2 * net/sched/cls_api.c Packet classifier 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 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
13 * Eduardo J. Blanco <ejbs@netlabs.com.uy> :990222: kmod support
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/kernel.h>
20 #include <linux/string.h>
21 #include <linux/errno.h>
22 #include <linux/err.h>
23 #include <linux/skbuff.h>
24 #include <linux/init.h>
25 #include <linux/kmod.h>
26 #include <linux/err.h>
27 #include <linux/slab.h>
28 #include <net/net_namespace.h>
30 #include <net/netlink.h>
31 #include <net/pkt_sched.h>
32 #include <net/pkt_cls.h>
34 /* The list of all installed classifier types */
35 static LIST_HEAD(tcf_proto_base
);
37 /* Protects list of registered TC modules. It is pure SMP lock. */
38 static DEFINE_RWLOCK(cls_mod_lock
);
40 /* Find classifier type by string name */
42 static const struct tcf_proto_ops
*tcf_proto_lookup_ops(const char *kind
)
44 const struct tcf_proto_ops
*t
, *res
= NULL
;
47 read_lock(&cls_mod_lock
);
48 list_for_each_entry(t
, &tcf_proto_base
, head
) {
49 if (strcmp(kind
, t
->kind
) == 0) {
50 if (try_module_get(t
->owner
))
55 read_unlock(&cls_mod_lock
);
60 /* Register(unregister) new classifier type */
62 int register_tcf_proto_ops(struct tcf_proto_ops
*ops
)
64 struct tcf_proto_ops
*t
;
67 write_lock(&cls_mod_lock
);
68 list_for_each_entry(t
, &tcf_proto_base
, head
)
69 if (!strcmp(ops
->kind
, t
->kind
))
72 list_add_tail(&ops
->head
, &tcf_proto_base
);
75 write_unlock(&cls_mod_lock
);
78 EXPORT_SYMBOL(register_tcf_proto_ops
);
80 int unregister_tcf_proto_ops(struct tcf_proto_ops
*ops
)
82 struct tcf_proto_ops
*t
;
85 /* Wait for outstanding call_rcu()s, if any, from a
86 * tcf_proto_ops's destroy() handler.
90 write_lock(&cls_mod_lock
);
91 list_for_each_entry(t
, &tcf_proto_base
, head
) {
98 write_unlock(&cls_mod_lock
);
101 EXPORT_SYMBOL(unregister_tcf_proto_ops
);
103 /* Select new prio value from the range, managed by kernel. */
105 static inline u32
tcf_auto_prio(struct tcf_proto
*tp
)
107 u32 first
= TC_H_MAKE(0xC0000000U
, 0U);
110 first
= tp
->prio
- 1;
112 return TC_H_MAJ(first
);
115 static struct tcf_proto
*tcf_proto_create(const char *kind
, u32 protocol
,
116 u32 prio
, u32 parent
, struct Qdisc
*q
,
117 struct tcf_chain
*chain
)
119 struct tcf_proto
*tp
;
122 tp
= kzalloc(sizeof(*tp
), GFP_KERNEL
);
124 return ERR_PTR(-ENOBUFS
);
127 tp
->ops
= tcf_proto_lookup_ops(kind
);
129 #ifdef CONFIG_MODULES
131 request_module("cls_%s", kind
);
133 tp
->ops
= tcf_proto_lookup_ops(kind
);
134 /* We dropped the RTNL semaphore in order to perform
135 * the module load. So, even if we succeeded in loading
136 * the module we have to replay the request. We indicate
137 * this using -EAGAIN.
140 module_put(tp
->ops
->owner
);
148 tp
->classify
= tp
->ops
->classify
;
149 tp
->protocol
= protocol
;
151 tp
->classid
= parent
;
155 err
= tp
->ops
->init(tp
);
157 module_put(tp
->ops
->owner
);
167 static void tcf_proto_destroy(struct tcf_proto
*tp
)
169 tp
->ops
->destroy(tp
);
170 module_put(tp
->ops
->owner
);
174 static struct tcf_chain
*tcf_chain_create(struct tcf_block
*block
,
177 struct tcf_chain
*chain
;
179 chain
= kzalloc(sizeof(*chain
), GFP_KERNEL
);
182 list_add_tail(&chain
->list
, &block
->chain_list
);
183 chain
->block
= block
;
184 chain
->index
= chain_index
;
189 static void tcf_chain_flush(struct tcf_chain
*chain
)
191 struct tcf_proto
*tp
;
193 if (chain
->p_filter_chain
)
194 RCU_INIT_POINTER(*chain
->p_filter_chain
, NULL
);
195 while ((tp
= rtnl_dereference(chain
->filter_chain
)) != NULL
) {
196 RCU_INIT_POINTER(chain
->filter_chain
, tp
->next
);
197 tcf_chain_put(chain
);
198 tcf_proto_destroy(tp
);
202 static void tcf_chain_destroy(struct tcf_chain
*chain
)
204 list_del(&chain
->list
);
208 static void tcf_chain_hold(struct tcf_chain
*chain
)
213 struct tcf_chain
*tcf_chain_get(struct tcf_block
*block
, u32 chain_index
,
216 struct tcf_chain
*chain
;
218 list_for_each_entry(chain
, &block
->chain_list
, list
) {
219 if (chain
->index
== chain_index
) {
220 tcf_chain_hold(chain
);
225 return create
? tcf_chain_create(block
, chain_index
) : NULL
;
227 EXPORT_SYMBOL(tcf_chain_get
);
229 void tcf_chain_put(struct tcf_chain
*chain
)
231 if (--chain
->refcnt
== 0)
232 tcf_chain_destroy(chain
);
234 EXPORT_SYMBOL(tcf_chain_put
);
237 tcf_chain_filter_chain_ptr_set(struct tcf_chain
*chain
,
238 struct tcf_proto __rcu
**p_filter_chain
)
240 chain
->p_filter_chain
= p_filter_chain
;
243 int tcf_block_get(struct tcf_block
**p_block
,
244 struct tcf_proto __rcu
**p_filter_chain
)
246 struct tcf_block
*block
= kzalloc(sizeof(*block
), GFP_KERNEL
);
247 struct tcf_chain
*chain
;
252 INIT_LIST_HEAD(&block
->chain_list
);
253 /* Create chain 0 by default, it has to be always present. */
254 chain
= tcf_chain_create(block
, 0);
257 goto err_chain_create
;
259 tcf_chain_filter_chain_ptr_set(chain
, p_filter_chain
);
267 EXPORT_SYMBOL(tcf_block_get
);
269 void tcf_block_put(struct tcf_block
*block
)
271 struct tcf_chain
*chain
, *tmp
;
276 /* XXX: Standalone actions are not allowed to jump to any chain, and
277 * bound actions should be all removed after flushing. However,
278 * filters are destroyed in RCU callbacks, we have to hold the chains
279 * first, otherwise we would always race with RCU callbacks on this list
280 * without proper locking.
283 /* Wait for existing RCU callbacks to cool down. */
286 /* Hold a refcnt for all chains, except 0, in case they are gone. */
287 list_for_each_entry(chain
, &block
->chain_list
, list
)
289 tcf_chain_hold(chain
);
291 /* No race on the list, because no chain could be destroyed. */
292 list_for_each_entry(chain
, &block
->chain_list
, list
)
293 tcf_chain_flush(chain
);
295 /* Wait for RCU callbacks to release the reference count. */
298 /* At this point, all the chains should have refcnt == 1. */
299 list_for_each_entry_safe(chain
, tmp
, &block
->chain_list
, list
)
300 tcf_chain_put(chain
);
303 EXPORT_SYMBOL(tcf_block_put
);
305 /* Main classifier routine: scans classifier chain attached
306 * to this qdisc, (optionally) tests for protocol and asks
307 * specific classifiers.
309 int tcf_classify(struct sk_buff
*skb
, const struct tcf_proto
*tp
,
310 struct tcf_result
*res
, bool compat_mode
)
312 __be16 protocol
= tc_skb_protocol(skb
);
313 #ifdef CONFIG_NET_CLS_ACT
314 const int max_reclassify_loop
= 4;
315 const struct tcf_proto
*orig_tp
= tp
;
316 const struct tcf_proto
*first_tp
;
321 for (; tp
; tp
= rcu_dereference_bh(tp
->next
)) {
324 if (tp
->protocol
!= protocol
&&
325 tp
->protocol
!= htons(ETH_P_ALL
))
328 err
= tp
->classify(skb
, tp
, res
);
329 #ifdef CONFIG_NET_CLS_ACT
330 if (unlikely(err
== TC_ACT_RECLASSIFY
&& !compat_mode
)) {
333 } else if (unlikely(TC_ACT_EXT_CMP(err
, TC_ACT_GOTO_CHAIN
))) {
334 first_tp
= res
->goto_tp
;
342 return TC_ACT_UNSPEC
; /* signal: continue lookup */
343 #ifdef CONFIG_NET_CLS_ACT
345 if (unlikely(limit
++ >= max_reclassify_loop
)) {
346 net_notice_ratelimited("%s: reclassify loop, rule prio %u, protocol %02x\n",
347 tp
->q
->ops
->id
, tp
->prio
& 0xffff,
348 ntohs(tp
->protocol
));
353 protocol
= tc_skb_protocol(skb
);
357 EXPORT_SYMBOL(tcf_classify
);
359 struct tcf_chain_info
{
360 struct tcf_proto __rcu
**pprev
;
361 struct tcf_proto __rcu
*next
;
364 static struct tcf_proto
*tcf_chain_tp_prev(struct tcf_chain_info
*chain_info
)
366 return rtnl_dereference(*chain_info
->pprev
);
369 static void tcf_chain_tp_insert(struct tcf_chain
*chain
,
370 struct tcf_chain_info
*chain_info
,
371 struct tcf_proto
*tp
)
373 if (chain
->p_filter_chain
&&
374 *chain_info
->pprev
== chain
->filter_chain
)
375 rcu_assign_pointer(*chain
->p_filter_chain
, tp
);
376 RCU_INIT_POINTER(tp
->next
, tcf_chain_tp_prev(chain_info
));
377 rcu_assign_pointer(*chain_info
->pprev
, tp
);
378 tcf_chain_hold(chain
);
381 static void tcf_chain_tp_remove(struct tcf_chain
*chain
,
382 struct tcf_chain_info
*chain_info
,
383 struct tcf_proto
*tp
)
385 struct tcf_proto
*next
= rtnl_dereference(chain_info
->next
);
387 if (chain
->p_filter_chain
&& tp
== chain
->filter_chain
)
388 RCU_INIT_POINTER(*chain
->p_filter_chain
, next
);
389 RCU_INIT_POINTER(*chain_info
->pprev
, next
);
390 tcf_chain_put(chain
);
393 static struct tcf_proto
*tcf_chain_tp_find(struct tcf_chain
*chain
,
394 struct tcf_chain_info
*chain_info
,
395 u32 protocol
, u32 prio
,
398 struct tcf_proto
**pprev
;
399 struct tcf_proto
*tp
;
401 /* Check the chain for existence of proto-tcf with this priority */
402 for (pprev
= &chain
->filter_chain
;
403 (tp
= rtnl_dereference(*pprev
)); pprev
= &tp
->next
) {
404 if (tp
->prio
>= prio
) {
405 if (tp
->prio
== prio
) {
407 (tp
->protocol
!= protocol
&& protocol
))
408 return ERR_PTR(-EINVAL
);
415 chain_info
->pprev
= pprev
;
416 chain_info
->next
= tp
? tp
->next
: NULL
;
420 static int tcf_fill_node(struct net
*net
, struct sk_buff
*skb
,
421 struct tcf_proto
*tp
, void *fh
, u32 portid
,
422 u32 seq
, u16 flags
, int event
)
425 struct nlmsghdr
*nlh
;
426 unsigned char *b
= skb_tail_pointer(skb
);
428 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*tcm
), flags
);
431 tcm
= nlmsg_data(nlh
);
432 tcm
->tcm_family
= AF_UNSPEC
;
435 tcm
->tcm_ifindex
= qdisc_dev(tp
->q
)->ifindex
;
436 tcm
->tcm_parent
= tp
->classid
;
437 tcm
->tcm_info
= TC_H_MAKE(tp
->prio
, tp
->protocol
);
438 if (nla_put_string(skb
, TCA_KIND
, tp
->ops
->kind
))
439 goto nla_put_failure
;
440 if (nla_put_u32(skb
, TCA_CHAIN
, tp
->chain
->index
))
441 goto nla_put_failure
;
445 if (tp
->ops
->dump
&& tp
->ops
->dump(net
, tp
, fh
, skb
, tcm
) < 0)
446 goto nla_put_failure
;
448 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
457 static int tfilter_notify(struct net
*net
, struct sk_buff
*oskb
,
458 struct nlmsghdr
*n
, struct tcf_proto
*tp
,
459 void *fh
, int event
, bool unicast
)
462 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
464 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
468 if (tcf_fill_node(net
, skb
, tp
, fh
, portid
, n
->nlmsg_seq
,
469 n
->nlmsg_flags
, event
) <= 0) {
475 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
477 return rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
478 n
->nlmsg_flags
& NLM_F_ECHO
);
481 static int tfilter_del_notify(struct net
*net
, struct sk_buff
*oskb
,
482 struct nlmsghdr
*n
, struct tcf_proto
*tp
,
483 void *fh
, bool unicast
, bool *last
)
486 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
489 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
493 if (tcf_fill_node(net
, skb
, tp
, fh
, portid
, n
->nlmsg_seq
,
494 n
->nlmsg_flags
, RTM_DELTFILTER
) <= 0) {
499 err
= tp
->ops
->delete(tp
, fh
, last
);
506 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
508 return rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
509 n
->nlmsg_flags
& NLM_F_ECHO
);
512 static void tfilter_notify_chain(struct net
*net
, struct sk_buff
*oskb
,
514 struct tcf_chain
*chain
, int event
)
516 struct tcf_proto
*tp
;
518 for (tp
= rtnl_dereference(chain
->filter_chain
);
519 tp
; tp
= rtnl_dereference(tp
->next
))
520 tfilter_notify(net
, oskb
, n
, tp
, 0, event
, false);
523 /* Add/change/delete/get a filter node */
525 static int tc_ctl_tfilter(struct sk_buff
*skb
, struct nlmsghdr
*n
,
526 struct netlink_ext_ack
*extack
)
528 struct net
*net
= sock_net(skb
->sk
);
529 struct nlattr
*tca
[TCA_MAX
+ 1];
536 struct net_device
*dev
;
538 struct tcf_chain_info chain_info
;
539 struct tcf_chain
*chain
= NULL
;
540 struct tcf_block
*block
;
541 struct tcf_proto
*tp
;
542 const struct Qdisc_class_ops
*cops
;
548 if ((n
->nlmsg_type
!= RTM_GETTFILTER
) &&
549 !netlink_ns_capable(skb
, net
->user_ns
, CAP_NET_ADMIN
))
555 err
= nlmsg_parse(n
, sizeof(*t
), tca
, TCA_MAX
, NULL
, extack
);
560 protocol
= TC_H_MIN(t
->tcm_info
);
561 prio
= TC_H_MAJ(t
->tcm_info
);
562 prio_allocate
= false;
563 parent
= t
->tcm_parent
;
567 switch (n
->nlmsg_type
) {
569 if (protocol
|| t
->tcm_handle
|| tca
[TCA_KIND
])
573 /* If no priority is provided by the user,
576 if (n
->nlmsg_flags
& NLM_F_CREATE
) {
577 prio
= TC_H_MAKE(0x80000000U
, 0U);
578 prio_allocate
= true;
587 /* Find head of filter chain. */
590 dev
= __dev_get_by_index(net
, t
->tcm_ifindex
);
599 q
= qdisc_lookup(dev
, TC_H_MAJ(t
->tcm_parent
));
604 /* Is it classful? */
605 cops
= q
->ops
->cl_ops
;
609 if (!cops
->tcf_block
)
612 /* Do we search for filter, attached to class? */
613 if (TC_H_MIN(parent
)) {
614 cl
= cops
->find(q
, parent
);
619 /* And the last stroke */
620 block
= cops
->tcf_block(q
, cl
);
626 chain_index
= tca
[TCA_CHAIN
] ? nla_get_u32(tca
[TCA_CHAIN
]) : 0;
627 if (chain_index
> TC_ACT_EXT_VAL_MASK
) {
631 chain
= tcf_chain_get(block
, chain_index
,
632 n
->nlmsg_type
== RTM_NEWTFILTER
);
634 err
= n
->nlmsg_type
== RTM_NEWTFILTER
? -ENOMEM
: -EINVAL
;
638 if (n
->nlmsg_type
== RTM_DELTFILTER
&& prio
== 0) {
639 tfilter_notify_chain(net
, skb
, n
, chain
, RTM_DELTFILTER
);
640 tcf_chain_flush(chain
);
645 tp
= tcf_chain_tp_find(chain
, &chain_info
, protocol
,
646 prio
, prio_allocate
);
653 /* Proto-tcf does not exist, create new one */
655 if (tca
[TCA_KIND
] == NULL
|| !protocol
) {
660 if (n
->nlmsg_type
!= RTM_NEWTFILTER
||
661 !(n
->nlmsg_flags
& NLM_F_CREATE
)) {
667 prio
= tcf_auto_prio(tcf_chain_tp_prev(&chain_info
));
669 tp
= tcf_proto_create(nla_data(tca
[TCA_KIND
]),
670 protocol
, prio
, parent
, q
, chain
);
676 } else if (tca
[TCA_KIND
] && nla_strcmp(tca
[TCA_KIND
], tp
->ops
->kind
)) {
681 fh
= tp
->ops
->get(tp
, t
->tcm_handle
);
684 if (n
->nlmsg_type
== RTM_DELTFILTER
&& t
->tcm_handle
== 0) {
685 tcf_chain_tp_remove(chain
, &chain_info
, tp
);
686 tfilter_notify(net
, skb
, n
, tp
, fh
,
687 RTM_DELTFILTER
, false);
688 tcf_proto_destroy(tp
);
693 if (n
->nlmsg_type
!= RTM_NEWTFILTER
||
694 !(n
->nlmsg_flags
& NLM_F_CREATE
)) {
701 switch (n
->nlmsg_type
) {
703 if (n
->nlmsg_flags
& NLM_F_EXCL
) {
705 tcf_proto_destroy(tp
);
711 err
= tfilter_del_notify(net
, skb
, n
, tp
, fh
, false,
716 tcf_chain_tp_remove(chain
, &chain_info
, tp
);
717 tcf_proto_destroy(tp
);
721 err
= tfilter_notify(net
, skb
, n
, tp
, fh
,
722 RTM_NEWTFILTER
, true);
730 err
= tp
->ops
->change(net
, skb
, tp
, cl
, t
->tcm_handle
, tca
, &fh
,
731 n
->nlmsg_flags
& NLM_F_CREATE
? TCA_ACT_NOREPLACE
: TCA_ACT_REPLACE
);
734 tcf_chain_tp_insert(chain
, &chain_info
, tp
);
735 tfilter_notify(net
, skb
, n
, tp
, fh
, RTM_NEWTFILTER
, false);
738 tcf_proto_destroy(tp
);
743 tcf_chain_put(chain
);
745 /* Replay the request. */
750 struct tcf_dump_args
{
753 struct netlink_callback
*cb
;
756 static int tcf_node_dump(struct tcf_proto
*tp
, void *n
, struct tcf_walker
*arg
)
758 struct tcf_dump_args
*a
= (void *)arg
;
759 struct net
*net
= sock_net(a
->skb
->sk
);
761 return tcf_fill_node(net
, a
->skb
, tp
, n
, NETLINK_CB(a
->cb
->skb
).portid
,
762 a
->cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
766 static bool tcf_chain_dump(struct tcf_chain
*chain
, struct sk_buff
*skb
,
767 struct netlink_callback
*cb
,
768 long index_start
, long *p_index
)
770 struct net
*net
= sock_net(skb
->sk
);
771 struct tcmsg
*tcm
= nlmsg_data(cb
->nlh
);
772 struct tcf_dump_args arg
;
773 struct tcf_proto
*tp
;
775 for (tp
= rtnl_dereference(chain
->filter_chain
);
776 tp
; tp
= rtnl_dereference(tp
->next
), (*p_index
)++) {
777 if (*p_index
< index_start
)
779 if (TC_H_MAJ(tcm
->tcm_info
) &&
780 TC_H_MAJ(tcm
->tcm_info
) != tp
->prio
)
782 if (TC_H_MIN(tcm
->tcm_info
) &&
783 TC_H_MIN(tcm
->tcm_info
) != tp
->protocol
)
785 if (*p_index
> index_start
)
786 memset(&cb
->args
[1], 0,
787 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
788 if (cb
->args
[1] == 0) {
789 if (tcf_fill_node(net
, skb
, tp
, 0,
790 NETLINK_CB(cb
->skb
).portid
,
791 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
792 RTM_NEWTFILTER
) <= 0)
799 arg
.w
.fn
= tcf_node_dump
;
803 arg
.w
.skip
= cb
->args
[1] - 1;
805 tp
->ops
->walk(tp
, &arg
.w
);
806 cb
->args
[1] = arg
.w
.count
+ 1;
813 /* called with RTNL */
814 static int tc_dump_tfilter(struct sk_buff
*skb
, struct netlink_callback
*cb
)
816 struct net
*net
= sock_net(skb
->sk
);
817 struct nlattr
*tca
[TCA_MAX
+ 1];
818 struct net_device
*dev
;
820 struct tcf_block
*block
;
821 struct tcf_chain
*chain
;
822 struct tcmsg
*tcm
= nlmsg_data(cb
->nlh
);
823 unsigned long cl
= 0;
824 const struct Qdisc_class_ops
*cops
;
829 if (nlmsg_len(cb
->nlh
) < sizeof(*tcm
))
832 err
= nlmsg_parse(cb
->nlh
, sizeof(*tcm
), tca
, TCA_MAX
, NULL
, NULL
);
836 dev
= __dev_get_by_index(net
, tcm
->tcm_ifindex
);
840 if (!tcm
->tcm_parent
)
843 q
= qdisc_lookup(dev
, TC_H_MAJ(tcm
->tcm_parent
));
846 cops
= q
->ops
->cl_ops
;
849 if (!cops
->tcf_block
)
851 if (TC_H_MIN(tcm
->tcm_parent
)) {
852 cl
= cops
->find(q
, tcm
->tcm_parent
);
856 block
= cops
->tcf_block(q
, cl
);
860 index_start
= cb
->args
[0];
863 list_for_each_entry(chain
, &block
->chain_list
, list
) {
864 if (tca
[TCA_CHAIN
] &&
865 nla_get_u32(tca
[TCA_CHAIN
]) != chain
->index
)
867 if (!tcf_chain_dump(chain
, skb
, cb
, index_start
, &index
))
877 void tcf_exts_destroy(struct tcf_exts
*exts
)
879 #ifdef CONFIG_NET_CLS_ACT
882 tcf_exts_to_list(exts
, &actions
);
883 tcf_action_destroy(&actions
, TCA_ACT_UNBIND
);
884 kfree(exts
->actions
);
885 exts
->nr_actions
= 0;
888 EXPORT_SYMBOL(tcf_exts_destroy
);
890 int tcf_exts_validate(struct net
*net
, struct tcf_proto
*tp
, struct nlattr
**tb
,
891 struct nlattr
*rate_tlv
, struct tcf_exts
*exts
, bool ovr
)
893 #ifdef CONFIG_NET_CLS_ACT
895 struct tc_action
*act
;
897 if (exts
->police
&& tb
[exts
->police
]) {
898 act
= tcf_action_init_1(net
, tp
, tb
[exts
->police
],
899 rate_tlv
, "police", ovr
,
904 act
->type
= exts
->type
= TCA_OLD_COMPAT
;
905 exts
->actions
[0] = act
;
906 exts
->nr_actions
= 1;
907 } else if (exts
->action
&& tb
[exts
->action
]) {
911 err
= tcf_action_init(net
, tp
, tb
[exts
->action
],
912 rate_tlv
, NULL
, ovr
, TCA_ACT_BIND
,
916 list_for_each_entry(act
, &actions
, list
)
917 exts
->actions
[i
++] = act
;
918 exts
->nr_actions
= i
;
922 if ((exts
->action
&& tb
[exts
->action
]) ||
923 (exts
->police
&& tb
[exts
->police
]))
929 EXPORT_SYMBOL(tcf_exts_validate
);
931 void tcf_exts_change(struct tcf_exts
*dst
, struct tcf_exts
*src
)
933 #ifdef CONFIG_NET_CLS_ACT
934 struct tcf_exts old
= *dst
;
937 tcf_exts_destroy(&old
);
940 EXPORT_SYMBOL(tcf_exts_change
);
942 #ifdef CONFIG_NET_CLS_ACT
943 static struct tc_action
*tcf_exts_first_act(struct tcf_exts
*exts
)
945 if (exts
->nr_actions
== 0)
948 return exts
->actions
[0];
952 int tcf_exts_dump(struct sk_buff
*skb
, struct tcf_exts
*exts
)
954 #ifdef CONFIG_NET_CLS_ACT
957 if (exts
->action
&& tcf_exts_has_actions(exts
)) {
959 * again for backward compatible mode - we want
960 * to work with both old and new modes of entering
961 * tc data even if iproute2 was newer - jhs
963 if (exts
->type
!= TCA_OLD_COMPAT
) {
966 nest
= nla_nest_start(skb
, exts
->action
);
968 goto nla_put_failure
;
970 tcf_exts_to_list(exts
, &actions
);
971 if (tcf_action_dump(skb
, &actions
, 0, 0) < 0)
972 goto nla_put_failure
;
973 nla_nest_end(skb
, nest
);
974 } else if (exts
->police
) {
975 struct tc_action
*act
= tcf_exts_first_act(exts
);
976 nest
= nla_nest_start(skb
, exts
->police
);
977 if (nest
== NULL
|| !act
)
978 goto nla_put_failure
;
979 if (tcf_action_dump_old(skb
, act
, 0, 0) < 0)
980 goto nla_put_failure
;
981 nla_nest_end(skb
, nest
);
987 nla_nest_cancel(skb
, nest
);
993 EXPORT_SYMBOL(tcf_exts_dump
);
996 int tcf_exts_dump_stats(struct sk_buff
*skb
, struct tcf_exts
*exts
)
998 #ifdef CONFIG_NET_CLS_ACT
999 struct tc_action
*a
= tcf_exts_first_act(exts
);
1000 if (a
!= NULL
&& tcf_action_copy_stats(skb
, a
, 1) < 0)
1005 EXPORT_SYMBOL(tcf_exts_dump_stats
);
1007 int tcf_exts_get_dev(struct net_device
*dev
, struct tcf_exts
*exts
,
1008 struct net_device
**hw_dev
)
1010 #ifdef CONFIG_NET_CLS_ACT
1011 const struct tc_action
*a
;
1014 if (!tcf_exts_has_actions(exts
))
1017 tcf_exts_to_list(exts
, &actions
);
1018 list_for_each_entry(a
, &actions
, list
) {
1019 if (a
->ops
->get_dev
) {
1020 a
->ops
->get_dev(a
, dev_net(dev
), hw_dev
);
1029 EXPORT_SYMBOL(tcf_exts_get_dev
);
1031 static int __init
tc_filter_init(void)
1033 rtnl_register(PF_UNSPEC
, RTM_NEWTFILTER
, tc_ctl_tfilter
, NULL
, 0);
1034 rtnl_register(PF_UNSPEC
, RTM_DELTFILTER
, tc_ctl_tfilter
, NULL
, 0);
1035 rtnl_register(PF_UNSPEC
, RTM_GETTFILTER
, tc_ctl_tfilter
,
1036 tc_dump_tfilter
, 0);
1041 subsys_initcall(tc_filter_init
);