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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_block_cb;
36bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
37
38#ifdef CONFIG_NET_CLS
39struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
40 u32 chain_index);
41void tcf_chain_put_by_act(struct tcf_chain *chain);
42struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
43 struct tcf_chain *chain);
44struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
45 struct tcf_proto *tp, bool rtnl_held);
46void tcf_block_netif_keep_dst(struct tcf_block *block);
47int tcf_block_get(struct tcf_block **p_block,
48 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
49 struct netlink_ext_ack *extack);
50int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
51 struct tcf_block_ext_info *ei,
52 struct netlink_ext_ack *extack);
53void tcf_block_put(struct tcf_block *block);
54void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
55 struct tcf_block_ext_info *ei);
56
57static inline bool tcf_block_shared(struct tcf_block *block)
58{
59 return block->index;
60}
61
62static inline bool tcf_block_non_null_shared(struct tcf_block *block)
63{
64 return block && block->index;
65}
66
67static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
68{
69 WARN_ON(tcf_block_shared(block));
70 return block->q;
71}
72
73int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
74 struct tcf_result *res, bool compat_mode);
75
76#else
77static inline bool tcf_block_shared(struct tcf_block *block)
78{
79 return false;
80}
81
82static inline bool tcf_block_non_null_shared(struct tcf_block *block)
83{
84 return false;
85}
86
87static inline
88int tcf_block_get(struct tcf_block **p_block,
89 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
90 struct netlink_ext_ack *extack)
91{
92 return 0;
93}
94
95static inline
96int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
97 struct tcf_block_ext_info *ei,
98 struct netlink_ext_ack *extack)
99{
100 return 0;
101}
102
103static inline void tcf_block_put(struct tcf_block *block)
104{
105}
106
107static inline
108void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
109 struct tcf_block_ext_info *ei)
110{
111}
112
113static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
114{
115 return NULL;
116}
117
118static inline
119int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
120 void *cb_priv)
121{
122 return 0;
123}
124
125static inline
126void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
127 void *cb_priv)
128{
129}
130
131static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
132 struct tcf_result *res, bool compat_mode)
133{
134 return TC_ACT_UNSPEC;
135}
136#endif
137
138static inline unsigned long
139__cls_set_class(unsigned long *clp, unsigned long cl)
140{
141 return xchg(clp, cl);
142}
143
144static inline unsigned long
145cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
146{
147 unsigned long old_cl;
148
149 sch_tree_lock(q);
150 old_cl = __cls_set_class(clp, cl);
151 sch_tree_unlock(q);
152 return old_cl;
153}
154
155static inline void
156tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
157{
158 struct Qdisc *q = tp->chain->block->q;
159 unsigned long cl;
160
161 /* Check q as it is not set for shared blocks. In that case,
162 * setting class is not supported.
163 */
164 if (!q)
165 return;
166 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
167 cl = cls_set_class(q, &r->class, cl);
168 if (cl)
169 q->ops->cl_ops->unbind_tcf(q, cl);
170}
171
172static inline void
173tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
174{
175 struct Qdisc *q = tp->chain->block->q;
176 unsigned long cl;
177
178 if (!q)
179 return;
180 if ((cl = __cls_set_class(&r->class, 0)) != 0)
181 q->ops->cl_ops->unbind_tcf(q, cl);
182}
183
184struct tcf_exts {
185#ifdef CONFIG_NET_CLS_ACT
186 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
187 int nr_actions;
188 struct tc_action **actions;
189 struct net *net;
190#endif
191 /* Map to export classifier specific extension TLV types to the
192 * generic extensions API. Unsupported extensions must be set to 0.
193 */
194 int action;
195 int police;
196};
197
198static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
199 int action, int police)
200{
201#ifdef CONFIG_NET_CLS_ACT
202 exts->type = 0;
203 exts->nr_actions = 0;
204 exts->net = net;
205 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
206 GFP_KERNEL);
207 if (!exts->actions)
208 return -ENOMEM;
209#endif
210 exts->action = action;
211 exts->police = police;
212 return 0;
213}
214
215/* Return false if the netns is being destroyed in cleanup_net(). Callers
216 * need to do cleanup synchronously in this case, otherwise may race with
217 * tc_action_net_exit(). Return true for other cases.
218 */
219static inline bool tcf_exts_get_net(struct tcf_exts *exts)
220{
221#ifdef CONFIG_NET_CLS_ACT
222 exts->net = maybe_get_net(exts->net);
223 return exts->net != NULL;
224#else
225 return true;
226#endif
227}
228
229static inline void tcf_exts_put_net(struct tcf_exts *exts)
230{
231#ifdef CONFIG_NET_CLS_ACT
232 if (exts->net)
233 put_net(exts->net);
234#endif
235}
236
237#ifdef CONFIG_NET_CLS_ACT
238#define tcf_exts_for_each_action(i, a, exts) \
239 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
240#else
241#define tcf_exts_for_each_action(i, a, exts) \
242 for (; 0; (void)(i), (void)(a), (void)(exts))
243#endif
244
245static inline void
246tcf_exts_stats_update(const struct tcf_exts *exts,
247 u64 bytes, u64 packets, u64 lastuse)
248{
249#ifdef CONFIG_NET_CLS_ACT
250 int i;
251
252 preempt_disable();
253
254 for (i = 0; i < exts->nr_actions; i++) {
255 struct tc_action *a = exts->actions[i];
256
257 tcf_action_stats_update(a, bytes, packets, lastuse, true);
258 }
259
260 preempt_enable();
261#endif
262}
263
264/**
265 * tcf_exts_has_actions - check if at least one action is present
266 * @exts: tc filter extensions handle
267 *
268 * Returns true if at least one action is present.
269 */
270static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
271{
272#ifdef CONFIG_NET_CLS_ACT
273 return exts->nr_actions;
274#else
275 return false;
276#endif
277}
278
279/**
280 * tcf_exts_exec - execute tc filter extensions
281 * @skb: socket buffer
282 * @exts: tc filter extensions handle
283 * @res: desired result
284 *
285 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
286 * a negative number if the filter must be considered unmatched or
287 * a positive action code (TC_ACT_*) which must be returned to the
288 * underlying layer.
289 */
290static inline int
291tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
292 struct tcf_result *res)
293{
294#ifdef CONFIG_NET_CLS_ACT
295 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
296#endif
297 return TC_ACT_OK;
298}
299
300int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
301 struct nlattr **tb, struct nlattr *rate_tlv,
302 struct tcf_exts *exts, bool ovr, bool rtnl_held,
303 struct netlink_ext_ack *extack);
304void tcf_exts_destroy(struct tcf_exts *exts);
305void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
306int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
307int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
308
309/**
310 * struct tcf_pkt_info - packet information
311 */
312struct tcf_pkt_info {
313 unsigned char * ptr;
314 int nexthdr;
315};
316
317#ifdef CONFIG_NET_EMATCH
318
319struct tcf_ematch_ops;
320
321/**
322 * struct tcf_ematch - extended match (ematch)
323 *
324 * @matchid: identifier to allow userspace to reidentify a match
325 * @flags: flags specifying attributes and the relation to other matches
326 * @ops: the operations lookup table of the corresponding ematch module
327 * @datalen: length of the ematch specific configuration data
328 * @data: ematch specific data
329 */
330struct tcf_ematch {
331 struct tcf_ematch_ops * ops;
332 unsigned long data;
333 unsigned int datalen;
334 u16 matchid;
335 u16 flags;
336 struct net *net;
337};
338
339static inline int tcf_em_is_container(struct tcf_ematch *em)
340{
341 return !em->ops;
342}
343
344static inline int tcf_em_is_simple(struct tcf_ematch *em)
345{
346 return em->flags & TCF_EM_SIMPLE;
347}
348
349static inline int tcf_em_is_inverted(struct tcf_ematch *em)
350{
351 return em->flags & TCF_EM_INVERT;
352}
353
354static inline int tcf_em_last_match(struct tcf_ematch *em)
355{
356 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
357}
358
359static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
360{
361 if (tcf_em_last_match(em))
362 return 1;
363
364 if (result == 0 && em->flags & TCF_EM_REL_AND)
365 return 1;
366
367 if (result != 0 && em->flags & TCF_EM_REL_OR)
368 return 1;
369
370 return 0;
371}
372
373/**
374 * struct tcf_ematch_tree - ematch tree handle
375 *
376 * @hdr: ematch tree header supplied by userspace
377 * @matches: array of ematches
378 */
379struct tcf_ematch_tree {
380 struct tcf_ematch_tree_hdr hdr;
381 struct tcf_ematch * matches;
382
383};
384
385/**
386 * struct tcf_ematch_ops - ematch module operations
387 *
388 * @kind: identifier (kind) of this ematch module
389 * @datalen: length of expected configuration data (optional)
390 * @change: called during validation (optional)
391 * @match: called during ematch tree evaluation, must return 1/0
392 * @destroy: called during destroyage (optional)
393 * @dump: called during dumping process (optional)
394 * @owner: owner, must be set to THIS_MODULE
395 * @link: link to previous/next ematch module (internal use)
396 */
397struct tcf_ematch_ops {
398 int kind;
399 int datalen;
400 int (*change)(struct net *net, void *,
401 int, struct tcf_ematch *);
402 int (*match)(struct sk_buff *, struct tcf_ematch *,
403 struct tcf_pkt_info *);
404 void (*destroy)(struct tcf_ematch *);
405 int (*dump)(struct sk_buff *, struct tcf_ematch *);
406 struct module *owner;
407 struct list_head link;
408};
409
410int tcf_em_register(struct tcf_ematch_ops *);
411void tcf_em_unregister(struct tcf_ematch_ops *);
412int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
413 struct tcf_ematch_tree *);
414void tcf_em_tree_destroy(struct tcf_ematch_tree *);
415int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
416int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
417 struct tcf_pkt_info *);
418
419/**
420 * tcf_em_tree_match - evaulate an ematch tree
421 *
422 * @skb: socket buffer of the packet in question
423 * @tree: ematch tree to be used for evaluation
424 * @info: packet information examined by classifier
425 *
426 * This function matches @skb against the ematch tree in @tree by going
427 * through all ematches respecting their logic relations returning
428 * as soon as the result is obvious.
429 *
430 * Returns 1 if the ematch tree as-one matches, no ematches are configured
431 * or ematch is not enabled in the kernel, otherwise 0 is returned.
432 */
433static inline int tcf_em_tree_match(struct sk_buff *skb,
434 struct tcf_ematch_tree *tree,
435 struct tcf_pkt_info *info)
436{
437 if (tree->hdr.nmatches)
438 return __tcf_em_tree_match(skb, tree, info);
439 else
440 return 1;
441}
442
443#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
444
445#else /* CONFIG_NET_EMATCH */
446
447struct tcf_ematch_tree {
448};
449
450#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
451#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
452#define tcf_em_tree_dump(skb, t, tlv) (0)
453#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
454
455#endif /* CONFIG_NET_EMATCH */
456
457static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
458{
459 switch (layer) {
460 case TCF_LAYER_LINK:
461 return skb_mac_header(skb);
462 case TCF_LAYER_NETWORK:
463 return skb_network_header(skb);
464 case TCF_LAYER_TRANSPORT:
465 return skb_transport_header(skb);
466 }
467
468 return NULL;
469}
470
471static inline int tcf_valid_offset(const struct sk_buff *skb,
472 const unsigned char *ptr, const int len)
473{
474 return likely((ptr + len) <= skb_tail_pointer(skb) &&
475 ptr >= skb->head &&
476 (ptr <= (ptr + len)));
477}
478
479static inline int
480tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
481 struct netlink_ext_ack *extack)
482{
483 char indev[IFNAMSIZ];
484 struct net_device *dev;
485
486 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
487 NL_SET_ERR_MSG(extack, "Interface name too long");
488 return -EINVAL;
489 }
490 dev = __dev_get_by_name(net, indev);
491 if (!dev)
492 return -ENODEV;
493 return dev->ifindex;
494}
495
496static inline bool
497tcf_match_indev(struct sk_buff *skb, int ifindex)
498{
499 if (!ifindex)
500 return true;
501 if (!skb->skb_iif)
502 return false;
503 return ifindex == skb->skb_iif;
504}
505
506int tc_setup_flow_action(struct flow_action *flow_action,
507 const struct tcf_exts *exts, bool rtnl_held);
508void tc_cleanup_flow_action(struct flow_action *flow_action);
509
510int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
511 void *type_data, bool err_stop, bool rtnl_held);
512int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
513 enum tc_setup_type type, void *type_data, bool err_stop,
514 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
515int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
516 enum tc_setup_type type, void *type_data, bool err_stop,
517 u32 *old_flags, unsigned int *old_in_hw_count,
518 u32 *new_flags, unsigned int *new_in_hw_count,
519 bool rtnl_held);
520int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
521 enum tc_setup_type type, void *type_data, bool err_stop,
522 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
523int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
524 bool add, flow_setup_cb_t *cb,
525 enum tc_setup_type type, void *type_data,
526 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
527unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
528
529struct tc_cls_u32_knode {
530 struct tcf_exts *exts;
531 struct tcf_result *res;
532 struct tc_u32_sel *sel;
533 u32 handle;
534 u32 val;
535 u32 mask;
536 u32 link_handle;
537 u8 fshift;
538};
539
540struct tc_cls_u32_hnode {
541 u32 handle;
542 u32 prio;
543 unsigned int divisor;
544};
545
546enum tc_clsu32_command {
547 TC_CLSU32_NEW_KNODE,
548 TC_CLSU32_REPLACE_KNODE,
549 TC_CLSU32_DELETE_KNODE,
550 TC_CLSU32_NEW_HNODE,
551 TC_CLSU32_REPLACE_HNODE,
552 TC_CLSU32_DELETE_HNODE,
553};
554
555struct tc_cls_u32_offload {
556 struct flow_cls_common_offload common;
557 /* knode values */
558 enum tc_clsu32_command command;
559 union {
560 struct tc_cls_u32_knode knode;
561 struct tc_cls_u32_hnode hnode;
562 };
563};
564
565static inline bool tc_can_offload(const struct net_device *dev)
566{
567 return dev->features & NETIF_F_HW_TC;
568}
569
570static inline bool tc_can_offload_extack(const struct net_device *dev,
571 struct netlink_ext_ack *extack)
572{
573 bool can = tc_can_offload(dev);
574
575 if (!can)
576 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
577
578 return can;
579}
580
581static inline bool
582tc_cls_can_offload_and_chain0(const struct net_device *dev,
583 struct flow_cls_common_offload *common)
584{
585 if (!tc_can_offload_extack(dev, common->extack))
586 return false;
587 if (common->chain_index) {
588 NL_SET_ERR_MSG(common->extack,
589 "Driver supports only offload of chain 0");
590 return false;
591 }
592 return true;
593}
594
595static inline bool tc_skip_hw(u32 flags)
596{
597 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
598}
599
600static inline bool tc_skip_sw(u32 flags)
601{
602 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
603}
604
605/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
606static inline bool tc_flags_valid(u32 flags)
607{
608 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
609 TCA_CLS_FLAGS_VERBOSE))
610 return false;
611
612 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
613 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
614 return false;
615
616 return true;
617}
618
619static inline bool tc_in_hw(u32 flags)
620{
621 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
622}
623
624static inline void
625tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
626 const struct tcf_proto *tp, u32 flags,
627 struct netlink_ext_ack *extack)
628{
629 cls_common->chain_index = tp->chain->index;
630 cls_common->protocol = tp->protocol;
631 cls_common->prio = tp->prio >> 16;
632 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
633 cls_common->extack = extack;
634}
635
636enum tc_matchall_command {
637 TC_CLSMATCHALL_REPLACE,
638 TC_CLSMATCHALL_DESTROY,
639 TC_CLSMATCHALL_STATS,
640};
641
642struct tc_cls_matchall_offload {
643 struct flow_cls_common_offload common;
644 enum tc_matchall_command command;
645 struct flow_rule *rule;
646 struct flow_stats stats;
647 unsigned long cookie;
648};
649
650enum tc_clsbpf_command {
651 TC_CLSBPF_OFFLOAD,
652 TC_CLSBPF_STATS,
653};
654
655struct tc_cls_bpf_offload {
656 struct flow_cls_common_offload common;
657 enum tc_clsbpf_command command;
658 struct tcf_exts *exts;
659 struct bpf_prog *prog;
660 struct bpf_prog *oldprog;
661 const char *name;
662 bool exts_integrated;
663};
664
665struct tc_mqprio_qopt_offload {
666 /* struct tc_mqprio_qopt must always be the first element */
667 struct tc_mqprio_qopt qopt;
668 u16 mode;
669 u16 shaper;
670 u32 flags;
671 u64 min_rate[TC_QOPT_MAX_QUEUE];
672 u64 max_rate[TC_QOPT_MAX_QUEUE];
673};
674
675/* This structure holds cookie structure that is passed from user
676 * to the kernel for actions and classifiers
677 */
678struct tc_cookie {
679 u8 *data;
680 u32 len;
681 struct rcu_head rcu;
682};
683
684struct tc_qopt_offload_stats {
685 struct gnet_stats_basic_packed *bstats;
686 struct gnet_stats_queue *qstats;
687};
688
689enum tc_mq_command {
690 TC_MQ_CREATE,
691 TC_MQ_DESTROY,
692 TC_MQ_STATS,
693 TC_MQ_GRAFT,
694};
695
696struct tc_mq_opt_offload_graft_params {
697 unsigned long queue;
698 u32 child_handle;
699};
700
701struct tc_mq_qopt_offload {
702 enum tc_mq_command command;
703 u32 handle;
704 union {
705 struct tc_qopt_offload_stats stats;
706 struct tc_mq_opt_offload_graft_params graft_params;
707 };
708};
709
710enum tc_red_command {
711 TC_RED_REPLACE,
712 TC_RED_DESTROY,
713 TC_RED_STATS,
714 TC_RED_XSTATS,
715 TC_RED_GRAFT,
716};
717
718struct tc_red_qopt_offload_params {
719 u32 min;
720 u32 max;
721 u32 probability;
722 u32 limit;
723 bool is_ecn;
724 bool is_harddrop;
725 struct gnet_stats_queue *qstats;
726};
727
728struct tc_red_qopt_offload {
729 enum tc_red_command command;
730 u32 handle;
731 u32 parent;
732 union {
733 struct tc_red_qopt_offload_params set;
734 struct tc_qopt_offload_stats stats;
735 struct red_stats *xstats;
736 u32 child_handle;
737 };
738};
739
740enum tc_gred_command {
741 TC_GRED_REPLACE,
742 TC_GRED_DESTROY,
743 TC_GRED_STATS,
744};
745
746struct tc_gred_vq_qopt_offload_params {
747 bool present;
748 u32 limit;
749 u32 prio;
750 u32 min;
751 u32 max;
752 bool is_ecn;
753 bool is_harddrop;
754 u32 probability;
755 /* Only need backlog, see struct tc_prio_qopt_offload_params */
756 u32 *backlog;
757};
758
759struct tc_gred_qopt_offload_params {
760 bool grio_on;
761 bool wred_on;
762 unsigned int dp_cnt;
763 unsigned int dp_def;
764 struct gnet_stats_queue *qstats;
765 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
766};
767
768struct tc_gred_qopt_offload_stats {
769 struct gnet_stats_basic_packed bstats[MAX_DPs];
770 struct gnet_stats_queue qstats[MAX_DPs];
771 struct red_stats *xstats[MAX_DPs];
772};
773
774struct tc_gred_qopt_offload {
775 enum tc_gred_command command;
776 u32 handle;
777 u32 parent;
778 union {
779 struct tc_gred_qopt_offload_params set;
780 struct tc_gred_qopt_offload_stats stats;
781 };
782};
783
784enum tc_prio_command {
785 TC_PRIO_REPLACE,
786 TC_PRIO_DESTROY,
787 TC_PRIO_STATS,
788 TC_PRIO_GRAFT,
789};
790
791struct tc_prio_qopt_offload_params {
792 int bands;
793 u8 priomap[TC_PRIO_MAX + 1];
794 /* In case that a prio qdisc is offloaded and now is changed to a
795 * non-offloadedable config, it needs to update the backlog & qlen
796 * values to negate the HW backlog & qlen values (and only them).
797 */
798 struct gnet_stats_queue *qstats;
799};
800
801struct tc_prio_qopt_offload_graft_params {
802 u8 band;
803 u32 child_handle;
804};
805
806struct tc_prio_qopt_offload {
807 enum tc_prio_command command;
808 u32 handle;
809 u32 parent;
810 union {
811 struct tc_prio_qopt_offload_params replace_params;
812 struct tc_qopt_offload_stats stats;
813 struct tc_prio_qopt_offload_graft_params graft_params;
814 };
815};
816
817enum tc_root_command {
818 TC_ROOT_GRAFT,
819};
820
821struct tc_root_qopt_offload {
822 enum tc_root_command command;
823 u32 handle;
824 bool ingress;
825};
826
827#endif
1#ifndef __NET_PKT_CLS_H
2#define __NET_PKT_CLS_H
3
4#include <linux/pkt_cls.h>
5#include <net/sch_generic.h>
6#include <net/act_api.h>
7
8/* Basic packet classifier frontend definitions. */
9
10struct tcf_walker {
11 int stop;
12 int skip;
13 int count;
14 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
15};
16
17int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
19
20static inline unsigned long
21__cls_set_class(unsigned long *clp, unsigned long cl)
22{
23 unsigned long old_cl;
24
25 old_cl = *clp;
26 *clp = cl;
27 return old_cl;
28}
29
30static inline unsigned long
31cls_set_class(struct tcf_proto *tp, unsigned long *clp,
32 unsigned long cl)
33{
34 unsigned long old_cl;
35
36 tcf_tree_lock(tp);
37 old_cl = __cls_set_class(clp, cl);
38 tcf_tree_unlock(tp);
39
40 return old_cl;
41}
42
43static inline void
44tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
45{
46 unsigned long cl;
47
48 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
49 cl = cls_set_class(tp, &r->class, cl);
50 if (cl)
51 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
52}
53
54static inline void
55tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
56{
57 unsigned long cl;
58
59 if ((cl = __cls_set_class(&r->class, 0)) != 0)
60 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
61}
62
63struct tcf_exts {
64#ifdef CONFIG_NET_CLS_ACT
65 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
66 struct list_head actions;
67#endif
68 /* Map to export classifier specific extension TLV types to the
69 * generic extensions API. Unsupported extensions must be set to 0.
70 */
71 int action;
72 int police;
73};
74
75static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
76{
77#ifdef CONFIG_NET_CLS_ACT
78 exts->type = 0;
79 INIT_LIST_HEAD(&exts->actions);
80#endif
81 exts->action = action;
82 exts->police = police;
83}
84
85/**
86 * tcf_exts_is_predicative - check if a predicative extension is present
87 * @exts: tc filter extensions handle
88 *
89 * Returns 1 if a predicative extension is present, i.e. an extension which
90 * might cause further actions and thus overrule the regular tcf_result.
91 */
92static inline int
93tcf_exts_is_predicative(struct tcf_exts *exts)
94{
95#ifdef CONFIG_NET_CLS_ACT
96 return !list_empty(&exts->actions);
97#else
98 return 0;
99#endif
100}
101
102/**
103 * tcf_exts_is_available - check if at least one extension is present
104 * @exts: tc filter extensions handle
105 *
106 * Returns 1 if at least one extension is present.
107 */
108static inline int
109tcf_exts_is_available(struct tcf_exts *exts)
110{
111 /* All non-predicative extensions must be added here. */
112 return tcf_exts_is_predicative(exts);
113}
114
115/**
116 * tcf_exts_exec - execute tc filter extensions
117 * @skb: socket buffer
118 * @exts: tc filter extensions handle
119 * @res: desired result
120 *
121 * Executes all configured extensions. Returns 0 on a normal execution,
122 * a negative number if the filter must be considered unmatched or
123 * a positive action code (TC_ACT_*) which must be returned to the
124 * underlying layer.
125 */
126static inline int
127tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
128 struct tcf_result *res)
129{
130#ifdef CONFIG_NET_CLS_ACT
131 if (!list_empty(&exts->actions))
132 return tcf_action_exec(skb, &exts->actions, res);
133#endif
134 return 0;
135}
136
137int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
138 struct nlattr **tb, struct nlattr *rate_tlv,
139 struct tcf_exts *exts);
140void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
141void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
142 struct tcf_exts *src);
143int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
144int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
145
146/**
147 * struct tcf_pkt_info - packet information
148 */
149struct tcf_pkt_info {
150 unsigned char * ptr;
151 int nexthdr;
152};
153
154#ifdef CONFIG_NET_EMATCH
155
156struct tcf_ematch_ops;
157
158/**
159 * struct tcf_ematch - extended match (ematch)
160 *
161 * @matchid: identifier to allow userspace to reidentify a match
162 * @flags: flags specifying attributes and the relation to other matches
163 * @ops: the operations lookup table of the corresponding ematch module
164 * @datalen: length of the ematch specific configuration data
165 * @data: ematch specific data
166 */
167struct tcf_ematch {
168 struct tcf_ematch_ops * ops;
169 unsigned long data;
170 unsigned int datalen;
171 u16 matchid;
172 u16 flags;
173};
174
175static inline int tcf_em_is_container(struct tcf_ematch *em)
176{
177 return !em->ops;
178}
179
180static inline int tcf_em_is_simple(struct tcf_ematch *em)
181{
182 return em->flags & TCF_EM_SIMPLE;
183}
184
185static inline int tcf_em_is_inverted(struct tcf_ematch *em)
186{
187 return em->flags & TCF_EM_INVERT;
188}
189
190static inline int tcf_em_last_match(struct tcf_ematch *em)
191{
192 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
193}
194
195static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
196{
197 if (tcf_em_last_match(em))
198 return 1;
199
200 if (result == 0 && em->flags & TCF_EM_REL_AND)
201 return 1;
202
203 if (result != 0 && em->flags & TCF_EM_REL_OR)
204 return 1;
205
206 return 0;
207}
208
209/**
210 * struct tcf_ematch_tree - ematch tree handle
211 *
212 * @hdr: ematch tree header supplied by userspace
213 * @matches: array of ematches
214 */
215struct tcf_ematch_tree {
216 struct tcf_ematch_tree_hdr hdr;
217 struct tcf_ematch * matches;
218
219};
220
221/**
222 * struct tcf_ematch_ops - ematch module operations
223 *
224 * @kind: identifier (kind) of this ematch module
225 * @datalen: length of expected configuration data (optional)
226 * @change: called during validation (optional)
227 * @match: called during ematch tree evaluation, must return 1/0
228 * @destroy: called during destroyage (optional)
229 * @dump: called during dumping process (optional)
230 * @owner: owner, must be set to THIS_MODULE
231 * @link: link to previous/next ematch module (internal use)
232 */
233struct tcf_ematch_ops {
234 int kind;
235 int datalen;
236 int (*change)(struct tcf_proto *, void *,
237 int, struct tcf_ematch *);
238 int (*match)(struct sk_buff *, struct tcf_ematch *,
239 struct tcf_pkt_info *);
240 void (*destroy)(struct tcf_proto *,
241 struct tcf_ematch *);
242 int (*dump)(struct sk_buff *, struct tcf_ematch *);
243 struct module *owner;
244 struct list_head link;
245};
246
247int tcf_em_register(struct tcf_ematch_ops *);
248void tcf_em_unregister(struct tcf_ematch_ops *);
249int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
250 struct tcf_ematch_tree *);
251void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
252int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
253int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
254 struct tcf_pkt_info *);
255
256/**
257 * tcf_em_tree_change - replace ematch tree of a running classifier
258 *
259 * @tp: classifier kind handle
260 * @dst: destination ematch tree variable
261 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
262 *
263 * This functions replaces the ematch tree in @dst with the ematch
264 * tree in @src. The classifier in charge of the ematch tree may be
265 * running.
266 */
267static inline void tcf_em_tree_change(struct tcf_proto *tp,
268 struct tcf_ematch_tree *dst,
269 struct tcf_ematch_tree *src)
270{
271 tcf_tree_lock(tp);
272 memcpy(dst, src, sizeof(*dst));
273 tcf_tree_unlock(tp);
274}
275
276/**
277 * tcf_em_tree_match - evaulate an ematch tree
278 *
279 * @skb: socket buffer of the packet in question
280 * @tree: ematch tree to be used for evaluation
281 * @info: packet information examined by classifier
282 *
283 * This function matches @skb against the ematch tree in @tree by going
284 * through all ematches respecting their logic relations returning
285 * as soon as the result is obvious.
286 *
287 * Returns 1 if the ematch tree as-one matches, no ematches are configured
288 * or ematch is not enabled in the kernel, otherwise 0 is returned.
289 */
290static inline int tcf_em_tree_match(struct sk_buff *skb,
291 struct tcf_ematch_tree *tree,
292 struct tcf_pkt_info *info)
293{
294 if (tree->hdr.nmatches)
295 return __tcf_em_tree_match(skb, tree, info);
296 else
297 return 1;
298}
299
300#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
301
302#else /* CONFIG_NET_EMATCH */
303
304struct tcf_ematch_tree {
305};
306
307#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
308#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
309#define tcf_em_tree_dump(skb, t, tlv) (0)
310#define tcf_em_tree_change(tp, dst, src) do { } while(0)
311#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
312
313#endif /* CONFIG_NET_EMATCH */
314
315static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
316{
317 switch (layer) {
318 case TCF_LAYER_LINK:
319 return skb->data;
320 case TCF_LAYER_NETWORK:
321 return skb_network_header(skb);
322 case TCF_LAYER_TRANSPORT:
323 return skb_transport_header(skb);
324 }
325
326 return NULL;
327}
328
329static inline int tcf_valid_offset(const struct sk_buff *skb,
330 const unsigned char *ptr, const int len)
331{
332 return likely((ptr + len) <= skb_tail_pointer(skb) &&
333 ptr >= skb->head &&
334 (ptr <= (ptr + len)));
335}
336
337#ifdef CONFIG_NET_CLS_IND
338#include <net/net_namespace.h>
339
340static inline int
341tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
342{
343 char indev[IFNAMSIZ];
344 struct net_device *dev;
345
346 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
347 return -EINVAL;
348 dev = __dev_get_by_name(net, indev);
349 if (!dev)
350 return -ENODEV;
351 return dev->ifindex;
352}
353
354static inline bool
355tcf_match_indev(struct sk_buff *skb, int ifindex)
356{
357 if (!ifindex)
358 return true;
359 if (!skb->skb_iif)
360 return false;
361 return ifindex == skb->skb_iif;
362}
363#endif /* CONFIG_NET_CLS_IND */
364
365#endif