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Commit | Line | Data |
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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 | ||
a159d3c4 CW |
91 | ASSERT_RTNL(); |
92 | ||
e9ce1cd3 DM |
93 | if (p) { |
94 | if (bind) | |
ec0595cc WC |
95 | p->tcfa_bindcnt--; |
96 | else if (strict && p->tcfa_bindcnt > 0) | |
55334a5d | 97 | return -EPERM; |
e9ce1cd3 | 98 | |
ec0595cc WC |
99 | p->tcfa_refcnt--; |
100 | if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) { | |
101 | if (p->ops->cleanup) | |
102 | p->ops->cleanup(p, bind); | |
65a206c0 | 103 | tcf_idr_remove(p->idrinfo, p); |
1d4150c0 | 104 | ret = ACT_P_DELETED; |
e9ce1cd3 DM |
105 | } |
106 | } | |
28e6b67f | 107 | |
e9ce1cd3 DM |
108 | return ret; |
109 | } | |
65a206c0 | 110 | EXPORT_SYMBOL(__tcf_idr_release); |
e9ce1cd3 | 111 | |
65a206c0 | 112 | static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, |
a85a970a | 113 | struct netlink_callback *cb) |
e9ce1cd3 | 114 | { |
65a206c0 | 115 | int err = 0, index = -1, s_i = 0, n_i = 0; |
90825b23 | 116 | u32 act_flags = cb->args[2]; |
e62e484d | 117 | unsigned long jiffy_since = cb->args[3]; |
4b3550ef | 118 | struct nlattr *nest; |
65a206c0 CM |
119 | struct idr *idr = &idrinfo->action_idr; |
120 | struct tc_action *p; | |
121 | unsigned long id = 1; | |
e9ce1cd3 | 122 | |
65a206c0 | 123 | spin_lock_bh(&idrinfo->lock); |
e9ce1cd3 DM |
124 | |
125 | s_i = cb->args[0]; | |
126 | ||
65a206c0 CM |
127 | idr_for_each_entry_ext(idr, p, id) { |
128 | index++; | |
129 | if (index < s_i) | |
130 | continue; | |
131 | ||
132 | if (jiffy_since && | |
133 | time_after(jiffy_since, | |
134 | (unsigned long)p->tcfa_tm.lastuse)) | |
135 | continue; | |
136 | ||
137 | nest = nla_nest_start(skb, n_i); | |
77f69d1f CD |
138 | if (!nest) { |
139 | index--; | |
65a206c0 | 140 | goto nla_put_failure; |
77f69d1f | 141 | } |
65a206c0 CM |
142 | err = tcf_action_dump_1(skb, p, 0, 0); |
143 | if (err < 0) { | |
144 | index--; | |
145 | nlmsg_trim(skb, nest); | |
146 | goto done; | |
e9ce1cd3 | 147 | } |
65a206c0 CM |
148 | nla_nest_end(skb, nest); |
149 | n_i++; | |
150 | if (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) && | |
151 | n_i >= TCA_ACT_MAX_PRIO) | |
152 | goto done; | |
e9ce1cd3 DM |
153 | } |
154 | done: | |
e62e484d JHS |
155 | if (index >= 0) |
156 | cb->args[0] = index + 1; | |
157 | ||
65a206c0 | 158 | spin_unlock_bh(&idrinfo->lock); |
90825b23 | 159 | if (n_i) { |
90825b23 JHS |
160 | if (act_flags & TCA_FLAG_LARGE_DUMP_ON) |
161 | cb->args[1] = n_i; | |
162 | } | |
e9ce1cd3 DM |
163 | return n_i; |
164 | ||
7ba699c6 | 165 | nla_put_failure: |
4b3550ef | 166 | nla_nest_cancel(skb, nest); |
e9ce1cd3 DM |
167 | goto done; |
168 | } | |
169 | ||
65a206c0 | 170 | static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, |
a85a970a | 171 | const struct tc_action_ops *ops) |
e9ce1cd3 | 172 | { |
4b3550ef | 173 | struct nlattr *nest; |
65a206c0 | 174 | int n_i = 0; |
55334a5d | 175 | int ret = -EINVAL; |
65a206c0 CM |
176 | struct idr *idr = &idrinfo->action_idr; |
177 | struct tc_action *p; | |
178 | unsigned long id = 1; | |
e9ce1cd3 | 179 | |
a85a970a | 180 | nest = nla_nest_start(skb, 0); |
4b3550ef PM |
181 | if (nest == NULL) |
182 | goto nla_put_failure; | |
a85a970a | 183 | if (nla_put_string(skb, TCA_KIND, ops->kind)) |
1b34ec43 | 184 | goto nla_put_failure; |
65a206c0 CM |
185 | |
186 | idr_for_each_entry_ext(idr, p, id) { | |
187 | ret = __tcf_idr_release(p, false, true); | |
188 | if (ret == ACT_P_DELETED) { | |
255cd50f | 189 | module_put(ops->owner); |
65a206c0 CM |
190 | n_i++; |
191 | } else if (ret < 0) { | |
192 | goto nla_put_failure; | |
e9ce1cd3 DM |
193 | } |
194 | } | |
1b34ec43 DM |
195 | if (nla_put_u32(skb, TCA_FCNT, n_i)) |
196 | goto nla_put_failure; | |
4b3550ef | 197 | nla_nest_end(skb, nest); |
e9ce1cd3 DM |
198 | |
199 | return n_i; | |
7ba699c6 | 200 | nla_put_failure: |
4b3550ef | 201 | nla_nest_cancel(skb, nest); |
55334a5d | 202 | return ret; |
e9ce1cd3 DM |
203 | } |
204 | ||
ddf97ccd WC |
205 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, |
206 | struct netlink_callback *cb, int type, | |
a85a970a | 207 | const struct tc_action_ops *ops) |
e9ce1cd3 | 208 | { |
65a206c0 | 209 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
ddf97ccd | 210 | |
e9ce1cd3 | 211 | if (type == RTM_DELACTION) { |
65a206c0 | 212 | return tcf_del_walker(idrinfo, skb, ops); |
e9ce1cd3 | 213 | } else if (type == RTM_GETACTION) { |
65a206c0 | 214 | return tcf_dump_walker(idrinfo, skb, cb); |
e9ce1cd3 | 215 | } else { |
6ff9c364 | 216 | WARN(1, "tcf_generic_walker: unknown action %d\n", type); |
e9ce1cd3 DM |
217 | return -EINVAL; |
218 | } | |
219 | } | |
ddf97ccd | 220 | EXPORT_SYMBOL(tcf_generic_walker); |
e9ce1cd3 | 221 | |
65a206c0 | 222 | static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo) |
e9ce1cd3 | 223 | { |
ec0595cc | 224 | struct tc_action *p = NULL; |
e9ce1cd3 | 225 | |
65a206c0 CM |
226 | spin_lock_bh(&idrinfo->lock); |
227 | p = idr_find_ext(&idrinfo->action_idr, index); | |
228 | spin_unlock_bh(&idrinfo->lock); | |
e9ce1cd3 DM |
229 | |
230 | return p; | |
231 | } | |
e9ce1cd3 | 232 | |
65a206c0 | 233 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index) |
e9ce1cd3 | 234 | { |
65a206c0 CM |
235 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
236 | struct tc_action *p = tcf_idr_lookup(index, idrinfo); | |
e9ce1cd3 DM |
237 | |
238 | if (p) { | |
ec0595cc | 239 | *a = p; |
e9ce1cd3 DM |
240 | return 1; |
241 | } | |
242 | return 0; | |
243 | } | |
65a206c0 | 244 | EXPORT_SYMBOL(tcf_idr_search); |
e9ce1cd3 | 245 | |
65a206c0 CM |
246 | bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, |
247 | int bind) | |
e9ce1cd3 | 248 | { |
65a206c0 CM |
249 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
250 | struct tc_action *p = tcf_idr_lookup(index, idrinfo); | |
ec0595cc | 251 | |
65a206c0 | 252 | if (index && p) { |
76aab2c1 | 253 | if (bind) |
ec0595cc WC |
254 | p->tcfa_bindcnt++; |
255 | p->tcfa_refcnt++; | |
256 | *a = p; | |
b2313077 | 257 | return true; |
e9ce1cd3 | 258 | } |
b2313077 | 259 | return false; |
e9ce1cd3 | 260 | } |
65a206c0 | 261 | EXPORT_SYMBOL(tcf_idr_check); |
e9ce1cd3 | 262 | |
65a206c0 | 263 | void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est) |
86062033 | 264 | { |
86062033 | 265 | if (est) |
1c0d32fd | 266 | gen_kill_estimator(&a->tcfa_rate_est); |
d7fb60b9 | 267 | free_tcf(a); |
86062033 | 268 | } |
65a206c0 | 269 | EXPORT_SYMBOL(tcf_idr_cleanup); |
86062033 | 270 | |
65a206c0 CM |
271 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
272 | struct tc_action **a, const struct tc_action_ops *ops, | |
273 | int bind, bool cpustats) | |
e9ce1cd3 | 274 | { |
ec0595cc | 275 | struct tc_action *p = kzalloc(ops->size, GFP_KERNEL); |
65a206c0 CM |
276 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
277 | struct idr *idr = &idrinfo->action_idr; | |
519c818e | 278 | int err = -ENOMEM; |
65a206c0 | 279 | unsigned long idr_index; |
e9ce1cd3 DM |
280 | |
281 | if (unlikely(!p)) | |
86062033 | 282 | return -ENOMEM; |
ec0595cc | 283 | p->tcfa_refcnt = 1; |
e9ce1cd3 | 284 | if (bind) |
ec0595cc | 285 | p->tcfa_bindcnt = 1; |
e9ce1cd3 | 286 | |
519c818e ED |
287 | if (cpustats) { |
288 | p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); | |
289 | if (!p->cpu_bstats) { | |
290 | err1: | |
291 | kfree(p); | |
292 | return err; | |
293 | } | |
294 | p->cpu_qstats = alloc_percpu(struct gnet_stats_queue); | |
295 | if (!p->cpu_qstats) { | |
296 | err2: | |
297 | free_percpu(p->cpu_bstats); | |
298 | goto err1; | |
299 | } | |
300 | } | |
ec0595cc | 301 | spin_lock_init(&p->tcfa_lock); |
65a206c0 CM |
302 | /* user doesn't specify an index */ |
303 | if (!index) { | |
2c8468dc | 304 | idr_preload(GFP_KERNEL); |
65a206c0 CM |
305 | spin_lock_bh(&idrinfo->lock); |
306 | err = idr_alloc_ext(idr, NULL, &idr_index, 1, 0, | |
2c8468dc | 307 | GFP_ATOMIC); |
65a206c0 | 308 | spin_unlock_bh(&idrinfo->lock); |
2c8468dc | 309 | idr_preload_end(); |
65a206c0 CM |
310 | if (err) { |
311 | err3: | |
312 | free_percpu(p->cpu_qstats); | |
313 | goto err2; | |
314 | } | |
315 | p->tcfa_index = idr_index; | |
316 | } else { | |
2c8468dc | 317 | idr_preload(GFP_KERNEL); |
65a206c0 CM |
318 | spin_lock_bh(&idrinfo->lock); |
319 | err = idr_alloc_ext(idr, NULL, NULL, index, index + 1, | |
2c8468dc | 320 | GFP_ATOMIC); |
65a206c0 | 321 | spin_unlock_bh(&idrinfo->lock); |
2c8468dc | 322 | idr_preload_end(); |
65a206c0 CM |
323 | if (err) |
324 | goto err3; | |
325 | p->tcfa_index = index; | |
326 | } | |
327 | ||
ec0595cc WC |
328 | p->tcfa_tm.install = jiffies; |
329 | p->tcfa_tm.lastuse = jiffies; | |
330 | p->tcfa_tm.firstuse = 0; | |
0e991ec6 | 331 | if (est) { |
ec0595cc WC |
332 | err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats, |
333 | &p->tcfa_rate_est, | |
334 | &p->tcfa_lock, NULL, est); | |
0e991ec6 | 335 | if (err) { |
65a206c0 | 336 | goto err3; |
0e991ec6 SH |
337 | } |
338 | } | |
339 | ||
65a206c0 | 340 | p->idrinfo = idrinfo; |
ec0595cc WC |
341 | p->ops = ops; |
342 | INIT_LIST_HEAD(&p->list); | |
343 | *a = p; | |
86062033 | 344 | return 0; |
e9ce1cd3 | 345 | } |
65a206c0 | 346 | EXPORT_SYMBOL(tcf_idr_create); |
e9ce1cd3 | 347 | |
65a206c0 | 348 | void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a) |
e9ce1cd3 | 349 | { |
65a206c0 | 350 | struct tcf_idrinfo *idrinfo = tn->idrinfo; |
e9ce1cd3 | 351 | |
65a206c0 CM |
352 | spin_lock_bh(&idrinfo->lock); |
353 | idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index); | |
354 | spin_unlock_bh(&idrinfo->lock); | |
e9ce1cd3 | 355 | } |
65a206c0 | 356 | EXPORT_SYMBOL(tcf_idr_insert); |
1da177e4 | 357 | |
65a206c0 CM |
358 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
359 | struct tcf_idrinfo *idrinfo) | |
1d4150c0 | 360 | { |
65a206c0 CM |
361 | struct idr *idr = &idrinfo->action_idr; |
362 | struct tc_action *p; | |
363 | int ret; | |
364 | unsigned long id = 1; | |
1d4150c0 | 365 | |
65a206c0 CM |
366 | idr_for_each_entry_ext(idr, p, id) { |
367 | ret = __tcf_idr_release(p, false, true); | |
368 | if (ret == ACT_P_DELETED) | |
369 | module_put(ops->owner); | |
370 | else if (ret < 0) | |
371 | return; | |
1d4150c0 | 372 | } |
65a206c0 | 373 | idr_destroy(&idrinfo->action_idr); |
1d4150c0 | 374 | } |
65a206c0 | 375 | EXPORT_SYMBOL(tcf_idrinfo_destroy); |
1d4150c0 | 376 | |
1f747c26 | 377 | static LIST_HEAD(act_base); |
1da177e4 LT |
378 | static DEFINE_RWLOCK(act_mod_lock); |
379 | ||
ddf97ccd WC |
380 | int tcf_register_action(struct tc_action_ops *act, |
381 | struct pernet_operations *ops) | |
1da177e4 | 382 | { |
1f747c26 | 383 | struct tc_action_ops *a; |
ddf97ccd | 384 | int ret; |
1da177e4 | 385 | |
ddf97ccd | 386 | if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup) |
76c82d7a JHS |
387 | return -EINVAL; |
388 | ||
ab102b80 WC |
389 | /* We have to register pernet ops before making the action ops visible, |
390 | * otherwise tcf_action_init_1() could get a partially initialized | |
391 | * netns. | |
392 | */ | |
393 | ret = register_pernet_subsys(ops); | |
394 | if (ret) | |
395 | return ret; | |
396 | ||
1da177e4 | 397 | write_lock(&act_mod_lock); |
1f747c26 | 398 | list_for_each_entry(a, &act_base, head) { |
1da177e4 LT |
399 | if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { |
400 | write_unlock(&act_mod_lock); | |
ab102b80 | 401 | unregister_pernet_subsys(ops); |
1da177e4 LT |
402 | return -EEXIST; |
403 | } | |
404 | } | |
1f747c26 | 405 | list_add_tail(&act->head, &act_base); |
1da177e4 | 406 | write_unlock(&act_mod_lock); |
ddf97ccd | 407 | |
1da177e4 LT |
408 | return 0; |
409 | } | |
62e3ba1b | 410 | EXPORT_SYMBOL(tcf_register_action); |
1da177e4 | 411 | |
ddf97ccd WC |
412 | int tcf_unregister_action(struct tc_action_ops *act, |
413 | struct pernet_operations *ops) | |
1da177e4 | 414 | { |
1f747c26 | 415 | struct tc_action_ops *a; |
1da177e4 LT |
416 | int err = -ENOENT; |
417 | ||
418 | write_lock(&act_mod_lock); | |
a792866a ED |
419 | list_for_each_entry(a, &act_base, head) { |
420 | if (a == act) { | |
421 | list_del(&act->head); | |
422 | err = 0; | |
1da177e4 | 423 | break; |
a792866a | 424 | } |
1da177e4 LT |
425 | } |
426 | write_unlock(&act_mod_lock); | |
ab102b80 WC |
427 | if (!err) |
428 | unregister_pernet_subsys(ops); | |
1da177e4 LT |
429 | return err; |
430 | } | |
62e3ba1b | 431 | EXPORT_SYMBOL(tcf_unregister_action); |
1da177e4 LT |
432 | |
433 | /* lookup by name */ | |
434 | static struct tc_action_ops *tc_lookup_action_n(char *kind) | |
435 | { | |
a792866a | 436 | struct tc_action_ops *a, *res = NULL; |
1da177e4 LT |
437 | |
438 | if (kind) { | |
439 | read_lock(&act_mod_lock); | |
1f747c26 | 440 | list_for_each_entry(a, &act_base, head) { |
1da177e4 | 441 | if (strcmp(kind, a->kind) == 0) { |
a792866a ED |
442 | if (try_module_get(a->owner)) |
443 | res = a; | |
1da177e4 LT |
444 | break; |
445 | } | |
446 | } | |
447 | read_unlock(&act_mod_lock); | |
448 | } | |
a792866a | 449 | return res; |
1da177e4 LT |
450 | } |
451 | ||
7ba699c6 PM |
452 | /* lookup by nlattr */ |
453 | static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) | |
1da177e4 | 454 | { |
a792866a | 455 | struct tc_action_ops *a, *res = NULL; |
1da177e4 LT |
456 | |
457 | if (kind) { | |
458 | read_lock(&act_mod_lock); | |
1f747c26 | 459 | list_for_each_entry(a, &act_base, head) { |
7ba699c6 | 460 | if (nla_strcmp(kind, a->kind) == 0) { |
a792866a ED |
461 | if (try_module_get(a->owner)) |
462 | res = a; | |
1da177e4 LT |
463 | break; |
464 | } | |
465 | } | |
466 | read_unlock(&act_mod_lock); | |
467 | } | |
a792866a | 468 | return res; |
1da177e4 | 469 | } |
1da177e4 | 470 | |
e0ee84de JHS |
471 | /*TCA_ACT_MAX_PRIO is 32, there count upto 32 */ |
472 | #define TCA_ACT_MAX_PRIO_MASK 0x1FF | |
22dc13c8 WC |
473 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
474 | int nr_actions, struct tcf_result *res) | |
1da177e4 | 475 | { |
e0ee84de JHS |
476 | u32 jmp_prgcnt = 0; |
477 | u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */ | |
ec1a9cca JP |
478 | int i; |
479 | int ret = TC_ACT_OK; | |
1da177e4 | 480 | |
e7246e12 WB |
481 | if (skb_skip_tc_classify(skb)) |
482 | return TC_ACT_OK; | |
483 | ||
e0ee84de | 484 | restart_act_graph: |
22dc13c8 WC |
485 | for (i = 0; i < nr_actions; i++) { |
486 | const struct tc_action *a = actions[i]; | |
487 | ||
e0ee84de JHS |
488 | if (jmp_prgcnt > 0) { |
489 | jmp_prgcnt -= 1; | |
490 | continue; | |
491 | } | |
1da177e4 | 492 | repeat: |
63acd680 | 493 | ret = a->ops->act(skb, a, res); |
63acd680 JHS |
494 | if (ret == TC_ACT_REPEAT) |
495 | goto repeat; /* we need a ttl - JHS */ | |
e0ee84de | 496 | |
9da3242e | 497 | if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) { |
e0ee84de JHS |
498 | jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK; |
499 | if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) { | |
500 | /* faulty opcode, stop pipeline */ | |
501 | return TC_ACT_OK; | |
502 | } else { | |
503 | jmp_ttl -= 1; | |
504 | if (jmp_ttl > 0) | |
505 | goto restart_act_graph; | |
506 | else /* faulty graph, stop pipeline */ | |
507 | return TC_ACT_OK; | |
508 | } | |
db50514f JP |
509 | } else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) { |
510 | tcf_action_goto_chain_exec(a, res); | |
e0ee84de JHS |
511 | } |
512 | ||
63acd680 | 513 | if (ret != TC_ACT_PIPE) |
e7246e12 | 514 | break; |
1da177e4 | 515 | } |
e0ee84de | 516 | |
1da177e4 LT |
517 | return ret; |
518 | } | |
62e3ba1b | 519 | EXPORT_SYMBOL(tcf_action_exec); |
1da177e4 | 520 | |
55334a5d | 521 | int tcf_action_destroy(struct list_head *actions, int bind) |
1da177e4 | 522 | { |
255cd50f | 523 | const struct tc_action_ops *ops; |
33be6271 | 524 | struct tc_action *a, *tmp; |
55334a5d | 525 | int ret = 0; |
1da177e4 | 526 | |
33be6271 | 527 | list_for_each_entry_safe(a, tmp, actions, list) { |
255cd50f | 528 | ops = a->ops; |
65a206c0 | 529 | ret = __tcf_idr_release(a, bind, true); |
55334a5d | 530 | if (ret == ACT_P_DELETED) |
255cd50f | 531 | module_put(ops->owner); |
55334a5d WC |
532 | else if (ret < 0) |
533 | return ret; | |
1da177e4 | 534 | } |
55334a5d | 535 | return ret; |
1da177e4 LT |
536 | } |
537 | ||
538 | int | |
539 | tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) | |
540 | { | |
1da177e4 LT |
541 | return a->ops->dump(skb, a, bind, ref); |
542 | } | |
543 | ||
544 | int | |
545 | tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) | |
546 | { | |
547 | int err = -EINVAL; | |
27a884dc | 548 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 549 | struct nlattr *nest; |
1da177e4 | 550 | |
1b34ec43 DM |
551 | if (nla_put_string(skb, TCA_KIND, a->ops->kind)) |
552 | goto nla_put_failure; | |
1da177e4 | 553 | if (tcf_action_copy_stats(skb, a, 0)) |
7ba699c6 | 554 | goto nla_put_failure; |
1045ba77 JHS |
555 | if (a->act_cookie) { |
556 | if (nla_put(skb, TCA_ACT_COOKIE, a->act_cookie->len, | |
557 | a->act_cookie->data)) | |
558 | goto nla_put_failure; | |
559 | } | |
560 | ||
4b3550ef PM |
561 | nest = nla_nest_start(skb, TCA_OPTIONS); |
562 | if (nest == NULL) | |
563 | goto nla_put_failure; | |
cc7ec456 ED |
564 | err = tcf_action_dump_old(skb, a, bind, ref); |
565 | if (err > 0) { | |
4b3550ef | 566 | nla_nest_end(skb, nest); |
1da177e4 LT |
567 | return err; |
568 | } | |
569 | ||
7ba699c6 | 570 | nla_put_failure: |
dc5fc579 | 571 | nlmsg_trim(skb, b); |
1da177e4 LT |
572 | return -1; |
573 | } | |
62e3ba1b | 574 | EXPORT_SYMBOL(tcf_action_dump_1); |
1da177e4 | 575 | |
0b0f43fe JHS |
576 | int tcf_action_dump(struct sk_buff *skb, struct list_head *actions, |
577 | int bind, int ref) | |
1da177e4 LT |
578 | { |
579 | struct tc_action *a; | |
580 | int err = -EINVAL; | |
4b3550ef | 581 | struct nlattr *nest; |
1da177e4 | 582 | |
33be6271 | 583 | list_for_each_entry(a, actions, list) { |
4b3550ef PM |
584 | nest = nla_nest_start(skb, a->order); |
585 | if (nest == NULL) | |
586 | goto nla_put_failure; | |
1da177e4 LT |
587 | err = tcf_action_dump_1(skb, a, bind, ref); |
588 | if (err < 0) | |
4fe683f5 | 589 | goto errout; |
4b3550ef | 590 | nla_nest_end(skb, nest); |
1da177e4 LT |
591 | } |
592 | ||
593 | return 0; | |
594 | ||
7ba699c6 | 595 | nla_put_failure: |
4fe683f5 TG |
596 | err = -EINVAL; |
597 | errout: | |
4b3550ef | 598 | nla_nest_cancel(skb, nest); |
4fe683f5 | 599 | return err; |
1da177e4 LT |
600 | } |
601 | ||
e0535ce5 | 602 | static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb) |
1045ba77 | 603 | { |
e0535ce5 WB |
604 | struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL); |
605 | if (!c) | |
606 | return NULL; | |
607 | ||
608 | c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL); | |
609 | if (!c->data) { | |
610 | kfree(c); | |
611 | return NULL; | |
1045ba77 | 612 | } |
e0535ce5 | 613 | c->len = nla_len(tb[TCA_ACT_COOKIE]); |
1045ba77 | 614 | |
e0535ce5 | 615 | return c; |
1045ba77 JHS |
616 | } |
617 | ||
9fb9f251 JP |
618 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
619 | struct nlattr *nla, struct nlattr *est, | |
620 | char *name, int ovr, int bind) | |
1da177e4 LT |
621 | { |
622 | struct tc_action *a; | |
623 | struct tc_action_ops *a_o; | |
e0535ce5 | 624 | struct tc_cookie *cookie = NULL; |
1da177e4 | 625 | char act_name[IFNAMSIZ]; |
cc7ec456 | 626 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
7ba699c6 | 627 | struct nlattr *kind; |
ab27cfb8 | 628 | int err; |
1da177e4 | 629 | |
1da177e4 | 630 | if (name == NULL) { |
fceb6435 | 631 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 632 | if (err < 0) |
1da177e4 | 633 | goto err_out; |
cee63723 | 634 | err = -EINVAL; |
7ba699c6 | 635 | kind = tb[TCA_ACT_KIND]; |
1da177e4 LT |
636 | if (kind == NULL) |
637 | goto err_out; | |
7ba699c6 | 638 | if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) |
1da177e4 | 639 | goto err_out; |
e0535ce5 WB |
640 | if (tb[TCA_ACT_COOKIE]) { |
641 | int cklen = nla_len(tb[TCA_ACT_COOKIE]); | |
642 | ||
643 | if (cklen > TC_COOKIE_MAX_SIZE) | |
644 | goto err_out; | |
645 | ||
646 | cookie = nla_memdup_cookie(tb); | |
647 | if (!cookie) { | |
648 | err = -ENOMEM; | |
649 | goto err_out; | |
650 | } | |
651 | } | |
1da177e4 | 652 | } else { |
cee63723 | 653 | err = -EINVAL; |
1da177e4 LT |
654 | if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) |
655 | goto err_out; | |
656 | } | |
657 | ||
658 | a_o = tc_lookup_action_n(act_name); | |
659 | if (a_o == NULL) { | |
95a5afca | 660 | #ifdef CONFIG_MODULES |
1da177e4 | 661 | rtnl_unlock(); |
4bba3925 | 662 | request_module("act_%s", act_name); |
1da177e4 LT |
663 | rtnl_lock(); |
664 | ||
665 | a_o = tc_lookup_action_n(act_name); | |
666 | ||
667 | /* We dropped the RTNL semaphore in order to | |
668 | * perform the module load. So, even if we | |
669 | * succeeded in loading the module we have to | |
670 | * tell the caller to replay the request. We | |
671 | * indicate this using -EAGAIN. | |
672 | */ | |
673 | if (a_o != NULL) { | |
ab27cfb8 | 674 | err = -EAGAIN; |
1da177e4 LT |
675 | goto err_mod; |
676 | } | |
677 | #endif | |
ab27cfb8 | 678 | err = -ENOENT; |
1da177e4 LT |
679 | goto err_out; |
680 | } | |
681 | ||
1da177e4 LT |
682 | /* backward compatibility for policer */ |
683 | if (name == NULL) | |
a85a970a | 684 | err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind); |
1da177e4 | 685 | else |
a85a970a | 686 | err = a_o->init(net, nla, est, &a, ovr, bind); |
ab27cfb8 | 687 | if (err < 0) |
a85a970a | 688 | goto err_mod; |
1da177e4 | 689 | |
e0535ce5 WB |
690 | if (name == NULL && tb[TCA_ACT_COOKIE]) { |
691 | if (a->act_cookie) { | |
692 | kfree(a->act_cookie->data); | |
693 | kfree(a->act_cookie); | |
1045ba77 | 694 | } |
e0535ce5 | 695 | a->act_cookie = cookie; |
1045ba77 JHS |
696 | } |
697 | ||
1da177e4 | 698 | /* module count goes up only when brand new policy is created |
cc7ec456 ED |
699 | * if it exists and is only bound to in a_o->init() then |
700 | * ACT_P_CREATED is not returned (a zero is). | |
701 | */ | |
ab27cfb8 | 702 | if (err != ACT_P_CREATED) |
1da177e4 | 703 | module_put(a_o->owner); |
1da177e4 | 704 | |
db50514f JP |
705 | if (TC_ACT_EXT_CMP(a->tcfa_action, TC_ACT_GOTO_CHAIN)) { |
706 | err = tcf_action_goto_chain_init(a, tp); | |
707 | if (err) { | |
708 | LIST_HEAD(actions); | |
709 | ||
710 | list_add_tail(&a->list, &actions); | |
711 | tcf_action_destroy(&actions, bind); | |
712 | return ERR_PTR(err); | |
713 | } | |
714 | } | |
715 | ||
1da177e4 LT |
716 | return a; |
717 | ||
1da177e4 LT |
718 | err_mod: |
719 | module_put(a_o->owner); | |
720 | err_out: | |
e0535ce5 WB |
721 | if (cookie) { |
722 | kfree(cookie->data); | |
723 | kfree(cookie); | |
724 | } | |
ab27cfb8 | 725 | return ERR_PTR(err); |
1da177e4 LT |
726 | } |
727 | ||
aecc5cef JHS |
728 | static void cleanup_a(struct list_head *actions, int ovr) |
729 | { | |
730 | struct tc_action *a; | |
731 | ||
732 | if (!ovr) | |
733 | return; | |
734 | ||
735 | list_for_each_entry(a, actions, list) | |
736 | a->tcfa_refcnt--; | |
737 | } | |
738 | ||
9fb9f251 JP |
739 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
740 | struct nlattr *est, char *name, int ovr, int bind, | |
741 | struct list_head *actions) | |
1da177e4 | 742 | { |
cc7ec456 | 743 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
33be6271 | 744 | struct tc_action *act; |
cee63723 | 745 | int err; |
1da177e4 LT |
746 | int i; |
747 | ||
fceb6435 | 748 | err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL); |
cee63723 | 749 | if (err < 0) |
33be6271 | 750 | return err; |
1da177e4 | 751 | |
7ba699c6 | 752 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
9fb9f251 | 753 | act = tcf_action_init_1(net, tp, tb[i], est, name, ovr, bind); |
33be6271 WC |
754 | if (IS_ERR(act)) { |
755 | err = PTR_ERR(act); | |
1da177e4 | 756 | goto err; |
33be6271 | 757 | } |
7ba699c6 | 758 | act->order = i; |
aecc5cef JHS |
759 | if (ovr) |
760 | act->tcfa_refcnt++; | |
33be6271 | 761 | list_add_tail(&act->list, actions); |
1da177e4 | 762 | } |
aecc5cef JHS |
763 | |
764 | /* Remove the temp refcnt which was necessary to protect against | |
765 | * destroying an existing action which was being replaced | |
766 | */ | |
767 | cleanup_a(actions, ovr); | |
33be6271 | 768 | return 0; |
1da177e4 LT |
769 | |
770 | err: | |
33be6271 WC |
771 | tcf_action_destroy(actions, bind); |
772 | return err; | |
1da177e4 LT |
773 | } |
774 | ||
ec0595cc | 775 | int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p, |
1da177e4 LT |
776 | int compat_mode) |
777 | { | |
778 | int err = 0; | |
779 | struct gnet_dump d; | |
10297b99 | 780 | |
7eb8896d | 781 | if (p == NULL) |
1da177e4 LT |
782 | goto errout; |
783 | ||
784 | /* compat_mode being true specifies a call that is supposed | |
06fe9fb4 | 785 | * to add additional backward compatibility statistic TLVs. |
1da177e4 LT |
786 | */ |
787 | if (compat_mode) { | |
ec0595cc | 788 | if (p->type == TCA_OLD_COMPAT) |
1da177e4 | 789 | err = gnet_stats_start_copy_compat(skb, 0, |
9854518e ND |
790 | TCA_STATS, |
791 | TCA_XSTATS, | |
ec0595cc | 792 | &p->tcfa_lock, &d, |
9854518e | 793 | TCA_PAD); |
1da177e4 LT |
794 | else |
795 | return 0; | |
796 | } else | |
797 | err = gnet_stats_start_copy(skb, TCA_ACT_STATS, | |
ec0595cc | 798 | &p->tcfa_lock, &d, TCA_ACT_PAD); |
1da177e4 LT |
799 | |
800 | if (err < 0) | |
801 | goto errout; | |
802 | ||
ec0595cc | 803 | if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 || |
1c0d32fd | 804 | gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 || |
519c818e | 805 | gnet_stats_copy_queue(&d, p->cpu_qstats, |
ec0595cc WC |
806 | &p->tcfa_qstats, |
807 | p->tcfa_qstats.qlen) < 0) | |
1da177e4 LT |
808 | goto errout; |
809 | ||
810 | if (gnet_stats_finish_copy(&d) < 0) | |
811 | goto errout; | |
812 | ||
813 | return 0; | |
814 | ||
815 | errout: | |
816 | return -1; | |
817 | } | |
818 | ||
0b0f43fe JHS |
819 | static int tca_get_fill(struct sk_buff *skb, struct list_head *actions, |
820 | u32 portid, u32 seq, u16 flags, int event, int bind, | |
821 | int ref) | |
1da177e4 LT |
822 | { |
823 | struct tcamsg *t; | |
824 | struct nlmsghdr *nlh; | |
27a884dc | 825 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 826 | struct nlattr *nest; |
1da177e4 | 827 | |
15e47304 | 828 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); |
8b00a53c DM |
829 | if (!nlh) |
830 | goto out_nlmsg_trim; | |
831 | t = nlmsg_data(nlh); | |
1da177e4 | 832 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
833 | t->tca__pad1 = 0; |
834 | t->tca__pad2 = 0; | |
10297b99 | 835 | |
4b3550ef PM |
836 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
837 | if (nest == NULL) | |
8b00a53c | 838 | goto out_nlmsg_trim; |
1da177e4 | 839 | |
33be6271 | 840 | if (tcf_action_dump(skb, actions, bind, ref) < 0) |
8b00a53c | 841 | goto out_nlmsg_trim; |
1da177e4 | 842 | |
4b3550ef | 843 | nla_nest_end(skb, nest); |
10297b99 | 844 | |
27a884dc | 845 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 LT |
846 | return skb->len; |
847 | ||
8b00a53c | 848 | out_nlmsg_trim: |
dc5fc579 | 849 | nlmsg_trim(skb, b); |
1da177e4 LT |
850 | return -1; |
851 | } | |
852 | ||
853 | static int | |
c4c4290c | 854 | tcf_get_notify(struct net *net, u32 portid, struct nlmsghdr *n, |
33be6271 | 855 | struct list_head *actions, int event) |
1da177e4 LT |
856 | { |
857 | struct sk_buff *skb; | |
1da177e4 LT |
858 | |
859 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
860 | if (!skb) | |
861 | return -ENOBUFS; | |
0b0f43fe JHS |
862 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, |
863 | 0, 0) <= 0) { | |
1da177e4 LT |
864 | kfree_skb(skb); |
865 | return -EINVAL; | |
866 | } | |
2942e900 | 867 | |
15e47304 | 868 | return rtnl_unicast(skb, net, portid); |
1da177e4 LT |
869 | } |
870 | ||
ddf97ccd WC |
871 | static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla, |
872 | struct nlmsghdr *n, u32 portid) | |
1da177e4 | 873 | { |
cc7ec456 | 874 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
a85a970a | 875 | const struct tc_action_ops *ops; |
1da177e4 LT |
876 | struct tc_action *a; |
877 | int index; | |
ab27cfb8 | 878 | int err; |
1da177e4 | 879 | |
fceb6435 | 880 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 881 | if (err < 0) |
ab27cfb8 | 882 | goto err_out; |
1da177e4 | 883 | |
cee63723 | 884 | err = -EINVAL; |
7ba699c6 PM |
885 | if (tb[TCA_ACT_INDEX] == NULL || |
886 | nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) | |
ab27cfb8 | 887 | goto err_out; |
1587bac4 | 888 | index = nla_get_u32(tb[TCA_ACT_INDEX]); |
1da177e4 | 889 | |
ab27cfb8 | 890 | err = -EINVAL; |
a85a970a WC |
891 | ops = tc_lookup_action(tb[TCA_ACT_KIND]); |
892 | if (!ops) /* could happen in batch of actions */ | |
893 | goto err_out; | |
ab27cfb8 | 894 | err = -ENOENT; |
a85a970a | 895 | if (ops->lookup(net, &a, index) == 0) |
1da177e4 LT |
896 | goto err_mod; |
897 | ||
a85a970a | 898 | module_put(ops->owner); |
1da177e4 | 899 | return a; |
ab27cfb8 | 900 | |
1da177e4 | 901 | err_mod: |
a85a970a | 902 | module_put(ops->owner); |
ab27cfb8 PM |
903 | err_out: |
904 | return ERR_PTR(err); | |
1da177e4 LT |
905 | } |
906 | ||
7316ae88 | 907 | static int tca_action_flush(struct net *net, struct nlattr *nla, |
15e47304 | 908 | struct nlmsghdr *n, u32 portid) |
1da177e4 LT |
909 | { |
910 | struct sk_buff *skb; | |
911 | unsigned char *b; | |
912 | struct nlmsghdr *nlh; | |
913 | struct tcamsg *t; | |
914 | struct netlink_callback dcb; | |
4b3550ef | 915 | struct nlattr *nest; |
cc7ec456 | 916 | struct nlattr *tb[TCA_ACT_MAX + 1]; |
a85a970a | 917 | const struct tc_action_ops *ops; |
7ba699c6 | 918 | struct nlattr *kind; |
36723873 | 919 | int err = -ENOMEM; |
1da177e4 | 920 | |
1da177e4 LT |
921 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
922 | if (!skb) { | |
6ff9c364 | 923 | pr_debug("tca_action_flush: failed skb alloc\n"); |
36723873 | 924 | return err; |
1da177e4 LT |
925 | } |
926 | ||
27a884dc | 927 | b = skb_tail_pointer(skb); |
1da177e4 | 928 | |
fceb6435 | 929 | err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL); |
cee63723 | 930 | if (err < 0) |
1da177e4 LT |
931 | goto err_out; |
932 | ||
cee63723 | 933 | err = -EINVAL; |
7ba699c6 | 934 | kind = tb[TCA_ACT_KIND]; |
a85a970a WC |
935 | ops = tc_lookup_action(kind); |
936 | if (!ops) /*some idjot trying to flush unknown action */ | |
1da177e4 LT |
937 | goto err_out; |
938 | ||
0b0f43fe JHS |
939 | nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, |
940 | sizeof(*t), 0); | |
8b00a53c DM |
941 | if (!nlh) |
942 | goto out_module_put; | |
943 | t = nlmsg_data(nlh); | |
1da177e4 | 944 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
945 | t->tca__pad1 = 0; |
946 | t->tca__pad2 = 0; | |
1da177e4 | 947 | |
4b3550ef PM |
948 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
949 | if (nest == NULL) | |
8b00a53c | 950 | goto out_module_put; |
1da177e4 | 951 | |
a85a970a | 952 | err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops); |
edb9d1bf | 953 | if (err <= 0) |
8b00a53c | 954 | goto out_module_put; |
1da177e4 | 955 | |
4b3550ef | 956 | nla_nest_end(skb, nest); |
1da177e4 | 957 | |
27a884dc | 958 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4 | 959 | nlh->nlmsg_flags |= NLM_F_ROOT; |
a85a970a | 960 | module_put(ops->owner); |
15e47304 | 961 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
cc7ec456 | 962 | n->nlmsg_flags & NLM_F_ECHO); |
1da177e4 LT |
963 | if (err > 0) |
964 | return 0; | |
965 | ||
966 | return err; | |
967 | ||
8b00a53c | 968 | out_module_put: |
a85a970a | 969 | module_put(ops->owner); |
1da177e4 LT |
970 | err_out: |
971 | kfree_skb(skb); | |
1da177e4 LT |
972 | return err; |
973 | } | |
974 | ||
a56e1953 WC |
975 | static int |
976 | tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, | |
977 | u32 portid) | |
978 | { | |
979 | int ret; | |
980 | struct sk_buff *skb; | |
981 | ||
982 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
983 | if (!skb) | |
984 | return -ENOBUFS; | |
985 | ||
986 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION, | |
987 | 0, 1) <= 0) { | |
988 | kfree_skb(skb); | |
989 | return -EINVAL; | |
990 | } | |
991 | ||
992 | /* now do the delete */ | |
55334a5d WC |
993 | ret = tcf_action_destroy(actions, 0); |
994 | if (ret < 0) { | |
995 | kfree_skb(skb); | |
996 | return ret; | |
997 | } | |
a56e1953 WC |
998 | |
999 | ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC, | |
1000 | n->nlmsg_flags & NLM_F_ECHO); | |
1001 | if (ret > 0) | |
1002 | return 0; | |
1003 | return ret; | |
1004 | } | |
1005 | ||
1da177e4 | 1006 | static int |
7316ae88 | 1007 | tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n, |
15e47304 | 1008 | u32 portid, int event) |
1da177e4 | 1009 | { |
cee63723 | 1010 | int i, ret; |
cc7ec456 | 1011 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
33be6271 WC |
1012 | struct tc_action *act; |
1013 | LIST_HEAD(actions); | |
1da177e4 | 1014 | |
fceb6435 | 1015 | ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL); |
cee63723 PM |
1016 | if (ret < 0) |
1017 | return ret; | |
1da177e4 | 1018 | |
cc7ec456 | 1019 | if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) { |
f97017cd | 1020 | if (tb[1] != NULL) |
15e47304 | 1021 | return tca_action_flush(net, tb[1], n, portid); |
f97017cd JHS |
1022 | else |
1023 | return -EINVAL; | |
1da177e4 LT |
1024 | } |
1025 | ||
7ba699c6 | 1026 | for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { |
ddf97ccd | 1027 | act = tcf_action_get_1(net, tb[i], n, portid); |
ab27cfb8 PM |
1028 | if (IS_ERR(act)) { |
1029 | ret = PTR_ERR(act); | |
1da177e4 | 1030 | goto err; |
ab27cfb8 | 1031 | } |
7ba699c6 | 1032 | act->order = i; |
33be6271 | 1033 | list_add_tail(&act->list, &actions); |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | if (event == RTM_GETACTION) | |
c4c4290c | 1037 | ret = tcf_get_notify(net, portid, n, &actions, event); |
1da177e4 | 1038 | else { /* delete */ |
a56e1953 WC |
1039 | ret = tcf_del_notify(net, n, &actions, portid); |
1040 | if (ret) | |
1da177e4 | 1041 | goto err; |
1da177e4 LT |
1042 | return ret; |
1043 | } | |
1044 | err: | |
0faa9cb5 JHS |
1045 | if (event != RTM_GETACTION) |
1046 | tcf_action_destroy(&actions, 0); | |
1da177e4 LT |
1047 | return ret; |
1048 | } | |
1049 | ||
a56e1953 WC |
1050 | static int |
1051 | tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, | |
1052 | u32 portid) | |
1da177e4 | 1053 | { |
1da177e4 | 1054 | struct sk_buff *skb; |
1da177e4 LT |
1055 | int err = 0; |
1056 | ||
1057 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1058 | if (!skb) | |
1059 | return -ENOBUFS; | |
1060 | ||
a56e1953 WC |
1061 | if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags, |
1062 | RTM_NEWACTION, 0, 0) <= 0) { | |
1063 | kfree_skb(skb); | |
1064 | return -EINVAL; | |
1065 | } | |
10297b99 | 1066 | |
a56e1953 WC |
1067 | err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, |
1068 | n->nlmsg_flags & NLM_F_ECHO); | |
1da177e4 LT |
1069 | if (err > 0) |
1070 | err = 0; | |
1071 | return err; | |
1da177e4 LT |
1072 | } |
1073 | ||
5a7a5555 JHS |
1074 | static int tcf_action_add(struct net *net, struct nlattr *nla, |
1075 | struct nlmsghdr *n, u32 portid, int ovr) | |
1da177e4 LT |
1076 | { |
1077 | int ret = 0; | |
33be6271 | 1078 | LIST_HEAD(actions); |
1da177e4 | 1079 | |
9fb9f251 | 1080 | ret = tcf_action_init(net, NULL, nla, NULL, NULL, ovr, 0, &actions); |
33be6271 | 1081 | if (ret) |
f07fed82 | 1082 | return ret; |
1da177e4 | 1083 | |
f07fed82 | 1084 | return tcf_add_notify(net, n, &actions, portid); |
1da177e4 LT |
1085 | } |
1086 | ||
90825b23 JHS |
1087 | static u32 tcaa_root_flags_allowed = TCA_FLAG_LARGE_DUMP_ON; |
1088 | static const struct nla_policy tcaa_policy[TCA_ROOT_MAX + 1] = { | |
1089 | [TCA_ROOT_FLAGS] = { .type = NLA_BITFIELD32, | |
1090 | .validation_data = &tcaa_root_flags_allowed }, | |
e62e484d | 1091 | [TCA_ROOT_TIME_DELTA] = { .type = NLA_U32 }, |
90825b23 JHS |
1092 | }; |
1093 | ||
c21ef3e3 DA |
1094 | static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, |
1095 | struct netlink_ext_ack *extack) | |
1da177e4 | 1096 | { |
3b1e0a65 | 1097 | struct net *net = sock_net(skb->sk); |
90825b23 | 1098 | struct nlattr *tca[TCA_ROOT_MAX + 1]; |
15e47304 | 1099 | u32 portid = skb ? NETLINK_CB(skb).portid : 0; |
1da177e4 LT |
1100 | int ret = 0, ovr = 0; |
1101 | ||
0b0f43fe JHS |
1102 | if ((n->nlmsg_type != RTM_GETACTION) && |
1103 | !netlink_capable(skb, CAP_NET_ADMIN)) | |
dfc47ef8 EB |
1104 | return -EPERM; |
1105 | ||
90825b23 | 1106 | ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ROOT_MAX, NULL, |
c21ef3e3 | 1107 | extack); |
7ba699c6 PM |
1108 | if (ret < 0) |
1109 | return ret; | |
1110 | ||
1111 | if (tca[TCA_ACT_TAB] == NULL) { | |
6ff9c364 | 1112 | pr_notice("tc_ctl_action: received NO action attribs\n"); |
1da177e4 LT |
1113 | return -EINVAL; |
1114 | } | |
1115 | ||
cc7ec456 | 1116 | /* n->nlmsg_flags & NLM_F_CREATE */ |
1da177e4 LT |
1117 | switch (n->nlmsg_type) { |
1118 | case RTM_NEWACTION: | |
1119 | /* we are going to assume all other flags | |
25985edc | 1120 | * imply create only if it doesn't exist |
1da177e4 LT |
1121 | * Note that CREATE | EXCL implies that |
1122 | * but since we want avoid ambiguity (eg when flags | |
1123 | * is zero) then just set this | |
1124 | */ | |
cc7ec456 | 1125 | if (n->nlmsg_flags & NLM_F_REPLACE) |
1da177e4 LT |
1126 | ovr = 1; |
1127 | replay: | |
15e47304 | 1128 | ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr); |
1da177e4 LT |
1129 | if (ret == -EAGAIN) |
1130 | goto replay; | |
1131 | break; | |
1132 | case RTM_DELACTION: | |
7316ae88 | 1133 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
15e47304 | 1134 | portid, RTM_DELACTION); |
1da177e4 LT |
1135 | break; |
1136 | case RTM_GETACTION: | |
7316ae88 | 1137 | ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, |
15e47304 | 1138 | portid, RTM_GETACTION); |
1da177e4 LT |
1139 | break; |
1140 | default: | |
1141 | BUG(); | |
1142 | } | |
1143 | ||
1144 | return ret; | |
1145 | } | |
1146 | ||
90825b23 | 1147 | static struct nlattr *find_dump_kind(struct nlattr **nla) |
1da177e4 | 1148 | { |
cc7ec456 | 1149 | struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1]; |
7ba699c6 | 1150 | struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; |
7ba699c6 | 1151 | struct nlattr *kind; |
1da177e4 | 1152 | |
7ba699c6 | 1153 | tb1 = nla[TCA_ACT_TAB]; |
1da177e4 LT |
1154 | if (tb1 == NULL) |
1155 | return NULL; | |
1156 | ||
7ba699c6 | 1157 | if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), |
fceb6435 | 1158 | NLMSG_ALIGN(nla_len(tb1)), NULL, NULL) < 0) |
1da177e4 | 1159 | return NULL; |
1da177e4 | 1160 | |
6d834e04 PM |
1161 | if (tb[1] == NULL) |
1162 | return NULL; | |
fceb6435 | 1163 | if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL, NULL) < 0) |
1da177e4 | 1164 | return NULL; |
7ba699c6 | 1165 | kind = tb2[TCA_ACT_KIND]; |
1da177e4 | 1166 | |
26dab893 | 1167 | return kind; |
1da177e4 LT |
1168 | } |
1169 | ||
5a7a5555 | 1170 | static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 1171 | { |
ddf97ccd | 1172 | struct net *net = sock_net(skb->sk); |
1da177e4 | 1173 | struct nlmsghdr *nlh; |
27a884dc | 1174 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 1175 | struct nlattr *nest; |
1da177e4 | 1176 | struct tc_action_ops *a_o; |
1da177e4 | 1177 | int ret = 0; |
8b00a53c | 1178 | struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh); |
90825b23 JHS |
1179 | struct nlattr *tb[TCA_ROOT_MAX + 1]; |
1180 | struct nlattr *count_attr = NULL; | |
e62e484d | 1181 | unsigned long jiffy_since = 0; |
90825b23 JHS |
1182 | struct nlattr *kind = NULL; |
1183 | struct nla_bitfield32 bf; | |
e62e484d | 1184 | u32 msecs_since = 0; |
90825b23 JHS |
1185 | u32 act_count = 0; |
1186 | ||
1187 | ret = nlmsg_parse(cb->nlh, sizeof(struct tcamsg), tb, TCA_ROOT_MAX, | |
1188 | tcaa_policy, NULL); | |
1189 | if (ret < 0) | |
1190 | return ret; | |
1da177e4 | 1191 | |
90825b23 | 1192 | kind = find_dump_kind(tb); |
1da177e4 | 1193 | if (kind == NULL) { |
6ff9c364 | 1194 | pr_info("tc_dump_action: action bad kind\n"); |
1da177e4 LT |
1195 | return 0; |
1196 | } | |
1197 | ||
26dab893 | 1198 | a_o = tc_lookup_action(kind); |
cc7ec456 | 1199 | if (a_o == NULL) |
1da177e4 | 1200 | return 0; |
1da177e4 | 1201 | |
90825b23 JHS |
1202 | cb->args[2] = 0; |
1203 | if (tb[TCA_ROOT_FLAGS]) { | |
1204 | bf = nla_get_bitfield32(tb[TCA_ROOT_FLAGS]); | |
1205 | cb->args[2] = bf.value; | |
1206 | } | |
1207 | ||
e62e484d JHS |
1208 | if (tb[TCA_ROOT_TIME_DELTA]) { |
1209 | msecs_since = nla_get_u32(tb[TCA_ROOT_TIME_DELTA]); | |
1210 | } | |
1211 | ||
15e47304 | 1212 | nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
8b00a53c DM |
1213 | cb->nlh->nlmsg_type, sizeof(*t), 0); |
1214 | if (!nlh) | |
1215 | goto out_module_put; | |
90825b23 | 1216 | |
e62e484d JHS |
1217 | if (msecs_since) |
1218 | jiffy_since = jiffies - msecs_to_jiffies(msecs_since); | |
1219 | ||
8b00a53c | 1220 | t = nlmsg_data(nlh); |
1da177e4 | 1221 | t->tca_family = AF_UNSPEC; |
9ef1d4c7 PM |
1222 | t->tca__pad1 = 0; |
1223 | t->tca__pad2 = 0; | |
e62e484d | 1224 | cb->args[3] = jiffy_since; |
90825b23 JHS |
1225 | count_attr = nla_reserve(skb, TCA_ROOT_COUNT, sizeof(u32)); |
1226 | if (!count_attr) | |
1227 | goto out_module_put; | |
1da177e4 | 1228 | |
4b3550ef PM |
1229 | nest = nla_nest_start(skb, TCA_ACT_TAB); |
1230 | if (nest == NULL) | |
8b00a53c | 1231 | goto out_module_put; |
1da177e4 | 1232 | |
a85a970a | 1233 | ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o); |
1da177e4 | 1234 | if (ret < 0) |
8b00a53c | 1235 | goto out_module_put; |
1da177e4 LT |
1236 | |
1237 | if (ret > 0) { | |
4b3550ef | 1238 | nla_nest_end(skb, nest); |
1da177e4 | 1239 | ret = skb->len; |
90825b23 JHS |
1240 | act_count = cb->args[1]; |
1241 | memcpy(nla_data(count_attr), &act_count, sizeof(u32)); | |
1242 | cb->args[1] = 0; | |
1da177e4 | 1243 | } else |
ebecaa66 | 1244 | nlmsg_trim(skb, b); |
1da177e4 | 1245 | |
27a884dc | 1246 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
15e47304 | 1247 | if (NETLINK_CB(cb->skb).portid && ret) |
1da177e4 LT |
1248 | nlh->nlmsg_flags |= NLM_F_MULTI; |
1249 | module_put(a_o->owner); | |
1250 | return skb->len; | |
1251 | ||
8b00a53c | 1252 | out_module_put: |
1da177e4 | 1253 | module_put(a_o->owner); |
dc5fc579 | 1254 | nlmsg_trim(skb, b); |
1da177e4 LT |
1255 | return skb->len; |
1256 | } | |
1257 | ||
b3f55bdd JP |
1258 | struct tcf_action_net { |
1259 | struct rhashtable egdev_ht; | |
1260 | }; | |
1261 | ||
1262 | static unsigned int tcf_action_net_id; | |
1263 | ||
1264 | struct tcf_action_egdev_cb { | |
1265 | struct list_head list; | |
1266 | tc_setup_cb_t *cb; | |
1267 | void *cb_priv; | |
1268 | }; | |
1269 | ||
1270 | struct tcf_action_egdev { | |
1271 | struct rhash_head ht_node; | |
1272 | const struct net_device *dev; | |
1273 | unsigned int refcnt; | |
1274 | struct list_head cb_list; | |
1275 | }; | |
1276 | ||
1277 | static const struct rhashtable_params tcf_action_egdev_ht_params = { | |
1278 | .key_offset = offsetof(struct tcf_action_egdev, dev), | |
1279 | .head_offset = offsetof(struct tcf_action_egdev, ht_node), | |
1280 | .key_len = sizeof(const struct net_device *), | |
1281 | }; | |
1282 | ||
1283 | static struct tcf_action_egdev * | |
1284 | tcf_action_egdev_lookup(const struct net_device *dev) | |
1285 | { | |
1286 | struct net *net = dev_net(dev); | |
1287 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1288 | ||
1289 | return rhashtable_lookup_fast(&tan->egdev_ht, &dev, | |
1290 | tcf_action_egdev_ht_params); | |
1291 | } | |
1292 | ||
1293 | static struct tcf_action_egdev * | |
1294 | tcf_action_egdev_get(const struct net_device *dev) | |
1295 | { | |
1296 | struct tcf_action_egdev *egdev; | |
1297 | struct tcf_action_net *tan; | |
1298 | ||
1299 | egdev = tcf_action_egdev_lookup(dev); | |
1300 | if (egdev) | |
1301 | goto inc_ref; | |
1302 | ||
1303 | egdev = kzalloc(sizeof(*egdev), GFP_KERNEL); | |
1304 | if (!egdev) | |
1305 | return NULL; | |
1306 | INIT_LIST_HEAD(&egdev->cb_list); | |
0843c092 | 1307 | egdev->dev = dev; |
b3f55bdd JP |
1308 | tan = net_generic(dev_net(dev), tcf_action_net_id); |
1309 | rhashtable_insert_fast(&tan->egdev_ht, &egdev->ht_node, | |
1310 | tcf_action_egdev_ht_params); | |
1311 | ||
1312 | inc_ref: | |
1313 | egdev->refcnt++; | |
1314 | return egdev; | |
1315 | } | |
1316 | ||
1317 | static void tcf_action_egdev_put(struct tcf_action_egdev *egdev) | |
1318 | { | |
1319 | struct tcf_action_net *tan; | |
1320 | ||
1321 | if (--egdev->refcnt) | |
1322 | return; | |
1323 | tan = net_generic(dev_net(egdev->dev), tcf_action_net_id); | |
1324 | rhashtable_remove_fast(&tan->egdev_ht, &egdev->ht_node, | |
1325 | tcf_action_egdev_ht_params); | |
1326 | kfree(egdev); | |
1327 | } | |
1328 | ||
1329 | static struct tcf_action_egdev_cb * | |
1330 | tcf_action_egdev_cb_lookup(struct tcf_action_egdev *egdev, | |
1331 | tc_setup_cb_t *cb, void *cb_priv) | |
1332 | { | |
1333 | struct tcf_action_egdev_cb *egdev_cb; | |
1334 | ||
1335 | list_for_each_entry(egdev_cb, &egdev->cb_list, list) | |
1336 | if (egdev_cb->cb == cb && egdev_cb->cb_priv == cb_priv) | |
1337 | return egdev_cb; | |
1338 | return NULL; | |
1339 | } | |
1340 | ||
1341 | static int tcf_action_egdev_cb_call(struct tcf_action_egdev *egdev, | |
1342 | enum tc_setup_type type, | |
1343 | void *type_data, bool err_stop) | |
1344 | { | |
1345 | struct tcf_action_egdev_cb *egdev_cb; | |
1346 | int ok_count = 0; | |
1347 | int err; | |
1348 | ||
1349 | list_for_each_entry(egdev_cb, &egdev->cb_list, list) { | |
1350 | err = egdev_cb->cb(type, type_data, egdev_cb->cb_priv); | |
1351 | if (err) { | |
1352 | if (err_stop) | |
1353 | return err; | |
1354 | } else { | |
1355 | ok_count++; | |
1356 | } | |
1357 | } | |
1358 | return ok_count; | |
1359 | } | |
1360 | ||
1361 | static int tcf_action_egdev_cb_add(struct tcf_action_egdev *egdev, | |
1362 | tc_setup_cb_t *cb, void *cb_priv) | |
1363 | { | |
1364 | struct tcf_action_egdev_cb *egdev_cb; | |
1365 | ||
1366 | egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv); | |
1367 | if (WARN_ON(egdev_cb)) | |
1368 | return -EEXIST; | |
1369 | egdev_cb = kzalloc(sizeof(*egdev_cb), GFP_KERNEL); | |
1370 | if (!egdev_cb) | |
1371 | return -ENOMEM; | |
1372 | egdev_cb->cb = cb; | |
1373 | egdev_cb->cb_priv = cb_priv; | |
1374 | list_add(&egdev_cb->list, &egdev->cb_list); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static void tcf_action_egdev_cb_del(struct tcf_action_egdev *egdev, | |
1379 | tc_setup_cb_t *cb, void *cb_priv) | |
1380 | { | |
1381 | struct tcf_action_egdev_cb *egdev_cb; | |
1382 | ||
1383 | egdev_cb = tcf_action_egdev_cb_lookup(egdev, cb, cb_priv); | |
1384 | if (WARN_ON(!egdev_cb)) | |
1385 | return; | |
1386 | list_del(&egdev_cb->list); | |
1387 | kfree(egdev_cb); | |
1388 | } | |
1389 | ||
1390 | static int __tc_setup_cb_egdev_register(const struct net_device *dev, | |
1391 | tc_setup_cb_t *cb, void *cb_priv) | |
1392 | { | |
1393 | struct tcf_action_egdev *egdev = tcf_action_egdev_get(dev); | |
1394 | int err; | |
1395 | ||
1396 | if (!egdev) | |
1397 | return -ENOMEM; | |
1398 | err = tcf_action_egdev_cb_add(egdev, cb, cb_priv); | |
1399 | if (err) | |
1400 | goto err_cb_add; | |
1401 | return 0; | |
1402 | ||
1403 | err_cb_add: | |
1404 | tcf_action_egdev_put(egdev); | |
1405 | return err; | |
1406 | } | |
1407 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
1408 | tc_setup_cb_t *cb, void *cb_priv) | |
1409 | { | |
1410 | int err; | |
1411 | ||
1412 | rtnl_lock(); | |
1413 | err = __tc_setup_cb_egdev_register(dev, cb, cb_priv); | |
1414 | rtnl_unlock(); | |
1415 | return err; | |
1416 | } | |
1417 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_register); | |
1418 | ||
1419 | static void __tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
1420 | tc_setup_cb_t *cb, void *cb_priv) | |
1421 | { | |
1422 | struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev); | |
1423 | ||
1424 | if (WARN_ON(!egdev)) | |
1425 | return; | |
1426 | tcf_action_egdev_cb_del(egdev, cb, cb_priv); | |
1427 | tcf_action_egdev_put(egdev); | |
1428 | } | |
1429 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
1430 | tc_setup_cb_t *cb, void *cb_priv) | |
1431 | { | |
1432 | rtnl_lock(); | |
1433 | __tc_setup_cb_egdev_unregister(dev, cb, cb_priv); | |
1434 | rtnl_unlock(); | |
1435 | } | |
1436 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_unregister); | |
1437 | ||
1438 | int tc_setup_cb_egdev_call(const struct net_device *dev, | |
1439 | enum tc_setup_type type, void *type_data, | |
1440 | bool err_stop) | |
1441 | { | |
1442 | struct tcf_action_egdev *egdev = tcf_action_egdev_lookup(dev); | |
1443 | ||
1444 | if (!egdev) | |
1445 | return 0; | |
1446 | return tcf_action_egdev_cb_call(egdev, type, type_data, err_stop); | |
1447 | } | |
1448 | EXPORT_SYMBOL_GPL(tc_setup_cb_egdev_call); | |
1449 | ||
1450 | static __net_init int tcf_action_net_init(struct net *net) | |
1451 | { | |
1452 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1453 | ||
1454 | return rhashtable_init(&tan->egdev_ht, &tcf_action_egdev_ht_params); | |
1455 | } | |
1456 | ||
1457 | static void __net_exit tcf_action_net_exit(struct net *net) | |
1458 | { | |
1459 | struct tcf_action_net *tan = net_generic(net, tcf_action_net_id); | |
1460 | ||
1461 | rhashtable_destroy(&tan->egdev_ht); | |
1462 | } | |
1463 | ||
1464 | static struct pernet_operations tcf_action_net_ops = { | |
1465 | .init = tcf_action_net_init, | |
1466 | .exit = tcf_action_net_exit, | |
1467 | .id = &tcf_action_net_id, | |
1468 | .size = sizeof(struct tcf_action_net), | |
1469 | }; | |
1470 | ||
1da177e4 LT |
1471 | static int __init tc_action_init(void) |
1472 | { | |
b3f55bdd JP |
1473 | int err; |
1474 | ||
1475 | err = register_pernet_subsys(&tcf_action_net_ops); | |
1476 | if (err) | |
1477 | return err; | |
1478 | ||
b97bac64 FW |
1479 | rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, 0); |
1480 | rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, 0); | |
c7ac8679 | 1481 | rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action, |
b97bac64 | 1482 | 0); |
1da177e4 | 1483 | |
1da177e4 LT |
1484 | return 0; |
1485 | } | |
1486 | ||
1487 | subsys_initcall(tc_action_init); |