commit adf30907d63893e4208dfe3f5c88ae12bc2f25d5
author Eric Dumazet <eric.dumazet@gmail.com> Tue Jun 02 05:19:30 2009 +0000
committer David S. Miller <davem@davemloft.net> Wed Jun 03 02:51:04 2009 -0700
tree 0f07542bb95de2ad537540868aba6cf87a86e17d
parent 511c3f92ad5b6d9f8f6464be1b4f85f0422be91a

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>

net/ipv6/netfilter.c

diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 834cea6..d5ed92b 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -12,7 +12,7 @@
 
 int ip6_route_me_harder(struct sk_buff *skb)
 {
-	struct net *net = dev_net(skb->dst->dev);
+	struct net *net = dev_net(skb_dst(skb)->dev);
 	struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct dst_entry *dst;
 	struct flowi fl = {
@@ -28,9 +28,15 @@
 
 #ifdef CONFIG_XFRM
 	if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
-	    xfrm_decode_session(skb, &fl, AF_INET6) == 0)
-		if (xfrm_lookup(net, &skb->dst, &fl, skb->sk, 0))
+	    xfrm_decode_session(skb, &fl, AF_INET6) == 0) {
+		struct dst_entry *dst2 = skb_dst(skb);
+
+		if (xfrm_lookup(net, &dst2, &fl, skb->sk, 0)) {
+			skb_dst_set(skb, NULL);
 			return -1;
+		}
+		skb_dst_set(skb, dst2);
+	}
 #endif
 
 	if (dst->error) {
@@ -41,9 +47,9 @@
 	}
 
 	/* Drop old route. */
-	dst_release(skb->dst);
+	skb_dst_drop(skb);
 
-	skb->dst = dst;
+	skb_dst_set(skb, dst);
 	return 0;
 }
 EXPORT_SYMBOL(ip6_route_me_harder);