ocfs2: dlm_request_all_locks() should deal with the status sent from target node

dlm_request_all_locks() should deal with the status sent from target node if DLM_LOCK_REQUEST_MSG is sent successfully, or recovery master will fall into endless loop, waiting for other nodes to send locks and DLM_RECO_DATA_DONE_MSG to me.

NodeA NodeB
selected as recovery master dlm_remaster_locks() ->dlm_request_all_locks() send DLM_LOCK_REQUEST_MSG to nodeA

It happened that NodeA cannot alloc
memory when it processes this message.
dlm_request_all_locks_handler() do
not queue dlm_request_all_locks_worker
and returns -ENOMEM. It will never
send locks andDLM_RECO_DATA_DONE_MSG
to NodeB.

NodeB do not deal with the status sent from nodeA, and will fall in endless loop waiting for the recovery state of NodeA to be changed.

---
 fs/ocfs2/dlm/dlmrecovery.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

index 773bd32..f945502 100644
@@ -787,6 +787,7 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
 {
 	struct dlm_lock_request lr;
 	int ret;
+	int status;
 
 	mlog(0, "\n");
 

@@ -800,13 +801,15 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
 
 	// send message
 	ret = o2net_send_message(DLM_LOCK_REQUEST_MSG, dlm->key,
-				 &lr, sizeof(lr), request_from, NULL);
+				 &lr, sizeof(lr), request_from, &status);
 
 	/* negative status is handled by caller */
 	if (ret < 0)
 		mlog(ML_ERROR, "%s: Error %d send LOCK_REQUEST to node %u "
 		     "to recover dead node %u\n", dlm->name, ret,
 		     request_from, dead_node);
+	else
+		ret = status;
 	// return from here, then
 	// sleep until all received or error
 	return ret;

1.7.9.7