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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> |
1da177e4 | 22 | #include <linux/skbuff.h> |
1da177e4 LT |
23 | #include <linux/init.h> |
24 | #include <linux/kmod.h> | |
dc5fc579 | 25 | #include <linux/netlink.h> |
b854272b DL |
26 | #include <net/net_namespace.h> |
27 | #include <net/sock.h> | |
dc5fc579 | 28 | #include <net/netlink.h> |
1da177e4 LT |
29 | #include <net/pkt_sched.h> |
30 | #include <net/pkt_cls.h> | |
31 | ||
32 | #if 0 /* control */ | |
33 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
34 | #else | |
35 | #define DPRINTK(format,args...) | |
36 | #endif | |
37 | ||
38 | /* The list of all installed classifier types */ | |
39 | ||
40 | static struct tcf_proto_ops *tcf_proto_base; | |
41 | ||
42 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
43 | static DEFINE_RWLOCK(cls_mod_lock); | |
44 | ||
45 | /* Find classifier type by string name */ | |
46 | ||
47 | static struct tcf_proto_ops * tcf_proto_lookup_ops(struct rtattr *kind) | |
48 | { | |
49 | struct tcf_proto_ops *t = NULL; | |
50 | ||
51 | if (kind) { | |
52 | read_lock(&cls_mod_lock); | |
53 | for (t = tcf_proto_base; t; t = t->next) { | |
54 | if (rtattr_strcmp(kind, t->kind) == 0) { | |
55 | if (!try_module_get(t->owner)) | |
56 | t = NULL; | |
57 | break; | |
58 | } | |
59 | } | |
60 | read_unlock(&cls_mod_lock); | |
61 | } | |
62 | return t; | |
63 | } | |
64 | ||
65 | /* Register(unregister) new classifier type */ | |
66 | ||
67 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
68 | { | |
69 | struct tcf_proto_ops *t, **tp; | |
70 | int rc = -EEXIST; | |
71 | ||
72 | write_lock(&cls_mod_lock); | |
73 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
74 | if (!strcmp(ops->kind, t->kind)) | |
75 | goto out; | |
76 | ||
77 | ops->next = NULL; | |
78 | *tp = ops; | |
79 | rc = 0; | |
80 | out: | |
81 | write_unlock(&cls_mod_lock); | |
82 | return rc; | |
83 | } | |
84 | ||
85 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
86 | { | |
87 | struct tcf_proto_ops *t, **tp; | |
88 | int rc = -ENOENT; | |
89 | ||
90 | write_lock(&cls_mod_lock); | |
91 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
92 | if (t == ops) | |
93 | break; | |
94 | ||
95 | if (!t) | |
96 | goto out; | |
97 | *tp = t->next; | |
98 | rc = 0; | |
99 | out: | |
100 | write_unlock(&cls_mod_lock); | |
101 | return rc; | |
102 | } | |
103 | ||
104 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
105 | struct tcf_proto *tp, unsigned long fh, int event); | |
106 | ||
107 | ||
108 | /* Select new prio value from the range, managed by kernel. */ | |
109 | ||
110 | static __inline__ u32 tcf_auto_prio(struct tcf_proto *tp) | |
111 | { | |
112 | u32 first = TC_H_MAKE(0xC0000000U,0U); | |
113 | ||
114 | if (tp) | |
115 | first = tp->prio-1; | |
116 | ||
117 | return first; | |
118 | } | |
119 | ||
120 | /* Add/change/delete/get a filter node */ | |
121 | ||
122 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
123 | { | |
b854272b | 124 | struct net *net = skb->sk->sk_net; |
1da177e4 LT |
125 | struct rtattr **tca; |
126 | struct tcmsg *t; | |
127 | u32 protocol; | |
128 | u32 prio; | |
129 | u32 nprio; | |
130 | u32 parent; | |
131 | struct net_device *dev; | |
132 | struct Qdisc *q; | |
133 | struct tcf_proto **back, **chain; | |
134 | struct tcf_proto *tp; | |
135 | struct tcf_proto_ops *tp_ops; | |
20fea08b | 136 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
137 | unsigned long cl; |
138 | unsigned long fh; | |
139 | int err; | |
140 | ||
b854272b DL |
141 | if (net != &init_net) |
142 | return -EINVAL; | |
143 | ||
1da177e4 LT |
144 | replay: |
145 | tca = arg; | |
146 | t = NLMSG_DATA(n); | |
147 | protocol = TC_H_MIN(t->tcm_info); | |
148 | prio = TC_H_MAJ(t->tcm_info); | |
149 | nprio = prio; | |
150 | parent = t->tcm_parent; | |
151 | cl = 0; | |
152 | ||
153 | if (prio == 0) { | |
154 | /* If no priority is given, user wants we allocated it. */ | |
155 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
156 | return -ENOENT; | |
157 | prio = TC_H_MAKE(0x80000000U,0U); | |
158 | } | |
159 | ||
160 | /* Find head of filter chain. */ | |
161 | ||
162 | /* Find link */ | |
881d966b | 163 | if ((dev = __dev_get_by_index(&init_net, t->tcm_ifindex)) == NULL) |
1da177e4 LT |
164 | return -ENODEV; |
165 | ||
166 | /* Find qdisc */ | |
167 | if (!parent) { | |
168 | q = dev->qdisc_sleeping; | |
169 | parent = q->handle; | |
170 | } else if ((q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent))) == NULL) | |
171 | return -EINVAL; | |
172 | ||
173 | /* Is it classful? */ | |
174 | if ((cops = q->ops->cl_ops) == NULL) | |
175 | return -EINVAL; | |
176 | ||
177 | /* Do we search for filter, attached to class? */ | |
178 | if (TC_H_MIN(parent)) { | |
179 | cl = cops->get(q, parent); | |
180 | if (cl == 0) | |
181 | return -ENOENT; | |
182 | } | |
183 | ||
184 | /* And the last stroke */ | |
185 | chain = cops->tcf_chain(q, cl); | |
186 | err = -EINVAL; | |
187 | if (chain == NULL) | |
188 | goto errout; | |
189 | ||
190 | /* Check the chain for existence of proto-tcf with this priority */ | |
191 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
192 | if (tp->prio >= prio) { | |
193 | if (tp->prio == prio) { | |
194 | if (!nprio || (tp->protocol != protocol && protocol)) | |
195 | goto errout; | |
196 | } else | |
197 | tp = NULL; | |
198 | break; | |
199 | } | |
200 | } | |
201 | ||
202 | if (tp == NULL) { | |
203 | /* Proto-tcf does not exist, create new one */ | |
204 | ||
205 | if (tca[TCA_KIND-1] == NULL || !protocol) | |
206 | goto errout; | |
207 | ||
208 | err = -ENOENT; | |
209 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
210 | goto errout; | |
211 | ||
212 | ||
213 | /* Create new proto tcf */ | |
214 | ||
215 | err = -ENOBUFS; | |
c7b1b249 | 216 | if ((tp = kzalloc(sizeof(*tp), GFP_KERNEL)) == NULL) |
1da177e4 LT |
217 | goto errout; |
218 | err = -EINVAL; | |
219 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND-1]); | |
220 | if (tp_ops == NULL) { | |
221 | #ifdef CONFIG_KMOD | |
222 | struct rtattr *kind = tca[TCA_KIND-1]; | |
223 | char name[IFNAMSIZ]; | |
224 | ||
225 | if (kind != NULL && | |
226 | rtattr_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { | |
227 | rtnl_unlock(); | |
228 | request_module("cls_%s", name); | |
229 | rtnl_lock(); | |
230 | tp_ops = tcf_proto_lookup_ops(kind); | |
231 | /* We dropped the RTNL semaphore in order to | |
232 | * perform the module load. So, even if we | |
233 | * succeeded in loading the module we have to | |
234 | * replay the request. We indicate this using | |
235 | * -EAGAIN. | |
236 | */ | |
237 | if (tp_ops != NULL) { | |
238 | module_put(tp_ops->owner); | |
239 | err = -EAGAIN; | |
240 | } | |
241 | } | |
242 | #endif | |
243 | kfree(tp); | |
244 | goto errout; | |
245 | } | |
1da177e4 LT |
246 | tp->ops = tp_ops; |
247 | tp->protocol = protocol; | |
248 | tp->prio = nprio ? : tcf_auto_prio(*back); | |
249 | tp->q = q; | |
250 | tp->classify = tp_ops->classify; | |
251 | tp->classid = parent; | |
252 | if ((err = tp_ops->init(tp)) != 0) { | |
253 | module_put(tp_ops->owner); | |
254 | kfree(tp); | |
255 | goto errout; | |
256 | } | |
257 | ||
258 | qdisc_lock_tree(dev); | |
259 | tp->next = *back; | |
260 | *back = tp; | |
261 | qdisc_unlock_tree(dev); | |
262 | ||
263 | } else if (tca[TCA_KIND-1] && rtattr_strcmp(tca[TCA_KIND-1], tp->ops->kind)) | |
264 | goto errout; | |
265 | ||
266 | fh = tp->ops->get(tp, t->tcm_handle); | |
267 | ||
268 | if (fh == 0) { | |
269 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
270 | qdisc_lock_tree(dev); | |
271 | *back = tp->next; | |
272 | qdisc_unlock_tree(dev); | |
273 | ||
274 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
275 | tcf_destroy(tp); | |
276 | err = 0; | |
277 | goto errout; | |
278 | } | |
279 | ||
280 | err = -ENOENT; | |
281 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
282 | goto errout; | |
283 | } else { | |
284 | switch (n->nlmsg_type) { | |
10297b99 | 285 | case RTM_NEWTFILTER: |
1da177e4 LT |
286 | err = -EEXIST; |
287 | if (n->nlmsg_flags&NLM_F_EXCL) | |
288 | goto errout; | |
289 | break; | |
290 | case RTM_DELTFILTER: | |
291 | err = tp->ops->delete(tp, fh); | |
292 | if (err == 0) | |
293 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
294 | goto errout; | |
295 | case RTM_GETTFILTER: | |
296 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
297 | goto errout; | |
298 | default: | |
299 | err = -EINVAL; | |
300 | goto errout; | |
301 | } | |
302 | } | |
303 | ||
304 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
305 | if (err == 0) | |
306 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
307 | ||
308 | errout: | |
309 | if (cl) | |
310 | cops->put(q, cl); | |
311 | if (err == -EAGAIN) | |
312 | /* Replay the request. */ | |
313 | goto replay; | |
314 | return err; | |
315 | } | |
316 | ||
317 | static int | |
318 | tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, unsigned long fh, | |
e431b8c0 | 319 | u32 pid, u32 seq, u16 flags, int event) |
1da177e4 LT |
320 | { |
321 | struct tcmsg *tcm; | |
322 | struct nlmsghdr *nlh; | |
27a884dc | 323 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 324 | |
e431b8c0 | 325 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
1da177e4 LT |
326 | tcm = NLMSG_DATA(nlh); |
327 | tcm->tcm_family = AF_UNSPEC; | |
9ef1d4c7 PM |
328 | tcm->tcm__pad1 = 0; |
329 | tcm->tcm__pad1 = 0; | |
1da177e4 LT |
330 | tcm->tcm_ifindex = tp->q->dev->ifindex; |
331 | tcm->tcm_parent = tp->classid; | |
332 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
333 | RTA_PUT(skb, TCA_KIND, IFNAMSIZ, tp->ops->kind); | |
334 | tcm->tcm_handle = fh; | |
335 | if (RTM_DELTFILTER != event) { | |
336 | tcm->tcm_handle = 0; | |
337 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
338 | goto rtattr_failure; | |
339 | } | |
27a884dc | 340 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
341 | return skb->len; |
342 | ||
343 | nlmsg_failure: | |
344 | rtattr_failure: | |
dc5fc579 | 345 | nlmsg_trim(skb, b); |
1da177e4 LT |
346 | return -1; |
347 | } | |
348 | ||
349 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
350 | struct tcf_proto *tp, unsigned long fh, int event) | |
351 | { | |
352 | struct sk_buff *skb; | |
353 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
354 | ||
355 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
356 | if (!skb) | |
357 | return -ENOBUFS; | |
358 | ||
359 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
360 | kfree_skb(skb); | |
361 | return -EINVAL; | |
362 | } | |
363 | ||
97c53cac | 364 | return rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO); |
1da177e4 LT |
365 | } |
366 | ||
367 | struct tcf_dump_args | |
368 | { | |
369 | struct tcf_walker w; | |
370 | struct sk_buff *skb; | |
371 | struct netlink_callback *cb; | |
372 | }; | |
373 | ||
374 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, struct tcf_walker *arg) | |
375 | { | |
376 | struct tcf_dump_args *a = (void*)arg; | |
377 | ||
378 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
379 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
380 | } | |
381 | ||
382 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) | |
383 | { | |
b854272b | 384 | struct net *net = skb->sk->sk_net; |
1da177e4 LT |
385 | int t; |
386 | int s_t; | |
387 | struct net_device *dev; | |
388 | struct Qdisc *q; | |
389 | struct tcf_proto *tp, **chain; | |
390 | struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh); | |
391 | unsigned long cl = 0; | |
20fea08b | 392 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
393 | struct tcf_dump_args arg; |
394 | ||
b854272b DL |
395 | if (net != &init_net) |
396 | return 0; | |
397 | ||
1da177e4 LT |
398 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) |
399 | return skb->len; | |
881d966b | 400 | if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
1da177e4 LT |
401 | return skb->len; |
402 | ||
1da177e4 LT |
403 | if (!tcm->tcm_parent) |
404 | q = dev->qdisc_sleeping; | |
405 | else | |
406 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
407 | if (!q) | |
408 | goto out; | |
409 | if ((cops = q->ops->cl_ops) == NULL) | |
410 | goto errout; | |
411 | if (TC_H_MIN(tcm->tcm_parent)) { | |
412 | cl = cops->get(q, tcm->tcm_parent); | |
413 | if (cl == 0) | |
414 | goto errout; | |
415 | } | |
416 | chain = cops->tcf_chain(q, cl); | |
417 | if (chain == NULL) | |
418 | goto errout; | |
419 | ||
420 | s_t = cb->args[0]; | |
421 | ||
422 | for (tp=*chain, t=0; tp; tp = tp->next, t++) { | |
423 | if (t < s_t) continue; | |
424 | if (TC_H_MAJ(tcm->tcm_info) && | |
425 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
426 | continue; | |
427 | if (TC_H_MIN(tcm->tcm_info) && | |
428 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
429 | continue; | |
430 | if (t > s_t) | |
431 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | |
432 | if (cb->args[1] == 0) { | |
433 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).pid, | |
434 | cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER) <= 0) { | |
435 | break; | |
436 | } | |
437 | cb->args[1] = 1; | |
438 | } | |
439 | if (tp->ops->walk == NULL) | |
440 | continue; | |
441 | arg.w.fn = tcf_node_dump; | |
442 | arg.skb = skb; | |
443 | arg.cb = cb; | |
444 | arg.w.stop = 0; | |
445 | arg.w.skip = cb->args[1]-1; | |
446 | arg.w.count = 0; | |
447 | tp->ops->walk(tp, &arg.w); | |
448 | cb->args[1] = arg.w.count+1; | |
449 | if (arg.w.stop) | |
450 | break; | |
451 | } | |
452 | ||
453 | cb->args[0] = t; | |
454 | ||
455 | errout: | |
456 | if (cl) | |
457 | cops->put(q, cl); | |
458 | out: | |
1da177e4 LT |
459 | dev_put(dev); |
460 | return skb->len; | |
461 | } | |
462 | ||
463 | void | |
464 | tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) | |
465 | { | |
466 | #ifdef CONFIG_NET_CLS_ACT | |
467 | if (exts->action) { | |
468 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
469 | exts->action = NULL; | |
470 | } | |
1da177e4 LT |
471 | #endif |
472 | } | |
473 | ||
474 | ||
475 | int | |
476 | tcf_exts_validate(struct tcf_proto *tp, struct rtattr **tb, | |
10297b99 YH |
477 | struct rtattr *rate_tlv, struct tcf_exts *exts, |
478 | struct tcf_ext_map *map) | |
1da177e4 LT |
479 | { |
480 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 481 | |
1da177e4 LT |
482 | #ifdef CONFIG_NET_CLS_ACT |
483 | { | |
484 | int err; | |
485 | struct tc_action *act; | |
486 | ||
487 | if (map->police && tb[map->police-1]) { | |
488 | act = tcf_action_init_1(tb[map->police-1], rate_tlv, "police", | |
489 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
490 | if (act == NULL) | |
491 | return err; | |
492 | ||
493 | act->type = TCA_OLD_COMPAT; | |
494 | exts->action = act; | |
495 | } else if (map->action && tb[map->action-1]) { | |
496 | act = tcf_action_init(tb[map->action-1], rate_tlv, NULL, | |
497 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
498 | if (act == NULL) | |
499 | return err; | |
500 | ||
501 | exts->action = act; | |
502 | } | |
503 | } | |
1da177e4 LT |
504 | #else |
505 | if ((map->action && tb[map->action-1]) || | |
506 | (map->police && tb[map->police-1])) | |
507 | return -EOPNOTSUPP; | |
508 | #endif | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | void | |
514 | tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, | |
10297b99 | 515 | struct tcf_exts *src) |
1da177e4 LT |
516 | { |
517 | #ifdef CONFIG_NET_CLS_ACT | |
518 | if (src->action) { | |
519 | struct tc_action *act; | |
520 | tcf_tree_lock(tp); | |
521 | act = xchg(&dst->action, src->action); | |
522 | tcf_tree_unlock(tp); | |
523 | if (act) | |
524 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
525 | } | |
1da177e4 LT |
526 | #endif |
527 | } | |
528 | ||
529 | int | |
530 | tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, | |
531 | struct tcf_ext_map *map) | |
532 | { | |
533 | #ifdef CONFIG_NET_CLS_ACT | |
534 | if (map->action && exts->action) { | |
535 | /* | |
536 | * again for backward compatible mode - we want | |
537 | * to work with both old and new modes of entering | |
538 | * tc data even if iproute2 was newer - jhs | |
539 | */ | |
27a884dc | 540 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); |
1da177e4 LT |
541 | |
542 | if (exts->action->type != TCA_OLD_COMPAT) { | |
543 | RTA_PUT(skb, map->action, 0, NULL); | |
544 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) | |
545 | goto rtattr_failure; | |
27a884dc | 546 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
547 | } else if (map->police) { |
548 | RTA_PUT(skb, map->police, 0, NULL); | |
549 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) | |
550 | goto rtattr_failure; | |
27a884dc | 551 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
552 | } |
553 | } | |
1da177e4 LT |
554 | #endif |
555 | return 0; | |
556 | rtattr_failure: __attribute__ ((unused)) | |
557 | return -1; | |
558 | } | |
559 | ||
560 | int | |
561 | tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
10297b99 | 562 | struct tcf_ext_map *map) |
1da177e4 LT |
563 | { |
564 | #ifdef CONFIG_NET_CLS_ACT | |
565 | if (exts->action) | |
566 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
567 | goto rtattr_failure; | |
1da177e4 LT |
568 | #endif |
569 | return 0; | |
570 | rtattr_failure: __attribute__ ((unused)) | |
571 | return -1; | |
572 | } | |
573 | ||
574 | static int __init tc_filter_init(void) | |
575 | { | |
82623c0d TG |
576 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL); |
577 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL); | |
578 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, | |
579 | tc_dump_tfilter); | |
1da177e4 | 580 | |
1da177e4 LT |
581 | return 0; |
582 | } | |
583 | ||
584 | subsys_initcall(tc_filter_init); | |
585 | ||
586 | EXPORT_SYMBOL(register_tcf_proto_ops); | |
587 | EXPORT_SYMBOL(unregister_tcf_proto_ops); | |
588 | EXPORT_SYMBOL(tcf_exts_validate); | |
589 | EXPORT_SYMBOL(tcf_exts_destroy); | |
590 | EXPORT_SYMBOL(tcf_exts_change); | |
591 | EXPORT_SYMBOL(tcf_exts_dump); | |
592 | EXPORT_SYMBOL(tcf_exts_dump_stats); |