summaryrefslogtreecommitdiff
path: root/include/net/pkt_cls.h
blob: d5e7a1af346fe06b6ad8f8e091a3ad8a77e7d399 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_PKT_CLS_H
#define __NET_PKT_CLS_H

#include <linux/pkt_cls.h>
#include <linux/workqueue.h>
#include <net/sch_generic.h>
#include <net/act_api.h>
#include <net/flow_offload.h>

/* TC action not accessible from user space */
#define TC_ACT_REINSERT		(TC_ACT_VALUE_MAX + 1)

/* Basic packet classifier frontend definitions. */

struct tcf_walker {
	int	stop;
	int	skip;
	int	count;
	bool	nonempty;
	unsigned long cookie;
	int	(*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
};

int register_tcf_proto_ops(struct tcf_proto_ops *ops);
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);

enum tcf_block_binder_type {
	TCF_BLOCK_BINDER_TYPE_UNSPEC,
	TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
	TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
};

struct tcf_block_ext_info {
	enum tcf_block_binder_type binder_type;
	tcf_chain_head_change_t *chain_head_change;
	void *chain_head_change_priv;
	u32 block_index;
};

struct tcf_block_cb;
bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);

#ifdef CONFIG_NET_CLS
struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
				       u32 chain_index);
void tcf_chain_put_by_act(struct tcf_chain *chain);
struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
				     struct tcf_chain *chain);
struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
				     struct tcf_proto *tp, bool rtnl_held);
void tcf_block_netif_keep_dst(struct tcf_block *block);
int tcf_block_get(struct tcf_block **p_block,
		  struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
		  struct netlink_ext_ack *extack);
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
		      struct tcf_block_ext_info *ei,
		      struct netlink_ext_ack *extack);
void tcf_block_put(struct tcf_block *block);
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
		       struct tcf_block_ext_info *ei);

static inline bool tcf_block_shared(struct tcf_block *block)
{
	return block->index;
}

static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
	WARN_ON(tcf_block_shared(block));
	return block->q;
}

void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
					 tc_setup_cb_t *cb, void *cb_ident);
void tcf_block_cb_incref(struct tcf_block_cb *block_cb);
unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb);
struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
					     tc_setup_cb_t *cb, void *cb_ident,
					     void *cb_priv,
					     struct netlink_ext_ack *extack);
int tcf_block_cb_register(struct tcf_block *block,
			  tc_setup_cb_t *cb, void *cb_ident,
			  void *cb_priv, struct netlink_ext_ack *extack);
void __tcf_block_cb_unregister(struct tcf_block *block,
			       struct tcf_block_cb *block_cb);
void tcf_block_cb_unregister(struct tcf_block *block,
			     tc_setup_cb_t *cb, void *cb_ident);
int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
				tc_indr_block_bind_cb_t *cb, void *cb_ident);
int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
			      tc_indr_block_bind_cb_t *cb, void *cb_ident);
void __tc_indr_block_cb_unregister(struct net_device *dev,
				   tc_indr_block_bind_cb_t *cb, void *cb_ident);
void tc_indr_block_cb_unregister(struct net_device *dev,
				 tc_indr_block_bind_cb_t *cb, void *cb_ident);

int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
		 struct tcf_result *res, bool compat_mode);

#else
static inline
int tcf_block_get(struct tcf_block **p_block,
		  struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
		  struct netlink_ext_ack *extack)
{
	return 0;
}

static inline
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
		      struct tcf_block_ext_info *ei,
		      struct netlink_ext_ack *extack)
{
	return 0;
}

static inline void tcf_block_put(struct tcf_block *block)
{
}

static inline
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
		       struct tcf_block_ext_info *ei)
{
}

static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
	return NULL;
}

static inline
int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
			       void *cb_priv)
{
	return 0;
}

static inline
void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
				  void *cb_priv)
{
}

static inline
void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
{
	return NULL;
}

static inline
struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
					 tc_setup_cb_t *cb, void *cb_ident)
{
	return NULL;
}

static inline
void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
{
}

static inline
unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
{
	return 0;
}

static inline
struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
					     tc_setup_cb_t *cb, void *cb_ident,
					     void *cb_priv,
					     struct netlink_ext_ack *extack)
{
	return NULL;
}

static inline
int tcf_block_cb_register(struct tcf_block *block,
			  tc_setup_cb_t *cb, void *cb_ident,
			  void *cb_priv, struct netlink_ext_ack *extack)
{
	return 0;
}

static inline
void __tcf_block_cb_unregister(struct tcf_block *block,
			       struct tcf_block_cb *block_cb)
{
}

static inline
void tcf_block_cb_unregister(struct tcf_block *block,
			     tc_setup_cb_t *cb, void *cb_ident)
{
}

static inline
int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
				tc_indr_block_bind_cb_t *cb, void *cb_ident)
{
	return 0;
}

static inline
int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
			      tc_indr_block_bind_cb_t *cb, void *cb_ident)
{
	return 0;
}

static inline
void __tc_indr_block_cb_unregister(struct net_device *dev,
				   tc_indr_block_bind_cb_t *cb, void *cb_ident)
{
}

static inline
void tc_indr_block_cb_unregister(struct net_device *dev,
				 tc_indr_block_bind_cb_t *cb, void *cb_ident)
{
}

static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
			       struct tcf_result *res, bool compat_mode)
{
	return TC_ACT_UNSPEC;
}
#endif

static inline unsigned long
__cls_set_class(unsigned long *clp, unsigned long cl)
{
	return xchg(clp, cl);
}

static inline unsigned long
cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
{
	unsigned long old_cl;

	sch_tree_lock(q);
	old_cl = __cls_set_class(clp, cl);
	sch_tree_unlock(q);
	return old_cl;
}

static inline void
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
{
	struct Qdisc *q = tp->chain->block->q;
	unsigned long cl;

	/* Check q as it is not set for shared blocks. In that case,
	 * setting class is not supported.
	 */
	if (!q)
		return;
	cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
	cl = cls_set_class(q, &r->class, cl);
	if (cl)
		q->ops->cl_ops->unbind_tcf(q, cl);
}

static inline void
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
{
	struct Qdisc *q = tp->chain->block->q;
	unsigned long cl;

	if (!q)
		return;
	if ((cl = __cls_set_class(&r->class, 0)) != 0)
		q->ops->cl_ops->unbind_tcf(q, cl);
}

struct tcf_exts {
#ifdef CONFIG_NET_CLS_ACT
	__u32	type; /* for backward compat(TCA_OLD_COMPAT) */
	int nr_actions;
	struct tc_action **actions;
	struct net *net;
#endif
	/* Map to export classifier specific extension TLV types to the
	 * generic extensions API. Unsupported extensions must be set to 0.
	 */
	int action;
	int police;
};

static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
				int action, int police)
{
#ifdef CONFIG_NET_CLS_ACT
	exts->type = 0;
	exts->nr_actions = 0;
	exts->net = net;
	exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
				GFP_KERNEL);
	if (!exts->actions)
		return -ENOMEM;
#endif
	exts->action = action;
	exts->police = police;
	return 0;
}

/* Return false if the netns is being destroyed in cleanup_net(). Callers
 * need to do cleanup synchronously in this case, otherwise may race with
 * tc_action_net_exit(). Return true for other cases.
 */
static inline bool tcf_exts_get_net(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	exts->net = maybe_get_net(exts->net);
	return exts->net != NULL;
#else
	return true;
#endif
}

static inline void tcf_exts_put_net(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	if (exts->net)
		put_net(exts->net);
#endif
}

#ifdef CONFIG_NET_CLS_ACT
#define tcf_exts_for_each_action(i, a, exts) \
	for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
#else
#define tcf_exts_for_each_action(i, a, exts) \
	for (; 0; (void)(i), (void)(a), (void)(exts))
#endif

static inline void
tcf_exts_stats_update(const struct tcf_exts *exts,
		      u64 bytes, u64 packets, u64 lastuse)
{
#ifdef CONFIG_NET_CLS_ACT
	int i;

	preempt_disable();

	for (i = 0; i < exts->nr_actions; i++) {
		struct tc_action *a = exts->actions[i];

		tcf_action_stats_update(a, bytes, packets, lastuse, true);
	}

	preempt_enable();
#endif
}

/**
 * tcf_exts_has_actions - check if at least one action is present
 * @exts: tc filter extensions handle
 *
 * Returns true if at least one action is present.
 */
static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	return exts->nr_actions;
#else
	return false;
#endif
}

/**
 * tcf_exts_has_one_action - check if exactly one action is present
 * @exts: tc filter extensions handle
 *
 * Returns true if exactly one action is present.
 */
static inline bool tcf_exts_has_one_action(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	return exts->nr_actions == 1;
#else
	return false;
#endif
}

static inline struct tc_action *tcf_exts_first_action(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	return exts->actions[0];
#else
	return NULL;
#endif
}

/**
 * tcf_exts_exec - execute tc filter extensions
 * @skb: socket buffer
 * @exts: tc filter extensions handle
 * @res: desired result
 *
 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
 * a negative number if the filter must be considered unmatched or
 * a positive action code (TC_ACT_*) which must be returned to the
 * underlying layer.
 */
static inline int
tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
	      struct tcf_result *res)
{
#ifdef CONFIG_NET_CLS_ACT
	return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
#endif
	return TC_ACT_OK;
}

int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
		      struct nlattr **tb, struct nlattr *rate_tlv,
		      struct tcf_exts *exts, bool ovr, bool rtnl_held,
		      struct netlink_ext_ack *extack);
void tcf_exts_destroy(struct tcf_exts *exts);
void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);

/**
 * struct tcf_pkt_info - packet information
 */
struct tcf_pkt_info {
	unsigned char *		ptr;
	int			nexthdr;
};

#ifdef CONFIG_NET_EMATCH

struct tcf_ematch_ops;

/**
 * struct tcf_ematch - extended match (ematch)
 * 
 * @matchid: identifier to allow userspace to reidentify a match
 * @flags: flags specifying attributes and the relation to other matches
 * @ops: the operations lookup table of the corresponding ematch module
 * @datalen: length of the ematch specific configuration data
 * @data: ematch specific data
 */
struct tcf_ematch {
	struct tcf_ematch_ops * ops;
	unsigned long		data;
	unsigned int		datalen;
	u16			matchid;
	u16			flags;
	struct net		*net;
};

static inline int tcf_em_is_container(struct tcf_ematch *em)
{
	return !em->ops;
}

static inline int tcf_em_is_simple(struct tcf_ematch *em)
{
	return em->flags & TCF_EM_SIMPLE;
}

static inline int tcf_em_is_inverted(struct tcf_ematch *em)
{
	return em->flags & TCF_EM_INVERT;
}

static inline int tcf_em_last_match(struct tcf_ematch *em)
{
	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
}

static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
{
	if (tcf_em_last_match(em))
		return 1;

	if (result == 0 && em->flags & TCF_EM_REL_AND)
		return 1;

	if (result != 0 && em->flags & TCF_EM_REL_OR)
		return 1;

	return 0;
}
	
/**
 * struct tcf_ematch_tree - ematch tree handle
 *
 * @hdr: ematch tree header supplied by userspace
 * @matches: array of ematches
 */
struct tcf_ematch_tree {
	struct tcf_ematch_tree_hdr hdr;
	struct tcf_ematch *	matches;
	
};

/**
 * struct tcf_ematch_ops - ematch module operations
 * 
 * @kind: identifier (kind) of this ematch module
 * @datalen: length of expected configuration data (optional)
 * @change: called during validation (optional)
 * @match: called during ematch tree evaluation, must return 1/0
 * @destroy: called during destroyage (optional)
 * @dump: called during dumping process (optional)
 * @owner: owner, must be set to THIS_MODULE
 * @link: link to previous/next ematch module (internal use)
 */
struct tcf_ematch_ops {
	int			kind;
	int			datalen;
	int			(*change)(struct net *net, void *,
					  int, struct tcf_ematch *);
	int			(*match)(struct sk_buff *, struct tcf_ematch *,
					 struct tcf_pkt_info *);
	void			(*destroy)(struct tcf_ematch *);
	int			(*dump)(struct sk_buff *, struct tcf_ematch *);
	struct module		*owner;
	struct list_head	link;
};

int tcf_em_register(struct tcf_ematch_ops *);
void tcf_em_unregister(struct tcf_ematch_ops *);
int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
			 struct tcf_ematch_tree *);
void tcf_em_tree_destroy(struct tcf_ematch_tree *);
int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
			struct tcf_pkt_info *);

/**
 * tcf_em_tree_match - evaulate an ematch tree
 *
 * @skb: socket buffer of the packet in question
 * @tree: ematch tree to be used for evaluation
 * @info: packet information examined by classifier
 *
 * This function matches @skb against the ematch tree in @tree by going
 * through all ematches respecting their logic relations returning
 * as soon as the result is obvious.
 *
 * Returns 1 if the ematch tree as-one matches, no ematches are configured
 * or ematch is not enabled in the kernel, otherwise 0 is returned.
 */
static inline int tcf_em_tree_match(struct sk_buff *skb,
				    struct tcf_ematch_tree *tree,
				    struct tcf_pkt_info *info)
{
	if (tree->hdr.nmatches)
		return __tcf_em_tree_match(skb, tree, info);
	else
		return 1;
}

#define MODULE_ALIAS_TCF_EMATCH(kind)	MODULE_ALIAS("ematch-kind-" __stringify(kind))

#else /* CONFIG_NET_EMATCH */

struct tcf_ematch_tree {
};

#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
#define tcf_em_tree_dump(skb, t, tlv) (0)
#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)

#endif /* CONFIG_NET_EMATCH */

static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
{
	switch (layer) {
		case TCF_LAYER_LINK:
			return skb_mac_header(skb);
		case TCF_LAYER_NETWORK:
			return skb_network_header(skb);
		case TCF_LAYER_TRANSPORT:
			return skb_transport_header(skb);
	}

	return NULL;
}

static inline int tcf_valid_offset(const struct sk_buff *skb,
				   const unsigned char *ptr, const int len)
{
	return likely((ptr + len) <= skb_tail_pointer(skb) &&
		      ptr >= skb->head &&
		      (ptr <= (ptr + len)));
}

#ifdef CONFIG_NET_CLS_IND
#include <net/net_namespace.h>

static inline int
tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
		 struct netlink_ext_ack *extack)
{
	char indev[IFNAMSIZ];
	struct net_device *dev;

	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
		NL_SET_ERR_MSG(extack, "Interface name too long");
		return -EINVAL;
	}
	dev = __dev_get_by_name(net, indev);
	if (!dev)
		return -ENODEV;
	return dev->ifindex;
}

static inline bool
tcf_match_indev(struct sk_buff *skb, int ifindex)
{
	if (!ifindex)
		return true;
	if  (!skb->skb_iif)
		return false;
	return ifindex == skb->skb_iif;
}
#endif /* CONFIG_NET_CLS_IND */

int tc_setup_flow_action(struct flow_action *flow_action,
			 const struct tcf_exts *exts);
int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
		     void *type_data, bool err_stop);
unsigned int tcf_exts_num_actions(struct tcf_exts *exts);

enum tc_block_command {
	TC_BLOCK_BIND,
	TC_BLOCK_UNBIND,
};

struct tc_block_offload {
	enum tc_block_command command;
	enum tcf_block_binder_type binder_type;
	struct tcf_block *block;
	struct netlink_ext_ack *extack;
};

struct tc_cls_common_offload {
	u32 chain_index;
	__be16 protocol;
	u32 prio;
	struct netlink_ext_ack *extack;
};

struct tc_cls_u32_knode {
	struct tcf_exts *exts;
	struct tcf_result *res;
	struct tc_u32_sel *sel;
	u32 handle;
	u32 val;
	u32 mask;
	u32 link_handle;
	u8 fshift;
};

struct tc_cls_u32_hnode {
	u32 handle;
	u32 prio;
	unsigned int divisor;
};

enum tc_clsu32_command {
	TC_CLSU32_NEW_KNODE,
	TC_CLSU32_REPLACE_KNODE,
	TC_CLSU32_DELETE_KNODE,
	TC_CLSU32_NEW_HNODE,
	TC_CLSU32_REPLACE_HNODE,
	TC_CLSU32_DELETE_HNODE,
};

struct tc_cls_u32_offload {
	struct tc_cls_common_offload common;
	/* knode values */
	enum tc_clsu32_command command;
	union {
		struct tc_cls_u32_knode knode;
		struct tc_cls_u32_hnode hnode;
	};
};

static inline bool tc_can_offload(const struct net_device *dev)
{
	return dev->features & NETIF_F_HW_TC;
}

static inline bool tc_can_offload_extack(const struct net_device *dev,
					 struct netlink_ext_ack *extack)
{
	bool can = tc_can_offload(dev);

	if (!can)
		NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");

	return can;
}

static inline bool
tc_cls_can_offload_and_chain0(const struct net_device *dev,
			      struct tc_cls_common_offload *common)
{
	if (!tc_can_offload_extack(dev, common->extack))
		return false;
	if (common->chain_index) {
		NL_SET_ERR_MSG(common->extack,
			       "Driver supports only offload of chain 0");
		return false;
	}
	return true;
}

static inline bool tc_skip_hw(u32 flags)
{
	return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
}

static inline bool tc_skip_sw(u32 flags)
{
	return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
}

/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
static inline bool tc_flags_valid(u32 flags)
{
	if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
		      TCA_CLS_FLAGS_VERBOSE))
		return false;

	flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
	if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
		return false;

	return true;
}

static inline bool tc_in_hw(u32 flags)
{
	return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
}

static inline void
tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common,
			   const struct tcf_proto *tp, u32 flags,
			   struct netlink_ext_ack *extack)
{
	cls_common->chain_index = tp->chain->index;
	cls_common->protocol = tp->protocol;
	cls_common->prio = tp->prio;
	if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
		cls_common->extack = extack;
}

enum tc_fl_command {
	TC_CLSFLOWER_REPLACE,
	TC_CLSFLOWER_DESTROY,
	TC_CLSFLOWER_STATS,
	TC_CLSFLOWER_TMPLT_CREATE,
	TC_CLSFLOWER_TMPLT_DESTROY,
};

struct tc_cls_flower_offload {
	struct tc_cls_common_offload common;
	enum tc_fl_command command;
	unsigned long cookie;
	struct flow_rule *rule;
	struct flow_stats stats;
	u32 classid;
};

static inline struct flow_rule *
tc_cls_flower_offload_flow_rule(struct tc_cls_flower_offload *tc_flow_cmd)
{
	return tc_flow_cmd->rule;
}

enum tc_matchall_command {
	TC_CLSMATCHALL_REPLACE,
	TC_CLSMATCHALL_DESTROY,
};

struct tc_cls_matchall_offload {
	struct tc_cls_common_offload common;
	enum tc_matchall_command command;
	struct tcf_exts *exts;
	unsigned long cookie;
};

enum tc_clsbpf_command {
	TC_CLSBPF_OFFLOAD,
	TC_CLSBPF_STATS,
};

struct tc_cls_bpf_offload {
	struct tc_cls_common_offload common;
	enum tc_clsbpf_command command;
	struct tcf_exts *exts;
	struct bpf_prog *prog;
	struct bpf_prog *oldprog;
	const char *name;
	bool exts_integrated;
};

struct tc_mqprio_qopt_offload {
	/* struct tc_mqprio_qopt must always be the first element */
	struct tc_mqprio_qopt qopt;
	u16 mode;
	u16 shaper;
	u32 flags;
	u64 min_rate[TC_QOPT_MAX_QUEUE];
	u64 max_rate[TC_QOPT_MAX_QUEUE];
};

/* This structure holds cookie structure that is passed from user
 * to the kernel for actions and classifiers
 */
struct tc_cookie {
	u8  *data;
	u32 len;
	struct rcu_head rcu;
};

struct tc_qopt_offload_stats {
	struct gnet_stats_basic_packed *bstats;
	struct gnet_stats_queue *qstats;
};

enum tc_mq_command {
	TC_MQ_CREATE,
	TC_MQ_DESTROY,
	TC_MQ_STATS,
	TC_MQ_GRAFT,
};

struct tc_mq_opt_offload_graft_params {
	unsigned long queue;
	u32 child_handle;
};

struct tc_mq_qopt_offload {
	enum tc_mq_command command;
	u32 handle;
	union {
		struct tc_qopt_offload_stats stats;
		struct tc_mq_opt_offload_graft_params graft_params;
	};
};

enum tc_red_command {
	TC_RED_REPLACE,
	TC_RED_DESTROY,
	TC_RED_STATS,
	TC_RED_XSTATS,
	TC_RED_GRAFT,
};

struct tc_red_qopt_offload_params {
	u32 min;
	u32 max;
	u32 probability;
	u32 limit;
	bool is_ecn;
	bool is_harddrop;
	struct gnet_stats_queue *qstats;
};

struct tc_red_qopt_offload {
	enum tc_red_command command;
	u32 handle;
	u32 parent;
	union {
		struct tc_red_qopt_offload_params set;
		struct tc_qopt_offload_stats stats;
		struct red_stats *xstats;
		u32 child_handle;
	};
};

enum tc_gred_command {
	TC_GRED_REPLACE,
	TC_GRED_DESTROY,
	TC_GRED_STATS,
};

struct tc_gred_vq_qopt_offload_params {
	bool present;
	u32 limit;
	u32 prio;
	u32 min;
	u32 max;
	bool is_ecn;
	bool is_harddrop;
	u32 probability;
	/* Only need backlog, see struct tc_prio_qopt_offload_params */
	u32 *backlog;
};

struct tc_gred_qopt_offload_params {
	bool grio_on;
	bool wred_on;
	unsigned int dp_cnt;
	unsigned int dp_def;
	struct gnet_stats_queue *qstats;
	struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
};

struct tc_gred_qopt_offload_stats {
	struct gnet_stats_basic_packed bstats[MAX_DPs];
	struct gnet_stats_queue qstats[MAX_DPs];
	struct red_stats *xstats[MAX_DPs];
};

struct tc_gred_qopt_offload {
	enum tc_gred_command command;
	u32 handle;
	u32 parent;
	union {
		struct tc_gred_qopt_offload_params set;
		struct tc_gred_qopt_offload_stats stats;
	};
};

enum tc_prio_command {
	TC_PRIO_REPLACE,
	TC_PRIO_DESTROY,
	TC_PRIO_STATS,
	TC_PRIO_GRAFT,
};

struct tc_prio_qopt_offload_params {
	int bands;
	u8 priomap[TC_PRIO_MAX + 1];
	/* In case that a prio qdisc is offloaded and now is changed to a
	 * non-offloadedable config, it needs to update the backlog & qlen
	 * values to negate the HW backlog & qlen values (and only them).
	 */
	struct gnet_stats_queue *qstats;
};

struct tc_prio_qopt_offload_graft_params {
	u8 band;
	u32 child_handle;
};

struct tc_prio_qopt_offload {
	enum tc_prio_command command;
	u32 handle;
	u32 parent;
	union {
		struct tc_prio_qopt_offload_params replace_params;
		struct tc_qopt_offload_stats stats;
		struct tc_prio_qopt_offload_graft_params graft_params;
	};
};

enum tc_root_command {
	TC_ROOT_GRAFT,
};

struct tc_root_qopt_offload {
	enum tc_root_command command;
	u32 handle;
	bool ingress;
};

#endif