Merge branch 'lwtunnel-encap-local'

Robert Shearman says:

====================
lwtunnel: encap locally-generated ipv4 packets

Locally-generated IPv4 packets, such as from applications running on
the host or traceroute/ping currently don't have lwtunnel output
redirected encap applied. However, they should do in the same way as
for forwarded packets and this patch series addresses that.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/lwtunnel.c

@@ -215,8 +215,12 @@ int lwtunnel_output6(struct sock *sk, struct sk_buff *skb)
 	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
 	struct lwtunnel_state *lwtstate = NULL;
 
-	if (rt)
+	if (rt) {
 		lwtstate = rt->rt6i_lwtstate;
+		skb->dev = rt->dst.dev;
+	}
+
+	skb->protocol = htons(ETH_P_IPV6);
 
 	return __lwtunnel_output(sk, skb, lwtstate);
 }
@@ -227,8 +231,12 @@ int lwtunnel_output(struct sock *sk, struct sk_buff *skb)
 	struct rtable *rt = (struct rtable *)skb_dst(skb);
 	struct lwtunnel_state *lwtstate = NULL;
 
-	if (rt)
+	if (rt) {
 		lwtstate = rt->rt_lwtstate;
+		skb->dev = rt->dst.dev;
+	}
+
+	skb->protocol = htons(ETH_P_IP);
 
 	return __lwtunnel_output(sk, skb, lwtstate);
 }

net/ipv4/route.c

@@ -2022,6 +2022,8 @@ add:
 	}
 
 	rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0);
+	if (lwtunnel_output_redirect(rth->rt_lwtstate))
+		rth->dst.output = lwtunnel_output;
 
 	return rth;
 }