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#define NET_CLS_ALIAS_PREFIX "net-cls-"
28#define MODULE_ALIAS_NET_CLS(kind) MODULE_ALIAS(NET_CLS_ALIAS_PREFIX kind)
29
30struct tcf_block_ext_info {
31 enum flow_block_binder_type binder_type;
32 tcf_chain_head_change_t *chain_head_change;
33 void *chain_head_change_priv;
34 u32 block_index;
35};
36
37struct tcf_qevent {
38 struct tcf_block *block;
39 struct tcf_block_ext_info info;
40 struct tcf_proto __rcu *filter_chain;
41};
42
43struct tcf_block_cb;
44bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
45
46#ifdef CONFIG_NET_CLS
47struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
48 u32 chain_index);
49void tcf_chain_put_by_act(struct tcf_chain *chain);
50struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
51 struct tcf_chain *chain);
52struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
53 struct tcf_proto *tp);
54void tcf_block_netif_keep_dst(struct tcf_block *block);
55int tcf_block_get(struct tcf_block **p_block,
56 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
57 struct netlink_ext_ack *extack);
58int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
59 struct tcf_block_ext_info *ei,
60 struct netlink_ext_ack *extack);
61void tcf_block_put(struct tcf_block *block);
62void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
63 struct tcf_block_ext_info *ei);
64int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action,
65 int police, struct tcf_proto *tp, u32 handle, bool used_action_miss);
66
67static inline bool tcf_block_shared(struct tcf_block *block)
68{
69 return block->index;
70}
71
72static inline bool tcf_block_non_null_shared(struct tcf_block *block)
73{
74 return block && block->index;
75}
76
77#ifdef CONFIG_NET_CLS_ACT
78DECLARE_STATIC_KEY_FALSE(tcf_sw_enabled_key);
79
80static inline bool tcf_block_bypass_sw(struct tcf_block *block)
81{
82 return block && !atomic_read(v: &block->useswcnt);
83}
84#endif
85
86static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
87{
88 WARN_ON(tcf_block_shared(block));
89 return block->q;
90}
91
92int tcf_classify(struct sk_buff *skb,
93 const struct tcf_block *block,
94 const struct tcf_proto *tp, struct tcf_result *res,
95 bool compat_mode);
96
97static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
98 struct tcf_walker *arg,
99 void *filter)
100{
101 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
102 arg->stop = 1;
103 return false;
104 }
105
106 arg->count++;
107 return true;
108}
109
110#else
111static inline bool tcf_block_shared(struct tcf_block *block)
112{
113 return false;
114}
115
116static inline bool tcf_block_non_null_shared(struct tcf_block *block)
117{
118 return false;
119}
120
121static inline
122int tcf_block_get(struct tcf_block **p_block,
123 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
124 struct netlink_ext_ack *extack)
125{
126 return 0;
127}
128
129static inline
130int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
131 struct tcf_block_ext_info *ei,
132 struct netlink_ext_ack *extack)
133{
134 return 0;
135}
136
137static inline void tcf_block_put(struct tcf_block *block)
138{
139}
140
141static inline
142void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
143 struct tcf_block_ext_info *ei)
144{
145}
146
147static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
148{
149 return NULL;
150}
151
152static inline int tcf_classify(struct sk_buff *skb,
153 const struct tcf_block *block,
154 const struct tcf_proto *tp,
155 struct tcf_result *res, bool compat_mode)
156{
157 return TC_ACT_UNSPEC;
158}
159
160#endif
161
162static inline unsigned long
163__cls_set_class(unsigned long *clp, unsigned long cl)
164{
165 return xchg(clp, cl);
166}
167
168static inline void
169__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
170{
171 unsigned long cl;
172
173 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
174 cl = __cls_set_class(clp: &r->class, cl);
175 if (cl)
176 q->ops->cl_ops->unbind_tcf(q, cl);
177}
178
179static inline void
180tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
181{
182 struct Qdisc *q = tp->chain->block->q;
183
184 /* Check q as it is not set for shared blocks. In that case,
185 * setting class is not supported.
186 */
187 if (!q)
188 return;
189 sch_tree_lock(q);
190 __tcf_bind_filter(q, r, base);
191 sch_tree_unlock(q);
192}
193
194static inline void
195__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
196{
197 unsigned long cl;
198
199 if ((cl = __cls_set_class(clp: &r->class, cl: 0)) != 0)
200 q->ops->cl_ops->unbind_tcf(q, cl);
201}
202
203static inline void
204tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
205{
206 struct Qdisc *q = tp->chain->block->q;
207
208 if (!q)
209 return;
210 __tcf_unbind_filter(q, r);
211}
212
213static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
214 void *q, struct tcf_result *res,
215 unsigned long base)
216{
217 if (res->classid == classid) {
218 if (cl)
219 __tcf_bind_filter(q, r: res, base);
220 else
221 __tcf_unbind_filter(q, r: res);
222 }
223}
224
225struct tcf_exts {
226#ifdef CONFIG_NET_CLS_ACT
227 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
228 int nr_actions;
229 struct tc_action **actions;
230 struct net *net;
231 netns_tracker ns_tracker;
232 struct tcf_exts_miss_cookie_node *miss_cookie_node;
233#endif
234 /* Map to export classifier specific extension TLV types to the
235 * generic extensions API. Unsupported extensions must be set to 0.
236 */
237 int action;
238 int police;
239};
240
241static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
242 int action, int police)
243{
244#ifdef CONFIG_NET_CLS
245 return tcf_exts_init_ex(exts, net, action, police, NULL, handle: 0, used_action_miss: false);
246#else
247 return -EOPNOTSUPP;
248#endif
249}
250
251/* Return false if the netns is being destroyed in cleanup_net(). Callers
252 * need to do cleanup synchronously in this case, otherwise may race with
253 * tc_action_net_exit(). Return true for other cases.
254 */
255static inline bool tcf_exts_get_net(struct tcf_exts *exts)
256{
257#ifdef CONFIG_NET_CLS_ACT
258 exts->net = maybe_get_net(net: exts->net);
259 if (exts->net)
260 netns_tracker_alloc(net: exts->net, tracker: &exts->ns_tracker, GFP_KERNEL);
261 return exts->net != NULL;
262#else
263 return true;
264#endif
265}
266
267static inline void tcf_exts_put_net(struct tcf_exts *exts)
268{
269#ifdef CONFIG_NET_CLS_ACT
270 if (exts->net)
271 put_net_track(net: exts->net, tracker: &exts->ns_tracker);
272#endif
273}
274
275#ifdef CONFIG_NET_CLS_ACT
276#define tcf_exts_for_each_action(i, a, exts) \
277 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
278#else
279#define tcf_exts_for_each_action(i, a, exts) \
280 for (; 0; (void)(i), (void)(a), (void)(exts))
281#endif
282
283#define tcf_act_for_each_action(i, a, actions) \
284 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
285
286static inline bool tc_act_in_hw(struct tc_action *act)
287{
288 return !!act->in_hw_count;
289}
290
291static inline void
292tcf_exts_hw_stats_update(const struct tcf_exts *exts,
293 struct flow_stats *stats,
294 bool use_act_stats)
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 if (use_act_stats || tc_act_in_hw(act: a)) {
303 if (!tcf_action_update_hw_stats(action: a))
304 continue;
305 }
306
307 preempt_disable();
308 tcf_action_stats_update(a, bytes: stats->bytes, packets: stats->pkts, drops: stats->drops,
309 lastuse: stats->lastused, hw: true);
310 preempt_enable();
311
312 a->used_hw_stats = stats->used_hw_stats;
313 a->used_hw_stats_valid = stats->used_hw_stats_valid;
314 }
315#endif
316}
317
318/**
319 * tcf_exts_has_actions - check if at least one action is present
320 * @exts: tc filter extensions handle
321 *
322 * Returns: true if at least one action is present.
323 */
324static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
325{
326#ifdef CONFIG_NET_CLS_ACT
327 return exts->nr_actions;
328#else
329 return false;
330#endif
331}
332
333/**
334 * tcf_exts_exec - execute tc filter extensions
335 * @skb: socket buffer
336 * @exts: tc filter extensions handle
337 * @res: desired result
338 *
339 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
340 * a negative number if the filter must be considered unmatched or
341 * a positive action code (TC_ACT_*) which must be returned to the
342 * underlying layer.
343 */
344static inline int
345tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
346 struct tcf_result *res)
347{
348#ifdef CONFIG_NET_CLS_ACT
349 return tcf_action_exec(skb, actions: exts->actions, nr_actions: exts->nr_actions, res);
350#endif
351 return TC_ACT_OK;
352}
353
354static inline int
355tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
356 struct tcf_result *res)
357{
358#ifdef CONFIG_NET_CLS_ACT
359 return tcf_action_exec(skb, actions: exts->actions + act_index,
360 nr_actions: exts->nr_actions - act_index, res);
361#else
362 return TC_ACT_OK;
363#endif
364}
365
366int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
367 struct nlattr **tb, struct nlattr *rate_tlv,
368 struct tcf_exts *exts, u32 flags,
369 struct netlink_ext_ack *extack);
370int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
371 struct nlattr *rate_tlv, struct tcf_exts *exts,
372 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
373void tcf_exts_destroy(struct tcf_exts *exts);
374void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
375int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
376int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
377int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
378
379/**
380 * struct tcf_pkt_info - packet information
381 *
382 * @ptr: start of the pkt data
383 * @nexthdr: offset of the next header
384 */
385struct tcf_pkt_info {
386 unsigned char * ptr;
387 int nexthdr;
388};
389
390#ifdef CONFIG_NET_EMATCH
391
392struct tcf_ematch_ops;
393
394/**
395 * struct tcf_ematch - extended match (ematch)
396 *
397 * @matchid: identifier to allow userspace to reidentify a match
398 * @flags: flags specifying attributes and the relation to other matches
399 * @ops: the operations lookup table of the corresponding ematch module
400 * @datalen: length of the ematch specific configuration data
401 * @data: ematch specific data
402 * @net: the network namespace
403 */
404struct tcf_ematch {
405 struct tcf_ematch_ops * ops;
406 unsigned long data;
407 unsigned int datalen;
408 u16 matchid;
409 u16 flags;
410 struct net *net;
411};
412
413static inline int tcf_em_is_container(struct tcf_ematch *em)
414{
415 return !em->ops;
416}
417
418static inline int tcf_em_is_simple(struct tcf_ematch *em)
419{
420 return em->flags & TCF_EM_SIMPLE;
421}
422
423static inline int tcf_em_is_inverted(struct tcf_ematch *em)
424{
425 return em->flags & TCF_EM_INVERT;
426}
427
428static inline int tcf_em_last_match(struct tcf_ematch *em)
429{
430 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
431}
432
433static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
434{
435 if (tcf_em_last_match(em))
436 return 1;
437
438 if (result == 0 && em->flags & TCF_EM_REL_AND)
439 return 1;
440
441 if (result != 0 && em->flags & TCF_EM_REL_OR)
442 return 1;
443
444 return 0;
445}
446
447/**
448 * struct tcf_ematch_tree - ematch tree handle
449 *
450 * @hdr: ematch tree header supplied by userspace
451 * @matches: array of ematches
452 */
453struct tcf_ematch_tree {
454 struct tcf_ematch_tree_hdr hdr;
455 struct tcf_ematch * matches;
456
457};
458
459/**
460 * struct tcf_ematch_ops - ematch module operations
461 *
462 * @kind: identifier (kind) of this ematch module
463 * @datalen: length of expected configuration data (optional)
464 * @change: called during validation (optional)
465 * @match: called during ematch tree evaluation, must return 1/0
466 * @destroy: called during destroyage (optional)
467 * @dump: called during dumping process (optional)
468 * @owner: owner, must be set to THIS_MODULE
469 * @link: link to previous/next ematch module (internal use)
470 */
471struct tcf_ematch_ops {
472 int kind;
473 int datalen;
474 int (*change)(struct net *net, void *,
475 int, struct tcf_ematch *);
476 int (*match)(struct sk_buff *, struct tcf_ematch *,
477 struct tcf_pkt_info *);
478 void (*destroy)(struct tcf_ematch *);
479 int (*dump)(struct sk_buff *, struct tcf_ematch *);
480 struct module *owner;
481 struct list_head link;
482};
483
484int tcf_em_register(struct tcf_ematch_ops *);
485void tcf_em_unregister(struct tcf_ematch_ops *);
486int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
487 struct tcf_ematch_tree *);
488void tcf_em_tree_destroy(struct tcf_ematch_tree *);
489int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
490int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
491 struct tcf_pkt_info *);
492
493/**
494 * tcf_em_tree_match - evaluate an ematch tree
495 *
496 * @skb: socket buffer of the packet in question
497 * @tree: ematch tree to be used for evaluation
498 * @info: packet information examined by classifier
499 *
500 * This function matches @skb against the ematch tree in @tree by going
501 * through all ematches respecting their logic relations returning
502 * as soon as the result is obvious.
503 *
504 * Returns: 1 if the ematch tree as-one matches, no ematches are configured
505 * or ematch is not enabled in the kernel, otherwise 0 is returned.
506 */
507static inline int tcf_em_tree_match(struct sk_buff *skb,
508 struct tcf_ematch_tree *tree,
509 struct tcf_pkt_info *info)
510{
511 if (tree->hdr.nmatches)
512 return __tcf_em_tree_match(skb, tree, info);
513 else
514 return 1;
515}
516
517#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
518
519#else /* CONFIG_NET_EMATCH */
520
521struct tcf_ematch_tree {
522};
523
524#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
525#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
526#define tcf_em_tree_dump(skb, t, tlv) (0)
527#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
528
529#endif /* CONFIG_NET_EMATCH */
530
531static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
532{
533 switch (layer) {
534 case TCF_LAYER_LINK:
535 return skb_mac_header(skb);
536 case TCF_LAYER_NETWORK:
537 return skb_network_header(skb);
538 case TCF_LAYER_TRANSPORT:
539 if (!skb_transport_header_was_set(skb))
540 break;
541 return skb_transport_header(skb);
542 }
543
544 return NULL;
545}
546
547static inline int tcf_valid_offset(const struct sk_buff *skb,
548 const unsigned char *ptr, const int len)
549{
550 return likely((ptr + len) <= skb_tail_pointer(skb) &&
551 ptr >= skb->head &&
552 (ptr <= (ptr + len)));
553}
554
555static inline int
556tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
557 struct netlink_ext_ack *extack)
558{
559 char indev[IFNAMSIZ];
560 struct net_device *dev;
561
562 if (nla_strscpy(dst: indev, nla: indev_tlv, IFNAMSIZ) < 0) {
563 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
564 "Interface name too long");
565 return -EINVAL;
566 }
567 dev = __dev_get_by_name(net, name: indev);
568 if (!dev) {
569 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
570 "Network device not found");
571 return -ENODEV;
572 }
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
586int tc_setup_offload_action(struct flow_action *flow_action,
587 const struct tcf_exts *exts,
588 struct netlink_ext_ack *extack);
589void tc_cleanup_offload_action(struct flow_action *flow_action);
590int tc_setup_action(struct flow_action *flow_action,
591 struct tc_action *actions[],
592 u32 miss_cookie_base,
593 struct netlink_ext_ack *extack);
594
595int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
596 void *type_data, bool err_stop, bool rtnl_held);
597int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
598 enum tc_setup_type type, void *type_data, bool err_stop,
599 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
600int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
601 enum tc_setup_type type, void *type_data, bool err_stop,
602 u32 *old_flags, unsigned int *old_in_hw_count,
603 u32 *new_flags, unsigned int *new_in_hw_count,
604 bool rtnl_held);
605int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
606 enum tc_setup_type type, void *type_data, bool err_stop,
607 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
608int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
609 bool add, flow_setup_cb_t *cb,
610 enum tc_setup_type type, void *type_data,
611 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
612unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
613
614#ifdef CONFIG_NET_CLS_ACT
615int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
616 enum flow_block_binder_type binder_type,
617 struct nlattr *block_index_attr,
618 struct netlink_ext_ack *extack);
619void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
620int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
621 struct netlink_ext_ack *extack);
622struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
623 struct sk_buff **to_free, int *ret);
624int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
625#else
626static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
627 enum flow_block_binder_type binder_type,
628 struct nlattr *block_index_attr,
629 struct netlink_ext_ack *extack)
630{
631 return 0;
632}
633
634static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
635{
636}
637
638static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
639 struct netlink_ext_ack *extack)
640{
641 return 0;
642}
643
644static inline struct sk_buff *
645tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
646 struct sk_buff **to_free, int *ret)
647{
648 return skb;
649}
650
651static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
652{
653 return 0;
654}
655#endif
656
657struct tc_cls_u32_knode {
658 struct tcf_exts *exts;
659 struct tcf_result *res;
660 struct tc_u32_sel *sel;
661 u32 handle;
662 u32 val;
663 u32 mask;
664 u32 link_handle;
665 u8 fshift;
666};
667
668struct tc_cls_u32_hnode {
669 u32 handle;
670 u32 prio;
671 unsigned int divisor;
672};
673
674enum tc_clsu32_command {
675 TC_CLSU32_NEW_KNODE,
676 TC_CLSU32_REPLACE_KNODE,
677 TC_CLSU32_DELETE_KNODE,
678 TC_CLSU32_NEW_HNODE,
679 TC_CLSU32_REPLACE_HNODE,
680 TC_CLSU32_DELETE_HNODE,
681};
682
683struct tc_cls_u32_offload {
684 struct flow_cls_common_offload common;
685 /* knode values */
686 enum tc_clsu32_command command;
687 union {
688 struct tc_cls_u32_knode knode;
689 struct tc_cls_u32_hnode hnode;
690 };
691};
692
693static inline bool tc_can_offload(const struct net_device *dev)
694{
695 return dev->features & NETIF_F_HW_TC;
696}
697
698static inline bool tc_can_offload_extack(const struct net_device *dev,
699 struct netlink_ext_ack *extack)
700{
701 bool can = tc_can_offload(dev);
702
703 if (!can)
704 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
705
706 return can;
707}
708
709static inline bool
710tc_cls_can_offload_and_chain0(const struct net_device *dev,
711 struct flow_cls_common_offload *common)
712{
713 if (!tc_can_offload_extack(dev, extack: common->extack))
714 return false;
715 if (common->chain_index) {
716 NL_SET_ERR_MSG(common->extack,
717 "Driver supports only offload of chain 0");
718 return false;
719 }
720 return true;
721}
722
723static inline bool tc_skip_hw(u32 flags)
724{
725 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
726}
727
728static inline bool tc_skip_sw(u32 flags)
729{
730 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
731}
732
733/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
734static inline bool tc_flags_valid(u32 flags)
735{
736 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
737 TCA_CLS_FLAGS_VERBOSE))
738 return false;
739
740 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
741 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
742 return false;
743
744 return true;
745}
746
747static inline bool tc_in_hw(u32 flags)
748{
749 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
750}
751
752static inline void
753tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
754 const struct tcf_proto *tp, u32 flags,
755 struct netlink_ext_ack *extack)
756{
757 cls_common->chain_index = tp->chain->index;
758 cls_common->protocol = tp->protocol;
759 cls_common->prio = tp->prio >> 16;
760 cls_common->skip_sw = tc_skip_sw(flags);
761 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
762 cls_common->extack = extack;
763}
764
765static inline void tcf_proto_update_usesw(struct tcf_proto *tp, u32 flags)
766{
767 if (tp->usesw)
768 return;
769 if (tc_skip_sw(flags) && tc_in_hw(flags))
770 return;
771 tp->usesw = true;
772}
773
774#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
775static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
776{
777 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, id: TC_SKB_EXT);
778
779 if (tc_skb_ext)
780 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
781 return tc_skb_ext;
782}
783#endif
784
785enum tc_matchall_command {
786 TC_CLSMATCHALL_REPLACE,
787 TC_CLSMATCHALL_DESTROY,
788 TC_CLSMATCHALL_STATS,
789};
790
791struct tc_cls_matchall_offload {
792 struct flow_cls_common_offload common;
793 enum tc_matchall_command command;
794 struct flow_rule *rule;
795 struct flow_stats stats;
796 bool use_act_stats;
797 unsigned long cookie;
798};
799
800enum tc_clsbpf_command {
801 TC_CLSBPF_OFFLOAD,
802 TC_CLSBPF_STATS,
803};
804
805struct tc_cls_bpf_offload {
806 struct flow_cls_common_offload common;
807 enum tc_clsbpf_command command;
808 struct tcf_exts *exts;
809 struct bpf_prog *prog;
810 struct bpf_prog *oldprog;
811 const char *name;
812 bool exts_integrated;
813};
814
815/* This structure holds cookie structure that is passed from user
816 * to the kernel for actions and classifiers
817 */
818struct tc_cookie {
819 u8 *data;
820 u32 len;
821 struct rcu_head rcu;
822};
823
824struct tc_qopt_offload_stats {
825 struct gnet_stats_basic_sync *bstats;
826 struct gnet_stats_queue *qstats;
827};
828
829enum tc_mq_command {
830 TC_MQ_CREATE,
831 TC_MQ_DESTROY,
832 TC_MQ_STATS,
833 TC_MQ_GRAFT,
834};
835
836struct tc_mq_opt_offload_graft_params {
837 unsigned long queue;
838 u32 child_handle;
839};
840
841struct tc_mq_qopt_offload {
842 enum tc_mq_command command;
843 u32 handle;
844 union {
845 struct tc_qopt_offload_stats stats;
846 struct tc_mq_opt_offload_graft_params graft_params;
847 };
848};
849
850enum tc_htb_command {
851 /* Root */
852 TC_HTB_CREATE, /* Initialize HTB offload. */
853 TC_HTB_DESTROY, /* Destroy HTB offload. */
854
855 /* Classes */
856 /* Allocate qid and create leaf. */
857 TC_HTB_LEAF_ALLOC_QUEUE,
858 /* Convert leaf to inner, preserve and return qid, create new leaf. */
859 TC_HTB_LEAF_TO_INNER,
860 /* Delete leaf, while siblings remain. */
861 TC_HTB_LEAF_DEL,
862 /* Delete leaf, convert parent to leaf, preserving qid. */
863 TC_HTB_LEAF_DEL_LAST,
864 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
865 TC_HTB_LEAF_DEL_LAST_FORCE,
866 /* Modify parameters of a node. */
867 TC_HTB_NODE_MODIFY,
868
869 /* Class qdisc */
870 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
871};
872
873struct tc_htb_qopt_offload {
874 struct netlink_ext_ack *extack;
875 enum tc_htb_command command;
876 u32 parent_classid;
877 u16 classid;
878 u16 qid;
879 u32 quantum;
880 u64 rate;
881 u64 ceil;
882 u8 prio;
883};
884
885#define TC_HTB_CLASSID_ROOT U32_MAX
886
887enum tc_red_command {
888 TC_RED_REPLACE,
889 TC_RED_DESTROY,
890 TC_RED_STATS,
891 TC_RED_XSTATS,
892 TC_RED_GRAFT,
893};
894
895struct tc_red_qopt_offload_params {
896 u32 min;
897 u32 max;
898 u32 probability;
899 u32 limit;
900 bool is_ecn;
901 bool is_harddrop;
902 bool is_nodrop;
903 struct gnet_stats_queue *qstats;
904};
905
906struct tc_red_qopt_offload {
907 enum tc_red_command command;
908 u32 handle;
909 u32 parent;
910 union {
911 struct tc_red_qopt_offload_params set;
912 struct tc_qopt_offload_stats stats;
913 struct red_stats *xstats;
914 u32 child_handle;
915 };
916};
917
918enum tc_gred_command {
919 TC_GRED_REPLACE,
920 TC_GRED_DESTROY,
921 TC_GRED_STATS,
922};
923
924struct tc_gred_vq_qopt_offload_params {
925 bool present;
926 u32 limit;
927 u32 prio;
928 u32 min;
929 u32 max;
930 bool is_ecn;
931 bool is_harddrop;
932 u32 probability;
933 /* Only need backlog, see struct tc_prio_qopt_offload_params */
934 u32 *backlog;
935};
936
937struct tc_gred_qopt_offload_params {
938 bool grio_on;
939 bool wred_on;
940 unsigned int dp_cnt;
941 unsigned int dp_def;
942 struct gnet_stats_queue *qstats;
943 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
944};
945
946struct tc_gred_qopt_offload_stats {
947 struct gnet_stats_basic_sync bstats[MAX_DPs];
948 struct gnet_stats_queue qstats[MAX_DPs];
949 struct red_stats *xstats[MAX_DPs];
950};
951
952struct tc_gred_qopt_offload {
953 enum tc_gred_command command;
954 u32 handle;
955 u32 parent;
956 union {
957 struct tc_gred_qopt_offload_params set;
958 struct tc_gred_qopt_offload_stats stats;
959 };
960};
961
962enum tc_prio_command {
963 TC_PRIO_REPLACE,
964 TC_PRIO_DESTROY,
965 TC_PRIO_STATS,
966 TC_PRIO_GRAFT,
967};
968
969struct tc_prio_qopt_offload_params {
970 int bands;
971 u8 priomap[TC_PRIO_MAX + 1];
972 /* At the point of un-offloading the Qdisc, the reported backlog and
973 * qlen need to be reduced by the portion that is in HW.
974 */
975 struct gnet_stats_queue *qstats;
976};
977
978struct tc_prio_qopt_offload_graft_params {
979 u8 band;
980 u32 child_handle;
981};
982
983struct tc_prio_qopt_offload {
984 enum tc_prio_command command;
985 u32 handle;
986 u32 parent;
987 union {
988 struct tc_prio_qopt_offload_params replace_params;
989 struct tc_qopt_offload_stats stats;
990 struct tc_prio_qopt_offload_graft_params graft_params;
991 };
992};
993
994enum tc_root_command {
995 TC_ROOT_GRAFT,
996};
997
998struct tc_root_qopt_offload {
999 enum tc_root_command command;
1000 u32 handle;
1001 bool ingress;
1002};
1003
1004enum tc_ets_command {
1005 TC_ETS_REPLACE,
1006 TC_ETS_DESTROY,
1007 TC_ETS_STATS,
1008 TC_ETS_GRAFT,
1009};
1010
1011struct tc_ets_qopt_offload_replace_params {
1012 unsigned int bands;
1013 u8 priomap[TC_PRIO_MAX + 1];
1014 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
1015 unsigned int weights[TCQ_ETS_MAX_BANDS];
1016 struct gnet_stats_queue *qstats;
1017};
1018
1019struct tc_ets_qopt_offload_graft_params {
1020 u8 band;
1021 u32 child_handle;
1022};
1023
1024struct tc_ets_qopt_offload {
1025 enum tc_ets_command command;
1026 u32 handle;
1027 u32 parent;
1028 union {
1029 struct tc_ets_qopt_offload_replace_params replace_params;
1030 struct tc_qopt_offload_stats stats;
1031 struct tc_ets_qopt_offload_graft_params graft_params;
1032 };
1033};
1034
1035enum tc_tbf_command {
1036 TC_TBF_REPLACE,
1037 TC_TBF_DESTROY,
1038 TC_TBF_STATS,
1039 TC_TBF_GRAFT,
1040};
1041
1042struct tc_tbf_qopt_offload_replace_params {
1043 struct psched_ratecfg rate;
1044 u32 max_size;
1045 struct gnet_stats_queue *qstats;
1046};
1047
1048struct tc_tbf_qopt_offload {
1049 enum tc_tbf_command command;
1050 u32 handle;
1051 u32 parent;
1052 union {
1053 struct tc_tbf_qopt_offload_replace_params replace_params;
1054 struct tc_qopt_offload_stats stats;
1055 u32 child_handle;
1056 };
1057};
1058
1059enum tc_fifo_command {
1060 TC_FIFO_REPLACE,
1061 TC_FIFO_DESTROY,
1062 TC_FIFO_STATS,
1063};
1064
1065struct tc_fifo_qopt_offload {
1066 enum tc_fifo_command command;
1067 u32 handle;
1068 u32 parent;
1069 union {
1070 struct tc_qopt_offload_stats stats;
1071 };
1072};
1073
1074#ifdef CONFIG_NET_CLS_ACT
1075DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1076void tc_skb_ext_tc_enable(void);
1077void tc_skb_ext_tc_disable(void);
1078#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1079#else /* CONFIG_NET_CLS_ACT */
1080static inline void tc_skb_ext_tc_enable(void) { }
1081static inline void tc_skb_ext_tc_disable(void) { }
1082#define tc_skb_ext_tc_enabled() false
1083#endif
1084
1085#endif
1086

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