tipc: add new function for sending multiple small messages

We see an increasing need to send multiple single-buffer messages
of TIPC_SYSTEM_IMPORTANCE to different individual destination nodes.
Instead of looping over the send queue and sending each buffer
individually, as we do now, we add a new help function
tipc_node_distr_xmit() to do this.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 0 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 6cc1ae600820..89f8ac73bf65 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1254,6 +1254,22 @@ int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode,
         return 0;
 }
 
+/* tipc_node_distr_xmit(): send single buffer msgs to individual destinations
+ * Note: this is only for SYSTEM_IMPORTANCE messages, which cannot be rejected
+ */
+int tipc_node_distr_xmit(struct net *net, struct sk_buff_head *xmitq)
+{
+        struct sk_buff *skb;
+        u32 selector, dnode;
+
+        while ((skb = __skb_dequeue(xmitq))) {
+                selector = msg_origport(buf_msg(skb));
+                dnode = msg_destnode(buf_msg(skb));
+                tipc_node_xmit_skb(net, skb, dnode, selector);
+        }
+        return 0;
+}
+
 void tipc_node_broadcast(struct net *net, struct sk_buff *skb)
 {
         struct sk_buff *txskb;