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 tcf_set_drop_reason(struct tcf_result *res,
158 enum skb_drop_reason reason)
159{
160 res->drop_reason = reason;
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(clp: &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(clp: &r->class, cl: 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
208static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
209 void *q, struct tcf_result *res,
210 unsigned long base)
211{
212 if (res->classid == classid) {
213 if (cl)
214 __tcf_bind_filter(q, r: res, base);
215 else
216 __tcf_unbind_filter(q, r: res);
217 }
218}
219
220struct tcf_exts {
221#ifdef CONFIG_NET_CLS_ACT
222 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
223 int nr_actions;
224 struct tc_action **actions;
225 struct net *net;
226 netns_tracker ns_tracker;
227 struct tcf_exts_miss_cookie_node *miss_cookie_node;
228#endif
229 /* Map to export classifier specific extension TLV types to the
230 * generic extensions API. Unsupported extensions must be set to 0.
231 */
232 int action;
233 int police;
234};
235
236static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
237 int action, int police)
238{
239#ifdef CONFIG_NET_CLS
240 return tcf_exts_init_ex(exts, net, action, police, NULL, handle: 0, used_action_miss: false);
241#else
242 return -EOPNOTSUPP;
243#endif
244}
245
246/* Return false if the netns is being destroyed in cleanup_net(). Callers
247 * need to do cleanup synchronously in this case, otherwise may race with
248 * tc_action_net_exit(). Return true for other cases.
249 */
250static inline bool tcf_exts_get_net(struct tcf_exts *exts)
251{
252#ifdef CONFIG_NET_CLS_ACT
253 exts->net = maybe_get_net(net: exts->net);
254 if (exts->net)
255 netns_tracker_alloc(net: exts->net, tracker: &exts->ns_tracker, GFP_KERNEL);
256 return exts->net != NULL;
257#else
258 return true;
259#endif
260}
261
262static inline void tcf_exts_put_net(struct tcf_exts *exts)
263{
264#ifdef CONFIG_NET_CLS_ACT
265 if (exts->net)
266 put_net_track(net: exts->net, tracker: &exts->ns_tracker);
267#endif
268}
269
270#ifdef CONFIG_NET_CLS_ACT
271#define tcf_exts_for_each_action(i, a, exts) \
272 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
273#else
274#define tcf_exts_for_each_action(i, a, exts) \
275 for (; 0; (void)(i), (void)(a), (void)(exts))
276#endif
277
278#define tcf_act_for_each_action(i, a, actions) \
279 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
280
281static inline bool tc_act_in_hw(struct tc_action *act)
282{
283 return !!act->in_hw_count;
284}
285
286static inline void
287tcf_exts_hw_stats_update(const struct tcf_exts *exts,
288 struct flow_stats *stats,
289 bool use_act_stats)
290{
291#ifdef CONFIG_NET_CLS_ACT
292 int i;
293
294 for (i = 0; i < exts->nr_actions; i++) {
295 struct tc_action *a = exts->actions[i];
296
297 if (use_act_stats || tc_act_in_hw(act: a)) {
298 if (!tcf_action_update_hw_stats(action: a))
299 continue;
300 }
301
302 preempt_disable();
303 tcf_action_stats_update(a, bytes: stats->bytes, packets: stats->pkts, drops: stats->drops,
304 lastuse: stats->lastused, hw: true);
305 preempt_enable();
306
307 a->used_hw_stats = stats->used_hw_stats;
308 a->used_hw_stats_valid = stats->used_hw_stats_valid;
309 }
310#endif
311}
312
313/**
314 * tcf_exts_has_actions - check if at least one action is present
315 * @exts: tc filter extensions handle
316 *
317 * Returns true if at least one action is present.
318 */
319static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
320{
321#ifdef CONFIG_NET_CLS_ACT
322 return exts->nr_actions;
323#else
324 return false;
325#endif
326}
327
328/**
329 * tcf_exts_exec - execute tc filter extensions
330 * @skb: socket buffer
331 * @exts: tc filter extensions handle
332 * @res: desired result
333 *
334 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
335 * a negative number if the filter must be considered unmatched or
336 * a positive action code (TC_ACT_*) which must be returned to the
337 * underlying layer.
338 */
339static inline int
340tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
341 struct tcf_result *res)
342{
343#ifdef CONFIG_NET_CLS_ACT
344 return tcf_action_exec(skb, actions: exts->actions, nr_actions: exts->nr_actions, res);
345#endif
346 return TC_ACT_OK;
347}
348
349static inline int
350tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
351 struct tcf_result *res)
352{
353#ifdef CONFIG_NET_CLS_ACT
354 return tcf_action_exec(skb, actions: exts->actions + act_index,
355 nr_actions: exts->nr_actions - act_index, res);
356#else
357 return TC_ACT_OK;
358#endif
359}
360
361int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
362 struct nlattr **tb, struct nlattr *rate_tlv,
363 struct tcf_exts *exts, u32 flags,
364 struct netlink_ext_ack *extack);
365int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
366 struct nlattr *rate_tlv, struct tcf_exts *exts,
367 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
368void tcf_exts_destroy(struct tcf_exts *exts);
369void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
370int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
371int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
372int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
373
374/**
375 * struct tcf_pkt_info - packet information
376 *
377 * @ptr: start of the pkt data
378 * @nexthdr: offset of the next header
379 */
380struct tcf_pkt_info {
381 unsigned char * ptr;
382 int nexthdr;
383};
384
385#ifdef CONFIG_NET_EMATCH
386
387struct tcf_ematch_ops;
388
389/**
390 * struct tcf_ematch - extended match (ematch)
391 *
392 * @matchid: identifier to allow userspace to reidentify a match
393 * @flags: flags specifying attributes and the relation to other matches
394 * @ops: the operations lookup table of the corresponding ematch module
395 * @datalen: length of the ematch specific configuration data
396 * @data: ematch specific data
397 * @net: the network namespace
398 */
399struct tcf_ematch {
400 struct tcf_ematch_ops * ops;
401 unsigned long data;
402 unsigned int datalen;
403 u16 matchid;
404 u16 flags;
405 struct net *net;
406};
407
408static inline int tcf_em_is_container(struct tcf_ematch *em)
409{
410 return !em->ops;
411}
412
413static inline int tcf_em_is_simple(struct tcf_ematch *em)
414{
415 return em->flags & TCF_EM_SIMPLE;
416}
417
418static inline int tcf_em_is_inverted(struct tcf_ematch *em)
419{
420 return em->flags & TCF_EM_INVERT;
421}
422
423static inline int tcf_em_last_match(struct tcf_ematch *em)
424{
425 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
426}
427
428static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
429{
430 if (tcf_em_last_match(em))
431 return 1;
432
433 if (result == 0 && em->flags & TCF_EM_REL_AND)
434 return 1;
435
436 if (result != 0 && em->flags & TCF_EM_REL_OR)
437 return 1;
438
439 return 0;
440}
441
442/**
443 * struct tcf_ematch_tree - ematch tree handle
444 *
445 * @hdr: ematch tree header supplied by userspace
446 * @matches: array of ematches
447 */
448struct tcf_ematch_tree {
449 struct tcf_ematch_tree_hdr hdr;
450 struct tcf_ematch * matches;
451
452};
453
454/**
455 * struct tcf_ematch_ops - ematch module operations
456 *
457 * @kind: identifier (kind) of this ematch module
458 * @datalen: length of expected configuration data (optional)
459 * @change: called during validation (optional)
460 * @match: called during ematch tree evaluation, must return 1/0
461 * @destroy: called during destroyage (optional)
462 * @dump: called during dumping process (optional)
463 * @owner: owner, must be set to THIS_MODULE
464 * @link: link to previous/next ematch module (internal use)
465 */
466struct tcf_ematch_ops {
467 int kind;
468 int datalen;
469 int (*change)(struct net *net, void *,
470 int, struct tcf_ematch *);
471 int (*match)(struct sk_buff *, struct tcf_ematch *,
472 struct tcf_pkt_info *);
473 void (*destroy)(struct tcf_ematch *);
474 int (*dump)(struct sk_buff *, struct tcf_ematch *);
475 struct module *owner;
476 struct list_head link;
477};
478
479int tcf_em_register(struct tcf_ematch_ops *);
480void tcf_em_unregister(struct tcf_ematch_ops *);
481int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
482 struct tcf_ematch_tree *);
483void tcf_em_tree_destroy(struct tcf_ematch_tree *);
484int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
485int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
486 struct tcf_pkt_info *);
487
488/**
489 * tcf_em_tree_match - evaulate an ematch tree
490 *
491 * @skb: socket buffer of the packet in question
492 * @tree: ematch tree to be used for evaluation
493 * @info: packet information examined by classifier
494 *
495 * This function matches @skb against the ematch tree in @tree by going
496 * through all ematches respecting their logic relations returning
497 * as soon as the result is obvious.
498 *
499 * Returns 1 if the ematch tree as-one matches, no ematches are configured
500 * or ematch is not enabled in the kernel, otherwise 0 is returned.
501 */
502static inline int tcf_em_tree_match(struct sk_buff *skb,
503 struct tcf_ematch_tree *tree,
504 struct tcf_pkt_info *info)
505{
506 if (tree->hdr.nmatches)
507 return __tcf_em_tree_match(skb, tree, info);
508 else
509 return 1;
510}
511
512#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
513
514#else /* CONFIG_NET_EMATCH */
515
516struct tcf_ematch_tree {
517};
518
519#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
520#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
521#define tcf_em_tree_dump(skb, t, tlv) (0)
522#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
523
524#endif /* CONFIG_NET_EMATCH */
525
526static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
527{
528 switch (layer) {
529 case TCF_LAYER_LINK:
530 return skb_mac_header(skb);
531 case TCF_LAYER_NETWORK:
532 return skb_network_header(skb);
533 case TCF_LAYER_TRANSPORT:
534 return skb_transport_header(skb);
535 }
536
537 return NULL;
538}
539
540static inline int tcf_valid_offset(const struct sk_buff *skb,
541 const unsigned char *ptr, const int len)
542{
543 return likely((ptr + len) <= skb_tail_pointer(skb) &&
544 ptr >= skb->head &&
545 (ptr <= (ptr + len)));
546}
547
548static inline int
549tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
550 struct netlink_ext_ack *extack)
551{
552 char indev[IFNAMSIZ];
553 struct net_device *dev;
554
555 if (nla_strscpy(dst: indev, nla: indev_tlv, IFNAMSIZ) < 0) {
556 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
557 "Interface name too long");
558 return -EINVAL;
559 }
560 dev = __dev_get_by_name(net, name: indev);
561 if (!dev) {
562 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
563 "Network device not found");
564 return -ENODEV;
565 }
566 return dev->ifindex;
567}
568
569static inline bool
570tcf_match_indev(struct sk_buff *skb, int ifindex)
571{
572 if (!ifindex)
573 return true;
574 if (!skb->skb_iif)
575 return false;
576 return ifindex == skb->skb_iif;
577}
578
579int tc_setup_offload_action(struct flow_action *flow_action,
580 const struct tcf_exts *exts,
581 struct netlink_ext_ack *extack);
582void tc_cleanup_offload_action(struct flow_action *flow_action);
583int tc_setup_action(struct flow_action *flow_action,
584 struct tc_action *actions[],
585 u32 miss_cookie_base,
586 struct netlink_ext_ack *extack);
587
588int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
589 void *type_data, bool err_stop, bool rtnl_held);
590int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
591 enum tc_setup_type type, void *type_data, bool err_stop,
592 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
593int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
594 enum tc_setup_type type, void *type_data, bool err_stop,
595 u32 *old_flags, unsigned int *old_in_hw_count,
596 u32 *new_flags, unsigned int *new_in_hw_count,
597 bool rtnl_held);
598int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
599 enum tc_setup_type type, void *type_data, bool err_stop,
600 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
601int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
602 bool add, flow_setup_cb_t *cb,
603 enum tc_setup_type type, void *type_data,
604 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
605unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
606
607#ifdef CONFIG_NET_CLS_ACT
608int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
609 enum flow_block_binder_type binder_type,
610 struct nlattr *block_index_attr,
611 struct netlink_ext_ack *extack);
612void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
613int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
614 struct netlink_ext_ack *extack);
615struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
616 struct sk_buff **to_free, int *ret);
617int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
618#else
619static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
620 enum flow_block_binder_type binder_type,
621 struct nlattr *block_index_attr,
622 struct netlink_ext_ack *extack)
623{
624 return 0;
625}
626
627static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
628{
629}
630
631static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
632 struct netlink_ext_ack *extack)
633{
634 return 0;
635}
636
637static inline struct sk_buff *
638tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
639 struct sk_buff **to_free, int *ret)
640{
641 return skb;
642}
643
644static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
645{
646 return 0;
647}
648#endif
649
650struct tc_cls_u32_knode {
651 struct tcf_exts *exts;
652 struct tcf_result *res;
653 struct tc_u32_sel *sel;
654 u32 handle;
655 u32 val;
656 u32 mask;
657 u32 link_handle;
658 u8 fshift;
659};
660
661struct tc_cls_u32_hnode {
662 u32 handle;
663 u32 prio;
664 unsigned int divisor;
665};
666
667enum tc_clsu32_command {
668 TC_CLSU32_NEW_KNODE,
669 TC_CLSU32_REPLACE_KNODE,
670 TC_CLSU32_DELETE_KNODE,
671 TC_CLSU32_NEW_HNODE,
672 TC_CLSU32_REPLACE_HNODE,
673 TC_CLSU32_DELETE_HNODE,
674};
675
676struct tc_cls_u32_offload {
677 struct flow_cls_common_offload common;
678 /* knode values */
679 enum tc_clsu32_command command;
680 union {
681 struct tc_cls_u32_knode knode;
682 struct tc_cls_u32_hnode hnode;
683 };
684};
685
686static inline bool tc_can_offload(const struct net_device *dev)
687{
688 return dev->features & NETIF_F_HW_TC;
689}
690
691static inline bool tc_can_offload_extack(const struct net_device *dev,
692 struct netlink_ext_ack *extack)
693{
694 bool can = tc_can_offload(dev);
695
696 if (!can)
697 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
698
699 return can;
700}
701
702static inline bool
703tc_cls_can_offload_and_chain0(const struct net_device *dev,
704 struct flow_cls_common_offload *common)
705{
706 if (!tc_can_offload_extack(dev, extack: common->extack))
707 return false;
708 if (common->chain_index) {
709 NL_SET_ERR_MSG(common->extack,
710 "Driver supports only offload of chain 0");
711 return false;
712 }
713 return true;
714}
715
716static inline bool tc_skip_hw(u32 flags)
717{
718 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
719}
720
721static inline bool tc_skip_sw(u32 flags)
722{
723 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
724}
725
726/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
727static inline bool tc_flags_valid(u32 flags)
728{
729 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
730 TCA_CLS_FLAGS_VERBOSE))
731 return false;
732
733 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
734 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
735 return false;
736
737 return true;
738}
739
740static inline bool tc_in_hw(u32 flags)
741{
742 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
743}
744
745static inline void
746tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
747 const struct tcf_proto *tp, u32 flags,
748 struct netlink_ext_ack *extack)
749{
750 cls_common->chain_index = tp->chain->index;
751 cls_common->protocol = tp->protocol;
752 cls_common->prio = tp->prio >> 16;
753 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
754 cls_common->extack = extack;
755}
756
757#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
758static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
759{
760 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, id: TC_SKB_EXT);
761
762 if (tc_skb_ext)
763 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
764 return tc_skb_ext;
765}
766#endif
767
768enum tc_matchall_command {
769 TC_CLSMATCHALL_REPLACE,
770 TC_CLSMATCHALL_DESTROY,
771 TC_CLSMATCHALL_STATS,
772};
773
774struct tc_cls_matchall_offload {
775 struct flow_cls_common_offload common;
776 enum tc_matchall_command command;
777 struct flow_rule *rule;
778 struct flow_stats stats;
779 bool use_act_stats;
780 unsigned long cookie;
781};
782
783enum tc_clsbpf_command {
784 TC_CLSBPF_OFFLOAD,
785 TC_CLSBPF_STATS,
786};
787
788struct tc_cls_bpf_offload {
789 struct flow_cls_common_offload common;
790 enum tc_clsbpf_command command;
791 struct tcf_exts *exts;
792 struct bpf_prog *prog;
793 struct bpf_prog *oldprog;
794 const char *name;
795 bool exts_integrated;
796};
797
798/* This structure holds cookie structure that is passed from user
799 * to the kernel for actions and classifiers
800 */
801struct tc_cookie {
802 u8 *data;
803 u32 len;
804 struct rcu_head rcu;
805};
806
807struct tc_qopt_offload_stats {
808 struct gnet_stats_basic_sync *bstats;
809 struct gnet_stats_queue *qstats;
810};
811
812enum tc_mq_command {
813 TC_MQ_CREATE,
814 TC_MQ_DESTROY,
815 TC_MQ_STATS,
816 TC_MQ_GRAFT,
817};
818
819struct tc_mq_opt_offload_graft_params {
820 unsigned long queue;
821 u32 child_handle;
822};
823
824struct tc_mq_qopt_offload {
825 enum tc_mq_command command;
826 u32 handle;
827 union {
828 struct tc_qopt_offload_stats stats;
829 struct tc_mq_opt_offload_graft_params graft_params;
830 };
831};
832
833enum tc_htb_command {
834 /* Root */
835 TC_HTB_CREATE, /* Initialize HTB offload. */
836 TC_HTB_DESTROY, /* Destroy HTB offload. */
837
838 /* Classes */
839 /* Allocate qid and create leaf. */
840 TC_HTB_LEAF_ALLOC_QUEUE,
841 /* Convert leaf to inner, preserve and return qid, create new leaf. */
842 TC_HTB_LEAF_TO_INNER,
843 /* Delete leaf, while siblings remain. */
844 TC_HTB_LEAF_DEL,
845 /* Delete leaf, convert parent to leaf, preserving qid. */
846 TC_HTB_LEAF_DEL_LAST,
847 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
848 TC_HTB_LEAF_DEL_LAST_FORCE,
849 /* Modify parameters of a node. */
850 TC_HTB_NODE_MODIFY,
851
852 /* Class qdisc */
853 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
854};
855
856struct tc_htb_qopt_offload {
857 struct netlink_ext_ack *extack;
858 enum tc_htb_command command;
859 u32 parent_classid;
860 u16 classid;
861 u16 qid;
862 u32 quantum;
863 u64 rate;
864 u64 ceil;
865 u8 prio;
866};
867
868#define TC_HTB_CLASSID_ROOT U32_MAX
869
870enum tc_red_command {
871 TC_RED_REPLACE,
872 TC_RED_DESTROY,
873 TC_RED_STATS,
874 TC_RED_XSTATS,
875 TC_RED_GRAFT,
876};
877
878struct tc_red_qopt_offload_params {
879 u32 min;
880 u32 max;
881 u32 probability;
882 u32 limit;
883 bool is_ecn;
884 bool is_harddrop;
885 bool is_nodrop;
886 struct gnet_stats_queue *qstats;
887};
888
889struct tc_red_qopt_offload {
890 enum tc_red_command command;
891 u32 handle;
892 u32 parent;
893 union {
894 struct tc_red_qopt_offload_params set;
895 struct tc_qopt_offload_stats stats;
896 struct red_stats *xstats;
897 u32 child_handle;
898 };
899};
900
901enum tc_gred_command {
902 TC_GRED_REPLACE,
903 TC_GRED_DESTROY,
904 TC_GRED_STATS,
905};
906
907struct tc_gred_vq_qopt_offload_params {
908 bool present;
909 u32 limit;
910 u32 prio;
911 u32 min;
912 u32 max;
913 bool is_ecn;
914 bool is_harddrop;
915 u32 probability;
916 /* Only need backlog, see struct tc_prio_qopt_offload_params */
917 u32 *backlog;
918};
919
920struct tc_gred_qopt_offload_params {
921 bool grio_on;
922 bool wred_on;
923 unsigned int dp_cnt;
924 unsigned int dp_def;
925 struct gnet_stats_queue *qstats;
926 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
927};
928
929struct tc_gred_qopt_offload_stats {
930 struct gnet_stats_basic_sync bstats[MAX_DPs];
931 struct gnet_stats_queue qstats[MAX_DPs];
932 struct red_stats *xstats[MAX_DPs];
933};
934
935struct tc_gred_qopt_offload {
936 enum tc_gred_command command;
937 u32 handle;
938 u32 parent;
939 union {
940 struct tc_gred_qopt_offload_params set;
941 struct tc_gred_qopt_offload_stats stats;
942 };
943};
944
945enum tc_prio_command {
946 TC_PRIO_REPLACE,
947 TC_PRIO_DESTROY,
948 TC_PRIO_STATS,
949 TC_PRIO_GRAFT,
950};
951
952struct tc_prio_qopt_offload_params {
953 int bands;
954 u8 priomap[TC_PRIO_MAX + 1];
955 /* At the point of un-offloading the Qdisc, the reported backlog and
956 * qlen need to be reduced by the portion that is in HW.
957 */
958 struct gnet_stats_queue *qstats;
959};
960
961struct tc_prio_qopt_offload_graft_params {
962 u8 band;
963 u32 child_handle;
964};
965
966struct tc_prio_qopt_offload {
967 enum tc_prio_command command;
968 u32 handle;
969 u32 parent;
970 union {
971 struct tc_prio_qopt_offload_params replace_params;
972 struct tc_qopt_offload_stats stats;
973 struct tc_prio_qopt_offload_graft_params graft_params;
974 };
975};
976
977enum tc_root_command {
978 TC_ROOT_GRAFT,
979};
980
981struct tc_root_qopt_offload {
982 enum tc_root_command command;
983 u32 handle;
984 bool ingress;
985};
986
987enum tc_ets_command {
988 TC_ETS_REPLACE,
989 TC_ETS_DESTROY,
990 TC_ETS_STATS,
991 TC_ETS_GRAFT,
992};
993
994struct tc_ets_qopt_offload_replace_params {
995 unsigned int bands;
996 u8 priomap[TC_PRIO_MAX + 1];
997 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
998 unsigned int weights[TCQ_ETS_MAX_BANDS];
999 struct gnet_stats_queue *qstats;
1000};
1001
1002struct tc_ets_qopt_offload_graft_params {
1003 u8 band;
1004 u32 child_handle;
1005};
1006
1007struct tc_ets_qopt_offload {
1008 enum tc_ets_command command;
1009 u32 handle;
1010 u32 parent;
1011 union {
1012 struct tc_ets_qopt_offload_replace_params replace_params;
1013 struct tc_qopt_offload_stats stats;
1014 struct tc_ets_qopt_offload_graft_params graft_params;
1015 };
1016};
1017
1018enum tc_tbf_command {
1019 TC_TBF_REPLACE,
1020 TC_TBF_DESTROY,
1021 TC_TBF_STATS,
1022 TC_TBF_GRAFT,
1023};
1024
1025struct tc_tbf_qopt_offload_replace_params {
1026 struct psched_ratecfg rate;
1027 u32 max_size;
1028 struct gnet_stats_queue *qstats;
1029};
1030
1031struct tc_tbf_qopt_offload {
1032 enum tc_tbf_command command;
1033 u32 handle;
1034 u32 parent;
1035 union {
1036 struct tc_tbf_qopt_offload_replace_params replace_params;
1037 struct tc_qopt_offload_stats stats;
1038 u32 child_handle;
1039 };
1040};
1041
1042enum tc_fifo_command {
1043 TC_FIFO_REPLACE,
1044 TC_FIFO_DESTROY,
1045 TC_FIFO_STATS,
1046};
1047
1048struct tc_fifo_qopt_offload {
1049 enum tc_fifo_command command;
1050 u32 handle;
1051 u32 parent;
1052 union {
1053 struct tc_qopt_offload_stats stats;
1054 };
1055};
1056
1057#ifdef CONFIG_NET_CLS_ACT
1058DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1059void tc_skb_ext_tc_enable(void);
1060void tc_skb_ext_tc_disable(void);
1061#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1062#else /* CONFIG_NET_CLS_ACT */
1063static inline void tc_skb_ext_tc_enable(void) { }
1064static inline void tc_skb_ext_tc_disable(void) { }
1065#define tc_skb_ext_tc_enabled() false
1066#endif
1067
1068#endif
1069

source code of linux/include/net/pkt_cls.h