From: Roopa Prabhu <roopa@cumulusnetworks.com>
Date: Tue, 21 Jul 2015 08:43:50 +0000 (+0200)
Subject: ipv4: redirect dst output to lwtunnel output
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8602a625024737602630fe0dee423b3096d31524;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ipv4: redirect dst output to lwtunnel output

For input routes with tunnel encap state this patch redirects
dst output functions to lwtunnel_output which later resolves to
the corresponding lwtunnel output function.

This has been tested to work with mpls ip tunnels.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 226570ba1ced..cd3157c464e6 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1633,6 +1633,8 @@ static int __mkroute_input(struct sk_buff *skb,
 	rth->dst.output = ip_output;
 
 	rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag);
+	if (lwtunnel_output_redirect(rth->rt_lwtstate))
+		rth->dst.output = lwtunnel_output;
 	skb_dst_set(skb, &rth->dst);
 out:
 	err = 0;