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 | ||
17 | #include <asm/uaccess.h> | |
18 | #include <asm/system.h> | |
19 | #include <linux/bitops.h> | |
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/types.h> | |
22 | #include <linux/kernel.h> | |
1da177e4 LT |
23 | #include <linux/string.h> |
24 | #include <linux/mm.h> | |
25 | #include <linux/socket.h> | |
26 | #include <linux/sockios.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/skbuff.h> | |
1da177e4 LT |
32 | #include <linux/init.h> |
33 | #include <linux/kmod.h> | |
dc5fc579 ACM |
34 | #include <linux/netlink.h> |
35 | #include <net/netlink.h> | |
1da177e4 LT |
36 | #include <net/sock.h> |
37 | #include <net/pkt_sched.h> | |
38 | #include <net/pkt_cls.h> | |
39 | ||
40 | #if 0 /* control */ | |
41 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
42 | #else | |
43 | #define DPRINTK(format,args...) | |
44 | #endif | |
45 | ||
46 | /* The list of all installed classifier types */ | |
47 | ||
48 | static struct tcf_proto_ops *tcf_proto_base; | |
49 | ||
50 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
51 | static DEFINE_RWLOCK(cls_mod_lock); | |
52 | ||
53 | /* Find classifier type by string name */ | |
54 | ||
55 | static struct tcf_proto_ops * tcf_proto_lookup_ops(struct rtattr *kind) | |
56 | { | |
57 | struct tcf_proto_ops *t = NULL; | |
58 | ||
59 | if (kind) { | |
60 | read_lock(&cls_mod_lock); | |
61 | for (t = tcf_proto_base; t; t = t->next) { | |
62 | if (rtattr_strcmp(kind, t->kind) == 0) { | |
63 | if (!try_module_get(t->owner)) | |
64 | t = NULL; | |
65 | break; | |
66 | } | |
67 | } | |
68 | read_unlock(&cls_mod_lock); | |
69 | } | |
70 | return t; | |
71 | } | |
72 | ||
73 | /* Register(unregister) new classifier type */ | |
74 | ||
75 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
76 | { | |
77 | struct tcf_proto_ops *t, **tp; | |
78 | int rc = -EEXIST; | |
79 | ||
80 | write_lock(&cls_mod_lock); | |
81 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
82 | if (!strcmp(ops->kind, t->kind)) | |
83 | goto out; | |
84 | ||
85 | ops->next = NULL; | |
86 | *tp = ops; | |
87 | rc = 0; | |
88 | out: | |
89 | write_unlock(&cls_mod_lock); | |
90 | return rc; | |
91 | } | |
92 | ||
93 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
94 | { | |
95 | struct tcf_proto_ops *t, **tp; | |
96 | int rc = -ENOENT; | |
97 | ||
98 | write_lock(&cls_mod_lock); | |
99 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
100 | if (t == ops) | |
101 | break; | |
102 | ||
103 | if (!t) | |
104 | goto out; | |
105 | *tp = t->next; | |
106 | rc = 0; | |
107 | out: | |
108 | write_unlock(&cls_mod_lock); | |
109 | return rc; | |
110 | } | |
111 | ||
112 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
113 | struct tcf_proto *tp, unsigned long fh, int event); | |
114 | ||
115 | ||
116 | /* Select new prio value from the range, managed by kernel. */ | |
117 | ||
118 | static __inline__ u32 tcf_auto_prio(struct tcf_proto *tp) | |
119 | { | |
120 | u32 first = TC_H_MAKE(0xC0000000U,0U); | |
121 | ||
122 | if (tp) | |
123 | first = tp->prio-1; | |
124 | ||
125 | return first; | |
126 | } | |
127 | ||
128 | /* Add/change/delete/get a filter node */ | |
129 | ||
130 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
131 | { | |
132 | struct rtattr **tca; | |
133 | struct tcmsg *t; | |
134 | u32 protocol; | |
135 | u32 prio; | |
136 | u32 nprio; | |
137 | u32 parent; | |
138 | struct net_device *dev; | |
139 | struct Qdisc *q; | |
140 | struct tcf_proto **back, **chain; | |
141 | struct tcf_proto *tp; | |
142 | struct tcf_proto_ops *tp_ops; | |
143 | struct Qdisc_class_ops *cops; | |
144 | unsigned long cl; | |
145 | unsigned long fh; | |
146 | int err; | |
147 | ||
148 | replay: | |
149 | tca = arg; | |
150 | t = NLMSG_DATA(n); | |
151 | protocol = TC_H_MIN(t->tcm_info); | |
152 | prio = TC_H_MAJ(t->tcm_info); | |
153 | nprio = prio; | |
154 | parent = t->tcm_parent; | |
155 | cl = 0; | |
156 | ||
157 | if (prio == 0) { | |
158 | /* If no priority is given, user wants we allocated it. */ | |
159 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
160 | return -ENOENT; | |
161 | prio = TC_H_MAKE(0x80000000U,0U); | |
162 | } | |
163 | ||
164 | /* Find head of filter chain. */ | |
165 | ||
166 | /* Find link */ | |
167 | if ((dev = __dev_get_by_index(t->tcm_ifindex)) == NULL) | |
168 | return -ENODEV; | |
169 | ||
170 | /* Find qdisc */ | |
171 | if (!parent) { | |
172 | q = dev->qdisc_sleeping; | |
173 | parent = q->handle; | |
174 | } else if ((q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent))) == NULL) | |
175 | return -EINVAL; | |
176 | ||
177 | /* Is it classful? */ | |
178 | if ((cops = q->ops->cl_ops) == NULL) | |
179 | return -EINVAL; | |
180 | ||
181 | /* Do we search for filter, attached to class? */ | |
182 | if (TC_H_MIN(parent)) { | |
183 | cl = cops->get(q, parent); | |
184 | if (cl == 0) | |
185 | return -ENOENT; | |
186 | } | |
187 | ||
188 | /* And the last stroke */ | |
189 | chain = cops->tcf_chain(q, cl); | |
190 | err = -EINVAL; | |
191 | if (chain == NULL) | |
192 | goto errout; | |
193 | ||
194 | /* Check the chain for existence of proto-tcf with this priority */ | |
195 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
196 | if (tp->prio >= prio) { | |
197 | if (tp->prio == prio) { | |
198 | if (!nprio || (tp->protocol != protocol && protocol)) | |
199 | goto errout; | |
200 | } else | |
201 | tp = NULL; | |
202 | break; | |
203 | } | |
204 | } | |
205 | ||
206 | if (tp == NULL) { | |
207 | /* Proto-tcf does not exist, create new one */ | |
208 | ||
209 | if (tca[TCA_KIND-1] == NULL || !protocol) | |
210 | goto errout; | |
211 | ||
212 | err = -ENOENT; | |
213 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
214 | goto errout; | |
215 | ||
216 | ||
217 | /* Create new proto tcf */ | |
218 | ||
219 | err = -ENOBUFS; | |
c7b1b249 | 220 | if ((tp = kzalloc(sizeof(*tp), GFP_KERNEL)) == NULL) |
1da177e4 LT |
221 | goto errout; |
222 | err = -EINVAL; | |
223 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND-1]); | |
224 | if (tp_ops == NULL) { | |
225 | #ifdef CONFIG_KMOD | |
226 | struct rtattr *kind = tca[TCA_KIND-1]; | |
227 | char name[IFNAMSIZ]; | |
228 | ||
229 | if (kind != NULL && | |
230 | rtattr_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { | |
231 | rtnl_unlock(); | |
232 | request_module("cls_%s", name); | |
233 | rtnl_lock(); | |
234 | tp_ops = tcf_proto_lookup_ops(kind); | |
235 | /* We dropped the RTNL semaphore in order to | |
236 | * perform the module load. So, even if we | |
237 | * succeeded in loading the module we have to | |
238 | * replay the request. We indicate this using | |
239 | * -EAGAIN. | |
240 | */ | |
241 | if (tp_ops != NULL) { | |
242 | module_put(tp_ops->owner); | |
243 | err = -EAGAIN; | |
244 | } | |
245 | } | |
246 | #endif | |
247 | kfree(tp); | |
248 | goto errout; | |
249 | } | |
1da177e4 LT |
250 | tp->ops = tp_ops; |
251 | tp->protocol = protocol; | |
252 | tp->prio = nprio ? : tcf_auto_prio(*back); | |
253 | tp->q = q; | |
254 | tp->classify = tp_ops->classify; | |
255 | tp->classid = parent; | |
256 | if ((err = tp_ops->init(tp)) != 0) { | |
257 | module_put(tp_ops->owner); | |
258 | kfree(tp); | |
259 | goto errout; | |
260 | } | |
261 | ||
262 | qdisc_lock_tree(dev); | |
263 | tp->next = *back; | |
264 | *back = tp; | |
265 | qdisc_unlock_tree(dev); | |
266 | ||
267 | } else if (tca[TCA_KIND-1] && rtattr_strcmp(tca[TCA_KIND-1], tp->ops->kind)) | |
268 | goto errout; | |
269 | ||
270 | fh = tp->ops->get(tp, t->tcm_handle); | |
271 | ||
272 | if (fh == 0) { | |
273 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
274 | qdisc_lock_tree(dev); | |
275 | *back = tp->next; | |
276 | qdisc_unlock_tree(dev); | |
277 | ||
278 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
279 | tcf_destroy(tp); | |
280 | err = 0; | |
281 | goto errout; | |
282 | } | |
283 | ||
284 | err = -ENOENT; | |
285 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
286 | goto errout; | |
287 | } else { | |
288 | switch (n->nlmsg_type) { | |
10297b99 | 289 | case RTM_NEWTFILTER: |
1da177e4 LT |
290 | err = -EEXIST; |
291 | if (n->nlmsg_flags&NLM_F_EXCL) | |
292 | goto errout; | |
293 | break; | |
294 | case RTM_DELTFILTER: | |
295 | err = tp->ops->delete(tp, fh); | |
296 | if (err == 0) | |
297 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
298 | goto errout; | |
299 | case RTM_GETTFILTER: | |
300 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
301 | goto errout; | |
302 | default: | |
303 | err = -EINVAL; | |
304 | goto errout; | |
305 | } | |
306 | } | |
307 | ||
308 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
309 | if (err == 0) | |
310 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
311 | ||
312 | errout: | |
313 | if (cl) | |
314 | cops->put(q, cl); | |
315 | if (err == -EAGAIN) | |
316 | /* Replay the request. */ | |
317 | goto replay; | |
318 | return err; | |
319 | } | |
320 | ||
321 | static int | |
322 | tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, unsigned long fh, | |
e431b8c0 | 323 | u32 pid, u32 seq, u16 flags, int event) |
1da177e4 LT |
324 | { |
325 | struct tcmsg *tcm; | |
326 | struct nlmsghdr *nlh; | |
27a884dc | 327 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 328 | |
e431b8c0 | 329 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
1da177e4 LT |
330 | tcm = NLMSG_DATA(nlh); |
331 | tcm->tcm_family = AF_UNSPEC; | |
9ef1d4c7 PM |
332 | tcm->tcm__pad1 = 0; |
333 | tcm->tcm__pad1 = 0; | |
1da177e4 LT |
334 | tcm->tcm_ifindex = tp->q->dev->ifindex; |
335 | tcm->tcm_parent = tp->classid; | |
336 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
337 | RTA_PUT(skb, TCA_KIND, IFNAMSIZ, tp->ops->kind); | |
338 | tcm->tcm_handle = fh; | |
339 | if (RTM_DELTFILTER != event) { | |
340 | tcm->tcm_handle = 0; | |
341 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
342 | goto rtattr_failure; | |
343 | } | |
27a884dc | 344 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
345 | return skb->len; |
346 | ||
347 | nlmsg_failure: | |
348 | rtattr_failure: | |
dc5fc579 | 349 | nlmsg_trim(skb, b); |
1da177e4 LT |
350 | return -1; |
351 | } | |
352 | ||
353 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
354 | struct tcf_proto *tp, unsigned long fh, int event) | |
355 | { | |
356 | struct sk_buff *skb; | |
357 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
358 | ||
359 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
360 | if (!skb) | |
361 | return -ENOBUFS; | |
362 | ||
363 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
364 | kfree_skb(skb); | |
365 | return -EINVAL; | |
366 | } | |
367 | ||
ac6d439d | 368 | return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO); |
1da177e4 LT |
369 | } |
370 | ||
371 | struct tcf_dump_args | |
372 | { | |
373 | struct tcf_walker w; | |
374 | struct sk_buff *skb; | |
375 | struct netlink_callback *cb; | |
376 | }; | |
377 | ||
378 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, struct tcf_walker *arg) | |
379 | { | |
380 | struct tcf_dump_args *a = (void*)arg; | |
381 | ||
382 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
383 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
384 | } | |
385 | ||
386 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) | |
387 | { | |
388 | int t; | |
389 | int s_t; | |
390 | struct net_device *dev; | |
391 | struct Qdisc *q; | |
392 | struct tcf_proto *tp, **chain; | |
393 | struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh); | |
394 | unsigned long cl = 0; | |
395 | struct Qdisc_class_ops *cops; | |
396 | struct tcf_dump_args arg; | |
397 | ||
398 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) | |
399 | return skb->len; | |
400 | if ((dev = dev_get_by_index(tcm->tcm_ifindex)) == NULL) | |
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 | } | |
471 | #elif defined CONFIG_NET_CLS_POLICE | |
472 | if (exts->police) { | |
473 | tcf_police_release(exts->police, TCA_ACT_UNBIND); | |
474 | exts->police = NULL; | |
475 | } | |
476 | #endif | |
477 | } | |
478 | ||
479 | ||
480 | int | |
481 | tcf_exts_validate(struct tcf_proto *tp, struct rtattr **tb, | |
10297b99 YH |
482 | struct rtattr *rate_tlv, struct tcf_exts *exts, |
483 | struct tcf_ext_map *map) | |
1da177e4 LT |
484 | { |
485 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 486 | |
1da177e4 LT |
487 | #ifdef CONFIG_NET_CLS_ACT |
488 | { | |
489 | int err; | |
490 | struct tc_action *act; | |
491 | ||
492 | if (map->police && tb[map->police-1]) { | |
493 | act = tcf_action_init_1(tb[map->police-1], rate_tlv, "police", | |
494 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
495 | if (act == NULL) | |
496 | return err; | |
497 | ||
498 | act->type = TCA_OLD_COMPAT; | |
499 | exts->action = act; | |
500 | } else if (map->action && tb[map->action-1]) { | |
501 | act = tcf_action_init(tb[map->action-1], rate_tlv, NULL, | |
502 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
503 | if (act == NULL) | |
504 | return err; | |
505 | ||
506 | exts->action = act; | |
507 | } | |
508 | } | |
509 | #elif defined CONFIG_NET_CLS_POLICE | |
510 | if (map->police && tb[map->police-1]) { | |
511 | struct tcf_police *p; | |
10297b99 | 512 | |
1da177e4 LT |
513 | p = tcf_police_locate(tb[map->police-1], rate_tlv); |
514 | if (p == NULL) | |
515 | return -EINVAL; | |
516 | ||
517 | exts->police = p; | |
518 | } else if (map->action && tb[map->action-1]) | |
519 | return -EOPNOTSUPP; | |
520 | #else | |
521 | if ((map->action && tb[map->action-1]) || | |
522 | (map->police && tb[map->police-1])) | |
523 | return -EOPNOTSUPP; | |
524 | #endif | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | void | |
530 | tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, | |
10297b99 | 531 | struct tcf_exts *src) |
1da177e4 LT |
532 | { |
533 | #ifdef CONFIG_NET_CLS_ACT | |
534 | if (src->action) { | |
535 | struct tc_action *act; | |
536 | tcf_tree_lock(tp); | |
537 | act = xchg(&dst->action, src->action); | |
538 | tcf_tree_unlock(tp); | |
539 | if (act) | |
540 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
541 | } | |
542 | #elif defined CONFIG_NET_CLS_POLICE | |
543 | if (src->police) { | |
544 | struct tcf_police *p; | |
545 | tcf_tree_lock(tp); | |
546 | p = xchg(&dst->police, src->police); | |
547 | tcf_tree_unlock(tp); | |
548 | if (p) | |
549 | tcf_police_release(p, TCA_ACT_UNBIND); | |
550 | } | |
551 | #endif | |
552 | } | |
553 | ||
554 | int | |
555 | tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, | |
556 | struct tcf_ext_map *map) | |
557 | { | |
558 | #ifdef CONFIG_NET_CLS_ACT | |
559 | if (map->action && exts->action) { | |
560 | /* | |
561 | * again for backward compatible mode - we want | |
562 | * to work with both old and new modes of entering | |
563 | * tc data even if iproute2 was newer - jhs | |
564 | */ | |
27a884dc | 565 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); |
1da177e4 LT |
566 | |
567 | if (exts->action->type != TCA_OLD_COMPAT) { | |
568 | RTA_PUT(skb, map->action, 0, NULL); | |
569 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) | |
570 | goto rtattr_failure; | |
27a884dc | 571 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
572 | } else if (map->police) { |
573 | RTA_PUT(skb, map->police, 0, NULL); | |
574 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) | |
575 | goto rtattr_failure; | |
27a884dc | 576 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
577 | } |
578 | } | |
579 | #elif defined CONFIG_NET_CLS_POLICE | |
580 | if (map->police && exts->police) { | |
27a884dc | 581 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); |
1da177e4 LT |
582 | |
583 | RTA_PUT(skb, map->police, 0, NULL); | |
584 | ||
585 | if (tcf_police_dump(skb, exts->police) < 0) | |
586 | goto rtattr_failure; | |
587 | ||
27a884dc | 588 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
589 | } |
590 | #endif | |
591 | return 0; | |
592 | rtattr_failure: __attribute__ ((unused)) | |
593 | return -1; | |
594 | } | |
595 | ||
596 | int | |
597 | tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
10297b99 | 598 | struct tcf_ext_map *map) |
1da177e4 LT |
599 | { |
600 | #ifdef CONFIG_NET_CLS_ACT | |
601 | if (exts->action) | |
602 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
603 | goto rtattr_failure; | |
604 | #elif defined CONFIG_NET_CLS_POLICE | |
605 | if (exts->police) | |
606 | if (tcf_police_dump_stats(skb, exts->police) < 0) | |
607 | goto rtattr_failure; | |
608 | #endif | |
609 | return 0; | |
610 | rtattr_failure: __attribute__ ((unused)) | |
611 | return -1; | |
612 | } | |
613 | ||
614 | static int __init tc_filter_init(void) | |
615 | { | |
82623c0d TG |
616 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL); |
617 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL); | |
618 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, | |
619 | tc_dump_tfilter); | |
1da177e4 | 620 | |
1da177e4 LT |
621 | return 0; |
622 | } | |
623 | ||
624 | subsys_initcall(tc_filter_init); | |
625 | ||
626 | EXPORT_SYMBOL(register_tcf_proto_ops); | |
627 | EXPORT_SYMBOL(unregister_tcf_proto_ops); | |
628 | EXPORT_SYMBOL(tcf_exts_validate); | |
629 | EXPORT_SYMBOL(tcf_exts_destroy); | |
630 | EXPORT_SYMBOL(tcf_exts_change); | |
631 | EXPORT_SYMBOL(tcf_exts_dump); | |
632 | EXPORT_SYMBOL(tcf_exts_dump_stats); |