118 static inline struct l2tp_tunnel *l2tp_tunnel(struct sock *sk)  in l2tp_tunnel()  argument
120 	return sk->sk_user_data;  in l2tp_tunnel()
183 	struct sock *sk = NULL;  in l2tp_tunnel_sock_lookup()  local
195 			sk = sock->sk;  in l2tp_tunnel_sock_lookup()
198 		sk = tunnel->sock;  in l2tp_tunnel_sock_lookup()
199 		sock_hold(sk);  in l2tp_tunnel_sock_lookup()
203 	return sk;  in l2tp_tunnel_sock_lookup()
207 static void l2tp_tunnel_sock_put(struct sock *sk)  in l2tp_tunnel_sock_put()  argument
209 	struct l2tp_tunnel *tunnel = l2tp_sock_to_tunnel(sk);  in l2tp_tunnel_sock_put()
213 			sockfd_put(sk->sk_socket);  in l2tp_tunnel_sock_put()
215 		sock_put(sk);  in l2tp_tunnel_sock_put()
217 	sock_put(sk);  in l2tp_tunnel_sock_put()
949 int l2tp_udp_encap_recv(struct sock *sk, struct sk_buff *skb)  in l2tp_udp_encap_recv()  argument
953 	tunnel = l2tp_sock_to_tunnel(sk);  in l2tp_udp_encap_recv()
963 	sock_put(sk);  in l2tp_udp_encap_recv()
967 	sock_put(sk);  in l2tp_udp_encap_recv()
1106 	struct sock *sk = tunnel->sock;  in l2tp_xmit_skb()  local
1135 	bh_lock_sock(sk);  in l2tp_xmit_skb()
1136 	if (sock_owned_by_user(sk)) {  in l2tp_xmit_skb()
1144 	skb_dst_set(skb, dst_clone(__sk_dst_check(sk, 0)));  in l2tp_xmit_skb()
1146 	inet = inet_sk(sk);  in l2tp_xmit_skb()
1161 		if (sk->sk_family == PF_INET6 && !tunnel->v4mapped)  in l2tp_xmit_skb()
1162 			udp6_set_csum(udp_get_no_check6_tx(sk),  in l2tp_xmit_skb()
1163 				      skb, &inet6_sk(sk)->saddr,  in l2tp_xmit_skb()
1164 				      &sk->sk_v6_daddr, udp_len);  in l2tp_xmit_skb()
1167 		udp_set_csum(sk->sk_no_check_tx, skb, inet->inet_saddr,  in l2tp_xmit_skb()
1177 	bh_unlock_sock(sk);  in l2tp_xmit_skb()
1191 static void l2tp_tunnel_destruct(struct sock *sk)  in l2tp_tunnel_destruct()  argument
1193 	struct l2tp_tunnel *tunnel = l2tp_tunnel(sk);  in l2tp_tunnel_destruct()
1206 		(udp_sk(sk))->encap_type = 0;  in l2tp_tunnel_destruct()
1207 		(udp_sk(sk))->encap_rcv = NULL;  in l2tp_tunnel_destruct()
1208 		(udp_sk(sk))->encap_destroy = NULL;  in l2tp_tunnel_destruct()
1215 	sk->sk_destruct = tunnel->old_sk_destruct;  in l2tp_tunnel_destruct()
1216 	sk->sk_user_data = NULL;  in l2tp_tunnel_destruct()
1230 	if (sk->sk_destruct)  in l2tp_tunnel_destruct()
1231 		(*sk->sk_destruct)(sk);  in l2tp_tunnel_destruct()
1292 static void l2tp_udp_encap_destroy(struct sock *sk)  in l2tp_udp_encap_destroy()  argument
1294 	struct l2tp_tunnel *tunnel = l2tp_sock_to_tunnel(sk);  in l2tp_udp_encap_destroy()
1297 		sock_put(sk);  in l2tp_udp_encap_destroy()
1317 	struct sock *sk = NULL;  in l2tp_tunnel_del_work()  local
1320 	sk = l2tp_tunnel_sock_lookup(tunnel);  in l2tp_tunnel_del_work()
1321 	if (!sk)  in l2tp_tunnel_del_work()
1324 	sock = sk->sk_socket;  in l2tp_tunnel_del_work()
1339 		sk_release_kernel(sk);  in l2tp_tunnel_del_work()
1342 	l2tp_tunnel_sock_put(sk);  in l2tp_tunnel_del_work()
1409 			sk_change_net(sock->sk, net);  in l2tp_tunnel_sock_create()
1439 			sk_change_net(sock->sk, net);  in l2tp_tunnel_sock_create()
1467 		sk_release_kernel(sock->sk);  in l2tp_tunnel_sock_create()
1481 	struct sock *sk = NULL;  in l2tp_tunnel_create()  local
1504 		if (!net_eq(sock_net(sock->sk), net)) {  in l2tp_tunnel_create()
1511 	sk = sock->sk;  in l2tp_tunnel_create()
1520 		if (sk->sk_protocol != IPPROTO_UDP) {  in l2tp_tunnel_create()
1522 			       tunnel_id, fd, sk->sk_protocol, IPPROTO_UDP);  in l2tp_tunnel_create()
1528 		if (sk->sk_protocol != IPPROTO_L2TP) {  in l2tp_tunnel_create()
1530 			       tunnel_id, fd, sk->sk_protocol, IPPROTO_L2TP);  in l2tp_tunnel_create()
1537 	tunnel = l2tp_tunnel(sk);  in l2tp_tunnel_create()
1567 	if (sk->sk_family == PF_INET6) {  in l2tp_tunnel_create()
1568 		struct ipv6_pinfo *np = inet6_sk(sk);  in l2tp_tunnel_create()
1571 		    ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {  in l2tp_tunnel_create()
1572 			struct inet_sock *inet = inet_sk(sk);  in l2tp_tunnel_create()
1576 			inet->inet_rcv_saddr = sk->sk_v6_rcv_saddr.s6_addr32[3];  in l2tp_tunnel_create()
1577 			inet->inet_daddr = sk->sk_v6_daddr.s6_addr32[3];  in l2tp_tunnel_create()
1596 		sk->sk_user_data = tunnel;  in l2tp_tunnel_create()
1602 	tunnel->old_sk_destruct = sk->sk_destruct;  in l2tp_tunnel_create()
1603 	sk->sk_destruct = &l2tp_tunnel_destruct;  in l2tp_tunnel_create()
1604 	tunnel->sock = sk;  in l2tp_tunnel_create()
1606 	lockdep_set_class_and_name(&sk->sk_lock.slock, &l2tp_socket_class, "l2tp_sock");  in l2tp_tunnel_create()
1608 	sk->sk_allocation = GFP_ATOMIC;  in l2tp_tunnel_create()