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_bstats,
47 * gen_estimator est_timer() might access p->tcfa_lock
48 * or bstats, wait a RCU grace period before freeing p
50 call_rcu(&p->tcfa_rcu, free_tcf);
53 int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
60 else if (strict && p->tcfa_bindcnt > 0)
64 if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
66 p->ops->cleanup(p, bind);
67 tcf_hash_destroy(p->hinfo, p);
74 EXPORT_SYMBOL(__tcf_hash_release);
76 static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
77 struct netlink_callback *cb)
79 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
82 spin_lock_bh(&hinfo->lock);
86 for (i = 0; i < (hinfo->hmask + 1); i++) {
87 struct hlist_head *head;
90 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
92 hlist_for_each_entry_rcu(p, head, tcfa_head) {
97 nest = nla_nest_start(skb, n_i);
100 goto nla_put_failure;
102 err = tcf_action_dump_1(skb, p, 0, 0);
105 nlmsg_trim(skb, nest);
108 nla_nest_end(skb, nest);
110 if (n_i >= TCA_ACT_MAX_PRIO)
115 spin_unlock_bh(&hinfo->lock);
121 nla_nest_cancel(skb, nest);
125 static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
126 const struct tc_action_ops *ops)
132 nest = nla_nest_start(skb, 0);
134 goto nla_put_failure;
135 if (nla_put_string(skb, TCA_KIND, ops->kind))
136 goto nla_put_failure;
137 for (i = 0; i < (hinfo->hmask + 1); i++) {
138 struct hlist_head *head;
139 struct hlist_node *n;
142 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
143 hlist_for_each_entry_safe(p, n, head, tcfa_head) {
144 ret = __tcf_hash_release(p, false, true);
145 if (ret == ACT_P_DELETED) {
146 module_put(ops->owner);
149 goto nla_put_failure;
152 if (nla_put_u32(skb, TCA_FCNT, n_i))
153 goto nla_put_failure;
154 nla_nest_end(skb, nest);
158 nla_nest_cancel(skb, nest);
162 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
163 struct netlink_callback *cb, int type,
164 const struct tc_action_ops *ops)
166 struct tcf_hashinfo *hinfo = tn->hinfo;
168 if (type == RTM_DELACTION) {
169 return tcf_del_walker(hinfo, skb, ops);
170 } else if (type == RTM_GETACTION) {
171 return tcf_dump_walker(hinfo, skb, cb);
173 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
177 EXPORT_SYMBOL(tcf_generic_walker);
179 static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
181 struct tc_action *p = NULL;
182 struct hlist_head *head;
184 spin_lock_bh(&hinfo->lock);
185 head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
186 hlist_for_each_entry_rcu(p, head, tcfa_head)
187 if (p->tcfa_index == index)
189 spin_unlock_bh(&hinfo->lock);
194 u32 tcf_hash_new_index(struct tc_action_net *tn)
196 struct tcf_hashinfo *hinfo = tn->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_net *tn, struct tc_action **a, u32 index)
211 struct tcf_hashinfo *hinfo = tn->hinfo;
212 struct tc_action *p = tcf_hash_lookup(index, hinfo);
220 EXPORT_SYMBOL(tcf_hash_search);
222 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
225 struct tcf_hashinfo *hinfo = tn->hinfo;
226 struct tc_action *p = NULL;
228 if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
237 EXPORT_SYMBOL(tcf_hash_check);
239 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
242 gen_kill_estimator(&a->tcfa_bstats,
244 call_rcu(&a->tcfa_rcu, free_tcf);
246 EXPORT_SYMBOL(tcf_hash_cleanup);
248 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
249 struct tc_action **a, const struct tc_action_ops *ops,
250 int bind, bool cpustats)
252 struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
253 struct tcf_hashinfo *hinfo = tn->hinfo;
263 p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
264 if (!p->cpu_bstats) {
269 p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
270 if (!p->cpu_qstats) {
272 free_percpu(p->cpu_bstats);
276 spin_lock_init(&p->tcfa_lock);
277 INIT_HLIST_NODE(&p->tcfa_head);
278 p->tcfa_index = index ? index : tcf_hash_new_index(tn);
279 p->tcfa_tm.install = jiffies;
280 p->tcfa_tm.lastuse = jiffies;
281 p->tcfa_tm.firstuse = 0;
283 err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
285 &p->tcfa_lock, NULL, est);
287 free_percpu(p->cpu_qstats);
294 INIT_LIST_HEAD(&p->list);
298 EXPORT_SYMBOL(tcf_hash_create);
300 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
302 struct tcf_hashinfo *hinfo = tn->hinfo;
303 unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
305 spin_lock_bh(&hinfo->lock);
306 hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
307 spin_unlock_bh(&hinfo->lock);
309 EXPORT_SYMBOL(tcf_hash_insert);
311 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
312 struct tcf_hashinfo *hinfo)
316 for (i = 0; i < hinfo->hmask + 1; i++) {
318 struct hlist_node *n;
320 hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
323 ret = __tcf_hash_release(p, false, true);
324 if (ret == ACT_P_DELETED)
325 module_put(ops->owner);
332 EXPORT_SYMBOL(tcf_hashinfo_destroy);
334 static LIST_HEAD(act_base);
335 static DEFINE_RWLOCK(act_mod_lock);
337 int tcf_register_action(struct tc_action_ops *act,
338 struct pernet_operations *ops)
340 struct tc_action_ops *a;
343 if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
346 /* We have to register pernet ops before making the action ops visible,
347 * otherwise tcf_action_init_1() could get a partially initialized
350 ret = register_pernet_subsys(ops);
354 write_lock(&act_mod_lock);
355 list_for_each_entry(a, &act_base, head) {
356 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
357 write_unlock(&act_mod_lock);
358 unregister_pernet_subsys(ops);
362 list_add_tail(&act->head, &act_base);
363 write_unlock(&act_mod_lock);
367 EXPORT_SYMBOL(tcf_register_action);
369 int tcf_unregister_action(struct tc_action_ops *act,
370 struct pernet_operations *ops)
372 struct tc_action_ops *a;
375 write_lock(&act_mod_lock);
376 list_for_each_entry(a, &act_base, head) {
378 list_del(&act->head);
383 write_unlock(&act_mod_lock);
385 unregister_pernet_subsys(ops);
388 EXPORT_SYMBOL(tcf_unregister_action);
391 static struct tc_action_ops *tc_lookup_action_n(char *kind)
393 struct tc_action_ops *a, *res = NULL;
396 read_lock(&act_mod_lock);
397 list_for_each_entry(a, &act_base, head) {
398 if (strcmp(kind, a->kind) == 0) {
399 if (try_module_get(a->owner))
404 read_unlock(&act_mod_lock);
409 /* lookup by nlattr */
410 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
412 struct tc_action_ops *a, *res = NULL;
415 read_lock(&act_mod_lock);
416 list_for_each_entry(a, &act_base, head) {
417 if (nla_strcmp(kind, a->kind) == 0) {
418 if (try_module_get(a->owner))
423 read_unlock(&act_mod_lock);
428 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
429 int nr_actions, struct tcf_result *res)
433 if (skb->tc_verd & TC_NCLS) {
434 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
438 for (i = 0; i < nr_actions; i++) {
439 const struct tc_action *a = actions[i];
442 ret = a->ops->act(skb, a, res);
443 if (ret == TC_ACT_REPEAT)
444 goto repeat; /* we need a ttl - JHS */
445 if (ret != TC_ACT_PIPE)
451 EXPORT_SYMBOL(tcf_action_exec);
453 int tcf_action_destroy(struct list_head *actions, int bind)
455 const struct tc_action_ops *ops;
456 struct tc_action *a, *tmp;
459 list_for_each_entry_safe(a, tmp, actions, list) {
461 ret = __tcf_hash_release(a, bind, true);
462 if (ret == ACT_P_DELETED)
463 module_put(ops->owner);
471 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
473 return a->ops->dump(skb, a, bind, ref);
477 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
480 unsigned char *b = skb_tail_pointer(skb);
483 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
484 goto nla_put_failure;
485 if (tcf_action_copy_stats(skb, a, 0))
486 goto nla_put_failure;
487 nest = nla_nest_start(skb, TCA_OPTIONS);
489 goto nla_put_failure;
490 err = tcf_action_dump_old(skb, a, bind, ref);
492 nla_nest_end(skb, nest);
500 EXPORT_SYMBOL(tcf_action_dump_1);
502 int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
509 list_for_each_entry(a, actions, list) {
510 nest = nla_nest_start(skb, a->order);
512 goto nla_put_failure;
513 err = tcf_action_dump_1(skb, a, bind, ref);
516 nla_nest_end(skb, nest);
524 nla_nest_cancel(skb, nest);
528 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
529 struct nlattr *est, char *name, int ovr,
533 struct tc_action_ops *a_o;
534 char act_name[IFNAMSIZ];
535 struct nlattr *tb[TCA_ACT_MAX + 1];
540 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
544 kind = tb[TCA_ACT_KIND];
547 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
551 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
555 a_o = tc_lookup_action_n(act_name);
557 #ifdef CONFIG_MODULES
559 request_module("act_%s", act_name);
562 a_o = tc_lookup_action_n(act_name);
564 /* We dropped the RTNL semaphore in order to
565 * perform the module load. So, even if we
566 * succeeded in loading the module we have to
567 * tell the caller to replay the request. We
568 * indicate this using -EAGAIN.
579 /* backward compatibility for policer */
581 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
583 err = a_o->init(net, nla, est, &a, ovr, bind);
587 /* module count goes up only when brand new policy is created
588 * if it exists and is only bound to in a_o->init() then
589 * ACT_P_CREATED is not returned (a zero is).
591 if (err != ACT_P_CREATED)
592 module_put(a_o->owner);
597 module_put(a_o->owner);
602 static void cleanup_a(struct list_head *actions, int ovr)
609 list_for_each_entry(a, actions, list)
613 int tcf_action_init(struct net *net, struct nlattr *nla, struct nlattr *est,
614 char *name, int ovr, int bind, struct list_head *actions)
616 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
617 struct tc_action *act;
621 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
625 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
626 act = tcf_action_init_1(net, tb[i], est, name, ovr, bind);
634 list_add_tail(&act->list, actions);
637 /* Remove the temp refcnt which was necessary to protect against
638 * destroying an existing action which was being replaced
640 cleanup_a(actions, ovr);
644 tcf_action_destroy(actions, bind);
648 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
657 /* compat_mode being true specifies a call that is supposed
658 * to add additional backward compatibility statistic TLVs.
661 if (p->type == TCA_OLD_COMPAT)
662 err = gnet_stats_start_copy_compat(skb, 0,
670 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
671 &p->tcfa_lock, &d, TCA_ACT_PAD);
676 if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
677 gnet_stats_copy_rate_est(&d, &p->tcfa_bstats,
678 &p->tcfa_rate_est) < 0 ||
679 gnet_stats_copy_queue(&d, p->cpu_qstats,
681 p->tcfa_qstats.qlen) < 0)
684 if (gnet_stats_finish_copy(&d) < 0)
693 static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
694 u32 portid, u32 seq, u16 flags, int event, int bind,
698 struct nlmsghdr *nlh;
699 unsigned char *b = skb_tail_pointer(skb);
702 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
706 t->tca_family = AF_UNSPEC;
710 nest = nla_nest_start(skb, TCA_ACT_TAB);
714 if (tcf_action_dump(skb, actions, bind, ref) < 0)
717 nla_nest_end(skb, nest);
719 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
728 act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
729 struct list_head *actions, int event)
733 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
736 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
742 return rtnl_unicast(skb, net, portid);
745 static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
746 struct nlmsghdr *n, u32 portid)
748 struct nlattr *tb[TCA_ACT_MAX + 1];
749 const struct tc_action_ops *ops;
754 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
759 if (tb[TCA_ACT_INDEX] == NULL ||
760 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
762 index = nla_get_u32(tb[TCA_ACT_INDEX]);
765 ops = tc_lookup_action(tb[TCA_ACT_KIND]);
766 if (!ops) /* could happen in batch of actions */
769 if (ops->lookup(net, &a, index) == 0)
772 module_put(ops->owner);
776 module_put(ops->owner);
781 static int tca_action_flush(struct net *net, struct nlattr *nla,
782 struct nlmsghdr *n, u32 portid)
786 struct nlmsghdr *nlh;
788 struct netlink_callback dcb;
790 struct nlattr *tb[TCA_ACT_MAX + 1];
791 const struct tc_action_ops *ops;
795 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
797 pr_debug("tca_action_flush: failed skb alloc\n");
801 b = skb_tail_pointer(skb);
803 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
808 kind = tb[TCA_ACT_KIND];
809 ops = tc_lookup_action(kind);
810 if (!ops) /*some idjot trying to flush unknown action */
813 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
818 t->tca_family = AF_UNSPEC;
822 nest = nla_nest_start(skb, TCA_ACT_TAB);
826 err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops);
830 nla_nest_end(skb, nest);
832 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
833 nlh->nlmsg_flags |= NLM_F_ROOT;
834 module_put(ops->owner);
835 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
836 n->nlmsg_flags & NLM_F_ECHO);
843 module_put(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(net, 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);
919 if (event != RTM_GETACTION)
920 tcf_action_destroy(&actions, 0);
925 tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
931 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
935 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
936 RTM_NEWACTION, 0, 0) <= 0) {
941 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
942 n->nlmsg_flags & NLM_F_ECHO);
948 static int tcf_action_add(struct net *net, struct nlattr *nla,
949 struct nlmsghdr *n, u32 portid, int ovr)
954 for (loop = 0; loop < 10; loop++) {
955 ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions);
963 return tcf_add_notify(net, n, &actions, portid);
966 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n)
968 struct net *net = sock_net(skb->sk);
969 struct nlattr *tca[TCA_ACT_MAX + 1];
970 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
971 int ret = 0, ovr = 0;
973 if ((n->nlmsg_type != RTM_GETACTION) &&
974 !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)
997 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
1000 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1001 portid, RTM_DELACTION);
1004 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1005 portid, RTM_GETACTION);
1014 static struct nlattr *find_dump_kind(const struct nlmsghdr *n)
1016 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1017 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1018 struct nlattr *nla[TCAA_MAX + 1];
1019 struct nlattr *kind;
1021 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1023 tb1 = nla[TCA_ACT_TAB];
1027 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1028 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1033 if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL) < 0)
1035 kind = tb2[TCA_ACT_KIND];
1040 static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1042 struct net *net = sock_net(skb->sk);
1043 struct nlmsghdr *nlh;
1044 unsigned char *b = skb_tail_pointer(skb);
1045 struct nlattr *nest;
1046 struct tc_action_ops *a_o;
1048 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1049 struct nlattr *kind = find_dump_kind(cb->nlh);
1052 pr_info("tc_dump_action: action bad kind\n");
1056 a_o = tc_lookup_action(kind);
1060 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1061 cb->nlh->nlmsg_type, sizeof(*t), 0);
1063 goto out_module_put;
1064 t = nlmsg_data(nlh);
1065 t->tca_family = AF_UNSPEC;
1069 nest = nla_nest_start(skb, TCA_ACT_TAB);
1071 goto out_module_put;
1073 ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o);
1075 goto out_module_put;
1078 nla_nest_end(skb, nest);
1083 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1084 if (NETLINK_CB(cb->skb).portid && ret)
1085 nlh->nlmsg_flags |= NLM_F_MULTI;
1086 module_put(a_o->owner);
1090 module_put(a_o->owner);
1095 static int __init tc_action_init(void)
1097 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1098 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1099 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1105 subsys_initcall(tc_action_init);