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authorJon Paul Maloy <jon.maloy@ericsson.com>2017-01-18 13:50:52 -0500
committerDavid S. Miller <davem@davemloft.net>2017-01-20 12:10:17 -0500
commita853e4c6d0843729e1f25a7a7beff168e1dd7420 (patch)
tree3725ef60bc42bf5c06873fd2962f37bb2ecf0ba1 /net/tipc/msg.c
parenttipc: add functionality to lookup multicast destination nodes (diff)
downloadlinux-dev-a853e4c6d0843729e1f25a7a7beff168e1dd7420.tar.xz
linux-dev-a853e4c6d0843729e1f25a7a7beff168e1dd7420.zip
tipc: introduce replicast as transport option for multicast
TIPC multicast messages are currently carried over a reliable 'broadcast link', making use of the underlying media's ability to transport packets as L2 broadcast or IP multicast to all nodes in the cluster. When the used bearer is lacking that ability, we can instead emulate the broadcast service by replicating and sending the packets over as many unicast links as needed to reach all identified destinations. We now introduce a new TIPC link-level 'replicast' service that does this. Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/msg.c')
-rw-r--r--net/tipc/msg.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index ab02d0742476..312ef7de57d7 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -607,6 +607,23 @@ error:
return false;
}
+bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
+ struct sk_buff_head *cpy)
+{
+ struct sk_buff *skb, *_skb;
+
+ skb_queue_walk(msg, skb) {
+ _skb = pskb_copy(skb, GFP_ATOMIC);
+ if (!_skb) {
+ __skb_queue_purge(cpy);
+ return false;
+ }
+ msg_set_destnode(buf_msg(_skb), dst);
+ __skb_queue_tail(cpy, _skb);
+ }
+ return true;
+}
+
/* tipc_skb_queue_sorted(); sort pkt into list according to sequence number
* @list: list to be appended to
* @seqno: sequence number of buffer to add