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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_PKT_CLS_H
3#define __NET_PKT_CLS_H
4
5#include <linux/pkt_cls.h>
6#include <linux/workqueue.h>
7#include <net/sch_generic.h>
8#include <net/act_api.h>
9#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(&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(&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(&r->class, 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, res, base);
220 else
221 __tcf_unbind_filter(q, 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, 0, 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(exts->net);
259 if (exts->net)
260 netns_tracker_alloc(exts->net, &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(exts->net, &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(a)) {
303 if (!tcf_action_update_hw_stats(a))
304 continue;
305 }
306
307 preempt_disable();
308 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops,
309 stats->lastused, 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, exts->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, exts->actions + act_index,
360 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 return skb_transport_header(skb);
540 }
541
542 return NULL;
543}
544
545static inline int tcf_valid_offset(const struct sk_buff *skb,
546 const unsigned char *ptr, const int len)
547{
548 return likely((ptr + len) <= skb_tail_pointer(skb) &&
549 ptr >= skb->head &&
550 (ptr <= (ptr + len)));
551}
552
553static inline int
554tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
555 struct netlink_ext_ack *extack)
556{
557 char indev[IFNAMSIZ];
558 struct net_device *dev;
559
560 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
561 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
562 "Interface name too long");
563 return -EINVAL;
564 }
565 dev = __dev_get_by_name(net, indev);
566 if (!dev) {
567 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
568 "Network device not found");
569 return -ENODEV;
570 }
571 return dev->ifindex;
572}
573
574static inline bool
575tcf_match_indev(struct sk_buff *skb, int ifindex)
576{
577 if (!ifindex)
578 return true;
579 if (!skb->skb_iif)
580 return false;
581 return ifindex == skb->skb_iif;
582}
583
584int tc_setup_offload_action(struct flow_action *flow_action,
585 const struct tcf_exts *exts,
586 struct netlink_ext_ack *extack);
587void tc_cleanup_offload_action(struct flow_action *flow_action);
588int tc_setup_action(struct flow_action *flow_action,
589 struct tc_action *actions[],
590 u32 miss_cookie_base,
591 struct netlink_ext_ack *extack);
592
593int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
594 void *type_data, bool err_stop, bool rtnl_held);
595int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
596 enum tc_setup_type type, void *type_data, bool err_stop,
597 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
598int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
599 enum tc_setup_type type, void *type_data, bool err_stop,
600 u32 *old_flags, unsigned int *old_in_hw_count,
601 u32 *new_flags, unsigned int *new_in_hw_count,
602 bool rtnl_held);
603int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
604 enum tc_setup_type type, void *type_data, bool err_stop,
605 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
606int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
607 bool add, flow_setup_cb_t *cb,
608 enum tc_setup_type type, void *type_data,
609 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
610unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
611
612#ifdef CONFIG_NET_CLS_ACT
613int 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);
617void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
618int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
619 struct netlink_ext_ack *extack);
620struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
621 struct sk_buff **to_free, int *ret);
622int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
623#else
624static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
625 enum flow_block_binder_type binder_type,
626 struct nlattr *block_index_attr,
627 struct netlink_ext_ack *extack)
628{
629 return 0;
630}
631
632static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
633{
634}
635
636static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
637 struct netlink_ext_ack *extack)
638{
639 return 0;
640}
641
642static inline struct sk_buff *
643tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
644 struct sk_buff **to_free, int *ret)
645{
646 return skb;
647}
648
649static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
650{
651 return 0;
652}
653#endif
654
655struct tc_cls_u32_knode {
656 struct tcf_exts *exts;
657 struct tcf_result *res;
658 struct tc_u32_sel *sel;
659 u32 handle;
660 u32 val;
661 u32 mask;
662 u32 link_handle;
663 u8 fshift;
664};
665
666struct tc_cls_u32_hnode {
667 u32 handle;
668 u32 prio;
669 unsigned int divisor;
670};
671
672enum tc_clsu32_command {
673 TC_CLSU32_NEW_KNODE,
674 TC_CLSU32_REPLACE_KNODE,
675 TC_CLSU32_DELETE_KNODE,
676 TC_CLSU32_NEW_HNODE,
677 TC_CLSU32_REPLACE_HNODE,
678 TC_CLSU32_DELETE_HNODE,
679};
680
681struct tc_cls_u32_offload {
682 struct flow_cls_common_offload common;
683 /* knode values */
684 enum tc_clsu32_command command;
685 union {
686 struct tc_cls_u32_knode knode;
687 struct tc_cls_u32_hnode hnode;
688 };
689};
690
691static inline bool tc_can_offload(const struct net_device *dev)
692{
693 return dev->features & NETIF_F_HW_TC;
694}
695
696static inline bool tc_can_offload_extack(const struct net_device *dev,
697 struct netlink_ext_ack *extack)
698{
699 bool can = tc_can_offload(dev);
700
701 if (!can)
702 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
703
704 return can;
705}
706
707static inline bool
708tc_cls_can_offload_and_chain0(const struct net_device *dev,
709 struct flow_cls_common_offload *common)
710{
711 if (!tc_can_offload_extack(dev, common->extack))
712 return false;
713 if (common->chain_index) {
714 NL_SET_ERR_MSG(common->extack,
715 "Driver supports only offload of chain 0");
716 return false;
717 }
718 return true;
719}
720
721static inline bool tc_skip_hw(u32 flags)
722{
723 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
724}
725
726static inline bool tc_skip_sw(u32 flags)
727{
728 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
729}
730
731/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
732static inline bool tc_flags_valid(u32 flags)
733{
734 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
735 TCA_CLS_FLAGS_VERBOSE))
736 return false;
737
738 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
739 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
740 return false;
741
742 return true;
743}
744
745static inline bool tc_in_hw(u32 flags)
746{
747 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
748}
749
750static inline void
751tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
752 const struct tcf_proto *tp, u32 flags,
753 struct netlink_ext_ack *extack)
754{
755 cls_common->chain_index = tp->chain->index;
756 cls_common->protocol = tp->protocol;
757 cls_common->prio = tp->prio >> 16;
758 cls_common->skip_sw = tc_skip_sw(flags);
759 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
760 cls_common->extack = extack;
761}
762
763static inline void tcf_proto_update_usesw(struct tcf_proto *tp, u32 flags)
764{
765 if (tp->usesw)
766 return;
767 if (tc_skip_sw(flags) && tc_in_hw(flags))
768 return;
769 tp->usesw = true;
770}
771
772#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
773static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
774{
775 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
776
777 if (tc_skb_ext)
778 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
779 return tc_skb_ext;
780}
781#endif
782
783enum tc_matchall_command {
784 TC_CLSMATCHALL_REPLACE,
785 TC_CLSMATCHALL_DESTROY,
786 TC_CLSMATCHALL_STATS,
787};
788
789struct tc_cls_matchall_offload {
790 struct flow_cls_common_offload common;
791 enum tc_matchall_command command;
792 struct flow_rule *rule;
793 struct flow_stats stats;
794 bool use_act_stats;
795 unsigned long cookie;
796};
797
798enum tc_clsbpf_command {
799 TC_CLSBPF_OFFLOAD,
800 TC_CLSBPF_STATS,
801};
802
803struct tc_cls_bpf_offload {
804 struct flow_cls_common_offload common;
805 enum tc_clsbpf_command command;
806 struct tcf_exts *exts;
807 struct bpf_prog *prog;
808 struct bpf_prog *oldprog;
809 const char *name;
810 bool exts_integrated;
811};
812
813/* This structure holds cookie structure that is passed from user
814 * to the kernel for actions and classifiers
815 */
816struct tc_cookie {
817 u8 *data;
818 u32 len;
819 struct rcu_head rcu;
820};
821
822struct tc_qopt_offload_stats {
823 struct gnet_stats_basic_sync *bstats;
824 struct gnet_stats_queue *qstats;
825};
826
827enum tc_mq_command {
828 TC_MQ_CREATE,
829 TC_MQ_DESTROY,
830 TC_MQ_STATS,
831 TC_MQ_GRAFT,
832};
833
834struct tc_mq_opt_offload_graft_params {
835 unsigned long queue;
836 u32 child_handle;
837};
838
839struct tc_mq_qopt_offload {
840 enum tc_mq_command command;
841 u32 handle;
842 union {
843 struct tc_qopt_offload_stats stats;
844 struct tc_mq_opt_offload_graft_params graft_params;
845 };
846};
847
848enum tc_htb_command {
849 /* Root */
850 TC_HTB_CREATE, /* Initialize HTB offload. */
851 TC_HTB_DESTROY, /* Destroy HTB offload. */
852
853 /* Classes */
854 /* Allocate qid and create leaf. */
855 TC_HTB_LEAF_ALLOC_QUEUE,
856 /* Convert leaf to inner, preserve and return qid, create new leaf. */
857 TC_HTB_LEAF_TO_INNER,
858 /* Delete leaf, while siblings remain. */
859 TC_HTB_LEAF_DEL,
860 /* Delete leaf, convert parent to leaf, preserving qid. */
861 TC_HTB_LEAF_DEL_LAST,
862 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
863 TC_HTB_LEAF_DEL_LAST_FORCE,
864 /* Modify parameters of a node. */
865 TC_HTB_NODE_MODIFY,
866
867 /* Class qdisc */
868 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
869};
870
871struct tc_htb_qopt_offload {
872 struct netlink_ext_ack *extack;
873 enum tc_htb_command command;
874 u32 parent_classid;
875 u16 classid;
876 u16 qid;
877 u32 quantum;
878 u64 rate;
879 u64 ceil;
880 u8 prio;
881};
882
883#define TC_HTB_CLASSID_ROOT U32_MAX
884
885enum tc_red_command {
886 TC_RED_REPLACE,
887 TC_RED_DESTROY,
888 TC_RED_STATS,
889 TC_RED_XSTATS,
890 TC_RED_GRAFT,
891};
892
893struct tc_red_qopt_offload_params {
894 u32 min;
895 u32 max;
896 u32 probability;
897 u32 limit;
898 bool is_ecn;
899 bool is_harddrop;
900 bool is_nodrop;
901 struct gnet_stats_queue *qstats;
902};
903
904struct tc_red_qopt_offload {
905 enum tc_red_command command;
906 u32 handle;
907 u32 parent;
908 union {
909 struct tc_red_qopt_offload_params set;
910 struct tc_qopt_offload_stats stats;
911 struct red_stats *xstats;
912 u32 child_handle;
913 };
914};
915
916enum tc_gred_command {
917 TC_GRED_REPLACE,
918 TC_GRED_DESTROY,
919 TC_GRED_STATS,
920};
921
922struct tc_gred_vq_qopt_offload_params {
923 bool present;
924 u32 limit;
925 u32 prio;
926 u32 min;
927 u32 max;
928 bool is_ecn;
929 bool is_harddrop;
930 u32 probability;
931 /* Only need backlog, see struct tc_prio_qopt_offload_params */
932 u32 *backlog;
933};
934
935struct tc_gred_qopt_offload_params {
936 bool grio_on;
937 bool wred_on;
938 unsigned int dp_cnt;
939 unsigned int dp_def;
940 struct gnet_stats_queue *qstats;
941 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
942};
943
944struct tc_gred_qopt_offload_stats {
945 struct gnet_stats_basic_sync bstats[MAX_DPs];
946 struct gnet_stats_queue qstats[MAX_DPs];
947 struct red_stats *xstats[MAX_DPs];
948};
949
950struct tc_gred_qopt_offload {
951 enum tc_gred_command command;
952 u32 handle;
953 u32 parent;
954 union {
955 struct tc_gred_qopt_offload_params set;
956 struct tc_gred_qopt_offload_stats stats;
957 };
958};
959
960enum tc_prio_command {
961 TC_PRIO_REPLACE,
962 TC_PRIO_DESTROY,
963 TC_PRIO_STATS,
964 TC_PRIO_GRAFT,
965};
966
967struct tc_prio_qopt_offload_params {
968 int bands;
969 u8 priomap[TC_PRIO_MAX + 1];
970 /* At the point of un-offloading the Qdisc, the reported backlog and
971 * qlen need to be reduced by the portion that is in HW.
972 */
973 struct gnet_stats_queue *qstats;
974};
975
976struct tc_prio_qopt_offload_graft_params {
977 u8 band;
978 u32 child_handle;
979};
980
981struct tc_prio_qopt_offload {
982 enum tc_prio_command command;
983 u32 handle;
984 u32 parent;
985 union {
986 struct tc_prio_qopt_offload_params replace_params;
987 struct tc_qopt_offload_stats stats;
988 struct tc_prio_qopt_offload_graft_params graft_params;
989 };
990};
991
992enum tc_root_command {
993 TC_ROOT_GRAFT,
994};
995
996struct tc_root_qopt_offload {
997 enum tc_root_command command;
998 u32 handle;
999 bool ingress;
1000};
1001
1002enum tc_ets_command {
1003 TC_ETS_REPLACE,
1004 TC_ETS_DESTROY,
1005 TC_ETS_STATS,
1006 TC_ETS_GRAFT,
1007};
1008
1009struct tc_ets_qopt_offload_replace_params {
1010 unsigned int bands;
1011 u8 priomap[TC_PRIO_MAX + 1];
1012 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
1013 unsigned int weights[TCQ_ETS_MAX_BANDS];
1014 struct gnet_stats_queue *qstats;
1015};
1016
1017struct tc_ets_qopt_offload_graft_params {
1018 u8 band;
1019 u32 child_handle;
1020};
1021
1022struct tc_ets_qopt_offload {
1023 enum tc_ets_command command;
1024 u32 handle;
1025 u32 parent;
1026 union {
1027 struct tc_ets_qopt_offload_replace_params replace_params;
1028 struct tc_qopt_offload_stats stats;
1029 struct tc_ets_qopt_offload_graft_params graft_params;
1030 };
1031};
1032
1033enum tc_tbf_command {
1034 TC_TBF_REPLACE,
1035 TC_TBF_DESTROY,
1036 TC_TBF_STATS,
1037 TC_TBF_GRAFT,
1038};
1039
1040struct tc_tbf_qopt_offload_replace_params {
1041 struct psched_ratecfg rate;
1042 u32 max_size;
1043 struct gnet_stats_queue *qstats;
1044};
1045
1046struct tc_tbf_qopt_offload {
1047 enum tc_tbf_command command;
1048 u32 handle;
1049 u32 parent;
1050 union {
1051 struct tc_tbf_qopt_offload_replace_params replace_params;
1052 struct tc_qopt_offload_stats stats;
1053 u32 child_handle;
1054 };
1055};
1056
1057enum tc_fifo_command {
1058 TC_FIFO_REPLACE,
1059 TC_FIFO_DESTROY,
1060 TC_FIFO_STATS,
1061};
1062
1063struct tc_fifo_qopt_offload {
1064 enum tc_fifo_command command;
1065 u32 handle;
1066 u32 parent;
1067 union {
1068 struct tc_qopt_offload_stats stats;
1069 };
1070};
1071
1072#ifdef CONFIG_NET_CLS_ACT
1073DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1074void tc_skb_ext_tc_enable(void);
1075void tc_skb_ext_tc_disable(void);
1076#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1077#else /* CONFIG_NET_CLS_ACT */
1078static inline void tc_skb_ext_tc_enable(void) { }
1079static inline void tc_skb_ext_tc_disable(void) { }
1080#define tc_skb_ext_tc_enabled() false
1081#endif
1082
1083#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