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

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