dlm: keep listening connection alive with sctp mode

Lidong Zhong · teigland · commit 883854c5457a · 2014-06-12T10:26:14.000-05:00
The connection struct with nodeid 0 is the listening socket,
not a connection to another node.  The sctp resend function
was not checking that the nodeid was valid (non-zero), so it
would mistakenly get and resend on the listening connection
when nodeid was zero.

Signed-off-by: Lidong Zhong &lt;lzhong@suse.com&gt;
Signed-off-by: David Teigland &lt;teigland@redhat.com&gt;
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
@@ -617,6 +617,11 @@ static void retry_failed_sctp_send(struct connection *recv_con,
 	int nodeid = sn_send_failed->ssf_info.sinfo_ppid;
 
 	log_print("Retry sending %d bytes to node id %d", len, nodeid);
+	
+	if (!nodeid) {
+		log_print("Shouldn't resend data via listening connection.");
+		return;
+	}
 
 	con = nodeid2con(nodeid, 0);
 	if (!con) {
