18 /* Random numbers used for internal consistency checks of tunnel and session structures */
22 /* Per tunnel session hash table size */
66  * Is linked into a per-tunnel session hashlist; and in the case of an L2TPv3 session into
74 	struct l2tp_tunnel	*tunnel;	/* back pointer to tunnel context */  member
86 	u32			nr_max;		/* max NR. Depends on tunnel */
132 /* L2TP tunnel configuration */
150 /* Represents a tunnel instance.
152  * Holds the tunnel socket (either passed from userspace or directly created by the kernel).
153  * Maintains a hashlist of sessions belonging to the tunnel instance.
164 	bool			acpt_newsess;	/* indicates whether this tunnel accepts
183 	int			fd;		/* parent fd, if tunnel socket was created
198 	int (*session_create)(struct net *net, struct l2tp_tunnel *tunnel,
215 /* Tunnel and session refcounts */
216 void l2tp_tunnel_inc_refcount(struct l2tp_tunnel *tunnel);
217 void l2tp_tunnel_dec_refcount(struct l2tp_tunnel *tunnel);
221 /* Tunnel and session lookup.
227 struct l2tp_session *l2tp_tunnel_get_session(struct l2tp_tunnel *tunnel,
231 struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth);
235 /* Tunnel and session lifetime management.
242 int l2tp_tunnel_register(struct l2tp_tunnel *tunnel, struct net *net,
244 void l2tp_tunnel_delete(struct l2tp_tunnel *tunnel);
247 					 struct l2tp_tunnel *tunnel,
251 			  struct l2tp_tunnel *tunnel);
263 /* Transmit path helpers for sending packets over the tunnel socket. */
277 /* Extract the tunnel structure from a socket's sk_user_data pointer,
278  * validating the tunnel magic feather.
293 static inline u32 l2tp_tunnel_dst_mtu(const struct l2tp_tunnel *tunnel)  in l2tp_tunnel_dst_mtu()  argument
298 	dst = sk_dst_get(tunnel->sock);  in l2tp_tunnel_dst_mtu()
309 static inline bool l2tp_tunnel_uses_xfrm(const struct l2tp_tunnel *tunnel)  in l2tp_tunnel_uses_xfrm()  argument
311 	struct sock *sk = tunnel->sock;  in l2tp_tunnel_uses_xfrm()
317 static inline bool l2tp_tunnel_uses_xfrm(const struct l2tp_tunnel *tunnel)  in l2tp_tunnel_uses_xfrm()  argument