From 02c24a82187d5a628c68edfe71ae60dc135cd178 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Sat, 16 Jul 2011 20:44:56 -0400 Subject: 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 Signed-off-by: Josef Bacik Signed-off-by: Al Viro --- fs/xfs/linux-2.6/xfs_file.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) (limited to 'fs/xfs/linux-2.6/xfs_file.c') diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 7f782af286bf..fbbf657df0cd 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -127,6 +127,8 @@ xfs_iozero( STATIC int xfs_file_fsync( struct file *file, + loff_t start, + loff_t end, int datasync) { struct inode *inode = file->f_mapping->host; @@ -138,6 +140,10 @@ xfs_file_fsync( trace_xfs_file_fsync(ip); + error = filemap_write_and_wait_range(inode->i_mapping, start, end); + if (error) + return error; + if (XFS_FORCED_SHUTDOWN(mp)) return -XFS_ERROR(EIO); @@ -875,18 +881,11 @@ xfs_file_aio_write( /* Handle various SYNC-type writes */ if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) { loff_t end = pos + ret - 1; - int error, error2; xfs_rw_iunlock(ip, iolock); - error = filemap_write_and_wait_range(mapping, pos, end); + ret = -xfs_file_fsync(file, pos, end, + (file->f_flags & __O_SYNC) ? 0 : 1); xfs_rw_ilock(ip, iolock); - - error2 = -xfs_file_fsync(file, - (file->f_flags & __O_SYNC) ? 0 : 1); - if (error) - ret = error; - else if (error2) - ret = error2; } out_unlock: -- cgit v1.2.3-59-g8ed1b