net: skb->dst accessors

Define three accessors to get/set dst attached to a skb

struct dst_entry *skb_dst(const struct sk_buff *skb)

void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)

void skb_dst_drop(struct sk_buff *skb)
This one should replace occurrences of :
dst_release(skb->dst)
skb->dst = NULL;

Delete skb->dst field

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 4 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 8905712cfbb8..fc333d854728 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -177,10 +177,9 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
 
         if (unlikely(sk = skb_steal_sock(skb)))
                 return sk;
-        else
-                return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
-                                         &iph->daddr, dport, inet6_iif(skb),
-                                         udptable);
+        return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport,
+                                 &iph->daddr, dport, inet6_iif(skb),
+                                 udptable);
 }
 
 /*