82 /* Tunnel hash table */
93    it will match only tunnel with the same key; if it is not present,
94    it will match only keyless tunnel.
97    will match fallback tunnel.
113 /* Given src, dst and key, find appropriate for input tunnel. */
450 			net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n",  in ip6gre_err()
466 				net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n",  in ip6gre_err()
496 	struct ip6_tnl *tunnel;  in ip6gre_rcv()  local
499 	tunnel = ip6gre_tunnel_lookup(skb->dev,  in ip6gre_rcv()
502 	if (tunnel) {  in ip6gre_rcv()
503 		if (tunnel->parms.collect_md) {  in ip6gre_rcv()
515 			ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);  in ip6gre_rcv()
517 			ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error);  in ip6gre_rcv()
533 	struct ip6_tnl *tunnel;  in ip6erspan_rcv()  local
540 	tunnel = ip6gre_tunnel_lookup(skb->dev,  in ip6erspan_rcv()
543 	if (tunnel) {  in ip6erspan_rcv()
554 		if (tunnel->parms.collect_md) {  in ip6erspan_rcv()
588 			ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);  in ip6erspan_rcv()
591 			ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error);  in ip6erspan_rcv()
725 	struct ip6_tnl *tunnel = netdev_priv(dev);  in __gre6_xmit()  local
734 		fl6->daddr = tunnel->parms.raddr;  in __gre6_xmit()
736 	if (skb_cow_head(skb, dev->needed_headroom ?: tunnel->hlen))  in __gre6_xmit()
742 	if (tunnel->parms.collect_md) {  in __gre6_xmit()
763 		tunnel->tun_hlen = gre_calc_hlen(flags);  in __gre6_xmit()
765 		gre_build_header(skb, tunnel->tun_hlen,  in __gre6_xmit()
768 				 (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++)  in __gre6_xmit()
772 		if (tunnel->parms.o_flags & TUNNEL_SEQ)  in __gre6_xmit()
773 			tunnel->o_seqno++;  in __gre6_xmit()
775 		gre_build_header(skb, tunnel->tun_hlen, tunnel->parms.o_flags,  in __gre6_xmit()
776 				 protocol, tunnel->parms.o_key,  in __gre6_xmit()
777 				 htonl(tunnel->o_seqno));  in __gre6_xmit()
848  * ip6gre_tnl_addr_conflict - compare packet addresses to tunnel's own
849  *   @t: the outgoing tunnel device
853  *   Avoid trivial tunneling loop by checking that tunnel exit-point
975 	/* For collect_md mode, derive fl6 from the tunnel key,  in ip6erspan_tunnel_xmit()
1161 static int ip6gre_calc_hlen(struct ip6_tnl *tunnel)  in ip6gre_calc_hlen()  argument
1165 	tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags);  in ip6gre_calc_hlen()
1166 	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;  in ip6gre_calc_hlen()
1168 	t_hlen = tunnel->hlen + sizeof(struct ipv6hdr);  in ip6gre_calc_hlen()
1170 	if (tunnel->dev->header_ops)  in ip6gre_calc_hlen()
1171 		tunnel->dev->hard_header_len = LL_MAX_HEADER + t_hlen;  in ip6gre_calc_hlen()
1173 		tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen;  in ip6gre_calc_hlen()
1467 	struct ip6_tnl *tunnel;  in ip6gre_tunnel_init_common()  local
1471 	tunnel = netdev_priv(dev);  in ip6gre_tunnel_init_common()
1473 	tunnel->dev = dev;  in ip6gre_tunnel_init_common()
1474 	tunnel->net = dev_net(dev);  in ip6gre_tunnel_init_common()
1475 	strcpy(tunnel->parms.name, dev->name);  in ip6gre_tunnel_init_common()
1481 	ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);  in ip6gre_tunnel_init_common()
1485 	ret = gro_cells_init(&tunnel->gro_cells, dev);  in ip6gre_tunnel_init_common()
1489 	t_hlen = ip6gre_calc_hlen(tunnel);  in ip6gre_tunnel_init_common()
1493 	if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))  in ip6gre_tunnel_init_common()
1496 	if (tunnel->parms.collect_md) {  in ip6gre_tunnel_init_common()
1505 	dst_cache_destroy(&tunnel->dst_cache);  in ip6gre_tunnel_init_common()
1514 	struct ip6_tnl *tunnel;  in ip6gre_tunnel_init()  local
1521 	tunnel = netdev_priv(dev);  in ip6gre_tunnel_init()
1523 	if (tunnel->parms.collect_md)  in ip6gre_tunnel_init()
1526 	memcpy(dev->dev_addr, &tunnel->parms.laddr, sizeof(struct in6_addr));  in ip6gre_tunnel_init()
1527 	memcpy(dev->broadcast, &tunnel->parms.raddr, sizeof(struct in6_addr));  in ip6gre_tunnel_init()
1529 	if (ipv6_addr_any(&tunnel->parms.raddr))  in ip6gre_tunnel_init()
1537 	struct ip6_tnl *tunnel = netdev_priv(dev);  in ip6gre_fb_tunnel_init()  local
1539 	tunnel->dev = dev;  in ip6gre_fb_tunnel_init()
1540 	tunnel->net = dev_net(dev);  in ip6gre_fb_tunnel_init()
1541 	strcpy(tunnel->parms.name, dev->name);  in ip6gre_fb_tunnel_init()
1543 	tunnel->hlen		= sizeof(struct ipv6hdr) + 4;  in ip6gre_fb_tunnel_init()
1846 static int ip6erspan_calc_hlen(struct ip6_tnl *tunnel)  in ip6erspan_calc_hlen()  argument
1850 	tunnel->tun_hlen = 8;  in ip6erspan_calc_hlen()
1851 	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen +  in ip6erspan_calc_hlen()
1852 		       erspan_hdr_len(tunnel->parms.erspan_ver);  in ip6erspan_calc_hlen()
1854 	t_hlen = tunnel->hlen + sizeof(struct ipv6hdr);  in ip6erspan_calc_hlen()
1855 	tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen;  in ip6erspan_calc_hlen()
1861 	struct ip6_tnl *tunnel;  in ip6erspan_tap_init()  local
1865 	tunnel = netdev_priv(dev);  in ip6erspan_tap_init()
1867 	tunnel->dev = dev;  in ip6erspan_tap_init()
1868 	tunnel->net = dev_net(dev);  in ip6erspan_tap_init()
1869 	strcpy(tunnel->parms.name, dev->name);  in ip6erspan_tap_init()
1875 	ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);  in ip6erspan_tap_init()
1879 	ret = gro_cells_init(&tunnel->gro_cells, dev);  in ip6erspan_tap_init()
1883 	t_hlen = ip6erspan_calc_hlen(tunnel);  in ip6erspan_tap_init()
1887 	if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))  in ip6erspan_tap_init()
1891 	ip6erspan_tnl_link_config(tunnel, 1);  in ip6erspan_tap_init()
1897 	dst_cache_destroy(&tunnel->dst_cache);  in ip6erspan_tap_init()