From b57ae01a8a8446dbbed7365c9b05aef1fc6dea20 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Fri, 6 May 2011 16:24:06 -0700
Subject: [PATCH] ipv4: Use cork flow in ip_queue_xmit()
All invokers of ip_queue_xmit() must make certain that the
socket is locked. All of SCTP, TCP, DCCP, and L2TP now make
sure this is the case.
Therefore we can use the cork flow during output route lookup in
ip_queue_xmit() when the socket route check fails.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/ip_output.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 0a2f49a442e8..4ba26d4040ed 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -317,6 +317,7 @@ int ip_queue_xmit(struct sk_buff *skb)
struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ip_options_rcu *inet_opt;
+ struct flowi4 *fl4;
struct rtable *rt;
struct iphdr *iph;
int res;
@@ -331,9 +332,9 @@ int ip_queue_xmit(struct sk_buff *skb)
goto packet_routed;
/* Make sure we can route this packet. */
+ fl4 = &inet->cork.fl.u.ip4;
rt = (struct rtable *)__sk_dst_check(sk, 0);
if (rt == NULL) {
- struct flowi4 fl4;
__be32 daddr;
/* Use correct destination address if we have options. */
@@ -345,7 +346,7 @@ int ip_queue_xmit(struct sk_buff *skb)
* keep trying until route appears or the connection times
* itself out.
*/
- rt = ip_route_output_ports(sock_net(sk), &fl4, sk,
+ rt = ip_route_output_ports(sock_net(sk), fl4, sk,
daddr, inet->inet_saddr,
inet->inet_dport,
inet->inet_sport,
--
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