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-rw-r--r--fs/dlm/lowcomms.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 754fd6c0b747..bc04f5e3af7a 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -535,7 +535,9 @@ static void close_connection(struct connection *con, bool and_other)
mutex_unlock(&con->sock_mutex);
}
-/* We only send shutdown messages to nodes that are not part of the cluster */
+/* We only send shutdown messages to nodes that are not part of the cluster
+ * or if we get multiple connections from a node.
+ */
static void sctp_send_shutdown(sctp_assoc_t associd)
{
static char outcmsg[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
@@ -718,6 +720,14 @@ static void process_sctp_notification(struct connection *con,
if (!new_con)
return;
+ if (new_con->sock) {
+ log_print("reject connect from node %d: "
+ "already has a connection.",
+ nodeid);
+ sctp_send_shutdown(prim.ssp_assoc_id);
+ return;
+ }
+
/* Peel off a new sock */
lock_sock(con->sock->sk);
ret = sctp_do_peeloff(con->sock->sk,