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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c12b395a | 2 | /* |
3 | * GRE over IPv6 protocol decoder. | |
4 | * | |
5 | * Authors: Dmitry Kozlov (xeb@mail.ru) | |
c12b395a | 6 | */ |
7 | ||
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | ||
10 | #include <linux/capability.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/uaccess.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/tcp.h> | |
20 | #include <linux/udp.h> | |
21 | #include <linux/if_arp.h> | |
c12b395a | 22 | #include <linux/init.h> |
23 | #include <linux/in6.h> | |
24 | #include <linux/inetdevice.h> | |
25 | #include <linux/igmp.h> | |
26 | #include <linux/netfilter_ipv4.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/if_ether.h> | |
29 | #include <linux/hash.h> | |
30 | #include <linux/if_tunnel.h> | |
31 | #include <linux/ip6_tunnel.h> | |
32 | ||
33 | #include <net/sock.h> | |
34 | #include <net/ip.h> | |
c5441932 | 35 | #include <net/ip_tunnels.h> |
c12b395a | 36 | #include <net/icmp.h> |
37 | #include <net/protocol.h> | |
38 | #include <net/addrconf.h> | |
39 | #include <net/arp.h> | |
40 | #include <net/checksum.h> | |
41 | #include <net/dsfield.h> | |
42 | #include <net/inet_ecn.h> | |
43 | #include <net/xfrm.h> | |
44 | #include <net/net_namespace.h> | |
45 | #include <net/netns/generic.h> | |
46 | #include <net/rtnetlink.h> | |
47 | ||
48 | #include <net/ipv6.h> | |
49 | #include <net/ip6_fib.h> | |
50 | #include <net/ip6_route.h> | |
51 | #include <net/ip6_tunnel.h> | |
308edfdf | 52 | #include <net/gre.h> |
5a963eb6 | 53 | #include <net/erspan.h> |
6712abc1 | 54 | #include <net/dst_metadata.h> |
c12b395a | 55 | |
56 | ||
eccc1bb8 | 57 | static bool log_ecn_error = true; |
58 | module_param(log_ecn_error, bool, 0644); | |
59 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
60 | ||
e87a8f24 JK |
61 | #define IP6_GRE_HASH_SIZE_SHIFT 5 |
62 | #define IP6_GRE_HASH_SIZE (1 << IP6_GRE_HASH_SIZE_SHIFT) | |
c12b395a | 63 | |
c7d03a00 | 64 | static unsigned int ip6gre_net_id __read_mostly; |
c12b395a | 65 | struct ip6gre_net { |
e87a8f24 | 66 | struct ip6_tnl __rcu *tunnels[4][IP6_GRE_HASH_SIZE]; |
c12b395a | 67 | |
6712abc1 | 68 | struct ip6_tnl __rcu *collect_md_tun; |
b80d0b93 | 69 | struct ip6_tnl __rcu *collect_md_tun_erspan; |
c12b395a | 70 | struct net_device *fb_tunnel_dev; |
71 | }; | |
72 | ||
73 | static struct rtnl_link_ops ip6gre_link_ops __read_mostly; | |
22f08069 | 74 | static struct rtnl_link_ops ip6gre_tap_ops __read_mostly; |
5a963eb6 | 75 | static struct rtnl_link_ops ip6erspan_tap_ops __read_mostly; |
c12b395a | 76 | static int ip6gre_tunnel_init(struct net_device *dev); |
77 | static void ip6gre_tunnel_setup(struct net_device *dev); | |
78 | static void ip6gre_tunnel_link(struct ip6gre_net *ign, struct ip6_tnl *t); | |
79 | static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu); | |
2d665034 | 80 | static void ip6erspan_tnl_link_config(struct ip6_tnl *t, int set_mtu); |
c12b395a | 81 | |
82 | /* Tunnel hash table */ | |
83 | ||
84 | /* | |
85 | 4 hash tables: | |
86 | ||
87 | 3: (remote,local) | |
88 | 2: (remote,*) | |
89 | 1: (*,local) | |
90 | 0: (*,*) | |
91 | ||
92 | We require exact key match i.e. if a key is present in packet | |
93 | it will match only tunnel with the same key; if it is not present, | |
94 | it will match only keyless tunnel. | |
95 | ||
96 | All keysless packets, if not matched configured keyless tunnels | |
97 | will match fallback tunnel. | |
98 | */ | |
99 | ||
e87a8f24 | 100 | #define HASH_KEY(key) (((__force u32)key^((__force u32)key>>4))&(IP6_GRE_HASH_SIZE - 1)) |
c12b395a | 101 | static u32 HASH_ADDR(const struct in6_addr *addr) |
102 | { | |
103 | u32 hash = ipv6_addr_hash(addr); | |
104 | ||
e87a8f24 | 105 | return hash_32(hash, IP6_GRE_HASH_SIZE_SHIFT); |
c12b395a | 106 | } |
107 | ||
108 | #define tunnels_r_l tunnels[3] | |
109 | #define tunnels_r tunnels[2] | |
110 | #define tunnels_l tunnels[1] | |
111 | #define tunnels_wc tunnels[0] | |
c12b395a | 112 | |
c12b395a | 113 | /* Given src, dst and key, find appropriate for input tunnel. */ |
114 | ||
115 | static struct ip6_tnl *ip6gre_tunnel_lookup(struct net_device *dev, | |
116 | const struct in6_addr *remote, const struct in6_addr *local, | |
117 | __be32 key, __be16 gre_proto) | |
118 | { | |
119 | struct net *net = dev_net(dev); | |
120 | int link = dev->ifindex; | |
121 | unsigned int h0 = HASH_ADDR(remote); | |
122 | unsigned int h1 = HASH_KEY(key); | |
123 | struct ip6_tnl *t, *cand = NULL; | |
124 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); | |
5a963eb6 | 125 | int dev_type = (gre_proto == htons(ETH_P_TEB) || |
3b04caab WT |
126 | gre_proto == htons(ETH_P_ERSPAN) || |
127 | gre_proto == htons(ETH_P_ERSPAN2)) ? | |
c12b395a | 128 | ARPHRD_ETHER : ARPHRD_IP6GRE; |
129 | int score, cand_score = 4; | |
130 | ||
e086cadc | 131 | for_each_ip_tunnel_rcu(t, ign->tunnels_r_l[h0 ^ h1]) { |
c12b395a | 132 | if (!ipv6_addr_equal(local, &t->parms.laddr) || |
133 | !ipv6_addr_equal(remote, &t->parms.raddr) || | |
134 | key != t->parms.i_key || | |
135 | !(t->dev->flags & IFF_UP)) | |
136 | continue; | |
137 | ||
138 | if (t->dev->type != ARPHRD_IP6GRE && | |
139 | t->dev->type != dev_type) | |
140 | continue; | |
141 | ||
142 | score = 0; | |
143 | if (t->parms.link != link) | |
144 | score |= 1; | |
145 | if (t->dev->type != dev_type) | |
146 | score |= 2; | |
147 | if (score == 0) | |
148 | return t; | |
149 | ||
150 | if (score < cand_score) { | |
151 | cand = t; | |
152 | cand_score = score; | |
153 | } | |
154 | } | |
155 | ||
e086cadc | 156 | for_each_ip_tunnel_rcu(t, ign->tunnels_r[h0 ^ h1]) { |
c12b395a | 157 | if (!ipv6_addr_equal(remote, &t->parms.raddr) || |
158 | key != t->parms.i_key || | |
159 | !(t->dev->flags & IFF_UP)) | |
160 | continue; | |
161 | ||
162 | if (t->dev->type != ARPHRD_IP6GRE && | |
163 | t->dev->type != dev_type) | |
164 | continue; | |
165 | ||
166 | score = 0; | |
167 | if (t->parms.link != link) | |
168 | score |= 1; | |
169 | if (t->dev->type != dev_type) | |
170 | score |= 2; | |
171 | if (score == 0) | |
172 | return t; | |
173 | ||
174 | if (score < cand_score) { | |
175 | cand = t; | |
176 | cand_score = score; | |
177 | } | |
178 | } | |
179 | ||
e086cadc | 180 | for_each_ip_tunnel_rcu(t, ign->tunnels_l[h1]) { |
c12b395a | 181 | if ((!ipv6_addr_equal(local, &t->parms.laddr) && |
182 | (!ipv6_addr_equal(local, &t->parms.raddr) || | |
183 | !ipv6_addr_is_multicast(local))) || | |
184 | key != t->parms.i_key || | |
185 | !(t->dev->flags & IFF_UP)) | |
186 | continue; | |
187 | ||
188 | if (t->dev->type != ARPHRD_IP6GRE && | |
189 | t->dev->type != dev_type) | |
190 | continue; | |
191 | ||
192 | score = 0; | |
193 | if (t->parms.link != link) | |
194 | score |= 1; | |
195 | if (t->dev->type != dev_type) | |
196 | score |= 2; | |
197 | if (score == 0) | |
198 | return t; | |
199 | ||
200 | if (score < cand_score) { | |
201 | cand = t; | |
202 | cand_score = score; | |
203 | } | |
204 | } | |
205 | ||
e086cadc | 206 | for_each_ip_tunnel_rcu(t, ign->tunnels_wc[h1]) { |
c12b395a | 207 | if (t->parms.i_key != key || |
208 | !(t->dev->flags & IFF_UP)) | |
209 | continue; | |
210 | ||
211 | if (t->dev->type != ARPHRD_IP6GRE && | |
212 | t->dev->type != dev_type) | |
213 | continue; | |
214 | ||
215 | score = 0; | |
216 | if (t->parms.link != link) | |
217 | score |= 1; | |
218 | if (t->dev->type != dev_type) | |
219 | score |= 2; | |
220 | if (score == 0) | |
221 | return t; | |
222 | ||
223 | if (score < cand_score) { | |
224 | cand = t; | |
225 | cand_score = score; | |
226 | } | |
227 | } | |
228 | ||
53b24b8f | 229 | if (cand) |
c12b395a | 230 | return cand; |
231 | ||
b80d0b93 WT |
232 | if (gre_proto == htons(ETH_P_ERSPAN) || |
233 | gre_proto == htons(ETH_P_ERSPAN2)) | |
234 | t = rcu_dereference(ign->collect_md_tun_erspan); | |
235 | else | |
236 | t = rcu_dereference(ign->collect_md_tun); | |
237 | ||
6712abc1 WT |
238 | if (t && t->dev->flags & IFF_UP) |
239 | return t; | |
240 | ||
c12b395a | 241 | dev = ign->fb_tunnel_dev; |
79134e6c | 242 | if (dev && dev->flags & IFF_UP) |
c12b395a | 243 | return netdev_priv(dev); |
244 | ||
245 | return NULL; | |
246 | } | |
247 | ||
248 | static struct ip6_tnl __rcu **__ip6gre_bucket(struct ip6gre_net *ign, | |
249 | const struct __ip6_tnl_parm *p) | |
250 | { | |
251 | const struct in6_addr *remote = &p->raddr; | |
252 | const struct in6_addr *local = &p->laddr; | |
253 | unsigned int h = HASH_KEY(p->i_key); | |
254 | int prio = 0; | |
255 | ||
256 | if (!ipv6_addr_any(local)) | |
257 | prio |= 1; | |
258 | if (!ipv6_addr_any(remote) && !ipv6_addr_is_multicast(remote)) { | |
259 | prio |= 2; | |
260 | h ^= HASH_ADDR(remote); | |
261 | } | |
262 | ||
263 | return &ign->tunnels[prio][h]; | |
264 | } | |
265 | ||
b80d0b93 WT |
266 | static void ip6gre_tunnel_link_md(struct ip6gre_net *ign, struct ip6_tnl *t) |
267 | { | |
268 | if (t->parms.collect_md) | |
269 | rcu_assign_pointer(ign->collect_md_tun, t); | |
270 | } | |
271 | ||
272 | static void ip6erspan_tunnel_link_md(struct ip6gre_net *ign, struct ip6_tnl *t) | |
273 | { | |
274 | if (t->parms.collect_md) | |
275 | rcu_assign_pointer(ign->collect_md_tun_erspan, t); | |
276 | } | |
277 | ||
278 | static void ip6gre_tunnel_unlink_md(struct ip6gre_net *ign, struct ip6_tnl *t) | |
279 | { | |
280 | if (t->parms.collect_md) | |
281 | rcu_assign_pointer(ign->collect_md_tun, NULL); | |
282 | } | |
283 | ||
284 | static void ip6erspan_tunnel_unlink_md(struct ip6gre_net *ign, | |
285 | struct ip6_tnl *t) | |
286 | { | |
287 | if (t->parms.collect_md) | |
288 | rcu_assign_pointer(ign->collect_md_tun_erspan, NULL); | |
289 | } | |
290 | ||
c12b395a | 291 | static inline struct ip6_tnl __rcu **ip6gre_bucket(struct ip6gre_net *ign, |
292 | const struct ip6_tnl *t) | |
293 | { | |
294 | return __ip6gre_bucket(ign, &t->parms); | |
295 | } | |
296 | ||
297 | static void ip6gre_tunnel_link(struct ip6gre_net *ign, struct ip6_tnl *t) | |
298 | { | |
299 | struct ip6_tnl __rcu **tp = ip6gre_bucket(ign, t); | |
300 | ||
301 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); | |
302 | rcu_assign_pointer(*tp, t); | |
303 | } | |
304 | ||
305 | static void ip6gre_tunnel_unlink(struct ip6gre_net *ign, struct ip6_tnl *t) | |
306 | { | |
307 | struct ip6_tnl __rcu **tp; | |
308 | struct ip6_tnl *iter; | |
309 | ||
310 | for (tp = ip6gre_bucket(ign, t); | |
311 | (iter = rtnl_dereference(*tp)) != NULL; | |
312 | tp = &iter->next) { | |
313 | if (t == iter) { | |
314 | rcu_assign_pointer(*tp, t->next); | |
315 | break; | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | static struct ip6_tnl *ip6gre_tunnel_find(struct net *net, | |
321 | const struct __ip6_tnl_parm *parms, | |
322 | int type) | |
323 | { | |
324 | const struct in6_addr *remote = &parms->raddr; | |
325 | const struct in6_addr *local = &parms->laddr; | |
326 | __be32 key = parms->i_key; | |
327 | int link = parms->link; | |
328 | struct ip6_tnl *t; | |
329 | struct ip6_tnl __rcu **tp; | |
330 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); | |
331 | ||
332 | for (tp = __ip6gre_bucket(ign, parms); | |
333 | (t = rtnl_dereference(*tp)) != NULL; | |
334 | tp = &t->next) | |
335 | if (ipv6_addr_equal(local, &t->parms.laddr) && | |
336 | ipv6_addr_equal(remote, &t->parms.raddr) && | |
337 | key == t->parms.i_key && | |
338 | link == t->parms.link && | |
339 | type == t->dev->type) | |
340 | break; | |
341 | ||
342 | return t; | |
343 | } | |
344 | ||
345 | static struct ip6_tnl *ip6gre_tunnel_locate(struct net *net, | |
346 | const struct __ip6_tnl_parm *parms, int create) | |
347 | { | |
348 | struct ip6_tnl *t, *nt; | |
349 | struct net_device *dev; | |
350 | char name[IFNAMSIZ]; | |
351 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); | |
352 | ||
353 | t = ip6gre_tunnel_find(net, parms, ARPHRD_IP6GRE); | |
cd0a0bd9 SK |
354 | if (t && create) |
355 | return NULL; | |
c12b395a | 356 | if (t || !create) |
357 | return t; | |
358 | ||
5f42df01 ED |
359 | if (parms->name[0]) { |
360 | if (!dev_valid_name(parms->name)) | |
361 | return NULL; | |
c12b395a | 362 | strlcpy(name, parms->name, IFNAMSIZ); |
5f42df01 | 363 | } else { |
c12b395a | 364 | strcpy(name, "ip6gre%d"); |
5f42df01 | 365 | } |
c835a677 TG |
366 | dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, |
367 | ip6gre_tunnel_setup); | |
c12b395a | 368 | if (!dev) |
369 | return NULL; | |
370 | ||
371 | dev_net_set(dev, net); | |
372 | ||
373 | nt = netdev_priv(dev); | |
374 | nt->parms = *parms; | |
375 | dev->rtnl_link_ops = &ip6gre_link_ops; | |
376 | ||
377 | nt->dev = dev; | |
0bd87628 | 378 | nt->net = dev_net(dev); |
c12b395a | 379 | |
380 | if (register_netdevice(dev) < 0) | |
381 | goto failed_free; | |
382 | ||
128bb975 AK |
383 | ip6gre_tnl_link_config(nt, 1); |
384 | ||
c12b395a | 385 | /* Can use a lockless transmit, unless we generate output sequences */ |
b45bd1d7 | 386 | if (!(nt->parms.o_flags & TUNNEL_SEQ)) |
c12b395a | 387 | dev->features |= NETIF_F_LLTX; |
388 | ||
389 | dev_hold(dev); | |
390 | ip6gre_tunnel_link(ign, nt); | |
391 | return nt; | |
392 | ||
393 | failed_free: | |
394 | free_netdev(dev); | |
395 | return NULL; | |
396 | } | |
397 | ||
b80d0b93 WT |
398 | static void ip6erspan_tunnel_uninit(struct net_device *dev) |
399 | { | |
400 | struct ip6_tnl *t = netdev_priv(dev); | |
401 | struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id); | |
402 | ||
403 | ip6erspan_tunnel_unlink_md(ign, t); | |
404 | ip6gre_tunnel_unlink(ign, t); | |
405 | dst_cache_reset(&t->dst_cache); | |
406 | dev_put(dev); | |
407 | } | |
408 | ||
c12b395a | 409 | static void ip6gre_tunnel_uninit(struct net_device *dev) |
410 | { | |
22f08069 ND |
411 | struct ip6_tnl *t = netdev_priv(dev); |
412 | struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id); | |
c12b395a | 413 | |
b80d0b93 | 414 | ip6gre_tunnel_unlink_md(ign, t); |
22f08069 | 415 | ip6gre_tunnel_unlink(ign, t); |
607f725f | 416 | dst_cache_reset(&t->dst_cache); |
c12b395a | 417 | dev_put(dev); |
418 | } | |
419 | ||
420 | ||
32bbd879 | 421 | static int ip6gre_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
7892032c | 422 | u8 type, u8 code, int offset, __be32 info) |
c12b395a | 423 | { |
929fc032 | 424 | struct net *net = dev_net(skb->dev); |
7892032c | 425 | const struct ipv6hdr *ipv6h; |
a82738ad | 426 | struct tnl_ptk_info tpi; |
c12b395a | 427 | struct ip6_tnl *t; |
c12b395a | 428 | |
a82738ad HY |
429 | if (gre_parse_header(skb, &tpi, NULL, htons(ETH_P_IPV6), |
430 | offset) < 0) | |
32bbd879 | 431 | return -EINVAL; |
c12b395a | 432 | |
b87fb39e | 433 | ipv6h = (const struct ipv6hdr *)skb->data; |
c12b395a | 434 | t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr, |
a82738ad | 435 | tpi.key, tpi.proto); |
63159f29 | 436 | if (!t) |
32bbd879 | 437 | return -ENOENT; |
c12b395a | 438 | |
439 | switch (type) { | |
c12b395a | 440 | struct ipv6_tlv_tnl_enc_lim *tel; |
fe1a4ca0 | 441 | __u32 teli; |
c12b395a | 442 | case ICMPV6_DEST_UNREACH: |
a46496ce MB |
443 | net_dbg_ratelimited("%s: Path to destination invalid or inactive!\n", |
444 | t->parms.name); | |
f8d20b46 XL |
445 | if (code != ICMPV6_PORT_UNREACH) |
446 | break; | |
32bbd879 | 447 | return 0; |
c12b395a | 448 | case ICMPV6_TIME_EXCEED: |
449 | if (code == ICMPV6_EXC_HOPLIMIT) { | |
a46496ce MB |
450 | net_dbg_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n", |
451 | t->parms.name); | |
f8d20b46 | 452 | break; |
c12b395a | 453 | } |
32bbd879 | 454 | return 0; |
c12b395a | 455 | case ICMPV6_PARAMPROB: |
456 | teli = 0; | |
457 | if (code == ICMPV6_HDR_FIELD) | |
458 | teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data); | |
459 | ||
d1e158e2 | 460 | if (teli && teli == be32_to_cpu(info) - 2) { |
c12b395a | 461 | tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; |
462 | if (tel->encap_limit == 0) { | |
a46496ce MB |
463 | net_dbg_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n", |
464 | t->parms.name); | |
c12b395a | 465 | } |
466 | } else { | |
a46496ce MB |
467 | net_dbg_ratelimited("%s: Recipient unable to parse tunneled packet!\n", |
468 | t->parms.name); | |
c12b395a | 469 | } |
32bbd879 | 470 | return 0; |
c12b395a | 471 | case ICMPV6_PKT_TOOBIG: |
fe1a4ca0 | 472 | ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL)); |
32bbd879 | 473 | return 0; |
929fc032 XL |
474 | case NDISC_REDIRECT: |
475 | ip6_redirect(skb, net, skb->dev->ifindex, 0, | |
476 | sock_net_uid(net, NULL)); | |
32bbd879 | 477 | return 0; |
c12b395a | 478 | } |
479 | ||
480 | if (time_before(jiffies, t->err_time + IP6TUNNEL_ERR_TIMEO)) | |
481 | t->err_count++; | |
482 | else | |
483 | t->err_count = 1; | |
484 | t->err_time = jiffies; | |
32bbd879 SB |
485 | |
486 | return 0; | |
c12b395a | 487 | } |
488 | ||
308edfdf | 489 | static int ip6gre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi) |
c12b395a | 490 | { |
491 | const struct ipv6hdr *ipv6h; | |
c12b395a | 492 | struct ip6_tnl *tunnel; |
c12b395a | 493 | |
494 | ipv6h = ipv6_hdr(skb); | |
c12b395a | 495 | tunnel = ip6gre_tunnel_lookup(skb->dev, |
308edfdf TH |
496 | &ipv6h->saddr, &ipv6h->daddr, tpi->key, |
497 | tpi->proto); | |
c12b395a | 498 | if (tunnel) { |
6712abc1 WT |
499 | if (tunnel->parms.collect_md) { |
500 | struct metadata_dst *tun_dst; | |
501 | __be64 tun_id; | |
502 | __be16 flags; | |
503 | ||
504 | flags = tpi->flags; | |
505 | tun_id = key32_to_tunnel_id(tpi->key); | |
506 | ||
507 | tun_dst = ipv6_tun_rx_dst(skb, flags, tun_id, 0); | |
508 | if (!tun_dst) | |
509 | return PACKET_REJECT; | |
510 | ||
511 | ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error); | |
512 | } else { | |
513 | ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error); | |
514 | } | |
c12b395a | 515 | |
308edfdf TH |
516 | return PACKET_RCVD; |
517 | } | |
eccc1bb8 | 518 | |
308edfdf TH |
519 | return PACKET_REJECT; |
520 | } | |
eccc1bb8 | 521 | |
a057fed3 | 522 | static int ip6erspan_rcv(struct sk_buff *skb, |
2a3cabae LB |
523 | struct tnl_ptk_info *tpi, |
524 | int gre_hdr_len) | |
5a963eb6 | 525 | { |
1d7e2ed2 | 526 | struct erspan_base_hdr *ershdr; |
5a963eb6 | 527 | const struct ipv6hdr *ipv6h; |
3df19283 | 528 | struct erspan_md2 *md2; |
5a963eb6 | 529 | struct ip6_tnl *tunnel; |
1d7e2ed2 | 530 | u8 ver; |
5a963eb6 | 531 | |
293a1991 HY |
532 | ipv6h = ipv6_hdr(skb); |
533 | ershdr = (struct erspan_base_hdr *)skb->data; | |
c69de58b | 534 | ver = ershdr->ver; |
5a963eb6 WT |
535 | |
536 | tunnel = ip6gre_tunnel_lookup(skb->dev, | |
537 | &ipv6h->saddr, &ipv6h->daddr, tpi->key, | |
538 | tpi->proto); | |
539 | if (tunnel) { | |
1d7e2ed2 WT |
540 | int len = erspan_hdr_len(ver); |
541 | ||
542 | if (unlikely(!pskb_may_pull(skb, len))) | |
ae3e1337 | 543 | return PACKET_REJECT; |
1d7e2ed2 WT |
544 | |
545 | if (__iptunnel_pull_header(skb, len, | |
5a963eb6 WT |
546 | htons(ETH_P_TEB), |
547 | false, false) < 0) | |
548 | return PACKET_REJECT; | |
549 | ||
ef7baf5e | 550 | if (tunnel->parms.collect_md) { |
2a3cabae | 551 | struct erspan_metadata *pkt_md, *md; |
ef7baf5e WT |
552 | struct metadata_dst *tun_dst; |
553 | struct ip_tunnel_info *info; | |
2a3cabae | 554 | unsigned char *gh; |
ef7baf5e WT |
555 | __be64 tun_id; |
556 | __be16 flags; | |
557 | ||
558 | tpi->flags |= TUNNEL_KEY; | |
559 | flags = tpi->flags; | |
560 | tun_id = key32_to_tunnel_id(tpi->key); | |
561 | ||
562 | tun_dst = ipv6_tun_rx_dst(skb, flags, tun_id, | |
563 | sizeof(*md)); | |
564 | if (!tun_dst) | |
565 | return PACKET_REJECT; | |
566 | ||
2a3cabae LB |
567 | /* skb can be uncloned in __iptunnel_pull_header, so |
568 | * old pkt_md is no longer valid and we need to reset | |
569 | * it | |
570 | */ | |
571 | gh = skb_network_header(skb) + | |
572 | skb_network_header_len(skb); | |
573 | pkt_md = (struct erspan_metadata *)(gh + gre_hdr_len + | |
574 | sizeof(*ershdr)); | |
ef7baf5e WT |
575 | info = &tun_dst->u.tun_info; |
576 | md = ip_tunnel_info_opts(info); | |
94d7d8f2 | 577 | md->version = ver; |
3df19283 WT |
578 | md2 = &md->u.md2; |
579 | memcpy(md2, pkt_md, ver == 1 ? ERSPAN_V1_MDSIZE : | |
580 | ERSPAN_V2_MDSIZE); | |
ef7baf5e WT |
581 | info->key.tun_flags |= TUNNEL_ERSPAN_OPT; |
582 | info->options_len = sizeof(*md); | |
583 | ||
584 | ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error); | |
585 | ||
586 | } else { | |
ef7baf5e WT |
587 | ip6_tnl_rcv(tunnel, skb, tpi, NULL, log_ecn_error); |
588 | } | |
5a963eb6 WT |
589 | |
590 | return PACKET_RCVD; | |
591 | } | |
592 | ||
593 | return PACKET_REJECT; | |
594 | } | |
595 | ||
308edfdf TH |
596 | static int gre_rcv(struct sk_buff *skb) |
597 | { | |
598 | struct tnl_ptk_info tpi; | |
599 | bool csum_err = false; | |
600 | int hdr_len; | |
eccc1bb8 | 601 | |
e582615a | 602 | hdr_len = gre_parse_header(skb, &tpi, &csum_err, htons(ETH_P_IPV6), 0); |
f132ae7c | 603 | if (hdr_len < 0) |
308edfdf | 604 | goto drop; |
c12b395a | 605 | |
308edfdf TH |
606 | if (iptunnel_pull_header(skb, hdr_len, tpi.proto, false)) |
607 | goto drop; | |
c12b395a | 608 | |
94d7d8f2 WT |
609 | if (unlikely(tpi.proto == htons(ETH_P_ERSPAN) || |
610 | tpi.proto == htons(ETH_P_ERSPAN2))) { | |
2a3cabae | 611 | if (ip6erspan_rcv(skb, &tpi, hdr_len) == PACKET_RCVD) |
5a963eb6 | 612 | return 0; |
a7343211 | 613 | goto out; |
5a963eb6 WT |
614 | } |
615 | ||
308edfdf | 616 | if (ip6gre_rcv(skb, &tpi) == PACKET_RCVD) |
c12b395a | 617 | return 0; |
c12b395a | 618 | |
a7343211 | 619 | out: |
308edfdf | 620 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
c12b395a | 621 | drop: |
c12b395a | 622 | kfree_skb(skb); |
623 | return 0; | |
624 | } | |
625 | ||
b05229f4 | 626 | static int gre_handle_offloads(struct sk_buff *skb, bool csum) |
c12b395a | 627 | { |
b05229f4 TH |
628 | return iptunnel_handle_offloads(skb, |
629 | csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE); | |
c12b395a | 630 | } |
631 | ||
898b2979 WT |
632 | static void prepare_ip6gre_xmit_ipv4(struct sk_buff *skb, |
633 | struct net_device *dev, | |
634 | struct flowi6 *fl6, __u8 *dsfield, | |
635 | int *encap_limit) | |
636 | { | |
637 | const struct iphdr *iph = ip_hdr(skb); | |
638 | struct ip6_tnl *t = netdev_priv(dev); | |
639 | ||
640 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
641 | *encap_limit = t->parms.encap_limit; | |
642 | ||
643 | memcpy(fl6, &t->fl.u.ip6, sizeof(*fl6)); | |
644 | ||
645 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) | |
646 | *dsfield = ipv4_get_dsfield(iph); | |
647 | else | |
648 | *dsfield = ip6_tclass(t->parms.flowinfo); | |
649 | ||
650 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) | |
651 | fl6->flowi6_mark = skb->mark; | |
652 | else | |
653 | fl6->flowi6_mark = t->parms.fwmark; | |
654 | ||
655 | fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL); | |
656 | } | |
657 | ||
658 | static int prepare_ip6gre_xmit_ipv6(struct sk_buff *skb, | |
659 | struct net_device *dev, | |
660 | struct flowi6 *fl6, __u8 *dsfield, | |
661 | int *encap_limit) | |
662 | { | |
3bc817d6 | 663 | struct ipv6hdr *ipv6h; |
898b2979 WT |
664 | struct ip6_tnl *t = netdev_priv(dev); |
665 | __u16 offset; | |
666 | ||
667 | offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb)); | |
668 | /* ip6_tnl_parse_tlv_enc_lim() might have reallocated skb->head */ | |
3bc817d6 | 669 | ipv6h = ipv6_hdr(skb); |
898b2979 WT |
670 | |
671 | if (offset > 0) { | |
672 | struct ipv6_tlv_tnl_enc_lim *tel; | |
673 | ||
674 | tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset]; | |
675 | if (tel->encap_limit == 0) { | |
676 | icmpv6_send(skb, ICMPV6_PARAMPROB, | |
677 | ICMPV6_HDR_FIELD, offset + 2); | |
678 | return -1; | |
679 | } | |
680 | *encap_limit = tel->encap_limit - 1; | |
681 | } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) { | |
682 | *encap_limit = t->parms.encap_limit; | |
683 | } | |
684 | ||
685 | memcpy(fl6, &t->fl.u.ip6, sizeof(*fl6)); | |
686 | ||
687 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) | |
688 | *dsfield = ipv6_get_dsfield(ipv6h); | |
689 | else | |
690 | *dsfield = ip6_tclass(t->parms.flowinfo); | |
691 | ||
692 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) | |
693 | fl6->flowlabel |= ip6_flowlabel(ipv6h); | |
694 | ||
695 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) | |
696 | fl6->flowi6_mark = skb->mark; | |
697 | else | |
698 | fl6->flowi6_mark = t->parms.fwmark; | |
699 | ||
700 | fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
b05229f4 TH |
705 | static netdev_tx_t __gre6_xmit(struct sk_buff *skb, |
706 | struct net_device *dev, __u8 dsfield, | |
707 | struct flowi6 *fl6, int encap_limit, | |
708 | __u32 *pmtu, __be16 proto) | |
c12b395a | 709 | { |
c12b395a | 710 | struct ip6_tnl *tunnel = netdev_priv(dev); |
8aec4959 | 711 | __be16 protocol; |
c12b395a | 712 | |
713 | if (dev->type == ARPHRD_ETHER) | |
714 | IPCB(skb)->flags = 0; | |
715 | ||
b05229f4 TH |
716 | if (dev->header_ops && dev->type == ARPHRD_IP6GRE) |
717 | fl6->daddr = ((struct ipv6hdr *)skb->data)->daddr; | |
718 | else | |
c12b395a | 719 | fl6->daddr = tunnel->parms.raddr; |
c12b395a | 720 | |
01b8d064 PM |
721 | if (skb_cow_head(skb, dev->needed_headroom ?: tunnel->hlen)) |
722 | return -ENOMEM; | |
723 | ||
b05229f4 | 724 | /* Push GRE header. */ |
8aec4959 | 725 | protocol = (dev->type == ARPHRD_ETHER) ? htons(ETH_P_TEB) : proto; |
6712abc1 WT |
726 | |
727 | if (tunnel->parms.collect_md) { | |
728 | struct ip_tunnel_info *tun_info; | |
729 | const struct ip_tunnel_key *key; | |
730 | __be16 flags; | |
731 | ||
732 | tun_info = skb_tunnel_info(skb); | |
733 | if (unlikely(!tun_info || | |
734 | !(tun_info->mode & IP_TUNNEL_INFO_TX) || | |
735 | ip_tunnel_info_af(tun_info) != AF_INET6)) | |
736 | return -EINVAL; | |
737 | ||
738 | key = &tun_info->key; | |
739 | memset(fl6, 0, sizeof(*fl6)); | |
740 | fl6->flowi6_proto = IPPROTO_GRE; | |
741 | fl6->daddr = key->u.ipv6.dst; | |
742 | fl6->flowlabel = key->label; | |
743 | fl6->flowi6_uid = sock_net_uid(dev_net(dev), NULL); | |
744 | ||
745 | dsfield = key->tos; | |
77a5196a WT |
746 | flags = key->tun_flags & |
747 | (TUNNEL_CSUM | TUNNEL_KEY | TUNNEL_SEQ); | |
6712abc1 WT |
748 | tunnel->tun_hlen = gre_calc_hlen(flags); |
749 | ||
750 | gre_build_header(skb, tunnel->tun_hlen, | |
751 | flags, protocol, | |
77a5196a | 752 | tunnel_id_to_key32(tun_info->key.tun_id), |
15746394 | 753 | (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++) |
77a5196a | 754 | : 0); |
6712abc1 WT |
755 | |
756 | } else { | |
77a5196a WT |
757 | if (tunnel->parms.o_flags & TUNNEL_SEQ) |
758 | tunnel->o_seqno++; | |
759 | ||
6712abc1 WT |
760 | gre_build_header(skb, tunnel->tun_hlen, tunnel->parms.o_flags, |
761 | protocol, tunnel->parms.o_key, | |
762 | htonl(tunnel->o_seqno)); | |
763 | } | |
c12b395a | 764 | |
b05229f4 TH |
765 | return ip6_tnl_xmit(skb, dev, dsfield, fl6, encap_limit, pmtu, |
766 | NEXTHDR_GRE); | |
c12b395a | 767 | } |
768 | ||
769 | static inline int ip6gre_xmit_ipv4(struct sk_buff *skb, struct net_device *dev) | |
770 | { | |
771 | struct ip6_tnl *t = netdev_priv(dev); | |
c12b395a | 772 | int encap_limit = -1; |
773 | struct flowi6 fl6; | |
6712abc1 | 774 | __u8 dsfield = 0; |
c12b395a | 775 | __u32 mtu; |
776 | int err; | |
777 | ||
5146d1f1 BH |
778 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
779 | ||
6712abc1 WT |
780 | if (!t->parms.collect_md) |
781 | prepare_ip6gre_xmit_ipv4(skb, dev, &fl6, | |
782 | &dsfield, &encap_limit); | |
e2d118a1 | 783 | |
b05229f4 TH |
784 | err = gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM)); |
785 | if (err) | |
786 | return -1; | |
787 | ||
788 | err = __gre6_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu, | |
789 | skb->protocol); | |
c12b395a | 790 | if (err != 0) { |
791 | /* XXX: send ICMP error even if DF is not set. */ | |
792 | if (err == -EMSGSIZE) | |
793 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, | |
794 | htonl(mtu)); | |
795 | return -1; | |
796 | } | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static inline int ip6gre_xmit_ipv6(struct sk_buff *skb, struct net_device *dev) | |
802 | { | |
803 | struct ip6_tnl *t = netdev_priv(dev); | |
804 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); | |
805 | int encap_limit = -1; | |
c12b395a | 806 | struct flowi6 fl6; |
6712abc1 | 807 | __u8 dsfield = 0; |
c12b395a | 808 | __u32 mtu; |
809 | int err; | |
810 | ||
811 | if (ipv6_addr_equal(&t->parms.raddr, &ipv6h->saddr)) | |
812 | return -1; | |
813 | ||
6712abc1 WT |
814 | if (!t->parms.collect_md && |
815 | prepare_ip6gre_xmit_ipv6(skb, dev, &fl6, &dsfield, &encap_limit)) | |
898b2979 | 816 | return -1; |
e2d118a1 | 817 | |
b05229f4 TH |
818 | if (gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM))) |
819 | return -1; | |
820 | ||
821 | err = __gre6_xmit(skb, dev, dsfield, &fl6, encap_limit, | |
822 | &mtu, skb->protocol); | |
c12b395a | 823 | if (err != 0) { |
824 | if (err == -EMSGSIZE) | |
825 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); | |
826 | return -1; | |
827 | } | |
828 | ||
829 | return 0; | |
830 | } | |
831 | ||
832 | /** | |
7ccbdff1 | 833 | * ip6gre_tnl_addr_conflict - compare packet addresses to tunnel's own |
c12b395a | 834 | * @t: the outgoing tunnel device |
835 | * @hdr: IPv6 header from the incoming packet | |
836 | * | |
837 | * Description: | |
838 | * Avoid trivial tunneling loop by checking that tunnel exit-point | |
839 | * doesn't match source of incoming packet. | |
840 | * | |
841 | * Return: | |
842 | * 1 if conflict, | |
843 | * 0 else | |
844 | **/ | |
845 | ||
846 | static inline bool ip6gre_tnl_addr_conflict(const struct ip6_tnl *t, | |
847 | const struct ipv6hdr *hdr) | |
848 | { | |
849 | return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); | |
850 | } | |
851 | ||
852 | static int ip6gre_xmit_other(struct sk_buff *skb, struct net_device *dev) | |
853 | { | |
854 | struct ip6_tnl *t = netdev_priv(dev); | |
855 | int encap_limit = -1; | |
856 | struct flowi6 fl6; | |
857 | __u32 mtu; | |
858 | int err; | |
859 | ||
860 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
861 | encap_limit = t->parms.encap_limit; | |
862 | ||
6712abc1 WT |
863 | if (!t->parms.collect_md) |
864 | memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); | |
c12b395a | 865 | |
b05229f4 TH |
866 | err = gre_handle_offloads(skb, !!(t->parms.o_flags & TUNNEL_CSUM)); |
867 | if (err) | |
868 | return err; | |
869 | ||
870 | err = __gre6_xmit(skb, dev, 0, &fl6, encap_limit, &mtu, skb->protocol); | |
c12b395a | 871 | |
872 | return err; | |
873 | } | |
874 | ||
875 | static netdev_tx_t ip6gre_tunnel_xmit(struct sk_buff *skb, | |
876 | struct net_device *dev) | |
877 | { | |
878 | struct ip6_tnl *t = netdev_priv(dev); | |
879 | struct net_device_stats *stats = &t->dev->stats; | |
880 | int ret; | |
881 | ||
cb9f1b78 WB |
882 | if (!pskb_inet_may_pull(skb)) |
883 | goto tx_err; | |
884 | ||
d5005140 | 885 | if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr)) |
41ab3e31 | 886 | goto tx_err; |
c12b395a | 887 | |
888 | switch (skb->protocol) { | |
889 | case htons(ETH_P_IP): | |
890 | ret = ip6gre_xmit_ipv4(skb, dev); | |
891 | break; | |
892 | case htons(ETH_P_IPV6): | |
893 | ret = ip6gre_xmit_ipv6(skb, dev); | |
894 | break; | |
895 | default: | |
896 | ret = ip6gre_xmit_other(skb, dev); | |
897 | break; | |
898 | } | |
899 | ||
900 | if (ret < 0) | |
901 | goto tx_err; | |
902 | ||
903 | return NETDEV_TX_OK; | |
904 | ||
905 | tx_err: | |
906 | stats->tx_errors++; | |
907 | stats->tx_dropped++; | |
908 | kfree_skb(skb); | |
909 | return NETDEV_TX_OK; | |
910 | } | |
911 | ||
5a963eb6 WT |
912 | static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb, |
913 | struct net_device *dev) | |
914 | { | |
5a963eb6 WT |
915 | struct ip6_tnl *t = netdev_priv(dev); |
916 | struct dst_entry *dst = skb_dst(skb); | |
917 | struct net_device_stats *stats; | |
918 | bool truncate = false; | |
919 | int encap_limit = -1; | |
920 | __u8 dsfield = false; | |
921 | struct flowi6 fl6; | |
922 | int err = -EINVAL; | |
20704bd1 | 923 | __be16 proto; |
5a963eb6 | 924 | __u32 mtu; |
1baf5ebf | 925 | int nhoff; |
d5db21a3 | 926 | int thoff; |
5a963eb6 | 927 | |
cb9f1b78 WB |
928 | if (!pskb_inet_may_pull(skb)) |
929 | goto tx_err; | |
930 | ||
5a963eb6 WT |
931 | if (!ip6_tnl_xmit_ctl(t, &t->parms.laddr, &t->parms.raddr)) |
932 | goto tx_err; | |
933 | ||
934 | if (gre_handle_offloads(skb, false)) | |
935 | goto tx_err; | |
936 | ||
5a963eb6 WT |
937 | if (skb->len > dev->mtu + dev->hard_header_len) { |
938 | pskb_trim(skb, dev->mtu + dev->hard_header_len); | |
939 | truncate = true; | |
940 | } | |
941 | ||
1baf5ebf WT |
942 | nhoff = skb_network_header(skb) - skb_mac_header(skb); |
943 | if (skb->protocol == htons(ETH_P_IP) && | |
944 | (ntohs(ip_hdr(skb)->tot_len) > skb->len - nhoff)) | |
945 | truncate = true; | |
946 | ||
d5db21a3 WT |
947 | thoff = skb_transport_header(skb) - skb_mac_header(skb); |
948 | if (skb->protocol == htons(ETH_P_IPV6) && | |
949 | (ntohs(ipv6_hdr(skb)->payload_len) > skb->len - thoff)) | |
950 | truncate = true; | |
951 | ||
5691484d | 952 | if (skb_cow_head(skb, dev->needed_headroom ?: t->hlen)) |
e41c7c68 WT |
953 | goto tx_err; |
954 | ||
5a963eb6 | 955 | t->parms.o_flags &= ~TUNNEL_KEY; |
5a963eb6 | 956 | IPCB(skb)->flags = 0; |
ef7baf5e WT |
957 | |
958 | /* For collect_md mode, derive fl6 from the tunnel key, | |
959 | * for native mode, call prepare_ip6gre_xmit_{ipv4,ipv6}. | |
960 | */ | |
961 | if (t->parms.collect_md) { | |
962 | struct ip_tunnel_info *tun_info; | |
963 | const struct ip_tunnel_key *key; | |
964 | struct erspan_metadata *md; | |
c69de58b | 965 | __be32 tun_id; |
ef7baf5e WT |
966 | |
967 | tun_info = skb_tunnel_info(skb); | |
968 | if (unlikely(!tun_info || | |
969 | !(tun_info->mode & IP_TUNNEL_INFO_TX) || | |
970 | ip_tunnel_info_af(tun_info) != AF_INET6)) | |
28e48603 | 971 | goto tx_err; |
ef7baf5e WT |
972 | |
973 | key = &tun_info->key; | |
974 | memset(&fl6, 0, sizeof(fl6)); | |
975 | fl6.flowi6_proto = IPPROTO_GRE; | |
976 | fl6.daddr = key->u.ipv6.dst; | |
977 | fl6.flowlabel = key->label; | |
978 | fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL); | |
979 | ||
980 | dsfield = key->tos; | |
256c87c1 PJV |
981 | if (!(tun_info->key.tun_flags & TUNNEL_ERSPAN_OPT)) |
982 | goto tx_err; | |
2eb8d6d2 | 983 | if (tun_info->options_len < sizeof(*md)) |
ef7baf5e | 984 | goto tx_err; |
2eb8d6d2 | 985 | md = ip_tunnel_info_opts(tun_info); |
ef7baf5e | 986 | |
c69de58b | 987 | tun_id = tunnel_id_to_key32(key->tun_id); |
94d7d8f2 WT |
988 | if (md->version == 1) { |
989 | erspan_build_header(skb, | |
c69de58b | 990 | ntohl(tun_id), |
94d7d8f2 WT |
991 | ntohl(md->u.index), truncate, |
992 | false); | |
993 | } else if (md->version == 2) { | |
94d7d8f2 | 994 | erspan_build_header_v2(skb, |
c69de58b WT |
995 | ntohl(tun_id), |
996 | md->u.md2.dir, | |
997 | get_hwid(&md->u.md2), | |
998 | truncate, false); | |
d6aa7119 WT |
999 | } else { |
1000 | goto tx_err; | |
94d7d8f2 | 1001 | } |
ef7baf5e WT |
1002 | } else { |
1003 | switch (skb->protocol) { | |
1004 | case htons(ETH_P_IP): | |
1005 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); | |
1006 | prepare_ip6gre_xmit_ipv4(skb, dev, &fl6, | |
1007 | &dsfield, &encap_limit); | |
1008 | break; | |
1009 | case htons(ETH_P_IPV6): | |
cb9f1b78 | 1010 | if (ipv6_addr_equal(&t->parms.raddr, &ipv6_hdr(skb)->saddr)) |
ef7baf5e WT |
1011 | goto tx_err; |
1012 | if (prepare_ip6gre_xmit_ipv6(skb, dev, &fl6, | |
1013 | &dsfield, &encap_limit)) | |
1014 | goto tx_err; | |
1015 | break; | |
1016 | default: | |
1017 | memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6)); | |
1018 | break; | |
1019 | } | |
1020 | ||
94d7d8f2 | 1021 | if (t->parms.erspan_ver == 1) |
c69de58b | 1022 | erspan_build_header(skb, ntohl(t->parms.o_key), |
94d7d8f2 WT |
1023 | t->parms.index, |
1024 | truncate, false); | |
02f99df1 | 1025 | else if (t->parms.erspan_ver == 2) |
c69de58b | 1026 | erspan_build_header_v2(skb, ntohl(t->parms.o_key), |
94d7d8f2 WT |
1027 | t->parms.dir, |
1028 | t->parms.hwid, | |
1029 | truncate, false); | |
02f99df1 WT |
1030 | else |
1031 | goto tx_err; | |
1032 | ||
ef7baf5e WT |
1033 | fl6.daddr = t->parms.raddr; |
1034 | } | |
5a963eb6 WT |
1035 | |
1036 | /* Push GRE header. */ | |
20704bd1 XL |
1037 | proto = (t->parms.erspan_ver == 1) ? htons(ETH_P_ERSPAN) |
1038 | : htons(ETH_P_ERSPAN2); | |
1039 | gre_build_header(skb, 8, TUNNEL_SEQ, proto, 0, htonl(t->o_seqno++)); | |
5a963eb6 WT |
1040 | |
1041 | /* TooBig packet may have updated dst->dev's mtu */ | |
ef7baf5e | 1042 | if (!t->parms.collect_md && dst && dst_mtu(dst) > dst->dev->mtu) |
5a963eb6 WT |
1043 | dst->ops->update_pmtu(dst, NULL, skb, dst->dev->mtu); |
1044 | ||
1045 | err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu, | |
1046 | NEXTHDR_GRE); | |
1047 | if (err != 0) { | |
1048 | /* XXX: send ICMP error even if DF is not set. */ | |
1049 | if (err == -EMSGSIZE) { | |
1050 | if (skb->protocol == htons(ETH_P_IP)) | |
1051 | icmp_send(skb, ICMP_DEST_UNREACH, | |
1052 | ICMP_FRAG_NEEDED, htonl(mtu)); | |
1053 | else | |
1054 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); | |
1055 | } | |
1056 | ||
1057 | goto tx_err; | |
1058 | } | |
1059 | return NETDEV_TX_OK; | |
1060 | ||
1061 | tx_err: | |
1062 | stats = &t->dev->stats; | |
1063 | stats->tx_errors++; | |
1064 | stats->tx_dropped++; | |
1065 | kfree_skb(skb); | |
1066 | return NETDEV_TX_OK; | |
1067 | } | |
1068 | ||
a483373e | 1069 | static void ip6gre_tnl_link_config_common(struct ip6_tnl *t) |
c12b395a | 1070 | { |
1071 | struct net_device *dev = t->dev; | |
1072 | struct __ip6_tnl_parm *p = &t->parms; | |
1073 | struct flowi6 *fl6 = &t->fl.u.ip6; | |
c12b395a | 1074 | |
1075 | if (dev->type != ARPHRD_ETHER) { | |
1076 | memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); | |
1077 | memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); | |
1078 | } | |
1079 | ||
1080 | /* Set up flowi template */ | |
1081 | fl6->saddr = p->laddr; | |
1082 | fl6->daddr = p->raddr; | |
1083 | fl6->flowi6_oif = p->link; | |
1084 | fl6->flowlabel = 0; | |
252f3f5a | 1085 | fl6->flowi6_proto = IPPROTO_GRE; |
c12b395a | 1086 | |
1087 | if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS)) | |
1088 | fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo; | |
1089 | if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL)) | |
1090 | fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo; | |
1091 | ||
1092 | p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET); | |
1093 | p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr); | |
1094 | ||
1095 | if (p->flags&IP6_TNL_F_CAP_XMIT && | |
1096 | p->flags&IP6_TNL_F_CAP_RCV && dev->type != ARPHRD_ETHER) | |
1097 | dev->flags |= IFF_POINTOPOINT; | |
1098 | else | |
1099 | dev->flags &= ~IFF_POINTOPOINT; | |
a483373e | 1100 | } |
c12b395a | 1101 | |
a483373e PM |
1102 | static void ip6gre_tnl_link_config_route(struct ip6_tnl *t, int set_mtu, |
1103 | int t_hlen) | |
1104 | { | |
1105 | const struct __ip6_tnl_parm *p = &t->parms; | |
1106 | struct net_device *dev = t->dev; | |
c12b395a | 1107 | |
1108 | if (p->flags & IP6_TNL_F_CAP_XMIT) { | |
1109 | int strict = (ipv6_addr_type(&p->raddr) & | |
1110 | (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)); | |
1111 | ||
22f08069 | 1112 | struct rt6_info *rt = rt6_lookup(t->net, |
c12b395a | 1113 | &p->raddr, &p->laddr, |
b75cc8f9 | 1114 | p->link, NULL, strict); |
c12b395a | 1115 | |
63159f29 | 1116 | if (!rt) |
c12b395a | 1117 | return; |
1118 | ||
1119 | if (rt->dst.dev) { | |
eb95f52f | 1120 | dev->needed_headroom = rt->dst.dev->hard_header_len + |
db2ec95d | 1121 | t_hlen; |
c12b395a | 1122 | |
1123 | if (set_mtu) { | |
db2ec95d | 1124 | dev->mtu = rt->dst.dev->mtu - t_hlen; |
c12b395a | 1125 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
1126 | dev->mtu -= 8; | |
a9e242ca AD |
1127 | if (dev->type == ARPHRD_ETHER) |
1128 | dev->mtu -= ETH_HLEN; | |
c12b395a | 1129 | |
1130 | if (dev->mtu < IPV6_MIN_MTU) | |
1131 | dev->mtu = IPV6_MIN_MTU; | |
1132 | } | |
1133 | } | |
94e187c0 | 1134 | ip6_rt_put(rt); |
c12b395a | 1135 | } |
c12b395a | 1136 | } |
1137 | ||
a483373e PM |
1138 | static int ip6gre_calc_hlen(struct ip6_tnl *tunnel) |
1139 | { | |
1140 | int t_hlen; | |
1141 | ||
1142 | tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags); | |
1143 | tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; | |
1144 | ||
1145 | t_hlen = tunnel->hlen + sizeof(struct ipv6hdr); | |
eb95f52f | 1146 | tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen; |
a483373e PM |
1147 | return t_hlen; |
1148 | } | |
1149 | ||
1150 | static void ip6gre_tnl_link_config(struct ip6_tnl *t, int set_mtu) | |
1151 | { | |
1152 | ip6gre_tnl_link_config_common(t); | |
1153 | ip6gre_tnl_link_config_route(t, set_mtu, ip6gre_calc_hlen(t)); | |
1154 | } | |
1155 | ||
a6465350 PM |
1156 | static void ip6gre_tnl_copy_tnl_parm(struct ip6_tnl *t, |
1157 | const struct __ip6_tnl_parm *p) | |
c12b395a | 1158 | { |
1159 | t->parms.laddr = p->laddr; | |
1160 | t->parms.raddr = p->raddr; | |
1161 | t->parms.flags = p->flags; | |
1162 | t->parms.hop_limit = p->hop_limit; | |
1163 | t->parms.encap_limit = p->encap_limit; | |
1164 | t->parms.flowinfo = p->flowinfo; | |
1165 | t->parms.link = p->link; | |
1166 | t->parms.proto = p->proto; | |
1167 | t->parms.i_key = p->i_key; | |
1168 | t->parms.o_key = p->o_key; | |
1169 | t->parms.i_flags = p->i_flags; | |
1170 | t->parms.o_flags = p->o_flags; | |
0a473b82 | 1171 | t->parms.fwmark = p->fwmark; |
80b3671e HL |
1172 | t->parms.erspan_ver = p->erspan_ver; |
1173 | t->parms.index = p->index; | |
1174 | t->parms.dir = p->dir; | |
1175 | t->parms.hwid = p->hwid; | |
607f725f | 1176 | dst_cache_reset(&t->dst_cache); |
a6465350 PM |
1177 | } |
1178 | ||
1179 | static int ip6gre_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p, | |
1180 | int set_mtu) | |
1181 | { | |
1182 | ip6gre_tnl_copy_tnl_parm(t, p); | |
c12b395a | 1183 | ip6gre_tnl_link_config(t, set_mtu); |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static void ip6gre_tnl_parm_from_user(struct __ip6_tnl_parm *p, | |
1188 | const struct ip6_tnl_parm2 *u) | |
1189 | { | |
1190 | p->laddr = u->laddr; | |
1191 | p->raddr = u->raddr; | |
1192 | p->flags = u->flags; | |
1193 | p->hop_limit = u->hop_limit; | |
1194 | p->encap_limit = u->encap_limit; | |
1195 | p->flowinfo = u->flowinfo; | |
1196 | p->link = u->link; | |
1197 | p->i_key = u->i_key; | |
1198 | p->o_key = u->o_key; | |
f41fe3c2 TH |
1199 | p->i_flags = gre_flags_to_tnl_flags(u->i_flags); |
1200 | p->o_flags = gre_flags_to_tnl_flags(u->o_flags); | |
c12b395a | 1201 | memcpy(p->name, u->name, sizeof(u->name)); |
1202 | } | |
1203 | ||
1204 | static void ip6gre_tnl_parm_to_user(struct ip6_tnl_parm2 *u, | |
1205 | const struct __ip6_tnl_parm *p) | |
1206 | { | |
1207 | u->proto = IPPROTO_GRE; | |
1208 | u->laddr = p->laddr; | |
1209 | u->raddr = p->raddr; | |
1210 | u->flags = p->flags; | |
1211 | u->hop_limit = p->hop_limit; | |
1212 | u->encap_limit = p->encap_limit; | |
1213 | u->flowinfo = p->flowinfo; | |
1214 | u->link = p->link; | |
1215 | u->i_key = p->i_key; | |
1216 | u->o_key = p->o_key; | |
f41fe3c2 TH |
1217 | u->i_flags = gre_tnl_flags_to_gre_flags(p->i_flags); |
1218 | u->o_flags = gre_tnl_flags_to_gre_flags(p->o_flags); | |
c12b395a | 1219 | memcpy(u->name, p->name, sizeof(u->name)); |
1220 | } | |
1221 | ||
1222 | static int ip6gre_tunnel_ioctl(struct net_device *dev, | |
1223 | struct ifreq *ifr, int cmd) | |
1224 | { | |
1225 | int err = 0; | |
1226 | struct ip6_tnl_parm2 p; | |
1227 | struct __ip6_tnl_parm p1; | |
22f08069 ND |
1228 | struct ip6_tnl *t = netdev_priv(dev); |
1229 | struct net *net = t->net; | |
c12b395a | 1230 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); |
1231 | ||
308edfdf TH |
1232 | memset(&p1, 0, sizeof(p1)); |
1233 | ||
c12b395a | 1234 | switch (cmd) { |
1235 | case SIOCGETTUNNEL: | |
c12b395a | 1236 | if (dev == ign->fb_tunnel_dev) { |
1237 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { | |
1238 | err = -EFAULT; | |
1239 | break; | |
1240 | } | |
1241 | ip6gre_tnl_parm_from_user(&p1, &p); | |
1242 | t = ip6gre_tunnel_locate(net, &p1, 0); | |
63159f29 | 1243 | if (!t) |
22f08069 | 1244 | t = netdev_priv(dev); |
c12b395a | 1245 | } |
5dbd5068 | 1246 | memset(&p, 0, sizeof(p)); |
c12b395a | 1247 | ip6gre_tnl_parm_to_user(&p, &t->parms); |
1248 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) | |
1249 | err = -EFAULT; | |
1250 | break; | |
1251 | ||
1252 | case SIOCADDTUNNEL: | |
1253 | case SIOCCHGTUNNEL: | |
1254 | err = -EPERM; | |
af31f412 | 1255 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c12b395a | 1256 | goto done; |
1257 | ||
1258 | err = -EFAULT; | |
1259 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1260 | goto done; | |
1261 | ||
1262 | err = -EINVAL; | |
1263 | if ((p.i_flags|p.o_flags)&(GRE_VERSION|GRE_ROUTING)) | |
1264 | goto done; | |
1265 | ||
1266 | if (!(p.i_flags&GRE_KEY)) | |
1267 | p.i_key = 0; | |
1268 | if (!(p.o_flags&GRE_KEY)) | |
1269 | p.o_key = 0; | |
1270 | ||
1271 | ip6gre_tnl_parm_from_user(&p1, &p); | |
1272 | t = ip6gre_tunnel_locate(net, &p1, cmd == SIOCADDTUNNEL); | |
1273 | ||
1274 | if (dev != ign->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { | |
53b24b8f | 1275 | if (t) { |
c12b395a | 1276 | if (t->dev != dev) { |
1277 | err = -EEXIST; | |
1278 | break; | |
1279 | } | |
1280 | } else { | |
1281 | t = netdev_priv(dev); | |
1282 | ||
1283 | ip6gre_tunnel_unlink(ign, t); | |
1284 | synchronize_net(); | |
1285 | ip6gre_tnl_change(t, &p1, 1); | |
1286 | ip6gre_tunnel_link(ign, t); | |
1287 | netdev_state_change(dev); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | if (t) { | |
1292 | err = 0; | |
1293 | ||
5dbd5068 | 1294 | memset(&p, 0, sizeof(p)); |
c12b395a | 1295 | ip6gre_tnl_parm_to_user(&p, &t->parms); |
1296 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) | |
1297 | err = -EFAULT; | |
1298 | } else | |
1299 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); | |
1300 | break; | |
1301 | ||
1302 | case SIOCDELTUNNEL: | |
1303 | err = -EPERM; | |
af31f412 | 1304 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
c12b395a | 1305 | goto done; |
1306 | ||
1307 | if (dev == ign->fb_tunnel_dev) { | |
1308 | err = -EFAULT; | |
1309 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1310 | goto done; | |
1311 | err = -ENOENT; | |
1312 | ip6gre_tnl_parm_from_user(&p1, &p); | |
1313 | t = ip6gre_tunnel_locate(net, &p1, 0); | |
63159f29 | 1314 | if (!t) |
c12b395a | 1315 | goto done; |
1316 | err = -EPERM; | |
1317 | if (t == netdev_priv(ign->fb_tunnel_dev)) | |
1318 | goto done; | |
1319 | dev = t->dev; | |
1320 | } | |
1321 | unregister_netdevice(dev); | |
1322 | err = 0; | |
1323 | break; | |
1324 | ||
1325 | default: | |
1326 | err = -EINVAL; | |
1327 | } | |
1328 | ||
1329 | done: | |
1330 | return err; | |
1331 | } | |
1332 | ||
c12b395a | 1333 | static int ip6gre_header(struct sk_buff *skb, struct net_device *dev, |
76cc0d32 XL |
1334 | unsigned short type, const void *daddr, |
1335 | const void *saddr, unsigned int len) | |
c12b395a | 1336 | { |
1337 | struct ip6_tnl *t = netdev_priv(dev); | |
76cc0d32 XL |
1338 | struct ipv6hdr *ipv6h; |
1339 | __be16 *p; | |
c12b395a | 1340 | |
76cc0d32 XL |
1341 | ipv6h = skb_push(skb, t->hlen + sizeof(*ipv6h)); |
1342 | ip6_flow_hdr(ipv6h, 0, ip6_make_flowlabel(dev_net(dev), skb, | |
1343 | t->fl.u.ip6.flowlabel, | |
1344 | true, &t->fl.u.ip6)); | |
c12b395a | 1345 | ipv6h->hop_limit = t->parms.hop_limit; |
1346 | ipv6h->nexthdr = NEXTHDR_GRE; | |
1347 | ipv6h->saddr = t->parms.laddr; | |
1348 | ipv6h->daddr = t->parms.raddr; | |
1349 | ||
76cc0d32 XL |
1350 | p = (__be16 *)(ipv6h + 1); |
1351 | p[0] = t->parms.o_flags; | |
1352 | p[1] = htons(type); | |
c12b395a | 1353 | |
1354 | /* | |
1355 | * Set the source hardware address. | |
1356 | */ | |
1357 | ||
1358 | if (saddr) | |
1359 | memcpy(&ipv6h->saddr, saddr, sizeof(struct in6_addr)); | |
1360 | if (daddr) | |
1361 | memcpy(&ipv6h->daddr, daddr, sizeof(struct in6_addr)); | |
1362 | if (!ipv6_addr_any(&ipv6h->daddr)) | |
1363 | return t->hlen; | |
1364 | ||
1365 | return -t->hlen; | |
1366 | } | |
1367 | ||
c12b395a | 1368 | static const struct header_ops ip6gre_header_ops = { |
1369 | .create = ip6gre_header, | |
c12b395a | 1370 | }; |
1371 | ||
1372 | static const struct net_device_ops ip6gre_netdev_ops = { | |
1373 | .ndo_init = ip6gre_tunnel_init, | |
1374 | .ndo_uninit = ip6gre_tunnel_uninit, | |
1375 | .ndo_start_xmit = ip6gre_tunnel_xmit, | |
1376 | .ndo_do_ioctl = ip6gre_tunnel_ioctl, | |
b05229f4 | 1377 | .ndo_change_mtu = ip6_tnl_change_mtu, |
f61dd388 | 1378 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
ecf2c06a | 1379 | .ndo_get_iflink = ip6_tnl_get_iflink, |
c12b395a | 1380 | }; |
1381 | ||
1382 | static void ip6gre_dev_free(struct net_device *dev) | |
1383 | { | |
cdf3464e MKL |
1384 | struct ip6_tnl *t = netdev_priv(dev); |
1385 | ||
0c1dd2a1 | 1386 | gro_cells_destroy(&t->gro_cells); |
607f725f | 1387 | dst_cache_destroy(&t->dst_cache); |
c12b395a | 1388 | free_percpu(dev->tstats); |
c12b395a | 1389 | } |
1390 | ||
1391 | static void ip6gre_tunnel_setup(struct net_device *dev) | |
1392 | { | |
c12b395a | 1393 | dev->netdev_ops = &ip6gre_netdev_ops; |
cf124db5 DM |
1394 | dev->needs_free_netdev = true; |
1395 | dev->priv_destructor = ip6gre_dev_free; | |
c12b395a | 1396 | |
1397 | dev->type = ARPHRD_IP6GRE; | |
b05229f4 | 1398 | |
c12b395a | 1399 | dev->flags |= IFF_NOARP; |
c12b395a | 1400 | dev->addr_len = sizeof(struct in6_addr); |
02875878 | 1401 | netif_keep_dst(dev); |
45ce0fd1 FJ |
1402 | /* This perm addr will be used as interface identifier by IPv6 */ |
1403 | dev->addr_assign_type = NET_ADDR_RANDOM; | |
1404 | eth_random_addr(dev->perm_addr); | |
c12b395a | 1405 | } |
1406 | ||
e5a9336a AK |
1407 | #define GRE6_FEATURES (NETIF_F_SG | \ |
1408 | NETIF_F_FRAGLIST | \ | |
1409 | NETIF_F_HIGHDMA | \ | |
1410 | NETIF_F_HW_CSUM) | |
1411 | ||
1412 | static void ip6gre_tnl_init_features(struct net_device *dev) | |
1413 | { | |
1414 | struct ip6_tnl *nt = netdev_priv(dev); | |
1415 | ||
1416 | dev->features |= GRE6_FEATURES; | |
1417 | dev->hw_features |= GRE6_FEATURES; | |
1418 | ||
1419 | if (!(nt->parms.o_flags & TUNNEL_SEQ)) { | |
1420 | /* TCP offload with GRE SEQ is not supported, nor | |
1421 | * can we support 2 levels of outer headers requiring | |
1422 | * an update. | |
1423 | */ | |
1424 | if (!(nt->parms.o_flags & TUNNEL_CSUM) || | |
1425 | nt->encap.type == TUNNEL_ENCAP_NONE) { | |
1426 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1427 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
1428 | } | |
1429 | ||
1430 | /* Can use a lockless transmit, unless we generate | |
1431 | * output sequences | |
1432 | */ | |
1433 | dev->features |= NETIF_F_LLTX; | |
1434 | } | |
1435 | } | |
1436 | ||
a3c119d3 | 1437 | static int ip6gre_tunnel_init_common(struct net_device *dev) |
c12b395a | 1438 | { |
1439 | struct ip6_tnl *tunnel; | |
cdf3464e | 1440 | int ret; |
b05229f4 | 1441 | int t_hlen; |
c12b395a | 1442 | |
1443 | tunnel = netdev_priv(dev); | |
1444 | ||
1445 | tunnel->dev = dev; | |
0bd87628 | 1446 | tunnel->net = dev_net(dev); |
c12b395a | 1447 | strcpy(tunnel->parms.name, dev->name); |
1448 | ||
a3c119d3 MKL |
1449 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
1450 | if (!dev->tstats) | |
1451 | return -ENOMEM; | |
1452 | ||
607f725f | 1453 | ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); |
0c1dd2a1 EBE |
1454 | if (ret) |
1455 | goto cleanup_alloc_pcpu_stats; | |
1456 | ||
1457 | ret = gro_cells_init(&tunnel->gro_cells, dev); | |
1458 | if (ret) | |
1459 | goto cleanup_dst_cache_init; | |
cdf3464e | 1460 | |
a483373e | 1461 | t_hlen = ip6gre_calc_hlen(tunnel); |
db2ec95d | 1462 | dev->mtu = ETH_DATA_LEN - t_hlen; |
1b227e53 HY |
1463 | if (dev->type == ARPHRD_ETHER) |
1464 | dev->mtu -= ETH_HLEN; | |
b05229f4 TH |
1465 | if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
1466 | dev->mtu -= 8; | |
1467 | ||
6712abc1 WT |
1468 | if (tunnel->parms.collect_md) { |
1469 | dev->features |= NETIF_F_NETNS_LOCAL; | |
1470 | netif_keep_dst(dev); | |
1471 | } | |
e5a9336a | 1472 | ip6gre_tnl_init_features(dev); |
6712abc1 | 1473 | |
a3c119d3 | 1474 | return 0; |
0c1dd2a1 EBE |
1475 | |
1476 | cleanup_dst_cache_init: | |
1477 | dst_cache_destroy(&tunnel->dst_cache); | |
1478 | cleanup_alloc_pcpu_stats: | |
1479 | free_percpu(dev->tstats); | |
1480 | dev->tstats = NULL; | |
1481 | return ret; | |
a3c119d3 MKL |
1482 | } |
1483 | ||
1484 | static int ip6gre_tunnel_init(struct net_device *dev) | |
1485 | { | |
1486 | struct ip6_tnl *tunnel; | |
1487 | int ret; | |
1488 | ||
1489 | ret = ip6gre_tunnel_init_common(dev); | |
1490 | if (ret) | |
1491 | return ret; | |
1492 | ||
1493 | tunnel = netdev_priv(dev); | |
1494 | ||
6712abc1 WT |
1495 | if (tunnel->parms.collect_md) |
1496 | return 0; | |
1497 | ||
c12b395a | 1498 | memcpy(dev->dev_addr, &tunnel->parms.laddr, sizeof(struct in6_addr)); |
1499 | memcpy(dev->broadcast, &tunnel->parms.raddr, sizeof(struct in6_addr)); | |
1500 | ||
1501 | if (ipv6_addr_any(&tunnel->parms.raddr)) | |
1502 | dev->header_ops = &ip6gre_header_ops; | |
1503 | ||
c12b395a | 1504 | return 0; |
1505 | } | |
1506 | ||
1507 | static void ip6gre_fb_tunnel_init(struct net_device *dev) | |
1508 | { | |
1509 | struct ip6_tnl *tunnel = netdev_priv(dev); | |
1510 | ||
1511 | tunnel->dev = dev; | |
0bd87628 | 1512 | tunnel->net = dev_net(dev); |
c12b395a | 1513 | strcpy(tunnel->parms.name, dev->name); |
1514 | ||
1515 | tunnel->hlen = sizeof(struct ipv6hdr) + 4; | |
1516 | ||
1517 | dev_hold(dev); | |
1518 | } | |
1519 | ||
c12b395a | 1520 | static struct inet6_protocol ip6gre_protocol __read_mostly = { |
308edfdf | 1521 | .handler = gre_rcv, |
c12b395a | 1522 | .err_handler = ip6gre_err, |
1523 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1524 | }; | |
1525 | ||
22f08069 | 1526 | static void ip6gre_destroy_tunnels(struct net *net, struct list_head *head) |
c12b395a | 1527 | { |
22f08069 ND |
1528 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); |
1529 | struct net_device *dev, *aux; | |
c12b395a | 1530 | int prio; |
1531 | ||
22f08069 ND |
1532 | for_each_netdev_safe(net, dev, aux) |
1533 | if (dev->rtnl_link_ops == &ip6gre_link_ops || | |
5a963eb6 WT |
1534 | dev->rtnl_link_ops == &ip6gre_tap_ops || |
1535 | dev->rtnl_link_ops == &ip6erspan_tap_ops) | |
22f08069 ND |
1536 | unregister_netdevice_queue(dev, head); |
1537 | ||
c12b395a | 1538 | for (prio = 0; prio < 4; prio++) { |
1539 | int h; | |
e87a8f24 | 1540 | for (h = 0; h < IP6_GRE_HASH_SIZE; h++) { |
c12b395a | 1541 | struct ip6_tnl *t; |
1542 | ||
1543 | t = rtnl_dereference(ign->tunnels[prio][h]); | |
1544 | ||
53b24b8f | 1545 | while (t) { |
22f08069 ND |
1546 | /* If dev is in the same netns, it has already |
1547 | * been added to the list by the previous loop. | |
1548 | */ | |
1549 | if (!net_eq(dev_net(t->dev), net)) | |
1550 | unregister_netdevice_queue(t->dev, | |
1551 | head); | |
c12b395a | 1552 | t = rtnl_dereference(t->next); |
1553 | } | |
1554 | } | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | static int __net_init ip6gre_init_net(struct net *net) | |
1559 | { | |
1560 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); | |
1561 | int err; | |
1562 | ||
79134e6c ED |
1563 | if (!net_has_fallback_tunnels(net)) |
1564 | return 0; | |
c12b395a | 1565 | ign->fb_tunnel_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6gre0", |
c835a677 TG |
1566 | NET_NAME_UNKNOWN, |
1567 | ip6gre_tunnel_setup); | |
c12b395a | 1568 | if (!ign->fb_tunnel_dev) { |
1569 | err = -ENOMEM; | |
1570 | goto err_alloc_dev; | |
1571 | } | |
1572 | dev_net_set(ign->fb_tunnel_dev, net); | |
22f08069 ND |
1573 | /* FB netdevice is special: we have one, and only one per netns. |
1574 | * Allowing to move it to another netns is clearly unsafe. | |
1575 | */ | |
1576 | ign->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL; | |
1577 | ||
c12b395a | 1578 | |
1579 | ip6gre_fb_tunnel_init(ign->fb_tunnel_dev); | |
1580 | ign->fb_tunnel_dev->rtnl_link_ops = &ip6gre_link_ops; | |
1581 | ||
1582 | err = register_netdev(ign->fb_tunnel_dev); | |
1583 | if (err) | |
1584 | goto err_reg_dev; | |
1585 | ||
1586 | rcu_assign_pointer(ign->tunnels_wc[0], | |
1587 | netdev_priv(ign->fb_tunnel_dev)); | |
1588 | return 0; | |
1589 | ||
1590 | err_reg_dev: | |
cf124db5 | 1591 | free_netdev(ign->fb_tunnel_dev); |
c12b395a | 1592 | err_alloc_dev: |
1593 | return err; | |
1594 | } | |
1595 | ||
bb401cae | 1596 | static void __net_exit ip6gre_exit_batch_net(struct list_head *net_list) |
c12b395a | 1597 | { |
bb401cae | 1598 | struct net *net; |
c12b395a | 1599 | LIST_HEAD(list); |
1600 | ||
c12b395a | 1601 | rtnl_lock(); |
bb401cae ED |
1602 | list_for_each_entry(net, net_list, exit_list) |
1603 | ip6gre_destroy_tunnels(net, &list); | |
c12b395a | 1604 | unregister_netdevice_many(&list); |
1605 | rtnl_unlock(); | |
1606 | } | |
1607 | ||
1608 | static struct pernet_operations ip6gre_net_ops = { | |
1609 | .init = ip6gre_init_net, | |
bb401cae | 1610 | .exit_batch = ip6gre_exit_batch_net, |
c12b395a | 1611 | .id = &ip6gre_net_id, |
1612 | .size = sizeof(struct ip6gre_net), | |
1613 | }; | |
1614 | ||
a8b8a889 MS |
1615 | static int ip6gre_tunnel_validate(struct nlattr *tb[], struct nlattr *data[], |
1616 | struct netlink_ext_ack *extack) | |
c12b395a | 1617 | { |
1618 | __be16 flags; | |
1619 | ||
1620 | if (!data) | |
1621 | return 0; | |
1622 | ||
1623 | flags = 0; | |
1624 | if (data[IFLA_GRE_IFLAGS]) | |
1625 | flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]); | |
1626 | if (data[IFLA_GRE_OFLAGS]) | |
1627 | flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]); | |
1628 | if (flags & (GRE_VERSION|GRE_ROUTING)) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
a8b8a889 MS |
1634 | static int ip6gre_tap_validate(struct nlattr *tb[], struct nlattr *data[], |
1635 | struct netlink_ext_ack *extack) | |
c12b395a | 1636 | { |
1637 | struct in6_addr daddr; | |
1638 | ||
1639 | if (tb[IFLA_ADDRESS]) { | |
1640 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1641 | return -EINVAL; | |
1642 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1643 | return -EADDRNOTAVAIL; | |
1644 | } | |
1645 | ||
1646 | if (!data) | |
1647 | goto out; | |
1648 | ||
1649 | if (data[IFLA_GRE_REMOTE]) { | |
67b61f6c | 1650 | daddr = nla_get_in6_addr(data[IFLA_GRE_REMOTE]); |
c12b395a | 1651 | if (ipv6_addr_any(&daddr)) |
1652 | return -EINVAL; | |
1653 | } | |
1654 | ||
1655 | out: | |
a8b8a889 | 1656 | return ip6gre_tunnel_validate(tb, data, extack); |
c12b395a | 1657 | } |
1658 | ||
5a963eb6 WT |
1659 | static int ip6erspan_tap_validate(struct nlattr *tb[], struct nlattr *data[], |
1660 | struct netlink_ext_ack *extack) | |
1661 | { | |
1662 | __be16 flags = 0; | |
94d7d8f2 | 1663 | int ret, ver = 0; |
5a963eb6 WT |
1664 | |
1665 | if (!data) | |
1666 | return 0; | |
1667 | ||
1668 | ret = ip6gre_tap_validate(tb, data, extack); | |
1669 | if (ret) | |
1670 | return ret; | |
1671 | ||
1672 | /* ERSPAN should only have GRE sequence and key flag */ | |
1673 | if (data[IFLA_GRE_OFLAGS]) | |
1674 | flags |= nla_get_be16(data[IFLA_GRE_OFLAGS]); | |
1675 | if (data[IFLA_GRE_IFLAGS]) | |
1676 | flags |= nla_get_be16(data[IFLA_GRE_IFLAGS]); | |
1677 | if (!data[IFLA_GRE_COLLECT_METADATA] && | |
1678 | flags != (GRE_SEQ | GRE_KEY)) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | /* ERSPAN Session ID only has 10-bit. Since we reuse | |
1682 | * 32-bit key field as ID, check it's range. | |
1683 | */ | |
1684 | if (data[IFLA_GRE_IKEY] && | |
1685 | (ntohl(nla_get_be32(data[IFLA_GRE_IKEY])) & ~ID_MASK)) | |
1686 | return -EINVAL; | |
1687 | ||
1688 | if (data[IFLA_GRE_OKEY] && | |
1689 | (ntohl(nla_get_be32(data[IFLA_GRE_OKEY])) & ~ID_MASK)) | |
1690 | return -EINVAL; | |
1691 | ||
94d7d8f2 WT |
1692 | if (data[IFLA_GRE_ERSPAN_VER]) { |
1693 | ver = nla_get_u8(data[IFLA_GRE_ERSPAN_VER]); | |
1694 | if (ver != 1 && ver != 2) | |
5a963eb6 WT |
1695 | return -EINVAL; |
1696 | } | |
94d7d8f2 WT |
1697 | |
1698 | if (ver == 1) { | |
1699 | if (data[IFLA_GRE_ERSPAN_INDEX]) { | |
1700 | u32 index = nla_get_u32(data[IFLA_GRE_ERSPAN_INDEX]); | |
1701 | ||
1702 | if (index & ~INDEX_MASK) | |
1703 | return -EINVAL; | |
1704 | } | |
1705 | } else if (ver == 2) { | |
1706 | if (data[IFLA_GRE_ERSPAN_DIR]) { | |
1707 | u16 dir = nla_get_u8(data[IFLA_GRE_ERSPAN_DIR]); | |
1708 | ||
1709 | if (dir & ~(DIR_MASK >> DIR_OFFSET)) | |
1710 | return -EINVAL; | |
1711 | } | |
1712 | ||
1713 | if (data[IFLA_GRE_ERSPAN_HWID]) { | |
1714 | u16 hwid = nla_get_u16(data[IFLA_GRE_ERSPAN_HWID]); | |
1715 | ||
1716 | if (hwid & ~(HWID_MASK >> HWID_OFFSET)) | |
1717 | return -EINVAL; | |
1718 | } | |
1719 | } | |
1720 | ||
5a963eb6 WT |
1721 | return 0; |
1722 | } | |
c12b395a | 1723 | |
4974d5f6 LB |
1724 | static void ip6erspan_set_version(struct nlattr *data[], |
1725 | struct __ip6_tnl_parm *parms) | |
1726 | { | |
efcc9bca LB |
1727 | if (!data) |
1728 | return; | |
1729 | ||
4974d5f6 LB |
1730 | parms->erspan_ver = 1; |
1731 | if (data[IFLA_GRE_ERSPAN_VER]) | |
1732 | parms->erspan_ver = nla_get_u8(data[IFLA_GRE_ERSPAN_VER]); | |
1733 | ||
1734 | if (parms->erspan_ver == 1) { | |
1735 | if (data[IFLA_GRE_ERSPAN_INDEX]) | |
1736 | parms->index = nla_get_u32(data[IFLA_GRE_ERSPAN_INDEX]); | |
1737 | } else if (parms->erspan_ver == 2) { | |
1738 | if (data[IFLA_GRE_ERSPAN_DIR]) | |
1739 | parms->dir = nla_get_u8(data[IFLA_GRE_ERSPAN_DIR]); | |
1740 | if (data[IFLA_GRE_ERSPAN_HWID]) | |
1741 | parms->hwid = nla_get_u16(data[IFLA_GRE_ERSPAN_HWID]); | |
1742 | } | |
1743 | } | |
1744 | ||
c12b395a | 1745 | static void ip6gre_netlink_parms(struct nlattr *data[], |
1746 | struct __ip6_tnl_parm *parms) | |
1747 | { | |
1748 | memset(parms, 0, sizeof(*parms)); | |
1749 | ||
1750 | if (!data) | |
1751 | return; | |
1752 | ||
1753 | if (data[IFLA_GRE_LINK]) | |
1754 | parms->link = nla_get_u32(data[IFLA_GRE_LINK]); | |
1755 | ||
1756 | if (data[IFLA_GRE_IFLAGS]) | |
f41fe3c2 TH |
1757 | parms->i_flags = gre_flags_to_tnl_flags( |
1758 | nla_get_be16(data[IFLA_GRE_IFLAGS])); | |
c12b395a | 1759 | |
1760 | if (data[IFLA_GRE_OFLAGS]) | |
f41fe3c2 TH |
1761 | parms->o_flags = gre_flags_to_tnl_flags( |
1762 | nla_get_be16(data[IFLA_GRE_OFLAGS])); | |
c12b395a | 1763 | |
1764 | if (data[IFLA_GRE_IKEY]) | |
1765 | parms->i_key = nla_get_be32(data[IFLA_GRE_IKEY]); | |
1766 | ||
1767 | if (data[IFLA_GRE_OKEY]) | |
1768 | parms->o_key = nla_get_be32(data[IFLA_GRE_OKEY]); | |
1769 | ||
1770 | if (data[IFLA_GRE_LOCAL]) | |
67b61f6c | 1771 | parms->laddr = nla_get_in6_addr(data[IFLA_GRE_LOCAL]); |
c12b395a | 1772 | |
1773 | if (data[IFLA_GRE_REMOTE]) | |
67b61f6c | 1774 | parms->raddr = nla_get_in6_addr(data[IFLA_GRE_REMOTE]); |
c12b395a | 1775 | |
1776 | if (data[IFLA_GRE_TTL]) | |
1777 | parms->hop_limit = nla_get_u8(data[IFLA_GRE_TTL]); | |
1778 | ||
1779 | if (data[IFLA_GRE_ENCAP_LIMIT]) | |
1780 | parms->encap_limit = nla_get_u8(data[IFLA_GRE_ENCAP_LIMIT]); | |
1781 | ||
1782 | if (data[IFLA_GRE_FLOWINFO]) | |
c2675de4 | 1783 | parms->flowinfo = nla_get_be32(data[IFLA_GRE_FLOWINFO]); |
c12b395a | 1784 | |
1785 | if (data[IFLA_GRE_FLAGS]) | |
1786 | parms->flags = nla_get_u32(data[IFLA_GRE_FLAGS]); | |
0a473b82 CG |
1787 | |
1788 | if (data[IFLA_GRE_FWMARK]) | |
1789 | parms->fwmark = nla_get_u32(data[IFLA_GRE_FWMARK]); | |
5a963eb6 | 1790 | |
6712abc1 WT |
1791 | if (data[IFLA_GRE_COLLECT_METADATA]) |
1792 | parms->collect_md = true; | |
c12b395a | 1793 | } |
1794 | ||
1795 | static int ip6gre_tap_init(struct net_device *dev) | |
1796 | { | |
a3c119d3 | 1797 | int ret; |
c12b395a | 1798 | |
a3c119d3 MKL |
1799 | ret = ip6gre_tunnel_init_common(dev); |
1800 | if (ret) | |
1801 | return ret; | |
c12b395a | 1802 | |
0a46baaf SC |
1803 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
1804 | ||
c12b395a | 1805 | return 0; |
1806 | } | |
1807 | ||
1808 | static const struct net_device_ops ip6gre_tap_netdev_ops = { | |
1809 | .ndo_init = ip6gre_tap_init, | |
1810 | .ndo_uninit = ip6gre_tunnel_uninit, | |
1811 | .ndo_start_xmit = ip6gre_tunnel_xmit, | |
1812 | .ndo_set_mac_address = eth_mac_addr, | |
1813 | .ndo_validate_addr = eth_validate_addr, | |
b05229f4 | 1814 | .ndo_change_mtu = ip6_tnl_change_mtu, |
f61dd388 | 1815 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
ecf2c06a | 1816 | .ndo_get_iflink = ip6_tnl_get_iflink, |
c12b395a | 1817 | }; |
1818 | ||
2d665034 PM |
1819 | static int ip6erspan_calc_hlen(struct ip6_tnl *tunnel) |
1820 | { | |
1821 | int t_hlen; | |
1822 | ||
1823 | tunnel->tun_hlen = 8; | |
1824 | tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen + | |
1825 | erspan_hdr_len(tunnel->parms.erspan_ver); | |
1826 | ||
1827 | t_hlen = tunnel->hlen + sizeof(struct ipv6hdr); | |
eb95f52f | 1828 | tunnel->dev->needed_headroom = LL_MAX_HEADER + t_hlen; |
2d665034 PM |
1829 | return t_hlen; |
1830 | } | |
1831 | ||
5a963eb6 WT |
1832 | static int ip6erspan_tap_init(struct net_device *dev) |
1833 | { | |
1834 | struct ip6_tnl *tunnel; | |
1835 | int t_hlen; | |
1836 | int ret; | |
1837 | ||
1838 | tunnel = netdev_priv(dev); | |
1839 | ||
1840 | tunnel->dev = dev; | |
1841 | tunnel->net = dev_net(dev); | |
1842 | strcpy(tunnel->parms.name, dev->name); | |
1843 | ||
1844 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); | |
1845 | if (!dev->tstats) | |
1846 | return -ENOMEM; | |
1847 | ||
1848 | ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); | |
0c1dd2a1 EBE |
1849 | if (ret) |
1850 | goto cleanup_alloc_pcpu_stats; | |
1851 | ||
1852 | ret = gro_cells_init(&tunnel->gro_cells, dev); | |
1853 | if (ret) | |
1854 | goto cleanup_dst_cache_init; | |
5a963eb6 | 1855 | |
2d665034 | 1856 | t_hlen = ip6erspan_calc_hlen(tunnel); |
5a963eb6 WT |
1857 | dev->mtu = ETH_DATA_LEN - t_hlen; |
1858 | if (dev->type == ARPHRD_ETHER) | |
1859 | dev->mtu -= ETH_HLEN; | |
1860 | if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) | |
1861 | dev->mtu -= 8; | |
1862 | ||
1863 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2d665034 | 1864 | ip6erspan_tnl_link_config(tunnel, 1); |
5a963eb6 WT |
1865 | |
1866 | return 0; | |
0c1dd2a1 EBE |
1867 | |
1868 | cleanup_dst_cache_init: | |
1869 | dst_cache_destroy(&tunnel->dst_cache); | |
1870 | cleanup_alloc_pcpu_stats: | |
1871 | free_percpu(dev->tstats); | |
1872 | dev->tstats = NULL; | |
1873 | return ret; | |
5a963eb6 WT |
1874 | } |
1875 | ||
1876 | static const struct net_device_ops ip6erspan_netdev_ops = { | |
1877 | .ndo_init = ip6erspan_tap_init, | |
b80d0b93 | 1878 | .ndo_uninit = ip6erspan_tunnel_uninit, |
5a963eb6 WT |
1879 | .ndo_start_xmit = ip6erspan_tunnel_xmit, |
1880 | .ndo_set_mac_address = eth_mac_addr, | |
1881 | .ndo_validate_addr = eth_validate_addr, | |
1882 | .ndo_change_mtu = ip6_tnl_change_mtu, | |
1883 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
1884 | .ndo_get_iflink = ip6_tnl_get_iflink, | |
1885 | }; | |
1886 | ||
c12b395a | 1887 | static void ip6gre_tap_setup(struct net_device *dev) |
1888 | { | |
1889 | ||
1890 | ether_setup(dev); | |
1891 | ||
2c52129a | 1892 | dev->max_mtu = 0; |
c12b395a | 1893 | dev->netdev_ops = &ip6gre_tap_netdev_ops; |
cf124db5 DM |
1894 | dev->needs_free_netdev = true; |
1895 | dev->priv_destructor = ip6gre_dev_free; | |
c12b395a | 1896 | |
c12b395a | 1897 | dev->features |= NETIF_F_NETNS_LOCAL; |
d13b161c | 1898 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
0a46baaf | 1899 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
2d40557c | 1900 | netif_keep_dst(dev); |
c12b395a | 1901 | } |
1902 | ||
1faf3d9f TH |
1903 | static bool ip6gre_netlink_encap_parms(struct nlattr *data[], |
1904 | struct ip_tunnel_encap *ipencap) | |
1905 | { | |
1906 | bool ret = false; | |
1907 | ||
1908 | memset(ipencap, 0, sizeof(*ipencap)); | |
1909 | ||
1910 | if (!data) | |
1911 | return ret; | |
1912 | ||
1913 | if (data[IFLA_GRE_ENCAP_TYPE]) { | |
1914 | ret = true; | |
1915 | ipencap->type = nla_get_u16(data[IFLA_GRE_ENCAP_TYPE]); | |
1916 | } | |
1917 | ||
1918 | if (data[IFLA_GRE_ENCAP_FLAGS]) { | |
1919 | ret = true; | |
1920 | ipencap->flags = nla_get_u16(data[IFLA_GRE_ENCAP_FLAGS]); | |
1921 | } | |
1922 | ||
1923 | if (data[IFLA_GRE_ENCAP_SPORT]) { | |
1924 | ret = true; | |
1925 | ipencap->sport = nla_get_be16(data[IFLA_GRE_ENCAP_SPORT]); | |
1926 | } | |
1927 | ||
1928 | if (data[IFLA_GRE_ENCAP_DPORT]) { | |
1929 | ret = true; | |
1930 | ipencap->dport = nla_get_be16(data[IFLA_GRE_ENCAP_DPORT]); | |
1931 | } | |
1932 | ||
1933 | return ret; | |
1934 | } | |
1935 | ||
7fa38a7c PM |
1936 | static int ip6gre_newlink_common(struct net *src_net, struct net_device *dev, |
1937 | struct nlattr *tb[], struct nlattr *data[], | |
1938 | struct netlink_ext_ack *extack) | |
c12b395a | 1939 | { |
1940 | struct ip6_tnl *nt; | |
1faf3d9f | 1941 | struct ip_tunnel_encap ipencap; |
c12b395a | 1942 | int err; |
1943 | ||
1944 | nt = netdev_priv(dev); | |
1faf3d9f TH |
1945 | |
1946 | if (ip6gre_netlink_encap_parms(data, &ipencap)) { | |
1947 | int err = ip6_tnl_encap_setup(nt, &ipencap); | |
1948 | ||
1949 | if (err < 0) | |
1950 | return err; | |
1951 | } | |
1952 | ||
c12b395a | 1953 | if (dev->type == ARPHRD_ETHER && !tb[IFLA_ADDRESS]) |
1954 | eth_hw_addr_random(dev); | |
1955 | ||
1956 | nt->dev = dev; | |
0bd87628 | 1957 | nt->net = dev_net(dev); |
c12b395a | 1958 | |
c12b395a | 1959 | err = register_netdevice(dev); |
1960 | if (err) | |
1961 | goto out; | |
1962 | ||
128bb975 AK |
1963 | if (tb[IFLA_MTU]) |
1964 | ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1965 | ||
c12b395a | 1966 | dev_hold(dev); |
c12b395a | 1967 | |
1968 | out: | |
1969 | return err; | |
1970 | } | |
1971 | ||
7fa38a7c PM |
1972 | static int ip6gre_newlink(struct net *src_net, struct net_device *dev, |
1973 | struct nlattr *tb[], struct nlattr *data[], | |
1974 | struct netlink_ext_ack *extack) | |
1975 | { | |
7fa38a7c PM |
1976 | struct ip6_tnl *nt = netdev_priv(dev); |
1977 | struct net *net = dev_net(dev); | |
b80d0b93 WT |
1978 | struct ip6gre_net *ign; |
1979 | int err; | |
1980 | ||
1981 | ip6gre_netlink_parms(data, &nt->parms); | |
1982 | ign = net_generic(net, ip6gre_net_id); | |
1983 | ||
1984 | if (nt->parms.collect_md) { | |
1985 | if (rtnl_dereference(ign->collect_md_tun)) | |
1986 | return -EEXIST; | |
1987 | } else { | |
1988 | if (ip6gre_tunnel_find(net, &nt->parms, dev->type)) | |
1989 | return -EEXIST; | |
1990 | } | |
7fa38a7c | 1991 | |
b80d0b93 | 1992 | err = ip6gre_newlink_common(src_net, dev, tb, data, extack); |
7fa38a7c PM |
1993 | if (!err) { |
1994 | ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]); | |
b80d0b93 | 1995 | ip6gre_tunnel_link_md(ign, nt); |
7fa38a7c PM |
1996 | ip6gre_tunnel_link(net_generic(net, ip6gre_net_id), nt); |
1997 | } | |
1998 | return err; | |
1999 | } | |
2000 | ||
c8632fc3 PM |
2001 | static struct ip6_tnl * |
2002 | ip6gre_changelink_common(struct net_device *dev, struct nlattr *tb[], | |
2003 | struct nlattr *data[], struct __ip6_tnl_parm *p_p, | |
2004 | struct netlink_ext_ack *extack) | |
c12b395a | 2005 | { |
22f08069 ND |
2006 | struct ip6_tnl *t, *nt = netdev_priv(dev); |
2007 | struct net *net = nt->net; | |
c12b395a | 2008 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); |
1faf3d9f | 2009 | struct ip_tunnel_encap ipencap; |
c12b395a | 2010 | |
2011 | if (dev == ign->fb_tunnel_dev) | |
c8632fc3 | 2012 | return ERR_PTR(-EINVAL); |
c12b395a | 2013 | |
1faf3d9f TH |
2014 | if (ip6gre_netlink_encap_parms(data, &ipencap)) { |
2015 | int err = ip6_tnl_encap_setup(nt, &ipencap); | |
2016 | ||
2017 | if (err < 0) | |
c8632fc3 | 2018 | return ERR_PTR(err); |
1faf3d9f TH |
2019 | } |
2020 | ||
c8632fc3 | 2021 | ip6gre_netlink_parms(data, p_p); |
c12b395a | 2022 | |
c8632fc3 | 2023 | t = ip6gre_tunnel_locate(net, p_p, 0); |
c12b395a | 2024 | |
2025 | if (t) { | |
2026 | if (t->dev != dev) | |
c8632fc3 | 2027 | return ERR_PTR(-EEXIST); |
c12b395a | 2028 | } else { |
2029 | t = nt; | |
c12b395a | 2030 | } |
2031 | ||
c8632fc3 PM |
2032 | return t; |
2033 | } | |
2034 | ||
2035 | static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[], | |
2036 | struct nlattr *data[], | |
2037 | struct netlink_ext_ack *extack) | |
2038 | { | |
ab5098fa OM |
2039 | struct ip6_tnl *t = netdev_priv(dev); |
2040 | struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id); | |
c8632fc3 | 2041 | struct __ip6_tnl_parm p; |
c8632fc3 PM |
2042 | |
2043 | t = ip6gre_changelink_common(dev, tb, data, &p, extack); | |
2044 | if (IS_ERR(t)) | |
2045 | return PTR_ERR(t); | |
2046 | ||
b80d0b93 | 2047 | ip6gre_tunnel_unlink_md(ign, t); |
6a61d4db ND |
2048 | ip6gre_tunnel_unlink(ign, t); |
2049 | ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]); | |
b80d0b93 | 2050 | ip6gre_tunnel_link_md(ign, t); |
6a61d4db | 2051 | ip6gre_tunnel_link(ign, t); |
c12b395a | 2052 | return 0; |
2053 | } | |
2054 | ||
54d63f78 ND |
2055 | static void ip6gre_dellink(struct net_device *dev, struct list_head *head) |
2056 | { | |
2057 | struct net *net = dev_net(dev); | |
2058 | struct ip6gre_net *ign = net_generic(net, ip6gre_net_id); | |
2059 | ||
2060 | if (dev != ign->fb_tunnel_dev) | |
2061 | unregister_netdevice_queue(dev, head); | |
2062 | } | |
2063 | ||
c12b395a | 2064 | static size_t ip6gre_get_size(const struct net_device *dev) |
2065 | { | |
2066 | return | |
2067 | /* IFLA_GRE_LINK */ | |
2068 | nla_total_size(4) + | |
2069 | /* IFLA_GRE_IFLAGS */ | |
2070 | nla_total_size(2) + | |
2071 | /* IFLA_GRE_OFLAGS */ | |
2072 | nla_total_size(2) + | |
2073 | /* IFLA_GRE_IKEY */ | |
2074 | nla_total_size(4) + | |
2075 | /* IFLA_GRE_OKEY */ | |
2076 | nla_total_size(4) + | |
2077 | /* IFLA_GRE_LOCAL */ | |
a3754133 | 2078 | nla_total_size(sizeof(struct in6_addr)) + |
c12b395a | 2079 | /* IFLA_GRE_REMOTE */ |
a3754133 | 2080 | nla_total_size(sizeof(struct in6_addr)) + |
c12b395a | 2081 | /* IFLA_GRE_TTL */ |
2082 | nla_total_size(1) + | |
c12b395a | 2083 | /* IFLA_GRE_ENCAP_LIMIT */ |
2084 | nla_total_size(1) + | |
2085 | /* IFLA_GRE_FLOWINFO */ | |
2086 | nla_total_size(4) + | |
2087 | /* IFLA_GRE_FLAGS */ | |
2088 | nla_total_size(4) + | |
1faf3d9f TH |
2089 | /* IFLA_GRE_ENCAP_TYPE */ |
2090 | nla_total_size(2) + | |
2091 | /* IFLA_GRE_ENCAP_FLAGS */ | |
2092 | nla_total_size(2) + | |
2093 | /* IFLA_GRE_ENCAP_SPORT */ | |
2094 | nla_total_size(2) + | |
2095 | /* IFLA_GRE_ENCAP_DPORT */ | |
2096 | nla_total_size(2) + | |
6712abc1 WT |
2097 | /* IFLA_GRE_COLLECT_METADATA */ |
2098 | nla_total_size(0) + | |
0a473b82 CG |
2099 | /* IFLA_GRE_FWMARK */ |
2100 | nla_total_size(4) + | |
5a963eb6 WT |
2101 | /* IFLA_GRE_ERSPAN_INDEX */ |
2102 | nla_total_size(4) + | |
c12b395a | 2103 | 0; |
2104 | } | |
2105 | ||
2106 | static int ip6gre_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
2107 | { | |
2108 | struct ip6_tnl *t = netdev_priv(dev); | |
2109 | struct __ip6_tnl_parm *p = &t->parms; | |
c706863b LB |
2110 | __be16 o_flags = p->o_flags; |
2111 | ||
103d0244 LB |
2112 | if (p->erspan_ver == 1 || p->erspan_ver == 2) { |
2113 | if (!p->collect_md) | |
2114 | o_flags |= TUNNEL_KEY; | |
2115 | ||
2116 | if (nla_put_u8(skb, IFLA_GRE_ERSPAN_VER, p->erspan_ver)) | |
2117 | goto nla_put_failure; | |
2118 | ||
2119 | if (p->erspan_ver == 1) { | |
2120 | if (nla_put_u32(skb, IFLA_GRE_ERSPAN_INDEX, p->index)) | |
2121 | goto nla_put_failure; | |
2122 | } else { | |
2123 | if (nla_put_u8(skb, IFLA_GRE_ERSPAN_DIR, p->dir)) | |
2124 | goto nla_put_failure; | |
2125 | if (nla_put_u16(skb, IFLA_GRE_ERSPAN_HWID, p->hwid)) | |
2126 | goto nla_put_failure; | |
2127 | } | |
2128 | } | |
c12b395a | 2129 | |
2130 | if (nla_put_u32(skb, IFLA_GRE_LINK, p->link) || | |
f41fe3c2 TH |
2131 | nla_put_be16(skb, IFLA_GRE_IFLAGS, |
2132 | gre_tnl_flags_to_gre_flags(p->i_flags)) || | |
2133 | nla_put_be16(skb, IFLA_GRE_OFLAGS, | |
c706863b | 2134 | gre_tnl_flags_to_gre_flags(o_flags)) || |
c12b395a | 2135 | nla_put_be32(skb, IFLA_GRE_IKEY, p->i_key) || |
2136 | nla_put_be32(skb, IFLA_GRE_OKEY, p->o_key) || | |
930345ea JB |
2137 | nla_put_in6_addr(skb, IFLA_GRE_LOCAL, &p->laddr) || |
2138 | nla_put_in6_addr(skb, IFLA_GRE_REMOTE, &p->raddr) || | |
c12b395a | 2139 | nla_put_u8(skb, IFLA_GRE_TTL, p->hop_limit) || |
c12b395a | 2140 | nla_put_u8(skb, IFLA_GRE_ENCAP_LIMIT, p->encap_limit) || |
2141 | nla_put_be32(skb, IFLA_GRE_FLOWINFO, p->flowinfo) || | |
0a473b82 | 2142 | nla_put_u32(skb, IFLA_GRE_FLAGS, p->flags) || |
103d0244 | 2143 | nla_put_u32(skb, IFLA_GRE_FWMARK, p->fwmark)) |
c12b395a | 2144 | goto nla_put_failure; |
1faf3d9f TH |
2145 | |
2146 | if (nla_put_u16(skb, IFLA_GRE_ENCAP_TYPE, | |
2147 | t->encap.type) || | |
2148 | nla_put_be16(skb, IFLA_GRE_ENCAP_SPORT, | |
2149 | t->encap.sport) || | |
2150 | nla_put_be16(skb, IFLA_GRE_ENCAP_DPORT, | |
2151 | t->encap.dport) || | |
2152 | nla_put_u16(skb, IFLA_GRE_ENCAP_FLAGS, | |
2153 | t->encap.flags)) | |
2154 | goto nla_put_failure; | |
2155 | ||
6712abc1 WT |
2156 | if (p->collect_md) { |
2157 | if (nla_put_flag(skb, IFLA_GRE_COLLECT_METADATA)) | |
2158 | goto nla_put_failure; | |
2159 | } | |
2160 | ||
c12b395a | 2161 | return 0; |
2162 | ||
2163 | nla_put_failure: | |
2164 | return -EMSGSIZE; | |
2165 | } | |
2166 | ||
2167 | static const struct nla_policy ip6gre_policy[IFLA_GRE_MAX + 1] = { | |
2168 | [IFLA_GRE_LINK] = { .type = NLA_U32 }, | |
2169 | [IFLA_GRE_IFLAGS] = { .type = NLA_U16 }, | |
2170 | [IFLA_GRE_OFLAGS] = { .type = NLA_U16 }, | |
2171 | [IFLA_GRE_IKEY] = { .type = NLA_U32 }, | |
2172 | [IFLA_GRE_OKEY] = { .type = NLA_U32 }, | |
c593642c PB |
2173 | [IFLA_GRE_LOCAL] = { .len = sizeof_field(struct ipv6hdr, saddr) }, |
2174 | [IFLA_GRE_REMOTE] = { .len = sizeof_field(struct ipv6hdr, daddr) }, | |
c12b395a | 2175 | [IFLA_GRE_TTL] = { .type = NLA_U8 }, |
2176 | [IFLA_GRE_ENCAP_LIMIT] = { .type = NLA_U8 }, | |
2177 | [IFLA_GRE_FLOWINFO] = { .type = NLA_U32 }, | |
2178 | [IFLA_GRE_FLAGS] = { .type = NLA_U32 }, | |
1faf3d9f TH |
2179 | [IFLA_GRE_ENCAP_TYPE] = { .type = NLA_U16 }, |
2180 | [IFLA_GRE_ENCAP_FLAGS] = { .type = NLA_U16 }, | |
2181 | [IFLA_GRE_ENCAP_SPORT] = { .type = NLA_U16 }, | |
2182 | [IFLA_GRE_ENCAP_DPORT] = { .type = NLA_U16 }, | |
6712abc1 | 2183 | [IFLA_GRE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
0a473b82 | 2184 | [IFLA_GRE_FWMARK] = { .type = NLA_U32 }, |
5a963eb6 | 2185 | [IFLA_GRE_ERSPAN_INDEX] = { .type = NLA_U32 }, |
94d7d8f2 WT |
2186 | [IFLA_GRE_ERSPAN_VER] = { .type = NLA_U8 }, |
2187 | [IFLA_GRE_ERSPAN_DIR] = { .type = NLA_U8 }, | |
2188 | [IFLA_GRE_ERSPAN_HWID] = { .type = NLA_U16 }, | |
c12b395a | 2189 | }; |
2190 | ||
5a963eb6 WT |
2191 | static void ip6erspan_tap_setup(struct net_device *dev) |
2192 | { | |
2193 | ether_setup(dev); | |
2194 | ||
4123f637 | 2195 | dev->max_mtu = 0; |
5a963eb6 WT |
2196 | dev->netdev_ops = &ip6erspan_netdev_ops; |
2197 | dev->needs_free_netdev = true; | |
2198 | dev->priv_destructor = ip6gre_dev_free; | |
2199 | ||
2200 | dev->features |= NETIF_F_NETNS_LOCAL; | |
2201 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; | |
2202 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
2203 | netif_keep_dst(dev); | |
2204 | } | |
2205 | ||
2d665034 PM |
2206 | static int ip6erspan_newlink(struct net *src_net, struct net_device *dev, |
2207 | struct nlattr *tb[], struct nlattr *data[], | |
2208 | struct netlink_ext_ack *extack) | |
2209 | { | |
2d665034 PM |
2210 | struct ip6_tnl *nt = netdev_priv(dev); |
2211 | struct net *net = dev_net(dev); | |
b80d0b93 WT |
2212 | struct ip6gre_net *ign; |
2213 | int err; | |
2214 | ||
2215 | ip6gre_netlink_parms(data, &nt->parms); | |
4974d5f6 | 2216 | ip6erspan_set_version(data, &nt->parms); |
b80d0b93 WT |
2217 | ign = net_generic(net, ip6gre_net_id); |
2218 | ||
2219 | if (nt->parms.collect_md) { | |
2220 | if (rtnl_dereference(ign->collect_md_tun_erspan)) | |
2221 | return -EEXIST; | |
2222 | } else { | |
2223 | if (ip6gre_tunnel_find(net, &nt->parms, dev->type)) | |
2224 | return -EEXIST; | |
2225 | } | |
2d665034 | 2226 | |
b80d0b93 | 2227 | err = ip6gre_newlink_common(src_net, dev, tb, data, extack); |
2d665034 PM |
2228 | if (!err) { |
2229 | ip6erspan_tnl_link_config(nt, !tb[IFLA_MTU]); | |
b80d0b93 | 2230 | ip6erspan_tunnel_link_md(ign, nt); |
2d665034 PM |
2231 | ip6gre_tunnel_link(net_generic(net, ip6gre_net_id), nt); |
2232 | } | |
2233 | return err; | |
2234 | } | |
2235 | ||
2236 | static void ip6erspan_tnl_link_config(struct ip6_tnl *t, int set_mtu) | |
2237 | { | |
2238 | ip6gre_tnl_link_config_common(t); | |
2239 | ip6gre_tnl_link_config_route(t, set_mtu, ip6erspan_calc_hlen(t)); | |
2240 | } | |
2241 | ||
2242 | static int ip6erspan_tnl_change(struct ip6_tnl *t, | |
2243 | const struct __ip6_tnl_parm *p, int set_mtu) | |
2244 | { | |
2245 | ip6gre_tnl_copy_tnl_parm(t, p); | |
2246 | ip6erspan_tnl_link_config(t, set_mtu); | |
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | static int ip6erspan_changelink(struct net_device *dev, struct nlattr *tb[], | |
2251 | struct nlattr *data[], | |
2252 | struct netlink_ext_ack *extack) | |
2253 | { | |
2254 | struct ip6gre_net *ign = net_generic(dev_net(dev), ip6gre_net_id); | |
2255 | struct __ip6_tnl_parm p; | |
2256 | struct ip6_tnl *t; | |
2257 | ||
2258 | t = ip6gre_changelink_common(dev, tb, data, &p, extack); | |
2259 | if (IS_ERR(t)) | |
2260 | return PTR_ERR(t); | |
2261 | ||
4974d5f6 | 2262 | ip6erspan_set_version(data, &p); |
b80d0b93 | 2263 | ip6gre_tunnel_unlink_md(ign, t); |
2d665034 PM |
2264 | ip6gre_tunnel_unlink(ign, t); |
2265 | ip6erspan_tnl_change(t, &p, !tb[IFLA_MTU]); | |
b80d0b93 | 2266 | ip6erspan_tunnel_link_md(ign, t); |
2d665034 PM |
2267 | ip6gre_tunnel_link(ign, t); |
2268 | return 0; | |
2269 | } | |
2270 | ||
c12b395a | 2271 | static struct rtnl_link_ops ip6gre_link_ops __read_mostly = { |
2272 | .kind = "ip6gre", | |
2273 | .maxtype = IFLA_GRE_MAX, | |
2274 | .policy = ip6gre_policy, | |
2275 | .priv_size = sizeof(struct ip6_tnl), | |
2276 | .setup = ip6gre_tunnel_setup, | |
2277 | .validate = ip6gre_tunnel_validate, | |
2278 | .newlink = ip6gre_newlink, | |
2279 | .changelink = ip6gre_changelink, | |
54d63f78 | 2280 | .dellink = ip6gre_dellink, |
c12b395a | 2281 | .get_size = ip6gre_get_size, |
2282 | .fill_info = ip6gre_fill_info, | |
1728d4fa | 2283 | .get_link_net = ip6_tnl_get_link_net, |
c12b395a | 2284 | }; |
2285 | ||
2286 | static struct rtnl_link_ops ip6gre_tap_ops __read_mostly = { | |
2287 | .kind = "ip6gretap", | |
2288 | .maxtype = IFLA_GRE_MAX, | |
2289 | .policy = ip6gre_policy, | |
2290 | .priv_size = sizeof(struct ip6_tnl), | |
2291 | .setup = ip6gre_tap_setup, | |
2292 | .validate = ip6gre_tap_validate, | |
2293 | .newlink = ip6gre_newlink, | |
2294 | .changelink = ip6gre_changelink, | |
2295 | .get_size = ip6gre_get_size, | |
2296 | .fill_info = ip6gre_fill_info, | |
3390e397 | 2297 | .get_link_net = ip6_tnl_get_link_net, |
c12b395a | 2298 | }; |
2299 | ||
5a963eb6 WT |
2300 | static struct rtnl_link_ops ip6erspan_tap_ops __read_mostly = { |
2301 | .kind = "ip6erspan", | |
2302 | .maxtype = IFLA_GRE_MAX, | |
2303 | .policy = ip6gre_policy, | |
2304 | .priv_size = sizeof(struct ip6_tnl), | |
2305 | .setup = ip6erspan_tap_setup, | |
2306 | .validate = ip6erspan_tap_validate, | |
2d665034 PM |
2307 | .newlink = ip6erspan_newlink, |
2308 | .changelink = ip6erspan_changelink, | |
5a963eb6 WT |
2309 | .get_size = ip6gre_get_size, |
2310 | .fill_info = ip6gre_fill_info, | |
2311 | .get_link_net = ip6_tnl_get_link_net, | |
2312 | }; | |
2313 | ||
c12b395a | 2314 | /* |
2315 | * And now the modules code and kernel interface. | |
2316 | */ | |
2317 | ||
2318 | static int __init ip6gre_init(void) | |
2319 | { | |
2320 | int err; | |
2321 | ||
2322 | pr_info("GRE over IPv6 tunneling driver\n"); | |
2323 | ||
2324 | err = register_pernet_device(&ip6gre_net_ops); | |
2325 | if (err < 0) | |
2326 | return err; | |
2327 | ||
2328 | err = inet6_add_protocol(&ip6gre_protocol, IPPROTO_GRE); | |
2329 | if (err < 0) { | |
2330 | pr_info("%s: can't add protocol\n", __func__); | |
2331 | goto add_proto_failed; | |
2332 | } | |
2333 | ||
2334 | err = rtnl_link_register(&ip6gre_link_ops); | |
2335 | if (err < 0) | |
2336 | goto rtnl_link_failed; | |
2337 | ||
2338 | err = rtnl_link_register(&ip6gre_tap_ops); | |
2339 | if (err < 0) | |
2340 | goto tap_ops_failed; | |
2341 | ||
5a963eb6 WT |
2342 | err = rtnl_link_register(&ip6erspan_tap_ops); |
2343 | if (err < 0) | |
2344 | goto erspan_link_failed; | |
2345 | ||
c12b395a | 2346 | out: |
2347 | return err; | |
2348 | ||
5a963eb6 WT |
2349 | erspan_link_failed: |
2350 | rtnl_link_unregister(&ip6gre_tap_ops); | |
c12b395a | 2351 | tap_ops_failed: |
2352 | rtnl_link_unregister(&ip6gre_link_ops); | |
2353 | rtnl_link_failed: | |
2354 | inet6_del_protocol(&ip6gre_protocol, IPPROTO_GRE); | |
2355 | add_proto_failed: | |
2356 | unregister_pernet_device(&ip6gre_net_ops); | |
2357 | goto out; | |
2358 | } | |
2359 | ||
2360 | static void __exit ip6gre_fini(void) | |
2361 | { | |
2362 | rtnl_link_unregister(&ip6gre_tap_ops); | |
2363 | rtnl_link_unregister(&ip6gre_link_ops); | |
5a963eb6 | 2364 | rtnl_link_unregister(&ip6erspan_tap_ops); |
c12b395a | 2365 | inet6_del_protocol(&ip6gre_protocol, IPPROTO_GRE); |
2366 | unregister_pernet_device(&ip6gre_net_ops); | |
2367 | } | |
2368 | ||
2369 | module_init(ip6gre_init); | |
2370 | module_exit(ip6gre_fini); | |
2371 | MODULE_LICENSE("GPL"); | |
2372 | MODULE_AUTHOR("D. Kozlov (xeb@mail.ru)"); | |
2373 | MODULE_DESCRIPTION("GRE over IPv6 tunneling device"); | |
2374 | MODULE_ALIAS_RTNL_LINK("ip6gre"); | |
5a4ee9a9 | 2375 | MODULE_ALIAS_RTNL_LINK("ip6gretap"); |
94d7d8f2 | 2376 | MODULE_ALIAS_RTNL_LINK("ip6erspan"); |
c12b395a | 2377 | MODULE_ALIAS_NETDEV("ip6gre0"); |