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tipc: handle broadcast NAME_DISTRIBUTOR packet when receiving it 

NAME_DISTRIBUTOR messages are transmitted through unicast link on TIPC
2.0, by contrast, the messages are delivered through broadcast link on
TIPC 1.7. But at present, NAME_DISTRIBUTOR messages received by
broadcast link cannot be handled in tipc_rcv() until an unicast message
arrives, which may lead to a significant delay to update name table.

To avoid this delay, we will also deal with broadcast NAME_DISTRIBUTOR
message on broadcast receive path.

Signed-off-by: Zhenbo Gao <zhenbo.gao@windriver.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhenbo Gao 2018-12-18 17:43:52 +08:00 committed by David S. Miller
parent 935b8a59ac
commit 5679ee784c
1 changed files with 4 additions and 0 deletions
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4
net/tipc/node.c
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@ -1549,6 +1549,10 @@ static void tipc_node_bc_rcv(struct net *net, struct sk_buff *skb, int bearer_id
if (!skb_queue_empty(&be->inputq1))
tipc_node_mcast_rcv(n);
/* Handle NAME_DISTRIBUTOR messages sent from 1.7 nodes */
if (!skb_queue_empty(&n->bc_entry.namedq))
tipc_named_rcv(net, &n->bc_entry.namedq);
/* If reassembly or retransmission failure => reset all links to peer */
if (rc & TIPC_LINK_DOWN_EVT)
tipc_node_reset_links(n);