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>
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;
}