Commit | Line | Data |
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c5441932 PS |
1 | /* |
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> | |
27d79f3b | 43 | #include <linux/err.h> |
c5441932 PS |
44 | |
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 | ||
967680e0 | 65 | static unsigned int ip_tunnel_hash(__be32 key, __be32 remote) |
c5441932 PS |
66 | { |
67 | return hash_32((__force u32)key ^ (__force u32)remote, | |
68 | IP_TNL_HASH_BITS); | |
69 | } | |
70 | ||
6c7e7610 | 71 | static void __tunnel_dst_set(struct ip_tunnel_dst *idst, |
95cb5745 | 72 | struct dst_entry *dst, __be32 saddr) |
7d442fab TH |
73 | { |
74 | struct dst_entry *old_dst; | |
75 | ||
f8864972 | 76 | dst_clone(dst); |
6c7e7610 | 77 | old_dst = xchg((__force struct dst_entry **)&idst->dst, dst); |
7d442fab | 78 | dst_release(old_dst); |
95cb5745 | 79 | idst->saddr = saddr; |
7d442fab TH |
80 | } |
81 | ||
95cb5745 DP |
82 | static void tunnel_dst_set(struct ip_tunnel *t, |
83 | struct dst_entry *dst, __be32 saddr) | |
7d442fab | 84 | { |
95cb5745 | 85 | __tunnel_dst_set(this_cpu_ptr(t->dst_cache), dst, saddr); |
7d442fab TH |
86 | } |
87 | ||
6c7e7610 | 88 | static void tunnel_dst_reset(struct ip_tunnel *t) |
7d442fab | 89 | { |
95cb5745 | 90 | tunnel_dst_set(t, NULL, 0); |
7d442fab TH |
91 | } |
92 | ||
cf71d2bc | 93 | void ip_tunnel_dst_reset_all(struct ip_tunnel *t) |
9a4aa9af TH |
94 | { |
95 | int i; | |
96 | ||
97 | for_each_possible_cpu(i) | |
95cb5745 | 98 | __tunnel_dst_set(per_cpu_ptr(t->dst_cache, i), NULL, 0); |
9a4aa9af | 99 | } |
cf71d2bc | 100 | EXPORT_SYMBOL(ip_tunnel_dst_reset_all); |
9a4aa9af | 101 | |
95cb5745 DP |
102 | static struct rtable *tunnel_rtable_get(struct ip_tunnel *t, |
103 | u32 cookie, __be32 *saddr) | |
7d442fab | 104 | { |
95cb5745 | 105 | struct ip_tunnel_dst *idst; |
7d442fab TH |
106 | struct dst_entry *dst; |
107 | ||
108 | rcu_read_lock(); | |
95cb5745 DP |
109 | idst = this_cpu_ptr(t->dst_cache); |
110 | dst = rcu_dereference(idst->dst); | |
f8864972 ED |
111 | if (dst && !atomic_inc_not_zero(&dst->__refcnt)) |
112 | dst = NULL; | |
b045d37b | 113 | if (dst) { |
95cb5745 DP |
114 | if (!dst->obsolete || dst->ops->check(dst, cookie)) { |
115 | *saddr = idst->saddr; | |
116 | } else { | |
b045d37b | 117 | tunnel_dst_reset(t); |
f8864972 ED |
118 | dst_release(dst); |
119 | dst = NULL; | |
b045d37b | 120 | } |
7d442fab | 121 | } |
b045d37b ED |
122 | rcu_read_unlock(); |
123 | return (struct rtable *)dst; | |
7d442fab TH |
124 | } |
125 | ||
c5441932 PS |
126 | static bool ip_tunnel_key_match(const struct ip_tunnel_parm *p, |
127 | __be16 flags, __be32 key) | |
128 | { | |
129 | if (p->i_flags & TUNNEL_KEY) { | |
130 | if (flags & TUNNEL_KEY) | |
131 | return key == p->i_key; | |
132 | else | |
133 | /* key expected, none present */ | |
134 | return false; | |
135 | } else | |
136 | return !(flags & TUNNEL_KEY); | |
137 | } | |
138 | ||
139 | /* Fallback tunnel: no source, no destination, no key, no options | |
140 | ||
141 | Tunnel hash table: | |
142 | We require exact key match i.e. if a key is present in packet | |
143 | it will match only tunnel with the same key; if it is not present, | |
144 | it will match only keyless tunnel. | |
145 | ||
146 | All keysless packets, if not matched configured keyless tunnels | |
147 | will match fallback tunnel. | |
148 | Given src, dst and key, find appropriate for input tunnel. | |
149 | */ | |
150 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, | |
151 | int link, __be16 flags, | |
152 | __be32 remote, __be32 local, | |
153 | __be32 key) | |
154 | { | |
155 | unsigned int hash; | |
156 | struct ip_tunnel *t, *cand = NULL; | |
157 | struct hlist_head *head; | |
158 | ||
967680e0 | 159 | hash = ip_tunnel_hash(key, remote); |
c5441932 PS |
160 | head = &itn->tunnels[hash]; |
161 | ||
162 | hlist_for_each_entry_rcu(t, head, hash_node) { | |
163 | if (local != t->parms.iph.saddr || | |
164 | remote != t->parms.iph.daddr || | |
165 | !(t->dev->flags & IFF_UP)) | |
166 | continue; | |
167 | ||
168 | if (!ip_tunnel_key_match(&t->parms, flags, key)) | |
169 | continue; | |
170 | ||
171 | if (t->parms.link == link) | |
172 | return t; | |
173 | else | |
174 | cand = t; | |
175 | } | |
176 | ||
177 | hlist_for_each_entry_rcu(t, head, hash_node) { | |
178 | if (remote != t->parms.iph.daddr || | |
e0056593 | 179 | t->parms.iph.saddr != 0 || |
c5441932 PS |
180 | !(t->dev->flags & IFF_UP)) |
181 | continue; | |
182 | ||
183 | if (!ip_tunnel_key_match(&t->parms, flags, key)) | |
184 | continue; | |
185 | ||
186 | if (t->parms.link == link) | |
187 | return t; | |
188 | else if (!cand) | |
189 | cand = t; | |
190 | } | |
191 | ||
967680e0 | 192 | hash = ip_tunnel_hash(key, 0); |
c5441932 PS |
193 | head = &itn->tunnels[hash]; |
194 | ||
195 | hlist_for_each_entry_rcu(t, head, hash_node) { | |
e0056593 DP |
196 | if ((local != t->parms.iph.saddr || t->parms.iph.daddr != 0) && |
197 | (local != t->parms.iph.daddr || !ipv4_is_multicast(local))) | |
198 | continue; | |
199 | ||
200 | if (!(t->dev->flags & IFF_UP)) | |
c5441932 PS |
201 | continue; |
202 | ||
203 | if (!ip_tunnel_key_match(&t->parms, flags, key)) | |
204 | continue; | |
205 | ||
206 | if (t->parms.link == link) | |
207 | return t; | |
208 | else if (!cand) | |
209 | cand = t; | |
210 | } | |
211 | ||
212 | if (flags & TUNNEL_NO_KEY) | |
213 | goto skip_key_lookup; | |
214 | ||
215 | hlist_for_each_entry_rcu(t, head, hash_node) { | |
216 | if (t->parms.i_key != key || | |
e0056593 DP |
217 | t->parms.iph.saddr != 0 || |
218 | t->parms.iph.daddr != 0 || | |
c5441932 PS |
219 | !(t->dev->flags & IFF_UP)) |
220 | continue; | |
221 | ||
222 | if (t->parms.link == link) | |
223 | return t; | |
224 | else if (!cand) | |
225 | cand = t; | |
226 | } | |
227 | ||
228 | skip_key_lookup: | |
229 | if (cand) | |
230 | return cand; | |
231 | ||
232 | if (itn->fb_tunnel_dev && itn->fb_tunnel_dev->flags & IFF_UP) | |
233 | return netdev_priv(itn->fb_tunnel_dev); | |
234 | ||
235 | ||
236 | return NULL; | |
237 | } | |
238 | EXPORT_SYMBOL_GPL(ip_tunnel_lookup); | |
239 | ||
240 | static struct hlist_head *ip_bucket(struct ip_tunnel_net *itn, | |
241 | struct ip_tunnel_parm *parms) | |
242 | { | |
243 | unsigned int h; | |
244 | __be32 remote; | |
6d608f06 | 245 | __be32 i_key = parms->i_key; |
c5441932 PS |
246 | |
247 | if (parms->iph.daddr && !ipv4_is_multicast(parms->iph.daddr)) | |
248 | remote = parms->iph.daddr; | |
249 | else | |
250 | remote = 0; | |
251 | ||
6d608f06 SK |
252 | if (!(parms->i_flags & TUNNEL_KEY) && (parms->i_flags & VTI_ISVTI)) |
253 | i_key = 0; | |
254 | ||
255 | h = ip_tunnel_hash(i_key, remote); | |
c5441932 PS |
256 | return &itn->tunnels[h]; |
257 | } | |
258 | ||
259 | static void ip_tunnel_add(struct ip_tunnel_net *itn, struct ip_tunnel *t) | |
260 | { | |
261 | struct hlist_head *head = ip_bucket(itn, &t->parms); | |
262 | ||
263 | hlist_add_head_rcu(&t->hash_node, head); | |
264 | } | |
265 | ||
266 | static void ip_tunnel_del(struct ip_tunnel *t) | |
267 | { | |
268 | hlist_del_init_rcu(&t->hash_node); | |
269 | } | |
270 | ||
271 | static struct ip_tunnel *ip_tunnel_find(struct ip_tunnel_net *itn, | |
272 | struct ip_tunnel_parm *parms, | |
273 | int type) | |
274 | { | |
275 | __be32 remote = parms->iph.daddr; | |
276 | __be32 local = parms->iph.saddr; | |
277 | __be32 key = parms->i_key; | |
5ce54af1 | 278 | __be16 flags = parms->i_flags; |
c5441932 PS |
279 | int link = parms->link; |
280 | struct ip_tunnel *t = NULL; | |
281 | struct hlist_head *head = ip_bucket(itn, parms); | |
282 | ||
283 | hlist_for_each_entry_rcu(t, head, hash_node) { | |
284 | if (local == t->parms.iph.saddr && | |
285 | remote == t->parms.iph.daddr && | |
c5441932 | 286 | link == t->parms.link && |
5ce54af1 DP |
287 | type == t->dev->type && |
288 | ip_tunnel_key_match(&t->parms, flags, key)) | |
c5441932 PS |
289 | break; |
290 | } | |
291 | return t; | |
292 | } | |
293 | ||
294 | static struct net_device *__ip_tunnel_create(struct net *net, | |
295 | const struct rtnl_link_ops *ops, | |
296 | struct ip_tunnel_parm *parms) | |
297 | { | |
298 | int err; | |
299 | struct ip_tunnel *tunnel; | |
300 | struct net_device *dev; | |
301 | char name[IFNAMSIZ]; | |
302 | ||
303 | if (parms->name[0]) | |
304 | strlcpy(name, parms->name, IFNAMSIZ); | |
305 | else { | |
54a5d382 | 306 | if (strlen(ops->kind) > (IFNAMSIZ - 3)) { |
c5441932 PS |
307 | err = -E2BIG; |
308 | goto failed; | |
309 | } | |
310 | strlcpy(name, ops->kind, IFNAMSIZ); | |
311 | strncat(name, "%d", 2); | |
312 | } | |
313 | ||
314 | ASSERT_RTNL(); | |
c835a677 | 315 | dev = alloc_netdev(ops->priv_size, name, NET_NAME_UNKNOWN, ops->setup); |
c5441932 PS |
316 | if (!dev) { |
317 | err = -ENOMEM; | |
318 | goto failed; | |
319 | } | |
320 | dev_net_set(dev, net); | |
321 | ||
322 | dev->rtnl_link_ops = ops; | |
323 | ||
324 | tunnel = netdev_priv(dev); | |
325 | tunnel->parms = *parms; | |
5e6700b3 | 326 | tunnel->net = net; |
c5441932 PS |
327 | |
328 | err = register_netdevice(dev); | |
329 | if (err) | |
330 | goto failed_free; | |
331 | ||
332 | return dev; | |
333 | ||
334 | failed_free: | |
335 | free_netdev(dev); | |
336 | failed: | |
337 | return ERR_PTR(err); | |
338 | } | |
339 | ||
7d442fab TH |
340 | static inline void init_tunnel_flow(struct flowi4 *fl4, |
341 | int proto, | |
342 | __be32 daddr, __be32 saddr, | |
343 | __be32 key, __u8 tos, int oif) | |
c5441932 PS |
344 | { |
345 | memset(fl4, 0, sizeof(*fl4)); | |
346 | fl4->flowi4_oif = oif; | |
347 | fl4->daddr = daddr; | |
348 | fl4->saddr = saddr; | |
349 | fl4->flowi4_tos = tos; | |
350 | fl4->flowi4_proto = proto; | |
351 | fl4->fl4_gre_key = key; | |
c5441932 PS |
352 | } |
353 | ||
354 | static int ip_tunnel_bind_dev(struct net_device *dev) | |
355 | { | |
356 | struct net_device *tdev = NULL; | |
357 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
358 | const struct iphdr *iph; | |
359 | int hlen = LL_MAX_HEADER; | |
360 | int mtu = ETH_DATA_LEN; | |
361 | int t_hlen = tunnel->hlen + sizeof(struct iphdr); | |
362 | ||
363 | iph = &tunnel->parms.iph; | |
364 | ||
365 | /* Guess output device to choose reasonable mtu and needed_headroom */ | |
366 | if (iph->daddr) { | |
367 | struct flowi4 fl4; | |
368 | struct rtable *rt; | |
369 | ||
7d442fab TH |
370 | init_tunnel_flow(&fl4, iph->protocol, iph->daddr, |
371 | iph->saddr, tunnel->parms.o_key, | |
372 | RT_TOS(iph->tos), tunnel->parms.link); | |
373 | rt = ip_route_output_key(tunnel->net, &fl4); | |
374 | ||
c5441932 PS |
375 | if (!IS_ERR(rt)) { |
376 | tdev = rt->dst.dev; | |
95cb5745 | 377 | tunnel_dst_set(tunnel, &rt->dst, fl4.saddr); |
c5441932 PS |
378 | ip_rt_put(rt); |
379 | } | |
380 | if (dev->type != ARPHRD_ETHER) | |
381 | dev->flags |= IFF_POINTOPOINT; | |
382 | } | |
383 | ||
384 | if (!tdev && tunnel->parms.link) | |
6c742e71 | 385 | tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link); |
c5441932 PS |
386 | |
387 | if (tdev) { | |
388 | hlen = tdev->hard_header_len + tdev->needed_headroom; | |
389 | mtu = tdev->mtu; | |
390 | } | |
391 | dev->iflink = tunnel->parms.link; | |
392 | ||
393 | dev->needed_headroom = t_hlen + hlen; | |
394 | mtu -= (dev->hard_header_len + t_hlen); | |
395 | ||
396 | if (mtu < 68) | |
397 | mtu = 68; | |
398 | ||
399 | return mtu; | |
400 | } | |
401 | ||
402 | static struct ip_tunnel *ip_tunnel_create(struct net *net, | |
403 | struct ip_tunnel_net *itn, | |
404 | struct ip_tunnel_parm *parms) | |
405 | { | |
4929fd8c | 406 | struct ip_tunnel *nt; |
c5441932 PS |
407 | struct net_device *dev; |
408 | ||
409 | BUG_ON(!itn->fb_tunnel_dev); | |
c5441932 PS |
410 | dev = __ip_tunnel_create(net, itn->fb_tunnel_dev->rtnl_link_ops, parms); |
411 | if (IS_ERR(dev)) | |
6dd3c9ec | 412 | return ERR_CAST(dev); |
c5441932 PS |
413 | |
414 | dev->mtu = ip_tunnel_bind_dev(dev); | |
415 | ||
416 | nt = netdev_priv(dev); | |
417 | ip_tunnel_add(itn, nt); | |
418 | return nt; | |
419 | } | |
420 | ||
421 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, | |
422 | const struct tnl_ptk_info *tpi, bool log_ecn_error) | |
423 | { | |
8f84985f | 424 | struct pcpu_sw_netstats *tstats; |
c5441932 PS |
425 | const struct iphdr *iph = ip_hdr(skb); |
426 | int err; | |
427 | ||
c5441932 PS |
428 | #ifdef CONFIG_NET_IPGRE_BROADCAST |
429 | if (ipv4_is_multicast(iph->daddr)) { | |
c5441932 PS |
430 | tunnel->dev->stats.multicast++; |
431 | skb->pkt_type = PACKET_BROADCAST; | |
432 | } | |
433 | #endif | |
434 | ||
435 | if ((!(tpi->flags&TUNNEL_CSUM) && (tunnel->parms.i_flags&TUNNEL_CSUM)) || | |
436 | ((tpi->flags&TUNNEL_CSUM) && !(tunnel->parms.i_flags&TUNNEL_CSUM))) { | |
437 | tunnel->dev->stats.rx_crc_errors++; | |
438 | tunnel->dev->stats.rx_errors++; | |
439 | goto drop; | |
440 | } | |
441 | ||
442 | if (tunnel->parms.i_flags&TUNNEL_SEQ) { | |
443 | if (!(tpi->flags&TUNNEL_SEQ) || | |
444 | (tunnel->i_seqno && (s32)(ntohl(tpi->seq) - tunnel->i_seqno) < 0)) { | |
445 | tunnel->dev->stats.rx_fifo_errors++; | |
446 | tunnel->dev->stats.rx_errors++; | |
447 | goto drop; | |
448 | } | |
449 | tunnel->i_seqno = ntohl(tpi->seq) + 1; | |
450 | } | |
451 | ||
e96f2e7c YC |
452 | skb_reset_network_header(skb); |
453 | ||
c5441932 PS |
454 | err = IP_ECN_decapsulate(iph, skb); |
455 | if (unlikely(err)) { | |
456 | if (log_ecn_error) | |
457 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
458 | &iph->saddr, iph->tos); | |
459 | if (err > 1) { | |
460 | ++tunnel->dev->stats.rx_frame_errors; | |
461 | ++tunnel->dev->stats.rx_errors; | |
462 | goto drop; | |
463 | } | |
464 | } | |
465 | ||
466 | tstats = this_cpu_ptr(tunnel->dev->tstats); | |
467 | u64_stats_update_begin(&tstats->syncp); | |
468 | tstats->rx_packets++; | |
469 | tstats->rx_bytes += skb->len; | |
470 | u64_stats_update_end(&tstats->syncp); | |
471 | ||
81b9eab5 AS |
472 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev))); |
473 | ||
3d7b46cd PS |
474 | if (tunnel->dev->type == ARPHRD_ETHER) { |
475 | skb->protocol = eth_type_trans(skb, tunnel->dev); | |
476 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
477 | } else { | |
478 | skb->dev = tunnel->dev; | |
479 | } | |
64261f23 | 480 | |
c5441932 PS |
481 | gro_cells_receive(&tunnel->gro_cells, skb); |
482 | return 0; | |
483 | ||
484 | drop: | |
485 | kfree_skb(skb); | |
486 | return 0; | |
487 | } | |
488 | EXPORT_SYMBOL_GPL(ip_tunnel_rcv); | |
489 | ||
23a3647b PS |
490 | static int tnl_update_pmtu(struct net_device *dev, struct sk_buff *skb, |
491 | struct rtable *rt, __be16 df) | |
492 | { | |
493 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
8c91e162 | 494 | int pkt_size = skb->len - tunnel->hlen - dev->hard_header_len; |
23a3647b PS |
495 | int mtu; |
496 | ||
497 | if (df) | |
498 | mtu = dst_mtu(&rt->dst) - dev->hard_header_len | |
499 | - sizeof(struct iphdr) - tunnel->hlen; | |
500 | else | |
501 | mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu; | |
502 | ||
503 | if (skb_dst(skb)) | |
504 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); | |
505 | ||
506 | if (skb->protocol == htons(ETH_P_IP)) { | |
507 | if (!skb_is_gso(skb) && | |
508 | (df & htons(IP_DF)) && mtu < pkt_size) { | |
509 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | |
510 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); | |
511 | return -E2BIG; | |
512 | } | |
513 | } | |
514 | #if IS_ENABLED(CONFIG_IPV6) | |
515 | else if (skb->protocol == htons(ETH_P_IPV6)) { | |
516 | struct rt6_info *rt6 = (struct rt6_info *)skb_dst(skb); | |
517 | ||
518 | if (rt6 && mtu < dst_mtu(skb_dst(skb)) && | |
519 | mtu >= IPV6_MIN_MTU) { | |
520 | if ((tunnel->parms.iph.daddr && | |
521 | !ipv4_is_multicast(tunnel->parms.iph.daddr)) || | |
522 | rt6->rt6i_dst.plen == 128) { | |
523 | rt6->rt6i_flags |= RTF_MODIFIED; | |
524 | dst_metric_set(skb_dst(skb), RTAX_MTU, mtu); | |
525 | } | |
526 | } | |
527 | ||
528 | if (!skb_is_gso(skb) && mtu >= IPV6_MIN_MTU && | |
529 | mtu < pkt_size) { | |
530 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); | |
531 | return -E2BIG; | |
532 | } | |
533 | } | |
534 | #endif | |
535 | return 0; | |
536 | } | |
537 | ||
c5441932 | 538 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
bf3d6a8f | 539 | const struct iphdr *tnl_params, const u8 protocol) |
c5441932 PS |
540 | { |
541 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
542 | const struct iphdr *inner_iph; | |
c5441932 PS |
543 | struct flowi4 fl4; |
544 | u8 tos, ttl; | |
545 | __be16 df; | |
b045d37b | 546 | struct rtable *rt; /* Route to the other host */ |
c5441932 PS |
547 | unsigned int max_headroom; /* The extra header space needed */ |
548 | __be32 dst; | |
0e6fbc5b | 549 | int err; |
22fb22ea | 550 | bool connected; |
c5441932 PS |
551 | |
552 | inner_iph = (const struct iphdr *)skb_inner_network_header(skb); | |
22fb22ea | 553 | connected = (tunnel->parms.iph.daddr != 0); |
c5441932 PS |
554 | |
555 | dst = tnl_params->daddr; | |
556 | if (dst == 0) { | |
557 | /* NBMA tunnel */ | |
558 | ||
559 | if (skb_dst(skb) == NULL) { | |
560 | dev->stats.tx_fifo_errors++; | |
561 | goto tx_error; | |
562 | } | |
563 | ||
564 | if (skb->protocol == htons(ETH_P_IP)) { | |
565 | rt = skb_rtable(skb); | |
566 | dst = rt_nexthop(rt, inner_iph->daddr); | |
567 | } | |
568 | #if IS_ENABLED(CONFIG_IPV6) | |
569 | else if (skb->protocol == htons(ETH_P_IPV6)) { | |
570 | const struct in6_addr *addr6; | |
571 | struct neighbour *neigh; | |
572 | bool do_tx_error_icmp; | |
573 | int addr_type; | |
574 | ||
575 | neigh = dst_neigh_lookup(skb_dst(skb), | |
576 | &ipv6_hdr(skb)->daddr); | |
577 | if (neigh == NULL) | |
578 | goto tx_error; | |
579 | ||
580 | addr6 = (const struct in6_addr *)&neigh->primary_key; | |
581 | addr_type = ipv6_addr_type(addr6); | |
582 | ||
583 | if (addr_type == IPV6_ADDR_ANY) { | |
584 | addr6 = &ipv6_hdr(skb)->daddr; | |
585 | addr_type = ipv6_addr_type(addr6); | |
586 | } | |
587 | ||
588 | if ((addr_type & IPV6_ADDR_COMPATv4) == 0) | |
589 | do_tx_error_icmp = true; | |
590 | else { | |
591 | do_tx_error_icmp = false; | |
592 | dst = addr6->s6_addr32[3]; | |
593 | } | |
594 | neigh_release(neigh); | |
595 | if (do_tx_error_icmp) | |
596 | goto tx_error_icmp; | |
597 | } | |
598 | #endif | |
599 | else | |
600 | goto tx_error; | |
7d442fab TH |
601 | |
602 | connected = false; | |
c5441932 PS |
603 | } |
604 | ||
605 | tos = tnl_params->tos; | |
606 | if (tos & 0x1) { | |
607 | tos &= ~0x1; | |
7d442fab | 608 | if (skb->protocol == htons(ETH_P_IP)) { |
c5441932 | 609 | tos = inner_iph->tos; |
7d442fab TH |
610 | connected = false; |
611 | } else if (skb->protocol == htons(ETH_P_IPV6)) { | |
c5441932 | 612 | tos = ipv6_get_dsfield((const struct ipv6hdr *)inner_iph); |
7d442fab TH |
613 | connected = false; |
614 | } | |
c5441932 PS |
615 | } |
616 | ||
7d442fab TH |
617 | init_tunnel_flow(&fl4, protocol, dst, tnl_params->saddr, |
618 | tunnel->parms.o_key, RT_TOS(tos), tunnel->parms.link); | |
619 | ||
95cb5745 | 620 | rt = connected ? tunnel_rtable_get(tunnel, 0, &fl4.saddr) : NULL; |
7d442fab TH |
621 | |
622 | if (!rt) { | |
623 | rt = ip_route_output_key(tunnel->net, &fl4); | |
624 | ||
625 | if (IS_ERR(rt)) { | |
626 | dev->stats.tx_carrier_errors++; | |
627 | goto tx_error; | |
628 | } | |
629 | if (connected) | |
95cb5745 | 630 | tunnel_dst_set(tunnel, &rt->dst, fl4.saddr); |
c5441932 | 631 | } |
7d442fab | 632 | |
0e6fbc5b | 633 | if (rt->dst.dev == dev) { |
c5441932 PS |
634 | ip_rt_put(rt); |
635 | dev->stats.collisions++; | |
636 | goto tx_error; | |
637 | } | |
c5441932 | 638 | |
23a3647b PS |
639 | if (tnl_update_pmtu(dev, skb, rt, tnl_params->frag_off)) { |
640 | ip_rt_put(rt); | |
641 | goto tx_error; | |
c5441932 | 642 | } |
c5441932 PS |
643 | |
644 | if (tunnel->err_count > 0) { | |
645 | if (time_before(jiffies, | |
646 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { | |
647 | tunnel->err_count--; | |
648 | ||
11c21a30 | 649 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); |
c5441932 PS |
650 | dst_link_failure(skb); |
651 | } else | |
652 | tunnel->err_count = 0; | |
653 | } | |
654 | ||
d4a71b15 | 655 | tos = ip_tunnel_ecn_encap(tos, inner_iph, skb); |
c5441932 PS |
656 | ttl = tnl_params->ttl; |
657 | if (ttl == 0) { | |
658 | if (skb->protocol == htons(ETH_P_IP)) | |
659 | ttl = inner_iph->ttl; | |
660 | #if IS_ENABLED(CONFIG_IPV6) | |
661 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
662 | ttl = ((const struct ipv6hdr *)inner_iph)->hop_limit; | |
663 | #endif | |
664 | else | |
665 | ttl = ip4_dst_hoplimit(&rt->dst); | |
666 | } | |
667 | ||
23a3647b PS |
668 | df = tnl_params->frag_off; |
669 | if (skb->protocol == htons(ETH_P_IP)) | |
670 | df |= (inner_iph->frag_off&htons(IP_DF)); | |
671 | ||
0e6fbc5b PS |
672 | max_headroom = LL_RESERVED_SPACE(rt->dst.dev) + sizeof(struct iphdr) |
673 | + rt->dst.header_len; | |
3e08f4a7 | 674 | if (max_headroom > dev->needed_headroom) |
c5441932 | 675 | dev->needed_headroom = max_headroom; |
3e08f4a7 SK |
676 | |
677 | if (skb_cow_head(skb, dev->needed_headroom)) { | |
586d5fc8 | 678 | ip_rt_put(rt); |
3e08f4a7 | 679 | dev->stats.tx_dropped++; |
3acfa1e7 | 680 | kfree_skb(skb); |
3e08f4a7 | 681 | return; |
c5441932 PS |
682 | } |
683 | ||
aad88724 | 684 | err = iptunnel_xmit(skb->sk, rt, skb, fl4.saddr, fl4.daddr, protocol, |
d4a71b15 | 685 | tos, ttl, df, !net_eq(tunnel->net, dev_net(dev))); |
0e6fbc5b | 686 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
c5441932 | 687 | |
c5441932 PS |
688 | return; |
689 | ||
690 | #if IS_ENABLED(CONFIG_IPV6) | |
691 | tx_error_icmp: | |
692 | dst_link_failure(skb); | |
693 | #endif | |
694 | tx_error: | |
695 | dev->stats.tx_errors++; | |
3acfa1e7 | 696 | kfree_skb(skb); |
c5441932 PS |
697 | } |
698 | EXPORT_SYMBOL_GPL(ip_tunnel_xmit); | |
699 | ||
700 | static void ip_tunnel_update(struct ip_tunnel_net *itn, | |
701 | struct ip_tunnel *t, | |
702 | struct net_device *dev, | |
703 | struct ip_tunnel_parm *p, | |
704 | bool set_mtu) | |
705 | { | |
706 | ip_tunnel_del(t); | |
707 | t->parms.iph.saddr = p->iph.saddr; | |
708 | t->parms.iph.daddr = p->iph.daddr; | |
709 | t->parms.i_key = p->i_key; | |
710 | t->parms.o_key = p->o_key; | |
711 | if (dev->type != ARPHRD_ETHER) { | |
712 | memcpy(dev->dev_addr, &p->iph.saddr, 4); | |
713 | memcpy(dev->broadcast, &p->iph.daddr, 4); | |
714 | } | |
715 | ip_tunnel_add(itn, t); | |
716 | ||
717 | t->parms.iph.ttl = p->iph.ttl; | |
718 | t->parms.iph.tos = p->iph.tos; | |
719 | t->parms.iph.frag_off = p->iph.frag_off; | |
720 | ||
721 | if (t->parms.link != p->link) { | |
722 | int mtu; | |
723 | ||
724 | t->parms.link = p->link; | |
725 | mtu = ip_tunnel_bind_dev(dev); | |
726 | if (set_mtu) | |
727 | dev->mtu = mtu; | |
728 | } | |
cf71d2bc | 729 | ip_tunnel_dst_reset_all(t); |
c5441932 PS |
730 | netdev_state_change(dev); |
731 | } | |
732 | ||
733 | int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd) | |
734 | { | |
735 | int err = 0; | |
8c923ce2 ND |
736 | struct ip_tunnel *t = netdev_priv(dev); |
737 | struct net *net = t->net; | |
738 | struct ip_tunnel_net *itn = net_generic(net, t->ip_tnl_net_id); | |
c5441932 PS |
739 | |
740 | BUG_ON(!itn->fb_tunnel_dev); | |
741 | switch (cmd) { | |
742 | case SIOCGETTUNNEL: | |
8c923ce2 | 743 | if (dev == itn->fb_tunnel_dev) { |
c5441932 | 744 | t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type); |
8c923ce2 ND |
745 | if (t == NULL) |
746 | t = netdev_priv(dev); | |
747 | } | |
c5441932 PS |
748 | memcpy(p, &t->parms, sizeof(*p)); |
749 | break; | |
750 | ||
751 | case SIOCADDTUNNEL: | |
752 | case SIOCCHGTUNNEL: | |
753 | err = -EPERM; | |
754 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
755 | goto done; | |
756 | if (p->iph.ttl) | |
757 | p->iph.frag_off |= htons(IP_DF); | |
7c8e6b9c DP |
758 | if (!(p->i_flags & VTI_ISVTI)) { |
759 | if (!(p->i_flags & TUNNEL_KEY)) | |
760 | p->i_key = 0; | |
761 | if (!(p->o_flags & TUNNEL_KEY)) | |
762 | p->o_key = 0; | |
763 | } | |
c5441932 PS |
764 | |
765 | t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type); | |
766 | ||
6dd3c9ec | 767 | if (!t && (cmd == SIOCADDTUNNEL)) { |
c5441932 | 768 | t = ip_tunnel_create(net, itn, p); |
ee30ef4d DJ |
769 | err = PTR_ERR_OR_ZERO(t); |
770 | break; | |
6dd3c9ec | 771 | } |
c5441932 PS |
772 | if (dev != itn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
773 | if (t != NULL) { | |
774 | if (t->dev != dev) { | |
775 | err = -EEXIST; | |
776 | break; | |
777 | } | |
778 | } else { | |
779 | unsigned int nflags = 0; | |
780 | ||
781 | if (ipv4_is_multicast(p->iph.daddr)) | |
782 | nflags = IFF_BROADCAST; | |
783 | else if (p->iph.daddr) | |
784 | nflags = IFF_POINTOPOINT; | |
785 | ||
786 | if ((dev->flags^nflags)&(IFF_POINTOPOINT|IFF_BROADCAST)) { | |
787 | err = -EINVAL; | |
788 | break; | |
789 | } | |
790 | ||
791 | t = netdev_priv(dev); | |
792 | } | |
793 | } | |
794 | ||
795 | if (t) { | |
796 | err = 0; | |
797 | ip_tunnel_update(itn, t, dev, p, true); | |
6dd3c9ec FW |
798 | } else { |
799 | err = -ENOENT; | |
800 | } | |
c5441932 PS |
801 | break; |
802 | ||
803 | case SIOCDELTUNNEL: | |
804 | err = -EPERM; | |
805 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
806 | goto done; | |
807 | ||
808 | if (dev == itn->fb_tunnel_dev) { | |
809 | err = -ENOENT; | |
810 | t = ip_tunnel_find(itn, p, itn->fb_tunnel_dev->type); | |
811 | if (t == NULL) | |
812 | goto done; | |
813 | err = -EPERM; | |
814 | if (t == netdev_priv(itn->fb_tunnel_dev)) | |
815 | goto done; | |
816 | dev = t->dev; | |
817 | } | |
818 | unregister_netdevice(dev); | |
819 | err = 0; | |
820 | break; | |
821 | ||
822 | default: | |
823 | err = -EINVAL; | |
824 | } | |
825 | ||
826 | done: | |
827 | return err; | |
828 | } | |
829 | EXPORT_SYMBOL_GPL(ip_tunnel_ioctl); | |
830 | ||
831 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu) | |
832 | { | |
833 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
834 | int t_hlen = tunnel->hlen + sizeof(struct iphdr); | |
835 | ||
836 | if (new_mtu < 68 || | |
837 | new_mtu > 0xFFF8 - dev->hard_header_len - t_hlen) | |
838 | return -EINVAL; | |
839 | dev->mtu = new_mtu; | |
840 | return 0; | |
841 | } | |
842 | EXPORT_SYMBOL_GPL(ip_tunnel_change_mtu); | |
843 | ||
844 | static void ip_tunnel_dev_free(struct net_device *dev) | |
845 | { | |
846 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
847 | ||
848 | gro_cells_destroy(&tunnel->gro_cells); | |
9a4aa9af | 849 | free_percpu(tunnel->dst_cache); |
c5441932 PS |
850 | free_percpu(dev->tstats); |
851 | free_netdev(dev); | |
852 | } | |
853 | ||
854 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head) | |
855 | { | |
c5441932 PS |
856 | struct ip_tunnel *tunnel = netdev_priv(dev); |
857 | struct ip_tunnel_net *itn; | |
858 | ||
6c742e71 | 859 | itn = net_generic(tunnel->net, tunnel->ip_tnl_net_id); |
c5441932 PS |
860 | |
861 | if (itn->fb_tunnel_dev != dev) { | |
862 | ip_tunnel_del(netdev_priv(dev)); | |
863 | unregister_netdevice_queue(dev, head); | |
864 | } | |
865 | } | |
866 | EXPORT_SYMBOL_GPL(ip_tunnel_dellink); | |
867 | ||
d3b6f614 | 868 | int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id, |
c5441932 PS |
869 | struct rtnl_link_ops *ops, char *devname) |
870 | { | |
871 | struct ip_tunnel_net *itn = net_generic(net, ip_tnl_net_id); | |
872 | struct ip_tunnel_parm parms; | |
6261d983 | 873 | unsigned int i; |
c5441932 | 874 | |
6261d983 | 875 | for (i = 0; i < IP_TNL_HASH_SIZE; i++) |
876 | INIT_HLIST_HEAD(&itn->tunnels[i]); | |
c5441932 PS |
877 | |
878 | if (!ops) { | |
879 | itn->fb_tunnel_dev = NULL; | |
880 | return 0; | |
881 | } | |
6261d983 | 882 | |
c5441932 PS |
883 | memset(&parms, 0, sizeof(parms)); |
884 | if (devname) | |
885 | strlcpy(parms.name, devname, IFNAMSIZ); | |
886 | ||
887 | rtnl_lock(); | |
888 | itn->fb_tunnel_dev = __ip_tunnel_create(net, ops, &parms); | |
ea857f28 DC |
889 | /* FB netdevice is special: we have one, and only one per netns. |
890 | * Allowing to move it to another netns is clearly unsafe. | |
891 | */ | |
67013282 | 892 | if (!IS_ERR(itn->fb_tunnel_dev)) { |
b4de77ad | 893 | itn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL; |
78ff4be4 | 894 | itn->fb_tunnel_dev->mtu = ip_tunnel_bind_dev(itn->fb_tunnel_dev); |
67013282 SK |
895 | ip_tunnel_add(itn, netdev_priv(itn->fb_tunnel_dev)); |
896 | } | |
b4de77ad | 897 | rtnl_unlock(); |
c5441932 | 898 | |
27d79f3b | 899 | return PTR_ERR_OR_ZERO(itn->fb_tunnel_dev); |
c5441932 PS |
900 | } |
901 | EXPORT_SYMBOL_GPL(ip_tunnel_init_net); | |
902 | ||
6c742e71 ND |
903 | static void ip_tunnel_destroy(struct ip_tunnel_net *itn, struct list_head *head, |
904 | struct rtnl_link_ops *ops) | |
c5441932 | 905 | { |
6c742e71 ND |
906 | struct net *net = dev_net(itn->fb_tunnel_dev); |
907 | struct net_device *dev, *aux; | |
c5441932 PS |
908 | int h; |
909 | ||
6c742e71 ND |
910 | for_each_netdev_safe(net, dev, aux) |
911 | if (dev->rtnl_link_ops == ops) | |
912 | unregister_netdevice_queue(dev, head); | |
913 | ||
c5441932 PS |
914 | for (h = 0; h < IP_TNL_HASH_SIZE; h++) { |
915 | struct ip_tunnel *t; | |
916 | struct hlist_node *n; | |
917 | struct hlist_head *thead = &itn->tunnels[h]; | |
918 | ||
919 | hlist_for_each_entry_safe(t, n, thead, hash_node) | |
6c742e71 ND |
920 | /* If dev is in the same netns, it has already |
921 | * been added to the list by the previous loop. | |
922 | */ | |
923 | if (!net_eq(dev_net(t->dev), net)) | |
924 | unregister_netdevice_queue(t->dev, head); | |
c5441932 | 925 | } |
c5441932 PS |
926 | } |
927 | ||
6c742e71 | 928 | void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops) |
c5441932 PS |
929 | { |
930 | LIST_HEAD(list); | |
931 | ||
932 | rtnl_lock(); | |
6c742e71 | 933 | ip_tunnel_destroy(itn, &list, ops); |
c5441932 PS |
934 | unregister_netdevice_many(&list); |
935 | rtnl_unlock(); | |
c5441932 PS |
936 | } |
937 | EXPORT_SYMBOL_GPL(ip_tunnel_delete_net); | |
938 | ||
939 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], | |
940 | struct ip_tunnel_parm *p) | |
941 | { | |
942 | struct ip_tunnel *nt; | |
943 | struct net *net = dev_net(dev); | |
944 | struct ip_tunnel_net *itn; | |
945 | int mtu; | |
946 | int err; | |
947 | ||
948 | nt = netdev_priv(dev); | |
949 | itn = net_generic(net, nt->ip_tnl_net_id); | |
950 | ||
951 | if (ip_tunnel_find(itn, p, dev->type)) | |
952 | return -EEXIST; | |
953 | ||
5e6700b3 | 954 | nt->net = net; |
c5441932 PS |
955 | nt->parms = *p; |
956 | err = register_netdevice(dev); | |
957 | if (err) | |
958 | goto out; | |
959 | ||
960 | if (dev->type == ARPHRD_ETHER && !tb[IFLA_ADDRESS]) | |
961 | eth_hw_addr_random(dev); | |
962 | ||
963 | mtu = ip_tunnel_bind_dev(dev); | |
964 | if (!tb[IFLA_MTU]) | |
965 | dev->mtu = mtu; | |
966 | ||
967 | ip_tunnel_add(itn, nt); | |
968 | ||
969 | out: | |
970 | return err; | |
971 | } | |
972 | EXPORT_SYMBOL_GPL(ip_tunnel_newlink); | |
973 | ||
974 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], | |
975 | struct ip_tunnel_parm *p) | |
976 | { | |
6c742e71 | 977 | struct ip_tunnel *t; |
c5441932 | 978 | struct ip_tunnel *tunnel = netdev_priv(dev); |
6c742e71 | 979 | struct net *net = tunnel->net; |
c5441932 PS |
980 | struct ip_tunnel_net *itn = net_generic(net, tunnel->ip_tnl_net_id); |
981 | ||
982 | if (dev == itn->fb_tunnel_dev) | |
983 | return -EINVAL; | |
984 | ||
c5441932 PS |
985 | t = ip_tunnel_find(itn, p, dev->type); |
986 | ||
987 | if (t) { | |
988 | if (t->dev != dev) | |
989 | return -EEXIST; | |
990 | } else { | |
6c742e71 | 991 | t = tunnel; |
c5441932 PS |
992 | |
993 | if (dev->type != ARPHRD_ETHER) { | |
994 | unsigned int nflags = 0; | |
995 | ||
996 | if (ipv4_is_multicast(p->iph.daddr)) | |
997 | nflags = IFF_BROADCAST; | |
998 | else if (p->iph.daddr) | |
999 | nflags = IFF_POINTOPOINT; | |
1000 | ||
1001 | if ((dev->flags ^ nflags) & | |
1002 | (IFF_POINTOPOINT | IFF_BROADCAST)) | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | ip_tunnel_update(itn, t, dev, p, !tb[IFLA_MTU]); | |
1008 | return 0; | |
1009 | } | |
1010 | EXPORT_SYMBOL_GPL(ip_tunnel_changelink); | |
1011 | ||
1012 | int ip_tunnel_init(struct net_device *dev) | |
1013 | { | |
1014 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
1015 | struct iphdr *iph = &tunnel->parms.iph; | |
1c213bd2 | 1016 | int err; |
c5441932 PS |
1017 | |
1018 | dev->destructor = ip_tunnel_dev_free; | |
1c213bd2 | 1019 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
c5441932 PS |
1020 | if (!dev->tstats) |
1021 | return -ENOMEM; | |
1022 | ||
9a4aa9af TH |
1023 | tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst); |
1024 | if (!tunnel->dst_cache) { | |
1025 | free_percpu(dev->tstats); | |
1026 | return -ENOMEM; | |
1027 | } | |
1028 | ||
c5441932 PS |
1029 | err = gro_cells_init(&tunnel->gro_cells, dev); |
1030 | if (err) { | |
9a4aa9af | 1031 | free_percpu(tunnel->dst_cache); |
c5441932 PS |
1032 | free_percpu(dev->tstats); |
1033 | return err; | |
1034 | } | |
1035 | ||
1036 | tunnel->dev = dev; | |
6c742e71 | 1037 | tunnel->net = dev_net(dev); |
c5441932 PS |
1038 | strcpy(tunnel->parms.name, dev->name); |
1039 | iph->version = 4; | |
1040 | iph->ihl = 5; | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | EXPORT_SYMBOL_GPL(ip_tunnel_init); | |
1045 | ||
1046 | void ip_tunnel_uninit(struct net_device *dev) | |
1047 | { | |
c5441932 | 1048 | struct ip_tunnel *tunnel = netdev_priv(dev); |
6c742e71 | 1049 | struct net *net = tunnel->net; |
c5441932 PS |
1050 | struct ip_tunnel_net *itn; |
1051 | ||
1052 | itn = net_generic(net, tunnel->ip_tnl_net_id); | |
1053 | /* fb_tunnel_dev will be unregisted in net-exit call. */ | |
1054 | if (itn->fb_tunnel_dev != dev) | |
1055 | ip_tunnel_del(netdev_priv(dev)); | |
7d442fab | 1056 | |
cf71d2bc | 1057 | ip_tunnel_dst_reset_all(tunnel); |
c5441932 PS |
1058 | } |
1059 | EXPORT_SYMBOL_GPL(ip_tunnel_uninit); | |
1060 | ||
1061 | /* Do least required initialization, rest of init is done in tunnel_init call */ | |
1062 | void ip_tunnel_setup(struct net_device *dev, int net_id) | |
1063 | { | |
1064 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
1065 | tunnel->ip_tnl_net_id = net_id; | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(ip_tunnel_setup); | |
1068 | ||
1069 | MODULE_LICENSE("GPL"); |