blob: 3f6135bc54ef07cc2c71838f619897752d414b75 [file] [log] [blame]
Pravin B Shelarc5441932013-03-25 14:49:35 +00001/*
2 * Copyright (c) 2013 Nicira, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/capability.h>
22#include <linux/module.h>
23#include <linux/types.h>
24#include <linux/kernel.h>
25#include <linux/slab.h>
26#include <linux/uaccess.h>
27#include <linux/skbuff.h>
28#include <linux/netdevice.h>
29#include <linux/in.h>
30#include <linux/tcp.h>
31#include <linux/udp.h>
32#include <linux/if_arp.h>
33#include <linux/mroute.h>
34#include <linux/init.h>
35#include <linux/in6.h>
36#include <linux/inetdevice.h>
37#include <linux/igmp.h>
38#include <linux/netfilter_ipv4.h>
39#include <linux/etherdevice.h>
40#include <linux/if_ether.h>
41#include <linux/if_vlan.h>
42#include <linux/rculist.h>
Sachin Kamat27d79f32014-01-27 12:13:57 +053043#include <linux/err.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +000044
45#include <net/sock.h>
46#include <net/ip.h>
47#include <net/icmp.h>
48#include <net/protocol.h>
49#include <net/ip_tunnels.h>
50#include <net/arp.h>
51#include <net/checksum.h>
52#include <net/dsfield.h>
53#include <net/inet_ecn.h>
54#include <net/xfrm.h>
55#include <net/net_namespace.h>
56#include <net/netns/generic.h>
57#include <net/rtnetlink.h>
58
59#if IS_ENABLED(CONFIG_IPV6)
60#include <net/ipv6.h>
61#include <net/ip6_fib.h>
62#include <net/ip6_route.h>
63#endif
64
Duan Jiong967680e2014-01-19 16:43:42 +080065static unsigned int ip_tunnel_hash(__be32 key, __be32 remote)
Pravin B Shelarc5441932013-03-25 14:49:35 +000066{
67 return hash_32((__force u32)key ^ (__force u32)remote,
68 IP_TNL_HASH_BITS);
69}
70
Eric Dumazet6c7e7612014-01-16 16:41:19 -080071static void __tunnel_dst_set(struct ip_tunnel_dst *idst,
72 struct dst_entry *dst)
Tom Herbert7d442fa2014-01-02 11:48:26 -080073{
74 struct dst_entry *old_dst;
75
Eric Dumazet6c7e7612014-01-16 16:41:19 -080076 if (dst) {
77 if (dst->flags & DST_NOCACHE)
78 dst = NULL;
79 else
80 dst_clone(dst);
81 }
82 old_dst = xchg((__force struct dst_entry **)&idst->dst, dst);
Tom Herbert7d442fa2014-01-02 11:48:26 -080083 dst_release(old_dst);
Tom Herbert7d442fa2014-01-02 11:48:26 -080084}
85
Eric Dumazet6c7e7612014-01-16 16:41:19 -080086static void tunnel_dst_set(struct ip_tunnel *t, struct dst_entry *dst)
Tom Herbert7d442fa2014-01-02 11:48:26 -080087{
Tom Herbert9a4aa9a2014-01-02 11:48:33 -080088 __tunnel_dst_set(this_cpu_ptr(t->dst_cache), dst);
Tom Herbert7d442fa2014-01-02 11:48:26 -080089}
90
Eric Dumazet6c7e7612014-01-16 16:41:19 -080091static void tunnel_dst_reset(struct ip_tunnel *t)
Tom Herbert7d442fa2014-01-02 11:48:26 -080092{
93 tunnel_dst_set(t, NULL);
94}
95
Nicolas Dichtelcf71d2bc2014-02-20 10:19:31 +010096void ip_tunnel_dst_reset_all(struct ip_tunnel *t)
Tom Herbert9a4aa9a2014-01-02 11:48:33 -080097{
98 int i;
99
100 for_each_possible_cpu(i)
101 __tunnel_dst_set(per_cpu_ptr(t->dst_cache, i), NULL);
102}
Nicolas Dichtelcf71d2bc2014-02-20 10:19:31 +0100103EXPORT_SYMBOL(ip_tunnel_dst_reset_all);
Tom Herbert9a4aa9a2014-01-02 11:48:33 -0800104
Eric Dumazetb045d372014-02-03 12:52:14 -0800105static struct rtable *tunnel_rtable_get(struct ip_tunnel *t, u32 cookie)
Tom Herbert7d442fa2014-01-02 11:48:26 -0800106{
107 struct dst_entry *dst;
108
109 rcu_read_lock();
Tom Herbert9a4aa9a2014-01-02 11:48:33 -0800110 dst = rcu_dereference(this_cpu_ptr(t->dst_cache)->dst);
Eric Dumazetb045d372014-02-03 12:52:14 -0800111 if (dst) {
112 if (dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
113 rcu_read_unlock();
114 tunnel_dst_reset(t);
115 return NULL;
116 }
Tom Herbert7d442fa2014-01-02 11:48:26 -0800117 dst_hold(dst);
Tom Herbert7d442fa2014-01-02 11:48:26 -0800118 }
Eric Dumazetb045d372014-02-03 12:52:14 -0800119 rcu_read_unlock();
120 return (struct rtable *)dst;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800121}
122
Pravin B Shelarc5441932013-03-25 14:49:35 +0000123static bool ip_tunnel_key_match(const struct ip_tunnel_parm *p,
124 __be16 flags, __be32 key)
125{
126 if (p->i_flags & TUNNEL_KEY) {
127 if (flags & TUNNEL_KEY)
128 return key == p->i_key;
129 else
130 /* key expected, none present */
131 return false;
132 } else
133 return !(flags & TUNNEL_KEY);
134}
135
136/* Fallback tunnel: no source, no destination, no key, no options
137
138 Tunnel hash table:
139 We require exact key match i.e. if a key is present in packet
140 it will match only tunnel with the same key; if it is not present,
141 it will match only keyless tunnel.
142
143 All keysless packets, if not matched configured keyless tunnels
144 will match fallback tunnel.
145 Given src, dst and key, find appropriate for input tunnel.
146*/
147struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
148 int link, __be16 flags,
149 __be32 remote, __be32 local,
150 __be32 key)
151{
152 unsigned int hash;
153 struct ip_tunnel *t, *cand = NULL;
154 struct hlist_head *head;
155
Duan Jiong967680e2014-01-19 16:43:42 +0800156 hash = ip_tunnel_hash(key, remote);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000157 head = &itn->tunnels[hash];
158
159 hlist_for_each_entry_rcu(t, head, hash_node) {
160 if (local != t->parms.iph.saddr ||
161 remote != t->parms.iph.daddr ||
162 !(t->dev->flags & IFF_UP))
163 continue;
164
165 if (!ip_tunnel_key_match(&t->parms, flags, key))
166 continue;
167
168 if (t->parms.link == link)
169 return t;
170 else
171 cand = t;
172 }
173
174 hlist_for_each_entry_rcu(t, head, hash_node) {
175 if (remote != t->parms.iph.daddr ||
176 !(t->dev->flags & IFF_UP))
177 continue;
178
179 if (!ip_tunnel_key_match(&t->parms, flags, key))
180 continue;
181
182 if (t->parms.link == link)
183 return t;
184 else if (!cand)
185 cand = t;
186 }
187
Duan Jiong967680e2014-01-19 16:43:42 +0800188 hash = ip_tunnel_hash(key, 0);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000189 head = &itn->tunnels[hash];
190
191 hlist_for_each_entry_rcu(t, head, hash_node) {
192 if ((local != t->parms.iph.saddr &&
193 (local != t->parms.iph.daddr ||
194 !ipv4_is_multicast(local))) ||
195 !(t->dev->flags & IFF_UP))
196 continue;
197
198 if (!ip_tunnel_key_match(&t->parms, flags, key))
199 continue;
200
201 if (t->parms.link == link)
202 return t;
203 else if (!cand)
204 cand = t;
205 }
206
207 if (flags & TUNNEL_NO_KEY)
208 goto skip_key_lookup;
209
210 hlist_for_each_entry_rcu(t, head, hash_node) {
211 if (t->parms.i_key != key ||
212 !(t->dev->flags & IFF_UP))
213 continue;
214
215 if (t->parms.link == link)
216 return t;
217 else if (!cand)
218 cand = t;
219 }
220
221skip_key_lookup:
222 if (cand)
223 return cand;
224
225 if (itn->fb_tunnel_dev && itn->fb_tunnel_dev->flags & IFF_UP)
226 return netdev_priv(itn->fb_tunnel_dev);
227
228
229 return NULL;
230}
231EXPORT_SYMBOL_GPL(ip_tunnel_lookup);
232
233static struct hlist_head *ip_bucket(struct ip_tunnel_net *itn,
234 struct ip_tunnel_parm *parms)
235{
236 unsigned int h;
237 __be32 remote;
Steffen Klassert6d608f02014-02-21 08:41:09 +0100238 __be32 i_key = parms->i_key;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000239
240 if (parms->iph.daddr && !ipv4_is_multicast(parms->iph.daddr))
241 remote = parms->iph.daddr;
242 else
243 remote = 0;
244
Steffen Klassert6d608f02014-02-21 08:41:09 +0100245 if (!(parms->i_flags & TUNNEL_KEY) && (parms->i_flags & VTI_ISVTI))
246 i_key = 0;
247
248 h = ip_tunnel_hash(i_key, remote);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000249 return &itn->tunnels[h];
250}
251
252static void ip_tunnel_add(struct ip_tunnel_net *itn, struct ip_tunnel *t)
253{
254 struct hlist_head *head = ip_bucket(itn, &t->parms);
255
256 hlist_add_head_rcu(&t->hash_node, head);
257}
258
259static void ip_tunnel_del(struct ip_tunnel *t)
260{
261 hlist_del_init_rcu(&t->hash_node);
262}
263
264static struct ip_tunnel *ip_tunnel_find(struct ip_tunnel_net *itn,
265 struct ip_tunnel_parm *parms,
266 int type)
267{
268 __be32 remote = parms->iph.daddr;
269 __be32 local = parms->iph.saddr;
270 __be32 key = parms->i_key;
271 int link = parms->link;
272 struct ip_tunnel *t = NULL;
273 struct hlist_head *head = ip_bucket(itn, parms);
274
275 hlist_for_each_entry_rcu(t, head, hash_node) {
276 if (local == t->parms.iph.saddr &&
277 remote == t->parms.iph.daddr &&
278 key == t->parms.i_key &&
279 link == t->parms.link &&
280 type == t->dev->type)
281 break;
282 }
283 return t;
284}
285
286static struct net_device *__ip_tunnel_create(struct net *net,
287 const struct rtnl_link_ops *ops,
288 struct ip_tunnel_parm *parms)
289{
290 int err;
291 struct ip_tunnel *tunnel;
292 struct net_device *dev;
293 char name[IFNAMSIZ];
294
295 if (parms->name[0])
296 strlcpy(name, parms->name, IFNAMSIZ);
297 else {
Pravin B Shelar54a5d382013-03-28 08:21:46 +0000298 if (strlen(ops->kind) > (IFNAMSIZ - 3)) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000299 err = -E2BIG;
300 goto failed;
301 }
302 strlcpy(name, ops->kind, IFNAMSIZ);
303 strncat(name, "%d", 2);
304 }
305
306 ASSERT_RTNL();
307 dev = alloc_netdev(ops->priv_size, name, ops->setup);
308 if (!dev) {
309 err = -ENOMEM;
310 goto failed;
311 }
312 dev_net_set(dev, net);
313
314 dev->rtnl_link_ops = ops;
315
316 tunnel = netdev_priv(dev);
317 tunnel->parms = *parms;
Nicolas Dichtel5e6700b2013-06-26 16:11:28 +0200318 tunnel->net = net;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000319
320 err = register_netdevice(dev);
321 if (err)
322 goto failed_free;
323
324 return dev;
325
326failed_free:
327 free_netdev(dev);
328failed:
329 return ERR_PTR(err);
330}
331
Tom Herbert7d442fa2014-01-02 11:48:26 -0800332static inline void init_tunnel_flow(struct flowi4 *fl4,
333 int proto,
334 __be32 daddr, __be32 saddr,
335 __be32 key, __u8 tos, int oif)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000336{
337 memset(fl4, 0, sizeof(*fl4));
338 fl4->flowi4_oif = oif;
339 fl4->daddr = daddr;
340 fl4->saddr = saddr;
341 fl4->flowi4_tos = tos;
342 fl4->flowi4_proto = proto;
343 fl4->fl4_gre_key = key;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000344}
345
346static int ip_tunnel_bind_dev(struct net_device *dev)
347{
348 struct net_device *tdev = NULL;
349 struct ip_tunnel *tunnel = netdev_priv(dev);
350 const struct iphdr *iph;
351 int hlen = LL_MAX_HEADER;
352 int mtu = ETH_DATA_LEN;
353 int t_hlen = tunnel->hlen + sizeof(struct iphdr);
354
355 iph = &tunnel->parms.iph;
356
357 /* Guess output device to choose reasonable mtu and needed_headroom */
358 if (iph->daddr) {
359 struct flowi4 fl4;
360 struct rtable *rt;
361
Tom Herbert7d442fa2014-01-02 11:48:26 -0800362 init_tunnel_flow(&fl4, iph->protocol, iph->daddr,
363 iph->saddr, tunnel->parms.o_key,
364 RT_TOS(iph->tos), tunnel->parms.link);
365 rt = ip_route_output_key(tunnel->net, &fl4);
366
Pravin B Shelarc5441932013-03-25 14:49:35 +0000367 if (!IS_ERR(rt)) {
368 tdev = rt->dst.dev;
Eric Dumazet6c7e7612014-01-16 16:41:19 -0800369 tunnel_dst_set(tunnel, &rt->dst);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000370 ip_rt_put(rt);
371 }
372 if (dev->type != ARPHRD_ETHER)
373 dev->flags |= IFF_POINTOPOINT;
374 }
375
376 if (!tdev && tunnel->parms.link)
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200377 tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000378
379 if (tdev) {
380 hlen = tdev->hard_header_len + tdev->needed_headroom;
381 mtu = tdev->mtu;
382 }
383 dev->iflink = tunnel->parms.link;
384
385 dev->needed_headroom = t_hlen + hlen;
386 mtu -= (dev->hard_header_len + t_hlen);
387
388 if (mtu < 68)
389 mtu = 68;
390
391 return mtu;
392}
393
394static struct ip_tunnel *ip_tunnel_create(struct net *net,
395 struct ip_tunnel_net *itn,
396 struct ip_tunnel_parm *parms)
397{
398 struct ip_tunnel *nt, *fbt;
399 struct net_device *dev;
400
401 BUG_ON(!itn->fb_tunnel_dev);
402 fbt = netdev_priv(itn->fb_tunnel_dev);
403 dev = __ip_tunnel_create(net, itn->fb_tunnel_dev->rtnl_link_ops, parms);
404 if (IS_ERR(dev))
Florian Westphal6dd3c9e2014-02-14 13:14:39 +0100405 return ERR_CAST(dev);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000406
407 dev->mtu = ip_tunnel_bind_dev(dev);
408
409 nt = netdev_priv(dev);
410 ip_tunnel_add(itn, nt);
411 return nt;
412}
413
414int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
415 const struct tnl_ptk_info *tpi, bool log_ecn_error)
416{
Li RongQing8f849852014-01-04 13:57:59 +0800417 struct pcpu_sw_netstats *tstats;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000418 const struct iphdr *iph = ip_hdr(skb);
419 int err;
420
Pravin B Shelarc5441932013-03-25 14:49:35 +0000421#ifdef CONFIG_NET_IPGRE_BROADCAST
422 if (ipv4_is_multicast(iph->daddr)) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000423 tunnel->dev->stats.multicast++;
424 skb->pkt_type = PACKET_BROADCAST;
425 }
426#endif
427
428 if ((!(tpi->flags&TUNNEL_CSUM) && (tunnel->parms.i_flags&TUNNEL_CSUM)) ||
429 ((tpi->flags&TUNNEL_CSUM) && !(tunnel->parms.i_flags&TUNNEL_CSUM))) {
430 tunnel->dev->stats.rx_crc_errors++;
431 tunnel->dev->stats.rx_errors++;
432 goto drop;
433 }
434
435 if (tunnel->parms.i_flags&TUNNEL_SEQ) {
436 if (!(tpi->flags&TUNNEL_SEQ) ||
437 (tunnel->i_seqno && (s32)(ntohl(tpi->seq) - tunnel->i_seqno) < 0)) {
438 tunnel->dev->stats.rx_fifo_errors++;
439 tunnel->dev->stats.rx_errors++;
440 goto drop;
441 }
442 tunnel->i_seqno = ntohl(tpi->seq) + 1;
443 }
444
Ying Caie96f2e72014-05-04 15:20:04 -0700445 skb_reset_network_header(skb);
446
Pravin B Shelarc5441932013-03-25 14:49:35 +0000447 err = IP_ECN_decapsulate(iph, skb);
448 if (unlikely(err)) {
449 if (log_ecn_error)
450 net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n",
451 &iph->saddr, iph->tos);
452 if (err > 1) {
453 ++tunnel->dev->stats.rx_frame_errors;
454 ++tunnel->dev->stats.rx_errors;
455 goto drop;
456 }
457 }
458
459 tstats = this_cpu_ptr(tunnel->dev->tstats);
460 u64_stats_update_begin(&tstats->syncp);
461 tstats->rx_packets++;
462 tstats->rx_bytes += skb->len;
463 u64_stats_update_end(&tstats->syncp);
464
Alexei Starovoitov81b9eab2013-11-12 14:39:13 -0800465 skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev)));
466
Pravin B Shelar3d7b46c2013-06-17 17:50:02 -0700467 if (tunnel->dev->type == ARPHRD_ETHER) {
468 skb->protocol = eth_type_trans(skb, tunnel->dev);
469 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
470 } else {
471 skb->dev = tunnel->dev;
472 }
Nicolas Dichtel64261f22013-08-13 17:51:09 +0200473
Pravin B Shelarc5441932013-03-25 14:49:35 +0000474 gro_cells_receive(&tunnel->gro_cells, skb);
475 return 0;
476
477drop:
478 kfree_skb(skb);
479 return 0;
480}
481EXPORT_SYMBOL_GPL(ip_tunnel_rcv);
482
Pravin B Shelar23a36472013-07-02 10:57:33 -0700483static int tnl_update_pmtu(struct net_device *dev, struct sk_buff *skb,
484 struct rtable *rt, __be16 df)
485{
486 struct ip_tunnel *tunnel = netdev_priv(dev);
Alexander Duyck8c91e162013-07-11 13:12:22 -0700487 int pkt_size = skb->len - tunnel->hlen - dev->hard_header_len;
Pravin B Shelar23a36472013-07-02 10:57:33 -0700488 int mtu;
489
490 if (df)
491 mtu = dst_mtu(&rt->dst) - dev->hard_header_len
492 - sizeof(struct iphdr) - tunnel->hlen;
493 else
494 mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu;
495
496 if (skb_dst(skb))
497 skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
498
499 if (skb->protocol == htons(ETH_P_IP)) {
500 if (!skb_is_gso(skb) &&
501 (df & htons(IP_DF)) && mtu < pkt_size) {
502 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
503 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
504 return -E2BIG;
505 }
506 }
507#if IS_ENABLED(CONFIG_IPV6)
508 else if (skb->protocol == htons(ETH_P_IPV6)) {
509 struct rt6_info *rt6 = (struct rt6_info *)skb_dst(skb);
510
511 if (rt6 && mtu < dst_mtu(skb_dst(skb)) &&
512 mtu >= IPV6_MIN_MTU) {
513 if ((tunnel->parms.iph.daddr &&
514 !ipv4_is_multicast(tunnel->parms.iph.daddr)) ||
515 rt6->rt6i_dst.plen == 128) {
516 rt6->rt6i_flags |= RTF_MODIFIED;
517 dst_metric_set(skb_dst(skb), RTAX_MTU, mtu);
518 }
519 }
520
521 if (!skb_is_gso(skb) && mtu >= IPV6_MIN_MTU &&
522 mtu < pkt_size) {
523 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
524 return -E2BIG;
525 }
526 }
527#endif
528 return 0;
529}
530
Pravin B Shelarc5441932013-03-25 14:49:35 +0000531void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
Nicolas Dichtelbf3d6a82013-05-27 23:48:15 +0000532 const struct iphdr *tnl_params, const u8 protocol)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000533{
534 struct ip_tunnel *tunnel = netdev_priv(dev);
535 const struct iphdr *inner_iph;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000536 struct flowi4 fl4;
537 u8 tos, ttl;
538 __be16 df;
Eric Dumazetb045d372014-02-03 12:52:14 -0800539 struct rtable *rt; /* Route to the other host */
Pravin B Shelarc5441932013-03-25 14:49:35 +0000540 unsigned int max_headroom; /* The extra header space needed */
541 __be32 dst;
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -0700542 int err;
Timo Teräs22fb22e2014-05-16 08:34:39 +0300543 bool connected;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000544
545 inner_iph = (const struct iphdr *)skb_inner_network_header(skb);
Timo Teräs22fb22e2014-05-16 08:34:39 +0300546 connected = (tunnel->parms.iph.daddr != 0);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000547
548 dst = tnl_params->daddr;
549 if (dst == 0) {
550 /* NBMA tunnel */
551
552 if (skb_dst(skb) == NULL) {
553 dev->stats.tx_fifo_errors++;
554 goto tx_error;
555 }
556
557 if (skb->protocol == htons(ETH_P_IP)) {
558 rt = skb_rtable(skb);
559 dst = rt_nexthop(rt, inner_iph->daddr);
560 }
561#if IS_ENABLED(CONFIG_IPV6)
562 else if (skb->protocol == htons(ETH_P_IPV6)) {
563 const struct in6_addr *addr6;
564 struct neighbour *neigh;
565 bool do_tx_error_icmp;
566 int addr_type;
567
568 neigh = dst_neigh_lookup(skb_dst(skb),
569 &ipv6_hdr(skb)->daddr);
570 if (neigh == NULL)
571 goto tx_error;
572
573 addr6 = (const struct in6_addr *)&neigh->primary_key;
574 addr_type = ipv6_addr_type(addr6);
575
576 if (addr_type == IPV6_ADDR_ANY) {
577 addr6 = &ipv6_hdr(skb)->daddr;
578 addr_type = ipv6_addr_type(addr6);
579 }
580
581 if ((addr_type & IPV6_ADDR_COMPATv4) == 0)
582 do_tx_error_icmp = true;
583 else {
584 do_tx_error_icmp = false;
585 dst = addr6->s6_addr32[3];
586 }
587 neigh_release(neigh);
588 if (do_tx_error_icmp)
589 goto tx_error_icmp;
590 }
591#endif
592 else
593 goto tx_error;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800594
595 connected = false;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000596 }
597
598 tos = tnl_params->tos;
599 if (tos & 0x1) {
600 tos &= ~0x1;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800601 if (skb->protocol == htons(ETH_P_IP)) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000602 tos = inner_iph->tos;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800603 connected = false;
604 } else if (skb->protocol == htons(ETH_P_IPV6)) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000605 tos = ipv6_get_dsfield((const struct ipv6hdr *)inner_iph);
Tom Herbert7d442fa2014-01-02 11:48:26 -0800606 connected = false;
607 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000608 }
609
Tom Herbert7d442fa2014-01-02 11:48:26 -0800610 init_tunnel_flow(&fl4, protocol, dst, tnl_params->saddr,
611 tunnel->parms.o_key, RT_TOS(tos), tunnel->parms.link);
612
Eric Dumazetb045d372014-02-03 12:52:14 -0800613 rt = connected ? tunnel_rtable_get(tunnel, 0) : NULL;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800614
615 if (!rt) {
616 rt = ip_route_output_key(tunnel->net, &fl4);
617
618 if (IS_ERR(rt)) {
619 dev->stats.tx_carrier_errors++;
620 goto tx_error;
621 }
622 if (connected)
Eric Dumazet6c7e7612014-01-16 16:41:19 -0800623 tunnel_dst_set(tunnel, &rt->dst);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000624 }
Tom Herbert7d442fa2014-01-02 11:48:26 -0800625
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -0700626 if (rt->dst.dev == dev) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000627 ip_rt_put(rt);
628 dev->stats.collisions++;
629 goto tx_error;
630 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000631
Pravin B Shelar23a36472013-07-02 10:57:33 -0700632 if (tnl_update_pmtu(dev, skb, rt, tnl_params->frag_off)) {
633 ip_rt_put(rt);
634 goto tx_error;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000635 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000636
637 if (tunnel->err_count > 0) {
638 if (time_before(jiffies,
639 tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
640 tunnel->err_count--;
641
Duan Jiong11c21a32014-01-23 14:00:25 +0800642 memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
Pravin B Shelarc5441932013-03-25 14:49:35 +0000643 dst_link_failure(skb);
644 } else
645 tunnel->err_count = 0;
646 }
647
Pravin B Shelard4a71b12013-09-25 09:57:47 -0700648 tos = ip_tunnel_ecn_encap(tos, inner_iph, skb);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000649 ttl = tnl_params->ttl;
650 if (ttl == 0) {
651 if (skb->protocol == htons(ETH_P_IP))
652 ttl = inner_iph->ttl;
653#if IS_ENABLED(CONFIG_IPV6)
654 else if (skb->protocol == htons(ETH_P_IPV6))
655 ttl = ((const struct ipv6hdr *)inner_iph)->hop_limit;
656#endif
657 else
658 ttl = ip4_dst_hoplimit(&rt->dst);
659 }
660
Pravin B Shelar23a36472013-07-02 10:57:33 -0700661 df = tnl_params->frag_off;
662 if (skb->protocol == htons(ETH_P_IP))
663 df |= (inner_iph->frag_off&htons(IP_DF));
664
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -0700665 max_headroom = LL_RESERVED_SPACE(rt->dst.dev) + sizeof(struct iphdr)
666 + rt->dst.header_len;
Steffen Klassert3e08f4a2013-10-01 11:33:59 +0200667 if (max_headroom > dev->needed_headroom)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000668 dev->needed_headroom = max_headroom;
Steffen Klassert3e08f4a2013-10-01 11:33:59 +0200669
670 if (skb_cow_head(skb, dev->needed_headroom)) {
Dmitry Popov586d5fc2014-06-06 04:34:37 +0400671 ip_rt_put(rt);
Steffen Klassert3e08f4a2013-10-01 11:33:59 +0200672 dev->stats.tx_dropped++;
Eric Dumazet3acfa1e2014-01-18 18:27:49 -0800673 kfree_skb(skb);
Steffen Klassert3e08f4a2013-10-01 11:33:59 +0200674 return;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000675 }
676
Eric Dumazetaad88722014-04-15 13:47:15 -0400677 err = iptunnel_xmit(skb->sk, rt, skb, fl4.saddr, fl4.daddr, protocol,
Pravin B Shelard4a71b12013-09-25 09:57:47 -0700678 tos, ttl, df, !net_eq(tunnel->net, dev_net(dev)));
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -0700679 iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000680
Pravin B Shelarc5441932013-03-25 14:49:35 +0000681 return;
682
683#if IS_ENABLED(CONFIG_IPV6)
684tx_error_icmp:
685 dst_link_failure(skb);
686#endif
687tx_error:
688 dev->stats.tx_errors++;
Eric Dumazet3acfa1e2014-01-18 18:27:49 -0800689 kfree_skb(skb);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000690}
691EXPORT_SYMBOL_GPL(ip_tunnel_xmit);
692
693static void ip_tunnel_update(struct ip_tunnel_net *itn,
694 struct ip_tunnel *t,
695 struct net_device *dev,
696 struct ip_tunnel_parm *p,
697 bool set_mtu)
698{
699 ip_tunnel_del(t);
700 t->parms.iph.saddr = p->iph.saddr;
701 t->parms.iph.daddr = p->iph.daddr;
702 t->parms.i_key = p->i_key;
703 t->parms.o_key = p->o_key;
704 if (dev->type != ARPHRD_ETHER) {
705 memcpy(dev->dev_addr, &p->iph.saddr, 4);
706 memcpy(dev->broadcast, &p->iph.daddr, 4);
707 }
708 ip_tunnel_add(itn, t);
709
710 t->parms.iph.ttl = p->iph.ttl;
711 t->parms.iph.tos = p->iph.tos;
712 t->parms.iph.frag_off = p->iph.frag_off;
713
714 if (t->parms.link != p->link) {
715 int mtu;
716
717 t->parms.link = p->link;
718 mtu = ip_tunnel_bind_dev(dev);
719 if (set_mtu)
720 dev->mtu = mtu;
721 }
Nicolas Dichtelcf71d2bc2014-02-20 10:19:31 +0100722 ip_tunnel_dst_reset_all(t);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000723 netdev_state_change(dev);
724}
725
726int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
727{
728 int err = 0;
Nicolas Dichtel8c923ce2014-04-16 11:19:32 +0200729 struct ip_tunnel *t = netdev_priv(dev);
730 struct net *net = t->net;
731 struct ip_tunnel_net *itn = net_generic(net, t->ip_tnl_net_id);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000732
733 BUG_ON(!itn->fb_tunnel_dev);
734 switch (cmd) {
735 case SIOCGETTUNNEL:
Nicolas Dichtel8c923ce2014-04-16 11:19:32 +0200736 if (dev == itn->fb_tunnel_dev) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000737 t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type);
Nicolas Dichtel8c923ce2014-04-16 11:19:32 +0200738 if (t == NULL)
739 t = netdev_priv(dev);
740 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000741 memcpy(p, &t->parms, sizeof(*p));
742 break;
743
744 case SIOCADDTUNNEL:
745 case SIOCCHGTUNNEL:
746 err = -EPERM;
747 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
748 goto done;
749 if (p->iph.ttl)
750 p->iph.frag_off |= htons(IP_DF);
751 if (!(p->i_flags&TUNNEL_KEY))
752 p->i_key = 0;
753 if (!(p->o_flags&TUNNEL_KEY))
754 p->o_key = 0;
755
756 t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type);
757
Florian Westphal6dd3c9e2014-02-14 13:14:39 +0100758 if (!t && (cmd == SIOCADDTUNNEL)) {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000759 t = ip_tunnel_create(net, itn, p);
Florian Westphal6dd3c9e2014-02-14 13:14:39 +0100760 if (IS_ERR(t)) {
761 err = PTR_ERR(t);
762 break;
763 }
764 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000765 if (dev != itn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
766 if (t != NULL) {
767 if (t->dev != dev) {
768 err = -EEXIST;
769 break;
770 }
771 } else {
772 unsigned int nflags = 0;
773
774 if (ipv4_is_multicast(p->iph.daddr))
775 nflags = IFF_BROADCAST;
776 else if (p->iph.daddr)
777 nflags = IFF_POINTOPOINT;
778
779 if ((dev->flags^nflags)&(IFF_POINTOPOINT|IFF_BROADCAST)) {
780 err = -EINVAL;
781 break;
782 }
783
784 t = netdev_priv(dev);
785 }
786 }
787
788 if (t) {
789 err = 0;
790 ip_tunnel_update(itn, t, dev, p, true);
Florian Westphal6dd3c9e2014-02-14 13:14:39 +0100791 } else {
792 err = -ENOENT;
793 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000794 break;
795
796 case SIOCDELTUNNEL:
797 err = -EPERM;
798 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
799 goto done;
800
801 if (dev == itn->fb_tunnel_dev) {
802 err = -ENOENT;
803 t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type);
804 if (t == NULL)
805 goto done;
806 err = -EPERM;
807 if (t == netdev_priv(itn->fb_tunnel_dev))
808 goto done;
809 dev = t->dev;
810 }
811 unregister_netdevice(dev);
812 err = 0;
813 break;
814
815 default:
816 err = -EINVAL;
817 }
818
819done:
820 return err;
821}
822EXPORT_SYMBOL_GPL(ip_tunnel_ioctl);
823
824int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu)
825{
826 struct ip_tunnel *tunnel = netdev_priv(dev);
827 int t_hlen = tunnel->hlen + sizeof(struct iphdr);
828
829 if (new_mtu < 68 ||
830 new_mtu > 0xFFF8 - dev->hard_header_len - t_hlen)
831 return -EINVAL;
832 dev->mtu = new_mtu;
833 return 0;
834}
835EXPORT_SYMBOL_GPL(ip_tunnel_change_mtu);
836
837static void ip_tunnel_dev_free(struct net_device *dev)
838{
839 struct ip_tunnel *tunnel = netdev_priv(dev);
840
841 gro_cells_destroy(&tunnel->gro_cells);
Tom Herbert9a4aa9a2014-01-02 11:48:33 -0800842 free_percpu(tunnel->dst_cache);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000843 free_percpu(dev->tstats);
844 free_netdev(dev);
845}
846
847void ip_tunnel_dellink(struct net_device *dev, struct list_head *head)
848{
Pravin B Shelarc5441932013-03-25 14:49:35 +0000849 struct ip_tunnel *tunnel = netdev_priv(dev);
850 struct ip_tunnel_net *itn;
851
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200852 itn = net_generic(tunnel->net, tunnel->ip_tnl_net_id);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000853
854 if (itn->fb_tunnel_dev != dev) {
855 ip_tunnel_del(netdev_priv(dev));
856 unregister_netdevice_queue(dev, head);
857 }
858}
859EXPORT_SYMBOL_GPL(ip_tunnel_dellink);
860
Eric Dumazetd3b6f612013-06-07 13:26:05 -0700861int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id,
Pravin B Shelarc5441932013-03-25 14:49:35 +0000862 struct rtnl_link_ops *ops, char *devname)
863{
864 struct ip_tunnel_net *itn = net_generic(net, ip_tnl_net_id);
865 struct ip_tunnel_parm parms;
stephen hemminger6261d982013-08-05 22:51:37 -0700866 unsigned int i;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000867
stephen hemminger6261d982013-08-05 22:51:37 -0700868 for (i = 0; i < IP_TNL_HASH_SIZE; i++)
869 INIT_HLIST_HEAD(&itn->tunnels[i]);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000870
871 if (!ops) {
872 itn->fb_tunnel_dev = NULL;
873 return 0;
874 }
stephen hemminger6261d982013-08-05 22:51:37 -0700875
Pravin B Shelarc5441932013-03-25 14:49:35 +0000876 memset(&parms, 0, sizeof(parms));
877 if (devname)
878 strlcpy(parms.name, devname, IFNAMSIZ);
879
880 rtnl_lock();
881 itn->fb_tunnel_dev = __ip_tunnel_create(net, ops, &parms);
Dan Carpenterea857f22013-08-19 10:05:10 +0300882 /* FB netdevice is special: we have one, and only one per netns.
883 * Allowing to move it to another netns is clearly unsafe.
884 */
Steffen Klassert67013282013-10-01 11:34:48 +0200885 if (!IS_ERR(itn->fb_tunnel_dev)) {
Dan Carpenterb4de77a2013-08-23 11:15:37 +0300886 itn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
Steffen Klassert78ff4be2014-05-19 11:36:56 +0200887 itn->fb_tunnel_dev->mtu = ip_tunnel_bind_dev(itn->fb_tunnel_dev);
Steffen Klassert67013282013-10-01 11:34:48 +0200888 ip_tunnel_add(itn, netdev_priv(itn->fb_tunnel_dev));
889 }
Dan Carpenterb4de77a2013-08-23 11:15:37 +0300890 rtnl_unlock();
Pravin B Shelarc5441932013-03-25 14:49:35 +0000891
Sachin Kamat27d79f32014-01-27 12:13:57 +0530892 return PTR_ERR_OR_ZERO(itn->fb_tunnel_dev);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000893}
894EXPORT_SYMBOL_GPL(ip_tunnel_init_net);
895
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200896static void ip_tunnel_destroy(struct ip_tunnel_net *itn, struct list_head *head,
897 struct rtnl_link_ops *ops)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000898{
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200899 struct net *net = dev_net(itn->fb_tunnel_dev);
900 struct net_device *dev, *aux;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000901 int h;
902
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200903 for_each_netdev_safe(net, dev, aux)
904 if (dev->rtnl_link_ops == ops)
905 unregister_netdevice_queue(dev, head);
906
Pravin B Shelarc5441932013-03-25 14:49:35 +0000907 for (h = 0; h < IP_TNL_HASH_SIZE; h++) {
908 struct ip_tunnel *t;
909 struct hlist_node *n;
910 struct hlist_head *thead = &itn->tunnels[h];
911
912 hlist_for_each_entry_safe(t, n, thead, hash_node)
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200913 /* If dev is in the same netns, it has already
914 * been added to the list by the previous loop.
915 */
916 if (!net_eq(dev_net(t->dev), net))
917 unregister_netdevice_queue(t->dev, head);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000918 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000919}
920
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200921void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000922{
923 LIST_HEAD(list);
924
925 rtnl_lock();
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200926 ip_tunnel_destroy(itn, &list, ops);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000927 unregister_netdevice_many(&list);
928 rtnl_unlock();
Pravin B Shelarc5441932013-03-25 14:49:35 +0000929}
930EXPORT_SYMBOL_GPL(ip_tunnel_delete_net);
931
932int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
933 struct ip_tunnel_parm *p)
934{
935 struct ip_tunnel *nt;
936 struct net *net = dev_net(dev);
937 struct ip_tunnel_net *itn;
938 int mtu;
939 int err;
940
941 nt = netdev_priv(dev);
942 itn = net_generic(net, nt->ip_tnl_net_id);
943
944 if (ip_tunnel_find(itn, p, dev->type))
945 return -EEXIST;
946
Nicolas Dichtel5e6700b2013-06-26 16:11:28 +0200947 nt->net = net;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000948 nt->parms = *p;
949 err = register_netdevice(dev);
950 if (err)
951 goto out;
952
953 if (dev->type == ARPHRD_ETHER && !tb[IFLA_ADDRESS])
954 eth_hw_addr_random(dev);
955
956 mtu = ip_tunnel_bind_dev(dev);
957 if (!tb[IFLA_MTU])
958 dev->mtu = mtu;
959
960 ip_tunnel_add(itn, nt);
961
962out:
963 return err;
964}
965EXPORT_SYMBOL_GPL(ip_tunnel_newlink);
966
967int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[],
968 struct ip_tunnel_parm *p)
969{
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200970 struct ip_tunnel *t;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000971 struct ip_tunnel *tunnel = netdev_priv(dev);
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200972 struct net *net = tunnel->net;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000973 struct ip_tunnel_net *itn = net_generic(net, tunnel->ip_tnl_net_id);
974
975 if (dev == itn->fb_tunnel_dev)
976 return -EINVAL;
977
Pravin B Shelarc5441932013-03-25 14:49:35 +0000978 t = ip_tunnel_find(itn, p, dev->type);
979
980 if (t) {
981 if (t->dev != dev)
982 return -EEXIST;
983 } else {
Nicolas Dichtel6c742e72013-08-13 17:51:11 +0200984 t = tunnel;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000985
986 if (dev->type != ARPHRD_ETHER) {
987 unsigned int nflags = 0;
988
989 if (ipv4_is_multicast(p->iph.daddr))
990 nflags = IFF_BROADCAST;
991 else if (p->iph.daddr)
992 nflags = IFF_POINTOPOINT;
993
994 if ((dev->flags ^ nflags) &
995 (IFF_POINTOPOINT | IFF_BROADCAST))
996 return -EINVAL;
997 }
998 }
999
1000 ip_tunnel_update(itn, t, dev, p, !tb[IFLA_MTU]);
1001 return 0;
1002}
1003EXPORT_SYMBOL_GPL(ip_tunnel_changelink);
1004
1005int ip_tunnel_init(struct net_device *dev)
1006{
1007 struct ip_tunnel *tunnel = netdev_priv(dev);
1008 struct iphdr *iph = &tunnel->parms.iph;
WANG Cong1c213bd2014-02-13 11:46:28 -08001009 int err;
Pravin B Shelarc5441932013-03-25 14:49:35 +00001010
1011 dev->destructor = ip_tunnel_dev_free;
WANG Cong1c213bd2014-02-13 11:46:28 -08001012 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
Pravin B Shelarc5441932013-03-25 14:49:35 +00001013 if (!dev->tstats)
1014 return -ENOMEM;
1015
Tom Herbert9a4aa9a2014-01-02 11:48:33 -08001016 tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst);
1017 if (!tunnel->dst_cache) {
1018 free_percpu(dev->tstats);
1019 return -ENOMEM;
1020 }
1021
Pravin B Shelarc5441932013-03-25 14:49:35 +00001022 err = gro_cells_init(&tunnel->gro_cells, dev);
1023 if (err) {
Tom Herbert9a4aa9a2014-01-02 11:48:33 -08001024 free_percpu(tunnel->dst_cache);
Pravin B Shelarc5441932013-03-25 14:49:35 +00001025 free_percpu(dev->tstats);
1026 return err;
1027 }
1028
1029 tunnel->dev = dev;
Nicolas Dichtel6c742e72013-08-13 17:51:11 +02001030 tunnel->net = dev_net(dev);
Pravin B Shelarc5441932013-03-25 14:49:35 +00001031 strcpy(tunnel->parms.name, dev->name);
1032 iph->version = 4;
1033 iph->ihl = 5;
1034
1035 return 0;
1036}
1037EXPORT_SYMBOL_GPL(ip_tunnel_init);
1038
1039void ip_tunnel_uninit(struct net_device *dev)
1040{
Pravin B Shelarc5441932013-03-25 14:49:35 +00001041 struct ip_tunnel *tunnel = netdev_priv(dev);
Nicolas Dichtel6c742e72013-08-13 17:51:11 +02001042 struct net *net = tunnel->net;
Pravin B Shelarc5441932013-03-25 14:49:35 +00001043 struct ip_tunnel_net *itn;
1044
1045 itn = net_generic(net, tunnel->ip_tnl_net_id);
1046 /* fb_tunnel_dev will be unregisted in net-exit call. */
1047 if (itn->fb_tunnel_dev != dev)
1048 ip_tunnel_del(netdev_priv(dev));
Tom Herbert7d442fa2014-01-02 11:48:26 -08001049
Nicolas Dichtelcf71d2bc2014-02-20 10:19:31 +01001050 ip_tunnel_dst_reset_all(tunnel);
Pravin B Shelarc5441932013-03-25 14:49:35 +00001051}
1052EXPORT_SYMBOL_GPL(ip_tunnel_uninit);
1053
1054/* Do least required initialization, rest of init is done in tunnel_init call */
1055void ip_tunnel_setup(struct net_device *dev, int net_id)
1056{
1057 struct ip_tunnel *tunnel = netdev_priv(dev);
1058 tunnel->ip_tnl_net_id = net_id;
1059}
1060EXPORT_SYMBOL_GPL(ip_tunnel_setup);
1061
1062MODULE_LICENSE("GPL");