Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net/sched/act_api.c Packet action 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 | * Author: Jamal Hadi Salim | |
10 | * | |
11 | * | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/types.h> |
15 | #include <linux/kernel.h> | |
1da177e4 | 16 | #include <linux/string.h> |
1da177e4 | 17 | #include <linux/errno.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 | 19 | #include <linux/skbuff.h> |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/kmod.h> | |
ab27cfb8 | 22 | #include <linux/err.h> |
3a9a231d | 23 | #include <linux/module.h> |
b3f55bdd JP |
24 | #include <linux/rhashtable.h> |
25 | #include <linux/list.h> | |
b854272b DL |
26 | #include <net/net_namespace.h> |
27 | #include <net/sock.h> | |
1da177e4 | 28 | #include <net/sch_generic.h> |
1045ba77 | 29 | #include <net/pkt_cls.h> |
1da177e4 | 30 | #include <net/act_api.h> |
dc5fc579 | 31 | #include <net/netlink.h> |
1da177e4 | 32 | |
db50514f JP |
33 | static int tcf_action_goto_chain_init(struct tc_action *a, struct tcf_proto *tp) |
34 | { | |
35 | u32 chain_index = a->tcfa_action & TC_ACT_EXT_VAL_MASK; | |
36 | ||
37 | if (!tp) | |
38 | return -EINVAL; | |
367a8ce8 | 39 | a->goto_chain = tcf_chain_get(tp->chain->block, chain_index, true); |
db50514f JP |
40 | if (!a->goto_chain) |
41 | return -ENOMEM; | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static void tcf_action_goto_chain_fini(struct tc_action *a) | |
46 | { | |
47 | tcf_chain_put(a->goto_chain); | |
48 | } | |
49 | ||
50 | static void tcf_action_goto_chain_exec(const struct tc_action *a, | |
51 | struct tcf_result *res) | |
52 | { | |
53 | const struct tcf_chain *chain = a->goto_chain; | |
54 | ||
55 | res->goto_tp = rcu_dereference_bh(chain->filter_chain); | |
56 | } | |
57 | ||
d7fb60b9 CW |
58 | /* XXX: For standalone actions, we don't need a RCU grace period either, because |
59 | * actions are always connected to filters and filters are already destroyed in | |
60 | * RCU callbacks, so after a RCU grace period actions are already disconnected | |
61 | * from filters. Readers later can not find us. | |
62 | */ | |
63 | static void free_tcf(struct tc_action *p) | |
519c818e | 64 | { |
519c818e ED |
65 | free_percpu(p->cpu_bstats); |
66 | free_percpu(p->cpu_qstats); | |
1045ba77 JHS |
67 | |
68 | if (p->act_cookie) { | |
69 | kfree(p->act_cookie->data); | |
70 | kfree(p->act_cookie); | |
71 | } | |
db50514f JP |
72 | if (p->goto_chain) |
73 | tcf_action_goto_chain_fini(p); | |
1045ba77 | 74 | |
519c818e ED |
75 | kfree(p); |
76 | } | |
77 | ||
65a206c0 | 78 | static void tcf_idr_remove(struct tcf_idrinfo *idrinfo, struct tc_action *p) |
e9ce1cd3 | 79 | { |
65a206c0 CM |
80 | spin_lock_bh(&idrinfo->lock); |
81 | idr_remove_ext(&idrinfo->action_idr, p->tcfa_index); | |
82 | spin_unlock_bh(&idrinfo->lock); | |
1c0d32fd | 83 | gen_kill_estimator(&p->tcfa_rate_est); |
d7fb60b9 | 84 | free_tcf(p); |
e9ce1cd3 | 85 | } |
e9ce1cd3 | 86 | |
65a206c0 | 87 | int __tcf_idr_release(struct tc_action *p, bool bind, bool strict) |
e9ce1cd3 DM |
88 | { |
89 | int ret = 0; | |
90 | ||
91 | if (p) { | |
92 | if (bind) | |
ec0595cc WC |
93 | p->tcfa_bindcnt--; |
94 | else if (strict && p->tcfa_bindcnt > 0) | |
55334a5d | 95 | return -EPERM; |
e9ce1cd3 | 96 | |
ec0595cc WC |
97 | p->tcfa_refcnt--; |
98 | if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) { | |
99 | if (p->ops->cleanup) | |
100 | p->ops->cleanup(p, bind); | |
65a206c0 | 101 | tcf_idr_remove(p->idrinfo, p); |
1d4150c0 | 102 | ret = ACT_P_DELETED; |
e9ce1cd3 DM |
103 | } |
104 | } | |
28e6b67f | 105 | |
e9ce1cd3 DM |
106 | return ret; |
107 | } | |
65a206c0 | 108 | EXPORT_SYMBOL(__tcf_idr_release); |
e9ce1cd3 | 109 | |
65a206c0 | 110 | static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, |
a85a970a | 111 | struct netlink_callback *cb) |
e9ce1cd3 | 112 | { |
65a206c0 | 113 | int err = 0, index = -1, s_i = 0, n_i = 0; |
90825b23 | 114 | u32 act_flags = cb->args[2]; |
e62e484d | 115 | unsigned long jiffy_since = cb->args[3]; |
4b3550ef | 116 | struct nlattr *nest; |
65a206c0 CM |
117 | struct idr *idr = &idrinfo->action_idr; |
118 | struct tc_action *p; | |
119 | unsigned long id = 1; | |
e9ce1cd3 | 120 | |
65a206c0 | 121 | spin_lock_bh(&idrinfo->lock); |
e9ce1cd3 DM |
122 | |
123 | s_i = cb->args[0]; | |
124 | ||
65a206c0 CM |
125 | idr_for_each_entry_ext(idr, p, id) { |
126 | index++; | |
127 | if (index < s_i) | |
128 | continue; | |
129 | ||
130 | if (jiffy_since && | |
131 | time_after(jiffy_since, | |
132 | (unsigned long)p->tcfa_tm.lastuse)) | |
133 | continue; | |
134 | ||
135 | nest = nla_nest_start(skb, n_i); | |
136 | if (!nest) | |
137 | goto nla_put_failure; | |
138 | err = tcf_action_dump_1(skb, p, 0, 0); | |
139 | if (err < 0) { | |
140 | index--; | |
141 | nlmsg_trim(skb, nest); | |
142 | goto done; | |
e9ce1cd3 | 143 | } |
65a206c0 CM |
144 | nla_nest_end(skb, nest); |
145 | n_i++; | |
146 | if (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) && | |
147 | n_i >= TCA_ACT_MAX_PRIO) | |
148 | goto done; | |
e9ce1cd3 DM |
149 | } |
150 | done: | |
e62e484d JHS |
151 | if (index >= 0) |
152 | cb->args[0] = index + 1; | |
153 | ||
65a206c0 | 154 | spin_unlock_bh(&idrinfo->lock); |
90825b23 | 155 | if (n_i) { |
90825b23 JHS |
156 | if (act_flags & TCA_FLAG_LARGE_DUMP_ON) |
157 | cb->args[1] = n_i; | |
158 | } | |
e9ce1cd3 DM |
159 | return n_i; |
160 | ||
7ba699c6 | 161 | nla_put_failure: |
4b3550ef | 162 | nla_nest_cancel(skb, nest); |
e9ce1cd3 DM |
163 | goto done; |
164 | } | |
165 | ||
65a206c0 | 166 | static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, |
a85a970a | 167 | const struct tc_action_ops *ops) |
e9ce1cd3 | 168 | { |
4b3550ef | 169 | struct nlattr *nest; |
65a206c0 | 170 | int n_i = 0; |
55334a5d | 171 | int ret = -EINVAL; |
65a206c0 CM |
172 | struct idr *idr = &idrinfo->action_idr; |
173 | struct tc_action *p; | |
174 | unsigned long id = 1; | |
e9ce1cd3 | 175 | |
a85a970a | 176 | nest = nla_nest_start(skb, 0); |
4b3550ef PM |
177 | if (nest == NULL) |
178 | goto nla_put_failure; | |
a85a970a | 179 | if (nla_put_string(skb, TCA_KIND, ops->kind)) |
1b34ec43 | 180 | goto nla_put_failure; |
65a206c0 CM |
181 | |
182 | idr_for_each_entry_ext(idr, p, id) { | |
183 | ret = __tcf_idr_release(p, false, true); | |
184 | if (ret == ACT_P_DELETED) { | |
255cd50f | 185 | module_put(ops->owner); |
65a206c0 CM |
186 | n_i++; |
187 | } else if (ret < 0) { | |
188 | goto nla_put_failure; | |
e9ce1cd3 DM |
189 | } |
190 | } | |
1b34ec43 DM |
191 | if (nla_put_u32(skb, TCA_FCNT, n_i)) |
192 | goto nla_put_failure; | |
4b3550ef | 193 | nla_nest_end(skb, nest); |
e9ce1cd3 DM |
194 | |
195 | return n_i; | |
7ba699c6 | 196 | nla_put_failure: |
4b3550ef | 197 | nla_nest_cancel(skb, nest); |
55334a5d | 198 | return ret; |
e9ce1cd3 DM |
199 | } |
200 | ||
ddf97ccd WC |
201 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, |
202 | struct netlink_callback *cb, int type, | |
a85a970a | 203 | const struct tc_action_ops *ops) |
e9ce1cd3 | 204 | { |
65a206c0 | 205 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
ddf97ccd | 206 | |
e9ce1cd3 | 207 | if (type == RTM_DELACTION) { |
65a206c0 | 208 | return tcf_del_walker(idrinfo, skb, ops); |
e9ce1cd3 | 209 | } else if (type == RTM_GETACTION) { |
65a206c0 | 210 | return tcf_dump_walker(idrinfo, skb, cb); |
e9ce1cd3 | 211 | } else { |
6ff9c364 | 212 | WARN(1, "tcf_generic_walker: unknown action %d\n", type); |
e9ce1cd3 DM |
213 | return -EINVAL; |
214 | } | |
215 | } | |
ddf97ccd | 216 | EXPORT_SYMBOL(tcf_generic_walker); |
e9ce1cd3 | 217 | |
65a206c0 | 218 | static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo) |
e9ce1cd3 | 219 | { |
ec0595cc | 220 | struct tc_action *p = NULL; |
e9ce1cd3 | 221 | |
65a206c0 CM |
222 | spin_lock_bh(&idrinfo->lock); |
223 | p = idr_find_ext(&idrinfo->action_idr, index); | |
224 | spin_unlock_bh(&idrinfo->lock); | |
e9ce1cd3 DM |
225 | |
226 | return p; | |
227 | } | |
e9ce1cd3 | 228 | |
65a206c0 | 229 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index) |
e9ce1cd3 | 230 | { |
65a206c0 CM |
231 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
232 | struct tc_action *p = tcf_idr_lookup(index, idrinfo); | |
e9ce1cd3 DM |
233 | |
234 | if (p) { | |
ec0595cc | 235 | *a = p; |
e9ce1cd3 DM |
236 | return 1; |
237 | } | |
238 | return 0; | |
239 | } | |
65a206c0 | 240 | EXPORT_SYMBOL(tcf_idr_search); |
e9ce1cd3 | 241 | |
65a206c0 CM |
242 | bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, |
243 | int bind) | |
e9ce1cd3 | 244 | { |
65a206c0 CM |
245 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
246 | struct tc_action *p = tcf_idr_lookup(index, idrinfo); | |
ec0595cc | 247 | |
65a206c0 | 248 | if (index && p) { |
76aab2c1 | 249 | if (bind) |
ec0595cc WC |
250 | p->tcfa_bindcnt++; |
251 | p->tcfa_refcnt++; | |
252 | *a = p; | |
b2313077 | 253 | return true; |
e9ce1cd3 | 254 | } |
b2313077 | 255 | return false; |
e9ce1cd3 | 256 | } |
65a206c0 | 257 | EXPORT_SYMBOL(tcf_idr_check); |
e9ce1cd3 | 258 | |
65a206c0 | 259 | void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est) |
86062033 | 260 | { |
86062033 | 261 | if (est) |
1c0d32fd | 262 | gen_kill_estimator(&a->tcfa_rate_est); |
d7fb60b9 | 263 | free_tcf(a); |
86062033 | 264 | } |
65a206c0 | 265 | EXPORT_SYMBOL(tcf_idr_cleanup); |
86062033 | 266 | |
65a206c0 CM |
267 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
268 | struct tc_action **a, const struct tc_action_ops *ops, | |
269 | int bind, bool cpustats) | |
e9ce1cd3 | 270 | { |
ec0595cc | 271 | struct tc_action *p = kzalloc(ops->size, GFP_KERNEL); |
65a206c0 CM |
272 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
273 | struct idr *idr = &idrinfo->action_idr; | |
519c818e | 274 | int err = -ENOMEM; |
65a206c0 | 275 | unsigned long idr_index; |
e9ce1cd3 DM |
276 | |
277 | if (unlikely(!p)) | |
86062033 | 278 | return -ENOMEM; |
ec0595cc | 279 | p->tcfa_refcnt = 1; |
e9ce1cd3 | 280 | if (bind) |
ec0595cc | 281 | p->tcfa_bindcnt = 1; |
e9ce1cd3 | 282 | |
519c818e ED |
283 | if (cpustats) { |
284 | p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); | |
285 | if (!p->cpu_bstats) { | |
286 | err1: | |
287 | kfree(p); | |
288 | return err; | |
289 | } | |
290 | p->cpu_qstats = alloc_percpu(struct gnet_stats_queue); | |
291 | if (!p->cpu_qstats) { | |
292 | err2: | |
293 | free_percpu(p->cpu_bstats); | |
294 | goto err1; | |
295 | } | |
296 | } | |
ec0595cc | 297 | spin_lock_init(&p->tcfa_lock); |
65a206c0 CM |
298 | /* user doesn't specify an index */ |
299 | if (!index) { | |
2c8468dc | 300 | idr_preload(GFP_KERNEL); |
65a206c0 CM |
301 | spin_lock_bh(&idrinfo->lock); |
302 | err = idr_alloc_ext(idr, NULL, &idr_index, 1, 0, | |
2c8468dc | 303 | GFP_ATOMIC); |
65a206c0 | 304 | spin_unlock_bh(&idrinfo->lock); |
2c8468dc | 305 | idr_preload_end(); |
65a206c0 CM |
306 | if (err) { |
307 | err3: | |
308 | free_percpu(p->cpu_qstats); | |
309 | goto err2; | |
310 | } | |
311 | p->tcfa_index = idr_index; | |
312 | } else { | |
2c8468dc | 313 | idr_preload(GFP_KERNEL); |
65a206c0 CM |
314 | spin_lock_bh(&idrinfo->lock); |
315 | err = idr_alloc_ext(idr, NULL, NULL, index, index + 1, | |
2c8468dc | 316 | GFP_ATOMIC); |
65a206c0 | 317 | spin_unlock_bh(&idrinfo->lock); |
2c8468dc | 318 | idr_preload_end(); |
65a206c0 CM |
319 | if (err) |
320 | goto err3; | |
321 | p->tcfa_index = index; | |
322 | } | |
323 | ||
ec0595cc WC |
324 | p->tcfa_tm.install = jiffies; |
325 | p->tcfa_tm.lastuse = jiffies; | |
326 | p->tcfa_tm.firstuse = 0; | |
0e991ec6 | 327 | if (est) { |
ec0595cc WC |
328 | err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats, |
329 | &p->tcfa_rate_est, | |
330 | &p->tcfa_lock, NULL, est); | |
0e991ec6 | 331 | if (err) { |
65a206c0 | 332 | goto err3; |
0e991ec6 SH |
333 | } |
334 | } | |
335 | ||
65a206c0 | 336 | p->idrinfo = idrinfo; |
ec0595cc WC |
337 | p->ops = ops; |
338 | INIT_LIST_HEAD(&p->list); | |
339 | *a = p; | |
86062033 | 340 | return 0; |
e9ce1cd3 | 341 | } |
65a206c0 | 342 | EXPORT_SYMBOL(tcf_idr_create); |
e9ce1cd3 | 343 | |
65a206c0 | 344 | void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a) |
e9ce1cd3 | 345 | { |
65a206c0 | 346 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
e9ce1cd3 | 347 | |
65a206c0 CM |
348 | spin_lock_bh(&idrinfo->lock); |
349 | idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index); | |
350 | spin_unlock_bh(&idrinfo->lock); | |
e9ce1cd3 | 351 | } |
65a206c0 | 352 | EXPORT_SYMBOL(tcf_idr_insert); |
1da177e4 | 353 | |
65a206c0 CM |
354 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
355 | struct tcf_idrinfo *idrinfo) | |
1d4150c0 | 356 | { |
65a206c0 CM |
357 | struct idr *idr = &idrinfo->action_idr; |
358 | struct tc_action *p; | |
359 | int ret; | |
360 | unsigned long id = 1; | |
1d4150c0 | 361 | |
65a206c0 CM |
362 | idr_for_each_entry_ext(idr, p, id) { |
363 | ret = __tcf_idr_release(p, false, true); | |
364 | if (ret == ACT_P_DELETED) | |
365 | module_put(ops->owner); | |
366 | else if (ret < 0) | |
367 | return; | |
1d4150c0 | 368 | } |
65a206c0 | 369 | idr_destroy(&idrinfo->action_idr); |
1d4150c0 | 370 | } |
65a206c0 | 371 | EXPORT_SYMBOL(tcf_idrinfo_destroy); |
1d4150c0 | 372 | |
1f747c26 | 373 | static LIST_HEAD(act_base); |
1da177e4 LT |
374 | static DEFINE_RWLOCK(act_mod_lock); |
375 | ||
ddf97ccd WC |
376 | int tcf_register_action(struct tc_action_ops *act, |
377 | struct pernet_operations *ops) | |
1da177e4 | 378 | { |
1f747c26 | 379 | struct tc_action_ops *a; |
ddf97ccd | 380 | int ret; |
1da177e4 | 381 | |
ddf97ccd | 382 | if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup) |
76c82d7a JHS |
383 | return -EINVAL; |
384 | ||
ab102b80 WC |
385 | /* We have to register pernet ops before making the action ops visible, |
386 | * otherwise tcf_action_init_1() could get a partially initialized | |
387 | * netns. | |
388 | */ | |
389 | ret = register_pernet_subsys(ops); | |
390 | if (ret) | |
391 | return ret; | |
392 | ||
1da177e4 | 393 | write_lock(&act_mod_lock); |
1f747c26 | 394 | list_for_each_entry(a, &act_base, head) { |
1da177e4 LT |
395 | if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { |
396 | write_unlock(&act_mod_lock); | |
ab102b80 | 397 | unregister_pernet_subsys(ops); |
1da177e4 LT |
398 | return -EEXIST; |
399 | } | |
400 | } | |
1f747c26 | 401 | list_add_tail(&act->head, &act_base); |
1da177e4 | 402 | write_unlock(&act_mod_lock); |
ddf97ccd | 403 | |
1da177e4 LT |
404 | return 0; |
405 | } | |
62e3ba1b | 406 | EXPORT_SYMBOL(tcf_register_action); |
1da177e4 | 407 | |
ddf97ccd WC |
408 | int tcf_unregister_action(struct tc_action_ops *act, |
409 | struct pernet_operations *ops) | |
1da177e4 | 410 | { |
1f747c26 | 411 | struct tc_action_ops *a; |
1da177e4 LT |
412 | int err = -ENOENT; |
413 | ||
414 | write_lock(&act_mod_lock); | |
a792866a ED |
415 | list_for_each_entry(a, &act_base, head) { |
416 | if (a == act) { | |
417 | list_del(&act->head); | |
418 | err = 0; | |
1da177e4 | 419 | break; |
a792866a | 420 | } |
1da177e4 LT |
421 | } |
422 | write_unlock(&act_mod_lock); | |
ab102b80 WC |
423 | if (!err) |
424 | unregister_pernet_subsys(ops); | |
1da177e4 LT |
425 | return err; |
426 | } | |
62e3ba1b | 427 | EXPORT_SYMBOL(tcf_unregister_action); |
1da177e4 LT |
428 | |
429 | /* lookup by name */ | |
430 | static struct tc_action_ops *tc_lookup_action_n(char *kind) | |
431 | { | |
a792866a | 432 | struct tc_action_ops *a, *res = NULL; |
1da177e4 LT |
433 | |
434 | if (kind) { | |
435 | read_lock(&act_mod_lock); | |
1f747c26 | 436 | list_for_each_entry(a, &act_base, head) { |
1da177e4 | 437 | if (strcmp(kind, a->kind) == 0) { |
a792866a ED |
438 | if (try_module_get(a->owner)) |
439 | res = a; | |
1da177e4 LT |
440 | break; |
441 | } | |
442 | } | |
443 | read_unlock(&act_mod_lock); | |
444 | } | |
a792866a | 445 | return res; |
1da177e4 LT |
446 | } |
447 | ||
7ba699c6 PM |
448 | /* lookup by nlattr */ |
449 | static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) | |
1da177e4 | 450 | { |
a792866a | 451 | struct tc_action_ops *a, *res = NULL; |
1da177e4 LT |
452 | |
453 | if (kind) { | |
454 | read_lock(&act_mod_lock); | |
1f747c26 | 455 | list_for_each_entry(a, &act_base, head) { |
7ba699c6 | 456 | if (nla_strcmp(kind, a->kind) == 0) { |
a792866a ED |
457 | if (try_module_get(a->owner)) |
458 | res = a; | |
1da177e4 LT |
459 | break; |
460 | } | |
461 | } | |
462 | read_unlock(&act_mod_lock); | |
463 | } | |
a792866a | 464 | return res; |
1da177e4 | 465 | } |
1da177e4 | 466 | |
e0ee84de JHS |
467 | /*TCA_ACT_MAX_PRIO is 32, there count upto 32 */ |
468 | #define TCA_ACT_MAX_PRIO_MASK 0x1FF | |
22dc13c8 WC |
469 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
470 | int nr_actions, struct tcf_result *res) | |
1da177e4 | 471 | { |
e0ee84de JHS |
472 | u32 jmp_prgcnt = 0; |
473 | u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */ | |
ec1a9cca JP |
474 | int i; |
475 | int ret = TC_ACT_OK; | |
1da177e4 | 476 | |
e7246e12 WB |
477 | if (skb_skip_tc_classify(skb)) |
478 | return TC_ACT_OK; | |
479 | ||
e0ee84de | 480 | restart_act_graph: |
22dc13c8 WC |
481 | for (i = 0; i < nr_actions; i++) { |
482 | const struct tc_action *a = actions[i]; | |
483 | ||
e0ee84de JHS |
484 | if (jmp_prgcnt > 0) { |
485 | jmp_prgcnt -= 1; | |
486 | continue; | |
487 | } | |
1da177e4 | 488 | repeat: |
63acd680 | 489 | ret = a->ops->act(skb, a, res); |
63acd680 JHS |
490 | if (ret == TC_ACT_REPEAT) |
491 | goto repeat; /* we need a ttl - JHS */ | |
e0ee84de | 492 | |
9da3242e | 493 | if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) { |
e0ee84de JHS |
494 | jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK; |
495 | if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) { | |
496 | /* faulty opcode, stop pipeline */ | |
497 | return TC_ACT_OK; | |
498 | } else { | |
499 | jmp_ttl -= 1; | |
500 | if (jmp_ttl > 0) | |
501 | goto restart_act_graph; | |
502 | else /* faulty graph, stop pipeline */ | |
503 | return TC_ACT_OK; | |
504 | } | |
db50514f JP |
505 | } else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) { |
506 | tcf_action_goto_chain_exec(a, res); | |
e0ee84de JHS |
507 | } |
508 | ||
63acd680 | 509 | if (ret != TC_ACT_PIPE) |
e7246e12 | 510 | break; |
1da177e4 | 511 | } |
e0ee84de | 512 | |
1da177e4 LT |
513 | return ret; |
514 | } | |
62e3ba1b | 515 | EXPORT_SYMBOL(tcf_action_exec); |
1da177e4 | 516 | |
55334a5d | 517 | int tcf_action_destroy(struct list_head *actions, int bind) |
1da177e4 | 518 | { |
255cd50f | 519 | const struct tc_action_ops *ops; |
33be6271 | 520 | struct tc_action *a, *tmp; |
55334a5d | 521 | int ret = 0; |
1da177e4 | 522 | |
33be6271 | 523 | list_for_each_entry_safe(a, tmp, actions, list) { |
255cd50f | 524 | ops = a->ops; |
65a206c0 | 525 | ret = __tcf_idr_release(a, bind, true); |
55334a5d | 526 | if (ret == ACT_P_DELETED) |
255cd50f | 527 | module_put(ops->owner); |
55334a5d WC |
528 | else if (ret < 0) |
529 | return ret; | |
1da177e4 | 530 | } |
55334a5d | 531 | return ret; |
1da177e4 LT |
532 | } |
533 | ||
534 | int | |
535 | tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) | |
536 | { | |
1da177e4 LT |
537 | return a->ops->dump(skb, a, bind, ref); |
538 | } | |
539 | ||
540 | int | |
541 | tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) | |
542 | { | |
543 | int err = -EINVAL; | |
27a884dc | 544 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 545 | struct nlattr *nest; |
1da177e4 | 546 | |
1b34ec43 DM |
547 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
548 | goto nla_put_failure; | |
1da177e4 | 549 | if (tcf_action_copy_stats(skb, a, 0)) |
7ba699c6 | 550 | goto nla_put_failure; |
1045ba77 JHS |
551 | if (a->act_cookie) { |
552 | if (nla_put(skb, TCA_ACT_COOKIE, a->act_cookie->len, | |
553 | a->act_cookie->data)) | |
554 | goto nla_put_failure; | |
555 | } | |
556 | ||
4b3550ef PM |
557 | nest = nla_nest_start(skb, TCA_OPTIONS); |
558 | if (nest == NULL) | |
559 | goto nla_put_failure; | |
cc7ec456 ED |
560 | err = tcf_action_dump_old(skb, a, bind, ref); |
561 | if (err > 0) { | |
4b3550ef | 562 | nla_nest_end(skb, nest); |
1da177e4 LT |
563 | return err; |
564 | } | |
565 | ||
7ba699c6 | 566 | nla_put_failure: |
dc5fc579 | 567 | nlmsg_trim(skb, b); |
1da177e4 LT |
568 | return -1; |
569 | } | |
62e3ba1b | 570 | EXPORT_SYMBOL(tcf_action_dump_1); |
1da177e4 | 571 | |
0b0f43fe JHS |
572 | int tcf_action_dump(struct sk_buff *skb, struct list_head *actions, |
573 | int bind, int ref) | |
1da177e4 LT |
574 | { |
575 | struct tc_action *a; | |
576 | int err = -EINVAL; | |
4b3550ef | 577 | struct nlattr *nest; |
1da177e4 | 578 | |
33be6271 | 579 | list_for_each_entry(a, actions, list) { |
4b3550ef PM |
580 | nest = nla_nest_start(skb, a->order); |
581 | if (nest == NULL) | |
582 | goto nla_put_failure; | |
1da177e4 LT |
583 | err = tcf_action_dump_1(skb, a, bind, ref); |
584 | if (err < 0) | |
4fe683f5 | 585 | goto errout; |
4b3550ef | 586 | nla_nest_end(skb, nest); |
1da177e4 LT |
587 | } |
588 | ||
589 | return 0; | |
590 | ||
7ba699c6 | 591 | nla_put_failure: |
4fe683f5 TG |
592 | err = -EINVAL; |
593 | errout: | |
4b3550ef | 594 | nla_nest_cancel(skb, nest); |
4fe683f5 | 595 | return err; |
1da177e4 LT |
596 | } |
597 | ||
e0535ce5 | 598 | static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb) |
1045ba77 | 599 | { |
e0535ce5 WB |
600 | struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL); |
601 | if (!c) | |
602 | return NULL; | |
603 | ||
604 | c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL); | |
605 | if (!c->data) { | |
606 | kfree(c); | |
607 | return NULL; | |
1045ba77 | 608 | } |
e0535ce5 | 609 | c->len = nla_len(tb[TCA_ACT_COOKIE]); |
1045ba77 | 610 | |
e0535ce5 | 611 | return c; |
1045ba77 JHS |
612 | } |
613 | ||
9fb9f251 JP |
614 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
615 | struct nlattr *nla, struct nlattr *est, | |
616 | char *name, int ovr, int bind) | |
1da177e4 LT |
617 | { |
618 | struct tc_action *a; | |
619 | struct tc_action_ops *a_o; | |
e0535ce5 | 620 | struct tc_cookie *cookie = NULL; |
1da177e4 | 621 | char act_name[IFNAMSIZ]; |
cc7ec456 | 622 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
7ba699c6 | 623 | struct nlattr *kind; |
ab27cfb8 | 624 | int err; |
1da177e4 | 625 | |
1da177e4 | 626 | if (name == NULL) { |
fceb6435 | 627 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 628 | if (err < 0) |
1da177e4 | 629 | goto err_out; |
cee63723 | 630 | err = -EINVAL; |
7ba699c6 | 631 | kind = tb[TCA_ACT_KIND]; |
1da177e4 LT |
632 | if (kind == NULL) |
633 | goto err_out; | |
7ba699c6 | 634 | if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) |
1da177e4 | 635 | goto err_out; |
e0535ce5 WB |
636 | if (tb[TCA_ACT_COOKIE]) { |
637 | int cklen = nla_len(tb[TCA_ACT_COOKIE]); | |
638 | ||
639 | if (cklen > TC_COOKIE_MAX_SIZE) | |
640 | goto err_out; | |
641 | ||
642 | cookie = nla_memdup_cookie(tb); | |
643 | if (!cookie) { | |
644 | err = -ENOMEM; | |
645 | goto err_out; | |
646 | } | |
647 | } | |
1da177e4 | 648 | } else { |
cee63723 | 649 | err = -EINVAL; |
1da177e4 LT |
650 | if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) |
651 | goto err_out; | |
652 | } | |
653 | ||
654 | a_o = tc_lookup_action_n(act_name); | |
655 | if (a_o == NULL) { | |
95a5afca | 656 | #ifdef CONFIG_MODULES |
1da177e4 | 657 | rtnl_unlock(); |
4bba3925 | 658 | request_module("act_%s", act_name); |
1da177e4 LT |
659 | rtnl_lock(); |
660 | ||
661 | a_o = tc_lookup_action_n(act_name); | |
662 | ||
663 | /* We dropped the RTNL semaphore in order to | |
664 | * perform the module load. So, even if we | |
665 | * succeeded in loading the module we have to | |
666 | * tell the caller to replay the request. We | |
667 | * indicate this using -EAGAIN. | |
668 | */ | |
669 | if (a_o != NULL) { | |
ab27cfb8 | 670 | err = -EAGAIN; |
1da177e4 LT |
671 | goto err_mod; |
672 | } | |
673 | #endif | |
ab27cfb8 | 674 | err = -ENOENT; |
1da177e4 LT |
675 | goto err_out; |
676 | } | |
677 | ||
1da177e4 LT |
678 | /* backward compatibility for policer */ |
679 | if (name == NULL) | |
a85a970a | 680 | err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind); |
1da177e4 | 681 | else |
a85a970a | 682 | err = a_o->init(net, nla, est, &a, ovr, bind); |
ab27cfb8 | 683 | if (err < 0) |
a85a970a | 684 | goto err_mod; |
1da177e4 | 685 | |
e0535ce5 WB |
686 | if (name == NULL && tb[TCA_ACT_COOKIE]) { |
687 | if (a->act_cookie) { | |
688 | kfree(a->act_cookie->data); | |
689 | kfree(a->act_cookie); | |
1045ba77 | 690 | } |
e0535ce5 | 691 | a->act_cookie = cookie; |
1045ba77 JHS |
692 | } |
693 | ||
1da177e4 | 694 | /* module count goes up only when brand new policy is created |
cc7ec456 ED |
695 | * if it exists and is only bound to in a_o->init() then |
696 | * ACT_P_CREATED is not returned (a zero is). | |
697 | */ | |
ab27cfb8 | 698 | if (err != ACT_P_CREATED) |
1da177e4 | 699 | module_put(a_o->owner); |
1da177e4 | 700 | |
db50514f JP |
701 | if (TC_ACT_EXT_CMP(a->tcfa_action, TC_ACT_GOTO_CHAIN)) { |
702 | err = tcf_action_goto_chain_init(a, tp); | |
703 | if (err) { | |
704 | LIST_HEAD(actions); | |
705 | ||
706 | list_add_tail(&a->list, &actions); | |
707 | tcf_action_destroy(&actions, bind); | |
708 | return ERR_PTR(err); | |
709 | } | |
710 | } | |
711 | ||
1da177e4 LT |
712 | return a; |
713 | ||
1da177e4 LT |
714 | err_mod: |
715 | module_put(a_o->owner); | |
716 | err_out: | |
e0535ce5 WB |
717 | if (cookie) { |
718 | kfree(cookie->data); | |
719 | kfree(cookie); | |
720 | } | |
ab27cfb8 | 721 | return ERR_PTR(err); |
1da177e4 LT |
722 | } |
723 | ||
aecc5cef JHS |
724 | static void cleanup_a(struct list_head *actions, int ovr) |
725 | { | |
726 | struct tc_action *a; | |
727 | ||
728 | if (!ovr) | |
729 | return; | |
730 | ||
731 | list_for_each_entry(a, actions, list) | |
732 | a->tcfa_refcnt--; | |
733 | } | |
734 | ||
9fb9f251 JP |
735 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
736 | struct nlattr *est, char *name, int ovr, int bind, | |
737 | struct list_head *actions) | |
1da177e4 | 738 | { |
cc7ec456 | 739 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
33be6271 | 740 | struct tc_action *act; |
cee63723 | 741 | int err; |
1da177e4 LT |
742 | int i; |
743 | ||
fceb6435 | 744 | err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL); |
cee63723 | 745 | if (err < 0) |
33be6271 | 746 | return err; |
1da177e4 | 747 | |
7ba699c6 | 748 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
9fb9f251 | 749 | act = tcf_action_init_1(net, tp, tb[i], est, name, ovr, bind); |
33be6271 WC |
750 | if (IS_ERR(act)) { |
751 | err = PTR_ERR(act); | |
1da177e4 | 752 | goto err; |
33be6271 | 753 | } |
7ba699c6 | 754 | act->order = i; |
aecc5cef JHS |
755 | if (ovr) |
756 | act->tcfa_refcnt++; | |
33be6271 | 757 | list_add_tail(&act->list, actions); |
1da177e4 | 758 | } |
aecc5cef JHS |
759 | |
760 | /* Remove the temp refcnt which was necessary to protect against | |
761 | * destroying an existing action which was being replaced | |
762 | */ | |
763 | cleanup_a(actions, ovr); | |
33be6271 | 764 | return 0; |
1da177e4 LT |
765 | |
766 | err: | |
33be6271 WC |
767 | tcf_action_destroy(actions, bind); |
768 | return err; | |
1da177e4 LT |
769 | } |
770 | ||
ec0595cc | 771 | int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p, |
1da177e4 LT |
772 | int compat_mode) |
773 | { | |
774 | int err = 0; | |
775 | struct gnet_dump d; | |
10297b99 | 776 | |
7eb8896d | 777 | if (p == NULL) |
1da177e4 LT |
778 | goto errout; |
779 | ||
780 | /* compat_mode being true specifies a call that is supposed | |
06fe9fb4 | 781 | * to add additional backward compatibility statistic TLVs. |
1da177e4 LT |
782 | */ |
783 | if (compat_mode) { | |
ec0595cc | 784 | if (p->type == TCA_OLD_COMPAT) |
1da177e4 | 785 | err = gnet_stats_start_copy_compat(skb, 0, |
9854518e ND |
786 | TCA_STATS, |
787 | TCA_XSTATS, | |
ec0595cc | 788 | &p->tcfa_lock, &d, |
9854518e | 789 | TCA_PAD); |
1da177e4 LT |
790 | else |
791 | return 0; | |
792 | } else | |
793 | err = gnet_stats_start_copy(skb, TCA_ACT_STATS, | |
ec0595cc | 794 | &p->tcfa_lock, &d, TCA_ACT_PAD); |
1da177e4 LT |
795 | |
796 | if (err < 0) | |
797 | goto errout; | |
798 | ||
ec0595cc | 799 | if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 || |
1c0d32fd | 800 | gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 || |
519c818e | 801 | gnet_stats_copy_queue(&d, p->cpu_qstats, |
ec0595cc WC |
802 | &p->tcfa_qstats, |
803 | p->tcfa_qstats.qlen) < 0) | |
1da177e4 LT |
804 | goto errout; |
805 | ||
806 | if (gnet_stats_finish_copy(&d) < 0) | |
807 | goto errout; | |
808 | ||
809 | return 0; | |
810 | ||
811 | errout: | |
812 | return -1; | |
813 | } | |
814 | ||
0b0f43fe JHS |
815 | static int tca_get_fill(struct sk_buff *skb, struct list_head *actions, |
816 | u32 portid, u32 seq, u16 flags, int event, int bind, | |
817 | int ref) | |
1da177e4 LT |
818 | { |
819 | struct tcamsg *t; | |
820 | struct nlmsghdr *nlh; | |
27a884dc | 821 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 822 | struct nlattr *nest; |
1da177e4 | 823 | |
15e47304 | 824 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); |
8b00a53c DM |
825 | if (!nlh) |
826 | goto out_nlmsg_trim; | |
827 | t = nlmsg_data(nlh); | |
1da177e4 | 828 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
829 | t->tca__pad1 = 0; |
830 | t->tca__pad2 = 0; | |
10297b99 | 831 | |
4b3550ef PM |
832 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
833 | if (nest == NULL) | |
8b00a53c | 834 | goto out_nlmsg_trim; |
1da177e4 | 835 | |
33be6271 | 836 | if (tcf_action_dump(skb, actions, bind, ref) < 0) |
8b00a53c | 837 | goto out_nlmsg_trim; |
1da177e4 | 838 | |
4b3550ef | 839 | nla_nest_end(skb, nest); |
10297b99 | 840 | |
27a884dc | 841 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
842 | return skb->len; |
843 | ||
8b00a53c | 844 | out_nlmsg_trim: |
dc5fc579 | 845 | nlmsg_trim(skb, b); |
1da177e4 LT |
846 | return -1; |
847 | } | |
848 | ||
849 | static int | |
c4c4290c | 850 | tcf_get_notify(struct net *net, u32 portid, struct nlmsghdr *n, |
33be6271 | 851 | struct list_head *actions, int event) |
1da177e4 LT |
852 | { |
853 | struct sk_buff *skb; | |
1da177e4 LT |
854 | |
855 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
856 | if (!skb) | |
857 | return -ENOBUFS; | |
0b0f43fe JHS |
858 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, |
859 | 0, 0) <= 0) { | |
1da177e4 LT |
860 | kfree_skb(skb); |
861 | return -EINVAL; | |
862 | } | |
2942e900 | 863 | |
15e47304 | 864 | return rtnl_unicast(skb, net, portid); |
1da177e4 LT |
865 | } |
866 | ||
ddf97ccd WC |
867 | static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla, |
868 | struct nlmsghdr *n, u32 portid) | |
1da177e4 | 869 | { |
cc7ec456 | 870 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
a85a970a | 871 | const struct tc_action_ops *ops; |
1da177e4 LT |
872 | struct tc_action *a; |
873 | int index; | |
ab27cfb8 | 874 | int err; |
1da177e4 | 875 | |
fceb6435 | 876 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 877 | if (err < 0) |
ab27cfb8 | 878 | goto err_out; |
1da177e4 | 879 | |
cee63723 | 880 | err = -EINVAL; |
7ba699c6 PM |
881 | if (tb[TCA_ACT_INDEX] == NULL || |
882 | nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) | |
ab27cfb8 | 883 | goto err_out; |
1587bac4 | 884 | index = nla_get_u32(tb[TCA_ACT_INDEX]); |
1da177e4 | 885 | |
ab27cfb8 | 886 | err = -EINVAL; |
a85a970a WC |
887 | ops = tc_lookup_action(tb[TCA_ACT_KIND]); |
888 | if (!ops) /* could happen in batch of actions */ | |
889 | goto err_out; | |
ab27cfb8 | 890 | err = -ENOENT; |
a85a970a | 891 | if (ops->lookup(net, &a, index) == 0) |
1da177e4 LT |
892 | goto err_mod; |
893 | ||
a85a970a | 894 | module_put(ops->owner); |
1da177e4 | 895 | return a; |
ab27cfb8 | 896 | |
1da177e4 | 897 | err_mod: |
a85a970a | 898 | module_put(ops->owner); |
ab27cfb8 PM |
899 | err_out: |
900 | return ERR_PTR(err); | |
1da177e4 LT |
901 | } |
902 | ||
7316ae88 | 903 | static int tca_action_flush(struct net *net, struct nlattr *nla, |
15e47304 | 904 | struct nlmsghdr *n, u32 portid) |
1da177e4 LT |
905 | { |
906 | struct sk_buff *skb; | |
907 | unsigned char *b; | |
908 | struct nlmsghdr *nlh; | |
909 | struct tcamsg *t; | |
910 | struct netlink_callback dcb; | |
4b3550ef | 911 | struct nlattr *nest; |
cc7ec456 | 912 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
a85a970a | 913 | const struct tc_action_ops *ops; |
7ba699c6 | 914 | struct nlattr *kind; |
36723873 | 915 | int err = -ENOMEM; |
1da177e4 | 916 | |
1da177e4 LT |
917 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
918 | if (!skb) { | |
6ff9c364 | 919 | pr_debug("tca_action_flush: failed skb alloc\n"); |
36723873 | 920 | return err; |
1da177e4 LT |
921 | } |
922 | ||
27a884dc | 923 | b = skb_tail_pointer(skb); |
1da177e4 | 924 | |
fceb6435 | 925 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 926 | if (err < 0) |
1da177e4 LT |
927 | goto err_out; |
928 | ||
cee63723 | 929 | err = -EINVAL; |
7ba699c6 | 930 | kind = tb[TCA_ACT_KIND]; |
a85a970a WC |
931 | ops = tc_lookup_action(kind); |
932 | if (!ops) /*some idjot trying to flush unknown action */ | |
1da177e4 LT |
933 | goto err_out; |
934 | ||
0b0f43fe JHS |
935 | nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, |
936 | sizeof(*t), 0); | |
8b00a53c DM |
937 | if (!nlh) |
938 | goto out_module_put; | |
939 | t = nlmsg_data(nlh); | |
1da177e4 | 940 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
941 | t->tca__pad1 = 0; |
942 | t->tca__pad2 = 0; | |
1da177e4 | 943 | |
4b3550ef PM |
944 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
945 | if (nest == NULL) | |
8b00a53c | 946 | goto out_module_put; |
1da177e4 | 947 | |
a85a970a | 948 | err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops); |
edb9d1bf | 949 | if (err <= 0) |
8b00a53c | 950 | goto out_module_put; |
1da177e4 | 951 | |
4b3550ef | 952 | nla_nest_end(skb, nest); |
1da177e4 | 953 | |
27a884dc | 954 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 | 955 | nlh->nlmsg_flags |= NLM_F_ROOT; |
a85a970a | 956 | module_put(ops->owner); |
15e47304 | 957 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
cc7ec456 | 958 | n->nlmsg_flags & NLM_F_ECHO); |
1da177e4 LT |
959 | if (err > 0) |
960 | return 0; | |
961 | ||
962 | return err; | |
963 | ||
8b00a53c | 964 | out_module_put: |
a85a970a | 965 | module_put(ops->owner); |
1da177e4 LT |
966 | err_out: |
967 | kfree_skb(skb); | |
1da177e4 LT |
968 | return err; |
969 | } | |
970 | ||
a56e1953 WC |
971 | static int |
972 | tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, | |
973 | u32 portid) | |
974 | { | |
975 | int ret; | |
976 | struct sk_buff *skb; | |
977 | ||
978 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
979 | if (!skb) | |
980 | return -ENOBUFS; | |
981 | ||
982 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION, | |
983 | 0, 1) <= 0) { | |
984 | kfree_skb(skb); | |
985 | return -EINVAL; | |
986 | } | |
987 | ||
988 | /* now do the delete */ | |
55334a5d WC |
989 | ret = tcf_action_destroy(actions, 0); |
990 | if (ret < 0) { | |
991 | kfree_skb(skb); | |
992 | return ret; | |
993 | } | |
a56e1953 WC |
994 | |
995 | ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC, | |
996 | n->nlmsg_flags & NLM_F_ECHO); | |
997 | if (ret > 0) | |
998 | return 0; | |
999 | return ret; | |
1000 | } | |
1001 | ||
1da177e4 | 1002 | static int |
7316ae88 | 1003 | tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n, |
15e47304 | 1004 | u32 portid, int event) |
1da177e4 | 1005 | { |
cee63723 | 1006 | int i, ret; |
cc7ec456 | 1007 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
33be6271 WC |
1008 | struct tc_action *act; |
1009 | LIST_HEAD(actions); | |
1da177e4 | 1010 | |
fceb6435 | 1011 | ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL); |
cee63723 PM |
1012 | if (ret < 0) |
1013 | return ret; | |
1da177e4 | 1014 | |
cc7ec456 | 1015 | if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) { |
f97017cd | 1016 | if (tb[1] != NULL) |
15e47304 | 1017 | return tca_action_flush(net, tb[1], n, portid); |
f97017cd JHS |
1018 | else |
1019 | return -EINVAL; | |
1da177e4 LT |
1020 | } |
1021 | ||
7ba699c6 | 1022 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
ddf97ccd | 1023 | act = tcf_action_get_1(net, tb[i], n, portid); |
ab27cfb8 PM |
1024 | if (IS_ERR(act)) { |
1025 | ret = PTR_ERR(act); | |
1da177e4 | 1026 | goto err; |
ab27cfb8 | 1027 | } |
7ba699c6 | 1028 | act->order = i; |
33be6271 | 1029 | list_add_tail(&act->list, &actions); |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | if (event == RTM_GETACTION) | |
c4c4290c | 1033 | ret = tcf_get_notify(net, portid, n, &actions, event); |
1da177e4 | 1034 | else { /* delete */ |
a56e1953 WC |
1035 | ret = tcf_del_notify(net, n, &actions, portid); |
1036 | if (ret) | |
1da177e4 | 1037 | goto err; |
1da177e4 LT |
1038 | return ret; |
1039 | } | |
1040 | err: | |
0faa9cb5 JHS |
1041 | if (event != RTM_GETACTION) |
1042 | tcf_action_destroy(&actions, 0); | |
1da177e4 LT |
1043 | return ret; |
1044 | } | |
1045 | ||
a56e1953 WC |
1046 | static int |
1047 | tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, | |
1048 | u32 portid) | |
1da177e4 | 1049 | { |
1da177e4 | 1050 | struct sk_buff *skb; |
1da177e4 LT |
1051 | int err = 0; |
1052 | ||
1053 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1054 | if (!skb) | |
1055 | return -ENOBUFS; | |
1056 | ||
a56e1953 WC |
1057 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags, |
1058 | RTM_NEWACTION, 0, 0) <= 0) { | |
1059 | kfree_skb(skb); | |
1060 | return -EINVAL; | |
1061 | } | |
10297b99 | 1062 | |
a56e1953 WC |
1063 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
1064 | n->nlmsg_flags & NLM_F_ECHO); | |
1da177e4 LT |
1065 | if (err > 0) |
1066 | err = 0; | |
1067 | return err; | |
1da177e4 LT |
1068 | } |
1069 | ||
5a7a5555 JHS |
1070 | static int tcf_action_add(struct net *net, struct nlattr *nla, |
1071 | struct nlmsghdr *n, u32 portid, int ovr) | |
1da177e4 LT |
1072 | { |
1073 | int ret = 0; | |
33be6271 | 1074 | LIST_HEAD(actions); |
1da177e4 | 1075 | |
9fb9f251 | 1076 | ret = tcf_action_init(net, NULL, nla, NULL, NULL, ovr, 0, &actions); |
33be6271 | 1077 | if (ret) |
f07fed82 | 1078 | return ret; |
1da177e4 | 1079 | |
f07fed82 | 1080 | return tcf_add_notify(net, n, &actions, portid); |
1da177e4 LT |
1081 | } |
1082 | ||
90825b23 JHS |
1083 | static u32 tcaa_root_flags_allowed = TCA_FLAG_LARGE_DUMP_ON; |
1084 | static const struct nla_policy tcaa_policy[TCA_ROOT_MAX + 1] = { | |
1085 | [TCA_ROOT_FLAGS] = { .type = NLA_BITFIELD32, | |
1086 | .validation_data = &tcaa_root_flags_allowed }, | |
e62e484d | 1087 | [TCA_ROOT_TIME_DELTA] = { .type = NLA_U32 }, |
90825b23 JHS |
1088 | }; |
1089 | ||
c21ef3e3 DA |
1090 | static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, |
1091 | struct netlink_ext_ack *extack) | |
1da177e4 | 1092 | { |
3b1e0a65 | 1093 | struct net *net = sock_net(skb->sk); |
90825b23 | 1094 | struct nlattr *tca[TCA_ROOT_MAX + 1]; |
15e47304 | 1095 | u32 portid = skb ? NETLINK_CB(skb).portid : 0; |
1da177e4 LT |
1096 | int ret = 0, ovr = 0; |
1097 | ||
0b0f43fe JHS |
1098 | if ((n->nlmsg_type != RTM_GETACTION) && |
1099 | !netlink_capable(skb, CAP_NET_ADMIN)) | |
dfc47ef8 EB |
1100 | return -EPERM; |
1101 | ||
90825b23 | 1102 | ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ROOT_MAX, NULL, |
c21ef3e3 | 1103 | extack); |
7ba699c6 PM |
1104 | if (ret < 0) |
1105 | return ret; | |
1106 | ||
1107 | if (tca[TCA_ACT_TAB] == NULL) { | |
6ff9c364 | 1108 | pr_notice("tc_ctl_action: received NO action attribs\n"); |
1da177e4 LT |
1109 | return -EINVAL; |
1110 | } | |
1111 | ||
cc7ec456 | 1112 | /* n->nlmsg_flags & NLM_F_CREATE */ |
1da177e4 LT |
1113 | switch (n->nlmsg_type) { |
1114 | case RTM_NEWACTION: | |
1115 | /* we are going to assume all other flags | |
25985edc | 1116 | * imply create only if it doesn't exist |
1da177e4 LT |
1117 | * Note that CREATE | EXCL implies that |
1118 | * but since we want avoid ambiguity (eg when flags | |
1119 | * is zero) then just set this | |
1120 | */ | |
cc7ec456 | 1121 | if (n->nlmsg_flags & NLM_F_REPLACE) |
1da177e4 LT |
1122 | ovr = 1; |
1123 | replay: | |
15e47304 | 1124 | ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr); |
1da177e4 LT |
1125 | if (ret == -EAGAIN) |
1126 | goto replay; | |
1127 | break; | |
1128 | case RTM_DELACTION: | |
7316ae88 | 1129 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
15e47304 | 1130 | portid, RTM_DELACTION); |
1da177e4 LT |
1131 | break; |
1132 | case RTM_GETACTION: | |
7316ae88 | 1133 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
15e47304 | 1134 | portid, RTM_GETACTION); |
1da177e4 LT |
1135 | break; |
1136 | default: | |
1137 | BUG(); | |
1138 | } | |
1139 | ||
1140 | return ret; | |
1141 | } | |
1142 | ||
90825b23 | 1143 | static struct nlattr *find_dump_kind(struct nlattr **nla) |
1da177e4 | 1144 | { |
cc7ec456 | 1145 | struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1]; |
7ba699c6 | 1146 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
7ba699c6 | 1147 | struct nlattr *kind; |
1da177e4 | 1148 | |
7ba699c6 | 1149 | tb1 = nla[TCA_ACT_TAB]; |
1da177e4 LT |
1150 | if (tb1 == NULL) |
1151 | return NULL; | |
1152 | ||
7ba699c6 | 1153 | if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), |
fceb6435 | 1154 | NLMSG_ALIGN(nla_len(tb1)), NULL, NULL) < 0) |
1da177e4 | 1155 | return NULL; |
1da177e4 | 1156 | |
6d834e04 PM |
1157 | if (tb[1] == NULL) |
1158 | return NULL; | |
fceb6435 | 1159 | if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL, NULL) < 0) |
1da177e4 | 1160 | return NULL; |
7ba699c6 | 1161 | kind = tb2[TCA_ACT_KIND]; |
1da177e4 | 1162 | |
26dab893 | 1163 | return kind; |
1da177e4 LT |
1164 | } |
1165 | ||
5a7a5555 | 1166 | static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 1167 | { |
ddf97ccd | 1168 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1169 | struct nlmsghdr *nlh; |
27a884dc | 1170 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 1171 | struct nlattr *nest; |
1da177e4 | 1172 | struct tc_action_ops *a_o; |
1da177e4 | 1173 | int ret = 0; |
8b00a53c | 1174 | struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh); |
90825b23 JHS |
1175 | struct nlattr *tb[TCA_ROOT_MAX + 1]; |
1176 | struct nlattr *count_attr = NULL; | |
e62e484d | 1177 | unsigned long jiffy_since = 0; |
90825b23 JHS |
1178 | struct nlattr *kind = NULL; |
1179 | struct nla_bitfield32 bf; | |
e62e484d | 1180 | u32 msecs_since = 0; |
90825b23 JHS |
1181 | u32 act_count = 0; |
1182 | ||
1183 | ret = nlmsg_parse(cb->nlh, sizeof(struct tcamsg), tb, TCA_ROOT_MAX, | |
1184 | tcaa_policy, NULL); | |
1185 | if (ret < 0) | |
1186 | return ret; | |
1da177e4 | 1187 | |
90825b23 | 1188 | kind = find_dump_kind(tb); |
1da177e4 | 1189 | if (kind == NULL) { |
6ff9c364 | 1190 | pr_info("tc_dump_action: action bad kind\n"); |
1da177e4 LT |
1191 | return 0; |
1192 | } | |
1193 | ||
26dab893 | 1194 | a_o = tc_lookup_action(kind); |
cc7ec456 | 1195 | if (a_o == NULL) |
1da177e4 | 1196 | return 0; |
1da177e4 | 1197 | |
90825b23 JHS |
1198 | cb->args[2] = 0; |
1199 | if (tb[TCA_ROOT_FLAGS]) { | |
1200 | bf = nla_get_bitfield32(tb[TCA_ROOT_FLAGS]); | |
1201 | cb->args[2] = bf.value; | |
1202 | } | |
1203 | ||
e62e484d JHS |
1204 | if (tb[TCA_ROOT_TIME_DELTA]) { |
1205 | msecs_since = nla_get_u32(tb[TCA_ROOT_TIME_DELTA]); | |
1206 | } | |
1207 | ||
15e47304 | 1208 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
8b00a53c DM |
1209 | cb->nlh->nlmsg_type, sizeof(*t), 0); |
1210 | if (!nlh) | |
1211 | goto out_module_put; | |
90825b23 | 1212 | |
e62e484d JHS |
1213 | if (msecs_since) |
1214 | jiffy_since = jiffies - msecs_to_jiffies(msecs_since); | |
1215 | ||
8b00a53c | 1216 | t = nlmsg_data(nlh); |
1da177e4 | 1217 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
1218 | t->tca__pad1 = 0; |
1219 | t->tca__pad2 = 0; | |
e62e484d | 1220 | cb->args[3] = jiffy_since; |
90825b23 JHS |
1221 | count_attr = nla_reserve(skb, TCA_ROOT_COUNT, sizeof(u32)); |
1222 | if (!count_attr) | |
1223 | goto out_module_put; | |
1da177e4 | 1224 | |
4b3550ef PM |
1225 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
1226 | if (nest == NULL) | |
8b00a53c | 1227 | goto out_module_put; |
1da177e4 | 1228 | |
a85a970a | 1229 | ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o); |
1da177e4 | 1230 | if (ret < 0) |
8b00a53c | 1231 | goto out_module_put; |
1da177e4 LT |
1232 | |
1233 | if (ret > 0) { | |
4b3550ef | 1234 | nla_nest_end(skb, nest); |
1da177e4 | 1235 | ret = skb->len; |
90825b23 JHS |
1236 | act_count = cb->args[1]; |
1237 | memcpy(nla_data(count_attr), &act_count, sizeof(u32)); | |
1238 | cb->args[1] = 0; | |
1da177e4 | 1239 | } else |
ebecaa66 | 1240 | nlmsg_trim(skb, b); |
1da177e4 | 1241 | |
27a884dc | 1242 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
15e47304 | 1243 | if (NETLINK_CB(cb->skb).portid && ret) |
1da177e4 LT |
1244 | nlh->nlmsg_flags |= NLM_F_MULTI; |
1245 | module_put(a_o->owner); | |
1246 | return skb->len; | |
1247 | ||
8b00a53c | 1248 | out_module_put: |
1da177e4 | 1249 | module_put(a_o->owner); |
dc5fc579 | 1250 | nlmsg_trim(skb, b); |
1da177e4 LT |
1251 | return skb->len; |
1252 | } | |
1253 | ||
b3f55bdd JP |
1254 | struct tcf_action_net { |
1255 | struct rhashtable egdev_ht; | |
1256 | }; | |
1257 | ||
1258 | static unsigned int tcf_action_net_id; | |
1259 | ||
1260 | struct tcf_action_egdev_cb { | |
1261 | struct list_head list; | |
1262 | tc_setup_cb_t *cb; | |
1263 | void *cb_priv; | |
1264 | }; | |
1265 | ||
1266 | struct tcf_action_egdev { | |
1267 | struct rhash_head ht_node; | |
1268 | const struct net_device *dev; | |
1269 | unsigned int refcnt; | |
1270 | struct list_head cb_list; | |
1271 | }; | |
1272 | ||
1273 | static const struct rhashtable_params tcf_action_egdev_ht_params = { | |
1274 | .key_offset = offsetof(struct tcf_action_egdev, dev), | |
1275 | .head_offset = offsetof(struct tcf_action_egdev, ht_node), | |
1276 | .key_len = sizeof(const struct net_device *), | |
1277 | }; | |
1278 | ||
1279 | static struct tcf_action_egdev * | |
1280 | tcf_action_egdev_lookup(const struct net_device *dev) | |
1281 | { | |
1282 | struct net *net = dev_net(dev); | |
1283 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1284 | ||
1285 | return rhashtable_lookup_fast(&tan->egdev_ht, &dev, | |
1286 | tcf_action_egdev_ht_params); | |
1287 | } | |
1288 | ||
1289 | static struct tcf_action_egdev * | |
1290 | tcf_action_egdev_get(const struct net_device *dev) | |
1291 | { | |
1292 | struct tcf_action_egdev *egdev; | |
1293 | struct tcf_action_net *tan; | |
1294 | ||
1295 | egdev = tcf_action_egdev_lookup(dev); | |
1296 | if (egdev) | |
1297 | goto inc_ref; | |
1298 | ||
1299 | egdev = kzalloc(sizeof(*egdev), GFP_KERNEL); | |
1300 | if (!egdev) | |
1301 | return NULL; | |
1302 | INIT_LIST_HEAD(&egdev->cb_list); | |
0843c092 | 1303 | egdev->dev = dev; |
b3f55bdd JP |
1304 | tan = net_generic(dev_net(dev), tcf_action_net_id); |
1305 | rhashtable_insert_fast(&tan->egdev_ht, &egdev->ht_node, | |
1306 | tcf_action_egdev_ht_params); | |
1307 | ||
1308 | inc_ref: | |
1309 | egdev->refcnt++; | |
1310 | return egdev; | |
1311 | } | |
1312 | ||
1313 | static void tcf_action_egdev_put(struct tcf_action_egdev *egdev) | |
1314 | { | |
1315 | struct tcf_action_net *tan; | |
1316 | ||
1317 | if (--egdev->refcnt) | |
1318 | return; | |
1319 | tan = net_generic(dev_net(egdev->dev), tcf_action_net_id); | |
1320 | rhashtable_remove_fast(&tan->egdev_ht, &egdev->ht_node, | |
1321 | tcf_action_egdev_ht_params); | |
1322 | kfree(egdev); | |
1323 | } | |
1324 | ||
1325 | static struct tcf_action_egdev_cb * | |
1326 | tcf_action_egdev_cb_lookup(struct tcf_action_egdev *egdev, | |
1327 | tc_setup_cb_t *cb, void *cb_priv) | |
1328 | { | |
1329 | struct tcf_action_egdev_cb *egdev_cb; | |
1330 | ||
1331 | list_for_each_entry(egdev_cb, &egdev->cb_list, list) | |
1332 | if (egdev_cb->cb == cb && egdev_cb->cb_priv == cb_priv) | |
1333 | return egdev_cb; | |
1334 | return NULL; | |
1335 | } | |
1336 | ||
1337 | static int tcf_action_egdev_cb_call(struct tcf_action_egdev *egdev, | |
1338 | enum tc_setup_type type, | |
1339 | void *type_data, bool err_stop) | |
1340 | { | |
1341 | struct tcf_action_egdev_cb *egdev_cb; | |
1342 | int ok_count = 0; | |
1343 | int err; | |
1344 | ||
1345 | list_for_each_entry(egdev_cb, &egdev->cb_list, list) { | |
1346 | err = egdev_cb->cb(type, type_data, egdev_cb->cb_priv); | |
1347 | if (err) { | |
1348 | if (err_stop) | |
1349 | return err; | |
1350 | } else { | |
1351 | ok_count++; | |
1352 | } | |
1353 | } | |
1354 | return ok_count; | |
1355 | } | |
1356 | ||
1357 | static int tcf_action_egdev_cb_add(struct tcf_action_egdev *egdev, | |
1358 | tc_setup_cb_t *cb, void *cb_priv) | |
1359 | { | |
1360 | struct tcf_action_egdev_cb *egdev_cb; | |
1361 | ||
1362 | egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv); | |
1363 | if (WARN_ON(egdev_cb)) | |
1364 | return -EEXIST; | |
1365 | egdev_cb = kzalloc(sizeof(*egdev_cb), GFP_KERNEL); | |
1366 | if (!egdev_cb) | |
1367 | return -ENOMEM; | |
1368 | egdev_cb->cb = cb; | |
1369 | egdev_cb->cb_priv = cb_priv; | |
1370 | list_add(&egdev_cb->list, &egdev->cb_list); | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static void tcf_action_egdev_cb_del(struct tcf_action_egdev *egdev, | |
1375 | tc_setup_cb_t *cb, void *cb_priv) | |
1376 | { | |
1377 | struct tcf_action_egdev_cb *egdev_cb; | |
1378 | ||
1379 | egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv); | |
1380 | if (WARN_ON(!egdev_cb)) | |
1381 | return; | |
1382 | list_del(&egdev_cb->list); | |
1383 | kfree(egdev_cb); | |
1384 | } | |
1385 | ||
1386 | static int __tc_setup_cb_egdev_register(const struct net_device *dev, | |
1387 | tc_setup_cb_t *cb, void *cb_priv) | |
1388 | { | |
1389 | struct tcf_action_egdev *egdev = tcf_action_egdev_get(dev); | |
1390 | int err; | |
1391 | ||
1392 | if (!egdev) | |
1393 | return -ENOMEM; | |
1394 | err = tcf_action_egdev_cb_add(egdev, cb, cb_priv); | |
1395 | if (err) | |
1396 | goto err_cb_add; | |
1397 | return 0; | |
1398 | ||
1399 | err_cb_add: | |
1400 | tcf_action_egdev_put(egdev); | |
1401 | return err; | |
1402 | } | |
1403 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
1404 | tc_setup_cb_t *cb, void *cb_priv) | |
1405 | { | |
1406 | int err; | |
1407 | ||
1408 | rtnl_lock(); | |
1409 | err = __tc_setup_cb_egdev_register(dev, cb, cb_priv); | |
1410 | rtnl_unlock(); | |
1411 | return err; | |
1412 | } | |
1413 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_register); | |
1414 | ||
1415 | static void __tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
1416 | tc_setup_cb_t *cb, void *cb_priv) | |
1417 | { | |
1418 | struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev); | |
1419 | ||
1420 | if (WARN_ON(!egdev)) | |
1421 | return; | |
1422 | tcf_action_egdev_cb_del(egdev, cb, cb_priv); | |
1423 | tcf_action_egdev_put(egdev); | |
1424 | } | |
1425 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
1426 | tc_setup_cb_t *cb, void *cb_priv) | |
1427 | { | |
1428 | rtnl_lock(); | |
1429 | __tc_setup_cb_egdev_unregister(dev, cb, cb_priv); | |
1430 | rtnl_unlock(); | |
1431 | } | |
1432 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_unregister); | |
1433 | ||
1434 | int tc_setup_cb_egdev_call(const struct net_device *dev, | |
1435 | enum tc_setup_type type, void *type_data, | |
1436 | bool err_stop) | |
1437 | { | |
1438 | struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev); | |
1439 | ||
1440 | if (!egdev) | |
1441 | return 0; | |
1442 | return tcf_action_egdev_cb_call(egdev, type, type_data, err_stop); | |
1443 | } | |
1444 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_call); | |
1445 | ||
1446 | static __net_init int tcf_action_net_init(struct net *net) | |
1447 | { | |
1448 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1449 | ||
1450 | return rhashtable_init(&tan->egdev_ht, &tcf_action_egdev_ht_params); | |
1451 | } | |
1452 | ||
1453 | static void __net_exit tcf_action_net_exit(struct net *net) | |
1454 | { | |
1455 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1456 | ||
1457 | rhashtable_destroy(&tan->egdev_ht); | |
1458 | } | |
1459 | ||
1460 | static struct pernet_operations tcf_action_net_ops = { | |
1461 | .init = tcf_action_net_init, | |
1462 | .exit = tcf_action_net_exit, | |
1463 | .id = &tcf_action_net_id, | |
1464 | .size = sizeof(struct tcf_action_net), | |
1465 | }; | |
1466 | ||
1da177e4 LT |
1467 | static int __init tc_action_init(void) |
1468 | { | |
b3f55bdd JP |
1469 | int err; |
1470 | ||
1471 | err = register_pernet_subsys(&tcf_action_net_ops); | |
1472 | if (err) | |
1473 | return err; | |
1474 | ||
b97bac64 FW |
1475 | rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, 0); |
1476 | rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, 0); | |
c7ac8679 | 1477 | rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action, |
b97bac64 | 1478 | 0); |
1da177e4 | 1479 | |
1da177e4 LT |
1480 | return 0; |
1481 | } | |
1482 | ||
1483 | subsys_initcall(tc_action_init); |