--- zzzz-none-000/linux-5.4.213/net/l2tp/l2tp_core.h	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/net/l2tp/l2tp_core.h	2024-05-29 11:20:02.000000000 +0000
@@ -58,6 +58,7 @@
 						 * control of LNS. */
 	int			debug;		/* bitmask of debug message
 						 * categories */
+	u16			offset;		/* offset to payload */
 	u16			l2specific_type; /* Layer 2 specific type */
 	u8			cookie[8];	/* optional cookie */
 	int			cookie_len;	/* 0, 4 or 8 bytes */
@@ -81,6 +82,8 @@
 	int			cookie_len;
 	u8			peer_cookie[8];
 	int			peer_cookie_len;
+	u16			offset;		/* offset from end of L2TP header
+						   to beginning of data */
 	u16			l2specific_type;
 	u16			hdr_len;
 	u32			nr;		/* session NR state (receive) */
@@ -200,6 +203,8 @@
 struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth);
 struct l2tp_session *l2tp_session_get_by_ifname(const struct net *net,
 						const char *ifname);
+void l2tp_stats_update(struct l2tp_tunnel *tunnel, struct l2tp_session *session,
+		       struct l2tp_stats *stats);
 
 int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id,
 		       u32 peer_tunnel_id, struct l2tp_tunnel_cfg *cfg,