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(clp: &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(clp: &r->class, cl: 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, r: res, base);
211 else
212 __tcf_unbind_filter(q, r: 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, handle: 0, used_action_miss: 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(net: exts->net);
250 if (exts->net)
251 netns_tracker_alloc(net: exts->net, tracker: &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(net: exts->net, tracker: &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(act: a)) {
294 if (!tcf_action_update_hw_stats(action: a))
295 continue;
296 }
297
298 preempt_disable();
299 tcf_action_stats_update(a, bytes: stats->bytes, packets: stats->pkts, drops: stats->drops,
300 lastuse: stats->lastused, hw: 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, actions: exts->actions, nr_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, actions: exts->actions + act_index,
351 nr_actions: 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(dst: indev, nla: 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, name: 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, extack: 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, id: 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
1065

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