net: Allow accepted sockets to be bound to l3mdev domain

[deliverable/linux.git] / include / net / inet_sock.h

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 2134e6d815bcb0611a2f65cd7b4da44cb7762b8c..012b1f91f3ec4e3b018fb1b900692342eaefe108 100644 (file)
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -28,6 +28,7 @@
 #include <net/request_sock.h>
 #include <net/netns/hash.h>
 #include <net/tcp_states.h>
+#include <net/l3mdev.h>
 
 /** struct ip_options - IP Options
  *
@@ -113,6 +114,19 @@ static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb)
        return sk->sk_mark;
 }
 
+static inline int inet_request_bound_dev_if(const struct sock *sk,
+                                           struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_L3_MASTER_DEV
+       struct net *net = sock_net(sk);
+
+       if (!sk->sk_bound_dev_if && net->ipv4.sysctl_tcp_l3mdev_accept)
+               return l3mdev_master_ifindex_by_index(net, skb->skb_iif);
+#endif
+
+       return sk->sk_bound_dev_if;
+}
+
 struct inet_cork {
        unsigned int            flags;
        __be32                  addr;
@@ -210,18 +224,37 @@ struct inet_sock {
 #define IP_CMSG_ORIGDSTADDR    BIT(6)
 #define IP_CMSG_CHECKSUM       BIT(7)
 
-/* SYNACK messages might be attached to request sockets.
+/**
+ * sk_to_full_sk - Access to a full socket
+ * @sk: pointer to a socket
+ *
+ * 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)
+static inline struct sock *sk_to_full_sk(struct sock *sk)
 {
-       struct sock *sk = skb->sk;
-
+#ifdef CONFIG_INET
        if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
                sk = inet_reqsk(sk)->rsk_listener;
+#endif
        return sk;
 }
 
+/* sk_to_full_sk() variant with a const argument */
+static inline const struct sock *sk_const_to_full_sk(const struct sock *sk)
+{
+#ifdef CONFIG_INET
+       if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
+               sk = ((const struct request_sock *)sk)->rsk_listener;
+#endif
+       return sk;
+}
+
+static inline struct sock *skb_to_full_sk(const struct sk_buff *skb)
+{
+       return sk_to_full_sk(skb->sk);
+}
+
 static inline struct inet_sock *inet_sk(const struct sock *sk)
 {
        return (struct inet_sock *)sk;