Merge branches 'for-4.4/upstream-fixes', 'for-4.5/async-suspend', 'for-4.5/container...

[mirror_ubuntu-artful-kernel.git] / include / net / inet_sock.h

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index f5bf7310e3343468bddf7e51940a77ed497ad7f1..2134e6d815bcb0611a2f65cd7b4da44cb7762b8c 100644 (file)
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -210,6 +210,18 @@ struct inet_sock {
 #define IP_CMSG_ORIGDSTADDR    BIT(6)
 #define IP_CMSG_CHECKSUM       BIT(7)
 
+/* SYNACK messages might be attached to request sockets.
+ * Some places want to reach the listener in this case.
+ */
+static inline struct sock *skb_to_full_sk(const struct sk_buff *skb)
+{
+       struct sock *sk = skb->sk;
+
+       if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
+               sk = inet_reqsk(sk)->rsk_listener;
+       return sk;
+}
+
 static inline struct inet_sock *inet_sk(const struct sock *sk)
 {
        return (struct inet_sock *)sk;