1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
4 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
5 */
6
7 #include <linux/module.h>
8 #include <linux/init.h>
9 #include <linux/kernel.h>
10 #include <linux/skbuff.h>
11 #include <linux/rtnetlink.h>
12 #include <net/geneve.h>
13 #include <net/netlink.h>
14 #include <net/pkt_sched.h>
15 #include <net/dst.h>
16 #include <net/pkt_cls.h>
17
18 #include <linux/tc_act/tc_tunnel_key.h>
19 #include <net/tc_act/tc_tunnel_key.h>
20
21 static unsigned int tunnel_key_net_id;
22 static struct tc_action_ops act_tunnel_key_ops;
23
tunnel_key_act(struct sk_buff * skb,const struct tc_action * a,struct tcf_result * res)24 static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
25 struct tcf_result *res)
26 {
27 struct tcf_tunnel_key *t = to_tunnel_key(a);
28 struct tcf_tunnel_key_params *params;
29 int action;
30
31 params = rcu_dereference_bh(t->params);
32
33 tcf_lastuse_update(&t->tcf_tm);
34 bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
35 action = READ_ONCE(t->tcf_action);
36
37 switch (params->tcft_action) {
38 case TCA_TUNNEL_KEY_ACT_RELEASE:
39 skb_dst_drop(skb);
40 break;
41 case TCA_TUNNEL_KEY_ACT_SET:
42 skb_dst_drop(skb);
43 skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst));
44 break;
45 default:
46 WARN_ONCE(1, "Bad tunnel_key action %d.\n",
47 params->tcft_action);
48 break;
49 }
50
51 return action;
52 }
53
54 static const struct nla_policy
55 enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
56 [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
57 };
58
59 static const struct nla_policy
60 geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
61 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
62 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
63 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
64 .len = 128 },
65 };
66
67 static int
tunnel_key_copy_geneve_opt(const struct nlattr * nla,void * dst,int dst_len,struct netlink_ext_ack * extack)68 tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
69 struct netlink_ext_ack *extack)
70 {
71 struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
72 int err, data_len, opt_len;
73 u8 *data;
74
75 err = nla_parse_nested_deprecated(tb,
76 TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
77 nla, geneve_opt_policy, extack);
78 if (err < 0)
79 return err;
80
81 if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
82 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
83 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
84 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
85 return -EINVAL;
86 }
87
88 data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
89 data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
90 if (data_len < 4) {
91 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
92 return -ERANGE;
93 }
94 if (data_len % 4) {
95 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
96 return -ERANGE;
97 }
98
99 opt_len = sizeof(struct geneve_opt) + data_len;
100 if (dst) {
101 struct geneve_opt *opt = dst;
102
103 WARN_ON(dst_len < opt_len);
104
105 opt->opt_class =
106 nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
107 opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
108 opt->length = data_len / 4; /* length is in units of 4 bytes */
109 opt->r1 = 0;
110 opt->r2 = 0;
111 opt->r3 = 0;
112
113 memcpy(opt + 1, data, data_len);
114 }
115
116 return opt_len;
117 }
118
tunnel_key_copy_opts(const struct nlattr * nla,u8 * dst,int dst_len,struct netlink_ext_ack * extack)119 static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
120 int dst_len, struct netlink_ext_ack *extack)
121 {
122 int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
123 const struct nlattr *attr, *head = nla_data(nla);
124
125 err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
126 enc_opts_policy, extack);
127 if (err)
128 return err;
129
130 nla_for_each_attr(attr, head, len, rem) {
131 switch (nla_type(attr)) {
132 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
133 opt_len = tunnel_key_copy_geneve_opt(attr, dst,
134 dst_len, extack);
135 if (opt_len < 0)
136 return opt_len;
137 opts_len += opt_len;
138 if (opts_len > IP_TUNNEL_OPTS_MAX) {
139 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
140 return -EINVAL;
141 }
142 if (dst) {
143 dst_len -= opt_len;
144 dst += opt_len;
145 }
146 break;
147 }
148 }
149
150 if (!opts_len) {
151 NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
152 return -EINVAL;
153 }
154
155 if (rem > 0) {
156 NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
157 return -EINVAL;
158 }
159
160 return opts_len;
161 }
162
tunnel_key_get_opts_len(struct nlattr * nla,struct netlink_ext_ack * extack)163 static int tunnel_key_get_opts_len(struct nlattr *nla,
164 struct netlink_ext_ack *extack)
165 {
166 return tunnel_key_copy_opts(nla, NULL, 0, extack);
167 }
168
tunnel_key_opts_set(struct nlattr * nla,struct ip_tunnel_info * info,int opts_len,struct netlink_ext_ack * extack)169 static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
170 int opts_len, struct netlink_ext_ack *extack)
171 {
172 info->options_len = opts_len;
173 switch (nla_type(nla_data(nla))) {
174 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
175 #if IS_ENABLED(CONFIG_INET)
176 info->key.tun_flags |= TUNNEL_GENEVE_OPT;
177 return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
178 opts_len, extack);
179 #else
180 return -EAFNOSUPPORT;
181 #endif
182 default:
183 NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
184 return -EINVAL;
185 }
186 }
187
188 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
189 [TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
190 [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
191 [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
192 [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
193 [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
194 [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
195 [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
196 [TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
197 [TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED },
198 [TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 },
199 [TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 },
200 };
201
tunnel_key_release_params(struct tcf_tunnel_key_params * p)202 static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
203 {
204 if (!p)
205 return;
206 if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
207 dst_release(&p->tcft_enc_metadata->dst);
208
209 kfree_rcu(p, rcu);
210 }
211
tunnel_key_init(struct net * net,struct nlattr * nla,struct nlattr * est,struct tc_action ** a,int ovr,int bind,bool rtnl_held,struct tcf_proto * tp,struct netlink_ext_ack * extack)212 static int tunnel_key_init(struct net *net, struct nlattr *nla,
213 struct nlattr *est, struct tc_action **a,
214 int ovr, int bind, bool rtnl_held,
215 struct tcf_proto *tp,
216 struct netlink_ext_ack *extack)
217 {
218 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
219 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
220 struct tcf_tunnel_key_params *params_new;
221 struct metadata_dst *metadata = NULL;
222 struct tcf_chain *goto_ch = NULL;
223 struct tc_tunnel_key *parm;
224 struct tcf_tunnel_key *t;
225 bool exists = false;
226 __be16 dst_port = 0;
227 __be64 key_id = 0;
228 int opts_len = 0;
229 __be16 flags = 0;
230 u8 tos, ttl;
231 int ret = 0;
232 u32 index;
233 int err;
234
235 if (!nla) {
236 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
237 return -EINVAL;
238 }
239
240 err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla,
241 tunnel_key_policy, extack);
242 if (err < 0) {
243 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
244 return err;
245 }
246
247 if (!tb[TCA_TUNNEL_KEY_PARMS]) {
248 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
249 return -EINVAL;
250 }
251
252 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
253 index = parm->index;
254 err = tcf_idr_check_alloc(tn, &index, a, bind);
255 if (err < 0)
256 return err;
257 exists = err;
258 if (exists && bind)
259 return 0;
260
261 switch (parm->t_action) {
262 case TCA_TUNNEL_KEY_ACT_RELEASE:
263 break;
264 case TCA_TUNNEL_KEY_ACT_SET:
265 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
266 __be32 key32;
267
268 key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
269 key_id = key32_to_tunnel_id(key32);
270 flags = TUNNEL_KEY;
271 }
272
273 flags |= TUNNEL_CSUM;
274 if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
275 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
276 flags &= ~TUNNEL_CSUM;
277
278 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
279 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
280
281 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
282 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
283 extack);
284 if (opts_len < 0) {
285 ret = opts_len;
286 goto err_out;
287 }
288 }
289
290 tos = 0;
291 if (tb[TCA_TUNNEL_KEY_ENC_TOS])
292 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
293 ttl = 0;
294 if (tb[TCA_TUNNEL_KEY_ENC_TTL])
295 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
296
297 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
298 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
299 __be32 saddr;
300 __be32 daddr;
301
302 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
303 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
304
305 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
306 dst_port, flags,
307 key_id, opts_len);
308 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
309 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
310 struct in6_addr saddr;
311 struct in6_addr daddr;
312
313 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
314 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
315
316 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
317 0, flags,
318 key_id, 0);
319 } else {
320 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
321 ret = -EINVAL;
322 goto err_out;
323 }
324
325 if (!metadata) {
326 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
327 ret = -ENOMEM;
328 goto err_out;
329 }
330
331 #ifdef CONFIG_DST_CACHE
332 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
333 if (ret)
334 goto release_tun_meta;
335 #endif
336
337 if (opts_len) {
338 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
339 &metadata->u.tun_info,
340 opts_len, extack);
341 if (ret < 0)
342 goto release_tun_meta;
343 }
344
345 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
346 break;
347 default:
348 NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
349 ret = -EINVAL;
350 goto err_out;
351 }
352
353 if (!exists) {
354 ret = tcf_idr_create(tn, index, est, a,
355 &act_tunnel_key_ops, bind, true);
356 if (ret) {
357 NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
358 goto release_tun_meta;
359 }
360
361 ret = ACT_P_CREATED;
362 } else if (!ovr) {
363 NL_SET_ERR_MSG(extack, "TC IDR already exists");
364 ret = -EEXIST;
365 goto release_tun_meta;
366 }
367
368 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
369 if (err < 0) {
370 ret = err;
371 exists = true;
372 goto release_tun_meta;
373 }
374 t = to_tunnel_key(*a);
375
376 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
377 if (unlikely(!params_new)) {
378 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
379 ret = -ENOMEM;
380 exists = true;
381 goto put_chain;
382 }
383 params_new->tcft_action = parm->t_action;
384 params_new->tcft_enc_metadata = metadata;
385
386 spin_lock_bh(&t->tcf_lock);
387 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
388 rcu_swap_protected(t->params, params_new,
389 lockdep_is_held(&t->tcf_lock));
390 spin_unlock_bh(&t->tcf_lock);
391 tunnel_key_release_params(params_new);
392 if (goto_ch)
393 tcf_chain_put_by_act(goto_ch);
394
395 if (ret == ACT_P_CREATED)
396 tcf_idr_insert(tn, *a);
397
398 return ret;
399
400 put_chain:
401 if (goto_ch)
402 tcf_chain_put_by_act(goto_ch);
403
404 release_tun_meta:
405 if (metadata)
406 dst_release(&metadata->dst);
407
408 err_out:
409 if (exists)
410 tcf_idr_release(*a, bind);
411 else
412 tcf_idr_cleanup(tn, index);
413 return ret;
414 }
415
tunnel_key_release(struct tc_action * a)416 static void tunnel_key_release(struct tc_action *a)
417 {
418 struct tcf_tunnel_key *t = to_tunnel_key(a);
419 struct tcf_tunnel_key_params *params;
420
421 params = rcu_dereference_protected(t->params, 1);
422 tunnel_key_release_params(params);
423 }
424
tunnel_key_geneve_opts_dump(struct sk_buff * skb,const struct ip_tunnel_info * info)425 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
426 const struct ip_tunnel_info *info)
427 {
428 int len = info->options_len;
429 u8 *src = (u8 *)(info + 1);
430 struct nlattr *start;
431
432 start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
433 if (!start)
434 return -EMSGSIZE;
435
436 while (len > 0) {
437 struct geneve_opt *opt = (struct geneve_opt *)src;
438
439 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
440 opt->opt_class) ||
441 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
442 opt->type) ||
443 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
444 opt->length * 4, opt + 1)) {
445 nla_nest_cancel(skb, start);
446 return -EMSGSIZE;
447 }
448
449 len -= sizeof(struct geneve_opt) + opt->length * 4;
450 src += sizeof(struct geneve_opt) + opt->length * 4;
451 }
452
453 nla_nest_end(skb, start);
454 return 0;
455 }
456
tunnel_key_opts_dump(struct sk_buff * skb,const struct ip_tunnel_info * info)457 static int tunnel_key_opts_dump(struct sk_buff *skb,
458 const struct ip_tunnel_info *info)
459 {
460 struct nlattr *start;
461 int err = -EINVAL;
462
463 if (!info->options_len)
464 return 0;
465
466 start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS);
467 if (!start)
468 return -EMSGSIZE;
469
470 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
471 err = tunnel_key_geneve_opts_dump(skb, info);
472 if (err)
473 goto err_out;
474 } else {
475 err_out:
476 nla_nest_cancel(skb, start);
477 return err;
478 }
479
480 nla_nest_end(skb, start);
481 return 0;
482 }
483
tunnel_key_dump_addresses(struct sk_buff * skb,const struct ip_tunnel_info * info)484 static int tunnel_key_dump_addresses(struct sk_buff *skb,
485 const struct ip_tunnel_info *info)
486 {
487 unsigned short family = ip_tunnel_info_af(info);
488
489 if (family == AF_INET) {
490 __be32 saddr = info->key.u.ipv4.src;
491 __be32 daddr = info->key.u.ipv4.dst;
492
493 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
494 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
495 return 0;
496 }
497
498 if (family == AF_INET6) {
499 const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
500 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
501
502 if (!nla_put_in6_addr(skb,
503 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
504 !nla_put_in6_addr(skb,
505 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
506 return 0;
507 }
508
509 return -EINVAL;
510 }
511
tunnel_key_dump(struct sk_buff * skb,struct tc_action * a,int bind,int ref)512 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
513 int bind, int ref)
514 {
515 unsigned char *b = skb_tail_pointer(skb);
516 struct tcf_tunnel_key *t = to_tunnel_key(a);
517 struct tcf_tunnel_key_params *params;
518 struct tc_tunnel_key opt = {
519 .index = t->tcf_index,
520 .refcnt = refcount_read(&t->tcf_refcnt) - ref,
521 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
522 };
523 struct tcf_t tm;
524
525 spin_lock_bh(&t->tcf_lock);
526 params = rcu_dereference_protected(t->params,
527 lockdep_is_held(&t->tcf_lock));
528 opt.action = t->tcf_action;
529 opt.t_action = params->tcft_action;
530
531 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
532 goto nla_put_failure;
533
534 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
535 struct ip_tunnel_info *info =
536 ¶ms->tcft_enc_metadata->u.tun_info;
537 struct ip_tunnel_key *key = &info->key;
538 __be32 key_id = tunnel_id_to_key32(key->tun_id);
539
540 if (((key->tun_flags & TUNNEL_KEY) &&
541 nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
542 tunnel_key_dump_addresses(skb,
543 ¶ms->tcft_enc_metadata->u.tun_info) ||
544 (key->tp_dst &&
545 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
546 key->tp_dst)) ||
547 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
548 !(key->tun_flags & TUNNEL_CSUM)) ||
549 tunnel_key_opts_dump(skb, info))
550 goto nla_put_failure;
551
552 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
553 goto nla_put_failure;
554
555 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
556 goto nla_put_failure;
557 }
558
559 tcf_tm_dump(&tm, &t->tcf_tm);
560 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
561 &tm, TCA_TUNNEL_KEY_PAD))
562 goto nla_put_failure;
563 spin_unlock_bh(&t->tcf_lock);
564
565 return skb->len;
566
567 nla_put_failure:
568 spin_unlock_bh(&t->tcf_lock);
569 nlmsg_trim(skb, b);
570 return -1;
571 }
572
tunnel_key_walker(struct net * net,struct sk_buff * skb,struct netlink_callback * cb,int type,const struct tc_action_ops * ops,struct netlink_ext_ack * extack)573 static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
574 struct netlink_callback *cb, int type,
575 const struct tc_action_ops *ops,
576 struct netlink_ext_ack *extack)
577 {
578 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
579
580 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
581 }
582
tunnel_key_search(struct net * net,struct tc_action ** a,u32 index)583 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
584 {
585 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
586
587 return tcf_idr_search(tn, a, index);
588 }
589
590 static struct tc_action_ops act_tunnel_key_ops = {
591 .kind = "tunnel_key",
592 .id = TCA_ID_TUNNEL_KEY,
593 .owner = THIS_MODULE,
594 .act = tunnel_key_act,
595 .dump = tunnel_key_dump,
596 .init = tunnel_key_init,
597 .cleanup = tunnel_key_release,
598 .walk = tunnel_key_walker,
599 .lookup = tunnel_key_search,
600 .size = sizeof(struct tcf_tunnel_key),
601 };
602
tunnel_key_init_net(struct net * net)603 static __net_init int tunnel_key_init_net(struct net *net)
604 {
605 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
606
607 return tc_action_net_init(net, tn, &act_tunnel_key_ops);
608 }
609
tunnel_key_exit_net(struct list_head * net_list)610 static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
611 {
612 tc_action_net_exit(net_list, tunnel_key_net_id);
613 }
614
615 static struct pernet_operations tunnel_key_net_ops = {
616 .init = tunnel_key_init_net,
617 .exit_batch = tunnel_key_exit_net,
618 .id = &tunnel_key_net_id,
619 .size = sizeof(struct tc_action_net),
620 };
621
tunnel_key_init_module(void)622 static int __init tunnel_key_init_module(void)
623 {
624 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
625 }
626
tunnel_key_cleanup_module(void)627 static void __exit tunnel_key_cleanup_module(void)
628 {
629 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
630 }
631
632 module_init(tunnel_key_init_module);
633 module_exit(tunnel_key_cleanup_module);
634
635 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
636 MODULE_DESCRIPTION("ip tunnel manipulation actions");
637 MODULE_LICENSE("GPL v2");
638