[Linux-cluster] [PATCH] dumping the unknown address when got a connect from non cluster node

[Masatake YAMATO]

Another patch useful for debugging cluster.conf and network configuration.

This is useful when you build a cluster with nodes connected each others with
a software bridge(virbrN). If you install wrong iptabels configuration, dlm
cannot establish connections. You will just see 

       dlm: connect from non cluster node

in demsg. It is difficult to understand what happens quickly.
This patch dumps the address of the non cluster node.


Signed-off-by: Masatake YAMATO <yamato at redhat.com>

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index bffa1e7..90c1c2e 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -748,7 +748,12 @@ static int tcp_accept_from_sock(struct connection *con)
 	/* Get the new node's NODEID */
 	make_sockaddr(&peeraddr, 0, &len);
 	if (dlm_addr_to_nodeid(&peeraddr, &nodeid)) {
+		int i;
+		unsigned char *b=(unsigned char *)&peeraddr;
 		log_print("connect from non cluster node");
+		for (i=0; i<sizeof(struct sockaddr_storage);i++)
+			printk("%02x ", b[i]);
+		printk("\n");
 		sock_release(newsock);
 		mutex_unlock(&con->sock_mutex);
 		return -1;