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authorSteven Whitehouse <swhiteho@redhat.com>2009-05-22 10:01:55 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2009-05-22 10:01:55 +0100
commitb1e71b0622974953e46a284aa986504a90869a9b (patch)
tree0eb0f68c8b432b6332437e918ca2ab4e0c72d897 /fs/gfs2/ops_file.c
parent1ce97e564b628bee30b8dbb64e5e653a484308f6 (diff)
GFS2: Clean up some file names
This patch renames the ops_*.c files which have no counterpart without the ops_ prefix in order to shorten the name and make it more readable. In addition, ops_address.h (which was very small) is moved into inode.h and inode.h is cleaned up by adding extern where required. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/ops_file.c')
-rw-r--r--fs/gfs2/ops_file.c766
1 files changed, 0 insertions, 766 deletions
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
deleted file mode 100644
index 0ee7bd287c5..00000000000
--- a/fs/gfs2/ops_file.c
+++ /dev/null
@@ -1,766 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/pagemap.h>
-#include <linux/uio.h>
-#include <linux/blkdev.h>
-#include <linux/mm.h>
-#include <linux/mount.h>
-#include <linux/fs.h>
-#include <linux/gfs2_ondisk.h>
-#include <linux/ext2_fs.h>
-#include <linux/crc32.h>
-#include <linux/writeback.h>
-#include <asm/uaccess.h>
-#include <linux/dlm.h>
-#include <linux/dlm_plock.h>
-
-#include "gfs2.h"
-#include "incore.h"
-#include "bmap.h"
-#include "dir.h"
-#include "glock.h"
-#include "glops.h"
-#include "inode.h"
-#include "log.h"
-#include "meta_io.h"
-#include "quota.h"
-#include "rgrp.h"
-#include "trans.h"
-#include "util.h"
-#include "eaops.h"
-#include "ops_address.h"
-
-/**
- * gfs2_llseek - seek to a location in a file
- * @file: the file
- * @offset: the offset
- * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END)
- *
- * SEEK_END requires the glock for the file because it references the
- * file's size.
- *
- * Returns: The new offset, or errno
- */
-
-static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
-{
- struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
- struct gfs2_holder i_gh;
- loff_t error;
-
- if (origin == 2) {
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
- &i_gh);
- if (!error) {
- error = generic_file_llseek_unlocked(file, offset, origin);
- gfs2_glock_dq_uninit(&i_gh);
- }
- } else
- error = generic_file_llseek_unlocked(file, offset, origin);
-
- return error;
-}
-
-/**
- * gfs2_readdir - Read directory entries from a directory
- * @file: The directory to read from
- * @dirent: Buffer for dirents
- * @filldir: Function used to do the copying
- *
- * Returns: errno
- */
-
-static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
-{
- struct inode *dir = file->f_mapping->host;
- struct gfs2_inode *dip = GFS2_I(dir);
- struct gfs2_holder d_gh;
- u64 offset = file->f_pos;
- int error;
-
- gfs2_holder_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
- error = gfs2_glock_nq(&d_gh);
- if (error) {
- gfs2_holder_uninit(&d_gh);
- return error;
- }
-
- error = gfs2_dir_read(dir, &offset, dirent, filldir);
-
- gfs2_glock_dq_uninit(&d_gh);
-
- file->f_pos = offset;
-
- return error;
-}
-
-/**
- * fsflags_cvt
- * @table: A table of 32 u32 flags
- * @val: a 32 bit value to convert
- *
- * This function can be used to convert between fsflags values and
- * GFS2's own flags values.
- *
- * Returns: the converted flags
- */
-static u32 fsflags_cvt(const u32 *table, u32 val)
-{
- u32 res = 0;
- while(val) {
- if (val & 1)
- res |= *table;
- table++;
- val >>= 1;
- }
- return res;
-}
-
-static const u32 fsflags_to_gfs2[32] = {
- [3] = GFS2_DIF_SYNC,
- [4] = GFS2_DIF_IMMUTABLE,
- [5] = GFS2_DIF_APPENDONLY,
- [7] = GFS2_DIF_NOATIME,
- [12] = GFS2_DIF_EXHASH,
- [14] = GFS2_DIF_INHERIT_JDATA,
-};
-
-static const u32 gfs2_to_fsflags[32] = {
- [gfs2fl_Sync] = FS_SYNC_FL,
- [gfs2fl_Immutable] = FS_IMMUTABLE_FL,
- [gfs2fl_AppendOnly] = FS_APPEND_FL,
- [gfs2fl_NoAtime] = FS_NOATIME_FL,
- [gfs2fl_ExHash] = FS_INDEX_FL,
- [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
-};
-
-static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder gh;
- int error;
- u32 fsflags;
-
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
- error = gfs2_glock_nq(&gh);
- if (error)
- return error;
-
- fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_diskflags);
- if (!S_ISDIR(inode->i_mode) && ip->i_diskflags & GFS2_DIF_JDATA)
- fsflags |= FS_JOURNAL_DATA_FL;
- if (put_user(fsflags, ptr))
- error = -EFAULT;
-
- gfs2_glock_dq(&gh);
- gfs2_holder_uninit(&gh);
- return error;
-}
-
-void gfs2_set_inode_flags(struct inode *inode)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- unsigned int flags = inode->i_flags;
-
- flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
- if (ip->i_diskflags & GFS2_DIF_IMMUTABLE)
- flags |= S_IMMUTABLE;
- if (ip->i_diskflags & GFS2_DIF_APPENDONLY)
- flags |= S_APPEND;
- if (ip->i_diskflags & GFS2_DIF_NOATIME)
- flags |= S_NOATIME;
- if (ip->i_diskflags & GFS2_DIF_SYNC)
- flags |= S_SYNC;
- inode->i_flags = flags;
-}
-
-/* Flags that can be set by user space */
-#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \
- GFS2_DIF_IMMUTABLE| \
- GFS2_DIF_APPENDONLY| \
- GFS2_DIF_NOATIME| \
- GFS2_DIF_SYNC| \
- GFS2_DIF_SYSTEM| \
- GFS2_DIF_INHERIT_JDATA)
-
-/**
- * gfs2_set_flags - set flags on an inode
- * @inode: The inode
- * @flags: The flags to set
- * @mask: Indicates which flags are valid
- *
- */
-static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- struct buffer_head *bh;
- struct gfs2_holder gh;
- int error;
- u32 new_flags, flags;
-
- error = mnt_want_write(filp->f_path.mnt);
- if (error)
- return error;
-
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
- if (error)
- goto out_drop_write;
-
- flags = ip->i_diskflags;
- new_flags = (flags & ~mask) | (reqflags & mask);
- if ((new_flags ^ flags) == 0)
- goto out;
-
- error = -EINVAL;
- if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
- goto out;
-
- error = -EPERM;
- if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
- goto out;
- if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
- goto out;
- if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
- !capable(CAP_LINUX_IMMUTABLE))
- goto out;
- if (!IS_IMMUTABLE(inode)) {
- error = gfs2_permission(inode, MAY_WRITE);
- if (error)
- goto out;
- }
- if ((flags ^ new_flags) & GFS2_DIF_JDATA) {
- if (flags & GFS2_DIF_JDATA)
- gfs2_log_flush(sdp, ip->i_gl);
- error = filemap_fdatawrite(inode->i_mapping);
- if (error)
- goto out;
- error = filemap_fdatawait(inode->i_mapping);
- if (error)
- goto out;
- }
- error = gfs2_trans_begin(sdp, RES_DINODE, 0);
- if (error)
- goto out;
- error = gfs2_meta_inode_buffer(ip, &bh);
- if (error)
- goto out_trans_end;
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- ip->i_diskflags = new_flags;
- gfs2_dinode_out(ip, bh->b_data);
- brelse(bh);
- gfs2_set_inode_flags(inode);
- gfs2_set_aops(inode);
-out_trans_end:
- gfs2_trans_end(sdp);
-out:
- gfs2_glock_dq_uninit(&gh);
-out_drop_write:
- mnt_drop_write(filp->f_path.mnt);
- return error;
-}
-
-static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
- u32 fsflags, gfsflags;
- if (get_user(fsflags, ptr))
- return -EFAULT;
- gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
- if (!S_ISDIR(inode->i_mode)) {
- if (gfsflags & GFS2_DIF_INHERIT_JDATA)
- gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
- return do_gfs2_set_flags(filp, gfsflags, ~0);
- }
- return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
-}
-
-static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
- switch(cmd) {
- case FS_IOC_GETFLAGS:
- return gfs2_get_flags(filp, (u32 __user *)arg);
- case FS_IOC_SETFLAGS:
- return gfs2_set_flags(filp, (u32 __user *)arg);
- }
- return -ENOTTY;
-}
-
-/**
- * gfs2_allocate_page_backing - Use bmap to allocate blocks
- * @page: The (locked) page to allocate backing for
- *
- * We try to allocate all the blocks required for the page in
- * one go. This might fail for various reasons, so we keep
- * trying until all the blocks to back this page are allocated.
- * If some of the blocks are already allocated, thats ok too.
- */
-
-static int gfs2_allocate_page_backing(struct page *page)
-{
- struct inode *inode = page->mapping->host;
- struct buffer_head bh;
- unsigned long size = PAGE_CACHE_SIZE;
- u64 lblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
-
- do {
- bh.b_state = 0;
- bh.b_size = size;
- gfs2_block_map(inode, lblock, &bh, 1);
- if (!buffer_mapped(&bh))
- return -EIO;
- size -= bh.b_size;
- lblock += (bh.b_size >> inode->i_blkbits);
- } while(size > 0);
- return 0;
-}
-
-/**
- * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable
- * @vma: The virtual memory area
- * @page: The page which is about to become writable
- *
- * When the page becomes writable, we need to ensure that we have
- * blocks allocated on disk to back that page.
- */
-
-static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
- struct page *page = vmf->page;
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- unsigned long last_index;
- u64 pos = page->index << PAGE_CACHE_SHIFT;
- unsigned int data_blocks, ind_blocks, rblocks;
- int alloc_required = 0;
- struct gfs2_holder gh;
- struct gfs2_alloc *al;
- int ret;
-
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
- ret = gfs2_glock_nq(&gh);
- if (ret)
- goto out;
-
- set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
- set_bit(GIF_SW_PAGED, &ip->i_flags);
-
- ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required);
- if (ret || !alloc_required)
- goto out_unlock;
- ret = -ENOMEM;
- al = gfs2_alloc_get(ip);
- if (al == NULL)
- goto out_unlock;
-
- ret = gfs2_quota_lock_check(ip);
- if (ret)
- goto out_alloc_put;
- gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
- al->al_requested = data_blocks + ind_blocks;
- ret = gfs2_inplace_reserve(ip);
- if (ret)
- goto out_quota_unlock;
-
- rblocks = RES_DINODE + ind_blocks;
- if (gfs2_is_jdata(ip))
- rblocks += data_blocks ? data_blocks : 1;
- if (ind_blocks || data_blocks)
- rblocks += RES_STATFS + RES_QUOTA;
- ret = gfs2_trans_begin(sdp, rblocks, 0);
- if (ret)
- goto out_trans_fail;
-
- lock_page(page);
- ret = -EINVAL;
- last_index = ip->i_inode.i_size >> PAGE_CACHE_SHIFT;
- if (page->index > last_index)
- goto out_unlock_page;
- ret = 0;
- if (!PageUptodate(page) || page->mapping != ip->i_inode.i_mapping)
- goto out_unlock_page;
- if (gfs2_is_stuffed(ip)) {
- ret = gfs2_unstuff_dinode(ip, page);
- if (ret)
- goto out_unlock_page;
- }
- ret = gfs2_allocate_page_backing(page);
-
-out_unlock_page:
- unlock_page(page);
- gfs2_trans_end(sdp);
-out_trans_fail:
- gfs2_inplace_release(ip);
-out_quota_unlock:
- gfs2_quota_unlock(ip);
-out_alloc_put:
- gfs2_alloc_put(ip);
-out_unlock:
- gfs2_glock_dq(&gh);
-out:
- gfs2_holder_uninit(&gh);
- if (ret == -ENOMEM)
- ret = VM_FAULT_OOM;
- else if (ret)
- ret = VM_FAULT_SIGBUS;
- return ret;
-}
-
-static struct vm_operations_struct gfs2_vm_ops = {
- .fault = filemap_fault,
- .page_mkwrite = gfs2_page_mkwrite,
-};
-
-/**
- * gfs2_mmap -
- * @file: The file to map
- * @vma: The VMA which described the mapping
- *
- * There is no need to get a lock here unless we should be updating
- * atime. We ignore any locking errors since the only consequence is
- * a missed atime update (which will just be deferred until later).
- *
- * Returns: 0
- */
-
-static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
-
- if (!(file->f_flags & O_NOATIME)) {
- struct gfs2_holder i_gh;
- int error;
-
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
- error = gfs2_glock_nq(&i_gh);
- file_accessed(file);
- if (error == 0)
- gfs2_glock_dq_uninit(&i_gh);
- }
- vma->vm_ops = &gfs2_vm_ops;
- vma->vm_flags |= VM_CAN_NONLINEAR;
-
- return 0;
-}
-
-/**
- * gfs2_open - open a file
- * @inode: the inode to open
- * @file: the struct file for this opening
- *
- * Returns: errno
- */
-
-static int gfs2_open(struct inode *inode, struct file *file)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder i_gh;
- struct gfs2_file *fp;
- int error;
-
- fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL);
- if (!fp)
- return -ENOMEM;
-
- mutex_init(&fp->f_fl_mutex);
-
- gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
- file->private_data = fp;
-
- if (S_ISREG(ip->i_inode.i_mode)) {
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
- &i_gh);
- if (error)
- goto fail;
-
- if (!(file->f_flags & O_LARGEFILE) &&
- ip->i_disksize > MAX_NON_LFS) {
- error = -EOVERFLOW;
- goto fail_gunlock;
- }
-
- gfs2_glock_dq_uninit(&i_gh);
- }
-
- return 0;
-
-fail_gunlock:
- gfs2_glock_dq_uninit(&i_gh);
-fail:
- file->private_data = NULL;
- kfree(fp);
- return error;
-}
-
-/**
- * gfs2_close - called to close a struct file
- * @inode: the inode the struct file belongs to
- * @file: the struct file being closed
- *
- * Returns: errno
- */
-
-static int gfs2_close(struct inode *inode, struct file *file)
-{
- struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
- struct gfs2_file *fp;
-
- fp = file->private_data;
- file->private_data = NULL;
-
- if (gfs2_assert_warn(sdp, fp))
- return -EIO;
-
- kfree(fp);
-
- return 0;
-}
-
-/**
- * gfs2_fsync - sync the dirty data for a file (across the cluster)
- * @file: the file that points to the dentry (we ignore this)
- * @dentry: the dentry that points to the inode to sync
- *
- * The VFS will flush "normal" data for us. We only need to worry
- * about metadata here. For journaled data, we just do a log flush
- * as we can't avoid it. Otherwise we can just bale out if datasync
- * is set. For stuffed inodes we must flush the log in order to
- * ensure that all data is on disk.
- *
- * The call to write_inode_now() is there to write back metadata and
- * the inode itself. It does also try and write the data, but thats
- * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite()
- * for us.
- *
- * Returns: errno
- */
-
-static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
-{
- struct inode *inode = dentry->d_inode;
- int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC);
- int ret = 0;
-
- if (gfs2_is_jdata(GFS2_I(inode))) {
- gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
- return 0;
- }
-
- if (sync_state != 0) {
- if (!datasync)
- ret = write_inode_now(inode, 0);
-
- if (gfs2_is_stuffed(GFS2_I(inode)))
- gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
- }
-
- return ret;
-}
-
-#ifdef CONFIG_GFS2_FS_LOCKING_DLM
-
-/**
- * gfs2_setlease - acquire/release a file lease
- * @file: the file pointer
- * @arg: lease type
- * @fl: file lock
- *
- * We don't currently have a way to enforce a lease across the whole
- * cluster; until we do, disable leases (by just returning -EINVAL),
- * unless the administrator has requested purely local locking.
- *
- * Returns: errno
- */
-
-static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
-{
- return -EINVAL;
-}
-
-/**
- * gfs2_lock - acquire/release a posix lock on a file
- * @file: the file pointer
- * @cmd: either modify or retrieve lock state, possibly wait
- * @fl: type and range of lock
- *
- * Returns: errno
- */
-
-static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
-{
- struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
- struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
- struct lm_lockstruct *ls = &sdp->sd_lockstruct;
-
- if (!(fl->fl_flags & FL_POSIX))
- return -ENOLCK;
- if (__mandatory_lock(&ip->i_inode))
- return -ENOLCK;
-
- if (cmd == F_CANCELLK) {
- /* Hack: */
- cmd = F_SETLK;
- fl->fl_type = F_UNLCK;
- }
- if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
- return -EIO;
- if (IS_GETLK(cmd))
- return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl);
- else if (fl->fl_type == F_UNLCK)
- return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl);
- else
- return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl);
-}
-
-static int do_flock(struct file *file, int cmd, struct file_lock *fl)
-{
- struct gfs2_file *fp = file->private_data;
- struct gfs2_holder *fl_gh = &fp->f_fl_gh;
- struct gfs2_inode *ip = GFS2_I(file->f_path.dentry->d_inode);
- struct gfs2_glock *gl;
- unsigned int state;
- int flags;
- int error = 0;
-
- state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
- flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
-
- mutex_lock(&fp->f_fl_mutex);
-
- gl = fl_gh->gh_gl;
- if (gl) {
- if (fl_gh->gh_state == state)
- goto out;
- flock_lock_file_wait(file,
- &(struct file_lock){.fl_type = F_UNLCK});
- gfs2_glock_dq_wait(fl_gh);
- gfs2_holder_reinit(state, flags, fl_gh);
- } else {
- error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr,
- &gfs2_flock_glops, CREATE, &gl);
- if (error)
- goto out;
- gfs2_holder_init(gl, state, flags, fl_gh);
- gfs2_glock_put(gl);
- }
- error = gfs2_glock_nq(fl_gh);
- if (error) {
- gfs2_holder_uninit(fl_gh);
- if (error == GLR_TRYFAILED)
- error = -EAGAIN;
- } else {
- error = flock_lock_file_wait(file, fl);
- gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
- }
-
-out:
- mutex_unlock(&fp->f_fl_mutex);
- return error;
-}
-
-static void do_unflock(struct file *file, struct file_lock *fl)
-{
- struct gfs2_file *fp = file->private_data;
- struct gfs2_holder *fl_gh = &fp->f_fl_gh;
-
- mutex_lock(&fp->f_fl_mutex);
- flock_lock_file_wait(file, fl);
- if (fl_gh->gh_gl)
- gfs2_glock_dq_uninit(fl_gh);
- mutex_unlock(&fp->f_fl_mutex);
-}
-
-/**
- * gfs2_flock - acquire/release a flock lock on a file
- * @file: the file pointer
- * @cmd: either modify or retrieve lock state, possibly wait
- * @fl: type and range of lock
- *
- * Returns: errno
- */
-
-static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
-{
- struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
-
- if (!(fl->fl_flags & FL_FLOCK))
- return -ENOLCK;
- if (__mandatory_lock(&ip->i_inode))
- return -ENOLCK;
-
- if (fl->fl_type == F_UNLCK) {
- do_unflock(file, fl);
- return 0;
- } else {
- return do_flock(file, cmd, fl);
- }
-}
-
-const struct file_operations gfs2_file_fops = {
- .llseek = gfs2_llseek,
- .read = do_sync_read,
- .aio_read = generic_file_aio_read,
- .write = do_sync_write,
- .aio_write = generic_file_aio_write,
- .unlocked_ioctl = gfs2_ioctl,
- .mmap = gfs2_mmap,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
- .lock = gfs2_lock,
- .flock = gfs2_flock,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .setlease = gfs2_setlease,
-};
-
-const struct file_operations gfs2_dir_fops = {
- .readdir = gfs2_readdir,
- .unlocked_ioctl = gfs2_ioctl,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
- .lock = gfs2_lock,
- .flock = gfs2_flock,
-};
-
-#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
-
-const struct file_operations gfs2_file_fops_nolock = {
- .llseek = gfs2_llseek,
- .read = do_sync_read,
- .aio_read = generic_file_aio_read,
- .write = do_sync_write,
- .aio_write = generic_file_aio_write,
- .unlocked_ioctl = gfs2_ioctl,
- .mmap = gfs2_mmap,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
- .splice_read = generic_file_splice_read,
- .splice_write = generic_file_splice_write,
- .setlease = generic_setlease,
-};
-
-const struct file_operations gfs2_dir_fops_nolock = {
- .readdir = gfs2_readdir,
- .unlocked_ioctl = gfs2_ioctl,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
-};
-