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 static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *a)
41 struct tcf_common *p = a->priv;
43 spin_lock_bh(&hinfo->lock);
44 hlist_del(&p->tcfc_head);
45 spin_unlock_bh(&hinfo->lock);
46 gen_kill_estimator(&p->tcfc_bstats,
49 * gen_estimator est_timer() might access p->tcfc_lock
50 * or bstats, wait a RCU grace period before freeing p
52 call_rcu(&p->tcfc_rcu, free_tcf);
55 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict)
57 struct tcf_common *p = a->priv;
63 else if (strict && p->tcfc_bindcnt > 0)
67 if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
69 a->ops->cleanup(a, bind);
70 tcf_hash_destroy(a->hinfo, a);
77 EXPORT_SYMBOL(__tcf_hash_release);
79 static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
80 struct netlink_callback *cb, struct tc_action *a)
82 struct hlist_head *head;
84 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
87 spin_lock_bh(&hinfo->lock);
91 for (i = 0; i < (hinfo->hmask + 1); i++) {
92 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
94 hlist_for_each_entry_rcu(p, head, tcfc_head) {
101 nest = nla_nest_start(skb, a->order);
103 goto nla_put_failure;
104 err = tcf_action_dump_1(skb, a, 0, 0);
107 nlmsg_trim(skb, nest);
110 nla_nest_end(skb, nest);
112 if (n_i >= TCA_ACT_MAX_PRIO)
117 spin_unlock_bh(&hinfo->lock);
123 nla_nest_cancel(skb, nest);
127 static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
130 struct hlist_head *head;
131 struct hlist_node *n;
132 struct tcf_common *p;
137 nest = nla_nest_start(skb, a->order);
139 goto nla_put_failure;
140 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
141 goto nla_put_failure;
142 for (i = 0; i < (hinfo->hmask + 1); i++) {
143 head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
144 hlist_for_each_entry_safe(p, n, head, tcfc_head) {
146 ret = __tcf_hash_release(a, false, true);
147 if (ret == ACT_P_DELETED) {
148 module_put(a->ops->owner);
151 goto nla_put_failure;
154 if (nla_put_u32(skb, TCA_FCNT, n_i))
155 goto nla_put_failure;
156 nla_nest_end(skb, nest);
160 nla_nest_cancel(skb, nest);
164 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
165 struct netlink_callback *cb, int type,
168 struct tcf_hashinfo *hinfo = tn->hinfo;
172 if (type == RTM_DELACTION) {
173 return tcf_del_walker(hinfo, skb, a);
174 } else if (type == RTM_GETACTION) {
175 return tcf_dump_walker(hinfo, skb, cb, a);
177 WARN(1, "tcf_generic_walker: unknown action %d\n", type);
181 EXPORT_SYMBOL(tcf_generic_walker);
183 static struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
185 struct tcf_common *p = NULL;
186 struct hlist_head *head;
188 spin_lock_bh(&hinfo->lock);
189 head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
190 hlist_for_each_entry_rcu(p, head, tcfc_head)
191 if (p->tcfc_index == index)
193 spin_unlock_bh(&hinfo->lock);
198 u32 tcf_hash_new_index(struct tc_action_net *tn)
200 struct tcf_hashinfo *hinfo = tn->hinfo;
201 u32 val = hinfo->index;
206 } while (tcf_hash_lookup(val, hinfo));
211 EXPORT_SYMBOL(tcf_hash_new_index);
213 int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index)
215 struct tcf_hashinfo *hinfo = tn->hinfo;
216 struct tcf_common *p = tcf_hash_lookup(index, hinfo);
225 EXPORT_SYMBOL(tcf_hash_search);
227 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a,
230 struct tcf_hashinfo *hinfo = tn->hinfo;
231 struct tcf_common *p = NULL;
232 if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
242 EXPORT_SYMBOL(tcf_hash_check);
244 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
246 struct tcf_common *pc = a->priv;
248 gen_kill_estimator(&pc->tcfc_bstats,
250 call_rcu(&pc->tcfc_rcu, free_tcf);
252 EXPORT_SYMBOL(tcf_hash_cleanup);
254 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
255 struct tc_action *a, int size, int bind, bool cpustats)
257 struct tcf_common *p = kzalloc(size, GFP_KERNEL);
258 struct tcf_hashinfo *hinfo = tn->hinfo;
268 p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
269 if (!p->cpu_bstats) {
274 p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
275 if (!p->cpu_qstats) {
277 free_percpu(p->cpu_bstats);
281 spin_lock_init(&p->tcfc_lock);
282 INIT_HLIST_NODE(&p->tcfc_head);
283 p->tcfc_index = index ? index : tcf_hash_new_index(tn);
284 p->tcfc_tm.install = jiffies;
285 p->tcfc_tm.lastuse = jiffies;
286 p->tcfc_tm.firstuse = 0;
288 err = gen_new_estimator(&p->tcfc_bstats, p->cpu_bstats,
290 &p->tcfc_lock, NULL, est);
292 free_percpu(p->cpu_qstats);
297 a->priv = (void *) p;
301 EXPORT_SYMBOL(tcf_hash_create);
303 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
305 struct tcf_common *p = a->priv;
306 struct tcf_hashinfo *hinfo = tn->hinfo;
307 unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
309 spin_lock_bh(&hinfo->lock);
310 hlist_add_head(&p->tcfc_head, &hinfo->htab[h]);
311 spin_unlock_bh(&hinfo->lock);
313 EXPORT_SYMBOL(tcf_hash_insert);
315 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
316 struct tcf_hashinfo *hinfo)
318 struct tc_action a = {
324 for (i = 0; i < hinfo->hmask + 1; i++) {
325 struct tcf_common *p;
326 struct hlist_node *n;
328 hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfc_head) {
332 ret = __tcf_hash_release(&a, false, true);
333 if (ret == ACT_P_DELETED)
334 module_put(ops->owner);
341 EXPORT_SYMBOL(tcf_hashinfo_destroy);
343 static LIST_HEAD(act_base);
344 static DEFINE_RWLOCK(act_mod_lock);
346 int tcf_register_action(struct tc_action_ops *act,
347 struct pernet_operations *ops)
349 struct tc_action_ops *a;
352 if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
355 write_lock(&act_mod_lock);
356 list_for_each_entry(a, &act_base, head) {
357 if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
358 write_unlock(&act_mod_lock);
362 list_add_tail(&act->head, &act_base);
363 write_unlock(&act_mod_lock);
365 ret = register_pernet_subsys(ops);
367 tcf_unregister_action(act, ops);
373 EXPORT_SYMBOL(tcf_register_action);
375 int tcf_unregister_action(struct tc_action_ops *act,
376 struct pernet_operations *ops)
378 struct tc_action_ops *a;
381 unregister_pernet_subsys(ops);
383 write_lock(&act_mod_lock);
384 list_for_each_entry(a, &act_base, head) {
386 list_del(&act->head);
391 write_unlock(&act_mod_lock);
394 EXPORT_SYMBOL(tcf_unregister_action);
397 static struct tc_action_ops *tc_lookup_action_n(char *kind)
399 struct tc_action_ops *a, *res = NULL;
402 read_lock(&act_mod_lock);
403 list_for_each_entry(a, &act_base, head) {
404 if (strcmp(kind, a->kind) == 0) {
405 if (try_module_get(a->owner))
410 read_unlock(&act_mod_lock);
415 /* lookup by nlattr */
416 static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
418 struct tc_action_ops *a, *res = NULL;
421 read_lock(&act_mod_lock);
422 list_for_each_entry(a, &act_base, head) {
423 if (nla_strcmp(kind, a->kind) == 0) {
424 if (try_module_get(a->owner))
429 read_unlock(&act_mod_lock);
434 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
435 struct tcf_result *res)
437 const struct tc_action *a;
440 if (skb->tc_verd & TC_NCLS) {
441 skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
445 list_for_each_entry(a, actions, list) {
447 ret = a->ops->act(skb, a, res);
448 if (ret == TC_ACT_REPEAT)
449 goto repeat; /* we need a ttl - JHS */
450 if (ret != TC_ACT_PIPE)
456 EXPORT_SYMBOL(tcf_action_exec);
458 int tcf_action_destroy(struct list_head *actions, int bind)
460 struct tc_action *a, *tmp;
463 list_for_each_entry_safe(a, tmp, actions, list) {
464 ret = __tcf_hash_release(a, bind, true);
465 if (ret == ACT_P_DELETED)
466 module_put(a->ops->owner);
476 tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
478 return a->ops->dump(skb, a, bind, ref);
482 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
485 unsigned char *b = skb_tail_pointer(skb);
488 if (nla_put_string(skb, TCA_KIND, a->ops->kind))
489 goto nla_put_failure;
490 if (tcf_action_copy_stats(skb, a, 0))
491 goto nla_put_failure;
492 nest = nla_nest_start(skb, TCA_OPTIONS);
494 goto nla_put_failure;
495 err = tcf_action_dump_old(skb, a, bind, ref);
497 nla_nest_end(skb, nest);
505 EXPORT_SYMBOL(tcf_action_dump_1);
507 int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
514 list_for_each_entry(a, actions, list) {
515 nest = nla_nest_start(skb, a->order);
517 goto nla_put_failure;
518 err = tcf_action_dump_1(skb, a, bind, ref);
521 nla_nest_end(skb, nest);
529 nla_nest_cancel(skb, nest);
533 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
534 struct nlattr *est, char *name, int ovr,
538 struct tc_action_ops *a_o;
539 char act_name[IFNAMSIZ];
540 struct nlattr *tb[TCA_ACT_MAX + 1];
545 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
549 kind = tb[TCA_ACT_KIND];
552 if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
556 if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
560 a_o = tc_lookup_action_n(act_name);
562 #ifdef CONFIG_MODULES
564 request_module("act_%s", act_name);
567 a_o = tc_lookup_action_n(act_name);
569 /* We dropped the RTNL semaphore in order to
570 * perform the module load. So, even if we
571 * succeeded in loading the module we have to
572 * tell the caller to replay the request. We
573 * indicate this using -EAGAIN.
585 a = kzalloc(sizeof(*a), GFP_KERNEL);
590 INIT_LIST_HEAD(&a->list);
591 /* backward compatibility for policer */
593 err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
595 err = a_o->init(net, nla, est, a, ovr, bind);
599 /* module count goes up only when brand new policy is created
600 * if it exists and is only bound to in a_o->init() then
601 * ACT_P_CREATED is not returned (a zero is).
603 if (err != ACT_P_CREATED)
604 module_put(a_o->owner);
611 module_put(a_o->owner);
616 int tcf_action_init(struct net *net, struct nlattr *nla,
617 struct nlattr *est, char *name, int ovr,
618 int bind, struct list_head *actions)
620 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
621 struct tc_action *act;
625 err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
629 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
630 act = tcf_action_init_1(net, tb[i], est, name, ovr, bind);
636 list_add_tail(&act->list, actions);
641 tcf_action_destroy(actions, bind);
645 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
650 struct tcf_common *p = a->priv;
655 /* compat_mode being true specifies a call that is supposed
656 * to add additional backward compatibility statistic TLVs.
659 if (a->type == TCA_OLD_COMPAT)
660 err = gnet_stats_start_copy_compat(skb, 0,
668 err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
669 &p->tcfc_lock, &d, TCA_ACT_PAD);
674 if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfc_bstats) < 0 ||
675 gnet_stats_copy_rate_est(&d, &p->tcfc_bstats,
676 &p->tcfc_rate_est) < 0 ||
677 gnet_stats_copy_queue(&d, p->cpu_qstats,
679 p->tcfc_qstats.qlen) < 0)
682 if (gnet_stats_finish_copy(&d) < 0)
691 static int tca_get_fill(struct sk_buff *skb, struct list_head *actions,
692 u32 portid, u32 seq, u16 flags, int event, int bind,
696 struct nlmsghdr *nlh;
697 unsigned char *b = skb_tail_pointer(skb);
700 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags);
704 t->tca_family = AF_UNSPEC;
708 nest = nla_nest_start(skb, TCA_ACT_TAB);
712 if (tcf_action_dump(skb, actions, bind, ref) < 0)
715 nla_nest_end(skb, nest);
717 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
726 act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n,
727 struct list_head *actions, int event)
731 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
734 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event,
740 return rtnl_unicast(skb, net, portid);
743 static struct tc_action *create_a(int i)
745 struct tc_action *act;
747 act = kzalloc(sizeof(*act), GFP_KERNEL);
749 pr_debug("create_a: failed to alloc!\n");
753 INIT_LIST_HEAD(&act->list);
757 static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla,
758 struct nlmsghdr *n, u32 portid)
760 struct nlattr *tb[TCA_ACT_MAX + 1];
765 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
770 if (tb[TCA_ACT_INDEX] == NULL ||
771 nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
773 index = nla_get_u32(tb[TCA_ACT_INDEX]);
781 a->ops = tc_lookup_action(tb[TCA_ACT_KIND]);
782 if (a->ops == NULL) /* could happen in batch of actions */
785 if (a->ops->lookup(net, a, index) == 0)
788 module_put(a->ops->owner);
792 module_put(a->ops->owner);
799 static void cleanup_a(struct list_head *actions)
801 struct tc_action *a, *tmp;
803 list_for_each_entry_safe(a, tmp, actions, list) {
809 static int tca_action_flush(struct net *net, struct nlattr *nla,
810 struct nlmsghdr *n, u32 portid)
814 struct nlmsghdr *nlh;
816 struct netlink_callback dcb;
818 struct nlattr *tb[TCA_ACT_MAX + 1];
823 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
825 pr_debug("tca_action_flush: failed skb alloc\n");
829 b = skb_tail_pointer(skb);
831 err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
836 kind = tb[TCA_ACT_KIND];
837 memset(&a, 0, sizeof(struct tc_action));
838 INIT_LIST_HEAD(&a.list);
839 a.ops = tc_lookup_action(kind);
840 if (a.ops == NULL) /*some idjot trying to flush unknown action */
843 nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION,
848 t->tca_family = AF_UNSPEC;
852 nest = nla_nest_start(skb, TCA_ACT_TAB);
856 err = a.ops->walk(net, skb, &dcb, RTM_DELACTION, &a);
862 nla_nest_end(skb, nest);
864 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
865 nlh->nlmsg_flags |= NLM_F_ROOT;
866 module_put(a.ops->owner);
867 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
868 n->nlmsg_flags & NLM_F_ECHO);
875 module_put(a.ops->owner);
883 tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
889 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
893 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION,
899 /* now do the delete */
900 ret = tcf_action_destroy(actions, 0);
906 ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
907 n->nlmsg_flags & NLM_F_ECHO);
914 tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
915 u32 portid, int event)
918 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
919 struct tc_action *act;
922 ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
926 if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) {
928 return tca_action_flush(net, tb[1], n, portid);
933 for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
934 act = tcf_action_get_1(net, tb[i], n, portid);
940 list_add_tail(&act->list, &actions);
943 if (event == RTM_GETACTION)
944 ret = act_get_notify(net, portid, n, &actions, event);
946 ret = tcf_del_notify(net, n, &actions, portid);
957 tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions,
963 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
967 if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags,
968 RTM_NEWACTION, 0, 0) <= 0) {
973 err = rtnetlink_send(skb, net, portid, RTNLGRP_TC,
974 n->nlmsg_flags & NLM_F_ECHO);
981 tcf_action_add(struct net *net, struct nlattr *nla, struct nlmsghdr *n,
987 ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions);
991 /* dump then free all the actions after update; inserted policy
994 ret = tcf_add_notify(net, n, &actions, portid);
1000 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n)
1002 struct net *net = sock_net(skb->sk);
1003 struct nlattr *tca[TCA_ACT_MAX + 1];
1004 u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1005 int ret = 0, ovr = 0;
1007 if ((n->nlmsg_type != RTM_GETACTION) &&
1008 !netlink_capable(skb, CAP_NET_ADMIN))
1011 ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
1015 if (tca[TCA_ACT_TAB] == NULL) {
1016 pr_notice("tc_ctl_action: received NO action attribs\n");
1020 /* n->nlmsg_flags & NLM_F_CREATE */
1021 switch (n->nlmsg_type) {
1023 /* we are going to assume all other flags
1024 * imply create only if it doesn't exist
1025 * Note that CREATE | EXCL implies that
1026 * but since we want avoid ambiguity (eg when flags
1027 * is zero) then just set this
1029 if (n->nlmsg_flags & NLM_F_REPLACE)
1032 ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr);
1037 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1038 portid, RTM_DELACTION);
1041 ret = tca_action_gd(net, tca[TCA_ACT_TAB], n,
1042 portid, RTM_GETACTION);
1051 static struct nlattr *
1052 find_dump_kind(const struct nlmsghdr *n)
1054 struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1];
1055 struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
1056 struct nlattr *nla[TCAA_MAX + 1];
1057 struct nlattr *kind;
1059 if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
1061 tb1 = nla[TCA_ACT_TAB];
1065 if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
1066 NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
1071 if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]),
1072 nla_len(tb[1]), NULL) < 0)
1074 kind = tb2[TCA_ACT_KIND];
1080 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
1082 struct net *net = sock_net(skb->sk);
1083 struct nlmsghdr *nlh;
1084 unsigned char *b = skb_tail_pointer(skb);
1085 struct nlattr *nest;
1086 struct tc_action_ops *a_o;
1089 struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh);
1090 struct nlattr *kind = find_dump_kind(cb->nlh);
1093 pr_info("tc_dump_action: action bad kind\n");
1097 a_o = tc_lookup_action(kind);
1101 memset(&a, 0, sizeof(struct tc_action));
1104 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1105 cb->nlh->nlmsg_type, sizeof(*t), 0);
1107 goto out_module_put;
1108 t = nlmsg_data(nlh);
1109 t->tca_family = AF_UNSPEC;
1113 nest = nla_nest_start(skb, TCA_ACT_TAB);
1115 goto out_module_put;
1117 ret = a_o->walk(net, skb, cb, RTM_GETACTION, &a);
1119 goto out_module_put;
1122 nla_nest_end(skb, nest);
1127 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1128 if (NETLINK_CB(cb->skb).portid && ret)
1129 nlh->nlmsg_flags |= NLM_F_MULTI;
1130 module_put(a_o->owner);
1134 module_put(a_o->owner);
1139 static int __init tc_action_init(void)
1141 rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL);
1142 rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL);
1143 rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action,
1149 subsys_initcall(tc_action_init);