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tipc: fix a link reset issue due to retransmission failures 

When a node joins a cluster while we are transmitting a fragment
stream over the broadcast link, it's missing the preceding fragments
needed to build a meaningful message. As a result, the node has to
drop it. However, as the fragment message is not acknowledged to
its sender before it's dropped, it accidentally causes link reset
of retransmission failure on the node.

Reported-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2015-03-25 18:09:40 +08:00 committed by David S. Miller
parent 358e048d67
commit bc14b8d6a9
1 changed files with 5 additions and 3 deletions
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8
net/tipc/bcast.c
View File

@ -523,11 +523,13 @@ receive:
tipc_bclink_unlock(net);
tipc_node_unlock(node);
} else if (msg_user(msg) == MSG_FRAGMENTER) {
tipc_buf_append(&node->bclink.reasm_buf, &buf);
if (unlikely(!buf && !node->bclink.reasm_buf))
goto unlock;
tipc_bclink_lock(net);
bclink_accept_pkt(node, seqno);
tipc_buf_append(&node->bclink.reasm_buf, &buf);
if (unlikely(!buf && !node->bclink.reasm_buf)) {
tipc_bclink_unlock(net);
goto unlock;
}
bcl->stats.recv_fragments++;
if (buf) {
bcl->stats.recv_fragmented++;