Loading...
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);
26void 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);
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);
62int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action,
63 int police, struct tcf_proto *tp, u32 handle, bool used_action_miss);
64
65static inline bool tcf_block_shared(struct tcf_block *block)
66{
67 return block->index;
68}
69
70static inline bool tcf_block_non_null_shared(struct tcf_block *block)
71{
72 return block && block->index;
73}
74
75static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
76{
77 WARN_ON(tcf_block_shared(block));
78 return block->q;
79}
80
81int tcf_classify(struct sk_buff *skb,
82 const struct tcf_block *block,
83 const struct tcf_proto *tp, struct tcf_result *res,
84 bool compat_mode);
85
86static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
87 struct tcf_walker *arg,
88 void *filter)
89{
90 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
91 arg->stop = 1;
92 return false;
93 }
94
95 arg->count++;
96 return true;
97}
98
99#else
100static inline bool tcf_block_shared(struct tcf_block *block)
101{
102 return false;
103}
104
105static inline bool tcf_block_non_null_shared(struct tcf_block *block)
106{
107 return false;
108}
109
110static inline
111int tcf_block_get(struct tcf_block **p_block,
112 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
113 struct netlink_ext_ack *extack)
114{
115 return 0;
116}
117
118static inline
119int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
120 struct tcf_block_ext_info *ei,
121 struct netlink_ext_ack *extack)
122{
123 return 0;
124}
125
126static inline void tcf_block_put(struct tcf_block *block)
127{
128}
129
130static inline
131void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
132 struct tcf_block_ext_info *ei)
133{
134}
135
136static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
137{
138 return NULL;
139}
140
141static inline int tcf_classify(struct sk_buff *skb,
142 const struct tcf_block *block,
143 const struct tcf_proto *tp,
144 struct tcf_result *res, bool compat_mode)
145{
146 return TC_ACT_UNSPEC;
147}
148
149#endif
150
151static inline unsigned long
152__cls_set_class(unsigned long *clp, unsigned long cl)
153{
154 return xchg(clp, cl);
155}
156
157static inline void
158__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
159{
160 unsigned long cl;
161
162 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
163 cl = __cls_set_class(&r->class, cl);
164 if (cl)
165 q->ops->cl_ops->unbind_tcf(q, cl);
166}
167
168static inline void
169tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
170{
171 struct Qdisc *q = tp->chain->block->q;
172
173 /* Check q as it is not set for shared blocks. In that case,
174 * setting class is not supported.
175 */
176 if (!q)
177 return;
178 sch_tree_lock(q);
179 __tcf_bind_filter(q, r, base);
180 sch_tree_unlock(q);
181}
182
183static inline void
184__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
185{
186 unsigned long cl;
187
188 if ((cl = __cls_set_class(&r->class, 0)) != 0)
189 q->ops->cl_ops->unbind_tcf(q, cl);
190}
191
192static inline void
193tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
194{
195 struct Qdisc *q = tp->chain->block->q;
196
197 if (!q)
198 return;
199 __tcf_unbind_filter(q, r);
200}
201
202static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
203 void *q, struct tcf_result *res,
204 unsigned long base)
205{
206 if (res->classid == classid) {
207 if (cl)
208 __tcf_bind_filter(q, res, base);
209 else
210 __tcf_unbind_filter(q, res);
211 }
212}
213
214struct tcf_exts {
215#ifdef CONFIG_NET_CLS_ACT
216 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
217 int nr_actions;
218 struct tc_action **actions;
219 struct net *net;
220 netns_tracker ns_tracker;
221 struct tcf_exts_miss_cookie_node *miss_cookie_node;
222#endif
223 /* Map to export classifier specific extension TLV types to the
224 * generic extensions API. Unsupported extensions must be set to 0.
225 */
226 int action;
227 int police;
228};
229
230static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
231 int action, int police)
232{
233#ifdef CONFIG_NET_CLS
234 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false);
235#else
236 return -EOPNOTSUPP;
237#endif
238}
239
240/* Return false if the netns is being destroyed in cleanup_net(). Callers
241 * need to do cleanup synchronously in this case, otherwise may race with
242 * tc_action_net_exit(). Return true for other cases.
243 */
244static inline bool tcf_exts_get_net(struct tcf_exts *exts)
245{
246#ifdef CONFIG_NET_CLS_ACT
247 exts->net = maybe_get_net(exts->net);
248 if (exts->net)
249 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
250 return exts->net != NULL;
251#else
252 return true;
253#endif
254}
255
256static inline void tcf_exts_put_net(struct tcf_exts *exts)
257{
258#ifdef CONFIG_NET_CLS_ACT
259 if (exts->net)
260 put_net_track(exts->net, &exts->ns_tracker);
261#endif
262}
263
264#ifdef CONFIG_NET_CLS_ACT
265#define tcf_exts_for_each_action(i, a, exts) \
266 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
267#else
268#define tcf_exts_for_each_action(i, a, exts) \
269 for (; 0; (void)(i), (void)(a), (void)(exts))
270#endif
271
272#define tcf_act_for_each_action(i, a, actions) \
273 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
274
275static inline bool tc_act_in_hw(struct tc_action *act)
276{
277 return !!act->in_hw_count;
278}
279
280static inline void
281tcf_exts_hw_stats_update(const struct tcf_exts *exts,
282 struct flow_stats *stats,
283 bool use_act_stats)
284{
285#ifdef CONFIG_NET_CLS_ACT
286 int i;
287
288 for (i = 0; i < exts->nr_actions; i++) {
289 struct tc_action *a = exts->actions[i];
290
291 if (use_act_stats || tc_act_in_hw(a)) {
292 if (!tcf_action_update_hw_stats(a))
293 continue;
294 }
295
296 preempt_disable();
297 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops,
298 stats->lastused, true);
299 preempt_enable();
300
301 a->used_hw_stats = stats->used_hw_stats;
302 a->used_hw_stats_valid = stats->used_hw_stats_valid;
303 }
304#endif
305}
306
307/**
308 * tcf_exts_has_actions - check if at least one action is present
309 * @exts: tc filter extensions handle
310 *
311 * Returns true if at least one action is present.
312 */
313static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
314{
315#ifdef CONFIG_NET_CLS_ACT
316 return exts->nr_actions;
317#else
318 return false;
319#endif
320}
321
322/**
323 * tcf_exts_exec - execute tc filter extensions
324 * @skb: socket buffer
325 * @exts: tc filter extensions handle
326 * @res: desired result
327 *
328 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
329 * a negative number if the filter must be considered unmatched or
330 * a positive action code (TC_ACT_*) which must be returned to the
331 * underlying layer.
332 */
333static inline int
334tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
335 struct tcf_result *res)
336{
337#ifdef CONFIG_NET_CLS_ACT
338 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
339#endif
340 return TC_ACT_OK;
341}
342
343static inline int
344tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
345 struct tcf_result *res)
346{
347#ifdef CONFIG_NET_CLS_ACT
348 return tcf_action_exec(skb, exts->actions + act_index,
349 exts->nr_actions - act_index, res);
350#else
351 return TC_ACT_OK;
352#endif
353}
354
355int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
356 struct nlattr **tb, struct nlattr *rate_tlv,
357 struct tcf_exts *exts, u32 flags,
358 struct netlink_ext_ack *extack);
359int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
360 struct nlattr *rate_tlv, struct tcf_exts *exts,
361 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
362void tcf_exts_destroy(struct tcf_exts *exts);
363void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
364int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
365int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
366int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
367
368/**
369 * struct tcf_pkt_info - packet information
370 *
371 * @ptr: start of the pkt data
372 * @nexthdr: offset of the next header
373 */
374struct tcf_pkt_info {
375 unsigned char * ptr;
376 int nexthdr;
377};
378
379#ifdef CONFIG_NET_EMATCH
380
381struct tcf_ematch_ops;
382
383/**
384 * struct tcf_ematch - extended match (ematch)
385 *
386 * @matchid: identifier to allow userspace to reidentify a match
387 * @flags: flags specifying attributes and the relation to other matches
388 * @ops: the operations lookup table of the corresponding ematch module
389 * @datalen: length of the ematch specific configuration data
390 * @data: ematch specific data
391 * @net: the network namespace
392 */
393struct tcf_ematch {
394 struct tcf_ematch_ops * ops;
395 unsigned long data;
396 unsigned int datalen;
397 u16 matchid;
398 u16 flags;
399 struct net *net;
400};
401
402static inline int tcf_em_is_container(struct tcf_ematch *em)
403{
404 return !em->ops;
405}
406
407static inline int tcf_em_is_simple(struct tcf_ematch *em)
408{
409 return em->flags & TCF_EM_SIMPLE;
410}
411
412static inline int tcf_em_is_inverted(struct tcf_ematch *em)
413{
414 return em->flags & TCF_EM_INVERT;
415}
416
417static inline int tcf_em_last_match(struct tcf_ematch *em)
418{
419 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
420}
421
422static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
423{
424 if (tcf_em_last_match(em))
425 return 1;
426
427 if (result == 0 && em->flags & TCF_EM_REL_AND)
428 return 1;
429
430 if (result != 0 && em->flags & TCF_EM_REL_OR)
431 return 1;
432
433 return 0;
434}
435
436/**
437 * struct tcf_ematch_tree - ematch tree handle
438 *
439 * @hdr: ematch tree header supplied by userspace
440 * @matches: array of ematches
441 */
442struct tcf_ematch_tree {
443 struct tcf_ematch_tree_hdr hdr;
444 struct tcf_ematch * matches;
445
446};
447
448/**
449 * struct tcf_ematch_ops - ematch module operations
450 *
451 * @kind: identifier (kind) of this ematch module
452 * @datalen: length of expected configuration data (optional)
453 * @change: called during validation (optional)
454 * @match: called during ematch tree evaluation, must return 1/0
455 * @destroy: called during destroyage (optional)
456 * @dump: called during dumping process (optional)
457 * @owner: owner, must be set to THIS_MODULE
458 * @link: link to previous/next ematch module (internal use)
459 */
460struct tcf_ematch_ops {
461 int kind;
462 int datalen;
463 int (*change)(struct net *net, void *,
464 int, struct tcf_ematch *);
465 int (*match)(struct sk_buff *, struct tcf_ematch *,
466 struct tcf_pkt_info *);
467 void (*destroy)(struct tcf_ematch *);
468 int (*dump)(struct sk_buff *, struct tcf_ematch *);
469 struct module *owner;
470 struct list_head link;
471};
472
473int tcf_em_register(struct tcf_ematch_ops *);
474void tcf_em_unregister(struct tcf_ematch_ops *);
475int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
476 struct tcf_ematch_tree *);
477void tcf_em_tree_destroy(struct tcf_ematch_tree *);
478int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
479int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
480 struct tcf_pkt_info *);
481
482/**
483 * tcf_em_tree_match - evaulate an ematch tree
484 *
485 * @skb: socket buffer of the packet in question
486 * @tree: ematch tree to be used for evaluation
487 * @info: packet information examined by classifier
488 *
489 * This function matches @skb against the ematch tree in @tree by going
490 * through all ematches respecting their logic relations returning
491 * as soon as the result is obvious.
492 *
493 * Returns 1 if the ematch tree as-one matches, no ematches are configured
494 * or ematch is not enabled in the kernel, otherwise 0 is returned.
495 */
496static inline int tcf_em_tree_match(struct sk_buff *skb,
497 struct tcf_ematch_tree *tree,
498 struct tcf_pkt_info *info)
499{
500 if (tree->hdr.nmatches)
501 return __tcf_em_tree_match(skb, tree, info);
502 else
503 return 1;
504}
505
506#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
507
508#else /* CONFIG_NET_EMATCH */
509
510struct tcf_ematch_tree {
511};
512
513#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
514#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
515#define tcf_em_tree_dump(skb, t, tlv) (0)
516#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
517
518#endif /* CONFIG_NET_EMATCH */
519
520static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
521{
522 switch (layer) {
523 case TCF_LAYER_LINK:
524 return skb_mac_header(skb);
525 case TCF_LAYER_NETWORK:
526 return skb_network_header(skb);
527 case TCF_LAYER_TRANSPORT:
528 return skb_transport_header(skb);
529 }
530
531 return NULL;
532}
533
534static inline int tcf_valid_offset(const struct sk_buff *skb,
535 const unsigned char *ptr, const int len)
536{
537 return likely((ptr + len) <= skb_tail_pointer(skb) &&
538 ptr >= skb->head &&
539 (ptr <= (ptr + len)));
540}
541
542static inline int
543tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
544 struct netlink_ext_ack *extack)
545{
546 char indev[IFNAMSIZ];
547 struct net_device *dev;
548
549 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
550 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
551 "Interface name too long");
552 return -EINVAL;
553 }
554 dev = __dev_get_by_name(net, indev);
555 if (!dev) {
556 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
557 "Network device not found");
558 return -ENODEV;
559 }
560 return dev->ifindex;
561}
562
563static inline bool
564tcf_match_indev(struct sk_buff *skb, int ifindex)
565{
566 if (!ifindex)
567 return true;
568 if (!skb->skb_iif)
569 return false;
570 return ifindex == skb->skb_iif;
571}
572
573int tc_setup_offload_action(struct flow_action *flow_action,
574 const struct tcf_exts *exts,
575 struct netlink_ext_ack *extack);
576void tc_cleanup_offload_action(struct flow_action *flow_action);
577int tc_setup_action(struct flow_action *flow_action,
578 struct tc_action *actions[],
579 u32 miss_cookie_base,
580 struct netlink_ext_ack *extack);
581
582int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
583 void *type_data, bool err_stop, bool rtnl_held);
584int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
585 enum tc_setup_type type, void *type_data, bool err_stop,
586 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
587int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
588 enum tc_setup_type type, void *type_data, bool err_stop,
589 u32 *old_flags, unsigned int *old_in_hw_count,
590 u32 *new_flags, unsigned int *new_in_hw_count,
591 bool rtnl_held);
592int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
593 enum tc_setup_type type, void *type_data, bool err_stop,
594 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
595int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
596 bool add, flow_setup_cb_t *cb,
597 enum tc_setup_type type, void *type_data,
598 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
599unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
600
601#ifdef CONFIG_NET_CLS_ACT
602int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
603 enum flow_block_binder_type binder_type,
604 struct nlattr *block_index_attr,
605 struct netlink_ext_ack *extack);
606void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
607int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
608 struct netlink_ext_ack *extack);
609struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
610 struct sk_buff **to_free, int *ret);
611int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
612#else
613static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
614 enum flow_block_binder_type binder_type,
615 struct nlattr *block_index_attr,
616 struct netlink_ext_ack *extack)
617{
618 return 0;
619}
620
621static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
622{
623}
624
625static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
626 struct netlink_ext_ack *extack)
627{
628 return 0;
629}
630
631static inline struct sk_buff *
632tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
633 struct sk_buff **to_free, int *ret)
634{
635 return skb;
636}
637
638static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
639{
640 return 0;
641}
642#endif
643
644struct tc_cls_u32_knode {
645 struct tcf_exts *exts;
646 struct tcf_result *res;
647 struct tc_u32_sel *sel;
648 u32 handle;
649 u32 val;
650 u32 mask;
651 u32 link_handle;
652 u8 fshift;
653};
654
655struct tc_cls_u32_hnode {
656 u32 handle;
657 u32 prio;
658 unsigned int divisor;
659};
660
661enum tc_clsu32_command {
662 TC_CLSU32_NEW_KNODE,
663 TC_CLSU32_REPLACE_KNODE,
664 TC_CLSU32_DELETE_KNODE,
665 TC_CLSU32_NEW_HNODE,
666 TC_CLSU32_REPLACE_HNODE,
667 TC_CLSU32_DELETE_HNODE,
668};
669
670struct tc_cls_u32_offload {
671 struct flow_cls_common_offload common;
672 /* knode values */
673 enum tc_clsu32_command command;
674 union {
675 struct tc_cls_u32_knode knode;
676 struct tc_cls_u32_hnode hnode;
677 };
678};
679
680static inline bool tc_can_offload(const struct net_device *dev)
681{
682 return dev->features & NETIF_F_HW_TC;
683}
684
685static inline bool tc_can_offload_extack(const struct net_device *dev,
686 struct netlink_ext_ack *extack)
687{
688 bool can = tc_can_offload(dev);
689
690 if (!can)
691 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
692
693 return can;
694}
695
696static inline bool
697tc_cls_can_offload_and_chain0(const struct net_device *dev,
698 struct flow_cls_common_offload *common)
699{
700 if (!tc_can_offload_extack(dev, common->extack))
701 return false;
702 if (common->chain_index) {
703 NL_SET_ERR_MSG(common->extack,
704 "Driver supports only offload of chain 0");
705 return false;
706 }
707 return true;
708}
709
710static inline bool tc_skip_hw(u32 flags)
711{
712 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
713}
714
715static inline bool tc_skip_sw(u32 flags)
716{
717 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
718}
719
720/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
721static inline bool tc_flags_valid(u32 flags)
722{
723 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
724 TCA_CLS_FLAGS_VERBOSE))
725 return false;
726
727 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
728 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
729 return false;
730
731 return true;
732}
733
734static inline bool tc_in_hw(u32 flags)
735{
736 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
737}
738
739static inline void
740tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
741 const struct tcf_proto *tp, u32 flags,
742 struct netlink_ext_ack *extack)
743{
744 cls_common->chain_index = tp->chain->index;
745 cls_common->protocol = tp->protocol;
746 cls_common->prio = tp->prio >> 16;
747 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
748 cls_common->extack = extack;
749}
750
751#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
752static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
753{
754 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
755
756 if (tc_skb_ext)
757 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
758 return tc_skb_ext;
759}
760#endif
761
762enum tc_matchall_command {
763 TC_CLSMATCHALL_REPLACE,
764 TC_CLSMATCHALL_DESTROY,
765 TC_CLSMATCHALL_STATS,
766};
767
768struct tc_cls_matchall_offload {
769 struct flow_cls_common_offload common;
770 enum tc_matchall_command command;
771 struct flow_rule *rule;
772 struct flow_stats stats;
773 bool use_act_stats;
774 unsigned long cookie;
775};
776
777enum tc_clsbpf_command {
778 TC_CLSBPF_OFFLOAD,
779 TC_CLSBPF_STATS,
780};
781
782struct tc_cls_bpf_offload {
783 struct flow_cls_common_offload common;
784 enum tc_clsbpf_command command;
785 struct tcf_exts *exts;
786 struct bpf_prog *prog;
787 struct bpf_prog *oldprog;
788 const char *name;
789 bool exts_integrated;
790};
791
792/* This structure holds cookie structure that is passed from user
793 * to the kernel for actions and classifiers
794 */
795struct tc_cookie {
796 u8 *data;
797 u32 len;
798 struct rcu_head rcu;
799};
800
801struct tc_qopt_offload_stats {
802 struct gnet_stats_basic_sync *bstats;
803 struct gnet_stats_queue *qstats;
804};
805
806enum tc_mq_command {
807 TC_MQ_CREATE,
808 TC_MQ_DESTROY,
809 TC_MQ_STATS,
810 TC_MQ_GRAFT,
811};
812
813struct tc_mq_opt_offload_graft_params {
814 unsigned long queue;
815 u32 child_handle;
816};
817
818struct tc_mq_qopt_offload {
819 enum tc_mq_command command;
820 u32 handle;
821 union {
822 struct tc_qopt_offload_stats stats;
823 struct tc_mq_opt_offload_graft_params graft_params;
824 };
825};
826
827enum tc_htb_command {
828 /* Root */
829 TC_HTB_CREATE, /* Initialize HTB offload. */
830 TC_HTB_DESTROY, /* Destroy HTB offload. */
831
832 /* Classes */
833 /* Allocate qid and create leaf. */
834 TC_HTB_LEAF_ALLOC_QUEUE,
835 /* Convert leaf to inner, preserve and return qid, create new leaf. */
836 TC_HTB_LEAF_TO_INNER,
837 /* Delete leaf, while siblings remain. */
838 TC_HTB_LEAF_DEL,
839 /* Delete leaf, convert parent to leaf, preserving qid. */
840 TC_HTB_LEAF_DEL_LAST,
841 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
842 TC_HTB_LEAF_DEL_LAST_FORCE,
843 /* Modify parameters of a node. */
844 TC_HTB_NODE_MODIFY,
845
846 /* Class qdisc */
847 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
848};
849
850struct tc_htb_qopt_offload {
851 struct netlink_ext_ack *extack;
852 enum tc_htb_command command;
853 u32 parent_classid;
854 u16 classid;
855 u16 qid;
856 u32 quantum;
857 u64 rate;
858 u64 ceil;
859 u8 prio;
860};
861
862#define TC_HTB_CLASSID_ROOT U32_MAX
863
864enum tc_red_command {
865 TC_RED_REPLACE,
866 TC_RED_DESTROY,
867 TC_RED_STATS,
868 TC_RED_XSTATS,
869 TC_RED_GRAFT,
870};
871
872struct tc_red_qopt_offload_params {
873 u32 min;
874 u32 max;
875 u32 probability;
876 u32 limit;
877 bool is_ecn;
878 bool is_harddrop;
879 bool is_nodrop;
880 struct gnet_stats_queue *qstats;
881};
882
883struct tc_red_qopt_offload {
884 enum tc_red_command command;
885 u32 handle;
886 u32 parent;
887 union {
888 struct tc_red_qopt_offload_params set;
889 struct tc_qopt_offload_stats stats;
890 struct red_stats *xstats;
891 u32 child_handle;
892 };
893};
894
895enum tc_gred_command {
896 TC_GRED_REPLACE,
897 TC_GRED_DESTROY,
898 TC_GRED_STATS,
899};
900
901struct tc_gred_vq_qopt_offload_params {
902 bool present;
903 u32 limit;
904 u32 prio;
905 u32 min;
906 u32 max;
907 bool is_ecn;
908 bool is_harddrop;
909 u32 probability;
910 /* Only need backlog, see struct tc_prio_qopt_offload_params */
911 u32 *backlog;
912};
913
914struct tc_gred_qopt_offload_params {
915 bool grio_on;
916 bool wred_on;
917 unsigned int dp_cnt;
918 unsigned int dp_def;
919 struct gnet_stats_queue *qstats;
920 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
921};
922
923struct tc_gred_qopt_offload_stats {
924 struct gnet_stats_basic_sync bstats[MAX_DPs];
925 struct gnet_stats_queue qstats[MAX_DPs];
926 struct red_stats *xstats[MAX_DPs];
927};
928
929struct tc_gred_qopt_offload {
930 enum tc_gred_command command;
931 u32 handle;
932 u32 parent;
933 union {
934 struct tc_gred_qopt_offload_params set;
935 struct tc_gred_qopt_offload_stats stats;
936 };
937};
938
939enum tc_prio_command {
940 TC_PRIO_REPLACE,
941 TC_PRIO_DESTROY,
942 TC_PRIO_STATS,
943 TC_PRIO_GRAFT,
944};
945
946struct tc_prio_qopt_offload_params {
947 int bands;
948 u8 priomap[TC_PRIO_MAX + 1];
949 /* At the point of un-offloading the Qdisc, the reported backlog and
950 * qlen need to be reduced by the portion that is in HW.
951 */
952 struct gnet_stats_queue *qstats;
953};
954
955struct tc_prio_qopt_offload_graft_params {
956 u8 band;
957 u32 child_handle;
958};
959
960struct tc_prio_qopt_offload {
961 enum tc_prio_command command;
962 u32 handle;
963 u32 parent;
964 union {
965 struct tc_prio_qopt_offload_params replace_params;
966 struct tc_qopt_offload_stats stats;
967 struct tc_prio_qopt_offload_graft_params graft_params;
968 };
969};
970
971enum tc_root_command {
972 TC_ROOT_GRAFT,
973};
974
975struct tc_root_qopt_offload {
976 enum tc_root_command command;
977 u32 handle;
978 bool ingress;
979};
980
981enum tc_ets_command {
982 TC_ETS_REPLACE,
983 TC_ETS_DESTROY,
984 TC_ETS_STATS,
985 TC_ETS_GRAFT,
986};
987
988struct tc_ets_qopt_offload_replace_params {
989 unsigned int bands;
990 u8 priomap[TC_PRIO_MAX + 1];
991 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
992 unsigned int weights[TCQ_ETS_MAX_BANDS];
993 struct gnet_stats_queue *qstats;
994};
995
996struct tc_ets_qopt_offload_graft_params {
997 u8 band;
998 u32 child_handle;
999};
1000
1001struct tc_ets_qopt_offload {
1002 enum tc_ets_command command;
1003 u32 handle;
1004 u32 parent;
1005 union {
1006 struct tc_ets_qopt_offload_replace_params replace_params;
1007 struct tc_qopt_offload_stats stats;
1008 struct tc_ets_qopt_offload_graft_params graft_params;
1009 };
1010};
1011
1012enum tc_tbf_command {
1013 TC_TBF_REPLACE,
1014 TC_TBF_DESTROY,
1015 TC_TBF_STATS,
1016 TC_TBF_GRAFT,
1017};
1018
1019struct tc_tbf_qopt_offload_replace_params {
1020 struct psched_ratecfg rate;
1021 u32 max_size;
1022 struct gnet_stats_queue *qstats;
1023};
1024
1025struct tc_tbf_qopt_offload {
1026 enum tc_tbf_command command;
1027 u32 handle;
1028 u32 parent;
1029 union {
1030 struct tc_tbf_qopt_offload_replace_params replace_params;
1031 struct tc_qopt_offload_stats stats;
1032 u32 child_handle;
1033 };
1034};
1035
1036enum tc_fifo_command {
1037 TC_FIFO_REPLACE,
1038 TC_FIFO_DESTROY,
1039 TC_FIFO_STATS,
1040};
1041
1042struct tc_fifo_qopt_offload {
1043 enum tc_fifo_command command;
1044 u32 handle;
1045 u32 parent;
1046 union {
1047 struct tc_qopt_offload_stats stats;
1048 };
1049};
1050
1051#ifdef CONFIG_NET_CLS_ACT
1052DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1053void tc_skb_ext_tc_enable(void);
1054void tc_skb_ext_tc_disable(void);
1055#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1056#else /* CONFIG_NET_CLS_ACT */
1057static inline void tc_skb_ext_tc_enable(void) { }
1058static inline void tc_skb_ext_tc_disable(void) { }
1059#define tc_skb_ext_tc_enabled() false
1060#endif
1061
1062#endif