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 | ||
dc7f9f6e | 43 | static const struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind) |
1da177e4 | 44 | { |
dc7f9f6e | 45 | const struct tcf_proto_ops *t = NULL; |
1da177e4 LT |
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); | |
cc7ec456 | 88 | for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next) |
1da177e4 LT |
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 | 101 | |
7316ae88 TG |
102 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
103 | struct nlmsghdr *n, struct tcf_proto *tp, | |
104 | unsigned long fh, int event); | |
1da177e4 LT |
105 | |
106 | ||
107 | /* Select new prio value from the range, managed by kernel. */ | |
108 | ||
aa767bfe | 109 | static inline u32 tcf_auto_prio(struct tcf_proto *tp) |
1da177e4 | 110 | { |
aa767bfe | 111 | u32 first = TC_H_MAKE(0xC0000000U, 0U); |
1da177e4 LT |
112 | |
113 | if (tp) | |
cc7ec456 | 114 | first = tp->prio - 1; |
1da177e4 LT |
115 | |
116 | return first; | |
117 | } | |
118 | ||
119 | /* Add/change/delete/get a filter node */ | |
120 | ||
121 | static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) | |
122 | { | |
3b1e0a65 | 123 | struct net *net = sock_net(skb->sk); |
add93b61 | 124 | struct nlattr *tca[TCA_MAX + 1]; |
55dbc640 | 125 | spinlock_t *root_lock; |
1da177e4 LT |
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; | |
dc7f9f6e | 135 | const 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; | |
12186be7 | 140 | int tp_created = 0; |
1da177e4 | 141 | |
dfc47ef8 EB |
142 | if ((n->nlmsg_type != RTM_GETTFILTER) && !capable(CAP_NET_ADMIN)) |
143 | return -EPERM; | |
1da177e4 | 144 | replay: |
942b8165 | 145 | t = nlmsg_data(n); |
1da177e4 LT |
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. */ | |
cc7ec456 ED |
154 | if (n->nlmsg_type != RTM_NEWTFILTER || |
155 | !(n->nlmsg_flags & NLM_F_CREATE)) | |
1da177e4 | 156 | return -ENOENT; |
aa767bfe | 157 | prio = TC_H_MAKE(0x80000000U, 0U); |
1da177e4 LT |
158 | } |
159 | ||
160 | /* Find head of filter chain. */ | |
161 | ||
162 | /* Find link */ | |
7316ae88 | 163 | dev = __dev_get_by_index(net, t->tcm_ifindex); |
aa767bfe | 164 | if (dev == NULL) |
1da177e4 LT |
165 | return -ENODEV; |
166 | ||
add93b61 PM |
167 | err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL); |
168 | if (err < 0) | |
169 | return err; | |
170 | ||
1da177e4 LT |
171 | /* Find qdisc */ |
172 | if (!parent) { | |
af356afa | 173 | q = dev->qdisc; |
1da177e4 | 174 | parent = q->handle; |
aa767bfe SH |
175 | } else { |
176 | q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent)); | |
177 | if (q == NULL) | |
178 | return -EINVAL; | |
179 | } | |
1da177e4 LT |
180 | |
181 | /* Is it classful? */ | |
cc7ec456 ED |
182 | cops = q->ops->cl_ops; |
183 | if (!cops) | |
1da177e4 LT |
184 | return -EINVAL; |
185 | ||
71ebe5e9 PM |
186 | if (cops->tcf_chain == NULL) |
187 | return -EOPNOTSUPP; | |
188 | ||
1da177e4 LT |
189 | /* Do we search for filter, attached to class? */ |
190 | if (TC_H_MIN(parent)) { | |
191 | cl = cops->get(q, parent); | |
192 | if (cl == 0) | |
193 | return -ENOENT; | |
194 | } | |
195 | ||
196 | /* And the last stroke */ | |
197 | chain = cops->tcf_chain(q, cl); | |
198 | err = -EINVAL; | |
199 | if (chain == NULL) | |
200 | goto errout; | |
201 | ||
202 | /* Check the chain for existence of proto-tcf with this priority */ | |
cc7ec456 | 203 | for (back = chain; (tp = *back) != NULL; back = &tp->next) { |
1da177e4 LT |
204 | if (tp->prio >= prio) { |
205 | if (tp->prio == prio) { | |
cc7ec456 ED |
206 | if (!nprio || |
207 | (tp->protocol != protocol && protocol)) | |
1da177e4 LT |
208 | goto errout; |
209 | } else | |
210 | tp = NULL; | |
211 | break; | |
212 | } | |
213 | } | |
214 | ||
102396ae | 215 | root_lock = qdisc_root_sleeping_lock(q); |
55dbc640 | 216 | |
1da177e4 LT |
217 | if (tp == NULL) { |
218 | /* Proto-tcf does not exist, create new one */ | |
219 | ||
add93b61 | 220 | if (tca[TCA_KIND] == NULL || !protocol) |
1da177e4 LT |
221 | goto errout; |
222 | ||
223 | err = -ENOENT; | |
cc7ec456 ED |
224 | if (n->nlmsg_type != RTM_NEWTFILTER || |
225 | !(n->nlmsg_flags & NLM_F_CREATE)) | |
1da177e4 LT |
226 | goto errout; |
227 | ||
228 | ||
229 | /* Create new proto tcf */ | |
230 | ||
231 | err = -ENOBUFS; | |
aa767bfe SH |
232 | tp = kzalloc(sizeof(*tp), GFP_KERNEL); |
233 | if (tp == NULL) | |
1da177e4 | 234 | goto errout; |
f2df8249 | 235 | err = -ENOENT; |
add93b61 | 236 | tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]); |
1da177e4 | 237 | if (tp_ops == NULL) { |
95a5afca | 238 | #ifdef CONFIG_MODULES |
add93b61 | 239 | struct nlattr *kind = tca[TCA_KIND]; |
1da177e4 LT |
240 | char name[IFNAMSIZ]; |
241 | ||
242 | if (kind != NULL && | |
add93b61 | 243 | nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) { |
1da177e4 LT |
244 | rtnl_unlock(); |
245 | request_module("cls_%s", name); | |
246 | rtnl_lock(); | |
247 | tp_ops = tcf_proto_lookup_ops(kind); | |
248 | /* We dropped the RTNL semaphore in order to | |
249 | * perform the module load. So, even if we | |
250 | * succeeded in loading the module we have to | |
251 | * replay the request. We indicate this using | |
252 | * -EAGAIN. | |
253 | */ | |
254 | if (tp_ops != NULL) { | |
255 | module_put(tp_ops->owner); | |
256 | err = -EAGAIN; | |
257 | } | |
258 | } | |
259 | #endif | |
260 | kfree(tp); | |
261 | goto errout; | |
262 | } | |
1da177e4 LT |
263 | tp->ops = tp_ops; |
264 | tp->protocol = protocol; | |
d0ab8ff8 | 265 | tp->prio = nprio ? : TC_H_MAJ(tcf_auto_prio(*back)); |
1da177e4 LT |
266 | tp->q = q; |
267 | tp->classify = tp_ops->classify; | |
268 | tp->classid = parent; | |
aa767bfe SH |
269 | |
270 | err = tp_ops->init(tp); | |
271 | if (err != 0) { | |
1da177e4 LT |
272 | module_put(tp_ops->owner); |
273 | kfree(tp); | |
274 | goto errout; | |
275 | } | |
276 | ||
12186be7 | 277 | tp_created = 1; |
1da177e4 | 278 | |
add93b61 | 279 | } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind)) |
1da177e4 LT |
280 | goto errout; |
281 | ||
282 | fh = tp->ops->get(tp, t->tcm_handle); | |
283 | ||
284 | if (fh == 0) { | |
285 | if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) { | |
55dbc640 | 286 | spin_lock_bh(root_lock); |
1da177e4 | 287 | *back = tp->next; |
323c0488 | 288 | spin_unlock_bh(root_lock); |
1da177e4 | 289 | |
7316ae88 | 290 | tfilter_notify(net, skb, n, tp, fh, RTM_DELTFILTER); |
1da177e4 LT |
291 | tcf_destroy(tp); |
292 | err = 0; | |
293 | goto errout; | |
294 | } | |
295 | ||
296 | err = -ENOENT; | |
aa767bfe SH |
297 | if (n->nlmsg_type != RTM_NEWTFILTER || |
298 | !(n->nlmsg_flags & NLM_F_CREATE)) | |
1da177e4 LT |
299 | goto errout; |
300 | } else { | |
301 | switch (n->nlmsg_type) { | |
10297b99 | 302 | case RTM_NEWTFILTER: |
1da177e4 | 303 | err = -EEXIST; |
12186be7 MU |
304 | if (n->nlmsg_flags & NLM_F_EXCL) { |
305 | if (tp_created) | |
306 | tcf_destroy(tp); | |
1da177e4 | 307 | goto errout; |
12186be7 | 308 | } |
1da177e4 LT |
309 | break; |
310 | case RTM_DELTFILTER: | |
311 | err = tp->ops->delete(tp, fh); | |
312 | if (err == 0) | |
7316ae88 | 313 | tfilter_notify(net, skb, n, tp, fh, RTM_DELTFILTER); |
1da177e4 LT |
314 | goto errout; |
315 | case RTM_GETTFILTER: | |
7316ae88 | 316 | err = tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
1da177e4 LT |
317 | goto errout; |
318 | default: | |
319 | err = -EINVAL; | |
320 | goto errout; | |
321 | } | |
322 | } | |
323 | ||
af4c6641 | 324 | err = tp->ops->change(skb, tp, cl, t->tcm_handle, tca, &fh); |
12186be7 MU |
325 | if (err == 0) { |
326 | if (tp_created) { | |
327 | spin_lock_bh(root_lock); | |
328 | tp->next = *back; | |
329 | *back = tp; | |
330 | spin_unlock_bh(root_lock); | |
331 | } | |
7316ae88 | 332 | tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER); |
12186be7 MU |
333 | } else { |
334 | if (tp_created) | |
335 | tcf_destroy(tp); | |
336 | } | |
1da177e4 LT |
337 | |
338 | errout: | |
339 | if (cl) | |
340 | cops->put(q, cl); | |
341 | if (err == -EAGAIN) | |
342 | /* Replay the request. */ | |
343 | goto replay; | |
344 | return err; | |
345 | } | |
346 | ||
aa767bfe | 347 | static int tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, |
15e47304 | 348 | unsigned long fh, u32 portid, u32 seq, u16 flags, int event) |
1da177e4 LT |
349 | { |
350 | struct tcmsg *tcm; | |
351 | struct nlmsghdr *nlh; | |
27a884dc | 352 | unsigned char *b = skb_tail_pointer(skb); |
1da177e4 | 353 | |
15e47304 | 354 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags); |
942b8165 DM |
355 | if (!nlh) |
356 | goto out_nlmsg_trim; | |
357 | tcm = nlmsg_data(nlh); | |
1da177e4 | 358 | tcm->tcm_family = AF_UNSPEC; |
9ef1d4c7 | 359 | tcm->tcm__pad1 = 0; |
ad61df91 | 360 | tcm->tcm__pad2 = 0; |
5ce2d488 | 361 | tcm->tcm_ifindex = qdisc_dev(tp->q)->ifindex; |
1da177e4 LT |
362 | tcm->tcm_parent = tp->classid; |
363 | tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); | |
1b34ec43 DM |
364 | if (nla_put_string(skb, TCA_KIND, tp->ops->kind)) |
365 | goto nla_put_failure; | |
1da177e4 LT |
366 | tcm->tcm_handle = fh; |
367 | if (RTM_DELTFILTER != event) { | |
368 | tcm->tcm_handle = 0; | |
369 | if (tp->ops->dump && tp->ops->dump(tp, fh, skb, tcm) < 0) | |
add93b61 | 370 | goto nla_put_failure; |
1da177e4 | 371 | } |
27a884dc | 372 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
373 | return skb->len; |
374 | ||
942b8165 | 375 | out_nlmsg_trim: |
add93b61 | 376 | nla_put_failure: |
dc5fc579 | 377 | nlmsg_trim(skb, b); |
1da177e4 LT |
378 | return -1; |
379 | } | |
380 | ||
7316ae88 TG |
381 | static int tfilter_notify(struct net *net, struct sk_buff *oskb, |
382 | struct nlmsghdr *n, struct tcf_proto *tp, | |
383 | unsigned long fh, int event) | |
1da177e4 LT |
384 | { |
385 | struct sk_buff *skb; | |
15e47304 | 386 | u32 portid = oskb ? NETLINK_CB(oskb).portid : 0; |
1da177e4 LT |
387 | |
388 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
389 | if (!skb) | |
390 | return -ENOBUFS; | |
391 | ||
15e47304 | 392 | if (tcf_fill_node(skb, tp, fh, portid, n->nlmsg_seq, 0, event) <= 0) { |
1da177e4 LT |
393 | kfree_skb(skb); |
394 | return -EINVAL; | |
395 | } | |
396 | ||
15e47304 | 397 | return rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
aa767bfe | 398 | n->nlmsg_flags & NLM_F_ECHO); |
1da177e4 LT |
399 | } |
400 | ||
aa767bfe | 401 | struct tcf_dump_args { |
1da177e4 LT |
402 | struct tcf_walker w; |
403 | struct sk_buff *skb; | |
404 | struct netlink_callback *cb; | |
405 | }; | |
406 | ||
aa767bfe SH |
407 | static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, |
408 | struct tcf_walker *arg) | |
1da177e4 | 409 | { |
aa767bfe | 410 | struct tcf_dump_args *a = (void *)arg; |
1da177e4 | 411 | |
15e47304 | 412 | return tcf_fill_node(a->skb, tp, n, NETLINK_CB(a->cb->skb).portid, |
1da177e4 LT |
413 | a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTFILTER); |
414 | } | |
415 | ||
bd27a875 | 416 | /* called with RTNL */ |
1da177e4 LT |
417 | static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb) |
418 | { | |
3b1e0a65 | 419 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
420 | int t; |
421 | int s_t; | |
422 | struct net_device *dev; | |
423 | struct Qdisc *q; | |
424 | struct tcf_proto *tp, **chain; | |
942b8165 | 425 | struct tcmsg *tcm = nlmsg_data(cb->nlh); |
1da177e4 | 426 | unsigned long cl = 0; |
20fea08b | 427 | const struct Qdisc_class_ops *cops; |
1da177e4 LT |
428 | struct tcf_dump_args arg; |
429 | ||
430 | if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm))) | |
431 | return skb->len; | |
cc7ec456 ED |
432 | dev = __dev_get_by_index(net, tcm->tcm_ifindex); |
433 | if (!dev) | |
1da177e4 LT |
434 | return skb->len; |
435 | ||
1da177e4 | 436 | if (!tcm->tcm_parent) |
af356afa | 437 | q = dev->qdisc; |
1da177e4 LT |
438 | else |
439 | q = qdisc_lookup(dev, TC_H_MAJ(tcm->tcm_parent)); | |
440 | if (!q) | |
441 | goto out; | |
cc7ec456 ED |
442 | cops = q->ops->cl_ops; |
443 | if (!cops) | |
1da177e4 | 444 | goto errout; |
71ebe5e9 PM |
445 | if (cops->tcf_chain == NULL) |
446 | goto errout; | |
1da177e4 LT |
447 | if (TC_H_MIN(tcm->tcm_parent)) { |
448 | cl = cops->get(q, tcm->tcm_parent); | |
449 | if (cl == 0) | |
450 | goto errout; | |
451 | } | |
452 | chain = cops->tcf_chain(q, cl); | |
453 | if (chain == NULL) | |
454 | goto errout; | |
455 | ||
456 | s_t = cb->args[0]; | |
457 | ||
cc7ec456 ED |
458 | for (tp = *chain, t = 0; tp; tp = tp->next, t++) { |
459 | if (t < s_t) | |
460 | continue; | |
1da177e4 LT |
461 | if (TC_H_MAJ(tcm->tcm_info) && |
462 | TC_H_MAJ(tcm->tcm_info) != tp->prio) | |
463 | continue; | |
464 | if (TC_H_MIN(tcm->tcm_info) && | |
465 | TC_H_MIN(tcm->tcm_info) != tp->protocol) | |
466 | continue; | |
467 | if (t > s_t) | |
468 | memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0])); | |
469 | if (cb->args[1] == 0) { | |
15e47304 | 470 | if (tcf_fill_node(skb, tp, 0, NETLINK_CB(cb->skb).portid, |
aa767bfe SH |
471 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
472 | RTM_NEWTFILTER) <= 0) | |
1da177e4 | 473 | break; |
aa767bfe | 474 | |
1da177e4 LT |
475 | cb->args[1] = 1; |
476 | } | |
477 | if (tp->ops->walk == NULL) | |
478 | continue; | |
479 | arg.w.fn = tcf_node_dump; | |
480 | arg.skb = skb; | |
481 | arg.cb = cb; | |
482 | arg.w.stop = 0; | |
cc7ec456 | 483 | arg.w.skip = cb->args[1] - 1; |
1da177e4 LT |
484 | arg.w.count = 0; |
485 | tp->ops->walk(tp, &arg.w); | |
cc7ec456 | 486 | cb->args[1] = arg.w.count + 1; |
1da177e4 LT |
487 | if (arg.w.stop) |
488 | break; | |
489 | } | |
490 | ||
491 | cb->args[0] = t; | |
492 | ||
493 | errout: | |
494 | if (cl) | |
495 | cops->put(q, cl); | |
496 | out: | |
1da177e4 LT |
497 | return skb->len; |
498 | } | |
499 | ||
aa767bfe | 500 | void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts) |
1da177e4 LT |
501 | { |
502 | #ifdef CONFIG_NET_CLS_ACT | |
503 | if (exts->action) { | |
504 | tcf_action_destroy(exts->action, TCA_ACT_UNBIND); | |
505 | exts->action = NULL; | |
506 | } | |
1da177e4 LT |
507 | #endif |
508 | } | |
aa767bfe | 509 | EXPORT_SYMBOL(tcf_exts_destroy); |
1da177e4 | 510 | |
add93b61 PM |
511 | int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb, |
512 | struct nlattr *rate_tlv, struct tcf_exts *exts, | |
5239008b | 513 | const struct tcf_ext_map *map) |
1da177e4 LT |
514 | { |
515 | memset(exts, 0, sizeof(*exts)); | |
10297b99 | 516 | |
1da177e4 LT |
517 | #ifdef CONFIG_NET_CLS_ACT |
518 | { | |
1da177e4 LT |
519 | struct tc_action *act; |
520 | ||
add93b61 | 521 | if (map->police && tb[map->police]) { |
7ba699c6 | 522 | act = tcf_action_init_1(tb[map->police], rate_tlv, |
aa767bfe | 523 | "police", TCA_ACT_NOREPLACE, |
ab27cfb8 PM |
524 | TCA_ACT_BIND); |
525 | if (IS_ERR(act)) | |
526 | return PTR_ERR(act); | |
1da177e4 LT |
527 | |
528 | act->type = TCA_OLD_COMPAT; | |
529 | exts->action = act; | |
add93b61 | 530 | } else if (map->action && tb[map->action]) { |
7ba699c6 | 531 | act = tcf_action_init(tb[map->action], rate_tlv, NULL, |
ab27cfb8 PM |
532 | TCA_ACT_NOREPLACE, TCA_ACT_BIND); |
533 | if (IS_ERR(act)) | |
534 | return PTR_ERR(act); | |
1da177e4 LT |
535 | |
536 | exts->action = act; | |
537 | } | |
538 | } | |
1da177e4 | 539 | #else |
add93b61 PM |
540 | if ((map->action && tb[map->action]) || |
541 | (map->police && tb[map->police])) | |
1da177e4 LT |
542 | return -EOPNOTSUPP; |
543 | #endif | |
544 | ||
545 | return 0; | |
546 | } | |
aa767bfe | 547 | EXPORT_SYMBOL(tcf_exts_validate); |
1da177e4 | 548 | |
aa767bfe SH |
549 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
550 | struct tcf_exts *src) | |
1da177e4 LT |
551 | { |
552 | #ifdef CONFIG_NET_CLS_ACT | |
553 | if (src->action) { | |
554 | struct tc_action *act; | |
555 | tcf_tree_lock(tp); | |
47a1a1d4 PM |
556 | act = dst->action; |
557 | dst->action = src->action; | |
1da177e4 LT |
558 | tcf_tree_unlock(tp); |
559 | if (act) | |
560 | tcf_action_destroy(act, TCA_ACT_UNBIND); | |
561 | } | |
1da177e4 LT |
562 | #endif |
563 | } | |
aa767bfe | 564 | EXPORT_SYMBOL(tcf_exts_change); |
1da177e4 | 565 | |
aa767bfe | 566 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts, |
5239008b | 567 | const struct tcf_ext_map *map) |
1da177e4 LT |
568 | { |
569 | #ifdef CONFIG_NET_CLS_ACT | |
570 | if (map->action && exts->action) { | |
571 | /* | |
572 | * again for backward compatible mode - we want | |
573 | * to work with both old and new modes of entering | |
574 | * tc data even if iproute2 was newer - jhs | |
575 | */ | |
4b3550ef | 576 | struct nlattr *nest; |
1da177e4 LT |
577 | |
578 | if (exts->action->type != TCA_OLD_COMPAT) { | |
4b3550ef PM |
579 | nest = nla_nest_start(skb, map->action); |
580 | if (nest == NULL) | |
581 | goto nla_put_failure; | |
1da177e4 | 582 | if (tcf_action_dump(skb, exts->action, 0, 0) < 0) |
add93b61 | 583 | goto nla_put_failure; |
4b3550ef | 584 | nla_nest_end(skb, nest); |
1da177e4 | 585 | } else if (map->police) { |
4b3550ef PM |
586 | nest = nla_nest_start(skb, map->police); |
587 | if (nest == NULL) | |
588 | goto nla_put_failure; | |
1da177e4 | 589 | if (tcf_action_dump_old(skb, exts->action, 0, 0) < 0) |
add93b61 | 590 | goto nla_put_failure; |
4b3550ef | 591 | nla_nest_end(skb, nest); |
1da177e4 LT |
592 | } |
593 | } | |
1da177e4 LT |
594 | #endif |
595 | return 0; | |
add93b61 | 596 | nla_put_failure: __attribute__ ((unused)) |
1da177e4 LT |
597 | return -1; |
598 | } | |
aa767bfe | 599 | EXPORT_SYMBOL(tcf_exts_dump); |
1da177e4 | 600 | |
aa767bfe SH |
601 | |
602 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts, | |
5239008b | 603 | const struct tcf_ext_map *map) |
1da177e4 LT |
604 | { |
605 | #ifdef CONFIG_NET_CLS_ACT | |
606 | if (exts->action) | |
607 | if (tcf_action_copy_stats(skb, exts->action, 1) < 0) | |
add93b61 | 608 | goto nla_put_failure; |
1da177e4 LT |
609 | #endif |
610 | return 0; | |
add93b61 | 611 | nla_put_failure: __attribute__ ((unused)) |
1da177e4 LT |
612 | return -1; |
613 | } | |
aa767bfe | 614 | EXPORT_SYMBOL(tcf_exts_dump_stats); |
1da177e4 LT |
615 | |
616 | static int __init tc_filter_init(void) | |
617 | { | |
c7ac8679 GR |
618 | rtnl_register(PF_UNSPEC, RTM_NEWTFILTER, tc_ctl_tfilter, NULL, NULL); |
619 | rtnl_register(PF_UNSPEC, RTM_DELTFILTER, tc_ctl_tfilter, NULL, NULL); | |
82623c0d | 620 | rtnl_register(PF_UNSPEC, RTM_GETTFILTER, tc_ctl_tfilter, |
c7ac8679 | 621 | tc_dump_tfilter, NULL); |
1da177e4 | 622 | |
1da177e4 LT |
623 | return 0; |
624 | } | |
625 | ||
626 | subsys_initcall(tc_filter_init); |