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, 2 insertions, 2 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 7a1d1ce22e66..8f4158d7c9a6 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -328,7 +328,7 @@ static inline struct sock *__udp4_lib_lookup_skb(struct sk_buff *skb,
         if (unlikely(sk = skb_steal_sock(skb)))
                 return sk;
         else
-                return __udp4_lib_lookup(dev_net(skb->dst->dev), iph->saddr, sport,
+                return __udp4_lib_lookup(dev_net(skb_dst(skb)->dev), iph->saddr, sport,
                                          iph->daddr, dport, inet_iif(skb),
                                          udptable);
 }
@@ -1237,7 +1237,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
         struct sock *sk;
         struct udphdr *uh;
         unsigned short ulen;
-        struct rtable *rt = (struct rtable*)skb->dst;
+        struct rtable *rt = skb_rtable(skb);
         __be32 saddr, daddr;
         struct net *net = dev_net(skb->dev);