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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * IPv6 over IPv4 tunnel device - Simple Internet Transition (SIT) | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
8 | * | |
1da177e4 LT |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | * Changes: | |
15 | * Roger Venning <r.venning@telstra.com>: 6to4 support | |
16 | * Nate Thompson <nate@thebog.net>: 6to4 support | |
fadf6bf0 | 17 | * Fred Templin <fred.l.templin@boeing.com>: isatap support |
1da177e4 LT |
18 | */ |
19 | ||
f3213831 JP |
20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
21 | ||
1da177e4 | 22 | #include <linux/module.h> |
4fc268d2 | 23 | #include <linux/capability.h> |
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/icmp.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
7c0f6ba6 | 34 | #include <linux/uaccess.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/netfilter_ipv4.h> | |
46f25dff | 37 | #include <linux/if_ether.h> |
1da177e4 LT |
38 | |
39 | #include <net/sock.h> | |
40 | #include <net/snmp.h> | |
41 | ||
42 | #include <net/ipv6.h> | |
43 | #include <net/protocol.h> | |
44 | #include <net/transp_v6.h> | |
45 | #include <net/ip6_fib.h> | |
46 | #include <net/ip6_route.h> | |
47 | #include <net/ndisc.h> | |
48 | #include <net/addrconf.h> | |
49 | #include <net/ip.h> | |
50 | #include <net/udp.h> | |
51 | #include <net/icmp.h> | |
c5441932 | 52 | #include <net/ip_tunnels.h> |
1da177e4 LT |
53 | #include <net/inet_ecn.h> |
54 | #include <net/xfrm.h> | |
55 | #include <net/dsfield.h> | |
8190d900 PE |
56 | #include <net/net_namespace.h> |
57 | #include <net/netns/generic.h> | |
1da177e4 LT |
58 | |
59 | /* | |
60 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c | |
61 | ||
62 | For comments look at net/ipv4/ip_gre.c --ANK | |
63 | */ | |
64 | ||
e87a8f24 | 65 | #define IP6_SIT_HASH_SIZE 16 |
e69a4adc | 66 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
1da177e4 | 67 | |
f4e0b4c5 ND |
68 | static bool log_ecn_error = true; |
69 | module_param(log_ecn_error, bool, 0644); | |
70 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
71 | ||
15fc1f70 | 72 | static int ipip6_tunnel_init(struct net_device *dev); |
1da177e4 | 73 | static void ipip6_tunnel_setup(struct net_device *dev); |
15fc1f70 | 74 | static void ipip6_dev_free(struct net_device *dev); |
218774dc HFS |
75 | static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst, |
76 | __be32 *v4dst); | |
ba3e3f50 | 77 | static struct rtnl_link_ops sit_link_ops __read_mostly; |
1da177e4 | 78 | |
c7d03a00 | 79 | static unsigned int sit_net_id __read_mostly; |
8190d900 | 80 | struct sit_net { |
e87a8f24 JK |
81 | struct ip_tunnel __rcu *tunnels_r_l[IP6_SIT_HASH_SIZE]; |
82 | struct ip_tunnel __rcu *tunnels_r[IP6_SIT_HASH_SIZE]; | |
83 | struct ip_tunnel __rcu *tunnels_l[IP6_SIT_HASH_SIZE]; | |
3a43be3c ED |
84 | struct ip_tunnel __rcu *tunnels_wc[1]; |
85 | struct ip_tunnel __rcu **tunnels[4]; | |
29182176 | 86 | |
cd3dbc19 | 87 | struct net_device *fb_tunnel_dev; |
8190d900 PE |
88 | }; |
89 | ||
4543c10d ED |
90 | /* |
91 | * Must be invoked with rcu_read_lock | |
92 | */ | |
3e866703 | 93 | static struct ip_tunnel *ipip6_tunnel_lookup(struct net *net, |
3051fbec DA |
94 | struct net_device *dev, |
95 | __be32 remote, __be32 local, | |
96 | int sifindex) | |
1da177e4 | 97 | { |
3a43be3c ED |
98 | unsigned int h0 = HASH(remote); |
99 | unsigned int h1 = HASH(local); | |
1da177e4 | 100 | struct ip_tunnel *t; |
29182176 | 101 | struct sit_net *sitn = net_generic(net, sit_net_id); |
3051fbec | 102 | int ifindex = dev ? dev->ifindex : 0; |
1da177e4 | 103 | |
e086cadc | 104 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r_l[h0 ^ h1]) { |
1da177e4 | 105 | if (local == t->parms.iph.saddr && |
4fddbf5d | 106 | remote == t->parms.iph.daddr && |
3051fbec DA |
107 | (!dev || !t->parms.link || ifindex == t->parms.link || |
108 | sifindex == t->parms.link) && | |
4fddbf5d | 109 | (t->dev->flags & IFF_UP)) |
1da177e4 LT |
110 | return t; |
111 | } | |
e086cadc | 112 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r[h0]) { |
4fddbf5d | 113 | if (remote == t->parms.iph.daddr && |
3051fbec DA |
114 | (!dev || !t->parms.link || ifindex == t->parms.link || |
115 | sifindex == t->parms.link) && | |
4fddbf5d | 116 | (t->dev->flags & IFF_UP)) |
1da177e4 LT |
117 | return t; |
118 | } | |
e086cadc | 119 | for_each_ip_tunnel_rcu(t, sitn->tunnels_l[h1]) { |
4fddbf5d | 120 | if (local == t->parms.iph.saddr && |
3051fbec DA |
121 | (!dev || !t->parms.link || ifindex == t->parms.link || |
122 | sifindex == t->parms.link) && | |
4fddbf5d | 123 | (t->dev->flags & IFF_UP)) |
1da177e4 LT |
124 | return t; |
125 | } | |
4543c10d | 126 | t = rcu_dereference(sitn->tunnels_wc[0]); |
53b24b8f | 127 | if (t && (t->dev->flags & IFF_UP)) |
1da177e4 LT |
128 | return t; |
129 | return NULL; | |
130 | } | |
131 | ||
3a43be3c | 132 | static struct ip_tunnel __rcu **__ipip6_bucket(struct sit_net *sitn, |
ca8def14 | 133 | struct ip_tunnel_parm *parms) |
1da177e4 | 134 | { |
420fe234 YH |
135 | __be32 remote = parms->iph.daddr; |
136 | __be32 local = parms->iph.saddr; | |
3a43be3c | 137 | unsigned int h = 0; |
1da177e4 LT |
138 | int prio = 0; |
139 | ||
140 | if (remote) { | |
141 | prio |= 2; | |
142 | h ^= HASH(remote); | |
143 | } | |
144 | if (local) { | |
145 | prio |= 1; | |
146 | h ^= HASH(local); | |
147 | } | |
29182176 | 148 | return &sitn->tunnels[prio][h]; |
1da177e4 LT |
149 | } |
150 | ||
3a43be3c | 151 | static inline struct ip_tunnel __rcu **ipip6_bucket(struct sit_net *sitn, |
ca8def14 | 152 | struct ip_tunnel *t) |
420fe234 | 153 | { |
ca8def14 | 154 | return __ipip6_bucket(sitn, &t->parms); |
420fe234 YH |
155 | } |
156 | ||
ca8def14 | 157 | static void ipip6_tunnel_unlink(struct sit_net *sitn, struct ip_tunnel *t) |
1da177e4 | 158 | { |
3a43be3c ED |
159 | struct ip_tunnel __rcu **tp; |
160 | struct ip_tunnel *iter; | |
161 | ||
162 | for (tp = ipip6_bucket(sitn, t); | |
163 | (iter = rtnl_dereference(*tp)) != NULL; | |
164 | tp = &iter->next) { | |
165 | if (t == iter) { | |
cf778b00 | 166 | rcu_assign_pointer(*tp, t->next); |
1da177e4 LT |
167 | break; |
168 | } | |
169 | } | |
170 | } | |
171 | ||
ca8def14 | 172 | static void ipip6_tunnel_link(struct sit_net *sitn, struct ip_tunnel *t) |
1da177e4 | 173 | { |
3a43be3c | 174 | struct ip_tunnel __rcu **tp = ipip6_bucket(sitn, t); |
1da177e4 | 175 | |
cf778b00 ED |
176 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); |
177 | rcu_assign_pointer(*tp, t); | |
1da177e4 LT |
178 | } |
179 | ||
e0c93948 | 180 | static void ipip6_tunnel_clone_6rd(struct net_device *dev, struct sit_net *sitn) |
fa857afc YH |
181 | { |
182 | #ifdef CONFIG_IPV6_SIT_6RD | |
e0c93948 YH |
183 | struct ip_tunnel *t = netdev_priv(dev); |
184 | ||
ab1193d7 | 185 | if (dev == sitn->fb_tunnel_dev) { |
fa857afc YH |
186 | ipv6_addr_set(&t->ip6rd.prefix, htonl(0x20020000), 0, 0, 0); |
187 | t->ip6rd.relay_prefix = 0; | |
188 | t->ip6rd.prefixlen = 16; | |
189 | t->ip6rd.relay_prefixlen = 0; | |
190 | } else { | |
191 | struct ip_tunnel *t0 = netdev_priv(sitn->fb_tunnel_dev); | |
192 | memcpy(&t->ip6rd, &t0->ip6rd, sizeof(t->ip6rd)); | |
193 | } | |
194 | #endif | |
195 | } | |
196 | ||
f3723416 ND |
197 | static int ipip6_tunnel_create(struct net_device *dev) |
198 | { | |
199 | struct ip_tunnel *t = netdev_priv(dev); | |
200 | struct net *net = dev_net(dev); | |
201 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
202 | int err; | |
203 | ||
ebe084aa SK |
204 | memcpy(dev->dev_addr, &t->parms.iph.saddr, 4); |
205 | memcpy(dev->broadcast, &t->parms.iph.daddr, 4); | |
f3723416 | 206 | |
d440b720 | 207 | if ((__force u16)t->parms.i_flags & SIT_ISATAP) |
f3723416 ND |
208 | dev->priv_flags |= IFF_ISATAP; |
209 | ||
87e57399 TLSC |
210 | dev->rtnl_link_ops = &sit_link_ops; |
211 | ||
f3723416 ND |
212 | err = register_netdevice(dev); |
213 | if (err < 0) | |
214 | goto out; | |
215 | ||
ebe084aa SK |
216 | ipip6_tunnel_clone_6rd(dev, sitn); |
217 | ||
f3723416 ND |
218 | dev_hold(dev); |
219 | ||
220 | ipip6_tunnel_link(sitn, t); | |
221 | return 0; | |
222 | ||
223 | out: | |
224 | return err; | |
225 | } | |
226 | ||
3a43be3c | 227 | static struct ip_tunnel *ipip6_tunnel_locate(struct net *net, |
ca8def14 | 228 | struct ip_tunnel_parm *parms, int create) |
1da177e4 | 229 | { |
e69a4adc AV |
230 | __be32 remote = parms->iph.daddr; |
231 | __be32 local = parms->iph.saddr; | |
3a43be3c ED |
232 | struct ip_tunnel *t, *nt; |
233 | struct ip_tunnel __rcu **tp; | |
1da177e4 | 234 | struct net_device *dev; |
1da177e4 | 235 | char name[IFNAMSIZ]; |
ca8def14 | 236 | struct sit_net *sitn = net_generic(net, sit_net_id); |
1da177e4 | 237 | |
3a43be3c ED |
238 | for (tp = __ipip6_bucket(sitn, parms); |
239 | (t = rtnl_dereference(*tp)) != NULL; | |
240 | tp = &t->next) { | |
8db99e57 | 241 | if (local == t->parms.iph.saddr && |
4fddbf5d SH |
242 | remote == t->parms.iph.daddr && |
243 | parms->link == t->parms.link) { | |
8db99e57 SH |
244 | if (create) |
245 | return NULL; | |
246 | else | |
247 | return t; | |
248 | } | |
1da177e4 LT |
249 | } |
250 | if (!create) | |
251 | goto failed; | |
252 | ||
76489fe1 ED |
253 | if (parms->name[0]) { |
254 | if (!dev_valid_name(parms->name)) | |
255 | goto failed; | |
1da177e4 | 256 | strlcpy(name, parms->name, IFNAMSIZ); |
76489fe1 | 257 | } else { |
15fc1f70 | 258 | strcpy(name, "sit%d"); |
76489fe1 | 259 | } |
c835a677 TG |
260 | dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, |
261 | ipip6_tunnel_setup); | |
63159f29 | 262 | if (!dev) |
1da177e4 LT |
263 | return NULL; |
264 | ||
7a97146c PE |
265 | dev_net_set(dev, net); |
266 | ||
2941a486 | 267 | nt = netdev_priv(dev); |
1326c3d5 | 268 | |
1da177e4 | 269 | nt->parms = *parms; |
f3723416 | 270 | if (ipip6_tunnel_create(dev) < 0) |
b37d428b | 271 | goto failed_free; |
1da177e4 | 272 | |
1da177e4 LT |
273 | return nt; |
274 | ||
b37d428b | 275 | failed_free: |
cf124db5 | 276 | free_netdev(dev); |
1da177e4 LT |
277 | failed: |
278 | return NULL; | |
279 | } | |
280 | ||
ef9a9d11 ED |
281 | #define for_each_prl_rcu(start) \ |
282 | for (prl = rcu_dereference(start); \ | |
283 | prl; \ | |
284 | prl = rcu_dereference(prl->next)) | |
285 | ||
fadf6bf0 | 286 | static struct ip_tunnel_prl_entry * |
3fcfa129 | 287 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
fadf6bf0 | 288 | { |
ef9a9d11 | 289 | struct ip_tunnel_prl_entry *prl; |
fadf6bf0 | 290 | |
ef9a9d11 ED |
291 | for_each_prl_rcu(t->prl) |
292 | if (prl->addr == addr) | |
fadf6bf0 | 293 | break; |
ef9a9d11 | 294 | return prl; |
fadf6bf0 TF |
295 | |
296 | } | |
297 | ||
2b4743bd YH |
298 | static int ipip6_tunnel_get_prl(struct ip_tunnel *t, |
299 | struct ip_tunnel_prl __user *a) | |
300aaeea | 300 | { |
2b4743bd | 301 | struct ip_tunnel_prl kprl, *kp; |
300aaeea YH |
302 | struct ip_tunnel_prl_entry *prl; |
303 | unsigned int cmax, c = 0, ca, len; | |
304 | int ret = 0; | |
305 | ||
2b4743bd YH |
306 | if (copy_from_user(&kprl, a, sizeof(kprl))) |
307 | return -EFAULT; | |
308 | cmax = kprl.datalen / sizeof(kprl); | |
309 | if (cmax > 1 && kprl.addr != htonl(INADDR_ANY)) | |
300aaeea YH |
310 | cmax = 1; |
311 | ||
312 | /* For simple GET or for root users, | |
313 | * we try harder to allocate. | |
314 | */ | |
315 | kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ? | |
0ccc22f4 | 316 | kcalloc(cmax, sizeof(*kp), GFP_KERNEL | __GFP_NOWARN) : |
300aaeea YH |
317 | NULL; |
318 | ||
ef9a9d11 | 319 | rcu_read_lock(); |
300aaeea YH |
320 | |
321 | ca = t->prl_count < cmax ? t->prl_count : cmax; | |
322 | ||
323 | if (!kp) { | |
324 | /* We don't try hard to allocate much memory for | |
325 | * non-root users. | |
326 | * For root users, retry allocating enough memory for | |
327 | * the answer. | |
328 | */ | |
329 | kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC); | |
330 | if (!kp) { | |
331 | ret = -ENOMEM; | |
332 | goto out; | |
333 | } | |
334 | } | |
335 | ||
336 | c = 0; | |
ef9a9d11 | 337 | for_each_prl_rcu(t->prl) { |
298bf12d | 338 | if (c >= cmax) |
300aaeea | 339 | break; |
2b4743bd | 340 | if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr) |
300aaeea YH |
341 | continue; |
342 | kp[c].addr = prl->addr; | |
343 | kp[c].flags = prl->flags; | |
344 | c++; | |
2b4743bd | 345 | if (kprl.addr != htonl(INADDR_ANY)) |
300aaeea YH |
346 | break; |
347 | } | |
348 | out: | |
ef9a9d11 | 349 | rcu_read_unlock(); |
300aaeea YH |
350 | |
351 | len = sizeof(*kp) * c; | |
2b4743bd YH |
352 | ret = 0; |
353 | if ((len && copy_to_user(a + 1, kp, len)) || put_user(len, &a->datalen)) | |
354 | ret = -EFAULT; | |
300aaeea YH |
355 | |
356 | kfree(kp); | |
300aaeea | 357 | |
2b4743bd | 358 | return ret; |
300aaeea YH |
359 | } |
360 | ||
fadf6bf0 TF |
361 | static int |
362 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) | |
363 | { | |
364 | struct ip_tunnel_prl_entry *p; | |
3fcfa129 YH |
365 | int err = 0; |
366 | ||
0009ae1f YH |
367 | if (a->addr == htonl(INADDR_ANY)) |
368 | return -EINVAL; | |
369 | ||
aac4dddc | 370 | ASSERT_RTNL(); |
fadf6bf0 | 371 | |
3a43be3c | 372 | for (p = rtnl_dereference(t->prl); p; p = rtnl_dereference(p->next)) { |
300aaeea | 373 | if (p->addr == a->addr) { |
ef9a9d11 ED |
374 | if (chg) { |
375 | p->flags = a->flags; | |
376 | goto out; | |
377 | } | |
3fcfa129 YH |
378 | err = -EEXIST; |
379 | goto out; | |
fadf6bf0 TF |
380 | } |
381 | } | |
382 | ||
3fcfa129 YH |
383 | if (chg) { |
384 | err = -ENXIO; | |
385 | goto out; | |
386 | } | |
fadf6bf0 TF |
387 | |
388 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); | |
3fcfa129 YH |
389 | if (!p) { |
390 | err = -ENOBUFS; | |
391 | goto out; | |
392 | } | |
fadf6bf0 | 393 | |
fadf6bf0 | 394 | p->next = t->prl; |
300aaeea YH |
395 | p->addr = a->addr; |
396 | p->flags = a->flags; | |
ef9a9d11 | 397 | t->prl_count++; |
cf778b00 | 398 | rcu_assign_pointer(t->prl, p); |
3fcfa129 | 399 | out: |
3fcfa129 | 400 | return err; |
fadf6bf0 TF |
401 | } |
402 | ||
ef9a9d11 ED |
403 | static void prl_list_destroy_rcu(struct rcu_head *head) |
404 | { | |
405 | struct ip_tunnel_prl_entry *p, *n; | |
406 | ||
407 | p = container_of(head, struct ip_tunnel_prl_entry, rcu_head); | |
408 | do { | |
753ea8e9 | 409 | n = rcu_dereference_protected(p->next, 1); |
ef9a9d11 ED |
410 | kfree(p); |
411 | p = n; | |
412 | } while (p); | |
413 | } | |
414 | ||
fadf6bf0 TF |
415 | static int |
416 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) | |
417 | { | |
753ea8e9 ED |
418 | struct ip_tunnel_prl_entry *x; |
419 | struct ip_tunnel_prl_entry __rcu **p; | |
3fcfa129 YH |
420 | int err = 0; |
421 | ||
aac4dddc | 422 | ASSERT_RTNL(); |
fadf6bf0 | 423 | |
0009ae1f | 424 | if (a && a->addr != htonl(INADDR_ANY)) { |
753ea8e9 ED |
425 | for (p = &t->prl; |
426 | (x = rtnl_dereference(*p)) != NULL; | |
427 | p = &x->next) { | |
428 | if (x->addr == a->addr) { | |
fadf6bf0 | 429 | *p = x->next; |
11c476f3 | 430 | kfree_rcu(x, rcu_head); |
300aaeea | 431 | t->prl_count--; |
3fcfa129 | 432 | goto out; |
fadf6bf0 TF |
433 | } |
434 | } | |
3fcfa129 | 435 | err = -ENXIO; |
fadf6bf0 | 436 | } else { |
753ea8e9 ED |
437 | x = rtnl_dereference(t->prl); |
438 | if (x) { | |
ef9a9d11 | 439 | t->prl_count = 0; |
ef9a9d11 ED |
440 | call_rcu(&x->rcu_head, prl_list_destroy_rcu); |
441 | t->prl = NULL; | |
fadf6bf0 TF |
442 | } |
443 | } | |
3fcfa129 | 444 | out: |
4b279601 | 445 | return err; |
fadf6bf0 TF |
446 | } |
447 | ||
fadf6bf0 | 448 | static int |
b71d1d42 | 449 | isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t) |
fadf6bf0 | 450 | { |
3fcfa129 | 451 | struct ip_tunnel_prl_entry *p; |
fadf6bf0 TF |
452 | int ok = 1; |
453 | ||
ef9a9d11 | 454 | rcu_read_lock(); |
3fcfa129 | 455 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); |
fadf6bf0 | 456 | if (p) { |
300aaeea | 457 | if (p->flags & PRL_DEFAULT) |
fadf6bf0 TF |
458 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; |
459 | else | |
460 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; | |
461 | } else { | |
b71d1d42 ED |
462 | const struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; |
463 | ||
fadf6bf0 TF |
464 | if (ipv6_addr_is_isatap(addr6) && |
465 | (addr6->s6_addr32[3] == iph->saddr) && | |
52eeeb84 | 466 | ipv6_chk_prefix(addr6, t->dev)) |
fadf6bf0 TF |
467 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; |
468 | else | |
469 | ok = 0; | |
470 | } | |
ef9a9d11 | 471 | rcu_read_unlock(); |
fadf6bf0 TF |
472 | return ok; |
473 | } | |
474 | ||
1da177e4 LT |
475 | static void ipip6_tunnel_uninit(struct net_device *dev) |
476 | { | |
5e6700b3 ND |
477 | struct ip_tunnel *tunnel = netdev_priv(dev); |
478 | struct sit_net *sitn = net_generic(tunnel->net, sit_net_id); | |
ca8def14 | 479 | |
cd3dbc19 | 480 | if (dev == sitn->fb_tunnel_dev) { |
a9b3cd7f | 481 | RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL); |
1da177e4 | 482 | } else { |
5e6700b3 ND |
483 | ipip6_tunnel_unlink(sitn, tunnel); |
484 | ipip6_tunnel_del_prl(tunnel, NULL); | |
1da177e4 | 485 | } |
e09acddf | 486 | dst_cache_reset(&tunnel->dst_cache); |
3a43be3c | 487 | dev_put(dev); |
1da177e4 LT |
488 | } |
489 | ||
c73cb5a2 | 490 | static int ipip6_err(struct sk_buff *skb, u32 info) |
1da177e4 | 491 | { |
b71d1d42 | 492 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
88c7664f ACM |
493 | const int type = icmp_hdr(skb)->type; |
494 | const int code = icmp_hdr(skb)->code; | |
20e1954f | 495 | unsigned int data_len = 0; |
1da177e4 | 496 | struct ip_tunnel *t; |
3051fbec | 497 | int sifindex; |
c73cb5a2 | 498 | int err; |
1da177e4 LT |
499 | |
500 | switch (type) { | |
501 | default: | |
502 | case ICMP_PARAMETERPROB: | |
c73cb5a2 | 503 | return 0; |
1da177e4 LT |
504 | |
505 | case ICMP_DEST_UNREACH: | |
506 | switch (code) { | |
507 | case ICMP_SR_FAILED: | |
1da177e4 | 508 | /* Impossible event. */ |
c73cb5a2 | 509 | return 0; |
1da177e4 LT |
510 | default: |
511 | /* All others are translated to HOST_UNREACH. | |
512 | rfc2003 contains "deep thoughts" about NET_UNREACH, | |
513 | I believe they are just ether pollution. --ANK | |
514 | */ | |
515 | break; | |
516 | } | |
517 | break; | |
518 | case ICMP_TIME_EXCEEDED: | |
519 | if (code != ICMP_EXC_TTL) | |
c73cb5a2 | 520 | return 0; |
20e1954f | 521 | data_len = icmp_hdr(skb)->un.reserved[1] * 4; /* RFC 4884 4.1 */ |
1da177e4 | 522 | break; |
ec18d9a2 DM |
523 | case ICMP_REDIRECT: |
524 | break; | |
1da177e4 LT |
525 | } |
526 | ||
c73cb5a2 KM |
527 | err = -ENOENT; |
528 | ||
3051fbec DA |
529 | sifindex = netif_is_l3_master(skb->dev) ? IPCB(skb)->iif : 0; |
530 | t = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, | |
531 | iph->daddr, iph->saddr, sifindex); | |
63159f29 | 532 | if (!t) |
36393395 DM |
533 | goto out; |
534 | ||
535 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { | |
536 | ipv4_update_pmtu(skb, dev_net(skb->dev), info, | |
d5d8760b | 537 | t->parms.link, 0, iph->protocol, 0); |
36393395 DM |
538 | err = 0; |
539 | goto out; | |
540 | } | |
ec18d9a2 | 541 | if (type == ICMP_REDIRECT) { |
2346829e | 542 | ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0, |
d5d8760b | 543 | iph->protocol, 0); |
ec18d9a2 DM |
544 | err = 0; |
545 | goto out; | |
546 | } | |
36393395 | 547 | |
2d7a3b27 | 548 | err = 0; |
b8ade180 HL |
549 | if (__in6_dev_get(skb->dev) && |
550 | !ip6_err_gen_icmpv6_unreach(skb, iph->ihl * 4, type, data_len)) | |
1da177e4 | 551 | goto out; |
c73cb5a2 | 552 | |
2d7a3b27 | 553 | if (t->parms.iph.daddr == 0) |
ca15a078 OG |
554 | goto out; |
555 | ||
1da177e4 LT |
556 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
557 | goto out; | |
558 | ||
bb80087a | 559 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
1da177e4 LT |
560 | t->err_count++; |
561 | else | |
562 | t->err_count = 1; | |
563 | t->err_time = jiffies; | |
564 | out: | |
c73cb5a2 | 565 | return err; |
1da177e4 LT |
566 | } |
567 | ||
218774dc HFS |
568 | static inline bool is_spoofed_6rd(struct ip_tunnel *tunnel, const __be32 v4addr, |
569 | const struct in6_addr *v6addr) | |
570 | { | |
571 | __be32 v4embed = 0; | |
572 | if (check_6rd(tunnel, v6addr, &v4embed) && v4addr != v4embed) | |
573 | return true; | |
574 | return false; | |
575 | } | |
576 | ||
7df37ff3 CB |
577 | /* Checks if an address matches an address on the tunnel interface. |
578 | * Used to detect the NAT of proto 41 packets and let them pass spoofing test. | |
579 | * Long story: | |
580 | * This function is called after we considered the packet as spoofed | |
581 | * in is_spoofed_6rd. | |
582 | * We may have a router that is doing NAT for proto 41 packets | |
583 | * for an internal station. Destination a.a.a.a/PREFIX:bbbb:bbbb | |
584 | * will be translated to n.n.n.n/PREFIX:bbbb:bbbb. And is_spoofed_6rd | |
585 | * function will return true, dropping the packet. | |
586 | * But, we can still check if is spoofed against the IP | |
587 | * addresses associated with the interface. | |
588 | */ | |
589 | static bool only_dnatted(const struct ip_tunnel *tunnel, | |
590 | const struct in6_addr *v6dst) | |
591 | { | |
592 | int prefix_len; | |
593 | ||
594 | #ifdef CONFIG_IPV6_SIT_6RD | |
595 | prefix_len = tunnel->ip6rd.prefixlen + 32 | |
596 | - tunnel->ip6rd.relay_prefixlen; | |
597 | #else | |
598 | prefix_len = 48; | |
599 | #endif | |
600 | return ipv6_chk_custom_prefix(v6dst, prefix_len, tunnel->dev); | |
601 | } | |
602 | ||
603 | /* Returns true if a packet is spoofed */ | |
604 | static bool packet_is_spoofed(struct sk_buff *skb, | |
605 | const struct iphdr *iph, | |
606 | struct ip_tunnel *tunnel) | |
607 | { | |
608 | const struct ipv6hdr *ipv6h; | |
609 | ||
610 | if (tunnel->dev->priv_flags & IFF_ISATAP) { | |
611 | if (!isatap_chksrc(skb, iph, tunnel)) | |
612 | return true; | |
613 | ||
614 | return false; | |
615 | } | |
616 | ||
617 | if (tunnel->dev->flags & IFF_POINTOPOINT) | |
618 | return false; | |
619 | ||
620 | ipv6h = ipv6_hdr(skb); | |
621 | ||
622 | if (unlikely(is_spoofed_6rd(tunnel, iph->saddr, &ipv6h->saddr))) { | |
623 | net_warn_ratelimited("Src spoofed %pI4/%pI6c -> %pI4/%pI6c\n", | |
624 | &iph->saddr, &ipv6h->saddr, | |
625 | &iph->daddr, &ipv6h->daddr); | |
626 | return true; | |
627 | } | |
628 | ||
629 | if (likely(!is_spoofed_6rd(tunnel, iph->daddr, &ipv6h->daddr))) | |
630 | return false; | |
631 | ||
632 | if (only_dnatted(tunnel, &ipv6h->daddr)) | |
633 | return false; | |
634 | ||
635 | net_warn_ratelimited("Dst spoofed %pI4/%pI6c -> %pI4/%pI6c\n", | |
636 | &iph->saddr, &ipv6h->saddr, | |
637 | &iph->daddr, &ipv6h->daddr); | |
638 | return true; | |
639 | } | |
640 | ||
1da177e4 LT |
641 | static int ipip6_rcv(struct sk_buff *skb) |
642 | { | |
1ad759d8 | 643 | const struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 644 | struct ip_tunnel *tunnel; |
3051fbec | 645 | int sifindex; |
f4e0b4c5 | 646 | int err; |
1da177e4 | 647 | |
3051fbec | 648 | sifindex = netif_is_l3_master(skb->dev) ? IPCB(skb)->iif : 0; |
4fddbf5d | 649 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
3051fbec | 650 | iph->saddr, iph->daddr, sifindex); |
53b24b8f | 651 | if (tunnel) { |
8f84985f | 652 | struct pcpu_sw_netstats *tstats; |
15fc1f70 | 653 | |
32b8a8e5 ND |
654 | if (tunnel->parms.iph.protocol != IPPROTO_IPV6 && |
655 | tunnel->parms.iph.protocol != 0) | |
656 | goto out; | |
657 | ||
b0e380b1 | 658 | skb->mac_header = skb->network_header; |
c1d2bbe1 | 659 | skb_reset_network_header(skb); |
8cdfab8a | 660 | IPCB(skb)->flags = 0; |
a09a4c8d | 661 | skb->dev = tunnel->dev; |
c7dc89c0 | 662 | |
7df37ff3 CB |
663 | if (packet_is_spoofed(skb, iph, tunnel)) { |
664 | tunnel->dev->stats.rx_errors++; | |
665 | goto out; | |
f4e0b4c5 ND |
666 | } |
667 | ||
a09a4c8d JG |
668 | if (iptunnel_pull_header(skb, 0, htons(ETH_P_IPV6), |
669 | !net_eq(tunnel->net, dev_net(tunnel->dev)))) | |
670 | goto out; | |
f4e0b4c5 | 671 | |
3b2fbfd6 LB |
672 | /* skb can be uncloned in iptunnel_pull_header, so |
673 | * old iph is no longer valid | |
674 | */ | |
675 | iph = (const struct iphdr *)skb_mac_header(skb); | |
f4e0b4c5 ND |
676 | err = IP_ECN_decapsulate(iph, skb); |
677 | if (unlikely(err)) { | |
678 | if (log_ecn_error) | |
679 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", | |
680 | &iph->saddr, iph->tos); | |
681 | if (err > 1) { | |
682 | ++tunnel->dev->stats.rx_frame_errors; | |
683 | ++tunnel->dev->stats.rx_errors; | |
684 | goto out; | |
685 | } | |
c7dc89c0 | 686 | } |
d19d56dd | 687 | |
15fc1f70 | 688 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
c3ac17cd | 689 | u64_stats_update_begin(&tstats->syncp); |
15fc1f70 ED |
690 | tstats->rx_packets++; |
691 | tstats->rx_bytes += skb->len; | |
c3ac17cd | 692 | u64_stats_update_end(&tstats->syncp); |
15fc1f70 | 693 | |
caf586e5 | 694 | netif_rx(skb); |
8990f468 | 695 | |
1da177e4 LT |
696 | return 0; |
697 | } | |
698 | ||
6dcdd1b3 | 699 | /* no tunnel matched, let upstream know, ipsec may handle it */ |
6dcdd1b3 | 700 | return 1; |
1da177e4 | 701 | out: |
36ca34cc | 702 | kfree_skb(skb); |
1da177e4 LT |
703 | return 0; |
704 | } | |
705 | ||
49dbe7ae | 706 | static const struct tnl_ptk_info ipip_tpi = { |
32b8a8e5 ND |
707 | /* no tunnel info required for ipip. */ |
708 | .proto = htons(ETH_P_IP), | |
709 | }; | |
710 | ||
49dbe7ae SH |
711 | #if IS_ENABLED(CONFIG_MPLS) |
712 | static const struct tnl_ptk_info mplsip_tpi = { | |
713 | /* no tunnel info required for mplsip. */ | |
714 | .proto = htons(ETH_P_MPLS_UC), | |
715 | }; | |
716 | #endif | |
717 | ||
718 | static int sit_tunnel_rcv(struct sk_buff *skb, u8 ipproto) | |
32b8a8e5 | 719 | { |
3d7b46cd | 720 | const struct iphdr *iph; |
32b8a8e5 | 721 | struct ip_tunnel *tunnel; |
3051fbec DA |
722 | int sifindex; |
723 | ||
724 | sifindex = netif_is_l3_master(skb->dev) ? IPCB(skb)->iif : 0; | |
32b8a8e5 | 725 | |
3d7b46cd | 726 | iph = ip_hdr(skb); |
32b8a8e5 | 727 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
3051fbec | 728 | iph->saddr, iph->daddr, sifindex); |
53b24b8f | 729 | if (tunnel) { |
49dbe7ae SH |
730 | const struct tnl_ptk_info *tpi; |
731 | ||
732 | if (tunnel->parms.iph.protocol != ipproto && | |
32b8a8e5 ND |
733 | tunnel->parms.iph.protocol != 0) |
734 | goto drop; | |
735 | ||
736 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
737 | goto drop; | |
49dbe7ae SH |
738 | #if IS_ENABLED(CONFIG_MPLS) |
739 | if (ipproto == IPPROTO_MPLS) | |
740 | tpi = &mplsip_tpi; | |
741 | else | |
742 | #endif | |
743 | tpi = &ipip_tpi; | |
744 | if (iptunnel_pull_header(skb, 0, tpi->proto, false)) | |
737e828b | 745 | goto drop; |
49dbe7ae | 746 | return ip_tunnel_rcv(tunnel, skb, tpi, NULL, log_ecn_error); |
32b8a8e5 ND |
747 | } |
748 | ||
749 | return 1; | |
750 | ||
751 | drop: | |
752 | kfree_skb(skb); | |
753 | return 0; | |
754 | } | |
755 | ||
49dbe7ae SH |
756 | static int ipip_rcv(struct sk_buff *skb) |
757 | { | |
758 | return sit_tunnel_rcv(skb, IPPROTO_IPIP); | |
759 | } | |
760 | ||
761 | #if IS_ENABLED(CONFIG_MPLS) | |
762 | static int mplsip_rcv(struct sk_buff *skb) | |
763 | { | |
764 | return sit_tunnel_rcv(skb, IPPROTO_MPLS); | |
765 | } | |
766 | #endif | |
767 | ||
fa857afc | 768 | /* |
218774dc HFS |
769 | * If the IPv6 address comes from 6rd / 6to4 (RFC 3056) addr space this function |
770 | * stores the embedded IPv4 address in v4dst and returns true. | |
fa857afc | 771 | */ |
218774dc HFS |
772 | static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst, |
773 | __be32 *v4dst) | |
1da177e4 | 774 | { |
fa857afc YH |
775 | #ifdef CONFIG_IPV6_SIT_6RD |
776 | if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix, | |
777 | tunnel->ip6rd.prefixlen)) { | |
3a43be3c | 778 | unsigned int pbw0, pbi0; |
fa857afc YH |
779 | int pbi1; |
780 | u32 d; | |
781 | ||
782 | pbw0 = tunnel->ip6rd.prefixlen >> 5; | |
783 | pbi0 = tunnel->ip6rd.prefixlen & 0x1f; | |
784 | ||
b3e4d8f8 ML |
785 | d = tunnel->ip6rd.relay_prefixlen < 32 ? |
786 | (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >> | |
787 | tunnel->ip6rd.relay_prefixlen : 0; | |
fa857afc YH |
788 | |
789 | pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen; | |
790 | if (pbi1 > 0) | |
e7db38c3 | 791 | d |= ntohl(v6dst->s6_addr32[pbw0 + 1]) >> |
fa857afc YH |
792 | (32 - pbi1); |
793 | ||
218774dc HFS |
794 | *v4dst = tunnel->ip6rd.relay_prefix | htonl(d); |
795 | return true; | |
fa857afc YH |
796 | } |
797 | #else | |
1da177e4 | 798 | if (v6dst->s6_addr16[0] == htons(0x2002)) { |
1ab1457c | 799 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
218774dc HFS |
800 | memcpy(v4dst, &v6dst->s6_addr16[1], 4); |
801 | return true; | |
1da177e4 | 802 | } |
fa857afc | 803 | #endif |
218774dc HFS |
804 | return false; |
805 | } | |
806 | ||
807 | static inline __be32 try_6rd(struct ip_tunnel *tunnel, | |
808 | const struct in6_addr *v6dst) | |
809 | { | |
810 | __be32 dst = 0; | |
811 | check_6rd(tunnel, v6dst, &dst); | |
1da177e4 LT |
812 | return dst; |
813 | } | |
814 | ||
815 | /* | |
816 | * This function assumes it is being called from dev_queue_xmit() | |
817 | * and that skb is filled properly by that function. | |
818 | */ | |
819 | ||
6fef4c0c SH |
820 | static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, |
821 | struct net_device *dev) | |
1da177e4 | 822 | { |
2941a486 | 823 | struct ip_tunnel *tunnel = netdev_priv(dev); |
b71d1d42 ED |
824 | const struct iphdr *tiph = &tunnel->parms.iph; |
825 | const struct ipv6hdr *iph6 = ipv6_hdr(skb); | |
1da177e4 | 826 | u8 tos = tunnel->parms.iph.tos; |
292f4f3c | 827 | __be16 df = tiph->frag_off; |
67ba4152 IM |
828 | struct rtable *rt; /* Route to the other host */ |
829 | struct net_device *tdev; /* Device to other host */ | |
830 | unsigned int max_headroom; /* The extra header space needed */ | |
e69a4adc | 831 | __be32 dst = tiph->daddr; |
31e4543d | 832 | struct flowi4 fl4; |
1da177e4 | 833 | int mtu; |
b71d1d42 | 834 | const struct in6_addr *addr6; |
1da177e4 | 835 | int addr_type; |
0e6fbc5b | 836 | u8 ttl; |
14909664 TH |
837 | u8 protocol = IPPROTO_IPV6; |
838 | int t_hlen = tunnel->hlen + sizeof(struct iphdr); | |
1da177e4 | 839 | |
c2bceb3d LEM |
840 | if (tos == 1) |
841 | tos = ipv6_get_dsfield(iph6); | |
842 | ||
c7dc89c0 FT |
843 | /* ISATAP (RFC4214) - must come before 6to4 */ |
844 | if (dev->priv_flags & IFF_ISATAP) { | |
845 | struct neighbour *neigh = NULL; | |
1e2927b0 | 846 | bool do_tx_error = false; |
c7dc89c0 | 847 | |
adf30907 | 848 | if (skb_dst(skb)) |
1e2927b0 | 849 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
c7dc89c0 | 850 | |
63159f29 | 851 | if (!neigh) { |
7df37ff3 | 852 | net_dbg_ratelimited("nexthop == NULL\n"); |
c7dc89c0 FT |
853 | goto tx_error; |
854 | } | |
855 | ||
3e866703 | 856 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
c7dc89c0 FT |
857 | addr_type = ipv6_addr_type(addr6); |
858 | ||
859 | if ((addr_type & IPV6_ADDR_UNICAST) && | |
860 | ipv6_addr_is_isatap(addr6)) | |
861 | dst = addr6->s6_addr32[3]; | |
862 | else | |
1e2927b0 DM |
863 | do_tx_error = true; |
864 | ||
865 | neigh_release(neigh); | |
866 | if (do_tx_error) | |
c7dc89c0 FT |
867 | goto tx_error; |
868 | } | |
869 | ||
1da177e4 | 870 | if (!dst) |
218774dc | 871 | dst = try_6rd(tunnel, &iph6->daddr); |
1da177e4 LT |
872 | |
873 | if (!dst) { | |
874 | struct neighbour *neigh = NULL; | |
1e2927b0 | 875 | bool do_tx_error = false; |
1da177e4 | 876 | |
adf30907 | 877 | if (skb_dst(skb)) |
1e2927b0 | 878 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
1da177e4 | 879 | |
63159f29 | 880 | if (!neigh) { |
7df37ff3 | 881 | net_dbg_ratelimited("nexthop == NULL\n"); |
1da177e4 LT |
882 | goto tx_error; |
883 | } | |
884 | ||
3e866703 | 885 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
1da177e4 LT |
886 | addr_type = ipv6_addr_type(addr6); |
887 | ||
888 | if (addr_type == IPV6_ADDR_ANY) { | |
0660e03f | 889 | addr6 = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
890 | addr_type = ipv6_addr_type(addr6); |
891 | } | |
892 | ||
1e2927b0 DM |
893 | if ((addr_type & IPV6_ADDR_COMPATv4) != 0) |
894 | dst = addr6->s6_addr32[3]; | |
895 | else | |
896 | do_tx_error = true; | |
1da177e4 | 897 | |
1e2927b0 DM |
898 | neigh_release(neigh); |
899 | if (do_tx_error) | |
900 | goto tx_error; | |
1da177e4 LT |
901 | } |
902 | ||
9830ad4c CG |
903 | flowi4_init_output(&fl4, tunnel->parms.link, tunnel->fwmark, |
904 | RT_TOS(tos), RT_SCOPE_UNIVERSE, IPPROTO_IPV6, | |
905 | 0, dst, tiph->saddr, 0, 0, | |
906 | sock_net_uid(tunnel->net, NULL)); | |
907 | rt = ip_route_output_flow(tunnel->net, &fl4, NULL); | |
908 | ||
78fbfd8a DM |
909 | if (IS_ERR(rt)) { |
910 | dev->stats.tx_carrier_errors++; | |
911 | goto tx_error_icmp; | |
1da177e4 LT |
912 | } |
913 | if (rt->rt_type != RTN_UNICAST) { | |
914 | ip_rt_put(rt); | |
15fc1f70 | 915 | dev->stats.tx_carrier_errors++; |
1da177e4 LT |
916 | goto tx_error_icmp; |
917 | } | |
d8d1f30b | 918 | tdev = rt->dst.dev; |
1da177e4 LT |
919 | |
920 | if (tdev == dev) { | |
921 | ip_rt_put(rt); | |
15fc1f70 | 922 | dev->stats.collisions++; |
1da177e4 LT |
923 | goto tx_error; |
924 | } | |
925 | ||
7e13318d | 926 | if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4)) { |
14909664 | 927 | ip_rt_put(rt); |
aed069df | 928 | goto tx_error; |
14909664 TH |
929 | } |
930 | ||
292f4f3c | 931 | if (df) { |
14909664 | 932 | mtu = dst_mtu(&rt->dst) - t_hlen; |
1da177e4 | 933 | |
292f4f3c | 934 | if (mtu < 68) { |
15fc1f70 | 935 | dev->stats.collisions++; |
292f4f3c HX |
936 | ip_rt_put(rt); |
937 | goto tx_error; | |
938 | } | |
1da177e4 | 939 | |
292f4f3c HX |
940 | if (mtu < IPV6_MIN_MTU) { |
941 | mtu = IPV6_MIN_MTU; | |
942 | df = 0; | |
943 | } | |
944 | ||
f15ca723 ND |
945 | if (tunnel->parms.iph.daddr) |
946 | skb_dst_update_pmtu(skb, mtu); | |
292f4f3c | 947 | |
58a47824 | 948 | if (skb->len > mtu && !skb_is_gso(skb)) { |
3ffe533c | 949 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
292f4f3c HX |
950 | ip_rt_put(rt); |
951 | goto tx_error; | |
952 | } | |
1da177e4 LT |
953 | } |
954 | ||
955 | if (tunnel->err_count > 0) { | |
bb80087a WY |
956 | if (time_before(jiffies, |
957 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { | |
1da177e4 LT |
958 | tunnel->err_count--; |
959 | dst_link_failure(skb); | |
960 | } else | |
961 | tunnel->err_count = 0; | |
962 | } | |
963 | ||
964 | /* | |
965 | * Okay, now see if we can stuff it in the buffer as-is. | |
966 | */ | |
14909664 | 967 | max_headroom = LL_RESERVED_SPACE(tdev) + t_hlen; |
1da177e4 | 968 | |
cfbba49d PM |
969 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
970 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { | |
1da177e4 LT |
971 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
972 | if (!new_skb) { | |
973 | ip_rt_put(rt); | |
15fc1f70 | 974 | dev->stats.tx_dropped++; |
66028310 | 975 | kfree_skb(skb); |
6ed10654 | 976 | return NETDEV_TX_OK; |
1da177e4 LT |
977 | } |
978 | if (skb->sk) | |
979 | skb_set_owner_w(new_skb, skb->sk); | |
980 | dev_kfree_skb(skb); | |
981 | skb = new_skb; | |
0660e03f | 982 | iph6 = ipv6_hdr(skb); |
1da177e4 | 983 | } |
0e6fbc5b PS |
984 | ttl = tiph->ttl; |
985 | if (ttl == 0) | |
986 | ttl = iph6->hop_limit; | |
987 | tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); | |
1da177e4 | 988 | |
14909664 | 989 | if (ip_tunnel_encap(skb, tunnel, &protocol, &fl4) < 0) { |
6a9eadcc | 990 | ip_rt_put(rt); |
14909664 | 991 | goto tx_error; |
6a9eadcc | 992 | } |
3d483058 | 993 | |
469471cd TH |
994 | skb_set_inner_ipproto(skb, IPPROTO_IPV6); |
995 | ||
039f5062 PS |
996 | iptunnel_xmit(NULL, rt, skb, fl4.saddr, fl4.daddr, protocol, tos, ttl, |
997 | df, !net_eq(tunnel->net, dev_net(dev))); | |
6ed10654 | 998 | return NETDEV_TX_OK; |
1da177e4 LT |
999 | |
1000 | tx_error_icmp: | |
1001 | dst_link_failure(skb); | |
1002 | tx_error: | |
66028310 | 1003 | kfree_skb(skb); |
61c1db7f | 1004 | dev->stats.tx_errors++; |
6ed10654 | 1005 | return NETDEV_TX_OK; |
1da177e4 LT |
1006 | } |
1007 | ||
49dbe7ae SH |
1008 | static netdev_tx_t sit_tunnel_xmit__(struct sk_buff *skb, |
1009 | struct net_device *dev, u8 ipproto) | |
32b8a8e5 ND |
1010 | { |
1011 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
1012 | const struct iphdr *tiph = &tunnel->parms.iph; | |
1013 | ||
7e13318d | 1014 | if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4)) |
aed069df | 1015 | goto tx_error; |
32b8a8e5 | 1016 | |
49dbe7ae | 1017 | skb_set_inner_ipproto(skb, ipproto); |
469471cd | 1018 | |
49dbe7ae | 1019 | ip_tunnel_xmit(skb, dev, tiph, ipproto); |
32b8a8e5 | 1020 | return NETDEV_TX_OK; |
aed069df AD |
1021 | tx_error: |
1022 | kfree_skb(skb); | |
61c1db7f ED |
1023 | dev->stats.tx_errors++; |
1024 | return NETDEV_TX_OK; | |
32b8a8e5 ND |
1025 | } |
1026 | ||
1027 | static netdev_tx_t sit_tunnel_xmit(struct sk_buff *skb, | |
1028 | struct net_device *dev) | |
1029 | { | |
78afc98e WB |
1030 | if (!pskb_inet_may_pull(skb)) |
1031 | goto tx_err; | |
1032 | ||
32b8a8e5 ND |
1033 | switch (skb->protocol) { |
1034 | case htons(ETH_P_IP): | |
49dbe7ae | 1035 | sit_tunnel_xmit__(skb, dev, IPPROTO_IPIP); |
32b8a8e5 ND |
1036 | break; |
1037 | case htons(ETH_P_IPV6): | |
1038 | ipip6_tunnel_xmit(skb, dev); | |
1039 | break; | |
49dbe7ae SH |
1040 | #if IS_ENABLED(CONFIG_MPLS) |
1041 | case htons(ETH_P_MPLS_UC): | |
1042 | sit_tunnel_xmit__(skb, dev, IPPROTO_MPLS); | |
1043 | break; | |
1044 | #endif | |
32b8a8e5 ND |
1045 | default: |
1046 | goto tx_err; | |
1047 | } | |
1048 | ||
1049 | return NETDEV_TX_OK; | |
1050 | ||
1051 | tx_err: | |
1052 | dev->stats.tx_errors++; | |
66028310 | 1053 | kfree_skb(skb); |
32b8a8e5 ND |
1054 | return NETDEV_TX_OK; |
1055 | ||
1056 | } | |
1057 | ||
8a4a50f9 MS |
1058 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
1059 | { | |
1060 | struct net_device *tdev = NULL; | |
1061 | struct ip_tunnel *tunnel; | |
b71d1d42 | 1062 | const struct iphdr *iph; |
31e4543d | 1063 | struct flowi4 fl4; |
8a4a50f9 MS |
1064 | |
1065 | tunnel = netdev_priv(dev); | |
1066 | iph = &tunnel->parms.iph; | |
1067 | ||
1068 | if (iph->daddr) { | |
5e6700b3 ND |
1069 | struct rtable *rt = ip_route_output_ports(tunnel->net, &fl4, |
1070 | NULL, | |
78fbfd8a DM |
1071 | iph->daddr, iph->saddr, |
1072 | 0, 0, | |
1073 | IPPROTO_IPV6, | |
1074 | RT_TOS(iph->tos), | |
1075 | tunnel->parms.link); | |
b23dd4fe DM |
1076 | |
1077 | if (!IS_ERR(rt)) { | |
d8d1f30b | 1078 | tdev = rt->dst.dev; |
8a4a50f9 MS |
1079 | ip_rt_put(rt); |
1080 | } | |
1081 | dev->flags |= IFF_POINTOPOINT; | |
1082 | } | |
1083 | ||
1084 | if (!tdev && tunnel->parms.link) | |
5e6700b3 | 1085 | tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link); |
8a4a50f9 | 1086 | |
d081a5f1 | 1087 | if (tdev && !netif_is_l3_master(tdev)) { |
14909664 TH |
1088 | int t_hlen = tunnel->hlen + sizeof(struct iphdr); |
1089 | ||
8a4a50f9 | 1090 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); |
14909664 | 1091 | dev->mtu = tdev->mtu - t_hlen; |
8a4a50f9 MS |
1092 | if (dev->mtu < IPV6_MIN_MTU) |
1093 | dev->mtu = IPV6_MIN_MTU; | |
1094 | } | |
8a4a50f9 MS |
1095 | } |
1096 | ||
9830ad4c CG |
1097 | static void ipip6_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p, |
1098 | __u32 fwmark) | |
f3723416 | 1099 | { |
5e6700b3 | 1100 | struct net *net = t->net; |
f3723416 ND |
1101 | struct sit_net *sitn = net_generic(net, sit_net_id); |
1102 | ||
1103 | ipip6_tunnel_unlink(sitn, t); | |
1104 | synchronize_net(); | |
1105 | t->parms.iph.saddr = p->iph.saddr; | |
1106 | t->parms.iph.daddr = p->iph.daddr; | |
1107 | memcpy(t->dev->dev_addr, &p->iph.saddr, 4); | |
1108 | memcpy(t->dev->broadcast, &p->iph.daddr, 4); | |
1109 | ipip6_tunnel_link(sitn, t); | |
1110 | t->parms.iph.ttl = p->iph.ttl; | |
1111 | t->parms.iph.tos = p->iph.tos; | |
f859b4af | 1112 | t->parms.iph.frag_off = p->iph.frag_off; |
9830ad4c | 1113 | if (t->parms.link != p->link || t->fwmark != fwmark) { |
f3723416 | 1114 | t->parms.link = p->link; |
9830ad4c | 1115 | t->fwmark = fwmark; |
f3723416 ND |
1116 | ipip6_tunnel_bind_dev(t->dev); |
1117 | } | |
e09acddf | 1118 | dst_cache_reset(&t->dst_cache); |
f3723416 ND |
1119 | netdev_state_change(t->dev); |
1120 | } | |
1121 | ||
e2f1f072 ND |
1122 | #ifdef CONFIG_IPV6_SIT_6RD |
1123 | static int ipip6_tunnel_update_6rd(struct ip_tunnel *t, | |
1124 | struct ip_tunnel_6rd *ip6rd) | |
1125 | { | |
1126 | struct in6_addr prefix; | |
1127 | __be32 relay_prefix; | |
1128 | ||
1129 | if (ip6rd->relay_prefixlen > 32 || | |
1130 | ip6rd->prefixlen + (32 - ip6rd->relay_prefixlen) > 64) | |
1131 | return -EINVAL; | |
1132 | ||
1133 | ipv6_addr_prefix(&prefix, &ip6rd->prefix, ip6rd->prefixlen); | |
1134 | if (!ipv6_addr_equal(&prefix, &ip6rd->prefix)) | |
1135 | return -EINVAL; | |
1136 | if (ip6rd->relay_prefixlen) | |
1137 | relay_prefix = ip6rd->relay_prefix & | |
1138 | htonl(0xffffffffUL << | |
1139 | (32 - ip6rd->relay_prefixlen)); | |
1140 | else | |
1141 | relay_prefix = 0; | |
1142 | if (relay_prefix != ip6rd->relay_prefix) | |
1143 | return -EINVAL; | |
1144 | ||
1145 | t->ip6rd.prefix = prefix; | |
1146 | t->ip6rd.relay_prefix = relay_prefix; | |
1147 | t->ip6rd.prefixlen = ip6rd->prefixlen; | |
1148 | t->ip6rd.relay_prefixlen = ip6rd->relay_prefixlen; | |
e09acddf | 1149 | dst_cache_reset(&t->dst_cache); |
e2f1f072 ND |
1150 | netdev_state_change(t->dev); |
1151 | return 0; | |
1152 | } | |
1153 | #endif | |
1154 | ||
03ff4979 | 1155 | static bool ipip6_valid_ip_proto(u8 ipproto) |
49dbe7ae SH |
1156 | { |
1157 | return ipproto == IPPROTO_IPV6 || | |
1158 | ipproto == IPPROTO_IPIP || | |
1159 | #if IS_ENABLED(CONFIG_MPLS) | |
1160 | ipproto == IPPROTO_MPLS || | |
1161 | #endif | |
1162 | ipproto == 0; | |
1163 | } | |
1164 | ||
1da177e4 | 1165 | static int |
67ba4152 | 1166 | ipip6_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 LT |
1167 | { |
1168 | int err = 0; | |
1169 | struct ip_tunnel_parm p; | |
fadf6bf0 | 1170 | struct ip_tunnel_prl prl; |
9aad77c3 ND |
1171 | struct ip_tunnel *t = netdev_priv(dev); |
1172 | struct net *net = t->net; | |
ca8def14 | 1173 | struct sit_net *sitn = net_generic(net, sit_net_id); |
fa857afc YH |
1174 | #ifdef CONFIG_IPV6_SIT_6RD |
1175 | struct ip_tunnel_6rd ip6rd; | |
1176 | #endif | |
1da177e4 LT |
1177 | |
1178 | switch (cmd) { | |
1179 | case SIOCGETTUNNEL: | |
fa857afc YH |
1180 | #ifdef CONFIG_IPV6_SIT_6RD |
1181 | case SIOCGET6RD: | |
1182 | #endif | |
cd3dbc19 | 1183 | if (dev == sitn->fb_tunnel_dev) { |
1da177e4 LT |
1184 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
1185 | err = -EFAULT; | |
1186 | break; | |
1187 | } | |
ca8def14 | 1188 | t = ipip6_tunnel_locate(net, &p, 0); |
63159f29 | 1189 | if (!t) |
9aad77c3 | 1190 | t = netdev_priv(dev); |
1da177e4 | 1191 | } |
fa857afc YH |
1192 | |
1193 | err = -EFAULT; | |
1194 | if (cmd == SIOCGETTUNNEL) { | |
1195 | memcpy(&p, &t->parms, sizeof(p)); | |
1196 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, | |
1197 | sizeof(p))) | |
1198 | goto done; | |
1199 | #ifdef CONFIG_IPV6_SIT_6RD | |
1200 | } else { | |
4e3fd7a0 | 1201 | ip6rd.prefix = t->ip6rd.prefix; |
fa857afc YH |
1202 | ip6rd.relay_prefix = t->ip6rd.relay_prefix; |
1203 | ip6rd.prefixlen = t->ip6rd.prefixlen; | |
1204 | ip6rd.relay_prefixlen = t->ip6rd.relay_prefixlen; | |
1205 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, | |
1206 | sizeof(ip6rd))) | |
1207 | goto done; | |
1208 | #endif | |
1209 | } | |
1210 | err = 0; | |
1da177e4 LT |
1211 | break; |
1212 | ||
1213 | case SIOCADDTUNNEL: | |
1214 | case SIOCCHGTUNNEL: | |
1215 | err = -EPERM; | |
af31f412 | 1216 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1217 | goto done; |
1218 | ||
1219 | err = -EFAULT; | |
1220 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1221 | goto done; | |
1222 | ||
1223 | err = -EINVAL; | |
49dbe7ae | 1224 | if (!ipip6_valid_ip_proto(p.iph.protocol)) |
32b8a8e5 ND |
1225 | goto done; |
1226 | if (p.iph.version != 4 || | |
1da177e4 LT |
1227 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
1228 | goto done; | |
1229 | if (p.iph.ttl) | |
1230 | p.iph.frag_off |= htons(IP_DF); | |
1231 | ||
ca8def14 | 1232 | t = ipip6_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
1da177e4 | 1233 | |
cd3dbc19 | 1234 | if (dev != sitn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
53b24b8f | 1235 | if (t) { |
1da177e4 LT |
1236 | if (t->dev != dev) { |
1237 | err = -EEXIST; | |
1238 | break; | |
1239 | } | |
1240 | } else { | |
1241 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || | |
1242 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { | |
1243 | err = -EINVAL; | |
1244 | break; | |
1245 | } | |
2941a486 | 1246 | t = netdev_priv(dev); |
1da177e4 | 1247 | } |
f9cd5a55 | 1248 | |
9830ad4c | 1249 | ipip6_tunnel_update(t, &p, t->fwmark); |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | if (t) { | |
1253 | err = 0; | |
1da177e4 LT |
1254 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
1255 | err = -EFAULT; | |
1256 | } else | |
1257 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); | |
1258 | break; | |
1259 | ||
1260 | case SIOCDELTUNNEL: | |
1261 | err = -EPERM; | |
af31f412 | 1262 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
1263 | goto done; |
1264 | ||
cd3dbc19 | 1265 | if (dev == sitn->fb_tunnel_dev) { |
1da177e4 LT |
1266 | err = -EFAULT; |
1267 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) | |
1268 | goto done; | |
1269 | err = -ENOENT; | |
e5d08d71 | 1270 | t = ipip6_tunnel_locate(net, &p, 0); |
63159f29 | 1271 | if (!t) |
1da177e4 LT |
1272 | goto done; |
1273 | err = -EPERM; | |
cd3dbc19 | 1274 | if (t == netdev_priv(sitn->fb_tunnel_dev)) |
1da177e4 LT |
1275 | goto done; |
1276 | dev = t->dev; | |
1277 | } | |
22f8cde5 SH |
1278 | unregister_netdevice(dev); |
1279 | err = 0; | |
1da177e4 LT |
1280 | break; |
1281 | ||
300aaeea | 1282 | case SIOCGETPRL: |
2b4743bd YH |
1283 | err = -EINVAL; |
1284 | if (dev == sitn->fb_tunnel_dev) | |
1285 | goto done; | |
2b4743bd YH |
1286 | err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data); |
1287 | break; | |
1288 | ||
fadf6bf0 TF |
1289 | case SIOCADDPRL: |
1290 | case SIOCDELPRL: | |
1291 | case SIOCCHGPRL: | |
1292 | err = -EPERM; | |
af31f412 | 1293 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
fadf6bf0 TF |
1294 | goto done; |
1295 | err = -EINVAL; | |
cd3dbc19 | 1296 | if (dev == sitn->fb_tunnel_dev) |
fadf6bf0 TF |
1297 | goto done; |
1298 | err = -EFAULT; | |
1299 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) | |
1300 | goto done; | |
fadf6bf0 | 1301 | |
300aaeea | 1302 | switch (cmd) { |
300aaeea | 1303 | case SIOCDELPRL: |
fadf6bf0 | 1304 | err = ipip6_tunnel_del_prl(t, &prl); |
300aaeea YH |
1305 | break; |
1306 | case SIOCADDPRL: | |
1307 | case SIOCCHGPRL: | |
fadf6bf0 | 1308 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); |
300aaeea YH |
1309 | break; |
1310 | } | |
e09acddf | 1311 | dst_cache_reset(&t->dst_cache); |
2b4743bd | 1312 | netdev_state_change(dev); |
fadf6bf0 TF |
1313 | break; |
1314 | ||
fa857afc YH |
1315 | #ifdef CONFIG_IPV6_SIT_6RD |
1316 | case SIOCADD6RD: | |
1317 | case SIOCCHG6RD: | |
1318 | case SIOCDEL6RD: | |
1319 | err = -EPERM; | |
af31f412 | 1320 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
fa857afc YH |
1321 | goto done; |
1322 | ||
1323 | err = -EFAULT; | |
1324 | if (copy_from_user(&ip6rd, ifr->ifr_ifru.ifru_data, | |
1325 | sizeof(ip6rd))) | |
1326 | goto done; | |
1327 | ||
fa857afc | 1328 | if (cmd != SIOCDEL6RD) { |
e2f1f072 ND |
1329 | err = ipip6_tunnel_update_6rd(t, &ip6rd); |
1330 | if (err < 0) | |
fa857afc | 1331 | goto done; |
fa857afc | 1332 | } else |
e0c93948 | 1333 | ipip6_tunnel_clone_6rd(dev, sitn); |
fa857afc YH |
1334 | |
1335 | err = 0; | |
1336 | break; | |
1337 | #endif | |
1338 | ||
1da177e4 LT |
1339 | default: |
1340 | err = -EINVAL; | |
1341 | } | |
1342 | ||
1343 | done: | |
1344 | return err; | |
1345 | } | |
1346 | ||
1326c3d5 | 1347 | static const struct net_device_ops ipip6_netdev_ops = { |
ebe084aa | 1348 | .ndo_init = ipip6_tunnel_init, |
1326c3d5 | 1349 | .ndo_uninit = ipip6_tunnel_uninit, |
32b8a8e5 | 1350 | .ndo_start_xmit = sit_tunnel_xmit, |
1326c3d5 | 1351 | .ndo_do_ioctl = ipip6_tunnel_ioctl, |
f61dd388 | 1352 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
1e99584b | 1353 | .ndo_get_iflink = ip_tunnel_get_iflink, |
1326c3d5 SH |
1354 | }; |
1355 | ||
15fc1f70 ED |
1356 | static void ipip6_dev_free(struct net_device *dev) |
1357 | { | |
cf71d2bc ND |
1358 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1359 | ||
e09acddf | 1360 | dst_cache_destroy(&tunnel->dst_cache); |
15fc1f70 | 1361 | free_percpu(dev->tstats); |
15fc1f70 ED |
1362 | } |
1363 | ||
61c1db7f ED |
1364 | #define SIT_FEATURES (NETIF_F_SG | \ |
1365 | NETIF_F_FRAGLIST | \ | |
1366 | NETIF_F_HIGHDMA | \ | |
1367 | NETIF_F_GSO_SOFTWARE | \ | |
1368 | NETIF_F_HW_CSUM) | |
1369 | ||
1da177e4 LT |
1370 | static void ipip6_tunnel_setup(struct net_device *dev) |
1371 | { | |
14909664 TH |
1372 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1373 | int t_hlen = tunnel->hlen + sizeof(struct iphdr); | |
1374 | ||
1326c3d5 | 1375 | dev->netdev_ops = &ipip6_netdev_ops; |
cf124db5 DM |
1376 | dev->needs_free_netdev = true; |
1377 | dev->priv_destructor = ipip6_dev_free; | |
1da177e4 LT |
1378 | |
1379 | dev->type = ARPHRD_SIT; | |
14909664 TH |
1380 | dev->hard_header_len = LL_MAX_HEADER + t_hlen; |
1381 | dev->mtu = ETH_DATA_LEN - t_hlen; | |
b96f9afe | 1382 | dev->min_mtu = IPV6_MIN_MTU; |
d700aa8b | 1383 | dev->max_mtu = IP6_MAX_MTU - t_hlen; |
1da177e4 | 1384 | dev->flags = IFF_NOARP; |
02875878 | 1385 | netif_keep_dst(dev); |
1da177e4 | 1386 | dev->addr_len = 4; |
8df40d10 | 1387 | dev->features |= NETIF_F_LLTX; |
61c1db7f ED |
1388 | dev->features |= SIT_FEATURES; |
1389 | dev->hw_features |= SIT_FEATURES; | |
1da177e4 LT |
1390 | } |
1391 | ||
15fc1f70 | 1392 | static int ipip6_tunnel_init(struct net_device *dev) |
1da177e4 | 1393 | { |
1326c3d5 | 1394 | struct ip_tunnel *tunnel = netdev_priv(dev); |
e09acddf | 1395 | int err; |
1da177e4 LT |
1396 | |
1397 | tunnel->dev = dev; | |
5e6700b3 | 1398 | tunnel->net = dev_net(dev); |
ebe084aa | 1399 | strcpy(tunnel->parms.name, dev->name); |
1da177e4 | 1400 | |
8a4a50f9 | 1401 | ipip6_tunnel_bind_dev(dev); |
1c213bd2 | 1402 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
15fc1f70 ED |
1403 | if (!dev->tstats) |
1404 | return -ENOMEM; | |
1405 | ||
e09acddf PA |
1406 | err = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); |
1407 | if (err) { | |
cf71d2bc | 1408 | free_percpu(dev->tstats); |
d7426c69 | 1409 | dev->tstats = NULL; |
e09acddf | 1410 | return err; |
cf71d2bc ND |
1411 | } |
1412 | ||
15fc1f70 | 1413 | return 0; |
1da177e4 LT |
1414 | } |
1415 | ||
4ece9009 | 1416 | static void __net_init ipip6_fb_tunnel_init(struct net_device *dev) |
1da177e4 | 1417 | { |
2941a486 | 1418 | struct ip_tunnel *tunnel = netdev_priv(dev); |
1da177e4 | 1419 | struct iphdr *iph = &tunnel->parms.iph; |
29182176 PE |
1420 | struct net *net = dev_net(dev); |
1421 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
1da177e4 | 1422 | |
1da177e4 LT |
1423 | iph->version = 4; |
1424 | iph->protocol = IPPROTO_IPV6; | |
1425 | iph->ihl = 5; | |
1426 | iph->ttl = 64; | |
1427 | ||
1428 | dev_hold(dev); | |
cf778b00 | 1429 | rcu_assign_pointer(sitn->tunnels_wc[0], tunnel); |
1da177e4 LT |
1430 | } |
1431 | ||
a8b8a889 MS |
1432 | static int ipip6_validate(struct nlattr *tb[], struct nlattr *data[], |
1433 | struct netlink_ext_ack *extack) | |
32b8a8e5 ND |
1434 | { |
1435 | u8 proto; | |
1436 | ||
c2ff682a | 1437 | if (!data || !data[IFLA_IPTUN_PROTO]) |
32b8a8e5 ND |
1438 | return 0; |
1439 | ||
1440 | proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
49dbe7ae | 1441 | if (!ipip6_valid_ip_proto(proto)) |
32b8a8e5 ND |
1442 | return -EINVAL; |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | ||
f3723416 | 1447 | static void ipip6_netlink_parms(struct nlattr *data[], |
9830ad4c CG |
1448 | struct ip_tunnel_parm *parms, |
1449 | __u32 *fwmark) | |
f3723416 ND |
1450 | { |
1451 | memset(parms, 0, sizeof(*parms)); | |
1452 | ||
1453 | parms->iph.version = 4; | |
1454 | parms->iph.protocol = IPPROTO_IPV6; | |
1455 | parms->iph.ihl = 5; | |
1456 | parms->iph.ttl = 64; | |
1457 | ||
1458 | if (!data) | |
1459 | return; | |
1460 | ||
1461 | if (data[IFLA_IPTUN_LINK]) | |
1462 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); | |
1463 | ||
1464 | if (data[IFLA_IPTUN_LOCAL]) | |
d440b720 | 1465 | parms->iph.saddr = nla_get_be32(data[IFLA_IPTUN_LOCAL]); |
f3723416 ND |
1466 | |
1467 | if (data[IFLA_IPTUN_REMOTE]) | |
d440b720 | 1468 | parms->iph.daddr = nla_get_be32(data[IFLA_IPTUN_REMOTE]); |
f3723416 ND |
1469 | |
1470 | if (data[IFLA_IPTUN_TTL]) { | |
1471 | parms->iph.ttl = nla_get_u8(data[IFLA_IPTUN_TTL]); | |
1472 | if (parms->iph.ttl) | |
1473 | parms->iph.frag_off = htons(IP_DF); | |
1474 | } | |
1475 | ||
1476 | if (data[IFLA_IPTUN_TOS]) | |
1477 | parms->iph.tos = nla_get_u8(data[IFLA_IPTUN_TOS]); | |
1478 | ||
1479 | if (!data[IFLA_IPTUN_PMTUDISC] || nla_get_u8(data[IFLA_IPTUN_PMTUDISC])) | |
1480 | parms->iph.frag_off = htons(IP_DF); | |
1481 | ||
1482 | if (data[IFLA_IPTUN_FLAGS]) | |
d440b720 | 1483 | parms->i_flags = nla_get_be16(data[IFLA_IPTUN_FLAGS]); |
32b8a8e5 ND |
1484 | |
1485 | if (data[IFLA_IPTUN_PROTO]) | |
1486 | parms->iph.protocol = nla_get_u8(data[IFLA_IPTUN_PROTO]); | |
1487 | ||
9830ad4c CG |
1488 | if (data[IFLA_IPTUN_FWMARK]) |
1489 | *fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]); | |
f3723416 ND |
1490 | } |
1491 | ||
14909664 TH |
1492 | /* This function returns true when ENCAP attributes are present in the nl msg */ |
1493 | static bool ipip6_netlink_encap_parms(struct nlattr *data[], | |
1494 | struct ip_tunnel_encap *ipencap) | |
1495 | { | |
1496 | bool ret = false; | |
1497 | ||
1498 | memset(ipencap, 0, sizeof(*ipencap)); | |
1499 | ||
1500 | if (!data) | |
1501 | return ret; | |
1502 | ||
1503 | if (data[IFLA_IPTUN_ENCAP_TYPE]) { | |
1504 | ret = true; | |
1505 | ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]); | |
1506 | } | |
1507 | ||
1508 | if (data[IFLA_IPTUN_ENCAP_FLAGS]) { | |
1509 | ret = true; | |
1510 | ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]); | |
1511 | } | |
1512 | ||
1513 | if (data[IFLA_IPTUN_ENCAP_SPORT]) { | |
1514 | ret = true; | |
a409caec | 1515 | ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]); |
14909664 TH |
1516 | } |
1517 | ||
1518 | if (data[IFLA_IPTUN_ENCAP_DPORT]) { | |
1519 | ret = true; | |
a409caec | 1520 | ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]); |
14909664 TH |
1521 | } |
1522 | ||
1523 | return ret; | |
1524 | } | |
1525 | ||
e2f1f072 ND |
1526 | #ifdef CONFIG_IPV6_SIT_6RD |
1527 | /* This function returns true when 6RD attributes are present in the nl msg */ | |
1528 | static bool ipip6_netlink_6rd_parms(struct nlattr *data[], | |
1529 | struct ip_tunnel_6rd *ip6rd) | |
1530 | { | |
1531 | bool ret = false; | |
1532 | memset(ip6rd, 0, sizeof(*ip6rd)); | |
1533 | ||
1534 | if (!data) | |
1535 | return ret; | |
1536 | ||
1537 | if (data[IFLA_IPTUN_6RD_PREFIX]) { | |
1538 | ret = true; | |
67b61f6c | 1539 | ip6rd->prefix = nla_get_in6_addr(data[IFLA_IPTUN_6RD_PREFIX]); |
e2f1f072 ND |
1540 | } |
1541 | ||
1542 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIX]) { | |
1543 | ret = true; | |
1544 | ip6rd->relay_prefix = | |
1545 | nla_get_be32(data[IFLA_IPTUN_6RD_RELAY_PREFIX]); | |
1546 | } | |
1547 | ||
1548 | if (data[IFLA_IPTUN_6RD_PREFIXLEN]) { | |
1549 | ret = true; | |
1550 | ip6rd->prefixlen = nla_get_u16(data[IFLA_IPTUN_6RD_PREFIXLEN]); | |
1551 | } | |
1552 | ||
1553 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) { | |
1554 | ret = true; | |
1555 | ip6rd->relay_prefixlen = | |
1556 | nla_get_u16(data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]); | |
1557 | } | |
1558 | ||
1559 | return ret; | |
1560 | } | |
1561 | #endif | |
1562 | ||
f3723416 | 1563 | static int ipip6_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1564 | struct nlattr *tb[], struct nlattr *data[], |
1565 | struct netlink_ext_ack *extack) | |
f3723416 ND |
1566 | { |
1567 | struct net *net = dev_net(dev); | |
1568 | struct ip_tunnel *nt; | |
14909664 | 1569 | struct ip_tunnel_encap ipencap; |
e2f1f072 ND |
1570 | #ifdef CONFIG_IPV6_SIT_6RD |
1571 | struct ip_tunnel_6rd ip6rd; | |
1572 | #endif | |
1573 | int err; | |
f3723416 ND |
1574 | |
1575 | nt = netdev_priv(dev); | |
14909664 TH |
1576 | |
1577 | if (ipip6_netlink_encap_parms(data, &ipencap)) { | |
1578 | err = ip_tunnel_encap_setup(nt, &ipencap); | |
1579 | if (err < 0) | |
1580 | return err; | |
1581 | } | |
1582 | ||
9830ad4c | 1583 | ipip6_netlink_parms(data, &nt->parms, &nt->fwmark); |
f3723416 ND |
1584 | |
1585 | if (ipip6_tunnel_locate(net, &nt->parms, 0)) | |
1586 | return -EEXIST; | |
1587 | ||
e2f1f072 ND |
1588 | err = ipip6_tunnel_create(dev); |
1589 | if (err < 0) | |
1590 | return err; | |
1591 | ||
95662c22 XL |
1592 | if (tb[IFLA_MTU]) { |
1593 | u32 mtu = nla_get_u32(tb[IFLA_MTU]); | |
1594 | ||
d700aa8b ND |
1595 | if (mtu >= IPV6_MIN_MTU && |
1596 | mtu <= IP6_MAX_MTU - dev->hard_header_len) | |
95662c22 XL |
1597 | dev->mtu = mtu; |
1598 | } | |
1599 | ||
e2f1f072 ND |
1600 | #ifdef CONFIG_IPV6_SIT_6RD |
1601 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) | |
1602 | err = ipip6_tunnel_update_6rd(nt, &ip6rd); | |
1603 | #endif | |
1604 | ||
1605 | return err; | |
f3723416 ND |
1606 | } |
1607 | ||
1608 | static int ipip6_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
1609 | struct nlattr *data[], |
1610 | struct netlink_ext_ack *extack) | |
f3723416 | 1611 | { |
86bd68bf | 1612 | struct ip_tunnel *t = netdev_priv(dev); |
f3723416 | 1613 | struct ip_tunnel_parm p; |
14909664 | 1614 | struct ip_tunnel_encap ipencap; |
86bd68bf | 1615 | struct net *net = t->net; |
f3723416 | 1616 | struct sit_net *sitn = net_generic(net, sit_net_id); |
e2f1f072 ND |
1617 | #ifdef CONFIG_IPV6_SIT_6RD |
1618 | struct ip_tunnel_6rd ip6rd; | |
1619 | #endif | |
9830ad4c | 1620 | __u32 fwmark = t->fwmark; |
14909664 | 1621 | int err; |
f3723416 ND |
1622 | |
1623 | if (dev == sitn->fb_tunnel_dev) | |
1624 | return -EINVAL; | |
1625 | ||
14909664 TH |
1626 | if (ipip6_netlink_encap_parms(data, &ipencap)) { |
1627 | err = ip_tunnel_encap_setup(t, &ipencap); | |
1628 | if (err < 0) | |
1629 | return err; | |
1630 | } | |
1631 | ||
9830ad4c | 1632 | ipip6_netlink_parms(data, &p, &fwmark); |
f3723416 ND |
1633 | |
1634 | if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) || | |
1635 | (!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr)) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | t = ipip6_tunnel_locate(net, &p, 0); | |
1639 | ||
1640 | if (t) { | |
1641 | if (t->dev != dev) | |
1642 | return -EEXIST; | |
1643 | } else | |
1644 | t = netdev_priv(dev); | |
1645 | ||
9830ad4c | 1646 | ipip6_tunnel_update(t, &p, fwmark); |
e2f1f072 ND |
1647 | |
1648 | #ifdef CONFIG_IPV6_SIT_6RD | |
1649 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) | |
1650 | return ipip6_tunnel_update_6rd(t, &ip6rd); | |
1651 | #endif | |
1652 | ||
f3723416 ND |
1653 | return 0; |
1654 | } | |
1655 | ||
e4c94a9c | 1656 | static size_t ipip6_get_size(const struct net_device *dev) |
ba3e3f50 ND |
1657 | { |
1658 | return | |
1659 | /* IFLA_IPTUN_LINK */ | |
1660 | nla_total_size(4) + | |
1661 | /* IFLA_IPTUN_LOCAL */ | |
1662 | nla_total_size(4) + | |
1663 | /* IFLA_IPTUN_REMOTE */ | |
1664 | nla_total_size(4) + | |
1665 | /* IFLA_IPTUN_TTL */ | |
1666 | nla_total_size(1) + | |
1667 | /* IFLA_IPTUN_TOS */ | |
1668 | nla_total_size(1) + | |
a12c9a85 ND |
1669 | /* IFLA_IPTUN_PMTUDISC */ |
1670 | nla_total_size(1) + | |
1671 | /* IFLA_IPTUN_FLAGS */ | |
1672 | nla_total_size(2) + | |
32b8a8e5 ND |
1673 | /* IFLA_IPTUN_PROTO */ |
1674 | nla_total_size(1) + | |
e2f1f072 ND |
1675 | #ifdef CONFIG_IPV6_SIT_6RD |
1676 | /* IFLA_IPTUN_6RD_PREFIX */ | |
1677 | nla_total_size(sizeof(struct in6_addr)) + | |
1678 | /* IFLA_IPTUN_6RD_RELAY_PREFIX */ | |
1679 | nla_total_size(4) + | |
1680 | /* IFLA_IPTUN_6RD_PREFIXLEN */ | |
1681 | nla_total_size(2) + | |
1682 | /* IFLA_IPTUN_6RD_RELAY_PREFIXLEN */ | |
1683 | nla_total_size(2) + | |
1684 | #endif | |
14909664 TH |
1685 | /* IFLA_IPTUN_ENCAP_TYPE */ |
1686 | nla_total_size(2) + | |
1687 | /* IFLA_IPTUN_ENCAP_FLAGS */ | |
1688 | nla_total_size(2) + | |
1689 | /* IFLA_IPTUN_ENCAP_SPORT */ | |
1690 | nla_total_size(2) + | |
1691 | /* IFLA_IPTUN_ENCAP_DPORT */ | |
1692 | nla_total_size(2) + | |
9830ad4c CG |
1693 | /* IFLA_IPTUN_FWMARK */ |
1694 | nla_total_size(4) + | |
ba3e3f50 ND |
1695 | 0; |
1696 | } | |
1697 | ||
e4c94a9c | 1698 | static int ipip6_fill_info(struct sk_buff *skb, const struct net_device *dev) |
ba3e3f50 ND |
1699 | { |
1700 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
1701 | struct ip_tunnel_parm *parm = &tunnel->parms; | |
1702 | ||
1703 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || | |
930345ea JB |
1704 | nla_put_in_addr(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) || |
1705 | nla_put_in_addr(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) || | |
ba3e3f50 | 1706 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) || |
a12c9a85 ND |
1707 | nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) || |
1708 | nla_put_u8(skb, IFLA_IPTUN_PMTUDISC, | |
1709 | !!(parm->iph.frag_off & htons(IP_DF))) || | |
32b8a8e5 | 1710 | nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->iph.protocol) || |
9830ad4c CG |
1711 | nla_put_be16(skb, IFLA_IPTUN_FLAGS, parm->i_flags) || |
1712 | nla_put_u32(skb, IFLA_IPTUN_FWMARK, tunnel->fwmark)) | |
ba3e3f50 | 1713 | goto nla_put_failure; |
e2f1f072 ND |
1714 | |
1715 | #ifdef CONFIG_IPV6_SIT_6RD | |
930345ea JB |
1716 | if (nla_put_in6_addr(skb, IFLA_IPTUN_6RD_PREFIX, |
1717 | &tunnel->ip6rd.prefix) || | |
1718 | nla_put_in_addr(skb, IFLA_IPTUN_6RD_RELAY_PREFIX, | |
1719 | tunnel->ip6rd.relay_prefix) || | |
e2f1f072 ND |
1720 | nla_put_u16(skb, IFLA_IPTUN_6RD_PREFIXLEN, |
1721 | tunnel->ip6rd.prefixlen) || | |
1722 | nla_put_u16(skb, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, | |
1723 | tunnel->ip6rd.relay_prefixlen)) | |
1724 | goto nla_put_failure; | |
1725 | #endif | |
1726 | ||
14909664 TH |
1727 | if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE, |
1728 | tunnel->encap.type) || | |
a409caec | 1729 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT, |
14909664 | 1730 | tunnel->encap.sport) || |
a409caec | 1731 | nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT, |
14909664 TH |
1732 | tunnel->encap.dport) || |
1733 | nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS, | |
e1b2cb65 | 1734 | tunnel->encap.flags)) |
14909664 TH |
1735 | goto nla_put_failure; |
1736 | ||
ba3e3f50 ND |
1737 | return 0; |
1738 | ||
1739 | nla_put_failure: | |
1740 | return -EMSGSIZE; | |
1741 | } | |
1742 | ||
f3723416 ND |
1743 | static const struct nla_policy ipip6_policy[IFLA_IPTUN_MAX + 1] = { |
1744 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, | |
1745 | [IFLA_IPTUN_LOCAL] = { .type = NLA_U32 }, | |
1746 | [IFLA_IPTUN_REMOTE] = { .type = NLA_U32 }, | |
1747 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, | |
1748 | [IFLA_IPTUN_TOS] = { .type = NLA_U8 }, | |
1749 | [IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 }, | |
1750 | [IFLA_IPTUN_FLAGS] = { .type = NLA_U16 }, | |
32b8a8e5 | 1751 | [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, |
e2f1f072 ND |
1752 | #ifdef CONFIG_IPV6_SIT_6RD |
1753 | [IFLA_IPTUN_6RD_PREFIX] = { .len = sizeof(struct in6_addr) }, | |
1754 | [IFLA_IPTUN_6RD_RELAY_PREFIX] = { .type = NLA_U32 }, | |
1755 | [IFLA_IPTUN_6RD_PREFIXLEN] = { .type = NLA_U16 }, | |
1756 | [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 }, | |
1757 | #endif | |
14909664 TH |
1758 | [IFLA_IPTUN_ENCAP_TYPE] = { .type = NLA_U16 }, |
1759 | [IFLA_IPTUN_ENCAP_FLAGS] = { .type = NLA_U16 }, | |
1760 | [IFLA_IPTUN_ENCAP_SPORT] = { .type = NLA_U16 }, | |
1761 | [IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 }, | |
9830ad4c | 1762 | [IFLA_IPTUN_FWMARK] = { .type = NLA_U32 }, |
f3723416 ND |
1763 | }; |
1764 | ||
9434266f WB |
1765 | static void ipip6_dellink(struct net_device *dev, struct list_head *head) |
1766 | { | |
1767 | struct net *net = dev_net(dev); | |
1768 | struct sit_net *sitn = net_generic(net, sit_net_id); | |
1769 | ||
1770 | if (dev != sitn->fb_tunnel_dev) | |
1771 | unregister_netdevice_queue(dev, head); | |
1772 | } | |
1773 | ||
ba3e3f50 ND |
1774 | static struct rtnl_link_ops sit_link_ops __read_mostly = { |
1775 | .kind = "sit", | |
1776 | .maxtype = IFLA_IPTUN_MAX, | |
f3723416 | 1777 | .policy = ipip6_policy, |
ba3e3f50 | 1778 | .priv_size = sizeof(struct ip_tunnel), |
f3723416 | 1779 | .setup = ipip6_tunnel_setup, |
32b8a8e5 | 1780 | .validate = ipip6_validate, |
f3723416 ND |
1781 | .newlink = ipip6_newlink, |
1782 | .changelink = ipip6_changelink, | |
e4c94a9c ND |
1783 | .get_size = ipip6_get_size, |
1784 | .fill_info = ipip6_fill_info, | |
9434266f | 1785 | .dellink = ipip6_dellink, |
1728d4fa | 1786 | .get_link_net = ip_tunnel_get_link_net, |
ba3e3f50 ND |
1787 | }; |
1788 | ||
6dcd814b | 1789 | static struct xfrm_tunnel sit_handler __read_mostly = { |
1da177e4 LT |
1790 | .handler = ipip6_rcv, |
1791 | .err_handler = ipip6_err, | |
c73cb5a2 | 1792 | .priority = 1, |
1da177e4 LT |
1793 | }; |
1794 | ||
32b8a8e5 ND |
1795 | static struct xfrm_tunnel ipip_handler __read_mostly = { |
1796 | .handler = ipip_rcv, | |
1797 | .err_handler = ipip6_err, | |
1798 | .priority = 2, | |
1799 | }; | |
1800 | ||
49dbe7ae SH |
1801 | #if IS_ENABLED(CONFIG_MPLS) |
1802 | static struct xfrm_tunnel mplsip_handler __read_mostly = { | |
1803 | .handler = mplsip_rcv, | |
1804 | .err_handler = ipip6_err, | |
1805 | .priority = 2, | |
1806 | }; | |
1807 | #endif | |
1808 | ||
9434266f WB |
1809 | static void __net_exit sit_destroy_tunnels(struct net *net, |
1810 | struct list_head *head) | |
db44575f | 1811 | { |
9434266f | 1812 | struct sit_net *sitn = net_generic(net, sit_net_id); |
5e6700b3 | 1813 | struct net_device *dev, *aux; |
db44575f AK |
1814 | int prio; |
1815 | ||
5e6700b3 ND |
1816 | for_each_netdev_safe(net, dev, aux) |
1817 | if (dev->rtnl_link_ops == &sit_link_ops) | |
1818 | unregister_netdevice_queue(dev, head); | |
1819 | ||
db44575f AK |
1820 | for (prio = 1; prio < 4; prio++) { |
1821 | int h; | |
e87a8f24 | 1822 | for (h = 0; h < IP6_SIT_HASH_SIZE; h++) { |
753ea8e9 | 1823 | struct ip_tunnel *t; |
62808f91 | 1824 | |
753ea8e9 | 1825 | t = rtnl_dereference(sitn->tunnels[prio][h]); |
53b24b8f | 1826 | while (t) { |
5e6700b3 ND |
1827 | /* If dev is in the same netns, it has already |
1828 | * been added to the list by the previous loop. | |
1829 | */ | |
fc8f999d | 1830 | if (!net_eq(dev_net(t->dev), net)) |
5e6700b3 ND |
1831 | unregister_netdevice_queue(t->dev, |
1832 | head); | |
753ea8e9 | 1833 | t = rtnl_dereference(t->next); |
62808f91 | 1834 | } |
db44575f AK |
1835 | } |
1836 | } | |
1837 | } | |
1838 | ||
2c8c1e72 | 1839 | static int __net_init sit_init_net(struct net *net) |
8190d900 | 1840 | { |
67101172 | 1841 | struct sit_net *sitn = net_generic(net, sit_net_id); |
72b36015 | 1842 | struct ip_tunnel *t; |
8190d900 | 1843 | int err; |
8190d900 | 1844 | |
29182176 PE |
1845 | sitn->tunnels[0] = sitn->tunnels_wc; |
1846 | sitn->tunnels[1] = sitn->tunnels_l; | |
1847 | sitn->tunnels[2] = sitn->tunnels_r; | |
1848 | sitn->tunnels[3] = sitn->tunnels_r_l; | |
1849 | ||
cd3dbc19 | 1850 | sitn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
c835a677 | 1851 | NET_NAME_UNKNOWN, |
cd3dbc19 PE |
1852 | ipip6_tunnel_setup); |
1853 | if (!sitn->fb_tunnel_dev) { | |
1854 | err = -ENOMEM; | |
1855 | goto err_alloc_dev; | |
1856 | } | |
be77e593 | 1857 | dev_net_set(sitn->fb_tunnel_dev, net); |
205983c4 | 1858 | sitn->fb_tunnel_dev->rtnl_link_ops = &sit_link_ops; |
5e6700b3 ND |
1859 | /* FB netdevice is special: we have one, and only one per netns. |
1860 | * Allowing to move it to another netns is clearly unsafe. | |
1861 | */ | |
1862 | sitn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL; | |
cd3dbc19 | 1863 | |
e5d08d71 IM |
1864 | err = register_netdev(sitn->fb_tunnel_dev); |
1865 | if (err) | |
cd3dbc19 PE |
1866 | goto err_reg_dev; |
1867 | ||
4ece9009 ED |
1868 | ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn); |
1869 | ipip6_fb_tunnel_init(sitn->fb_tunnel_dev); | |
1870 | ||
72b36015 TF |
1871 | t = netdev_priv(sitn->fb_tunnel_dev); |
1872 | ||
1873 | strcpy(t->parms.name, sitn->fb_tunnel_dev->name); | |
8190d900 PE |
1874 | return 0; |
1875 | ||
cd3dbc19 | 1876 | err_reg_dev: |
dd4080ee | 1877 | ipip6_dev_free(sitn->fb_tunnel_dev); |
8c691459 | 1878 | free_netdev(sitn->fb_tunnel_dev); |
cd3dbc19 | 1879 | err_alloc_dev: |
8190d900 PE |
1880 | return err; |
1881 | } | |
1882 | ||
bb401cae | 1883 | static void __net_exit sit_exit_batch_net(struct list_head *net_list) |
8190d900 | 1884 | { |
62808f91 | 1885 | LIST_HEAD(list); |
bb401cae | 1886 | struct net *net; |
8190d900 | 1887 | |
cd3dbc19 | 1888 | rtnl_lock(); |
bb401cae ED |
1889 | list_for_each_entry(net, net_list, exit_list) |
1890 | sit_destroy_tunnels(net, &list); | |
1891 | ||
62808f91 | 1892 | unregister_netdevice_many(&list); |
cd3dbc19 | 1893 | rtnl_unlock(); |
8190d900 PE |
1894 | } |
1895 | ||
1896 | static struct pernet_operations sit_net_ops = { | |
1897 | .init = sit_init_net, | |
bb401cae | 1898 | .exit_batch = sit_exit_batch_net, |
67101172 EB |
1899 | .id = &sit_net_id, |
1900 | .size = sizeof(struct sit_net), | |
8190d900 PE |
1901 | }; |
1902 | ||
89c89458 | 1903 | static void __exit sit_cleanup(void) |
1da177e4 | 1904 | { |
ba3e3f50 | 1905 | rtnl_link_unregister(&sit_link_ops); |
c73cb5a2 | 1906 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
32b8a8e5 | 1907 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
49dbe7ae SH |
1908 | #if IS_ENABLED(CONFIG_MPLS) |
1909 | xfrm4_tunnel_deregister(&mplsip_handler, AF_MPLS); | |
1910 | #endif | |
db44575f | 1911 | |
67101172 | 1912 | unregister_pernet_device(&sit_net_ops); |
ef9a9d11 | 1913 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1da177e4 LT |
1914 | } |
1915 | ||
89c89458 | 1916 | static int __init sit_init(void) |
1da177e4 LT |
1917 | { |
1918 | int err; | |
1919 | ||
49dbe7ae | 1920 | pr_info("IPv6, IPv4 and MPLS over IPv4 tunneling driver\n"); |
1da177e4 | 1921 | |
67101172 | 1922 | err = register_pernet_device(&sit_net_ops); |
8190d900 | 1923 | if (err < 0) |
d5aa407f AD |
1924 | return err; |
1925 | err = xfrm4_tunnel_register(&sit_handler, AF_INET6); | |
1926 | if (err < 0) { | |
32b8a8e5 | 1927 | pr_info("%s: can't register ip6ip4\n", __func__); |
ba3e3f50 | 1928 | goto xfrm_tunnel_failed; |
d5aa407f | 1929 | } |
32b8a8e5 ND |
1930 | err = xfrm4_tunnel_register(&ipip_handler, AF_INET); |
1931 | if (err < 0) { | |
1932 | pr_info("%s: can't register ip4ip4\n", __func__); | |
1933 | goto xfrm_tunnel4_failed; | |
1934 | } | |
49dbe7ae SH |
1935 | #if IS_ENABLED(CONFIG_MPLS) |
1936 | err = xfrm4_tunnel_register(&mplsip_handler, AF_MPLS); | |
1937 | if (err < 0) { | |
1938 | pr_info("%s: can't register mplsip\n", __func__); | |
1939 | goto xfrm_tunnel_mpls_failed; | |
1940 | } | |
1941 | #endif | |
ba3e3f50 ND |
1942 | err = rtnl_link_register(&sit_link_ops); |
1943 | if (err < 0) | |
1944 | goto rtnl_link_failed; | |
1945 | ||
1946 | out: | |
1da177e4 | 1947 | return err; |
ba3e3f50 ND |
1948 | |
1949 | rtnl_link_failed: | |
49dbe7ae SH |
1950 | #if IS_ENABLED(CONFIG_MPLS) |
1951 | xfrm4_tunnel_deregister(&mplsip_handler, AF_MPLS); | |
1952 | xfrm_tunnel_mpls_failed: | |
1953 | #endif | |
32b8a8e5 ND |
1954 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
1955 | xfrm_tunnel4_failed: | |
ba3e3f50 ND |
1956 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
1957 | xfrm_tunnel_failed: | |
1958 | unregister_pernet_device(&sit_net_ops); | |
1959 | goto out; | |
1da177e4 | 1960 | } |
989e5b96 JR |
1961 | |
1962 | module_init(sit_init); | |
1963 | module_exit(sit_cleanup); | |
39c85086 | 1964 | MODULE_LICENSE("GPL"); |
f98f89a0 | 1965 | MODULE_ALIAS_RTNL_LINK("sit"); |
8909c9ad | 1966 | MODULE_ALIAS_NETDEV("sit0"); |