[PATCH 12/17] ocfs2: Update syncing after splicing to match generic version

Jan Kara
2009-08-21T17:27:15Z

Update ocfs2 specific splicing code to use generic syncing helper. The sync now
does not happen under rw_lock because generic_write_sync() acquires i_mutex
which ranks above rw_lock. That should not matter because standard fsync path
does not hold it either.

CC: Joel Becker <Joel.Becker@oracle.com>
CC: ocfs2-devel@oss.oracle.com
Signed-off-by: Jan Kara <jack@suse.cz>
---
fs/ocfs2/file.c | 27 ++++++---------------------
1 files changed, 6 insertions(+), 21 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 1c71f0a..bd7fdf8 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1990,31 +1990,16 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,

if (ret > 0) {
unsigned long nr_pages;
+ int err;

- *ppos += ret;
nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;

- /*
- * If file or inode is SYNC and we actually wrote some data,
- * sync it.
- */
- if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
- int err;
-
- mutex_lock(&inode->i_mutex);
- err = ocfs2_rw_lock(inode, 1);
- if (err < 0) {
- mlog_errno(err);
- } else {
- err = generic_osync_inode(inode, mapping,
- OSYNC_METADATA|OSYNC_DATA);
- ocfs2_rw_unlock(inode, 1);
- }
- mutex_unlock(&inode->i_mutex);
+ err = generic_write_sync(out, *ppos, ret);
+ if (err)
+ ret = err;
+ else
+ *ppos += ret;

- if (err)
- ret = err;
- }
balance_dirty_pages_ratelimited_nr(mapping, nr_pages);
}

--
1.6.0.2