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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> |
ab27cfb8 | 26 | #include <linux/err.h> |
b854272b DL |
27 | #include <net/net_namespace.h> |
28 | #include <net/sock.h> | |
dc5fc579 | 29 | #include <net/netlink.h> |
1da177e4 LT |
30 | #include <net/pkt_sched.h> |
31 | #include <net/pkt_cls.h> | |
32 | ||
1da177e4 LT |
33 | /* The list of all installed classifier types */ |
34 | ||
2eb9d75c | 35 | static struct tcf_proto_ops *tcf_proto_base __read_mostly; |
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 | ||
add93b61 | 42 | static struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind) |
1da177e4 LT |
43 | { |
44 | struct tcf_proto_ops *t = NULL; | |
45 | ||
46 | if (kind) { | |
47 | read_lock(&cls_mod_lock); | |
48 | for (t = tcf_proto_base; t; t = t->next) { | |
add93b61 | 49 | if (nla_strcmp(kind, t->kind) == 0) { |
1da177e4 LT |
50 | if (!try_module_get(t->owner)) |
51 | t = NULL; | |
52 | break; | |
53 | } | |
54 | } | |
55 | read_unlock(&cls_mod_lock); | |
56 | } | |
57 | return t; | |
58 | } | |
59 | ||
60 | /* Register(unregister) new classifier type */ | |
61 | ||
62 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
63 | { | |
64 | struct tcf_proto_ops *t, **tp; | |
65 | int rc = -EEXIST; | |
66 | ||
67 | write_lock(&cls_mod_lock); | |
68 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
69 | if (!strcmp(ops->kind, t->kind)) | |
70 | goto out; | |
71 | ||
72 | ops->next = NULL; | |
73 | *tp = ops; | |
74 | rc = 0; | |
75 | out: | |
76 | write_unlock(&cls_mod_lock); | |
77 | return rc; | |
78 | } | |
aa767bfe | 79 | EXPORT_SYMBOL(register_tcf_proto_ops); |
1da177e4 LT |
80 | |
81 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
82 | { | |
83 | struct tcf_proto_ops *t, **tp; | |
84 | int rc = -ENOENT; | |
85 | ||
86 | write_lock(&cls_mod_lock); | |
87 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
88 | if (t == ops) | |
89 | break; | |
90 | ||
91 | if (!t) | |
92 | goto out; | |
93 | *tp = t->next; | |
94 | rc = 0; | |
95 | out: | |
96 | write_unlock(&cls_mod_lock); | |
97 | return rc; | |
98 | } | |
aa767bfe | 99 | EXPORT_SYMBOL(unregister_tcf_proto_ops); |
1da177e4 LT |
100 | |
101 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
102 | struct tcf_proto *tp, unsigned long fh, int event); | |
103 | ||
104 | ||
105 | /* Select new prio value from the range, managed by kernel. */ | |
106 | ||
aa767bfe | 107 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
1da177e4 | 108 | { |
aa767bfe | 109 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
1da177e4 LT |
110 | |
111 | if (tp) | |
112 | first = tp->prio-1; | |
113 | ||
114 | return first; | |
115 | } | |
116 | ||
117 | /* Add/change/delete/get a filter node */ | |
118 | ||
119 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
120 | { | |
3b1e0a65 | 121 | struct net *net = sock_net(skb->sk); |
add93b61 | 122 | struct nlattr *tca[TCA_MAX + 1]; |
55dbc640 | 123 | spinlock_t *root_lock; |
1da177e4 LT |
124 | struct tcmsg *t; |
125 | u32 protocol; | |
126 | u32 prio; | |
127 | u32 nprio; | |
128 | u32 parent; | |
129 | struct net_device *dev; | |
130 | struct Qdisc *q; | |
131 | struct tcf_proto **back, **chain; | |
132 | struct tcf_proto *tp; | |
133 | struct tcf_proto_ops *tp_ops; | |
20fea08b | 134 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
135 | unsigned long cl; |
136 | unsigned long fh; | |
137 | int err; | |
138 | ||
b854272b DL |
139 | if (net != &init_net) |
140 | return -EINVAL; | |
141 | ||
1da177e4 | 142 | replay: |
1da177e4 LT |
143 | t = NLMSG_DATA(n); |
144 | protocol = TC_H_MIN(t->tcm_info); | |
145 | prio = TC_H_MAJ(t->tcm_info); | |
146 | nprio = prio; | |
147 | parent = t->tcm_parent; | |
148 | cl = 0; | |
149 | ||
150 | if (prio == 0) { | |
151 | /* If no priority is given, user wants we allocated it. */ | |
152 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
153 | return -ENOENT; | |
aa767bfe | 154 | prio = TC_H_MAKE(0x80000000U, 0U); |
1da177e4 LT |
155 | } |
156 | ||
157 | /* Find head of filter chain. */ | |
158 | ||
159 | /* Find link */ | |
aa767bfe SH |
160 | dev = __dev_get_by_index(&init_net, t->tcm_ifindex); |
161 | if (dev == NULL) | |
1da177e4 LT |
162 | return -ENODEV; |
163 | ||
add93b61 PM |
164 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL); |
165 | if (err < 0) | |
166 | return err; | |
167 | ||
1da177e4 LT |
168 | /* Find qdisc */ |
169 | if (!parent) { | |
e8a0464c | 170 | struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, 0); |
b0e1e646 | 171 | q = dev_queue->qdisc_sleeping; |
1da177e4 | 172 | parent = q->handle; |
aa767bfe SH |
173 | } else { |
174 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); | |
175 | if (q == NULL) | |
176 | return -EINVAL; | |
177 | } | |
1da177e4 LT |
178 | |
179 | /* Is it classful? */ | |
180 | if ((cops = q->ops->cl_ops) == NULL) | |
181 | return -EINVAL; | |
182 | ||
183 | /* Do we search for filter, attached to class? */ | |
184 | if (TC_H_MIN(parent)) { | |
185 | cl = cops->get(q, parent); | |
186 | if (cl == 0) | |
187 | return -ENOENT; | |
188 | } | |
189 | ||
190 | /* And the last stroke */ | |
191 | chain = cops->tcf_chain(q, cl); | |
192 | err = -EINVAL; | |
193 | if (chain == NULL) | |
194 | goto errout; | |
195 | ||
196 | /* Check the chain for existence of proto-tcf with this priority */ | |
197 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
198 | if (tp->prio >= prio) { | |
199 | if (tp->prio == prio) { | |
200 | if (!nprio || (tp->protocol != protocol && protocol)) | |
201 | goto errout; | |
202 | } else | |
203 | tp = NULL; | |
204 | break; | |
205 | } | |
206 | } | |
207 | ||
102396ae | 208 | root_lock = qdisc_root_sleeping_lock(q); |
55dbc640 | 209 | |
1da177e4 LT |
210 | if (tp == NULL) { |
211 | /* Proto-tcf does not exist, create new one */ | |
212 | ||
add93b61 | 213 | if (tca[TCA_KIND] == NULL || !protocol) |
1da177e4 LT |
214 | goto errout; |
215 | ||
216 | err = -ENOENT; | |
217 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
218 | goto errout; | |
219 | ||
220 | ||
221 | /* Create new proto tcf */ | |
222 | ||
223 | err = -ENOBUFS; | |
aa767bfe SH |
224 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); |
225 | if (tp == NULL) | |
1da177e4 | 226 | goto errout; |
f2df8249 | 227 | err = -ENOENT; |
add93b61 | 228 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]); |
1da177e4 | 229 | if (tp_ops == NULL) { |
95a5afca | 230 | #ifdef CONFIG_MODULES |
add93b61 | 231 | struct nlattr *kind = tca[TCA_KIND]; |
1da177e4 LT |
232 | char name[IFNAMSIZ]; |
233 | ||
234 | if (kind != NULL && | |
add93b61 | 235 | nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
1da177e4 LT |
236 | rtnl_unlock(); |
237 | request_module("cls_%s", name); | |
238 | rtnl_lock(); | |
239 | tp_ops = tcf_proto_lookup_ops(kind); | |
240 | /* We dropped the RTNL semaphore in order to | |
241 | * perform the module load. So, even if we | |
242 | * succeeded in loading the module we have to | |
243 | * replay the request. We indicate this using | |
244 | * -EAGAIN. | |
245 | */ | |
246 | if (tp_ops != NULL) { | |
247 | module_put(tp_ops->owner); | |
248 | err = -EAGAIN; | |
249 | } | |
250 | } | |
251 | #endif | |
252 | kfree(tp); | |
253 | goto errout; | |
254 | } | |
1da177e4 LT |
255 | tp->ops = tp_ops; |
256 | tp->protocol = protocol; | |
257 | tp->prio = nprio ? : tcf_auto_prio(*back); | |
258 | tp->q = q; | |
259 | tp->classify = tp_ops->classify; | |
260 | tp->classid = parent; | |
aa767bfe SH |
261 | |
262 | err = tp_ops->init(tp); | |
263 | if (err != 0) { | |
1da177e4 LT |
264 | module_put(tp_ops->owner); |
265 | kfree(tp); | |
266 | goto errout; | |
267 | } | |
268 | ||
55dbc640 | 269 | spin_lock_bh(root_lock); |
1da177e4 LT |
270 | tp->next = *back; |
271 | *back = tp; | |
55dbc640 | 272 | spin_unlock_bh(root_lock); |
1da177e4 | 273 | |
add93b61 | 274 | } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind)) |
1da177e4 LT |
275 | goto errout; |
276 | ||
277 | fh = tp->ops->get(tp, t->tcm_handle); | |
278 | ||
279 | if (fh == 0) { | |
280 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
55dbc640 | 281 | spin_lock_bh(root_lock); |
1da177e4 | 282 | *back = tp->next; |
323c0488 | 283 | spin_unlock_bh(root_lock); |
1da177e4 LT |
284 | |
285 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
286 | tcf_destroy(tp); | |
287 | err = 0; | |
288 | goto errout; | |
289 | } | |
290 | ||
291 | err = -ENOENT; | |
aa767bfe SH |
292 | if (n->nlmsg_type != RTM_NEWTFILTER || |
293 | !(n->nlmsg_flags & NLM_F_CREATE)) | |
1da177e4 LT |
294 | goto errout; |
295 | } else { | |
296 | switch (n->nlmsg_type) { | |
10297b99 | 297 | case RTM_NEWTFILTER: |
1da177e4 | 298 | err = -EEXIST; |
aa767bfe | 299 | if (n->nlmsg_flags & NLM_F_EXCL) |
1da177e4 LT |
300 | goto errout; |
301 | break; | |
302 | case RTM_DELTFILTER: | |
303 | err = tp->ops->delete(tp, fh); | |
304 | if (err == 0) | |
305 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
306 | goto errout; | |
307 | case RTM_GETTFILTER: | |
308 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
309 | goto errout; | |
310 | default: | |
311 | err = -EINVAL; | |
312 | goto errout; | |
313 | } | |
314 | } | |
315 | ||
316 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
317 | if (err == 0) | |
318 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
319 | ||
320 | errout: | |
321 | if (cl) | |
322 | cops->put(q, cl); | |
323 | if (err == -EAGAIN) | |
324 | /* Replay the request. */ | |
325 | goto replay; | |
326 | return err; | |
327 | } | |
328 | ||
aa767bfe SH |
329 | static int tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, |
330 | unsigned long fh, u32 pid, u32 seq, u16 flags, int event) | |
1da177e4 LT |
331 | { |
332 | struct tcmsg *tcm; | |
333 | struct nlmsghdr *nlh; | |
27a884dc | 334 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 335 | |
e431b8c0 | 336 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
1da177e4 LT |
337 | tcm = NLMSG_DATA(nlh); |
338 | tcm->tcm_family = AF_UNSPEC; | |
9ef1d4c7 PM |
339 | tcm->tcm__pad1 = 0; |
340 | tcm->tcm__pad1 = 0; | |
5ce2d488 | 341 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
1da177e4 LT |
342 | tcm->tcm_parent = tp->classid; |
343 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
57e1c487 | 344 | NLA_PUT_STRING(skb, TCA_KIND, tp->ops->kind); |
1da177e4 LT |
345 | tcm->tcm_handle = fh; |
346 | if (RTM_DELTFILTER != event) { | |
347 | tcm->tcm_handle = 0; | |
348 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
add93b61 | 349 | goto nla_put_failure; |
1da177e4 | 350 | } |
27a884dc | 351 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
352 | return skb->len; |
353 | ||
354 | nlmsg_failure: | |
add93b61 | 355 | nla_put_failure: |
dc5fc579 | 356 | nlmsg_trim(skb, b); |
1da177e4 LT |
357 | return -1; |
358 | } | |
359 | ||
360 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
361 | struct tcf_proto *tp, unsigned long fh, int event) | |
362 | { | |
363 | struct sk_buff *skb; | |
364 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
365 | ||
366 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
367 | if (!skb) | |
368 | return -ENOBUFS; | |
369 | ||
370 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
371 | kfree_skb(skb); | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
aa767bfe SH |
375 | return rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, |
376 | n->nlmsg_flags & NLM_F_ECHO); | |
1da177e4 LT |
377 | } |
378 | ||
aa767bfe | 379 | struct tcf_dump_args { |
1da177e4 LT |
380 | struct tcf_walker w; |
381 | struct sk_buff *skb; | |
382 | struct netlink_callback *cb; | |
383 | }; | |
384 | ||
aa767bfe SH |
385 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
386 | struct tcf_walker *arg) | |
1da177e4 | 387 | { |
aa767bfe | 388 | struct tcf_dump_args *a = (void *)arg; |
1da177e4 LT |
389 | |
390 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
391 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
392 | } | |
393 | ||
394 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) | |
395 | { | |
3b1e0a65 | 396 | struct net *net = sock_net(skb->sk); |
b0e1e646 | 397 | struct netdev_queue *dev_queue; |
1da177e4 LT |
398 | int t; |
399 | int s_t; | |
400 | struct net_device *dev; | |
401 | struct Qdisc *q; | |
402 | struct tcf_proto *tp, **chain; | |
aa767bfe | 403 | struct tcmsg *tcm = (struct tcmsg *)NLMSG_DATA(cb->nlh); |
1da177e4 | 404 | unsigned long cl = 0; |
20fea08b | 405 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
406 | struct tcf_dump_args arg; |
407 | ||
b854272b DL |
408 | if (net != &init_net) |
409 | return 0; | |
410 | ||
1da177e4 LT |
411 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) |
412 | return skb->len; | |
881d966b | 413 | if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
1da177e4 LT |
414 | return skb->len; |
415 | ||
e8a0464c | 416 | dev_queue = netdev_get_tx_queue(dev, 0); |
1da177e4 | 417 | if (!tcm->tcm_parent) |
b0e1e646 | 418 | q = dev_queue->qdisc_sleeping; |
1da177e4 LT |
419 | else |
420 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
421 | if (!q) | |
422 | goto out; | |
423 | if ((cops = q->ops->cl_ops) == NULL) | |
424 | goto errout; | |
425 | if (TC_H_MIN(tcm->tcm_parent)) { | |
426 | cl = cops->get(q, tcm->tcm_parent); | |
427 | if (cl == 0) | |
428 | goto errout; | |
429 | } | |
430 | chain = cops->tcf_chain(q, cl); | |
431 | if (chain == NULL) | |
432 | goto errout; | |
433 | ||
434 | s_t = cb->args[0]; | |
435 | ||
436 | for (tp=*chain, t=0; tp; tp = tp->next, t++) { | |
437 | if (t < s_t) continue; | |
438 | if (TC_H_MAJ(tcm->tcm_info) && | |
439 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
440 | continue; | |
441 | if (TC_H_MIN(tcm->tcm_info) && | |
442 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
443 | continue; | |
444 | if (t > s_t) | |
445 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | |
446 | if (cb->args[1] == 0) { | |
447 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).pid, | |
aa767bfe SH |
448 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
449 | RTM_NEWTFILTER) <= 0) | |
1da177e4 | 450 | break; |
aa767bfe | 451 | |
1da177e4 LT |
452 | cb->args[1] = 1; |
453 | } | |
454 | if (tp->ops->walk == NULL) | |
455 | continue; | |
456 | arg.w.fn = tcf_node_dump; | |
457 | arg.skb = skb; | |
458 | arg.cb = cb; | |
459 | arg.w.stop = 0; | |
460 | arg.w.skip = cb->args[1]-1; | |
461 | arg.w.count = 0; | |
462 | tp->ops->walk(tp, &arg.w); | |
463 | cb->args[1] = arg.w.count+1; | |
464 | if (arg.w.stop) | |
465 | break; | |
466 | } | |
467 | ||
468 | cb->args[0] = t; | |
469 | ||
470 | errout: | |
471 | if (cl) | |
472 | cops->put(q, cl); | |
473 | out: | |
1da177e4 LT |
474 | dev_put(dev); |
475 | return skb->len; | |
476 | } | |
477 | ||
aa767bfe | 478 | void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) |
1da177e4 LT |
479 | { |
480 | #ifdef CONFIG_NET_CLS_ACT | |
481 | if (exts->action) { | |
482 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
483 | exts->action = NULL; | |
484 | } | |
1da177e4 LT |
485 | #endif |
486 | } | |
aa767bfe | 487 | EXPORT_SYMBOL(tcf_exts_destroy); |
1da177e4 | 488 | |
add93b61 PM |
489 | int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb, |
490 | struct nlattr *rate_tlv, struct tcf_exts *exts, | |
5239008b | 491 | const struct tcf_ext_map *map) |
1da177e4 LT |
492 | { |
493 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 494 | |
1da177e4 LT |
495 | #ifdef CONFIG_NET_CLS_ACT |
496 | { | |
1da177e4 LT |
497 | struct tc_action *act; |
498 | ||
add93b61 | 499 | if (map->police && tb[map->police]) { |
7ba699c6 | 500 | act = tcf_action_init_1(tb[map->police], rate_tlv, |
aa767bfe | 501 | "police", TCA_ACT_NOREPLACE, |
ab27cfb8 PM |
502 | TCA_ACT_BIND); |
503 | if (IS_ERR(act)) | |
504 | return PTR_ERR(act); | |
1da177e4 LT |
505 | |
506 | act->type = TCA_OLD_COMPAT; | |
507 | exts->action = act; | |
add93b61 | 508 | } else if (map->action && tb[map->action]) { |
7ba699c6 | 509 | act = tcf_action_init(tb[map->action], rate_tlv, NULL, |
ab27cfb8 PM |
510 | TCA_ACT_NOREPLACE, TCA_ACT_BIND); |
511 | if (IS_ERR(act)) | |
512 | return PTR_ERR(act); | |
1da177e4 LT |
513 | |
514 | exts->action = act; | |
515 | } | |
516 | } | |
1da177e4 | 517 | #else |
add93b61 PM |
518 | if ((map->action && tb[map->action]) || |
519 | (map->police && tb[map->police])) | |
1da177e4 LT |
520 | return -EOPNOTSUPP; |
521 | #endif | |
522 | ||
523 | return 0; | |
524 | } | |
aa767bfe | 525 | EXPORT_SYMBOL(tcf_exts_validate); |
1da177e4 | 526 | |
aa767bfe SH |
527 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
528 | struct tcf_exts *src) | |
1da177e4 LT |
529 | { |
530 | #ifdef CONFIG_NET_CLS_ACT | |
531 | if (src->action) { | |
532 | struct tc_action *act; | |
533 | tcf_tree_lock(tp); | |
534 | act = xchg(&dst->action, src->action); | |
535 | tcf_tree_unlock(tp); | |
536 | if (act) | |
537 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
538 | } | |
1da177e4 LT |
539 | #endif |
540 | } | |
aa767bfe | 541 | EXPORT_SYMBOL(tcf_exts_change); |
1da177e4 | 542 | |
aa767bfe | 543 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, |
5239008b | 544 | const struct tcf_ext_map *map) |
1da177e4 LT |
545 | { |
546 | #ifdef CONFIG_NET_CLS_ACT | |
547 | if (map->action && exts->action) { | |
548 | /* | |
549 | * again for backward compatible mode - we want | |
550 | * to work with both old and new modes of entering | |
551 | * tc data even if iproute2 was newer - jhs | |
552 | */ | |
4b3550ef | 553 | struct nlattr *nest; |
1da177e4 LT |
554 | |
555 | if (exts->action->type != TCA_OLD_COMPAT) { | |
4b3550ef PM |
556 | nest = nla_nest_start(skb, map->action); |
557 | if (nest == NULL) | |
558 | goto nla_put_failure; | |
1da177e4 | 559 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) |
add93b61 | 560 | goto nla_put_failure; |
4b3550ef | 561 | nla_nest_end(skb, nest); |
1da177e4 | 562 | } else if (map->police) { |
4b3550ef PM |
563 | nest = nla_nest_start(skb, map->police); |
564 | if (nest == NULL) | |
565 | goto nla_put_failure; | |
1da177e4 | 566 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) |
add93b61 | 567 | goto nla_put_failure; |
4b3550ef | 568 | nla_nest_end(skb, nest); |
1da177e4 LT |
569 | } |
570 | } | |
1da177e4 LT |
571 | #endif |
572 | return 0; | |
add93b61 | 573 | nla_put_failure: __attribute__ ((unused)) |
1da177e4 LT |
574 | return -1; |
575 | } | |
aa767bfe | 576 | EXPORT_SYMBOL(tcf_exts_dump); |
1da177e4 | 577 | |
aa767bfe SH |
578 | |
579 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
5239008b | 580 | const struct tcf_ext_map *map) |
1da177e4 LT |
581 | { |
582 | #ifdef CONFIG_NET_CLS_ACT | |
583 | if (exts->action) | |
584 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
add93b61 | 585 | goto nla_put_failure; |
1da177e4 LT |
586 | #endif |
587 | return 0; | |
add93b61 | 588 | nla_put_failure: __attribute__ ((unused)) |
1da177e4 LT |
589 | return -1; |
590 | } | |
aa767bfe | 591 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
1da177e4 LT |
592 | |
593 | static int __init tc_filter_init(void) | |
594 | { | |
82623c0d TG |
595 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL); |
596 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL); | |
597 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, | |
598 | tc_dump_tfilter); | |
1da177e4 | 599 | |
1da177e4 LT |
600 | return 0; |
601 | } | |
602 | ||
603 | subsys_initcall(tc_filter_init); |