Commit | Line | Data |
---|---|---|
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> |
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 LT |
34 | /* The list of all installed classifier types */ |
35 | ||
2eb9d75c | 36 | static struct tcf_proto_ops *tcf_proto_base __read_mostly; |
1da177e4 LT |
37 | |
38 | /* Protects list of registered TC modules. It is pure SMP lock. */ | |
39 | static DEFINE_RWLOCK(cls_mod_lock); | |
40 | ||
41 | /* Find classifier type by string name */ | |
42 | ||
add93b61 | 43 | static struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind) |
1da177e4 LT |
44 | { |
45 | struct tcf_proto_ops *t = NULL; | |
46 | ||
47 | if (kind) { | |
48 | read_lock(&cls_mod_lock); | |
49 | for (t = tcf_proto_base; t; t = t->next) { | |
add93b61 | 50 | if (nla_strcmp(kind, t->kind) == 0) { |
1da177e4 LT |
51 | if (!try_module_get(t->owner)) |
52 | t = NULL; | |
53 | break; | |
54 | } | |
55 | } | |
56 | read_unlock(&cls_mod_lock); | |
57 | } | |
58 | return t; | |
59 | } | |
60 | ||
61 | /* Register(unregister) new classifier type */ | |
62 | ||
63 | int register_tcf_proto_ops(struct tcf_proto_ops *ops) | |
64 | { | |
65 | struct tcf_proto_ops *t, **tp; | |
66 | int rc = -EEXIST; | |
67 | ||
68 | write_lock(&cls_mod_lock); | |
69 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) | |
70 | if (!strcmp(ops->kind, t->kind)) | |
71 | goto out; | |
72 | ||
73 | ops->next = NULL; | |
74 | *tp = ops; | |
75 | rc = 0; | |
76 | out: | |
77 | write_unlock(&cls_mod_lock); | |
78 | return rc; | |
79 | } | |
aa767bfe | 80 | EXPORT_SYMBOL(register_tcf_proto_ops); |
1da177e4 LT |
81 | |
82 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops) | |
83 | { | |
84 | struct tcf_proto_ops *t, **tp; | |
85 | int rc = -ENOENT; | |
86 | ||
87 | write_lock(&cls_mod_lock); | |
88 | for (tp = &tcf_proto_base; (t=*tp) != NULL; tp = &t->next) | |
89 | if (t == ops) | |
90 | break; | |
91 | ||
92 | if (!t) | |
93 | goto out; | |
94 | *tp = t->next; | |
95 | rc = 0; | |
96 | out: | |
97 | write_unlock(&cls_mod_lock); | |
98 | return rc; | |
99 | } | |
aa767bfe | 100 | EXPORT_SYMBOL(unregister_tcf_proto_ops); |
1da177e4 LT |
101 | |
102 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
103 | struct tcf_proto *tp, unsigned long fh, int event); | |
104 | ||
105 | ||
106 | /* Select new prio value from the range, managed by kernel. */ | |
107 | ||
aa767bfe | 108 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
1da177e4 | 109 | { |
aa767bfe | 110 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
1da177e4 LT |
111 | |
112 | if (tp) | |
113 | first = tp->prio-1; | |
114 | ||
115 | return first; | |
116 | } | |
117 | ||
118 | /* Add/change/delete/get a filter node */ | |
119 | ||
120 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
121 | { | |
3b1e0a65 | 122 | struct net *net = sock_net(skb->sk); |
add93b61 | 123 | struct nlattr *tca[TCA_MAX + 1]; |
55dbc640 | 124 | spinlock_t *root_lock; |
1da177e4 LT |
125 | struct tcmsg *t; |
126 | u32 protocol; | |
127 | u32 prio; | |
128 | u32 nprio; | |
129 | u32 parent; | |
130 | struct net_device *dev; | |
131 | struct Qdisc *q; | |
132 | struct tcf_proto **back, **chain; | |
133 | struct tcf_proto *tp; | |
134 | struct tcf_proto_ops *tp_ops; | |
20fea08b | 135 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
136 | unsigned long cl; |
137 | unsigned long fh; | |
138 | int err; | |
12186be7 | 139 | int tp_created = 0; |
1da177e4 | 140 | |
09ad9bc7 | 141 | if (!net_eq(net, &init_net)) |
b854272b DL |
142 | return -EINVAL; |
143 | ||
1da177e4 | 144 | replay: |
1da177e4 LT |
145 | t = NLMSG_DATA(n); |
146 | protocol = TC_H_MIN(t->tcm_info); | |
147 | prio = TC_H_MAJ(t->tcm_info); | |
148 | nprio = prio; | |
149 | parent = t->tcm_parent; | |
150 | cl = 0; | |
151 | ||
152 | if (prio == 0) { | |
153 | /* If no priority is given, user wants we allocated it. */ | |
154 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
155 | return -ENOENT; | |
aa767bfe | 156 | prio = TC_H_MAKE(0x80000000U, 0U); |
1da177e4 LT |
157 | } |
158 | ||
159 | /* Find head of filter chain. */ | |
160 | ||
161 | /* Find link */ | |
aa767bfe SH |
162 | dev = __dev_get_by_index(&init_net, t->tcm_ifindex); |
163 | if (dev == NULL) | |
1da177e4 LT |
164 | return -ENODEV; |
165 | ||
add93b61 PM |
166 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL); |
167 | if (err < 0) | |
168 | return err; | |
169 | ||
1da177e4 LT |
170 | /* Find qdisc */ |
171 | if (!parent) { | |
af356afa | 172 | q = dev->qdisc; |
1da177e4 | 173 | parent = q->handle; |
aa767bfe SH |
174 | } else { |
175 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); | |
176 | if (q == NULL) | |
177 | return -EINVAL; | |
178 | } | |
1da177e4 LT |
179 | |
180 | /* Is it classful? */ | |
181 | if ((cops = q->ops->cl_ops) == NULL) | |
182 | return -EINVAL; | |
183 | ||
71ebe5e9 PM |
184 | if (cops->tcf_chain == NULL) |
185 | return -EOPNOTSUPP; | |
186 | ||
1da177e4 LT |
187 | /* Do we search for filter, attached to class? */ |
188 | if (TC_H_MIN(parent)) { | |
189 | cl = cops->get(q, parent); | |
190 | if (cl == 0) | |
191 | return -ENOENT; | |
192 | } | |
193 | ||
194 | /* And the last stroke */ | |
195 | chain = cops->tcf_chain(q, cl); | |
196 | err = -EINVAL; | |
197 | if (chain == NULL) | |
198 | goto errout; | |
199 | ||
200 | /* Check the chain for existence of proto-tcf with this priority */ | |
201 | for (back = chain; (tp=*back) != NULL; back = &tp->next) { | |
202 | if (tp->prio >= prio) { | |
203 | if (tp->prio == prio) { | |
204 | if (!nprio || (tp->protocol != protocol && protocol)) | |
205 | goto errout; | |
206 | } else | |
207 | tp = NULL; | |
208 | break; | |
209 | } | |
210 | } | |
211 | ||
102396ae | 212 | root_lock = qdisc_root_sleeping_lock(q); |
55dbc640 | 213 | |
1da177e4 LT |
214 | if (tp == NULL) { |
215 | /* Proto-tcf does not exist, create new one */ | |
216 | ||
add93b61 | 217 | if (tca[TCA_KIND] == NULL || !protocol) |
1da177e4 LT |
218 | goto errout; |
219 | ||
220 | err = -ENOENT; | |
221 | if (n->nlmsg_type != RTM_NEWTFILTER || !(n->nlmsg_flags&NLM_F_CREATE)) | |
222 | goto errout; | |
223 | ||
224 | ||
225 | /* Create new proto tcf */ | |
226 | ||
227 | err = -ENOBUFS; | |
aa767bfe SH |
228 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); |
229 | if (tp == NULL) | |
1da177e4 | 230 | goto errout; |
f2df8249 | 231 | err = -ENOENT; |
add93b61 | 232 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]); |
1da177e4 | 233 | if (tp_ops == NULL) { |
95a5afca | 234 | #ifdef CONFIG_MODULES |
add93b61 | 235 | struct nlattr *kind = tca[TCA_KIND]; |
1da177e4 LT |
236 | char name[IFNAMSIZ]; |
237 | ||
238 | if (kind != NULL && | |
add93b61 | 239 | nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
1da177e4 LT |
240 | rtnl_unlock(); |
241 | request_module("cls_%s", name); | |
242 | rtnl_lock(); | |
243 | tp_ops = tcf_proto_lookup_ops(kind); | |
244 | /* We dropped the RTNL semaphore in order to | |
245 | * perform the module load. So, even if we | |
246 | * succeeded in loading the module we have to | |
247 | * replay the request. We indicate this using | |
248 | * -EAGAIN. | |
249 | */ | |
250 | if (tp_ops != NULL) { | |
251 | module_put(tp_ops->owner); | |
252 | err = -EAGAIN; | |
253 | } | |
254 | } | |
255 | #endif | |
256 | kfree(tp); | |
257 | goto errout; | |
258 | } | |
1da177e4 LT |
259 | tp->ops = tp_ops; |
260 | tp->protocol = protocol; | |
d0ab8ff8 | 261 | tp->prio = nprio ? : TC_H_MAJ(tcf_auto_prio(*back)); |
1da177e4 LT |
262 | tp->q = q; |
263 | tp->classify = tp_ops->classify; | |
264 | tp->classid = parent; | |
aa767bfe SH |
265 | |
266 | err = tp_ops->init(tp); | |
267 | if (err != 0) { | |
1da177e4 LT |
268 | module_put(tp_ops->owner); |
269 | kfree(tp); | |
270 | goto errout; | |
271 | } | |
272 | ||
12186be7 | 273 | tp_created = 1; |
1da177e4 | 274 | |
add93b61 | 275 | } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind)) |
1da177e4 LT |
276 | goto errout; |
277 | ||
278 | fh = tp->ops->get(tp, t->tcm_handle); | |
279 | ||
280 | if (fh == 0) { | |
281 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
55dbc640 | 282 | spin_lock_bh(root_lock); |
1da177e4 | 283 | *back = tp->next; |
323c0488 | 284 | spin_unlock_bh(root_lock); |
1da177e4 LT |
285 | |
286 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
287 | tcf_destroy(tp); | |
288 | err = 0; | |
289 | goto errout; | |
290 | } | |
291 | ||
292 | err = -ENOENT; | |
aa767bfe SH |
293 | if (n->nlmsg_type != RTM_NEWTFILTER || |
294 | !(n->nlmsg_flags & NLM_F_CREATE)) | |
1da177e4 LT |
295 | goto errout; |
296 | } else { | |
297 | switch (n->nlmsg_type) { | |
10297b99 | 298 | case RTM_NEWTFILTER: |
1da177e4 | 299 | err = -EEXIST; |
12186be7 MU |
300 | if (n->nlmsg_flags & NLM_F_EXCL) { |
301 | if (tp_created) | |
302 | tcf_destroy(tp); | |
1da177e4 | 303 | goto errout; |
12186be7 | 304 | } |
1da177e4 LT |
305 | break; |
306 | case RTM_DELTFILTER: | |
307 | err = tp->ops->delete(tp, fh); | |
308 | if (err == 0) | |
309 | tfilter_notify(skb, n, tp, fh, RTM_DELTFILTER); | |
310 | goto errout; | |
311 | case RTM_GETTFILTER: | |
312 | err = tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); | |
313 | goto errout; | |
314 | default: | |
315 | err = -EINVAL; | |
316 | goto errout; | |
317 | } | |
318 | } | |
319 | ||
320 | err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh); | |
12186be7 MU |
321 | if (err == 0) { |
322 | if (tp_created) { | |
323 | spin_lock_bh(root_lock); | |
324 | tp->next = *back; | |
325 | *back = tp; | |
326 | spin_unlock_bh(root_lock); | |
327 | } | |
1da177e4 | 328 | tfilter_notify(skb, n, tp, fh, RTM_NEWTFILTER); |
12186be7 MU |
329 | } else { |
330 | if (tp_created) | |
331 | tcf_destroy(tp); | |
332 | } | |
1da177e4 LT |
333 | |
334 | errout: | |
335 | if (cl) | |
336 | cops->put(q, cl); | |
337 | if (err == -EAGAIN) | |
338 | /* Replay the request. */ | |
339 | goto replay; | |
340 | return err; | |
341 | } | |
342 | ||
aa767bfe SH |
343 | static int tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, |
344 | unsigned long fh, u32 pid, u32 seq, u16 flags, int event) | |
1da177e4 LT |
345 | { |
346 | struct tcmsg *tcm; | |
347 | struct nlmsghdr *nlh; | |
27a884dc | 348 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 349 | |
e431b8c0 | 350 | nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); |
1da177e4 LT |
351 | tcm = NLMSG_DATA(nlh); |
352 | tcm->tcm_family = AF_UNSPEC; | |
9ef1d4c7 | 353 | tcm->tcm__pad1 = 0; |
ad61df91 | 354 | tcm->tcm__pad2 = 0; |
5ce2d488 | 355 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
1da177e4 LT |
356 | tcm->tcm_parent = tp->classid; |
357 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
57e1c487 | 358 | NLA_PUT_STRING(skb, TCA_KIND, tp->ops->kind); |
1da177e4 LT |
359 | tcm->tcm_handle = fh; |
360 | if (RTM_DELTFILTER != event) { | |
361 | tcm->tcm_handle = 0; | |
362 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
add93b61 | 363 | goto nla_put_failure; |
1da177e4 | 364 | } |
27a884dc | 365 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
366 | return skb->len; |
367 | ||
368 | nlmsg_failure: | |
add93b61 | 369 | nla_put_failure: |
dc5fc579 | 370 | nlmsg_trim(skb, b); |
1da177e4 LT |
371 | return -1; |
372 | } | |
373 | ||
374 | static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n, | |
375 | struct tcf_proto *tp, unsigned long fh, int event) | |
376 | { | |
377 | struct sk_buff *skb; | |
378 | u32 pid = oskb ? NETLINK_CB(oskb).pid : 0; | |
379 | ||
380 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
381 | if (!skb) | |
382 | return -ENOBUFS; | |
383 | ||
384 | if (tcf_fill_node(skb, tp, fh, pid, n->nlmsg_seq, 0, event) <= 0) { | |
385 | kfree_skb(skb); | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
aa767bfe SH |
389 | return rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, |
390 | n->nlmsg_flags & NLM_F_ECHO); | |
1da177e4 LT |
391 | } |
392 | ||
aa767bfe | 393 | struct tcf_dump_args { |
1da177e4 LT |
394 | struct tcf_walker w; |
395 | struct sk_buff *skb; | |
396 | struct netlink_callback *cb; | |
397 | }; | |
398 | ||
aa767bfe SH |
399 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
400 | struct tcf_walker *arg) | |
1da177e4 | 401 | { |
aa767bfe | 402 | struct tcf_dump_args *a = (void *)arg; |
1da177e4 LT |
403 | |
404 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).pid, | |
405 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); | |
406 | } | |
407 | ||
bd27a875 | 408 | /* called with RTNL */ |
1da177e4 LT |
409 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) |
410 | { | |
3b1e0a65 | 411 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
412 | int t; |
413 | int s_t; | |
414 | struct net_device *dev; | |
415 | struct Qdisc *q; | |
416 | struct tcf_proto *tp, **chain; | |
aa767bfe | 417 | struct tcmsg *tcm = (struct tcmsg *)NLMSG_DATA(cb->nlh); |
1da177e4 | 418 | unsigned long cl = 0; |
20fea08b | 419 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
420 | struct tcf_dump_args arg; |
421 | ||
09ad9bc7 | 422 | if (!net_eq(net, &init_net)) |
b854272b DL |
423 | return 0; |
424 | ||
1da177e4 LT |
425 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) |
426 | return skb->len; | |
bd27a875 | 427 | if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL) |
1da177e4 LT |
428 | return skb->len; |
429 | ||
1da177e4 | 430 | if (!tcm->tcm_parent) |
af356afa | 431 | q = dev->qdisc; |
1da177e4 LT |
432 | else |
433 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
434 | if (!q) | |
435 | goto out; | |
436 | if ((cops = q->ops->cl_ops) == NULL) | |
437 | goto errout; | |
71ebe5e9 PM |
438 | if (cops->tcf_chain == NULL) |
439 | goto errout; | |
1da177e4 LT |
440 | if (TC_H_MIN(tcm->tcm_parent)) { |
441 | cl = cops->get(q, tcm->tcm_parent); | |
442 | if (cl == 0) | |
443 | goto errout; | |
444 | } | |
445 | chain = cops->tcf_chain(q, cl); | |
446 | if (chain == NULL) | |
447 | goto errout; | |
448 | ||
449 | s_t = cb->args[0]; | |
450 | ||
451 | for (tp=*chain, t=0; tp; tp = tp->next, t++) { | |
452 | if (t < s_t) continue; | |
453 | if (TC_H_MAJ(tcm->tcm_info) && | |
454 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
455 | continue; | |
456 | if (TC_H_MIN(tcm->tcm_info) && | |
457 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
458 | continue; | |
459 | if (t > s_t) | |
460 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | |
461 | if (cb->args[1] == 0) { | |
462 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).pid, | |
aa767bfe SH |
463 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
464 | RTM_NEWTFILTER) <= 0) | |
1da177e4 | 465 | break; |
aa767bfe | 466 | |
1da177e4 LT |
467 | cb->args[1] = 1; |
468 | } | |
469 | if (tp->ops->walk == NULL) | |
470 | continue; | |
471 | arg.w.fn = tcf_node_dump; | |
472 | arg.skb = skb; | |
473 | arg.cb = cb; | |
474 | arg.w.stop = 0; | |
475 | arg.w.skip = cb->args[1]-1; | |
476 | arg.w.count = 0; | |
477 | tp->ops->walk(tp, &arg.w); | |
478 | cb->args[1] = arg.w.count+1; | |
479 | if (arg.w.stop) | |
480 | break; | |
481 | } | |
482 | ||
483 | cb->args[0] = t; | |
484 | ||
485 | errout: | |
486 | if (cl) | |
487 | cops->put(q, cl); | |
488 | out: | |
1da177e4 LT |
489 | return skb->len; |
490 | } | |
491 | ||
aa767bfe | 492 | void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) |
1da177e4 LT |
493 | { |
494 | #ifdef CONFIG_NET_CLS_ACT | |
495 | if (exts->action) { | |
496 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
497 | exts->action = NULL; | |
498 | } | |
1da177e4 LT |
499 | #endif |
500 | } | |
aa767bfe | 501 | EXPORT_SYMBOL(tcf_exts_destroy); |
1da177e4 | 502 | |
add93b61 PM |
503 | int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb, |
504 | struct nlattr *rate_tlv, struct tcf_exts *exts, | |
5239008b | 505 | const struct tcf_ext_map *map) |
1da177e4 LT |
506 | { |
507 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 508 | |
1da177e4 LT |
509 | #ifdef CONFIG_NET_CLS_ACT |
510 | { | |
1da177e4 LT |
511 | struct tc_action *act; |
512 | ||
add93b61 | 513 | if (map->police && tb[map->police]) { |
7ba699c6 | 514 | act = tcf_action_init_1(tb[map->police], rate_tlv, |
aa767bfe | 515 | "police", TCA_ACT_NOREPLACE, |
ab27cfb8 PM |
516 | TCA_ACT_BIND); |
517 | if (IS_ERR(act)) | |
518 | return PTR_ERR(act); | |
1da177e4 LT |
519 | |
520 | act->type = TCA_OLD_COMPAT; | |
521 | exts->action = act; | |
add93b61 | 522 | } else if (map->action && tb[map->action]) { |
7ba699c6 | 523 | act = tcf_action_init(tb[map->action], rate_tlv, NULL, |
ab27cfb8 PM |
524 | TCA_ACT_NOREPLACE, TCA_ACT_BIND); |
525 | if (IS_ERR(act)) | |
526 | return PTR_ERR(act); | |
1da177e4 LT |
527 | |
528 | exts->action = act; | |
529 | } | |
530 | } | |
1da177e4 | 531 | #else |
add93b61 PM |
532 | if ((map->action && tb[map->action]) || |
533 | (map->police && tb[map->police])) | |
1da177e4 LT |
534 | return -EOPNOTSUPP; |
535 | #endif | |
536 | ||
537 | return 0; | |
538 | } | |
aa767bfe | 539 | EXPORT_SYMBOL(tcf_exts_validate); |
1da177e4 | 540 | |
aa767bfe SH |
541 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
542 | struct tcf_exts *src) | |
1da177e4 LT |
543 | { |
544 | #ifdef CONFIG_NET_CLS_ACT | |
545 | if (src->action) { | |
546 | struct tc_action *act; | |
547 | tcf_tree_lock(tp); | |
47a1a1d4 PM |
548 | act = dst->action; |
549 | dst->action = src->action; | |
1da177e4 LT |
550 | tcf_tree_unlock(tp); |
551 | if (act) | |
552 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
553 | } | |
1da177e4 LT |
554 | #endif |
555 | } | |
aa767bfe | 556 | EXPORT_SYMBOL(tcf_exts_change); |
1da177e4 | 557 | |
aa767bfe | 558 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, |
5239008b | 559 | const struct tcf_ext_map *map) |
1da177e4 LT |
560 | { |
561 | #ifdef CONFIG_NET_CLS_ACT | |
562 | if (map->action && exts->action) { | |
563 | /* | |
564 | * again for backward compatible mode - we want | |
565 | * to work with both old and new modes of entering | |
566 | * tc data even if iproute2 was newer - jhs | |
567 | */ | |
4b3550ef | 568 | struct nlattr *nest; |
1da177e4 LT |
569 | |
570 | if (exts->action->type != TCA_OLD_COMPAT) { | |
4b3550ef PM |
571 | nest = nla_nest_start(skb, map->action); |
572 | if (nest == NULL) | |
573 | goto nla_put_failure; | |
1da177e4 | 574 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) |
add93b61 | 575 | goto nla_put_failure; |
4b3550ef | 576 | nla_nest_end(skb, nest); |
1da177e4 | 577 | } else if (map->police) { |
4b3550ef PM |
578 | nest = nla_nest_start(skb, map->police); |
579 | if (nest == NULL) | |
580 | goto nla_put_failure; | |
1da177e4 | 581 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) |
add93b61 | 582 | goto nla_put_failure; |
4b3550ef | 583 | nla_nest_end(skb, nest); |
1da177e4 LT |
584 | } |
585 | } | |
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); |
1da177e4 | 592 | |
aa767bfe SH |
593 | |
594 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
5239008b | 595 | const struct tcf_ext_map *map) |
1da177e4 LT |
596 | { |
597 | #ifdef CONFIG_NET_CLS_ACT | |
598 | if (exts->action) | |
599 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
add93b61 | 600 | goto nla_put_failure; |
1da177e4 LT |
601 | #endif |
602 | return 0; | |
add93b61 | 603 | nla_put_failure: __attribute__ ((unused)) |
1da177e4 LT |
604 | return -1; |
605 | } | |
aa767bfe | 606 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
1da177e4 LT |
607 | |
608 | static int __init tc_filter_init(void) | |
609 | { | |
82623c0d TG |
610 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL); |
611 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL); | |
612 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, | |
613 | tc_dump_tfilter); | |
1da177e4 | 614 | |
1da177e4 LT |
615 | return 0; |
616 | } | |
617 | ||
618 | subsys_initcall(tc_filter_init); |