ocfs2: recheck lockres master before sending an unlock request.

Recovery may have happened and it may now be mastered locally.

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
index ac89c509daf9..9b40d60e3b49 100644
--- a/fs/ocfs2/dlm/dlmunlock.c
+++ b/fs/ocfs2/dlm/dlmunlock.c
@@ -317,6 +317,16 @@ static enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm,
         size_t veclen = 1;
 
         mlog_entry("%.*s\n", res->lockname.len, res->lockname.name);
+                        
+        if (owner == dlm->node_num) {
+                /* ended up trying to contact ourself.  this means
+                 * that the lockres had been remote but became local
+                 * via a migration.  just retry it, now as local */
+                mlog(0, "%s:%.*s: this node became the master due to a "
+                     "migration, re-evaluate now\n", dlm->name,
+                     res->lockname.len, res->lockname.name);
+                return DLM_FORWARD;
+        }
 
         memset(&unlock, 0, sizeof(unlock));
         unlock.node_idx = dlm->node_num;