NFS: File unlock needs to be a metadata synchronisation point

File unlock needs to update both data and metadata on the NFS server
in order to act as a synchronisation point for other clients.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index e679d24..6959cb7 100644 (file)
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -780,7 +780,7 @@ do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
         * Flush all pending writes before doing anything
         * with locks..
         */
-       nfs_sync_mapping(filp->f_mapping);
+       vfs_fsync(filp, 0);
 
        l_ctx = nfs_get_lock_context(nfs_file_open_context(filp));
        if (!IS_ERR(l_ctx)) {