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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_PKT_CLS_H
3#define __NET_PKT_CLS_H
4
5#include <linux/pkt_cls.h>
6#include <linux/workqueue.h>
7#include <net/sch_generic.h>
8#include <net/act_api.h>
9
10/* Basic packet classifier frontend definitions. */
11
12struct tcf_walker {
13 int stop;
14 int skip;
15 int count;
16 int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
17};
18
19int register_tcf_proto_ops(struct tcf_proto_ops *ops);
20int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
21
22enum tcf_block_binder_type {
23 TCF_BLOCK_BINDER_TYPE_UNSPEC,
24 TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
25 TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
26};
27
28struct tcf_block_ext_info {
29 enum tcf_block_binder_type binder_type;
30 tcf_chain_head_change_t *chain_head_change;
31 void *chain_head_change_priv;
32 u32 block_index;
33};
34
35struct tcf_block_cb;
36bool tcf_queue_work(struct work_struct *work);
37
38#ifdef CONFIG_NET_CLS
39struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
40 bool create);
41void tcf_chain_put(struct tcf_chain *chain);
42void tcf_block_netif_keep_dst(struct tcf_block *block);
43int tcf_block_get(struct tcf_block **p_block,
44 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
45 struct netlink_ext_ack *extack);
46int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
47 struct tcf_block_ext_info *ei,
48 struct netlink_ext_ack *extack);
49void tcf_block_put(struct tcf_block *block);
50void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
51 struct tcf_block_ext_info *ei);
52
53static inline bool tcf_block_shared(struct tcf_block *block)
54{
55 return block->index;
56}
57
58static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
59{
60 WARN_ON(tcf_block_shared(block));
61 return block->q;
62}
63
64static inline struct net_device *tcf_block_dev(struct tcf_block *block)
65{
66 return tcf_block_q(block)->dev_queue->dev;
67}
68
69void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
70struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
71 tc_setup_cb_t *cb, void *cb_ident);
72void tcf_block_cb_incref(struct tcf_block_cb *block_cb);
73unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb);
74struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
75 tc_setup_cb_t *cb, void *cb_ident,
76 void *cb_priv);
77int tcf_block_cb_register(struct tcf_block *block,
78 tc_setup_cb_t *cb, void *cb_ident,
79 void *cb_priv);
80void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb);
81void tcf_block_cb_unregister(struct tcf_block *block,
82 tc_setup_cb_t *cb, void *cb_ident);
83
84int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
85 struct tcf_result *res, bool compat_mode);
86
87#else
88static inline
89int tcf_block_get(struct tcf_block **p_block,
90 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
91 struct netlink_ext_ack *extack)
92{
93 return 0;
94}
95
96static inline
97int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
98 struct tcf_block_ext_info *ei,
99 struct netlink_ext_ack *extack)
100{
101 return 0;
102}
103
104static inline void tcf_block_put(struct tcf_block *block)
105{
106}
107
108static inline
109void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
110 struct tcf_block_ext_info *ei)
111{
112}
113
114static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
115{
116 return NULL;
117}
118
119static inline struct net_device *tcf_block_dev(struct tcf_block *block)
120{
121 return NULL;
122}
123
124static inline
125int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
126 void *cb_priv)
127{
128 return 0;
129}
130
131static inline
132void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
133 void *cb_priv)
134{
135}
136
137static inline
138void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
139{
140 return NULL;
141}
142
143static inline
144struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
145 tc_setup_cb_t *cb, void *cb_ident)
146{
147 return NULL;
148}
149
150static inline
151void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
152{
153}
154
155static inline
156unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
157{
158 return 0;
159}
160
161static inline
162struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
163 tc_setup_cb_t *cb, void *cb_ident,
164 void *cb_priv)
165{
166 return NULL;
167}
168
169static inline
170int tcf_block_cb_register(struct tcf_block *block,
171 tc_setup_cb_t *cb, void *cb_ident,
172 void *cb_priv)
173{
174 return 0;
175}
176
177static inline
178void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb)
179{
180}
181
182static inline
183void tcf_block_cb_unregister(struct tcf_block *block,
184 tc_setup_cb_t *cb, void *cb_ident)
185{
186}
187
188static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
189 struct tcf_result *res, bool compat_mode)
190{
191 return TC_ACT_UNSPEC;
192}
193#endif
194
195static inline unsigned long
196__cls_set_class(unsigned long *clp, unsigned long cl)
197{
198 return xchg(clp, cl);
199}
200
201static inline unsigned long
202cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
203{
204 unsigned long old_cl;
205
206 sch_tree_lock(q);
207 old_cl = __cls_set_class(clp, cl);
208 sch_tree_unlock(q);
209 return old_cl;
210}
211
212static inline void
213tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
214{
215 struct Qdisc *q = tp->chain->block->q;
216 unsigned long cl;
217
218 /* Check q as it is not set for shared blocks. In that case,
219 * setting class is not supported.
220 */
221 if (!q)
222 return;
223 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
224 cl = cls_set_class(q, &r->class, cl);
225 if (cl)
226 q->ops->cl_ops->unbind_tcf(q, cl);
227}
228
229static inline void
230tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
231{
232 struct Qdisc *q = tp->chain->block->q;
233 unsigned long cl;
234
235 if (!q)
236 return;
237 if ((cl = __cls_set_class(&r->class, 0)) != 0)
238 q->ops->cl_ops->unbind_tcf(q, cl);
239}
240
241struct tcf_exts {
242#ifdef CONFIG_NET_CLS_ACT
243 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
244 int nr_actions;
245 struct tc_action **actions;
246 struct net *net;
247#endif
248 /* Map to export classifier specific extension TLV types to the
249 * generic extensions API. Unsupported extensions must be set to 0.
250 */
251 int action;
252 int police;
253};
254
255static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
256{
257#ifdef CONFIG_NET_CLS_ACT
258 exts->type = 0;
259 exts->nr_actions = 0;
260 exts->net = NULL;
261 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
262 GFP_KERNEL);
263 if (!exts->actions)
264 return -ENOMEM;
265#endif
266 exts->action = action;
267 exts->police = police;
268 return 0;
269}
270
271/* Return false if the netns is being destroyed in cleanup_net(). Callers
272 * need to do cleanup synchronously in this case, otherwise may race with
273 * tc_action_net_exit(). Return true for other cases.
274 */
275static inline bool tcf_exts_get_net(struct tcf_exts *exts)
276{
277#ifdef CONFIG_NET_CLS_ACT
278 exts->net = maybe_get_net(exts->net);
279 return exts->net != NULL;
280#else
281 return true;
282#endif
283}
284
285static inline void tcf_exts_put_net(struct tcf_exts *exts)
286{
287#ifdef CONFIG_NET_CLS_ACT
288 if (exts->net)
289 put_net(exts->net);
290#endif
291}
292
293static inline void tcf_exts_to_list(const struct tcf_exts *exts,
294 struct list_head *actions)
295{
296#ifdef CONFIG_NET_CLS_ACT
297 int i;
298
299 for (i = 0; i < exts->nr_actions; i++) {
300 struct tc_action *a = exts->actions[i];
301
302 list_add_tail(&a->list, actions);
303 }
304#endif
305}
306
307static inline void
308tcf_exts_stats_update(const struct tcf_exts *exts,
309 u64 bytes, u64 packets, u64 lastuse)
310{
311#ifdef CONFIG_NET_CLS_ACT
312 int i;
313
314 preempt_disable();
315
316 for (i = 0; i < exts->nr_actions; i++) {
317 struct tc_action *a = exts->actions[i];
318
319 tcf_action_stats_update(a, bytes, packets, lastuse);
320 }
321
322 preempt_enable();
323#endif
324}
325
326/**
327 * tcf_exts_has_actions - check if at least one action is present
328 * @exts: tc filter extensions handle
329 *
330 * Returns true if at least one action is present.
331 */
332static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
333{
334#ifdef CONFIG_NET_CLS_ACT
335 return exts->nr_actions;
336#else
337 return false;
338#endif
339}
340
341/**
342 * tcf_exts_has_one_action - check if exactly one action is present
343 * @exts: tc filter extensions handle
344 *
345 * Returns true if exactly one action is present.
346 */
347static inline bool tcf_exts_has_one_action(struct tcf_exts *exts)
348{
349#ifdef CONFIG_NET_CLS_ACT
350 return exts->nr_actions == 1;
351#else
352 return false;
353#endif
354}
355
356/**
357 * tcf_exts_exec - execute tc filter extensions
358 * @skb: socket buffer
359 * @exts: tc filter extensions handle
360 * @res: desired result
361 *
362 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
363 * a negative number if the filter must be considered unmatched or
364 * a positive action code (TC_ACT_*) which must be returned to the
365 * underlying layer.
366 */
367static inline int
368tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
369 struct tcf_result *res)
370{
371#ifdef CONFIG_NET_CLS_ACT
372 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
373#endif
374 return TC_ACT_OK;
375}
376
377int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
378 struct nlattr **tb, struct nlattr *rate_tlv,
379 struct tcf_exts *exts, bool ovr,
380 struct netlink_ext_ack *extack);
381void tcf_exts_destroy(struct tcf_exts *exts);
382void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
383int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
384int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
385
386/**
387 * struct tcf_pkt_info - packet information
388 */
389struct tcf_pkt_info {
390 unsigned char * ptr;
391 int nexthdr;
392};
393
394#ifdef CONFIG_NET_EMATCH
395
396struct tcf_ematch_ops;
397
398/**
399 * struct tcf_ematch - extended match (ematch)
400 *
401 * @matchid: identifier to allow userspace to reidentify a match
402 * @flags: flags specifying attributes and the relation to other matches
403 * @ops: the operations lookup table of the corresponding ematch module
404 * @datalen: length of the ematch specific configuration data
405 * @data: ematch specific data
406 */
407struct tcf_ematch {
408 struct tcf_ematch_ops * ops;
409 unsigned long data;
410 unsigned int datalen;
411 u16 matchid;
412 u16 flags;
413 struct net *net;
414};
415
416static inline int tcf_em_is_container(struct tcf_ematch *em)
417{
418 return !em->ops;
419}
420
421static inline int tcf_em_is_simple(struct tcf_ematch *em)
422{
423 return em->flags & TCF_EM_SIMPLE;
424}
425
426static inline int tcf_em_is_inverted(struct tcf_ematch *em)
427{
428 return em->flags & TCF_EM_INVERT;
429}
430
431static inline int tcf_em_last_match(struct tcf_ematch *em)
432{
433 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
434}
435
436static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
437{
438 if (tcf_em_last_match(em))
439 return 1;
440
441 if (result == 0 && em->flags & TCF_EM_REL_AND)
442 return 1;
443
444 if (result != 0 && em->flags & TCF_EM_REL_OR)
445 return 1;
446
447 return 0;
448}
449
450/**
451 * struct tcf_ematch_tree - ematch tree handle
452 *
453 * @hdr: ematch tree header supplied by userspace
454 * @matches: array of ematches
455 */
456struct tcf_ematch_tree {
457 struct tcf_ematch_tree_hdr hdr;
458 struct tcf_ematch * matches;
459
460};
461
462/**
463 * struct tcf_ematch_ops - ematch module operations
464 *
465 * @kind: identifier (kind) of this ematch module
466 * @datalen: length of expected configuration data (optional)
467 * @change: called during validation (optional)
468 * @match: called during ematch tree evaluation, must return 1/0
469 * @destroy: called during destroyage (optional)
470 * @dump: called during dumping process (optional)
471 * @owner: owner, must be set to THIS_MODULE
472 * @link: link to previous/next ematch module (internal use)
473 */
474struct tcf_ematch_ops {
475 int kind;
476 int datalen;
477 int (*change)(struct net *net, void *,
478 int, struct tcf_ematch *);
479 int (*match)(struct sk_buff *, struct tcf_ematch *,
480 struct tcf_pkt_info *);
481 void (*destroy)(struct tcf_ematch *);
482 int (*dump)(struct sk_buff *, struct tcf_ematch *);
483 struct module *owner;
484 struct list_head link;
485};
486
487int tcf_em_register(struct tcf_ematch_ops *);
488void tcf_em_unregister(struct tcf_ematch_ops *);
489int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
490 struct tcf_ematch_tree *);
491void tcf_em_tree_destroy(struct tcf_ematch_tree *);
492int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
493int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
494 struct tcf_pkt_info *);
495
496/**
497 * tcf_em_tree_match - evaulate an ematch tree
498 *
499 * @skb: socket buffer of the packet in question
500 * @tree: ematch tree to be used for evaluation
501 * @info: packet information examined by classifier
502 *
503 * This function matches @skb against the ematch tree in @tree by going
504 * through all ematches respecting their logic relations returning
505 * as soon as the result is obvious.
506 *
507 * Returns 1 if the ematch tree as-one matches, no ematches are configured
508 * or ematch is not enabled in the kernel, otherwise 0 is returned.
509 */
510static inline int tcf_em_tree_match(struct sk_buff *skb,
511 struct tcf_ematch_tree *tree,
512 struct tcf_pkt_info *info)
513{
514 if (tree->hdr.nmatches)
515 return __tcf_em_tree_match(skb, tree, info);
516 else
517 return 1;
518}
519
520#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
521
522#else /* CONFIG_NET_EMATCH */
523
524struct tcf_ematch_tree {
525};
526
527#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
528#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
529#define tcf_em_tree_dump(skb, t, tlv) (0)
530#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
531
532#endif /* CONFIG_NET_EMATCH */
533
534static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
535{
536 switch (layer) {
537 case TCF_LAYER_LINK:
538 return skb_mac_header(skb);
539 case TCF_LAYER_NETWORK:
540 return skb_network_header(skb);
541 case TCF_LAYER_TRANSPORT:
542 return skb_transport_header(skb);
543 }
544
545 return NULL;
546}
547
548static inline int tcf_valid_offset(const struct sk_buff *skb,
549 const unsigned char *ptr, const int len)
550{
551 return likely((ptr + len) <= skb_tail_pointer(skb) &&
552 ptr >= skb->head &&
553 (ptr <= (ptr + len)));
554}
555
556#ifdef CONFIG_NET_CLS_IND
557#include <net/net_namespace.h>
558
559static inline int
560tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
561 struct netlink_ext_ack *extack)
562{
563 char indev[IFNAMSIZ];
564 struct net_device *dev;
565
566 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
567 NL_SET_ERR_MSG(extack, "Interface name too long");
568 return -EINVAL;
569 }
570 dev = __dev_get_by_name(net, indev);
571 if (!dev)
572 return -ENODEV;
573 return dev->ifindex;
574}
575
576static inline bool
577tcf_match_indev(struct sk_buff *skb, int ifindex)
578{
579 if (!ifindex)
580 return true;
581 if (!skb->skb_iif)
582 return false;
583 return ifindex == skb->skb_iif;
584}
585#endif /* CONFIG_NET_CLS_IND */
586
587int tc_setup_cb_call(struct tcf_block *block, struct tcf_exts *exts,
588 enum tc_setup_type type, void *type_data, bool err_stop);
589
590enum tc_block_command {
591 TC_BLOCK_BIND,
592 TC_BLOCK_UNBIND,
593};
594
595struct tc_block_offload {
596 enum tc_block_command command;
597 enum tcf_block_binder_type binder_type;
598 struct tcf_block *block;
599};
600
601struct tc_cls_common_offload {
602 u32 chain_index;
603 __be16 protocol;
604 u32 prio;
605 struct netlink_ext_ack *extack;
606};
607
608struct tc_cls_u32_knode {
609 struct tcf_exts *exts;
610 struct tc_u32_sel *sel;
611 u32 handle;
612 u32 val;
613 u32 mask;
614 u32 link_handle;
615 u8 fshift;
616};
617
618struct tc_cls_u32_hnode {
619 u32 handle;
620 u32 prio;
621 unsigned int divisor;
622};
623
624enum tc_clsu32_command {
625 TC_CLSU32_NEW_KNODE,
626 TC_CLSU32_REPLACE_KNODE,
627 TC_CLSU32_DELETE_KNODE,
628 TC_CLSU32_NEW_HNODE,
629 TC_CLSU32_REPLACE_HNODE,
630 TC_CLSU32_DELETE_HNODE,
631};
632
633struct tc_cls_u32_offload {
634 struct tc_cls_common_offload common;
635 /* knode values */
636 enum tc_clsu32_command command;
637 union {
638 struct tc_cls_u32_knode knode;
639 struct tc_cls_u32_hnode hnode;
640 };
641};
642
643static inline bool tc_can_offload(const struct net_device *dev)
644{
645 return dev->features & NETIF_F_HW_TC;
646}
647
648static inline bool tc_can_offload_extack(const struct net_device *dev,
649 struct netlink_ext_ack *extack)
650{
651 bool can = tc_can_offload(dev);
652
653 if (!can)
654 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
655
656 return can;
657}
658
659static inline bool
660tc_cls_can_offload_and_chain0(const struct net_device *dev,
661 struct tc_cls_common_offload *common)
662{
663 if (!tc_can_offload_extack(dev, common->extack))
664 return false;
665 if (common->chain_index) {
666 NL_SET_ERR_MSG(common->extack,
667 "Driver supports only offload of chain 0");
668 return false;
669 }
670 return true;
671}
672
673static inline bool tc_skip_hw(u32 flags)
674{
675 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
676}
677
678static inline bool tc_skip_sw(u32 flags)
679{
680 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
681}
682
683/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
684static inline bool tc_flags_valid(u32 flags)
685{
686 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
687 return false;
688
689 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
690 return false;
691
692 return true;
693}
694
695static inline bool tc_in_hw(u32 flags)
696{
697 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
698}
699
700static inline void
701tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common,
702 const struct tcf_proto *tp, u32 flags,
703 struct netlink_ext_ack *extack)
704{
705 cls_common->chain_index = tp->chain->index;
706 cls_common->protocol = tp->protocol;
707 cls_common->prio = tp->prio;
708 if (tc_skip_sw(flags))
709 cls_common->extack = extack;
710}
711
712enum tc_fl_command {
713 TC_CLSFLOWER_REPLACE,
714 TC_CLSFLOWER_DESTROY,
715 TC_CLSFLOWER_STATS,
716};
717
718struct tc_cls_flower_offload {
719 struct tc_cls_common_offload common;
720 enum tc_fl_command command;
721 unsigned long cookie;
722 struct flow_dissector *dissector;
723 struct fl_flow_key *mask;
724 struct fl_flow_key *key;
725 struct tcf_exts *exts;
726 u32 classid;
727};
728
729enum tc_matchall_command {
730 TC_CLSMATCHALL_REPLACE,
731 TC_CLSMATCHALL_DESTROY,
732};
733
734struct tc_cls_matchall_offload {
735 struct tc_cls_common_offload common;
736 enum tc_matchall_command command;
737 struct tcf_exts *exts;
738 unsigned long cookie;
739};
740
741enum tc_clsbpf_command {
742 TC_CLSBPF_OFFLOAD,
743 TC_CLSBPF_STATS,
744};
745
746struct tc_cls_bpf_offload {
747 struct tc_cls_common_offload common;
748 enum tc_clsbpf_command command;
749 struct tcf_exts *exts;
750 struct bpf_prog *prog;
751 struct bpf_prog *oldprog;
752 const char *name;
753 bool exts_integrated;
754};
755
756struct tc_mqprio_qopt_offload {
757 /* struct tc_mqprio_qopt must always be the first element */
758 struct tc_mqprio_qopt qopt;
759 u16 mode;
760 u16 shaper;
761 u32 flags;
762 u64 min_rate[TC_QOPT_MAX_QUEUE];
763 u64 max_rate[TC_QOPT_MAX_QUEUE];
764};
765
766/* This structure holds cookie structure that is passed from user
767 * to the kernel for actions and classifiers
768 */
769struct tc_cookie {
770 u8 *data;
771 u32 len;
772};
773
774struct tc_qopt_offload_stats {
775 struct gnet_stats_basic_packed *bstats;
776 struct gnet_stats_queue *qstats;
777};
778
779enum tc_red_command {
780 TC_RED_REPLACE,
781 TC_RED_DESTROY,
782 TC_RED_STATS,
783 TC_RED_XSTATS,
784};
785
786struct tc_red_qopt_offload_params {
787 u32 min;
788 u32 max;
789 u32 probability;
790 bool is_ecn;
791 struct gnet_stats_queue *qstats;
792};
793
794struct tc_red_qopt_offload {
795 enum tc_red_command command;
796 u32 handle;
797 u32 parent;
798 union {
799 struct tc_red_qopt_offload_params set;
800 struct tc_qopt_offload_stats stats;
801 struct red_stats *xstats;
802 };
803};
804
805enum tc_prio_command {
806 TC_PRIO_REPLACE,
807 TC_PRIO_DESTROY,
808 TC_PRIO_STATS,
809 TC_PRIO_GRAFT,
810};
811
812struct tc_prio_qopt_offload_params {
813 int bands;
814 u8 priomap[TC_PRIO_MAX + 1];
815 /* In case that a prio qdisc is offloaded and now is changed to a
816 * non-offloadedable config, it needs to update the backlog & qlen
817 * values to negate the HW backlog & qlen values (and only them).
818 */
819 struct gnet_stats_queue *qstats;
820};
821
822struct tc_prio_qopt_offload_graft_params {
823 u8 band;
824 u32 child_handle;
825};
826
827struct tc_prio_qopt_offload {
828 enum tc_prio_command command;
829 u32 handle;
830 u32 parent;
831 union {
832 struct tc_prio_qopt_offload_params replace_params;
833 struct tc_qopt_offload_stats stats;
834 struct tc_prio_qopt_offload_graft_params graft_params;
835 };
836};
837
838#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_PKT_CLS_H
3#define __NET_PKT_CLS_H
4
5#include <linux/pkt_cls.h>
6#include <linux/workqueue.h>
7#include <net/sch_generic.h>
8#include <net/act_api.h>
9#include <net/net_namespace.h>
10
11/* TC action not accessible from user space */
12#define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1)
13
14/* Basic packet classifier frontend definitions. */
15
16struct tcf_walker {
17 int stop;
18 int skip;
19 int count;
20 bool nonempty;
21 unsigned long cookie;
22 int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
23};
24
25int register_tcf_proto_ops(struct tcf_proto_ops *ops);
26int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
27
28struct tcf_block_ext_info {
29 enum flow_block_binder_type binder_type;
30 tcf_chain_head_change_t *chain_head_change;
31 void *chain_head_change_priv;
32 u32 block_index;
33};
34
35struct tcf_qevent {
36 struct tcf_block *block;
37 struct tcf_block_ext_info info;
38 struct tcf_proto __rcu *filter_chain;
39};
40
41struct tcf_block_cb;
42bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
43
44#ifdef CONFIG_NET_CLS
45struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
46 u32 chain_index);
47void tcf_chain_put_by_act(struct tcf_chain *chain);
48struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
49 struct tcf_chain *chain);
50struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
51 struct tcf_proto *tp, bool rtnl_held);
52void tcf_block_netif_keep_dst(struct tcf_block *block);
53int tcf_block_get(struct tcf_block **p_block,
54 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
55 struct netlink_ext_ack *extack);
56int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
57 struct tcf_block_ext_info *ei,
58 struct netlink_ext_ack *extack);
59void tcf_block_put(struct tcf_block *block);
60void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
61 struct tcf_block_ext_info *ei);
62
63static inline bool tcf_block_shared(struct tcf_block *block)
64{
65 return block->index;
66}
67
68static inline bool tcf_block_non_null_shared(struct tcf_block *block)
69{
70 return block && block->index;
71}
72
73static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
74{
75 WARN_ON(tcf_block_shared(block));
76 return block->q;
77}
78
79int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
80 struct tcf_result *res, bool compat_mode);
81int tcf_classify_ingress(struct sk_buff *skb,
82 const struct tcf_block *ingress_block,
83 const struct tcf_proto *tp, struct tcf_result *res,
84 bool compat_mode);
85
86#else
87static inline bool tcf_block_shared(struct tcf_block *block)
88{
89 return false;
90}
91
92static inline bool tcf_block_non_null_shared(struct tcf_block *block)
93{
94 return false;
95}
96
97static inline
98int tcf_block_get(struct tcf_block **p_block,
99 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
100 struct netlink_ext_ack *extack)
101{
102 return 0;
103}
104
105static inline
106int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
107 struct tcf_block_ext_info *ei,
108 struct netlink_ext_ack *extack)
109{
110 return 0;
111}
112
113static inline void tcf_block_put(struct tcf_block *block)
114{
115}
116
117static inline
118void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
119 struct tcf_block_ext_info *ei)
120{
121}
122
123static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
124{
125 return NULL;
126}
127
128static inline
129int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
130 void *cb_priv)
131{
132 return 0;
133}
134
135static inline
136void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
137 void *cb_priv)
138{
139}
140
141static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
142 struct tcf_result *res, bool compat_mode)
143{
144 return TC_ACT_UNSPEC;
145}
146
147static inline int tcf_classify_ingress(struct sk_buff *skb,
148 const struct tcf_block *ingress_block,
149 const struct tcf_proto *tp,
150 struct tcf_result *res, bool compat_mode)
151{
152 return TC_ACT_UNSPEC;
153}
154
155#endif
156
157static inline unsigned long
158__cls_set_class(unsigned long *clp, unsigned long cl)
159{
160 return xchg(clp, cl);
161}
162
163static inline void
164__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
165{
166 unsigned long cl;
167
168 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
169 cl = __cls_set_class(&r->class, cl);
170 if (cl)
171 q->ops->cl_ops->unbind_tcf(q, cl);
172}
173
174static inline void
175tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
176{
177 struct Qdisc *q = tp->chain->block->q;
178
179 /* Check q as it is not set for shared blocks. In that case,
180 * setting class is not supported.
181 */
182 if (!q)
183 return;
184 sch_tree_lock(q);
185 __tcf_bind_filter(q, r, base);
186 sch_tree_unlock(q);
187}
188
189static inline void
190__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
191{
192 unsigned long cl;
193
194 if ((cl = __cls_set_class(&r->class, 0)) != 0)
195 q->ops->cl_ops->unbind_tcf(q, cl);
196}
197
198static inline void
199tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
200{
201 struct Qdisc *q = tp->chain->block->q;
202
203 if (!q)
204 return;
205 __tcf_unbind_filter(q, r);
206}
207
208struct tcf_exts {
209#ifdef CONFIG_NET_CLS_ACT
210 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
211 int nr_actions;
212 struct tc_action **actions;
213 struct net *net;
214#endif
215 /* Map to export classifier specific extension TLV types to the
216 * generic extensions API. Unsupported extensions must be set to 0.
217 */
218 int action;
219 int police;
220};
221
222static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
223 int action, int police)
224{
225#ifdef CONFIG_NET_CLS_ACT
226 exts->type = 0;
227 exts->nr_actions = 0;
228 exts->net = net;
229 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
230 GFP_KERNEL);
231 if (!exts->actions)
232 return -ENOMEM;
233#endif
234 exts->action = action;
235 exts->police = police;
236 return 0;
237}
238
239/* Return false if the netns is being destroyed in cleanup_net(). Callers
240 * need to do cleanup synchronously in this case, otherwise may race with
241 * tc_action_net_exit(). Return true for other cases.
242 */
243static inline bool tcf_exts_get_net(struct tcf_exts *exts)
244{
245#ifdef CONFIG_NET_CLS_ACT
246 exts->net = maybe_get_net(exts->net);
247 return exts->net != NULL;
248#else
249 return true;
250#endif
251}
252
253static inline void tcf_exts_put_net(struct tcf_exts *exts)
254{
255#ifdef CONFIG_NET_CLS_ACT
256 if (exts->net)
257 put_net(exts->net);
258#endif
259}
260
261#ifdef CONFIG_NET_CLS_ACT
262#define tcf_exts_for_each_action(i, a, exts) \
263 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
264#else
265#define tcf_exts_for_each_action(i, a, exts) \
266 for (; 0; (void)(i), (void)(a), (void)(exts))
267#endif
268
269static inline void
270tcf_exts_stats_update(const struct tcf_exts *exts,
271 u64 bytes, u64 packets, u64 drops, u64 lastuse,
272 u8 used_hw_stats, bool used_hw_stats_valid)
273{
274#ifdef CONFIG_NET_CLS_ACT
275 int i;
276
277 preempt_disable();
278
279 for (i = 0; i < exts->nr_actions; i++) {
280 struct tc_action *a = exts->actions[i];
281
282 tcf_action_stats_update(a, bytes, packets, drops,
283 lastuse, true);
284 a->used_hw_stats = used_hw_stats;
285 a->used_hw_stats_valid = used_hw_stats_valid;
286 }
287
288 preempt_enable();
289#endif
290}
291
292/**
293 * tcf_exts_has_actions - check if at least one action is present
294 * @exts: tc filter extensions handle
295 *
296 * Returns true if at least one action is present.
297 */
298static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
299{
300#ifdef CONFIG_NET_CLS_ACT
301 return exts->nr_actions;
302#else
303 return false;
304#endif
305}
306
307/**
308 * tcf_exts_exec - execute tc filter extensions
309 * @skb: socket buffer
310 * @exts: tc filter extensions handle
311 * @res: desired result
312 *
313 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
314 * a negative number if the filter must be considered unmatched or
315 * a positive action code (TC_ACT_*) which must be returned to the
316 * underlying layer.
317 */
318static inline int
319tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
320 struct tcf_result *res)
321{
322#ifdef CONFIG_NET_CLS_ACT
323 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
324#endif
325 return TC_ACT_OK;
326}
327
328int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
329 struct nlattr **tb, struct nlattr *rate_tlv,
330 struct tcf_exts *exts, bool ovr, bool rtnl_held,
331 struct netlink_ext_ack *extack);
332void tcf_exts_destroy(struct tcf_exts *exts);
333void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
334int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
335int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
336int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
337
338/**
339 * struct tcf_pkt_info - packet information
340 */
341struct tcf_pkt_info {
342 unsigned char * ptr;
343 int nexthdr;
344};
345
346#ifdef CONFIG_NET_EMATCH
347
348struct tcf_ematch_ops;
349
350/**
351 * struct tcf_ematch - extended match (ematch)
352 *
353 * @matchid: identifier to allow userspace to reidentify a match
354 * @flags: flags specifying attributes and the relation to other matches
355 * @ops: the operations lookup table of the corresponding ematch module
356 * @datalen: length of the ematch specific configuration data
357 * @data: ematch specific data
358 */
359struct tcf_ematch {
360 struct tcf_ematch_ops * ops;
361 unsigned long data;
362 unsigned int datalen;
363 u16 matchid;
364 u16 flags;
365 struct net *net;
366};
367
368static inline int tcf_em_is_container(struct tcf_ematch *em)
369{
370 return !em->ops;
371}
372
373static inline int tcf_em_is_simple(struct tcf_ematch *em)
374{
375 return em->flags & TCF_EM_SIMPLE;
376}
377
378static inline int tcf_em_is_inverted(struct tcf_ematch *em)
379{
380 return em->flags & TCF_EM_INVERT;
381}
382
383static inline int tcf_em_last_match(struct tcf_ematch *em)
384{
385 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
386}
387
388static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
389{
390 if (tcf_em_last_match(em))
391 return 1;
392
393 if (result == 0 && em->flags & TCF_EM_REL_AND)
394 return 1;
395
396 if (result != 0 && em->flags & TCF_EM_REL_OR)
397 return 1;
398
399 return 0;
400}
401
402/**
403 * struct tcf_ematch_tree - ematch tree handle
404 *
405 * @hdr: ematch tree header supplied by userspace
406 * @matches: array of ematches
407 */
408struct tcf_ematch_tree {
409 struct tcf_ematch_tree_hdr hdr;
410 struct tcf_ematch * matches;
411
412};
413
414/**
415 * struct tcf_ematch_ops - ematch module operations
416 *
417 * @kind: identifier (kind) of this ematch module
418 * @datalen: length of expected configuration data (optional)
419 * @change: called during validation (optional)
420 * @match: called during ematch tree evaluation, must return 1/0
421 * @destroy: called during destroyage (optional)
422 * @dump: called during dumping process (optional)
423 * @owner: owner, must be set to THIS_MODULE
424 * @link: link to previous/next ematch module (internal use)
425 */
426struct tcf_ematch_ops {
427 int kind;
428 int datalen;
429 int (*change)(struct net *net, void *,
430 int, struct tcf_ematch *);
431 int (*match)(struct sk_buff *, struct tcf_ematch *,
432 struct tcf_pkt_info *);
433 void (*destroy)(struct tcf_ematch *);
434 int (*dump)(struct sk_buff *, struct tcf_ematch *);
435 struct module *owner;
436 struct list_head link;
437};
438
439int tcf_em_register(struct tcf_ematch_ops *);
440void tcf_em_unregister(struct tcf_ematch_ops *);
441int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
442 struct tcf_ematch_tree *);
443void tcf_em_tree_destroy(struct tcf_ematch_tree *);
444int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
445int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
446 struct tcf_pkt_info *);
447
448/**
449 * tcf_em_tree_match - evaulate an ematch tree
450 *
451 * @skb: socket buffer of the packet in question
452 * @tree: ematch tree to be used for evaluation
453 * @info: packet information examined by classifier
454 *
455 * This function matches @skb against the ematch tree in @tree by going
456 * through all ematches respecting their logic relations returning
457 * as soon as the result is obvious.
458 *
459 * Returns 1 if the ematch tree as-one matches, no ematches are configured
460 * or ematch is not enabled in the kernel, otherwise 0 is returned.
461 */
462static inline int tcf_em_tree_match(struct sk_buff *skb,
463 struct tcf_ematch_tree *tree,
464 struct tcf_pkt_info *info)
465{
466 if (tree->hdr.nmatches)
467 return __tcf_em_tree_match(skb, tree, info);
468 else
469 return 1;
470}
471
472#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
473
474#else /* CONFIG_NET_EMATCH */
475
476struct tcf_ematch_tree {
477};
478
479#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
480#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
481#define tcf_em_tree_dump(skb, t, tlv) (0)
482#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
483
484#endif /* CONFIG_NET_EMATCH */
485
486static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
487{
488 switch (layer) {
489 case TCF_LAYER_LINK:
490 return skb_mac_header(skb);
491 case TCF_LAYER_NETWORK:
492 return skb_network_header(skb);
493 case TCF_LAYER_TRANSPORT:
494 return skb_transport_header(skb);
495 }
496
497 return NULL;
498}
499
500static inline int tcf_valid_offset(const struct sk_buff *skb,
501 const unsigned char *ptr, const int len)
502{
503 return likely((ptr + len) <= skb_tail_pointer(skb) &&
504 ptr >= skb->head &&
505 (ptr <= (ptr + len)));
506}
507
508static inline int
509tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
510 struct netlink_ext_ack *extack)
511{
512 char indev[IFNAMSIZ];
513 struct net_device *dev;
514
515 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
516 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
517 "Interface name too long");
518 return -EINVAL;
519 }
520 dev = __dev_get_by_name(net, indev);
521 if (!dev) {
522 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
523 "Network device not found");
524 return -ENODEV;
525 }
526 return dev->ifindex;
527}
528
529static inline bool
530tcf_match_indev(struct sk_buff *skb, int ifindex)
531{
532 if (!ifindex)
533 return true;
534 if (!skb->skb_iif)
535 return false;
536 return ifindex == skb->skb_iif;
537}
538
539int tc_setup_flow_action(struct flow_action *flow_action,
540 const struct tcf_exts *exts);
541void tc_cleanup_flow_action(struct flow_action *flow_action);
542
543int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
544 void *type_data, bool err_stop, bool rtnl_held);
545int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
546 enum tc_setup_type type, void *type_data, bool err_stop,
547 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
548int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
549 enum tc_setup_type type, void *type_data, bool err_stop,
550 u32 *old_flags, unsigned int *old_in_hw_count,
551 u32 *new_flags, unsigned int *new_in_hw_count,
552 bool rtnl_held);
553int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
554 enum tc_setup_type type, void *type_data, bool err_stop,
555 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
556int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
557 bool add, flow_setup_cb_t *cb,
558 enum tc_setup_type type, void *type_data,
559 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
560unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
561
562#ifdef CONFIG_NET_CLS_ACT
563int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
564 enum flow_block_binder_type binder_type,
565 struct nlattr *block_index_attr,
566 struct netlink_ext_ack *extack);
567void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
568int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
569 struct netlink_ext_ack *extack);
570struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
571 struct sk_buff **to_free, int *ret);
572int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
573#else
574static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
575 enum flow_block_binder_type binder_type,
576 struct nlattr *block_index_attr,
577 struct netlink_ext_ack *extack)
578{
579 return 0;
580}
581
582static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
583{
584}
585
586static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
587 struct netlink_ext_ack *extack)
588{
589 return 0;
590}
591
592static inline struct sk_buff *
593tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
594 struct sk_buff **to_free, int *ret)
595{
596 return skb;
597}
598
599static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
600{
601 return 0;
602}
603#endif
604
605struct tc_cls_u32_knode {
606 struct tcf_exts *exts;
607 struct tcf_result *res;
608 struct tc_u32_sel *sel;
609 u32 handle;
610 u32 val;
611 u32 mask;
612 u32 link_handle;
613 u8 fshift;
614};
615
616struct tc_cls_u32_hnode {
617 u32 handle;
618 u32 prio;
619 unsigned int divisor;
620};
621
622enum tc_clsu32_command {
623 TC_CLSU32_NEW_KNODE,
624 TC_CLSU32_REPLACE_KNODE,
625 TC_CLSU32_DELETE_KNODE,
626 TC_CLSU32_NEW_HNODE,
627 TC_CLSU32_REPLACE_HNODE,
628 TC_CLSU32_DELETE_HNODE,
629};
630
631struct tc_cls_u32_offload {
632 struct flow_cls_common_offload common;
633 /* knode values */
634 enum tc_clsu32_command command;
635 union {
636 struct tc_cls_u32_knode knode;
637 struct tc_cls_u32_hnode hnode;
638 };
639};
640
641static inline bool tc_can_offload(const struct net_device *dev)
642{
643 return dev->features & NETIF_F_HW_TC;
644}
645
646static inline bool tc_can_offload_extack(const struct net_device *dev,
647 struct netlink_ext_ack *extack)
648{
649 bool can = tc_can_offload(dev);
650
651 if (!can)
652 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
653
654 return can;
655}
656
657static inline bool
658tc_cls_can_offload_and_chain0(const struct net_device *dev,
659 struct flow_cls_common_offload *common)
660{
661 if (!tc_can_offload_extack(dev, common->extack))
662 return false;
663 if (common->chain_index) {
664 NL_SET_ERR_MSG(common->extack,
665 "Driver supports only offload of chain 0");
666 return false;
667 }
668 return true;
669}
670
671static inline bool tc_skip_hw(u32 flags)
672{
673 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
674}
675
676static inline bool tc_skip_sw(u32 flags)
677{
678 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
679}
680
681/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
682static inline bool tc_flags_valid(u32 flags)
683{
684 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
685 TCA_CLS_FLAGS_VERBOSE))
686 return false;
687
688 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
689 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
690 return false;
691
692 return true;
693}
694
695static inline bool tc_in_hw(u32 flags)
696{
697 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
698}
699
700static inline void
701tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
702 const struct tcf_proto *tp, u32 flags,
703 struct netlink_ext_ack *extack)
704{
705 cls_common->chain_index = tp->chain->index;
706 cls_common->protocol = tp->protocol;
707 cls_common->prio = tp->prio >> 16;
708 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
709 cls_common->extack = extack;
710}
711
712enum tc_matchall_command {
713 TC_CLSMATCHALL_REPLACE,
714 TC_CLSMATCHALL_DESTROY,
715 TC_CLSMATCHALL_STATS,
716};
717
718struct tc_cls_matchall_offload {
719 struct flow_cls_common_offload common;
720 enum tc_matchall_command command;
721 struct flow_rule *rule;
722 struct flow_stats stats;
723 unsigned long cookie;
724};
725
726enum tc_clsbpf_command {
727 TC_CLSBPF_OFFLOAD,
728 TC_CLSBPF_STATS,
729};
730
731struct tc_cls_bpf_offload {
732 struct flow_cls_common_offload common;
733 enum tc_clsbpf_command command;
734 struct tcf_exts *exts;
735 struct bpf_prog *prog;
736 struct bpf_prog *oldprog;
737 const char *name;
738 bool exts_integrated;
739};
740
741struct tc_mqprio_qopt_offload {
742 /* struct tc_mqprio_qopt must always be the first element */
743 struct tc_mqprio_qopt qopt;
744 u16 mode;
745 u16 shaper;
746 u32 flags;
747 u64 min_rate[TC_QOPT_MAX_QUEUE];
748 u64 max_rate[TC_QOPT_MAX_QUEUE];
749};
750
751/* This structure holds cookie structure that is passed from user
752 * to the kernel for actions and classifiers
753 */
754struct tc_cookie {
755 u8 *data;
756 u32 len;
757 struct rcu_head rcu;
758};
759
760struct tc_qopt_offload_stats {
761 struct gnet_stats_basic_packed *bstats;
762 struct gnet_stats_queue *qstats;
763};
764
765enum tc_mq_command {
766 TC_MQ_CREATE,
767 TC_MQ_DESTROY,
768 TC_MQ_STATS,
769 TC_MQ_GRAFT,
770};
771
772struct tc_mq_opt_offload_graft_params {
773 unsigned long queue;
774 u32 child_handle;
775};
776
777struct tc_mq_qopt_offload {
778 enum tc_mq_command command;
779 u32 handle;
780 union {
781 struct tc_qopt_offload_stats stats;
782 struct tc_mq_opt_offload_graft_params graft_params;
783 };
784};
785
786enum tc_red_command {
787 TC_RED_REPLACE,
788 TC_RED_DESTROY,
789 TC_RED_STATS,
790 TC_RED_XSTATS,
791 TC_RED_GRAFT,
792};
793
794struct tc_red_qopt_offload_params {
795 u32 min;
796 u32 max;
797 u32 probability;
798 u32 limit;
799 bool is_ecn;
800 bool is_harddrop;
801 bool is_nodrop;
802 struct gnet_stats_queue *qstats;
803};
804
805struct tc_red_qopt_offload {
806 enum tc_red_command command;
807 u32 handle;
808 u32 parent;
809 union {
810 struct tc_red_qopt_offload_params set;
811 struct tc_qopt_offload_stats stats;
812 struct red_stats *xstats;
813 u32 child_handle;
814 };
815};
816
817enum tc_gred_command {
818 TC_GRED_REPLACE,
819 TC_GRED_DESTROY,
820 TC_GRED_STATS,
821};
822
823struct tc_gred_vq_qopt_offload_params {
824 bool present;
825 u32 limit;
826 u32 prio;
827 u32 min;
828 u32 max;
829 bool is_ecn;
830 bool is_harddrop;
831 u32 probability;
832 /* Only need backlog, see struct tc_prio_qopt_offload_params */
833 u32 *backlog;
834};
835
836struct tc_gred_qopt_offload_params {
837 bool grio_on;
838 bool wred_on;
839 unsigned int dp_cnt;
840 unsigned int dp_def;
841 struct gnet_stats_queue *qstats;
842 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
843};
844
845struct tc_gred_qopt_offload_stats {
846 struct gnet_stats_basic_packed bstats[MAX_DPs];
847 struct gnet_stats_queue qstats[MAX_DPs];
848 struct red_stats *xstats[MAX_DPs];
849};
850
851struct tc_gred_qopt_offload {
852 enum tc_gred_command command;
853 u32 handle;
854 u32 parent;
855 union {
856 struct tc_gred_qopt_offload_params set;
857 struct tc_gred_qopt_offload_stats stats;
858 };
859};
860
861enum tc_prio_command {
862 TC_PRIO_REPLACE,
863 TC_PRIO_DESTROY,
864 TC_PRIO_STATS,
865 TC_PRIO_GRAFT,
866};
867
868struct tc_prio_qopt_offload_params {
869 int bands;
870 u8 priomap[TC_PRIO_MAX + 1];
871 /* At the point of un-offloading the Qdisc, the reported backlog and
872 * qlen need to be reduced by the portion that is in HW.
873 */
874 struct gnet_stats_queue *qstats;
875};
876
877struct tc_prio_qopt_offload_graft_params {
878 u8 band;
879 u32 child_handle;
880};
881
882struct tc_prio_qopt_offload {
883 enum tc_prio_command command;
884 u32 handle;
885 u32 parent;
886 union {
887 struct tc_prio_qopt_offload_params replace_params;
888 struct tc_qopt_offload_stats stats;
889 struct tc_prio_qopt_offload_graft_params graft_params;
890 };
891};
892
893enum tc_root_command {
894 TC_ROOT_GRAFT,
895};
896
897struct tc_root_qopt_offload {
898 enum tc_root_command command;
899 u32 handle;
900 bool ingress;
901};
902
903enum tc_ets_command {
904 TC_ETS_REPLACE,
905 TC_ETS_DESTROY,
906 TC_ETS_STATS,
907 TC_ETS_GRAFT,
908};
909
910struct tc_ets_qopt_offload_replace_params {
911 unsigned int bands;
912 u8 priomap[TC_PRIO_MAX + 1];
913 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
914 unsigned int weights[TCQ_ETS_MAX_BANDS];
915 struct gnet_stats_queue *qstats;
916};
917
918struct tc_ets_qopt_offload_graft_params {
919 u8 band;
920 u32 child_handle;
921};
922
923struct tc_ets_qopt_offload {
924 enum tc_ets_command command;
925 u32 handle;
926 u32 parent;
927 union {
928 struct tc_ets_qopt_offload_replace_params replace_params;
929 struct tc_qopt_offload_stats stats;
930 struct tc_ets_qopt_offload_graft_params graft_params;
931 };
932};
933
934enum tc_tbf_command {
935 TC_TBF_REPLACE,
936 TC_TBF_DESTROY,
937 TC_TBF_STATS,
938};
939
940struct tc_tbf_qopt_offload_replace_params {
941 struct psched_ratecfg rate;
942 u32 max_size;
943 struct gnet_stats_queue *qstats;
944};
945
946struct tc_tbf_qopt_offload {
947 enum tc_tbf_command command;
948 u32 handle;
949 u32 parent;
950 union {
951 struct tc_tbf_qopt_offload_replace_params replace_params;
952 struct tc_qopt_offload_stats stats;
953 };
954};
955
956enum tc_fifo_command {
957 TC_FIFO_REPLACE,
958 TC_FIFO_DESTROY,
959 TC_FIFO_STATS,
960};
961
962struct tc_fifo_qopt_offload {
963 enum tc_fifo_command command;
964 u32 handle;
965 u32 parent;
966 union {
967 struct tc_qopt_offload_stats stats;
968 };
969};
970
971#endif