87 	/* the IPv6 tunnel fallback device */
102  * ip6_tnl_lookup - fetch tunnel matching the end-point addresses
105  *   @remote: the address of the tunnel exit-point
106  *   @local: the address of the tunnel entry-point
109  *   tunnel matching given end-points if found,
110  *   else fallback tunnel if its device is up,
177  * ip6_tnl_bucket - get head of list matching given tunnel parameters
179  *   @p: parameters containing tunnel end-points
185  * Return: head of IPv6 tunnel list
204  * ip6_tnl_link - add tunnel to hash table
206  *   @t: tunnel to be added
221  * ip6_tnl_unlink - remove tunnel from hash table
223  *   @t: tunnel to be removed
274  * ip6_tnl_create - create a new tunnel
276  *   @p: tunnel parameters
279  *   Create tunnel matching given parameters.
282  *   created tunnel or error pointer
323  * ip6_tnl_locate - find or create tunnel matching given parameters
325  *   @p: tunnel parameters
326  *   @create: != 0 if allowed to create new tunnel if no match found
329  *   ip6_tnl_locate() first tries to locate an existing tunnel
331  *   tunnel device is created and registered for use.
334  *   matching tunnel or error pointer
364  * ip6_tnl_dev_uninit - tunnel device uninitializer
368  *   ip6_tnl_dev_uninit() removes tunnel from its list
466 /* ip6_tnl_err() should handle errors in the tunnel according to the
507 			net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n",  in ip6_tnl_err()
523 				net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n",  in ip6_tnl_err()
805 static int __ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb,  in __ip6_tnl_rcv()  argument
816 	if (test_bit(IP_TUNNEL_CSUM_BIT, tunnel->parms.i_flags) !=  in __ip6_tnl_rcv()
818 		DEV_STATS_INC(tunnel->dev, rx_crc_errors);  in __ip6_tnl_rcv()
819 		DEV_STATS_INC(tunnel->dev, rx_errors);  in __ip6_tnl_rcv()
823 	if (test_bit(IP_TUNNEL_SEQ_BIT, tunnel->parms.i_flags)) {  in __ip6_tnl_rcv()
825 		    (tunnel->i_seqno &&  in __ip6_tnl_rcv()
826 		     (s32)(ntohl(tpi->seq) - tunnel->i_seqno) < 0)) {  in __ip6_tnl_rcv()
827 			DEV_STATS_INC(tunnel->dev, rx_fifo_errors);  in __ip6_tnl_rcv()
828 			DEV_STATS_INC(tunnel->dev, rx_errors);  in __ip6_tnl_rcv()
831 		tunnel->i_seqno = ntohl(tpi->seq) + 1;  in __ip6_tnl_rcv()
837 	if (tunnel->dev->type == ARPHRD_ETHER) {  in __ip6_tnl_rcv()
839 			DEV_STATS_INC(tunnel->dev, rx_length_errors);  in __ip6_tnl_rcv()
840 			DEV_STATS_INC(tunnel->dev, rx_errors);  in __ip6_tnl_rcv()
844 		skb->protocol = eth_type_trans(skb, tunnel->dev);  in __ip6_tnl_rcv()
847 		skb->dev = tunnel->dev;  in __ip6_tnl_rcv()
860 		DEV_STATS_INC(tunnel->dev, rx_length_errors);  in __ip6_tnl_rcv()
861 		DEV_STATS_INC(tunnel->dev, rx_errors);  in __ip6_tnl_rcv()
870 	__skb_tunnel_rx(skb, tunnel->dev, tunnel->net);  in __ip6_tnl_rcv()
872 	err = dscp_ecn_decapsulate(tunnel, ipv6h, skb);  in __ip6_tnl_rcv()
879 			DEV_STATS_INC(tunnel->dev, rx_frame_errors);  in __ip6_tnl_rcv()
880 			DEV_STATS_INC(tunnel->dev, rx_errors);  in __ip6_tnl_rcv()
885 	dev_sw_netstats_rx_add(tunnel->dev, skb->len);  in __ip6_tnl_rcv()
887 	skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev)));  in __ip6_tnl_rcv()
892 	gro_cells_receive(&tunnel->gro_cells, skb);  in __ip6_tnl_rcv()
921 	/* no tunnel info required for ipxip6. */
926 	/* no tunnel info required for ipxip6. */
931 	/* no tunnel info required for mplsip6. */
1020  * ip6_tnl_addr_conflict - compare packet addresses to tunnel's own
1021  *   @t: the outgoing tunnel device
1025  *   Avoid trivial tunneling loop by checking that tunnel exit-point
1080  *   @dev: the outgoing tunnel device
1125 	/* NBMA tunnel */  in ip6_tnl_xmit()
1540  * ip6_tnl_change - update the tunnel parameters
1541  *   @t: tunnel to be changed
1542  *   @p: tunnel configuration parameters
1545  *   ip6_tnl_change() updates the tunnel parameters
1624  *   @dev: virtual device associated with tunnel
1634  *     %SIOCGETTUNNEL: get tunnel parameters for device
1635  *     %SIOCADDTUNNEL: add tunnel matching given tunnel parameters
1636  *     %SIOCCHGTUNNEL: change tunnel parameters to those given
1637  *     %SIOCDELTUNNEL: delete tunnel
1640  *   initialization, can be used for creating other tunnel devices.
1646  *   %-EINVAL if passed tunnel parameters are invalid,
1647  *   %-EEXIST if changing a tunnel's parameters would cause a conflict
1748  * ip6_tnl_change_mtu - change mtu manually for tunnel device
1749  *   @dev: virtual device associated with tunnel
1887  * ip6_tnl_dev_setup - setup virtual tunnel device
1888  *   @dev: virtual device associated with tunnel
1918  * ip6_tnl_dev_init_gen - general initializer for all tunnel devices
1919  *   @dev: virtual device associated with tunnel
1961  * ip6_tnl_dev_init - initializer for all non fallback tunnel devices
1962  *   @dev: virtual device associated with tunnel
1979  * ip6_fb_tnl_dev_init - initializer for fallback tunnel device
2113 					       "Only protocol can be changed for fallback tunnel, not encap params");  in ip6_tnl_changelink()
2121 				       "Only protocol can be changed for fallback tunnel");  in ip6_tnl_changelink()
2194 	struct ip6_tnl *tunnel = netdev_priv(dev);  in ip6_tnl_fill_info()  local
2195 	struct __ip6_tnl_parm *parm = &tunnel->parms;  in ip6_tnl_fill_info()
2208 	if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, tunnel->encap.type) ||  in ip6_tnl_fill_info()
2209 	    nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, tunnel->encap.sport) ||  in ip6_tnl_fill_info()
2210 	    nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, tunnel->encap.dport) ||  in ip6_tnl_fill_info()
2211 	    nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, tunnel->encap.flags))  in ip6_tnl_fill_info()
2226 	struct ip6_tnl *tunnel = netdev_priv(dev);  in ip6_tnl_get_link_net()  local
2228 	return READ_ONCE(tunnel->net);  in ip6_tnl_get_link_net()