2 * net/sched/act_api.c Packet action API.
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.
9 * Author: Jamal Hadi Salim
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 <net/net_namespace.h>
26 #include <net/sch_generic.h>
27 #include <net/act_api.h>
28 #include <net/netlink.h>
30 static void free_tcf(struct rcu_head *head)
32 struct tcf_common *p = container_of(head, struct tcf_common, tcfc_rcu);
34 free_percpu(p->cpu_bstats);
35 free_percpu(p->cpu_qstats);
39 void tcf_hash_destroy(struct tc_action *a)
41 struct tcf_common *p = a->priv;
42 struct tcf_hashinfo *hinfo = a->ops->hinfo;
44 spin_lock_bh(&hinfo->lock);
45 hlist_del(&p->tcfc_head);
46 spin_unlock_bh(&hinfo->lock);
47 gen_kill_estimator(&p->tcfc_bstats,
50 * gen_estimator est_timer() might access p->tcfc_lock
51 * or bstats, wait a RCU grace period before freeing p
53 call_rcu(&p->tcfc_rcu, free_tcf);
55 EXPORT_SYMBOL(tcf_hash_destroy);
57 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict)
59 struct tcf_common *p = a->priv;
65 else if (strict && p->tcfc_bindcnt > 0)
69 if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
71 a->ops->cleanup(a, bind);
79 EXPORT_SYMBOL(__tcf_hash_release);
81 static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb,
84 struct tcf_hashinfo *hinfo = a->ops->hinfo;
85 struct hlist_head *head;
87 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
90 spin_lock_bh(&hinfo->lock);
94 for (i = 0; i < (hinfo->hmask + 1); i++) {
95 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
97 hlist_for_each_entry_rcu(p, head, tcfc_head) {
104 nest = nla_nest_start(skb, a->order);
106 goto nla_put_failure;
107 err = tcf_action_dump_1(skb, a, 0, 0);
110 nlmsg_trim(skb, nest);
113 nla_nest_end(skb, nest);
115 if (n_i >= TCA_ACT_MAX_PRIO)
120 spin_unlock_bh(&hinfo->lock);
126 nla_nest_cancel(skb, nest);
130 static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a)
132 struct tcf_hashinfo *hinfo = a->ops->hinfo;
133 struct hlist_head *head;
134 struct hlist_node *n;
135 struct tcf_common *p;
140 nest = nla_nest_start(skb, a->order);
142 goto nla_put_failure;
143 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
144 goto nla_put_failure;
145 for (i = 0; i < (hinfo->hmask + 1); i++) {
146 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
147 hlist_for_each_entry_safe(p, n, head, tcfc_head) {
149 ret = __tcf_hash_release(a, false, true);
150 if (ret == ACT_P_DELETED) {
151 module_put(a->ops->owner);
154 goto nla_put_failure;
157 if (nla_put_u32(skb, TCA_FCNT, n_i))
158 goto nla_put_failure;
159 nla_nest_end(skb, nest);
163 nla_nest_cancel(skb, nest);
167 static int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
168 int type, struct tc_action *a)
170 if (type == RTM_DELACTION) {
171 return tcf_del_walker(skb, a);
172 } else if (type == RTM_GETACTION) {
173 return tcf_dump_walker(skb, cb, a);
175 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
180 static struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
182 struct tcf_common *p = NULL;
183 struct hlist_head *head;
185 spin_lock_bh(&hinfo->lock);
186 head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
187 hlist_for_each_entry_rcu(p, head, tcfc_head)
188 if (p->tcfc_index == index)
190 spin_unlock_bh(&hinfo->lock);
195 u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo)
197 u32 val = hinfo->index;
202 } while (tcf_hash_lookup(val, hinfo));
207 EXPORT_SYMBOL(tcf_hash_new_index);
209 int tcf_hash_search(struct tc_action *a, u32 index)
211 struct tcf_hashinfo *hinfo = a->ops->hinfo;
212 struct tcf_common *p = tcf_hash_lookup(index, hinfo);
220 EXPORT_SYMBOL(tcf_hash_search);
222 int tcf_hash_check(u32 index, struct tc_action *a, int bind)
224 struct tcf_hashinfo *hinfo = a->ops->hinfo;
225 struct tcf_common *p = NULL;
226 if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
235 EXPORT_SYMBOL(tcf_hash_check);
237 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
239 struct tcf_common *pc = a->priv;
241 gen_kill_estimator(&pc->tcfc_bstats,
243 call_rcu(&pc->tcfc_rcu, free_tcf);
245 EXPORT_SYMBOL(tcf_hash_cleanup);
247 int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
248 int size, int bind, bool cpustats)
250 struct tcf_hashinfo *hinfo = a->ops->hinfo;
251 struct tcf_common *p = kzalloc(size, GFP_KERNEL);
261 p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
262 if (!p->cpu_bstats) {
267 p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
268 if (!p->cpu_qstats) {
270 free_percpu(p->cpu_bstats);
274 spin_lock_init(&p->tcfc_lock);
275 INIT_HLIST_NODE(&p->tcfc_head);
276 p->tcfc_index = index ? index : tcf_hash_new_index(hinfo);
277 p->tcfc_tm.install = jiffies;
278 p->tcfc_tm.lastuse = jiffies;
280 err = gen_new_estimator(&p->tcfc_bstats, p->cpu_bstats,
284 free_percpu(p->cpu_qstats);
289 a->priv = (void *) p;
292 EXPORT_SYMBOL(tcf_hash_create);
294 void tcf_hash_insert(struct tc_action *a)
296 struct tcf_common *p = a->priv;
297 struct tcf_hashinfo *hinfo = a->ops->hinfo;
298 unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
300 spin_lock_bh(&hinfo->lock);
301 hlist_add_head(&p->tcfc_head, &hinfo->htab[h]);
302 spin_unlock_bh(&hinfo->lock);
304 EXPORT_SYMBOL(tcf_hash_insert);
306 static LIST_HEAD(act_base);
307 static DEFINE_RWLOCK(act_mod_lock);
309 int tcf_register_action(struct tc_action_ops *act, unsigned int mask)
311 struct tc_action_ops *a;
314 /* Must supply act, dump and init */
315 if (!act->act || !act->dump || !act->init)
318 /* Supply defaults */
320 act->lookup = tcf_hash_search;
322 act->walk = tcf_generic_walker;
324 act->hinfo = kmalloc(sizeof(struct tcf_hashinfo), GFP_KERNEL);
327 err = tcf_hashinfo_init(act->hinfo, mask);
333 write_lock(&act_mod_lock);
334 list_for_each_entry(a, &act_base, head) {
335 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
336 write_unlock(&act_mod_lock);
337 tcf_hashinfo_destroy(act->hinfo);
342 list_add_tail(&act->head, &act_base);
343 write_unlock(&act_mod_lock);
346 EXPORT_SYMBOL(tcf_register_action);
348 int tcf_unregister_action(struct tc_action_ops *act)
350 struct tc_action_ops *a;
353 write_lock(&act_mod_lock);
354 list_for_each_entry(a, &act_base, head) {
356 list_del(&act->head);
357 tcf_hashinfo_destroy(act->hinfo);
363 write_unlock(&act_mod_lock);
366 EXPORT_SYMBOL(tcf_unregister_action);
369 static struct tc_action_ops *tc_lookup_action_n(char *kind)
371 struct tc_action_ops *a, *res = NULL;
374 read_lock(&act_mod_lock);
375 list_for_each_entry(a, &act_base, head) {
376 if (strcmp(kind, a->kind) == 0) {
377 if (try_module_get(a->owner))
382 read_unlock(&act_mod_lock);
387 /* lookup by nlattr */
388 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
390 struct tc_action_ops *a, *res = NULL;
393 read_lock(&act_mod_lock);
394 list_for_each_entry(a, &act_base, head) {
395 if (nla_strcmp(kind, a->kind) == 0) {
396 if (try_module_get(a->owner))
401 read_unlock(&act_mod_lock);
406 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
407 struct tcf_result *res)
409 const struct tc_action *a;
412 if (skb->tc_verd & TC_NCLS) {
413 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
417 list_for_each_entry(a, actions, list) {
419 ret = a->ops->act(skb, a, res);
420 if (ret == TC_ACT_REPEAT)
421 goto repeat; /* we need a ttl - JHS */
422 if (ret != TC_ACT_PIPE)
428 EXPORT_SYMBOL(tcf_action_exec);
430 int tcf_action_destroy(struct list_head *actions, int bind)
432 struct tc_action *a, *tmp;
435 list_for_each_entry_safe(a, tmp, actions, list) {
436 ret = __tcf_hash_release(a, bind, true);
437 if (ret == ACT_P_DELETED)
438 module_put(a->ops->owner);
448 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
450 return a->ops->dump(skb, a, bind, ref);
454 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
457 unsigned char *b = skb_tail_pointer(skb);
460 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
461 goto nla_put_failure;
462 if (tcf_action_copy_stats(skb, a, 0))
463 goto nla_put_failure;
464 nest = nla_nest_start(skb, TCA_OPTIONS);
466 goto nla_put_failure;
467 err = tcf_action_dump_old(skb, a, bind, ref);
469 nla_nest_end(skb, nest);
477 EXPORT_SYMBOL(tcf_action_dump_1);
480 tcf_action_dump(struct sk_buff *skb, struct list_head *actions, int bind, int ref)
486 list_for_each_entry(a, actions, list) {
487 nest = nla_nest_start(skb, a->order);
489 goto nla_put_failure;
490 err = tcf_action_dump_1(skb, a, bind, ref);
493 nla_nest_end(skb, nest);
501 nla_nest_cancel(skb, nest);
505 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
506 struct nlattr *est, char *name, int ovr,
510 struct tc_action_ops *a_o;
511 char act_name[IFNAMSIZ];
512 struct nlattr *tb[TCA_ACT_MAX + 1];
517 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
521 kind = tb[TCA_ACT_KIND];
524 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
528 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
532 a_o = tc_lookup_action_n(act_name);
534 #ifdef CONFIG_MODULES
536 request_module("act_%s", act_name);
539 a_o = tc_lookup_action_n(act_name);
541 /* We dropped the RTNL semaphore in order to
542 * perform the module load. So, even if we
543 * succeeded in loading the module we have to
544 * tell the caller to replay the request. We
545 * indicate this using -EAGAIN.
557 a = kzalloc(sizeof(*a), GFP_KERNEL);
562 INIT_LIST_HEAD(&a->list);
563 /* backward compatibility for policer */
565 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
567 err = a_o->init(net, nla, est, a, ovr, bind);
571 /* module count goes up only when brand new policy is created
572 * if it exists and is only bound to in a_o->init() then
573 * ACT_P_CREATED is not returned (a zero is).
575 if (err != ACT_P_CREATED)
576 module_put(a_o->owner);
583 module_put(a_o->owner);
588 int tcf_action_init(struct net *net, struct nlattr *nla,
589 struct nlattr *est, char *name, int ovr,
590 int bind, struct list_head *actions)
592 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
593 struct tc_action *act;
597 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
601 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
602 act = tcf_action_init_1(net, tb[i], est, name, ovr, bind);
608 list_add_tail(&act->list, actions);
613 tcf_action_destroy(actions, bind);
617 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
622 struct tcf_common *p = a->priv;
627 /* compat_mode being true specifies a call that is supposed
628 * to add additional backward compatibility statistic TLVs.
631 if (a->type == TCA_OLD_COMPAT)
632 err = gnet_stats_start_copy_compat(skb, 0,
633 TCA_STATS, TCA_XSTATS, &p->tcfc_lock, &d);
637 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
643 if (gnet_stats_copy_basic(&d, p->cpu_bstats, &p->tcfc_bstats) < 0 ||
644 gnet_stats_copy_rate_est(&d, &p->tcfc_bstats,
645 &p->tcfc_rate_est) < 0 ||
646 gnet_stats_copy_queue(&d, p->cpu_qstats,
648 p->tcfc_qstats.qlen) < 0)
651 if (gnet_stats_finish_copy(&d) < 0)
661 tca_get_fill(struct sk_buff *skb, struct list_head *actions, u32 portid, u32 seq,
662 u16 flags, int event, int bind, int ref)
665 struct nlmsghdr *nlh;
666 unsigned char *b = skb_tail_pointer(skb);
669 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
673 t->tca_family = AF_UNSPEC;
677 nest = nla_nest_start(skb, TCA_ACT_TAB);
681 if (tcf_action_dump(skb, actions, bind, ref) < 0)
684 nla_nest_end(skb, nest);
686 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
695 act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
696 struct list_head *actions, int event)
700 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
703 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, 0, 0) <= 0) {
708 return rtnl_unicast(skb, net, portid);
711 static struct tc_action *create_a(int i)
713 struct tc_action *act;
715 act = kzalloc(sizeof(*act), GFP_KERNEL);
717 pr_debug("create_a: failed to alloc!\n");
721 INIT_LIST_HEAD(&act->list);
725 static struct tc_action *
726 tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 portid)
728 struct nlattr *tb[TCA_ACT_MAX + 1];
733 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
738 if (tb[TCA_ACT_INDEX] == NULL ||
739 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
741 index = nla_get_u32(tb[TCA_ACT_INDEX]);
749 a->ops = tc_lookup_action(tb[TCA_ACT_KIND]);
750 if (a->ops == NULL) /* could happen in batch of actions */
753 if (a->ops->lookup(a, index) == 0)
756 module_put(a->ops->owner);
760 module_put(a->ops->owner);
767 static void cleanup_a(struct list_head *actions)
769 struct tc_action *a, *tmp;
771 list_for_each_entry_safe(a, tmp, actions, list) {
777 static int tca_action_flush(struct net *net, struct nlattr *nla,
778 struct nlmsghdr *n, u32 portid)
782 struct nlmsghdr *nlh;
784 struct netlink_callback dcb;
786 struct nlattr *tb[TCA_ACT_MAX + 1];
791 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
793 pr_debug("tca_action_flush: failed skb alloc\n");
797 b = skb_tail_pointer(skb);
799 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
804 kind = tb[TCA_ACT_KIND];
805 memset(&a, 0, sizeof(struct tc_action));
806 INIT_LIST_HEAD(&a.list);
807 a.ops = tc_lookup_action(kind);
808 if (a.ops == NULL) /*some idjot trying to flush unknown action */
811 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t), 0);
815 t->tca_family = AF_UNSPEC;
819 nest = nla_nest_start(skb, TCA_ACT_TAB);
823 err = a.ops->walk(skb, &dcb, RTM_DELACTION, &a);
829 nla_nest_end(skb, nest);
831 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
832 nlh->nlmsg_flags |= NLM_F_ROOT;
833 module_put(a.ops->owner);
834 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
835 n->nlmsg_flags & NLM_F_ECHO);
842 module_put(a.ops->owner);
850 tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
856 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
860 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
866 /* now do the delete */
867 ret = tcf_action_destroy(actions, 0);
873 ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
874 n->nlmsg_flags & NLM_F_ECHO);
881 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
882 u32 portid, int event)
885 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
886 struct tc_action *act;
889 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
893 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
895 return tca_action_flush(net, tb[1], n, portid);
900 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
901 act = tcf_action_get_1(tb[i], n, portid);
907 list_add_tail(&act->list, &actions);
910 if (event == RTM_GETACTION)
911 ret = act_get_notify(net, portid, n, &actions, event);
913 ret = tcf_del_notify(net, n, &actions, portid);
924 tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
930 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
934 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
935 RTM_NEWACTION, 0, 0) <= 0) {
940 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
941 n->nlmsg_flags & NLM_F_ECHO);
948 tcf_action_add(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
954 ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions);
958 /* dump then free all the actions after update; inserted policy
961 ret = tcf_add_notify(net, n, &actions, portid);
967 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n)
969 struct net *net = sock_net(skb->sk);
970 struct nlattr *tca[TCA_ACT_MAX + 1];
971 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
972 int ret = 0, ovr = 0;
974 if ((n->nlmsg_type != RTM_GETACTION) && !netlink_capable(skb, CAP_NET_ADMIN))
977 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
981 if (tca[TCA_ACT_TAB] == NULL) {
982 pr_notice("tc_ctl_action: received NO action attribs\n");
986 /* n->nlmsg_flags & NLM_F_CREATE */
987 switch (n->nlmsg_type) {
989 /* we are going to assume all other flags
990 * imply create only if it doesn't exist
991 * Note that CREATE | EXCL implies that
992 * but since we want avoid ambiguity (eg when flags
993 * is zero) then just set this
995 if (n->nlmsg_flags & NLM_F_REPLACE)
998 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
1003 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1004 portid, RTM_DELACTION);
1007 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1008 portid, RTM_GETACTION);
1017 static struct nlattr *
1018 find_dump_kind(const struct nlmsghdr *n)
1020 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1021 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1022 struct nlattr *nla[TCAA_MAX + 1];
1023 struct nlattr *kind;
1025 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1027 tb1 = nla[TCA_ACT_TAB];
1031 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1032 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1037 if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]),
1038 nla_len(tb[1]), NULL) < 0)
1040 kind = tb2[TCA_ACT_KIND];
1046 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1048 struct nlmsghdr *nlh;
1049 unsigned char *b = skb_tail_pointer(skb);
1050 struct nlattr *nest;
1051 struct tc_action_ops *a_o;
1054 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1055 struct nlattr *kind = find_dump_kind(cb->nlh);
1058 pr_info("tc_dump_action: action bad kind\n");
1062 a_o = tc_lookup_action(kind);
1066 memset(&a, 0, sizeof(struct tc_action));
1069 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1070 cb->nlh->nlmsg_type, sizeof(*t), 0);
1072 goto out_module_put;
1073 t = nlmsg_data(nlh);
1074 t->tca_family = AF_UNSPEC;
1078 nest = nla_nest_start(skb, TCA_ACT_TAB);
1080 goto out_module_put;
1082 ret = a_o->walk(skb, cb, RTM_GETACTION, &a);
1084 goto out_module_put;
1087 nla_nest_end(skb, nest);
1090 nla_nest_cancel(skb, nest);
1092 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1093 if (NETLINK_CB(cb->skb).portid && ret)
1094 nlh->nlmsg_flags |= NLM_F_MULTI;
1095 module_put(a_o->owner);
1099 module_put(a_o->owner);
1104 static int __init tc_action_init(void)
1106 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1107 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1108 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1114 subsys_initcall(tc_action_init);