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>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ea37741..53b6a41 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -981,9 +981,10 @@
struct tcphdr *th = tcp_hdr(skb), *t1;
struct sk_buff *buff;
struct flowi fl;
- struct net *net = dev_net(skb->dst->dev);
+ struct net *net = dev_net(skb_dst(skb)->dev);
struct sock *ctl_sk = net->ipv6.tcp_sk;
unsigned int tot_len = sizeof(struct tcphdr);
+ struct dst_entry *dst;
__be32 *topt;
if (ts)
@@ -1052,8 +1053,9 @@
* Underlying function will use this to retrieve the network
* namespace
*/
- if (!ip6_dst_lookup(ctl_sk, &buff->dst, &fl)) {
- if (xfrm_lookup(net, &buff->dst, &fl, NULL, 0) >= 0) {
+ if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) {
+ if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) {
+ skb_dst_set(buff, dst);
ip6_xmit(ctl_sk, buff, &fl, NULL, 0);
TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
if (rst)