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 <net/net_namespace.h>
25 #include <net/sch_generic.h>
26 #include <net/act_api.h>
27 #include <net/netlink.h>
29 void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo)
31 unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
32 struct tcf_common **p1p;
34 for (p1p = &hinfo->htab[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
36 write_lock_bh(hinfo->lock);
38 write_unlock_bh(hinfo->lock);
39 gen_kill_estimator(&p->tcfc_bstats,
42 * gen_estimator est_timer() might access p->tcfc_lock
43 * or bstats, wait a RCU grace period before freeing p
45 kfree_rcu(p, tcfc_rcu);
51 EXPORT_SYMBOL(tcf_hash_destroy);
53 int tcf_hash_release(struct tcf_common *p, int bind,
54 struct tcf_hashinfo *hinfo)
63 if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
64 tcf_hash_destroy(p, hinfo);
70 EXPORT_SYMBOL(tcf_hash_release);
72 static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb,
73 struct tc_action *a, struct tcf_hashinfo *hinfo)
76 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
79 read_lock_bh(hinfo->lock);
83 for (i = 0; i < (hinfo->hmask + 1); i++) {
84 p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
86 for (; p; p = p->tcfc_next) {
93 nest = nla_nest_start(skb, a->order);
96 err = tcf_action_dump_1(skb, a, 0, 0);
99 nlmsg_trim(skb, nest);
102 nla_nest_end(skb, nest);
104 if (n_i >= TCA_ACT_MAX_PRIO)
109 read_unlock_bh(hinfo->lock);
115 nla_nest_cancel(skb, nest);
119 static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a,
120 struct tcf_hashinfo *hinfo)
122 struct tcf_common *p, *s_p;
126 nest = nla_nest_start(skb, a->order);
128 goto nla_put_failure;
129 NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind);
130 for (i = 0; i < (hinfo->hmask + 1); i++) {
131 p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
135 if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo))
136 module_put(a->ops->owner);
141 NLA_PUT_U32(skb, TCA_FCNT, n_i);
142 nla_nest_end(skb, nest);
146 nla_nest_cancel(skb, nest);
150 int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
151 int type, struct tc_action *a)
153 struct tcf_hashinfo *hinfo = a->ops->hinfo;
155 if (type == RTM_DELACTION) {
156 return tcf_del_walker(skb, a, hinfo);
157 } else if (type == RTM_GETACTION) {
158 return tcf_dump_walker(skb, cb, a, hinfo);
160 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
164 EXPORT_SYMBOL(tcf_generic_walker);
166 struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
168 struct tcf_common *p;
170 read_lock_bh(hinfo->lock);
171 for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p;
173 if (p->tcfc_index == index)
176 read_unlock_bh(hinfo->lock);
180 EXPORT_SYMBOL(tcf_hash_lookup);
182 u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo)
189 } while (tcf_hash_lookup(val, hinfo));
191 return (*idx_gen = val);
193 EXPORT_SYMBOL(tcf_hash_new_index);
195 int tcf_hash_search(struct tc_action *a, u32 index)
197 struct tcf_hashinfo *hinfo = a->ops->hinfo;
198 struct tcf_common *p = tcf_hash_lookup(index, hinfo);
206 EXPORT_SYMBOL(tcf_hash_search);
208 struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, int bind,
209 struct tcf_hashinfo *hinfo)
211 struct tcf_common *p = NULL;
212 if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
220 EXPORT_SYMBOL(tcf_hash_check);
222 struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
223 struct tc_action *a, int size, int bind,
224 u32 *idx_gen, struct tcf_hashinfo *hinfo)
226 struct tcf_common *p = kzalloc(size, GFP_KERNEL);
229 return ERR_PTR(-ENOMEM);
234 spin_lock_init(&p->tcfc_lock);
235 p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo);
236 p->tcfc_tm.install = jiffies;
237 p->tcfc_tm.lastuse = jiffies;
239 int err = gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est,
247 a->priv = (void *) p;
250 EXPORT_SYMBOL(tcf_hash_create);
252 void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo)
254 unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
256 write_lock_bh(hinfo->lock);
257 p->tcfc_next = hinfo->htab[h];
259 write_unlock_bh(hinfo->lock);
261 EXPORT_SYMBOL(tcf_hash_insert);
263 static struct tc_action_ops *act_base = NULL;
264 static DEFINE_RWLOCK(act_mod_lock);
266 int tcf_register_action(struct tc_action_ops *act)
268 struct tc_action_ops *a, **ap;
270 write_lock(&act_mod_lock);
271 for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) {
272 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
273 write_unlock(&act_mod_lock);
279 write_unlock(&act_mod_lock);
282 EXPORT_SYMBOL(tcf_register_action);
284 int tcf_unregister_action(struct tc_action_ops *act)
286 struct tc_action_ops *a, **ap;
289 write_lock(&act_mod_lock);
290 for (ap = &act_base; (a = *ap) != NULL; ap = &a->next)
298 write_unlock(&act_mod_lock);
301 EXPORT_SYMBOL(tcf_unregister_action);
304 static struct tc_action_ops *tc_lookup_action_n(char *kind)
306 struct tc_action_ops *a = NULL;
309 read_lock(&act_mod_lock);
310 for (a = act_base; a; a = a->next) {
311 if (strcmp(kind, a->kind) == 0) {
312 if (!try_module_get(a->owner)) {
313 read_unlock(&act_mod_lock);
319 read_unlock(&act_mod_lock);
324 /* lookup by nlattr */
325 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
327 struct tc_action_ops *a = NULL;
330 read_lock(&act_mod_lock);
331 for (a = act_base; a; a = a->next) {
332 if (nla_strcmp(kind, a->kind) == 0) {
333 if (!try_module_get(a->owner)) {
334 read_unlock(&act_mod_lock);
340 read_unlock(&act_mod_lock);
347 static struct tc_action_ops *tc_lookup_action_id(u32 type)
349 struct tc_action_ops *a = NULL;
352 read_lock(&act_mod_lock);
353 for (a = act_base; a; a = a->next) {
354 if (a->type == type) {
355 if (!try_module_get(a->owner)) {
356 read_unlock(&act_mod_lock);
362 read_unlock(&act_mod_lock);
368 int tcf_action_exec(struct sk_buff *skb, const struct tc_action *act,
369 struct tcf_result *res)
371 const struct tc_action *a;
374 if (skb->tc_verd & TC_NCLS) {
375 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
379 while ((a = act) != NULL) {
381 if (a->ops && a->ops->act) {
382 ret = a->ops->act(skb, a, res);
383 if (TC_MUNGED & skb->tc_verd) {
384 /* copied already, allow trampling */
385 skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
386 skb->tc_verd = CLR_TC_MUNGED(skb->tc_verd);
388 if (ret == TC_ACT_REPEAT)
389 goto repeat; /* we need a ttl - JHS */
390 if (ret != TC_ACT_PIPE)
398 EXPORT_SYMBOL(tcf_action_exec);
400 void tcf_action_destroy(struct tc_action *act, int bind)
404 for (a = act; a; a = act) {
405 if (a->ops && a->ops->cleanup) {
406 if (a->ops->cleanup(a, bind) == ACT_P_DELETED)
407 module_put(a->ops->owner);
411 /*FIXME: Remove later - catch insertion bugs*/
412 WARN(1, "tcf_action_destroy: BUG? destroying NULL ops\n");
420 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
424 if (a->ops == NULL || a->ops->dump == NULL)
426 return a->ops->dump(skb, a, bind, ref);
430 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
433 unsigned char *b = skb_tail_pointer(skb);
436 if (a->ops == NULL || a->ops->dump == NULL)
439 NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind);
440 if (tcf_action_copy_stats(skb, a, 0))
441 goto nla_put_failure;
442 nest = nla_nest_start(skb, TCA_OPTIONS);
444 goto nla_put_failure;
445 err = tcf_action_dump_old(skb, a, bind, ref);
447 nla_nest_end(skb, nest);
455 EXPORT_SYMBOL(tcf_action_dump_1);
458 tcf_action_dump(struct sk_buff *skb, struct tc_action *act, int bind, int ref)
464 while ((a = act) != NULL) {
466 nest = nla_nest_start(skb, a->order);
468 goto nla_put_failure;
469 err = tcf_action_dump_1(skb, a, bind, ref);
472 nla_nest_end(skb, nest);
480 nla_nest_cancel(skb, nest);
484 struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est,
485 char *name, int ovr, int bind)
488 struct tc_action_ops *a_o;
489 char act_name[IFNAMSIZ];
490 struct nlattr *tb[TCA_ACT_MAX + 1];
495 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
499 kind = tb[TCA_ACT_KIND];
502 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
506 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
510 a_o = tc_lookup_action_n(act_name);
512 #ifdef CONFIG_MODULES
514 request_module("act_%s", act_name);
517 a_o = tc_lookup_action_n(act_name);
519 /* We dropped the RTNL semaphore in order to
520 * perform the module load. So, even if we
521 * succeeded in loading the module we have to
522 * tell the caller to replay the request. We
523 * indicate this using -EAGAIN.
535 a = kzalloc(sizeof(*a), GFP_KERNEL);
539 /* backward compatibility for policer */
541 err = a_o->init(tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
543 err = a_o->init(nla, est, a, ovr, bind);
547 /* module count goes up only when brand new policy is created
548 * if it exists and is only bound to in a_o->init() then
549 * ACT_P_CREATED is not returned (a zero is).
551 if (err != ACT_P_CREATED)
552 module_put(a_o->owner);
560 module_put(a_o->owner);
565 struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est,
566 char *name, int ovr, int bind)
568 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
569 struct tc_action *head = NULL, *act, *act_prev = NULL;
573 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
577 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
578 act = tcf_action_init_1(tb[i], est, name, ovr, bind);
586 act_prev->next = act;
593 tcf_action_destroy(head, bind);
597 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
602 struct tcf_act_hdr *h = a->priv;
607 /* compat_mode being true specifies a call that is supposed
608 * to add additional backward compatibility statistic TLVs.
611 if (a->type == TCA_OLD_COMPAT)
612 err = gnet_stats_start_copy_compat(skb, 0,
613 TCA_STATS, TCA_XSTATS, &h->tcf_lock, &d);
617 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
623 if (a->ops != NULL && a->ops->get_stats != NULL)
624 if (a->ops->get_stats(skb, a) < 0)
627 if (gnet_stats_copy_basic(&d, &h->tcf_bstats) < 0 ||
628 gnet_stats_copy_rate_est(&d, &h->tcf_bstats,
629 &h->tcf_rate_est) < 0 ||
630 gnet_stats_copy_queue(&d, &h->tcf_qstats) < 0)
633 if (gnet_stats_finish_copy(&d) < 0)
643 tca_get_fill(struct sk_buff *skb, struct tc_action *a, u32 pid, u32 seq,
644 u16 flags, int event, int bind, int ref)
647 struct nlmsghdr *nlh;
648 unsigned char *b = skb_tail_pointer(skb);
651 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags);
654 t->tca_family = AF_UNSPEC;
658 nest = nla_nest_start(skb, TCA_ACT_TAB);
660 goto nla_put_failure;
662 if (tcf_action_dump(skb, a, bind, ref) < 0)
663 goto nla_put_failure;
665 nla_nest_end(skb, nest);
667 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
677 act_get_notify(struct net *net, u32 pid, struct nlmsghdr *n,
678 struct tc_action *a, int event)
682 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
685 if (tca_get_fill(skb, a, pid, n->nlmsg_seq, 0, event, 0, 0) <= 0) {
690 return rtnl_unicast(skb, net, pid);
693 static struct tc_action *
694 tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 pid)
696 struct nlattr *tb[TCA_ACT_MAX + 1];
701 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
706 if (tb[TCA_ACT_INDEX] == NULL ||
707 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
709 index = nla_get_u32(tb[TCA_ACT_INDEX]);
712 a = kzalloc(sizeof(struct tc_action), GFP_KERNEL);
717 a->ops = tc_lookup_action(tb[TCA_ACT_KIND]);
720 if (a->ops->lookup == NULL)
723 if (a->ops->lookup(a, index) == 0)
726 module_put(a->ops->owner);
730 module_put(a->ops->owner);
737 static void cleanup_a(struct tc_action *act)
741 for (a = act; a; a = act) {
747 static struct tc_action *create_a(int i)
749 struct tc_action *act;
751 act = kzalloc(sizeof(*act), GFP_KERNEL);
753 pr_debug("create_a: failed to alloc!\n");
760 static int tca_action_flush(struct net *net, struct nlattr *nla,
761 struct nlmsghdr *n, u32 pid)
765 struct nlmsghdr *nlh;
767 struct netlink_callback dcb;
769 struct nlattr *tb[TCA_ACT_MAX + 1];
771 struct tc_action *a = create_a(0);
775 pr_debug("tca_action_flush: couldnt create tc_action\n");
779 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
781 pr_debug("tca_action_flush: failed skb alloc\n");
786 b = skb_tail_pointer(skb);
788 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
793 kind = tb[TCA_ACT_KIND];
794 a->ops = tc_lookup_action(kind);
798 nlh = NLMSG_PUT(skb, pid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t));
800 t->tca_family = AF_UNSPEC;
804 nest = nla_nest_start(skb, TCA_ACT_TAB);
806 goto nla_put_failure;
808 err = a->ops->walk(skb, &dcb, RTM_DELACTION, a);
810 goto nla_put_failure;
814 nla_nest_end(skb, nest);
816 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
817 nlh->nlmsg_flags |= NLM_F_ROOT;
818 module_put(a->ops->owner);
820 err = rtnetlink_send(skb, net, pid, RTNLGRP_TC,
821 n->nlmsg_flags & NLM_F_ECHO);
829 module_put(a->ops->owner);
838 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
842 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
843 struct tc_action *head = NULL, *act, *act_prev = NULL;
845 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
849 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
851 return tca_action_flush(net, tb[1], n, pid);
856 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
857 act = tcf_action_get_1(tb[i], n, pid);
867 act_prev->next = act;
871 if (event == RTM_GETACTION)
872 ret = act_get_notify(net, pid, n, head, event);
876 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
882 if (tca_get_fill(skb, head, pid, n->nlmsg_seq, 0, event,
889 /* now do the delete */
890 tcf_action_destroy(head, 0);
891 ret = rtnetlink_send(skb, net, pid, RTNLGRP_TC,
892 n->nlmsg_flags & NLM_F_ECHO);
902 static int tcf_add_notify(struct net *net, struct tc_action *a,
903 u32 pid, u32 seq, int event, u16 flags)
906 struct nlmsghdr *nlh;
912 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
916 b = skb_tail_pointer(skb);
918 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags);
920 t->tca_family = AF_UNSPEC;
924 nest = nla_nest_start(skb, TCA_ACT_TAB);
926 goto nla_put_failure;
928 if (tcf_action_dump(skb, a, 0, 0) < 0)
929 goto nla_put_failure;
931 nla_nest_end(skb, nest);
933 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
934 NETLINK_CB(skb).dst_group = RTNLGRP_TC;
936 err = rtnetlink_send(skb, net, pid, RTNLGRP_TC, flags & NLM_F_ECHO);
949 tcf_action_add(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
953 struct tc_action *act;
955 u32 seq = n->nlmsg_seq;
957 act = tcf_action_init(nla, NULL, NULL, ovr, 0);
965 /* dump then free all the actions after update; inserted policy
968 ret = tcf_add_notify(net, act, pid, seq, RTM_NEWACTION, n->nlmsg_flags);
969 for (a = act; a; a = act) {
977 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
979 struct net *net = sock_net(skb->sk);
980 struct nlattr *tca[TCA_ACT_MAX + 1];
981 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
982 int ret = 0, ovr = 0;
984 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
988 if (tca[TCA_ACT_TAB] == NULL) {
989 pr_notice("tc_ctl_action: received NO action attribs\n");
993 /* n->nlmsg_flags & NLM_F_CREATE */
994 switch (n->nlmsg_type) {
996 /* we are going to assume all other flags
997 * imply create only if it doesn't exist
998 * Note that CREATE | EXCL implies that
999 * but since we want avoid ambiguity (eg when flags
1000 * is zero) then just set this
1002 if (n->nlmsg_flags & NLM_F_REPLACE)
1005 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, pid, ovr);
1010 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1011 pid, RTM_DELACTION);
1014 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1015 pid, RTM_GETACTION);
1024 static struct nlattr *
1025 find_dump_kind(const struct nlmsghdr *n)
1027 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1028 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1029 struct nlattr *nla[TCAA_MAX + 1];
1030 struct nlattr *kind;
1032 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1034 tb1 = nla[TCA_ACT_TAB];
1038 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1039 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1044 if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]),
1045 nla_len(tb[1]), NULL) < 0)
1047 kind = tb2[TCA_ACT_KIND];
1053 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1055 struct nlmsghdr *nlh;
1056 unsigned char *b = skb_tail_pointer(skb);
1057 struct nlattr *nest;
1058 struct tc_action_ops *a_o;
1061 struct tcamsg *t = (struct tcamsg *) NLMSG_DATA(cb->nlh);
1062 struct nlattr *kind = find_dump_kind(cb->nlh);
1065 pr_info("tc_dump_action: action bad kind\n");
1069 a_o = tc_lookup_action(kind);
1073 memset(&a, 0, sizeof(struct tc_action));
1076 if (a_o->walk == NULL) {
1077 WARN(1, "tc_dump_action: %s !capable of dumping table\n",
1079 goto nla_put_failure;
1082 nlh = NLMSG_PUT(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
1083 cb->nlh->nlmsg_type, sizeof(*t));
1084 t = NLMSG_DATA(nlh);
1085 t->tca_family = AF_UNSPEC;
1089 nest = nla_nest_start(skb, TCA_ACT_TAB);
1091 goto nla_put_failure;
1093 ret = a_o->walk(skb, cb, RTM_GETACTION, &a);
1095 goto nla_put_failure;
1098 nla_nest_end(skb, nest);
1101 nla_nest_cancel(skb, nest);
1103 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1104 if (NETLINK_CB(cb->skb).pid && ret)
1105 nlh->nlmsg_flags |= NLM_F_MULTI;
1106 module_put(a_o->owner);
1111 module_put(a_o->owner);
1116 static int __init tc_action_init(void)
1118 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1119 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1120 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1126 subsys_initcall(tc_action_init);