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Date: Tue, 27 Dec 2011 12:39:38 -0500 From: Paul Gortmaker <paul.gortmaker@...driver.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, allan.stephens@...driver.com, ying.xue@...driver.com, Paul Gortmaker <paul.gortmaker@...driver.com> Subject: [PATCH net-next 19/23] tipc: Handle broadcast attempt when no neighboring nodes exist From: Allan Stephens <allan.stephens@...driver.com> 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@...driver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com> --- net/tipc/bcast.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 5ca8fdd..8f58df2 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -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; } -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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