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, 4 insertions, 2 deletions

diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index bccb3887773e..a5e3a593e472 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1075,6 +1075,7 @@ static int dn_accept(struct socket *sock, struct socket *newsock, int flags)
         int err = 0;
         unsigned char type;
         long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+        struct dst_entry *dst;
 
         lock_sock(sk);
 
@@ -1102,8 +1103,9 @@ static int dn_accept(struct socket *sock, struct socket *newsock, int flags)
         }
         release_sock(sk);
 
-        dst_release(xchg(&newsk->sk_dst_cache, skb->dst));
-        skb->dst = NULL;
+        dst = skb_dst(skb);
+        dst_release(xchg(&newsk->sk_dst_cache, dst));
+        skb_dst_set(skb, NULL);
 
         DN_SK(newsk)->state        = DN_CR;
         DN_SK(newsk)->addrrem      = cb->src_port;