xref: /openbmc/linux/net/sched/act_tunnel_key.c (revision 176f011b)
1 /*
2  * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
3  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  */
10 
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 
21 #include <linux/tc_act/tc_tunnel_key.h>
22 #include <net/tc_act/tc_tunnel_key.h>
23 
24 static unsigned int tunnel_key_net_id;
25 static struct tc_action_ops act_tunnel_key_ops;
26 
27 static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
28 			  struct tcf_result *res)
29 {
30 	struct tcf_tunnel_key *t = to_tunnel_key(a);
31 	struct tcf_tunnel_key_params *params;
32 	int action;
33 
34 	params = rcu_dereference_bh(t->params);
35 
36 	tcf_lastuse_update(&t->tcf_tm);
37 	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
38 	action = READ_ONCE(t->tcf_action);
39 
40 	switch (params->tcft_action) {
41 	case TCA_TUNNEL_KEY_ACT_RELEASE:
42 		skb_dst_drop(skb);
43 		break;
44 	case TCA_TUNNEL_KEY_ACT_SET:
45 		skb_dst_drop(skb);
46 		skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
47 		break;
48 	default:
49 		WARN_ONCE(1, "Bad tunnel_key action %d.\n",
50 			  params->tcft_action);
51 		break;
52 	}
53 
54 	return action;
55 }
56 
57 static const struct nla_policy
58 enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
59 	[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE]	= { .type = NLA_NESTED },
60 };
61 
62 static const struct nla_policy
63 geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
64 	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]	   = { .type = NLA_U16 },
65 	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]	   = { .type = NLA_U8 },
66 	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]	   = { .type = NLA_BINARY,
67 						       .len = 128 },
68 };
69 
70 static int
71 tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
72 			   struct netlink_ext_ack *extack)
73 {
74 	struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
75 	int err, data_len, opt_len;
76 	u8 *data;
77 
78 	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
79 			       nla, geneve_opt_policy, extack);
80 	if (err < 0)
81 		return err;
82 
83 	if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
84 	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
85 	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
86 		NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
87 		return -EINVAL;
88 	}
89 
90 	data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
91 	data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
92 	if (data_len < 4) {
93 		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
94 		return -ERANGE;
95 	}
96 	if (data_len % 4) {
97 		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
98 		return -ERANGE;
99 	}
100 
101 	opt_len = sizeof(struct geneve_opt) + data_len;
102 	if (dst) {
103 		struct geneve_opt *opt = dst;
104 
105 		WARN_ON(dst_len < opt_len);
106 
107 		opt->opt_class =
108 			nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
109 		opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
110 		opt->length = data_len / 4; /* length is in units of 4 bytes */
111 		opt->r1 = 0;
112 		opt->r2 = 0;
113 		opt->r3 = 0;
114 
115 		memcpy(opt + 1, data, data_len);
116 	}
117 
118 	return opt_len;
119 }
120 
121 static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
122 				int dst_len, struct netlink_ext_ack *extack)
123 {
124 	int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
125 	const struct nlattr *attr, *head = nla_data(nla);
126 
127 	err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
128 			   enc_opts_policy, extack);
129 	if (err)
130 		return err;
131 
132 	nla_for_each_attr(attr, head, len, rem) {
133 		switch (nla_type(attr)) {
134 		case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
135 			opt_len = tunnel_key_copy_geneve_opt(attr, dst,
136 							     dst_len, extack);
137 			if (opt_len < 0)
138 				return opt_len;
139 			opts_len += opt_len;
140 			if (dst) {
141 				dst_len -= opt_len;
142 				dst += opt_len;
143 			}
144 			break;
145 		}
146 	}
147 
148 	if (!opts_len) {
149 		NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
150 		return -EINVAL;
151 	}
152 
153 	if (rem > 0) {
154 		NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
155 		return -EINVAL;
156 	}
157 
158 	return opts_len;
159 }
160 
161 static int tunnel_key_get_opts_len(struct nlattr *nla,
162 				   struct netlink_ext_ack *extack)
163 {
164 	return tunnel_key_copy_opts(nla, NULL, 0, extack);
165 }
166 
167 static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
168 			       int opts_len, struct netlink_ext_ack *extack)
169 {
170 	info->options_len = opts_len;
171 	switch (nla_type(nla_data(nla))) {
172 	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
173 #if IS_ENABLED(CONFIG_INET)
174 		info->key.tun_flags |= TUNNEL_GENEVE_OPT;
175 		return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
176 					    opts_len, extack);
177 #else
178 		return -EAFNOSUPPORT;
179 #endif
180 	default:
181 		NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
182 		return -EINVAL;
183 	}
184 }
185 
186 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
187 	[TCA_TUNNEL_KEY_PARMS]	    = { .len = sizeof(struct tc_tunnel_key) },
188 	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
189 	[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
190 	[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
191 	[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
192 	[TCA_TUNNEL_KEY_ENC_KEY_ID]   = { .type = NLA_U32 },
193 	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
194 	[TCA_TUNNEL_KEY_NO_CSUM]      = { .type = NLA_U8 },
195 	[TCA_TUNNEL_KEY_ENC_OPTS]     = { .type = NLA_NESTED },
196 	[TCA_TUNNEL_KEY_ENC_TOS]      = { .type = NLA_U8 },
197 	[TCA_TUNNEL_KEY_ENC_TTL]      = { .type = NLA_U8 },
198 };
199 
200 static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
201 {
202 	if (!p)
203 		return;
204 	if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
205 		dst_release(&p->tcft_enc_metadata->dst);
206 	kfree_rcu(p, rcu);
207 }
208 
209 static int tunnel_key_init(struct net *net, struct nlattr *nla,
210 			   struct nlattr *est, struct tc_action **a,
211 			   int ovr, int bind, bool rtnl_held,
212 			   struct netlink_ext_ack *extack)
213 {
214 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
215 	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
216 	struct tcf_tunnel_key_params *params_new;
217 	struct metadata_dst *metadata = NULL;
218 	struct tc_tunnel_key *parm;
219 	struct tcf_tunnel_key *t;
220 	bool exists = false;
221 	__be16 dst_port = 0;
222 	__be64 key_id = 0;
223 	int opts_len = 0;
224 	__be16 flags = 0;
225 	u8 tos, ttl;
226 	int ret = 0;
227 	int err;
228 
229 	if (!nla) {
230 		NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
231 		return -EINVAL;
232 	}
233 
234 	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
235 			       extack);
236 	if (err < 0) {
237 		NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
238 		return err;
239 	}
240 
241 	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
242 		NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
243 		return -EINVAL;
244 	}
245 
246 	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
247 	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
248 	if (err < 0)
249 		return err;
250 	exists = err;
251 	if (exists && bind)
252 		return 0;
253 
254 	switch (parm->t_action) {
255 	case TCA_TUNNEL_KEY_ACT_RELEASE:
256 		break;
257 	case TCA_TUNNEL_KEY_ACT_SET:
258 		if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
259 			__be32 key32;
260 
261 			key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
262 			key_id = key32_to_tunnel_id(key32);
263 			flags = TUNNEL_KEY;
264 		}
265 
266 		flags |= TUNNEL_CSUM;
267 		if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
268 		    nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
269 			flags &= ~TUNNEL_CSUM;
270 
271 		if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
272 			dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
273 
274 		if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
275 			opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
276 							   extack);
277 			if (opts_len < 0) {
278 				ret = opts_len;
279 				goto err_out;
280 			}
281 		}
282 
283 		tos = 0;
284 		if (tb[TCA_TUNNEL_KEY_ENC_TOS])
285 			tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
286 		ttl = 0;
287 		if (tb[TCA_TUNNEL_KEY_ENC_TTL])
288 			ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
289 
290 		if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
291 		    tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
292 			__be32 saddr;
293 			__be32 daddr;
294 
295 			saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
296 			daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
297 
298 			metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
299 						    dst_port, flags,
300 						    key_id, opts_len);
301 		} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
302 			   tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
303 			struct in6_addr saddr;
304 			struct in6_addr daddr;
305 
306 			saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
307 			daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
308 
309 			metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
310 						      0, flags,
311 						      key_id, 0);
312 		} else {
313 			NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
314 			ret = -EINVAL;
315 			goto err_out;
316 		}
317 
318 		if (!metadata) {
319 			NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
320 			ret = -ENOMEM;
321 			goto err_out;
322 		}
323 
324 		if (opts_len) {
325 			ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
326 						  &metadata->u.tun_info,
327 						  opts_len, extack);
328 			if (ret < 0)
329 				goto release_tun_meta;
330 		}
331 
332 		metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
333 		break;
334 	default:
335 		NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
336 		ret = -EINVAL;
337 		goto err_out;
338 	}
339 
340 	if (!exists) {
341 		ret = tcf_idr_create(tn, parm->index, est, a,
342 				     &act_tunnel_key_ops, bind, true);
343 		if (ret) {
344 			NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
345 			goto release_tun_meta;
346 		}
347 
348 		ret = ACT_P_CREATED;
349 	} else if (!ovr) {
350 		NL_SET_ERR_MSG(extack, "TC IDR already exists");
351 		ret = -EEXIST;
352 		goto release_tun_meta;
353 	}
354 
355 	t = to_tunnel_key(*a);
356 
357 	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
358 	if (unlikely(!params_new)) {
359 		NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
360 		ret = -ENOMEM;
361 		exists = true;
362 		goto release_tun_meta;
363 	}
364 	params_new->tcft_action = parm->t_action;
365 	params_new->tcft_enc_metadata = metadata;
366 
367 	spin_lock_bh(&t->tcf_lock);
368 	t->tcf_action = parm->action;
369 	rcu_swap_protected(t->params, params_new,
370 			   lockdep_is_held(&t->tcf_lock));
371 	spin_unlock_bh(&t->tcf_lock);
372 	tunnel_key_release_params(params_new);
373 
374 	if (ret == ACT_P_CREATED)
375 		tcf_idr_insert(tn, *a);
376 
377 	return ret;
378 
379 release_tun_meta:
380 	dst_release(&metadata->dst);
381 
382 err_out:
383 	if (exists)
384 		tcf_idr_release(*a, bind);
385 	else
386 		tcf_idr_cleanup(tn, parm->index);
387 	return ret;
388 }
389 
390 static void tunnel_key_release(struct tc_action *a)
391 {
392 	struct tcf_tunnel_key *t = to_tunnel_key(a);
393 	struct tcf_tunnel_key_params *params;
394 
395 	params = rcu_dereference_protected(t->params, 1);
396 	tunnel_key_release_params(params);
397 }
398 
399 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
400 				       const struct ip_tunnel_info *info)
401 {
402 	int len = info->options_len;
403 	u8 *src = (u8 *)(info + 1);
404 	struct nlattr *start;
405 
406 	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
407 	if (!start)
408 		return -EMSGSIZE;
409 
410 	while (len > 0) {
411 		struct geneve_opt *opt = (struct geneve_opt *)src;
412 
413 		if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
414 				 opt->opt_class) ||
415 		    nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
416 			       opt->type) ||
417 		    nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
418 			    opt->length * 4, opt + 1)) {
419 			nla_nest_cancel(skb, start);
420 			return -EMSGSIZE;
421 		}
422 
423 		len -= sizeof(struct geneve_opt) + opt->length * 4;
424 		src += sizeof(struct geneve_opt) + opt->length * 4;
425 	}
426 
427 	nla_nest_end(skb, start);
428 	return 0;
429 }
430 
431 static int tunnel_key_opts_dump(struct sk_buff *skb,
432 				const struct ip_tunnel_info *info)
433 {
434 	struct nlattr *start;
435 	int err = -EINVAL;
436 
437 	if (!info->options_len)
438 		return 0;
439 
440 	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
441 	if (!start)
442 		return -EMSGSIZE;
443 
444 	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
445 		err = tunnel_key_geneve_opts_dump(skb, info);
446 		if (err)
447 			goto err_out;
448 	} else {
449 err_out:
450 		nla_nest_cancel(skb, start);
451 		return err;
452 	}
453 
454 	nla_nest_end(skb, start);
455 	return 0;
456 }
457 
458 static int tunnel_key_dump_addresses(struct sk_buff *skb,
459 				     const struct ip_tunnel_info *info)
460 {
461 	unsigned short family = ip_tunnel_info_af(info);
462 
463 	if (family == AF_INET) {
464 		__be32 saddr = info->key.u.ipv4.src;
465 		__be32 daddr = info->key.u.ipv4.dst;
466 
467 		if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
468 		    !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
469 			return 0;
470 	}
471 
472 	if (family == AF_INET6) {
473 		const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
474 		const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
475 
476 		if (!nla_put_in6_addr(skb,
477 				      TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
478 		    !nla_put_in6_addr(skb,
479 				      TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
480 			return 0;
481 	}
482 
483 	return -EINVAL;
484 }
485 
486 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
487 			   int bind, int ref)
488 {
489 	unsigned char *b = skb_tail_pointer(skb);
490 	struct tcf_tunnel_key *t = to_tunnel_key(a);
491 	struct tcf_tunnel_key_params *params;
492 	struct tc_tunnel_key opt = {
493 		.index    = t->tcf_index,
494 		.refcnt   = refcount_read(&t->tcf_refcnt) - ref,
495 		.bindcnt  = atomic_read(&t->tcf_bindcnt) - bind,
496 	};
497 	struct tcf_t tm;
498 
499 	spin_lock_bh(&t->tcf_lock);
500 	params = rcu_dereference_protected(t->params,
501 					   lockdep_is_held(&t->tcf_lock));
502 	opt.action   = t->tcf_action;
503 	opt.t_action = params->tcft_action;
504 
505 	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
506 		goto nla_put_failure;
507 
508 	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
509 		struct ip_tunnel_info *info =
510 			&params->tcft_enc_metadata->u.tun_info;
511 		struct ip_tunnel_key *key = &info->key;
512 		__be32 key_id = tunnel_id_to_key32(key->tun_id);
513 
514 		if (((key->tun_flags & TUNNEL_KEY) &&
515 		     nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
516 		    tunnel_key_dump_addresses(skb,
517 					      &params->tcft_enc_metadata->u.tun_info) ||
518 		    (key->tp_dst &&
519 		      nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
520 				   key->tp_dst)) ||
521 		    nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
522 			       !(key->tun_flags & TUNNEL_CSUM)) ||
523 		    tunnel_key_opts_dump(skb, info))
524 			goto nla_put_failure;
525 
526 		if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
527 			goto nla_put_failure;
528 
529 		if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
530 			goto nla_put_failure;
531 	}
532 
533 	tcf_tm_dump(&tm, &t->tcf_tm);
534 	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
535 			  &tm, TCA_TUNNEL_KEY_PAD))
536 		goto nla_put_failure;
537 	spin_unlock_bh(&t->tcf_lock);
538 
539 	return skb->len;
540 
541 nla_put_failure:
542 	spin_unlock_bh(&t->tcf_lock);
543 	nlmsg_trim(skb, b);
544 	return -1;
545 }
546 
547 static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
548 			     struct netlink_callback *cb, int type,
549 			     const struct tc_action_ops *ops,
550 			     struct netlink_ext_ack *extack)
551 {
552 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
553 
554 	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
555 }
556 
557 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
558 {
559 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
560 
561 	return tcf_idr_search(tn, a, index);
562 }
563 
564 static struct tc_action_ops act_tunnel_key_ops = {
565 	.kind		=	"tunnel_key",
566 	.type		=	TCA_ACT_TUNNEL_KEY,
567 	.owner		=	THIS_MODULE,
568 	.act		=	tunnel_key_act,
569 	.dump		=	tunnel_key_dump,
570 	.init		=	tunnel_key_init,
571 	.cleanup	=	tunnel_key_release,
572 	.walk		=	tunnel_key_walker,
573 	.lookup		=	tunnel_key_search,
574 	.size		=	sizeof(struct tcf_tunnel_key),
575 };
576 
577 static __net_init int tunnel_key_init_net(struct net *net)
578 {
579 	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
580 
581 	return tc_action_net_init(tn, &act_tunnel_key_ops);
582 }
583 
584 static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
585 {
586 	tc_action_net_exit(net_list, tunnel_key_net_id);
587 }
588 
589 static struct pernet_operations tunnel_key_net_ops = {
590 	.init = tunnel_key_init_net,
591 	.exit_batch = tunnel_key_exit_net,
592 	.id   = &tunnel_key_net_id,
593 	.size = sizeof(struct tc_action_net),
594 };
595 
596 static int __init tunnel_key_init_module(void)
597 {
598 	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
599 }
600 
601 static void __exit tunnel_key_cleanup_module(void)
602 {
603 	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
604 }
605 
606 module_init(tunnel_key_init_module);
607 module_exit(tunnel_key_cleanup_module);
608 
609 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
610 MODULE_DESCRIPTION("ip tunnel manipulation actions");
611 MODULE_LICENSE("GPL v2");
612