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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);
26int 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, const struct tcf_proto *tp,
80 struct tcf_result *res, bool compat_mode);
81int tcf_classify_ingress(struct sk_buff *skb,
82 const struct tcf_block *ingress_block,
83 const struct tcf_proto *tp, struct tcf_result *res,
84 bool compat_mode);
85
86#else
87static inline bool tcf_block_shared(struct tcf_block *block)
88{
89 return false;
90}
91
92static inline bool tcf_block_non_null_shared(struct tcf_block *block)
93{
94 return false;
95}
96
97static inline
98int tcf_block_get(struct tcf_block **p_block,
99 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
100 struct netlink_ext_ack *extack)
101{
102 return 0;
103}
104
105static inline
106int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
107 struct tcf_block_ext_info *ei,
108 struct netlink_ext_ack *extack)
109{
110 return 0;
111}
112
113static inline void tcf_block_put(struct tcf_block *block)
114{
115}
116
117static inline
118void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
119 struct tcf_block_ext_info *ei)
120{
121}
122
123static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
124{
125 return NULL;
126}
127
128static inline
129int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
130 void *cb_priv)
131{
132 return 0;
133}
134
135static inline
136void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
137 void *cb_priv)
138{
139}
140
141static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
142 struct tcf_result *res, bool compat_mode)
143{
144 return TC_ACT_UNSPEC;
145}
146
147static inline int tcf_classify_ingress(struct sk_buff *skb,
148 const struct tcf_block *ingress_block,
149 const struct tcf_proto *tp,
150 struct tcf_result *res, bool compat_mode)
151{
152 return TC_ACT_UNSPEC;
153}
154
155#endif
156
157static inline unsigned long
158__cls_set_class(unsigned long *clp, unsigned long cl)
159{
160 return xchg(clp, cl);
161}
162
163static inline void
164__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
165{
166 unsigned long cl;
167
168 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
169 cl = __cls_set_class(&r->class, cl);
170 if (cl)
171 q->ops->cl_ops->unbind_tcf(q, cl);
172}
173
174static inline void
175tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
176{
177 struct Qdisc *q = tp->chain->block->q;
178
179 /* Check q as it is not set for shared blocks. In that case,
180 * setting class is not supported.
181 */
182 if (!q)
183 return;
184 sch_tree_lock(q);
185 __tcf_bind_filter(q, r, base);
186 sch_tree_unlock(q);
187}
188
189static inline void
190__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
191{
192 unsigned long cl;
193
194 if ((cl = __cls_set_class(&r->class, 0)) != 0)
195 q->ops->cl_ops->unbind_tcf(q, cl);
196}
197
198static inline void
199tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
200{
201 struct Qdisc *q = tp->chain->block->q;
202
203 if (!q)
204 return;
205 __tcf_unbind_filter(q, r);
206}
207
208struct tcf_exts {
209#ifdef CONFIG_NET_CLS_ACT
210 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
211 int nr_actions;
212 struct tc_action **actions;
213 struct net *net;
214#endif
215 /* Map to export classifier specific extension TLV types to the
216 * generic extensions API. Unsupported extensions must be set to 0.
217 */
218 int action;
219 int police;
220};
221
222static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
223 int action, int police)
224{
225#ifdef CONFIG_NET_CLS_ACT
226 exts->type = 0;
227 exts->nr_actions = 0;
228 exts->net = net;
229 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
230 GFP_KERNEL);
231 if (!exts->actions)
232 return -ENOMEM;
233#endif
234 exts->action = action;
235 exts->police = police;
236 return 0;
237}
238
239/* Return false if the netns is being destroyed in cleanup_net(). Callers
240 * need to do cleanup synchronously in this case, otherwise may race with
241 * tc_action_net_exit(). Return true for other cases.
242 */
243static inline bool tcf_exts_get_net(struct tcf_exts *exts)
244{
245#ifdef CONFIG_NET_CLS_ACT
246 exts->net = maybe_get_net(exts->net);
247 return exts->net != NULL;
248#else
249 return true;
250#endif
251}
252
253static inline void tcf_exts_put_net(struct tcf_exts *exts)
254{
255#ifdef CONFIG_NET_CLS_ACT
256 if (exts->net)
257 put_net(exts->net);
258#endif
259}
260
261#ifdef CONFIG_NET_CLS_ACT
262#define tcf_exts_for_each_action(i, a, exts) \
263 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
264#else
265#define tcf_exts_for_each_action(i, a, exts) \
266 for (; 0; (void)(i), (void)(a), (void)(exts))
267#endif
268
269static inline void
270tcf_exts_stats_update(const struct tcf_exts *exts,
271 u64 bytes, u64 packets, u64 drops, u64 lastuse,
272 u8 used_hw_stats, bool used_hw_stats_valid)
273{
274#ifdef CONFIG_NET_CLS_ACT
275 int i;
276
277 preempt_disable();
278
279 for (i = 0; i < exts->nr_actions; i++) {
280 struct tc_action *a = exts->actions[i];
281
282 tcf_action_stats_update(a, bytes, packets, drops,
283 lastuse, true);
284 a->used_hw_stats = used_hw_stats;
285 a->used_hw_stats_valid = used_hw_stats_valid;
286 }
287
288 preempt_enable();
289#endif
290}
291
292/**
293 * tcf_exts_has_actions - check if at least one action is present
294 * @exts: tc filter extensions handle
295 *
296 * Returns true if at least one action is present.
297 */
298static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
299{
300#ifdef CONFIG_NET_CLS_ACT
301 return exts->nr_actions;
302#else
303 return false;
304#endif
305}
306
307/**
308 * tcf_exts_exec - execute tc filter extensions
309 * @skb: socket buffer
310 * @exts: tc filter extensions handle
311 * @res: desired result
312 *
313 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
314 * a negative number if the filter must be considered unmatched or
315 * a positive action code (TC_ACT_*) which must be returned to the
316 * underlying layer.
317 */
318static inline int
319tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
320 struct tcf_result *res)
321{
322#ifdef CONFIG_NET_CLS_ACT
323 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
324#endif
325 return TC_ACT_OK;
326}
327
328int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
329 struct nlattr **tb, struct nlattr *rate_tlv,
330 struct tcf_exts *exts, bool ovr, bool rtnl_held,
331 struct netlink_ext_ack *extack);
332void tcf_exts_destroy(struct tcf_exts *exts);
333void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
334int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
335int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
336int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
337
338/**
339 * struct tcf_pkt_info - packet information
340 *
341 * @ptr: start of the pkt data
342 * @nexthdr: offset of the next header
343 */
344struct tcf_pkt_info {
345 unsigned char * ptr;
346 int nexthdr;
347};
348
349#ifdef CONFIG_NET_EMATCH
350
351struct tcf_ematch_ops;
352
353/**
354 * struct tcf_ematch - extended match (ematch)
355 *
356 * @matchid: identifier to allow userspace to reidentify a match
357 * @flags: flags specifying attributes and the relation to other matches
358 * @ops: the operations lookup table of the corresponding ematch module
359 * @datalen: length of the ematch specific configuration data
360 * @data: ematch specific data
361 * @net: the network namespace
362 */
363struct tcf_ematch {
364 struct tcf_ematch_ops * ops;
365 unsigned long data;
366 unsigned int datalen;
367 u16 matchid;
368 u16 flags;
369 struct net *net;
370};
371
372static inline int tcf_em_is_container(struct tcf_ematch *em)
373{
374 return !em->ops;
375}
376
377static inline int tcf_em_is_simple(struct tcf_ematch *em)
378{
379 return em->flags & TCF_EM_SIMPLE;
380}
381
382static inline int tcf_em_is_inverted(struct tcf_ematch *em)
383{
384 return em->flags & TCF_EM_INVERT;
385}
386
387static inline int tcf_em_last_match(struct tcf_ematch *em)
388{
389 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
390}
391
392static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
393{
394 if (tcf_em_last_match(em))
395 return 1;
396
397 if (result == 0 && em->flags & TCF_EM_REL_AND)
398 return 1;
399
400 if (result != 0 && em->flags & TCF_EM_REL_OR)
401 return 1;
402
403 return 0;
404}
405
406/**
407 * struct tcf_ematch_tree - ematch tree handle
408 *
409 * @hdr: ematch tree header supplied by userspace
410 * @matches: array of ematches
411 */
412struct tcf_ematch_tree {
413 struct tcf_ematch_tree_hdr hdr;
414 struct tcf_ematch * matches;
415
416};
417
418/**
419 * struct tcf_ematch_ops - ematch module operations
420 *
421 * @kind: identifier (kind) of this ematch module
422 * @datalen: length of expected configuration data (optional)
423 * @change: called during validation (optional)
424 * @match: called during ematch tree evaluation, must return 1/0
425 * @destroy: called during destroyage (optional)
426 * @dump: called during dumping process (optional)
427 * @owner: owner, must be set to THIS_MODULE
428 * @link: link to previous/next ematch module (internal use)
429 */
430struct tcf_ematch_ops {
431 int kind;
432 int datalen;
433 int (*change)(struct net *net, void *,
434 int, struct tcf_ematch *);
435 int (*match)(struct sk_buff *, struct tcf_ematch *,
436 struct tcf_pkt_info *);
437 void (*destroy)(struct tcf_ematch *);
438 int (*dump)(struct sk_buff *, struct tcf_ematch *);
439 struct module *owner;
440 struct list_head link;
441};
442
443int tcf_em_register(struct tcf_ematch_ops *);
444void tcf_em_unregister(struct tcf_ematch_ops *);
445int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
446 struct tcf_ematch_tree *);
447void tcf_em_tree_destroy(struct tcf_ematch_tree *);
448int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
449int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
450 struct tcf_pkt_info *);
451
452/**
453 * tcf_em_tree_match - evaulate an ematch tree
454 *
455 * @skb: socket buffer of the packet in question
456 * @tree: ematch tree to be used for evaluation
457 * @info: packet information examined by classifier
458 *
459 * This function matches @skb against the ematch tree in @tree by going
460 * through all ematches respecting their logic relations returning
461 * as soon as the result is obvious.
462 *
463 * Returns 1 if the ematch tree as-one matches, no ematches are configured
464 * or ematch is not enabled in the kernel, otherwise 0 is returned.
465 */
466static inline int tcf_em_tree_match(struct sk_buff *skb,
467 struct tcf_ematch_tree *tree,
468 struct tcf_pkt_info *info)
469{
470 if (tree->hdr.nmatches)
471 return __tcf_em_tree_match(skb, tree, info);
472 else
473 return 1;
474}
475
476#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
477
478#else /* CONFIG_NET_EMATCH */
479
480struct tcf_ematch_tree {
481};
482
483#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
484#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
485#define tcf_em_tree_dump(skb, t, tlv) (0)
486#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
487
488#endif /* CONFIG_NET_EMATCH */
489
490static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
491{
492 switch (layer) {
493 case TCF_LAYER_LINK:
494 return skb_mac_header(skb);
495 case TCF_LAYER_NETWORK:
496 return skb_network_header(skb);
497 case TCF_LAYER_TRANSPORT:
498 return skb_transport_header(skb);
499 }
500
501 return NULL;
502}
503
504static inline int tcf_valid_offset(const struct sk_buff *skb,
505 const unsigned char *ptr, const int len)
506{
507 return likely((ptr + len) <= skb_tail_pointer(skb) &&
508 ptr >= skb->head &&
509 (ptr <= (ptr + len)));
510}
511
512static inline int
513tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
514 struct netlink_ext_ack *extack)
515{
516 char indev[IFNAMSIZ];
517 struct net_device *dev;
518
519 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
520 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
521 "Interface name too long");
522 return -EINVAL;
523 }
524 dev = __dev_get_by_name(net, indev);
525 if (!dev) {
526 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
527 "Network device not found");
528 return -ENODEV;
529 }
530 return dev->ifindex;
531}
532
533static inline bool
534tcf_match_indev(struct sk_buff *skb, int ifindex)
535{
536 if (!ifindex)
537 return true;
538 if (!skb->skb_iif)
539 return false;
540 return ifindex == skb->skb_iif;
541}
542
543int tc_setup_flow_action(struct flow_action *flow_action,
544 const struct tcf_exts *exts);
545void tc_cleanup_flow_action(struct flow_action *flow_action);
546
547int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
548 void *type_data, bool err_stop, bool rtnl_held);
549int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
550 enum tc_setup_type type, void *type_data, bool err_stop,
551 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
552int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
553 enum tc_setup_type type, void *type_data, bool err_stop,
554 u32 *old_flags, unsigned int *old_in_hw_count,
555 u32 *new_flags, unsigned int *new_in_hw_count,
556 bool rtnl_held);
557int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
558 enum tc_setup_type type, void *type_data, bool err_stop,
559 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
560int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
561 bool add, flow_setup_cb_t *cb,
562 enum tc_setup_type type, void *type_data,
563 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
564unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
565
566#ifdef CONFIG_NET_CLS_ACT
567int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
568 enum flow_block_binder_type binder_type,
569 struct nlattr *block_index_attr,
570 struct netlink_ext_ack *extack);
571void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
572int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
573 struct netlink_ext_ack *extack);
574struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
575 struct sk_buff **to_free, int *ret);
576int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
577#else
578static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
579 enum flow_block_binder_type binder_type,
580 struct nlattr *block_index_attr,
581 struct netlink_ext_ack *extack)
582{
583 return 0;
584}
585
586static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
587{
588}
589
590static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
591 struct netlink_ext_ack *extack)
592{
593 return 0;
594}
595
596static inline struct sk_buff *
597tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
598 struct sk_buff **to_free, int *ret)
599{
600 return skb;
601}
602
603static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
604{
605 return 0;
606}
607#endif
608
609struct tc_cls_u32_knode {
610 struct tcf_exts *exts;
611 struct tcf_result *res;
612 struct tc_u32_sel *sel;
613 u32 handle;
614 u32 val;
615 u32 mask;
616 u32 link_handle;
617 u8 fshift;
618};
619
620struct tc_cls_u32_hnode {
621 u32 handle;
622 u32 prio;
623 unsigned int divisor;
624};
625
626enum tc_clsu32_command {
627 TC_CLSU32_NEW_KNODE,
628 TC_CLSU32_REPLACE_KNODE,
629 TC_CLSU32_DELETE_KNODE,
630 TC_CLSU32_NEW_HNODE,
631 TC_CLSU32_REPLACE_HNODE,
632 TC_CLSU32_DELETE_HNODE,
633};
634
635struct tc_cls_u32_offload {
636 struct flow_cls_common_offload common;
637 /* knode values */
638 enum tc_clsu32_command command;
639 union {
640 struct tc_cls_u32_knode knode;
641 struct tc_cls_u32_hnode hnode;
642 };
643};
644
645static inline bool tc_can_offload(const struct net_device *dev)
646{
647 return dev->features & NETIF_F_HW_TC;
648}
649
650static inline bool tc_can_offload_extack(const struct net_device *dev,
651 struct netlink_ext_ack *extack)
652{
653 bool can = tc_can_offload(dev);
654
655 if (!can)
656 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
657
658 return can;
659}
660
661static inline bool
662tc_cls_can_offload_and_chain0(const struct net_device *dev,
663 struct flow_cls_common_offload *common)
664{
665 if (!tc_can_offload_extack(dev, common->extack))
666 return false;
667 if (common->chain_index) {
668 NL_SET_ERR_MSG(common->extack,
669 "Driver supports only offload of chain 0");
670 return false;
671 }
672 return true;
673}
674
675static inline bool tc_skip_hw(u32 flags)
676{
677 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
678}
679
680static inline bool tc_skip_sw(u32 flags)
681{
682 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
683}
684
685/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
686static inline bool tc_flags_valid(u32 flags)
687{
688 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
689 TCA_CLS_FLAGS_VERBOSE))
690 return false;
691
692 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
693 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
694 return false;
695
696 return true;
697}
698
699static inline bool tc_in_hw(u32 flags)
700{
701 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
702}
703
704static inline void
705tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
706 const struct tcf_proto *tp, u32 flags,
707 struct netlink_ext_ack *extack)
708{
709 cls_common->chain_index = tp->chain->index;
710 cls_common->protocol = tp->protocol;
711 cls_common->prio = tp->prio >> 16;
712 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
713 cls_common->extack = extack;
714}
715
716#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
717static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
718{
719 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
720
721 if (tc_skb_ext)
722 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
723 return tc_skb_ext;
724}
725#endif
726
727enum tc_matchall_command {
728 TC_CLSMATCHALL_REPLACE,
729 TC_CLSMATCHALL_DESTROY,
730 TC_CLSMATCHALL_STATS,
731};
732
733struct tc_cls_matchall_offload {
734 struct flow_cls_common_offload common;
735 enum tc_matchall_command command;
736 struct flow_rule *rule;
737 struct flow_stats stats;
738 unsigned long cookie;
739};
740
741enum tc_clsbpf_command {
742 TC_CLSBPF_OFFLOAD,
743 TC_CLSBPF_STATS,
744};
745
746struct tc_cls_bpf_offload {
747 struct flow_cls_common_offload common;
748 enum tc_clsbpf_command command;
749 struct tcf_exts *exts;
750 struct bpf_prog *prog;
751 struct bpf_prog *oldprog;
752 const char *name;
753 bool exts_integrated;
754};
755
756struct tc_mqprio_qopt_offload {
757 /* struct tc_mqprio_qopt must always be the first element */
758 struct tc_mqprio_qopt qopt;
759 u16 mode;
760 u16 shaper;
761 u32 flags;
762 u64 min_rate[TC_QOPT_MAX_QUEUE];
763 u64 max_rate[TC_QOPT_MAX_QUEUE];
764};
765
766/* This structure holds cookie structure that is passed from user
767 * to the kernel for actions and classifiers
768 */
769struct tc_cookie {
770 u8 *data;
771 u32 len;
772 struct rcu_head rcu;
773};
774
775struct tc_qopt_offload_stats {
776 struct gnet_stats_basic_packed *bstats;
777 struct gnet_stats_queue *qstats;
778};
779
780enum tc_mq_command {
781 TC_MQ_CREATE,
782 TC_MQ_DESTROY,
783 TC_MQ_STATS,
784 TC_MQ_GRAFT,
785};
786
787struct tc_mq_opt_offload_graft_params {
788 unsigned long queue;
789 u32 child_handle;
790};
791
792struct tc_mq_qopt_offload {
793 enum tc_mq_command command;
794 u32 handle;
795 union {
796 struct tc_qopt_offload_stats stats;
797 struct tc_mq_opt_offload_graft_params graft_params;
798 };
799};
800
801enum tc_htb_command {
802 /* Root */
803 TC_HTB_CREATE, /* Initialize HTB offload. */
804 TC_HTB_DESTROY, /* Destroy HTB offload. */
805
806 /* Classes */
807 /* Allocate qid and create leaf. */
808 TC_HTB_LEAF_ALLOC_QUEUE,
809 /* Convert leaf to inner, preserve and return qid, create new leaf. */
810 TC_HTB_LEAF_TO_INNER,
811 /* Delete leaf, while siblings remain. */
812 TC_HTB_LEAF_DEL,
813 /* Delete leaf, convert parent to leaf, preserving qid. */
814 TC_HTB_LEAF_DEL_LAST,
815 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
816 TC_HTB_LEAF_DEL_LAST_FORCE,
817 /* Modify parameters of a node. */
818 TC_HTB_NODE_MODIFY,
819
820 /* Class qdisc */
821 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
822};
823
824struct tc_htb_qopt_offload {
825 struct netlink_ext_ack *extack;
826 enum tc_htb_command command;
827 u32 parent_classid;
828 u16 classid;
829 u16 qid;
830 u64 rate;
831 u64 ceil;
832};
833
834#define TC_HTB_CLASSID_ROOT U32_MAX
835
836enum tc_red_command {
837 TC_RED_REPLACE,
838 TC_RED_DESTROY,
839 TC_RED_STATS,
840 TC_RED_XSTATS,
841 TC_RED_GRAFT,
842};
843
844struct tc_red_qopt_offload_params {
845 u32 min;
846 u32 max;
847 u32 probability;
848 u32 limit;
849 bool is_ecn;
850 bool is_harddrop;
851 bool is_nodrop;
852 struct gnet_stats_queue *qstats;
853};
854
855struct tc_red_qopt_offload {
856 enum tc_red_command command;
857 u32 handle;
858 u32 parent;
859 union {
860 struct tc_red_qopt_offload_params set;
861 struct tc_qopt_offload_stats stats;
862 struct red_stats *xstats;
863 u32 child_handle;
864 };
865};
866
867enum tc_gred_command {
868 TC_GRED_REPLACE,
869 TC_GRED_DESTROY,
870 TC_GRED_STATS,
871};
872
873struct tc_gred_vq_qopt_offload_params {
874 bool present;
875 u32 limit;
876 u32 prio;
877 u32 min;
878 u32 max;
879 bool is_ecn;
880 bool is_harddrop;
881 u32 probability;
882 /* Only need backlog, see struct tc_prio_qopt_offload_params */
883 u32 *backlog;
884};
885
886struct tc_gred_qopt_offload_params {
887 bool grio_on;
888 bool wred_on;
889 unsigned int dp_cnt;
890 unsigned int dp_def;
891 struct gnet_stats_queue *qstats;
892 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
893};
894
895struct tc_gred_qopt_offload_stats {
896 struct gnet_stats_basic_packed bstats[MAX_DPs];
897 struct gnet_stats_queue qstats[MAX_DPs];
898 struct red_stats *xstats[MAX_DPs];
899};
900
901struct tc_gred_qopt_offload {
902 enum tc_gred_command command;
903 u32 handle;
904 u32 parent;
905 union {
906 struct tc_gred_qopt_offload_params set;
907 struct tc_gred_qopt_offload_stats stats;
908 };
909};
910
911enum tc_prio_command {
912 TC_PRIO_REPLACE,
913 TC_PRIO_DESTROY,
914 TC_PRIO_STATS,
915 TC_PRIO_GRAFT,
916};
917
918struct tc_prio_qopt_offload_params {
919 int bands;
920 u8 priomap[TC_PRIO_MAX + 1];
921 /* At the point of un-offloading the Qdisc, the reported backlog and
922 * qlen need to be reduced by the portion that is in HW.
923 */
924 struct gnet_stats_queue *qstats;
925};
926
927struct tc_prio_qopt_offload_graft_params {
928 u8 band;
929 u32 child_handle;
930};
931
932struct tc_prio_qopt_offload {
933 enum tc_prio_command command;
934 u32 handle;
935 u32 parent;
936 union {
937 struct tc_prio_qopt_offload_params replace_params;
938 struct tc_qopt_offload_stats stats;
939 struct tc_prio_qopt_offload_graft_params graft_params;
940 };
941};
942
943enum tc_root_command {
944 TC_ROOT_GRAFT,
945};
946
947struct tc_root_qopt_offload {
948 enum tc_root_command command;
949 u32 handle;
950 bool ingress;
951};
952
953enum tc_ets_command {
954 TC_ETS_REPLACE,
955 TC_ETS_DESTROY,
956 TC_ETS_STATS,
957 TC_ETS_GRAFT,
958};
959
960struct tc_ets_qopt_offload_replace_params {
961 unsigned int bands;
962 u8 priomap[TC_PRIO_MAX + 1];
963 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
964 unsigned int weights[TCQ_ETS_MAX_BANDS];
965 struct gnet_stats_queue *qstats;
966};
967
968struct tc_ets_qopt_offload_graft_params {
969 u8 band;
970 u32 child_handle;
971};
972
973struct tc_ets_qopt_offload {
974 enum tc_ets_command command;
975 u32 handle;
976 u32 parent;
977 union {
978 struct tc_ets_qopt_offload_replace_params replace_params;
979 struct tc_qopt_offload_stats stats;
980 struct tc_ets_qopt_offload_graft_params graft_params;
981 };
982};
983
984enum tc_tbf_command {
985 TC_TBF_REPLACE,
986 TC_TBF_DESTROY,
987 TC_TBF_STATS,
988};
989
990struct tc_tbf_qopt_offload_replace_params {
991 struct psched_ratecfg rate;
992 u32 max_size;
993 struct gnet_stats_queue *qstats;
994};
995
996struct tc_tbf_qopt_offload {
997 enum tc_tbf_command command;
998 u32 handle;
999 u32 parent;
1000 union {
1001 struct tc_tbf_qopt_offload_replace_params replace_params;
1002 struct tc_qopt_offload_stats stats;
1003 };
1004};
1005
1006enum tc_fifo_command {
1007 TC_FIFO_REPLACE,
1008 TC_FIFO_DESTROY,
1009 TC_FIFO_STATS,
1010};
1011
1012struct tc_fifo_qopt_offload {
1013 enum tc_fifo_command command;
1014 u32 handle;
1015 u32 parent;
1016 union {
1017 struct tc_qopt_offload_stats stats;
1018 };
1019};
1020
1021#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);
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