offset, - v_length - v_offset); + unmap_hugepage_range(vma, + vma->vm_start + v_offset, vma->vm_end); } } @@ -379,17 +391,6 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid, gid_t gid, int mode, dev_t dev) { struct inode *inode; - struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb); - - if (sbinfo->free_inodes >= 0) { - spin_lock(&sbinfo->stat_lock); - if (!sbinfo->free_inodes) { - spin_unlock(&sbinfo->stat_lock); - return NULL; - } - sbinfo->free_inodes--; - spin_unlock(&sbinfo->stat_lock); - } inode = new_inode(sb); if (inode) { @@ -531,29 +532,51 @@ static void hugetlbfs_put_super(struct super_block *sb) } } +static inline int hugetlbfs_dec_free_inodes(struct hugetlbfs_sb_info *sbinfo) +{ + if (sbinfo->free_inodes >= 0) { + spin_lock(&sbinfo->stat_lock); + if (unlikely(!sbinfo->free_inodes)) { + spin_unlock(&sbinfo->stat_lock); + return 0; + } + sbinfo->free_inodes--; + spin_unlock(&sbinfo->stat_lock); + } + + return 1; +} + +static void hugetlbfs_inc_free_inodes(struct hugetlbfs_sb_info *sbinfo) +{ + if (sbinfo->free_inodes >= 0) { + spin_lock(&sbinfo->stat_lock); + sbinfo->free_inodes++; + spin_unlock(&sbinfo->stat_lock); + } +} + + static kmem_cache_t *hugetlbfs_inode_cachep; static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) { + struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb); struct hugetlbfs_inode_info *p; + if (unlikely(!hugetlbfs_dec_free_inodes(sbinfo))) + return NULL; p = kmem_cache_alloc(hugetlbfs_inode_cachep, SLAB_KERNEL); - if (!p) + if (unlikely(!p)) { + hugetlbfs_inc_free_inodes(sbinfo); return NULL; + } return &p->vfs_inode; } -static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags) -{ - struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo; - - if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == - SLAB_CTOR_CONSTRUCTOR) - inode_init_once(&ei->vfs_inode); -} - static void hugetlbfs_destroy_inode(struct inode *inode) { + hugetlbfs_inc_free_inodes(HUGETLBFS_SB(inode->i_sb)); mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy); kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode)); } @@ -565,6 +588,16 @@ static struct address_space_operations hugetlbfs_aops = { .set_page_dirty = hugetlbfs_set_page_dirty, }; + +static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags) +{ + struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo; + + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) + inode_init_once(&ei->vfs_inode); +} + struct file_operations hugetlbfs_file_operations = { .mmap = hugetlbfs_file_mmap, .fsync = simple_sync_file, @@ -592,6 +625,7 @@ static struct super_operations hugetlbfs_ops = { .alloc_inode = hugetlbfs_alloc_inode, .destroy_inode = hugetlbfs_destroy_inode, .statfs = hugetlbfs_statfs, + .delete_inode = hugetlbfs_delete_inode, .drop_inode = hugetlbfs_drop_inode, .put_super = hugetlbfs_put_super, }; diff --git a/fs/inode.c b/fs/inode.c index f80a79ff156..d8d04bd72b5 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -475,7 +475,7 @@ static void prune_icache(int nr_to_scan) * This function is passed the number of inodes to scan, and it returns the * total number of remaining possibly-reclaimable inodes. */ -static int shrink_icache_memory(int nr, unsigned int gfp_mask) +static int shrink_icache_memory(int nr, gfp_t gfp_mask) { if (nr) { /* @@ -1088,6 +1088,7 @@ static void generic_forget_inode(struct inode *inode) if (inode->i_data.nrpages) truncate_inode_pages(&inode->i_data, 0); clear_inode(inode); + wake_up_inode(inode); destroy_inode(inode); } diff --git a/fs/inotify.c b/fs/inotify.c index a37e9fb1da5..9fbaebfdf40 100644 --- a/fs/inotify.c +++ b/fs/inotify.c @@ -176,6 +176,7 @@ static inline void put_inotify_dev(struct inotify_device *dev) if (atomic_dec_and_test(&dev->count)) { atomic_dec(&dev->user->inotify_devs); free_uid(dev->user); + idr_destroy(&dev->idr); kfree(dev); } } diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 7ae2c4fe506..e4b516ac498 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -1606,7 +1606,7 @@ int journal_blocks_per_page(struct inode *inode) * Simple support for retrying memory allocations. Introduced to help to * debug different VM deadlock avoidance strategies. */ -void * __jbd_kmalloc (const char *where, size_t size, int flags, int retry) +void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry) { return kmalloc(size, flags | (retry ? __GFP_NOFAIL : 0)); } diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c index 49bbc2be3d7..13cb05bf604 100644 --- a/fs/jbd/transaction.c +++ b/fs/jbd/transaction.c @@ -1621,7 +1621,7 @@ out: * while the data is part of a transaction. Yes? */ int journal_try_to_free_buffers(journal_t *journal, - struct page *page, int unused_gfp_mask) + struct page *page, gfp_t unused_gfp_mask) { struct buffer_head *head; struct buffer_head *bh; diff --git a/fs/jffs2/background.c b/fs/jffs2/background.c index 0f224384f17..8210ac16a36 100644 --- a/fs/jffs2/background.c +++ b/fs/jffs2/background.c @@ -15,6 +15,7 @@ #include <linux/jffs2.h> #include <linux/mtd/mtd.h> #include <linux/completion.h> +#include <linux/sched.h> #include "nodelist.h" diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index 996d922e503..316133c626b 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -18,6 +18,8 @@ #include <linux/mtd/mtd.h> #include <linux/crc32.h> #include <linux/mtd/nand.h> +#include <linux/jiffies.h> + #include "nodelist.h" /* For testing write failures */ diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index eadf319bee2..68000a50ceb 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -74,7 +74,7 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno, int nblocks); static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval); -static void dbBackSplit(dmtree_t * tp, int leafno); +static int dbBackSplit(dmtree_t * tp, int leafno); static int dbJoin(dmtree_t * tp, int leafno, int newval); static void dbAdjTree(dmtree_t * tp, int leafno, int newval); static int dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, @@ -305,7 +305,6 @@ int dbSync(struct inode *ipbmap) filemap_fdatawrite(ipbmap->i_mapping); filemap_fdatawait(ipbmap->i_mapping); - ipbmap->i_state |= I_DIRTY; diWriteSpecial(ipbmap, 0); return (0); @@ -2467,7 +2466,9 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level) * that it is at the front of a binary buddy system. */ if (oldval == NOFREE) { - dbBackSplit((dmtree_t *) dcp, leafno); + rc = dbBackSplit((dmtree_t *) dcp, leafno); + if (rc) + return rc; oldval = dcp->stree[ti]; } dbSplit((dmtree_t *) dcp, leafno, dcp->budmin, newval); @@ -2627,7 +2628,7 @@ static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval) * * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit; */ -static void dbBackSplit(dmtree_t * tp, int leafno) +static int dbBackSplit(dmtree_t * tp, int leafno) { int budsz, bud, w, bsz, size; int cursz; @@ -2662,7 +2663,10 @@ static void dbBackSplit(dmtree_t * tp, int leafno) */ for (w = leafno, bsz = budsz;; bsz <<= 1, w = (w < bud) ? w : bud) { - assert(bsz < le32_to_cpu(tp->dmt_nleafs)); + if (bsz >= le32_to_cpu(tp->dmt_nleafs)) { + jfs_err("JFS: block map error in dbBackSplit"); + return -EIO; + } /* determine the buddy. */ @@ -2681,7 +2685,11 @@ static void dbBackSplit(dmtree_t * tp, int leafno) } } - assert(leaf[leafno] == size); + if (leaf[leafno] != size) { + jfs_err("JFS: wrong leaf value in dbBackSplit"); + return -EIO; + } + return 0; } diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c index 4021d46da7e..28201b194f5 100644 --- a/fs/jfs/jfs_imap.c +++ b/fs/jfs/jfs_imap.c @@ -57,6 +57,12 @@ #include "jfs_debug.h" /* + * __mark_inode_dirty expects inodes to be hashed. Since we don't want + * special inodes in the fileset inode space, we hash them to a dummy head + */ +static HLIST_HEAD(aggregate_hash); + +/* * imap locks */ /* iag free list lock */ @@ -491,6 +497,8 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary) /* release the page */ release_metapage(mp); + hlist_add_head(&ip->i_hash, &aggregate_hash); + return (ip); } @@ -514,8 +522,6 @@ void diWriteSpecial(struct inode *ip, int secondary) ino_t inum = ip->i_ino; struct metapage *mp; - ip->i_state &= ~I_DIRTY; - if (secondary) address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage; else diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index 13d7e3f1feb..8a53981f9f2 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -86,7 +86,7 @@ struct meta_anchor { atomic_t io_count; struct metapage *mp[MPS_PER_PAGE]; }; -#define mp_anchor(page) ((struct meta_anchor *)page->private) +#define mp_anchor(page) ((struct meta_anchor *)page_private(page)) static inline struct metapage *page_to_mp(struct page *page, uint offset) { @@ -108,7 +108,7 @@ static inline int insert_metapage(struct page *page, struct metapage *mp) if (!a) return -ENOMEM; memset(a, 0, sizeof(struct meta_anchor)); - page->private = (unsigned long)a; + set_page_private(page, (unsigned long)a); SetPagePrivate(page); kmap(page); } @@ -136,7 +136,7 @@ static inline void remove_metapage(struct page *page, struct metapage *mp) a->mp[index] = NULL; if (--a->mp_count == 0) { kfree(a); - page->private = 0; + set_page_private(page, 0); ClearPagePrivate(page); kunmap(page); } @@ -156,13 +156,13 @@ static inline void dec_io(struct page *page, void (*handler) (struct page *)) #else static inline struct metapage *page_to_mp(struct page *page, uint offset) { - return PagePrivate(page) ? (struct metapage *)page->private : NULL; + return PagePrivate(page) ? (struct metapage *)page_private(page) : NULL; } static inline int insert_metapage(struct page *page, struct metapage *mp) { if (mp) { - page->private = (unsigned long)mp; + set_page_private(page, (unsigned long)mp); SetPagePrivate(page); kmap(page); } @@ -171,7 +171,7 @@ static inline int insert_metapage(struct page *page, struct metapage *mp) static inline void remove_metapage(struct page *page, struct metapage *mp) { - page->private = 0; + set_page_private(page, 0); ClearPagePrivate(page); kunmap(page); } @@ -198,7 +198,7 @@ static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags) } } -static inline struct metapage *alloc_metapage(unsigned int gfp_mask) +static inline struct metapage *alloc_metapage(gfp_t gfp_mask) { return mempool_alloc(metapage_mempool, gfp_mask); } @@ -395,6 +395,12 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) if (mp->nohomeok && !test_bit(META_forcewrite, &mp->flag)) { redirty = 1; + /* + * Make sure this page isn't blocked indefinitely. + * If the journal isn't undergoing I/O, push it + */ + if (mp->log && !(mp->log->cflag & logGC_PAGEOUT)) + jfs_flush_journal(mp->log, 0); continue; } @@ -534,7 +540,7 @@ add_failed: return -EIO; } -static int metapage_releasepage(struct page *page, int gfp_mask) +static int metapage_releasepage(struct page *page, gfp_t gfp_mask) { struct metapage *mp; int busy = 0; diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c index 9b71ed2674f..b660c93c92d 100644 --- a/fs/jfs/jfs_txnmgr.c +++ b/fs/jfs/jfs_txnmgr.c @@ -2396,7 +2396,6 @@ static void txUpdateMap(struct tblock * tblk) */ if (tblk->xflag & COMMIT_CREATE) { diUpdatePMap(ipimap, tblk->ino, FALSE, tblk); - ipimap->i_state |= I_DIRTY; /* update persistent block allocation map * for the allocation of inode extent; */ @@ -2407,7 +2406,6 @@ static void txUpdateMap(struct tblock * tblk) } else if (tblk->xflag & COMMIT_DELETE) { ip = tblk->u.ip; diUpdatePMap(ipimap, ip->i_ino, TRUE, tblk); - ipimap->i_state |= I_DIRTY; iput(ip); } } diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c index a7fe2f2b969..e72f4ebb6e9 100644 --- a/fs/jfs/jfs_xtree.c +++ b/fs/jfs/jfs_xtree.c @@ -3516,16 +3516,10 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) /* process entries backward from last index */ index = le16_to_cpu(p->header.nextindex) - 1; - if (p->header.flag & BT_INTERNAL) - goto getChild; - - /* - * leaf page - */ - /* Since this is the rightmost leaf, and we may have already freed - * a page that was formerly to the right, let's make sure that the - * next pointer is zero. + /* Since this is the rightmost page at this level, and we may have + * already freed a page that was formerly to the right, let's make + * sure that the next pointer is zero. */ if (p->header.next) { if (log) @@ -3539,6 +3533,12 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag) p->header.next = 0; } + if (p->header.flag & BT_INTERNAL) + goto getChild; + + /* + * leaf page + */ freed = 0; /* does region covered by leaf page precede Teof ? */ diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 71bc34b96b2..4226af3ea91 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -442,6 +442,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) inode->i_nlink = 1; inode->i_size = sb->s_bdev->bd_inode->i_size; inode->i_mapping->a_ops = &jfs_metapage_aops; + insert_inode_hash(inode); mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); sbi->direct_inode = inode; diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 82c77df81c5..c4c8601096e 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -173,11 +173,10 @@ nlm_bind_host(struct nlm_host *host) /* If we've already created an RPC client, check whether * RPC rebind is required - * Note: why keep rebinding if we're on a tcp connection? */ if ((clnt = host->h_rpcclnt) != NULL) { xprt = clnt->cl_xprt; - if (!xprt->stream && time_after_eq(jiffies, host->h_nextrebind)) { + if (time_after_eq(jiffies, host->h_nextrebind)) { clnt->cl_port = 0; host->h_nextrebind = jiffies + NLM_HOST_REBIND; dprintk("lockd: next rebind in %ld jiffies\n", @@ -189,7 +188,6 @@ nlm_bind_host(struct nlm_host *host) goto forgetit; xprt_set_timeout(&xprt->timeout, 5, nlmsvc_timeout); - xprt->nocong = 1; /* No congestion control for NLM */ xprt->resvport = 1; /* NLM requires a reserved port */ /* Existing NLM servers accept AUTH_UNIX only */ diff --git a/fs/locks.c b/fs/locks.c index f7daa5f4894..a1e8b224801 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -316,21 +316,22 @@ static int flock_to_posix_lock(struct file *filp, struct file_lock *fl, /* POSIX-1996 leaves the case l->l_len < 0 undefined; POSIX-2001 defines it. */ start += l->l_start; - end = start + l->l_len - 1; - if (l->l_len < 0) { + if (start < 0) + return -EINVAL; + fl->fl_end = OFFSET_MAX; + if (l->l_len > 0) { + end = start + l->l_len - 1; + fl->fl_end = end; + } else if (l->l_len < 0) { end = start - 1; + fl->fl_end = end; start += l->l_len; + if (start < 0) + return -EINVAL; } - - if (start < 0) - return -EINVAL; - if (l->l_len > 0 && end < 0) - return -EOVERFLOW; - fl->fl_start = start; /* we record the absolute position */ - fl->fl_end = end; - if (l->l_len == 0) - fl->fl_end = OFFSET_MAX; + if (fl->fl_end < fl->fl_start) + return -EOVERFLOW; fl->fl_owner = current->files; fl->fl_pid = current->tgid; @@ -362,14 +363,21 @@ static int flock64_to_posix_lock(struct file *filp, struct file_lock *fl, return -EINVAL; } - if (((start += l->l_start) < 0) || (l->l_len < 0)) + start += l->l_start; + if (start < 0) return -EINVAL; - fl->fl_end = start + l->l_len - 1; - if (l->l_len > 0 && fl->fl_end < 0) - return -EOVERFLOW; + fl->fl_end = OFFSET_MAX; + if (l->l_len > 0) { + fl->fl_end = start + l->l_len - 1; + } else if (l->l_len < 0) { + fl->fl_end = start - 1; + start += l->l_len; + if (start < 0) + return -EINVAL; + } fl->fl_start = start; /* we record the absolute position */ - if (l->l_len == 0) - fl->fl_end = OFFSET_MAX; + if (fl->fl_end < fl->fl_start) + return -EOVERFLOW; fl->fl_owner = current->files; fl->fl_pid = current->tgid; @@ -829,12 +837,16 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request) /* Detect adjacent or overlapping regions (if same lock type) */ if (request->fl_type == fl->fl_type) { + /* In all comparisons of start vs end, use + * "start - 1" rather than "end + 1". If end + * is OFFSET_MAX, end + 1 will become negative. + */ if (fl->fl_end < request->fl_start - 1) goto next_lock; /* If the next lock in the list has entirely bigger * addresses than the new one, insert the lock here. */ - if (fl->fl_start > request->fl_end + 1) + if (fl->fl_start - 1 > request->fl_end) break; /* If we come here, the new and old lock are of the diff --git a/fs/mbcache.c b/fs/mbcache.c index b002a088857..298997f1747 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -116,7 +116,7 @@ mb_cache_indexes(struct mb_cache *cache) * What the mbcache registers as to get shrunk dynamically. */ -static int mb_cache_shrink_fn(int nr_to_scan, unsigned int gfp_mask); +static int mb_cache_shrink_fn(int nr_to_scan, gfp_t gfp_mask); static inline int @@ -140,7 +140,7 @@ __mb_cache_entry_unhash(struct mb_cache_entry *ce) static inline void -__mb_cache_entry_forget(struct mb_cache_entry *ce, int gfp_mask) +__mb_cache_entry_forget(struct mb_cache_entry *ce, gfp_t gfp_mask) { struct mb_cache *cache = ce->e_cache; @@ -193,7 +193,7 @@ forget: * Returns the number of objects which are present in the cache. */ static int -mb_cache_shrink_fn(int nr_to_scan, unsigned int gfp_mask) +mb_cache_shrink_fn(int nr_to_scan, gfp_t gfp_mask) { LIST_HEAD(free_list); struct list_head *l, *ltmp; diff --git a/fs/msdos/namei.c b/fs/msdos/namei.c index 154f511c724..626a367bcd8 100644 --- a/fs/msdos/namei.c +++ b/fs/msdos/namei.c @@ -454,10 +454,10 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name, { struct buffer_head *dotdot_bh; struct msdos_dir_entry *dotdot_de; - loff_t dotdot_i_pos; struct inode *old_inode, *new_inode; struct fat_slot_info old_sinfo, sinfo; struct timespec ts; + loff_t dotdot_i_pos, new_i_pos; int err, old_attrs, is_dir, update_dotdot, corrupt = 0; old_sinfo.bh = sinfo.bh = dotdot_bh = NULL; @@ -516,28 +516,24 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name, if (new_inode) { if (err) goto out; - if (MSDOS_I(new_inode)->i_pos != sinfo.i_pos) { - /* WTF??? Cry and fail. */ - printk(KERN_WARNING "msdos_rename: fs corrupted\n"); - goto out; - } - if (is_dir) { err = fat_dir_empty(new_inode); if (err) goto out; } + new_i_pos = MSDOS_I(new_inode)->i_pos; fat_detach(new_inode); } else { err = msdos_add_entry(new_dir, new_name, is_dir, is_hid, 0, &ts, &sinfo); if (err) goto out; + new_i_pos = sinfo.i_pos; } new_dir->i_version++; fat_detach(old_inode); - fat_attach(old_inode, sinfo.i_pos); + fat_attach(old_inode, new_i_pos); if (is_hid) MSDOS_I(old_inode)->i_attrs |= ATTR_HIDDEN; else @@ -604,7 +600,7 @@ error_inode: fat_attach(old_inode, old_sinfo.i_pos); MSDOS_I(old_inode)->i_attrs = old_attrs; if (new_inode) { - fat_attach(new_inode, sinfo.i_pos); + fat_attach(new_inode, new_i_pos); if (corrupt) corrupt |= fat_sync_inode(new_inode); } else { diff --git a/fs/namei.c b/fs/namei.c index aa62dbda93a..c5769c4fcab 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -28,6 +28,7 @@ #include <linux/syscalls.h> #include <linux/mount.h> #include <linux/audit.h> +#include <linux/file.h> #include <asm/namei.h> #include <asm/uaccess.h> @@ -317,6 +318,18 @@ void path_release_on_umount(struct nameidata *nd) mntput_no_expire(nd->mnt); } +/** + * release_open_intent - free up open intent resources + * @nd: pointer to nameidata + */ +void release_open_intent(struct nameidata *nd) +{ + if (nd->intent.open.file->f_dentry == NULL) + put_filp(nd->intent.open.file); + else + fput(nd->intent.open.file); +} + /* * Internal lookup() using the new generic dcache. * SMP-safe @@ -750,6 +763,7 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd) struct qstr this; unsigned int c; + nd->flags |= LOOKUP_CONTINUE; err = exec_permission_lite(inode, nd); if (err == -EAGAIN) { err = permission(inode, MAY_EXEC, nd); @@ -802,7 +816,6 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd) if (err < 0) break; } - nd->flags |= LOOKUP_CONTINUE; /* This does the actual lookups.. */ err = do_lookup(nd, &this, &next); if (err) @@ -1052,6 +1065,70 @@ out: return retval; } +static int __path_lookup_intent_open(const char *name, unsigned int lookup_flags, + struct nameidata *nd, int open_flags, int create_mode) +{ + struct file *filp = get_empty_filp(); + int err; + + if (filp == NULL) + return -ENFILE; + nd->intent.open.file = filp; + nd->intent.open.flags = open_flags; + nd->intent.open.create_mode = create_mode; + err = path_lookup(name, lookup_flags|LOOKUP_OPEN, nd); + if (IS_ERR(nd->intent.open.file)) { + if (err == 0) { + err = PTR_ERR(nd->intent.open.file); + path_release(nd); + } + } else if (err != 0) + release_open_intent(nd); + return err; +} + +/** + * path_lookup_open - lookup a file path with open intent + * @name: pointer to file name + * @lookup_flags: lookup intent flags + * @nd: pointer to nameidata + * @open_flags: open intent flags + */ +int path_lookup_open(const char *name, unsigned int lookup_flags, + struct nameidata *nd, int open_flags) +{ + return __path_lookup_intent_open(name, lookup_flags, nd, + open_flags, 0); +} + +/** + * path_lookup_create - lookup a file path with open + create intent + * @name: pointer to file name + * @lookup_flags: lookup intent flags + * @nd: pointer to nameidata + * @open_flags: open intent flags + * @create_mode: create intent flags + */ +int path_lookup_create(const char *name, unsigned int lookup_flags, + struct nameidata *nd, int open_flags, int create_mode) +{ + return __path_lookup_intent_open(name, lookup_flags|LOOKUP_CREATE, nd, + open_flags, create_mode); +} + +int __user_path_lookup_open(const char __user *name, unsigned int lookup_flags, + struct nameidata *nd, int open_flags) +{ + char *tmp = getname(name); + int err = PTR_ERR(tmp); + + if (!IS_ERR(tmp)) { + err = __path_lookup_intent_open(tmp, lookup_flags, nd, open_flags, 0); + putname(tmp); + } + return err; +} + /* * Restricted form of lookup. Doesn't follow links, single-component only, * needs parent already locked. Doesn't follow mounts. @@ -1234,9 +1311,6 @@ static inline int may_create(struct inode *dir, struct dentry *child, } /* - * Special case: O_CREAT|O_EXCL implies O_NOFOLLOW for security - * reasons. - * * O_DIRECTORY translates into forcing a directory lookup. */ static inline int lookup_flags(unsigned int f) @@ -1246,9 +1320,6 @@ static inline int lookup_flags(unsigned int f) if (f & O_NOFOLLOW) retval &= ~LOOKUP_FOLLOW; - if ((f & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL)) - retval &= ~LOOKUP_FOLLOW; - if (f & O_DIRECTORY) retval |= LOOKUP_DIRECTORY; @@ -1416,27 +1487,27 @@ int may_open(struct nameidata *nd, int acc_mode, int flag) */ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd) { - int acc_mode, error = 0; + int acc_mode, error; struct path path; struct dentry *dir; int count = 0; acc_mode = ACC_MODE(flag); + /* O_TRUNC implies we need access checks for write permissions */ + if (flag & O_TRUNC) + acc_mode |= MAY_WRITE; + /* Allow the LSM permission hook to distinguish append access from general write access. */ if (flag & O_APPEND) acc_mode |= MAY_APPEND; - /* Fill in the open() intent data */ - nd->intent.open.flags = flag; - nd->intent.open.create_mode = mode; - /* * The simplest case - just a plain lookup. */ if (!(flag & O_CREAT)) { - error = path_lookup(pathname, lookup_flags(flag)|LOOKUP_OPEN, nd); + error = path_lookup_open(pathname, lookup_flags(flag), nd, flag); if (error) return error; goto ok; @@ -1445,7 +1516,7 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd) /* * Create - we need to know the parent. */ - error = path_lookup(pathname, LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE, nd); + error = path_lookup_create(pathname, LOOKUP_PARENT, nd, flag, mode); if (error) return error; @@ -1520,6 +1591,8 @@ ok: exit_dput: dput_path(&path, nd); exit: + if (!IS_ERR(nd->intent.open.file)) + release_open_intent(nd); path_release(nd); return error; diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 4a36839f0bb..44135af9894 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -142,7 +142,7 @@ static void nfs_msync_inode(struct inode *inode) /* * Basic procedure for returning a delegation to the server */ -int nfs_inode_return_delegation(struct inode *inode) +int __nfs_inode_return_delegation(struct inode *inode) { struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state; struct nfs_inode *nfsi = NFS_I(inode); diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 3f6c45a29d6..8017846b561 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -25,7 +25,7 @@ struct nfs_delegation { 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 __nfs_inode_return_delegation(struct inode *inode); int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid); struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle); @@ -47,11 +47,25 @@ static inline int nfs_have_delegation(struct inode *inode, int flags) return 1; return 0; } + +static inline int nfs_inode_return_delegation(struct inode *inode) +{ + int err = 0; + + if (NFS_I(inode)->delegation != NULL) + err = __nfs_inode_return_delegation(inode); + return err; +} #else static inline int nfs_have_delegation(struct inode *inode, int flags) { return 0; } + +static inline int nfs_inode_return_delegation(struct inode *inode) +{ + return 0; +} #endif #endif diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 2df639f143e..8272ed3fc70 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -532,6 +532,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) my_entry.eof = 0; my_entry.fh = &fh; my_entry.fattr = &fattr; + nfs_fattr_init(&fattr); desc->entry = &my_entry; while(!desc->entry->eof) { @@ -565,8 +566,6 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) } } unlock_kernel(); - if (desc->error < 0) - return desc->error; if (res < 0) return res; return 0; @@ -803,6 +802,7 @@ static int nfs_dentry_delete(struct dentry *dentry) */ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode) { + nfs_inode_return_delegation(inode); if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { lock_kernel(); inode->i_nlink--; @@ -853,12 +853,6 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru dentry->d_op = NFS_PROTO(dir)->dentry_ops; lock_kernel(); - /* Revalidate parent directory attribute cache */ - error = nfs_revalidate_inode(NFS_SERVER(dir), dir); - if (error < 0) { - res = ERR_PTR(error); - goto out_unlock; - } /* If we're doing an exclusive create, optimize away the lookup */ if (nfs_is_exclusive_create(dir, nd)) @@ -916,7 +910,6 @@ static int is_atomic_open(struct inode *dir, struct nameidata *nd) static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { struct dentry *res = NULL; - struct inode *inode = NULL; int error; /* Check that we are indeed trying to open this file */ @@ -930,8 +923,10 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry dentry->d_op = NFS_PROTO(dir)->dentry_ops; /* Let vfs_create() deal with O_EXCL */ - if (nd->intent.open.flags & O_EXCL) - goto no_entry; + if (nd->intent.open.flags & O_EXCL) { + d_add(dentry, NULL); + goto out; + } /* Open the file on the server */ lock_kernel(); @@ -945,32 +940,30 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry if (nd->intent.open.flags & O_CREAT) { nfs_begin_data_update(dir); - inode = nfs4_atomic_open(dir, dentry, nd); + res = nfs4_atomic_open(dir, dentry, nd); nfs_end_data_update(dir); } else - inode = nfs4_atomic_open(dir, dentry, nd); + res = nfs4_atomic_open(dir, dentry, nd); unlock_kernel(); - if (IS_ERR(inode)) { - error = PTR_ERR(inode); + if (IS_ERR(res)) { + error = PTR_ERR(res); switch (error) { /* Make a negative dentry */ case -ENOENT: - inode = NULL; - break; + res = NULL; + goto out; /* This turned out not to be a regular file */ + case -EISDIR: + case -ENOTDIR: + goto no_open; case -ELOOP: if (!(nd->intent.open.flags & O_NOFOLLOW)) goto no_open; - /* case -EISDIR: */ /* case -EINVAL: */ default: - res = ERR_PTR(error); goto out; } - } -no_entry: - res = d_add_unique(dentry, inode); - if (res != NULL) + } else if (res != NULL) dentry = res; nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); @@ -1014,7 +1007,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) */ lock_kernel(); verifier = nfs_save_change_attribute(dir); - ret = nfs4_open_revalidate(dir, dentry, openflags); + ret = nfs4_open_revalidate(dir, dentry, openflags, nd); if (!ret) nfs_set_verifier(dentry, verifier); unlock_kernel(); @@ -1137,7 +1130,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, lock_kernel(); nfs_begin_data_update(dir); - error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags); + error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd); nfs_end_data_update(dir); if (error != 0) goto out_err; @@ -1332,6 +1325,7 @@ static int nfs_safe_remove(struct dentry *dentry) nfs_begin_data_update(dir); if (inode != NULL) { + nfs_inode_return_delegation(inode); nfs_begin_data_update(inode); error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); /* The VFS may want to delete this inode */ @@ -1438,17 +1432,14 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) old_dentry->d_parent->d_name.name, old_dentry->d_name.name, dentry->d_parent->d_name.name, dentry->d_name.name); - /* - * Drop the dentry in advance to force a new lookup. - * Since nfs_proc_link doesn't return a file handle, - * we can't use the existing dentry. - */ lock_kernel(); - d_drop(dentry); - nfs_begin_data_update(dir); nfs_begin_data_update(inode); error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name); + if (error == 0) { + atomic_inc(&inode->i_count); + d_instantiate(dentry, inode); + } nfs_end_data_update(inode); nfs_end_data_update(dir); unlock_kernel(); @@ -1512,9 +1503,11 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, */ if (!new_inode) goto go_ahead; - if (S_ISDIR(new_inode->i_mode)) - goto out; - else if (atomic_read(&new_dentry->d_count) > 2) { + if (S_ISDIR(new_inode->i_mode)) { + error = -EISDIR; + if (!S_ISDIR(old_inode->i_mode)) + goto out; + } else if (atomic_read(&new_dentry->d_count) > 2) { int err; /* copy the target dentry's name */ dentry = d_alloc(new_dentry->d_parent, @@ -1539,7 +1532,8 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, #endif goto out; } - } + } else + new_inode->i_nlink--; go_ahead: /* @@ -1549,6 +1543,7 @@ go_ahead: nfs_wb_all(old_inode); shrink_dcache_parent(old_dentry); } + nfs_inode_return_delegation(old_inode); if (new_inode) d_delete(new_dentry); diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 6bdcfa95de9..57d3e77d97e 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -205,8 +205,8 @@ nfs_file_flush(struct file *file) if (!status) { status = ctx->error; ctx->error = 0; - if (!status && !nfs_have_delegation(inode, FMODE_READ)) - __nfs_revalidate_inode(NFS_SERVER(inode), inode); + if (!status) + nfs_revalidate_inode(NFS_SERVER(inode), inode); } unlock_kernel(); return status; @@ -376,22 +376,31 @@ out_swapfile: static int do_getlk(struct file *filp, int cmd, struct file_lock *fl) { + struct file_lock *cfl; struct inode *inode = filp->f_mapping->host; int status = 0; lock_kernel(); - /* Use local locking if mounted with "-onolock" */ - if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)) - status = NFS_PROTO(inode)->lock(filp, cmd, fl); - else { - struct file_lock *cfl = posix_test_lock(filp, fl); - - fl->fl_type = F_UNLCK; - if (cfl != NULL) - memcpy(fl, cfl, sizeof(*fl)); + /* Try local locking first */ + cfl = posix_test_lock(filp, fl); + if (cfl != NULL) { + locks_copy_lock(fl, cfl); + goto out; } + + if (nfs_have_delegation(inode, FMODE_READ)) + goto out_noconflict; + + if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM) + goto out_noconflict; + + status = NFS_PROTO(inode)->lock(filp, cmd, fl); +out: unlock_kernel(); return status; +out_noconflict: + fl->fl_type = F_UNLCK; + goto out; } static int do_vfs_lock(struct file *file, struct file_lock *fl) diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index d4eadeea128..fc0f12ba89c 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -358,6 +358,35 @@ out_no_root: return no_root_error; } +static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) +{ + to->to_initval = timeo * HZ / 10; + to->to_retries = retrans; + if (!to->to_retries) + to->to_retries = 2; + + switch (proto) { + case IPPROTO_TCP: + if (!to->to_initval) + to->to_initval = 60 * HZ; + if (to->to_initval > NFS_MAX_TCP_TIMEOUT) + to->to_initval = NFS_MAX_TCP_TIMEOUT; + to->to_increment = to->to_initval; + to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); + to->to_exponential = 0; + break; + case IPPROTO_UDP: + default: + if (!to->to_initval) + to->to_initval = 11 * HZ / 10; + if (to->to_initval > NFS_MAX_UDP_TIMEOUT) + to->to_initval = NFS_MAX_UDP_TIMEOUT; + to->to_maxval = NFS_MAX_UDP_TIMEOUT; + to->to_exponential = 1; + break; + } +} + /* * Create an RPC client handle. */ @@ -367,22 +396,12 @@ nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) struct rpc_timeout timeparms; struct rpc_xprt *xprt = NULL; struct rpc_clnt *clnt = NULL; - int tcp = (data->flags & NFS_MOUNT_TCP); + int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; - /* Initialize timeout values */ - timeparms.to_initval = data->timeo * HZ / 10; - timeparms.to_retries = data->retrans; - timeparms.to_maxval = tcp ? RPC_MAX_TCP_TIMEOUT : RPC_MAX_UDP_TIMEOUT; - timeparms.to_exponential = 1; - - if (!timeparms.to_initval) - timeparms.to_initval = (tcp ? 600 : 11) * HZ / 10; - if (!timeparms.to_retries) - timeparms.to_retries = 5; + nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); /* create transport and client */ - xprt = xprt_create_proto(tcp ? IPPROTO_TCP : IPPROTO_UDP, - &server->addr, &timeparms); + xprt = xprt_create_proto(proto, &server->addr, &timeparms); if (IS_ERR(xprt)) { dprintk("%s: cannot create RPC transport. Error = %ld\n", __FUNCTION__, PTR_ERR(xprt)); @@ -576,7 +595,6 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) { NFS_MOUNT_SOFT, ",soft", ",hard" }, { NFS_MOUNT_INTR, ",intr", "" }, { NFS_MOUNT_POSIX, ",posix", "" }, - { NFS_MOUNT_TCP, ",tcp", ",udp" }, { NFS_MOUNT_NOCTO, ",nocto", "" }, { NFS_MOUNT_NOAC, ",noac", "" }, { NFS_MOUNT_NONLM, ",nolock", ",lock" }, @@ -585,6 +603,8 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) }; struct proc_nfs_info *nfs_infop; struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); + char buf[12]; + char *proto; seq_printf(m, ",v%d", nfss->rpc_ops->version); seq_printf(m, ",rsize=%d", nfss->rsize); @@ -603,6 +623,18 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) else seq_puts(m, nfs_infop->nostr); } + switch (nfss->client->cl_xprt->prot) { + case IPPROTO_TCP: + proto = "tcp"; + break; + case IPPROTO_UDP: + proto = "udp"; + break; + default: + snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); + proto = buf; + } + seq_printf(m, ",proto=%s", proto); seq_puts(m, ",addr="); seq_escape(m, nfss->hostname, " \t\n\\"); return 0; @@ -753,7 +785,8 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) else init_special_inode(inode, inode->i_mode, fattr->rdev); - nfsi->read_cache_jiffies = fattr->timestamp; + nfsi->read_cache_jiffies = fattr->time_start; + nfsi->last_updated = jiffies; inode->i_atime = fattr->atime; inode->i_mtime = fattr->mtime; inode->i_ctime = fattr->ctime; @@ -821,6 +854,11 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) filemap_fdatawait(inode->i_mapping); nfs_wb_all(inode); } + /* + * 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); error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); if (error == 0) nfs_refresh_inode(inode, &fattr); @@ -1019,15 +1057,11 @@ int nfs_open(struct inode *inode, struct file *filp) ctx->mode = filp->f_mode; nfs_file_set_open_context(filp, ctx); put_nfs_open_context(ctx); - if ((filp->f_mode & FMODE_WRITE) != 0) - nfs_begin_data_update(inode); return 0; } int nfs_release(struct inode *inode, struct file *filp) { - if ((filp->f_mode & FMODE_WRITE) != 0) - nfs_end_data_update(inode); nfs_file_clear_open_context(filp); return 0; } @@ -1083,14 +1117,15 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) goto out; } + spin_lock(&inode->i_lock); status = nfs_update_inode(inode, &fattr, verifier); if (status) { + spin_unlock(&inode->i_lock); dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", inode->i_sb->s_id, (long long)NFS_FILEID(inode), status); goto out; } - spin_lock(&inode->i_lock); cache_validity = nfsi->cache_validity; nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; @@ -1098,7 +1133,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) * We may need to keep the attributes marked as invalid if * we raced with nfs_end_attr_update(). */ - if (verifier == nfsi->cache_change_attribute) + if (time_after_eq(verifier, nfsi->cache_change_attribute)) nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); spin_unlock(&inode->i_lock); @@ -1165,7 +1200,7 @@ void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) if (S_ISDIR(inode->i_mode)) { memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); /* This ensures we revalidate child dentries */ - nfsi->cache_change_attribute++; + nfsi->cache_change_attribute = jiffies; } spin_unlock(&inode->i_lock); @@ -1197,20 +1232,19 @@ void nfs_end_data_update(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); if (!nfs_have_delegation(inode, FMODE_READ)) { - /* Mark the attribute cache for revalidation */ - spin_lock(&inode->i_lock); - nfsi->cache_validity |= NFS_INO_INVALID_ATTR; - /* Directories and symlinks: invalidate page cache too */ - if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) + /* Directories and symlinks: invalidate page cache */ + if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { + spin_lock(&inode->i_lock); nfsi->cache_validity |= NFS_INO_INVALID_DATA; - spin_unlock(&inode->i_lock); + spin_unlock(&inode->i_lock); + } } - nfsi->cache_change_attribute ++; + nfsi->cache_change_attribute = jiffies; atomic_dec(&nfsi->data_updates); } /** - * nfs_refresh_inode - verify consistency of the inode attribute cache + * nfs_check_inode_attributes - verify consistency of the inode attribute cache * @inode - pointer to inode * @fattr - updated attributes * @@ -1218,13 +1252,12 @@ void nfs_end_data_update(struct inode *inode) * so that fattr carries weak cache consistency data, then it may * also update the ctime/mtime/change_attribute. */ -int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) +static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) { struct nfs_inode *nfsi = NFS_I(inode); loff_t cur_size, new_isize; int data_unstable; - spin_lock(&inode->i_lock); /* Are we in the process of updating data on the server? */ data_unstable = nfs_caches_unstable(inode); @@ -1241,14 +1274,12 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) } if ((fattr->valid & NFS_ATTR_FATTR) == 0) { - spin_unlock(&inode->i_lock); return 0; } /* Has the inode gone and changed behind our back? */ if (nfsi->fileid != fattr->fileid || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { - spin_unlock(&inode->i_lock); return -EIO; } @@ -1288,11 +1319,67 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) if (!timespec_equal(&inode->i_atime, &fattr->atime)) nfsi->cache_validity |= NFS_INO_INVALID_ATIME; - nfsi->read_cache_jiffies = fattr->timestamp; - spin_unlock(&inode->i_lock); + nfsi->read_cache_jiffies = fattr->time_start; return 0; } +/** + * nfs_refresh_inode - try to update the inode attribute cache + * @inode - pointer to inode + * @fattr - updated attributes + * + * Check that an RPC call that returned attributes has not overlapped with + * other recent updates of the inode metadata, then decide whether it is + * safe to do a full update of the inode attributes, or whether just to + * call nfs_check_inode_attributes. + */ +int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) +{ + struct nfs_inode *nfsi = NFS_I(inode); + int status; + + if ((fattr->valid & NFS_ATTR_FATTR) == 0) + return 0; + spin_lock(&inode->i_lock); + nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; + if (nfs_verify_change_attribute(inode, fattr->time_start)) + nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); + if (time_after(fattr->time_start, nfsi->last_updated)) + status = nfs_update_inode(inode, fattr, fattr->time_start); + else + status = nfs_check_inode_attributes(inode, fattr); + + spin_unlock(&inode->i_lock); + return status; +} + +/** + * nfs_post_op_update_inode - try to update the inode attribute cache + * @inode - pointer to inode + * @fattr - updated attributes + * + * After an operation that has changed the inode metadata, mark the + * attribute cache as being invalid, then try to update it. + */ +int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) +{ + struct nfs_inode *nfsi = NFS_I(inode); + int status = 0; + + spin_lock(&inode->i_lock); + if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { + nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; + goto out; + } + status = nfs_update_inode(inode, fattr, fattr->time_start); + if (time_after_eq(fattr->time_start, nfsi->cache_change_attribute)) + nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); + nfsi->cache_change_attribute = jiffies; +out: + spin_unlock(&inode->i_lock); + return status; +} + /* * Many nfs protocol calls return the new file attributes after * an operation. Here we update the inode to reflect the state @@ -1328,20 +1415,17 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign goto out_err; } - spin_lock(&inode->i_lock); - /* * Make sure the inode's type hasn't changed. */ - if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { - spin_unlock(&inode->i_lock); + if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) goto out_changed; - } /* * Update the read time so we don't revalidate too often. */ - nfsi->read_cache_jiffies = fattr->timestamp; + nfsi->read_cache_jiffies = fattr->time_start; + nfsi->last_updated = jiffies; /* Are we racing with known updates of the metadata on the server? */ data_unstable = ! (nfs_verify_change_attribute(inode, verifier) || @@ -1354,7 +1438,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign /* Do we perhaps have any outstanding writes? */ if (nfsi->npages == 0) { /* No, but did we race with nfs_end_data_update()? */ - if (verifier == nfsi->cache_change_attribute) { + if (time_after_eq(verifier, nfsi->cache_change_attribute)) { inode->i_size = new_isize; invalid |= NFS_INO_INVALID_DATA; } @@ -1430,7 +1514,6 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign if (!nfs_have_delegation(inode, FMODE_READ)) nfsi->cache_validity |= invalid; - spin_unlock(&inode->i_lock); return 0; out_changed: /* @@ -1639,8 +1722,7 @@ static void nfs4_clear_inode(struct inode *inode) struct nfs_inode *nfsi = NFS_I(inode); /* If we are holding a delegation, return it! */ - if (nfsi->delegation != NULL) - nfs_inode_return_delegation(inode); + nfs_inode_return_delegation(inode); /* First call standard NFS clear_inode() code */ nfs_clear_inode(inode); /* Now clear out any remaining state */ @@ -1669,7 +1751,7 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, struct rpc_clnt *clnt = NULL; struct rpc_timeout timeparms; rpc_authflavor_t authflavour; - int proto, err = -EIO; + int err = -EIO; sb->s_blocksize_bits = 0; sb->s_blocksize = 0; @@ -1687,30 +1769,8 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, server->acdirmax = data->acdirmax*HZ; server->rpc_ops = &nfs_v4_clientops; - /* Initialize timeout values */ - - timeparms.to_initval = data->timeo * HZ / 10; - timeparms.to_retries = data->retrans; - timeparms.to_exponential = 1; - if (!timeparms.to_retries) - timeparms.to_retries = 5; - proto = data->proto; - /* Which IP protocol do we use? */ - switch (proto) { - case IPPROTO_TCP: - timeparms.to_maxval = RPC_MAX_TCP_TIMEOUT; - if (!timeparms.to_initval) - timeparms.to_initval = 600 * HZ / 10; - break; - case IPPROTO_UDP: - timeparms.to_maxval = RPC_MAX_UDP_TIMEOUT; - if (!timeparms.to_initval) - timeparms.to_initval = 11 * HZ / 10; - break; - default: - return -EINVAL; - } + nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); clp = nfs4_get_client(&server->addr.sin_addr); if (!clp) { @@ -1735,7 +1795,7 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, down_write(&clp->cl_sem); if (IS_ERR(clp->cl_rpcclient)) { - xprt = xprt_create_proto(proto, &server->addr, &timeparms); + xprt = xprt_create_proto(data->proto, &server->addr, &timeparms); if (IS_ERR(xprt)) { up_write(&clp->cl_sem); err = PTR_ERR(xprt); diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index d91b69044a4..59049e864ca 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -143,7 +143,6 @@ xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr) fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; fattr->rdev = 0; } - fattr->timestamp = jiffies; return p; } diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index edc95514046..92c870d19cc 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -78,7 +78,7 @@ nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("%s: call fsinfo\n", __FUNCTION__); - info->fattr->valid = 0; + nfs_fattr_init(info->fattr); status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status); if (!(info->fattr->valid & NFS_ATTR_FATTR)) { @@ -98,7 +98,7 @@ nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call getattr\n"); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(server->client, NFS3PROC_GETATTR, fhandle, fattr, 0); dprintk("NFS reply getattr: %d\n", status); @@ -117,7 +117,7 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, int status; dprintk("NFS call setattr\n"); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0); if (status == 0) nfs_setattr_update_inode(inode, sattr); @@ -143,8 +143,8 @@ nfs3_proc_lookup(struct inode *dir, struct qstr *name, int status; dprintk("NFS call lookup %s\n", name->name); - dir_attr.valid = 0; - fattr->valid = 0; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(fattr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0); if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR, @@ -174,7 +174,6 @@ static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) int status; dprintk("NFS call access\n"); - fattr.valid = 0; if (mode & MAY_READ) arg.access |= NFS3_ACCESS_READ; @@ -189,6 +188,7 @@ static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) if (mode & MAY_EXEC) arg.access |= NFS3_ACCESS_EXECUTE; } + nfs_fattr_init(&fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); nfs_refresh_inode(inode, &fattr); if (status == 0) { @@ -217,7 +217,7 @@ static int nfs3_proc_readlink(struct inode *inode, struct page *page, int status; dprintk("NFS call readlink\n"); - fattr.valid = 0; + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK, &args, &fattr, 0); nfs_refresh_inode(inode, &fattr); @@ -240,7 +240,7 @@ static int nfs3_proc_read(struct nfs_read_data *rdata) dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) nfs_refresh_inode(inode, fattr); @@ -263,10 +263,10 @@ static int nfs3_proc_write(struct nfs_write_data *wdata) dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags); if (status >= 0) - nfs_refresh_inode(inode, fattr); + nfs_post_op_update_inode(inode, fattr); dprintk("NFS reply write: %d\n", status); return status < 0? status : wdata->res.count; } @@ -285,10 +285,10 @@ static int nfs3_proc_commit(struct nfs_write_data *cdata) dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, (long long) cdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); if (status >= 0) - nfs_refresh_inode(inode, fattr); + nfs_post_op_update_inode(inode, fattr); dprintk("NFS reply commit: %d\n", status); return status; } @@ -299,7 +299,7 @@ static int nfs3_proc_commit(struct nfs_write_data *cdata) */ static int nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags) + int flags, struct nameidata *nd) { struct nfs_fh fhandle; struct nfs_fattr fattr; @@ -329,10 +329,10 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, sattr->ia_mode &= ~current->fs->umask; again: - dir_attr.valid = 0; - fattr.valid = 0; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); /* If the server doesn't support the exclusive creation semantics, * try again with simple 'guarded' mode. */ @@ -401,9 +401,9 @@ nfs3_proc_remove(struct inode *dir, struct qstr *name) int status; dprintk("NFS call remove %s\n", name->name); - dir_attr.valid = 0; + nfs_fattr_init(&dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply remove: %d\n", status); return status; } @@ -422,7 +422,7 @@ nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr ptr->arg.fh = NFS_FH(dir->d_inode); ptr->arg.name = name->name; ptr->arg.len = name->len; - ptr->res.valid = 0; + nfs_fattr_init(&ptr->res); msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; msg->rpc_argp = &ptr->arg; msg->rpc_resp = &ptr->res; @@ -439,7 +439,7 @@ nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task) return 1; if (msg->rpc_argp) { dir_attr = (struct nfs_fattr*)msg->rpc_resp; - nfs_refresh_inode(dir->d_inode, dir_attr); + nfs_post_op_update_inode(dir->d_inode, dir_attr); kfree(msg->rpc_argp); } return 0; @@ -465,11 +465,11 @@ nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name, int status; dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); - old_dir_attr.valid = 0; - new_dir_attr.valid = 0; + nfs_fattr_init(&old_dir_attr); + nfs_fattr_init(&new_dir_attr); status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0); - nfs_refresh_inode(old_dir, &old_dir_attr); - nfs_refresh_inode(new_dir, &new_dir_attr); + nfs_post_op_update_inode(old_dir, &old_dir_attr); + nfs_post_op_update_inode(new_dir, &new_dir_attr); dprintk("NFS reply rename: %d\n", status); return status; } @@ -491,11 +491,11 @@ nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) int status; dprintk("NFS call link %s\n", name->name); - dir_attr.valid = 0; - fattr.valid = 0; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0); - nfs_refresh_inode(dir, &dir_attr); - nfs_refresh_inode(inode, &fattr); + nfs_post_op_update_inode(dir, &dir_attr); + nfs_post_op_update_inode(inode, &fattr); dprintk("NFS reply link: %d\n", status); return status; } @@ -524,10 +524,10 @@ nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, if (path->len > NFS3_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s -> %s\n", name->name, path->name); - dir_attr.valid = 0; - fattr->valid = 0; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(fattr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply symlink: %d\n", status); return status; } @@ -552,13 +552,13 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) int status; dprintk("NFS call mkdir %s\n", dentry->d_name.name); - dir_attr.valid = 0; - fattr.valid = 0; sattr->ia_mode &= ~current->fs->umask; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; status = nfs_instantiate(dentry, &fhandle, &fattr); @@ -582,9 +582,9 @@ nfs3_proc_rmdir(struct inode *dir, struct qstr *name) int status; dprintk("NFS call rmdir %s\n", name->name); - dir_attr.valid = 0; + nfs_fattr_init(&dir_attr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); dprintk("NFS reply rmdir: %d\n", status); return status; } @@ -634,7 +634,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, dprintk("NFS call readdir%s %d\n", plus? "plus" : "", (unsigned int) cookie); - dir_attr.valid = 0; + nfs_fattr_init(&dir_attr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_refresh_inode(dir, &dir_attr); dprintk("NFS reply readdir: %d\n", status); @@ -676,10 +676,10 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, sattr->ia_mode &= ~current->fs->umask; - dir_attr.valid = 0; - fattr.valid = 0; + nfs_fattr_init(&dir_attr); + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0); - nfs_refresh_inode(dir, &dir_attr); + nfs_post_op_update_inode(dir, &dir_attr); if (status != 0) goto out; status = nfs_instantiate(dentry, &fh, &fattr); @@ -698,7 +698,7 @@ nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call fsstat\n"); - stat->fattr->valid = 0; + nfs_fattr_init(stat->fattr); status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0); dprintk("NFS reply statfs: %d\n", status); return status; @@ -711,7 +711,7 @@ nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call fsinfo\n"); - info->fattr->valid = 0; + nfs_fattr_init(info->fattr); status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0); dprintk("NFS reply fsinfo: %d\n", status); return status; @@ -724,7 +724,7 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call pathconf\n"); - info->fattr->valid = 0; + nfs_fattr_init(info->fattr); status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0); dprintk("NFS reply pathconf: %d\n", status); return status; @@ -735,7 +735,7 @@ extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int); static void nfs3_read_done(struct rpc_task *task) { - struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; + struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; if (nfs3_async_handle_jukebox(task)) return; @@ -775,7 +775,7 @@ nfs3_write_done(struct rpc_task *task) return; data = (struct nfs_write_data *)task->tk_calldata; if (task->tk_status >= 0) - nfs_refresh_inode(data->inode, data->res.fattr); + nfs_post_op_update_inode(data->inode, data->res.fattr); nfs_writeback_done(task); } @@ -819,7 +819,7 @@ nfs3_commit_done(struct rpc_task *task) return; data = (struct nfs_write_data *)task->tk_calldata; if (task->tk_status >= 0) - nfs_refresh_inode(data->inode, data->res.fattr); + nfs_post_op_update_inode(data->inode, data->res.fattr); nfs_commit_done(task); } diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index db4a904810a..0498bd36602 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -174,7 +174,6 @@ xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr) /* Update the mode bits */ fattr->valid |= (NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3); - fattr->timestamp = jiffies; return p; } diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index ec1a22d7b87..78a53f5a9f1 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -93,25 +93,50 @@ struct nfs4_client { }; /* + * 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 */ +}; + +#define NFS_SEQID_CONFIRMED 1 +struct nfs_seqid_counter { + struct rpc_sequence *sequence; + int flags; + u32 counter; +}; + +struct nfs_seqid { + struct nfs_seqid_counter *sequence; + struct list_head list; +}; + +static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) +{ + if (seqid_mutating_err(-status)) + seqid->flags |= NFS_SEQID_CONFIRMED; +} + +/* * 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. - * - * The ->so_sema is held during all state_owner seqid-mutating operations: - * OPEN, OPEN_DOWNGRADE, and CLOSE. Its purpose is to properly serialize - * so_seqid. */ struct nfs4_state_owner { + spinlock_t so_lock; struct list_head so_list; /* per-clientid list of state_owners */ struct nfs4_client *so_client; u32 so_id; /* 32-bit identifier, unique */ - struct semaphore so_sema; - u32 so_seqid; /* protected by so_sema */ atomic_t so_count; struct rpc_cred *so_cred; /* Associated cred */ struct list_head so_states; struct list_head so_delegations; + struct nfs_seqid_counter so_seqid; + struct rpc_sequence so_sequence; }; /* @@ -132,7 +157,7 @@ struct nfs4_lock_state { fl_owner_t ls_owner; /* POSIX lock owner */ #define NFS_LOCK_INITIALIZED 1 int ls_flags; - u32 ls_seqid; + struct nfs_seqid_counter ls_seqid; u32 ls_id; nfs4_stateid ls_stateid; atomic_t ls_count; @@ -153,7 +178,6 @@ struct nfs4_state { struct inode *inode; /* Pointer to the inode */ unsigned long flags; /* Do we hold any locks? */ - struct semaphore lock_sema; /* Serializes file locking operations */ spinlock_t state_lock; /* Protects the lock_states list */ nfs4_stateid stateid; @@ -191,8 +215,8 @@ extern int nfs4_proc_setclientid_confirm(struct nfs4_client *); extern int nfs4_proc_async_renew(struct nfs4_client *); extern int nfs4_proc_renew(struct nfs4_client *); extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode); -extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *); -extern int nfs4_open_revalidate(struct inode *, struct dentry *, int); +extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *); +extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *); extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops; extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops; @@ -224,12 +248,17 @@ extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state extern void nfs4_put_open_state(struct nfs4_state *); extern void nfs4_close_state(struct nfs4_state *, mode_t); extern struct nfs4_state *nfs4_find_state(struct inode *, struct rpc_cred *, mode_t mode); -extern void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp); extern void nfs4_schedule_state_recovery(struct nfs4_client *); +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_increment_lock_seqid(int status, struct nfs4_lock_state *ls); extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t); +extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter); +extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); +extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); +extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); +extern void nfs_free_seqid(struct nfs_seqid *seqid); + extern const nfs4_stateid zero_stateid; /* nfs4xdr.c */ diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 9701ca8c942..933e13b383f 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -47,6 +47,7 @@ #include <linux/nfs_page.h> #include <linux/smp_lock.h> #include <linux/namei.h> +#include <linux/mount.h> #include "nfs4_fs.h" #include "delegation.h" @@ -56,10 +57,11 @@ #define NFS4_POLL_RETRY_MIN (1*HZ) #define NFS4_POLL_RETRY_MAX (15*HZ) +static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid); static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); -static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *); +static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); -static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception); +static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); extern struct rpc_procinfo nfs4_procedures[]; @@ -185,8 +187,26 @@ static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinf { struct nfs_inode *nfsi = NFS_I(inode); + spin_lock(&inode->i_lock); + nfsi->cache_validity |= NFS_INO_INVALID_ATTR; if (cinfo->before == nfsi->change_attr && cinfo->atomic) nfsi->change_attr = cinfo->after; + spin_unlock(&inode->i_lock); +} + +/* Helper for asynchronous RPC calls */ +static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin, + rpc_action tk_exit, void *calldata) +{ + struct rpc_task *task; + + if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC))) + return -ENOMEM; + + task->tk_calldata = calldata; + task->tk_action = tk_begin; + rpc_execute(task); + return 0; } static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) @@ -195,6 +215,7 @@ static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, open_flags &= (FMODE_READ|FMODE_WRITE); /* Protect against nfs4_find_state() */ + spin_lock(&state->owner->so_lock); spin_lock(&inode->i_lock); state->state |= open_flags; /* NB! List reordering - see the reclaim code for why. */ @@ -204,12 +225,12 @@ static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, state->nreaders++; memcpy(&state->stateid, stateid, sizeof(state->stateid)); spin_unlock(&inode->i_lock); + spin_unlock(&state->owner->so_lock); } /* * OPEN_RECLAIM: * reclaim state on the server after a reboot. - * Assumes caller is holding the sp->so_sem */ static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) { @@ -218,7 +239,6 @@ static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *st struct nfs_delegation *delegation = NFS_I(inode)->delegation; struct nfs_openargs o_arg = { .fh = NFS_FH(inode), - .seqid = sp->so_seqid, .id = sp->so_id, .open_flags = state->state, .clientid = server->nfs4_state->cl_clientid, @@ -245,8 +265,13 @@ static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *st } o_arg.u.delegation_type = delegation->type; } + o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); + if (o_arg.seqid == NULL) + return -ENOMEM; status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - nfs4_increment_seqid(status, sp); + /* Confirm the sequence as being established */ + nfs_confirm_seqid(&sp->so_seqid, status); + nfs_increment_open_seqid(status, o_arg.seqid); if (status == 0) { memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); if (o_res.delegation_type != 0) { @@ -256,6 +281,7 @@ static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *st nfs_async_inode_return_delegation(inode, &o_res.stateid); } } + nfs_free_seqid(o_arg.seqid); clear_bit(NFS_DELEGATED_STATE, &state->flags); /* Ensure we update the inode attributes */ NFS_CACHEINV(inode); @@ -302,23 +328,35 @@ static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state }; int status = 0; - down(&sp->so_sema); if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) goto out; if (state->state == 0) goto out; - arg.seqid = sp->so_seqid; + arg.seqid = nfs_alloc_seqid(&sp->so_seqid); + status = -ENOMEM; + if (arg.seqid == NULL) + goto out; arg.open_flags = state->state; memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data)); status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - nfs4_increment_seqid(status, sp); + nfs_increment_open_seqid(status, arg.seqid); + if (status != 0) + goto out_free; + if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) { + status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode), + sp, &res.stateid, arg.seqid); + if (status != 0) + goto out_free; + } + nfs_confirm_seqid(&sp->so_seqid, 0); if (status >= 0) { memcpy(state->stateid.data, res.stateid.data, sizeof(state->stateid.data)); clear_bit(NFS_DELEGATED_STATE, &state->flags); } +out_free: + nfs_free_seqid(arg.seqid); out: - up(&sp->so_sema); dput(parent); return status; } @@ -345,11 +383,11 @@ int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) return err; } -static inline int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid) +static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid) { struct nfs_open_confirmargs arg = { .fh = fh, - .seqid = sp->so_seqid, + .seqid = seqid, .stateid = *stateid, }; struct nfs_open_confirmres res; @@ -362,7 +400,9 @@ static inline int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nf int status; status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR); - nfs4_increment_seqid(status, sp); + /* Confirm the sequence as being established */ + nfs_confirm_seqid(&sp->so_seqid, status); + nfs_increment_open_seqid(status, seqid); if (status >= 0) memcpy(stateid, &res.stateid, sizeof(*stateid)); return status; @@ -380,21 +420,41 @@ static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, stru int status; /* Update sequence id. The caller must serialize! */ - o_arg->seqid = sp->so_seqid; o_arg->id = sp->so_id; o_arg->clientid = sp->so_client->cl_clientid; status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - nfs4_increment_seqid(status, sp); + if (status == 0) { + /* OPEN on anything except a regular file is disallowed in NFSv4 */ + switch (o_res->f_attr->mode & S_IFMT) { + case S_IFREG: + break; + case S_IFLNK: + status = -ELOOP; + break; + case S_IFDIR: + status = -EISDIR; + break; + default: + status = -ENOTDIR; + } + } + + nfs_increment_open_seqid(status, o_arg->seqid); if (status != 0) goto out; - update_changeattr(dir, &o_res->cinfo); + 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_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { status = _nfs4_proc_open_confirm(server->client, &o_res->fh, - sp, &o_res->stateid); + sp, &o_res->stateid, o_arg->seqid); if (status != 0) goto out; } + nfs_confirm_seqid(&sp->so_seqid, 0); if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); out: @@ -441,9 +501,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st struct inode *inode = state->inode; struct nfs_server *server = NFS_SERVER(dir); struct nfs_delegation *delegation = NFS_I(inode)->delegation; - struct nfs_fattr f_attr = { - .valid = 0, - }; + struct nfs_fattr f_attr, dir_attr; struct nfs_openargs o_arg = { .fh = NFS_FH(dir), .open_flags = state->state, @@ -453,6 +511,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st }; struct nfs_openres o_res = { .f_attr = &f_attr, + .dir_attr = &dir_attr, .server = server, }; int status = 0; @@ -465,6 +524,12 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st set_bit(NFS_DELEGATED_STATE, &state->flags); goto out; } + o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); + status = -ENOMEM; + if (o_arg.seqid == NULL) + goto out; + nfs_fattr_init(&f_attr); + nfs_fattr_init(&dir_attr); status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); if (status != 0) goto out_nodeleg; @@ -490,6 +555,7 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); } out_nodeleg: + nfs_free_seqid(o_arg.seqid); clear_bit(NFS_DELEGATED_STATE, &state->flags); out: dput(parent); @@ -564,7 +630,6 @@ static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); goto out_err; } - down(&sp->so_sema); state = nfs4_get_open_state(inode, sp); if (state == NULL) goto out_err; @@ -589,7 +654,6 @@ static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred set_bit(NFS_DELEGATED_STATE, &state->flags); update_open_stateid(state, &delegation->stateid, open_flags); out_ok: - up(&sp->so_sema); nfs4_put_state_owner(sp); up_read(&nfsi->rwsem); up_read(&clp->cl_sem); @@ -600,11 +664,12 @@ out_err: if (sp != NULL) { if (state != NULL) nfs4_put_open_state(state); - up(&sp->so_sema); nfs4_put_state_owner(sp); } up_read(&nfsi->rwsem); up_read(&clp->cl_sem); + if (err != -EACCES) + nfs_inode_return_delegation(inode); return err; } @@ -635,9 +700,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st struct nfs4_client *clp = server->nfs4_state; struct inode *inode = NULL; int status; - struct nfs_fattr f_attr = { - .valid = 0, - }; + struct nfs_fattr f_attr, dir_attr; struct nfs_openargs o_arg = { .fh = NFS_FH(dir), .open_flags = flags, @@ -648,6 +711,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st }; struct nfs_openres o_res = { .f_attr = &f_attr, + .dir_attr = &dir_attr, .server = server, }; @@ -665,8 +729,12 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st } else o_arg.u.attrs = sattr; /* Serialization for the sequence id */ - down(&sp->so_sema); + o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); + if (o_arg.seqid == NULL) + return -ENOMEM; + nfs_fattr_init(&f_attr); + nfs_fattr_init(&dir_attr); status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); if (status != 0) goto out_err; @@ -681,7 +749,7 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st update_open_stateid(state, &o_res.stateid, flags); if (o_res.delegation_type != 0) nfs_inode_set_delegation(inode, cred, &o_res); - up(&sp->so_sema); + nfs_free_seqid(o_arg.seqid); nfs4_put_state_owner(sp); up_read(&clp->cl_sem); *res = state; @@ -690,7 +758,7 @@ out_err: if (sp != NULL) { if (state != NULL) nfs4_put_open_state(state); - up(&sp->so_sema); + nfs_free_seqid(o_arg.seqid); nfs4_put_state_owner(sp); } /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ @@ -718,7 +786,7 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, * It is actually a sign of a bug on the client or on the server. * * If we receive a BAD_SEQID error in the particular case of - * doing an OPEN, we assume that nfs4_increment_seqid() will + * doing an OPEN, we assume that nfs_increment_open_seqid() will * have unhashed the old state_owner for us, and that we can * therefore safely retry using a new one. We should still warn * the user though... @@ -728,6 +796,16 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, exception.retry = 1; continue; } + /* + * BAD_STATEID on OPEN means that the server cancelled our + * state before it received the OPEN_CONFIRM. + * Recover by retrying the request as per the discussion + * on Page 181 of RFC3530. + */ + if (status == -NFS4ERR_BAD_STATEID) { + exception.retry = 1; + continue; + } res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), status, &exception)); } while (exception.retry); @@ -755,7 +833,7 @@ static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, }; int status; - fattr->valid = 0; + nfs_fattr_init(fattr); if (state != NULL) { msg.rpc_cred = state->owner->so_cred; @@ -787,19 +865,30 @@ struct nfs4_closedata { struct nfs4_state *state; struct nfs_closeargs arg; struct nfs_closeres res; + struct nfs_fattr fattr; }; +static void nfs4_free_closedata(struct nfs4_closedata *calldata) +{ + struct nfs4_state *state = calldata->state; + struct nfs4_state_owner *sp = state->owner; + + nfs4_put_open_state(calldata->state); + nfs_free_seqid(calldata->arg.seqid); + nfs4_put_state_owner(sp); + kfree(calldata); +} + static void nfs4_close_done(struct rpc_task *task) { struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; struct nfs4_state *state = calldata->state; - struct nfs4_state_owner *sp = state->owner; struct nfs_server *server = NFS_SERVER(calldata->inode); /* hmm. we are done with the inode, and in the process of freeing * the state_owner. we keep this around to process errors */ - nfs4_increment_seqid(task->tk_status, sp); + nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); switch (task->tk_status) { case 0: memcpy(&state->stateid, &calldata->res.stateid, @@ -816,25 +905,49 @@ static void nfs4_close_done(struct rpc_task *task) return; } } + nfs_refresh_inode(calldata->inode, calldata->res.fattr); state->state = calldata->arg.open_flags; - nfs4_put_open_state(state); - up(&sp->so_sema); - nfs4_put_state_owner(sp); - up_read(&server->nfs4_state->cl_sem); - kfree(calldata); + nfs4_free_closedata(calldata); } -static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata) +static void nfs4_close_begin(struct rpc_task *task) { + struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; + struct nfs4_state *state = calldata->state; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], .rpc_argp = &calldata->arg, .rpc_resp = &calldata->res, - .rpc_cred = calldata->state->owner->so_cred, + .rpc_cred = state->owner->so_cred, }; - if (calldata->arg.open_flags != 0) + int mode = 0; + int status; + + status = nfs_wait_on_sequence(calldata->arg.seqid, task); + if (status != 0) + return; + /* Don't reorder reads */ + smp_rmb(); + /* Recalculate the new open mode in case someone reopened the file + * while we were waiting in line to be scheduled. + */ + if (state->nreaders != 0) + mode |= FMODE_READ; + if (state->nwriters != 0) + mode |= FMODE_WRITE; + if (test_bit(NFS_DELEGATED_STATE, &state->flags)) + state->state = mode; + if (mode == state->state) { + nfs4_free_closedata(calldata); + task->tk_exit = NULL; + rpc_exit(task, 0); + return; + } + nfs_fattr_init(calldata->res.fattr); + if (mode != 0) msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; - return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata); + calldata->arg.open_flags = mode; + rpc_call_setup(task, &msg, 0); } /* @@ -850,40 +963,57 @@ static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata * */ int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode) { + struct nfs_server *server = NFS_SERVER(inode); struct nfs4_closedata *calldata; - int status; + int status = -ENOMEM; - /* Tell caller we're done */ - if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { - state->state = mode; - return 0; - } - calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL); + calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); if (calldata == NULL) - return -ENOMEM; + goto out; calldata->inode = inode; calldata->state = state; calldata->arg.fh = NFS_FH(inode); + calldata->arg.stateid = &state->stateid; /* Serialization for the sequence id */ - calldata->arg.seqid = state->owner->so_seqid; - calldata->arg.open_flags = mode; - memcpy(&calldata->arg.stateid, &state->stateid, - sizeof(calldata->arg.stateid)); - status = nfs4_close_call(NFS_SERVER(inode)->client, calldata); - /* - * Return -EINPROGRESS on success in order to indicate to the - * caller that an asynchronous RPC call has been launched, and - * that it will release the semaphores on completion. - */ - return (status == 0) ? -EINPROGRESS : status; + calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); + if (calldata->arg.seqid == NULL) + goto out_free_calldata; + calldata->arg.bitmask = server->attr_bitmask; + calldata->res.fattr = &calldata->fattr; + calldata->res.server = server; + + status = nfs4_call_async(server->client, nfs4_close_begin, + nfs4_close_done, calldata); + if (status == 0) + goto out; + + nfs_free_seqid(calldata->arg.seqid); +out_free_calldata: + kfree(calldata); +out: + return status; } -struct inode * +static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) +{ + struct file *filp; + + filp = lookup_instantiate_filp(nd, dentry, NULL); + if (!IS_ERR(filp)) { + struct nfs_open_context *ctx; + ctx = (struct nfs_open_context *)filp->private_data; + ctx->state = state; + } else + nfs4_close_state(state, nd->intent.open.flags); +} + +struct dentry * nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { struct iattr attr; struct rpc_cred *cred; struct nfs4_state *state; + struct dentry *res; if (nd->flags & LOOKUP_CREATE) { attr.ia_mode = nd->intent.open.create_mode; @@ -897,16 +1027,23 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); if (IS_ERR(cred)) - return (struct inode *)cred; + return (struct dentry *)cred; state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); put_rpccred(cred); - if (IS_ERR(state)) - return (struct inode *)state; - return state->inode; + if (IS_ERR(state)) { + if (PTR_ERR(state) == -ENOENT) + d_add(dentry, NULL); + return (struct dentry *)state; + } + res = d_add_unique(dentry, state->inode); + if (res != NULL) + dentry = res; + nfs4_intent_set_file(nd, dentry, state); + return res; } int -nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags) +nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) { struct rpc_cred *cred; struct nfs4_state *state; @@ -919,18 +1056,30 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags) if (IS_ERR(state)) state = nfs4_do_open(dir, dentry, openflags, NULL, cred); put_rpccred(cred); - if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0) - return 1; - if (IS_ERR(state)) - return 0; + if (IS_ERR(state)) { + switch (PTR_ERR(state)) { + case -EPERM: + case -EACCES: + case -EDQUOT: + case -ENOSPC: + case -EROFS: + lookup_instantiate_filp(nd, (struct dentry *)state, NULL); + return 1; + case -ENOENT: + if (dentry->d_inode == NULL) + return 1; + } + goto out_drop; + } inode = state->inode; + iput(inode); if (inode == dentry->d_inode) { - iput(inode); + nfs4_intent_set_file(nd, dentry, state); return 1; } - d_drop(dentry); nfs4_close_state(state, openflags); - iput(inode); +out_drop: + d_drop(dentry); return 0; } @@ -974,13 +1123,12 @@ static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fh static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { - struct nfs_fattr * fattr = info->fattr; struct nfs4_lookup_root_arg args = { .bitmask = nfs4_fattr_bitmap, }; struct nfs4_lookup_res res = { .server = server, - .fattr = fattr, + .fattr = info->fattr, .fh = fhandle, }; struct rpc_message msg = { @@ -988,7 +1136,7 @@ static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_argp = &args, .rpc_resp = &res, }; - fattr->valid = 0; + nfs_fattr_init(info->fattr); return rpc_call_sync(server->client, &msg, 0); } @@ -1051,7 +1199,7 @@ static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, q.len = p - q.name; do { - fattr->valid = 0; + nfs_fattr_init(fattr); status = nfs4_handle_exception(server, rpc_call_sync(server->client, &msg, 0), &exception); @@ -1088,7 +1236,7 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = &res, }; - fattr->valid = 0; + nfs_fattr_init(fattr); return rpc_call_sync(server->client, &msg, 0); } @@ -1130,7 +1278,7 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, struct nfs4_state *state; int status; - fattr->valid = 0; + nfs_fattr_init(fattr); cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); if (IS_ERR(cred)) @@ -1176,7 +1324,7 @@ static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, .rpc_resp = &res, }; - fattr->valid = 0; + nfs_fattr_init(fattr); dprintk("NFS call lookup %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); @@ -1325,7 +1473,7 @@ static int _nfs4_proc_read(struct nfs_read_data *rdata) dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(server->client, &msg, flags); if (!status) renew_lease(server, timestamp); @@ -1362,7 +1510,7 @@ static int _nfs4_proc_write(struct nfs_write_data *wdata) dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(server->client, &msg, rpcflags); dprintk("NFS reply write: %d\n", status); return status; @@ -1396,7 +1544,7 @@ static int _nfs4_proc_commit(struct nfs_write_data *cdata) dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, (long long) cdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(server->client, &msg, 0); dprintk("NFS reply commit: %d\n", status); return status; @@ -1431,7 +1579,7 @@ static int nfs4_proc_commit(struct nfs_write_data *cdata) static int nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags) + int flags, struct nameidata *nd) { struct nfs4_state *state; struct rpc_cred *cred; @@ -1453,24 +1601,30 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, struct nfs_fattr fattr; status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, NFS_FH(state->inode), sattr, state); - if (status == 0) { + if (status == 0) nfs_setattr_update_inode(state->inode, sattr); - goto out; - } - } else if (flags != 0) - goto out; - nfs4_close_state(state, flags); + } + if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) + nfs4_intent_set_file(nd, dentry, state); + else + nfs4_close_state(state, flags); out: return status; } static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) { + struct nfs_server *server = NFS_SERVER(dir); struct nfs4_remove_arg args = { .fh = NFS_FH(dir), .name = name, + .bitmask = server->attr_bitmask, + }; + struct nfs_fattr dir_attr; + struct nfs4_remove_res res = { + .server = server, + .dir_attr = &dir_attr, }; - struct nfs4_change_info res; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], .rpc_argp = &args, @@ -1478,9 +1632,12 @@ static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) }; int status; - status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); - if (status == 0) - update_changeattr(dir, &res); + nfs_fattr_init(res.dir_attr); + status = rpc_call_sync(server->client, &msg, 0); + if (status == 0) { + update_changeattr(dir, &res.cinfo); + nfs_post_op_update_inode(dir, res.dir_attr); + } return status; } @@ -1498,12 +1655,14 @@ static int nfs4_proc_remove(struct inode *dir, struct qstr *name) struct unlink_desc { struct nfs4_remove_arg args; - struct nfs4_change_info res; + struct nfs4_remove_res res; + struct nfs_fattr dir_attr; }; static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name) { + struct nfs_server *server = NFS_SERVER(dir->d_inode); struct unlink_desc *up; up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); @@ -1512,6 +1671,9 @@ static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, up->args.fh = NFS_FH(dir->d_inode); up->args.name = name; + up->args.bitmask = server->attr_bitmask; + up->res.server = server; + up->res.dir_attr = &up->dir_attr; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; msg->rpc_argp = &up->args; @@ -1526,7 +1688,8 @@ static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) if (msg->rpc_resp != NULL) { up = container_of(msg->rpc_resp, struct unlink_desc, res); - update_changeattr(dir->d_inode, &up->res); + update_changeattr(dir->d_inode, &up->res.cinfo); + nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); kfree(up); msg->rpc_resp = NULL; msg->rpc_argp = NULL; @@ -1537,13 +1700,20 @@ static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) 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 nfs4_rename_arg 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_fattr old_fattr, new_fattr; + struct nfs4_rename_res res = { + .server = server, + .old_fattr = &old_fattr, + .new_fattr = &new_fattr, }; - struct nfs4_rename_res res = { }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], .rpc_argp = &arg, @@ -1551,11 +1721,15 @@ static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, }; int status; - status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); + nfs_fattr_init(res.old_fattr); + nfs_fattr_init(res.new_fattr); + status = rpc_call_sync(server->client, &msg, 0); 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); } return status; } @@ -1576,22 +1750,34 @@ static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) { + struct nfs_server *server = NFS_SERVER(inode); struct nfs4_link_arg arg = { .fh = NFS_FH(inode), .dir_fh = NFS_FH(dir), .name = name, + .bitmask = server->attr_bitmask, + }; + struct nfs_fattr fattr, dir_attr; + struct nfs4_link_res res = { + .server = server, + .fattr = &fattr, + .dir_attr = &dir_attr, }; - struct nfs4_change_info cinfo = { }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], .rpc_argp = &arg, - .rpc_resp = &cinfo, + .rpc_resp = &res, }; int status; - status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); - if (!status) - update_changeattr(dir, &cinfo); + nfs_fattr_init(res.fattr); + nfs_fattr_init(res.dir_attr); + status = rpc_call_sync(server->client, &msg, 0); + if (!status) { + update_changeattr(dir, &res.cinfo); + nfs_post_op_update_inode(dir, res.dir_attr); + nfs_refresh_inode(inode, res.fattr); + } return status; } @@ -1613,6 +1799,7 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr) { struct nfs_server *server = NFS_SERVER(dir); + struct nfs_fattr dir_fattr; struct nfs4_create_arg arg = { .dir_fh = NFS_FH(dir), .server = server, @@ -1625,6 +1812,7 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, .server = server, .fh = fhandle, .fattr = fattr, + .dir_fattr = &dir_fattr, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], @@ -1636,11 +1824,13 @@ static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, if (path->len > NFS4_MAXPATHLEN) return -ENAMETOOLONG; arg.u.symlink = path; - fattr->valid = 0; + nfs_fattr_init(fattr); + nfs_fattr_init(&dir_fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); if (!status) update_changeattr(dir, &res.dir_cinfo); + nfs_post_op_update_inode(dir, res.dir_fattr); return status; } @@ -1664,7 +1854,7 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, { struct nfs_server *server = NFS_SERVER(dir); struct nfs_fh fhandle; - struct nfs_fattr fattr; + struct nfs_fattr fattr, dir_fattr; struct nfs4_create_arg arg = { .dir_fh = NFS_FH(dir), .server = server, @@ -1677,6 +1867,7 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, .server = server, .fh = &fhandle, .fattr = &fattr, + .dir_fattr = &dir_fattr, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], @@ -1685,11 +1876,13 @@ static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, }; int status; - fattr.valid = 0; + nfs_fattr_init(&fattr); + nfs_fattr_init(&dir_fattr); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); if (!status) { update_changeattr(dir, &res.dir_cinfo); + nfs_post_op_update_inode(dir, res.dir_fattr); status = nfs_instantiate(dentry, &fhandle, &fattr); } return status; @@ -1762,7 +1955,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, { struct nfs_server *server = NFS_SERVER(dir); struct nfs_fh fh; - struct nfs_fattr fattr; + struct nfs_fattr fattr, dir_fattr; struct nfs4_create_arg arg = { .dir_fh = NFS_FH(dir), .server = server, @@ -1774,6 +1967,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, .server = server, .fh = &fh, .fattr = &fattr, + .dir_fattr = &dir_fattr, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], @@ -1783,7 +1977,8 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, int status; int mode = sattr->ia_mode; - fattr.valid = 0; + nfs_fattr_init(&fattr); + nfs_fattr_init(&dir_fattr); BUG_ON(!(sattr->ia_valid & ATTR_MODE)); BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); @@ -1805,6 +2000,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); if (status == 0) { update_changeattr(dir, &res.dir_cinfo); + nfs_post_op_update_inode(dir, res.dir_fattr); status = nfs_instantiate(dentry, &fh, &fattr); } return status; @@ -1836,7 +2032,7 @@ static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = fsstat, }; - fsstat->fattr->valid = 0; + nfs_fattr_init(fsstat->fattr); return rpc_call_sync(server->client, &msg, 0); } @@ -1883,7 +2079,7 @@ static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, str static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) { - fsinfo->fattr->valid = 0; + nfs_fattr_init(fsinfo->fattr); return nfs4_do_fsinfo(server, fhandle, fsinfo); } @@ -1906,7 +2102,7 @@ static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle return 0; } - pathconf->fattr->valid = 0; + nfs_fattr_init(pathconf->fattr); return rpc_call_sync(server->client, &msg, 0); } @@ -1973,8 +2169,10 @@ nfs4_write_done(struct rpc_task *task) rpc_restart_call(task); return; } - if (task->tk_status >= 0) + if (task->tk_status >= 0) { renew_lease(NFS_SERVER(inode), data->timestamp); + nfs_post_op_update_inode(inode, data->res.fattr); + } /* Call back common NFS writeback processing */ nfs_writeback_done(task); } @@ -1990,6 +2188,7 @@ nfs4_proc_write_setup(struct nfs_write_data *data, int how) .rpc_cred = data->cred, }; struct inode *inode = data->inode; + struct nfs_server *server = NFS_SERVER(inode); int stable; int flags; @@ -2001,6 +2200,8 @@ nfs4_proc_write_setup(struct nfs_write_data *data, int how) } else stable = NFS_UNSTABLE; data->args.stable = stable; + data->args.bitmask = server->attr_bitmask; + data->res.server = server; data->timestamp = jiffies; @@ -2022,6 +2223,8 @@ nfs4_commit_done(struct rpc_task *task) rpc_restart_call(task); return; } + if (task->tk_status >= 0) + nfs_post_op_update_inode(inode, data->res.fattr); /* Call back common NFS writeback processing */ nfs_commit_done(task); } @@ -2037,8 +2240,12 @@ nfs4_proc_commit_setup(struct nfs_write_data *data, int how) .rpc_cred = data->cred, }; struct inode *inode = data->inode; + struct nfs_server *server = NFS_SERVER(inode); int flags; + data->args.bitmask = server->attr_bitmask; + data->res.server = server; + /* Set the initial flags for the task. */ flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; @@ -2106,65 +2313,6 @@ nfs4_proc_renew(struct nfs4_client *clp) return 0; } -/* - * We will need to arrange for the VFS layer to provide an atomic open. - * Until then, this open method is prone to inefficiency and race conditions - * due to the lookup, potential create, and open VFS calls from sys_open() - * placed on the wire. - */ -static int -nfs4_proc_file_open(struct inode *inode, struct file *filp) -{ - struct dentry *dentry = filp->f_dentry; - struct nfs_open_context *ctx; - struct nfs4_state *state = NULL; - struct rpc_cred *cred; - int status = -ENOMEM; - - dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n", - (int)dentry->d_parent->d_name.len, - dentry->d_parent->d_name.name, - (int)dentry->d_name.len, dentry->d_name.name); - - - /* Find our open stateid */ - cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); - if (IS_ERR(cred)) - return PTR_ERR(cred); - ctx = alloc_nfs_open_context(dentry, cred); - put_rpccred(cred); - if (unlikely(ctx == NULL)) - return -ENOMEM; - status = -EIO; /* ERACE actually */ - state = nfs4_find_state(inode, cred, filp->f_mode); - if (unlikely(state == NULL)) - goto no_state; - ctx->state = state; - nfs4_close_state(state, filp->f_mode); - ctx->mode = filp->f_mode; - nfs_file_set_open_context(filp, ctx); - put_nfs_open_context(ctx); - if (filp->f_mode & FMODE_WRITE) - nfs_begin_data_update(inode); - return 0; -no_state: - printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__); - put_nfs_open_context(ctx); - return status; -} - -/* - * Release our state - */ -static int -nfs4_proc_file_release(struct inode *inode, struct file *filp) -{ - if (filp->f_mode & FMODE_WRITE) - nfs_end_data_update(inode); - nfs_file_clear_open_context(filp); - return 0; -} - static inline int nfs4_server_supports_acls(struct nfs_server *server) { return (server->caps & NFS_CAP_ACLS) @@ -2285,7 +2433,7 @@ static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size return -ENOMEM; args.acl_pages[0] = localpage; args.acl_pgbase = 0; - args.acl_len = PAGE_SIZE; + resp_len = args.acl_len = PAGE_SIZE; } else { resp_buf = buf; buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); @@ -2345,6 +2493,7 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen 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 = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); if (ret == 0) @@ -2353,7 +2502,7 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen } static int -nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server) +nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) { struct nfs4_client *clp = server->nfs4_state; @@ -2431,7 +2580,7 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) /* This is the error handling routine for processes that are allowed * to sleep. */ -int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) +int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) { struct nfs4_client *clp = server->nfs4_state; int ret = errorcode; @@ -2632,7 +2781,6 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock down_read(&clp->cl_sem); nlo.clientid = clp->cl_clientid; - down(&state->lock_sema); status = nfs4_set_lock_state(state, request); if (status != 0) goto out; @@ -2659,7 +2807,6 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock status = 0; } out: - up(&state->lock_sema); up_read(&clp->cl_sem); return status; } @@ -2696,79 +2843,149 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl) return res; } -static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) +struct nfs4_unlockdata { + struct nfs_lockargs arg; + struct nfs_locku_opargs luargs; + struct nfs_lockres res; + struct nfs4_lock_state *lsp; + struct nfs_open_context *ctx; + atomic_t refcount; + struct completion completion; +}; + +static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata) { - struct inode *inode = state->inode; - struct nfs_server *server = NFS_SERVER(inode); - struct nfs4_client *clp = server->nfs4_state; - struct nfs_lockargs arg = { - .fh = NFS_FH(inode), - .type = nfs4_lck_type(cmd, request), - .offset = request->fl_start, - .length = nfs4_lck_length(request), - }; - struct nfs_lockres res = { - .server = server, - }; + if (atomic_dec_and_test(&calldata->refcount)) { + nfs_free_seqid(calldata->luargs.seqid); + nfs4_put_lock_state(calldata->lsp); + put_nfs_open_context(calldata->ctx); + kfree(calldata); + } +} + +static void nfs4_locku_complete(struct nfs4_unlockdata *calldata) +{ + complete(&calldata->completion); + nfs4_locku_release_calldata(calldata); +} + +static void nfs4_locku_done(struct rpc_task *task) +{ + struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; + + nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); + switch (task->tk_status) { + case 0: + memcpy(calldata->lsp->ls_stateid.data, + calldata->res.u.stateid.data, + sizeof(calldata->lsp->ls_stateid.data)); + break; + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_EXPIRED: + nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); + break; + default: + if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { + rpc_restart_call(task); + return; + } + } + nfs4_locku_complete(calldata); +} + +static void nfs4_locku_begin(struct rpc_task *task) +{ + struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], - .rpc_argp = &arg, - .rpc_resp = &res, - .rpc_cred = state->owner->so_cred, + .rpc_argp = &calldata->arg, + .rpc_resp = &calldata->res, + .rpc_cred = calldata->lsp->ls_state->owner->so_cred, }; + int status; + + status = nfs_wait_on_sequence(calldata->luargs.seqid, task); + if (status != 0) + return; + if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { + nfs4_locku_complete(calldata); + task->tk_exit = NULL; + rpc_exit(task, 0); + return; + } + rpc_call_setup(task, &msg, 0); +} + +static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) +{ + struct nfs4_unlockdata *calldata; + struct inode *inode = state->inode; + struct nfs_server *server = NFS_SERVER(inode); struct nfs4_lock_state *lsp; - struct nfs_locku_opargs luargs; int status; - - down_read(&clp->cl_sem); - down(&state->lock_sema); + status = nfs4_set_lock_state(state, request); if (status != 0) - goto out; + return status; lsp = request->fl_u.nfs4_fl.owner; /* We might have lost the locks! */ if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) - goto out; - luargs.seqid = lsp->ls_seqid; - memcpy(&luargs.stateid, &lsp->ls_stateid, sizeof(luargs.stateid)); - arg.u.locku = &luargs; - status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - nfs4_increment_lock_seqid(status, lsp); - - if (status == 0) - memcpy(&lsp->ls_stateid, &res.u.stateid, - sizeof(lsp->ls_stateid)); -out: - up(&state->lock_sema); + return 0; + calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); + if (calldata == NULL) + return -ENOMEM; + calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); + if (calldata->luargs.seqid == NULL) { + kfree(calldata); + return -ENOMEM; + } + calldata->luargs.stateid = &lsp->ls_stateid; + calldata->arg.fh = NFS_FH(inode); + calldata->arg.type = nfs4_lck_type(cmd, request); + calldata->arg.offset = request->fl_start; + calldata->arg.length = nfs4_lck_length(request); + calldata->arg.u.locku = &calldata->luargs; + calldata->res.server = server; + calldata->lsp = lsp; + atomic_inc(&lsp->ls_count); + + /* Ensure we don't close file until we're done freeing locks! */ + calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); + + atomic_set(&calldata->refcount, 2); + init_completion(&calldata->completion); + + status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin, + nfs4_locku_done, calldata); if (status == 0) - do_vfs_lock(request->fl_file, request); - up_read(&clp->cl_sem); + wait_for_completion_interruptible(&calldata->completion); + do_vfs_lock(request->fl_file, request); + nfs4_locku_release_calldata(calldata); return status; } -static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) -{ - struct nfs4_exception exception = { }; - int err; - - do { - err = nfs4_handle_exception(NFS_SERVER(state->inode), - _nfs4_proc_unlck(state, cmd, request), - &exception); - } while (exception.retry); - return err; -} - static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim) { struct inode *inode = state->inode; struct nfs_server *server = NFS_SERVER(inode); struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; + struct nfs_lock_opargs largs = { + .lock_stateid = &lsp->ls_stateid, + .open_stateid = &state->stateid, + .lock_owner = { + .clientid = server->nfs4_state->cl_clientid, + .id = lsp->ls_id, + }, + .reclaim = reclaim, + }; struct nfs_lockargs arg = { .fh = NFS_FH(inode), .type = nfs4_lck_type(cmd, request), .offset = request->fl_start, .length = nfs4_lck_length(request), + .u = { + .lock = &largs, + }, }; struct nfs_lockres res = { .server = server, @@ -2779,53 +2996,39 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *r .rpc_resp = &res, .rpc_cred = state->owner->so_cred, }; - struct nfs_lock_opargs largs = { - .reclaim = reclaim, - .new_lock_owner = 0, - }; - int status; + int status = -ENOMEM; - if (!(lsp->ls_flags & NFS_LOCK_INITIALIZED)) { + largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); + if (largs.lock_seqid == NULL) + return -ENOMEM; + if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { struct nfs4_state_owner *owner = state->owner; - struct nfs_open_to_lock otl = { - .lock_owner = { - .clientid = server->nfs4_state->cl_clientid, - }, - }; - - otl.lock_seqid = lsp->ls_seqid; - otl.lock_owner.id = lsp->ls_id; - memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid)); - largs.u.open_lock = &otl; + + largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid); + if (largs.open_seqid == NULL) + goto out; largs.new_lock_owner = 1; - arg.u.lock = &largs; - down(&owner->so_sema); - otl.open_seqid = owner->so_seqid; status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - /* increment open_owner seqid on success, and - * seqid mutating errors */ - nfs4_increment_seqid(status, owner); - up(&owner->so_sema); - if (status == 0) { - lsp->ls_flags |= NFS_LOCK_INITIALIZED; - lsp->ls_seqid++; + /* increment open seqid on success, and seqid mutating errors */ + if (largs.new_lock_owner != 0) { + nfs_increment_open_seqid(status, largs.open_seqid); + if (status == 0) + nfs_confirm_seqid(&lsp->ls_seqid, 0); } - } else { - struct nfs_exist_lock el = { - .seqid = lsp->ls_seqid, - }; - memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid)); - largs.u.exist_lock = ⪙ - arg.u.lock = &largs; + nfs_free_seqid(largs.open_seqid); + } else status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); - /* increment seqid on success, and * seqid mutating errors*/ - nfs4_increment_lock_seqid(status, lsp); - } + /* increment lock seqid on success, and seqid mutating errors*/ + nfs_increment_lock_seqid(status, largs.lock_seqid); /* save the returned stateid. */ - if (status == 0) - memcpy(&lsp->ls_stateid, &res.u.stateid, sizeof(nfs4_stateid)); - else if (status == -NFS4ERR_DENIED) + if (status == 0) { + memcpy(lsp->ls_stateid.data, res.u.stateid.data, + sizeof(lsp->ls_stateid.data)); + lsp->ls_flags |= NFS_LOCK_INITIALIZED; + } else if (status == -NFS4ERR_DENIED) status = -EAGAIN; +out: + nfs_free_seqid(largs.lock_seqid); return status; } @@ -2865,11 +3068,9 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock int status; down_read(&clp->cl_sem); - down(&state->lock_sema); status = nfs4_set_lock_state(state, request); if (status == 0) status = _nfs4_do_setlk(state, cmd, request, 0); - up(&state->lock_sema); if (status == 0) { /* Note: we always want to sleep here! */ request->fl_flags |= FL_SLEEP; @@ -3024,8 +3225,8 @@ struct nfs_rpc_ops nfs_v4_clientops = { .read_setup = nfs4_proc_read_setup, .write_setup = nfs4_proc_write_setup, .commit_setup = nfs4_proc_commit_setup, - .file_open = nfs4_proc_file_open, - .file_release = nfs4_proc_file_release, + .file_open = nfs_open, + .file_release = nfs_release, .lock = nfs4_proc_lock, .clear_acl_cache = nfs4_zap_acl_attr, }; diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index afe587d82f1..2d5a6a2b9de 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -264,13 +264,16 @@ nfs4_alloc_state_owner(void) { struct nfs4_state_owner *sp; - sp = kmalloc(sizeof(*sp),GFP_KERNEL); + sp = kzalloc(sizeof(*sp),GFP_KERNEL); if (!sp) return NULL; - init_MUTEX(&sp->so_sema); - sp->so_seqid = 0; /* arbitrary */ + spin_lock_init(&sp->so_lock); INIT_LIST_HEAD(&sp->so_states); INIT_LIST_HEAD(&sp->so_delegations); + 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); atomic_set(&sp->so_count, 1); return sp; } @@ -359,7 +362,6 @@ nfs4_alloc_open_state(void) memset(state->stateid.data, 0, sizeof(state->stateid.data)); atomic_set(&state->count, 1); INIT_LIST_HEAD(&state->lock_states); - init_MUTEX(&state->lock_sema); spin_lock_init(&state->state_lock); return state; } @@ -437,21 +439,23 @@ nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) if (state) goto out; new = nfs4_alloc_open_state(); + spin_lock(&owner->so_lock); spin_lock(&inode->i_lock); state = __nfs4_find_state_byowner(inode, owner); if (state == NULL && new != NULL) { state = new; - /* Caller *must* be holding owner->so_sem */ - /* Note: The reclaim code dictates that we add stateless - * and read-only stateids to the end of the list */ - list_add_tail(&state->open_states, &owner->so_states); state->owner = owner; atomic_inc(&owner->so_count); list_add(&state->inode_states, &nfsi->open_states); state->inode = igrab(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 */ + list_add_tail(&state->open_states, &owner->so_states); + spin_unlock(&owner->so_lock); } else { spin_unlock(&inode->i_lock); + spin_unlock(&owner->so_lock); if (new) nfs4_free_open_state(new); } @@ -461,19 +465,21 @@ out: /* * Beware! Caller must be holding exactly one - * reference to clp->cl_sem and owner->so_sema! + * reference to clp->cl_sem! */ void nfs4_put_open_state(struct nfs4_state *state) { struct inode *inode = state->inode; struct nfs4_state_owner *owner = state->owner; - if (!atomic_dec_and_lock(&state->count, &inode->i_lock)) + if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) return; + spin_lock(&inode->i_lock); if (!list_empty(&state->inode_states)) list_del(&state->inode_states); - spin_unlock(&inode->i_lock); list_del(&state->open_states); + spin_unlock(&inode->i_lock); + spin_unlock(&owner->so_lock); iput(inode); BUG_ON (state->state != 0); nfs4_free_open_state(state); @@ -481,20 +487,17 @@ void nfs4_put_open_state(struct nfs4_state *state) } /* - * Beware! Caller must be holding no references to clp->cl_sem! - * of owner->so_sema! + * Close the current file. */ void nfs4_close_state(struct nfs4_state *state, mode_t mode) { struct inode *inode = state->inode; struct nfs4_state_owner *owner = state->owner; - struct nfs4_client *clp = owner->so_client; int newstate; atomic_inc(&owner->so_count); - down_read(&clp->cl_sem); - down(&owner->so_sema); /* Protect against nfs4_find_state() */ + spin_lock(&owner->so_lock); spin_lock(&inode->i_lock); if (mode & FMODE_READ) state->nreaders--; @@ -507,6 +510,7 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode) list_move_tail(&state->open_states, &owner->so_states); } spin_unlock(&inode->i_lock); + spin_unlock(&owner->so_lock); newstate = 0; if (state->state != 0) { if (state->nreaders) @@ -515,14 +519,16 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode) newstate |= FMODE_WRITE; if (state->state == newstate) goto out; - if (nfs4_do_close(inode, state, newstate) == -EINPROGRESS) + if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { + state->state = newstate; + goto out; + } + if (nfs4_do_close(inode, state, newstate) == 0) return; } out: nfs4_put_open_state(state); - up(&owner->so_sema); nfs4_put_state_owner(owner); - up_read(&clp->cl_sem); } /* @@ -546,19 +552,16 @@ __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) * Return a compatible lock_state. If no initialized lock_state structure * exists, return an uninitialized one. * - * The caller must be holding state->lock_sema */ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) { struct nfs4_lock_state *lsp; struct nfs4_client *clp = state->owner->so_client; - lsp = kmalloc(sizeof(*lsp), GFP_KERNEL); + lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); if (lsp == NULL) return NULL; - lsp->ls_flags = 0; - lsp->ls_seqid = 0; /* arbitrary */ - memset(lsp->ls_stateid.data, 0, sizeof(lsp->ls_stateid.data)); + lsp->ls_seqid.sequence = &state->owner->so_sequence; atomic_set(&lsp->ls_count, 1); lsp->ls_owner = fl_owner; spin_lock(&clp->cl_lock); @@ -572,7 +575,7 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f * Return a compatible lock_state. If no initialized lock_state structure * exists, return an uninitialized one. * - * The caller must be holding state->lock_sema and clp->cl_sem + * The caller must be holding clp->cl_sem */ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) { @@ -605,7 +608,7 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_ * Release reference to lock_state, and free it if we see that * it is no longer in use */ -static void nfs4_put_lock_state(struct nfs4_lock_state *lsp) +void nfs4_put_lock_state(struct nfs4_lock_state *lsp) { struct nfs4_state *state; @@ -673,29 +676,94 @@ void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t f nfs4_put_lock_state(lsp); } -/* -* Called with state->lock_sema and clp->cl_sem held. -*/ -void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *lsp) +struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) { - if (status == NFS_OK || seqid_mutating_err(-status)) - lsp->ls_seqid++; + struct nfs_seqid *new; + + new = kmalloc(sizeof(*new), GFP_KERNEL); + if (new != NULL) { + new->sequence = counter; + INIT_LIST_HEAD(&new->list); + } + return new; +} + +void nfs_free_seqid(struct nfs_seqid *seqid) +{ + struct rpc_sequence *sequence = seqid->sequence->sequence; + + if (!list_empty(&seqid->list)) { + spin_lock(&sequence->lock); + list_del(&seqid->list); + spin_unlock(&sequence->lock); + } + rpc_wake_up_next(&sequence->wait); + kfree(seqid); } /* -* Called with sp->so_sema and clp->cl_sem held. -* -* 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() -*/ -void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp) -{ - if (status == NFS_OK || seqid_mutating_err(-status)) - sp->so_seqid++; - /* If the server returns BAD_SEQID, unhash state_owner here */ - if (status == -NFS4ERR_BAD_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() + */ +static inline void nfs_increment_seqid(int status, struct nfs_seqid *seqid) +{ + switch (status) { + case 0: + break; + case -NFS4ERR_BAD_SEQID: + case -NFS4ERR_STALE_CLIENTID: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_BAD_STATEID: + case -NFS4ERR_BADXDR: + case -NFS4ERR_RESOURCE: + case -NFS4ERR_NOFILEHANDLE: + /* Non-seqid mutating errors */ + return; + }; + /* + * Note: no locking needed as we are guaranteed to be first + * on the sequence list + */ + seqid->sequence->counter++; +} + +void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) +{ + if (status == -NFS4ERR_BAD_SEQID) { + struct nfs4_state_owner *sp = container_of(seqid->sequence, + struct nfs4_state_owner, so_seqid); nfs4_drop_state_owner(sp); + } + return nfs_increment_seqid(status, seqid); +} + +/* + * Increment the seqid if the LOCK/LOCKU succeeded, or + * failed with a seqid incrementing error - + * see comments nfs_fs.h:seqid_mutating_error() + */ +void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) +{ + return nfs_increment_seqid(status, seqid); +} + +int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) +{ + struct rpc_sequence *sequence = seqid->sequence->sequence; + int status = 0; + + if (sequence->list.next == &seqid->list) + goto out; + spin_lock(&sequence->lock); + if (!list_empty(&sequence->list)) { + rpc_sleep_on(&sequence->wait, task, NULL, NULL); + status = -EAGAIN; + } else + list_add(&seqid->list, &sequence->list); + spin_unlock(&sequence->lock); +out: + return status; } static int reclaimer(void *); @@ -791,8 +859,6 @@ static int nfs4_reclaim_open_state(struct nfs4_state_recovery_ops *ops, struct n if (state->state == 0) continue; status = ops->recover_open(sp, state); - list_for_each_entry(lock, &state->lock_states, ls_locks) - lock->ls_flags &= ~NFS_LOCK_INITIALIZED; if (status >= 0) { status = nfs4_reclaim_locks(ops, state); if (status < 0) @@ -831,6 +897,28 @@ out_err: return status; } +static void nfs4_state_mark_reclaim(struct nfs4_client *clp) +{ + struct nfs4_state_owner *sp; + struct nfs4_state *state; + struct nfs4_lock_state *lock; + + /* Reset all sequence ids to zero */ + list_for_each_entry(sp, &clp->cl_state_owners, so_list) { + sp->so_seqid.counter = 0; + sp->so_seqid.flags = 0; + spin_lock(&sp->so_lock); + list_for_each_entry(state, &sp->so_states, open_states) { + list_for_each_entry(lock, &state->lock_states, ls_locks) { + lock->ls_seqid.counter = 0; + lock->ls_seqid.flags = 0; + lock->ls_flags &= ~NFS_LOCK_INITIALIZED; + } + } + spin_unlock(&sp->so_lock); + } +} + static int reclaimer(void *ptr) { struct reclaimer_args *args = (struct reclaimer_args *)ptr; @@ -864,6 +952,7 @@ restart_loop: default: ops = &nfs4_network_partition_recovery_ops; }; + nfs4_state_mark_reclaim(clp); status = __nfs4_init_client(clp); if (status) goto out_error; diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 6c564ef9489..fbbace8a30c 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -95,6 +95,8 @@ static int nfs_stat_to_errno(int); #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz) #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 (op_encode_hdr_maxsz + 2) #define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11) #define encode_renew_maxsz (op_encode_hdr_maxsz + 3) @@ -157,16 +159,20 @@ static int nfs_stat_to_errno(int); op_decode_hdr_maxsz + 2) #define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ - op_encode_hdr_maxsz + 8) + op_encode_hdr_maxsz + 8 + \ + encode_getattr_maxsz) #define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ - op_decode_hdr_maxsz + 4) + op_decode_hdr_maxsz + 4 + \ + decode_getattr_maxsz) #define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ - op_encode_hdr_maxsz + 3) + op_encode_hdr_maxsz + 3 + \ + encode_getattr_maxsz) #define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ - op_decode_hdr_maxsz + 2) + op_decode_hdr_maxsz + 2 + \ + decode_getattr_maxsz) #define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ op_encode_hdr_maxsz + \ @@ -196,17 +202,21 @@ static int nfs_stat_to_errno(int); #define NFS4_enc_open_downgrade_sz \ (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ - op_encode_hdr_maxsz + 7) + op_encode_hdr_maxsz + 7 + \ + encode_getattr_maxsz) #define NFS4_dec_open_downgrade_sz \ (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ - op_decode_hdr_maxsz + 4) + op_decode_hdr_maxsz + 4 + \ + decode_getattr_maxsz) #define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ - op_encode_hdr_maxsz + 5) + op_encode_hdr_maxsz + 5 + \ + encode_getattr_maxsz) #define NFS4_dec_close_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ - op_decode_hdr_maxsz + 4) + op_decode_hdr_maxsz + 4 + \ + decode_getattr_maxsz) #define NFS4_enc_setattr_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ op_encode_hdr_maxsz + 4 + \ @@ -300,30 +310,44 @@ static int nfs_stat_to_errno(int); decode_getfh_maxsz) #define NFS4_enc_remove_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ - encode_remove_maxsz) + encode_remove_maxsz + \ + encode_getattr_maxsz) #define NFS4_dec_remove_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ - op_decode_hdr_maxsz + 5) + op_decode_hdr_maxsz + 5 + \ + decode_getattr_maxsz) #define NFS4_enc_rename_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ - encode_rename_maxsz) + encode_rename_maxsz + \ + encode_getattr_maxsz + \ + encode_restorefh_maxsz + \ + encode_getattr_maxsz) #define NFS4_dec_rename_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ - decode_rename_maxsz) + decode_rename_maxsz + \ + decode_getattr_maxsz + \ + decode_restorefh_maxsz + \ + decode_getattr_maxsz) #define NFS4_enc_link_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_savefh_maxsz + \ encode_putfh_maxsz + \ - encode_link_maxsz) + encode_link_maxsz + \ + decode_getattr_maxsz + \ + encode_restorefh_maxsz + \ + decode_getattr_maxsz) #define NFS4_dec_link_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ decode_savefh_maxsz + \ decode_putfh_maxsz + \ - decode_link_maxsz) + decode_link_maxsz + \ + decode_getattr_maxsz + \ + decode_restorefh_maxsz + \ + decode_getattr_maxsz) #define NFS4_enc_symlink_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_symlink_maxsz + \ @@ -336,14 +360,20 @@ static int nfs_stat_to_errno(int); decode_getfh_maxsz) #define NFS4_enc_create_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ + encode_savefh_maxsz + \ encode_create_maxsz + \ + encode_getfh_maxsz + \ encode_getattr_maxsz + \ - encode_getfh_maxsz) + encode_restorefh_maxsz + \ + encode_getattr_maxsz) #define NFS4_dec_create_sz (compound_decode_hdr_maxsz + \ decode_putfh_maxsz + \ + decode_savefh_maxsz + \ decode_create_maxsz + \ + decode_getfh_maxsz + \ decode_getattr_maxsz + \ - decode_getfh_maxsz) + decode_restorefh_maxsz + \ + decode_getattr_maxsz) #define NFS4_enc_pathconf_sz (compound_encode_hdr_maxsz + \ encode_putfh_maxsz + \ encode_getattr_maxsz) @@ -602,10 +632,10 @@ static int encode_close(struct xdr_stream *xdr, const struct nfs_closeargs *arg) { uint32_t *p; - RESERVE_SPACE(8+sizeof(arg->stateid.data)); + RESERVE_SPACE(8+sizeof(arg->stateid->data)); WRITE32(OP_CLOSE); - WRITE32(arg->seqid); - WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data)); + WRITE32(arg->seqid->sequence->counter); + WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data)); return 0; } @@ -729,22 +759,18 @@ static int encode_lock(struct xdr_stream *xdr, const struct nfs_lockargs *arg) WRITE64(arg->length); WRITE32(opargs->new_lock_owner); if (opargs->new_lock_owner){ - struct nfs_open_to_lock *ol = opargs->u.open_lock; - RESERVE_SPACE(40); - WRITE32(ol->open_seqid); - WRITEMEM(&ol->open_stateid, sizeof(ol->open_stateid)); - WRITE32(ol->lock_seqid); - WRITE64(ol->lock_owner.clientid); + WRITE32(opargs->open_seqid->sequence->counter); + WRITEMEM(opargs->open_stateid->data, sizeof(opargs->open_stateid->data)); + WRITE32(opargs->lock_seqid->sequence->counter); + WRITE64(opargs->lock_owner.clientid); WRITE32(4); - WRITE32(ol->lock_owner.id); + WRITE32(opargs->lock_owner.id); } else { - struct nfs_exist_lock *el = opargs->u.exist_lock; - RESERVE_SPACE(20); - WRITEMEM(&el->stateid, sizeof(el->stateid)); - WRITE32(el->seqid); + WRITEMEM(opargs->lock_stateid->data, sizeof(opargs->lock_stateid->data)); + WRITE32(opargs->lock_seqid->sequence->counter); } return 0; @@ -775,8 +801,8 @@ static int encode_locku(struct xdr_stream *xdr, const struct nfs_lockargs *arg) RESERVE_SPACE(44); WRITE32(OP_LOCKU); WRITE32(arg->type); - WRITE32(opargs->seqid); - WRITEMEM(&opargs->stateid, sizeof(opargs->stateid)); + WRITE32(opargs->seqid->sequence->counter); + WRITEMEM(opargs->stateid->data, sizeof(opargs->stateid->data)); WRITE64(arg->offset); WRITE64(arg->length); @@ -826,7 +852,7 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena */ RESERVE_SPACE(8); WRITE32(OP_OPEN); - WRITE32(arg->seqid); + WRITE32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->open_flags); RESERVE_SPACE(16); WRITE64(arg->clientid); @@ -941,7 +967,7 @@ static int encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_con RESERVE_SPACE(8+sizeof(arg->stateid.data)); WRITE32(OP_OPEN_CONFIRM); WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data)); - WRITE32(arg->seqid); + WRITE32(arg->seqid->sequence->counter); return 0; } @@ -950,10 +976,10 @@ static int encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closea { uint32_t *p; - RESERVE_SPACE(8+sizeof(arg->stateid.data)); + RESERVE_SPACE(8+sizeof(arg->stateid->data)); WRITE32(OP_OPEN_DOWNGRADE); - WRITEMEM(arg->stateid.data, sizeof(arg->stateid.data)); - WRITE32(arg->seqid); + WRITEMEM(arg->stateid->data, sizeof(arg->stateid->data)); + WRITE32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->open_flags); return 0; } @@ -1117,6 +1143,17 @@ static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client } static int +encode_restorefh(struct xdr_stream *xdr) +{ + uint32_t *p; + + RESERVE_SPACE(4); + WRITE32(OP_RESTOREFH); + + return 0; +} + +static int encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg) { uint32_t *p; @@ -1296,14 +1333,18 @@ static int nfs4_xdr_enc_remove(struct rpc_rqst *req, uint32_t *p, const struct n { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 2, + .nops = 3, }; int status; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); - if ((status = encode_putfh(&xdr, args->fh)) == 0) - status = encode_remove(&xdr, args->name); + if ((status = encode_putfh(&xdr, args->fh)) != 0) + goto out; + if ((status = encode_remove(&xdr, args->name)) != 0) + goto out; + status = encode_getfattr(&xdr, args->bitmask); +out: return status; } @@ -1314,7 +1355,7 @@ static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct n { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 4, + .nops = 7, }; int status; @@ -1326,7 +1367,13 @@ static int nfs4_xdr_enc_rename(struct rpc_rqst *req, uint32_t *p, const struct n goto out; if ((status = encode_putfh(&xdr, args->new_dir)) != 0) goto out; - status = encode_rename(&xdr, args->old_name, args->new_name); + if ((status = encode_rename(&xdr, args->old_name, args->new_name)) != 0) + goto out; + if ((status = encode_getfattr(&xdr, args->bitmask)) != 0) + goto out; + if ((status = encode_restorefh(&xdr)) != 0) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1338,7 +1385,7 @@ static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 4, + .nops = 7, }; int status; @@ -1350,7 +1397,13 @@ static int nfs4_xdr_enc_link(struct rpc_rqst *req, uint32_t *p, const struct nfs goto out; if ((status = encode_putfh(&xdr, args->dir_fh)) != 0) goto out; - status = encode_link(&xdr, args->name); + if ((status = encode_link(&xdr, args->name)) != 0) + goto out; + if ((status = encode_getfattr(&xdr, args->bitmask)) != 0) + goto out; + if ((status = encode_restorefh(&xdr)) != 0) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1362,7 +1415,7 @@ static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct n { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 4, + .nops = 7, }; int status; @@ -1370,10 +1423,16 @@ static int nfs4_xdr_enc_create(struct rpc_rqst *req, uint32_t *p, const struct n encode_compound_hdr(&xdr, &hdr); if ((status = encode_putfh(&xdr, args->dir_fh)) != 0) goto out; + if ((status = encode_savefh(&xdr)) != 0) + goto out; if ((status = encode_create(&xdr, args)) != 0) goto out; if ((status = encode_getfh(&xdr)) != 0) goto out; + if ((status = encode_getfattr(&xdr, args->bitmask)) != 0) + goto out; + if ((status = encode_restorefh(&xdr)) != 0) + goto out; status = encode_getfattr(&xdr, args->bitmask); out: return status; @@ -1412,7 +1471,7 @@ static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_clos { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 2, + .nops = 3, }; int status; @@ -1422,6 +1481,9 @@ static int nfs4_xdr_enc_close(struct rpc_rqst *req, uint32_t *p, struct nfs_clos if(status) goto out; status = encode_close(&xdr, args); + if (status != 0) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1433,15 +1495,21 @@ static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_opena { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 4, + .nops = 7, }; int status; + status = nfs_wait_on_sequence(args->seqid, req->rq_task); + if (status != 0) + goto out; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); status = encode_putfh(&xdr, args->fh); if (status) goto out; + status = encode_savefh(&xdr); + if (status) + goto out; status = encode_open(&xdr, args); if (status) goto out; @@ -1449,6 +1517,12 @@ static int nfs4_xdr_enc_open(struct rpc_rqst *req, uint32_t *p, struct nfs_opena if (status) goto out; status = encode_getfattr(&xdr, args->bitmask); + if (status) + goto out; + status = encode_restorefh(&xdr); + if (status) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1464,6 +1538,9 @@ static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, uint32_t *p, struct n }; int status; + status = nfs_wait_on_sequence(args->seqid, req->rq_task); + if (status != 0) + goto out; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); status = encode_putfh(&xdr, args->fh); @@ -1485,6 +1562,9 @@ static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nf }; int status; + status = nfs_wait_on_sequence(args->seqid, req->rq_task); + if (status != 0) + goto out; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); status = encode_putfh(&xdr, args->fh); @@ -1502,7 +1582,7 @@ static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 2, + .nops = 3, }; int status; @@ -1512,6 +1592,9 @@ static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, uint32_t *p, struct if (status) goto out; status = encode_open_downgrade(&xdr, args); + if (status != 0) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1525,8 +1608,15 @@ static int nfs4_xdr_enc_lock(struct rpc_rqst *req, uint32_t *p, struct nfs_locka struct compound_hdr hdr = { .nops = 2, }; + struct nfs_lock_opargs *opargs = args->u.lock; int status; + status = nfs_wait_on_sequence(opargs->lock_seqid, req->rq_task); + if (status != 0) + goto out; + /* Do we need to do an open_to_lock_owner? */ + if (opargs->lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED) + opargs->new_lock_owner = 0; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_compound_hdr(&xdr, &hdr); status = encode_putfh(&xdr, args->fh); @@ -1713,7 +1803,7 @@ static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writ { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 2, + .nops = 3, }; int status; @@ -1723,6 +1813,9 @@ static int nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writ if (status) goto out; status = encode_write(&xdr, args); + if (status) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -1734,7 +1827,7 @@ static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_wri { struct xdr_stream xdr; struct compound_hdr hdr = { - .nops = 2, + .nops = 3, }; int status; @@ -1744,6 +1837,9 @@ static int nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_wri if (status) goto out; status = encode_commit(&xdr, args); + if (status) + goto out; + status = encode_getfattr(&xdr, args->bitmask); out: return status; } @@ -2670,8 +2766,7 @@ static int decode_server_caps(struct xdr_stream *xdr, struct nfs4_server_caps_re goto xdr_error; status = verify_attr_len(xdr, savep, attrlen); xdr_error: - if (status != 0) - printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status); + dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status); return status; } @@ -2704,8 +2799,7 @@ static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat) status = verify_attr_len(xdr, savep, attrlen); xdr_error: - if (status != 0) - printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status); + dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status); return status; } @@ -2730,8 +2824,7 @@ static int decode_pathconf(struct xdr_stream *xdr, struct nfs_pathconf *pathconf status = verify_attr_len(xdr, savep, attrlen); xdr_error: - if (status != 0) - printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status); + dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status); return status; } @@ -2787,13 +2880,10 @@ static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, cons goto xdr_error; if ((status = decode_attr_time_modify(xdr, bitmap, &fattr->mtime)) != 0) goto xdr_error; - if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) { + if ((status = verify_attr_len(xdr, savep, attrlen)) == 0) fattr->valid = NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4; - fattr->timestamp = jiffies; - } xdr_error: - if (status != 0) - printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status); + dprintk("%s: xdr returned %d\n", __FUNCTION__, -status); return status; } @@ -2826,8 +2916,7 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) status = verify_attr_len(xdr, savep, attrlen); xdr_error: - if (status != 0) - printk(KERN_NOTICE "%s: xdr error %d!\n", __FUNCTION__, -status); + dprintk("%s: xdr returned %d!\n", __FUNCTION__, -status); return status; } @@ -2890,8 +2979,8 @@ static int decode_lock(struct xdr_stream *xdr, struct nfs_lockres *res) status = decode_op_hdr(xdr, OP_LOCK); if (status == 0) { - READ_BUF(sizeof(nfs4_stateid)); - COPYMEM(&res->u.stateid, sizeof(res->u.stateid)); + READ_BUF(sizeof(res->u.stateid.data)); + COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data)); } else if (status == -NFS4ERR_DENIED) return decode_lock_denied(xdr, &res->u.denied); return status; @@ -2913,8 +3002,8 @@ static int decode_locku(struct xdr_stream *xdr, struct nfs_lockres *res) status = decode_op_hdr(xdr, OP_LOCKU); if (status == 0) { - READ_BUF(sizeof(nfs4_stateid)); - COPYMEM(&res->u.stateid, sizeof(res->u.stateid)); + READ_BUF(sizeof(res->u.stateid.data)); + COPYMEM(res->u.stateid.data, sizeof(res->u.stateid.data)); } return status; } @@ -2994,7 +3083,7 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res) p += bmlen; return decode_delegation(xdr, res); xdr_error: - printk(KERN_NOTICE "%s: xdr error!\n", __FUNCTION__); + dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen); return -EIO; } @@ -3208,6 +3297,12 @@ static int decode_renew(struct xdr_stream *xdr) return decode_op_hdr(xdr, OP_RENEW); } +static int +decode_restorefh(struct xdr_stream *xdr) +{ + return decode_op_hdr(xdr, OP_RESTOREFH); +} + static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, size_t *acl_len) { @@ -3243,7 +3338,8 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req, if (attrlen <= *acl_len) xdr_read_pages(xdr, attrlen); *acl_len = attrlen; - } + } else + status = -EOPNOTSUPP; out: return status; @@ -3352,6 +3448,9 @@ static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, uint32_t *p, stru if (status) goto out; status = decode_open_downgrade(&xdr, res); + if (status != 0) + goto out; + decode_getfattr(&xdr, res->fattr, res->server); out: return status; } @@ -3424,7 +3523,7 @@ out: /* * Decode REMOVE response */ -static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo) +static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_remove_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; @@ -3433,8 +3532,11 @@ static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); if ((status = decode_compound_hdr(&xdr, &hdr)) != 0) goto out; - if ((status = decode_putfh(&xdr)) == 0) - status = decode_remove(&xdr, cinfo); + if ((status = decode_putfh(&xdr)) != 0) + goto out; + if ((status = decode_remove(&xdr, &res->cinfo)) != 0) + goto out; + decode_getfattr(&xdr, res->dir_attr, res->server); out: return status; } @@ -3457,7 +3559,14 @@ static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; - status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo); + if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0) + goto out; + /* Current FH is target directory */ + if (decode_getfattr(&xdr, res->new_fattr, res->server) != 0) + goto out; + if ((status = decode_restorefh(&xdr)) != 0) + goto out; + decode_getfattr(&xdr, res->old_fattr, res->server); out: return status; } @@ -3465,7 +3574,7 @@ out: /* * Decode LINK response */ -static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_change_info *cinfo) +static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_link_res *res) { struct xdr_stream xdr; struct compound_hdr hdr; @@ -3480,7 +3589,17 @@ static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ch goto out; if ((status = decode_putfh(&xdr)) != 0) goto out; - status = decode_link(&xdr, cinfo); + if ((status = decode_link(&xdr, &res->cinfo)) != 0) + goto out; + /* + * Note order: OP_LINK leaves the directory as the current + * filehandle. + */ + if (decode_getfattr(&xdr, res->dir_attr, res->server) != 0) + goto out; + if ((status = decode_restorefh(&xdr)) != 0) + goto out; + decode_getfattr(&xdr, res->fattr, res->server); out: return status; } @@ -3499,13 +3618,17 @@ static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_ 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) goto out; - status = decode_getfattr(&xdr, res->fattr, res->server); - if (status == NFS4ERR_DELAY) - status = 0; + if (decode_getfattr(&xdr, res->fattr, res->server) != 0) + goto out; + if ((status = decode_restorefh(&xdr)) != 0) + goto out; + decode_getfattr(&xdr, res->dir_fattr, res->server); out: return status; } @@ -3623,6 +3746,15 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_cl if (status) goto out; status = decode_close(&xdr, res); + if (status != 0) + goto out; + /* + * Note: Server may do delete on close for this file + * in which case the getattr call will fail with + * an ESTALE error. Shouldn't be a problem, + * though, since fattr->valid will remain unset. + */ + decode_getfattr(&xdr, res->fattr, res->server); out: return status; } @@ -3643,15 +3775,20 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_ope status = decode_putfh(&xdr); if (status) goto out; + status = decode_savefh(&xdr); + if (status) + goto out; status = decode_open(&xdr, res); if (status) goto out; status = decode_getfh(&xdr, &res->fh); if (status) goto out; - status = decode_getfattr(&xdr, res->f_attr, res->server); - if (status == NFS4ERR_DELAY) - status = 0; + if (decode_getfattr(&xdr, res->f_attr, res->server) != 0) + goto out; + if ((status = decode_restorefh(&xdr)) != 0) + goto out; + decode_getfattr(&xdr, res->dir_attr, res->server); out: return status; } @@ -3869,6 +4006,9 @@ static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_wr if (status) goto out; status = decode_write(&xdr, res); + if (status) + goto out; + decode_getfattr(&xdr, res->fattr, res->server); if (!status) status = res->count; out: @@ -3892,6 +4032,9 @@ static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_w if (status) goto out; status = decode_commit(&xdr, res); + if (status) + goto out; + decode_getfattr(&xdr, res->fattr, res->server); out: return status; } diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index be23c3fb926..a48a003242c 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -61,7 +61,7 @@ nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("%s: call getattr\n", __FUNCTION__); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0); dprintk("%s: reply getattr: %d\n", __FUNCTION__, status); if (status) @@ -93,7 +93,7 @@ nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call getattr\n"); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(server->client, NFSPROC_GETATTR, fhandle, fattr, 0); dprintk("NFS reply getattr: %d\n", status); @@ -112,7 +112,7 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, int status; dprintk("NFS call setattr\n"); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0); if (status == 0) nfs_setattr_update_inode(inode, sattr); @@ -136,7 +136,7 @@ nfs_proc_lookup(struct inode *dir, struct qstr *name, int status; dprintk("NFS call lookup %s\n", name->name); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0); dprintk("NFS reply lookup: %d\n", status); return status; @@ -174,7 +174,7 @@ static int nfs_proc_read(struct nfs_read_data *rdata) dprintk("NFS call read %d @ %Ld\n", rdata->args.count, (long long) rdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) { nfs_refresh_inode(inode, fattr); @@ -203,10 +203,10 @@ static int nfs_proc_write(struct nfs_write_data *wdata) dprintk("NFS call write %d @ %Ld\n", wdata->args.count, (long long) wdata->args.offset); - fattr->valid = 0; + nfs_fattr_init(fattr); status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags); if (status >= 0) { - nfs_refresh_inode(inode, fattr); + nfs_post_op_update_inode(inode, fattr); wdata->res.count = wdata->args.count; wdata->verf.committed = NFS_FILE_SYNC; } @@ -216,7 +216,7 @@ static int nfs_proc_write(struct nfs_write_data *wdata) static int nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, - int flags) + int flags, struct nameidata *nd) { struct nfs_fh fhandle; struct nfs_fattr fattr; @@ -232,7 +232,7 @@ nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, }; int status; - fattr.valid = 0; + nfs_fattr_init(&fattr); dprintk("NFS call create %s\n", dentry->d_name.name); status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); if (status == 0) @@ -273,12 +273,13 @@ nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ } - fattr.valid = 0; + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); + nfs_mark_for_revalidate(dir); if (status == -EINVAL && S_ISFIFO(mode)) { sattr->ia_mode = mode; - fattr.valid = 0; + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0); } if (status == 0) @@ -305,6 +306,7 @@ nfs_proc_remove(struct inode *dir, struct qstr *name) dprintk("NFS call remove %s\n", name->name); status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + nfs_mark_for_revalidate(dir); dprintk("NFS reply remove: %d\n", status); return status; @@ -331,8 +333,10 @@ nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task) { struct rpc_message *msg = &task->tk_msg; - if (msg->rpc_argp) + if (msg->rpc_argp) { + nfs_mark_for_revalidate(dir->d_inode); kfree(msg->rpc_argp); + } return 0; } @@ -352,6 +356,8 @@ nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0); + nfs_mark_for_revalidate(old_dir); + nfs_mark_for_revalidate(new_dir); dprintk("NFS reply rename: %d\n", status); return status; } @@ -369,6 +375,7 @@ nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) dprintk("NFS call link %s\n", name->name); status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0); + nfs_mark_for_revalidate(dir); dprintk("NFS reply link: %d\n", status); return status; } @@ -391,9 +398,10 @@ nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path, if (path->len > NFS2_MAXPATHLEN) return -ENAMETOOLONG; dprintk("NFS call symlink %s -> %s\n", name->name, path->name); - fattr->valid = 0; + nfs_fattr_init(fattr); fhandle->size = 0; status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0); + nfs_mark_for_revalidate(dir); dprintk("NFS reply symlink: %d\n", status); return status; } @@ -416,8 +424,9 @@ nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) int status; dprintk("NFS call mkdir %s\n", dentry->d_name.name); - fattr.valid = 0; + nfs_fattr_init(&fattr); status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0); + nfs_mark_for_revalidate(dir); if (status == 0) status = nfs_instantiate(dentry, &fhandle, &fattr); dprintk("NFS reply mkdir: %d\n", status); @@ -436,6 +445,7 @@ nfs_proc_rmdir(struct inode *dir, struct qstr *name) dprintk("NFS call rmdir %s\n", name->name); status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0); + nfs_mark_for_revalidate(dir); dprintk("NFS reply rmdir: %d\n", status); return status; } @@ -484,7 +494,7 @@ nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call statfs\n"); - stat->fattr->valid = 0; + nfs_fattr_init(stat->fattr); status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); dprintk("NFS reply statfs: %d\n", status); if (status) @@ -507,7 +517,7 @@ nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, int status; dprintk("NFS call fsinfo\n"); - info->fattr->valid = 0; + nfs_fattr_init(info->fattr); status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0); dprintk("NFS reply fsinfo: %d\n", status); if (status) @@ -579,7 +589,7 @@ nfs_write_done(struct rpc_task *task) struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; if (task->tk_status >= 0) - nfs_refresh_inode(data->inode, data->res.fattr); + nfs_post_op_update_inode(data->inode, data->res.fattr); nfs_writeback_done(task); } diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 9758ebd4990..43b03b19731 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -215,6 +215,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data, data->res.fattr = &data->fattr; data->res.count = count; data->res.eof = 0; + nfs_fattr_init(&data->fattr); NFS_PROTO(inode)->read_setup(data); diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 5130eda231d..819a65f5071 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -870,6 +870,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req, data->res.fattr = &data->fattr; data->res.count = count; data->res.verf = &data->verf; + nfs_fattr_init(&data->fattr); NFS_PROTO(inode)->write_setup(data, how); @@ -1237,6 +1238,7 @@ static void nfs_commit_rpcsetup(struct list_head *head, data->res.count = 0; data->res.fattr = &data->fattr; data->res.verf = &data->verf; + nfs_fattr_init(&data->fattr); NFS_PROTO(inode)->commit_setup(data, how); diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog index de58579a1d0..50a7749cfca 100644 --- a/fs/ntfs/ChangeLog +++ b/fs/ntfs/ChangeLog @@ -1,18 +1,15 @@ ToDo/Notes: - Find and fix bugs. - - In between ntfs_prepare/commit_write, need exclusion between - simultaneous file extensions. This is given to us by holding i_sem - on the inode. The only places in the kernel when a file is resized - are prepare/commit write and truncate for both of which i_sem is - held. Just have to be careful in readpage/writepage and all other - helpers not running under i_sem that we play nice... - Also need to be careful with initialized_size extention in - ntfs_prepare_write. Basically, just be _very_ careful in this code... - UPDATE: The only things that need to be checked are read/writepage - which do not hold i_sem. Note writepage cannot change i_size but it - needs to cope with a concurrent i_size change, just like readpage. - Also both need to cope with concurrent changes to the other sizes, - i.e. initialized/allocated/compressed size, as well. + - The only places in the kernel where a file is resized are + ntfs_file_write*() and ntfs_truncate() for both of which i_sem is + held. Just have to be careful in read-/writepage and other helpers + not running under i_sem that we play nice... Also need to be careful + with initialized_size extension in ntfs_file_write*() and writepage. + UPDATE: The only things that need to be checked are the compressed + write and the other attribute resize/write cases like index + attributes, etc. For now none of these are implemented so are safe. + - Implement filling in of holes in aops.c::ntfs_writepage() and its + helpers. - Implement mft.c::sync_mft_mirror_umount(). We currently will just leave the volume dirty on umount if the final iput(vol->mft_ino) causes a write of any mirrored mft records due to the mft mirror @@ -22,6 +19,68 @@ ToDo/Notes: - Enable the code for setting the NT4 compatibility flag when we start making NTFS 1.2 specific modifications. +2.1.25 - (Almost) fully implement write(2) and truncate(2). + + - Change ntfs_map_runlist_nolock(), ntfs_attr_find_vcn_nolock() and + {__,}ntfs_cluster_free() to also take an optional attribute search + context as argument. This allows calling these functions with the + mft record mapped. Update all callers. + - Fix potential deadlock in ntfs_mft_data_extend_allocation_nolock() + error handling by passing in the active search context when calling + ntfs_cluster_free(). + - Change ntfs_cluster_alloc() to take an extra boolean parameter + specifying whether the cluster are being allocated to extend an + attribute or to fill a hole. + - Change ntfs_attr_make_non_resident() to call ntfs_cluster_alloc() + with @is_extension set to TRUE and remove the runlist terminator + fixup code as this is now done by ntfs_cluster_alloc(). + - Change ntfs_attr_make_non_resident to take the attribute value size + as an extra parameter. This is needed since we need to know the size + before we can map the mft record and our callers always know it. The + reason we cannot simply read the size from the vfs inode i_size is + that this is not necessarily uptodate. This happens when + ntfs_attr_make_non_resident() is called in the ->truncate call path. + - Fix ntfs_attr_make_non_resident() to update the vfs inode i_blocks + which is zero for a resident attribute but should no longer be zero + once the attribute is non-resident as it then has real clusters + allocated. + - Add fs/ntfs/attrib.[hc]::ntfs_attr_extend_allocation(), a function to + extend the allocation of an attributes. Optionally, the data size, + but not the initialized size can be extended, too. + - Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports + uncompressed and unencrypted files and it never creates sparse files + at least for the moment (making a file sparse requires us to modify + its directory entries and we do not support directory operations at + the moment). Also, support for highly fragmented files, i.e. ones + whose data attribute is split across multiple extents, is severly + limited. When such a case is encountered, EOPNOTSUPP is returned. + - Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes + the initial implementation of file truncation. Now both open(2)ing + a file with the O_TRUNC flag and the {,f}truncate(2) system calls + will resize a file appropriately. The limitations are that only + uncompressed and unencrypted files are supported. Also, there is + only very limited support for highly fragmented files (the ones whose + $DATA attribute is split into multiple attribute extents). + - In attrib.c::ntfs_attr_set() call balance_dirty_pages_ratelimited() + and cond_resched() in the main loop as we could be dirtying a lot of + pages and this ensures we play nice with the VM and the system as a + whole. + - Implement file operations ->write, ->aio_write, ->writev for regular + files. This replaces the old use of generic_file_write(), et al and + the address space operations ->prepare_write and ->commit_write. + This means that both sparse and non-sparse (unencrypted and + uncompressed) files can now be extended using the normal write(2) + code path. There are two limitations at present and these are that + we never create sparse files and that we only have limited support + for highly fragmented files, i.e. ones whose data attribute is split + across multiple extents. When such a case is encountered, + EOPNOTSUPP is returned. + - $EA attributes can be both resident and non-resident. + - Use %z for size_t to fix compilation warnings. (Andrew Morton) + - Fix compilation warnings with gcc-4.0.2 on SUSE 10.0. + - Document extended attribute ($EA) NEED_EA flag. (Based on libntfs + patch by Yura Pakhuchiy.) + 2.1.24 - Lots of bug fixes and support more clean journal states. - Support journals ($LogFile) which have been modified by chkdsk. This diff --git a/fs/ntfs/Makefile b/fs/ntfs/Makefile index 894b2b876d3..d0d45d1c853 100644 --- a/fs/ntfs/Makefile +++ b/fs/ntfs/Makefile @@ -6,7 +6,7 @@ ntfs-objs := aops.o attrib.o collate.o compress.o debug.o dir.o file.o \ index.o inode.o mft.o mst.o namei.o runlist.o super.o sysctl.o \ unistr.o upcase.o -EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.24\" +EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.25\" ifeq ($(CONFIG_NTFS_DEBUG),y) EXTRA_CFLAGS += -DDEBUG diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index 5e80c07c6a4..1c0a4315876 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -1391,8 +1391,7 @@ retry_writepage: if (NInoEncrypted(ni)) { unlock_page(page); BUG_ON(ni->type != AT_DATA); - ntfs_debug("Denying write access to encrypted " - "file."); + ntfs_debug("Denying write access to encrypted file."); return -EACCES; } /* Compressed data streams are handled in compress.c. */ @@ -1508,8 +1507,8 @@ retry_writepage: /* Zero out of bounds area in the page cache page. */ memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len); kunmap_atomic(kaddr, KM_USER0); - flush_dcache_mft_record_page(ctx->ntfs_ino); flush_dcache_page(page); + flush_dcache_mft_record_page(ctx->ntfs_ino); /* We are done with the page. */ end_page_writeback(page); /* Finally, mark the mft record dirty, so it gets written back. */ @@ -1542,830 +1541,6 @@ err_out: return err; } -/** - * ntfs_prepare_nonresident_write - - * - */ -static int ntfs_prepare_nonresident_write(struct page *page, - unsigned from, unsigned to) -{ - VCN vcn; - LCN lcn; - s64 initialized_size; - loff_t i_size; - sector_t block, ablock, iblock; - struct inode *vi; - ntfs_inode *ni; - ntfs_volume *vol; - runlist_element *rl; - struct buffer_head *bh, *head, *wait[2], **wait_bh = wait; - unsigned long flags; - unsigned int vcn_ofs, block_start, block_end, blocksize; - int err; - BOOL is_retry; - unsigned char blocksize_bits; - - vi = page->mapping->host; - ni = NTFS_I(vi); - vol = ni->vol; - - ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index " - "0x%lx, from = %u, to = %u.", ni->mft_no, ni->type, - page->index, from, to); - - BUG_ON(!NInoNonResident(ni)); - - blocksize_bits = vi->i_blkbits; - blocksize = 1 << blocksize_bits; - - /* - * create_empty_buffers() will create uptodate/dirty buffers if the - * page is uptodate/dirty. - */ - if (!page_has_buffers(page)) - create_empty_buffers(page, blocksize, 0); - bh = head = page_buffers(page); - if (unlikely(!bh)) - return -ENOMEM; - - /* The first block in the page. */ - block = (s64)page->index << (PAGE_CACHE_SHIFT - blocksize_bits); - - read_lock_irqsave(&ni->size_lock, flags); - /* - * The first out of bounds block for the allocated size. No need to - * round up as allocated_size is in multiples of cluster size and the - * minimum cluster size is 512 bytes, which is equal to the smallest - * blocksize. - */ - ablock = ni->allocated_size >> blocksize_bits; - i_size = i_size_read(vi); - initialized_size = ni->initialized_size; - read_unlock_irqrestore(&ni->size_lock, flags); - - /* The last (fully or partially) initialized block. */ - iblock = initialized_size >> blocksize_bits; - - /* Loop through all the buffers in the page. */ - block_start = 0; - rl = NULL; - err = 0; - do { - block_end = block_start + blocksize; - /* - * If buffer @bh is outside the write, just mark it uptodate - * if the page is uptodate and continue with the next buffer. - */ - if (block_end <= from || block_start >= to) { - if (PageUptodate(page)) { - if (!buffer_uptodate(bh)) - set_buffer_uptodate(bh); - } - continue; - } - /* - * @bh is at least partially being written to. - * Make sure it is not marked as new. - */ - //if (buffer_new(bh)) - // clear_buffer_new(bh); - - if (block >= ablock) { - // TODO: block is above allocated_size, need to - // allocate it. Best done in one go to accommodate not - // only block but all above blocks up to and including: - // ((page->index << PAGE_CACHE_SHIFT) + to + blocksize - // - 1) >> blobksize_bits. Obviously will need to round - // up to next cluster boundary, too. This should be - // done with a helper function, so it can be reused. - ntfs_error(vol->sb, "Writing beyond allocated size " - "is not supported yet. Sorry."); - err = -EOPNOTSUPP; - goto err_out; - // Need to update ablock. - // Need to set_buffer_new() on all block bhs that are - // newly allocated. - } - /* - * Now we have enough allocated size to fulfill the whole - * request, i.e. block < ablock is true. - */ - if (unlikely((block >= iblock) && - (initialized_size < i_size))) { - /* - * If this page is fully outside initialized size, zero - * out all pages between the current initialized size - * and the current page. Just use ntfs_readpage() to do - * the zeroing transparently. - */ - if (block > iblock) { - // TODO: - // For each page do: - // - read_cache_page() - // Again for each page do: - // - wait_on_page_locked() - // - Check (PageUptodate(page) && - // !PageError(page)) - // Update initialized size in the attribute and - // in the inode. - // Again, for each page do: - // __set_page_dirty_buffers(); - // page_cache_release() - // We don't need to wait on the writes. - // Update iblock. - } - /* - * The current page straddles initialized size. Zero - * all non-uptodate buffers and set them uptodate (and - * dirty?). Note, there aren't any non-uptodate buffers - * if the page is uptodate. - * FIXME: For an uptodate page, the buffers may need to - * be written out because they were not initialized on - * disk before. - */ - if (!PageUptodate(page)) { - // TODO: - // Zero any non-uptodate buffers up to i_size. - // Set them uptodate and dirty. - } - // TODO: - // Update initialized size in the attribute and in the - // inode (up to i_size). - // Update iblock. - // FIXME: This is inefficient. Try to batch the two - // size changes to happen in one go. - ntfs_error(vol->sb, "Writing beyond initialized size " - "is not supported yet. Sorry."); - err = -EOPNOTSUPP; - goto err_out; - // Do NOT set_buffer_new() BUT DO clear buffer range - // outside write request range. - // set_buffer_uptodate() on complete buffers as well as - // set_buffer_dirty(). - } - - /* Need to map unmapped buffers. */ - if (!buffer_mapped(bh)) { - /* Unmapped buffer. Need to map it. */ - bh->b_bdev = vol->sb->s_bdev; - - /* Convert block into corresponding vcn and offset. */ - vcn = (VCN)block << blocksize_bits >> - vol->cluster_size_bits; - vcn_ofs = ((VCN)block << blocksize_bits) & - vol->cluster_size_mask; - - is_retry = FALSE; - if (!rl) { -lock_retry_remap: - down_read(&ni->runlist.lock); - rl = ni->runlist.rl; - } - if (likely(rl != NULL)) { - /* Seek to element containing target vcn. */ - while (rl->length && rl[1].vcn <= vcn) - rl++; - lcn = ntfs_rl_vcn_to_lcn(rl, vcn); - } else - lcn = LCN_RL_NOT_MAPPED; - if (unlikely(lcn < 0)) { - /* - * We extended the attribute allocation above. - * If we hit an ENOENT here it means that the - * allocation was insufficient which is a bug. - */ - BUG_ON(lcn == LCN_ENOENT); - - /* It is a hole, need to instantiate it. */ - if (lcn == LCN_HOLE) { - // TODO: Instantiate the hole. - // clear_buffer_new(bh); - // unmap_underlying_metadata(bh->b_bdev, - // bh->b_blocknr); - // For non-uptodate buffers, need to - // zero out the region outside the - // request in this bh or all bhs, - // depending on what we implemented - // above. - // Need to flush_dcache_page(). - // Or could use set_buffer_new() - // instead? - ntfs_error(vol->sb, "Writing into " - "sparse regions is " - "not supported yet. " - "Sorry."); - err = -EOPNOTSUPP; - if (!rl) - up_read(&ni->runlist.lock); - goto err_out; - } else if (!is_retry && - lcn == LCN_RL_NOT_MAPPED) { - is_retry = TRUE; - /* - * Attempt to map runlist, dropping - * lock for the duration. - */ - up_read(&ni->runlist.lock); - err = ntfs_map_runlist(ni, vcn); - if (likely(!err)) - goto lock_retry_remap; - rl = NULL; - } else if (!rl) - up_read(&ni->runlist.lock); - /* - * Failed to map the buffer, even after - * retrying. - */ - if (!err) - err = -EIO; - bh->b_blocknr = -1; - ntfs_error(vol->sb, "Failed to write to inode " - "0x%lx, attribute type 0x%x, " - "vcn 0x%llx, offset 0x%x " - "because its location on disk " - "could not be determined%s " - "(error code %i).", - ni->mft_no, ni->type, - (unsigned long long)vcn, - vcn_ofs, is_retry ? " even " - "after retrying" : "", err); - goto err_out; - } - /* We now have a successful remap, i.e. lcn >= 0. */ - - /* Setup buffer head to correct block. */ - bh->b_blocknr = ((lcn << vol->cluster_size_bits) - + vcn_ofs) >> blocksize_bits; - set_buffer_mapped(bh); - - // FIXME: Something analogous to this is needed for - // each newly allocated block, i.e. BH_New. - // FIXME: Might need to take this out of the - // if (!buffer_mapped(bh)) {}, depending on how we - // implement things during the allocated_size and - // initialized_size extension code above. - if (buffer_new(bh)) { - clear_buffer_new(bh); - unmap_underlying_metadata(bh->b_bdev, - bh->b_blocknr); - if (PageUptodate(page)) { - set_buffer_uptodate(bh); - continue; - } - /* - * Page is _not_ uptodate, zero surrounding - * region. NOTE: This is how we decide if to - * zero or not! - */ - if (block_end > to || block_start < from) { - void *kaddr; - - kaddr = kmap_atomic(page, KM_USER0); - if (block_end > to) - memset(kaddr + to, 0, - block_end - to); - if (block_start < from) - memset(kaddr + block_start, 0, - from - - block_start); - flush_dcache_page(page); - kunmap_atomic(kaddr, KM_USER0); - } - continue; - } - } - /* @bh is mapped, set it uptodate if the page is uptodate. */ - if (PageUptodate(page)) { - if (!buffer_uptodate(bh)) - set_buffer_uptodate(bh); - continue; - } - /* - * The page is not uptodate. The buffer is mapped. If it is not - * uptodate, and it is only partially being written to, we need - * to read the buffer in before the write, i.e. right now. - */ - if (!buffer_uptodate(bh) && - (block_start < from || block_end > to)) { - ll_rw_block(READ, 1, &bh); - *wait_bh++ = bh; - } - } while (block++, block_start = block_end, - (bh = bh->b_this_page) != head); - - /* Release the lock if we took it. */ - if (rl) { - up_read(&ni->runlist.lock); - rl = NULL; - } - - /* If we issued read requests, let them complete. */ - while (wait_bh > wait) { - wait_on_buffer(*--wait_bh); - if (!buffer_uptodate(*wait_bh)) - return -EIO; - } - - ntfs_debug("Done."); - return 0; -err_out: - /* - * Zero out any newly allocated blocks to avoid exposing stale data. - * If BH_New is set, we know that the block was newly allocated in the - * above loop. - * FIXME: What about initialized_size increments? Have we done all the - * required zeroing above? If not this error handling is broken, and - * in particular the if (block_end <= from) check is completely bogus. - */ - bh = head; - block_start = 0; - is_retry = FALSE; - do { - block_end = block_start + blocksize; - if (block_end <= from) - continue; - if (block_start >= to) - break; - if (buffer_new(bh)) { - void *kaddr; - - clear_buffer_new(bh); - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + block_start, 0, bh->b_size); - kunmap_atomic(kaddr, KM_USER0); - set_buffer_uptodate(bh); - mark_buffer_dirty(bh); - is_retry = TRUE; - } - } while (block_start = block_end, (bh = bh->b_this_page) != head); - if (is_retry) - flush_dcache_page(page); - if (rl) - up_read(&ni->runlist.lock); - return err; -} - -/** - * ntfs_prepare_write - prepare a page for receiving data - * - * This is called from generic_file_write() with i_sem held on the inode - * (@page->mapping->host). The @page is locked but not kmap()ped. The source - * data has not yet been copied into the @page. - * - * Need to extend the attribute/fill in holes if necessary, create blocks and - * make partially overwritten blocks uptodate, - * - * i_size is not to be modified yet. - * - * Return 0 on success or -errno on error. - * - * Should be using block_prepare_write() [support for sparse files] or - * cont_prepare_write() [no support for sparse files]. Cannot do that due to - * ntfs specifics but can look at them for implementation guidance. - * - * Note: In the range, @from is inclusive and @to is exclusive, i.e. @from is - * the first byte in the page that will be written to and @to is the first byte - * after the last byte that will be written to. - */ -static int ntfs_prepare_write(struct file *file, struct page *page, - unsigned from, unsigned to) -{ - s64 new_size; - loff_t i_size; - struct inode *vi = page->mapping->host; - ntfs_inode *base_ni = NULL, *ni = NTFS_I(vi); - ntfs_volume *vol = ni->vol; - ntfs_attr_search_ctx *ctx = NULL; - MFT_RECORD *m = NULL; - ATTR_RECORD *a; - u8 *kaddr; - u32 attr_len; - int err; - - ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index " - "0x%lx, from = %u, to = %u.", vi->i_ino, ni->type, - page->index, from, to); - BUG_ON(!PageLocked(page)); - BUG_ON(from > PAGE_CACHE_SIZE); - BUG_ON(to > PAGE_CACHE_SIZE); - BUG_ON(from > to); - BUG_ON(NInoMstProtected(ni)); - /* - * If a previous ntfs_truncate() failed, repeat it and abort if it - * fails again. - */ - if (unlikely(NInoTruncateFailed(ni))) { - down_write(&vi->i_alloc_sem); - err = ntfs_truncate(vi); - up_write(&vi->i_alloc_sem); - if (err || NInoTruncateFailed(ni)) { - if (!err) - err = -EIO; - goto err_out; - } - } - /* If the attribute is not resident, deal with it elsewhere. */ - if (NInoNonResident(ni)) { - /* - * Only unnamed $DATA attributes can be compressed, encrypted, - * and/or sparse. - */ - if (ni->type == AT_DATA && !ni->name_len) { - /* If file is encrypted, deny access, just like NT4. */ - if (NInoEncrypted(ni)) { - ntfs_debug("Denying write access to encrypted " - "file."); - return -EACCES; - } - /* Compressed data streams are handled in compress.c. */ - if (NInoCompressed(ni)) { - // TODO: Implement and replace this check with - // return ntfs_write_compressed_block(page); - ntfs_error(vi->i_sb, "Writing to compressed " - "files is not supported yet. " - "Sorry."); - return -EOPNOTSUPP; - } - // TODO: Implement and remove this check. - if (NInoSparse(ni)) { - ntfs_error(vi->i_sb, "Writing to sparse files " - "is not supported yet. Sorry."); - return -EOPNOTSUPP; - } - } - /* Normal data stream. */ - return ntfs_prepare_nonresident_write(page, from, to); - } - /* - * Attribute is resident, implying it is not compressed, encrypted, or - * sparse. - */ - BUG_ON(page_has_buffers(page)); - new_size = ((s64)page->index << PAGE_CACHE_SHIFT) + to; - /* If we do not need to resize the attribute allocation we are done. */ - if (new_size <= i_size_read(vi)) - goto done; - /* Map, pin, and lock the (base) mft record. */ - if (!NInoAttr(ni)) - base_ni = ni; - else - base_ni = ni->ext.base_ntfs_ino; - m = map_mft_record(base_ni); - if (IS_ERR(m)) { - err = PTR_ERR(m); - m = NULL; - ctx = NULL; - goto err_out; - } - ctx = ntfs_attr_get_search_ctx(base_ni, m); - if (unlikely(!ctx)) { - err = -ENOMEM; - goto err_out; - } - err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, - CASE_SENSITIVE, 0, NULL, 0, ctx); - if (unlikely(err)) { - if (err == -ENOENT) - err = -EIO; - goto err_out; - } - m = ctx->mrec; - a = ctx->attr; - /* The total length of the attribute value. */ - attr_len = le32_to_cpu(a->data.resident.value_length); - /* Fix an eventual previous failure of ntfs_commit_write(). */ - i_size = i_size_read(vi); - if (unlikely(attr_len > i_size)) { - attr_len = i_size; - a->data.resident.value_length = cpu_to_le32(attr_len); - } - /* If we do not need to resize the attribute allocation we are done. */ - if (new_size <= attr_len) - goto done_unm; - /* Check if new size is allowed in $AttrDef. */ - err = ntfs_attr_size_bounds_check(vol, ni->type, new_size); - if (unlikely(err)) { - if (err == -ERANGE) { - ntfs_error(vol->sb, "Write would cause the inode " - "0x%lx to exceed the maximum size for " - "its attribute type (0x%x). Aborting " - "write.", vi->i_ino, - le32_to_cpu(ni->type)); - } else { - ntfs_error(vol->sb, "Inode 0x%lx has unknown " - "attribute type 0x%x. Aborting " - "write.", vi->i_ino, - le32_to_cpu(ni->type)); - err = -EIO; - } - goto err_out2; - } - /* - * Extend the attribute record to be able to store the new attribute - * size. - */ - if (new_size >= vol->mft_record_size || ntfs_attr_record_resize(m, a, - le16_to_cpu(a->data.resident.value_offset) + - new_size)) { - /* Not enough space in the mft record. */ - ntfs_error(vol->sb, "Not enough space in the mft record for " - "the resized attribute value. This is not " - "supported yet. Aborting write."); - err = -EOPNOTSUPP; - goto err_out2; - } - /* - * We have enough space in the mft record to fit the write. This - * implies the attribute is smaller than the mft record and hence the - * attribute must be in a single page and hence page->index must be 0. - */ - BUG_ON(page->index); - /* - * If the beginning of the write is past the old size, enlarge the - * attribute value up to the beginning of the write and fill it with - * zeroes. - */ - if (from > attr_len) { - memset((u8*)a + le16_to_cpu(a->data.resident.value_offset) + - attr_len, 0, from - attr_len); - a->data.resident.value_length = cpu_to_le32(from); - /* Zero the corresponding area in the page as well. */ - if (PageUptodate(page)) { - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + attr_len, 0, from - attr_len); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); - } - } - flush_dcache_mft_record_page(ctx->ntfs_ino); - mark_mft_record_dirty(ctx->ntfs_ino); -done_unm: - ntfs_attr_put_search_ctx(ctx); - unmap_mft_record(base_ni); - /* - * Because resident attributes are handled by memcpy() to/from the - * corresponding MFT record, and because this form of i/o is byte - * aligned rather than block aligned, there is no need to bring the - * page uptodate here as in the non-resident case where we need to - * bring the buffers straddled by the write uptodate before - * generic_file_write() does the copying from userspace. - * - * We thus defer the uptodate bringing of the page region outside the - * region written to to ntfs_commit_write(), which makes the code - * simpler and saves one atomic kmap which is good. - */ -done: - ntfs_debug("Done."); - return 0; -err_out: - if (err == -ENOMEM) - ntfs_warning(vi->i_sb, "Error allocating memory required to " - "prepare the write."); - else { - ntfs_error(vi->i_sb, "Resident attribute prepare write failed " - "with error %i.", err); - NVolSetErrors(vol); - make_bad_inode(vi); - } -err_out2: - if (ctx) - ntfs_attr_put_search_ctx(ctx); - if (m) - unmap_mft_record(base_ni); - return err; -} - -/** - * ntfs_commit_nonresident_write - - * - */ -static int ntfs_commit_nonresident_write(struct page *page, - unsigned from, unsigned to) -{ - s64 pos = ((s64)page->index << PAGE_CACHE_SHIFT) + to; - struct inode *vi = page->mapping->host; - struct buffer_head *bh, *head; - unsigned int block_start, block_end, blocksize; - BOOL partial; - - ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index " - "0x%lx, from = %u, to = %u.", vi->i_ino, - NTFS_I(vi)->type, page->index, from, to); - blocksize = 1 << vi->i_blkbits; - - // FIXME: We need a whole slew of special cases in here for compressed - // files for example... - // For now, we know ntfs_prepare_write() would have failed so we can't - // get here in any of the cases which we have to special case, so we - // are just a ripped off, unrolled generic_commit_write(). - - bh = head = page_buffers(page); - block_start = 0; - partial = FALSE; - do { - block_end = block_start + blocksize; - if (block_end <= from || block_start >= to) { - if (!buffer_uptodate(bh)) - partial = TRUE; - } else { - set_buffer_uptodate(bh); - mark_buffer_dirty(bh); - } - } while (block_start = block_end, (bh = bh->b_this_page) != head); - /* - * If this is a partial write which happened to make all buffers - * uptodate then we can optimize away a bogus ->readpage() for the next - * read(). Here we 'discover' whether the page went uptodate as a - * result of this (potentially partial) write. - */ - if (!partial) - SetPageUptodate(page); - /* - * Not convinced about this at all. See disparity comment above. For - * now we know ntfs_prepare_write() would have failed in the write - * exceeds i_size case, so this will never trigger which is fine. - */ - if (pos > i_size_read(vi)) { - ntfs_error(vi->i_sb, "Writing beyond the existing file size is " - "not supported yet. Sorry."); - return -EOPNOTSUPP; - // vi->i_size = pos; - // mark_inode_dirty(vi); - } - ntfs_debug("Done."); - return 0; -} - -/** - * ntfs_commit_write - commit the received data - * - * This is called from generic_file_write() with i_sem held on the inode - * (@page->mapping->host). The @page is locked but not kmap()ped. The source - * data has already been copied into the @page. ntfs_prepare_write() has been - * called before the data copied and it returned success so we can take the - * results of various BUG checks and some error handling for granted. - * - * Need to mark modified blocks dirty so they get written out later when - * ntfs_writepage() is invoked by the VM. - * - * Return 0 on success or -errno on error. - * - * Should be using generic_commit_write(). This marks buffers uptodate and - * dirty, sets the page uptodate if all buffers in the page are uptodate, and - * updates i_size if the end of io is beyond i_size. In that case, it also - * marks the inode dirty. - * - * Cannot use generic_commit_write() due to ntfs specialities but can look at - * it for implementation guidance. - * - * If things have gone as outlined in ntfs_prepare_write(), then we do not - * need to do any page content modifications here at all, except in the write - * to resident attribute case, where we need to do the uptodate bringing here - * which we combine with the copying into the mft record which means we save - * one atomic kmap. - */ -static int ntfs_commit_write(struct file *file, struct page *page, - unsigned from, unsigned to) -{ - struct inode *vi = page->mapping->host; - ntfs_inode *base_ni, *ni = NTFS_I(vi); - char *kaddr, *kattr; - ntfs_attr_search_ctx *ctx; - MFT_RECORD *m; - ATTR_RECORD *a; - u32 attr_len; - int err; - - ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, page index " - "0x%lx, from = %u, to = %u.", vi->i_ino, ni->type, - page->index, from, to); - /* If the attribute is not resident, deal with it elsewhere. */ - if (NInoNonResident(ni)) { - /* Only unnamed $DATA attributes can be compressed/encrypted. */ - if (ni->type == AT_DATA && !ni->name_len) { - /* Encrypted files need separate handling. */ - if (NInoEncrypted(ni)) { - // We never get here at present! - BUG(); - } - /* Compressed data streams are handled in compress.c. */ - if (NInoCompressed(ni)) { - // TODO: Implement this! - // return ntfs_write_compressed_block(page); - // We never get here at present! - BUG(); - } - } - /* Normal data stream. */ - return ntfs_commit_nonresident_write(page, from, to); - } - /* - * Attribute is resident, implying it is not compressed, encrypted, or - * sparse. - */ - if (!NInoAttr(ni)) - base_ni = ni; - else - base_ni = ni->ext.base_ntfs_ino; - /* Map, pin, and lock the mft record. */ - m = map_mft_record(base_ni); - if (IS_ERR(m)) { - err = PTR_ERR(m); - m = NULL; - ctx = NULL; - goto err_out; - } - ctx = ntfs_attr_get_search_ctx(base_ni, m); - if (unlikely(!ctx)) { - err = -ENOMEM; - goto err_out; - } - err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, - CASE_SENSITIVE, 0, NULL, 0, ctx); - if (unlikely(err)) { - if (err == -ENOENT) - err = -EIO; - goto err_out; - } - a = ctx->attr; - /* The total length of the attribute value. */ - attr_len = le32_to_cpu(a->data.resident.value_length); - BUG_ON(from > attr_len); - kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset); - kaddr = kmap_atomic(page, KM_USER0); - /* Copy the received data from the page to the mft record. */ - memcpy(kattr + from, kaddr + from, to - from); - /* Update the attribute length if necessary. */ - if (to > attr_len) { - attr_len = to; - a->data.resident.value_length = cpu_to_le32(attr_len); - } - /* - * If the page is not uptodate, bring the out of bounds area(s) - * uptodate by copying data from the mft record to the page. - */ - if (!PageUptodate(page)) { - if (from > 0) - memcpy(kaddr, kattr, from); - if (to < attr_len) - memcpy(kaddr + to, kattr + to, attr_len - to); - /* Zero the region outside the end of the attribute value. */ - if (attr_len < PAGE_CACHE_SIZE) - memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len); - /* - * The probability of not having done any of the above is - * extremely small, so we just flush unconditionally. - */ - flush_dcache_page(page); - SetPageUptodate(page); - } - kunmap_atomic(kaddr, KM_USER0); - /* Update i_size if necessary. */ - if (i_size_read(vi) < attr_len) { - unsigned long flags; - - write_lock_irqsave(&ni->size_lock, flags); - ni->allocated_size = ni->initialized_size = attr_len; - i_size_write(vi, attr_len); - write_unlock_irqrestore(&ni->size_lock, flags); - } - /* Mark the mft record dirty, so it gets written back. */ - flush_dcache_mft_record_page(ctx->ntfs_ino); - mark_mft_record_dirty(ctx->ntfs_ino); - ntfs_attr_put_search_ctx(ctx); - unmap_mft_record(base_ni); - ntfs_debug("Done."); - return 0; -err_out: - if (err == -ENOMEM) { - ntfs_warning(vi->i_sb, "Error allocating memory required to " - "commit the write."); - if (PageUptodate(page)) { - ntfs_warning(vi->i_sb, "Page is uptodate, setting " - "dirty so the write will be retried " - "later on by the VM."); - /* - * Put the page on mapping->dirty_pages, but leave its - * buffers' dirty state as-is. - */ - __set_page_dirty_nobuffers(page); - err = 0; - } else - ntfs_error(vi->i_sb, "Page is not uptodate. Written " - "data has been lost."); - } else { - ntfs_error(vi->i_sb, "Resident attribute commit write failed " - "with error %i.", err); - NVolSetErrors(ni->vol); - make_bad_inode(vi); - } - if (ctx) - ntfs_attr_put_search_ctx(ctx); - if (m) - unmap_mft_record(base_ni); - return err; -} - #endif /* NTFS_RW */ /** @@ -2377,9 +1552,6 @@ struct address_space_operations ntfs_aops = { disk request queue. */ #ifdef NTFS_RW .writepage = ntfs_writepage, /* Write dirty page to disk. */ - .prepare_write = ntfs_prepare_write, /* Prepare page and buffers - ready to receive data. */ - .commit_write = ntfs_commit_write, /* Commit received data. */ #endif /* NTFS_RW */ }; diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c index 3f9a4ff42ee..eda056bac25 100644 --- a/fs/ntfs/attrib.c +++ b/fs/ntfs/attrib.c @@ -21,7 +21,9 @@ */ #include <linux/buffer_head.h> +#include <linux/sched.h> #include <linux/swap.h> +#include <linux/writeback.h> #include "attrib.h" #include "debug.h" @@ -36,9 +38,27 @@ * ntfs_map_runlist_nolock - map (a part of) a runlist of an ntfs inode * @ni: ntfs inode for which to map (part of) a runlist * @vcn: map runlist part containing this vcn + * @ctx: active attribute search context if present or NULL if not * * Map the part of a runlist containing the @vcn of the ntfs inode @ni. * + * If @ctx is specified, it is an active search context of @ni and its base mft + * record. This is needed when ntfs_map_runlist_nolock() encounters unmapped + * runlist fragments and allows their mapping. If you do not have the mft + * record mapped, you can specify @ctx as NULL and ntfs_map_runlist_nolock() + * will perform the necessary mapping and unmapping. + * + * Note, ntfs_map_runlist_nolock() saves the state of @ctx on entry and + * restores it before returning. Thus, @ctx will be left pointing to the same + * attribute on return as on entry. However, the actual pointers in @ctx may + * point to different memory locations on return, so you must remember to reset + * any cached pointers from the @ctx, i.e. after the call to + * ntfs_map_runlist_nolock(), you will probably want to do: + * m = ctx->mrec; + * a = ctx->attr; + * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that + * you cache ctx->mrec in a variable @m of type MFT_RECORD *. + * * Return 0 on success and -errno on error. There is one special error code * which is not an error as such. This is -ENOENT. It means that @vcn is out * of bounds of the runlist. @@ -46,19 +66,32 @@ * Note the runlist can be NULL after this function returns if @vcn is zero and * the attribute has zero allocated size, i.e. there simply is no runlist. * - * Locking: - The runlist must be locked for writing. - * - This function modifies the runlist. + * WARNING: If @ctx is supplied, regardless of whether success or failure is + * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx + * is no longer valid, i.e. you need to either call + * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it. + * In that case PTR_ERR(@ctx->mrec) will give you the error code for + * why the mapping of the old inode failed. + * + * Locking: - The runlist described by @ni must be locked for writing on entry + * and is locked on return. Note the runlist will be modified. + * - If @ctx is NULL, the base mft record of @ni must not be mapped on + * entry and it will be left unmapped on return. + * - If @ctx is not NULL, the base mft record must be mapped on entry + * and it will be left mapped on return. */ -int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn) +int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, ntfs_attr_search_ctx *ctx) { VCN end_vcn; + unsigned long flags; ntfs_inode *base_ni; MFT_RECORD *m; ATTR_RECORD *a; - ntfs_attr_search_ctx *ctx; runlist_element *rl; - unsigned long flags; + struct page *put_this_page = NULL; int err = 0; + BOOL ctx_is_temporary, ctx_needs_reset; + ntfs_attr_search_ctx old_ctx = { NULL, }; ntfs_debug("Mapping runlist part containing vcn 0x%llx.", (unsigned long long)vcn); @@ -66,20 +99,77 @@ int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn) base_ni = ni; else base_ni = ni->ext.base_ntfs_ino; - m = map_mft_record(base_ni); - if (IS_ERR(m)) - return PTR_ERR(m); - ctx = ntfs_attr_get_search_ctx(base_ni, m); - if (unlikely(!ctx)) { - err = -ENOMEM; - goto err_out; + if (!ctx) { + ctx_is_temporary = ctx_needs_reset = TRUE; + m = map_mft_record(base_ni); + if (IS_ERR(m)) + return PTR_ERR(m); + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + } else { + VCN allocated_size_vcn; + + BUG_ON(IS_ERR(ctx->mrec)); + a = ctx->attr; + BUG_ON(!a->non_resident); + ctx_is_temporary = FALSE; + end_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn); + read_lock_irqsave(&ni->size_lock, flags); + allocated_size_vcn = ni->allocated_size >> + ni->vol->cluster_size_bits; + read_unlock_irqrestore(&ni->size_lock, flags); + if (!a->data.non_resident.lowest_vcn && end_vcn <= 0) + end_vcn = allocated_size_vcn - 1; + /* + * If we already have the attribute extent containing @vcn in + * @ctx, no need to look it up again. We slightly cheat in + * that if vcn exceeds the allocated size, we will refuse to + * map the runlist below, so there is definitely no need to get + * the right attribute extent. + */ + if (vcn >= allocated_size_vcn || (a->type == ni->type && + a->name_length == ni->name_len && + !memcmp((u8*)a + le16_to_cpu(a->name_offset), + ni->name, ni->name_len) && + sle64_to_cpu(a->data.non_resident.lowest_vcn) + <= vcn && end_vcn >= vcn)) + ctx_needs_reset = FALSE; + else { + /* Save the old search context. */ + old_ctx = *ctx; + /* + * If the currently mapped (extent) inode is not the + * base inode we will unmap it when we reinitialize the + * search context which means we need to get a + * reference to the page containing the mapped mft + * record so we do not accidentally drop changes to the + * mft record when it has not been marked dirty yet. + */ + if (old_ctx.base_ntfs_ino && old_ctx.ntfs_ino != + old_ctx.base_ntfs_ino) { + put_this_page = old_ctx.ntfs_ino->page; + page_cache_get(put_this_page); + } + /* + * Reinitialize the search context so we can lookup the + * needed attribute extent. + */ + ntfs_attr_reinit_search_ctx(ctx); + ctx_needs_reset = TRUE; + } } - err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, - CASE_SENSITIVE, vcn, NULL, 0, ctx); - if (unlikely(err)) { - if (err == -ENOENT) - err = -EIO; - goto err_out; + if (ctx_needs_reset) { + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, vcn, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + BUG_ON(!ctx->attr->non_resident); } a = ctx->attr; /* @@ -89,11 +179,9 @@ int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn) * ntfs_mapping_pairs_decompress() fails. */ end_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn) + 1; - if (unlikely(!a->data.non_resident.lowest_vcn && end_vcn <= 1)) { - read_lock_irqsave(&ni->size_lock, flags); - end_vcn = ni->allocated_size >> ni->vol->cluster_size_bits; - read_unlock_irqrestore(&ni->size_lock, flags); - } + if (!a->data.non_resident.lowest_vcn && end_vcn == 1) + end_vcn = sle64_to_cpu(a->data.non_resident.allocated_size) >> + ni->vol->cluster_size_bits; if (unlikely(vcn >= end_vcn)) { err = -ENOENT; goto err_out; @@ -104,9 +192,93 @@ int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn) else ni->runlist.rl = rl; err_out: - if (likely(ctx)) - ntfs_attr_put_search_ctx(ctx); - unmap_mft_record(base_ni); + if (ctx_is_temporary) { + if (likely(ctx)) + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + } else if (ctx_needs_reset) { + /* + * If there is no attribute list, restoring the search context + * is acomplished simply by copying the saved context back over + * the caller supplied context. If there is an attribute list, + * things are more complicated as we need to deal with mapping + * of mft records and resulting potential changes in pointers. + */ + if (NInoAttrList(base_ni)) { + /* + * If the currently mapped (extent) inode is not the + * one we had before, we need to unmap it and map the + * old one. + */ + if (ctx->ntfs_ino != old_ctx.ntfs_ino) { + /* + * If the currently mapped inode is not the + * base inode, unmap it. + */ + if (ctx->base_ntfs_ino && ctx->ntfs_ino != + ctx->base_ntfs_ino) { + unmap_extent_mft_record(ctx->ntfs_ino); + ctx->mrec = ctx->base_mrec; + BUG_ON(!ctx->mrec); + } + /* + * If the old mapped inode is not the base + * inode, map it. + */ + if (old_ctx.base_ntfs_ino && + old_ctx.ntfs_ino != + old_ctx.base_ntfs_ino) { +retry_map: + ctx->mrec = map_mft_record( + old_ctx.ntfs_ino); + /* + * Something bad has happened. If out + * of memory retry till it succeeds. + * Any other errors are fatal and we + * return the error code in ctx->mrec. + * Let the caller deal with it... We + * just need to fudge things so the + * caller can reinit and/or put the + * search context safely. + */ + if (IS_ERR(ctx->mrec)) { + if (PTR_ERR(ctx->mrec) == + -ENOMEM) { + schedule(); + goto retry_map; + } else + old_ctx.ntfs_ino = + old_ctx. + base_ntfs_ino; + } + } + } + /* Update the changed pointers in the saved context. */ + if (ctx->mrec != old_ctx.mrec) { + if (!IS_ERR(ctx->mrec)) + old_ctx.attr = (ATTR_RECORD*)( + (u8*)ctx->mrec + + ((u8*)old_ctx.attr - + (u8*)old_ctx.mrec)); + old_ctx.mrec = ctx->mrec; + } + } + /* Restore the search context to the saved one. */ + *ctx = old_ctx; + /* + * We drop the reference on the page we took earlier. In the + * case that IS_ERR(ctx->mrec) is true this means we might lose + * some changes to the mft record that had been made between + * the last time it was marked dirty/written out and now. This + * at this stage is not a problem as the mapping error is fatal + * enough that the mft record cannot be written out anyway and + * the caller is very likely to shutdown the whole inode + * immediately and mark the volume dirty for chkdsk to pick up + * the pieces anyway. + */ + if (put_this_page) + page_cache_release(put_this_page); + } return err; } @@ -122,8 +294,8 @@ err_out: * of bounds of the runlist. * * Locking: - The runlist must be unlocked on entry and is unlocked on return. - * - This function takes the runlist lock for writing and modifies the - * runlist. + * - This function takes the runlist lock for writing and may modify + * the runlist. */ int ntfs_map_runlist(ntfs_inode *ni, VCN vcn) { @@ -133,7 +305,7 @@ int ntfs_map_runlist(ntfs_inode *ni, VCN vcn) /* Make sure someone else didn't do the work while we were sleeping. */ if (likely(ntfs_rl_vcn_to_lcn(ni->runlist.rl, vcn) <= LCN_RL_NOT_MAPPED)) - err = ntfs_map_runlist_nolock(ni, vcn); + err = ntfs_map_runlist_nolock(ni, vcn, NULL); up_write(&ni->runlist.lock); return err; } @@ -212,7 +384,7 @@ retry_remap: goto retry_remap; } } - err = ntfs_map_runlist_nolock(ni, vcn); + err = ntfs_map_runlist_nolock(ni, vcn, NULL); if (!write_locked) { up_write(&ni->runlist.lock); down_read(&ni->runlist.lock); @@ -236,9 +408,9 @@ retry_remap: /** * ntfs_attr_find_vcn_nolock - find a vcn in the runlist of an ntfs inode - * @ni: ntfs inode describing the runlist to search - * @vcn: vcn to find - * @write_locked: true if the runlist is locked for writing + * @ni: ntfs inode describing the runlist to search + * @vcn: vcn to find + * @ctx: active attribute search context if present or NULL if not * * Find the virtual cluster number @vcn in the runlist described by the ntfs * inode @ni and return the address of the runlist element containing the @vcn. @@ -246,9 +418,22 @@ retry_remap: * If the @vcn is not mapped yet, the attempt is made to map the attribute * extent containing the @vcn and the vcn to lcn conversion is retried. * - * If @write_locked is true the caller has locked the runlist for writing and - * if false for reading. - * + * If @ctx is specified, it is an active search context of @ni and its base mft + * record. This is needed when ntfs_attr_find_vcn_nolock() encounters unmapped + * runlist fragments and allows their mapping. If you do not have the mft + * record mapped, you can specify @ctx as NULL and ntfs_attr_find_vcn_nolock() + * will perform the necessary mapping and unmapping. + * + * Note, ntfs_attr_find_vcn_nolock() saves the state of @ctx on entry and + * restores it before returning. Thus, @ctx will be left pointing to the same + * attribute on return as on entry. However, the actual pointers in @ctx may + * point to different memory locations on return, so you must remember to reset + * any cached pointers from the @ctx, i.e. after the call to + * ntfs_attr_find_vcn_nolock(), you will probably want to do: + * m = ctx->mrec; + * a = ctx->attr; + * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that + * you cache ctx->mrec in a variable @m of type MFT_RECORD *. * Note you need to distinguish between the lcn of the returned runlist element * being >= 0 and LCN_HOLE. In the later case you have to return zeroes on * read and allocate clusters on write. @@ -263,22 +448,31 @@ retry_remap: * -ENOMEM - Not enough memory to map runlist. * -EIO - Critical error (runlist/file is corrupt, i/o error, etc). * - * Locking: - The runlist must be locked on entry and is left locked on return. - * - If @write_locked is FALSE, i.e. the runlist is locked for reading, - * the lock may be dropped inside the function so you cannot rely on - * the runlist still being the same when this function returns. + * WARNING: If @ctx is supplied, regardless of whether success or failure is + * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx + * is no longer valid, i.e. you need to either call + * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it. + * In that case PTR_ERR(@ctx->mrec) will give you the error code for + * why the mapping of the old inode failed. + * + * Locking: - The runlist described by @ni must be locked for writing on entry + * and is locked on return. Note the runlist may be modified when + * needed runlist fragments need to be mapped. + * - If @ctx is NULL, the base mft record of @ni must not be mapped on + * entry and it will be left unmapped on return. + * - If @ctx is not NULL, the base mft record must be mapped on entry + * and it will be left mapped on return. */ runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, const VCN vcn, - const BOOL write_locked) + ntfs_attr_search_ctx *ctx) { unsigned long flags; runlist_element *rl; int err = 0; BOOL is_retry = FALSE; - ntfs_debug("Entering for i_ino 0x%lx, vcn 0x%llx, %s_locked.", - ni->mft_no, (unsigned long long)vcn, - write_locked ? "write" : "read"); + ntfs_debug("Entering for i_ino 0x%lx, vcn 0x%llx, with%s ctx.", + ni->mft_no, (unsigned long long)vcn, ctx ? "" : "out"); BUG_ON(!ni); BUG_ON(!NInoNonResident(ni)); BUG_ON(vcn < 0); @@ -312,33 +506,22 @@ retry_remap: } if (!err && !is_retry) { /* - * The @vcn is in an unmapped region, map the runlist and - * retry. + * If the search context is invalid we cannot map the unmapped + * region. */ - if (!write_locked) { - up_read(&ni->runlist.lock); - down_write(&ni->runlist.lock); - if (unlikely(ntfs_rl_vcn_to_lcn(ni->runlist.rl, vcn) != - LCN_RL_NOT_MAPPED)) { - up_write(&ni->runlist.lock); - down_read(&ni->runlist.lock); + if (IS_ERR(ctx->mrec)) + err = PTR_ERR(ctx->mrec); + else { + /* + * The @vcn is in an unmapped region, map the runlist + * and retry. + */ + err = ntfs_map_runlist_nolock(ni, vcn, ctx); + if (likely(!err)) { + is_retry = TRUE; goto retry_remap; } } - err = ntfs_map_runlist_nolock(ni, vcn); - if (!write_locked) { - up_write(&ni->runlist.lock); - down_read(&ni->runlist.lock); - } - if (likely(!err)) { - is_retry = TRUE; - goto retry_remap; - } - /* - * -EINVAL coming from a failed mapping attempt is equivalent - * to i/o error for us as it should not happen in our code - * paths. - */ if (err == -EINVAL) err = -EIO; } else if (!err) @@ -1011,6 +1194,7 @@ int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name, ntfs_inode *base_ni; ntfs_debug("Entering."); + BUG_ON(IS_ERR(ctx->mrec)); if (ctx->base_ntfs_ino) base_ni = ctx->base_ntfs_ino; else @@ -1227,7 +1411,7 @@ int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, const ATTR_TYPE type) */ int ntfs_attr_can_be_resident(const ntfs_volume *vol, const ATTR_TYPE type) { - if (type == AT_INDEX_ALLOCATION || type == AT_EA) + if (type == AT_INDEX_ALLOCATION) return -EPERM; return 0; } @@ -1319,10 +1503,17 @@ int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, /** * ntfs_attr_make_non_resident - convert a resident to a non-resident attribute * @ni: ntfs inode describing the attribute to convert + * @data_size: size of the resident data to copy to the non-resident attribute * * Convert the resident ntfs attribute described by the ntfs inode @ni to a * non-resident one. * + * @data_size must be equal to the attribute value size. This is needed since + * we need to know the size before we can map the mft record and our callers + * always know it. The reason we cannot simply read the size from the vfs + * inode i_size is that this is not necessarily uptodate. This happens when + * ntfs_attr_make_non_resident() is called in the ->truncate call path(s). + * * Return 0 on success and -errno on error. The following error return codes * are defined: * -EPERM - The attribute is not allowed to be non-resident. @@ -1343,7 +1534,7 @@ int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, * * Locking: - The caller must hold i_sem on the inode. */ -int ntfs_attr_make_non_resident(ntfs_inode *ni) +int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size) { s64 new_size; struct inode *vi = VFS_I(ni); @@ -1381,11 +1572,9 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni) * The size needs to be aligned to a cluster boundary for allocation * purposes. */ - new_size = (i_size_read(vi) + vol->cluster_size - 1) & + new_size = (data_size + vol->cluster_size - 1) & ~(vol->cluster_size - 1); if (new_size > 0) { - runlist_element *rl2; - /* * Will need the page later and since the page lock nests * outside all ntfs locks, we need to get the page now. @@ -1396,7 +1585,7 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni) return -ENOMEM; /* Start by allocating clusters to hold the attribute value. */ rl = ntfs_cluster_alloc(vol, 0, new_size >> - vol->cluster_size_bits, -1, DATA_ZONE); + vol->cluster_size_bits, -1, DATA_ZONE, TRUE); if (IS_ERR(rl)) { err = PTR_ERR(rl); ntfs_debug("Failed to allocate cluster%s, error code " @@ -1405,12 +1594,6 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni) err); goto page_err_out; } - /* Change the runlist terminator to LCN_ENOENT. */ - rl2 = rl; - while (rl2->length) - rl2++; - BUG_ON(rl2->lcn != LCN_RL_NOT_MAPPED); - rl2->lcn = LCN_ENOENT; } else { rl = NULL; page = NULL; @@ -1473,7 +1656,7 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni) * attribute value. */ attr_size = le32_to_cpu(a->data.resident.value_length); - BUG_ON(attr_size != i_size_read(vi)); + BUG_ON(attr_size != data_size); if (page && !PageUptodate(page)) { kaddr = kmap_atomic(page, KM_USER0); memcpy(kaddr, (u8*)a + @@ -1538,7 +1721,9 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni) ffs(ni->itype.compressed.block_size) - 1; ni->itype.compressed.block_clusters = 1U << a->data.non_resident.compression_unit; - } + vi->i_blocks = ni->itype.compressed.size >> 9; + } else + vi->i_blocks = ni->allocated_size >> 9; write_unlock_irqrestore(&ni->size_lock, flags); /* * This needs to be last since the address space operations ->readpage @@ -1652,6 +1837,640 @@ page_err_out: } /** + * ntfs_attr_extend_allocation - extend the allocated space of an attribute + * @ni: ntfs inode of the attribute whose allocation to extend + * @new_alloc_size: new size in bytes to which to extend the allocation to + * @new_data_size: new size in bytes to which to extend the data to + * @data_start: beginning of region which is required to be non-sparse + * + * Extend the allocated space of an attribute described by the ntfs inode @ni + * to @new_alloc_size bytes. If @data_start is -1, the whole extension may be + * implemented as a hole in the file (as long as both the volume and the ntfs + * inode @ni have sparse support enabled). If @data_start is >= 0, then the + * region between the old allocated size and @data_start - 1 may be made sparse + * but the regions between @data_start and @new_alloc_size must be backed by + * actual clusters. + * + * If @new_data_size is -1, it is ignored. If it is >= 0, then the data size + * of the attribute is extended to @new_data_size. Note that the i_size of the + * vfs inode is not updated. Only the data size in the base attribute record + * is updated. The caller has to update i_size separately if this is required. + * WARNING: It is a BUG() for @new_data_size to be smaller than the old data + * size as well as for @new_data_size to be greater than @new_alloc_size. + * + * For resident attributes this involves resizing the attribute record and if + * necessary moving it and/or other attributes into extent mft records and/or + * converting the attribute to a non-resident attribute which in turn involves + * extending the allocation of a non-resident attribute as described below. + * + * For non-resident attributes this involves allocating clusters in the data + * zone on the volume (except for regions that are being made sparse) and + * extending the run list to describe the allocated clusters as well as + * updating the mapping pairs array of the attribute. This in turn involves + * resizing the attribute record and if necessary moving it and/or other + * attributes into extent mft records and/or splitting the attribute record + * into multiple extent attribute records. + * + * Also, the attribute list attribute is updated if present and in some of the + * above cases (the ones where extent mft records/attributes come into play), + * an attribute list attribute is created if not already present. + * + * Return the new allocated size on success and -errno on error. In the case + * that an error is encountered but a partial extension at least up to + * @data_start (if present) is possible, the allocation is partially extended + * and this is returned. This means the caller must check the returned size to + * determine if the extension was partial. If @data_start is -1 then partial + * allocations are not performed. + * + * WARNING: Do not call ntfs_attr_extend_allocation() for $MFT/$DATA. + * + * Locking: This function takes the runlist lock of @ni for writing as well as + * locking the mft record of the base ntfs inode. These locks are maintained + * throughout execution of the function. These locks are required so that the + * attribute can be resized safely and so that it can for example be converted + * from resident to non-resident safely. + * + * TODO: At present attribute list attribute handling is not implemented. + * + * TODO: At present it is not safe to call this function for anything other + * than the $DATA attribute(s) of an uncompressed and unencrypted file. + */ +s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size, + const s64 new_data_size, const s64 data_start) +{ + VCN vcn; + s64 ll, allocated_size, start = data_start; + struct inode *vi = VFS_I(ni); + ntfs_volume *vol = ni->vol; + ntfs_inode *base_ni; + MFT_RECORD *m; + ATTR_RECORD *a; + ntfs_attr_search_ctx *ctx; + runlist_element *rl, *rl2; + unsigned long flags; + int err, mp_size; + u32 attr_len = 0; /* Silence stupid gcc warning. */ + BOOL mp_rebuilt; + +#ifdef NTFS_DEBUG + read_lock_irqsave(&ni->size_lock, flags); + allocated_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, " + "old_allocated_size 0x%llx, " + "new_allocated_size 0x%llx, new_data_size 0x%llx, " + "data_start 0x%llx.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), + (unsigned long long)allocated_size, + (unsigned long long)new_alloc_size, + (unsigned long long)new_data_size, + (unsigned long long)start); +#endif +retry_extend: + /* + * For non-resident attributes, @start and @new_size need to be aligned + * to cluster boundaries for allocation purposes. + */ + if (NInoNonResident(ni)) { + if (start > 0) + start &= ~(s64)vol->cluster_size_mask; + new_alloc_size = (new_alloc_size + vol->cluster_size - 1) & + ~(s64)vol->cluster_size_mask; + } + BUG_ON(new_data_size >= 0 && new_data_size > new_alloc_size); + /* Check if new size is allowed in $AttrDef. */ + err = ntfs_attr_size_bounds_check(vol, ni->type, new_alloc_size); + if (unlikely(err)) { + /* Only emit errors when the write will fail completely. */ + read_lock_irqsave(&ni->size_lock, flags); + allocated_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (start < 0 || start >= allocated_size) { + if (err == -ERANGE) { + ntfs_error(vol->sb, "Cannot extend allocation " + "of inode 0x%lx, attribute " + "type 0x%x, because the new " + "allocation would exceed the " + "maximum allowed size for " + "this attribute type.", + vi->i_ino, (unsigned) + le32_to_cpu(ni->type)); + } else { + ntfs_error(vol->sb, "Cannot extend allocation " + "of inode 0x%lx, attribute " + "type 0x%x, because this " + "attribute type is not " + "defined on the NTFS volume. " + "Possible corruption! You " + "should run chkdsk!", + vi->i_ino, (unsigned) + le32_to_cpu(ni->type)); + } + } + /* Translate error code to be POSIX conformant for write(2). */ + if (err == -ERANGE) + err = -EFBIG; + else + err = -EIO; + return err; + } + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + /* + * We will be modifying both the runlist (if non-resident) and the mft + * record so lock them both down. + */ + down_write(&ni->runlist.lock); + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + ctx = NULL; + goto err_out; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + read_lock_irqsave(&ni->size_lock, flags); + allocated_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + /* + * If non-resident, seek to the last extent. If resident, there is + * only one extent, so seek to that. + */ + vcn = NInoNonResident(ni) ? allocated_size >> vol->cluster_size_bits : + 0; + /* + * Abort if someone did the work whilst we waited for the locks. If we + * just converted the attribute from resident to non-resident it is + * likely that exactly this has happened already. We cannot quite + * abort if we need to update the data size. + */ + if (unlikely(new_alloc_size <= allocated_size)) { + ntfs_debug("Allocated size already exceeds requested size."); + new_alloc_size = allocated_size; + if (new_data_size < 0) + goto done; + /* + * We want the first attribute extent so that we can update the + * data size. + */ + vcn = 0; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, vcn, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + m = ctx->mrec; + a = ctx->attr; + /* Use goto to reduce indentation. */ + if (a->non_resident) + goto do_non_resident_extend; + BUG_ON(NInoNonResident(ni)); + /* The total length of the attribute value. */ + attr_len = le32_to_cpu(a->data.resident.value_length); + /* + * Extend the attribute record to be able to store the new attribute + * size. ntfs_attr_record_resize() will not do anything if the size is + * not changing. + */ + if (new_alloc_size < vol->mft_record_size && + !ntfs_attr_record_resize(m, a, + le16_to_cpu(a->data.resident.value_offset) + + new_alloc_size)) { + /* The resize succeeded! */ + write_lock_irqsave(&ni->size_lock, flags); + ni->allocated_size = le32_to_cpu(a->length) - + le16_to_cpu(a->data.resident.value_offset); + write_unlock_irqrestore(&ni->size_lock, flags); + if (new_data_size >= 0) { + BUG_ON(new_data_size < attr_len); + a->data.resident.value_length = + cpu_to_le32((u32)new_data_size); + } + goto flush_done; + } + /* + * We have to drop all the locks so we can call + * ntfs_attr_make_non_resident(). This could be optimised by try- + * locking the first page cache page and only if that fails dropping + * the locks, locking the page, and redoing all the locking and + * lookups. While this would be a huge optimisation, it is not worth + * it as this is definitely a slow code path. + */ + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); + /* + * Not enough space in the mft record, try to make the attribute + * non-resident and if successful restart the extension process. + */ + err = ntfs_attr_make_non_resident(ni, attr_len); + if (likely(!err)) + goto retry_extend; + /* + * Could not make non-resident. If this is due to this not being + * permitted for this attribute type or there not being enough space, + * try to make other attributes non-resident. Otherwise fail. + */ + if (unlikely(err != -EPERM && err != -ENOSPC)) { + /* Only emit errors when the write will fail completely. */ + read_lock_irqsave(&ni->size_lock, flags); + allocated_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation of " + "inode 0x%lx, attribute type 0x%x, " + "because the conversion from resident " + "to non-resident attribute failed " + "with error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + if (err != -ENOMEM) + err = -EIO; + goto conv_err_out; + } + /* TODO: Not implemented from here, abort. */ + read_lock_irqsave(&ni->size_lock, flags); + allocated_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (start < 0 || start >= allocated_size) { + if (err == -ENOSPC) + ntfs_error(vol->sb, "Not enough space in the mft " + "record/on disk for the non-resident " + "attribute value. This case is not " + "implemented yet."); + else /* if (err == -EPERM) */ + ntfs_error(vol->sb, "This attribute type may not be " + "non-resident. This case is not " + "implemented yet."); + } + err = -EOPNOTSUPP; + goto conv_err_out; +#if 0 + // TODO: Attempt to make other attributes non-resident. + if (!err) + goto do_resident_extend; + /* + * Both the attribute list attribute and the standard information + * attribute must remain in the base inode. Thus, if this is one of + * these attributes, we have to try to move other attributes out into + * extent mft records instead. + */ + if (ni->type == AT_ATTRIBUTE_LIST || + ni->type == AT_STANDARD_INFORMATION) { + // TODO: Attempt to move other attributes into extent mft + // records. + err = -EOPNOTSUPP; + if (!err) + goto do_resident_extend; + goto err_out; + } + // TODO: Attempt to move this attribute to an extent mft record, but + // only if it is not already the only attribute in an mft record in + // which case there would be nothing to gain. + err = -EOPNOTSUPP; + if (!err) + goto do_resident_extend; + /* There is nothing we can do to make enough space. )-: */ + goto err_out; +#endif +do_non_resident_extend: + BUG_ON(!NInoNonResident(ni)); + if (new_alloc_size == allocated_size) { + BUG_ON(vcn); + goto alloc_done; + } + /* + * If the data starts after the end of the old allocation, this is a + * $DATA attribute and sparse attributes are enabled on the volume and + * for this inode, then create a sparse region between the old + * allocated size and the start of the data. Otherwise simply proceed + * with filling the whole space between the old allocated size and the + * new allocated size with clusters. + */ + if ((start >= 0 && start <= allocated_size) || ni->type != AT_DATA || + !NVolSparseEnabled(vol) || NInoSparseDisabled(ni)) + goto skip_sparse; + // TODO: This is not implemented yet. We just fill in with real + // clusters for now... + ntfs_debug("Inserting holes is not-implemented yet. Falling back to " + "allocating real clusters instead."); +skip_sparse: + rl = ni->runlist.rl; + if (likely(rl)) { + /* Seek to the end of the runlist. */ + while (rl->length) + rl++; + } + /* If this attribute extent is not mapped, map it now. */ + if (unlikely(!rl || rl->lcn == LCN_RL_NOT_MAPPED || + (rl->lcn == LCN_ENOENT && rl > ni->runlist.rl && + (rl-1)->lcn == LCN_RL_NOT_MAPPED))) { + if (!rl && !allocated_size) + goto first_alloc; + rl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl); + if (IS_ERR(rl)) { + err = PTR_ERR(rl); + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation " + "of inode 0x%lx, attribute " + "type 0x%x, because the " + "mapping of a runlist " + "fragment failed with error " + "code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), + err); + if (err != -ENOMEM) + err = -EIO; + goto err_out; + } + ni->runlist.rl = rl; + /* Seek to the end of the runlist. */ + while (rl->length) + rl++; + } + /* + * We now know the runlist of the last extent is mapped and @rl is at + * the end of the runlist. We want to begin allocating clusters + * starting at the last allocated cluster to reduce fragmentation. If + * there are no valid LCNs in the attribute we let the cluster + * allocator choose the starting cluster. + */ + /* If the last LCN is a hole or simillar seek back to last real LCN. */ + while (rl->lcn < 0 && rl > ni->runlist.rl) + rl--; +first_alloc: + // FIXME: Need to implement partial allocations so at least part of the + // write can be performed when start >= 0. (Needed for POSIX write(2) + // conformance.) + rl2 = ntfs_cluster_alloc(vol, allocated_size >> vol->cluster_size_bits, + (new_alloc_size - allocated_size) >> + vol->cluster_size_bits, (rl && (rl->lcn >= 0)) ? + rl->lcn + rl->length : -1, DATA_ZONE, TRUE); + if (IS_ERR(rl2)) { + err = PTR_ERR(rl2); + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation of " + "inode 0x%lx, attribute type 0x%x, " + "because the allocation of clusters " + "failed with error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + if (err != -ENOMEM && err != -ENOSPC) + err = -EIO; + goto err_out; + } + rl = ntfs_runlists_merge(ni->runlist.rl, rl2); + if (IS_ERR(rl)) { + err = PTR_ERR(rl); + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation of " + "inode 0x%lx, attribute type 0x%x, " + "because the runlist merge failed " + "with error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + if (err != -ENOMEM) + err = -EIO; + if (ntfs_cluster_free_from_rl(vol, rl2)) { + ntfs_error(vol->sb, "Failed to release allocated " + "cluster(s) in error code path. Run " + "chkdsk to recover the lost " + "cluster(s)."); + NVolSetErrors(vol); + } + ntfs_free(rl2); + goto err_out; + } + ni->runlist.rl = rl; + ntfs_debug("Allocated 0x%llx clusters.", (long long)(new_alloc_size - + allocated_size) >> vol->cluster_size_bits); + /* Find the runlist element with which the attribute extent starts. */ + ll = sle64_to_cpu(a->data.non_resident.lowest_vcn); + rl2 = ntfs_rl_find_vcn_nolock(rl, ll); + BUG_ON(!rl2); + BUG_ON(!rl2->length); + BUG_ON(rl2->lcn < LCN_HOLE); + mp_rebuilt = FALSE; + /* Get the size for the new mapping pairs array for this extent. */ + mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1); + if (unlikely(mp_size <= 0)) { + err = mp_size; + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation of " + "inode 0x%lx, attribute type 0x%x, " + "because determining the size for the " + "mapping pairs failed with error code " + "%i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + err = -EIO; + goto undo_alloc; + } + /* Extend the attribute record to fit the bigger mapping pairs array. */ + attr_len = le32_to_cpu(a->length); + err = ntfs_attr_record_resize(m, a, mp_size + + le16_to_cpu(a->data.non_resident.mapping_pairs_offset)); + if (unlikely(err)) { + BUG_ON(err != -ENOSPC); + // TODO: Deal with this by moving this extent to a new mft + // record or by starting a new extent in a new mft record, + // possibly by extending this extent partially and filling it + // and creating a new extent for the remainder, or by making + // other attributes non-resident and/or by moving other + // attributes out of this mft record. + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Not enough space in the mft " + "record for the extended attribute " + "record. This case is not " + "implemented yet."); + err = -EOPNOTSUPP; + goto undo_alloc; + } + mp_rebuilt = TRUE; + /* Generate the mapping pairs array directly into the attr record. */ + err = ntfs_mapping_pairs_build(vol, (u8*)a + + le16_to_cpu(a->data.non_resident.mapping_pairs_offset), + mp_size, rl2, ll, -1, NULL); + if (unlikely(err)) { + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot extend allocation of " + "inode 0x%lx, attribute type 0x%x, " + "because building the mapping pairs " + "failed with error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + err = -EIO; + goto undo_alloc; + } + /* Update the highest_vcn. */ + a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >> + vol->cluster_size_bits) - 1); + /* + * We now have extended the allocated size of the attribute. Reflect + * this in the ntfs_inode structure and the attribute record. + */ + if (a->data.non_resident.lowest_vcn) { + /* + * We are not in the first attribute extent, switch to it, but + * first ensure the changes will make it to disk later. + */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + ntfs_attr_reinit_search_ctx(ctx); + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) + goto restore_undo_alloc; + /* @m is not used any more so no need to set it. */ + a = ctx->attr; + } + write_lock_irqsave(&ni->size_lock, flags); + ni->allocated_size = new_alloc_size; + a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size); + /* + * FIXME: This would fail if @ni is a directory, $MFT, or an index, + * since those can have sparse/compressed set. For example can be + * set compressed even though it is not compressed itself and in that + * case the bit means that files are to be created compressed in the + * directory... At present this is ok as this code is only called for + * regular files, and only for their $DATA attribute(s). + * FIXME: The calculation is wrong if we created a hole above. For now + * it does not matter as we never create holes. + */ + if (NInoSparse(ni) || NInoCompressed(ni)) { + ni->itype.compressed.size += new_alloc_size - allocated_size; + a->data.non_resident.compressed_size = + cpu_to_sle64(ni->itype.compressed.size); + vi->i_blocks = ni->itype.compressed.size >> 9; + } else + vi->i_blocks = new_alloc_size >> 9; + write_unlock_irqrestore(&ni->size_lock, flags); +alloc_done: + if (new_data_size >= 0) { + BUG_ON(new_data_size < + sle64_to_cpu(a->data.non_resident.data_size)); + a->data.non_resident.data_size = cpu_to_sle64(new_data_size); + } +flush_done: + /* Ensure the changes make it to disk. */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); +done: + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); + ntfs_debug("Done, new_allocated_size 0x%llx.", + (unsigned long long)new_alloc_size); + return new_alloc_size; +restore_undo_alloc: + if (start < 0 || start >= allocated_size) + ntfs_error(vol->sb, "Cannot complete extension of allocation " + "of inode 0x%lx, attribute type 0x%x, because " + "lookup of first attribute extent failed with " + "error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + if (err == -ENOENT) + err = -EIO; + ntfs_attr_reinit_search_ctx(ctx); + if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len, CASE_SENSITIVE, + allocated_size >> vol->cluster_size_bits, NULL, 0, + ctx)) { + ntfs_error(vol->sb, "Failed to find last attribute extent of " + "attribute in error code path. Run chkdsk to " + "recover."); + write_lock_irqsave(&ni->size_lock, flags); + ni->allocated_size = new_alloc_size; + /* + * FIXME: This would fail if @ni is a directory... See above. + * FIXME: The calculation is wrong if we created a hole above. + * For now it does not matter as we never create holes. + */ + if (NInoSparse(ni) || NInoCompressed(ni)) { + ni->itype.compressed.size += new_alloc_size - + allocated_size; + vi->i_blocks = ni->itype.compressed.size >> 9; + } else + vi->i_blocks = new_alloc_size >> 9; + write_unlock_irqrestore(&ni->size_lock, flags); + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); + /* + * The only thing that is now wrong is the allocated size of the + * base attribute extent which chkdsk should be able to fix. + */ + NVolSetErrors(vol); + return err; + } + ctx->attr->data.non_resident.highest_vcn = cpu_to_sle64( + (allocated_size >> vol->cluster_size_bits) - 1); +undo_alloc: + ll = allocated_size >> vol->cluster_size_bits; + if (ntfs_cluster_free(ni, ll, -1, ctx) < 0) { + ntfs_error(vol->sb, "Failed to release allocated cluster(s) " + "in error code path. Run chkdsk to recover " + "the lost cluster(s)."); + NVolSetErrors(vol); + } + m = ctx->mrec; + a = ctx->attr; + /* + * If the runlist truncation fails and/or the search context is no + * longer valid, we cannot resize the attribute record or build the + * mapping pairs array thus we mark the inode bad so that no access to + * the freed clusters can happen. + */ + if (ntfs_rl_truncate_nolock(vol, &ni->runlist, ll) || IS_ERR(m)) { + ntfs_error(vol->sb, "Failed to %s in error code path. Run " + "chkdsk to recover.", IS_ERR(m) ? + "restore attribute search context" : + "truncate attribute runlist"); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } else if (mp_rebuilt) { + if (ntfs_attr_record_resize(m, a, attr_len)) { + ntfs_error(vol->sb, "Failed to restore attribute " + "record in error code path. Run " + "chkdsk to recover."); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } else /* if (success) */ { + if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu( + a->data.non_resident. + mapping_pairs_offset), attr_len - + le16_to_cpu(a->data.non_resident. + mapping_pairs_offset), rl2, ll, -1, + NULL)) { + ntfs_error(vol->sb, "Failed to restore " + "mapping pairs array in error " + "code path. Run chkdsk to " + "recover."); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + } + } +err_out: + if (ctx) + ntfs_attr_put_search_ctx(ctx); + if (m) + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); +conv_err_out: + ntfs_debug("Failed. Returning error code %i.", err); + return err; +} + +/** * ntfs_attr_set - fill (a part of) an attribute with a byte * @ni: ntfs inode describing the attribute to fill * @ofs: offset inside the attribute at which to start to fill @@ -1773,6 +2592,8 @@ int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, const u8 val) /* Finally unlock and release the page. */ unlock_page(page); page_cache_release(page); + balance_dirty_pages_ratelimited(mapping); + cond_resched(); } /* If there is a last partial page, need to do it the slow way. */ if (end_ofs) { diff --git a/fs/ntfs/attrib.h b/fs/ntfs/attrib.h index 0618ed6fd7b..9074886b44b 100644 --- a/fs/ntfs/attrib.h +++ b/fs/ntfs/attrib.h @@ -60,14 +60,15 @@ typedef struct { ATTR_RECORD *base_attr; } ntfs_attr_search_ctx; -extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn); +extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, + ntfs_attr_search_ctx *ctx); extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn); extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn, const BOOL write_locked); extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, - const VCN vcn, const BOOL write_locked); + const VCN vcn, ntfs_attr_search_ctx *ctx); int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name, const u32 name_len, const IGNORE_CASE_BOOL ic, @@ -102,7 +103,10 @@ extern int ntfs_attr_record_resize(MFT_RECORD *m, ATTR_RECORD *a, u32 new_size); extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, const u32 new_size); -extern int ntfs_attr_make_non_resident(ntfs_inode *ni); +extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size); + +extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size, + const s64 new_data_size, const s64 data_start); extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, const u8 val); diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index be9fd1dd423..cf3e6ced2d0 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -19,11 +19,24 @@ * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#include <linux/pagemap.h> #include <linux/buffer_head.h> +#include <linux/pagemap.h> +#include <linux/pagevec.h> +#include <linux/sched.h> +#include <linux/swap.h> +#include <linux/uio.h> +#include <linux/writeback.h> +#include <asm/page.h> +#include <asm/uaccess.h> + +#include "attrib.h" +#include "bitmap.h" #include "inode.h" #include "debug.h" +#include "lcnalloc.h" +#include "malloc.h" +#include "mft.h" #include "ntfs.h" /** @@ -56,6 +69,2184 @@ static int ntfs_file_open(struct inode *vi, struct file *filp) #ifdef NTFS_RW /** + * ntfs_attr_extend_initialized - extend the initialized size of an attribute + * @ni: ntfs inode of the attribute to extend + * @new_init_size: requested new initialized size in bytes + * @cached_page: store any allocated but unused page here + * @lru_pvec: lru-buffering pagevec of the caller + * + * Extend the initialized size of an attribute described by the ntfs inode @ni + * to @new_init_size bytes. This involves zeroing any non-sparse space between + * the old initialized size and @new_init_size both in the page cache and on + * disk (if relevant complete pages are already uptodate in the page cache then + * these are simply marked dirty). + * + * As a side-effect, the file size (vfs inode->i_size) may be incremented as, + * in the resident attribute case, it is tied to the initialized size and, in + * the non-resident attribute case, it may not fall below the initialized size. + * + * Note that if the attribute is resident, we do not need to touch the page + * cache at all. This is because if the page cache page is not uptodate we + * bring it uptodate later, when doing the write to the mft record since we + * then already have the page mapped. And if the page is uptodate, the + * non-initialized region will already have been zeroed when the page was + * brought uptodate and the region may in fact already have been overwritten + * with new data via mmap() based writes, so we cannot just zero it. And since + * POSIX specifies that the behaviour of resizing a file whilst it is mmap()ped + * is unspecified, we choose not to do zeroing and thus we do not need to touch + * the page at all. For a more detailed explanation see ntfs_truncate() in + * fs/ntfs/inode.c. + * + * @cached_page and @lru_pvec are just optimizations for dealing with multiple + * pages. + * + * Return 0 on success and -errno on error. In the case that an error is + * encountered it is possible that the initialized size will already have been + * incremented some way towards @new_init_size but it is guaranteed that if + * this is the case, the necessary zeroing will also have happened and that all + * metadata is self-consistent. + * + * Locking: i_sem on the vfs inode corrseponsind to the ntfs inode @ni must be + * held by the caller. + */ +static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size, + struct page **cached_page, struct pagevec *lru_pvec) +{ + s64 old_init_size; + loff_t old_i_size; + pgoff_t index, end_index; + unsigned long flags; + struct inode *vi = VFS_I(ni); + ntfs_inode *base_ni; + MFT_RECORD *m = NULL; + ATTR_RECORD *a; + ntfs_attr_search_ctx *ctx = NULL; + struct address_space *mapping; + struct page *page = NULL; + u8 *kattr; + int err; + u32 attr_len; + + read_lock_irqsave(&ni->size_lock, flags); + old_init_size = ni->initialized_size; + old_i_size = i_size_read(vi); + BUG_ON(new_init_size > ni->allocated_size); + read_unlock_irqrestore(&ni->size_lock, flags); + ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, " + "old_initialized_size 0x%llx, " + "new_initialized_size 0x%llx, i_size 0x%llx.", + vi->i_ino, (unsigned)le32_to_cpu(ni->type), + (unsigned long long)old_init_size, + (unsigned long long)new_init_size, old_i_size); + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + /* Use goto to reduce indentation and we need the label below anyway. */ + if (NInoNonResident(ni)) + goto do_non_resident_extend; + BUG_ON(old_init_size != old_i_size); + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + goto err_out; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + m = ctx->mrec; + a = ctx->attr; + BUG_ON(a->non_resident); + /* The total length of the attribute value. */ + attr_len = le32_to_cpu(a->data.resident.value_length); + BUG_ON(old_i_size != (loff_t)attr_len); + /* + * Do the zeroing in the mft record and update the attribute size in + * the mft record. + */ + kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset); + memset(kattr + attr_len, 0, new_init_size - attr_len); + a->data.resident.value_length = cpu_to_le32((u32)new_init_size); + /* Finally, update the sizes in the vfs and ntfs inodes. */ + write_lock_irqsave(&ni->size_lock, flags); + i_size_write(vi, new_init_size); + ni->initialized_size = new_init_size; + write_unlock_irqrestore(&ni->size_lock, flags); + goto done; +do_non_resident_extend: + /* + * If the new initialized size @new_init_size exceeds the current file + * size (vfs inode->i_size), we need to extend the file size to the + * new initialized size. + */ + if (new_init_size > old_i_size) { + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + goto err_out; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + m = ctx->mrec; + a = ctx->attr; + BUG_ON(!a->non_resident); + BUG_ON(old_i_size != (loff_t) + sle64_to_cpu(a->data.non_resident.data_size)); + a->data.non_resident.data_size = cpu_to_sle64(new_init_size); + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + /* Update the file size in the vfs inode. */ + i_size_write(vi, new_init_size); + ntfs_attr_put_search_ctx(ctx); + ctx = NULL; + unmap_mft_record(base_ni); + m = NULL; + } + mapping = vi->i_mapping; + index = old_init_size >> PAGE_CACHE_SHIFT; + end_index = (new_init_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + do { + /* + * Read the page. If the page is not present, this will zero + * the uninitialized regions for us. + */ + page = read_cache_page(mapping, index, + (filler_t*)mapping->a_ops->readpage, NULL); + if (IS_ERR(page)) { + err = PTR_ERR(page); + goto init_err_out; + } + wait_on_page_locked(page); + if (unlikely(!PageUptodate(page) || PageError(page))) { + page_cache_release(page); + err = -EIO; + goto init_err_out; + } + /* + * Update the initialized size in the ntfs inode. This is + * enough to make ntfs_writepage() work. + */ + write_lock_irqsave(&ni->size_lock, flags); + ni->initialized_size = (index + 1) << PAGE_CACHE_SHIFT; + if (ni->initialized_size > new_init_size) + ni->initialized_size = new_init_size; + write_unlock_irqrestore(&ni->size_lock, flags); + /* Set the page dirty so it gets written out. */ + set_page_dirty(page); + page_cache_release(page); + /* + * Play nice with the vm and the rest of the system. This is + * very much needed as we can potentially be modifying the + * initialised size from a very small value to a really huge + * value, e.g. + * f = open(somefile, O_TRUNC); + * truncate(f, 10GiB); + * seek(f, 10GiB); + * write(f, 1); + * And this would mean we would be marking dirty hundreds of + * thousands of pages or as in the above example more than + * two and a half million pages! + * + * TODO: For sparse pages could optimize this workload by using + * the FsMisc / MiscFs page bit as a "PageIsSparse" bit. This + * would be set in readpage for sparse pages and here we would + * not need to mark dirty any pages which have this bit set. + * The only caveat is that we have to clear the bit everywhere + * where we allocate any clusters that lie in the page or that + * contain the page. + * + * TODO: An even greater optimization would be for us to only + * call readpage() on pages which are not in sparse regions as + * determined from the runlist. This would greatly reduce the + * number of pages we read and make dirty in the case of sparse + * files. + */ + balance_dirty_pages_ratelimited(mapping); + cond_resched(); + } while (++index < end_index); + read_lock_irqsave(&ni->size_lock, flags); + BUG_ON(ni->initialized_size != new_init_size); + read_unlock_irqrestore(&ni->size_lock, flags); + /* Now bring in sync the initialized_size in the mft record. */ + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + goto init_err_out; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto init_err_out; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto init_err_out; + } + m = ctx->mrec; + a = ctx->attr; + BUG_ON(!a->non_resident); + a->data.non_resident.initialized_size = cpu_to_sle64(new_init_size); +done: + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + if (ctx) + ntfs_attr_put_search_ctx(ctx); + if (m) + unmap_mft_record(base_ni); + ntfs_debug("Done, initialized_size 0x%llx, i_size 0x%llx.", + (unsigned long long)new_init_size, i_size_read(vi)); + return 0; +init_err_out: + write_lock_irqsave(&ni->size_lock, flags); + ni->initialized_size = old_init_size; + write_unlock_irqrestore(&ni->size_lock, flags); +err_out: + if (ctx) + ntfs_attr_put_search_ctx(ctx); + if (m) + unmap_mft_record(base_ni); + ntfs_debug("Failed. Returning error code %i.", err); + return err; +} + +/** + * ntfs_fault_in_pages_readable - + * + * Fault a number of userspace pages into pagetables. + * + * Unlike include/linux/pagemap.h::fault_in_pages_readable(), this one copes + * with more than two userspace pages as well as handling the single page case + * elegantly. + * + * If you find this difficult to understand, then think of the while loop being + * the following code, except that we do without the integer variable ret: + * + * do { + * ret = __get_user(c, uaddr); + * uaddr += PAGE_SIZE; + * } while (!ret && uaddr < end); + * + * Note, the final __get_user() may well run out-of-bounds of the user buffer, + * but _not_ out-of-bounds of the page the user buffer belongs to, and since + * this is only a read and not a write, and since it is still in the same page, + * it should not matter and this makes the code much simpler. + */ +static inline void ntfs_fault_in_pages_readable(const char __user *uaddr, + int bytes) +{ + const char __user *end; + volatile char c; + + /* Set @end to the first byte outside the last page we care about. */ + end = (const char __user*)PAGE_ALIGN((ptrdiff_t __user)uaddr + bytes); + + while (!__get_user(c, uaddr) && (uaddr += PAGE_SIZE, uaddr < end)) + ; +} + +/** + * ntfs_fault_in_pages_readable_iovec - + * + * Same as ntfs_fault_in_pages_readable() but operates on an array of iovecs. + */ +static inline void ntfs_fault_in_pages_readable_iovec(const struct iovec *iov, + size_t iov_ofs, int bytes) +{ + do { + const char __user *buf; + unsigned len; + + buf = iov->iov_base + iov_ofs; + len = iov->iov_len - iov_ofs; + if (len > bytes) + len = bytes; + ntfs_fault_in_pages_readable(buf, len); + bytes -= len; + iov++; + iov_ofs = 0; + } while (bytes); +} + +/** + * __ntfs_grab_cache_pages - obtain a number of locked pages + * @mapping: address space mapping from which to obtain page cache pages + * @index: starting index in @mapping at which to begin obtaining pages + * @nr_pages: number of page cache pages to obtain + * @pages: array of pages in which to return the obtained page cache pages + * @cached_page: allocated but as yet unused page + * @lru_pvec: lru-buffering pagevec of caller + * + * Obtain @nr_pages locked page cache pages from the mapping @maping and + * starting at index @index. + * + * If a page is newly created, increment its refcount and add it to the + * caller's lru-buffering pagevec @lru_pvec. + * + * This is the same as mm/filemap.c::__grab_cache_page(), except that @nr_pages + * are obtained at once instead of just one page and that 0 is returned on + * success and -errno on error. + * + * Note, the page locks are obtained in ascending page index order. + */ +static inline int __ntfs_grab_cache_pages(struct address_space *mapping, + pgoff_t index, const unsigned nr_pages, struct page **pages, + struct page **cached_page, struct pagevec *lru_pvec) +{ + int err, nr; + + BUG_ON(!nr_pages); + err = nr = 0; + do { + pages[nr] = find_lock_page(mapping, index); + if (!pages[nr]) { + if (!*cached_page) { + *cached_page = page_cache_alloc(mapping); + if (unlikely(!*cached_page)) { + err = -ENOMEM; + goto err_out; + } + } + err = add_to_page_cache(*cached_page, mapping, index, + GFP_KERNEL); + if (unlikely(err)) { + if (err == -EEXIST) + continue; + goto err_out; + } + pages[nr] = *cached_page; + page_cache_get(*cached_page); + if (unlikely(!pagevec_add(lru_pvec, *cached_page))) + __pagevec_lru_add(lru_pvec); + *cached_page = NULL; + } + index++; + nr++; + } while (nr < nr_pages); +out: + return err; +err_out: + while (nr > 0) { + unlock_page(pages[--nr]); + page_cache_release(pages[nr]); + } + goto out; +} + +static inline int ntfs_submit_bh_for_read(struct buffer_head *bh) +{ + lock_buffer(bh); + get_bh(bh); + bh->b_end_io = end_buffer_read_sync; + return submit_bh(READ, bh); +} + +/** + * ntfs_prepare_pages_for_non_resident_write - prepare pages for receiving data + * @pages: array of destination pages + * @nr_pages: number of pages in @pages + * @pos: byte position in file at which the write begins + * @bytes: number of bytes to be written + * + * This is called for non-resident attributes from ntfs_file_buffered_write() + * with i_sem held on the inode (@pages[0]->mapping->host). There are + * @nr_pages pages in @pages which are locked but not kmap()ped. The source + * data has not yet been copied into the @pages. + * + * Need to fill any holes with actual clusters, allocate buffers if necessary, + * ensure all the buffers are mapped, and bring uptodate any buffers that are + * only partially being written to. + * + * If @nr_pages is greater than one, we are guaranteed that the cluster size is + * greater than PAGE_CACHE_SIZE, that all pages in @pages are entirely inside + * the same cluster and that they are the entirety of that cluster, and that + * the cluster is sparse, i.e. we need to allocate a cluster to fill the hole. + * + * i_size is not to be modified yet. + * + * Return 0 on success or -errno on error. + */ +static int ntfs_prepare_pages_for_non_resident_write(struct page **pages, + unsigned nr_pages, s64 pos, size_t bytes) +{ + VCN vcn, highest_vcn = 0, cpos, cend, bh_cpos, bh_cend; + LCN lcn; + s64 bh_pos, vcn_len, end, initialized_size; + sector_t lcn_block; + struct page *page; + struct inode *vi; + ntfs_inode *ni, *base_ni = NULL; + ntfs_volume *vol; + runlist_element *rl, *rl2; + struct buffer_head *bh, *head, *wait[2], **wait_bh = wait; + ntfs_attr_search_ctx *ctx = NULL; + MFT_RECORD *m = NULL; + ATTR_RECORD *a = NULL; + unsigned long flags; + u32 attr_rec_len = 0; + unsigned blocksize, u; + int err, mp_size; + BOOL rl_write_locked, was_hole, is_retry; + unsigned char blocksize_bits; + struct { + u8 runlist_merged:1; + u8 mft_attr_mapped:1; + u8 mp_rebuilt:1; + u8 attr_switched:1; + } status = { 0, 0, 0, 0 }; + + BUG_ON(!nr_pages); + BUG_ON(!pages); + BUG_ON(!*pages); + vi = pages[0]->mapping->host; + ni = NTFS_I(vi); + vol = ni->vol; + ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page " + "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.", + vi->i_ino, ni->type, pages[0]->index, nr_pages, + (long long)pos, bytes); + blocksize_bits = vi->i_blkbits; + blocksize = 1 << blocksize_bits; + u = 0; + do { + struct page *page = pages[u]; + /* + * create_empty_buffers() will create uptodate/dirty buffers if + * the page is uptodate/dirty. + */ + if (!page_has_buffers(page)) { + create_empty_buffers(page, blocksize, 0); + if (unlikely(!page_has_buffers(page))) + return -ENOMEM; + } + } while (++u < nr_pages); + rl_write_locked = FALSE; + rl = NULL; + err = 0; + vcn = lcn = -1; + vcn_len = 0; + lcn_block = -1; + was_hole = FALSE; + cpos = pos >> vol->cluster_size_bits; + end = pos + bytes; + cend = (end + vol->cluster_size - 1) >> vol->cluster_size_bits; + /* + * Loop over each page and for each page over each buffer. Use goto to + * reduce indentation. + */ + u = 0; +do_next_page: + page = pages[u]; + bh_pos = (s64)page->index << PAGE_CACHE_SHIFT; + bh = head = page_buffers(page); + do { + VCN cdelta; + s64 bh_end; + unsigned bh_cofs; + + /* Clear buffer_new on all buffers to reinitialise state. */ + if (buffer_new(bh)) + clear_buffer_new(bh); + bh_end = bh_pos + blocksize; + bh_cpos = bh_pos >> vol->cluster_size_bits; + bh_cofs = bh_pos & vol->cluster_size_mask; + if (buffer_mapped(bh)) { + /* + * The buffer is already mapped. If it is uptodate, + * ignore it. + */ + if (buffer_uptodate(bh)) + continue; + /* + * The buffer is not uptodate. If the page is uptodate + * set the buffer uptodate and otherwise ignore it. + */ + if (PageUptodate(page)) { + set_buffer_uptodate(bh); + continue; + } + /* + * Neither the page nor the buffer are uptodate. If + * the buffer is only partially being written to, we + * need to read it in before the write, i.e. now. + */ + if ((bh_pos < pos && bh_end > pos) || + (bh_pos < end && bh_end > end)) { + /* + * If the buffer is fully or partially within + * the initialized size, do an actual read. + * Otherwise, simply zero the buffer. + */ + read_lock_irqsave(&ni->size_lock, flags); + initialized_size = ni->initialized_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (bh_pos < initialized_size) { + ntfs_submit_bh_for_read(bh); + *wait_bh++ = bh; + } else { + u8 *kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh), 0, + blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + } + continue; + } + /* Unmapped buffer. Need to map it. */ + bh->b_bdev = vol->sb->s_bdev; + /* + * If the current buffer is in the same clusters as the map + * cache, there is no need to check the runlist again. The + * map cache is made up of @vcn, which is the first cached file + * cluster, @vcn_len which is the number of cached file + * clusters, @lcn is the device cluster corresponding to @vcn, + * and @lcn_block is the block number corresponding to @lcn. + */ + cdelta = bh_cpos - vcn; + if (likely(!cdelta || (cdelta > 0 && cdelta < vcn_len))) { +map_buffer_cached: + BUG_ON(lcn < 0); + bh->b_blocknr = lcn_block + + (cdelta << (vol->cluster_size_bits - + blocksize_bits)) + + (bh_cofs >> blocksize_bits); + set_buffer_mapped(bh); + /* + * If the page is uptodate so is the buffer. If the + * buffer is fully outside the write, we ignore it if + * it was already allocated and we mark it dirty so it + * gets written out if we allocated it. On the other + * hand, if we allocated the buffer but we are not + * marking it dirty we set buffer_new so we can do + * error recovery. + */ + if (PageUptodate(page)) { + if (!buffer_uptodate(bh)) + set_buffer_uptodate(bh); + if (unlikely(was_hole)) { + /* We allocated the buffer. */ + unmap_underlying_metadata(bh->b_bdev, + bh->b_blocknr); + if (bh_end <= pos || bh_pos >= end) + mark_buffer_dirty(bh); + else + set_buffer_new(bh); + } + continue; + } + /* Page is _not_ uptodate. */ + if (likely(!was_hole)) { + /* + * Buffer was already allocated. If it is not + * uptodate and is only partially being written + * to, we need to read it in before the write, + * i.e. now. + */ + if (!buffer_uptodate(bh) && ((bh_pos < pos && + bh_end > pos) || + (bh_end > end && + bh_end > end))) { + /* + * If the buffer is fully or partially + * within the initialized size, do an + * actual read. Otherwise, simply zero + * the buffer. + */ + read_lock_irqsave(&ni->size_lock, + flags); + initialized_size = ni->initialized_size; + read_unlock_irqrestore(&ni->size_lock, + flags); + if (bh_pos < initialized_size) { + ntfs_submit_bh_for_read(bh); + *wait_bh++ = bh; + } else { + u8 *kaddr = kmap_atomic(page, + KM_USER0); + memset(kaddr + bh_offset(bh), + 0, blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + } + continue; + } + /* We allocated the buffer. */ + unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr); + /* + * If the buffer is fully outside the write, zero it, + * set it uptodate, and mark it dirty so it gets + * written out. If it is partially being written to, + * zero region surrounding the write but leave it to + * commit write to do anything else. Finally, if the + * buffer is fully being overwritten, do nothing. + */ + if (bh_end <= pos || bh_pos >= end) { + if (!buffer_uptodate(bh)) { + u8 *kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh), 0, + blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + mark_buffer_dirty(bh); + continue; + } + set_buffer_new(bh); + if (!buffer_uptodate(bh) && + (bh_pos < pos || bh_end > end)) { + u8 *kaddr; + unsigned pofs; + + kaddr = kmap_atomic(page, KM_USER0); + if (bh_pos < pos) { + pofs = bh_pos & ~PAGE_CACHE_MASK; + memset(kaddr + pofs, 0, pos - bh_pos); + } + if (bh_end > end) { + pofs = end & ~PAGE_CACHE_MASK; + memset(kaddr + pofs, 0, bh_end - end); + } + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + } + continue; + } + /* + * Slow path: this is the first buffer in the cluster. If it + * is outside allocated size and is not uptodate, zero it and + * set it uptodate. + */ + read_lock_irqsave(&ni->size_lock, flags); + initialized_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (bh_pos > initialized_size) { + if (PageUptodate(page)) { + if (!buffer_uptodate(bh)) + set_buffer_uptodate(bh); + } else if (!buffer_uptodate(bh)) { + u8 *kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh), 0, blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + continue; + } + is_retry = FALSE; + if (!rl) { + down_read(&ni->runlist.lock); +retry_remap: + rl = ni->runlist.rl; + } + if (likely(rl != NULL)) { + /* Seek to element containing target cluster. */ + while (rl->length && rl[1].vcn <= bh_cpos) + rl++; + lcn = ntfs_rl_vcn_to_lcn(rl, bh_cpos); + if (likely(lcn >= 0)) { + /* + * Successful remap, setup the map cache and + * use that to deal with the buffer. + */ + was_hole = FALSE; + vcn = bh_cpos; + vcn_len = rl[1].vcn - vcn; + lcn_block = lcn << (vol->cluster_size_bits - + blocksize_bits); + cdelta = 0; + /* + * If the number of remaining clusters in the + * @pages is smaller or equal to the number of + * cached clusters, unlock the runlist as the + * map cache will be used from now on. + */ + if (likely(vcn + vcn_len >= cend)) { + if (rl_write_locked) { + up_write(&ni->runlist.lock); + rl_write_locked = FALSE; + } else + up_read(&ni->runlist.lock); + rl = NULL; + } + goto map_buffer_cached; + } + } else + lcn = LCN_RL_NOT_MAPPED; + /* + * If it is not a hole and not out of bounds, the runlist is + * probably unmapped so try to map it now. + */ + if (unlikely(lcn != LCN_HOLE && lcn != LCN_ENOENT)) { + if (likely(!is_retry && lcn == LCN_RL_NOT_MAPPED)) { + /* Attempt to map runlist. */ + if (!rl_write_locked) { + /* + * We need the runlist locked for + * writing, so if it is locked for + * reading relock it now and retry in + * case it changed whilst we dropped + * the lock. + */ + up_read(&ni->runlist.lock); + down_write(&ni->runlist.lock); + rl_write_locked = TRUE; + goto retry_remap; + } + err = ntfs_map_runlist_nolock(ni, bh_cpos, + NULL); + if (likely(!err)) { + is_retry = TRUE; + goto retry_remap; + } + /* + * If @vcn is out of bounds, pretend @lcn is + * LCN_ENOENT. As long as the buffer is out + * of bounds this will work fine. + */ + if (err == -ENOENT) { + lcn = LCN_ENOENT; + err = 0; + goto rl_not_mapped_enoent; + } + } else + err = -EIO; + /* Failed to map the buffer, even after retrying. */ + bh->b_blocknr = -1; + ntfs_error(vol->sb, "Failed to write to inode 0x%lx, " + "attribute type 0x%x, vcn 0x%llx, " + "vcn offset 0x%x, because its " + "location on disk could not be " + "determined%s (error code %i).", + ni->mft_no, ni->type, + (unsigned long long)bh_cpos, + (unsigned)bh_pos & + vol->cluster_size_mask, + is_retry ? " even after retrying" : "", + err); + break; + } +rl_not_mapped_enoent: + /* + * The buffer is in a hole or out of bounds. We need to fill + * the hole, unless the buffer is in a cluster which is not + * touched by the write, in which case we just leave the buffer + * unmapped. This can only happen when the cluster size is + * less than the page cache size. + */ + if (unlikely(vol->cluster_size < PAGE_CACHE_SIZE)) { + bh_cend = (bh_end + vol->cluster_size - 1) >> + vol->cluster_size_bits; + if ((bh_cend <= cpos || bh_cpos >= cend)) { + bh->b_blocknr = -1; + /* + * If the buffer is uptodate we skip it. If it + * is not but the page is uptodate, we can set + * the buffer uptodate. If the page is not + * uptodate, we can clear the buffer and set it + * uptodate. Whether this is worthwhile is + * debatable and this could be removed. + */ + if (PageUptodate(page)) { + if (!buffer_uptodate(bh)) + set_buffer_uptodate(bh); + } else if (!buffer_uptodate(bh)) { + u8 *kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh), 0, + blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + continue; + } + } + /* + * Out of bounds buffer is invalid if it was not really out of + * bounds. + */ + BUG_ON(lcn != LCN_HOLE); + /* + * We need the runlist locked for writing, so if it is locked + * for reading relock it now and retry in case it changed + * whilst we dropped the lock. + */ + BUG_ON(!rl); + if (!rl_write_locked) { + up_read(&ni->runlist.lock); + down_write(&ni->runlist.lock); + rl_write_locked = TRUE; + goto retry_remap; + } + /* Find the previous last allocated cluster. */ + BUG_ON(rl->lcn != LCN_HOLE); + lcn = -1; + rl2 = rl; + while (--rl2 >= ni->runlist.rl) { + if (rl2->lcn >= 0) { + lcn = rl2->lcn + rl2->length; + break; + } + } + rl2 = ntfs_cluster_alloc(vol, bh_cpos, 1, lcn, DATA_ZONE, + FALSE); + if (IS_ERR(rl2)) { + err = PTR_ERR(rl2); + ntfs_debug("Failed to allocate cluster, error code %i.", + err); + break; + } + lcn = rl2->lcn; + rl = ntfs_runlists_merge(ni->runlist.rl, rl2); + if (IS_ERR(rl)) { + err = PTR_ERR(rl); + if (err != -ENOMEM) + err = -EIO; + if (ntfs_cluster_free_from_rl(vol, rl2)) { + ntfs_error(vol->sb, "Failed to release " + "allocated cluster in error " + "code path. Run chkdsk to " + "recover the lost cluster."); + NVolSetErrors(vol); + } + ntfs_free(rl2); + break; + } + ni->runlist.rl = rl; + status.runlist_merged = 1; + ntfs_debug("Allocated cluster, lcn 0x%llx.", lcn); + /* Map and lock the mft record and get the attribute record. */ + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + break; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + unmap_mft_record(base_ni); + break; + } + status.mft_attr_mapped = 1; + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, bh_cpos, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + break; + } + m = ctx->mrec; + a = ctx->attr; + /* + * Find the runlist element with which the attribute extent + * starts. Note, we cannot use the _attr_ version because we + * have mapped the mft record. That is ok because we know the + * runlist fragment must be mapped already to have ever gotten + * here, so we can just use the _rl_ version. + */ + vcn = sle64_to_cpu(a->data.non_resident.lowest_vcn); + rl2 = ntfs_rl_find_vcn_nolock(rl, vcn); + BUG_ON(!rl2); + BUG_ON(!rl2->length); + BUG_ON(rl2->lcn < LCN_HOLE); + highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn); + /* + * If @highest_vcn is zero, calculate the real highest_vcn + * (which can really be zero). + */ + if (!highest_vcn) + highest_vcn = (sle64_to_cpu( + a->data.non_resident.allocated_size) >> + vol->cluster_size_bits) - 1; + /* + * Determine the size of the mapping pairs array for the new + * extent, i.e. the old extent with the hole filled. + */ + mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, vcn, + highest_vcn); + if (unlikely(mp_size <= 0)) { + if (!(err = mp_size)) + err = -EIO; + ntfs_debug("Failed to get size for mapping pairs " + "array, error code %i.", err); + break; + } + /* + * Resize the attribute record to fit the new mapping pairs + * array. + */ + attr_rec_len = le32_to_cpu(a->length); + err = ntfs_attr_record_resize(m, a, mp_size + le16_to_cpu( + a->data.non_resident.mapping_pairs_offset)); + if (unlikely(err)) { + BUG_ON(err != -ENOSPC); + // TODO: Deal with this by using the current attribute + // and fill it with as much of the mapping pairs + // array as possible. Then loop over each attribute + // extent rewriting the mapping pairs arrays as we go + // along and if when we reach the end we have not + // enough space, try to resize the last attribute + // extent and if even that fails, add a new attribute + // extent. + // We could also try to resize at each step in the hope + // that we will not need to rewrite every single extent. + // Note, we may need to decompress some extents to fill + // the runlist as we are walking the extents... + ntfs_error(vol->sb, "Not enough space in the mft " + "record for the extended attribute " + "record. This case is not " + "implemented yet."); + err = -EOPNOTSUPP; + break ; + } + status.mp_rebuilt = 1; + /* + * Generate the mapping pairs array directly into the attribute + * record. + */ + err = ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu( + a->data.non_resident.mapping_pairs_offset), + mp_size, rl2, vcn, highest_vcn, NULL); + if (unlikely(err)) { + ntfs_error(vol->sb, "Cannot fill hole in inode 0x%lx, " + "attribute type 0x%x, because building " + "the mapping pairs failed with error " + "code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + err = -EIO; + break; + } + /* Update the highest_vcn but only if it was not set. */ + if (unlikely(!a->data.non_resident.highest_vcn)) + a->data.non_resident.highest_vcn = + cpu_to_sle64(highest_vcn); + /* + * If the attribute is sparse/compressed, update the compressed + * size in the ntfs_inode structure and the attribute record. + */ + if (likely(NInoSparse(ni) || NInoCompressed(ni))) { + /* + * If we are not in the first attribute extent, switch + * to it, but first ensure the changes will make it to + * disk later. + */ + if (a->data.non_resident.lowest_vcn) { + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + ntfs_attr_reinit_search_ctx(ctx); + err = ntfs_attr_lookup(ni->type, ni->name, + ni->name_len, CASE_SENSITIVE, + 0, NULL, 0, ctx); + if (unlikely(err)) { + status.attr_switched = 1; + break; + } + /* @m is not used any more so do not set it. */ + a = ctx->attr; + } + write_lock_irqsave(&ni->size_lock, flags); + ni->itype.compressed.size += vol->cluster_size; + a->data.non_resident.compressed_size = + cpu_to_sle64(ni->itype.compressed.size); + write_unlock_irqrestore(&ni->size_lock, flags); + } + /* Ensure the changes make it to disk. */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + /* Successfully filled the hole. */ + status.runlist_merged = 0; + status.mft_attr_mapped = 0; + status.mp_rebuilt = 0; + /* Setup the map cache and use that to deal with the buffer. */ + was_hole = TRUE; + vcn = bh_cpos; + vcn_len = 1; + lcn_block = lcn << (vol->cluster_size_bits - blocksize_bits); + cdelta = 0; + /* + * If the number of remaining clusters in the @pages is smaller + * or equal to the number of cached clusters, unlock the + * runlist as the map cache will be used from now on. + */ + if (likely(vcn + vcn_len >= cend)) { + up_write(&ni->runlist.lock); + rl_write_locked = FALSE; + rl = NULL; + } + goto map_buffer_cached; + } while (bh_pos += blocksize, (bh = bh->b_this_page) != head); + /* If there are no errors, do the next page. */ + if (likely(!err && ++u < nr_pages)) + goto do_next_page; + /* If there are no errors, release the runlist lock if we took it. */ + if (likely(!err)) { + if (unlikely(rl_write_locked)) { + up_write(&ni->runlist.lock); + rl_write_locked = FALSE; + } else if (unlikely(rl)) + up_read(&ni->runlist.lock); + rl = NULL; + } + /* If we issued read requests, let them complete. */ + read_lock_irqsave(&ni->size_lock, flags); + initialized_size = ni->initialized_size; + read_unlock_irqrestore(&ni->size_lock, flags); + while (wait_bh > wait) { + bh = *--wait_bh; + wait_on_buffer(bh); + if (likely(buffer_uptodate(bh))) { + page = bh->b_page; + bh_pos = ((s64)page->index << PAGE_CACHE_SHIFT) + + bh_offset(bh); + /* + * If the buffer overflows the initialized size, need + * to zero the overflowing region. + */ + if (unlikely(bh_pos + blocksize > initialized_size)) { + u8 *kaddr; + int ofs = 0; + + if (likely(bh_pos < initialized_size)) + ofs = initialized_size - bh_pos; + kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh) + ofs, 0, + blocksize - ofs); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + } + } else /* if (unlikely(!buffer_uptodate(bh))) */ + err = -EIO; + } + if (likely(!err)) { + /* Clear buffer_new on all buffers. */ + u = 0; + do { + bh = head = page_buffers(pages[u]); + do { + if (buffer_new(bh)) + clear_buffer_new(bh); + } while ((bh = bh->b_this_page) != head); + } while (++u < nr_pages); + ntfs_debug("Done."); + return err; + } + if (status.attr_switched) { + /* Get back to the attribute extent we modified. */ + ntfs_attr_reinit_search_ctx(ctx); + if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, bh_cpos, NULL, 0, ctx)) { + ntfs_error(vol->sb, "Failed to find required " + "attribute extent of attribute in " + "error code path. Run chkdsk to " + "recover."); + write_lock_irqsave(&ni->size_lock, flags); + ni->itype.compressed.size += vol->cluster_size; + write_unlock_irqrestore(&ni->size_lock, flags); + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + /* + * The only thing that is now wrong is the compressed + * size of the base attribute extent which chkdsk + * should be able to fix. + */ + NVolSetErrors(vol); + } else { + m = ctx->mrec; + a = ctx->attr; + status.attr_switched = 0; + } + } + /* + * If the runlist has been modified, need to restore it by punching a + * hole into it and we then need to deallocate the on-disk cluster as + * well. Note, we only modify the runlist if we are able to generate a + * new mapping pairs array, i.e. only when the mapped attribute extent + * is not switched. + */ + if (status.runlist_merged && !status.attr_switched) { + BUG_ON(!rl_write_locked); + /* Make the file cluster we allocated sparse in the runlist. */ + if (ntfs_rl_punch_nolock(vol, &ni->runlist, bh_cpos, 1)) { + ntfs_error(vol->sb, "Failed to punch hole into " + "attribute runlist in error code " + "path. Run chkdsk to recover the " + "lost cluster."); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } else /* if (success) */ { + status.runlist_merged = 0; + /* + * Deallocate the on-disk cluster we allocated but only + * if we succeeded in punching its vcn out of the + * runlist. + */ + down_write(&vol->lcnbmp_lock); + if (ntfs_bitmap_clear_bit(vol->lcnbmp_ino, lcn)) { + ntfs_error(vol->sb, "Failed to release " + "allocated cluster in error " + "code path. Run chkdsk to " + "recover the lost cluster."); + NVolSetErrors(vol); + } + up_write(&vol->lcnbmp_lock); + } + } + /* + * Resize the attribute record to its old size and rebuild the mapping + * pairs array. Note, we only can do this if the runlist has been + * restored to its old state which also implies that the mapped + * attribute extent is not switched. + */ + if (status.mp_rebuilt && !status.runlist_merged) { + if (ntfs_attr_record_resize(m, a, attr_rec_len)) { + ntfs_error(vol->sb, "Failed to restore attribute " + "record in error code path. Run " + "chkdsk to recover."); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } else /* if (success) */ { + if (ntfs_mapping_pairs_build(vol, (u8*)a + + le16_to_cpu(a->data.non_resident. + mapping_pairs_offset), attr_rec_len - + le16_to_cpu(a->data.non_resident. + mapping_pairs_offset), ni->runlist.rl, + vcn, highest_vcn, NULL)) { + ntfs_error(vol->sb, "Failed to restore " + "mapping pairs array in error " + "code path. Run chkdsk to " + "recover."); + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + } + } + /* Release the mft record and the attribute. */ + if (status.mft_attr_mapped) { + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + } + /* Release the runlist lock. */ + if (rl_write_locked) + up_write(&ni->runlist.lock); + else if (rl) + up_read(&ni->runlist.lock); + /* + * Zero out any newly allocated blocks to avoid exposing stale data. + * If BH_New is set, we know that the block was newly allocated above + * and that it has not been fully zeroed and marked dirty yet. + */ + nr_pages = u; + u = 0; + end = bh_cpos << vol->cluster_size_bits; + do { + page = pages[u]; + bh = head = page_buffers(page); + do { + if (u == nr_pages && + ((s64)page->index << PAGE_CACHE_SHIFT) + + bh_offset(bh) >= end) + break; + if (!buffer_new(bh)) + continue; + clear_buffer_new(bh); + if (!buffer_uptodate(bh)) { + if (PageUptodate(page)) + set_buffer_uptodate(bh); + else { + u8 *kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + bh_offset(bh), 0, + blocksize); + kunmap_atomic(kaddr, KM_USER0); + flush_dcache_page(page); + set_buffer_uptodate(bh); + } + } + mark_buffer_dirty(bh); + } while ((bh = bh->b_this_page) != head); + } while (++u <= nr_pages); + ntfs_error(vol->sb, "Failed. Returning error code %i.", err); + return err; +} + +/* + * Copy as much as we can into the pages and return the number of bytes which + * were sucessfully copied. If a fault is encountered then clear the pages + * out to (ofs + bytes) and return the number of bytes which were copied. + */ +static inline size_t ntfs_copy_from_user(struct page **pages, + unsigned nr_pages, unsigned ofs, const char __user *buf, + size_t bytes) +{ + struct page **last_page = pages + nr_pages; + char *kaddr; + size_t total = 0; + unsigned len; + int left; + + do { + len = PAGE_CACHE_SIZE - ofs; + if (len > bytes) + len = bytes; + kaddr = kmap_atomic(*pages, KM_USER0); + left = __copy_from_user_inatomic(kaddr + ofs, buf, len); + kunmap_atomic(kaddr, KM_USER0); + if (unlikely(left)) { + /* Do it the slow way. */ + kaddr = kmap(*pages); + left = __copy_from_user(kaddr + ofs, buf, len); + kunmap(*pages); + if (unlikely(left)) + goto err_out; + } + total += len; + bytes -= len; + if (!bytes) + break; + buf += len; + ofs = 0; + } while (++pages < last_page); +out: + return total; +err_out: + total += len - left; + /* Zero the rest of the target like __copy_from_user(). */ + while (++pages < last_page) { + bytes -= len; + if (!bytes) + break; + len = PAGE_CACHE_SIZE; + if (len > bytes) + len = bytes; + kaddr = kmap_atomic(*pages, KM_USER0); + memset(kaddr, 0, len); + kunmap_atomic(kaddr, KM_USER0); + } + goto out; +} + +static size_t __ntfs_copy_from_user_iovec(char *vaddr, + const struct iovec *iov, size_t iov_ofs, size_t bytes) +{ + size_t total = 0; + + while (1) { + const char __user *buf = iov->iov_base + iov_ofs; + unsigned len; + size_t left; + + len = iov->iov_len - iov_ofs; + if (len > bytes) + len = bytes; + left = __copy_from_user_inatomic(vaddr, buf, len); + total += len; + bytes -= len; + vaddr += len; + if (unlikely(left)) { + /* + * Zero the rest of the target like __copy_from_user(). + */ + memset(vaddr, 0, bytes); + total -= left; + break; + } + if (!bytes) + break; + iov++; + iov_ofs = 0; + } + return total; +} + +static inline void ntfs_set_next_iovec(const struct iovec **iovp, + size_t *iov_ofsp, size_t bytes) +{ + const struct iovec *iov = *iovp; + size_t iov_ofs = *iov_ofsp; + + while (bytes) { + unsigned len; + + len = iov->iov_len - iov_ofs; + if (len > bytes) + len = bytes; + bytes -= len; + iov_ofs += len; + if (iov->iov_len == iov_ofs) { + iov++; + iov_ofs = 0; + } + } + *iovp = iov; + *iov_ofsp = iov_ofs; +} + +/* + * This has the same side-effects and return value as ntfs_copy_from_user(). + * The difference is that on a fault we need to memset the remainder of the + * pages (out to offset + bytes), to emulate ntfs_copy_from_user()'s + * single-segment behaviour. + * + * We call the same helper (__ntfs_copy_from_user_iovec()) both when atomic and + * when not atomic. This is ok because __ntfs_copy_from_user_iovec() calls + * __copy_from_user_inatomic() and it is ok to call this when non-atomic. In + * fact, the only difference between __copy_from_user_inatomic() and + * __copy_from_user() is that the latter calls might_sleep(). And on many + * architectures __copy_from_user_inatomic() is just defined to + * __copy_from_user() so it makes no difference at all on those architectures. + */ +static inline size_t ntfs_copy_from_user_iovec(struct page **pages, + unsigned nr_pages, unsigned ofs, const struct iovec **iov, + size_t *iov_ofs, size_t bytes) +{ + struct page **last_page = pages + nr_pages; + char *kaddr; + size_t copied, len, total = 0; + + do { + len = PAGE_CACHE_SIZE - ofs; + if (len > bytes) + len = bytes; + kaddr = kmap_atomic(*pages, KM_USER0); + copied = __ntfs_copy_from_user_iovec(kaddr + ofs, + *iov, *iov_ofs, len); + kunmap_atomic(kaddr, KM_USER0); + if (unlikely(copied != len)) { + /* Do it the slow way. */ + kaddr = kmap(*pages); + copied = __ntfs_copy_from_user_iovec(kaddr + ofs, + *iov, *iov_ofs, len); + kunmap(*pages); + if (unlikely(copied != len)) + goto err_out; + } + total += len; + bytes -= len; + if (!bytes) + break; + ntfs_set_next_iovec(iov, iov_ofs, len); + ofs = 0; + } while (++pages < last_page); +out: + return total; +err_out: + total += copied; + /* Zero the rest of the target like __copy_from_user(). */ + while (++pages < last_page) { + bytes -= len; + if (!bytes) + break; + len = PAGE_CACHE_SIZE; + if (len > bytes) + len = bytes; + kaddr = kmap_atomic(*pages, KM_USER0); + memset(kaddr, 0, len); + kunmap_atomic(kaddr, KM_USER0); + } + goto out; +} + +static inline void ntfs_flush_dcache_pages(struct page **pages, + unsigned nr_pages) +{ + BUG_ON(!nr_pages); + do { + /* + * Warning: Do not do the decrement at the same time as the + * call because flush_dcache_page() is a NULL macro on i386 + * and hence the decrement never happens. + */ + flush_dcache_page(pages[nr_pages]); + } while (--nr_pages > 0); +} + +/** + * ntfs_commit_pages_after_non_resident_write - commit the received data + * @pages: array of destination pages + * @nr_pages: number of pages in @pages + * @pos: byte position in file at which the write begins + * @bytes: number of bytes to be written + * + * See description of ntfs_commit_pages_after_write(), below. + */ +static inline int ntfs_commit_pages_after_non_resident_write( + struct page **pages, const unsigned nr_pages, + s64 pos, size_t bytes) +{ + s64 end, initialized_size; + struct inode *vi; + ntfs_inode *ni, *base_ni; + struct buffer_head *bh, *head; + ntfs_attr_search_ctx *ctx; + MFT_RECORD *m; + ATTR_RECORD *a; + unsigned long flags; + unsigned blocksize, u; + int err; + + vi = pages[0]->mapping->host; + ni = NTFS_I(vi); + blocksize = 1 << vi->i_blkbits; + end = pos + bytes; + u = 0; + do { + s64 bh_pos; + struct page *page; + BOOL partial; + + page = pages[u]; + bh_pos = (s64)page->index << PAGE_CACHE_SHIFT; + bh = head = page_buffers(page); + partial = FALSE; + do { + s64 bh_end; + + bh_end = bh_pos + blocksize; + if (bh_end <= pos || bh_pos >= end) { + if (!buffer_uptodate(bh)) + partial = TRUE; + } else { + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + } + } while (bh_pos += blocksize, (bh = bh->b_this_page) != head); + /* + * If all buffers are now uptodate but the page is not, set the + * page uptodate. + */ + if (!partial && !PageUptodate(page)) + SetPageUptodate(page); + } while (++u < nr_pages); + /* + * Finally, if we do not need to update initialized_size or i_size we + * are finished. + */ + read_lock_irqsave(&ni->size_lock, flags); + initialized_size = ni->initialized_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (end <= initialized_size) { + ntfs_debug("Done."); + return 0; + } + /* + * Update initialized_size/i_size as appropriate, both in the inode and + * the mft record. + */ + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + /* Map, pin, and lock the mft record. */ + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + ctx = NULL; + goto err_out; + } + BUG_ON(!NInoNonResident(ni)); + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + a = ctx->attr; + BUG_ON(!a->non_resident); + write_lock_irqsave(&ni->size_lock, flags); + BUG_ON(end > ni->allocated_size); + ni->initialized_size = end; + a->data.non_resident.initialized_size = cpu_to_sle64(end); + if (end > i_size_read(vi)) { + i_size_write(vi, end); + a->data.non_resident.data_size = + a->data.non_resident.initialized_size; + } + write_unlock_irqrestore(&ni->size_lock, flags); + /* Mark the mft record dirty, so it gets written back. */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + ntfs_debug("Done."); + return 0; +err_out: + if (ctx) + ntfs_attr_put_search_ctx(ctx); + if (m) + unmap_mft_record(base_ni); + ntfs_error(vi->i_sb, "Failed to update initialized_size/i_size (error " + "code %i).", err); + if (err != -ENOMEM) { + NVolSetErrors(ni->vol); + make_bad_inode(VFS_I(base_ni)); + make_bad_inode(vi); + } + return err; +} + +/** + * ntfs_commit_pages_after_write - commit the received data + * @pages: array of destination pages + * @nr_pages: number of pages in @pages + * @pos: byte position in file at which the write begins + * @bytes: number of bytes to be written + * + * This is called from ntfs_file_buffered_write() with i_sem held on the inode + * (@pages[0]->mapping->host). There are @nr_pages pages in @pages which are + * locked but not kmap()ped. The source data has already been copied into the + * @page. ntfs_prepare_pages_for_non_resident_write() has been called before + * the data was copied (for non-resident attributes only) and it returned + * success. + * + * Need to set uptodate and mark dirty all buffers within the boundary of the + * write. If all buffers in a page are uptodate we set the page uptodate, too. + * + * Setting the buffers dirty ensures that they get written out later when + * ntfs_writepage() is invoked by the VM. + * + * Finally, we need to update i_size and initialized_size as appropriate both + * in the inode and the mft record. + * + * This is modelled after fs/buffer.c::generic_commit_write(), which marks + * buffers uptodate and dirty, sets the page uptodate if all buffers in the + * page are uptodate, and updates i_size if the end of io is beyond i_size. In + * that case, it also marks the inode dirty. + * + * If things have gone as outlined in + * ntfs_prepare_pages_for_non_resident_write(), we do not need to do any page + * content modifications here for non-resident attributes. For resident + * attributes we need to do the uptodate bringing here which we combine with + * the copying into the mft record which means we save one atomic kmap. + * + * Return 0 on success or -errno on error. + */ +static int ntfs_commit_pages_after_write(struct page **pages, + const unsigned nr_pages, s64 pos, size_t bytes) +{ + s64 end, initialized_size; + loff_t i_size; + struct inode *vi; + ntfs_inode *ni, *base_ni; + struct page *page; + ntfs_attr_search_ctx *ctx; + MFT_RECORD *m; + ATTR_RECORD *a; + char *kattr, *kaddr; + unsigned long flags; + u32 attr_len; + int err; + + BUG_ON(!nr_pages); + BUG_ON(!pages); + page = pages[0]; + BUG_ON(!page); + vi = page->mapping->host; + ni = NTFS_I(vi); + ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page " + "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.", + vi->i_ino, ni->type, page->index, nr_pages, + (long long)pos, bytes); + if (NInoNonResident(ni)) + return ntfs_commit_pages_after_non_resident_write(pages, + nr_pages, pos, bytes); + BUG_ON(nr_pages > 1); + /* + * Attribute is resident, implying it is not compressed, encrypted, or + * sparse. + */ + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + BUG_ON(NInoNonResident(ni)); + /* Map, pin, and lock the mft record. */ + m = map_mft_record(base_ni); + if (IS_ERR(m)) { + err = PTR_ERR(m); + m = NULL; + ctx = NULL; + goto err_out; + } + ctx = ntfs_attr_get_search_ctx(base_ni, m); + if (unlikely(!ctx)) { + err = -ENOMEM; + goto err_out; + } + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (unlikely(err)) { + if (err == -ENOENT) + err = -EIO; + goto err_out; + } + a = ctx->attr; + BUG_ON(a->non_resident); + /* The total length of the attribute value. */ + attr_len = le32_to_cpu(a->data.resident.value_length); + i_size = i_size_read(vi); + BUG_ON(attr_len != i_size); + BUG_ON(pos > attr_len); + end = pos + bytes; + BUG_ON(end > le32_to_cpu(a->length) - + le16_to_cpu(a->data.resident.value_offset)); + kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset); + kaddr = kmap_atomic(page, KM_USER0); + /* Copy the received data from the page to the mft record. */ + memcpy(kattr + pos, kaddr + pos, bytes); + /* Update the attribute length if necessary. */ + if (end > attr_len) { + attr_len = end; + a->data.resident.value_length = cpu_to_le32(attr_len); + } + /* + * If the page is not uptodate, bring the out of bounds area(s) + * uptodate by copying data from the mft record to the page. + */ + if (!PageUptodate(page)) { + if (pos > 0) + memcpy(kaddr, kattr, pos); + if (end < attr_len) + memcpy(kaddr + end, kattr + end, attr_len - end); + /* Zero the region outside the end of the attribute value. */ + memset(kaddr + attr_len, 0, PAGE_CACHE_SIZE - attr_len); + flush_dcache_page(page); + SetPageUptodate(page); + } + kunmap_atomic(kaddr, KM_USER0); + /* Update initialized_size/i_size if necessary. */ + read_lock_irqsave(&ni->size_lock, flags); + initialized_size = ni->initialized_size; + BUG_ON(end > ni->allocated_size); + read_unlock_irqrestore(&ni->size_lock, flags); + BUG_ON(initialized_size != i_size); + if (end > initialized_size) { + unsigned long flags; + + write_lock_irqsave(&ni->size_lock, flags); + ni->initialized_size = end; + i_size_write(vi, end); + write_unlock_irqrestore(&ni->size_lock, flags); + } + /* Mark the mft record dirty, so it gets written back. */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + ntfs_debug("Done."); + return 0; +err_out: + if (err == -ENOMEM) { + ntfs_warning(vi->i_sb, "Error allocating memory required to " + "commit the write."); + if (PageUptodate(page)) { + ntfs_warning(vi->i_sb, "Page is uptodate, setting " + "dirty so the write will be retried " + "later on by the VM."); + /* + * Put the page on mapping->dirty_pages, but leave its + * buffers' dirty state as-is. + */ + __set_page_dirty_nobuffers(page); + err = 0; + } else + ntfs_error(vi->i_sb, "Page is not uptodate. Written " + "data has been lost."); + } else { + ntfs_error(vi->i_sb, "Resident attribute commit write failed " + "with error %i.", err); + NVolSetErrors(ni->vol); + make_bad_inode(VFS_I(base_ni)); + make_bad_inode(vi); + } + if (ctx) + ntfs_attr_put_search_ctx(ctx); + if (m) + unmap_mft_record(base_ni); + return err; +} + +/** + * ntfs_file_buffered_write - + * + * Locking: The vfs is holding ->i_sem on the inode. + */ +static ssize_t ntfs_file_buffered_write(struct kiocb *iocb, + const struct iovec *iov, unsigned long nr_segs, + loff_t pos, loff_t *ppos, size_t count) +{ + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *vi = mapping->host; + ntfs_inode *ni = NTFS_I(vi); + ntfs_volume *vol = ni->vol; + struct page *pages[NTFS_MAX_PAGES_PER_CLUSTER]; + struct page *cached_page = NULL; + char __user *buf = NULL; + s64 end, ll; + VCN last_vcn; + LCN lcn; + unsigned long flags; + size_t bytes, iov_ofs = 0; /* Offset in the current iovec. */ + ssize_t status, written; + unsigned nr_pages; + int err; + struct pagevec lru_pvec; + + ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, " + "pos 0x%llx, count 0x%lx.", + vi->i_ino, (unsigned)le32_to_cpu(ni->type), + (unsigned long long)pos, (unsigned long)count); + if (unlikely(!count)) + return 0; + BUG_ON(NInoMstProtected(ni)); + /* + * If the attribute is not an index root and it is encrypted or + * compressed, we cannot write to it yet. Note we need to check for + * AT_INDEX_ALLOCATION since this is the type of both directory and + * index inodes. + */ + if (ni->type != AT_INDEX_ALLOCATION) { + /* If file is encrypted, deny access, just like NT4. */ + if (NInoEncrypted(ni)) { + /* + * Reminder for later: Encrypted files are _always_ + * non-resident so that the content can always be + * encrypted. + */ + ntfs_debug("Denying write access to encrypted file."); + return -EACCES; + } + if (NInoCompressed(ni)) { + /* Only unnamed $DATA attribute can be compressed. */ + BUG_ON(ni->type != AT_DATA); + BUG_ON(ni->name_len); + /* + * Reminder for later: If resident, the data is not + * actually compressed. Only on the switch to non- + * resident does compression kick in. This is in + * contrast to encrypted files (see above). + */ + ntfs_error(vi->i_sb, "Writing to compressed files is " + "not implemented yet. Sorry."); + return -EOPNOTSUPP; + } + } + /* + * If a previous ntfs_truncate() failed, repeat it and abort if it + * fails again. + */ + if (unlikely(NInoTruncateFailed(ni))) { + down_write(&vi->i_alloc_sem); + err = ntfs_truncate(vi); + up_write(&vi->i_alloc_sem); + if (err || NInoTruncateFailed(ni)) { + if (!err) + err = -EIO; + ntfs_error(vol->sb, "Cannot perform write to inode " + "0x%lx, attribute type 0x%x, because " + "ntfs_truncate() failed (error code " + "%i).", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + return err; + } + } + /* The first byte after the write. */ + end = pos + count; + /* + * If the write goes beyond the allocated size, extend the allocation + * to cover the whole of the write, rounded up to the nearest cluster. + */ + read_lock_irqsave(&ni->size_lock, flags); + ll = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (end > ll) { + /* Extend the allocation without changing the data size. */ + ll = ntfs_attr_extend_allocation(ni, end, -1, pos); + if (likely(ll >= 0)) { + BUG_ON(pos >= ll); + /* If the extension was partial truncate the write. */ + if (end > ll) { + ntfs_debug("Truncating write to inode 0x%lx, " + "attribute type 0x%x, because " + "the allocation was only " + "partially extended.", + vi->i_ino, (unsigned) + le32_to_cpu(ni->type)); + end = ll; + count = ll - pos; + } + } else { + err = ll; + read_lock_irqsave(&ni->size_lock, flags); + ll = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + /* Perform a partial write if possible or fail. */ + if (pos < ll) { + ntfs_debug("Truncating write to inode 0x%lx, " + "attribute type 0x%x, because " + "extending the allocation " + "failed (error code %i).", + vi->i_ino, (unsigned) + le32_to_cpu(ni->type), err); + end = ll; + count = ll - pos; + } else { + ntfs_error(vol->sb, "Cannot perform write to " + "inode 0x%lx, attribute type " + "0x%x, because extending the " + "allocation failed (error " + "code %i).", vi->i_ino, + (unsigned) + le32_to_cpu(ni->type), err); + return err; + } + } + } + pagevec_init(&lru_pvec, 0); + written = 0; + /* + * If the write starts beyond the initialized size, extend it up to the + * beginning of the write and initialize all non-sparse space between + * the old initialized size and the new one. This automatically also + * increments the vfs inode->i_size to keep it above or equal to the + * initialized_size. + */ + read_lock_irqsave(&ni->size_lock, flags); + ll = ni->initialized_size; + read_unlock_irqrestore(&ni->size_lock, flags); + if (pos > ll) { + err = ntfs_attr_extend_initialized(ni, pos, &cached_page, + &lru_pvec); + if (err < 0) { + ntfs_error(vol->sb, "Cannot perform write to inode " + "0x%lx, attribute type 0x%x, because " + "extending the initialized size " + "failed (error code %i).", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + status = err; + goto err_out; + } + } + /* + * Determine the number of pages per cluster for non-resident + * attributes. + */ + nr_pages = 1; + if (vol->cluster_size > PAGE_CACHE_SIZE && NInoNonResident(ni)) + nr_pages = vol->cluster_size >> PAGE_CACHE_SHIFT; + /* Finally, perform the actual write. */ + last_vcn = -1; + if (likely(nr_segs == 1)) + buf = iov->iov_base; + do { + VCN vcn; + pgoff_t idx, start_idx; + unsigned ofs, do_pages, u; + size_t copied; + + start_idx = idx = pos >> PAGE_CACHE_SHIFT; + ofs = pos & ~PAGE_CACHE_MASK; + bytes = PAGE_CACHE_SIZE - ofs; + do_pages = 1; + if (nr_pages > 1) { + vcn = pos >> vol->cluster_size_bits; + if (vcn != last_vcn) { + last_vcn = vcn; + /* + * Get the lcn of the vcn the write is in. If + * it is a hole, need to lock down all pages in + * the cluster. + */ + down_read(&ni->runlist.lock); + lcn = ntfs_attr_vcn_to_lcn_nolock(ni, pos >> + vol->cluster_size_bits, FALSE); + up_read(&ni->runlist.lock); + if (unlikely(lcn < LCN_HOLE)) { + status = -EIO; + if (lcn == LCN_ENOMEM) + status = -ENOMEM; + else + ntfs_error(vol->sb, "Cannot " + "perform write to " + "inode 0x%lx, " + "attribute type 0x%x, " + "because the attribute " + "is corrupt.", + vi->i_ino, (unsigned) + le32_to_cpu(ni->type)); + break; + } + if (lcn == LCN_HOLE) { + start_idx = (pos & ~(s64) + vol->cluster_size_mask) + >> PAGE_CACHE_SHIFT; + bytes = vol->cluster_size - (pos & + vol->cluster_size_mask); + do_pages = nr_pages; + } + } + } + if (bytes > count) + bytes = count; + /* + * Bring in the user page(s) that we will copy from _first_. + * Otherwise there is a nasty deadlock on copying from the same + * page(s) as we are writing to, without it/them being marked + * up-to-date. Note, at present there is nothing to stop the + * pages being swapped out between us bringing them into memory + * and doing the actual copying. + */ + if (likely(nr_segs == 1)) + ntfs_fault_in_pages_readable(buf, bytes); + else + ntfs_fault_in_pages_readable_iovec(iov, iov_ofs, bytes); + /* Get and lock @do_pages starting at index @start_idx. */ + status = __ntfs_grab_cache_pages(mapping, start_idx, do_pages, + pages, &cached_page, &lru_pvec); + if (unlikely(status)) + break; + /* + * For non-resident attributes, we need to fill any holes with + * actual clusters and ensure all bufferes are mapped. We also + * need to bring uptodate any buffers that are only partially + * being written to. + */ + if (NInoNonResident(ni)) { + status = ntfs_prepare_pages_for_non_resident_write( + pages, do_pages, pos, bytes); + if (unlikely(status)) { + loff_t i_size; + + do { + unlock_page(pages[--do_pages]); + page_cache_release(pages[do_pages]); + } while (do_pages); + /* + * The write preparation may have instantiated + * allocated space outside i_size. Trim this + * off again. We can ignore any errors in this + * case as we will just be waisting a bit of + * allocated space, which is not a disaster. + */ + i_size = i_size_read(vi); + if (pos + bytes > i_size) + vmtruncate(vi, i_size); + break; + } + } + u = (pos >> PAGE_CACHE_SHIFT) - pages[0]->index; + if (likely(nr_segs == 1)) { + copied = ntfs_copy_from_user(pages + u, do_pages - u, + ofs, buf, bytes); + buf += copied; + } else + copied = ntfs_copy_from_user_iovec(pages + u, + do_pages - u, ofs, &iov, &iov_ofs, + bytes); + ntfs_flush_dcache_pages(pages + u, do_pages - u); + status = ntfs_commit_pages_after_write(pages, do_pages, pos, + bytes); + if (likely(!status)) { + written += copied; + count -= copied; + pos += copied; + if (unlikely(copied != bytes)) + status = -EFAULT; + } + do { + unlock_page(pages[--do_pages]); + mark_page_accessed(pages[do_pages]); + page_cache_release(pages[do_pages]); + } while (do_pages); + if (unlikely(status)) + break; + balance_dirty_pages_ratelimited(mapping); + cond_resched(); + } while (count); +err_out: + *ppos = pos; + if (cached_page) + page_cache_release(cached_page); + /* For now, when the user asks for O_SYNC, we actually give O_DSYNC. */ + if (likely(!status)) { + if (unlikely((file->f_flags & O_SYNC) || IS_SYNC(vi))) { + if (!mapping->a_ops->writepage || !is_sync_kiocb(iocb)) + status = generic_osync_inode(vi, mapping, + OSYNC_METADATA|OSYNC_DATA); + } + } + pagevec_lru_add(&lru_pvec); + ntfs_debug("Done. Returning %s (written 0x%lx, status %li).", + written ? "written" : "status", (unsigned long)written, + (long)status); + return written ? written : status; +} + +/** + * ntfs_file_aio_write_nolock - + */ +static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb, + const struct iovec *iov, unsigned long nr_segs, loff_t *ppos) +{ + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + loff_t pos; + unsigned long seg; + size_t count; /* after file limit checks */ + ssize_t written, err; + + count = 0; + for (seg = 0; seg < nr_segs; seg++) { + const struct iovec *iv = &iov[seg]; + /* + * If any segment has a negative length, or the cumulative + * length ever wraps negative then return -EINVAL. + */ + count += iv->iov_len; + if (unlikely((ssize_t)(count|iv->iov_len) < 0)) + return -EINVAL; + if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len)) + continue; + if (!seg) + return -EFAULT; + nr_segs = seg; + count -= iv->iov_len; /* This segment is no good */ + break; + } + pos = *ppos; + vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); + /* We can write back this queue in page reclaim. */ + current->backing_dev_info = mapping->backing_dev_info; + written = 0; + err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); + if (err) + goto out; + if (!count) + goto out; + err = remove_suid(file->f_dentry); + if (err) + goto out; + inode_update_time(inode, 1); + written = ntfs_file_buffered_write(iocb, iov, nr_segs, pos, ppos, + count); +out: + current->backing_dev_info = NULL; + return written ? written : err; +} + +/** + * ntfs_file_aio_write - + */ +static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const char __user *buf, + size_t count, loff_t pos) +{ + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + ssize_t ret; + struct iovec local_iov = { .iov_base = (void __user *)buf, + .iov_len = count }; + + BUG_ON(iocb->ki_pos != pos); + + down(&inode->i_sem); + ret = ntfs_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos); + up(&inode->i_sem); + if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { + int err = sync_page_range(inode, mapping, pos, ret); + if (err < 0) + ret = err; + } + return ret; +} + +/** + * ntfs_file_writev - + * + * Basically the same as generic_file_writev() except that it ends up calling + * ntfs_file_aio_write_nolock() instead of __generic_file_aio_write_nolock(). + */ +static ssize_t ntfs_file_writev(struct file *file, const struct iovec *iov, + unsigned long nr_segs, loff_t *ppos) +{ + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + struct kiocb kiocb; + ssize_t ret; + + down(&inode->i_sem); + init_sync_kiocb(&kiocb, file); + ret = ntfs_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos); + if (ret == -EIOCBQUEUED) + ret = wait_on_sync_kiocb(&kiocb); + up(&inode->i_sem); + if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) { + int err = sync_page_range(inode, mapping, *ppos - ret, ret); + if (err < 0) + ret = err; + } + return ret; +} + +/** + * ntfs_file_write - simple wrapper for ntfs_file_writev() + */ +static ssize_t ntfs_file_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct iovec local_iov = { .iov_base = (void __user *)buf, + .iov_len = count }; + + return ntfs_file_writev(file, &local_iov, 1, ppos); +} + +/** * ntfs_file_fsync - sync a file to disk * @filp: file to be synced * @dentry: dentry describing the file to sync @@ -113,39 +2304,39 @@ static int ntfs_file_fsync(struct file *filp, struct dentry *dentry, #endif /* NTFS_RW */ struct file_operations ntfs_file_ops = { - .llseek = generic_file_llseek, /* Seek inside file. */ - .read = generic_file_read, /* Read from file. */ - .aio_read = generic_file_aio_read, /* Async read from file. */ - .readv = generic_file_readv, /* Read from file. */ + .llseek = generic_file_llseek, /* Seek inside file. */ + .read = generic_file_read, /* Read from file. */ + .aio_read = generic_file_aio_read, /* Async read from file. */ + .readv = generic_file_readv, /* Read from file. */ #ifdef NTFS_RW - .write = generic_file_write, /* Write to file. */ - .aio_write = generic_file_aio_write, /* Async write to file. */ - .writev = generic_file_writev, /* Write to file. */ - /*.release = ,*/ /* Last file is closed. See - fs/ext2/file.c:: - ext2_release_file() for - how to use this to discard - preallocated space for - write opened files. */ - .fsync = ntfs_file_fsync, /* Sync a file to disk. */ - /*.aio_fsync = ,*/ /* Sync all outstanding async - i/o operations on a - kiocb. */ + .write = ntfs_file_write, /* Write to file. */ + .aio_write = ntfs_file_aio_write, /* Async write to file. */ + .writev = ntfs_file_writev, /* Write to file. */ + /*.release = ,*/ /* Last file is closed. See + fs/ext2/file.c:: + ext2_release_file() for + how to use this to discard + preallocated space for + write opened files. */ + .fsync = ntfs_file_fsync, /* Sync a file to disk. */ + /*.aio_fsync = ,*/ /* Sync all outstanding async + i/o operations on a + kiocb. */ #endif /* NTFS_RW */ - /*.ioctl = ,*/ /* Perform function on the - mounted filesystem. */ - .mmap = generic_file_mmap, /* Mmap file. */ - .open = ntfs_file_open, /* Open file. */ - .sendfile = generic_file_sendfile, /* Zero-copy data send with - the data source being on - the ntfs partition. We - do not need to care about - the data destination. */ - /*.sendpage = ,*/ /* Zero-copy data send with - the data destination being - on the ntfs partition. We - do not need to care about - the data source. */ + /*.ioctl = ,*/ /* Perform function on the + mounted filesystem. */ + .mmap = generic_file_mmap, /* Mmap file. */ + .open = ntfs_file_open, /* Open file. */ + .sendfile = generic_file_sendfile, /* Zero-copy data send with + the data source being on + the ntfs partition. We do + not need to care about the + data destination. */ + /*.sendpage = ,*/ /* Zero-copy data send with + the data destination being + on the ntfs partition. We + do not need to care about + the data source. */ }; struct inode_operations ntfs_file_inode_ops = { diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c index 7ec04513180..b24f4c4b2c5 100644 --- a/fs/ntfs/inode.c +++ b/fs/ntfs/inode.c @@ -30,6 +30,7 @@ #include "debug.h" #include "inode.h" #include "attrib.h" +#include "lcnalloc.h" #include "malloc.h" #include "mft.h" #include "time.h" @@ -2291,11 +2292,16 @@ int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt) #ifdef NTFS_RW +static const char *es = " Leaving inconsistent metadata. Unmount and run " + "chkdsk."; + /** * ntfs_truncate - called when the i_size of an ntfs inode is changed * @vi: inode for which the i_size was changed * - * We do not support i_size changes yet. + * We only support i_size changes for normal files at present, i.e. not + * compressed and not encrypted. This is enforced in ntfs_setattr(), see + * below. * * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and * that the change is allowed. @@ -2306,80 +2312,499 @@ int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt) * Returns 0 on success or -errno on error. * * Called with ->i_sem held. In all but one case ->i_alloc_sem is held for - * writing. The only case where ->i_alloc_sem is not held is + * writing. The only case in the kernel where ->i_alloc_sem is not held is * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called - * with the current i_size as the offset which means that it is a noop as far - * as ntfs_truncate() is concerned. + * with the current i_size as the offset. The analogous place in NTFS is in + * fs/ntfs/file.c::ntfs_file_buffered_write() where we call vmtruncate() again + * without holding ->i_alloc_sem. */ int ntfs_truncate(struct inode *vi) { - ntfs_inode *ni = NTFS_I(vi); + s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size; + VCN highest_vcn; + unsigned long flags; + ntfs_inode *base_ni, *ni = NTFS_I(vi); ntfs_volume *vol = ni->vol; ntfs_attr_search_ctx *ctx; MFT_RECORD *m; ATTR_RECORD *a; const char *te = " Leaving file length out of sync with i_size."; - int err; + int err, mp_size, size_change, alloc_change; + u32 attr_len; ntfs_debug("Entering for inode 0x%lx.", vi->i_ino); BUG_ON(NInoAttr(ni)); + BUG_ON(S_ISDIR(vi->i_mode)); + BUG_ON(NInoMstProtected(ni)); BUG_ON(ni->nr_extents < 0); - m = map_mft_record(ni); +retry_truncate: + /* + * Lock the runlist for writing and map the mft record to ensure it is + * safe to mess with the attribute runlist and sizes. + */ + down_write(&ni->runlist.lock); + if (!NInoAttr(ni)) + base_ni = ni; + else + base_ni = ni->ext.base_ntfs_ino; + m = map_mft_record(base_ni); if (IS_ERR(m)) { err = PTR_ERR(m); ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx " "(error code %d).%s", vi->i_ino, err, te); ctx = NULL; m = NULL; - goto err_out; + goto old_bad_out; } - ctx = ntfs_attr_get_search_ctx(ni, m); + ctx = ntfs_attr_get_search_ctx(base_ni, m); if (unlikely(!ctx)) { ntfs_error(vi->i_sb, "Failed to allocate a search context for " "inode 0x%lx (not enough memory).%s", vi->i_ino, te); err = -ENOMEM; - goto err_out; + goto old_bad_out; } err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx); if (unlikely(err)) { - if (err == -ENOENT) + if (err == -ENOENT) { ntfs_error(vi->i_sb, "Open attribute is missing from " "mft record. Inode 0x%lx is corrupt. " - "Run chkdsk.", vi->i_ino); - else + "Run chkdsk.%s", vi->i_ino, te); + err = -EIO; + } else ntfs_error(vi->i_sb, "Failed to lookup attribute in " - "inode 0x%lx (error code %d).", - vi->i_ino, err); - goto err_out; + "inode 0x%lx (error code %d).%s", + vi->i_ino, err, te); + goto old_bad_out; } + m = ctx->mrec; a = ctx->attr; - /* If the size has not changed there is nothing to do. */ - if (ntfs_attr_size(a) == i_size_read(vi)) - goto done; - // TODO: Implement the truncate... - ntfs_error(vi->i_sb, "Inode size has changed but this is not " - "implemented yet. Resetting inode size to old value. " - " This is most likely a bug in the ntfs driver!"); - i_size_write(vi, ntfs_attr_size(a)); -done: + /* + * The i_size of the vfs inode is the new size for the attribute value. + */ + new_size = i_size_read(vi); + /* The current size of the attribute value is the old size. */ + old_size = ntfs_attr_size(a); + /* Calculate the new allocated size. */ + if (NInoNonResident(ni)) + new_alloc_size = (new_size + vol->cluster_size - 1) & + ~(s64)vol->cluster_size_mask; + else + new_alloc_size = (new_size + 7) & ~7; + /* The current allocated size is the old allocated size. */ + read_lock_irqsave(&ni->size_lock, flags); + old_alloc_size = ni->allocated_size; + read_unlock_irqrestore(&ni->size_lock, flags); + /* + * The change in the file size. This will be 0 if no change, >0 if the + * size is growing, and <0 if the size is shrinking. + */ + size_change = -1; + if (new_size - old_size >= 0) { + size_change = 1; + if (new_size == old_size) + size_change = 0; + } + /* As above for the allocated size. */ + alloc_change = -1; + if (new_alloc_size - old_alloc_size >= 0) { + alloc_change = 1; + if (new_alloc_size == old_alloc_size) + alloc_change = 0; + } + /* + * If neither the size nor the allocation are being changed there is + * nothing to do. + */ + if (!size_change && !alloc_change) + goto unm_done; + /* If the size is changing, check if new size is allowed in $AttrDef. */ + if (size_change) { + err = ntfs_attr_size_bounds_check(vol, ni->type, new_size); + if (unlikely(err)) { + if (err == -ERANGE) { + ntfs_error(vol->sb, "Truncate would cause the " + "inode 0x%lx to %simum size " + "for its attribute type " + "(0x%x). Aborting truncate.", + vi->i_ino, + new_size > old_size ? "exceed " + "the max" : "go under the min", + le32_to_cpu(ni->type)); + err = -EFBIG; + } else { + ntfs_error(vol->sb, "Inode 0x%lx has unknown " + "attribute type 0x%x. " + "Aborting truncate.", + vi->i_ino, + le32_to_cpu(ni->type)); + err = -EIO; + } + /* Reset the vfs inode size to the old size. */ + i_size_write(vi, old_size); + goto err_out; + } + } + if (NInoCompressed(ni) || NInoEncrypted(ni)) { + ntfs_warning(vi->i_sb, "Changes in inode size are not " + "supported yet for %s files, ignoring.", + NInoCompressed(ni) ? "compressed" : + "encrypted"); + err = -EOPNOTSUPP; + goto bad_out; + } + if (a->non_resident) + goto do_non_resident_truncate; + BUG_ON(NInoNonResident(ni)); + /* Resize the attribute record to best fit the new attribute size. */ + if (new_size < vol->mft_record_size && + !ntfs_resident_attr_value_resize(m, a, new_size)) { + unsigned long flags; + + /* The resize succeeded! */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + write_lock_irqsave(&ni->size_lock, flags); + /* Update the sizes in the ntfs inode and all is done. */ + ni->allocated_size = le32_to_cpu(a->length) - + le16_to_cpu(a->data.resident.value_offset); + /* + * Note ntfs_resident_attr_value_resize() has already done any + * necessary data clearing in the attribute record. When the + * file is being shrunk vmtruncate() will already have cleared + * the top part of the last partial page, i.e. since this is + * the resident case this is the page with index 0. However, + * when the file is being expanded, the page cache page data + * between the old data_size, i.e. old_size, and the new_size + * has not been zeroed. Fortunately, we do not need to zero it + * either since on one hand it will either already be zero due + * to both readpage and writepage clearing partial page data + * beyond i_size in which case there is nothing to do or in the + * case of the file being mmap()ped at the same time, POSIX + * specifies that the behaviour is unspecified thus we do not + * have to do anything. This means that in our implementation + * in the rare case that the file is mmap()ped and a write + * occured into the mmap()ped region just beyond the file size + * and writepage has not yet been called to write out the page + * (which would clear the area beyond the file size) and we now + * extend the file size to incorporate this dirty region + * outside the file size, a write of the page would result in + * this data being written to disk instead of being cleared. + * Given both POSIX and the Linux mmap(2) man page specify that + * this corner case is undefined, we choose to leave it like + * that as this is much simpler for us as we cannot lock the + * relevant page now since we are holding too many ntfs locks + * which would result in a lock reversal deadlock. + */ + ni->initialized_size = new_size; + write_unlock_irqrestore(&ni->size_lock, flags); + goto unm_done; + } + /* If the above resize failed, this must be an attribute extension. */ + BUG_ON(size_change < 0); + /* + * We have to drop all the locks so we can call + * ntfs_attr_make_non_resident(). This could be optimised by try- + * locking the first page cache page and only if that fails dropping + * the locks, locking the page, and redoing all the locking and + * lookups. While this would be a huge optimisation, it is not worth + * it as this is definitely a slow code path as it only ever can happen + * once for any given file. + */ ntfs_attr_put_search_ctx(ctx); - unmap_mft_record(ni); - NInoClearTruncateFailed(ni); - ntfs_debug("Done."); - return 0; -err_out: - if (err != -ENOMEM) { + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); + /* + * Not enough space in the mft record, try to make the attribute + * non-resident and if successful restart the truncation process. + */ + err = ntfs_attr_make_non_resident(ni, old_size); + if (likely(!err)) + goto retry_truncate; + /* + * Could not make non-resident. If this is due to this not being + * permitted for this attribute type or there not being enough space, + * try to make other attributes non-resident. Otherwise fail. + */ + if (unlikely(err != -EPERM && err != -ENOSPC)) { + ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute " + "type 0x%x, because the conversion from " + "resident to non-resident attribute failed " + "with error code %i.", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), err); + if (err != -ENOMEM) + err = -EIO; + goto conv_err_out; + } + /* TODO: Not implemented from here, abort. */ + if (err == -ENOSPC) + ntfs_error(vol->sb, "Not enough space in the mft record/on " + "disk for the non-resident attribute value. " + "This case is not implemented yet."); + else /* if (err == -EPERM) */ + ntfs_error(vol->sb, "This attribute type may not be " + "non-resident. This case is not implemented " + "yet."); + err = -EOPNOTSUPP; + goto conv_err_out; +#if 0 + // TODO: Attempt to make other attributes non-resident. + if (!err) + goto do_resident_extend; + /* + * Both the attribute list attribute and the standard information + * attribute must remain in the base inode. Thus, if this is one of + * these attributes, we have to try to move other attributes out into + * extent mft records instead. + */ + if (ni->type == AT_ATTRIBUTE_LIST || + ni->type == AT_STANDARD_INFORMATION) { + // TODO: Attempt to move other attributes into extent mft + // records. + err = -EOPNOTSUPP; + if (!err) + goto do_resident_extend; + goto err_out; + } + // TODO: Attempt to move this attribute to an extent mft record, but + // only if it is not already the only attribute in an mft record in + // which case there would be nothing to gain. + err = -EOPNOTSUPP; + if (!err) + goto do_resident_extend; + /* There is nothing we can do to make enough space. )-: */ + goto err_out; +#endif +do_non_resident_truncate: + BUG_ON(!NInoNonResident(ni)); + if (alloc_change < 0) { + highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn); + if (highest_vcn > 0 && + old_alloc_size >> vol->cluster_size_bits > + highest_vcn + 1) { + /* + * This attribute has multiple extents. Not yet + * supported. + */ + ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, " + "attribute type 0x%x, because the " + "attribute is highly fragmented (it " + "consists of multiple extents) and " + "this case is not implemented yet.", + vi->i_ino, + (unsigned)le32_to_cpu(ni->type)); + err = -EOPNOTSUPP; + goto bad_out; + } + } + /* + * If the size is shrinking, need to reduce the initialized_size and + * the data_size before reducing the allocation. + */ + if (size_change < 0) { + /* + * Make the valid size smaller (i_size is already up-to-date). + */ + write_lock_irqsave(&ni->size_lock, flags); + if (new_size < ni->initialized_size) { + ni->initialized_size = new_size; + a->data.non_resident.initialized_size = + cpu_to_sle64(new_size); + } + a->data.non_resident.data_size = cpu_to_sle64(new_size); + write_unlock_irqrestore(&ni->size_lock, flags); + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); + /* If the allocated size is not changing, we are done. */ + if (!alloc_change) + goto unm_done; + /* + * If the size is shrinking it makes no sense for the + * allocation to be growing. + */ + BUG_ON(alloc_change > 0); + } else /* if (size_change >= 0) */ { + /* + * The file size is growing or staying the same but the + * allocation can be shrinking, growing or staying the same. + */ + if (alloc_change > 0) { + /* + * We need to extend the allocation and possibly update + * the data size. If we are updating the data size, + * since we are not touching the initialized_size we do + * not need to worry about the actual data on disk. + * And as far as the page cache is concerned, there + * will be no pages beyond the old data size and any + * partial region in the last page between the old and + * new data size (or the end of the page if the new + * data size is outside the page) does not need to be + * modified as explained above for the resident + * attribute truncate case. To do this, we simply drop + * the locks we hold and leave all the work to our + * friendly helper ntfs_attr_extend_allocation(). + */ + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); + err = ntfs_attr_extend_allocation(ni, new_size, + size_change > 0 ? new_size : -1, -1); + /* + * ntfs_attr_extend_allocation() will have done error + * output already. + */ + goto done; + } + if (!alloc_change) + goto alloc_done; + } + /* alloc_change < 0 */ + /* Free the clusters. */ + nr_freed = ntfs_cluster_free(ni, new_alloc_size >> + vol->cluster_size_bits, -1, ctx); + m = ctx->mrec; + a = ctx->attr; + if (unlikely(nr_freed < 0)) { + ntfs_error(vol->sb, "Failed to release cluster(s) (error code " + "%lli). Unmount and run chkdsk to recover " + "the lost cluster(s).", (long long)nr_freed); NVolSetErrors(vol); + nr_freed = 0; + } + /* Truncate the runlist. */ + err = ntfs_rl_truncate_nolock(vol, &ni->runlist, + new_alloc_size >> vol->cluster_size_bits); + /* + * If the runlist truncation failed and/or the search context is no + * longer valid, we cannot resize the attribute record or build the + * mapping pairs array thus we mark the inode bad so that no access to + * the freed clusters can happen. + */ + if (unlikely(err || IS_ERR(m))) { + ntfs_error(vol->sb, "Failed to %s (error code %li).%s", + IS_ERR(m) ? + "restore attribute search context" : + "truncate attribute runlist", + IS_ERR(m) ? PTR_ERR(m) : err, es); + err = -EIO; + goto bad_out; + } + /* Get the size for the shrunk mapping pairs array for the runlist. */ + mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1); + if (unlikely(mp_size <= 0)) { + ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, " + "attribute type 0x%x, because determining the " + "size for the mapping pairs failed with error " + "code %i.%s", vi->i_ino, + (unsigned)le32_to_cpu(ni->type), mp_size, es); + err = -EIO; + goto bad_out; + } + /* + * Shrink the attribute record for the new mapping pairs array. Note, + * this cannot fail since we are making the attribute smaller thus by + * definition there is enough space to do so. + */ + attr_len = le32_to_cpu(a->length); + err = ntfs_attr_record_resize(m, a, mp_size + + le16_to_cpu(a->data.non_resident.mapping_pairs_offset)); + BUG_ON(err); + /* + * Generate the mapping pairs array directly into the attribute record. + */ + err = ntfs_mapping_pairs_build(vol, (u8*)a + + le16_to_cpu(a->data.non_resident.mapping_pairs_offset), + mp_size, ni->runlist.rl, 0, -1, NULL); + if (unlikely(err)) { + ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, " + "attribute type 0x%x, because building the " + "mapping pairs failed with error code %i.%s", + vi->i_ino, (unsigned)le32_to_cpu(ni->type), + err, es); + err = -EIO; + goto bad_out; + } + /* Update the allocated/compressed size as well as the highest vcn. */ + a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >> + vol->cluster_size_bits) - 1); + write_lock_irqsave(&ni->size_lock, flags); + ni->allocated_size = new_alloc_size; + a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size); + if (NInoSparse(ni) || NInoCompressed(ni)) { + if (nr_freed) { + ni->itype.compressed.size -= nr_freed << + vol->cluster_size_bits; + BUG_ON(ni->itype.compressed.size < 0); + a->data.non_resident.compressed_size = cpu_to_sle64( + ni->itype.compressed.size); + vi->i_blocks = ni->itype.compressed.size >> 9; + } + } else + vi->i_blocks = new_alloc_size >> 9; + write_unlock_irqrestore(&ni->size_lock, flags); + /* + * We have shrunk the allocation. If this is a shrinking truncate we + * have already dealt with the initialized_size and the data_size above + * and we are done. If the truncate is only changing the allocation + * and not the data_size, we are also done. If this is an extending + * truncate, need to extend the data_size now which is ensured by the + * fact that @size_change is positive. + */ +alloc_done: + /* + * If the size is growing, need to update it now. If it is shrinking, + * we have already updated it above (before the allocation change). + */ + if (size_change > 0) + a->data.non_resident.data_size = cpu_to_sle64(new_size); + /* Ensure the modified mft record is written out. */ + flush_dcache_mft_record_page(ctx->ntfs_ino); + mark_mft_record_dirty(ctx->ntfs_ino); +unm_done: + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); +done: + /* Update the mtime and ctime on the base inode. */ + inode_update_time(VFS_I(base_ni), 1); + if (likely(!err)) { + NInoClearTruncateFailed(ni); + ntfs_debug("Done."); + } + return err; +old_bad_out: + old_size = -1; +bad_out: + if (err != -ENOMEM && err != -EOPNOTSUPP) { make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); } + if (err != -EOPNOTSUPP) + NInoSetTruncateFailed(ni); + else if (old_size >= 0) + i_size_write(vi, old_size); +err_out: if (ctx) ntfs_attr_put_search_ctx(ctx); if (m) - unmap_mft_record(ni); - NInoSetTruncateFailed(ni); + unmap_mft_record(base_ni); + up_write(&ni->runlist.lock); +out: + ntfs_debug("Failed. Returning error code %i.", err); return err; +conv_err_out: + if (err != -ENOMEM && err != -EOPNOTSUPP) { + make_bad_inode(vi); + make_bad_inode(VFS_I(base_ni)); + NVolSetErrors(vol); + } + if (err != -EOPNOTSUPP) + NInoSetTruncateFailed(ni); + else + i_size_write(vi, old_size); + goto out; } /** @@ -2420,8 +2845,7 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr) err = inode_change_ok(vi, attr); if (err) - return err; - + goto out; /* We do not support NTFS ACLs yet. */ if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) { ntfs_warning(vi->i_sb, "Changes in user/group/mode are not " @@ -2429,14 +2853,22 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr) err = -EOPNOTSUPP; goto out; } - if (ia_valid & ATTR_SIZE) { if (attr->ia_size != i_size_read(vi)) { - ntfs_warning(vi->i_sb, "Changes in inode size are not " - "supported yet, ignoring."); - err = -EOPNOTSUPP; - // TODO: Implement... - // err = vmtruncate(vi, attr->ia_size); + ntfs_inode *ni = NTFS_I(vi); + /* + * FIXME: For now we do not support resizing of + * compressed or encrypted files yet. + */ + if (NInoCompressed(ni) || NInoEncrypted(ni)) { + ntfs_warning(vi->i_sb, "Changes in inode size " + "are not supported yet for " + "%s files, ignoring.", + NInoCompressed(ni) ? + "compressed" : "encrypted"); + err = -EOPNOTSUPP; + } else + err = vmtruncate(vi, attr->ia_size); if (err || ia_valid == ATTR_SIZE) goto out; } else { diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h index 5c248d404f0..f5678d5d791 100644 --- a/fs/ntfs/layout.h +++ b/fs/ntfs/layout.h @@ -1021,10 +1021,17 @@ enum { FILE_NAME_POSIX = 0x00, /* This is the largest namespace. It is case sensitive and allows all Unicode characters except for: '\0' and '/'. Beware that in - WinNT/2k files which eg have the same name except for their case - will not be distinguished by the standard utilities and thus a "del - filename" will delete both "filename" and "fileName" without - warning. */ + WinNT/2k/2003 by default files which eg have the same name except + for their case will not be distinguished by the standard utilities + and thus a "del filename" will delete both "filename" and "fileName" + without warning. However if for example Services For Unix (SFU) are + installed and the case sensitive option was enabled at installation + time, then you can create/access/delete such files. + Note that even SFU places restrictions on the filenames beyond the + '\0' and '/' and in particular the following set of characters is + not allowed: '"', '/', '<', '>', '\'. All other characters, + including the ones no allowed in WIN32 namespace are allowed. + Tested with SFU 3.5 (this is now free) running on Windows XP. */ FILE_NAME_WIN32 = 0x01, /* The standard WinNT/2k NTFS long filenames. Case insensitive. All Unicode chars except: '\0', '"', '*', '/', ':', '<', '>', '?', '\', @@ -2367,7 +2374,9 @@ typedef struct { * Extended attribute flags (8-bit). */ enum { - NEED_EA = 0x80 + NEED_EA = 0x80 /* If set the file to which the EA belongs + cannot be interpreted without understanding + the associates extended attributes. */ } __attribute__ ((__packed__)); typedef u8 EA_FLAGS; @@ -2375,20 +2384,20 @@ typedef u8 EA_FLAGS; /* * Attribute: Extended attribute (EA) (0xe0). * - * NOTE: Always non-resident. (Is this true?) + * NOTE: Can be resident or non-resident. * * Like the attribute list and the index buffer list, the EA attribute value is * a sequence of EA_ATTR variable length records. - * - * FIXME: It appears weird that the EA name is not unicode. Is it true? */ typedef struct { le32 next_entry_offset; /* Offset to the next EA_ATTR. */ EA_FLAGS flags; /* Flags describing the EA. */ - u8 ea_name_length; /* Length of the name of the EA in bytes. */ + u8 ea_name_length; /* Length of the name of the EA in bytes + excluding the '\0' byte terminator. */ le16 ea_value_length; /* Byte size of the EA's value. */ - u8 ea_name[0]; /* Name of the EA. */ - u8 ea_value[0]; /* The value of the EA. Immediately follows + u8 ea_name[0]; /* Name of the EA. Note this is ASCII, not + Unicode and it is zero terminated. */ + u8 ea_value[0]; /* The value of the EA. Immediately follows the name. */ } __attribute__ ((__packed__)) EA_ATTR; diff --git a/fs/ntfs/lcnalloc.c b/fs/ntfs/lcnalloc.c index 5af3bf0b7ee..29cabf93d2d 100644 --- a/fs/ntfs/lcnalloc.c +++ b/fs/ntfs/lcnalloc.c @@ -76,6 +76,7 @@ int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol, * @count: number of clusters to allocate * @start_lcn: starting lcn at which to allocate the clusters (or -1 if none) * @zone: zone from which to allocate the clusters + * @is_extension: if TRUE, this is an attribute extension * * Allocate @count clusters preferably starting at cluster @start_lcn or at the * current allocator position if @start_lcn is -1, on the mounted ntfs volume @@ -86,6 +87,13 @@ int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol, * @start_vcn specifies the vcn of the first allocated cluster. This makes * merging the resulting runlist with the old runlist easier. * + * If @is_extension is TRUE, the caller is allocating clusters to extend an + * attribute and if it is FALSE, the caller is allocating clusters to fill a + * hole in an attribute. Practically the difference is that if @is_extension + * is TRUE the returned runlist will be terminated with LCN_ENOENT and if + * @is_extension is FALSE the runlist will be terminated with + * LCN_RL_NOT_MAPPED. + * * You need to check the return value with IS_ERR(). If this is false, the * function was successful and the return value is a runlist describing the * allocated cluster(s). If IS_ERR() is true, the function failed and @@ -137,7 +145,8 @@ int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol, */ runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn, const s64 count, const LCN start_lcn, - const NTFS_CLUSTER_ALLOCATION_ZONES zone) + const NTFS_CLUSTER_ALLOCATION_ZONES zone, + const BOOL is_extension) { LCN zone_start, zone_end, bmp_pos, bmp_initial_pos, last_read_pos, lcn; LCN prev_lcn = 0, prev_run_len = 0, mft_zone_size; @@ -310,7 +319,7 @@ runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn, continue; } bit = 1 << (lcn & 7); - ntfs_debug("bit %i.", bit); + ntfs_debug("bit 0x%x.", bit); /* If the bit is already set, go onto the next one. */ if (*byte & bit) { lcn++; @@ -729,7 +738,7 @@ out: /* Add runlist terminator element. */ if (likely(rl)) { rl[rlpos].vcn = rl[rlpos - 1].vcn + rl[rlpos - 1].length; - rl[rlpos].lcn = LCN_RL_NOT_MAPPED; + rl[rlpos].lcn = is_extension ? LCN_ENOENT : LCN_RL_NOT_MAPPED; rl[rlpos].length = 0; } if (likely(page && !IS_ERR(page))) { @@ -782,6 +791,7 @@ out: * @ni: ntfs inode whose runlist describes the clusters to free * @start_vcn: vcn in the runlist of @ni at which to start freeing clusters * @count: number of clusters to free or -1 for all clusters + * @ctx: active attribute search context if present or NULL if not * @is_rollback: true if this is a rollback operation * * Free @count clusters starting at the cluster @start_vcn in the runlist @@ -791,15 +801,39 @@ out: * deallocated. Thus, to completely free all clusters in a runlist, use * @start_vcn = 0 and @count = -1. * + * If @ctx is specified, it is an active search context of @ni and its base mft + * record. This is needed when __ntfs_cluster_free() encounters unmapped + * runlist fragments and allows their mapping. If you do not have the mft + * record mapped, you can specify @ctx as NULL and __ntfs_cluster_free() will + * perform the necessary mapping and unmapping. + * + * Note, __ntfs_cluster_free() saves the state of @ctx on entry and restores it + * before returning. Thus, @ctx will be left pointing to the same attribute on + * return as on entry. However, the actual pointers in @ctx may point to + * different memory locations on return, so you must remember to reset any + * cached pointers from the @ctx, i.e. after the call to __ntfs_cluster_free(), + * you will probably want to do: + * m = ctx->mrec; + * a = ctx->attr; + * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that + * you cache ctx->mrec in a variable @m of type MFT_RECORD *. + * * @is_rollback should always be FALSE, it is for internal use to rollback * errors. You probably want to use ntfs_cluster_free() instead. * - * Note, ntfs_cluster_free() does not modify the runlist at all, so the caller - * has to deal with it later. + * Note, __ntfs_cluster_free() does not modify the runlist, so you have to + * remove from the runlist or mark sparse the freed runs later. * * Return the number of deallocated clusters (not counting sparse ones) on * success and -errno on error. * + * WARNING: If @ctx is supplied, regardless of whether success or failure is + * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx + * is no longer valid, i.e. you need to either call + * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it. + * In that case PTR_ERR(@ctx->mrec) will give you the error code for + * why the mapping of the old inode failed. + * * Locking: - The runlist described by @ni must be locked for writing on entry * and is locked on return. Note the runlist may be modified when * needed runlist fragments need to be mapped. @@ -807,9 +841,13 @@ out: * on return. * - This function takes the volume lcn bitmap lock for writing and * modifies the bitmap contents. + * - If @ctx is NULL, the base mft record of @ni must not be mapped on + * entry and it will be left unmapped on return. + * - If @ctx is not NULL, the base mft record must be mapped on entry + * and it will be left mapped on return. */ s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, s64 count, - const BOOL is_rollback) + ntfs_attr_search_ctx *ctx, const BOOL is_rollback) { s64 delta, to_free, total_freed, real_freed; ntfs_volume *vol; @@ -839,7 +877,7 @@ s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, s64 count, total_freed = real_freed = 0; - rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, TRUE); + rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, ctx); if (IS_ERR(rl)) { if (!is_rollback) ntfs_error(vol->sb, "Failed to find first runlist " @@ -893,7 +931,7 @@ s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, s64 count, /* Attempt to map runlist. */ vcn = rl->vcn; - rl = ntfs_attr_find_vcn_nolock(ni, vcn, TRUE); + rl = ntfs_attr_find_vcn_nolock(ni, vcn, ctx); if (IS_ERR(rl)) { err = PTR_ERR(rl); if (!is_rollback) @@ -961,7 +999,7 @@ err_out: * If rollback fails, set the volume errors flag, emit an error * message, and return the error code. */ - delta = __ntfs_cluster_free(ni, start_vcn, total_freed, TRUE); + delta = __ntfs_cluster_free(ni, start_vcn, total_freed, ctx, TRUE); if (delta < 0) { ntfs_error(vol->sb, "Failed to rollback (error %i). Leaving " "inconsistent metadata! Unmount and run " diff --git a/fs/ntfs/lcnalloc.h b/fs/ntfs/lcnalloc.h index a6a8827882e..72cbca7003b 100644 --- a/fs/ntfs/lcnalloc.h +++ b/fs/ntfs/lcnalloc.h @@ -27,6 +27,7 @@ #include <linux/fs.h> +#include "attrib.h" #include "types.h" #include "inode.h" #include "runlist.h" @@ -41,16 +42,18 @@ typedef enum { extern runlist_element *ntfs_cluster_alloc(ntfs_volume *vol, const VCN start_vcn, const s64 count, const LCN start_lcn, - const NTFS_CLUSTER_ALLOCATION_ZONES zone); + const NTFS_CLUSTER_ALLOCATION_ZONES zone, + const BOOL is_extension); extern s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, - s64 count, const BOOL is_rollback); + s64 count, ntfs_attr_search_ctx *ctx, const BOOL is_rollback); /** * ntfs_cluster_free - free clusters on an ntfs volume * @ni: ntfs inode whose runlist describes the clusters to free * @start_vcn: vcn in the runlist of @ni at which to start freeing clusters * @count: number of clusters to free or -1 for all clusters + * @ctx: active attribute search context if present or NULL if not * * Free @count clusters starting at the cluster @start_vcn in the runlist * described by the ntfs inode @ni. @@ -59,12 +62,36 @@ extern s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, * deallocated. Thus, to completely free all clusters in a runlist, use * @start_vcn = 0 and @count = -1. * - * Note, ntfs_cluster_free() does not modify the runlist at all, so the caller - * has to deal with it later. + * If @ctx is specified, it is an active search context of @ni and its base mft + * record. This is needed when ntfs_cluster_free() encounters unmapped runlist + * fragments and allows their mapping. If you do not have the mft record + * mapped, you can specify @ctx as NULL and ntfs_cluster_free() will perform + * the necessary mapping and unmapping. + * + * Note, ntfs_cluster_free() saves the state of @ctx on entry and restores it + * before returning. Thus, @ctx will be left pointing to the same attribute on + * return as on entry. However, the actual pointers in @ctx may point to + * different memory locations on return, so you must remember to reset any + * cached pointers from the @ctx, i.e. after the call to ntfs_cluster_free(), + * you will probably want to do: + * m = ctx->mrec; + * a = ctx->attr; + * Assuming you cache ctx->attr in a variable @a of type ATTR_RECORD * and that + * you cache ctx->mrec in a variable @m of type MFT_RECORD *. + * + * Note, ntfs_cluster_free() does not modify the runlist, so you have to remove + * from the runlist or mark sparse the freed runs later. * * Return the number of deallocated clusters (not counting sparse ones) on * success and -errno on error. * + * WARNING: If @ctx is supplied, regardless of whether success or failure is + * returned, you need to check IS_ERR(@ctx->mrec) and if TRUE the @ctx + * is no longer valid, i.e. you need to either call + * ntfs_attr_reinit_search_ctx() or ntfs_attr_put_search_ctx() on it. + * In that case PTR_ERR(@ctx->mrec) will give you the error code for + * why the mapping of the old inode failed. + * * Locking: - The runlist described by @ni must be locked for writing on entry * and is locked on return. Note the runlist may be modified when * needed runlist fragments need to be mapped. @@ -72,11 +99,15 @@ extern s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, * on return. * - This function takes the volume lcn bitmap lock for writing and * modifies the bitmap contents. + * - If @ctx is NULL, the base mft record of @ni must not be mapped on + * entry and it will be left unmapped on return. + * - If @ctx is not NULL, the base mft record must be mapped on entry + * and it will be left mapped on return. */ static inline s64 ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, - s64 count) + s64 count, ntfs_attr_search_ctx *ctx) { - return __ntfs_cluster_free(ni, start_vcn, count, FALSE); + return __ntfs_cluster_free(ni, start_vcn, count, ctx, FALSE); } extern int ntfs_cluster_free_from_rl_nolock(ntfs_volume *vol, diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h index 590887b943f..e38e402e410 100644 --- a/fs/ntfs/malloc.h +++ b/fs/ntfs/malloc.h @@ -39,8 +39,7 @@ * If there was insufficient memory to complete the request, return NULL. * Depending on @gfp_mask the allocation may be guaranteed to succeed. */ -static inline void *__ntfs_malloc(unsigned long size, - gfp_t gfp_mask) +static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask) { if (likely(size <= PAGE_SIZE)) { BUG_ON(!size); diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c index b011369b595..0c65cbb8c5c 100644 --- a/fs/ntfs/mft.c +++ b/fs/ntfs/mft.c @@ -49,7 +49,8 @@ static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni) ntfs_volume *vol = ni->vol; struct inode *mft_vi = vol->mft_ino; struct page *page; - unsigned long index, ofs, end_index; + unsigned long index, end_index; + unsigned ofs; BUG_ON(ni->page); /* @@ -1308,7 +1309,7 @@ static int ntfs_mft_bitmap_extend_allocation_nolock(ntfs_volume *vol) ll = mftbmp_ni->allocated_size; read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); rl = ntfs_attr_find_vcn_nolock(mftbmp_ni, - (ll - 1) >> vol->cluster_size_bits, TRUE); + (ll - 1) >> vol->cluster_size_bits, NULL); if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) { up_write(&mftbmp_ni->runlist.lock); ntfs_error(vol->sb, "Failed to determine last allocated " @@ -1354,7 +1355,8 @@ static int ntfs_mft_bitmap_extend_allocation_nolock(ntfs_volume *vol) up_write(&vol->lcnbmp_lock); ntfs_unmap_page(page); /* Allocate a cluster from the DATA_ZONE. */ - rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE); + rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE, + TRUE); if (IS_ERR(rl2)) { up_write(&mftbmp_ni->runlist.lock); ntfs_error(vol->sb, "Failed to allocate a cluster for " @@ -1738,7 +1740,7 @@ static int ntfs_mft_data_extend_allocation_nolock(ntfs_volume *vol) ll = mft_ni->allocated_size; read_unlock_irqrestore(&mft_ni->size_lock, flags); rl = ntfs_attr_find_vcn_nolock(mft_ni, - (ll - 1) >> vol->cluster_size_bits, TRUE); + (ll - 1) >> vol->cluster_size_bits, NULL); if (unlikely(IS_ERR(rl) || !rl->length || rl->lcn < 0)) { up_write(&mft_ni->runlist.lock); ntfs_error(vol->sb, "Failed to determine last allocated " @@ -1779,7 +1781,8 @@ static int ntfs_mft_data_extend_allocation_nolock(ntfs_volume *vol) nr > min_nr ? "default" : "minimal", (long long)nr); old_last_vcn = rl[1].vcn; do { - rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE); + rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE, + TRUE); if (likely(!IS_ERR(rl2))) break; if (PTR_ERR(rl2) != -ENOSPC || nr == min_nr) { @@ -1951,20 +1954,21 @@ restore_undo_alloc: NVolSetErrors(vol); return ret; } - a = ctx->attr; - a->data.non_resident.highest_vcn = cpu_to_sle64(old_last_vcn - 1); + ctx->attr->data.non_resident.highest_vcn = + cpu_to_sle64(old_last_vcn - 1); undo_alloc: - if (ntfs_cluster_free(mft_ni, old_last_vcn, -1) < 0) { + if (ntfs_cluster_free(mft_ni, old_last_vcn, -1, ctx) < 0) { ntfs_error(vol->sb, "Failed to free clusters from mft data " "attribute.%s", es); NVolSetErrors(vol); } + a = ctx->attr; if (ntfs_rl_truncate_nolock(vol, &mft_ni->runlist, old_last_vcn)) { ntfs_error(vol->sb, "Failed to truncate mft data attribute " "runlist.%s", es); NVolSetErrors(vol); } - if (mp_rebuilt) { + if (mp_rebuilt && !IS_ERR(ctx->mrec)) { if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu( a->data.non_resident.mapping_pairs_offset), old_alen - le16_to_cpu( @@ -1981,6 +1985,10 @@ undo_alloc: } flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); + } else if (IS_ERR(ctx->mrec)) { + ntfs_error(vol->sb, "Failed to restore attribute search " + "context.%s", es); + NVolSetErrors(vol); } if (ctx) ntfs_attr_put_search_ctx(ctx); diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index 453d0d51ea4..6c16db9e1a8 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -1447,7 +1447,7 @@ not_enabled: if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) { ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max " "attribute (size is 0x%llx but should be at " - "least 0x%x bytes).", i_size_read(tmp_ino), + "least 0x%zx bytes).", i_size_read(tmp_ino), sizeof(USN_HEADER)); return FALSE; } diff --git a/fs/open.c b/fs/open.c index f0d90cf0495..8d06ec911fd 100644 --- a/fs/open.c +++ b/fs/open.c @@ -739,7 +739,8 @@ asmlinkage long sys_fchown(unsigned int fd, uid_t user, gid_t group) } static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt, - int flags, struct file *f) + int flags, struct file *f, + int (*open)(struct inode *, struct file *)) { struct inode *inode; int error; @@ -761,11 +762,14 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt, f->f_op = fops_get(inode->i_fop); file_move(f, &inode->i_sb->s_files); - if (f->f_op && f->f_op->open) { - error = f->f_op->open(inode,f); + if (!open && f->f_op) + open = f->f_op->open; + if (open) { + error = open(inode, f); if (error) goto cleanup_all; } + f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping); @@ -814,28 +818,75 @@ struct file *filp_open(const char * filename, int flags, int mode) { int namei_flags, error; struct nameidata nd; - struct file *f; namei_flags = flags; if ((namei_flags+1) & O_ACCMODE) namei_flags++; - if (namei_flags & O_TRUNC) - namei_flags |= 2; - - error = -ENFILE; - f = get_empty_filp(); - if (f == NULL) - return ERR_PTR(error); error = open_namei(filename, namei_flags, mode, &nd); if (!error) - return __dentry_open(nd.dentry, nd.mnt, flags, f); + return nameidata_to_filp(&nd, flags); - put_filp(f); return ERR_PTR(error); } EXPORT_SYMBOL(filp_open); +/** + * lookup_instantiate_filp - instantiates the open intent filp + * @nd: pointer to nameidata + * @dentry: pointer to dentry + * @open: open callback + * + * Helper for filesystems that want to use lookup open intents and pass back + * a fully instantiated struct file to the caller. + * This function is meant to be called from within a filesystem's + * lookup method. + * Note that in case of error, nd->intent.open.file is destroyed, but the + * path information remains valid. + * If the open callback is set to NULL, then the standard f_op->open() + * filesystem callback is substituted. + */ +struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry, + int (*open)(struct inode *, struct file *)) +{ + if (IS_ERR(nd->intent.open.file)) + goto out; + if (IS_ERR(dentry)) + goto out_err; + nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->mnt), + nd->intent.open.flags - 1, + nd->intent.open.file, + open); +out: + return nd->intent.open.file; +out_err: + release_open_intent(nd); + nd->intent.open.file = (struct file *)dentry; + goto out; +} +EXPORT_SYMBOL_GPL(lookup_instantiate_filp); + +/** + * nameidata_to_filp - convert a nameidata to an open filp. + * @nd: pointer to nameidata + * @flags: open flags + * + * Note that this function destroys the original nameidata + */ +struct file *nameidata_to_filp(struct nameidata *nd, int flags) +{ + struct file *filp; + + /* Pick up the filp from the open intent */ + filp = nd->intent.open.file; + /* Has the filesystem initialised the file for us? */ + if (filp->f_dentry == NULL) + filp = __dentry_open(nd->dentry, nd->mnt, flags, filp, NULL); + else + path_release(nd); + return filp; +} + struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) { int error; @@ -846,7 +897,7 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) if (f == NULL) return ERR_PTR(error); - return __dentry_open(dentry, mnt, flags, f); + return __dentry_open(dentry, mnt, flags, f, NULL); } EXPORT_SYMBOL(dentry_open); diff --git a/fs/partitions/check.c b/fs/partitions/check.c index 77e178f1316..9c06c5434ec 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -192,6 +192,7 @@ check_partition(struct gendisk *hd, struct block_device *bdev) struct part_attribute { struct attribute attr; ssize_t (*show)(struct hd_struct *,char *); + ssize_t (*store)(struct hd_struct *,const char *, size_t); }; static ssize_t @@ -201,14 +202,33 @@ part_attr_show(struct kobject * kobj, struct attribute * attr, char * page) struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); ssize_t ret = 0; if (part_attr->show) - ret = part_attr->show(p,page); + ret = part_attr->show(p, page); + return ret; +} +static ssize_t +part_attr_store(struct kobject * kobj, struct attribute * attr, + const char *page, size_t count) +{ + struct hd_struct * p = container_of(kobj,struct hd_struct,kobj); + struct part_attribute * part_attr = container_of(attr,struct part_attribute,attr); + ssize_t ret = 0; + + if (part_attr->store) + ret = part_attr->store(p, page, count); return ret; } static struct sysfs_ops part_sysfs_ops = { .show = part_attr_show, + .store = part_attr_store, }; +static ssize_t part_uevent_store(struct hd_struct * p, + const char *page, size_t count) +{ + kobject_hotplug(&p->kobj, KOBJ_ADD); + return count; +} static ssize_t part_dev_read(struct hd_struct * p, char *page) { struct gendisk *disk = container_of(p->kobj.parent,struct gendisk,kobj); @@ -229,6 +249,10 @@ static ssize_t part_stat_read(struct hd_struct * p, char *page) p->reads, (unsigned long long)p->read_sectors, p->writes, (unsigned long long)p->write_sectors); } +static struct part_attribute part_attr_uevent = { + .attr = {.name = "uevent", .mode = S_IWUSR }, + .store = part_uevent_store +}; static struct part_attribute part_attr_dev = { .attr = {.name = "dev", .mode = S_IRUGO }, .show = part_dev_read @@ -247,6 +271,7 @@ static struct part_attribute part_attr_stat = { }; static struct attribute * default_attrs[] = { + &part_attr_uevent.attr, &part_attr_dev.attr, &part_attr_start.attr, &part_attr_size.attr, @@ -430,7 +455,7 @@ void del_gendisk(struct gendisk *disk) disk->flags &= ~GENHD_FL_UP; unlink_gendisk(disk); disk_stat_set_all(disk, 0); - disk->stamp = disk->stamp_idle = 0; + disk->stamp = 0; devfs_remove_disk(disk); diff --git a/fs/proc/array.c b/fs/proc/array.c index d84eecacbea..3e1239e4b30 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -438,7 +438,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole) jiffies_to_clock_t(it_real_value), start_time, vsize, - mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */ + mm ? get_mm_rss(mm) : 0, rsslim, mm ? mm->start_code : 0, mm ? mm->end_code : 0, diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 8a8c34461d4..b638fb50074 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -533,7 +533,7 @@ static void proc_kill_inodes(struct proc_dir_entry *de) */ file_list_lock(); list_for_each(p, &sb->s_files) { - struct file * filp = list_entry(p, struct file, f_list); + struct file * filp = list_entry(p, struct file, f_u.fu_list); struct dentry * dentry = filp->f_dentry; struct inode * inode; struct file_operations *fops; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index effa6c0c467..e6a818a93f3 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -156,10 +156,13 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, WARN_ON(de && de->deleted); + if (de != NULL && !try_module_get(de->owner)) + goto out_mod; + inode = iget(sb, ino); if (!inode) - goto out_fail; - + goto out_ino; + PROC_I(inode)->pde = de; if (de) { if (de->mode) { @@ -171,20 +174,20 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, inode->i_size = de->size; if (de->nlink) inode->i_nlink = de->nlink; - if (!try_module_get(de->owner)) - goto out_fail; if (de->proc_iops) inode->i_op = de->proc_iops; if (de->proc_fops) inode->i_fop = de->proc_fops; } -out: return inode; -out_fail: +out_ino: + if (de != NULL) + module_put(de->owner); +out_mod: de_put(de); - goto out; + return NULL; } int proc_fill_super(struct super_block *s, void *data, int silent) diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index a3453555a94..5b6b0b6038a 100644 --- a/fs/proc/proc_misc.c +++ b/fs/proc/proc_misc.c @@ -629,12 +629,4 @@ void __init proc_misc_init(void) if (entry) entry->proc_fops = &proc_sysrq_trigger_operations; #endif -#ifdef CONFIG_PPC32 - { - extern struct file_operations ppc_htab_operations; - entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL); - if (entry) - entry->proc_fops = &ppc_htab_operations; - } -#endif } diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index c7ef3e48e35..d2fa42006d8 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -14,22 +14,41 @@ char *task_mem(struct mm_struct *mm, char *buffer) { unsigned long data, text, lib; + unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss; + + /* + * Note: to minimize their overhead, mm maintains hiwater_vm and + * hiwater_rss only when about to *lower* total_vm or rss. Any + * collector of these hiwater stats must therefore get total_vm + * and rss too, which will usually be the higher. Barriers? not + * worth the effort, such snapshots can always be inconsistent. + */ + hiwater_vm = total_vm = mm->total_vm; + if (hiwater_vm < mm->hiwater_vm) + hiwater_vm = mm->hiwater_vm; + hiwater_rss = total_rss = get_mm_rss(mm); + if (hiwater_rss < mm->hiwater_rss) + hiwater_rss = mm->hiwater_rss; data = mm->total_vm - mm->shared_vm - mm->stack_vm; text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; buffer += sprintf(buffer, + "VmPeak:\t%8lu kB\n" "VmSize:\t%8lu kB\n" "VmLck:\t%8lu kB\n" + "VmHWM:\t%8lu kB\n" "VmRSS:\t%8lu kB\n" "VmData:\t%8lu kB\n" "VmStk:\t%8lu kB\n" "VmExe:\t%8lu kB\n" "VmLib:\t%8lu kB\n" "VmPTE:\t%8lu kB\n", - (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), + hiwater_vm << (PAGE_SHIFT-10), + (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), mm->locked_vm << (PAGE_SHIFT-10), - get_mm_counter(mm, rss) << (PAGE_SHIFT-10), + hiwater_rss << (PAGE_SHIFT-10), + total_rss << (PAGE_SHIFT-10), data << (PAGE_SHIFT-10), mm->stack_vm << (PAGE_SHIFT-10), text, lib, (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10); @@ -44,13 +63,11 @@ unsigned long task_vsize(struct mm_struct *mm) int task_statm(struct mm_struct *mm, int *shared, int *text, int *data, int *resident) { - int rss = get_mm_counter(mm, rss); - - *shared = rss - get_mm_counter(mm, anon_rss); + *shared = get_mm_counter(mm, file_rss); *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> PAGE_SHIFT; *data = mm->total_vm - mm->shared_vm; - *resident = rss; + *resident = *shared + get_mm_counter(mm, anon_rss); return mm->total_vm; } @@ -186,13 +203,14 @@ static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd, struct mem_size_stats *mss) { pte_t *pte, ptent; + spinlock_t *ptl; unsigned long pfn; struct page *page; - pte = pte_offset_map(pmd, addr); + pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); do { ptent = *pte; - if (pte_none(ptent) || !pte_present(ptent)) + if (!pte_present(ptent)) continue; mss->resident += PAGE_SIZE; @@ -213,8 +231,8 @@ static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd, mss->private_clean += PAGE_SIZE; } } while (pte++, addr += PAGE_SIZE, addr != end); - pte_unmap(pte - 1); - cond_resched_lock(&vma->vm_mm->page_table_lock); + pte_unmap_unlock(pte - 1, ptl); + cond_resched(); } static inline void smaps_pmd_range(struct vm_area_struct *vma, pud_t *pud, @@ -268,17 +286,11 @@ static inline void smaps_pgd_range(struct vm_area_struct *vma, static int show_smap(struct seq_file *m, void *v) { struct vm_area_struct *vma = v; - struct mm_struct *mm = vma->vm_mm; struct mem_size_stats mss; memset(&mss, 0, sizeof mss); - - if (mm) { - spin_lock(&mm->page_table_lock); + if (vma->vm_mm) smaps_pgd_range(vma, vma->vm_start, vma->vm_end, &mss); - spin_unlock(&mm->page_table_lock); - } - return show_map_internal(m, v, &mss); } @@ -407,7 +419,6 @@ static struct numa_maps *get_numa_maps(const struct vm_area_struct *vma) for_each_node(i) md->node[i] =0; - spin_lock(&mm->page_table_lock); for (vaddr = vma->vm_start; vaddr < vma->vm_end; vaddr += PAGE_SIZE) { page = follow_page(mm, vaddr, 0); if (page) { @@ -422,8 +433,8 @@ static struct numa_maps *get_numa_maps(const struct vm_area_struct *vma) md->anon++; md->node[page_to_nid(page)]++; } + cond_resched(); } - spin_unlock(&mm->page_table_lock); return md; } @@ -469,7 +480,7 @@ static int show_numa_map(struct seq_file *m, void *v) seq_printf(m, " interleave={"); first = 1; for_each_node(n) { - if (test_bit(n, pol->v.nodes)) { + if (node_isset(n, pol->v.nodes)) { if (!first) seq_putc(m,','); else diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c index 2706e2adffa..45829889dcd 100644 --- a/fs/reiserfs/fix_node.c +++ b/fs/reiserfs/fix_node.c @@ -2022,7 +2022,7 @@ static int get_neighbors(struct tree_balance *p_s_tb, int n_h) } #ifdef CONFIG_REISERFS_CHECK -void *reiserfs_kmalloc(size_t size, int flags, struct super_block *s) +void *reiserfs_kmalloc(size_t size, gfp_t flags, struct super_block *s) { void *vp; static size_t malloced; diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index d76ee6c4f9b..5f82352b97e 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -2842,7 +2842,7 @@ static int reiserfs_set_page_dirty(struct page *page) * even in -o notail mode, we can't be sure an old mount without -o notail * didn't create files with tails. */ -static int reiserfs_releasepage(struct page *page, int unused_gfp_flags) +static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags) { struct inode *inode = page->mapping->host; struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb); diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 44b02fc02eb..42afb5bef11 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -1024,12 +1024,8 @@ static int reiserfs_parse_options(struct super_block *s, char *options, /* strin strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg); *mount_options |= 1 << REISERFS_QUOTA; } else { - if (REISERFS_SB(s)->s_qf_names[qtype]) { - kfree(REISERFS_SB(s)-> - s_qf_names[qtype]); - REISERFS_SB(s)->s_qf_names[qtype] = - NULL; - } + kfree(REISERFS_SB(s)->s_qf_names[qtype]); + REISERFS_SB(s)->s_qf_names[qtype] = NULL; } } if (c == 'f') { @@ -1158,11 +1154,10 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) if (!reiserfs_parse_options (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) { #ifdef CONFIG_QUOTA - for (i = 0; i < MAXQUOTAS; i++) - if (REISERFS_SB(s)->s_qf_names[i]) { - kfree(REISERFS_SB(s)->s_qf_names[i]); - REISERFS_SB(s)->s_qf_names[i] = NULL; - } + for (i = 0; i < MAXQUOTAS; i++) { + kfree(REISERFS_SB(s)->s_qf_names[i]); + REISERFS_SB(s)->s_qf_names[i] = NULL; + } #endif return -EINVAL; } @@ -1940,13 +1935,11 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) brelse(SB_BUFFER_WITH_SB(s)); #ifdef CONFIG_QUOTA for (j = 0; j < MAXQUOTAS; j++) { - if (sbi->s_qf_names[j]) - kfree(sbi->s_qf_names[j]); + kfree(sbi->s_qf_names[j]); + sbi->s_qf_names[j] = NULL; } #endif - if (sbi != NULL) { - kfree(sbi); - } + kfree(sbi); s->s_fs_info = NULL; return errval; diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 87ac9dc8b38..72e12079867 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -453,7 +453,7 @@ static struct page *reiserfs_get_page(struct inode *dir, unsigned long n) struct page *page; /* We can deadlock if we try to free dentries, and an unlink/rmdir has just occured - GFP_NOFS avoids this */ - mapping->flags = (mapping->flags & ~__GFP_BITS_MASK) | GFP_NOFS; + mapping_set_gfp_mask(mapping, GFP_NOFS); page = read_cache_page(mapping, n, (filler_t *) mapping->a_ops->readpage, NULL); if (!IS_ERR(page)) { diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index 6703efa3c43..a47ac9aac8b 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -296,8 +296,7 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) } } - if (value) - kfree(value); + kfree(value); if (!error) { /* Release the old one */ diff --git a/fs/super.c b/fs/super.c index 6e57ee252e1..f60155ec778 100644 --- a/fs/super.c +++ b/fs/super.c @@ -513,7 +513,7 @@ static void mark_files_ro(struct super_block *sb) struct file *f; file_list_lock(); - list_for_each_entry(f, &sb->s_files, f_list) { + list_for_each_entry(f, &sb->s_files, f_u.fu_list) { if (S_ISREG(f->f_dentry->d_inode->i_mode) && file_count(f)) f->f_mode &= ~FMODE_WRITE; } diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c index 1c6f6b57ef1..ef46939c0c1 100644 --- a/fs/vfat/namei.c +++ b/fs/vfat/namei.c @@ -621,8 +621,7 @@ static int vfat_build_slots(struct inode *dir, const unsigned char *name, } /* build the entry of long file name */ - for (cksum = i = 0; i < 11; i++) - cksum = (((cksum&1)<<7)|((cksum&0xfe)>>1)) + msdos_name[i]; + cksum = fat_checksum(msdos_name); *nr_slots = usize / 13; for (ps = slots, i = *nr_slots; i > 0; i--, ps++) { @@ -888,10 +887,10 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry, { struct buffer_head *dotdot_bh; struct msdos_dir_entry *dotdot_de; - loff_t dotdot_i_pos; struct inode *old_inode, *new_inode; struct fat_slot_info old_sinfo, sinfo; struct timespec ts; + loff_t dotdot_i_pos, new_i_pos; int err, is_dir, update_dotdot, corrupt = 0; old_sinfo.bh = sinfo.bh = dotdot_bh = NULL; @@ -914,31 +913,24 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry, ts = CURRENT_TIME_SEC; if (new_inode) { - err = vfat_find(new_dir, &new_dentry->d_name, &sinfo); - if (err) - goto out; - if (MSDOS_I(new_inode)->i_pos != sinfo.i_pos) { - /* WTF??? Cry and fail. */ - printk(KERN_WARNING "vfat_rename: fs corrupted\n"); - goto out; - } - if (is_dir) { err = fat_dir_empty(new_inode); if (err) goto out; } + new_i_pos = MSDOS_I(new_inode)->i_pos; fat_detach(new_inode); } else { err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0, &ts, &sinfo); if (err) goto out; + new_i_pos = sinfo.i_pos; } new_dir->i_version++; fat_detach(old_inode); - fat_attach(old_inode, sinfo.i_pos); + fat_attach(old_inode, new_i_pos); if (IS_DIRSYNC(new_dir)) { err = fat_sync_inode(old_inode); if (err) @@ -1002,7 +994,7 @@ error_inode: fat_detach(old_inode); fat_attach(old_inode, old_sinfo.i_pos); if (new_inode) { - fat_attach(new_inode, sinfo.i_pos); + fat_attach(new_inode, new_i_pos); if (corrupt) corrupt |= fat_sync_inode(new_inode); } else { diff --git a/fs/xattr.c b/fs/xattr.c index 3f9c64bea15..f6e00c0e114 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -143,7 +143,7 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size) if (size) { if (size > XATTR_SIZE_MAX) size = XATTR_SIZE_MAX; - kvalue = kmalloc(size, GFP_KERNEL); + kvalue = kzalloc(size, GFP_KERNEL); if (!kvalue) return -ENOMEM; } @@ -154,11 +154,15 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size) error = -EOPNOTSUPP; if (d->d_inode->i_op && d->d_inode->i_op->getxattr) error = d->d_inode->i_op->getxattr(d, kname, kvalue, size); - else if (!strncmp(kname, XATTR_SECURITY_PREFIX, - sizeof XATTR_SECURITY_PREFIX - 1)) { + + if (!strncmp(kname, XATTR_SECURITY_PREFIX, + sizeof XATTR_SECURITY_PREFIX - 1)) { const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1; - error = security_inode_getsecurity(d->d_inode, suffix, kvalue, - size); + int rv = security_inode_getsecurity(d->d_inode, suffix, kvalue, + size, error); + /* Security module active: overwrite error value */ + if (rv != -EOPNOTSUPP) + error = rv; } if (error > 0) { if (size && copy_to_user(value, kvalue, error)) diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c index d2653b589b1..3c92162dc72 100644 --- a/fs/xfs/linux-2.6/kmem.c +++ b/fs/xfs/linux-2.6/kmem.c @@ -45,11 +45,11 @@ void * -kmem_alloc(size_t size, gfp_t flags) +kmem_alloc(size_t size, unsigned int __nocast flags) { - int retries = 0; - unsigned int lflags = kmem_flags_convert(flags); - void *ptr; + int retries = 0; + gfp_t lflags = kmem_flags_convert(flags); + void *ptr; do { if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) @@ -67,7 +67,7 @@ kmem_alloc(size_t size, gfp_t flags) } void * -kmem_zalloc(size_t size, gfp_t flags) +kmem_zalloc(size_t size, unsigned int __nocast flags) { void *ptr; @@ -90,7 +90,7 @@ kmem_free(void *ptr, size_t size) void * kmem_realloc(void *ptr, size_t newsize, size_t oldsize, - gfp_t flags) + unsigned int __nocast flags) { void *new; @@ -105,11 +105,11 @@ kmem_realloc(void *ptr, size_t newsize, size_t oldsize, } void * -kmem_zone_alloc(kmem_zone_t *zone, gfp_t flags) +kmem_zone_alloc(kmem_zone_t *zone, unsigned int __nocast flags) { - int retries = 0; - unsigned int lflags = kmem_flags_convert(flags); - void *ptr; + int retries = 0; + gfp_t lflags = kmem_flags_convert(flags); + void *ptr; do { ptr = kmem_cache_alloc(zone, lflags); @@ -124,7 +124,7 @@ kmem_zone_alloc(kmem_zone_t *zone, gfp_t flags) } void * -kmem_zone_zalloc(kmem_zone_t *zone, gfp_t flags) +kmem_zone_zalloc(kmem_zone_t *zone, unsigned int __nocast flags) { void *ptr; diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h index ee7010f085b..f4bb78c268c 100644 --- a/fs/xfs/linux-2.6/kmem.h +++ b/fs/xfs/linux-2.6/kmem.h @@ -81,9 +81,9 @@ typedef unsigned long xfs_pflags_t; *(NSTATEP) = *(OSTATEP); \ } while (0) -static __inline unsigned int kmem_flags_convert(gfp_t flags) +static __inline gfp_t kmem_flags_convert(unsigned int __nocast flags) { - unsigned int lflags = __GFP_NOWARN; /* we'll report problems, if need be */ + gfp_t lflags = __GFP_NOWARN; /* we'll report problems, if need be */ #ifdef DEBUG if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) { @@ -125,16 +125,16 @@ kmem_zone_destroy(kmem_zone_t *zone) BUG(); } -extern void *kmem_zone_zalloc(kmem_zone_t *, gfp_t); -extern void *kmem_zone_alloc(kmem_zone_t *, gfp_t); +extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast); +extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast); -extern void *kmem_alloc(size_t, gfp_t); -extern void *kmem_realloc(void *, size_t, size_t, gfp_t); -extern void *kmem_zalloc(size_t, gfp_t); +extern void *kmem_alloc(size_t, unsigned int __nocast); +extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast); +extern void *kmem_zalloc(size_t, unsigned int __nocast); extern void kmem_free(void *, size_t); typedef struct shrinker *kmem_shaker_t; -typedef int (*kmem_shake_func_t)(int, unsigned int); +typedef int (*kmem_shake_func_t)(int, gfp_t); static __inline kmem_shaker_t kmem_shake_register(kmem_shake_func_t sfunc) @@ -149,7 +149,7 @@ kmem_shake_deregister(kmem_shaker_t shrinker) } static __inline int -kmem_shake_allow(unsigned int gfp_mask) +kmem_shake_allow(gfp_t gfp_mask) { return (gfp_mask & __GFP_WAIT); } diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c6c077978fe..7aa39872470 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -1296,7 +1296,7 @@ linvfs_invalidate_page( STATIC int linvfs_release_page( struct page *page, - int gfp_mask) + gfp_t gfp_mask) { struct inode *inode = page->mapping->host; int dirty, delalloc, unmapped, unwritten; diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index e82cf72ac59..4cd46abe843 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -64,7 +64,7 @@ STATIC kmem_cache_t *pagebuf_zone; STATIC kmem_shaker_t pagebuf_shake; -STATIC int xfsbufd_wakeup(int, unsigned int); +STATIC int xfsbufd_wakeup(int, gfp_t); STATIC void pagebuf_delwri_queue(xfs_buf_t *, int); STATIC struct workqueue_struct *xfslogd_workqueue; @@ -181,8 +181,9 @@ set_page_region( size_t offset, size_t length) { - page->private |= page_region_mask(offset, length); - if (page->private == ~0UL) + set_page_private(page, + page_private(page) | page_region_mask(offset, length)); + if (page_private(page) == ~0UL) SetPageUptodate(page); } @@ -194,7 +195,7 @@ test_page_region( { unsigned long mask = page_region_mask(offset, length); - return (mask && (page->private & mask) == mask); + return (mask && (page_private(page) & mask) == mask); } /* @@ -383,7 +384,7 @@ _pagebuf_lookup_pages( size_t blocksize = bp->pb_target->pbr_bsize; size_t size = bp->pb_count_desired; size_t nbytes, offset; - int gfp_mask = pb_to_gfp(flags); + gfp_t gfp_mask = pb_to_gfp(flags); unsigned short page_count, i; pgoff_t first; loff_t end; @@ -1749,8 +1750,8 @@ STATIC int xfsbufd_force_sleep; STATIC int xfsbufd_wakeup( - int priority, - unsigned int mask) + int priority, + gfp_t mask) { if (xfsbufd_force_sleep) return 0; |