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 tc_action *p = container_of(head, struct tc_action, tcfa_rcu);
34 free_percpu(p->cpu_bstats);
35 free_percpu(p->cpu_qstats);
39 static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p)
41 spin_lock_bh(&hinfo->lock);
42 hlist_del(&p->tcfa_head);
43 spin_unlock_bh(&hinfo->lock);
44 gen_kill_estimator(&p->tcfa_rate_est);
46 * gen_estimator est_timer() might access p->tcfa_lock
47 * or bstats, wait a RCU grace period before freeing p
49 call_rcu(&p->tcfa_rcu, free_tcf);
52 int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
59 else if (strict && p->tcfa_bindcnt > 0)
63 if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
65 p->ops->cleanup(p, bind);
66 tcf_hash_destroy(p->hinfo, p);
73 EXPORT_SYMBOL(__tcf_hash_release);
75 static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
76 struct netlink_callback *cb)
78 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
81 spin_lock_bh(&hinfo->lock);
85 for (i = 0; i < (hinfo->hmask + 1); i++) {
86 struct hlist_head *head;
89 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
91 hlist_for_each_entry_rcu(p, head, tcfa_head) {
96 nest = nla_nest_start(skb, n_i);
99 err = tcf_action_dump_1(skb, p, 0, 0);
102 nlmsg_trim(skb, nest);
105 nla_nest_end(skb, nest);
107 if (n_i >= TCA_ACT_MAX_PRIO)
112 spin_unlock_bh(&hinfo->lock);
118 nla_nest_cancel(skb, nest);
122 static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
123 const struct tc_action_ops *ops)
129 nest = nla_nest_start(skb, 0);
131 goto nla_put_failure;
132 if (nla_put_string(skb, TCA_KIND, ops->kind))
133 goto nla_put_failure;
134 for (i = 0; i < (hinfo->hmask + 1); i++) {
135 struct hlist_head *head;
136 struct hlist_node *n;
139 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
140 hlist_for_each_entry_safe(p, n, head, tcfa_head) {
141 ret = __tcf_hash_release(p, false, true);
142 if (ret == ACT_P_DELETED) {
143 module_put(p->ops->owner);
146 goto nla_put_failure;
149 if (nla_put_u32(skb, TCA_FCNT, n_i))
150 goto nla_put_failure;
151 nla_nest_end(skb, nest);
155 nla_nest_cancel(skb, nest);
159 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
160 struct netlink_callback *cb, int type,
161 const struct tc_action_ops *ops)
163 struct tcf_hashinfo *hinfo = tn->hinfo;
165 if (type == RTM_DELACTION) {
166 return tcf_del_walker(hinfo, skb, ops);
167 } else if (type == RTM_GETACTION) {
168 return tcf_dump_walker(hinfo, skb, cb);
170 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
174 EXPORT_SYMBOL(tcf_generic_walker);
176 static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
178 struct tc_action *p = NULL;
179 struct hlist_head *head;
181 spin_lock_bh(&hinfo->lock);
182 head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
183 hlist_for_each_entry_rcu(p, head, tcfa_head)
184 if (p->tcfa_index == index)
186 spin_unlock_bh(&hinfo->lock);
191 u32 tcf_hash_new_index(struct tc_action_net *tn)
193 struct tcf_hashinfo *hinfo = tn->hinfo;
194 u32 val = hinfo->index;
199 } while (tcf_hash_lookup(val, hinfo));
204 EXPORT_SYMBOL(tcf_hash_new_index);
206 int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
208 struct tcf_hashinfo *hinfo = tn->hinfo;
209 struct tc_action *p = tcf_hash_lookup(index, hinfo);
217 EXPORT_SYMBOL(tcf_hash_search);
219 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
222 struct tcf_hashinfo *hinfo = tn->hinfo;
223 struct tc_action *p = NULL;
225 if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
234 EXPORT_SYMBOL(tcf_hash_check);
236 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
239 gen_kill_estimator(&a->tcfa_rate_est);
240 call_rcu(&a->tcfa_rcu, free_tcf);
242 EXPORT_SYMBOL(tcf_hash_cleanup);
244 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
245 struct tc_action **a, const struct tc_action_ops *ops,
246 int bind, bool cpustats)
248 struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
249 struct tcf_hashinfo *hinfo = tn->hinfo;
259 p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
260 if (!p->cpu_bstats) {
265 p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
266 if (!p->cpu_qstats) {
268 free_percpu(p->cpu_bstats);
272 spin_lock_init(&p->tcfa_lock);
273 INIT_HLIST_NODE(&p->tcfa_head);
274 p->tcfa_index = index ? index : tcf_hash_new_index(tn);
275 p->tcfa_tm.install = jiffies;
276 p->tcfa_tm.lastuse = jiffies;
277 p->tcfa_tm.firstuse = 0;
279 err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
281 &p->tcfa_lock, NULL, est);
283 free_percpu(p->cpu_qstats);
290 INIT_LIST_HEAD(&p->list);
294 EXPORT_SYMBOL(tcf_hash_create);
296 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
298 struct tcf_hashinfo *hinfo = tn->hinfo;
299 unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
301 spin_lock_bh(&hinfo->lock);
302 hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
303 spin_unlock_bh(&hinfo->lock);
305 EXPORT_SYMBOL(tcf_hash_insert);
307 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
308 struct tcf_hashinfo *hinfo)
312 for (i = 0; i < hinfo->hmask + 1; i++) {
314 struct hlist_node *n;
316 hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
319 ret = __tcf_hash_release(p, false, true);
320 if (ret == ACT_P_DELETED)
321 module_put(ops->owner);
328 EXPORT_SYMBOL(tcf_hashinfo_destroy);
330 static LIST_HEAD(act_base);
331 static DEFINE_RWLOCK(act_mod_lock);
333 int tcf_register_action(struct tc_action_ops *act,
334 struct pernet_operations *ops)
336 struct tc_action_ops *a;
339 if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
342 /* We have to register pernet ops before making the action ops visible,
343 * otherwise tcf_action_init_1() could get a partially initialized
346 ret = register_pernet_subsys(ops);
350 write_lock(&act_mod_lock);
351 list_for_each_entry(a, &act_base, head) {
352 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
353 write_unlock(&act_mod_lock);
354 unregister_pernet_subsys(ops);
358 list_add_tail(&act->head, &act_base);
359 write_unlock(&act_mod_lock);
363 EXPORT_SYMBOL(tcf_register_action);
365 int tcf_unregister_action(struct tc_action_ops *act,
366 struct pernet_operations *ops)
368 struct tc_action_ops *a;
371 write_lock(&act_mod_lock);
372 list_for_each_entry(a, &act_base, head) {
374 list_del(&act->head);
379 write_unlock(&act_mod_lock);
381 unregister_pernet_subsys(ops);
384 EXPORT_SYMBOL(tcf_unregister_action);
387 static struct tc_action_ops *tc_lookup_action_n(char *kind)
389 struct tc_action_ops *a, *res = NULL;
392 read_lock(&act_mod_lock);
393 list_for_each_entry(a, &act_base, head) {
394 if (strcmp(kind, a->kind) == 0) {
395 if (try_module_get(a->owner))
400 read_unlock(&act_mod_lock);
405 /* lookup by nlattr */
406 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
408 struct tc_action_ops *a, *res = NULL;
411 read_lock(&act_mod_lock);
412 list_for_each_entry(a, &act_base, head) {
413 if (nla_strcmp(kind, a->kind) == 0) {
414 if (try_module_get(a->owner))
419 read_unlock(&act_mod_lock);
424 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
425 int nr_actions, struct tcf_result *res)
429 if (skb->tc_verd & TC_NCLS) {
430 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
434 for (i = 0; i < nr_actions; i++) {
435 const struct tc_action *a = actions[i];
438 ret = a->ops->act(skb, a, res);
439 if (ret == TC_ACT_REPEAT)
440 goto repeat; /* we need a ttl - JHS */
441 if (ret != TC_ACT_PIPE)
447 EXPORT_SYMBOL(tcf_action_exec);
449 int tcf_action_destroy(struct list_head *actions, int bind)
451 struct tc_action *a, *tmp;
454 list_for_each_entry_safe(a, tmp, actions, list) {
455 ret = __tcf_hash_release(a, bind, true);
456 if (ret == ACT_P_DELETED)
457 module_put(a->ops->owner);
465 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
467 return a->ops->dump(skb, a, bind, ref);
471 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
474 unsigned char *b = skb_tail_pointer(skb);
477 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
478 goto nla_put_failure;
479 if (tcf_action_copy_stats(skb, a, 0))
480 goto nla_put_failure;
481 nest = nla_nest_start(skb, TCA_OPTIONS);
483 goto nla_put_failure;
484 err = tcf_action_dump_old(skb, a, bind, ref);
486 nla_nest_end(skb, nest);
494 EXPORT_SYMBOL(tcf_action_dump_1);
496 int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
503 list_for_each_entry(a, actions, list) {
504 nest = nla_nest_start(skb, a->order);
506 goto nla_put_failure;
507 err = tcf_action_dump_1(skb, a, bind, ref);
510 nla_nest_end(skb, nest);
518 nla_nest_cancel(skb, nest);
522 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
523 struct nlattr *est, char *name, int ovr,
527 struct tc_action_ops *a_o;
528 char act_name[IFNAMSIZ];
529 struct nlattr *tb[TCA_ACT_MAX + 1];
534 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
538 kind = tb[TCA_ACT_KIND];
541 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
545 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
549 a_o = tc_lookup_action_n(act_name);
551 #ifdef CONFIG_MODULES
553 request_module("act_%s", act_name);
556 a_o = tc_lookup_action_n(act_name);
558 /* We dropped the RTNL semaphore in order to
559 * perform the module load. So, even if we
560 * succeeded in loading the module we have to
561 * tell the caller to replay the request. We
562 * indicate this using -EAGAIN.
573 /* backward compatibility for policer */
575 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
577 err = a_o->init(net, nla, est, &a, ovr, bind);
581 /* module count goes up only when brand new policy is created
582 * if it exists and is only bound to in a_o->init() then
583 * ACT_P_CREATED is not returned (a zero is).
585 if (err != ACT_P_CREATED)
586 module_put(a_o->owner);
591 module_put(a_o->owner);
596 static void cleanup_a(struct list_head *actions, int ovr)
603 list_for_each_entry(a, actions, list)
607 int tcf_action_init(struct net *net, struct nlattr *nla, struct nlattr *est,
608 char *name, int ovr, int bind, struct list_head *actions)
610 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
611 struct tc_action *act;
615 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
619 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
620 act = tcf_action_init_1(net, tb[i], est, name, ovr, bind);
628 list_add_tail(&act->list, actions);
631 /* Remove the temp refcnt which was necessary to protect against
632 * destroying an existing action which was being replaced
634 cleanup_a(actions, ovr);
638 tcf_action_destroy(actions, bind);
642 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
651 /* compat_mode being true specifies a call that is supposed
652 * to add additional backward compatibility statistic TLVs.
655 if (p->type == TCA_OLD_COMPAT)
656 err = gnet_stats_start_copy_compat(skb, 0,
664 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
665 &p->tcfa_lock, &d, TCA_ACT_PAD);
670 if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
671 gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 ||
672 gnet_stats_copy_queue(&d, p->cpu_qstats,
674 p->tcfa_qstats.qlen) < 0)
677 if (gnet_stats_finish_copy(&d) < 0)
686 static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
687 u32 portid, u32 seq, u16 flags, int event, int bind,
691 struct nlmsghdr *nlh;
692 unsigned char *b = skb_tail_pointer(skb);
695 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
699 t->tca_family = AF_UNSPEC;
703 nest = nla_nest_start(skb, TCA_ACT_TAB);
707 if (tcf_action_dump(skb, actions, bind, ref) < 0)
710 nla_nest_end(skb, nest);
712 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
721 act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
722 struct list_head *actions, int event)
726 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
729 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
735 return rtnl_unicast(skb, net, portid);
738 static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
739 struct nlmsghdr *n, u32 portid)
741 struct nlattr *tb[TCA_ACT_MAX + 1];
742 const struct tc_action_ops *ops;
747 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
752 if (tb[TCA_ACT_INDEX] == NULL ||
753 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
755 index = nla_get_u32(tb[TCA_ACT_INDEX]);
758 ops = tc_lookup_action(tb[TCA_ACT_KIND]);
759 if (!ops) /* could happen in batch of actions */
762 if (ops->lookup(net, &a, index) == 0)
765 module_put(ops->owner);
769 module_put(ops->owner);
774 static int tca_action_flush(struct net *net, struct nlattr *nla,
775 struct nlmsghdr *n, u32 portid)
779 struct nlmsghdr *nlh;
781 struct netlink_callback dcb;
783 struct nlattr *tb[TCA_ACT_MAX + 1];
784 const struct tc_action_ops *ops;
788 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
790 pr_debug("tca_action_flush: failed skb alloc\n");
794 b = skb_tail_pointer(skb);
796 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
801 kind = tb[TCA_ACT_KIND];
802 ops = tc_lookup_action(kind);
803 if (!ops) /*some idjot trying to flush unknown action */
806 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
811 t->tca_family = AF_UNSPEC;
815 nest = nla_nest_start(skb, TCA_ACT_TAB);
819 err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops);
825 nla_nest_end(skb, nest);
827 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
828 nlh->nlmsg_flags |= NLM_F_ROOT;
829 module_put(ops->owner);
830 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
831 n->nlmsg_flags & NLM_F_ECHO);
838 module_put(ops->owner);
846 tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
852 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
856 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
862 /* now do the delete */
863 ret = tcf_action_destroy(actions, 0);
869 ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
870 n->nlmsg_flags & NLM_F_ECHO);
877 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
878 u32 portid, int event)
881 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
882 struct tc_action *act;
885 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
889 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
891 return tca_action_flush(net, tb[1], n, portid);
896 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
897 act = tcf_action_get_1(net, tb[i], n, portid);
903 if (event == RTM_GETACTION)
905 list_add_tail(&act->list, &actions);
908 if (event == RTM_GETACTION)
909 ret = act_get_notify(net, portid, n, &actions, event);
911 ret = tcf_del_notify(net, n, &actions, portid);
917 tcf_action_destroy(&actions, 0);
922 tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
928 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
932 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
933 RTM_NEWACTION, 0, 0) <= 0) {
938 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
939 n->nlmsg_flags & NLM_F_ECHO);
945 static int tcf_action_add(struct net *net, struct nlattr *nla,
946 struct nlmsghdr *n, u32 portid, int ovr)
951 ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions);
955 return tcf_add_notify(net, n, &actions, portid);
958 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n)
960 struct net *net = sock_net(skb->sk);
961 struct nlattr *tca[TCA_ACT_MAX + 1];
962 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
963 int ret = 0, ovr = 0;
965 if ((n->nlmsg_type != RTM_GETACTION) &&
966 !netlink_capable(skb, CAP_NET_ADMIN))
969 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
973 if (tca[TCA_ACT_TAB] == NULL) {
974 pr_notice("tc_ctl_action: received NO action attribs\n");
978 /* n->nlmsg_flags & NLM_F_CREATE */
979 switch (n->nlmsg_type) {
981 /* we are going to assume all other flags
982 * imply create only if it doesn't exist
983 * Note that CREATE | EXCL implies that
984 * but since we want avoid ambiguity (eg when flags
985 * is zero) then just set this
987 if (n->nlmsg_flags & NLM_F_REPLACE)
990 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
995 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
996 portid, RTM_DELACTION);
999 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1000 portid, RTM_GETACTION);
1009 static struct nlattr *find_dump_kind(const struct nlmsghdr *n)
1011 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1012 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1013 struct nlattr *nla[TCAA_MAX + 1];
1014 struct nlattr *kind;
1016 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1018 tb1 = nla[TCA_ACT_TAB];
1022 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1023 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1028 if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL) < 0)
1030 kind = tb2[TCA_ACT_KIND];
1035 static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1037 struct net *net = sock_net(skb->sk);
1038 struct nlmsghdr *nlh;
1039 unsigned char *b = skb_tail_pointer(skb);
1040 struct nlattr *nest;
1041 struct tc_action_ops *a_o;
1043 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1044 struct nlattr *kind = find_dump_kind(cb->nlh);
1047 pr_info("tc_dump_action: action bad kind\n");
1051 a_o = tc_lookup_action(kind);
1055 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1056 cb->nlh->nlmsg_type, sizeof(*t), 0);
1058 goto out_module_put;
1059 t = nlmsg_data(nlh);
1060 t->tca_family = AF_UNSPEC;
1064 nest = nla_nest_start(skb, TCA_ACT_TAB);
1066 goto out_module_put;
1068 ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o);
1070 goto out_module_put;
1073 nla_nest_end(skb, nest);
1078 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1079 if (NETLINK_CB(cb->skb).portid && ret)
1080 nlh->nlmsg_flags |= NLM_F_MULTI;
1081 module_put(a_o->owner);
1085 module_put(a_o->owner);
1090 static int __init tc_action_init(void)
1092 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1093 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1094 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1100 subsys_initcall(tc_action_init);