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 err = tcf_action_dump_1(skb, p, 0, 0);
103 nlmsg_trim(skb, nest);
106 nla_nest_end(skb, nest);
108 if (n_i >= TCA_ACT_MAX_PRIO)
113 spin_unlock_bh(&hinfo->lock);
119 nla_nest_cancel(skb, nest);
123 static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
124 const struct tc_action_ops *ops)
130 nest = nla_nest_start(skb, 0);
132 goto nla_put_failure;
133 if (nla_put_string(skb, TCA_KIND, ops->kind))
134 goto nla_put_failure;
135 for (i = 0; i < (hinfo->hmask + 1); i++) {
136 struct hlist_head *head;
137 struct hlist_node *n;
140 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
141 hlist_for_each_entry_safe(p, n, head, tcfa_head) {
142 ret = __tcf_hash_release(p, false, true);
143 if (ret == ACT_P_DELETED) {
144 module_put(p->ops->owner);
147 goto nla_put_failure;
150 if (nla_put_u32(skb, TCA_FCNT, n_i))
151 goto nla_put_failure;
152 nla_nest_end(skb, nest);
156 nla_nest_cancel(skb, nest);
160 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
161 struct netlink_callback *cb, int type,
162 const struct tc_action_ops *ops)
164 struct tcf_hashinfo *hinfo = tn->hinfo;
166 if (type == RTM_DELACTION) {
167 return tcf_del_walker(hinfo, skb, ops);
168 } else if (type == RTM_GETACTION) {
169 return tcf_dump_walker(hinfo, skb, cb);
171 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
175 EXPORT_SYMBOL(tcf_generic_walker);
177 static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
179 struct tc_action *p = NULL;
180 struct hlist_head *head;
182 spin_lock_bh(&hinfo->lock);
183 head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
184 hlist_for_each_entry_rcu(p, head, tcfa_head)
185 if (p->tcfa_index == index)
187 spin_unlock_bh(&hinfo->lock);
192 u32 tcf_hash_new_index(struct tc_action_net *tn)
194 struct tcf_hashinfo *hinfo = tn->hinfo;
195 u32 val = hinfo->index;
200 } while (tcf_hash_lookup(val, hinfo));
205 EXPORT_SYMBOL(tcf_hash_new_index);
207 int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
209 struct tcf_hashinfo *hinfo = tn->hinfo;
210 struct tc_action *p = tcf_hash_lookup(index, hinfo);
218 EXPORT_SYMBOL(tcf_hash_search);
220 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
223 struct tcf_hashinfo *hinfo = tn->hinfo;
224 struct tc_action *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)
240 gen_kill_estimator(&a->tcfa_bstats,
242 call_rcu(&a->tcfa_rcu, free_tcf);
244 EXPORT_SYMBOL(tcf_hash_cleanup);
246 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
247 struct tc_action **a, const struct tc_action_ops *ops,
248 int bind, bool cpustats)
250 struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
251 struct tcf_hashinfo *hinfo = tn->hinfo;
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->tcfa_lock);
275 INIT_HLIST_NODE(&p->tcfa_head);
276 p->tcfa_index = index ? index : tcf_hash_new_index(tn);
277 p->tcfa_tm.install = jiffies;
278 p->tcfa_tm.lastuse = jiffies;
279 p->tcfa_tm.firstuse = 0;
281 err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
283 &p->tcfa_lock, NULL, est);
285 free_percpu(p->cpu_qstats);
292 INIT_LIST_HEAD(&p->list);
296 EXPORT_SYMBOL(tcf_hash_create);
298 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
300 struct tcf_hashinfo *hinfo = tn->hinfo;
301 unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
303 spin_lock_bh(&hinfo->lock);
304 hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
305 spin_unlock_bh(&hinfo->lock);
307 EXPORT_SYMBOL(tcf_hash_insert);
309 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
310 struct tcf_hashinfo *hinfo)
314 for (i = 0; i < hinfo->hmask + 1; i++) {
316 struct hlist_node *n;
318 hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
321 ret = __tcf_hash_release(p, false, true);
322 if (ret == ACT_P_DELETED)
323 module_put(ops->owner);
330 EXPORT_SYMBOL(tcf_hashinfo_destroy);
332 static LIST_HEAD(act_base);
333 static DEFINE_RWLOCK(act_mod_lock);
335 int tcf_register_action(struct tc_action_ops *act,
336 struct pernet_operations *ops)
338 struct tc_action_ops *a;
341 if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
344 /* We have to register pernet ops before making the action ops visible,
345 * otherwise tcf_action_init_1() could get a partially initialized
348 ret = register_pernet_subsys(ops);
352 write_lock(&act_mod_lock);
353 list_for_each_entry(a, &act_base, head) {
354 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
355 write_unlock(&act_mod_lock);
356 unregister_pernet_subsys(ops);
360 list_add_tail(&act->head, &act_base);
361 write_unlock(&act_mod_lock);
365 EXPORT_SYMBOL(tcf_register_action);
367 int tcf_unregister_action(struct tc_action_ops *act,
368 struct pernet_operations *ops)
370 struct tc_action_ops *a;
373 write_lock(&act_mod_lock);
374 list_for_each_entry(a, &act_base, head) {
376 list_del(&act->head);
381 write_unlock(&act_mod_lock);
383 unregister_pernet_subsys(ops);
386 EXPORT_SYMBOL(tcf_unregister_action);
389 static struct tc_action_ops *tc_lookup_action_n(char *kind)
391 struct tc_action_ops *a, *res = NULL;
394 read_lock(&act_mod_lock);
395 list_for_each_entry(a, &act_base, head) {
396 if (strcmp(kind, a->kind) == 0) {
397 if (try_module_get(a->owner))
402 read_unlock(&act_mod_lock);
407 /* lookup by nlattr */
408 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
410 struct tc_action_ops *a, *res = NULL;
413 read_lock(&act_mod_lock);
414 list_for_each_entry(a, &act_base, head) {
415 if (nla_strcmp(kind, a->kind) == 0) {
416 if (try_module_get(a->owner))
421 read_unlock(&act_mod_lock);
426 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
427 int nr_actions, struct tcf_result *res)
431 if (skb->tc_verd & TC_NCLS) {
432 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
436 for (i = 0; i < nr_actions; i++) {
437 const struct tc_action *a = actions[i];
440 ret = a->ops->act(skb, a, res);
441 if (ret == TC_ACT_REPEAT)
442 goto repeat; /* we need a ttl - JHS */
443 if (ret != TC_ACT_PIPE)
449 EXPORT_SYMBOL(tcf_action_exec);
451 int tcf_action_destroy(struct list_head *actions, int bind)
453 struct tc_action *a, *tmp;
456 list_for_each_entry_safe(a, tmp, actions, list) {
457 ret = __tcf_hash_release(a, bind, true);
458 if (ret == ACT_P_DELETED)
459 module_put(a->ops->owner);
467 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
469 return a->ops->dump(skb, a, bind, ref);
473 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
476 unsigned char *b = skb_tail_pointer(skb);
479 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
480 goto nla_put_failure;
481 if (tcf_action_copy_stats(skb, a, 0))
482 goto nla_put_failure;
483 nest = nla_nest_start(skb, TCA_OPTIONS);
485 goto nla_put_failure;
486 err = tcf_action_dump_old(skb, a, bind, ref);
488 nla_nest_end(skb, nest);
496 EXPORT_SYMBOL(tcf_action_dump_1);
498 int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
505 list_for_each_entry(a, actions, list) {
506 nest = nla_nest_start(skb, a->order);
508 goto nla_put_failure;
509 err = tcf_action_dump_1(skb, a, bind, ref);
512 nla_nest_end(skb, nest);
520 nla_nest_cancel(skb, nest);
524 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
525 struct nlattr *est, char *name, int ovr,
529 struct tc_action_ops *a_o;
530 char act_name[IFNAMSIZ];
531 struct nlattr *tb[TCA_ACT_MAX + 1];
536 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
540 kind = tb[TCA_ACT_KIND];
543 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
547 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
551 a_o = tc_lookup_action_n(act_name);
553 #ifdef CONFIG_MODULES
555 request_module("act_%s", act_name);
558 a_o = tc_lookup_action_n(act_name);
560 /* We dropped the RTNL semaphore in order to
561 * perform the module load. So, even if we
562 * succeeded in loading the module we have to
563 * tell the caller to replay the request. We
564 * indicate this using -EAGAIN.
575 /* backward compatibility for policer */
577 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
579 err = a_o->init(net, nla, est, &a, ovr, bind);
583 /* module count goes up only when brand new policy is created
584 * if it exists and is only bound to in a_o->init() then
585 * ACT_P_CREATED is not returned (a zero is).
587 if (err != ACT_P_CREATED)
588 module_put(a_o->owner);
593 module_put(a_o->owner);
598 static void cleanup_a(struct list_head *actions, int ovr)
605 list_for_each_entry(a, actions, list)
609 int tcf_action_init(struct net *net, struct nlattr *nla, struct nlattr *est,
610 char *name, int ovr, int bind, struct list_head *actions)
612 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
613 struct tc_action *act;
617 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
621 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
622 act = tcf_action_init_1(net, tb[i], est, name, ovr, bind);
630 list_add_tail(&act->list, actions);
633 /* Remove the temp refcnt which was necessary to protect against
634 * destroying an existing action which was being replaced
636 cleanup_a(actions, ovr);
640 tcf_action_destroy(actions, bind);
644 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
653 /* compat_mode being true specifies a call that is supposed
654 * to add additional backward compatibility statistic TLVs.
657 if (p->type == TCA_OLD_COMPAT)
658 err = gnet_stats_start_copy_compat(skb, 0,
666 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
667 &p->tcfa_lock, &d, TCA_ACT_PAD);
672 if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 ||
673 gnet_stats_copy_rate_est(&d, &p->tcfa_bstats,
674 &p->tcfa_rate_est) < 0 ||
675 gnet_stats_copy_queue(&d, p->cpu_qstats,
677 p->tcfa_qstats.qlen) < 0)
680 if (gnet_stats_finish_copy(&d) < 0)
689 static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
690 u32 portid, u32 seq, u16 flags, int event, int bind,
694 struct nlmsghdr *nlh;
695 unsigned char *b = skb_tail_pointer(skb);
698 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
702 t->tca_family = AF_UNSPEC;
706 nest = nla_nest_start(skb, TCA_ACT_TAB);
710 if (tcf_action_dump(skb, actions, bind, ref) < 0)
713 nla_nest_end(skb, nest);
715 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
724 act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
725 struct list_head *actions, int event)
729 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
732 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
738 return rtnl_unicast(skb, net, portid);
741 static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
742 struct nlmsghdr *n, u32 portid)
744 struct nlattr *tb[TCA_ACT_MAX + 1];
745 const struct tc_action_ops *ops;
750 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
755 if (tb[TCA_ACT_INDEX] == NULL ||
756 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
758 index = nla_get_u32(tb[TCA_ACT_INDEX]);
761 ops = tc_lookup_action(tb[TCA_ACT_KIND]);
762 if (!ops) /* could happen in batch of actions */
765 if (ops->lookup(net, &a, index) == 0)
768 module_put(ops->owner);
772 module_put(ops->owner);
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];
787 const struct tc_action_ops *ops;
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 ops = tc_lookup_action(kind);
806 if (!ops) /*some idjot trying to flush unknown action */
809 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
814 t->tca_family = AF_UNSPEC;
818 nest = nla_nest_start(skb, TCA_ACT_TAB);
822 err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops);
828 nla_nest_end(skb, nest);
830 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
831 nlh->nlmsg_flags |= NLM_F_ROOT;
832 module_put(ops->owner);
833 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
834 n->nlmsg_flags & NLM_F_ECHO);
841 module_put(ops->owner);
849 tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
855 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
859 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
865 /* now do the delete */
866 ret = tcf_action_destroy(actions, 0);
872 ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
873 n->nlmsg_flags & NLM_F_ECHO);
880 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
881 u32 portid, int event)
884 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
885 struct tc_action *act;
888 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
892 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
894 return tca_action_flush(net, tb[1], n, portid);
899 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
900 act = tcf_action_get_1(net, tb[i], n, portid);
906 if (event == RTM_GETACTION)
908 list_add_tail(&act->list, &actions);
911 if (event == RTM_GETACTION)
912 ret = act_get_notify(net, portid, n, &actions, event);
914 ret = tcf_del_notify(net, n, &actions, portid);
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 ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions);
958 return tcf_add_notify(net, n, &actions, portid);
961 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n)
963 struct net *net = sock_net(skb->sk);
964 struct nlattr *tca[TCA_ACT_MAX + 1];
965 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
966 int ret = 0, ovr = 0;
968 if ((n->nlmsg_type != RTM_GETACTION) &&
969 !netlink_capable(skb, CAP_NET_ADMIN))
972 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
976 if (tca[TCA_ACT_TAB] == NULL) {
977 pr_notice("tc_ctl_action: received NO action attribs\n");
981 /* n->nlmsg_flags & NLM_F_CREATE */
982 switch (n->nlmsg_type) {
984 /* we are going to assume all other flags
985 * imply create only if it doesn't exist
986 * Note that CREATE | EXCL implies that
987 * but since we want avoid ambiguity (eg when flags
988 * is zero) then just set this
990 if (n->nlmsg_flags & NLM_F_REPLACE)
993 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
998 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
999 portid, RTM_DELACTION);
1002 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1003 portid, RTM_GETACTION);
1012 static struct nlattr *find_dump_kind(const struct nlmsghdr *n)
1014 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1015 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1016 struct nlattr *nla[TCAA_MAX + 1];
1017 struct nlattr *kind;
1019 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1021 tb1 = nla[TCA_ACT_TAB];
1025 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1026 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1031 if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL) < 0)
1033 kind = tb2[TCA_ACT_KIND];
1038 static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1040 struct net *net = sock_net(skb->sk);
1041 struct nlmsghdr *nlh;
1042 unsigned char *b = skb_tail_pointer(skb);
1043 struct nlattr *nest;
1044 struct tc_action_ops *a_o;
1046 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1047 struct nlattr *kind = find_dump_kind(cb->nlh);
1050 pr_info("tc_dump_action: action bad kind\n");
1054 a_o = tc_lookup_action(kind);
1058 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1059 cb->nlh->nlmsg_type, sizeof(*t), 0);
1061 goto out_module_put;
1062 t = nlmsg_data(nlh);
1063 t->tca_family = AF_UNSPEC;
1067 nest = nla_nest_start(skb, TCA_ACT_TAB);
1069 goto out_module_put;
1071 ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o);
1073 goto out_module_put;
1076 nla_nest_end(skb, nest);
1081 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1082 if (NETLINK_CB(cb->skb).portid && ret)
1083 nlh->nlmsg_flags |= NLM_F_MULTI;
1084 module_put(a_o->owner);
1088 module_put(a_o->owner);
1093 static int __init tc_action_init(void)
1095 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1096 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1097 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1103 subsys_initcall(tc_action_init);