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tipc: Handle broadcast attempt when no neighboring nodes exist

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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>
This commit is contained in:
Allan Stephens 2011-10-24 13:05:55 -04:00 committed by Paul Gortmaker
parent cd3decdfd1
commit 2b78f9a002
1 changed files with 7 additions and 1 deletions
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8
net/tipc/bcast.c
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@ -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;
}