Commit 2b78f9a0 authored Oct 24, 2011 by Allan Stephens Committed by Paul Gortmaker Dec 27, 2011

tipc: Handle broadcast attempt when no neighboring nodes exist

Adds a check to detect when an attempt is made to send a message
via the broadcast link and no neighboring nodes are currently available
to receive it. Rather than wasting effort passing the message to the
broadcast link and broadcast bearer, who will only throw it away,
TIPC now frees the message immediately and reports success (i.e. the
message has been delivered to all available destinations).

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

parent cd3decdf

net/tipc/bcast.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -417,13 +417,19 @@ int tipc_bclink_send_msg(struct sk_buff *buf)

		spin_lock_bh(&bc_lock);

		if (!bclink->bcast_nodes.count) {
		res = msg_data_sz(buf_msg(buf));
		buf_discard(buf);
		goto exit;
		}

		res = tipc_link_send_buf(bcl, buf);
		if (likely(res > 0))
		bclink_set_last_sent();

		bcl->stats.queue_sz_counts++;
		bcl->stats.accu_queue_sz += bcl->out_queue_size;

		exit:
		spin_unlock_bh(&bc_lock);
		return res;
		}

Admin message