Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/sched/cls_api.c Packet classifier API. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * | |
11 | * Changes: | |
12 | * | |
13 | * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support | |
14 | * | |
15 | */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/types.h> | |
19 | #include <linux/kernel.h> | |
1da177e4 | 20 | #include <linux/string.h> |
1da177e4 | 21 | #include <linux/errno.h> |
33a48927 | 22 | #include <linux/err.h> |
1da177e4 | 23 | #include <linux/skbuff.h> |
1da177e4 LT |
24 | #include <linux/init.h> |
25 | #include <linux/kmod.h> | |
ab27cfb8 | 26 | #include <linux/err.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
b854272b DL |
28 | #include <net/net_namespace.h> |
29 | #include <net/sock.h> | |
dc5fc579 | 30 | #include <net/netlink.h> |
1da177e4 LT |
31 | #include <net/pkt_sched.h> |
32 | #include <net/pkt_cls.h> | |
33 | ||
1da177e4 | 34 | /* The list of all installed classifier types */ |
36272874 | 35 | static LIST_HEAD(tcf_proto_base); |
1da177e4 LT |
36 | |
37 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
38 | static DEFINE_RWLOCK(cls_mod_lock); | |
39 | ||
40 | /* Find classifier type by string name */ | |
41 | ||
33a48927 | 42 | static const struct tcf_proto_ops *tcf_proto_lookup_ops(const char *kind) |
1da177e4 | 43 | { |
dcd76081 | 44 | const struct tcf_proto_ops *t, *res = NULL; |
1da177e4 LT |
45 | |
46 | if (kind) { | |
47 | read_lock(&cls_mod_lock); | |
36272874 | 48 | list_for_each_entry(t, &tcf_proto_base, head) { |
33a48927 | 49 | if (strcmp(kind, t->kind) == 0) { |
dcd76081 ED |
50 | if (try_module_get(t->owner)) |
51 | res = t; | |
1da177e4 LT |
52 | break; |
53 | } | |
54 | } | |
55 | read_unlock(&cls_mod_lock); | |
56 | } | |
dcd76081 | 57 | return res; |
1da177e4 LT |
58 | } |
59 | ||
60 | /* Register(unregister) new classifier type */ | |
61 | ||
62 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
63 | { | |
36272874 | 64 | struct tcf_proto_ops *t; |
1da177e4 LT |
65 | int rc = -EEXIST; |
66 | ||
67 | write_lock(&cls_mod_lock); | |
36272874 | 68 | list_for_each_entry(t, &tcf_proto_base, head) |
1da177e4 LT |
69 | if (!strcmp(ops->kind, t->kind)) |
70 | goto out; | |
71 | ||
36272874 | 72 | list_add_tail(&ops->head, &tcf_proto_base); |
1da177e4 LT |
73 | rc = 0; |
74 | out: | |
75 | write_unlock(&cls_mod_lock); | |
76 | return rc; | |
77 | } | |
aa767bfe | 78 | EXPORT_SYMBOL(register_tcf_proto_ops); |
1da177e4 LT |
79 | |
80 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
81 | { | |
36272874 | 82 | struct tcf_proto_ops *t; |
1da177e4 LT |
83 | int rc = -ENOENT; |
84 | ||
c78e1746 DB |
85 | /* Wait for outstanding call_rcu()s, if any, from a |
86 | * tcf_proto_ops's destroy() handler. | |
87 | */ | |
88 | rcu_barrier(); | |
89 | ||
1da177e4 | 90 | write_lock(&cls_mod_lock); |
dcd76081 ED |
91 | list_for_each_entry(t, &tcf_proto_base, head) { |
92 | if (t == ops) { | |
93 | list_del(&t->head); | |
94 | rc = 0; | |
1da177e4 | 95 | break; |
dcd76081 ED |
96 | } |
97 | } | |
1da177e4 LT |
98 | write_unlock(&cls_mod_lock); |
99 | return rc; | |
100 | } | |
aa767bfe | 101 | EXPORT_SYMBOL(unregister_tcf_proto_ops); |
1da177e4 | 102 | |
7316ae88 TG |
103 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
104 | struct nlmsghdr *n, struct tcf_proto *tp, | |
fa59b27c | 105 | unsigned long fh, int event, bool unicast); |
1da177e4 | 106 | |
ea7f8277 DB |
107 | static void tfilter_notify_chain(struct net *net, struct sk_buff *oskb, |
108 | struct nlmsghdr *n, | |
2190d1d0 | 109 | struct tcf_chain *chain, int event) |
ea7f8277 | 110 | { |
ea7f8277 DB |
111 | struct tcf_proto *tp; |
112 | ||
2190d1d0 JP |
113 | for (tp = rtnl_dereference(chain->filter_chain); |
114 | tp; tp = rtnl_dereference(tp->next)) | |
19a8bb28 | 115 | tfilter_notify(net, oskb, n, tp, 0, event, false); |
ea7f8277 | 116 | } |
1da177e4 LT |
117 | |
118 | /* Select new prio value from the range, managed by kernel. */ | |
119 | ||
aa767bfe | 120 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
1da177e4 | 121 | { |
aa767bfe | 122 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
1da177e4 LT |
123 | |
124 | if (tp) | |
cc7ec456 | 125 | first = tp->prio - 1; |
1da177e4 | 126 | |
7961973a | 127 | return TC_H_MAJ(first); |
1da177e4 LT |
128 | } |
129 | ||
33a48927 | 130 | static struct tcf_proto *tcf_proto_create(const char *kind, u32 protocol, |
6529eaba | 131 | u32 prio, u32 parent, struct Qdisc *q, |
5bc17018 | 132 | struct tcf_chain *chain) |
33a48927 JP |
133 | { |
134 | struct tcf_proto *tp; | |
135 | int err; | |
136 | ||
137 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); | |
138 | if (!tp) | |
139 | return ERR_PTR(-ENOBUFS); | |
140 | ||
141 | err = -ENOENT; | |
142 | tp->ops = tcf_proto_lookup_ops(kind); | |
143 | if (!tp->ops) { | |
144 | #ifdef CONFIG_MODULES | |
145 | rtnl_unlock(); | |
146 | request_module("cls_%s", kind); | |
147 | rtnl_lock(); | |
148 | tp->ops = tcf_proto_lookup_ops(kind); | |
149 | /* We dropped the RTNL semaphore in order to perform | |
150 | * the module load. So, even if we succeeded in loading | |
151 | * the module we have to replay the request. We indicate | |
152 | * this using -EAGAIN. | |
153 | */ | |
154 | if (tp->ops) { | |
155 | module_put(tp->ops->owner); | |
156 | err = -EAGAIN; | |
157 | } else { | |
158 | err = -ENOENT; | |
159 | } | |
160 | goto errout; | |
161 | #endif | |
162 | } | |
163 | tp->classify = tp->ops->classify; | |
164 | tp->protocol = protocol; | |
165 | tp->prio = prio; | |
166 | tp->classid = parent; | |
167 | tp->q = q; | |
5bc17018 | 168 | tp->chain = chain; |
33a48927 JP |
169 | |
170 | err = tp->ops->init(tp); | |
171 | if (err) { | |
172 | module_put(tp->ops->owner); | |
173 | goto errout; | |
174 | } | |
175 | return tp; | |
176 | ||
177 | errout: | |
178 | kfree(tp); | |
179 | return ERR_PTR(err); | |
180 | } | |
181 | ||
763dbf63 | 182 | static void tcf_proto_destroy(struct tcf_proto *tp) |
cf1facda | 183 | { |
763dbf63 WC |
184 | tp->ops->destroy(tp); |
185 | module_put(tp->ops->owner); | |
186 | kfree_rcu(tp, rcu); | |
cf1facda JP |
187 | } |
188 | ||
5bc17018 JP |
189 | static struct tcf_chain *tcf_chain_create(struct tcf_block *block, |
190 | u32 chain_index) | |
2190d1d0 | 191 | { |
5bc17018 JP |
192 | struct tcf_chain *chain; |
193 | ||
194 | chain = kzalloc(sizeof(*chain), GFP_KERNEL); | |
195 | if (!chain) | |
196 | return NULL; | |
197 | list_add_tail(&chain->list, &block->chain_list); | |
198 | chain->block = block; | |
199 | chain->index = chain_index; | |
200 | chain->refcnt = 1; | |
201 | return chain; | |
2190d1d0 JP |
202 | } |
203 | ||
f93e1cdc | 204 | static void tcf_chain_flush(struct tcf_chain *chain) |
cf1facda JP |
205 | { |
206 | struct tcf_proto *tp; | |
207 | ||
f93e1cdc JP |
208 | if (*chain->p_filter_chain) |
209 | RCU_INIT_POINTER(*chain->p_filter_chain, NULL); | |
2190d1d0 JP |
210 | while ((tp = rtnl_dereference(chain->filter_chain)) != NULL) { |
211 | RCU_INIT_POINTER(chain->filter_chain, tp->next); | |
763dbf63 | 212 | tcf_proto_destroy(tp); |
cf1facda | 213 | } |
f93e1cdc JP |
214 | } |
215 | ||
216 | static void tcf_chain_destroy(struct tcf_chain *chain) | |
217 | { | |
218 | list_del(&chain->list); | |
219 | tcf_chain_flush(chain); | |
2190d1d0 JP |
220 | kfree(chain); |
221 | } | |
222 | ||
367a8ce8 WC |
223 | struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index, |
224 | bool create) | |
5bc17018 JP |
225 | { |
226 | struct tcf_chain *chain; | |
227 | ||
228 | list_for_each_entry(chain, &block->chain_list, list) { | |
229 | if (chain->index == chain_index) { | |
230 | chain->refcnt++; | |
231 | return chain; | |
232 | } | |
233 | } | |
367a8ce8 WC |
234 | if (create) |
235 | return tcf_chain_create(block, chain_index); | |
236 | else | |
237 | return NULL; | |
5bc17018 JP |
238 | } |
239 | EXPORT_SYMBOL(tcf_chain_get); | |
240 | ||
241 | void tcf_chain_put(struct tcf_chain *chain) | |
242 | { | |
243 | /* Destroy unused chain, with exception of chain 0, which is the | |
244 | * default one and has to be always present. | |
245 | */ | |
246 | if (--chain->refcnt == 0 && !chain->filter_chain && chain->index != 0) | |
247 | tcf_chain_destroy(chain); | |
248 | } | |
249 | EXPORT_SYMBOL(tcf_chain_put); | |
250 | ||
2190d1d0 JP |
251 | static void |
252 | tcf_chain_filter_chain_ptr_set(struct tcf_chain *chain, | |
253 | struct tcf_proto __rcu **p_filter_chain) | |
254 | { | |
255 | chain->p_filter_chain = p_filter_chain; | |
cf1facda | 256 | } |
6529eaba JP |
257 | |
258 | int tcf_block_get(struct tcf_block **p_block, | |
259 | struct tcf_proto __rcu **p_filter_chain) | |
260 | { | |
261 | struct tcf_block *block = kzalloc(sizeof(*block), GFP_KERNEL); | |
5bc17018 | 262 | struct tcf_chain *chain; |
2190d1d0 | 263 | int err; |
6529eaba JP |
264 | |
265 | if (!block) | |
266 | return -ENOMEM; | |
5bc17018 JP |
267 | INIT_LIST_HEAD(&block->chain_list); |
268 | /* Create chain 0 by default, it has to be always present. */ | |
269 | chain = tcf_chain_create(block, 0); | |
270 | if (!chain) { | |
2190d1d0 JP |
271 | err = -ENOMEM; |
272 | goto err_chain_create; | |
273 | } | |
5bc17018 | 274 | tcf_chain_filter_chain_ptr_set(chain, p_filter_chain); |
6529eaba JP |
275 | *p_block = block; |
276 | return 0; | |
2190d1d0 JP |
277 | |
278 | err_chain_create: | |
279 | kfree(block); | |
280 | return err; | |
6529eaba JP |
281 | } |
282 | EXPORT_SYMBOL(tcf_block_get); | |
283 | ||
284 | void tcf_block_put(struct tcf_block *block) | |
285 | { | |
5bc17018 JP |
286 | struct tcf_chain *chain, *tmp; |
287 | ||
6529eaba JP |
288 | if (!block) |
289 | return; | |
5bc17018 JP |
290 | |
291 | list_for_each_entry_safe(chain, tmp, &block->chain_list, list) | |
292 | tcf_chain_destroy(chain); | |
6529eaba JP |
293 | kfree(block); |
294 | } | |
295 | EXPORT_SYMBOL(tcf_block_put); | |
cf1facda | 296 | |
87d83093 JP |
297 | /* Main classifier routine: scans classifier chain attached |
298 | * to this qdisc, (optionally) tests for protocol and asks | |
299 | * specific classifiers. | |
300 | */ | |
301 | int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp, | |
302 | struct tcf_result *res, bool compat_mode) | |
303 | { | |
304 | __be16 protocol = tc_skb_protocol(skb); | |
305 | #ifdef CONFIG_NET_CLS_ACT | |
306 | const int max_reclassify_loop = 4; | |
ee538dce JP |
307 | const struct tcf_proto *orig_tp = tp; |
308 | const struct tcf_proto *first_tp; | |
87d83093 JP |
309 | int limit = 0; |
310 | ||
311 | reclassify: | |
312 | #endif | |
313 | for (; tp; tp = rcu_dereference_bh(tp->next)) { | |
314 | int err; | |
315 | ||
316 | if (tp->protocol != protocol && | |
317 | tp->protocol != htons(ETH_P_ALL)) | |
318 | continue; | |
319 | ||
320 | err = tp->classify(skb, tp, res); | |
321 | #ifdef CONFIG_NET_CLS_ACT | |
db50514f | 322 | if (unlikely(err == TC_ACT_RECLASSIFY && !compat_mode)) { |
ee538dce | 323 | first_tp = orig_tp; |
87d83093 | 324 | goto reset; |
db50514f | 325 | } else if (unlikely(TC_ACT_EXT_CMP(err, TC_ACT_GOTO_CHAIN))) { |
ee538dce | 326 | first_tp = res->goto_tp; |
db50514f JP |
327 | goto reset; |
328 | } | |
87d83093 JP |
329 | #endif |
330 | if (err >= 0) | |
331 | return err; | |
332 | } | |
333 | ||
334 | return TC_ACT_UNSPEC; /* signal: continue lookup */ | |
335 | #ifdef CONFIG_NET_CLS_ACT | |
336 | reset: | |
337 | if (unlikely(limit++ >= max_reclassify_loop)) { | |
338 | net_notice_ratelimited("%s: reclassify loop, rule prio %u, protocol %02x\n", | |
339 | tp->q->ops->id, tp->prio & 0xffff, | |
340 | ntohs(tp->protocol)); | |
341 | return TC_ACT_SHOT; | |
342 | } | |
343 | ||
ee538dce | 344 | tp = first_tp; |
87d83093 JP |
345 | protocol = tc_skb_protocol(skb); |
346 | goto reclassify; | |
347 | #endif | |
348 | } | |
349 | EXPORT_SYMBOL(tcf_classify); | |
350 | ||
2190d1d0 JP |
351 | struct tcf_chain_info { |
352 | struct tcf_proto __rcu **pprev; | |
353 | struct tcf_proto __rcu *next; | |
354 | }; | |
355 | ||
356 | static struct tcf_proto *tcf_chain_tp_prev(struct tcf_chain_info *chain_info) | |
357 | { | |
358 | return rtnl_dereference(*chain_info->pprev); | |
359 | } | |
360 | ||
361 | static void tcf_chain_tp_insert(struct tcf_chain *chain, | |
362 | struct tcf_chain_info *chain_info, | |
363 | struct tcf_proto *tp) | |
364 | { | |
365 | if (chain->p_filter_chain && | |
366 | *chain_info->pprev == chain->filter_chain) | |
31efcc25 | 367 | rcu_assign_pointer(*chain->p_filter_chain, tp); |
2190d1d0 JP |
368 | RCU_INIT_POINTER(tp->next, tcf_chain_tp_prev(chain_info)); |
369 | rcu_assign_pointer(*chain_info->pprev, tp); | |
370 | } | |
371 | ||
372 | static void tcf_chain_tp_remove(struct tcf_chain *chain, | |
373 | struct tcf_chain_info *chain_info, | |
374 | struct tcf_proto *tp) | |
375 | { | |
376 | struct tcf_proto *next = rtnl_dereference(chain_info->next); | |
377 | ||
378 | if (chain->p_filter_chain && tp == chain->filter_chain) | |
31efcc25 | 379 | RCU_INIT_POINTER(*chain->p_filter_chain, next); |
2190d1d0 JP |
380 | RCU_INIT_POINTER(*chain_info->pprev, next); |
381 | } | |
382 | ||
383 | static struct tcf_proto *tcf_chain_tp_find(struct tcf_chain *chain, | |
384 | struct tcf_chain_info *chain_info, | |
385 | u32 protocol, u32 prio, | |
386 | bool prio_allocate) | |
387 | { | |
388 | struct tcf_proto **pprev; | |
389 | struct tcf_proto *tp; | |
390 | ||
391 | /* Check the chain for existence of proto-tcf with this priority */ | |
392 | for (pprev = &chain->filter_chain; | |
393 | (tp = rtnl_dereference(*pprev)); pprev = &tp->next) { | |
394 | if (tp->prio >= prio) { | |
395 | if (tp->prio == prio) { | |
396 | if (prio_allocate || | |
397 | (tp->protocol != protocol && protocol)) | |
398 | return ERR_PTR(-EINVAL); | |
399 | } else { | |
400 | tp = NULL; | |
401 | } | |
402 | break; | |
403 | } | |
404 | } | |
405 | chain_info->pprev = pprev; | |
406 | chain_info->next = tp ? tp->next : NULL; | |
407 | return tp; | |
408 | } | |
409 | ||
1da177e4 LT |
410 | /* Add/change/delete/get a filter node */ |
411 | ||
c21ef3e3 DA |
412 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, |
413 | struct netlink_ext_ack *extack) | |
1da177e4 | 414 | { |
3b1e0a65 | 415 | struct net *net = sock_net(skb->sk); |
add93b61 | 416 | struct nlattr *tca[TCA_MAX + 1]; |
1da177e4 LT |
417 | struct tcmsg *t; |
418 | u32 protocol; | |
419 | u32 prio; | |
9d36d9e5 | 420 | bool prio_allocate; |
1da177e4 | 421 | u32 parent; |
5bc17018 | 422 | u32 chain_index; |
1da177e4 LT |
423 | struct net_device *dev; |
424 | struct Qdisc *q; | |
2190d1d0 | 425 | struct tcf_chain_info chain_info; |
5bc17018 | 426 | struct tcf_chain *chain = NULL; |
6529eaba | 427 | struct tcf_block *block; |
1da177e4 | 428 | struct tcf_proto *tp; |
20fea08b | 429 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
430 | unsigned long cl; |
431 | unsigned long fh; | |
432 | int err; | |
628185cf | 433 | int tp_created; |
1da177e4 | 434 | |
4e8bbb81 | 435 | if ((n->nlmsg_type != RTM_GETTFILTER) && |
5f013c9b | 436 | !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) |
dfc47ef8 | 437 | return -EPERM; |
de179c8c | 438 | |
1da177e4 | 439 | replay: |
628185cf DB |
440 | tp_created = 0; |
441 | ||
c21ef3e3 | 442 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL, extack); |
de179c8c H |
443 | if (err < 0) |
444 | return err; | |
445 | ||
942b8165 | 446 | t = nlmsg_data(n); |
1da177e4 LT |
447 | protocol = TC_H_MIN(t->tcm_info); |
448 | prio = TC_H_MAJ(t->tcm_info); | |
9d36d9e5 | 449 | prio_allocate = false; |
1da177e4 LT |
450 | parent = t->tcm_parent; |
451 | cl = 0; | |
452 | ||
453 | if (prio == 0) { | |
ea7f8277 DB |
454 | switch (n->nlmsg_type) { |
455 | case RTM_DELTFILTER: | |
9f6ed032 | 456 | if (protocol || t->tcm_handle || tca[TCA_KIND]) |
ea7f8277 DB |
457 | return -ENOENT; |
458 | break; | |
459 | case RTM_NEWTFILTER: | |
460 | /* If no priority is provided by the user, | |
461 | * we allocate one. | |
462 | */ | |
463 | if (n->nlmsg_flags & NLM_F_CREATE) { | |
464 | prio = TC_H_MAKE(0x80000000U, 0U); | |
9d36d9e5 | 465 | prio_allocate = true; |
ea7f8277 DB |
466 | break; |
467 | } | |
468 | /* fall-through */ | |
469 | default: | |
1da177e4 | 470 | return -ENOENT; |
ea7f8277 | 471 | } |
1da177e4 LT |
472 | } |
473 | ||
474 | /* Find head of filter chain. */ | |
475 | ||
476 | /* Find link */ | |
7316ae88 | 477 | dev = __dev_get_by_index(net, t->tcm_ifindex); |
aa767bfe | 478 | if (dev == NULL) |
1da177e4 LT |
479 | return -ENODEV; |
480 | ||
481 | /* Find qdisc */ | |
482 | if (!parent) { | |
af356afa | 483 | q = dev->qdisc; |
1da177e4 | 484 | parent = q->handle; |
aa767bfe SH |
485 | } else { |
486 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); | |
487 | if (q == NULL) | |
488 | return -EINVAL; | |
489 | } | |
1da177e4 LT |
490 | |
491 | /* Is it classful? */ | |
cc7ec456 ED |
492 | cops = q->ops->cl_ops; |
493 | if (!cops) | |
1da177e4 LT |
494 | return -EINVAL; |
495 | ||
6529eaba | 496 | if (!cops->tcf_block) |
71ebe5e9 PM |
497 | return -EOPNOTSUPP; |
498 | ||
1da177e4 LT |
499 | /* Do we search for filter, attached to class? */ |
500 | if (TC_H_MIN(parent)) { | |
501 | cl = cops->get(q, parent); | |
502 | if (cl == 0) | |
503 | return -ENOENT; | |
504 | } | |
505 | ||
506 | /* And the last stroke */ | |
6529eaba JP |
507 | block = cops->tcf_block(q, cl); |
508 | if (!block) { | |
6bb16e7a | 509 | err = -EINVAL; |
1da177e4 | 510 | goto errout; |
6bb16e7a | 511 | } |
5bc17018 JP |
512 | |
513 | chain_index = tca[TCA_CHAIN] ? nla_get_u32(tca[TCA_CHAIN]) : 0; | |
514 | if (chain_index > TC_ACT_EXT_VAL_MASK) { | |
515 | err = -EINVAL; | |
516 | goto errout; | |
517 | } | |
367a8ce8 WC |
518 | chain = tcf_chain_get(block, chain_index, |
519 | n->nlmsg_type == RTM_NEWTFILTER); | |
5bc17018 | 520 | if (!chain) { |
367a8ce8 | 521 | err = n->nlmsg_type == RTM_NEWTFILTER ? -ENOMEM : -EINVAL; |
5bc17018 JP |
522 | goto errout; |
523 | } | |
6529eaba | 524 | |
ea7f8277 DB |
525 | if (n->nlmsg_type == RTM_DELTFILTER && prio == 0) { |
526 | tfilter_notify_chain(net, skb, n, chain, RTM_DELTFILTER); | |
f93e1cdc | 527 | tcf_chain_flush(chain); |
ea7f8277 DB |
528 | err = 0; |
529 | goto errout; | |
530 | } | |
1da177e4 | 531 | |
2190d1d0 JP |
532 | tp = tcf_chain_tp_find(chain, &chain_info, protocol, |
533 | prio, prio_allocate); | |
534 | if (IS_ERR(tp)) { | |
535 | err = PTR_ERR(tp); | |
536 | goto errout; | |
1da177e4 LT |
537 | } |
538 | ||
539 | if (tp == NULL) { | |
540 | /* Proto-tcf does not exist, create new one */ | |
541 | ||
6bb16e7a JP |
542 | if (tca[TCA_KIND] == NULL || !protocol) { |
543 | err = -EINVAL; | |
1da177e4 | 544 | goto errout; |
6bb16e7a | 545 | } |
1da177e4 | 546 | |
cc7ec456 | 547 | if (n->nlmsg_type != RTM_NEWTFILTER || |
6bb16e7a JP |
548 | !(n->nlmsg_flags & NLM_F_CREATE)) { |
549 | err = -ENOENT; | |
1da177e4 | 550 | goto errout; |
6bb16e7a | 551 | } |
1da177e4 | 552 | |
9d36d9e5 | 553 | if (prio_allocate) |
2190d1d0 | 554 | prio = tcf_auto_prio(tcf_chain_tp_prev(&chain_info)); |
1da177e4 | 555 | |
33a48927 | 556 | tp = tcf_proto_create(nla_data(tca[TCA_KIND]), |
5bc17018 | 557 | protocol, prio, parent, q, chain); |
33a48927 JP |
558 | if (IS_ERR(tp)) { |
559 | err = PTR_ERR(tp); | |
1da177e4 LT |
560 | goto errout; |
561 | } | |
12186be7 | 562 | tp_created = 1; |
6bb16e7a JP |
563 | } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind)) { |
564 | err = -EINVAL; | |
1da177e4 | 565 | goto errout; |
6bb16e7a | 566 | } |
1da177e4 LT |
567 | |
568 | fh = tp->ops->get(tp, t->tcm_handle); | |
569 | ||
570 | if (fh == 0) { | |
571 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
2190d1d0 | 572 | tcf_chain_tp_remove(chain, &chain_info, tp); |
fa59b27c ED |
573 | tfilter_notify(net, skb, n, tp, fh, |
574 | RTM_DELTFILTER, false); | |
763dbf63 | 575 | tcf_proto_destroy(tp); |
1da177e4 LT |
576 | err = 0; |
577 | goto errout; | |
578 | } | |
579 | ||
aa767bfe | 580 | if (n->nlmsg_type != RTM_NEWTFILTER || |
6bb16e7a JP |
581 | !(n->nlmsg_flags & NLM_F_CREATE)) { |
582 | err = -ENOENT; | |
1da177e4 | 583 | goto errout; |
6bb16e7a | 584 | } |
1da177e4 | 585 | } else { |
763dbf63 WC |
586 | bool last; |
587 | ||
1da177e4 | 588 | switch (n->nlmsg_type) { |
10297b99 | 589 | case RTM_NEWTFILTER: |
12186be7 MU |
590 | if (n->nlmsg_flags & NLM_F_EXCL) { |
591 | if (tp_created) | |
763dbf63 | 592 | tcf_proto_destroy(tp); |
6bb16e7a | 593 | err = -EEXIST; |
1da177e4 | 594 | goto errout; |
12186be7 | 595 | } |
1da177e4 LT |
596 | break; |
597 | case RTM_DELTFILTER: | |
763dbf63 | 598 | err = tp->ops->delete(tp, fh, &last); |
40c81b25 JP |
599 | if (err) |
600 | goto errout; | |
40c81b25 JP |
601 | tfilter_notify(net, skb, n, tp, t->tcm_handle, |
602 | RTM_DELTFILTER, false); | |
763dbf63 | 603 | if (last) { |
2190d1d0 | 604 | tcf_chain_tp_remove(chain, &chain_info, tp); |
763dbf63 WC |
605 | tcf_proto_destroy(tp); |
606 | } | |
d7cf52c2 | 607 | goto errout; |
1da177e4 | 608 | case RTM_GETTFILTER: |
5a7a5555 | 609 | err = tfilter_notify(net, skb, n, tp, fh, |
fa59b27c | 610 | RTM_NEWTFILTER, true); |
1da177e4 LT |
611 | goto errout; |
612 | default: | |
613 | err = -EINVAL; | |
614 | goto errout; | |
615 | } | |
616 | } | |
617 | ||
2f7ef2f8 CW |
618 | err = tp->ops->change(net, skb, tp, cl, t->tcm_handle, tca, &fh, |
619 | n->nlmsg_flags & NLM_F_CREATE ? TCA_ACT_NOREPLACE : TCA_ACT_REPLACE); | |
12186be7 | 620 | if (err == 0) { |
2190d1d0 JP |
621 | if (tp_created) |
622 | tcf_chain_tp_insert(chain, &chain_info, tp); | |
fa59b27c | 623 | tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER, false); |
12186be7 MU |
624 | } else { |
625 | if (tp_created) | |
763dbf63 | 626 | tcf_proto_destroy(tp); |
12186be7 | 627 | } |
1da177e4 LT |
628 | |
629 | errout: | |
5bc17018 JP |
630 | if (chain) |
631 | tcf_chain_put(chain); | |
1da177e4 LT |
632 | if (cl) |
633 | cops->put(q, cl); | |
634 | if (err == -EAGAIN) | |
635 | /* Replay the request. */ | |
636 | goto replay; | |
637 | return err; | |
638 | } | |
639 | ||
0b0f43fe JHS |
640 | static int tcf_fill_node(struct net *net, struct sk_buff *skb, |
641 | struct tcf_proto *tp, unsigned long fh, u32 portid, | |
642 | u32 seq, u16 flags, int event) | |
1da177e4 LT |
643 | { |
644 | struct tcmsg *tcm; | |
645 | struct nlmsghdr *nlh; | |
27a884dc | 646 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 647 | |
15e47304 | 648 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags); |
942b8165 DM |
649 | if (!nlh) |
650 | goto out_nlmsg_trim; | |
651 | tcm = nlmsg_data(nlh); | |
1da177e4 | 652 | tcm->tcm_family = AF_UNSPEC; |
9ef1d4c7 | 653 | tcm->tcm__pad1 = 0; |
ad61df91 | 654 | tcm->tcm__pad2 = 0; |
5ce2d488 | 655 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
1da177e4 LT |
656 | tcm->tcm_parent = tp->classid; |
657 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
1b34ec43 DM |
658 | if (nla_put_string(skb, TCA_KIND, tp->ops->kind)) |
659 | goto nla_put_failure; | |
5bc17018 JP |
660 | if (nla_put_u32(skb, TCA_CHAIN, tp->chain->index)) |
661 | goto nla_put_failure; | |
1da177e4 LT |
662 | tcm->tcm_handle = fh; |
663 | if (RTM_DELTFILTER != event) { | |
664 | tcm->tcm_handle = 0; | |
832d1d5b | 665 | if (tp->ops->dump && tp->ops->dump(net, tp, fh, skb, tcm) < 0) |
add93b61 | 666 | goto nla_put_failure; |
1da177e4 | 667 | } |
27a884dc | 668 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
669 | return skb->len; |
670 | ||
942b8165 | 671 | out_nlmsg_trim: |
add93b61 | 672 | nla_put_failure: |
dc5fc579 | 673 | nlmsg_trim(skb, b); |
1da177e4 LT |
674 | return -1; |
675 | } | |
676 | ||
7316ae88 TG |
677 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
678 | struct nlmsghdr *n, struct tcf_proto *tp, | |
fa59b27c | 679 | unsigned long fh, int event, bool unicast) |
1da177e4 LT |
680 | { |
681 | struct sk_buff *skb; | |
15e47304 | 682 | u32 portid = oskb ? NETLINK_CB(oskb).portid : 0; |
1da177e4 LT |
683 | |
684 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
685 | if (!skb) | |
686 | return -ENOBUFS; | |
687 | ||
30a391a1 RM |
688 | if (tcf_fill_node(net, skb, tp, fh, portid, n->nlmsg_seq, |
689 | n->nlmsg_flags, event) <= 0) { | |
1da177e4 LT |
690 | kfree_skb(skb); |
691 | return -EINVAL; | |
692 | } | |
693 | ||
fa59b27c ED |
694 | if (unicast) |
695 | return netlink_unicast(net->rtnl, skb, portid, MSG_DONTWAIT); | |
696 | ||
15e47304 | 697 | return rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
aa767bfe | 698 | n->nlmsg_flags & NLM_F_ECHO); |
1da177e4 LT |
699 | } |
700 | ||
aa767bfe | 701 | struct tcf_dump_args { |
1da177e4 LT |
702 | struct tcf_walker w; |
703 | struct sk_buff *skb; | |
704 | struct netlink_callback *cb; | |
705 | }; | |
706 | ||
aa767bfe SH |
707 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
708 | struct tcf_walker *arg) | |
1da177e4 | 709 | { |
aa767bfe | 710 | struct tcf_dump_args *a = (void *)arg; |
832d1d5b | 711 | struct net *net = sock_net(a->skb->sk); |
1da177e4 | 712 | |
832d1d5b | 713 | return tcf_fill_node(net, a->skb, tp, n, NETLINK_CB(a->cb->skb).portid, |
5a7a5555 JHS |
714 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, |
715 | RTM_NEWTFILTER); | |
1da177e4 LT |
716 | } |
717 | ||
5bc17018 | 718 | static bool tcf_chain_dump(struct tcf_chain *chain, struct sk_buff *skb, |
acb31fae JP |
719 | struct netlink_callback *cb, |
720 | long index_start, long *p_index) | |
721 | { | |
722 | struct net *net = sock_net(skb->sk); | |
723 | struct tcmsg *tcm = nlmsg_data(cb->nlh); | |
724 | struct tcf_dump_args arg; | |
725 | struct tcf_proto *tp; | |
726 | ||
727 | for (tp = rtnl_dereference(chain->filter_chain); | |
728 | tp; tp = rtnl_dereference(tp->next), (*p_index)++) { | |
729 | if (*p_index < index_start) | |
730 | continue; | |
731 | if (TC_H_MAJ(tcm->tcm_info) && | |
732 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
733 | continue; | |
734 | if (TC_H_MIN(tcm->tcm_info) && | |
735 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
736 | continue; | |
737 | if (*p_index > index_start) | |
738 | memset(&cb->args[1], 0, | |
739 | sizeof(cb->args) - sizeof(cb->args[0])); | |
740 | if (cb->args[1] == 0) { | |
741 | if (tcf_fill_node(net, skb, tp, 0, | |
742 | NETLINK_CB(cb->skb).portid, | |
743 | cb->nlh->nlmsg_seq, NLM_F_MULTI, | |
744 | RTM_NEWTFILTER) <= 0) | |
5bc17018 | 745 | return false; |
acb31fae JP |
746 | |
747 | cb->args[1] = 1; | |
748 | } | |
749 | if (!tp->ops->walk) | |
750 | continue; | |
751 | arg.w.fn = tcf_node_dump; | |
752 | arg.skb = skb; | |
753 | arg.cb = cb; | |
754 | arg.w.stop = 0; | |
755 | arg.w.skip = cb->args[1] - 1; | |
756 | arg.w.count = 0; | |
757 | tp->ops->walk(tp, &arg.w); | |
758 | cb->args[1] = arg.w.count + 1; | |
759 | if (arg.w.stop) | |
5bc17018 | 760 | return false; |
acb31fae | 761 | } |
5bc17018 | 762 | return true; |
acb31fae JP |
763 | } |
764 | ||
bd27a875 | 765 | /* called with RTNL */ |
1da177e4 LT |
766 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) |
767 | { | |
3b1e0a65 | 768 | struct net *net = sock_net(skb->sk); |
5bc17018 | 769 | struct nlattr *tca[TCA_MAX + 1]; |
1da177e4 LT |
770 | struct net_device *dev; |
771 | struct Qdisc *q; | |
6529eaba | 772 | struct tcf_block *block; |
2190d1d0 | 773 | struct tcf_chain *chain; |
942b8165 | 774 | struct tcmsg *tcm = nlmsg_data(cb->nlh); |
1da177e4 | 775 | unsigned long cl = 0; |
20fea08b | 776 | const struct Qdisc_class_ops *cops; |
acb31fae JP |
777 | long index_start; |
778 | long index; | |
5bc17018 | 779 | int err; |
1da177e4 | 780 | |
573ce260 | 781 | if (nlmsg_len(cb->nlh) < sizeof(*tcm)) |
1da177e4 | 782 | return skb->len; |
5bc17018 JP |
783 | |
784 | err = nlmsg_parse(cb->nlh, sizeof(*tcm), tca, TCA_MAX, NULL, NULL); | |
785 | if (err) | |
786 | return err; | |
787 | ||
cc7ec456 ED |
788 | dev = __dev_get_by_index(net, tcm->tcm_ifindex); |
789 | if (!dev) | |
1da177e4 LT |
790 | return skb->len; |
791 | ||
1da177e4 | 792 | if (!tcm->tcm_parent) |
af356afa | 793 | q = dev->qdisc; |
1da177e4 LT |
794 | else |
795 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
796 | if (!q) | |
797 | goto out; | |
cc7ec456 ED |
798 | cops = q->ops->cl_ops; |
799 | if (!cops) | |
1da177e4 | 800 | goto errout; |
6529eaba | 801 | if (!cops->tcf_block) |
71ebe5e9 | 802 | goto errout; |
1da177e4 LT |
803 | if (TC_H_MIN(tcm->tcm_parent)) { |
804 | cl = cops->get(q, tcm->tcm_parent); | |
805 | if (cl == 0) | |
806 | goto errout; | |
807 | } | |
6529eaba JP |
808 | block = cops->tcf_block(q, cl); |
809 | if (!block) | |
1da177e4 LT |
810 | goto errout; |
811 | ||
acb31fae JP |
812 | index_start = cb->args[0]; |
813 | index = 0; | |
5bc17018 JP |
814 | |
815 | list_for_each_entry(chain, &block->chain_list, list) { | |
816 | if (tca[TCA_CHAIN] && | |
817 | nla_get_u32(tca[TCA_CHAIN]) != chain->index) | |
818 | continue; | |
819 | if (!tcf_chain_dump(chain, skb, cb, index_start, &index)) | |
820 | break; | |
821 | } | |
822 | ||
acb31fae | 823 | cb->args[0] = index; |
1da177e4 LT |
824 | |
825 | errout: | |
826 | if (cl) | |
827 | cops->put(q, cl); | |
828 | out: | |
1da177e4 LT |
829 | return skb->len; |
830 | } | |
831 | ||
18d0264f | 832 | void tcf_exts_destroy(struct tcf_exts *exts) |
1da177e4 LT |
833 | { |
834 | #ifdef CONFIG_NET_CLS_ACT | |
22dc13c8 WC |
835 | LIST_HEAD(actions); |
836 | ||
837 | tcf_exts_to_list(exts, &actions); | |
838 | tcf_action_destroy(&actions, TCA_ACT_UNBIND); | |
839 | kfree(exts->actions); | |
840 | exts->nr_actions = 0; | |
1da177e4 LT |
841 | #endif |
842 | } | |
aa767bfe | 843 | EXPORT_SYMBOL(tcf_exts_destroy); |
1da177e4 | 844 | |
c1b52739 | 845 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, struct nlattr **tb, |
5a7a5555 | 846 | struct nlattr *rate_tlv, struct tcf_exts *exts, bool ovr) |
1da177e4 | 847 | { |
1da177e4 LT |
848 | #ifdef CONFIG_NET_CLS_ACT |
849 | { | |
1da177e4 LT |
850 | struct tc_action *act; |
851 | ||
5da57f42 | 852 | if (exts->police && tb[exts->police]) { |
9fb9f251 JP |
853 | act = tcf_action_init_1(net, tp, tb[exts->police], |
854 | rate_tlv, "police", ovr, | |
855 | TCA_ACT_BIND); | |
ab27cfb8 PM |
856 | if (IS_ERR(act)) |
857 | return PTR_ERR(act); | |
1da177e4 | 858 | |
33be6271 | 859 | act->type = exts->type = TCA_OLD_COMPAT; |
22dc13c8 WC |
860 | exts->actions[0] = act; |
861 | exts->nr_actions = 1; | |
5da57f42 | 862 | } else if (exts->action && tb[exts->action]) { |
22dc13c8 WC |
863 | LIST_HEAD(actions); |
864 | int err, i = 0; | |
865 | ||
9fb9f251 JP |
866 | err = tcf_action_init(net, tp, tb[exts->action], |
867 | rate_tlv, NULL, ovr, TCA_ACT_BIND, | |
5a7a5555 | 868 | &actions); |
33be6271 WC |
869 | if (err) |
870 | return err; | |
22dc13c8 WC |
871 | list_for_each_entry(act, &actions, list) |
872 | exts->actions[i++] = act; | |
873 | exts->nr_actions = i; | |
1da177e4 LT |
874 | } |
875 | } | |
1da177e4 | 876 | #else |
5da57f42 WC |
877 | if ((exts->action && tb[exts->action]) || |
878 | (exts->police && tb[exts->police])) | |
1da177e4 LT |
879 | return -EOPNOTSUPP; |
880 | #endif | |
881 | ||
882 | return 0; | |
883 | } | |
aa767bfe | 884 | EXPORT_SYMBOL(tcf_exts_validate); |
1da177e4 | 885 | |
aa767bfe SH |
886 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
887 | struct tcf_exts *src) | |
1da177e4 LT |
888 | { |
889 | #ifdef CONFIG_NET_CLS_ACT | |
22dc13c8 WC |
890 | struct tcf_exts old = *dst; |
891 | ||
a49eb42a | 892 | tcf_tree_lock(tp); |
22dc13c8 WC |
893 | dst->nr_actions = src->nr_actions; |
894 | dst->actions = src->actions; | |
5301e3e1 | 895 | dst->type = src->type; |
a49eb42a | 896 | tcf_tree_unlock(tp); |
22dc13c8 WC |
897 | |
898 | tcf_exts_destroy(&old); | |
1da177e4 LT |
899 | #endif |
900 | } | |
aa767bfe | 901 | EXPORT_SYMBOL(tcf_exts_change); |
1da177e4 | 902 | |
22dc13c8 WC |
903 | #ifdef CONFIG_NET_CLS_ACT |
904 | static struct tc_action *tcf_exts_first_act(struct tcf_exts *exts) | |
905 | { | |
906 | if (exts->nr_actions == 0) | |
907 | return NULL; | |
908 | else | |
909 | return exts->actions[0]; | |
910 | } | |
911 | #endif | |
33be6271 | 912 | |
5da57f42 | 913 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts) |
1da177e4 LT |
914 | { |
915 | #ifdef CONFIG_NET_CLS_ACT | |
9cc63db5 CW |
916 | struct nlattr *nest; |
917 | ||
22dc13c8 | 918 | if (exts->action && exts->nr_actions) { |
1da177e4 LT |
919 | /* |
920 | * again for backward compatible mode - we want | |
921 | * to work with both old and new modes of entering | |
922 | * tc data even if iproute2 was newer - jhs | |
923 | */ | |
33be6271 | 924 | if (exts->type != TCA_OLD_COMPAT) { |
22dc13c8 WC |
925 | LIST_HEAD(actions); |
926 | ||
5da57f42 | 927 | nest = nla_nest_start(skb, exts->action); |
4b3550ef PM |
928 | if (nest == NULL) |
929 | goto nla_put_failure; | |
22dc13c8 WC |
930 | |
931 | tcf_exts_to_list(exts, &actions); | |
932 | if (tcf_action_dump(skb, &actions, 0, 0) < 0) | |
add93b61 | 933 | goto nla_put_failure; |
4b3550ef | 934 | nla_nest_end(skb, nest); |
5da57f42 | 935 | } else if (exts->police) { |
33be6271 | 936 | struct tc_action *act = tcf_exts_first_act(exts); |
5da57f42 | 937 | nest = nla_nest_start(skb, exts->police); |
63acd680 | 938 | if (nest == NULL || !act) |
4b3550ef | 939 | goto nla_put_failure; |
33be6271 | 940 | if (tcf_action_dump_old(skb, act, 0, 0) < 0) |
add93b61 | 941 | goto nla_put_failure; |
4b3550ef | 942 | nla_nest_end(skb, nest); |
1da177e4 LT |
943 | } |
944 | } | |
1da177e4 | 945 | return 0; |
9cc63db5 CW |
946 | |
947 | nla_put_failure: | |
948 | nla_nest_cancel(skb, nest); | |
1da177e4 | 949 | return -1; |
9cc63db5 CW |
950 | #else |
951 | return 0; | |
952 | #endif | |
1da177e4 | 953 | } |
aa767bfe | 954 | EXPORT_SYMBOL(tcf_exts_dump); |
1da177e4 | 955 | |
aa767bfe | 956 | |
5da57f42 | 957 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts) |
1da177e4 LT |
958 | { |
959 | #ifdef CONFIG_NET_CLS_ACT | |
33be6271 | 960 | struct tc_action *a = tcf_exts_first_act(exts); |
b057df24 | 961 | if (a != NULL && tcf_action_copy_stats(skb, a, 1) < 0) |
33be6271 | 962 | return -1; |
1da177e4 LT |
963 | #endif |
964 | return 0; | |
1da177e4 | 965 | } |
aa767bfe | 966 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
1da177e4 | 967 | |
7091d8c7 HHZ |
968 | int tcf_exts_get_dev(struct net_device *dev, struct tcf_exts *exts, |
969 | struct net_device **hw_dev) | |
970 | { | |
971 | #ifdef CONFIG_NET_CLS_ACT | |
972 | const struct tc_action *a; | |
973 | LIST_HEAD(actions); | |
974 | ||
3bcc0cec | 975 | if (!tcf_exts_has_actions(exts)) |
7091d8c7 HHZ |
976 | return -EINVAL; |
977 | ||
978 | tcf_exts_to_list(exts, &actions); | |
979 | list_for_each_entry(a, &actions, list) { | |
980 | if (a->ops->get_dev) { | |
981 | a->ops->get_dev(a, dev_net(dev), hw_dev); | |
982 | break; | |
983 | } | |
984 | } | |
985 | if (*hw_dev) | |
986 | return 0; | |
987 | #endif | |
988 | return -EOPNOTSUPP; | |
989 | } | |
990 | EXPORT_SYMBOL(tcf_exts_get_dev); | |
991 | ||
1da177e4 LT |
992 | static int __init tc_filter_init(void) |
993 | { | |
c7ac8679 GR |
994 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL, NULL); |
995 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL, NULL); | |
82623c0d | 996 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, |
c7ac8679 | 997 | tc_dump_tfilter, NULL); |
1da177e4 | 998 | |
1da177e4 LT |
999 | return 0; |
1000 | } | |
1001 | ||
1002 | subsys_initcall(tc_filter_init); |