net: ipv6: fix TCP early demux

IPv6 needs a cookie in dst_check() call.

We need to add rx_dst_cookie and provide a family independent
sk_rx_dst_set(sk, skb) method to properly support IPv6 TCP early demux.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 1 insertions, 9 deletions

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 5ee66f517b4f..ba1d3615acbb 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -39,6 +39,7 @@ struct inet_connection_sock_af_ops {
         int         (*queue_xmit)(struct sk_buff *skb, struct flowi *fl);
         void        (*send_check)(struct sock *sk, struct sk_buff *skb);
         int         (*rebuild_header)(struct sock *sk);
+        void        (*sk_rx_dst_set)(struct sock *sk, const struct sk_buff *skb);
         int         (*conn_request)(struct sock *sk, struct sk_buff *skb);
         struct sock *(*syn_recv_sock)(struct sock *sk, struct sk_buff *skb,
                                       struct request_sock *req,
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 83b567fe1941..613cfa401672 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -249,13 +249,4 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
         return flags;
 }
 
-static inline void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb)
-{
-        struct dst_entry *dst = skb_dst(skb);
-
-        dst_hold(dst);
-        sk->sk_rx_dst = dst;
-        inet_sk(sk)->rx_dst_ifindex = skb->skb_iif;
-}
-
 #endif  /* _INET_SOCK_H */