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authorJosef Bacik <josef@redhat.com>2011-07-17 02:44:56 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-21 02:47:59 +0200
commit02c24a82187d5a628c68edfe71ae60dc135cd178 (patch)
treec8dbaba4d82e2b20ed4335910a564a1f7d90fcf6 /fs/affs
parentdrivers: fix up various ->llseek() implementations (diff)
downloadlinux-02c24a82187d5a628c68edfe71ae60dc135cd178.tar.xz
linux-02c24a82187d5a628c68edfe71ae60dc135cd178.zip
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/affs')
-rw-r--r--fs/affs/affs.h2
-rw-r--r--fs/affs/file.c8
2 files changed, 8 insertions, 2 deletions
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 0e95f73a7023..c2b9c79eb64e 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -182,7 +182,7 @@ extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dent
void affs_free_prealloc(struct inode *inode);
extern void affs_truncate(struct inode *);
-int affs_file_fsync(struct file *, int);
+int affs_file_fsync(struct file *, loff_t, loff_t, int);
/* dir.c */
diff --git a/fs/affs/file.c b/fs/affs/file.c
index acf321b70fcd..2f4c935cb327 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -923,14 +923,20 @@ affs_truncate(struct inode *inode)
affs_free_prealloc(inode);
}
-int affs_file_fsync(struct file *filp, int datasync)
+int affs_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
{
struct inode *inode = filp->f_mapping->host;
int ret, err;
+ err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (err)
+ return err;
+
+ mutex_lock(&inode->i_mutex);
ret = write_inode_now(inode, 0);
err = sync_blockdev(inode->i_sb->s_bdev);
if (!ret)
ret = err;
+ mutex_unlock(&inode->i_mutex);
return ret;
}