[DLM] Fix lowcomms socket closing

This patch fixes the slight mess made in lowcomms closing by previous patches
and fixes all sorts of DLM hangs.

Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 9e9d2e8..62a8a6c 100644 (file)
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -334,18 +334,8 @@ static void close_connection(struct connection *con, bool and_other)
                con->rx_page = NULL;
        }
 
-       /* If we are an 'othercon' then NULL the pointer to us
-          from the parent and tidy ourself up */
-       if (test_bit(CF_IS_OTHERCON, &con->flags)) {
-               struct connection *parent = __nodeid2con(con->nodeid, 0);
-               parent->othercon = NULL;
-               kmem_cache_free(con_cache, con);
-       }
-       else {
-               /* Parent connections get reused */
-               con->retries = 0;
-               mutex_unlock(&con->sock_mutex);
-       }
+       con->retries = 0;
+       mutex_unlock(&con->sock_mutex);
 }
 
 /* We only send shutdown messages to nodes that are not part of the cluster */
@@ -731,6 +721,8 @@ static int tcp_accept_from_sock(struct connection *con)
                        INIT_WORK(&othercon->swork, process_send_sockets);
                        INIT_WORK(&othercon->rwork, process_recv_sockets);
                        set_bit(CF_IS_OTHERCON, &othercon->flags);
+               }
+               if (!othercon->sock) {
                        newcon->othercon = othercon;
                        othercon->sock = newsock;
                        newsock->sk->sk_user_data = othercon;