Commit 0340d0b9 authored Apr 05, 2016 by Tom Herbert Committed by David S. Miller Apr 07, 2016

net: Checks skb_dst to be NULL in inet_iif



In inet_iif check if skb_rtable is NULL for the skb and return
skb->skb_iif if it is.

This change allows inet_iif to be called before the dst
information has been set in the skb (e.g. when doing socket based
UDP GRO).

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 1fbbe1a8

include/net/route.h

+4 −3

Original line number	Diff line number	Diff line
		@@ -322,10 +322,11 @@ static inline struct rtable ip_route_newports(struct flowi4 fl4, struct rtable

		static inline int inet_iif(const struct sk_buff *skb)
		{
		int iif = skb_rtable(skb)->rt_iif;
		struct rtable *rt = skb_rtable(skb);

		if (rt && rt->rt_iif)
		return rt->rt_iif;

		if (iif)
		return iif;
		return skb->skb_iif;
		}