Line data Source code
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 :
16 : struct 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 :
25 : int register_tcf_proto_ops(struct tcf_proto_ops *ops);
26 : int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
27 :
28 : struct 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 :
35 : struct tcf_qevent {
36 : struct tcf_block *block;
37 : struct tcf_block_ext_info info;
38 : struct tcf_proto __rcu *filter_chain;
39 : };
40 :
41 : struct tcf_block_cb;
42 : bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
43 :
44 : #ifdef CONFIG_NET_CLS
45 : struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
46 : u32 chain_index);
47 : void tcf_chain_put_by_act(struct tcf_chain *chain);
48 : struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
49 : struct tcf_chain *chain);
50 : struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
51 : struct tcf_proto *tp);
52 : void tcf_block_netif_keep_dst(struct tcf_block *block);
53 : int 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);
56 : int 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);
59 : void tcf_block_put(struct tcf_block *block);
60 : void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
61 : struct tcf_block_ext_info *ei);
62 :
63 : static inline bool tcf_block_shared(struct tcf_block *block)
64 : {
65 : return block->index;
66 : }
67 :
68 : static inline bool tcf_block_non_null_shared(struct tcf_block *block)
69 : {
70 : return block && block->index;
71 : }
72 :
73 : static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
74 : {
75 : WARN_ON(tcf_block_shared(block));
76 : return block->q;
77 : }
78 :
79 : int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
80 : struct tcf_result *res, bool compat_mode);
81 : int 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
87 : static inline bool tcf_block_shared(struct tcf_block *block)
88 : {
89 : return false;
90 : }
91 :
92 : static inline bool tcf_block_non_null_shared(struct tcf_block *block)
93 : {
94 : return false;
95 : }
96 :
97 : static inline
98 : int 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 :
105 : static inline
106 : int 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 :
113 : static inline void tcf_block_put(struct tcf_block *block)
114 : {
115 : }
116 :
117 : static inline
118 : void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
119 : struct tcf_block_ext_info *ei)
120 : {
121 : }
122 :
123 : static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
124 : {
125 : return NULL;
126 : }
127 :
128 : static inline
129 : int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
130 : void *cb_priv)
131 : {
132 : return 0;
133 : }
134 :
135 : static inline
136 : void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
137 : void *cb_priv)
138 : {
139 : }
140 :
141 : static 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 :
147 : static 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 :
157 : static inline unsigned long
158 : __cls_set_class(unsigned long *clp, unsigned long cl)
159 : {
160 : return xchg(clp, cl);
161 : }
162 :
163 : static 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 :
174 : static inline void
175 : tcf_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 :
189 : static 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 :
198 : static inline void
199 : tcf_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 :
208 : struct 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 :
222 : static 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 : */
243 : static 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 :
253 : static 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 :
269 : static inline void
270 : tcf_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 : */
298 : static 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 : */
318 : static inline int
319 : tcf_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 :
328 : int 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);
332 : void tcf_exts_destroy(struct tcf_exts *exts);
333 : void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
334 : int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
335 : int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
336 : int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
337 :
338 : /**
339 : * struct tcf_pkt_info - packet information
340 : */
341 : struct tcf_pkt_info {
342 : unsigned char * ptr;
343 : int nexthdr;
344 : };
345 :
346 : #ifdef CONFIG_NET_EMATCH
347 :
348 : struct tcf_ematch_ops;
349 :
350 : /**
351 : * struct tcf_ematch - extended match (ematch)
352 : *
353 : * @matchid: identifier to allow userspace to reidentify a match
354 : * @flags: flags specifying attributes and the relation to other matches
355 : * @ops: the operations lookup table of the corresponding ematch module
356 : * @datalen: length of the ematch specific configuration data
357 : * @data: ematch specific data
358 : */
359 : struct tcf_ematch {
360 : struct tcf_ematch_ops * ops;
361 : unsigned long data;
362 : unsigned int datalen;
363 : u16 matchid;
364 : u16 flags;
365 : struct net *net;
366 : };
367 :
368 : static inline int tcf_em_is_container(struct tcf_ematch *em)
369 : {
370 : return !em->ops;
371 : }
372 :
373 : static inline int tcf_em_is_simple(struct tcf_ematch *em)
374 : {
375 : return em->flags & TCF_EM_SIMPLE;
376 : }
377 :
378 : static inline int tcf_em_is_inverted(struct tcf_ematch *em)
379 : {
380 : return em->flags & TCF_EM_INVERT;
381 : }
382 :
383 : static inline int tcf_em_last_match(struct tcf_ematch *em)
384 : {
385 : return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
386 : }
387 :
388 : static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
389 : {
390 : if (tcf_em_last_match(em))
391 : return 1;
392 :
393 : if (result == 0 && em->flags & TCF_EM_REL_AND)
394 : return 1;
395 :
396 : if (result != 0 && em->flags & TCF_EM_REL_OR)
397 : return 1;
398 :
399 : return 0;
400 : }
401 :
402 : /**
403 : * struct tcf_ematch_tree - ematch tree handle
404 : *
405 : * @hdr: ematch tree header supplied by userspace
406 : * @matches: array of ematches
407 : */
408 : struct tcf_ematch_tree {
409 : struct tcf_ematch_tree_hdr hdr;
410 : struct tcf_ematch * matches;
411 :
412 : };
413 :
414 : /**
415 : * struct tcf_ematch_ops - ematch module operations
416 : *
417 : * @kind: identifier (kind) of this ematch module
418 : * @datalen: length of expected configuration data (optional)
419 : * @change: called during validation (optional)
420 : * @match: called during ematch tree evaluation, must return 1/0
421 : * @destroy: called during destroyage (optional)
422 : * @dump: called during dumping process (optional)
423 : * @owner: owner, must be set to THIS_MODULE
424 : * @link: link to previous/next ematch module (internal use)
425 : */
426 : struct tcf_ematch_ops {
427 : int kind;
428 : int datalen;
429 : int (*change)(struct net *net, void *,
430 : int, struct tcf_ematch *);
431 : int (*match)(struct sk_buff *, struct tcf_ematch *,
432 : struct tcf_pkt_info *);
433 : void (*destroy)(struct tcf_ematch *);
434 : int (*dump)(struct sk_buff *, struct tcf_ematch *);
435 : struct module *owner;
436 : struct list_head link;
437 : };
438 :
439 : int tcf_em_register(struct tcf_ematch_ops *);
440 : void tcf_em_unregister(struct tcf_ematch_ops *);
441 : int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
442 : struct tcf_ematch_tree *);
443 : void tcf_em_tree_destroy(struct tcf_ematch_tree *);
444 : int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
445 : int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
446 : struct tcf_pkt_info *);
447 :
448 : /**
449 : * tcf_em_tree_match - evaulate an ematch tree
450 : *
451 : * @skb: socket buffer of the packet in question
452 : * @tree: ematch tree to be used for evaluation
453 : * @info: packet information examined by classifier
454 : *
455 : * This function matches @skb against the ematch tree in @tree by going
456 : * through all ematches respecting their logic relations returning
457 : * as soon as the result is obvious.
458 : *
459 : * Returns 1 if the ematch tree as-one matches, no ematches are configured
460 : * or ematch is not enabled in the kernel, otherwise 0 is returned.
461 : */
462 : static inline int tcf_em_tree_match(struct sk_buff *skb,
463 : struct tcf_ematch_tree *tree,
464 : struct tcf_pkt_info *info)
465 : {
466 : if (tree->hdr.nmatches)
467 : return __tcf_em_tree_match(skb, tree, info);
468 : else
469 : return 1;
470 : }
471 :
472 : #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
473 :
474 : #else /* CONFIG_NET_EMATCH */
475 :
476 : struct tcf_ematch_tree {
477 : };
478 :
479 : #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
480 : #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
481 : #define tcf_em_tree_dump(skb, t, tlv) (0)
482 : #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
483 :
484 : #endif /* CONFIG_NET_EMATCH */
485 :
486 : static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
487 : {
488 : switch (layer) {
489 : case TCF_LAYER_LINK:
490 : return skb_mac_header(skb);
491 : case TCF_LAYER_NETWORK:
492 : return skb_network_header(skb);
493 : case TCF_LAYER_TRANSPORT:
494 : return skb_transport_header(skb);
495 : }
496 :
497 : return NULL;
498 : }
499 :
500 : static inline int tcf_valid_offset(const struct sk_buff *skb,
501 : const unsigned char *ptr, const int len)
502 : {
503 : return likely((ptr + len) <= skb_tail_pointer(skb) &&
504 : ptr >= skb->head &&
505 : (ptr <= (ptr + len)));
506 : }
507 :
508 : static inline int
509 : tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
510 : struct netlink_ext_ack *extack)
511 : {
512 : char indev[IFNAMSIZ];
513 : struct net_device *dev;
514 :
515 : if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
516 : NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
517 : "Interface name too long");
518 : return -EINVAL;
519 : }
520 : dev = __dev_get_by_name(net, indev);
521 : if (!dev) {
522 : NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
523 : "Network device not found");
524 : return -ENODEV;
525 : }
526 : return dev->ifindex;
527 : }
528 :
529 : static inline bool
530 : tcf_match_indev(struct sk_buff *skb, int ifindex)
531 : {
532 : if (!ifindex)
533 : return true;
534 : if (!skb->skb_iif)
535 : return false;
536 : return ifindex == skb->skb_iif;
537 : }
538 :
539 : int tc_setup_flow_action(struct flow_action *flow_action,
540 : const struct tcf_exts *exts);
541 : void tc_cleanup_flow_action(struct flow_action *flow_action);
542 :
543 : int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
544 : void *type_data, bool err_stop, bool rtnl_held);
545 : int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
546 : enum tc_setup_type type, void *type_data, bool err_stop,
547 : u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
548 : int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
549 : enum tc_setup_type type, void *type_data, bool err_stop,
550 : u32 *old_flags, unsigned int *old_in_hw_count,
551 : u32 *new_flags, unsigned int *new_in_hw_count,
552 : bool rtnl_held);
553 : int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
554 : enum tc_setup_type type, void *type_data, bool err_stop,
555 : u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
556 : int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
557 : bool add, flow_setup_cb_t *cb,
558 : enum tc_setup_type type, void *type_data,
559 : void *cb_priv, u32 *flags, unsigned int *in_hw_count);
560 : unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
561 :
562 : #ifdef CONFIG_NET_CLS_ACT
563 : int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
564 : enum flow_block_binder_type binder_type,
565 : struct nlattr *block_index_attr,
566 : struct netlink_ext_ack *extack);
567 : void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
568 : int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
569 : struct netlink_ext_ack *extack);
570 : struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
571 : struct sk_buff **to_free, int *ret);
572 : int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
573 : #else
574 : static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
575 : enum flow_block_binder_type binder_type,
576 : struct nlattr *block_index_attr,
577 : struct netlink_ext_ack *extack)
578 : {
579 : return 0;
580 : }
581 :
582 : static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
583 : {
584 : }
585 :
586 : static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
587 : struct netlink_ext_ack *extack)
588 : {
589 : return 0;
590 : }
591 :
592 : static inline struct sk_buff *
593 : tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
594 : struct sk_buff **to_free, int *ret)
595 : {
596 : return skb;
597 : }
598 :
599 : static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
600 : {
601 : return 0;
602 : }
603 : #endif
604 :
605 : struct tc_cls_u32_knode {
606 : struct tcf_exts *exts;
607 : struct tcf_result *res;
608 : struct tc_u32_sel *sel;
609 : u32 handle;
610 : u32 val;
611 : u32 mask;
612 : u32 link_handle;
613 : u8 fshift;
614 : };
615 :
616 : struct tc_cls_u32_hnode {
617 : u32 handle;
618 : u32 prio;
619 : unsigned int divisor;
620 : };
621 :
622 : enum tc_clsu32_command {
623 : TC_CLSU32_NEW_KNODE,
624 : TC_CLSU32_REPLACE_KNODE,
625 : TC_CLSU32_DELETE_KNODE,
626 : TC_CLSU32_NEW_HNODE,
627 : TC_CLSU32_REPLACE_HNODE,
628 : TC_CLSU32_DELETE_HNODE,
629 : };
630 :
631 : struct tc_cls_u32_offload {
632 : struct flow_cls_common_offload common;
633 : /* knode values */
634 : enum tc_clsu32_command command;
635 : union {
636 : struct tc_cls_u32_knode knode;
637 : struct tc_cls_u32_hnode hnode;
638 : };
639 : };
640 :
641 0 : static inline bool tc_can_offload(const struct net_device *dev)
642 : {
643 0 : return dev->features & NETIF_F_HW_TC;
644 : }
645 :
646 : static inline bool tc_can_offload_extack(const struct net_device *dev,
647 : struct netlink_ext_ack *extack)
648 : {
649 : bool can = tc_can_offload(dev);
650 :
651 : if (!can)
652 : NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
653 :
654 : return can;
655 : }
656 :
657 : static inline bool
658 : tc_cls_can_offload_and_chain0(const struct net_device *dev,
659 : struct flow_cls_common_offload *common)
660 : {
661 : if (!tc_can_offload_extack(dev, common->extack))
662 : return false;
663 : if (common->chain_index) {
664 : NL_SET_ERR_MSG(common->extack,
665 : "Driver supports only offload of chain 0");
666 : return false;
667 : }
668 : return true;
669 : }
670 :
671 : static inline bool tc_skip_hw(u32 flags)
672 : {
673 : return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
674 : }
675 :
676 : static inline bool tc_skip_sw(u32 flags)
677 : {
678 : return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
679 : }
680 :
681 : /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
682 : static inline bool tc_flags_valid(u32 flags)
683 : {
684 : if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
685 : TCA_CLS_FLAGS_VERBOSE))
686 : return false;
687 :
688 : flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
689 : if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
690 : return false;
691 :
692 : return true;
693 : }
694 :
695 : static inline bool tc_in_hw(u32 flags)
696 : {
697 : return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
698 : }
699 :
700 : static inline void
701 : tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
702 : const struct tcf_proto *tp, u32 flags,
703 : struct netlink_ext_ack *extack)
704 : {
705 : cls_common->chain_index = tp->chain->index;
706 : cls_common->protocol = tp->protocol;
707 : cls_common->prio = tp->prio >> 16;
708 : if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
709 : cls_common->extack = extack;
710 : }
711 :
712 : enum tc_matchall_command {
713 : TC_CLSMATCHALL_REPLACE,
714 : TC_CLSMATCHALL_DESTROY,
715 : TC_CLSMATCHALL_STATS,
716 : };
717 :
718 : struct tc_cls_matchall_offload {
719 : struct flow_cls_common_offload common;
720 : enum tc_matchall_command command;
721 : struct flow_rule *rule;
722 : struct flow_stats stats;
723 : unsigned long cookie;
724 : };
725 :
726 : enum tc_clsbpf_command {
727 : TC_CLSBPF_OFFLOAD,
728 : TC_CLSBPF_STATS,
729 : };
730 :
731 : struct tc_cls_bpf_offload {
732 : struct flow_cls_common_offload common;
733 : enum tc_clsbpf_command command;
734 : struct tcf_exts *exts;
735 : struct bpf_prog *prog;
736 : struct bpf_prog *oldprog;
737 : const char *name;
738 : bool exts_integrated;
739 : };
740 :
741 : struct tc_mqprio_qopt_offload {
742 : /* struct tc_mqprio_qopt must always be the first element */
743 : struct tc_mqprio_qopt qopt;
744 : u16 mode;
745 : u16 shaper;
746 : u32 flags;
747 : u64 min_rate[TC_QOPT_MAX_QUEUE];
748 : u64 max_rate[TC_QOPT_MAX_QUEUE];
749 : };
750 :
751 : /* This structure holds cookie structure that is passed from user
752 : * to the kernel for actions and classifiers
753 : */
754 : struct tc_cookie {
755 : u8 *data;
756 : u32 len;
757 : struct rcu_head rcu;
758 : };
759 :
760 : struct tc_qopt_offload_stats {
761 : struct gnet_stats_basic_packed *bstats;
762 : struct gnet_stats_queue *qstats;
763 : };
764 :
765 : enum tc_mq_command {
766 : TC_MQ_CREATE,
767 : TC_MQ_DESTROY,
768 : TC_MQ_STATS,
769 : TC_MQ_GRAFT,
770 : };
771 :
772 : struct tc_mq_opt_offload_graft_params {
773 : unsigned long queue;
774 : u32 child_handle;
775 : };
776 :
777 : struct tc_mq_qopt_offload {
778 : enum tc_mq_command command;
779 : u32 handle;
780 : union {
781 : struct tc_qopt_offload_stats stats;
782 : struct tc_mq_opt_offload_graft_params graft_params;
783 : };
784 : };
785 :
786 : enum tc_htb_command {
787 : /* Root */
788 : TC_HTB_CREATE, /* Initialize HTB offload. */
789 : TC_HTB_DESTROY, /* Destroy HTB offload. */
790 :
791 : /* Classes */
792 : /* Allocate qid and create leaf. */
793 : TC_HTB_LEAF_ALLOC_QUEUE,
794 : /* Convert leaf to inner, preserve and return qid, create new leaf. */
795 : TC_HTB_LEAF_TO_INNER,
796 : /* Delete leaf, while siblings remain. */
797 : TC_HTB_LEAF_DEL,
798 : /* Delete leaf, convert parent to leaf, preserving qid. */
799 : TC_HTB_LEAF_DEL_LAST,
800 : /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
801 : TC_HTB_LEAF_DEL_LAST_FORCE,
802 : /* Modify parameters of a node. */
803 : TC_HTB_NODE_MODIFY,
804 :
805 : /* Class qdisc */
806 : TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
807 : };
808 :
809 : struct tc_htb_qopt_offload {
810 : struct netlink_ext_ack *extack;
811 : enum tc_htb_command command;
812 : u16 classid;
813 : u32 parent_classid;
814 : u16 qid;
815 : u16 moved_qid;
816 : u64 rate;
817 : u64 ceil;
818 : };
819 :
820 : #define TC_HTB_CLASSID_ROOT U32_MAX
821 :
822 : enum tc_red_command {
823 : TC_RED_REPLACE,
824 : TC_RED_DESTROY,
825 : TC_RED_STATS,
826 : TC_RED_XSTATS,
827 : TC_RED_GRAFT,
828 : };
829 :
830 : struct tc_red_qopt_offload_params {
831 : u32 min;
832 : u32 max;
833 : u32 probability;
834 : u32 limit;
835 : bool is_ecn;
836 : bool is_harddrop;
837 : bool is_nodrop;
838 : struct gnet_stats_queue *qstats;
839 : };
840 :
841 : struct tc_red_qopt_offload {
842 : enum tc_red_command command;
843 : u32 handle;
844 : u32 parent;
845 : union {
846 : struct tc_red_qopt_offload_params set;
847 : struct tc_qopt_offload_stats stats;
848 : struct red_stats *xstats;
849 : u32 child_handle;
850 : };
851 : };
852 :
853 : enum tc_gred_command {
854 : TC_GRED_REPLACE,
855 : TC_GRED_DESTROY,
856 : TC_GRED_STATS,
857 : };
858 :
859 : struct tc_gred_vq_qopt_offload_params {
860 : bool present;
861 : u32 limit;
862 : u32 prio;
863 : u32 min;
864 : u32 max;
865 : bool is_ecn;
866 : bool is_harddrop;
867 : u32 probability;
868 : /* Only need backlog, see struct tc_prio_qopt_offload_params */
869 : u32 *backlog;
870 : };
871 :
872 : struct tc_gred_qopt_offload_params {
873 : bool grio_on;
874 : bool wred_on;
875 : unsigned int dp_cnt;
876 : unsigned int dp_def;
877 : struct gnet_stats_queue *qstats;
878 : struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
879 : };
880 :
881 : struct tc_gred_qopt_offload_stats {
882 : struct gnet_stats_basic_packed bstats[MAX_DPs];
883 : struct gnet_stats_queue qstats[MAX_DPs];
884 : struct red_stats *xstats[MAX_DPs];
885 : };
886 :
887 : struct tc_gred_qopt_offload {
888 : enum tc_gred_command command;
889 : u32 handle;
890 : u32 parent;
891 : union {
892 : struct tc_gred_qopt_offload_params set;
893 : struct tc_gred_qopt_offload_stats stats;
894 : };
895 : };
896 :
897 : enum tc_prio_command {
898 : TC_PRIO_REPLACE,
899 : TC_PRIO_DESTROY,
900 : TC_PRIO_STATS,
901 : TC_PRIO_GRAFT,
902 : };
903 :
904 : struct tc_prio_qopt_offload_params {
905 : int bands;
906 : u8 priomap[TC_PRIO_MAX + 1];
907 : /* At the point of un-offloading the Qdisc, the reported backlog and
908 : * qlen need to be reduced by the portion that is in HW.
909 : */
910 : struct gnet_stats_queue *qstats;
911 : };
912 :
913 : struct tc_prio_qopt_offload_graft_params {
914 : u8 band;
915 : u32 child_handle;
916 : };
917 :
918 : struct tc_prio_qopt_offload {
919 : enum tc_prio_command command;
920 : u32 handle;
921 : u32 parent;
922 : union {
923 : struct tc_prio_qopt_offload_params replace_params;
924 : struct tc_qopt_offload_stats stats;
925 : struct tc_prio_qopt_offload_graft_params graft_params;
926 : };
927 : };
928 :
929 : enum tc_root_command {
930 : TC_ROOT_GRAFT,
931 : };
932 :
933 : struct tc_root_qopt_offload {
934 : enum tc_root_command command;
935 : u32 handle;
936 : bool ingress;
937 : };
938 :
939 : enum tc_ets_command {
940 : TC_ETS_REPLACE,
941 : TC_ETS_DESTROY,
942 : TC_ETS_STATS,
943 : TC_ETS_GRAFT,
944 : };
945 :
946 : struct tc_ets_qopt_offload_replace_params {
947 : unsigned int bands;
948 : u8 priomap[TC_PRIO_MAX + 1];
949 : unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
950 : unsigned int weights[TCQ_ETS_MAX_BANDS];
951 : struct gnet_stats_queue *qstats;
952 : };
953 :
954 : struct tc_ets_qopt_offload_graft_params {
955 : u8 band;
956 : u32 child_handle;
957 : };
958 :
959 : struct tc_ets_qopt_offload {
960 : enum tc_ets_command command;
961 : u32 handle;
962 : u32 parent;
963 : union {
964 : struct tc_ets_qopt_offload_replace_params replace_params;
965 : struct tc_qopt_offload_stats stats;
966 : struct tc_ets_qopt_offload_graft_params graft_params;
967 : };
968 : };
969 :
970 : enum tc_tbf_command {
971 : TC_TBF_REPLACE,
972 : TC_TBF_DESTROY,
973 : TC_TBF_STATS,
974 : };
975 :
976 : struct tc_tbf_qopt_offload_replace_params {
977 : struct psched_ratecfg rate;
978 : u32 max_size;
979 : struct gnet_stats_queue *qstats;
980 : };
981 :
982 : struct tc_tbf_qopt_offload {
983 : enum tc_tbf_command command;
984 : u32 handle;
985 : u32 parent;
986 : union {
987 : struct tc_tbf_qopt_offload_replace_params replace_params;
988 : struct tc_qopt_offload_stats stats;
989 : };
990 : };
991 :
992 : enum tc_fifo_command {
993 : TC_FIFO_REPLACE,
994 : TC_FIFO_DESTROY,
995 : TC_FIFO_STATS,
996 : };
997 :
998 : struct tc_fifo_qopt_offload {
999 : enum tc_fifo_command command;
1000 : u32 handle;
1001 : u32 parent;
1002 : union {
1003 : struct tc_qopt_offload_stats stats;
1004 : };
1005 : };
1006 :
1007 : #endif
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