118 static inline struct l2tp_tunnel *l2tp_tunnel(struct sock *sk)  in l2tp_tunnel()
179 static struct sock *l2tp_tunnel_sock_lookup(struct l2tp_tunnel *tunnel)  in l2tp_tunnel_sock_lookup()
182 	struct socket *sock = NULL;  in l2tp_tunnel_sock_lookup()  local
183 	struct sock *sk = NULL;  in l2tp_tunnel_sock_lookup()
193 		sock = sockfd_lookup(tunnel->fd, &err);  in l2tp_tunnel_sock_lookup()
194 		if (sock)  in l2tp_tunnel_sock_lookup()
195 			sk = sock->sk;  in l2tp_tunnel_sock_lookup()
198 		sk = tunnel->sock;  in l2tp_tunnel_sock_lookup()
207 static void l2tp_tunnel_sock_put(struct sock *sk)  in l2tp_tunnel_sock_put()
949 int l2tp_udp_encap_recv(struct sock *sk, struct sk_buff *skb)  in l2tp_udp_encap_recv()
1079 	if (tunnel->sock->sk_family == PF_INET6 && !tunnel->v4mapped)  in l2tp_xmit_core()
1080 		error = inet6_csk_xmit(tunnel->sock, skb, NULL);  in l2tp_xmit_core()
1083 		error = ip_queue_xmit(tunnel->sock, skb, fl);  in l2tp_xmit_core()
1106 	struct sock *sk = tunnel->sock;  in l2tp_xmit_skb()
1191 static void l2tp_tunnel_destruct(struct sock *sk)  in l2tp_tunnel_destruct()
1217 	tunnel->sock = NULL;  in l2tp_tunnel_destruct()
1292 static void l2tp_udp_encap_destroy(struct sock *sk)  in l2tp_udp_encap_destroy()
1307 	BUG_ON(tunnel->sock != NULL);  in l2tp_tunnel_free()
1316 	struct socket *sock = NULL;  in l2tp_tunnel_del_work()  local
1317 	struct sock *sk = NULL;  in l2tp_tunnel_del_work()
1324 	sock = sk->sk_socket;  in l2tp_tunnel_del_work()
1334 		if (sock)  in l2tp_tunnel_del_work()
1335 			inet_shutdown(sock, 2);  in l2tp_tunnel_del_work()
1337 		if (sock)  in l2tp_tunnel_del_work()
1338 			kernel_sock_shutdown(sock, SHUT_RDWR);  in l2tp_tunnel_del_work()
1363 	struct socket *sock = NULL;  in l2tp_tunnel_sock_create()  local
1393 		err = udp_sock_create(net, &udp_conf, &sock);  in l2tp_tunnel_sock_create()
1405 					  IPPROTO_L2TP, &sock);  in l2tp_tunnel_sock_create()
1409 			sk_change_net(sock->sk, net);  in l2tp_tunnel_sock_create()
1415 			err = kernel_bind(sock, (struct sockaddr *) &ip6_addr,  in l2tp_tunnel_sock_create()
1424 			err = kernel_connect(sock,  in l2tp_tunnel_sock_create()
1435 					  IPPROTO_L2TP, &sock);  in l2tp_tunnel_sock_create()
1439 			sk_change_net(sock->sk, net);  in l2tp_tunnel_sock_create()
1444 			err = kernel_bind(sock, (struct sockaddr *) &ip_addr,  in l2tp_tunnel_sock_create()
1452 			err = kernel_connect(sock, (struct sockaddr *) &ip_addr,  in l2tp_tunnel_sock_create()
1464 	*sockp = sock;  in l2tp_tunnel_sock_create()
1465 	if ((err < 0) && sock) {  in l2tp_tunnel_sock_create()
1466 		kernel_sock_shutdown(sock, SHUT_RDWR);  in l2tp_tunnel_sock_create()
1467 		sk_release_kernel(sock->sk);  in l2tp_tunnel_sock_create()
1480 	struct socket *sock = NULL;  in l2tp_tunnel_create()  local
1481 	struct sock *sk = NULL;  in l2tp_tunnel_create()
1491 				cfg, &sock);  in l2tp_tunnel_create()
1495 		sock = sockfd_lookup(fd, &err);  in l2tp_tunnel_create()
1496 		if (!sock) {  in l2tp_tunnel_create()
1504 		if (!net_eq(sock_net(sock->sk), net)) {  in l2tp_tunnel_create()
1511 	sk = sock->sk;  in l2tp_tunnel_create()
1594 		setup_udp_tunnel_sock(net, sock, &udp_cfg);  in l2tp_tunnel_create()
1604 	tunnel->sock = sk;  in l2tp_tunnel_create()
1633 	if (sock && sock->file)  in l2tp_tunnel_create()
1634 		sockfd_put(sock);  in l2tp_tunnel_create()
1666 		sock_put(tunnel->sock);  in l2tp_session_free()
1804 		sock_hold(tunnel->sock);  in l2tp_session_create()