gfs2: nfs lock support for gfs2

Add NFS lock support to GFS2.

Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 48b248d7c823..329c4dcdecdb 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -520,6 +520,11 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
                 }
         }
 
+        if (cmd == F_CANCELLK) {
+                /* Hack: */
+                cmd = F_SETLK;
+                fl->fl_type = F_UNLCK;
+        }
         if (IS_GETLK(cmd))
                 return gfs2_lm_plock_get(sdp, &name, file, fl);
         else if (fl->fl_type == F_UNLCK)