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/slab.h>
27 #include <linux/idr.h>
28 #include <linux/rhashtable.h>
29 #include <net/net_namespace.h>
31 #include <net/netlink.h>
32 #include <net/pkt_sched.h>
33 #include <net/pkt_cls.h>
34 #include <net/tc_act/tc_pedit.h>
35 #include <net/tc_act/tc_mirred.h>
36 #include <net/tc_act/tc_vlan.h>
37 #include <net/tc_act/tc_tunnel_key.h>
38 #include <net/tc_act/tc_csum.h>
39 #include <net/tc_act/tc_gact.h>
40 #include <net/tc_act/tc_skbedit.h>
42 extern const struct nla_policy rtm_tca_policy
[TCA_MAX
+ 1];
44 /* The list of all installed classifier types */
45 static LIST_HEAD(tcf_proto_base
);
47 /* Protects list of registered TC modules. It is pure SMP lock. */
48 static DEFINE_RWLOCK(cls_mod_lock
);
50 /* Find classifier type by string name */
52 static const struct tcf_proto_ops
*__tcf_proto_lookup_ops(const char *kind
)
54 const struct tcf_proto_ops
*t
, *res
= NULL
;
57 read_lock(&cls_mod_lock
);
58 list_for_each_entry(t
, &tcf_proto_base
, head
) {
59 if (strcmp(kind
, t
->kind
) == 0) {
60 if (try_module_get(t
->owner
))
65 read_unlock(&cls_mod_lock
);
70 static const struct tcf_proto_ops
*
71 tcf_proto_lookup_ops(const char *kind
, bool rtnl_held
,
72 struct netlink_ext_ack
*extack
)
74 const struct tcf_proto_ops
*ops
;
76 ops
= __tcf_proto_lookup_ops(kind
);
82 request_module("cls_%s", kind
);
85 ops
= __tcf_proto_lookup_ops(kind
);
86 /* We dropped the RTNL semaphore in order to perform
87 * the module load. So, even if we succeeded in loading
88 * the module we have to replay the request. We indicate
92 module_put(ops
->owner
);
93 return ERR_PTR(-EAGAIN
);
96 NL_SET_ERR_MSG(extack
, "TC classifier not found");
97 return ERR_PTR(-ENOENT
);
100 /* Register(unregister) new classifier type */
102 int register_tcf_proto_ops(struct tcf_proto_ops
*ops
)
104 struct tcf_proto_ops
*t
;
107 write_lock(&cls_mod_lock
);
108 list_for_each_entry(t
, &tcf_proto_base
, head
)
109 if (!strcmp(ops
->kind
, t
->kind
))
112 list_add_tail(&ops
->head
, &tcf_proto_base
);
115 write_unlock(&cls_mod_lock
);
118 EXPORT_SYMBOL(register_tcf_proto_ops
);
120 static struct workqueue_struct
*tc_filter_wq
;
122 int unregister_tcf_proto_ops(struct tcf_proto_ops
*ops
)
124 struct tcf_proto_ops
*t
;
127 /* Wait for outstanding call_rcu()s, if any, from a
128 * tcf_proto_ops's destroy() handler.
131 flush_workqueue(tc_filter_wq
);
133 write_lock(&cls_mod_lock
);
134 list_for_each_entry(t
, &tcf_proto_base
, head
) {
141 write_unlock(&cls_mod_lock
);
144 EXPORT_SYMBOL(unregister_tcf_proto_ops
);
146 bool tcf_queue_work(struct rcu_work
*rwork
, work_func_t func
)
148 INIT_RCU_WORK(rwork
, func
);
149 return queue_rcu_work(tc_filter_wq
, rwork
);
151 EXPORT_SYMBOL(tcf_queue_work
);
153 /* Select new prio value from the range, managed by kernel. */
155 static inline u32
tcf_auto_prio(struct tcf_proto
*tp
)
157 u32 first
= TC_H_MAKE(0xC0000000U
, 0U);
160 first
= tp
->prio
- 1;
162 return TC_H_MAJ(first
);
165 static bool tcf_proto_is_unlocked(const char *kind
)
167 const struct tcf_proto_ops
*ops
;
170 ops
= tcf_proto_lookup_ops(kind
, false, NULL
);
171 /* On error return false to take rtnl lock. Proto lookup/create
172 * functions will perform lookup again and properly handle errors.
177 ret
= !!(ops
->flags
& TCF_PROTO_OPS_DOIT_UNLOCKED
);
178 module_put(ops
->owner
);
182 static struct tcf_proto
*tcf_proto_create(const char *kind
, u32 protocol
,
183 u32 prio
, struct tcf_chain
*chain
,
185 struct netlink_ext_ack
*extack
)
187 struct tcf_proto
*tp
;
190 tp
= kzalloc(sizeof(*tp
), GFP_KERNEL
);
192 return ERR_PTR(-ENOBUFS
);
194 tp
->ops
= tcf_proto_lookup_ops(kind
, rtnl_held
, extack
);
195 if (IS_ERR(tp
->ops
)) {
196 err
= PTR_ERR(tp
->ops
);
199 tp
->classify
= tp
->ops
->classify
;
200 tp
->protocol
= protocol
;
203 spin_lock_init(&tp
->lock
);
204 refcount_set(&tp
->refcnt
, 1);
206 err
= tp
->ops
->init(tp
);
208 module_put(tp
->ops
->owner
);
218 static void tcf_proto_get(struct tcf_proto
*tp
)
220 refcount_inc(&tp
->refcnt
);
223 static void tcf_chain_put(struct tcf_chain
*chain
);
225 static void tcf_proto_destroy(struct tcf_proto
*tp
, bool rtnl_held
,
226 struct netlink_ext_ack
*extack
)
228 tp
->ops
->destroy(tp
, rtnl_held
, extack
);
229 tcf_chain_put(tp
->chain
);
230 module_put(tp
->ops
->owner
);
234 static void tcf_proto_put(struct tcf_proto
*tp
, bool rtnl_held
,
235 struct netlink_ext_ack
*extack
)
237 if (refcount_dec_and_test(&tp
->refcnt
))
238 tcf_proto_destroy(tp
, rtnl_held
, extack
);
241 static int walker_check_empty(struct tcf_proto
*tp
, void *fh
,
242 struct tcf_walker
*arg
)
245 arg
->nonempty
= true;
251 static bool tcf_proto_is_empty(struct tcf_proto
*tp
, bool rtnl_held
)
253 struct tcf_walker walker
= { .fn
= walker_check_empty
, };
256 tp
->ops
->walk(tp
, &walker
, rtnl_held
);
257 return !walker
.nonempty
;
262 static bool tcf_proto_check_delete(struct tcf_proto
*tp
, bool rtnl_held
)
264 spin_lock(&tp
->lock
);
265 if (tcf_proto_is_empty(tp
, rtnl_held
))
267 spin_unlock(&tp
->lock
);
271 static void tcf_proto_mark_delete(struct tcf_proto
*tp
)
273 spin_lock(&tp
->lock
);
275 spin_unlock(&tp
->lock
);
278 static bool tcf_proto_is_deleting(struct tcf_proto
*tp
)
282 spin_lock(&tp
->lock
);
283 deleting
= tp
->deleting
;
284 spin_unlock(&tp
->lock
);
289 #define ASSERT_BLOCK_LOCKED(block) \
290 lockdep_assert_held(&(block)->lock)
292 struct tcf_filter_chain_list_item
{
293 struct list_head list
;
294 tcf_chain_head_change_t
*chain_head_change
;
295 void *chain_head_change_priv
;
298 static struct tcf_chain
*tcf_chain_create(struct tcf_block
*block
,
301 struct tcf_chain
*chain
;
303 ASSERT_BLOCK_LOCKED(block
);
305 chain
= kzalloc(sizeof(*chain
), GFP_KERNEL
);
308 list_add_tail(&chain
->list
, &block
->chain_list
);
309 mutex_init(&chain
->filter_chain_lock
);
310 chain
->block
= block
;
311 chain
->index
= chain_index
;
314 block
->chain0
.chain
= chain
;
318 static void tcf_chain_head_change_item(struct tcf_filter_chain_list_item
*item
,
319 struct tcf_proto
*tp_head
)
321 if (item
->chain_head_change
)
322 item
->chain_head_change(tp_head
, item
->chain_head_change_priv
);
325 static void tcf_chain0_head_change(struct tcf_chain
*chain
,
326 struct tcf_proto
*tp_head
)
328 struct tcf_filter_chain_list_item
*item
;
329 struct tcf_block
*block
= chain
->block
;
334 mutex_lock(&block
->lock
);
335 list_for_each_entry(item
, &block
->chain0
.filter_chain_list
, list
)
336 tcf_chain_head_change_item(item
, tp_head
);
337 mutex_unlock(&block
->lock
);
340 /* Returns true if block can be safely freed. */
342 static bool tcf_chain_detach(struct tcf_chain
*chain
)
344 struct tcf_block
*block
= chain
->block
;
346 ASSERT_BLOCK_LOCKED(block
);
348 list_del(&chain
->list
);
350 block
->chain0
.chain
= NULL
;
352 if (list_empty(&block
->chain_list
) &&
353 refcount_read(&block
->refcnt
) == 0)
359 static void tcf_block_destroy(struct tcf_block
*block
)
361 mutex_destroy(&block
->lock
);
362 kfree_rcu(block
, rcu
);
365 static void tcf_chain_destroy(struct tcf_chain
*chain
, bool free_block
)
367 struct tcf_block
*block
= chain
->block
;
369 mutex_destroy(&chain
->filter_chain_lock
);
372 tcf_block_destroy(block
);
375 static void tcf_chain_hold(struct tcf_chain
*chain
)
377 ASSERT_BLOCK_LOCKED(chain
->block
);
382 static bool tcf_chain_held_by_acts_only(struct tcf_chain
*chain
)
384 ASSERT_BLOCK_LOCKED(chain
->block
);
386 /* In case all the references are action references, this
387 * chain should not be shown to the user.
389 return chain
->refcnt
== chain
->action_refcnt
;
392 static struct tcf_chain
*tcf_chain_lookup(struct tcf_block
*block
,
395 struct tcf_chain
*chain
;
397 ASSERT_BLOCK_LOCKED(block
);
399 list_for_each_entry(chain
, &block
->chain_list
, list
) {
400 if (chain
->index
== chain_index
)
406 static int tc_chain_notify(struct tcf_chain
*chain
, struct sk_buff
*oskb
,
407 u32 seq
, u16 flags
, int event
, bool unicast
);
409 static struct tcf_chain
*__tcf_chain_get(struct tcf_block
*block
,
410 u32 chain_index
, bool create
,
413 struct tcf_chain
*chain
= NULL
;
414 bool is_first_reference
;
416 mutex_lock(&block
->lock
);
417 chain
= tcf_chain_lookup(block
, chain_index
);
419 tcf_chain_hold(chain
);
423 chain
= tcf_chain_create(block
, chain_index
);
429 ++chain
->action_refcnt
;
430 is_first_reference
= chain
->refcnt
- chain
->action_refcnt
== 1;
431 mutex_unlock(&block
->lock
);
433 /* Send notification only in case we got the first
434 * non-action reference. Until then, the chain acts only as
435 * a placeholder for actions pointing to it and user ought
436 * not know about them.
438 if (is_first_reference
&& !by_act
)
439 tc_chain_notify(chain
, NULL
, 0, NLM_F_CREATE
| NLM_F_EXCL
,
440 RTM_NEWCHAIN
, false);
445 mutex_unlock(&block
->lock
);
449 static struct tcf_chain
*tcf_chain_get(struct tcf_block
*block
, u32 chain_index
,
452 return __tcf_chain_get(block
, chain_index
, create
, false);
455 struct tcf_chain
*tcf_chain_get_by_act(struct tcf_block
*block
, u32 chain_index
)
457 return __tcf_chain_get(block
, chain_index
, true, true);
459 EXPORT_SYMBOL(tcf_chain_get_by_act
);
461 static void tc_chain_tmplt_del(const struct tcf_proto_ops
*tmplt_ops
,
463 static int tc_chain_notify_delete(const struct tcf_proto_ops
*tmplt_ops
,
464 void *tmplt_priv
, u32 chain_index
,
465 struct tcf_block
*block
, struct sk_buff
*oskb
,
466 u32 seq
, u16 flags
, bool unicast
);
468 static void __tcf_chain_put(struct tcf_chain
*chain
, bool by_act
,
469 bool explicitly_created
)
471 struct tcf_block
*block
= chain
->block
;
472 const struct tcf_proto_ops
*tmplt_ops
;
473 bool is_last
, free_block
= false;
478 mutex_lock(&block
->lock
);
479 if (explicitly_created
) {
480 if (!chain
->explicitly_created
) {
481 mutex_unlock(&block
->lock
);
484 chain
->explicitly_created
= false;
488 chain
->action_refcnt
--;
490 /* tc_chain_notify_delete can't be called while holding block lock.
491 * However, when block is unlocked chain can be changed concurrently, so
492 * save these to temporary variables.
494 refcnt
= --chain
->refcnt
;
495 is_last
= refcnt
- chain
->action_refcnt
== 0;
496 tmplt_ops
= chain
->tmplt_ops
;
497 tmplt_priv
= chain
->tmplt_priv
;
498 chain_index
= chain
->index
;
501 free_block
= tcf_chain_detach(chain
);
502 mutex_unlock(&block
->lock
);
504 /* The last dropped non-action reference will trigger notification. */
505 if (is_last
&& !by_act
) {
506 tc_chain_notify_delete(tmplt_ops
, tmplt_priv
, chain_index
,
507 block
, NULL
, 0, 0, false);
508 /* Last reference to chain, no need to lock. */
509 chain
->flushing
= false;
513 tc_chain_tmplt_del(tmplt_ops
, tmplt_priv
);
514 tcf_chain_destroy(chain
, free_block
);
518 static void tcf_chain_put(struct tcf_chain
*chain
)
520 __tcf_chain_put(chain
, false, false);
523 void tcf_chain_put_by_act(struct tcf_chain
*chain
)
525 __tcf_chain_put(chain
, true, false);
527 EXPORT_SYMBOL(tcf_chain_put_by_act
);
529 static void tcf_chain_put_explicitly_created(struct tcf_chain
*chain
)
531 __tcf_chain_put(chain
, false, true);
534 static void tcf_chain_flush(struct tcf_chain
*chain
, bool rtnl_held
)
536 struct tcf_proto
*tp
, *tp_next
;
538 mutex_lock(&chain
->filter_chain_lock
);
539 tp
= tcf_chain_dereference(chain
->filter_chain
, chain
);
540 RCU_INIT_POINTER(chain
->filter_chain
, NULL
);
541 tcf_chain0_head_change(chain
, NULL
);
542 chain
->flushing
= true;
543 mutex_unlock(&chain
->filter_chain_lock
);
546 tp_next
= rcu_dereference_protected(tp
->next
, 1);
547 tcf_proto_put(tp
, rtnl_held
, NULL
);
552 static struct tcf_block
*tc_dev_ingress_block(struct net_device
*dev
)
554 const struct Qdisc_class_ops
*cops
;
557 if (!dev_ingress_queue(dev
))
560 qdisc
= dev_ingress_queue(dev
)->qdisc_sleeping
;
564 cops
= qdisc
->ops
->cl_ops
;
568 if (!cops
->tcf_block
)
571 return cops
->tcf_block(qdisc
, TC_H_MIN_INGRESS
, NULL
);
574 static struct rhashtable indr_setup_block_ht
;
576 struct tc_indr_block_dev
{
577 struct rhash_head ht_node
;
578 struct net_device
*dev
;
580 struct list_head cb_list
;
581 struct tcf_block
*block
;
584 struct tc_indr_block_cb
{
585 struct list_head list
;
587 tc_indr_block_bind_cb_t
*cb
;
591 static const struct rhashtable_params tc_indr_setup_block_ht_params
= {
592 .key_offset
= offsetof(struct tc_indr_block_dev
, dev
),
593 .head_offset
= offsetof(struct tc_indr_block_dev
, ht_node
),
594 .key_len
= sizeof(struct net_device
*),
597 static struct tc_indr_block_dev
*
598 tc_indr_block_dev_lookup(struct net_device
*dev
)
600 return rhashtable_lookup_fast(&indr_setup_block_ht
, &dev
,
601 tc_indr_setup_block_ht_params
);
604 static struct tc_indr_block_dev
*tc_indr_block_dev_get(struct net_device
*dev
)
606 struct tc_indr_block_dev
*indr_dev
;
608 indr_dev
= tc_indr_block_dev_lookup(dev
);
612 indr_dev
= kzalloc(sizeof(*indr_dev
), GFP_KERNEL
);
616 INIT_LIST_HEAD(&indr_dev
->cb_list
);
618 indr_dev
->block
= tc_dev_ingress_block(dev
);
619 if (rhashtable_insert_fast(&indr_setup_block_ht
, &indr_dev
->ht_node
,
620 tc_indr_setup_block_ht_params
)) {
630 static void tc_indr_block_dev_put(struct tc_indr_block_dev
*indr_dev
)
632 if (--indr_dev
->refcnt
)
635 rhashtable_remove_fast(&indr_setup_block_ht
, &indr_dev
->ht_node
,
636 tc_indr_setup_block_ht_params
);
640 static struct tc_indr_block_cb
*
641 tc_indr_block_cb_lookup(struct tc_indr_block_dev
*indr_dev
,
642 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
644 struct tc_indr_block_cb
*indr_block_cb
;
646 list_for_each_entry(indr_block_cb
, &indr_dev
->cb_list
, list
)
647 if (indr_block_cb
->cb
== cb
&&
648 indr_block_cb
->cb_ident
== cb_ident
)
649 return indr_block_cb
;
653 static struct tc_indr_block_cb
*
654 tc_indr_block_cb_add(struct tc_indr_block_dev
*indr_dev
, void *cb_priv
,
655 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
657 struct tc_indr_block_cb
*indr_block_cb
;
659 indr_block_cb
= tc_indr_block_cb_lookup(indr_dev
, cb
, cb_ident
);
661 return ERR_PTR(-EEXIST
);
663 indr_block_cb
= kzalloc(sizeof(*indr_block_cb
), GFP_KERNEL
);
665 return ERR_PTR(-ENOMEM
);
667 indr_block_cb
->cb_priv
= cb_priv
;
668 indr_block_cb
->cb
= cb
;
669 indr_block_cb
->cb_ident
= cb_ident
;
670 list_add(&indr_block_cb
->list
, &indr_dev
->cb_list
);
672 return indr_block_cb
;
675 static void tc_indr_block_cb_del(struct tc_indr_block_cb
*indr_block_cb
)
677 list_del(&indr_block_cb
->list
);
678 kfree(indr_block_cb
);
681 static void tc_indr_block_ing_cmd(struct tc_indr_block_dev
*indr_dev
,
682 struct tc_indr_block_cb
*indr_block_cb
,
683 enum tc_block_command command
)
685 struct tc_block_offload bo
= {
687 .binder_type
= TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS
,
688 .block
= indr_dev
->block
,
691 if (!indr_dev
->block
)
694 indr_block_cb
->cb(indr_dev
->dev
, indr_block_cb
->cb_priv
, TC_SETUP_BLOCK
,
698 int __tc_indr_block_cb_register(struct net_device
*dev
, void *cb_priv
,
699 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
701 struct tc_indr_block_cb
*indr_block_cb
;
702 struct tc_indr_block_dev
*indr_dev
;
705 indr_dev
= tc_indr_block_dev_get(dev
);
709 indr_block_cb
= tc_indr_block_cb_add(indr_dev
, cb_priv
, cb
, cb_ident
);
710 err
= PTR_ERR_OR_ZERO(indr_block_cb
);
714 tc_indr_block_ing_cmd(indr_dev
, indr_block_cb
, TC_BLOCK_BIND
);
718 tc_indr_block_dev_put(indr_dev
);
721 EXPORT_SYMBOL_GPL(__tc_indr_block_cb_register
);
723 int tc_indr_block_cb_register(struct net_device
*dev
, void *cb_priv
,
724 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
729 err
= __tc_indr_block_cb_register(dev
, cb_priv
, cb
, cb_ident
);
734 EXPORT_SYMBOL_GPL(tc_indr_block_cb_register
);
736 void __tc_indr_block_cb_unregister(struct net_device
*dev
,
737 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
739 struct tc_indr_block_cb
*indr_block_cb
;
740 struct tc_indr_block_dev
*indr_dev
;
742 indr_dev
= tc_indr_block_dev_lookup(dev
);
746 indr_block_cb
= tc_indr_block_cb_lookup(indr_dev
, cb
, cb_ident
);
750 /* Send unbind message if required to free any block cbs. */
751 tc_indr_block_ing_cmd(indr_dev
, indr_block_cb
, TC_BLOCK_UNBIND
);
752 tc_indr_block_cb_del(indr_block_cb
);
753 tc_indr_block_dev_put(indr_dev
);
755 EXPORT_SYMBOL_GPL(__tc_indr_block_cb_unregister
);
757 void tc_indr_block_cb_unregister(struct net_device
*dev
,
758 tc_indr_block_bind_cb_t
*cb
, void *cb_ident
)
761 __tc_indr_block_cb_unregister(dev
, cb
, cb_ident
);
764 EXPORT_SYMBOL_GPL(tc_indr_block_cb_unregister
);
766 static void tc_indr_block_call(struct tcf_block
*block
, struct net_device
*dev
,
767 struct tcf_block_ext_info
*ei
,
768 enum tc_block_command command
,
769 struct netlink_ext_ack
*extack
)
771 struct tc_indr_block_cb
*indr_block_cb
;
772 struct tc_indr_block_dev
*indr_dev
;
773 struct tc_block_offload bo
= {
775 .binder_type
= ei
->binder_type
,
780 indr_dev
= tc_indr_block_dev_lookup(dev
);
784 indr_dev
->block
= command
== TC_BLOCK_BIND
? block
: NULL
;
786 list_for_each_entry(indr_block_cb
, &indr_dev
->cb_list
, list
)
787 indr_block_cb
->cb(dev
, indr_block_cb
->cb_priv
, TC_SETUP_BLOCK
,
791 static bool tcf_block_offload_in_use(struct tcf_block
*block
)
793 return block
->offloadcnt
;
796 static int tcf_block_offload_cmd(struct tcf_block
*block
,
797 struct net_device
*dev
,
798 struct tcf_block_ext_info
*ei
,
799 enum tc_block_command command
,
800 struct netlink_ext_ack
*extack
)
802 struct tc_block_offload bo
= {};
804 bo
.command
= command
;
805 bo
.binder_type
= ei
->binder_type
;
808 return dev
->netdev_ops
->ndo_setup_tc(dev
, TC_SETUP_BLOCK
, &bo
);
811 static int tcf_block_offload_bind(struct tcf_block
*block
, struct Qdisc
*q
,
812 struct tcf_block_ext_info
*ei
,
813 struct netlink_ext_ack
*extack
)
815 struct net_device
*dev
= q
->dev_queue
->dev
;
818 if (!dev
->netdev_ops
->ndo_setup_tc
)
819 goto no_offload_dev_inc
;
821 /* If tc offload feature is disabled and the block we try to bind
822 * to already has some offloaded filters, forbid to bind.
824 if (!tc_can_offload(dev
) && tcf_block_offload_in_use(block
)) {
825 NL_SET_ERR_MSG(extack
, "Bind to offloaded block failed as dev has offload disabled");
829 err
= tcf_block_offload_cmd(block
, dev
, ei
, TC_BLOCK_BIND
, extack
);
830 if (err
== -EOPNOTSUPP
)
831 goto no_offload_dev_inc
;
835 tc_indr_block_call(block
, dev
, ei
, TC_BLOCK_BIND
, extack
);
839 if (tcf_block_offload_in_use(block
))
841 block
->nooffloaddevcnt
++;
842 tc_indr_block_call(block
, dev
, ei
, TC_BLOCK_BIND
, extack
);
846 static void tcf_block_offload_unbind(struct tcf_block
*block
, struct Qdisc
*q
,
847 struct tcf_block_ext_info
*ei
)
849 struct net_device
*dev
= q
->dev_queue
->dev
;
852 tc_indr_block_call(block
, dev
, ei
, TC_BLOCK_UNBIND
, NULL
);
854 if (!dev
->netdev_ops
->ndo_setup_tc
)
855 goto no_offload_dev_dec
;
856 err
= tcf_block_offload_cmd(block
, dev
, ei
, TC_BLOCK_UNBIND
, NULL
);
857 if (err
== -EOPNOTSUPP
)
858 goto no_offload_dev_dec
;
862 WARN_ON(block
->nooffloaddevcnt
-- == 0);
866 tcf_chain0_head_change_cb_add(struct tcf_block
*block
,
867 struct tcf_block_ext_info
*ei
,
868 struct netlink_ext_ack
*extack
)
870 struct tcf_filter_chain_list_item
*item
;
871 struct tcf_chain
*chain0
;
873 item
= kmalloc(sizeof(*item
), GFP_KERNEL
);
875 NL_SET_ERR_MSG(extack
, "Memory allocation for head change callback item failed");
878 item
->chain_head_change
= ei
->chain_head_change
;
879 item
->chain_head_change_priv
= ei
->chain_head_change_priv
;
881 mutex_lock(&block
->lock
);
882 chain0
= block
->chain0
.chain
;
884 tcf_chain_hold(chain0
);
886 list_add(&item
->list
, &block
->chain0
.filter_chain_list
);
887 mutex_unlock(&block
->lock
);
890 struct tcf_proto
*tp_head
;
892 mutex_lock(&chain0
->filter_chain_lock
);
894 tp_head
= tcf_chain_dereference(chain0
->filter_chain
, chain0
);
896 tcf_chain_head_change_item(item
, tp_head
);
898 mutex_lock(&block
->lock
);
899 list_add(&item
->list
, &block
->chain0
.filter_chain_list
);
900 mutex_unlock(&block
->lock
);
902 mutex_unlock(&chain0
->filter_chain_lock
);
903 tcf_chain_put(chain0
);
910 tcf_chain0_head_change_cb_del(struct tcf_block
*block
,
911 struct tcf_block_ext_info
*ei
)
913 struct tcf_filter_chain_list_item
*item
;
915 mutex_lock(&block
->lock
);
916 list_for_each_entry(item
, &block
->chain0
.filter_chain_list
, list
) {
917 if ((!ei
->chain_head_change
&& !ei
->chain_head_change_priv
) ||
918 (item
->chain_head_change
== ei
->chain_head_change
&&
919 item
->chain_head_change_priv
== ei
->chain_head_change_priv
)) {
920 if (block
->chain0
.chain
)
921 tcf_chain_head_change_item(item
, NULL
);
922 list_del(&item
->list
);
923 mutex_unlock(&block
->lock
);
929 mutex_unlock(&block
->lock
);
934 spinlock_t idr_lock
; /* Protects idr */
938 static unsigned int tcf_net_id
;
940 static int tcf_block_insert(struct tcf_block
*block
, struct net
*net
,
941 struct netlink_ext_ack
*extack
)
943 struct tcf_net
*tn
= net_generic(net
, tcf_net_id
);
946 idr_preload(GFP_KERNEL
);
947 spin_lock(&tn
->idr_lock
);
948 err
= idr_alloc_u32(&tn
->idr
, block
, &block
->index
, block
->index
,
950 spin_unlock(&tn
->idr_lock
);
956 static void tcf_block_remove(struct tcf_block
*block
, struct net
*net
)
958 struct tcf_net
*tn
= net_generic(net
, tcf_net_id
);
960 spin_lock(&tn
->idr_lock
);
961 idr_remove(&tn
->idr
, block
->index
);
962 spin_unlock(&tn
->idr_lock
);
965 static struct tcf_block
*tcf_block_create(struct net
*net
, struct Qdisc
*q
,
967 struct netlink_ext_ack
*extack
)
969 struct tcf_block
*block
;
971 block
= kzalloc(sizeof(*block
), GFP_KERNEL
);
973 NL_SET_ERR_MSG(extack
, "Memory allocation for block failed");
974 return ERR_PTR(-ENOMEM
);
976 mutex_init(&block
->lock
);
977 INIT_LIST_HEAD(&block
->chain_list
);
978 INIT_LIST_HEAD(&block
->cb_list
);
979 INIT_LIST_HEAD(&block
->owner_list
);
980 INIT_LIST_HEAD(&block
->chain0
.filter_chain_list
);
982 refcount_set(&block
->refcnt
, 1);
984 block
->index
= block_index
;
986 /* Don't store q pointer for blocks which are shared */
987 if (!tcf_block_shared(block
))
992 static struct tcf_block
*tcf_block_lookup(struct net
*net
, u32 block_index
)
994 struct tcf_net
*tn
= net_generic(net
, tcf_net_id
);
996 return idr_find(&tn
->idr
, block_index
);
999 static struct tcf_block
*tcf_block_refcnt_get(struct net
*net
, u32 block_index
)
1001 struct tcf_block
*block
;
1004 block
= tcf_block_lookup(net
, block_index
);
1005 if (block
&& !refcount_inc_not_zero(&block
->refcnt
))
1012 static struct tcf_chain
*
1013 __tcf_get_next_chain(struct tcf_block
*block
, struct tcf_chain
*chain
)
1015 mutex_lock(&block
->lock
);
1017 chain
= list_is_last(&chain
->list
, &block
->chain_list
) ?
1018 NULL
: list_next_entry(chain
, list
);
1020 chain
= list_first_entry_or_null(&block
->chain_list
,
1021 struct tcf_chain
, list
);
1023 /* skip all action-only chains */
1024 while (chain
&& tcf_chain_held_by_acts_only(chain
))
1025 chain
= list_is_last(&chain
->list
, &block
->chain_list
) ?
1026 NULL
: list_next_entry(chain
, list
);
1029 tcf_chain_hold(chain
);
1030 mutex_unlock(&block
->lock
);
1035 /* Function to be used by all clients that want to iterate over all chains on
1036 * block. It properly obtains block->lock and takes reference to chain before
1037 * returning it. Users of this function must be tolerant to concurrent chain
1038 * insertion/deletion or ensure that no concurrent chain modification is
1039 * possible. Note that all netlink dump callbacks cannot guarantee to provide
1040 * consistent dump because rtnl lock is released each time skb is filled with
1041 * data and sent to user-space.
1045 tcf_get_next_chain(struct tcf_block
*block
, struct tcf_chain
*chain
)
1047 struct tcf_chain
*chain_next
= __tcf_get_next_chain(block
, chain
);
1050 tcf_chain_put(chain
);
1054 EXPORT_SYMBOL(tcf_get_next_chain
);
1056 static struct tcf_proto
*
1057 __tcf_get_next_proto(struct tcf_chain
*chain
, struct tcf_proto
*tp
)
1062 mutex_lock(&chain
->filter_chain_lock
);
1065 tp
= tcf_chain_dereference(chain
->filter_chain
, chain
);
1066 } else if (tcf_proto_is_deleting(tp
)) {
1067 /* 'deleting' flag is set and chain->filter_chain_lock was
1068 * unlocked, which means next pointer could be invalid. Restart
1071 prio
= tp
->prio
+ 1;
1072 tp
= tcf_chain_dereference(chain
->filter_chain
, chain
);
1074 for (; tp
; tp
= tcf_chain_dereference(tp
->next
, chain
))
1075 if (!tp
->deleting
&& tp
->prio
>= prio
)
1078 tp
= tcf_chain_dereference(tp
->next
, chain
);
1084 mutex_unlock(&chain
->filter_chain_lock
);
1089 /* Function to be used by all clients that want to iterate over all tp's on
1090 * chain. Users of this function must be tolerant to concurrent tp
1091 * insertion/deletion or ensure that no concurrent chain modification is
1092 * possible. Note that all netlink dump callbacks cannot guarantee to provide
1093 * consistent dump because rtnl lock is released each time skb is filled with
1094 * data and sent to user-space.
1098 tcf_get_next_proto(struct tcf_chain
*chain
, struct tcf_proto
*tp
,
1101 struct tcf_proto
*tp_next
= __tcf_get_next_proto(chain
, tp
);
1104 tcf_proto_put(tp
, rtnl_held
, NULL
);
1108 EXPORT_SYMBOL(tcf_get_next_proto
);
1110 static void tcf_block_flush_all_chains(struct tcf_block
*block
, bool rtnl_held
)
1112 struct tcf_chain
*chain
;
1114 /* Last reference to block. At this point chains cannot be added or
1115 * removed concurrently.
1117 for (chain
= tcf_get_next_chain(block
, NULL
);
1119 chain
= tcf_get_next_chain(block
, chain
)) {
1120 tcf_chain_put_explicitly_created(chain
);
1121 tcf_chain_flush(chain
, rtnl_held
);
1125 /* Lookup Qdisc and increments its reference counter.
1126 * Set parent, if necessary.
1129 static int __tcf_qdisc_find(struct net
*net
, struct Qdisc
**q
,
1130 u32
*parent
, int ifindex
, bool rtnl_held
,
1131 struct netlink_ext_ack
*extack
)
1133 const struct Qdisc_class_ops
*cops
;
1134 struct net_device
*dev
;
1137 if (ifindex
== TCM_IFINDEX_MAGIC_BLOCK
)
1143 dev
= dev_get_by_index_rcu(net
, ifindex
);
1152 *parent
= (*q
)->handle
;
1154 *q
= qdisc_lookup_rcu(dev
, TC_H_MAJ(*parent
));
1156 NL_SET_ERR_MSG(extack
, "Parent Qdisc doesn't exists");
1162 *q
= qdisc_refcount_inc_nz(*q
);
1164 NL_SET_ERR_MSG(extack
, "Parent Qdisc doesn't exists");
1169 /* Is it classful? */
1170 cops
= (*q
)->ops
->cl_ops
;
1172 NL_SET_ERR_MSG(extack
, "Qdisc not classful");
1177 if (!cops
->tcf_block
) {
1178 NL_SET_ERR_MSG(extack
, "Class doesn't support blocks");
1184 /* At this point we know that qdisc is not noop_qdisc,
1185 * which means that qdisc holds a reference to net_device
1186 * and we hold a reference to qdisc, so it is safe to release
1198 qdisc_put_unlocked(*q
);
1204 static int __tcf_qdisc_cl_find(struct Qdisc
*q
, u32 parent
, unsigned long *cl
,
1205 int ifindex
, struct netlink_ext_ack
*extack
)
1207 if (ifindex
== TCM_IFINDEX_MAGIC_BLOCK
)
1210 /* Do we search for filter, attached to class? */
1211 if (TC_H_MIN(parent
)) {
1212 const struct Qdisc_class_ops
*cops
= q
->ops
->cl_ops
;
1214 *cl
= cops
->find(q
, parent
);
1216 NL_SET_ERR_MSG(extack
, "Specified class doesn't exist");
1224 static struct tcf_block
*__tcf_block_find(struct net
*net
, struct Qdisc
*q
,
1225 unsigned long cl
, int ifindex
,
1227 struct netlink_ext_ack
*extack
)
1229 struct tcf_block
*block
;
1231 if (ifindex
== TCM_IFINDEX_MAGIC_BLOCK
) {
1232 block
= tcf_block_refcnt_get(net
, block_index
);
1234 NL_SET_ERR_MSG(extack
, "Block of given index was not found");
1235 return ERR_PTR(-EINVAL
);
1238 const struct Qdisc_class_ops
*cops
= q
->ops
->cl_ops
;
1240 block
= cops
->tcf_block(q
, cl
, extack
);
1242 return ERR_PTR(-EINVAL
);
1244 if (tcf_block_shared(block
)) {
1245 NL_SET_ERR_MSG(extack
, "This filter block is shared. Please use the block index to manipulate the filters");
1246 return ERR_PTR(-EOPNOTSUPP
);
1249 /* Always take reference to block in order to support execution
1250 * of rules update path of cls API without rtnl lock. Caller
1251 * must release block when it is finished using it. 'if' block
1252 * of this conditional obtain reference to block by calling
1253 * tcf_block_refcnt_get().
1255 refcount_inc(&block
->refcnt
);
1261 static void __tcf_block_put(struct tcf_block
*block
, struct Qdisc
*q
,
1262 struct tcf_block_ext_info
*ei
, bool rtnl_held
)
1264 if (refcount_dec_and_mutex_lock(&block
->refcnt
, &block
->lock
)) {
1265 /* Flushing/putting all chains will cause the block to be
1266 * deallocated when last chain is freed. However, if chain_list
1267 * is empty, block has to be manually deallocated. After block
1268 * reference counter reached 0, it is no longer possible to
1269 * increment it or add new chains to block.
1271 bool free_block
= list_empty(&block
->chain_list
);
1273 mutex_unlock(&block
->lock
);
1274 if (tcf_block_shared(block
))
1275 tcf_block_remove(block
, block
->net
);
1278 tcf_block_offload_unbind(block
, q
, ei
);
1281 tcf_block_destroy(block
);
1283 tcf_block_flush_all_chains(block
, rtnl_held
);
1285 tcf_block_offload_unbind(block
, q
, ei
);
1289 static void tcf_block_refcnt_put(struct tcf_block
*block
, bool rtnl_held
)
1291 __tcf_block_put(block
, NULL
, NULL
, rtnl_held
);
1295 * Set q, parent, cl when appropriate.
1298 static struct tcf_block
*tcf_block_find(struct net
*net
, struct Qdisc
**q
,
1299 u32
*parent
, unsigned long *cl
,
1300 int ifindex
, u32 block_index
,
1301 struct netlink_ext_ack
*extack
)
1303 struct tcf_block
*block
;
1308 err
= __tcf_qdisc_find(net
, q
, parent
, ifindex
, true, extack
);
1312 err
= __tcf_qdisc_cl_find(*q
, *parent
, cl
, ifindex
, extack
);
1316 block
= __tcf_block_find(net
, *q
, *cl
, ifindex
, block_index
, extack
);
1317 if (IS_ERR(block
)) {
1318 err
= PTR_ERR(block
);
1329 return ERR_PTR(err
);
1332 static void tcf_block_release(struct Qdisc
*q
, struct tcf_block
*block
,
1335 if (!IS_ERR_OR_NULL(block
))
1336 tcf_block_refcnt_put(block
, rtnl_held
);
1342 qdisc_put_unlocked(q
);
1346 struct tcf_block_owner_item
{
1347 struct list_head list
;
1349 enum tcf_block_binder_type binder_type
;
1353 tcf_block_owner_netif_keep_dst(struct tcf_block
*block
,
1355 enum tcf_block_binder_type binder_type
)
1357 if (block
->keep_dst
&&
1358 binder_type
!= TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS
&&
1359 binder_type
!= TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS
)
1360 netif_keep_dst(qdisc_dev(q
));
1363 void tcf_block_netif_keep_dst(struct tcf_block
*block
)
1365 struct tcf_block_owner_item
*item
;
1367 block
->keep_dst
= true;
1368 list_for_each_entry(item
, &block
->owner_list
, list
)
1369 tcf_block_owner_netif_keep_dst(block
, item
->q
,
1372 EXPORT_SYMBOL(tcf_block_netif_keep_dst
);
1374 static int tcf_block_owner_add(struct tcf_block
*block
,
1376 enum tcf_block_binder_type binder_type
)
1378 struct tcf_block_owner_item
*item
;
1380 item
= kmalloc(sizeof(*item
), GFP_KERNEL
);
1384 item
->binder_type
= binder_type
;
1385 list_add(&item
->list
, &block
->owner_list
);
1389 static void tcf_block_owner_del(struct tcf_block
*block
,
1391 enum tcf_block_binder_type binder_type
)
1393 struct tcf_block_owner_item
*item
;
1395 list_for_each_entry(item
, &block
->owner_list
, list
) {
1396 if (item
->q
== q
&& item
->binder_type
== binder_type
) {
1397 list_del(&item
->list
);
1405 int tcf_block_get_ext(struct tcf_block
**p_block
, struct Qdisc
*q
,
1406 struct tcf_block_ext_info
*ei
,
1407 struct netlink_ext_ack
*extack
)
1409 struct net
*net
= qdisc_net(q
);
1410 struct tcf_block
*block
= NULL
;
1413 if (ei
->block_index
)
1414 /* block_index not 0 means the shared block is requested */
1415 block
= tcf_block_refcnt_get(net
, ei
->block_index
);
1418 block
= tcf_block_create(net
, q
, ei
->block_index
, extack
);
1420 return PTR_ERR(block
);
1421 if (tcf_block_shared(block
)) {
1422 err
= tcf_block_insert(block
, net
, extack
);
1424 goto err_block_insert
;
1428 err
= tcf_block_owner_add(block
, q
, ei
->binder_type
);
1430 goto err_block_owner_add
;
1432 tcf_block_owner_netif_keep_dst(block
, q
, ei
->binder_type
);
1434 err
= tcf_chain0_head_change_cb_add(block
, ei
, extack
);
1436 goto err_chain0_head_change_cb_add
;
1438 err
= tcf_block_offload_bind(block
, q
, ei
, extack
);
1440 goto err_block_offload_bind
;
1445 err_block_offload_bind
:
1446 tcf_chain0_head_change_cb_del(block
, ei
);
1447 err_chain0_head_change_cb_add
:
1448 tcf_block_owner_del(block
, q
, ei
->binder_type
);
1449 err_block_owner_add
:
1451 tcf_block_refcnt_put(block
, true);
1454 EXPORT_SYMBOL(tcf_block_get_ext
);
1456 static void tcf_chain_head_change_dflt(struct tcf_proto
*tp_head
, void *priv
)
1458 struct tcf_proto __rcu
**p_filter_chain
= priv
;
1460 rcu_assign_pointer(*p_filter_chain
, tp_head
);
1463 int tcf_block_get(struct tcf_block
**p_block
,
1464 struct tcf_proto __rcu
**p_filter_chain
, struct Qdisc
*q
,
1465 struct netlink_ext_ack
*extack
)
1467 struct tcf_block_ext_info ei
= {
1468 .chain_head_change
= tcf_chain_head_change_dflt
,
1469 .chain_head_change_priv
= p_filter_chain
,
1472 WARN_ON(!p_filter_chain
);
1473 return tcf_block_get_ext(p_block
, q
, &ei
, extack
);
1475 EXPORT_SYMBOL(tcf_block_get
);
1477 /* XXX: Standalone actions are not allowed to jump to any chain, and bound
1478 * actions should be all removed after flushing.
1480 void tcf_block_put_ext(struct tcf_block
*block
, struct Qdisc
*q
,
1481 struct tcf_block_ext_info
*ei
)
1485 tcf_chain0_head_change_cb_del(block
, ei
);
1486 tcf_block_owner_del(block
, q
, ei
->binder_type
);
1488 __tcf_block_put(block
, q
, ei
, true);
1490 EXPORT_SYMBOL(tcf_block_put_ext
);
1492 void tcf_block_put(struct tcf_block
*block
)
1494 struct tcf_block_ext_info ei
= {0, };
1498 tcf_block_put_ext(block
, block
->q
, &ei
);
1501 EXPORT_SYMBOL(tcf_block_put
);
1503 struct tcf_block_cb
{
1504 struct list_head list
;
1508 unsigned int refcnt
;
1511 void *tcf_block_cb_priv(struct tcf_block_cb
*block_cb
)
1513 return block_cb
->cb_priv
;
1515 EXPORT_SYMBOL(tcf_block_cb_priv
);
1517 struct tcf_block_cb
*tcf_block_cb_lookup(struct tcf_block
*block
,
1518 tc_setup_cb_t
*cb
, void *cb_ident
)
1519 { struct tcf_block_cb
*block_cb
;
1521 list_for_each_entry(block_cb
, &block
->cb_list
, list
)
1522 if (block_cb
->cb
== cb
&& block_cb
->cb_ident
== cb_ident
)
1526 EXPORT_SYMBOL(tcf_block_cb_lookup
);
1528 void tcf_block_cb_incref(struct tcf_block_cb
*block_cb
)
1532 EXPORT_SYMBOL(tcf_block_cb_incref
);
1534 unsigned int tcf_block_cb_decref(struct tcf_block_cb
*block_cb
)
1536 return --block_cb
->refcnt
;
1538 EXPORT_SYMBOL(tcf_block_cb_decref
);
1541 tcf_block_playback_offloads(struct tcf_block
*block
, tc_setup_cb_t
*cb
,
1542 void *cb_priv
, bool add
, bool offload_in_use
,
1543 struct netlink_ext_ack
*extack
)
1545 struct tcf_chain
*chain
, *chain_prev
;
1546 struct tcf_proto
*tp
, *tp_prev
;
1549 for (chain
= __tcf_get_next_chain(block
, NULL
);
1552 chain
= __tcf_get_next_chain(block
, chain
),
1553 tcf_chain_put(chain_prev
)) {
1554 for (tp
= __tcf_get_next_proto(chain
, NULL
); tp
;
1556 tp
= __tcf_get_next_proto(chain
, tp
),
1557 tcf_proto_put(tp_prev
, true, NULL
)) {
1558 if (tp
->ops
->reoffload
) {
1559 err
= tp
->ops
->reoffload(tp
, add
, cb
, cb_priv
,
1562 goto err_playback_remove
;
1563 } else if (add
&& offload_in_use
) {
1565 NL_SET_ERR_MSG(extack
, "Filter HW offload failed - classifier without re-offloading support");
1566 goto err_playback_remove
;
1573 err_playback_remove
:
1574 tcf_proto_put(tp
, true, NULL
);
1575 tcf_chain_put(chain
);
1576 tcf_block_playback_offloads(block
, cb
, cb_priv
, false, offload_in_use
,
1581 struct tcf_block_cb
*__tcf_block_cb_register(struct tcf_block
*block
,
1582 tc_setup_cb_t
*cb
, void *cb_ident
,
1584 struct netlink_ext_ack
*extack
)
1586 struct tcf_block_cb
*block_cb
;
1589 /* Replay any already present rules */
1590 err
= tcf_block_playback_offloads(block
, cb
, cb_priv
, true,
1591 tcf_block_offload_in_use(block
),
1594 return ERR_PTR(err
);
1596 block_cb
= kzalloc(sizeof(*block_cb
), GFP_KERNEL
);
1598 return ERR_PTR(-ENOMEM
);
1600 block_cb
->cb_ident
= cb_ident
;
1601 block_cb
->cb_priv
= cb_priv
;
1602 list_add(&block_cb
->list
, &block
->cb_list
);
1605 EXPORT_SYMBOL(__tcf_block_cb_register
);
1607 int tcf_block_cb_register(struct tcf_block
*block
,
1608 tc_setup_cb_t
*cb
, void *cb_ident
,
1609 void *cb_priv
, struct netlink_ext_ack
*extack
)
1611 struct tcf_block_cb
*block_cb
;
1613 block_cb
= __tcf_block_cb_register(block
, cb
, cb_ident
, cb_priv
,
1615 return PTR_ERR_OR_ZERO(block_cb
);
1617 EXPORT_SYMBOL(tcf_block_cb_register
);
1619 void __tcf_block_cb_unregister(struct tcf_block
*block
,
1620 struct tcf_block_cb
*block_cb
)
1622 tcf_block_playback_offloads(block
, block_cb
->cb
, block_cb
->cb_priv
,
1623 false, tcf_block_offload_in_use(block
),
1625 list_del(&block_cb
->list
);
1628 EXPORT_SYMBOL(__tcf_block_cb_unregister
);
1630 void tcf_block_cb_unregister(struct tcf_block
*block
,
1631 tc_setup_cb_t
*cb
, void *cb_ident
)
1633 struct tcf_block_cb
*block_cb
;
1635 block_cb
= tcf_block_cb_lookup(block
, cb
, cb_ident
);
1638 __tcf_block_cb_unregister(block
, block_cb
);
1640 EXPORT_SYMBOL(tcf_block_cb_unregister
);
1642 /* Main classifier routine: scans classifier chain attached
1643 * to this qdisc, (optionally) tests for protocol and asks
1644 * specific classifiers.
1646 int tcf_classify(struct sk_buff
*skb
, const struct tcf_proto
*tp
,
1647 struct tcf_result
*res
, bool compat_mode
)
1649 #ifdef CONFIG_NET_CLS_ACT
1650 const int max_reclassify_loop
= 4;
1651 const struct tcf_proto
*orig_tp
= tp
;
1652 const struct tcf_proto
*first_tp
;
1657 for (; tp
; tp
= rcu_dereference_bh(tp
->next
)) {
1658 __be16 protocol
= tc_skb_protocol(skb
);
1661 if (tp
->protocol
!= protocol
&&
1662 tp
->protocol
!= htons(ETH_P_ALL
))
1665 err
= tp
->classify(skb
, tp
, res
);
1666 #ifdef CONFIG_NET_CLS_ACT
1667 if (unlikely(err
== TC_ACT_RECLASSIFY
&& !compat_mode
)) {
1670 } else if (unlikely(TC_ACT_EXT_CMP(err
, TC_ACT_GOTO_CHAIN
))) {
1671 first_tp
= res
->goto_tp
;
1679 return TC_ACT_UNSPEC
; /* signal: continue lookup */
1680 #ifdef CONFIG_NET_CLS_ACT
1682 if (unlikely(limit
++ >= max_reclassify_loop
)) {
1683 net_notice_ratelimited("%u: reclassify loop, rule prio %u, protocol %02x\n",
1684 tp
->chain
->block
->index
,
1686 ntohs(tp
->protocol
));
1694 EXPORT_SYMBOL(tcf_classify
);
1696 struct tcf_chain_info
{
1697 struct tcf_proto __rcu
**pprev
;
1698 struct tcf_proto __rcu
*next
;
1701 static struct tcf_proto
*tcf_chain_tp_prev(struct tcf_chain
*chain
,
1702 struct tcf_chain_info
*chain_info
)
1704 return tcf_chain_dereference(*chain_info
->pprev
, chain
);
1707 static int tcf_chain_tp_insert(struct tcf_chain
*chain
,
1708 struct tcf_chain_info
*chain_info
,
1709 struct tcf_proto
*tp
)
1711 if (chain
->flushing
)
1714 if (*chain_info
->pprev
== chain
->filter_chain
)
1715 tcf_chain0_head_change(chain
, tp
);
1717 RCU_INIT_POINTER(tp
->next
, tcf_chain_tp_prev(chain
, chain_info
));
1718 rcu_assign_pointer(*chain_info
->pprev
, tp
);
1723 static void tcf_chain_tp_remove(struct tcf_chain
*chain
,
1724 struct tcf_chain_info
*chain_info
,
1725 struct tcf_proto
*tp
)
1727 struct tcf_proto
*next
= tcf_chain_dereference(chain_info
->next
, chain
);
1729 tcf_proto_mark_delete(tp
);
1730 if (tp
== chain
->filter_chain
)
1731 tcf_chain0_head_change(chain
, next
);
1732 RCU_INIT_POINTER(*chain_info
->pprev
, next
);
1735 static struct tcf_proto
*tcf_chain_tp_find(struct tcf_chain
*chain
,
1736 struct tcf_chain_info
*chain_info
,
1737 u32 protocol
, u32 prio
,
1738 bool prio_allocate
);
1740 /* Try to insert new proto.
1741 * If proto with specified priority already exists, free new proto
1742 * and return existing one.
1745 static struct tcf_proto
*tcf_chain_tp_insert_unique(struct tcf_chain
*chain
,
1746 struct tcf_proto
*tp_new
,
1747 u32 protocol
, u32 prio
,
1750 struct tcf_chain_info chain_info
;
1751 struct tcf_proto
*tp
;
1754 mutex_lock(&chain
->filter_chain_lock
);
1756 tp
= tcf_chain_tp_find(chain
, &chain_info
,
1757 protocol
, prio
, false);
1759 err
= tcf_chain_tp_insert(chain
, &chain_info
, tp_new
);
1760 mutex_unlock(&chain
->filter_chain_lock
);
1763 tcf_proto_destroy(tp_new
, rtnl_held
, NULL
);
1766 tcf_proto_destroy(tp_new
, rtnl_held
, NULL
);
1767 tp_new
= ERR_PTR(err
);
1773 static void tcf_chain_tp_delete_empty(struct tcf_chain
*chain
,
1774 struct tcf_proto
*tp
, bool rtnl_held
,
1775 struct netlink_ext_ack
*extack
)
1777 struct tcf_chain_info chain_info
;
1778 struct tcf_proto
*tp_iter
;
1779 struct tcf_proto
**pprev
;
1780 struct tcf_proto
*next
;
1782 mutex_lock(&chain
->filter_chain_lock
);
1784 /* Atomically find and remove tp from chain. */
1785 for (pprev
= &chain
->filter_chain
;
1786 (tp_iter
= tcf_chain_dereference(*pprev
, chain
));
1787 pprev
= &tp_iter
->next
) {
1788 if (tp_iter
== tp
) {
1789 chain_info
.pprev
= pprev
;
1790 chain_info
.next
= tp_iter
->next
;
1791 WARN_ON(tp_iter
->deleting
);
1795 /* Verify that tp still exists and no new filters were inserted
1797 * Mark tp for deletion if it is empty.
1799 if (!tp_iter
|| !tcf_proto_check_delete(tp
, rtnl_held
)) {
1800 mutex_unlock(&chain
->filter_chain_lock
);
1804 next
= tcf_chain_dereference(chain_info
.next
, chain
);
1805 if (tp
== chain
->filter_chain
)
1806 tcf_chain0_head_change(chain
, next
);
1807 RCU_INIT_POINTER(*chain_info
.pprev
, next
);
1808 mutex_unlock(&chain
->filter_chain_lock
);
1810 tcf_proto_put(tp
, rtnl_held
, extack
);
1813 static struct tcf_proto
*tcf_chain_tp_find(struct tcf_chain
*chain
,
1814 struct tcf_chain_info
*chain_info
,
1815 u32 protocol
, u32 prio
,
1818 struct tcf_proto
**pprev
;
1819 struct tcf_proto
*tp
;
1821 /* Check the chain for existence of proto-tcf with this priority */
1822 for (pprev
= &chain
->filter_chain
;
1823 (tp
= tcf_chain_dereference(*pprev
, chain
));
1824 pprev
= &tp
->next
) {
1825 if (tp
->prio
>= prio
) {
1826 if (tp
->prio
== prio
) {
1827 if (prio_allocate
||
1828 (tp
->protocol
!= protocol
&& protocol
))
1829 return ERR_PTR(-EINVAL
);
1836 chain_info
->pprev
= pprev
;
1838 chain_info
->next
= tp
->next
;
1841 chain_info
->next
= NULL
;
1846 static int tcf_fill_node(struct net
*net
, struct sk_buff
*skb
,
1847 struct tcf_proto
*tp
, struct tcf_block
*block
,
1848 struct Qdisc
*q
, u32 parent
, void *fh
,
1849 u32 portid
, u32 seq
, u16 flags
, int event
,
1853 struct nlmsghdr
*nlh
;
1854 unsigned char *b
= skb_tail_pointer(skb
);
1856 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*tcm
), flags
);
1858 goto out_nlmsg_trim
;
1859 tcm
= nlmsg_data(nlh
);
1860 tcm
->tcm_family
= AF_UNSPEC
;
1864 tcm
->tcm_ifindex
= qdisc_dev(q
)->ifindex
;
1865 tcm
->tcm_parent
= parent
;
1867 tcm
->tcm_ifindex
= TCM_IFINDEX_MAGIC_BLOCK
;
1868 tcm
->tcm_block_index
= block
->index
;
1870 tcm
->tcm_info
= TC_H_MAKE(tp
->prio
, tp
->protocol
);
1871 if (nla_put_string(skb
, TCA_KIND
, tp
->ops
->kind
))
1872 goto nla_put_failure
;
1873 if (nla_put_u32(skb
, TCA_CHAIN
, tp
->chain
->index
))
1874 goto nla_put_failure
;
1876 tcm
->tcm_handle
= 0;
1878 if (tp
->ops
->dump
&&
1879 tp
->ops
->dump(net
, tp
, fh
, skb
, tcm
, rtnl_held
) < 0)
1880 goto nla_put_failure
;
1882 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
1891 static int tfilter_notify(struct net
*net
, struct sk_buff
*oskb
,
1892 struct nlmsghdr
*n
, struct tcf_proto
*tp
,
1893 struct tcf_block
*block
, struct Qdisc
*q
,
1894 u32 parent
, void *fh
, int event
, bool unicast
,
1897 struct sk_buff
*skb
;
1898 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
1900 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1904 if (tcf_fill_node(net
, skb
, tp
, block
, q
, parent
, fh
, portid
,
1905 n
->nlmsg_seq
, n
->nlmsg_flags
, event
,
1912 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
1914 return rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
1915 n
->nlmsg_flags
& NLM_F_ECHO
);
1918 static int tfilter_del_notify(struct net
*net
, struct sk_buff
*oskb
,
1919 struct nlmsghdr
*n
, struct tcf_proto
*tp
,
1920 struct tcf_block
*block
, struct Qdisc
*q
,
1921 u32 parent
, void *fh
, bool unicast
, bool *last
,
1922 bool rtnl_held
, struct netlink_ext_ack
*extack
)
1924 struct sk_buff
*skb
;
1925 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
1928 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1932 if (tcf_fill_node(net
, skb
, tp
, block
, q
, parent
, fh
, portid
,
1933 n
->nlmsg_seq
, n
->nlmsg_flags
, RTM_DELTFILTER
,
1935 NL_SET_ERR_MSG(extack
, "Failed to build del event notification");
1940 err
= tp
->ops
->delete(tp
, fh
, last
, rtnl_held
, extack
);
1947 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
1949 err
= rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
,
1950 n
->nlmsg_flags
& NLM_F_ECHO
);
1952 NL_SET_ERR_MSG(extack
, "Failed to send filter delete notification");
1956 static void tfilter_notify_chain(struct net
*net
, struct sk_buff
*oskb
,
1957 struct tcf_block
*block
, struct Qdisc
*q
,
1958 u32 parent
, struct nlmsghdr
*n
,
1959 struct tcf_chain
*chain
, int event
,
1962 struct tcf_proto
*tp
;
1964 for (tp
= tcf_get_next_proto(chain
, NULL
, rtnl_held
);
1965 tp
; tp
= tcf_get_next_proto(chain
, tp
, rtnl_held
))
1966 tfilter_notify(net
, oskb
, n
, tp
, block
,
1967 q
, parent
, NULL
, event
, false, rtnl_held
);
1970 static void tfilter_put(struct tcf_proto
*tp
, void *fh
)
1972 if (tp
->ops
->put
&& fh
)
1973 tp
->ops
->put(tp
, fh
);
1976 static int tc_new_tfilter(struct sk_buff
*skb
, struct nlmsghdr
*n
,
1977 struct netlink_ext_ack
*extack
)
1979 struct net
*net
= sock_net(skb
->sk
);
1980 struct nlattr
*tca
[TCA_MAX
+ 1];
1987 struct Qdisc
*q
= NULL
;
1988 struct tcf_chain_info chain_info
;
1989 struct tcf_chain
*chain
= NULL
;
1990 struct tcf_block
*block
;
1991 struct tcf_proto
*tp
;
1996 bool rtnl_held
= false;
1998 if (!netlink_ns_capable(skb
, net
->user_ns
, CAP_NET_ADMIN
))
2004 err
= nlmsg_parse(n
, sizeof(*t
), tca
, TCA_MAX
, rtm_tca_policy
, extack
);
2009 protocol
= TC_H_MIN(t
->tcm_info
);
2010 prio
= TC_H_MAJ(t
->tcm_info
);
2011 prio_allocate
= false;
2012 parent
= t
->tcm_parent
;
2018 /* If no priority is provided by the user,
2021 if (n
->nlmsg_flags
& NLM_F_CREATE
) {
2022 prio
= TC_H_MAKE(0x80000000U
, 0U);
2023 prio_allocate
= true;
2025 NL_SET_ERR_MSG(extack
, "Invalid filter command with priority of zero");
2030 /* Find head of filter chain. */
2032 err
= __tcf_qdisc_find(net
, &q
, &parent
, t
->tcm_ifindex
, false, extack
);
2036 /* Take rtnl mutex if rtnl_held was set to true on previous iteration,
2037 * block is shared (no qdisc found), qdisc is not unlocked, classifier
2038 * type is not specified, classifier is not unlocked.
2041 (q
&& !(q
->ops
->cl_ops
->flags
& QDISC_CLASS_OPS_DOIT_UNLOCKED
)) ||
2042 !tca
[TCA_KIND
] || !tcf_proto_is_unlocked(nla_data(tca
[TCA_KIND
]))) {
2047 err
= __tcf_qdisc_cl_find(q
, parent
, &cl
, t
->tcm_ifindex
, extack
);
2051 block
= __tcf_block_find(net
, q
, cl
, t
->tcm_ifindex
, t
->tcm_block_index
,
2053 if (IS_ERR(block
)) {
2054 err
= PTR_ERR(block
);
2058 chain_index
= tca
[TCA_CHAIN
] ? nla_get_u32(tca
[TCA_CHAIN
]) : 0;
2059 if (chain_index
> TC_ACT_EXT_VAL_MASK
) {
2060 NL_SET_ERR_MSG(extack
, "Specified chain index exceeds upper limit");
2064 chain
= tcf_chain_get(block
, chain_index
, true);
2066 NL_SET_ERR_MSG(extack
, "Cannot create specified filter chain");
2071 mutex_lock(&chain
->filter_chain_lock
);
2072 tp
= tcf_chain_tp_find(chain
, &chain_info
, protocol
,
2073 prio
, prio_allocate
);
2075 NL_SET_ERR_MSG(extack
, "Filter with specified priority/protocol not found");
2081 struct tcf_proto
*tp_new
= NULL
;
2083 if (chain
->flushing
) {
2088 /* Proto-tcf does not exist, create new one */
2090 if (tca
[TCA_KIND
] == NULL
|| !protocol
) {
2091 NL_SET_ERR_MSG(extack
, "Filter kind and protocol must be specified");
2096 if (!(n
->nlmsg_flags
& NLM_F_CREATE
)) {
2097 NL_SET_ERR_MSG(extack
, "Need both RTM_NEWTFILTER and NLM_F_CREATE to create a new filter");
2103 prio
= tcf_auto_prio(tcf_chain_tp_prev(chain
,
2106 mutex_unlock(&chain
->filter_chain_lock
);
2107 tp_new
= tcf_proto_create(nla_data(tca
[TCA_KIND
]),
2108 protocol
, prio
, chain
, rtnl_held
,
2110 if (IS_ERR(tp_new
)) {
2111 err
= PTR_ERR(tp_new
);
2116 tp
= tcf_chain_tp_insert_unique(chain
, tp_new
, protocol
, prio
,
2123 mutex_unlock(&chain
->filter_chain_lock
);
2126 if (tca
[TCA_KIND
] && nla_strcmp(tca
[TCA_KIND
], tp
->ops
->kind
)) {
2127 NL_SET_ERR_MSG(extack
, "Specified filter kind does not match existing one");
2132 fh
= tp
->ops
->get(tp
, t
->tcm_handle
);
2135 if (!(n
->nlmsg_flags
& NLM_F_CREATE
)) {
2136 NL_SET_ERR_MSG(extack
, "Need both RTM_NEWTFILTER and NLM_F_CREATE to create a new filter");
2140 } else if (n
->nlmsg_flags
& NLM_F_EXCL
) {
2141 tfilter_put(tp
, fh
);
2142 NL_SET_ERR_MSG(extack
, "Filter already exists");
2147 if (chain
->tmplt_ops
&& chain
->tmplt_ops
!= tp
->ops
) {
2148 NL_SET_ERR_MSG(extack
, "Chain template is set to a different filter kind");
2153 err
= tp
->ops
->change(net
, skb
, tp
, cl
, t
->tcm_handle
, tca
, &fh
,
2154 n
->nlmsg_flags
& NLM_F_CREATE
? TCA_ACT_NOREPLACE
: TCA_ACT_REPLACE
,
2157 tfilter_notify(net
, skb
, n
, tp
, block
, q
, parent
, fh
,
2158 RTM_NEWTFILTER
, false, rtnl_held
);
2159 tfilter_put(tp
, fh
);
2163 if (err
&& tp_created
)
2164 tcf_chain_tp_delete_empty(chain
, tp
, rtnl_held
, NULL
);
2167 if (tp
&& !IS_ERR(tp
))
2168 tcf_proto_put(tp
, rtnl_held
, NULL
);
2170 tcf_chain_put(chain
);
2172 tcf_block_release(q
, block
, rtnl_held
);
2177 if (err
== -EAGAIN
) {
2178 /* Take rtnl lock in case EAGAIN is caused by concurrent flush
2182 /* Replay the request. */
2188 mutex_unlock(&chain
->filter_chain_lock
);
2192 static int tc_del_tfilter(struct sk_buff
*skb
, struct nlmsghdr
*n
,
2193 struct netlink_ext_ack
*extack
)
2195 struct net
*net
= sock_net(skb
->sk
);
2196 struct nlattr
*tca
[TCA_MAX
+ 1];
2202 struct Qdisc
*q
= NULL
;
2203 struct tcf_chain_info chain_info
;
2204 struct tcf_chain
*chain
= NULL
;
2205 struct tcf_block
*block
= NULL
;
2206 struct tcf_proto
*tp
= NULL
;
2207 unsigned long cl
= 0;
2210 bool rtnl_held
= false;
2212 if (!netlink_ns_capable(skb
, net
->user_ns
, CAP_NET_ADMIN
))
2215 err
= nlmsg_parse(n
, sizeof(*t
), tca
, TCA_MAX
, rtm_tca_policy
, extack
);
2220 protocol
= TC_H_MIN(t
->tcm_info
);
2221 prio
= TC_H_MAJ(t
->tcm_info
);
2222 parent
= t
->tcm_parent
;
2224 if (prio
== 0 && (protocol
|| t
->tcm_handle
|| tca
[TCA_KIND
])) {
2225 NL_SET_ERR_MSG(extack
, "Cannot flush filters with protocol, handle or kind set");
2229 /* Find head of filter chain. */
2231 err
= __tcf_qdisc_find(net
, &q
, &parent
, t
->tcm_ifindex
, false, extack
);
2235 /* Take rtnl mutex if flushing whole chain, block is shared (no qdisc
2236 * found), qdisc is not unlocked, classifier type is not specified,
2237 * classifier is not unlocked.
2240 (q
&& !(q
->ops
->cl_ops
->flags
& QDISC_CLASS_OPS_DOIT_UNLOCKED
)) ||
2241 !tca
[TCA_KIND
] || !tcf_proto_is_unlocked(nla_data(tca
[TCA_KIND
]))) {
2246 err
= __tcf_qdisc_cl_find(q
, parent
, &cl
, t
->tcm_ifindex
, extack
);
2250 block
= __tcf_block_find(net
, q
, cl
, t
->tcm_ifindex
, t
->tcm_block_index
,
2252 if (IS_ERR(block
)) {
2253 err
= PTR_ERR(block
);
2257 chain_index
= tca
[TCA_CHAIN
] ? nla_get_u32(tca
[TCA_CHAIN
]) : 0;
2258 if (chain_index
> TC_ACT_EXT_VAL_MASK
) {
2259 NL_SET_ERR_MSG(extack
, "Specified chain index exceeds upper limit");
2263 chain
= tcf_chain_get(block
, chain_index
, false);
2265 /* User requested flush on non-existent chain. Nothing to do,
2266 * so just return success.
2272 NL_SET_ERR_MSG(extack
, "Cannot find specified filter chain");
2278 tfilter_notify_chain(net
, skb
, block
, q
, parent
, n
,
2279 chain
, RTM_DELTFILTER
, rtnl_held
);
2280 tcf_chain_flush(chain
, rtnl_held
);
2285 mutex_lock(&chain
->filter_chain_lock
);
2286 tp
= tcf_chain_tp_find(chain
, &chain_info
, protocol
,
2288 if (!tp
|| IS_ERR(tp
)) {
2289 NL_SET_ERR_MSG(extack
, "Filter with specified priority/protocol not found");
2290 err
= tp
? PTR_ERR(tp
) : -ENOENT
;
2292 } else if (tca
[TCA_KIND
] && nla_strcmp(tca
[TCA_KIND
], tp
->ops
->kind
)) {
2293 NL_SET_ERR_MSG(extack
, "Specified filter kind does not match existing one");
2296 } else if (t
->tcm_handle
== 0) {
2297 tcf_chain_tp_remove(chain
, &chain_info
, tp
);
2298 mutex_unlock(&chain
->filter_chain_lock
);
2300 tcf_proto_put(tp
, rtnl_held
, NULL
);
2301 tfilter_notify(net
, skb
, n
, tp
, block
, q
, parent
, fh
,
2302 RTM_DELTFILTER
, false, rtnl_held
);
2306 mutex_unlock(&chain
->filter_chain_lock
);
2308 fh
= tp
->ops
->get(tp
, t
->tcm_handle
);
2311 NL_SET_ERR_MSG(extack
, "Specified filter handle not found");
2316 err
= tfilter_del_notify(net
, skb
, n
, tp
, block
,
2317 q
, parent
, fh
, false, &last
,
2323 tcf_chain_tp_delete_empty(chain
, tp
, rtnl_held
, extack
);
2328 if (tp
&& !IS_ERR(tp
))
2329 tcf_proto_put(tp
, rtnl_held
, NULL
);
2330 tcf_chain_put(chain
);
2332 tcf_block_release(q
, block
, rtnl_held
);
2340 mutex_unlock(&chain
->filter_chain_lock
);
2344 static int tc_get_tfilter(struct sk_buff
*skb
, struct nlmsghdr
*n
,
2345 struct netlink_ext_ack
*extack
)
2347 struct net
*net
= sock_net(skb
->sk
);
2348 struct nlattr
*tca
[TCA_MAX
+ 1];
2354 struct Qdisc
*q
= NULL
;
2355 struct tcf_chain_info chain_info
;
2356 struct tcf_chain
*chain
= NULL
;
2357 struct tcf_block
*block
= NULL
;
2358 struct tcf_proto
*tp
= NULL
;
2359 unsigned long cl
= 0;
2362 bool rtnl_held
= false;
2364 err
= nlmsg_parse(n
, sizeof(*t
), tca
, TCA_MAX
, rtm_tca_policy
, extack
);
2369 protocol
= TC_H_MIN(t
->tcm_info
);
2370 prio
= TC_H_MAJ(t
->tcm_info
);
2371 parent
= t
->tcm_parent
;
2374 NL_SET_ERR_MSG(extack
, "Invalid filter command with priority of zero");
2378 /* Find head of filter chain. */
2380 err
= __tcf_qdisc_find(net
, &q
, &parent
, t
->tcm_ifindex
, false, extack
);
2384 /* Take rtnl mutex if block is shared (no qdisc found), qdisc is not
2385 * unlocked, classifier type is not specified, classifier is not
2388 if ((q
&& !(q
->ops
->cl_ops
->flags
& QDISC_CLASS_OPS_DOIT_UNLOCKED
)) ||
2389 !tca
[TCA_KIND
] || !tcf_proto_is_unlocked(nla_data(tca
[TCA_KIND
]))) {
2394 err
= __tcf_qdisc_cl_find(q
, parent
, &cl
, t
->tcm_ifindex
, extack
);
2398 block
= __tcf_block_find(net
, q
, cl
, t
->tcm_ifindex
, t
->tcm_block_index
,
2400 if (IS_ERR(block
)) {
2401 err
= PTR_ERR(block
);
2405 chain_index
= tca
[TCA_CHAIN
] ? nla_get_u32(tca
[TCA_CHAIN
]) : 0;
2406 if (chain_index
> TC_ACT_EXT_VAL_MASK
) {
2407 NL_SET_ERR_MSG(extack
, "Specified chain index exceeds upper limit");
2411 chain
= tcf_chain_get(block
, chain_index
, false);
2413 NL_SET_ERR_MSG(extack
, "Cannot find specified filter chain");
2418 mutex_lock(&chain
->filter_chain_lock
);
2419 tp
= tcf_chain_tp_find(chain
, &chain_info
, protocol
,
2421 mutex_unlock(&chain
->filter_chain_lock
);
2422 if (!tp
|| IS_ERR(tp
)) {
2423 NL_SET_ERR_MSG(extack
, "Filter with specified priority/protocol not found");
2424 err
= tp
? PTR_ERR(tp
) : -ENOENT
;
2426 } else if (tca
[TCA_KIND
] && nla_strcmp(tca
[TCA_KIND
], tp
->ops
->kind
)) {
2427 NL_SET_ERR_MSG(extack
, "Specified filter kind does not match existing one");
2432 fh
= tp
->ops
->get(tp
, t
->tcm_handle
);
2435 NL_SET_ERR_MSG(extack
, "Specified filter handle not found");
2438 err
= tfilter_notify(net
, skb
, n
, tp
, block
, q
, parent
,
2439 fh
, RTM_NEWTFILTER
, true, rtnl_held
);
2441 NL_SET_ERR_MSG(extack
, "Failed to send filter notify message");
2444 tfilter_put(tp
, fh
);
2447 if (tp
&& !IS_ERR(tp
))
2448 tcf_proto_put(tp
, rtnl_held
, NULL
);
2449 tcf_chain_put(chain
);
2451 tcf_block_release(q
, block
, rtnl_held
);
2459 struct tcf_dump_args
{
2460 struct tcf_walker w
;
2461 struct sk_buff
*skb
;
2462 struct netlink_callback
*cb
;
2463 struct tcf_block
*block
;
2468 static int tcf_node_dump(struct tcf_proto
*tp
, void *n
, struct tcf_walker
*arg
)
2470 struct tcf_dump_args
*a
= (void *)arg
;
2471 struct net
*net
= sock_net(a
->skb
->sk
);
2473 return tcf_fill_node(net
, a
->skb
, tp
, a
->block
, a
->q
, a
->parent
,
2474 n
, NETLINK_CB(a
->cb
->skb
).portid
,
2475 a
->cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
2476 RTM_NEWTFILTER
, true);
2479 static bool tcf_chain_dump(struct tcf_chain
*chain
, struct Qdisc
*q
, u32 parent
,
2480 struct sk_buff
*skb
, struct netlink_callback
*cb
,
2481 long index_start
, long *p_index
)
2483 struct net
*net
= sock_net(skb
->sk
);
2484 struct tcf_block
*block
= chain
->block
;
2485 struct tcmsg
*tcm
= nlmsg_data(cb
->nlh
);
2486 struct tcf_proto
*tp
, *tp_prev
;
2487 struct tcf_dump_args arg
;
2489 for (tp
= __tcf_get_next_proto(chain
, NULL
);
2492 tp
= __tcf_get_next_proto(chain
, tp
),
2493 tcf_proto_put(tp_prev
, true, NULL
),
2495 if (*p_index
< index_start
)
2497 if (TC_H_MAJ(tcm
->tcm_info
) &&
2498 TC_H_MAJ(tcm
->tcm_info
) != tp
->prio
)
2500 if (TC_H_MIN(tcm
->tcm_info
) &&
2501 TC_H_MIN(tcm
->tcm_info
) != tp
->protocol
)
2503 if (*p_index
> index_start
)
2504 memset(&cb
->args
[1], 0,
2505 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
2506 if (cb
->args
[1] == 0) {
2507 if (tcf_fill_node(net
, skb
, tp
, block
, q
, parent
, NULL
,
2508 NETLINK_CB(cb
->skb
).portid
,
2509 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
2510 RTM_NEWTFILTER
, true) <= 0)
2516 arg
.w
.fn
= tcf_node_dump
;
2521 arg
.parent
= parent
;
2523 arg
.w
.skip
= cb
->args
[1] - 1;
2525 arg
.w
.cookie
= cb
->args
[2];
2526 tp
->ops
->walk(tp
, &arg
.w
, true);
2527 cb
->args
[2] = arg
.w
.cookie
;
2528 cb
->args
[1] = arg
.w
.count
+ 1;
2535 tcf_proto_put(tp
, true, NULL
);
2539 /* called with RTNL */
2540 static int tc_dump_tfilter(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2542 struct tcf_chain
*chain
, *chain_prev
;
2543 struct net
*net
= sock_net(skb
->sk
);
2544 struct nlattr
*tca
[TCA_MAX
+ 1];
2545 struct Qdisc
*q
= NULL
;
2546 struct tcf_block
*block
;
2547 struct tcmsg
*tcm
= nlmsg_data(cb
->nlh
);
2553 if (nlmsg_len(cb
->nlh
) < sizeof(*tcm
))
2556 err
= nlmsg_parse(cb
->nlh
, sizeof(*tcm
), tca
, TCA_MAX
, NULL
,
2561 if (tcm
->tcm_ifindex
== TCM_IFINDEX_MAGIC_BLOCK
) {
2562 block
= tcf_block_refcnt_get(net
, tcm
->tcm_block_index
);
2565 /* If we work with block index, q is NULL and parent value
2566 * will never be used in the following code. The check
2567 * in tcf_fill_node prevents it. However, compiler does not
2568 * see that far, so set parent to zero to silence the warning
2569 * about parent being uninitialized.
2573 const struct Qdisc_class_ops
*cops
;
2574 struct net_device
*dev
;
2575 unsigned long cl
= 0;
2577 dev
= __dev_get_by_index(net
, tcm
->tcm_ifindex
);
2581 parent
= tcm
->tcm_parent
;
2586 q
= qdisc_lookup(dev
, TC_H_MAJ(tcm
->tcm_parent
));
2590 cops
= q
->ops
->cl_ops
;
2593 if (!cops
->tcf_block
)
2595 if (TC_H_MIN(tcm
->tcm_parent
)) {
2596 cl
= cops
->find(q
, tcm
->tcm_parent
);
2600 block
= cops
->tcf_block(q
, cl
, NULL
);
2603 if (tcf_block_shared(block
))
2607 index_start
= cb
->args
[0];
2610 for (chain
= __tcf_get_next_chain(block
, NULL
);
2613 chain
= __tcf_get_next_chain(block
, chain
),
2614 tcf_chain_put(chain_prev
)) {
2615 if (tca
[TCA_CHAIN
] &&
2616 nla_get_u32(tca
[TCA_CHAIN
]) != chain
->index
)
2618 if (!tcf_chain_dump(chain
, q
, parent
, skb
, cb
,
2619 index_start
, &index
)) {
2620 tcf_chain_put(chain
);
2626 if (tcm
->tcm_ifindex
== TCM_IFINDEX_MAGIC_BLOCK
)
2627 tcf_block_refcnt_put(block
, true);
2628 cb
->args
[0] = index
;
2631 /* If we did no progress, the error (EMSGSIZE) is real */
2632 if (skb
->len
== 0 && err
)
2637 static int tc_chain_fill_node(const struct tcf_proto_ops
*tmplt_ops
,
2638 void *tmplt_priv
, u32 chain_index
,
2639 struct net
*net
, struct sk_buff
*skb
,
2640 struct tcf_block
*block
,
2641 u32 portid
, u32 seq
, u16 flags
, int event
)
2643 unsigned char *b
= skb_tail_pointer(skb
);
2644 const struct tcf_proto_ops
*ops
;
2645 struct nlmsghdr
*nlh
;
2652 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*tcm
), flags
);
2654 goto out_nlmsg_trim
;
2655 tcm
= nlmsg_data(nlh
);
2656 tcm
->tcm_family
= AF_UNSPEC
;
2659 tcm
->tcm_handle
= 0;
2661 tcm
->tcm_ifindex
= qdisc_dev(block
->q
)->ifindex
;
2662 tcm
->tcm_parent
= block
->q
->handle
;
2664 tcm
->tcm_ifindex
= TCM_IFINDEX_MAGIC_BLOCK
;
2665 tcm
->tcm_block_index
= block
->index
;
2668 if (nla_put_u32(skb
, TCA_CHAIN
, chain_index
))
2669 goto nla_put_failure
;
2672 if (nla_put_string(skb
, TCA_KIND
, ops
->kind
))
2673 goto nla_put_failure
;
2674 if (ops
->tmplt_dump(skb
, net
, priv
) < 0)
2675 goto nla_put_failure
;
2678 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
2687 static int tc_chain_notify(struct tcf_chain
*chain
, struct sk_buff
*oskb
,
2688 u32 seq
, u16 flags
, int event
, bool unicast
)
2690 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
2691 struct tcf_block
*block
= chain
->block
;
2692 struct net
*net
= block
->net
;
2693 struct sk_buff
*skb
;
2695 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
2699 if (tc_chain_fill_node(chain
->tmplt_ops
, chain
->tmplt_priv
,
2700 chain
->index
, net
, skb
, block
, portid
,
2701 seq
, flags
, event
) <= 0) {
2707 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
2709 return rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
, flags
& NLM_F_ECHO
);
2712 static int tc_chain_notify_delete(const struct tcf_proto_ops
*tmplt_ops
,
2713 void *tmplt_priv
, u32 chain_index
,
2714 struct tcf_block
*block
, struct sk_buff
*oskb
,
2715 u32 seq
, u16 flags
, bool unicast
)
2717 u32 portid
= oskb
? NETLINK_CB(oskb
).portid
: 0;
2718 struct net
*net
= block
->net
;
2719 struct sk_buff
*skb
;
2721 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
2725 if (tc_chain_fill_node(tmplt_ops
, tmplt_priv
, chain_index
, net
, skb
,
2726 block
, portid
, seq
, flags
, RTM_DELCHAIN
) <= 0) {
2732 return netlink_unicast(net
->rtnl
, skb
, portid
, MSG_DONTWAIT
);
2734 return rtnetlink_send(skb
, net
, portid
, RTNLGRP_TC
, flags
& NLM_F_ECHO
);
2737 static int tc_chain_tmplt_add(struct tcf_chain
*chain
, struct net
*net
,
2738 struct nlattr
**tca
,
2739 struct netlink_ext_ack
*extack
)
2741 const struct tcf_proto_ops
*ops
;
2744 /* If kind is not set, user did not specify template. */
2748 ops
= tcf_proto_lookup_ops(nla_data(tca
[TCA_KIND
]), true, extack
);
2750 return PTR_ERR(ops
);
2751 if (!ops
->tmplt_create
|| !ops
->tmplt_destroy
|| !ops
->tmplt_dump
) {
2752 NL_SET_ERR_MSG(extack
, "Chain templates are not supported with specified classifier");
2756 tmplt_priv
= ops
->tmplt_create(net
, chain
, tca
, extack
);
2757 if (IS_ERR(tmplt_priv
)) {
2758 module_put(ops
->owner
);
2759 return PTR_ERR(tmplt_priv
);
2761 chain
->tmplt_ops
= ops
;
2762 chain
->tmplt_priv
= tmplt_priv
;
2766 static void tc_chain_tmplt_del(const struct tcf_proto_ops
*tmplt_ops
,
2769 /* If template ops are set, no work to do for us. */
2773 tmplt_ops
->tmplt_destroy(tmplt_priv
);
2774 module_put(tmplt_ops
->owner
);
2777 /* Add/delete/get a chain */
2779 static int tc_ctl_chain(struct sk_buff
*skb
, struct nlmsghdr
*n
,
2780 struct netlink_ext_ack
*extack
)
2782 struct net
*net
= sock_net(skb
->sk
);
2783 struct nlattr
*tca
[TCA_MAX
+ 1];
2787 struct Qdisc
*q
= NULL
;
2788 struct tcf_chain
*chain
= NULL
;
2789 struct tcf_block
*block
;
2793 if (n
->nlmsg_type
!= RTM_GETCHAIN
&&
2794 !netlink_ns_capable(skb
, net
->user_ns
, CAP_NET_ADMIN
))
2798 err
= nlmsg_parse(n
, sizeof(*t
), tca
, TCA_MAX
, rtm_tca_policy
, extack
);
2803 parent
= t
->tcm_parent
;
2806 block
= tcf_block_find(net
, &q
, &parent
, &cl
,
2807 t
->tcm_ifindex
, t
->tcm_block_index
, extack
);
2809 return PTR_ERR(block
);
2811 chain_index
= tca
[TCA_CHAIN
] ? nla_get_u32(tca
[TCA_CHAIN
]) : 0;
2812 if (chain_index
> TC_ACT_EXT_VAL_MASK
) {
2813 NL_SET_ERR_MSG(extack
, "Specified chain index exceeds upper limit");
2818 mutex_lock(&block
->lock
);
2819 chain
= tcf_chain_lookup(block
, chain_index
);
2820 if (n
->nlmsg_type
== RTM_NEWCHAIN
) {
2822 if (tcf_chain_held_by_acts_only(chain
)) {
2823 /* The chain exists only because there is
2824 * some action referencing it.
2826 tcf_chain_hold(chain
);
2828 NL_SET_ERR_MSG(extack
, "Filter chain already exists");
2830 goto errout_block_locked
;
2833 if (!(n
->nlmsg_flags
& NLM_F_CREATE
)) {
2834 NL_SET_ERR_MSG(extack
, "Need both RTM_NEWCHAIN and NLM_F_CREATE to create a new chain");
2836 goto errout_block_locked
;
2838 chain
= tcf_chain_create(block
, chain_index
);
2840 NL_SET_ERR_MSG(extack
, "Failed to create filter chain");
2842 goto errout_block_locked
;
2846 if (!chain
|| tcf_chain_held_by_acts_only(chain
)) {
2847 NL_SET_ERR_MSG(extack
, "Cannot find specified filter chain");
2849 goto errout_block_locked
;
2851 tcf_chain_hold(chain
);
2854 if (n
->nlmsg_type
== RTM_NEWCHAIN
) {
2855 /* Modifying chain requires holding parent block lock. In case
2856 * the chain was successfully added, take a reference to the
2857 * chain. This ensures that an empty chain does not disappear at
2858 * the end of this function.
2860 tcf_chain_hold(chain
);
2861 chain
->explicitly_created
= true;
2863 mutex_unlock(&block
->lock
);
2865 switch (n
->nlmsg_type
) {
2867 err
= tc_chain_tmplt_add(chain
, net
, tca
, extack
);
2869 tcf_chain_put_explicitly_created(chain
);
2873 tc_chain_notify(chain
, NULL
, 0, NLM_F_CREATE
| NLM_F_EXCL
,
2874 RTM_NEWCHAIN
, false);
2877 tfilter_notify_chain(net
, skb
, block
, q
, parent
, n
,
2878 chain
, RTM_DELTFILTER
, true);
2879 /* Flush the chain first as the user requested chain removal. */
2880 tcf_chain_flush(chain
, true);
2881 /* In case the chain was successfully deleted, put a reference
2882 * to the chain previously taken during addition.
2884 tcf_chain_put_explicitly_created(chain
);
2887 err
= tc_chain_notify(chain
, skb
, n
->nlmsg_seq
,
2888 n
->nlmsg_seq
, n
->nlmsg_type
, true);
2890 NL_SET_ERR_MSG(extack
, "Failed to send chain notify message");
2894 NL_SET_ERR_MSG(extack
, "Unsupported message type");
2899 tcf_chain_put(chain
);
2901 tcf_block_release(q
, block
, true);
2903 /* Replay the request. */
2907 errout_block_locked
:
2908 mutex_unlock(&block
->lock
);
2912 /* called with RTNL */
2913 static int tc_dump_chain(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2915 struct net
*net
= sock_net(skb
->sk
);
2916 struct nlattr
*tca
[TCA_MAX
+ 1];
2917 struct Qdisc
*q
= NULL
;
2918 struct tcf_block
*block
;
2919 struct tcmsg
*tcm
= nlmsg_data(cb
->nlh
);
2920 struct tcf_chain
*chain
;
2926 if (nlmsg_len(cb
->nlh
) < sizeof(*tcm
))
2929 err
= nlmsg_parse(cb
->nlh
, sizeof(*tcm
), tca
, TCA_MAX
, rtm_tca_policy
,
2934 if (tcm
->tcm_ifindex
== TCM_IFINDEX_MAGIC_BLOCK
) {
2935 block
= tcf_block_refcnt_get(net
, tcm
->tcm_block_index
);
2938 /* If we work with block index, q is NULL and parent value
2939 * will never be used in the following code. The check
2940 * in tcf_fill_node prevents it. However, compiler does not
2941 * see that far, so set parent to zero to silence the warning
2942 * about parent being uninitialized.
2946 const struct Qdisc_class_ops
*cops
;
2947 struct net_device
*dev
;
2948 unsigned long cl
= 0;
2950 dev
= __dev_get_by_index(net
, tcm
->tcm_ifindex
);
2954 parent
= tcm
->tcm_parent
;
2959 q
= qdisc_lookup(dev
, TC_H_MAJ(tcm
->tcm_parent
));
2963 cops
= q
->ops
->cl_ops
;
2966 if (!cops
->tcf_block
)
2968 if (TC_H_MIN(tcm
->tcm_parent
)) {
2969 cl
= cops
->find(q
, tcm
->tcm_parent
);
2973 block
= cops
->tcf_block(q
, cl
, NULL
);
2976 if (tcf_block_shared(block
))
2980 index_start
= cb
->args
[0];
2983 mutex_lock(&block
->lock
);
2984 list_for_each_entry(chain
, &block
->chain_list
, list
) {
2985 if ((tca
[TCA_CHAIN
] &&
2986 nla_get_u32(tca
[TCA_CHAIN
]) != chain
->index
))
2988 if (index
< index_start
) {
2992 if (tcf_chain_held_by_acts_only(chain
))
2994 err
= tc_chain_fill_node(chain
->tmplt_ops
, chain
->tmplt_priv
,
2995 chain
->index
, net
, skb
, block
,
2996 NETLINK_CB(cb
->skb
).portid
,
2997 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
3003 mutex_unlock(&block
->lock
);
3005 if (tcm
->tcm_ifindex
== TCM_IFINDEX_MAGIC_BLOCK
)
3006 tcf_block_refcnt_put(block
, true);
3007 cb
->args
[0] = index
;
3010 /* If we did no progress, the error (EMSGSIZE) is real */
3011 if (skb
->len
== 0 && err
)
3016 void tcf_exts_destroy(struct tcf_exts
*exts
)
3018 #ifdef CONFIG_NET_CLS_ACT
3019 tcf_action_destroy(exts
->actions
, TCA_ACT_UNBIND
);
3020 kfree(exts
->actions
);
3021 exts
->nr_actions
= 0;
3024 EXPORT_SYMBOL(tcf_exts_destroy
);
3026 int tcf_exts_validate(struct net
*net
, struct tcf_proto
*tp
, struct nlattr
**tb
,
3027 struct nlattr
*rate_tlv
, struct tcf_exts
*exts
, bool ovr
,
3028 bool rtnl_held
, struct netlink_ext_ack
*extack
)
3030 #ifdef CONFIG_NET_CLS_ACT
3032 struct tc_action
*act
;
3033 size_t attr_size
= 0;
3035 if (exts
->police
&& tb
[exts
->police
]) {
3036 act
= tcf_action_init_1(net
, tp
, tb
[exts
->police
],
3037 rate_tlv
, "police", ovr
,
3038 TCA_ACT_BIND
, rtnl_held
,
3041 return PTR_ERR(act
);
3043 act
->type
= exts
->type
= TCA_OLD_COMPAT
;
3044 exts
->actions
[0] = act
;
3045 exts
->nr_actions
= 1;
3046 } else if (exts
->action
&& tb
[exts
->action
]) {
3049 err
= tcf_action_init(net
, tp
, tb
[exts
->action
],
3050 rate_tlv
, NULL
, ovr
, TCA_ACT_BIND
,
3051 exts
->actions
, &attr_size
,
3055 exts
->nr_actions
= err
;
3059 if ((exts
->action
&& tb
[exts
->action
]) ||
3060 (exts
->police
&& tb
[exts
->police
])) {
3061 NL_SET_ERR_MSG(extack
, "Classifier actions are not supported per compile options (CONFIG_NET_CLS_ACT)");
3068 EXPORT_SYMBOL(tcf_exts_validate
);
3070 void tcf_exts_change(struct tcf_exts
*dst
, struct tcf_exts
*src
)
3072 #ifdef CONFIG_NET_CLS_ACT
3073 struct tcf_exts old
= *dst
;
3076 tcf_exts_destroy(&old
);
3079 EXPORT_SYMBOL(tcf_exts_change
);
3081 #ifdef CONFIG_NET_CLS_ACT
3082 static struct tc_action
*tcf_exts_first_act(struct tcf_exts
*exts
)
3084 if (exts
->nr_actions
== 0)
3087 return exts
->actions
[0];
3091 int tcf_exts_dump(struct sk_buff
*skb
, struct tcf_exts
*exts
)
3093 #ifdef CONFIG_NET_CLS_ACT
3094 struct nlattr
*nest
;
3096 if (exts
->action
&& tcf_exts_has_actions(exts
)) {
3098 * again for backward compatible mode - we want
3099 * to work with both old and new modes of entering
3100 * tc data even if iproute2 was newer - jhs
3102 if (exts
->type
!= TCA_OLD_COMPAT
) {
3103 nest
= nla_nest_start(skb
, exts
->action
);
3105 goto nla_put_failure
;
3107 if (tcf_action_dump(skb
, exts
->actions
, 0, 0) < 0)
3108 goto nla_put_failure
;
3109 nla_nest_end(skb
, nest
);
3110 } else if (exts
->police
) {
3111 struct tc_action
*act
= tcf_exts_first_act(exts
);
3112 nest
= nla_nest_start(skb
, exts
->police
);
3113 if (nest
== NULL
|| !act
)
3114 goto nla_put_failure
;
3115 if (tcf_action_dump_old(skb
, act
, 0, 0) < 0)
3116 goto nla_put_failure
;
3117 nla_nest_end(skb
, nest
);
3123 nla_nest_cancel(skb
, nest
);
3129 EXPORT_SYMBOL(tcf_exts_dump
);
3132 int tcf_exts_dump_stats(struct sk_buff
*skb
, struct tcf_exts
*exts
)
3134 #ifdef CONFIG_NET_CLS_ACT
3135 struct tc_action
*a
= tcf_exts_first_act(exts
);
3136 if (a
!= NULL
&& tcf_action_copy_stats(skb
, a
, 1) < 0)
3141 EXPORT_SYMBOL(tcf_exts_dump_stats
);
3143 int tc_setup_cb_call(struct tcf_block
*block
, enum tc_setup_type type
,
3144 void *type_data
, bool err_stop
)
3146 struct tcf_block_cb
*block_cb
;
3150 /* Make sure all netdevs sharing this block are offload-capable. */
3151 if (block
->nooffloaddevcnt
&& err_stop
)
3154 list_for_each_entry(block_cb
, &block
->cb_list
, list
) {
3155 err
= block_cb
->cb(type
, type_data
, block_cb
->cb_priv
);
3165 EXPORT_SYMBOL(tc_setup_cb_call
);
3167 int tc_setup_flow_action(struct flow_action
*flow_action
,
3168 const struct tcf_exts
*exts
)
3170 const struct tc_action
*act
;
3177 tcf_exts_for_each_action(i
, act
, exts
) {
3178 struct flow_action_entry
*entry
;
3180 entry
= &flow_action
->entries
[j
];
3181 if (is_tcf_gact_ok(act
)) {
3182 entry
->id
= FLOW_ACTION_ACCEPT
;
3183 } else if (is_tcf_gact_shot(act
)) {
3184 entry
->id
= FLOW_ACTION_DROP
;
3185 } else if (is_tcf_gact_trap(act
)) {
3186 entry
->id
= FLOW_ACTION_TRAP
;
3187 } else if (is_tcf_gact_goto_chain(act
)) {
3188 entry
->id
= FLOW_ACTION_GOTO
;
3189 entry
->chain_index
= tcf_gact_goto_chain_index(act
);
3190 } else if (is_tcf_mirred_egress_redirect(act
)) {
3191 entry
->id
= FLOW_ACTION_REDIRECT
;
3192 entry
->dev
= tcf_mirred_dev(act
);
3193 } else if (is_tcf_mirred_egress_mirror(act
)) {
3194 entry
->id
= FLOW_ACTION_MIRRED
;
3195 entry
->dev
= tcf_mirred_dev(act
);
3196 } else if (is_tcf_vlan(act
)) {
3197 switch (tcf_vlan_action(act
)) {
3198 case TCA_VLAN_ACT_PUSH
:
3199 entry
->id
= FLOW_ACTION_VLAN_PUSH
;
3200 entry
->vlan
.vid
= tcf_vlan_push_vid(act
);
3201 entry
->vlan
.proto
= tcf_vlan_push_proto(act
);
3202 entry
->vlan
.prio
= tcf_vlan_push_prio(act
);
3204 case TCA_VLAN_ACT_POP
:
3205 entry
->id
= FLOW_ACTION_VLAN_POP
;
3207 case TCA_VLAN_ACT_MODIFY
:
3208 entry
->id
= FLOW_ACTION_VLAN_MANGLE
;
3209 entry
->vlan
.vid
= tcf_vlan_push_vid(act
);
3210 entry
->vlan
.proto
= tcf_vlan_push_proto(act
);
3211 entry
->vlan
.prio
= tcf_vlan_push_prio(act
);
3216 } else if (is_tcf_tunnel_set(act
)) {
3217 entry
->id
= FLOW_ACTION_TUNNEL_ENCAP
;
3218 entry
->tunnel
= tcf_tunnel_info(act
);
3219 } else if (is_tcf_tunnel_release(act
)) {
3220 entry
->id
= FLOW_ACTION_TUNNEL_DECAP
;
3221 entry
->tunnel
= tcf_tunnel_info(act
);
3222 } else if (is_tcf_pedit(act
)) {
3223 for (k
= 0; k
< tcf_pedit_nkeys(act
); k
++) {
3224 switch (tcf_pedit_cmd(act
, k
)) {
3225 case TCA_PEDIT_KEY_EX_CMD_SET
:
3226 entry
->id
= FLOW_ACTION_MANGLE
;
3228 case TCA_PEDIT_KEY_EX_CMD_ADD
:
3229 entry
->id
= FLOW_ACTION_ADD
;
3234 entry
->mangle
.htype
= tcf_pedit_htype(act
, k
);
3235 entry
->mangle
.mask
= tcf_pedit_mask(act
, k
);
3236 entry
->mangle
.val
= tcf_pedit_val(act
, k
);
3237 entry
->mangle
.offset
= tcf_pedit_offset(act
, k
);
3238 entry
= &flow_action
->entries
[++j
];
3240 } else if (is_tcf_csum(act
)) {
3241 entry
->id
= FLOW_ACTION_CSUM
;
3242 entry
->csum_flags
= tcf_csum_update_flags(act
);
3243 } else if (is_tcf_skbedit_mark(act
)) {
3244 entry
->id
= FLOW_ACTION_MARK
;
3245 entry
->mark
= tcf_skbedit_mark(act
);
3250 if (!is_tcf_pedit(act
))
3257 EXPORT_SYMBOL(tc_setup_flow_action
);
3259 unsigned int tcf_exts_num_actions(struct tcf_exts
*exts
)
3261 unsigned int num_acts
= 0;
3262 struct tc_action
*act
;
3265 tcf_exts_for_each_action(i
, act
, exts
) {
3266 if (is_tcf_pedit(act
))
3267 num_acts
+= tcf_pedit_nkeys(act
);
3273 EXPORT_SYMBOL(tcf_exts_num_actions
);
3275 static __net_init
int tcf_net_init(struct net
*net
)
3277 struct tcf_net
*tn
= net_generic(net
, tcf_net_id
);
3279 spin_lock_init(&tn
->idr_lock
);
3284 static void __net_exit
tcf_net_exit(struct net
*net
)
3286 struct tcf_net
*tn
= net_generic(net
, tcf_net_id
);
3288 idr_destroy(&tn
->idr
);
3291 static struct pernet_operations tcf_net_ops
= {
3292 .init
= tcf_net_init
,
3293 .exit
= tcf_net_exit
,
3295 .size
= sizeof(struct tcf_net
),
3298 static int __init
tc_filter_init(void)
3302 tc_filter_wq
= alloc_ordered_workqueue("tc_filter_workqueue", 0);
3306 err
= register_pernet_subsys(&tcf_net_ops
);
3308 goto err_register_pernet_subsys
;
3310 err
= rhashtable_init(&indr_setup_block_ht
,
3311 &tc_indr_setup_block_ht_params
);
3313 goto err_rhash_setup_block_ht
;
3315 rtnl_register(PF_UNSPEC
, RTM_NEWTFILTER
, tc_new_tfilter
, NULL
,
3316 RTNL_FLAG_DOIT_UNLOCKED
);
3317 rtnl_register(PF_UNSPEC
, RTM_DELTFILTER
, tc_del_tfilter
, NULL
,
3318 RTNL_FLAG_DOIT_UNLOCKED
);
3319 rtnl_register(PF_UNSPEC
, RTM_GETTFILTER
, tc_get_tfilter
,
3320 tc_dump_tfilter
, RTNL_FLAG_DOIT_UNLOCKED
);
3321 rtnl_register(PF_UNSPEC
, RTM_NEWCHAIN
, tc_ctl_chain
, NULL
, 0);
3322 rtnl_register(PF_UNSPEC
, RTM_DELCHAIN
, tc_ctl_chain
, NULL
, 0);
3323 rtnl_register(PF_UNSPEC
, RTM_GETCHAIN
, tc_ctl_chain
,
3328 err_rhash_setup_block_ht
:
3329 unregister_pernet_subsys(&tcf_net_ops
);
3330 err_register_pernet_subsys
:
3331 destroy_workqueue(tc_filter_wq
);
3335 subsys_initcall(tc_filter_init
);