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Btrfs: early fsync support

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-04-19 21:01:03 -04:00
committed by David Woodhouse
parent 7e38180e20
commit 8fd17795b2
7 changed files with 62 additions and 5 deletions
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37
fs/btrfs/super.c
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@@ -11,6 +11,7 @@
#include <linux/mpage.h>
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/statfs.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
@@ -932,6 +933,26 @@ out_unlock:
return err;
}
static int btrfs_sync_file(struct file *file,
struct dentry *dentry, int datasync)
{
struct inode *inode = dentry->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;
struct btrfs_trans_handle *trans;
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
if (!trans) {
ret = -ENOMEM;
goto out;
}
ret = btrfs_commit_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
out:
return ret > 0 ? EIO : ret;
}
static int btrfs_sync_fs(struct super_block *sb, int wait)
{
struct btrfs_trans_handle *trans;
@@ -2353,6 +2374,19 @@ static int btrfs_getattr(struct vfsmount *mnt,
return 0;
}
static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct btrfs_root *root = btrfs_sb(dentry->d_sb);
struct btrfs_super_block *disk_super = root->fs_info->disk_super;
buf->f_namelen = BTRFS_NAME_LEN;
buf->f_blocks = btrfs_super_total_blocks(disk_super);
buf->f_bfree = buf->f_blocks - btrfs_super_blocks_used(disk_super);
buf->f_bavail = buf->f_bfree;
buf->f_bsize = dentry->d_sb->s_blocksize;
buf->f_type = BTRFS_SUPER_MAGIC;
return 0;
}
static struct file_system_type btrfs_fs_type = {
.owner = THIS_MODULE,
.name = "btrfs",
@@ -2362,7 +2396,6 @@ static struct file_system_type btrfs_fs_type = {
};
static struct super_operations btrfs_super_ops = {
.statfs = simple_statfs,
.delete_inode = btrfs_delete_inode,
.put_super = btrfs_put_super,
.read_inode = btrfs_read_locked_inode,
@@ -2371,6 +2404,7 @@ static struct super_operations btrfs_super_ops = {
.write_inode = btrfs_write_inode,
.alloc_inode = btrfs_alloc_inode,
.destroy_inode = btrfs_destroy_inode,
.statfs = btrfs_statfs,
};
static struct inode_operations btrfs_dir_inode_operations = {
@@ -2413,6 +2447,7 @@ static struct file_operations btrfs_file_operations = {
.mmap = generic_file_mmap,
.open = generic_file_open,
.ioctl = btrfs_ioctl,
.fsync = btrfs_sync_file,
};
static int __init init_btrfs_fs(void)