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net: sched: gred: pass the right attribute to gred_change_table_def()
[mirror_ubuntu-bionic-kernel.git] / net / sched / act_api.c
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
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/init.h>
21 #include <linux/kmod.h>
22 #include <linux/err.h>
23 #include <linux/module.h>
24 #include <linux/rhashtable.h>
25 #include <linux/list.h>
26 #include <net/net_namespace.h>
27 #include <net/sock.h>
28 #include <net/sch_generic.h>
29 #include <net/pkt_cls.h>
30 #include <net/act_api.h>
31 #include <net/netlink.h>
32
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;
39 a->goto_chain = tcf_chain_get(tp->chain->block, chain_index, true);
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
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)
64 {
65 free_percpu(p->cpu_bstats);
66 free_percpu(p->cpu_qstats);
67
68 if (p->act_cookie) {
69 kfree(p->act_cookie->data);
70 kfree(p->act_cookie);
71 }
72 if (p->goto_chain)
73 tcf_action_goto_chain_fini(p);
74
75 kfree(p);
76 }
77
78 static void tcf_idr_remove(struct tcf_idrinfo *idrinfo, struct tc_action *p)
79 {
80 spin_lock_bh(&idrinfo->lock);
81 idr_remove_ext(&idrinfo->action_idr, p->tcfa_index);
82 spin_unlock_bh(&idrinfo->lock);
83 gen_kill_estimator(&p->tcfa_rate_est);
84 free_tcf(p);
85 }
86
87 int __tcf_idr_release(struct tc_action *p, bool bind, bool strict)
88 {
89 int ret = 0;
90
91 ASSERT_RTNL();
92
93 if (p) {
94 if (bind)
95 p->tcfa_bindcnt--;
96 else if (strict && p->tcfa_bindcnt > 0)
97 return -EPERM;
98
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);
103 tcf_idr_remove(p->idrinfo, p);
104 ret = ACT_P_DELETED;
105 }
106 }
107
108 return ret;
109 }
110 EXPORT_SYMBOL(__tcf_idr_release);
111
112 static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
113 struct netlink_callback *cb)
114 {
115 int err = 0, index = -1, s_i = 0, n_i = 0;
116 u32 act_flags = cb->args[2];
117 unsigned long jiffy_since = cb->args[3];
118 struct nlattr *nest;
119 struct idr *idr = &idrinfo->action_idr;
120 struct tc_action *p;
121 unsigned long id = 1;
122
123 spin_lock_bh(&idrinfo->lock);
124
125 s_i = cb->args[0];
126
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);
138 if (!nest) {
139 index--;
140 goto nla_put_failure;
141 }
142 err = tcf_action_dump_1(skb, p, 0, 0);
143 if (err < 0) {
144 index--;
145 nlmsg_trim(skb, nest);
146 goto done;
147 }
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;
153 }
154 done:
155 if (index >= 0)
156 cb->args[0] = index + 1;
157
158 spin_unlock_bh(&idrinfo->lock);
159 if (n_i) {
160 if (act_flags & TCA_FLAG_LARGE_DUMP_ON)
161 cb->args[1] = n_i;
162 }
163 return n_i;
164
165 nla_put_failure:
166 nla_nest_cancel(skb, nest);
167 goto done;
168 }
169
170 static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
171 const struct tc_action_ops *ops)
172 {
173 struct nlattr *nest;
174 int n_i = 0;
175 int ret = -EINVAL;
176 struct idr *idr = &idrinfo->action_idr;
177 struct tc_action *p;
178 unsigned long id = 1;
179
180 nest = nla_nest_start(skb, 0);
181 if (nest == NULL)
182 goto nla_put_failure;
183 if (nla_put_string(skb, TCA_KIND, ops->kind))
184 goto nla_put_failure;
185
186 idr_for_each_entry_ext(idr, p, id) {
187 ret = __tcf_idr_release(p, false, true);
188 if (ret == ACT_P_DELETED) {
189 module_put(ops->owner);
190 n_i++;
191 } else if (ret < 0) {
192 goto nla_put_failure;
193 }
194 }
195 if (nla_put_u32(skb, TCA_FCNT, n_i))
196 goto nla_put_failure;
197 nla_nest_end(skb, nest);
198
199 return n_i;
200 nla_put_failure:
201 nla_nest_cancel(skb, nest);
202 return ret;
203 }
204
205 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
206 struct netlink_callback *cb, int type,
207 const struct tc_action_ops *ops)
208 {
209 struct tcf_idrinfo *idrinfo = tn->idrinfo;
210
211 if (type == RTM_DELACTION) {
212 return tcf_del_walker(idrinfo, skb, ops);
213 } else if (type == RTM_GETACTION) {
214 return tcf_dump_walker(idrinfo, skb, cb);
215 } else {
216 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
217 return -EINVAL;
218 }
219 }
220 EXPORT_SYMBOL(tcf_generic_walker);
221
222 static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo)
223 {
224 struct tc_action *p = NULL;
225
226 spin_lock_bh(&idrinfo->lock);
227 p = idr_find_ext(&idrinfo->action_idr, index);
228 spin_unlock_bh(&idrinfo->lock);
229
230 return p;
231 }
232
233 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
234 {
235 struct tcf_idrinfo *idrinfo = tn->idrinfo;
236 struct tc_action *p = tcf_idr_lookup(index, idrinfo);
237
238 if (p) {
239 *a = p;
240 return 1;
241 }
242 return 0;
243 }
244 EXPORT_SYMBOL(tcf_idr_search);
245
246 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
247 int bind)
248 {
249 struct tcf_idrinfo *idrinfo = tn->idrinfo;
250 struct tc_action *p = tcf_idr_lookup(index, idrinfo);
251
252 if (index && p) {
253 if (bind)
254 p->tcfa_bindcnt++;
255 p->tcfa_refcnt++;
256 *a = p;
257 return true;
258 }
259 return false;
260 }
261 EXPORT_SYMBOL(tcf_idr_check);
262
263 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est)
264 {
265 if (est)
266 gen_kill_estimator(&a->tcfa_rate_est);
267 free_tcf(a);
268 }
269 EXPORT_SYMBOL(tcf_idr_cleanup);
270
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)
274 {
275 struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
276 struct tcf_idrinfo *idrinfo = tn->idrinfo;
277 struct idr *idr = &idrinfo->action_idr;
278 int err = -ENOMEM;
279 unsigned long idr_index;
280
281 if (unlikely(!p))
282 return -ENOMEM;
283 p->tcfa_refcnt = 1;
284 if (bind)
285 p->tcfa_bindcnt = 1;
286
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 }
301 spin_lock_init(&p->tcfa_lock);
302 /* user doesn't specify an index */
303 if (!index) {
304 idr_preload(GFP_KERNEL);
305 spin_lock_bh(&idrinfo->lock);
306 err = idr_alloc_ext(idr, NULL, &idr_index, 1, 0,
307 GFP_ATOMIC);
308 spin_unlock_bh(&idrinfo->lock);
309 idr_preload_end();
310 if (err) {
311 err3:
312 free_percpu(p->cpu_qstats);
313 goto err2;
314 }
315 p->tcfa_index = idr_index;
316 } else {
317 idr_preload(GFP_KERNEL);
318 spin_lock_bh(&idrinfo->lock);
319 err = idr_alloc_ext(idr, NULL, NULL, index, index + 1,
320 GFP_ATOMIC);
321 spin_unlock_bh(&idrinfo->lock);
322 idr_preload_end();
323 if (err)
324 goto err3;
325 p->tcfa_index = index;
326 }
327
328 p->tcfa_tm.install = jiffies;
329 p->tcfa_tm.lastuse = jiffies;
330 p->tcfa_tm.firstuse = 0;
331 if (est) {
332 err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
333 &p->tcfa_rate_est,
334 &p->tcfa_lock, NULL, est);
335 if (err) {
336 goto err3;
337 }
338 }
339
340 p->idrinfo = idrinfo;
341 p->ops = ops;
342 INIT_LIST_HEAD(&p->list);
343 *a = p;
344 return 0;
345 }
346 EXPORT_SYMBOL(tcf_idr_create);
347
348 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a)
349 {
350 struct tcf_idrinfo *idrinfo = tn->idrinfo;
351
352 spin_lock_bh(&idrinfo->lock);
353 idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index);
354 spin_unlock_bh(&idrinfo->lock);
355 }
356 EXPORT_SYMBOL(tcf_idr_insert);
357
358 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
359 struct tcf_idrinfo *idrinfo)
360 {
361 struct idr *idr = &idrinfo->action_idr;
362 struct tc_action *p;
363 int ret;
364 unsigned long id = 1;
365
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;
372 }
373 idr_destroy(&idrinfo->action_idr);
374 }
375 EXPORT_SYMBOL(tcf_idrinfo_destroy);
376
377 static LIST_HEAD(act_base);
378 static DEFINE_RWLOCK(act_mod_lock);
379
380 int tcf_register_action(struct tc_action_ops *act,
381 struct pernet_operations *ops)
382 {
383 struct tc_action_ops *a;
384 int ret;
385
386 if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
387 return -EINVAL;
388
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
397 write_lock(&act_mod_lock);
398 list_for_each_entry(a, &act_base, head) {
399 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
400 write_unlock(&act_mod_lock);
401 unregister_pernet_subsys(ops);
402 return -EEXIST;
403 }
404 }
405 list_add_tail(&act->head, &act_base);
406 write_unlock(&act_mod_lock);
407
408 return 0;
409 }
410 EXPORT_SYMBOL(tcf_register_action);
411
412 int tcf_unregister_action(struct tc_action_ops *act,
413 struct pernet_operations *ops)
414 {
415 struct tc_action_ops *a;
416 int err = -ENOENT;
417
418 write_lock(&act_mod_lock);
419 list_for_each_entry(a, &act_base, head) {
420 if (a == act) {
421 list_del(&act->head);
422 err = 0;
423 break;
424 }
425 }
426 write_unlock(&act_mod_lock);
427 if (!err)
428 unregister_pernet_subsys(ops);
429 return err;
430 }
431 EXPORT_SYMBOL(tcf_unregister_action);
432
433 /* lookup by name */
434 static struct tc_action_ops *tc_lookup_action_n(char *kind)
435 {
436 struct tc_action_ops *a, *res = NULL;
437
438 if (kind) {
439 read_lock(&act_mod_lock);
440 list_for_each_entry(a, &act_base, head) {
441 if (strcmp(kind, a->kind) == 0) {
442 if (try_module_get(a->owner))
443 res = a;
444 break;
445 }
446 }
447 read_unlock(&act_mod_lock);
448 }
449 return res;
450 }
451
452 /* lookup by nlattr */
453 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
454 {
455 struct tc_action_ops *a, *res = NULL;
456
457 if (kind) {
458 read_lock(&act_mod_lock);
459 list_for_each_entry(a, &act_base, head) {
460 if (nla_strcmp(kind, a->kind) == 0) {
461 if (try_module_get(a->owner))
462 res = a;
463 break;
464 }
465 }
466 read_unlock(&act_mod_lock);
467 }
468 return res;
469 }
470
471 /*TCA_ACT_MAX_PRIO is 32, there count upto 32 */
472 #define TCA_ACT_MAX_PRIO_MASK 0x1FF
473 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
474 int nr_actions, struct tcf_result *res)
475 {
476 u32 jmp_prgcnt = 0;
477 u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */
478 int i;
479 int ret = TC_ACT_OK;
480
481 if (skb_skip_tc_classify(skb))
482 return TC_ACT_OK;
483
484 restart_act_graph:
485 for (i = 0; i < nr_actions; i++) {
486 const struct tc_action *a = actions[i];
487
488 if (jmp_prgcnt > 0) {
489 jmp_prgcnt -= 1;
490 continue;
491 }
492 repeat:
493 ret = a->ops->act(skb, a, res);
494 if (ret == TC_ACT_REPEAT)
495 goto repeat; /* we need a ttl - JHS */
496
497 if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) {
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 }
509 } else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) {
510 tcf_action_goto_chain_exec(a, res);
511 }
512
513 if (ret != TC_ACT_PIPE)
514 break;
515 }
516
517 return ret;
518 }
519 EXPORT_SYMBOL(tcf_action_exec);
520
521 int tcf_action_destroy(struct list_head *actions, int bind)
522 {
523 const struct tc_action_ops *ops;
524 struct tc_action *a, *tmp;
525 int ret = 0;
526
527 list_for_each_entry_safe(a, tmp, actions, list) {
528 ops = a->ops;
529 ret = __tcf_idr_release(a, bind, true);
530 if (ret == ACT_P_DELETED)
531 module_put(ops->owner);
532 else if (ret < 0)
533 return ret;
534 }
535 return ret;
536 }
537
538 int
539 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
540 {
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;
548 unsigned char *b = skb_tail_pointer(skb);
549 struct nlattr *nest;
550
551 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
552 goto nla_put_failure;
553 if (tcf_action_copy_stats(skb, a, 0))
554 goto nla_put_failure;
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
561 nest = nla_nest_start(skb, TCA_OPTIONS);
562 if (nest == NULL)
563 goto nla_put_failure;
564 err = tcf_action_dump_old(skb, a, bind, ref);
565 if (err > 0) {
566 nla_nest_end(skb, nest);
567 return err;
568 }
569
570 nla_put_failure:
571 nlmsg_trim(skb, b);
572 return -1;
573 }
574 EXPORT_SYMBOL(tcf_action_dump_1);
575
576 int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
577 int bind, int ref)
578 {
579 struct tc_action *a;
580 int err = -EINVAL;
581 struct nlattr *nest;
582
583 list_for_each_entry(a, actions, list) {
584 nest = nla_nest_start(skb, a->order);
585 if (nest == NULL)
586 goto nla_put_failure;
587 err = tcf_action_dump_1(skb, a, bind, ref);
588 if (err < 0)
589 goto errout;
590 nla_nest_end(skb, nest);
591 }
592
593 return 0;
594
595 nla_put_failure:
596 err = -EINVAL;
597 errout:
598 nla_nest_cancel(skb, nest);
599 return err;
600 }
601
602 static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb)
603 {
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;
612 }
613 c->len = nla_len(tb[TCA_ACT_COOKIE]);
614
615 return c;
616 }
617
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)
621 {
622 struct tc_action *a;
623 struct tc_action_ops *a_o;
624 struct tc_cookie *cookie = NULL;
625 char act_name[IFNAMSIZ];
626 struct nlattr *tb[TCA_ACT_MAX + 1];
627 struct nlattr *kind;
628 int err;
629
630 if (name == NULL) {
631 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
632 if (err < 0)
633 goto err_out;
634 err = -EINVAL;
635 kind = tb[TCA_ACT_KIND];
636 if (kind == NULL)
637 goto err_out;
638 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
639 goto err_out;
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 }
652 } else {
653 err = -EINVAL;
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) {
660 #ifdef CONFIG_MODULES
661 rtnl_unlock();
662 request_module("act_%s", act_name);
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) {
674 err = -EAGAIN;
675 goto err_mod;
676 }
677 #endif
678 err = -ENOENT;
679 goto err_out;
680 }
681
682 /* backward compatibility for policer */
683 if (name == NULL)
684 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
685 else
686 err = a_o->init(net, nla, est, &a, ovr, bind);
687 if (err < 0)
688 goto err_mod;
689
690 if (name == NULL && tb[TCA_ACT_COOKIE]) {
691 if (a->act_cookie) {
692 kfree(a->act_cookie->data);
693 kfree(a->act_cookie);
694 }
695 a->act_cookie = cookie;
696 }
697
698 /* module count goes up only when brand new policy is created
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 */
702 if (err != ACT_P_CREATED)
703 module_put(a_o->owner);
704
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
716 return a;
717
718 err_mod:
719 module_put(a_o->owner);
720 err_out:
721 if (cookie) {
722 kfree(cookie->data);
723 kfree(cookie);
724 }
725 return ERR_PTR(err);
726 }
727
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
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)
742 {
743 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
744 struct tc_action *act;
745 int err;
746 int i;
747
748 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL);
749 if (err < 0)
750 return err;
751
752 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
753 act = tcf_action_init_1(net, tp, tb[i], est, name, ovr, bind);
754 if (IS_ERR(act)) {
755 err = PTR_ERR(act);
756 goto err;
757 }
758 act->order = i;
759 if (ovr)
760 act->tcfa_refcnt++;
761 list_add_tail(&act->list, actions);
762 }
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);
768 return 0;
769
770 err:
771 tcf_action_destroy(actions, bind);
772 return err;
773 }
774
775 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
776 int compat_mode)
777 {
778 int err = 0;
779 struct gnet_dump d;
780
781 if (p == NULL)
782 goto errout;
783
784 /* compat_mode being true specifies a call that is supposed
785 * to add additional backward compatibility statistic TLVs.
786 */
787 if (compat_mode) {
788 if (p->type == TCA_OLD_COMPAT)
789 err = gnet_stats_start_copy_compat(skb, 0,
790 TCA_STATS,
791 TCA_XSTATS,
792 &p->tcfa_lock, &d,
793 TCA_PAD);
794 else
795 return 0;
796 } else
797 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
798 &p->tcfa_lock, &d, TCA_ACT_PAD);
799
800 if (err < 0)
801 goto errout;
802
803 if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
804 gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 ||
805 gnet_stats_copy_queue(&d, p->cpu_qstats,
806 &p->tcfa_qstats,
807 p->tcfa_qstats.qlen) < 0)
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
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)
822 {
823 struct tcamsg *t;
824 struct nlmsghdr *nlh;
825 unsigned char *b = skb_tail_pointer(skb);
826 struct nlattr *nest;
827
828 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
829 if (!nlh)
830 goto out_nlmsg_trim;
831 t = nlmsg_data(nlh);
832 t->tca_family = AF_UNSPEC;
833 t->tca__pad1 = 0;
834 t->tca__pad2 = 0;
835
836 nest = nla_nest_start(skb, TCA_ACT_TAB);
837 if (nest == NULL)
838 goto out_nlmsg_trim;
839
840 if (tcf_action_dump(skb, actions, bind, ref) < 0)
841 goto out_nlmsg_trim;
842
843 nla_nest_end(skb, nest);
844
845 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
846 return skb->len;
847
848 out_nlmsg_trim:
849 nlmsg_trim(skb, b);
850 return -1;
851 }
852
853 static int
854 tcf_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
855 struct list_head *actions, int event)
856 {
857 struct sk_buff *skb;
858
859 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
860 if (!skb)
861 return -ENOBUFS;
862 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
863 0, 0) <= 0) {
864 kfree_skb(skb);
865 return -EINVAL;
866 }
867
868 return rtnl_unicast(skb, net, portid);
869 }
870
871 static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
872 struct nlmsghdr *n, u32 portid)
873 {
874 struct nlattr *tb[TCA_ACT_MAX + 1];
875 const struct tc_action_ops *ops;
876 struct tc_action *a;
877 int index;
878 int err;
879
880 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
881 if (err < 0)
882 goto err_out;
883
884 err = -EINVAL;
885 if (tb[TCA_ACT_INDEX] == NULL ||
886 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
887 goto err_out;
888 index = nla_get_u32(tb[TCA_ACT_INDEX]);
889
890 err = -EINVAL;
891 ops = tc_lookup_action(tb[TCA_ACT_KIND]);
892 if (!ops) /* could happen in batch of actions */
893 goto err_out;
894 err = -ENOENT;
895 if (ops->lookup(net, &a, index) == 0)
896 goto err_mod;
897
898 module_put(ops->owner);
899 return a;
900
901 err_mod:
902 module_put(ops->owner);
903 err_out:
904 return ERR_PTR(err);
905 }
906
907 static int tca_action_flush(struct net *net, struct nlattr *nla,
908 struct nlmsghdr *n, u32 portid)
909 {
910 struct sk_buff *skb;
911 unsigned char *b;
912 struct nlmsghdr *nlh;
913 struct tcamsg *t;
914 struct netlink_callback dcb;
915 struct nlattr *nest;
916 struct nlattr *tb[TCA_ACT_MAX + 1];
917 const struct tc_action_ops *ops;
918 struct nlattr *kind;
919 int err = -ENOMEM;
920
921 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
922 if (!skb) {
923 pr_debug("tca_action_flush: failed skb alloc\n");
924 return err;
925 }
926
927 b = skb_tail_pointer(skb);
928
929 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL, NULL);
930 if (err < 0)
931 goto err_out;
932
933 err = -EINVAL;
934 kind = tb[TCA_ACT_KIND];
935 ops = tc_lookup_action(kind);
936 if (!ops) /*some idjot trying to flush unknown action */
937 goto err_out;
938
939 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
940 sizeof(*t), 0);
941 if (!nlh)
942 goto out_module_put;
943 t = nlmsg_data(nlh);
944 t->tca_family = AF_UNSPEC;
945 t->tca__pad1 = 0;
946 t->tca__pad2 = 0;
947
948 nest = nla_nest_start(skb, TCA_ACT_TAB);
949 if (nest == NULL)
950 goto out_module_put;
951
952 err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops);
953 if (err <= 0)
954 goto out_module_put;
955
956 nla_nest_end(skb, nest);
957
958 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
959 nlh->nlmsg_flags |= NLM_F_ROOT;
960 module_put(ops->owner);
961 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
962 n->nlmsg_flags & NLM_F_ECHO);
963 if (err > 0)
964 return 0;
965
966 return err;
967
968 out_module_put:
969 module_put(ops->owner);
970 err_out:
971 kfree_skb(skb);
972 return err;
973 }
974
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 */
993 ret = tcf_action_destroy(actions, 0);
994 if (ret < 0) {
995 kfree_skb(skb);
996 return ret;
997 }
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
1006 static int
1007 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
1008 u32 portid, int event)
1009 {
1010 int i, ret;
1011 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1012 struct tc_action *act;
1013 LIST_HEAD(actions);
1014
1015 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL, NULL);
1016 if (ret < 0)
1017 return ret;
1018
1019 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
1020 if (tb[1] != NULL)
1021 return tca_action_flush(net, tb[1], n, portid);
1022 else
1023 return -EINVAL;
1024 }
1025
1026 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
1027 act = tcf_action_get_1(net, tb[i], n, portid);
1028 if (IS_ERR(act)) {
1029 ret = PTR_ERR(act);
1030 goto err;
1031 }
1032 act->order = i;
1033 list_add_tail(&act->list, &actions);
1034 }
1035
1036 if (event == RTM_GETACTION)
1037 ret = tcf_get_notify(net, portid, n, &actions, event);
1038 else { /* delete */
1039 ret = tcf_del_notify(net, n, &actions, portid);
1040 if (ret)
1041 goto err;
1042 return ret;
1043 }
1044 err:
1045 if (event != RTM_GETACTION)
1046 tcf_action_destroy(&actions, 0);
1047 return ret;
1048 }
1049
1050 static int
1051 tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
1052 u32 portid)
1053 {
1054 struct sk_buff *skb;
1055 int err = 0;
1056
1057 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1058 if (!skb)
1059 return -ENOBUFS;
1060
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 }
1066
1067 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
1068 n->nlmsg_flags & NLM_F_ECHO);
1069 if (err > 0)
1070 err = 0;
1071 return err;
1072 }
1073
1074 static int tcf_action_add(struct net *net, struct nlattr *nla,
1075 struct nlmsghdr *n, u32 portid, int ovr)
1076 {
1077 int ret = 0;
1078 LIST_HEAD(actions);
1079
1080 ret = tcf_action_init(net, NULL, nla, NULL, NULL, ovr, 0, &actions);
1081 if (ret)
1082 return ret;
1083
1084 return tcf_add_notify(net, n, &actions, portid);
1085 }
1086
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 },
1091 [TCA_ROOT_TIME_DELTA] = { .type = NLA_U32 },
1092 };
1093
1094 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n,
1095 struct netlink_ext_ack *extack)
1096 {
1097 struct net *net = sock_net(skb->sk);
1098 struct nlattr *tca[TCA_ROOT_MAX + 1];
1099 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1100 int ret = 0, ovr = 0;
1101
1102 if ((n->nlmsg_type != RTM_GETACTION) &&
1103 !netlink_capable(skb, CAP_NET_ADMIN))
1104 return -EPERM;
1105
1106 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ROOT_MAX, NULL,
1107 extack);
1108 if (ret < 0)
1109 return ret;
1110
1111 if (tca[TCA_ACT_TAB] == NULL) {
1112 pr_notice("tc_ctl_action: received NO action attribs\n");
1113 return -EINVAL;
1114 }
1115
1116 /* n->nlmsg_flags & NLM_F_CREATE */
1117 switch (n->nlmsg_type) {
1118 case RTM_NEWACTION:
1119 /* we are going to assume all other flags
1120 * imply create only if it doesn't exist
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 */
1125 if (n->nlmsg_flags & NLM_F_REPLACE)
1126 ovr = 1;
1127 replay:
1128 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
1129 if (ret == -EAGAIN)
1130 goto replay;
1131 break;
1132 case RTM_DELACTION:
1133 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1134 portid, RTM_DELACTION);
1135 break;
1136 case RTM_GETACTION:
1137 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1138 portid, RTM_GETACTION);
1139 break;
1140 default:
1141 BUG();
1142 }
1143
1144 return ret;
1145 }
1146
1147 static struct nlattr *find_dump_kind(struct nlattr **nla)
1148 {
1149 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1150 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1151 struct nlattr *kind;
1152
1153 tb1 = nla[TCA_ACT_TAB];
1154 if (tb1 == NULL)
1155 return NULL;
1156
1157 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1158 NLMSG_ALIGN(nla_len(tb1)), NULL, NULL) < 0)
1159 return NULL;
1160
1161 if (tb[1] == NULL)
1162 return NULL;
1163 if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL, NULL) < 0)
1164 return NULL;
1165 kind = tb2[TCA_ACT_KIND];
1166
1167 return kind;
1168 }
1169
1170 static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1171 {
1172 struct net *net = sock_net(skb->sk);
1173 struct nlmsghdr *nlh;
1174 unsigned char *b = skb_tail_pointer(skb);
1175 struct nlattr *nest;
1176 struct tc_action_ops *a_o;
1177 int ret = 0;
1178 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1179 struct nlattr *tb[TCA_ROOT_MAX + 1];
1180 struct nlattr *count_attr = NULL;
1181 unsigned long jiffy_since = 0;
1182 struct nlattr *kind = NULL;
1183 struct nla_bitfield32 bf;
1184 u32 msecs_since = 0;
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;
1191
1192 kind = find_dump_kind(tb);
1193 if (kind == NULL) {
1194 pr_info("tc_dump_action: action bad kind\n");
1195 return 0;
1196 }
1197
1198 a_o = tc_lookup_action(kind);
1199 if (a_o == NULL)
1200 return 0;
1201
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
1208 if (tb[TCA_ROOT_TIME_DELTA]) {
1209 msecs_since = nla_get_u32(tb[TCA_ROOT_TIME_DELTA]);
1210 }
1211
1212 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1213 cb->nlh->nlmsg_type, sizeof(*t), 0);
1214 if (!nlh)
1215 goto out_module_put;
1216
1217 if (msecs_since)
1218 jiffy_since = jiffies - msecs_to_jiffies(msecs_since);
1219
1220 t = nlmsg_data(nlh);
1221 t->tca_family = AF_UNSPEC;
1222 t->tca__pad1 = 0;
1223 t->tca__pad2 = 0;
1224 cb->args[3] = jiffy_since;
1225 count_attr = nla_reserve(skb, TCA_ROOT_COUNT, sizeof(u32));
1226 if (!count_attr)
1227 goto out_module_put;
1228
1229 nest = nla_nest_start(skb, TCA_ACT_TAB);
1230 if (nest == NULL)
1231 goto out_module_put;
1232
1233 ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o);
1234 if (ret < 0)
1235 goto out_module_put;
1236
1237 if (ret > 0) {
1238 nla_nest_end(skb, nest);
1239 ret = skb->len;
1240 act_count = cb->args[1];
1241 memcpy(nla_data(count_attr), &act_count, sizeof(u32));
1242 cb->args[1] = 0;
1243 } else
1244 nlmsg_trim(skb, b);
1245
1246 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1247 if (NETLINK_CB(cb->skb).portid && ret)
1248 nlh->nlmsg_flags |= NLM_F_MULTI;
1249 module_put(a_o->owner);
1250 return skb->len;
1251
1252 out_module_put:
1253 module_put(a_o->owner);
1254 nlmsg_trim(skb, b);
1255 return skb->len;
1256 }
1257
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);
1307 egdev->dev = dev;
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
1471 static int __init tc_action_init(void)
1472 {
1473 int err;
1474
1475 err = register_pernet_subsys(&tcf_action_net_ops);
1476 if (err)
1477 return err;
1478
1479 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, 0);
1480 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, 0);
1481 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1482 0);
1483
1484 return 0;
1485 }
1486
1487 subsys_initcall(tc_action_init);
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