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 void tcf_hash_destroy(struct tc_action
*a
)
32 struct tcf_common
*p
= a
->priv
;
33 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
35 spin_lock_bh(&hinfo
->lock
);
36 hlist_del(&p
->tcfc_head
);
37 spin_unlock_bh(&hinfo
->lock
);
38 gen_kill_estimator(&p
->tcfc_bstats
,
41 * gen_estimator est_timer() might access p->tcfc_lock
42 * or bstats, wait a RCU grace period before freeing p
44 kfree_rcu(p
, tcfc_rcu
);
46 EXPORT_SYMBOL(tcf_hash_destroy
);
48 int tcf_hash_release(struct tc_action
*a
, int bind
)
50 struct tcf_common
*p
= a
->priv
;
56 else if (p
->tcfc_bindcnt
> 0)
60 if (p
->tcfc_bindcnt
<= 0 && p
->tcfc_refcnt
<= 0) {
62 a
->ops
->cleanup(a
, bind
);
69 EXPORT_SYMBOL(tcf_hash_release
);
71 static int tcf_dump_walker(struct sk_buff
*skb
, struct netlink_callback
*cb
,
74 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
75 struct hlist_head
*head
;
77 int err
= 0, index
= -1, i
= 0, s_i
= 0, n_i
= 0;
80 spin_lock_bh(&hinfo
->lock
);
84 for (i
= 0; i
< (hinfo
->hmask
+ 1); i
++) {
85 head
= &hinfo
->htab
[tcf_hash(i
, hinfo
->hmask
)];
87 hlist_for_each_entry_rcu(p
, head
, tcfc_head
) {
94 nest
= nla_nest_start(skb
, a
->order
);
97 err
= tcf_action_dump_1(skb
, a
, 0, 0);
100 nlmsg_trim(skb
, nest
);
103 nla_nest_end(skb
, nest
);
105 if (n_i
>= TCA_ACT_MAX_PRIO
)
110 spin_unlock_bh(&hinfo
->lock
);
116 nla_nest_cancel(skb
, nest
);
120 static int tcf_del_walker(struct sk_buff
*skb
, struct tc_action
*a
)
122 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
123 struct hlist_head
*head
;
124 struct hlist_node
*n
;
125 struct tcf_common
*p
;
130 nest
= nla_nest_start(skb
, a
->order
);
132 goto nla_put_failure
;
133 if (nla_put_string(skb
, TCA_KIND
, a
->ops
->kind
))
134 goto nla_put_failure
;
135 for (i
= 0; i
< (hinfo
->hmask
+ 1); i
++) {
136 head
= &hinfo
->htab
[tcf_hash(i
, hinfo
->hmask
)];
137 hlist_for_each_entry_safe(p
, n
, head
, tcfc_head
) {
139 ret
= tcf_hash_release(a
, 0);
140 if (ret
== ACT_P_DELETED
) {
141 module_put(a
->ops
->owner
);
144 goto nla_put_failure
;
147 if (nla_put_u32(skb
, TCA_FCNT
, n_i
))
148 goto nla_put_failure
;
149 nla_nest_end(skb
, nest
);
153 nla_nest_cancel(skb
, nest
);
157 static int tcf_generic_walker(struct sk_buff
*skb
, struct netlink_callback
*cb
,
158 int type
, struct tc_action
*a
)
160 if (type
== RTM_DELACTION
) {
161 return tcf_del_walker(skb
, a
);
162 } else if (type
== RTM_GETACTION
) {
163 return tcf_dump_walker(skb
, cb
, a
);
165 WARN(1, "tcf_generic_walker: unknown action %d\n", type
);
170 static struct tcf_common
*tcf_hash_lookup(u32 index
, struct tcf_hashinfo
*hinfo
)
172 struct tcf_common
*p
= NULL
;
173 struct hlist_head
*head
;
175 spin_lock_bh(&hinfo
->lock
);
176 head
= &hinfo
->htab
[tcf_hash(index
, hinfo
->hmask
)];
177 hlist_for_each_entry_rcu(p
, head
, tcfc_head
)
178 if (p
->tcfc_index
== index
)
180 spin_unlock_bh(&hinfo
->lock
);
185 u32
tcf_hash_new_index(struct tcf_hashinfo
*hinfo
)
187 u32 val
= hinfo
->index
;
192 } while (tcf_hash_lookup(val
, hinfo
));
197 EXPORT_SYMBOL(tcf_hash_new_index
);
199 int tcf_hash_search(struct tc_action
*a
, u32 index
)
201 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
202 struct tcf_common
*p
= tcf_hash_lookup(index
, hinfo
);
210 EXPORT_SYMBOL(tcf_hash_search
);
212 int tcf_hash_check(u32 index
, struct tc_action
*a
, int bind
)
214 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
215 struct tcf_common
*p
= NULL
;
216 if (index
&& (p
= tcf_hash_lookup(index
, hinfo
)) != NULL
) {
225 EXPORT_SYMBOL(tcf_hash_check
);
227 void tcf_hash_cleanup(struct tc_action
*a
, struct nlattr
*est
)
229 struct tcf_common
*pc
= a
->priv
;
231 gen_kill_estimator(&pc
->tcfc_bstats
,
233 kfree_rcu(pc
, tcfc_rcu
);
235 EXPORT_SYMBOL(tcf_hash_cleanup
);
237 int tcf_hash_create(u32 index
, struct nlattr
*est
, struct tc_action
*a
,
240 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
241 struct tcf_common
*p
= kzalloc(size
, GFP_KERNEL
);
249 spin_lock_init(&p
->tcfc_lock
);
250 INIT_HLIST_NODE(&p
->tcfc_head
);
251 p
->tcfc_index
= index
? index
: tcf_hash_new_index(hinfo
);
252 p
->tcfc_tm
.install
= jiffies
;
253 p
->tcfc_tm
.lastuse
= jiffies
;
255 int err
= gen_new_estimator(&p
->tcfc_bstats
, NULL
,
264 a
->priv
= (void *) p
;
267 EXPORT_SYMBOL(tcf_hash_create
);
269 void tcf_hash_insert(struct tc_action
*a
)
271 struct tcf_common
*p
= a
->priv
;
272 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
273 unsigned int h
= tcf_hash(p
->tcfc_index
, hinfo
->hmask
);
275 spin_lock_bh(&hinfo
->lock
);
276 hlist_add_head(&p
->tcfc_head
, &hinfo
->htab
[h
]);
277 spin_unlock_bh(&hinfo
->lock
);
279 EXPORT_SYMBOL(tcf_hash_insert
);
281 static LIST_HEAD(act_base
);
282 static DEFINE_RWLOCK(act_mod_lock
);
284 int tcf_register_action(struct tc_action_ops
*act
, unsigned int mask
)
286 struct tc_action_ops
*a
;
289 /* Must supply act, dump and init */
290 if (!act
->act
|| !act
->dump
|| !act
->init
)
293 /* Supply defaults */
295 act
->lookup
= tcf_hash_search
;
297 act
->walk
= tcf_generic_walker
;
299 act
->hinfo
= kmalloc(sizeof(struct tcf_hashinfo
), GFP_KERNEL
);
302 err
= tcf_hashinfo_init(act
->hinfo
, mask
);
308 write_lock(&act_mod_lock
);
309 list_for_each_entry(a
, &act_base
, head
) {
310 if (act
->type
== a
->type
|| (strcmp(act
->kind
, a
->kind
) == 0)) {
311 write_unlock(&act_mod_lock
);
312 tcf_hashinfo_destroy(act
->hinfo
);
317 list_add_tail(&act
->head
, &act_base
);
318 write_unlock(&act_mod_lock
);
321 EXPORT_SYMBOL(tcf_register_action
);
323 int tcf_unregister_action(struct tc_action_ops
*act
)
325 struct tc_action_ops
*a
;
328 write_lock(&act_mod_lock
);
329 list_for_each_entry(a
, &act_base
, head
) {
331 list_del(&act
->head
);
332 tcf_hashinfo_destroy(act
->hinfo
);
338 write_unlock(&act_mod_lock
);
341 EXPORT_SYMBOL(tcf_unregister_action
);
344 static struct tc_action_ops
*tc_lookup_action_n(char *kind
)
346 struct tc_action_ops
*a
, *res
= NULL
;
349 read_lock(&act_mod_lock
);
350 list_for_each_entry(a
, &act_base
, head
) {
351 if (strcmp(kind
, a
->kind
) == 0) {
352 if (try_module_get(a
->owner
))
357 read_unlock(&act_mod_lock
);
362 /* lookup by nlattr */
363 static struct tc_action_ops
*tc_lookup_action(struct nlattr
*kind
)
365 struct tc_action_ops
*a
, *res
= NULL
;
368 read_lock(&act_mod_lock
);
369 list_for_each_entry(a
, &act_base
, head
) {
370 if (nla_strcmp(kind
, a
->kind
) == 0) {
371 if (try_module_get(a
->owner
))
376 read_unlock(&act_mod_lock
);
381 int tcf_action_exec(struct sk_buff
*skb
, const struct list_head
*actions
,
382 struct tcf_result
*res
)
384 const struct tc_action
*a
;
387 if (skb
->tc_verd
& TC_NCLS
) {
388 skb
->tc_verd
= CLR_TC_NCLS(skb
->tc_verd
);
392 list_for_each_entry(a
, actions
, list
) {
394 ret
= a
->ops
->act(skb
, a
, res
);
395 if (ret
== TC_ACT_REPEAT
)
396 goto repeat
; /* we need a ttl - JHS */
397 if (ret
!= TC_ACT_PIPE
)
403 EXPORT_SYMBOL(tcf_action_exec
);
405 int tcf_action_destroy(struct list_head
*actions
, int bind
)
407 struct tc_action
*a
, *tmp
;
410 list_for_each_entry_safe(a
, tmp
, actions
, list
) {
411 ret
= tcf_hash_release(a
, bind
);
412 if (ret
== ACT_P_DELETED
)
413 module_put(a
->ops
->owner
);
423 tcf_action_dump_old(struct sk_buff
*skb
, struct tc_action
*a
, int bind
, int ref
)
425 return a
->ops
->dump(skb
, a
, bind
, ref
);
429 tcf_action_dump_1(struct sk_buff
*skb
, struct tc_action
*a
, int bind
, int ref
)
432 unsigned char *b
= skb_tail_pointer(skb
);
435 if (nla_put_string(skb
, TCA_KIND
, a
->ops
->kind
))
436 goto nla_put_failure
;
437 if (tcf_action_copy_stats(skb
, a
, 0))
438 goto nla_put_failure
;
439 nest
= nla_nest_start(skb
, TCA_OPTIONS
);
441 goto nla_put_failure
;
442 err
= tcf_action_dump_old(skb
, a
, bind
, ref
);
444 nla_nest_end(skb
, nest
);
452 EXPORT_SYMBOL(tcf_action_dump_1
);
455 tcf_action_dump(struct sk_buff
*skb
, struct list_head
*actions
, int bind
, int ref
)
461 list_for_each_entry(a
, actions
, list
) {
462 nest
= nla_nest_start(skb
, a
->order
);
464 goto nla_put_failure
;
465 err
= tcf_action_dump_1(skb
, a
, bind
, ref
);
468 nla_nest_end(skb
, nest
);
476 nla_nest_cancel(skb
, nest
);
480 struct tc_action
*tcf_action_init_1(struct net
*net
, struct nlattr
*nla
,
481 struct nlattr
*est
, char *name
, int ovr
,
485 struct tc_action_ops
*a_o
;
486 char act_name
[IFNAMSIZ
];
487 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
492 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
496 kind
= tb
[TCA_ACT_KIND
];
499 if (nla_strlcpy(act_name
, kind
, IFNAMSIZ
) >= IFNAMSIZ
)
503 if (strlcpy(act_name
, name
, IFNAMSIZ
) >= IFNAMSIZ
)
507 a_o
= tc_lookup_action_n(act_name
);
509 #ifdef CONFIG_MODULES
511 request_module("act_%s", act_name
);
514 a_o
= tc_lookup_action_n(act_name
);
516 /* We dropped the RTNL semaphore in order to
517 * perform the module load. So, even if we
518 * succeeded in loading the module we have to
519 * tell the caller to replay the request. We
520 * indicate this using -EAGAIN.
532 a
= kzalloc(sizeof(*a
), GFP_KERNEL
);
537 INIT_LIST_HEAD(&a
->list
);
538 /* backward compatibility for policer */
540 err
= a_o
->init(net
, tb
[TCA_ACT_OPTIONS
], est
, a
, ovr
, bind
);
542 err
= a_o
->init(net
, nla
, est
, a
, ovr
, bind
);
546 /* module count goes up only when brand new policy is created
547 * if it exists and is only bound to in a_o->init() then
548 * ACT_P_CREATED is not returned (a zero is).
550 if (err
!= ACT_P_CREATED
)
551 module_put(a_o
->owner
);
558 module_put(a_o
->owner
);
563 int tcf_action_init(struct net
*net
, struct nlattr
*nla
,
564 struct nlattr
*est
, char *name
, int ovr
,
565 int bind
, struct list_head
*actions
)
567 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
568 struct tc_action
*act
;
572 err
= nla_parse_nested(tb
, TCA_ACT_MAX_PRIO
, nla
, NULL
);
576 for (i
= 1; i
<= TCA_ACT_MAX_PRIO
&& tb
[i
]; i
++) {
577 act
= tcf_action_init_1(net
, tb
[i
], est
, name
, ovr
, bind
);
583 list_add_tail(&act
->list
, actions
);
588 tcf_action_destroy(actions
, bind
);
592 int tcf_action_copy_stats(struct sk_buff
*skb
, struct tc_action
*a
,
597 struct tcf_common
*p
= a
->priv
;
602 /* compat_mode being true specifies a call that is supposed
603 * to add additional backward compatibility statistic TLVs.
606 if (a
->type
== TCA_OLD_COMPAT
)
607 err
= gnet_stats_start_copy_compat(skb
, 0,
608 TCA_STATS
, TCA_XSTATS
, &p
->tcfc_lock
, &d
);
612 err
= gnet_stats_start_copy(skb
, TCA_ACT_STATS
,
618 if (gnet_stats_copy_basic(&d
, NULL
, &p
->tcfc_bstats
) < 0 ||
619 gnet_stats_copy_rate_est(&d
, &p
->tcfc_bstats
,
620 &p
->tcfc_rate_est
) < 0 ||
621 gnet_stats_copy_queue(&d
, NULL
,
623 p
->tcfc_qstats
.qlen
) < 0)
626 if (gnet_stats_finish_copy(&d
) < 0)
636 tca_get_fill(struct sk_buff
*skb
, struct list_head
*actions
, u32 portid
, u32 seq
,
637 u16 flags
, int event
, int bind
, int ref
)
640 struct nlmsghdr
*nlh
;
641 unsigned char *b
= skb_tail_pointer(skb
);
644 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*t
), flags
);
648 t
->tca_family
= AF_UNSPEC
;
652 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
656 if (tcf_action_dump(skb
, actions
, bind
, ref
) < 0)
659 nla_nest_end(skb
, nest
);
661 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
670 act_get_notify(struct net
*net
, u32 portid
, struct nlmsghdr
*n
,
671 struct list_head
*actions
, int event
)
675 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
678 if (tca_get_fill(skb
, actions
, portid
, n
->nlmsg_seq
, 0, event
, 0, 0) <= 0) {
683 return rtnl_unicast(skb
, net
, portid
);
686 static struct tc_action
*create_a(int i
)
688 struct tc_action
*act
;
690 act
= kzalloc(sizeof(*act
), GFP_KERNEL
);
692 pr_debug("create_a: failed to alloc!\n");
696 INIT_LIST_HEAD(&act
->list
);
700 static struct tc_action
*
701 tcf_action_get_1(struct nlattr
*nla
, struct nlmsghdr
*n
, u32 portid
)
703 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
708 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
713 if (tb
[TCA_ACT_INDEX
] == NULL
||
714 nla_len(tb
[TCA_ACT_INDEX
]) < sizeof(index
))
716 index
= nla_get_u32(tb
[TCA_ACT_INDEX
]);
724 a
->ops
= tc_lookup_action(tb
[TCA_ACT_KIND
]);
725 if (a
->ops
== NULL
) /* could happen in batch of actions */
728 if (a
->ops
->lookup(a
, index
) == 0)
731 module_put(a
->ops
->owner
);
735 module_put(a
->ops
->owner
);
742 static void cleanup_a(struct list_head
*actions
)
744 struct tc_action
*a
, *tmp
;
746 list_for_each_entry_safe(a
, tmp
, actions
, list
) {
752 static int tca_action_flush(struct net
*net
, struct nlattr
*nla
,
753 struct nlmsghdr
*n
, u32 portid
)
757 struct nlmsghdr
*nlh
;
759 struct netlink_callback dcb
;
761 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
766 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
768 pr_debug("tca_action_flush: failed skb alloc\n");
772 b
= skb_tail_pointer(skb
);
774 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
779 kind
= tb
[TCA_ACT_KIND
];
780 memset(&a
, 0, sizeof(struct tc_action
));
781 INIT_LIST_HEAD(&a
.list
);
782 a
.ops
= tc_lookup_action(kind
);
783 if (a
.ops
== NULL
) /*some idjot trying to flush unknown action */
786 nlh
= nlmsg_put(skb
, portid
, n
->nlmsg_seq
, RTM_DELACTION
, sizeof(*t
), 0);
790 t
->tca_family
= AF_UNSPEC
;
794 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
798 err
= a
.ops
->walk(skb
, &dcb
, RTM_DELACTION
, &a
);
804 nla_nest_end(skb
, nest
);
806 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
807 nlh
->nlmsg_flags
|= NLM_F_ROOT
;
808 module_put(a
.ops
->owner
);
809 err
= rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
810 n
->nlmsg_flags
& NLM_F_ECHO
);
817 module_put(a
.ops
->owner
);
825 tcf_del_notify(struct net
*net
, struct nlmsghdr
*n
, struct list_head
*actions
,
831 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
835 if (tca_get_fill(skb
, actions
, portid
, n
->nlmsg_seq
, 0, RTM_DELACTION
,
841 /* now do the delete */
842 ret
= tcf_action_destroy(actions
, 0);
848 ret
= rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
849 n
->nlmsg_flags
& NLM_F_ECHO
);
856 tca_action_gd(struct net
*net
, struct nlattr
*nla
, struct nlmsghdr
*n
,
857 u32 portid
, int event
)
860 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
861 struct tc_action
*act
;
864 ret
= nla_parse_nested(tb
, TCA_ACT_MAX_PRIO
, nla
, NULL
);
868 if (event
== RTM_DELACTION
&& n
->nlmsg_flags
& NLM_F_ROOT
) {
870 return tca_action_flush(net
, tb
[1], n
, portid
);
875 for (i
= 1; i
<= TCA_ACT_MAX_PRIO
&& tb
[i
]; i
++) {
876 act
= tcf_action_get_1(tb
[i
], n
, portid
);
882 list_add_tail(&act
->list
, &actions
);
885 if (event
== RTM_GETACTION
)
886 ret
= act_get_notify(net
, portid
, n
, &actions
, event
);
888 ret
= tcf_del_notify(net
, n
, &actions
, portid
);
899 tcf_add_notify(struct net
*net
, struct nlmsghdr
*n
, struct list_head
*actions
,
905 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
909 if (tca_get_fill(skb
, actions
, portid
, n
->nlmsg_seq
, n
->nlmsg_flags
,
910 RTM_NEWACTION
, 0, 0) <= 0) {
915 err
= rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
916 n
->nlmsg_flags
& NLM_F_ECHO
);
923 tcf_action_add(struct net
*net
, struct nlattr
*nla
, struct nlmsghdr
*n
,
929 ret
= tcf_action_init(net
, nla
, NULL
, NULL
, ovr
, 0, &actions
);
933 /* dump then free all the actions after update; inserted policy
936 ret
= tcf_add_notify(net
, n
, &actions
, portid
);
942 static int tc_ctl_action(struct sk_buff
*skb
, struct nlmsghdr
*n
)
944 struct net
*net
= sock_net(skb
->sk
);
945 struct nlattr
*tca
[TCA_ACT_MAX
+ 1];
946 u32 portid
= skb
? NETLINK_CB(skb
).portid
: 0;
947 int ret
= 0, ovr
= 0;
949 if ((n
->nlmsg_type
!= RTM_GETACTION
) && !netlink_capable(skb
, CAP_NET_ADMIN
))
952 ret
= nlmsg_parse(n
, sizeof(struct tcamsg
), tca
, TCA_ACT_MAX
, NULL
);
956 if (tca
[TCA_ACT_TAB
] == NULL
) {
957 pr_notice("tc_ctl_action: received NO action attribs\n");
961 /* n->nlmsg_flags & NLM_F_CREATE */
962 switch (n
->nlmsg_type
) {
964 /* we are going to assume all other flags
965 * imply create only if it doesn't exist
966 * Note that CREATE | EXCL implies that
967 * but since we want avoid ambiguity (eg when flags
968 * is zero) then just set this
970 if (n
->nlmsg_flags
& NLM_F_REPLACE
)
973 ret
= tcf_action_add(net
, tca
[TCA_ACT_TAB
], n
, portid
, ovr
);
978 ret
= tca_action_gd(net
, tca
[TCA_ACT_TAB
], n
,
979 portid
, RTM_DELACTION
);
982 ret
= tca_action_gd(net
, tca
[TCA_ACT_TAB
], n
,
983 portid
, RTM_GETACTION
);
992 static struct nlattr
*
993 find_dump_kind(const struct nlmsghdr
*n
)
995 struct nlattr
*tb1
, *tb2
[TCA_ACT_MAX
+ 1];
996 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
997 struct nlattr
*nla
[TCAA_MAX
+ 1];
1000 if (nlmsg_parse(n
, sizeof(struct tcamsg
), nla
, TCAA_MAX
, NULL
) < 0)
1002 tb1
= nla
[TCA_ACT_TAB
];
1006 if (nla_parse(tb
, TCA_ACT_MAX_PRIO
, nla_data(tb1
),
1007 NLMSG_ALIGN(nla_len(tb1
)), NULL
) < 0)
1012 if (nla_parse(tb2
, TCA_ACT_MAX
, nla_data(tb
[1]),
1013 nla_len(tb
[1]), NULL
) < 0)
1015 kind
= tb2
[TCA_ACT_KIND
];
1021 tc_dump_action(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1023 struct nlmsghdr
*nlh
;
1024 unsigned char *b
= skb_tail_pointer(skb
);
1025 struct nlattr
*nest
;
1026 struct tc_action_ops
*a_o
;
1029 struct tcamsg
*t
= (struct tcamsg
*) nlmsg_data(cb
->nlh
);
1030 struct nlattr
*kind
= find_dump_kind(cb
->nlh
);
1033 pr_info("tc_dump_action: action bad kind\n");
1037 a_o
= tc_lookup_action(kind
);
1041 memset(&a
, 0, sizeof(struct tc_action
));
1044 nlh
= nlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
1045 cb
->nlh
->nlmsg_type
, sizeof(*t
), 0);
1047 goto out_module_put
;
1048 t
= nlmsg_data(nlh
);
1049 t
->tca_family
= AF_UNSPEC
;
1053 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
1055 goto out_module_put
;
1057 ret
= a_o
->walk(skb
, cb
, RTM_GETACTION
, &a
);
1059 goto out_module_put
;
1062 nla_nest_end(skb
, nest
);
1065 nla_nest_cancel(skb
, nest
);
1067 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
1068 if (NETLINK_CB(cb
->skb
).portid
&& ret
)
1069 nlh
->nlmsg_flags
|= NLM_F_MULTI
;
1070 module_put(a_o
->owner
);
1074 module_put(a_o
->owner
);
1079 static int __init
tc_action_init(void)
1081 rtnl_register(PF_UNSPEC
, RTM_NEWACTION
, tc_ctl_action
, NULL
, NULL
);
1082 rtnl_register(PF_UNSPEC
, RTM_DELACTION
, tc_ctl_action
, NULL
, NULL
);
1083 rtnl_register(PF_UNSPEC
, RTM_GETACTION
, tc_ctl_action
, tc_dump_action
,
1089 subsys_initcall(tc_action_init
);
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