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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
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
84static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
85 struct tcf_walker *arg,
86 void *filter)
87{
88 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
89 arg->stop = 1;
90 return false;
91 }
92
93 arg->count++;
94 return true;
95}
96
97#else
98static inline bool tcf_block_shared(struct tcf_block *block)
99{
100 return false;
101}
102
103static inline bool tcf_block_non_null_shared(struct tcf_block *block)
104{
105 return false;
106}
107
108static inline
109int tcf_block_get(struct tcf_block **p_block,
110 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
111 struct netlink_ext_ack *extack)
112{
113 return 0;
114}
115
116static inline
117int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
118 struct tcf_block_ext_info *ei,
119 struct netlink_ext_ack *extack)
120{
121 return 0;
122}
123
124static inline void tcf_block_put(struct tcf_block *block)
125{
126}
127
128static inline
129void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
130 struct tcf_block_ext_info *ei)
131{
132}
133
134static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
135{
136 return NULL;
137}
138
139static inline
140int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
141 void *cb_priv)
142{
143 return 0;
144}
145
146static inline
147void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
148 void *cb_priv)
149{
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#endif
233 /* Map to export classifier specific extension TLV types to the
234 * generic extensions API. Unsupported extensions must be set to 0.
235 */
236 int action;
237 int police;
238};
239
240static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
241 int action, int police)
242{
243#ifdef CONFIG_NET_CLS_ACT
244 exts->type = 0;
245 exts->nr_actions = 0;
246 /* Note: we do not own yet a reference on net.
247 * This reference might be taken later from tcf_exts_get_net().
248 */
249 exts->net = net;
250 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
251 GFP_KERNEL);
252 if (!exts->actions)
253 return -ENOMEM;
254#endif
255 exts->action = action;
256 exts->police = police;
257 return 0;
258}
259
260/* Return false if the netns is being destroyed in cleanup_net(). Callers
261 * need to do cleanup synchronously in this case, otherwise may race with
262 * tc_action_net_exit(). Return true for other cases.
263 */
264static inline bool tcf_exts_get_net(struct tcf_exts *exts)
265{
266#ifdef CONFIG_NET_CLS_ACT
267 exts->net = maybe_get_net(exts->net);
268 if (exts->net)
269 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
270 return exts->net != NULL;
271#else
272 return true;
273#endif
274}
275
276static inline void tcf_exts_put_net(struct tcf_exts *exts)
277{
278#ifdef CONFIG_NET_CLS_ACT
279 if (exts->net)
280 put_net_track(exts->net, &exts->ns_tracker);
281#endif
282}
283
284#ifdef CONFIG_NET_CLS_ACT
285#define tcf_exts_for_each_action(i, a, exts) \
286 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
287#else
288#define tcf_exts_for_each_action(i, a, exts) \
289 for (; 0; (void)(i), (void)(a), (void)(exts))
290#endif
291
292#define tcf_act_for_each_action(i, a, actions) \
293 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
294
295static inline void
296tcf_exts_hw_stats_update(const struct tcf_exts *exts,
297 u64 bytes, u64 packets, u64 drops, u64 lastuse,
298 u8 used_hw_stats, bool used_hw_stats_valid)
299{
300#ifdef CONFIG_NET_CLS_ACT
301 int i;
302
303 for (i = 0; i < exts->nr_actions; i++) {
304 struct tc_action *a = exts->actions[i];
305
306 /* if stats from hw, just skip */
307 if (tcf_action_update_hw_stats(a)) {
308 preempt_disable();
309 tcf_action_stats_update(a, bytes, packets, drops,
310 lastuse, true);
311 preempt_enable();
312
313 a->used_hw_stats = used_hw_stats;
314 a->used_hw_stats_valid = used_hw_stats_valid;
315 }
316 }
317#endif
318}
319
320/**
321 * tcf_exts_has_actions - check if at least one action is present
322 * @exts: tc filter extensions handle
323 *
324 * Returns true if at least one action is present.
325 */
326static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
327{
328#ifdef CONFIG_NET_CLS_ACT
329 return exts->nr_actions;
330#else
331 return false;
332#endif
333}
334
335/**
336 * tcf_exts_exec - execute tc filter extensions
337 * @skb: socket buffer
338 * @exts: tc filter extensions handle
339 * @res: desired result
340 *
341 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
342 * a negative number if the filter must be considered unmatched or
343 * a positive action code (TC_ACT_*) which must be returned to the
344 * underlying layer.
345 */
346static inline int
347tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
348 struct tcf_result *res)
349{
350#ifdef CONFIG_NET_CLS_ACT
351 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
352#endif
353 return TC_ACT_OK;
354}
355
356int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
357 struct nlattr **tb, struct nlattr *rate_tlv,
358 struct tcf_exts *exts, u32 flags,
359 struct netlink_ext_ack *extack);
360int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
361 struct nlattr *rate_tlv, struct tcf_exts *exts,
362 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
363void tcf_exts_destroy(struct tcf_exts *exts);
364void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
365int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
366int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
367int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
368
369/**
370 * struct tcf_pkt_info - packet information
371 *
372 * @ptr: start of the pkt data
373 * @nexthdr: offset of the next header
374 */
375struct tcf_pkt_info {
376 unsigned char * ptr;
377 int nexthdr;
378};
379
380#ifdef CONFIG_NET_EMATCH
381
382struct tcf_ematch_ops;
383
384/**
385 * struct tcf_ematch - extended match (ematch)
386 *
387 * @matchid: identifier to allow userspace to reidentify a match
388 * @flags: flags specifying attributes and the relation to other matches
389 * @ops: the operations lookup table of the corresponding ematch module
390 * @datalen: length of the ematch specific configuration data
391 * @data: ematch specific data
392 * @net: the network namespace
393 */
394struct tcf_ematch {
395 struct tcf_ematch_ops * ops;
396 unsigned long data;
397 unsigned int datalen;
398 u16 matchid;
399 u16 flags;
400 struct net *net;
401};
402
403static inline int tcf_em_is_container(struct tcf_ematch *em)
404{
405 return !em->ops;
406}
407
408static inline int tcf_em_is_simple(struct tcf_ematch *em)
409{
410 return em->flags & TCF_EM_SIMPLE;
411}
412
413static inline int tcf_em_is_inverted(struct tcf_ematch *em)
414{
415 return em->flags & TCF_EM_INVERT;
416}
417
418static inline int tcf_em_last_match(struct tcf_ematch *em)
419{
420 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
421}
422
423static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
424{
425 if (tcf_em_last_match(em))
426 return 1;
427
428 if (result == 0 && em->flags & TCF_EM_REL_AND)
429 return 1;
430
431 if (result != 0 && em->flags & TCF_EM_REL_OR)
432 return 1;
433
434 return 0;
435}
436
437/**
438 * struct tcf_ematch_tree - ematch tree handle
439 *
440 * @hdr: ematch tree header supplied by userspace
441 * @matches: array of ematches
442 */
443struct tcf_ematch_tree {
444 struct tcf_ematch_tree_hdr hdr;
445 struct tcf_ematch * matches;
446
447};
448
449/**
450 * struct tcf_ematch_ops - ematch module operations
451 *
452 * @kind: identifier (kind) of this ematch module
453 * @datalen: length of expected configuration data (optional)
454 * @change: called during validation (optional)
455 * @match: called during ematch tree evaluation, must return 1/0
456 * @destroy: called during destroyage (optional)
457 * @dump: called during dumping process (optional)
458 * @owner: owner, must be set to THIS_MODULE
459 * @link: link to previous/next ematch module (internal use)
460 */
461struct tcf_ematch_ops {
462 int kind;
463 int datalen;
464 int (*change)(struct net *net, void *,
465 int, struct tcf_ematch *);
466 int (*match)(struct sk_buff *, struct tcf_ematch *,
467 struct tcf_pkt_info *);
468 void (*destroy)(struct tcf_ematch *);
469 int (*dump)(struct sk_buff *, struct tcf_ematch *);
470 struct module *owner;
471 struct list_head link;
472};
473
474int tcf_em_register(struct tcf_ematch_ops *);
475void tcf_em_unregister(struct tcf_ematch_ops *);
476int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
477 struct tcf_ematch_tree *);
478void tcf_em_tree_destroy(struct tcf_ematch_tree *);
479int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
480int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
481 struct tcf_pkt_info *);
482
483/**
484 * tcf_em_tree_match - evaulate an ematch tree
485 *
486 * @skb: socket buffer of the packet in question
487 * @tree: ematch tree to be used for evaluation
488 * @info: packet information examined by classifier
489 *
490 * This function matches @skb against the ematch tree in @tree by going
491 * through all ematches respecting their logic relations returning
492 * as soon as the result is obvious.
493 *
494 * Returns 1 if the ematch tree as-one matches, no ematches are configured
495 * or ematch is not enabled in the kernel, otherwise 0 is returned.
496 */
497static inline int tcf_em_tree_match(struct sk_buff *skb,
498 struct tcf_ematch_tree *tree,
499 struct tcf_pkt_info *info)
500{
501 if (tree->hdr.nmatches)
502 return __tcf_em_tree_match(skb, tree, info);
503 else
504 return 1;
505}
506
507#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
508
509#else /* CONFIG_NET_EMATCH */
510
511struct tcf_ematch_tree {
512};
513
514#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
515#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
516#define tcf_em_tree_dump(skb, t, tlv) (0)
517#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
518
519#endif /* CONFIG_NET_EMATCH */
520
521static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
522{
523 switch (layer) {
524 case TCF_LAYER_LINK:
525 return skb_mac_header(skb);
526 case TCF_LAYER_NETWORK:
527 return skb_network_header(skb);
528 case TCF_LAYER_TRANSPORT:
529 return skb_transport_header(skb);
530 }
531
532 return NULL;
533}
534
535static inline int tcf_valid_offset(const struct sk_buff *skb,
536 const unsigned char *ptr, const int len)
537{
538 return likely((ptr + len) <= skb_tail_pointer(skb) &&
539 ptr >= skb->head &&
540 (ptr <= (ptr + len)));
541}
542
543static inline int
544tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
545 struct netlink_ext_ack *extack)
546{
547 char indev[IFNAMSIZ];
548 struct net_device *dev;
549
550 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
551 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
552 "Interface name too long");
553 return -EINVAL;
554 }
555 dev = __dev_get_by_name(net, indev);
556 if (!dev) {
557 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
558 "Network device not found");
559 return -ENODEV;
560 }
561 return dev->ifindex;
562}
563
564static inline bool
565tcf_match_indev(struct sk_buff *skb, int ifindex)
566{
567 if (!ifindex)
568 return true;
569 if (!skb->skb_iif)
570 return false;
571 return ifindex == skb->skb_iif;
572}
573
574int tc_setup_offload_action(struct flow_action *flow_action,
575 const struct tcf_exts *exts,
576 struct netlink_ext_ack *extack);
577void tc_cleanup_offload_action(struct flow_action *flow_action);
578int tc_setup_action(struct flow_action *flow_action,
579 struct tc_action *actions[],
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 unsigned long cookie;
774};
775
776enum tc_clsbpf_command {
777 TC_CLSBPF_OFFLOAD,
778 TC_CLSBPF_STATS,
779};
780
781struct tc_cls_bpf_offload {
782 struct flow_cls_common_offload common;
783 enum tc_clsbpf_command command;
784 struct tcf_exts *exts;
785 struct bpf_prog *prog;
786 struct bpf_prog *oldprog;
787 const char *name;
788 bool exts_integrated;
789};
790
791struct tc_mqprio_qopt_offload {
792 /* struct tc_mqprio_qopt must always be the first element */
793 struct tc_mqprio_qopt qopt;
794 u16 mode;
795 u16 shaper;
796 u32 flags;
797 u64 min_rate[TC_QOPT_MAX_QUEUE];
798 u64 max_rate[TC_QOPT_MAX_QUEUE];
799};
800
801/* This structure holds cookie structure that is passed from user
802 * to the kernel for actions and classifiers
803 */
804struct tc_cookie {
805 u8 *data;
806 u32 len;
807 struct rcu_head rcu;
808};
809
810struct tc_qopt_offload_stats {
811 struct gnet_stats_basic_sync *bstats;
812 struct gnet_stats_queue *qstats;
813};
814
815enum tc_mq_command {
816 TC_MQ_CREATE,
817 TC_MQ_DESTROY,
818 TC_MQ_STATS,
819 TC_MQ_GRAFT,
820};
821
822struct tc_mq_opt_offload_graft_params {
823 unsigned long queue;
824 u32 child_handle;
825};
826
827struct tc_mq_qopt_offload {
828 enum tc_mq_command command;
829 u32 handle;
830 union {
831 struct tc_qopt_offload_stats stats;
832 struct tc_mq_opt_offload_graft_params graft_params;
833 };
834};
835
836enum tc_htb_command {
837 /* Root */
838 TC_HTB_CREATE, /* Initialize HTB offload. */
839 TC_HTB_DESTROY, /* Destroy HTB offload. */
840
841 /* Classes */
842 /* Allocate qid and create leaf. */
843 TC_HTB_LEAF_ALLOC_QUEUE,
844 /* Convert leaf to inner, preserve and return qid, create new leaf. */
845 TC_HTB_LEAF_TO_INNER,
846 /* Delete leaf, while siblings remain. */
847 TC_HTB_LEAF_DEL,
848 /* Delete leaf, convert parent to leaf, preserving qid. */
849 TC_HTB_LEAF_DEL_LAST,
850 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
851 TC_HTB_LEAF_DEL_LAST_FORCE,
852 /* Modify parameters of a node. */
853 TC_HTB_NODE_MODIFY,
854
855 /* Class qdisc */
856 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
857};
858
859struct tc_htb_qopt_offload {
860 struct netlink_ext_ack *extack;
861 enum tc_htb_command command;
862 u32 parent_classid;
863 u16 classid;
864 u16 qid;
865 u64 rate;
866 u64 ceil;
867};
868
869#define TC_HTB_CLASSID_ROOT U32_MAX
870
871enum tc_red_command {
872 TC_RED_REPLACE,
873 TC_RED_DESTROY,
874 TC_RED_STATS,
875 TC_RED_XSTATS,
876 TC_RED_GRAFT,
877};
878
879struct tc_red_qopt_offload_params {
880 u32 min;
881 u32 max;
882 u32 probability;
883 u32 limit;
884 bool is_ecn;
885 bool is_harddrop;
886 bool is_nodrop;
887 struct gnet_stats_queue *qstats;
888};
889
890struct tc_red_qopt_offload {
891 enum tc_red_command command;
892 u32 handle;
893 u32 parent;
894 union {
895 struct tc_red_qopt_offload_params set;
896 struct tc_qopt_offload_stats stats;
897 struct red_stats *xstats;
898 u32 child_handle;
899 };
900};
901
902enum tc_gred_command {
903 TC_GRED_REPLACE,
904 TC_GRED_DESTROY,
905 TC_GRED_STATS,
906};
907
908struct tc_gred_vq_qopt_offload_params {
909 bool present;
910 u32 limit;
911 u32 prio;
912 u32 min;
913 u32 max;
914 bool is_ecn;
915 bool is_harddrop;
916 u32 probability;
917 /* Only need backlog, see struct tc_prio_qopt_offload_params */
918 u32 *backlog;
919};
920
921struct tc_gred_qopt_offload_params {
922 bool grio_on;
923 bool wred_on;
924 unsigned int dp_cnt;
925 unsigned int dp_def;
926 struct gnet_stats_queue *qstats;
927 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
928};
929
930struct tc_gred_qopt_offload_stats {
931 struct gnet_stats_basic_sync bstats[MAX_DPs];
932 struct gnet_stats_queue qstats[MAX_DPs];
933 struct red_stats *xstats[MAX_DPs];
934};
935
936struct tc_gred_qopt_offload {
937 enum tc_gred_command command;
938 u32 handle;
939 u32 parent;
940 union {
941 struct tc_gred_qopt_offload_params set;
942 struct tc_gred_qopt_offload_stats stats;
943 };
944};
945
946enum tc_prio_command {
947 TC_PRIO_REPLACE,
948 TC_PRIO_DESTROY,
949 TC_PRIO_STATS,
950 TC_PRIO_GRAFT,
951};
952
953struct tc_prio_qopt_offload_params {
954 int bands;
955 u8 priomap[TC_PRIO_MAX + 1];
956 /* At the point of un-offloading the Qdisc, the reported backlog and
957 * qlen need to be reduced by the portion that is in HW.
958 */
959 struct gnet_stats_queue *qstats;
960};
961
962struct tc_prio_qopt_offload_graft_params {
963 u8 band;
964 u32 child_handle;
965};
966
967struct tc_prio_qopt_offload {
968 enum tc_prio_command command;
969 u32 handle;
970 u32 parent;
971 union {
972 struct tc_prio_qopt_offload_params replace_params;
973 struct tc_qopt_offload_stats stats;
974 struct tc_prio_qopt_offload_graft_params graft_params;
975 };
976};
977
978enum tc_root_command {
979 TC_ROOT_GRAFT,
980};
981
982struct tc_root_qopt_offload {
983 enum tc_root_command command;
984 u32 handle;
985 bool ingress;
986};
987
988enum tc_ets_command {
989 TC_ETS_REPLACE,
990 TC_ETS_DESTROY,
991 TC_ETS_STATS,
992 TC_ETS_GRAFT,
993};
994
995struct tc_ets_qopt_offload_replace_params {
996 unsigned int bands;
997 u8 priomap[TC_PRIO_MAX + 1];
998 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
999 unsigned int weights[TCQ_ETS_MAX_BANDS];
1000 struct gnet_stats_queue *qstats;
1001};
1002
1003struct tc_ets_qopt_offload_graft_params {
1004 u8 band;
1005 u32 child_handle;
1006};
1007
1008struct tc_ets_qopt_offload {
1009 enum tc_ets_command command;
1010 u32 handle;
1011 u32 parent;
1012 union {
1013 struct tc_ets_qopt_offload_replace_params replace_params;
1014 struct tc_qopt_offload_stats stats;
1015 struct tc_ets_qopt_offload_graft_params graft_params;
1016 };
1017};
1018
1019enum tc_tbf_command {
1020 TC_TBF_REPLACE,
1021 TC_TBF_DESTROY,
1022 TC_TBF_STATS,
1023 TC_TBF_GRAFT,
1024};
1025
1026struct tc_tbf_qopt_offload_replace_params {
1027 struct psched_ratecfg rate;
1028 u32 max_size;
1029 struct gnet_stats_queue *qstats;
1030};
1031
1032struct tc_tbf_qopt_offload {
1033 enum tc_tbf_command command;
1034 u32 handle;
1035 u32 parent;
1036 union {
1037 struct tc_tbf_qopt_offload_replace_params replace_params;
1038 struct tc_qopt_offload_stats stats;
1039 u32 child_handle;
1040 };
1041};
1042
1043enum tc_fifo_command {
1044 TC_FIFO_REPLACE,
1045 TC_FIFO_DESTROY,
1046 TC_FIFO_STATS,
1047};
1048
1049struct tc_fifo_qopt_offload {
1050 enum tc_fifo_command command;
1051 u32 handle;
1052 u32 parent;
1053 union {
1054 struct tc_qopt_offload_stats stats;
1055 };
1056};
1057
1058#ifdef CONFIG_NET_CLS_ACT
1059DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1060void tc_skb_ext_tc_enable(void);
1061void tc_skb_ext_tc_disable(void);
1062#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1063#else /* CONFIG_NET_CLS_ACT */
1064static inline void tc_skb_ext_tc_enable(void) { }
1065static inline void tc_skb_ext_tc_disable(void) { }
1066#define tc_skb_ext_tc_enabled() false
1067#endif
1068
1069#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#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
77static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
78{
79 WARN_ON(tcf_block_shared(block));
80 return block->q;
81}
82
83int tcf_classify(struct sk_buff *skb,
84 const struct tcf_block *block,
85 const struct tcf_proto *tp, struct tcf_result *res,
86 bool compat_mode);
87
88static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
89 struct tcf_walker *arg,
90 void *filter)
91{
92 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
93 arg->stop = 1;
94 return false;
95 }
96
97 arg->count++;
98 return true;
99}
100
101#else
102static inline bool tcf_block_shared(struct tcf_block *block)
103{
104 return false;
105}
106
107static inline bool tcf_block_non_null_shared(struct tcf_block *block)
108{
109 return false;
110}
111
112static inline
113int tcf_block_get(struct tcf_block **p_block,
114 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
115 struct netlink_ext_ack *extack)
116{
117 return 0;
118}
119
120static inline
121int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
122 struct tcf_block_ext_info *ei,
123 struct netlink_ext_ack *extack)
124{
125 return 0;
126}
127
128static inline void tcf_block_put(struct tcf_block *block)
129{
130}
131
132static inline
133void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
134 struct tcf_block_ext_info *ei)
135{
136}
137
138static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
139{
140 return NULL;
141}
142
143static inline int tcf_classify(struct sk_buff *skb,
144 const struct tcf_block *block,
145 const struct tcf_proto *tp,
146 struct tcf_result *res, bool compat_mode)
147{
148 return TC_ACT_UNSPEC;
149}
150
151#endif
152
153static inline unsigned long
154__cls_set_class(unsigned long *clp, unsigned long cl)
155{
156 return xchg(clp, cl);
157}
158
159static inline void
160__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
161{
162 unsigned long cl;
163
164 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
165 cl = __cls_set_class(&r->class, cl);
166 if (cl)
167 q->ops->cl_ops->unbind_tcf(q, cl);
168}
169
170static inline void
171tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
172{
173 struct Qdisc *q = tp->chain->block->q;
174
175 /* Check q as it is not set for shared blocks. In that case,
176 * setting class is not supported.
177 */
178 if (!q)
179 return;
180 sch_tree_lock(q);
181 __tcf_bind_filter(q, r, base);
182 sch_tree_unlock(q);
183}
184
185static inline void
186__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
187{
188 unsigned long cl;
189
190 if ((cl = __cls_set_class(&r->class, 0)) != 0)
191 q->ops->cl_ops->unbind_tcf(q, cl);
192}
193
194static inline void
195tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
196{
197 struct Qdisc *q = tp->chain->block->q;
198
199 if (!q)
200 return;
201 __tcf_unbind_filter(q, r);
202}
203
204static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
205 void *q, struct tcf_result *res,
206 unsigned long base)
207{
208 if (res->classid == classid) {
209 if (cl)
210 __tcf_bind_filter(q, res, base);
211 else
212 __tcf_unbind_filter(q, res);
213 }
214}
215
216struct tcf_exts {
217#ifdef CONFIG_NET_CLS_ACT
218 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
219 int nr_actions;
220 struct tc_action **actions;
221 struct net *net;
222 netns_tracker ns_tracker;
223 struct tcf_exts_miss_cookie_node *miss_cookie_node;
224#endif
225 /* Map to export classifier specific extension TLV types to the
226 * generic extensions API. Unsupported extensions must be set to 0.
227 */
228 int action;
229 int police;
230};
231
232static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
233 int action, int police)
234{
235#ifdef CONFIG_NET_CLS
236 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false);
237#else
238 return -EOPNOTSUPP;
239#endif
240}
241
242/* Return false if the netns is being destroyed in cleanup_net(). Callers
243 * need to do cleanup synchronously in this case, otherwise may race with
244 * tc_action_net_exit(). Return true for other cases.
245 */
246static inline bool tcf_exts_get_net(struct tcf_exts *exts)
247{
248#ifdef CONFIG_NET_CLS_ACT
249 exts->net = maybe_get_net(exts->net);
250 if (exts->net)
251 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
252 return exts->net != NULL;
253#else
254 return true;
255#endif
256}
257
258static inline void tcf_exts_put_net(struct tcf_exts *exts)
259{
260#ifdef CONFIG_NET_CLS_ACT
261 if (exts->net)
262 put_net_track(exts->net, &exts->ns_tracker);
263#endif
264}
265
266#ifdef CONFIG_NET_CLS_ACT
267#define tcf_exts_for_each_action(i, a, exts) \
268 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
269#else
270#define tcf_exts_for_each_action(i, a, exts) \
271 for (; 0; (void)(i), (void)(a), (void)(exts))
272#endif
273
274#define tcf_act_for_each_action(i, a, actions) \
275 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
276
277static inline bool tc_act_in_hw(struct tc_action *act)
278{
279 return !!act->in_hw_count;
280}
281
282static inline void
283tcf_exts_hw_stats_update(const struct tcf_exts *exts,
284 struct flow_stats *stats,
285 bool use_act_stats)
286{
287#ifdef CONFIG_NET_CLS_ACT
288 int i;
289
290 for (i = 0; i < exts->nr_actions; i++) {
291 struct tc_action *a = exts->actions[i];
292
293 if (use_act_stats || tc_act_in_hw(a)) {
294 if (!tcf_action_update_hw_stats(a))
295 continue;
296 }
297
298 preempt_disable();
299 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops,
300 stats->lastused, true);
301 preempt_enable();
302
303 a->used_hw_stats = stats->used_hw_stats;
304 a->used_hw_stats_valid = stats->used_hw_stats_valid;
305 }
306#endif
307}
308
309/**
310 * tcf_exts_has_actions - check if at least one action is present
311 * @exts: tc filter extensions handle
312 *
313 * Returns true if at least one action is present.
314 */
315static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
316{
317#ifdef CONFIG_NET_CLS_ACT
318 return exts->nr_actions;
319#else
320 return false;
321#endif
322}
323
324/**
325 * tcf_exts_exec - execute tc filter extensions
326 * @skb: socket buffer
327 * @exts: tc filter extensions handle
328 * @res: desired result
329 *
330 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
331 * a negative number if the filter must be considered unmatched or
332 * a positive action code (TC_ACT_*) which must be returned to the
333 * underlying layer.
334 */
335static inline int
336tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
337 struct tcf_result *res)
338{
339#ifdef CONFIG_NET_CLS_ACT
340 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
341#endif
342 return TC_ACT_OK;
343}
344
345static inline int
346tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
347 struct tcf_result *res)
348{
349#ifdef CONFIG_NET_CLS_ACT
350 return tcf_action_exec(skb, exts->actions + act_index,
351 exts->nr_actions - act_index, res);
352#else
353 return TC_ACT_OK;
354#endif
355}
356
357int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
358 struct nlattr **tb, struct nlattr *rate_tlv,
359 struct tcf_exts *exts, u32 flags,
360 struct netlink_ext_ack *extack);
361int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
362 struct nlattr *rate_tlv, struct tcf_exts *exts,
363 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
364void tcf_exts_destroy(struct tcf_exts *exts);
365void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
366int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
367int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
368int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
369
370/**
371 * struct tcf_pkt_info - packet information
372 *
373 * @ptr: start of the pkt data
374 * @nexthdr: offset of the next header
375 */
376struct tcf_pkt_info {
377 unsigned char * ptr;
378 int nexthdr;
379};
380
381#ifdef CONFIG_NET_EMATCH
382
383struct tcf_ematch_ops;
384
385/**
386 * struct tcf_ematch - extended match (ematch)
387 *
388 * @matchid: identifier to allow userspace to reidentify a match
389 * @flags: flags specifying attributes and the relation to other matches
390 * @ops: the operations lookup table of the corresponding ematch module
391 * @datalen: length of the ematch specific configuration data
392 * @data: ematch specific data
393 * @net: the network namespace
394 */
395struct tcf_ematch {
396 struct tcf_ematch_ops * ops;
397 unsigned long data;
398 unsigned int datalen;
399 u16 matchid;
400 u16 flags;
401 struct net *net;
402};
403
404static inline int tcf_em_is_container(struct tcf_ematch *em)
405{
406 return !em->ops;
407}
408
409static inline int tcf_em_is_simple(struct tcf_ematch *em)
410{
411 return em->flags & TCF_EM_SIMPLE;
412}
413
414static inline int tcf_em_is_inverted(struct tcf_ematch *em)
415{
416 return em->flags & TCF_EM_INVERT;
417}
418
419static inline int tcf_em_last_match(struct tcf_ematch *em)
420{
421 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
422}
423
424static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
425{
426 if (tcf_em_last_match(em))
427 return 1;
428
429 if (result == 0 && em->flags & TCF_EM_REL_AND)
430 return 1;
431
432 if (result != 0 && em->flags & TCF_EM_REL_OR)
433 return 1;
434
435 return 0;
436}
437
438/**
439 * struct tcf_ematch_tree - ematch tree handle
440 *
441 * @hdr: ematch tree header supplied by userspace
442 * @matches: array of ematches
443 */
444struct tcf_ematch_tree {
445 struct tcf_ematch_tree_hdr hdr;
446 struct tcf_ematch * matches;
447
448};
449
450/**
451 * struct tcf_ematch_ops - ematch module operations
452 *
453 * @kind: identifier (kind) of this ematch module
454 * @datalen: length of expected configuration data (optional)
455 * @change: called during validation (optional)
456 * @match: called during ematch tree evaluation, must return 1/0
457 * @destroy: called during destroyage (optional)
458 * @dump: called during dumping process (optional)
459 * @owner: owner, must be set to THIS_MODULE
460 * @link: link to previous/next ematch module (internal use)
461 */
462struct tcf_ematch_ops {
463 int kind;
464 int datalen;
465 int (*change)(struct net *net, void *,
466 int, struct tcf_ematch *);
467 int (*match)(struct sk_buff *, struct tcf_ematch *,
468 struct tcf_pkt_info *);
469 void (*destroy)(struct tcf_ematch *);
470 int (*dump)(struct sk_buff *, struct tcf_ematch *);
471 struct module *owner;
472 struct list_head link;
473};
474
475int tcf_em_register(struct tcf_ematch_ops *);
476void tcf_em_unregister(struct tcf_ematch_ops *);
477int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
478 struct tcf_ematch_tree *);
479void tcf_em_tree_destroy(struct tcf_ematch_tree *);
480int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
481int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
482 struct tcf_pkt_info *);
483
484/**
485 * tcf_em_tree_match - evaulate an ematch tree
486 *
487 * @skb: socket buffer of the packet in question
488 * @tree: ematch tree to be used for evaluation
489 * @info: packet information examined by classifier
490 *
491 * This function matches @skb against the ematch tree in @tree by going
492 * through all ematches respecting their logic relations returning
493 * as soon as the result is obvious.
494 *
495 * Returns 1 if the ematch tree as-one matches, no ematches are configured
496 * or ematch is not enabled in the kernel, otherwise 0 is returned.
497 */
498static inline int tcf_em_tree_match(struct sk_buff *skb,
499 struct tcf_ematch_tree *tree,
500 struct tcf_pkt_info *info)
501{
502 if (tree->hdr.nmatches)
503 return __tcf_em_tree_match(skb, tree, info);
504 else
505 return 1;
506}
507
508#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
509
510#else /* CONFIG_NET_EMATCH */
511
512struct tcf_ematch_tree {
513};
514
515#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
516#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
517#define tcf_em_tree_dump(skb, t, tlv) (0)
518#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
519
520#endif /* CONFIG_NET_EMATCH */
521
522static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
523{
524 switch (layer) {
525 case TCF_LAYER_LINK:
526 return skb_mac_header(skb);
527 case TCF_LAYER_NETWORK:
528 return skb_network_header(skb);
529 case TCF_LAYER_TRANSPORT:
530 return skb_transport_header(skb);
531 }
532
533 return NULL;
534}
535
536static inline int tcf_valid_offset(const struct sk_buff *skb,
537 const unsigned char *ptr, const int len)
538{
539 return likely((ptr + len) <= skb_tail_pointer(skb) &&
540 ptr >= skb->head &&
541 (ptr <= (ptr + len)));
542}
543
544static inline int
545tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
546 struct netlink_ext_ack *extack)
547{
548 char indev[IFNAMSIZ];
549 struct net_device *dev;
550
551 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
552 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
553 "Interface name too long");
554 return -EINVAL;
555 }
556 dev = __dev_get_by_name(net, indev);
557 if (!dev) {
558 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
559 "Network device not found");
560 return -ENODEV;
561 }
562 return dev->ifindex;
563}
564
565static inline bool
566tcf_match_indev(struct sk_buff *skb, int ifindex)
567{
568 if (!ifindex)
569 return true;
570 if (!skb->skb_iif)
571 return false;
572 return ifindex == skb->skb_iif;
573}
574
575int tc_setup_offload_action(struct flow_action *flow_action,
576 const struct tcf_exts *exts,
577 struct netlink_ext_ack *extack);
578void tc_cleanup_offload_action(struct flow_action *flow_action);
579int tc_setup_action(struct flow_action *flow_action,
580 struct tc_action *actions[],
581 u32 miss_cookie_base,
582 struct netlink_ext_ack *extack);
583
584int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
585 void *type_data, bool err_stop, bool rtnl_held);
586int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
587 enum tc_setup_type type, void *type_data, bool err_stop,
588 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
589int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
590 enum tc_setup_type type, void *type_data, bool err_stop,
591 u32 *old_flags, unsigned int *old_in_hw_count,
592 u32 *new_flags, unsigned int *new_in_hw_count,
593 bool rtnl_held);
594int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
595 enum tc_setup_type type, void *type_data, bool err_stop,
596 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
597int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
598 bool add, flow_setup_cb_t *cb,
599 enum tc_setup_type type, void *type_data,
600 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
601unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
602
603#ifdef CONFIG_NET_CLS_ACT
604int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
605 enum flow_block_binder_type binder_type,
606 struct nlattr *block_index_attr,
607 struct netlink_ext_ack *extack);
608void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
609int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
610 struct netlink_ext_ack *extack);
611struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
612 struct sk_buff **to_free, int *ret);
613int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
614#else
615static inline int 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)
619{
620 return 0;
621}
622
623static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
624{
625}
626
627static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
628 struct netlink_ext_ack *extack)
629{
630 return 0;
631}
632
633static inline struct sk_buff *
634tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
635 struct sk_buff **to_free, int *ret)
636{
637 return skb;
638}
639
640static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
641{
642 return 0;
643}
644#endif
645
646struct tc_cls_u32_knode {
647 struct tcf_exts *exts;
648 struct tcf_result *res;
649 struct tc_u32_sel *sel;
650 u32 handle;
651 u32 val;
652 u32 mask;
653 u32 link_handle;
654 u8 fshift;
655};
656
657struct tc_cls_u32_hnode {
658 u32 handle;
659 u32 prio;
660 unsigned int divisor;
661};
662
663enum tc_clsu32_command {
664 TC_CLSU32_NEW_KNODE,
665 TC_CLSU32_REPLACE_KNODE,
666 TC_CLSU32_DELETE_KNODE,
667 TC_CLSU32_NEW_HNODE,
668 TC_CLSU32_REPLACE_HNODE,
669 TC_CLSU32_DELETE_HNODE,
670};
671
672struct tc_cls_u32_offload {
673 struct flow_cls_common_offload common;
674 /* knode values */
675 enum tc_clsu32_command command;
676 union {
677 struct tc_cls_u32_knode knode;
678 struct tc_cls_u32_hnode hnode;
679 };
680};
681
682static inline bool tc_can_offload(const struct net_device *dev)
683{
684 return dev->features & NETIF_F_HW_TC;
685}
686
687static inline bool tc_can_offload_extack(const struct net_device *dev,
688 struct netlink_ext_ack *extack)
689{
690 bool can = tc_can_offload(dev);
691
692 if (!can)
693 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
694
695 return can;
696}
697
698static inline bool
699tc_cls_can_offload_and_chain0(const struct net_device *dev,
700 struct flow_cls_common_offload *common)
701{
702 if (!tc_can_offload_extack(dev, common->extack))
703 return false;
704 if (common->chain_index) {
705 NL_SET_ERR_MSG(common->extack,
706 "Driver supports only offload of chain 0");
707 return false;
708 }
709 return true;
710}
711
712static inline bool tc_skip_hw(u32 flags)
713{
714 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
715}
716
717static inline bool tc_skip_sw(u32 flags)
718{
719 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
720}
721
722/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
723static inline bool tc_flags_valid(u32 flags)
724{
725 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
726 TCA_CLS_FLAGS_VERBOSE))
727 return false;
728
729 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
730 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
731 return false;
732
733 return true;
734}
735
736static inline bool tc_in_hw(u32 flags)
737{
738 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
739}
740
741static inline void
742tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
743 const struct tcf_proto *tp, u32 flags,
744 struct netlink_ext_ack *extack)
745{
746 cls_common->chain_index = tp->chain->index;
747 cls_common->protocol = tp->protocol;
748 cls_common->prio = tp->prio >> 16;
749 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
750 cls_common->extack = extack;
751}
752
753#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
754static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
755{
756 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
757
758 if (tc_skb_ext)
759 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
760 return tc_skb_ext;
761}
762#endif
763
764enum tc_matchall_command {
765 TC_CLSMATCHALL_REPLACE,
766 TC_CLSMATCHALL_DESTROY,
767 TC_CLSMATCHALL_STATS,
768};
769
770struct tc_cls_matchall_offload {
771 struct flow_cls_common_offload common;
772 enum tc_matchall_command command;
773 struct flow_rule *rule;
774 struct flow_stats stats;
775 bool use_act_stats;
776 unsigned long cookie;
777};
778
779enum tc_clsbpf_command {
780 TC_CLSBPF_OFFLOAD,
781 TC_CLSBPF_STATS,
782};
783
784struct tc_cls_bpf_offload {
785 struct flow_cls_common_offload common;
786 enum tc_clsbpf_command command;
787 struct tcf_exts *exts;
788 struct bpf_prog *prog;
789 struct bpf_prog *oldprog;
790 const char *name;
791 bool exts_integrated;
792};
793
794/* This structure holds cookie structure that is passed from user
795 * to the kernel for actions and classifiers
796 */
797struct tc_cookie {
798 u8 *data;
799 u32 len;
800 struct rcu_head rcu;
801};
802
803struct tc_qopt_offload_stats {
804 struct gnet_stats_basic_sync *bstats;
805 struct gnet_stats_queue *qstats;
806};
807
808enum tc_mq_command {
809 TC_MQ_CREATE,
810 TC_MQ_DESTROY,
811 TC_MQ_STATS,
812 TC_MQ_GRAFT,
813};
814
815struct tc_mq_opt_offload_graft_params {
816 unsigned long queue;
817 u32 child_handle;
818};
819
820struct tc_mq_qopt_offload {
821 enum tc_mq_command command;
822 u32 handle;
823 union {
824 struct tc_qopt_offload_stats stats;
825 struct tc_mq_opt_offload_graft_params graft_params;
826 };
827};
828
829enum tc_htb_command {
830 /* Root */
831 TC_HTB_CREATE, /* Initialize HTB offload. */
832 TC_HTB_DESTROY, /* Destroy HTB offload. */
833
834 /* Classes */
835 /* Allocate qid and create leaf. */
836 TC_HTB_LEAF_ALLOC_QUEUE,
837 /* Convert leaf to inner, preserve and return qid, create new leaf. */
838 TC_HTB_LEAF_TO_INNER,
839 /* Delete leaf, while siblings remain. */
840 TC_HTB_LEAF_DEL,
841 /* Delete leaf, convert parent to leaf, preserving qid. */
842 TC_HTB_LEAF_DEL_LAST,
843 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
844 TC_HTB_LEAF_DEL_LAST_FORCE,
845 /* Modify parameters of a node. */
846 TC_HTB_NODE_MODIFY,
847
848 /* Class qdisc */
849 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
850};
851
852struct tc_htb_qopt_offload {
853 struct netlink_ext_ack *extack;
854 enum tc_htb_command command;
855 u32 parent_classid;
856 u16 classid;
857 u16 qid;
858 u32 quantum;
859 u64 rate;
860 u64 ceil;
861 u8 prio;
862};
863
864#define TC_HTB_CLASSID_ROOT U32_MAX
865
866enum tc_red_command {
867 TC_RED_REPLACE,
868 TC_RED_DESTROY,
869 TC_RED_STATS,
870 TC_RED_XSTATS,
871 TC_RED_GRAFT,
872};
873
874struct tc_red_qopt_offload_params {
875 u32 min;
876 u32 max;
877 u32 probability;
878 u32 limit;
879 bool is_ecn;
880 bool is_harddrop;
881 bool is_nodrop;
882 struct gnet_stats_queue *qstats;
883};
884
885struct tc_red_qopt_offload {
886 enum tc_red_command command;
887 u32 handle;
888 u32 parent;
889 union {
890 struct tc_red_qopt_offload_params set;
891 struct tc_qopt_offload_stats stats;
892 struct red_stats *xstats;
893 u32 child_handle;
894 };
895};
896
897enum tc_gred_command {
898 TC_GRED_REPLACE,
899 TC_GRED_DESTROY,
900 TC_GRED_STATS,
901};
902
903struct tc_gred_vq_qopt_offload_params {
904 bool present;
905 u32 limit;
906 u32 prio;
907 u32 min;
908 u32 max;
909 bool is_ecn;
910 bool is_harddrop;
911 u32 probability;
912 /* Only need backlog, see struct tc_prio_qopt_offload_params */
913 u32 *backlog;
914};
915
916struct tc_gred_qopt_offload_params {
917 bool grio_on;
918 bool wred_on;
919 unsigned int dp_cnt;
920 unsigned int dp_def;
921 struct gnet_stats_queue *qstats;
922 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
923};
924
925struct tc_gred_qopt_offload_stats {
926 struct gnet_stats_basic_sync bstats[MAX_DPs];
927 struct gnet_stats_queue qstats[MAX_DPs];
928 struct red_stats *xstats[MAX_DPs];
929};
930
931struct tc_gred_qopt_offload {
932 enum tc_gred_command command;
933 u32 handle;
934 u32 parent;
935 union {
936 struct tc_gred_qopt_offload_params set;
937 struct tc_gred_qopt_offload_stats stats;
938 };
939};
940
941enum tc_prio_command {
942 TC_PRIO_REPLACE,
943 TC_PRIO_DESTROY,
944 TC_PRIO_STATS,
945 TC_PRIO_GRAFT,
946};
947
948struct tc_prio_qopt_offload_params {
949 int bands;
950 u8 priomap[TC_PRIO_MAX + 1];
951 /* At the point of un-offloading the Qdisc, the reported backlog and
952 * qlen need to be reduced by the portion that is in HW.
953 */
954 struct gnet_stats_queue *qstats;
955};
956
957struct tc_prio_qopt_offload_graft_params {
958 u8 band;
959 u32 child_handle;
960};
961
962struct tc_prio_qopt_offload {
963 enum tc_prio_command command;
964 u32 handle;
965 u32 parent;
966 union {
967 struct tc_prio_qopt_offload_params replace_params;
968 struct tc_qopt_offload_stats stats;
969 struct tc_prio_qopt_offload_graft_params graft_params;
970 };
971};
972
973enum tc_root_command {
974 TC_ROOT_GRAFT,
975};
976
977struct tc_root_qopt_offload {
978 enum tc_root_command command;
979 u32 handle;
980 bool ingress;
981};
982
983enum tc_ets_command {
984 TC_ETS_REPLACE,
985 TC_ETS_DESTROY,
986 TC_ETS_STATS,
987 TC_ETS_GRAFT,
988};
989
990struct tc_ets_qopt_offload_replace_params {
991 unsigned int bands;
992 u8 priomap[TC_PRIO_MAX + 1];
993 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
994 unsigned int weights[TCQ_ETS_MAX_BANDS];
995 struct gnet_stats_queue *qstats;
996};
997
998struct tc_ets_qopt_offload_graft_params {
999 u8 band;
1000 u32 child_handle;
1001};
1002
1003struct tc_ets_qopt_offload {
1004 enum tc_ets_command command;
1005 u32 handle;
1006 u32 parent;
1007 union {
1008 struct tc_ets_qopt_offload_replace_params replace_params;
1009 struct tc_qopt_offload_stats stats;
1010 struct tc_ets_qopt_offload_graft_params graft_params;
1011 };
1012};
1013
1014enum tc_tbf_command {
1015 TC_TBF_REPLACE,
1016 TC_TBF_DESTROY,
1017 TC_TBF_STATS,
1018 TC_TBF_GRAFT,
1019};
1020
1021struct tc_tbf_qopt_offload_replace_params {
1022 struct psched_ratecfg rate;
1023 u32 max_size;
1024 struct gnet_stats_queue *qstats;
1025};
1026
1027struct tc_tbf_qopt_offload {
1028 enum tc_tbf_command command;
1029 u32 handle;
1030 u32 parent;
1031 union {
1032 struct tc_tbf_qopt_offload_replace_params replace_params;
1033 struct tc_qopt_offload_stats stats;
1034 u32 child_handle;
1035 };
1036};
1037
1038enum tc_fifo_command {
1039 TC_FIFO_REPLACE,
1040 TC_FIFO_DESTROY,
1041 TC_FIFO_STATS,
1042};
1043
1044struct tc_fifo_qopt_offload {
1045 enum tc_fifo_command command;
1046 u32 handle;
1047 u32 parent;
1048 union {
1049 struct tc_qopt_offload_stats stats;
1050 };
1051};
1052
1053#ifdef CONFIG_NET_CLS_ACT
1054DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1055void tc_skb_ext_tc_enable(void);
1056void tc_skb_ext_tc_disable(void);
1057#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1058#else /* CONFIG_NET_CLS_ACT */
1059static inline void tc_skb_ext_tc_enable(void) { }
1060static inline void tc_skb_ext_tc_disable(void) { }
1061#define tc_skb_ext_tc_enabled() false
1062#endif
1063
1064#endif