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11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/skbuff.h>
15#include <linux/rtnetlink.h>
16#include <net/geneve.h>
17#include <net/netlink.h>
18#include <net/pkt_sched.h>
19#include <net/dst.h>
20#include <net/pkt_cls.h>
21
22#include <linux/tc_act/tc_tunnel_key.h>
23#include <net/tc_act/tc_tunnel_key.h>
24
25static unsigned int tunnel_key_net_id;
26static struct tc_action_ops act_tunnel_key_ops;
27
28static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
29 struct tcf_result *res)
30{
31 struct tcf_tunnel_key *t = to_tunnel_key(a);
32 struct tcf_tunnel_key_params *params;
33 int action;
34
35 params = rcu_dereference_bh(t->params);
36
37 tcf_lastuse_update(&t->tcf_tm);
38 bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
39 action = READ_ONCE(t->tcf_action);
40
41 switch (params->tcft_action) {
42 case TCA_TUNNEL_KEY_ACT_RELEASE:
43 skb_dst_drop(skb);
44 break;
45 case TCA_TUNNEL_KEY_ACT_SET:
46 skb_dst_drop(skb);
47 skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst));
48 break;
49 default:
50 WARN_ONCE(1, "Bad tunnel_key action %d.\n",
51 params->tcft_action);
52 break;
53 }
54
55 return action;
56}
57
58static const struct nla_policy
59enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
60 [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
61};
62
63static const struct nla_policy
64geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
65 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
66 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
67 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
68 .len = 128 },
69};
70
71static int
72tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
73 struct netlink_ext_ack *extack)
74{
75 struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
76 int err, data_len, opt_len;
77 u8 *data;
78
79 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
80 nla, geneve_opt_policy, extack);
81 if (err < 0)
82 return err;
83
84 if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
85 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
86 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
87 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
88 return -EINVAL;
89 }
90
91 data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
92 data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
93 if (data_len < 4) {
94 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
95 return -ERANGE;
96 }
97 if (data_len % 4) {
98 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
99 return -ERANGE;
100 }
101
102 opt_len = sizeof(struct geneve_opt) + data_len;
103 if (dst) {
104 struct geneve_opt *opt = dst;
105
106 WARN_ON(dst_len < opt_len);
107
108 opt->opt_class =
109 nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
110 opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
111 opt->length = data_len / 4;
112 opt->r1 = 0;
113 opt->r2 = 0;
114 opt->r3 = 0;
115
116 memcpy(opt + 1, data, data_len);
117 }
118
119 return opt_len;
120}
121
122static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
123 int dst_len, struct netlink_ext_ack *extack)
124{
125 int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
126 const struct nlattr *attr, *head = nla_data(nla);
127
128 err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
129 enc_opts_policy, extack);
130 if (err)
131 return err;
132
133 nla_for_each_attr(attr, head, len, rem) {
134 switch (nla_type(attr)) {
135 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
136 opt_len = tunnel_key_copy_geneve_opt(attr, dst,
137 dst_len, extack);
138 if (opt_len < 0)
139 return opt_len;
140 opts_len += opt_len;
141 if (dst) {
142 dst_len -= opt_len;
143 dst += opt_len;
144 }
145 break;
146 }
147 }
148
149 if (!opts_len) {
150 NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
151 return -EINVAL;
152 }
153
154 if (rem > 0) {
155 NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
156 return -EINVAL;
157 }
158
159 return opts_len;
160}
161
162static int tunnel_key_get_opts_len(struct nlattr *nla,
163 struct netlink_ext_ack *extack)
164{
165 return tunnel_key_copy_opts(nla, NULL, 0, extack);
166}
167
168static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
169 int opts_len, struct netlink_ext_ack *extack)
170{
171 info->options_len = opts_len;
172 switch (nla_type(nla_data(nla))) {
173 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
174#if IS_ENABLED(CONFIG_INET)
175 info->key.tun_flags |= TUNNEL_GENEVE_OPT;
176 return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
177 opts_len, extack);
178#else
179 return -EAFNOSUPPORT;
180#endif
181 default:
182 NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
183 return -EINVAL;
184 }
185}
186
187static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
188 [TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
189 [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
190 [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
191 [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
192 [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
193 [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
194 [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
195 [TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
196 [TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED },
197 [TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 },
198 [TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 },
199};
200
201static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
202{
203 if (!p)
204 return;
205 if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
206 dst_release(&p->tcft_enc_metadata->dst);
207
208 kfree_rcu(p, rcu);
209}
210
211static int tunnel_key_init(struct net *net, struct nlattr *nla,
212 struct nlattr *est, struct tc_action **a,
213 int ovr, int bind, bool rtnl_held,
214 struct tcf_proto *tp,
215 struct netlink_ext_ack *extack)
216{
217 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
218 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
219 struct tcf_tunnel_key_params *params_new;
220 struct metadata_dst *metadata = NULL;
221 struct tcf_chain *goto_ch = NULL;
222 struct tc_tunnel_key *parm;
223 struct tcf_tunnel_key *t;
224 bool exists = false;
225 __be16 dst_port = 0;
226 __be64 key_id = 0;
227 int opts_len = 0;
228 __be16 flags = 0;
229 u8 tos, ttl;
230 int ret = 0;
231 int err;
232
233 if (!nla) {
234 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
235 return -EINVAL;
236 }
237
238 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
239 extack);
240 if (err < 0) {
241 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
242 return err;
243 }
244
245 if (!tb[TCA_TUNNEL_KEY_PARMS]) {
246 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
247 return -EINVAL;
248 }
249
250 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
251 err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
252 if (err < 0)
253 return err;
254 exists = err;
255 if (exists && bind)
256 return 0;
257
258 switch (parm->t_action) {
259 case TCA_TUNNEL_KEY_ACT_RELEASE:
260 break;
261 case TCA_TUNNEL_KEY_ACT_SET:
262 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
263 __be32 key32;
264
265 key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
266 key_id = key32_to_tunnel_id(key32);
267 flags = TUNNEL_KEY;
268 }
269
270 flags |= TUNNEL_CSUM;
271 if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
272 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
273 flags &= ~TUNNEL_CSUM;
274
275 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
276 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
277
278 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
279 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
280 extack);
281 if (opts_len < 0) {
282 ret = opts_len;
283 goto err_out;
284 }
285 }
286
287 tos = 0;
288 if (tb[TCA_TUNNEL_KEY_ENC_TOS])
289 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
290 ttl = 0;
291 if (tb[TCA_TUNNEL_KEY_ENC_TTL])
292 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
293
294 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
295 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
296 __be32 saddr;
297 __be32 daddr;
298
299 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
300 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
301
302 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
303 dst_port, flags,
304 key_id, opts_len);
305 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
306 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
307 struct in6_addr saddr;
308 struct in6_addr daddr;
309
310 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
311 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
312
313 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
314 0, flags,
315 key_id, 0);
316 } else {
317 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
318 ret = -EINVAL;
319 goto err_out;
320 }
321
322 if (!metadata) {
323 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
324 ret = -ENOMEM;
325 goto err_out;
326 }
327
328#ifdef CONFIG_DST_CACHE
329 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
330 if (ret)
331 goto release_tun_meta;
332#endif
333
334 if (opts_len) {
335 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
336 &metadata->u.tun_info,
337 opts_len, extack);
338 if (ret < 0)
339 goto release_tun_meta;
340 }
341
342 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
343 break;
344 default:
345 NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
346 ret = -EINVAL;
347 goto err_out;
348 }
349
350 if (!exists) {
351 ret = tcf_idr_create(tn, parm->index, est, a,
352 &act_tunnel_key_ops, bind, true);
353 if (ret) {
354 NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
355 goto release_tun_meta;
356 }
357
358 ret = ACT_P_CREATED;
359 } else if (!ovr) {
360 NL_SET_ERR_MSG(extack, "TC IDR already exists");
361 ret = -EEXIST;
362 goto release_tun_meta;
363 }
364
365 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
366 if (err < 0) {
367 ret = err;
368 exists = true;
369 goto release_tun_meta;
370 }
371 t = to_tunnel_key(*a);
372
373 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
374 if (unlikely(!params_new)) {
375 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
376 ret = -ENOMEM;
377 exists = true;
378 goto put_chain;
379 }
380 params_new->tcft_action = parm->t_action;
381 params_new->tcft_enc_metadata = metadata;
382
383 spin_lock_bh(&t->tcf_lock);
384 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
385 rcu_swap_protected(t->params, params_new,
386 lockdep_is_held(&t->tcf_lock));
387 spin_unlock_bh(&t->tcf_lock);
388 tunnel_key_release_params(params_new);
389 if (goto_ch)
390 tcf_chain_put_by_act(goto_ch);
391
392 if (ret == ACT_P_CREATED)
393 tcf_idr_insert(tn, *a);
394
395 return ret;
396
397put_chain:
398 if (goto_ch)
399 tcf_chain_put_by_act(goto_ch);
400
401release_tun_meta:
402 if (metadata)
403 dst_release(&metadata->dst);
404
405err_out:
406 if (exists)
407 tcf_idr_release(*a, bind);
408 else
409 tcf_idr_cleanup(tn, parm->index);
410 return ret;
411}
412
413static void tunnel_key_release(struct tc_action *a)
414{
415 struct tcf_tunnel_key *t = to_tunnel_key(a);
416 struct tcf_tunnel_key_params *params;
417
418 params = rcu_dereference_protected(t->params, 1);
419 tunnel_key_release_params(params);
420}
421
422static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
423 const struct ip_tunnel_info *info)
424{
425 int len = info->options_len;
426 u8 *src = (u8 *)(info + 1);
427 struct nlattr *start;
428
429 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
430 if (!start)
431 return -EMSGSIZE;
432
433 while (len > 0) {
434 struct geneve_opt *opt = (struct geneve_opt *)src;
435
436 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
437 opt->opt_class) ||
438 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
439 opt->type) ||
440 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
441 opt->length * 4, opt + 1)) {
442 nla_nest_cancel(skb, start);
443 return -EMSGSIZE;
444 }
445
446 len -= sizeof(struct geneve_opt) + opt->length * 4;
447 src += sizeof(struct geneve_opt) + opt->length * 4;
448 }
449
450 nla_nest_end(skb, start);
451 return 0;
452}
453
454static int tunnel_key_opts_dump(struct sk_buff *skb,
455 const struct ip_tunnel_info *info)
456{
457 struct nlattr *start;
458 int err = -EINVAL;
459
460 if (!info->options_len)
461 return 0;
462
463 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
464 if (!start)
465 return -EMSGSIZE;
466
467 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
468 err = tunnel_key_geneve_opts_dump(skb, info);
469 if (err)
470 goto err_out;
471 } else {
472err_out:
473 nla_nest_cancel(skb, start);
474 return err;
475 }
476
477 nla_nest_end(skb, start);
478 return 0;
479}
480
481static int tunnel_key_dump_addresses(struct sk_buff *skb,
482 const struct ip_tunnel_info *info)
483{
484 unsigned short family = ip_tunnel_info_af(info);
485
486 if (family == AF_INET) {
487 __be32 saddr = info->key.u.ipv4.src;
488 __be32 daddr = info->key.u.ipv4.dst;
489
490 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
491 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
492 return 0;
493 }
494
495 if (family == AF_INET6) {
496 const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
497 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
498
499 if (!nla_put_in6_addr(skb,
500 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
501 !nla_put_in6_addr(skb,
502 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
503 return 0;
504 }
505
506 return -EINVAL;
507}
508
509static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
510 int bind, int ref)
511{
512 unsigned char *b = skb_tail_pointer(skb);
513 struct tcf_tunnel_key *t = to_tunnel_key(a);
514 struct tcf_tunnel_key_params *params;
515 struct tc_tunnel_key opt = {
516 .index = t->tcf_index,
517 .refcnt = refcount_read(&t->tcf_refcnt) - ref,
518 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
519 };
520 struct tcf_t tm;
521
522 spin_lock_bh(&t->tcf_lock);
523 params = rcu_dereference_protected(t->params,
524 lockdep_is_held(&t->tcf_lock));
525 opt.action = t->tcf_action;
526 opt.t_action = params->tcft_action;
527
528 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
529 goto nla_put_failure;
530
531 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
532 struct ip_tunnel_info *info =
533 ¶ms->tcft_enc_metadata->u.tun_info;
534 struct ip_tunnel_key *key = &info->key;
535 __be32 key_id = tunnel_id_to_key32(key->tun_id);
536
537 if (((key->tun_flags & TUNNEL_KEY) &&
538 nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
539 tunnel_key_dump_addresses(skb,
540 ¶ms->tcft_enc_metadata->u.tun_info) ||
541 (key->tp_dst &&
542 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
543 key->tp_dst)) ||
544 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
545 !(key->tun_flags & TUNNEL_CSUM)) ||
546 tunnel_key_opts_dump(skb, info))
547 goto nla_put_failure;
548
549 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
550 goto nla_put_failure;
551
552 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
553 goto nla_put_failure;
554 }
555
556 tcf_tm_dump(&tm, &t->tcf_tm);
557 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
558 &tm, TCA_TUNNEL_KEY_PAD))
559 goto nla_put_failure;
560 spin_unlock_bh(&t->tcf_lock);
561
562 return skb->len;
563
564nla_put_failure:
565 spin_unlock_bh(&t->tcf_lock);
566 nlmsg_trim(skb, b);
567 return -1;
568}
569
570static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
571 struct netlink_callback *cb, int type,
572 const struct tc_action_ops *ops,
573 struct netlink_ext_ack *extack)
574{
575 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
576
577 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
578}
579
580static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
581{
582 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
583
584 return tcf_idr_search(tn, a, index);
585}
586
587static struct tc_action_ops act_tunnel_key_ops = {
588 .kind = "tunnel_key",
589 .id = TCA_ID_TUNNEL_KEY,
590 .owner = THIS_MODULE,
591 .act = tunnel_key_act,
592 .dump = tunnel_key_dump,
593 .init = tunnel_key_init,
594 .cleanup = tunnel_key_release,
595 .walk = tunnel_key_walker,
596 .lookup = tunnel_key_search,
597 .size = sizeof(struct tcf_tunnel_key),
598};
599
600static __net_init int tunnel_key_init_net(struct net *net)
601{
602 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
603
604 return tc_action_net_init(tn, &act_tunnel_key_ops);
605}
606
607static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
608{
609 tc_action_net_exit(net_list, tunnel_key_net_id);
610}
611
612static struct pernet_operations tunnel_key_net_ops = {
613 .init = tunnel_key_init_net,
614 .exit_batch = tunnel_key_exit_net,
615 .id = &tunnel_key_net_id,
616 .size = sizeof(struct tc_action_net),
617};
618
619static int __init tunnel_key_init_module(void)
620{
621 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
622}
623
624static void __exit tunnel_key_cleanup_module(void)
625{
626 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
627}
628
629module_init(tunnel_key_init_module);
630module_exit(tunnel_key_cleanup_module);
631
632MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
633MODULE_DESCRIPTION("ip tunnel manipulation actions");
634MODULE_LICENSE("GPL v2");
635
