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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> | |
32 | #include <linux/rtnetlink.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/kmod.h> | |
35 | #include <net/sock.h> | |
36 | #include <net/pkt_sched.h> | |
37 | #include <net/pkt_cls.h> | |
38 | ||
39 | #if 0 /* control */ | |
40 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
41 | #else | |
42 | #define DPRINTK(format,args...) | |
43 | #endif | |
44 | ||
45 | /* The list of all installed classifier types */ | |
46 | ||
47 | static struct tcf_proto_ops *tcf_proto_base; | |
48 | ||
49 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
50 | static DEFINE_RWLOCK(cls_mod_lock); | |
51 | ||
52 | /* Find classifier type by string name */ | |
53 | ||
54 | static struct tcf_proto_ops * tcf_proto_lookup_ops(struct rtattr *kind) | |
55 | { | |
56 | struct tcf_proto_ops *t = NULL; | |
57 | ||
58 | if (kind) { | |
59 | read_lock(&cls_mod_lock); | |
60 | for (t = tcf_proto_base; t; t = t->next) { | |
61 | if (rtattr_strcmp(kind, t->kind) == 0) { | |
62 | if (!try_module_get(t->owner)) | |
63 | t = NULL; | |
64 | break; | |
65 | } | |
66 | } | |
67 | read_unlock(&cls_mod_lock); | |
68 | } | |
69 | return t; | |
70 | } | |
71 | ||
72 | /* Register(unregister) new classifier type */ | |
73 | ||
74 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
75 | { | |
76 | struct tcf_proto_ops *t, **tp; | |
77 | int rc = -EEXIST; | |
78 | ||
79 | write_lock(&cls_mod_lock); | |
80 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
81 | if (!strcmp(ops->kind, t->kind)) | |
82 | goto out; | |
83 | ||
84 | ops->next = NULL; | |
85 | *tp = ops; | |
86 | rc = 0; | |
87 | out: | |
88 | write_unlock(&cls_mod_lock); | |
89 | return rc; | |
90 | } | |
91 | ||
92 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
93 | { | |
94 | struct tcf_proto_ops *t, **tp; | |
95 | int rc = -ENOENT; | |
96 | ||
97 | write_lock(&cls_mod_lock); | |
98 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
99 | if (t == ops) | |
100 | break; | |
101 | ||
102 | if (!t) | |
103 | goto out; | |
104 | *tp = t->next; | |
105 | rc = 0; | |
106 | out: | |
107 | write_unlock(&cls_mod_lock); | |
108 | return rc; | |
109 | } | |
110 | ||
111 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
112 | struct tcf_proto *tp, unsigned long fh, int event); | |
113 | ||
114 | ||
115 | /* Select new prio value from the range, managed by kernel. */ | |
116 | ||
117 | static __inline__ u32 tcf_auto_prio(struct tcf_proto *tp) | |
118 | { | |
119 | u32 first = TC_H_MAKE(0xC0000000U,0U); | |
120 | ||
121 | if (tp) | |
122 | first = tp->prio-1; | |
123 | ||
124 | return first; | |
125 | } | |
126 | ||
127 | /* Add/change/delete/get a filter node */ | |
128 | ||
129 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
130 | { | |
131 | struct rtattr **tca; | |
132 | struct tcmsg *t; | |
133 | u32 protocol; | |
134 | u32 prio; | |
135 | u32 nprio; | |
136 | u32 parent; | |
137 | struct net_device *dev; | |
138 | struct Qdisc *q; | |
139 | struct tcf_proto **back, **chain; | |
140 | struct tcf_proto *tp; | |
141 | struct tcf_proto_ops *tp_ops; | |
142 | struct Qdisc_class_ops *cops; | |
143 | unsigned long cl; | |
144 | unsigned long fh; | |
145 | int err; | |
146 | ||
147 | replay: | |
148 | tca = arg; | |
149 | t = NLMSG_DATA(n); | |
150 | protocol = TC_H_MIN(t->tcm_info); | |
151 | prio = TC_H_MAJ(t->tcm_info); | |
152 | nprio = prio; | |
153 | parent = t->tcm_parent; | |
154 | cl = 0; | |
155 | ||
156 | if (prio == 0) { | |
157 | /* If no priority is given, user wants we allocated it. */ | |
158 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
159 | return -ENOENT; | |
160 | prio = TC_H_MAKE(0x80000000U,0U); | |
161 | } | |
162 | ||
163 | /* Find head of filter chain. */ | |
164 | ||
165 | /* Find link */ | |
166 | if ((dev = __dev_get_by_index(t->tcm_ifindex)) == NULL) | |
167 | return -ENODEV; | |
168 | ||
169 | /* Find qdisc */ | |
170 | if (!parent) { | |
171 | q = dev->qdisc_sleeping; | |
172 | parent = q->handle; | |
173 | } else if ((q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent))) == NULL) | |
174 | return -EINVAL; | |
175 | ||
176 | /* Is it classful? */ | |
177 | if ((cops = q->ops->cl_ops) == NULL) | |
178 | return -EINVAL; | |
179 | ||
180 | /* Do we search for filter, attached to class? */ | |
181 | if (TC_H_MIN(parent)) { | |
182 | cl = cops->get(q, parent); | |
183 | if (cl == 0) | |
184 | return -ENOENT; | |
185 | } | |
186 | ||
187 | /* And the last stroke */ | |
188 | chain = cops->tcf_chain(q, cl); | |
189 | err = -EINVAL; | |
190 | if (chain == NULL) | |
191 | goto errout; | |
192 | ||
193 | /* Check the chain for existence of proto-tcf with this priority */ | |
194 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
195 | if (tp->prio >= prio) { | |
196 | if (tp->prio == prio) { | |
197 | if (!nprio || (tp->protocol != protocol && protocol)) | |
198 | goto errout; | |
199 | } else | |
200 | tp = NULL; | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | if (tp == NULL) { | |
206 | /* Proto-tcf does not exist, create new one */ | |
207 | ||
208 | if (tca[TCA_KIND-1] == NULL || !protocol) | |
209 | goto errout; | |
210 | ||
211 | err = -ENOENT; | |
212 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
213 | goto errout; | |
214 | ||
215 | ||
216 | /* Create new proto tcf */ | |
217 | ||
218 | err = -ENOBUFS; | |
c7b1b249 | 219 | if ((tp = kzalloc(sizeof(*tp), GFP_KERNEL)) == NULL) |
1da177e4 LT |
220 | goto errout; |
221 | err = -EINVAL; | |
222 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND-1]); | |
223 | if (tp_ops == NULL) { | |
224 | #ifdef CONFIG_KMOD | |
225 | struct rtattr *kind = tca[TCA_KIND-1]; | |
226 | char name[IFNAMSIZ]; | |
227 | ||
228 | if (kind != NULL && | |
229 | rtattr_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { | |
230 | rtnl_unlock(); | |
231 | request_module("cls_%s", name); | |
232 | rtnl_lock(); | |
233 | tp_ops = tcf_proto_lookup_ops(kind); | |
234 | /* We dropped the RTNL semaphore in order to | |
235 | * perform the module load. So, even if we | |
236 | * succeeded in loading the module we have to | |
237 | * replay the request. We indicate this using | |
238 | * -EAGAIN. | |
239 | */ | |
240 | if (tp_ops != NULL) { | |
241 | module_put(tp_ops->owner); | |
242 | err = -EAGAIN; | |
243 | } | |
244 | } | |
245 | #endif | |
246 | kfree(tp); | |
247 | goto errout; | |
248 | } | |
1da177e4 LT |
249 | tp->ops = tp_ops; |
250 | tp->protocol = protocol; | |
251 | tp->prio = nprio ? : tcf_auto_prio(*back); | |
252 | tp->q = q; | |
253 | tp->classify = tp_ops->classify; | |
254 | tp->classid = parent; | |
255 | if ((err = tp_ops->init(tp)) != 0) { | |
256 | module_put(tp_ops->owner); | |
257 | kfree(tp); | |
258 | goto errout; | |
259 | } | |
260 | ||
261 | qdisc_lock_tree(dev); | |
262 | tp->next = *back; | |
263 | *back = tp; | |
264 | qdisc_unlock_tree(dev); | |
265 | ||
266 | } else if (tca[TCA_KIND-1] && rtattr_strcmp(tca[TCA_KIND-1], tp->ops->kind)) | |
267 | goto errout; | |
268 | ||
269 | fh = tp->ops->get(tp, t->tcm_handle); | |
270 | ||
271 | if (fh == 0) { | |
272 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
273 | qdisc_lock_tree(dev); | |
274 | *back = tp->next; | |
275 | qdisc_unlock_tree(dev); | |
276 | ||
277 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
278 | tcf_destroy(tp); | |
279 | err = 0; | |
280 | goto errout; | |
281 | } | |
282 | ||
283 | err = -ENOENT; | |
284 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
285 | goto errout; | |
286 | } else { | |
287 | switch (n->nlmsg_type) { | |
10297b99 | 288 | case RTM_NEWTFILTER: |
1da177e4 LT |
289 | err = -EEXIST; |
290 | if (n->nlmsg_flags&NLM_F_EXCL) | |
291 | goto errout; | |
292 | break; | |
293 | case RTM_DELTFILTER: | |
294 | err = tp->ops->delete(tp, fh); | |
295 | if (err == 0) | |
296 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
297 | goto errout; | |
298 | case RTM_GETTFILTER: | |
299 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
300 | goto errout; | |
301 | default: | |
302 | err = -EINVAL; | |
303 | goto errout; | |
304 | } | |
305 | } | |
306 | ||
307 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
308 | if (err == 0) | |
309 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
310 | ||
311 | errout: | |
312 | if (cl) | |
313 | cops->put(q, cl); | |
314 | if (err == -EAGAIN) | |
315 | /* Replay the request. */ | |
316 | goto replay; | |
317 | return err; | |
318 | } | |
319 | ||
320 | static int | |
321 | tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, unsigned long fh, | |
e431b8c0 | 322 | u32 pid, u32 seq, u16 flags, int event) |
1da177e4 LT |
323 | { |
324 | struct tcmsg *tcm; | |
325 | struct nlmsghdr *nlh; | |
27a884dc | 326 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 327 | |
e431b8c0 | 328 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
1da177e4 LT |
329 | tcm = NLMSG_DATA(nlh); |
330 | tcm->tcm_family = AF_UNSPEC; | |
9ef1d4c7 PM |
331 | tcm->tcm__pad1 = 0; |
332 | tcm->tcm__pad1 = 0; | |
1da177e4 LT |
333 | tcm->tcm_ifindex = tp->q->dev->ifindex; |
334 | tcm->tcm_parent = tp->classid; | |
335 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
336 | RTA_PUT(skb, TCA_KIND, IFNAMSIZ, tp->ops->kind); | |
337 | tcm->tcm_handle = fh; | |
338 | if (RTM_DELTFILTER != event) { | |
339 | tcm->tcm_handle = 0; | |
340 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
341 | goto rtattr_failure; | |
342 | } | |
27a884dc | 343 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
344 | return skb->len; |
345 | ||
346 | nlmsg_failure: | |
347 | rtattr_failure: | |
348 | skb_trim(skb, b - skb->data); | |
349 | return -1; | |
350 | } | |
351 | ||
352 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
353 | struct tcf_proto *tp, unsigned long fh, int event) | |
354 | { | |
355 | struct sk_buff *skb; | |
356 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
357 | ||
358 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
359 | if (!skb) | |
360 | return -ENOBUFS; | |
361 | ||
362 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
363 | kfree_skb(skb); | |
364 | return -EINVAL; | |
365 | } | |
366 | ||
ac6d439d | 367 | return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO); |
1da177e4 LT |
368 | } |
369 | ||
370 | struct tcf_dump_args | |
371 | { | |
372 | struct tcf_walker w; | |
373 | struct sk_buff *skb; | |
374 | struct netlink_callback *cb; | |
375 | }; | |
376 | ||
377 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, struct tcf_walker *arg) | |
378 | { | |
379 | struct tcf_dump_args *a = (void*)arg; | |
380 | ||
381 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
382 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
383 | } | |
384 | ||
385 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) | |
386 | { | |
387 | int t; | |
388 | int s_t; | |
389 | struct net_device *dev; | |
390 | struct Qdisc *q; | |
391 | struct tcf_proto *tp, **chain; | |
392 | struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh); | |
393 | unsigned long cl = 0; | |
394 | struct Qdisc_class_ops *cops; | |
395 | struct tcf_dump_args arg; | |
396 | ||
397 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) | |
398 | return skb->len; | |
399 | if ((dev = dev_get_by_index(tcm->tcm_ifindex)) == NULL) | |
400 | return skb->len; | |
401 | ||
85670cc1 | 402 | read_lock(&qdisc_tree_lock); |
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: | |
85670cc1 | 459 | read_unlock(&qdisc_tree_lock); |
1da177e4 LT |
460 | dev_put(dev); |
461 | return skb->len; | |
462 | } | |
463 | ||
464 | void | |
465 | tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) | |
466 | { | |
467 | #ifdef CONFIG_NET_CLS_ACT | |
468 | if (exts->action) { | |
469 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
470 | exts->action = NULL; | |
471 | } | |
472 | #elif defined CONFIG_NET_CLS_POLICE | |
473 | if (exts->police) { | |
474 | tcf_police_release(exts->police, TCA_ACT_UNBIND); | |
475 | exts->police = NULL; | |
476 | } | |
477 | #endif | |
478 | } | |
479 | ||
480 | ||
481 | int | |
482 | tcf_exts_validate(struct tcf_proto *tp, struct rtattr **tb, | |
10297b99 YH |
483 | struct rtattr *rate_tlv, struct tcf_exts *exts, |
484 | struct tcf_ext_map *map) | |
1da177e4 LT |
485 | { |
486 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 487 | |
1da177e4 LT |
488 | #ifdef CONFIG_NET_CLS_ACT |
489 | { | |
490 | int err; | |
491 | struct tc_action *act; | |
492 | ||
493 | if (map->police && tb[map->police-1]) { | |
494 | act = tcf_action_init_1(tb[map->police-1], rate_tlv, "police", | |
495 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
496 | if (act == NULL) | |
497 | return err; | |
498 | ||
499 | act->type = TCA_OLD_COMPAT; | |
500 | exts->action = act; | |
501 | } else if (map->action && tb[map->action-1]) { | |
502 | act = tcf_action_init(tb[map->action-1], rate_tlv, NULL, | |
503 | TCA_ACT_NOREPLACE, TCA_ACT_BIND, &err); | |
504 | if (act == NULL) | |
505 | return err; | |
506 | ||
507 | exts->action = act; | |
508 | } | |
509 | } | |
510 | #elif defined CONFIG_NET_CLS_POLICE | |
511 | if (map->police && tb[map->police-1]) { | |
512 | struct tcf_police *p; | |
10297b99 | 513 | |
1da177e4 LT |
514 | p = tcf_police_locate(tb[map->police-1], rate_tlv); |
515 | if (p == NULL) | |
516 | return -EINVAL; | |
517 | ||
518 | exts->police = p; | |
519 | } else if (map->action && tb[map->action-1]) | |
520 | return -EOPNOTSUPP; | |
521 | #else | |
522 | if ((map->action && tb[map->action-1]) || | |
523 | (map->police && tb[map->police-1])) | |
524 | return -EOPNOTSUPP; | |
525 | #endif | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | void | |
531 | tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, | |
10297b99 | 532 | struct tcf_exts *src) |
1da177e4 LT |
533 | { |
534 | #ifdef CONFIG_NET_CLS_ACT | |
535 | if (src->action) { | |
536 | struct tc_action *act; | |
537 | tcf_tree_lock(tp); | |
538 | act = xchg(&dst->action, src->action); | |
539 | tcf_tree_unlock(tp); | |
540 | if (act) | |
541 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
542 | } | |
543 | #elif defined CONFIG_NET_CLS_POLICE | |
544 | if (src->police) { | |
545 | struct tcf_police *p; | |
546 | tcf_tree_lock(tp); | |
547 | p = xchg(&dst->police, src->police); | |
548 | tcf_tree_unlock(tp); | |
549 | if (p) | |
550 | tcf_police_release(p, TCA_ACT_UNBIND); | |
551 | } | |
552 | #endif | |
553 | } | |
554 | ||
555 | int | |
556 | tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, | |
557 | struct tcf_ext_map *map) | |
558 | { | |
559 | #ifdef CONFIG_NET_CLS_ACT | |
560 | if (map->action && exts->action) { | |
561 | /* | |
562 | * again for backward compatible mode - we want | |
563 | * to work with both old and new modes of entering | |
564 | * tc data even if iproute2 was newer - jhs | |
565 | */ | |
27a884dc | 566 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); |
1da177e4 LT |
567 | |
568 | if (exts->action->type != TCA_OLD_COMPAT) { | |
569 | RTA_PUT(skb, map->action, 0, NULL); | |
570 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) | |
571 | goto rtattr_failure; | |
27a884dc | 572 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
573 | } else if (map->police) { |
574 | RTA_PUT(skb, map->police, 0, NULL); | |
575 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) | |
576 | goto rtattr_failure; | |
27a884dc | 577 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
578 | } |
579 | } | |
580 | #elif defined CONFIG_NET_CLS_POLICE | |
581 | if (map->police && exts->police) { | |
27a884dc | 582 | struct rtattr *p_rta = (struct rtattr *)skb_tail_pointer(skb); |
1da177e4 LT |
583 | |
584 | RTA_PUT(skb, map->police, 0, NULL); | |
585 | ||
586 | if (tcf_police_dump(skb, exts->police) < 0) | |
587 | goto rtattr_failure; | |
588 | ||
27a884dc | 589 | p_rta->rta_len = skb_tail_pointer(skb) - (u8 *)p_rta; |
1da177e4 LT |
590 | } |
591 | #endif | |
592 | return 0; | |
593 | rtattr_failure: __attribute__ ((unused)) | |
594 | return -1; | |
595 | } | |
596 | ||
597 | int | |
598 | tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
10297b99 | 599 | struct tcf_ext_map *map) |
1da177e4 LT |
600 | { |
601 | #ifdef CONFIG_NET_CLS_ACT | |
602 | if (exts->action) | |
603 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
604 | goto rtattr_failure; | |
605 | #elif defined CONFIG_NET_CLS_POLICE | |
606 | if (exts->police) | |
607 | if (tcf_police_dump_stats(skb, exts->police) < 0) | |
608 | goto rtattr_failure; | |
609 | #endif | |
610 | return 0; | |
611 | rtattr_failure: __attribute__ ((unused)) | |
612 | return -1; | |
613 | } | |
614 | ||
615 | static int __init tc_filter_init(void) | |
616 | { | |
617 | struct rtnetlink_link *link_p = rtnetlink_links[PF_UNSPEC]; | |
618 | ||
619 | /* Setup rtnetlink links. It is made here to avoid | |
620 | exporting large number of public symbols. | |
621 | */ | |
622 | ||
623 | if (link_p) { | |
624 | link_p[RTM_NEWTFILTER-RTM_BASE].doit = tc_ctl_tfilter; | |
625 | link_p[RTM_DELTFILTER-RTM_BASE].doit = tc_ctl_tfilter; | |
626 | link_p[RTM_GETTFILTER-RTM_BASE].doit = tc_ctl_tfilter; | |
627 | link_p[RTM_GETTFILTER-RTM_BASE].dumpit = tc_dump_tfilter; | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | ||
632 | subsys_initcall(tc_filter_init); | |
633 | ||
634 | EXPORT_SYMBOL(register_tcf_proto_ops); | |
635 | EXPORT_SYMBOL(unregister_tcf_proto_ops); | |
636 | EXPORT_SYMBOL(tcf_exts_validate); | |
637 | EXPORT_SYMBOL(tcf_exts_destroy); | |
638 | EXPORT_SYMBOL(tcf_exts_change); | |
639 | EXPORT_SYMBOL(tcf_exts_dump); | |
640 | EXPORT_SYMBOL(tcf_exts_dump_stats); |