net/ipv6/ip6_vti.c

76 	for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
94 	struct ip6_tnl *t;
99 		if (ipv6_addr_equal(local, &t->parms.laddr) &&
100 		    ipv6_addr_equal(remote, &t->parms.raddr) &&
101 		    (t->dev->flags & IFF_UP))
102 			return t;
108 		if (ipv6_addr_equal(local, &t->parms.laddr) &&
109 		    (t->dev->flags & IFF_UP))
110 			return t;
115 		if (ipv6_addr_equal(remote, &t->parms.raddr) &&
116 		    (t->dev->flags & IFF_UP))
117 			return t;
120 	t = rcu_dereference(ip6n->tnls_wc[0]);
121 	if (t && (t->dev->flags & IFF_UP))
122 		return t;
154 vti6_tnl_link(struct vti6_net *ip6n, struct ip6_tnl *t)
156 	struct ip6_tnl __rcu **tp = vti6_tnl_bucket(ip6n, &t->parms);
158 	rcu_assign_pointer(t->next, rtnl_dereference(*tp));
159 	rcu_assign_pointer(*tp, t);
163 vti6_tnl_unlink(struct vti6_net *ip6n, struct ip6_tnl *t)
168 	for (tp = vti6_tnl_bucket(ip6n, &t->parms);
171 		if (t == iter) {
172 			rcu_assign_pointer(*tp, t->next);
180 	struct ip6_tnl *t = netdev_priv(dev);
181 	struct vti6_net *ip6n = net_generic(t->net, vti6_net_id);
189 	strcpy(t->parms.name, dev->name);
191 	vti6_tnl_link(ip6n, t);
202 	struct ip6_tnl *t;
214 	dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, vti6_dev_setup);
220 	t = netdev_priv(dev);
221 	t->parms = *p;
222 	t->net = dev_net(dev);
228 	return t;
256 	struct ip6_tnl *t;
260 	     (t = rtnl_dereference(*tp)) != NULL;
261 	     tp = &t->next) {
262 		if (ipv6_addr_equal(local, &t->parms.laddr) &&
263 		    ipv6_addr_equal(remote, &t->parms.raddr)) {
267 			return t;
284 	struct ip6_tnl *t = netdev_priv(dev);
285 	struct vti6_net *ip6n = net_generic(t->net, vti6_net_id);
290 		vti6_tnl_unlink(ip6n, t);
291 	netdev_put(dev, &t->dev_tracker);
297 	struct ip6_tnl *t;
301 	t = vti6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr, &ipv6h->daddr);
302 	if (t) {
303 		if (t->parms.proto != IPPROTO_IPV6 && t->parms.proto != 0) {
314 		if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) {
315 			DEV_STATS_INC(t->dev, rx_dropped);
322 		XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = t;
347 	struct ip6_tnl *t = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6;
351 	if (!t)
354 	dev = t->dev;
378 	skb->mark = be32_to_cpu(t->parms.i_key);
385 	skb_scrub_packet(skb, !net_eq(t->net, dev_net(skb->dev)));
394  *   @t: the outgoing tunnel device
399  *   doesn't match source of incoming packet.
406 vti6_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr)
408 	return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
443 	struct ip6_tnl *t = netdev_priv(dev);
482 	dst = xfrm_lookup_route(t->net, dst, fl, NULL, 0);
493 	if (!vti6_state_check(x, &t->parms.raddr, &t->parms.laddr))
496 	if (!ip6_tnl_xmit_ctl(t, (const struct in6_addr *)&x->props.saddr,
505 				     t->parms.name);
530 	skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev)));
534 	err = dst_output(t->net, skb->sk, skb);
551 	struct ip6_tnl *t = netdev_priv(dev);
562 		if ((t->parms.proto != IPPROTO_IPV6 && t->parms.proto != 0) ||
563 		    vti6_addr_conflict(t, ipv6_hdr(skb)))
578 	fl.flowi_mark = be32_to_cpu(t->parms.o_key);
599 	struct ip6_tnl *t;
607 	t = vti6_tnl_lookup(dev_net(skb->dev), &iph->daddr, &iph->saddr);
608 	if (!t)
611 	mark = be32_to_cpu(t->parms.o_key);
649 static void vti6_link_config(struct ip6_tnl *t, bool keep_mtu)
651 	struct net_device *dev = t->dev;
652 	struct __ip6_tnl_parm *p = &t->parms;
661 	p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr);
677 		struct rt6_info *rt = rt6_lookup(t->net,
687 		tdev = __dev_get_by_index(t->net, p->link);
699  *   @t: tunnel to be changed
701  *   @keep_mtu: MTU was set from userspace, don't re-compute it
707 vti6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p,
710 	t->parms.laddr = p->laddr;
711 	t->parms.raddr = p->raddr;
712 	t->parms.link = p->link;
713 	t->parms.i_key = p->i_key;
714 	t->parms.o_key = p->o_key;
715 	t->parms.proto = p->proto;
716 	t->parms.fwmark = p->fwmark;
717 	dst_cache_reset(&t->dst_cache);
718 	vti6_link_config(t, keep_mtu);
722 static int vti6_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p,
725 	struct net *net = dev_net(t->dev);
729 	vti6_tnl_unlink(ip6n, t);
731 	err = vti6_tnl_change(t, p, keep_mtu);
732 	vti6_tnl_link(ip6n, t);
733 	netdev_state_change(t->dev);
790  *   %-EPERM if current process hasn't %CAP_NET_ADMIN set
801 	struct ip6_tnl *t = NULL;
815 			t = vti6_locate(net, &p1, 0);
819 		if (!t)
820 			t = netdev_priv(dev);
821 		vti6_parm_to_user(&p, &t->parms);
837 		t = vti6_locate(net, &p1, cmd == SIOCADDTUNNEL);
839 			if (t) {
840 				if (t->dev != dev) {
845 				t = netdev_priv(dev);
847 			err = vti6_update(t, &p1, false);
849 		if (t) {
851 			vti6_parm_to_user(&p, &t->parms);
869 			t = vti6_locate(net, &p1, 0);
870 			if (!t)
873 			if (t->dev == ip6n->fb_tnl_dev)
875 			dev = t->dev;
925 	struct ip6_tnl *t = netdev_priv(dev);
927 	t->dev = dev;
928 	netdev_hold(dev, &t->dev_tracker, GFP_KERNEL);
939 	struct ip6_tnl *t = netdev_priv(dev);
944 	vti6_link_config(t, true);
956 	struct ip6_tnl *t = netdev_priv(dev);
960 	t->net = net;
961 	t->parms.proto = IPPROTO_IPV6;
963 	rcu_assign_pointer(ip6n->tnls_wc[0], t);
1034 	struct ip6_tnl *t;
1044 	t = vti6_locate(net, &p, 0);
1046 	if (t) {
1047 		if (t->dev != dev)
1050 		t = netdev_priv(dev);
1052 	return vti6_update(t, &p, tb && tb[IFLA_MTU]);
1118 	struct ip6_tnl *t;
1122 		t = rtnl_net_dereference(net, ip6n->tnls_r_l[h]);
1123 		while (t) {
1124 			unregister_netdevice_queue(t->dev, list);
1125 			t = rtnl_net_dereference(net, t->next);
1129 	t = rtnl_net_dereference(net, ip6n->tnls_wc[0]);
1130 	if (t)
1131 		unregister_netdevice_queue(t->dev, list);
1137 	struct ip6_tnl *t = NULL;
1162 	t = netdev_priv(ip6n->fb_tnl_dev);
1164 	strcpy(t->parms.name, ip6n->fb_tnl_dev->name);