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/flow_offload.h> |
10 | |
11 | /* TC action not accessible from user space */ |
12 | #define TC_ACT_REINSERT (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 | enum tcf_block_binder_type { |
29 | TCF_BLOCK_BINDER_TYPE_UNSPEC, |
30 | TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS, |
31 | TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS, |
32 | }; |
33 | |
34 | struct tcf_block_ext_info { |
35 | enum tcf_block_binder_type binder_type; |
36 | tcf_chain_head_change_t *chain_head_change; |
37 | void *chain_head_change_priv; |
38 | u32 block_index; |
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, bool rtnl_held); |
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 struct Qdisc *tcf_block_q(struct tcf_block *block) |
69 | { |
70 | WARN_ON(tcf_block_shared(block)); |
71 | return block->q; |
72 | } |
73 | |
74 | void *tcf_block_cb_priv(struct tcf_block_cb *block_cb); |
75 | struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block, |
76 | tc_setup_cb_t *cb, void *cb_ident); |
77 | void tcf_block_cb_incref(struct tcf_block_cb *block_cb); |
78 | unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb); |
79 | struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block, |
80 | tc_setup_cb_t *cb, void *cb_ident, |
81 | void *cb_priv, |
82 | struct netlink_ext_ack *extack); |
83 | int tcf_block_cb_register(struct tcf_block *block, |
84 | tc_setup_cb_t *cb, void *cb_ident, |
85 | void *cb_priv, struct netlink_ext_ack *extack); |
86 | void __tcf_block_cb_unregister(struct tcf_block *block, |
87 | struct tcf_block_cb *block_cb); |
88 | void tcf_block_cb_unregister(struct tcf_block *block, |
89 | tc_setup_cb_t *cb, void *cb_ident); |
90 | int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv, |
91 | tc_indr_block_bind_cb_t *cb, void *cb_ident); |
92 | int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv, |
93 | tc_indr_block_bind_cb_t *cb, void *cb_ident); |
94 | void __tc_indr_block_cb_unregister(struct net_device *dev, |
95 | tc_indr_block_bind_cb_t *cb, void *cb_ident); |
96 | void tc_indr_block_cb_unregister(struct net_device *dev, |
97 | tc_indr_block_bind_cb_t *cb, void *cb_ident); |
98 | |
99 | int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
100 | struct tcf_result *res, bool compat_mode); |
101 | |
102 | #else |
103 | static inline |
104 | int tcf_block_get(struct tcf_block **p_block, |
105 | struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, |
106 | struct netlink_ext_ack *extack) |
107 | { |
108 | return 0; |
109 | } |
110 | |
111 | static inline |
112 | int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, |
113 | struct tcf_block_ext_info *ei, |
114 | struct netlink_ext_ack *extack) |
115 | { |
116 | return 0; |
117 | } |
118 | |
119 | static inline void tcf_block_put(struct tcf_block *block) |
120 | { |
121 | } |
122 | |
123 | static inline |
124 | void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, |
125 | struct tcf_block_ext_info *ei) |
126 | { |
127 | } |
128 | |
129 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
130 | { |
131 | return NULL; |
132 | } |
133 | |
134 | static inline |
135 | int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb, |
136 | void *cb_priv) |
137 | { |
138 | return 0; |
139 | } |
140 | |
141 | static inline |
142 | void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb, |
143 | void *cb_priv) |
144 | { |
145 | } |
146 | |
147 | static inline |
148 | void *tcf_block_cb_priv(struct tcf_block_cb *block_cb) |
149 | { |
150 | return NULL; |
151 | } |
152 | |
153 | static inline |
154 | struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block, |
155 | tc_setup_cb_t *cb, void *cb_ident) |
156 | { |
157 | return NULL; |
158 | } |
159 | |
160 | static inline |
161 | void tcf_block_cb_incref(struct tcf_block_cb *block_cb) |
162 | { |
163 | } |
164 | |
165 | static inline |
166 | unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb) |
167 | { |
168 | return 0; |
169 | } |
170 | |
171 | static inline |
172 | struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block, |
173 | tc_setup_cb_t *cb, void *cb_ident, |
174 | void *cb_priv, |
175 | struct netlink_ext_ack *extack) |
176 | { |
177 | return NULL; |
178 | } |
179 | |
180 | static inline |
181 | int tcf_block_cb_register(struct tcf_block *block, |
182 | tc_setup_cb_t *cb, void *cb_ident, |
183 | void *cb_priv, struct netlink_ext_ack *extack) |
184 | { |
185 | return 0; |
186 | } |
187 | |
188 | static inline |
189 | void __tcf_block_cb_unregister(struct tcf_block *block, |
190 | struct tcf_block_cb *block_cb) |
191 | { |
192 | } |
193 | |
194 | static inline |
195 | void tcf_block_cb_unregister(struct tcf_block *block, |
196 | tc_setup_cb_t *cb, void *cb_ident) |
197 | { |
198 | } |
199 | |
200 | static inline |
201 | int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv, |
202 | tc_indr_block_bind_cb_t *cb, void *cb_ident) |
203 | { |
204 | return 0; |
205 | } |
206 | |
207 | static inline |
208 | int tc_indr_block_cb_register(struct net_device *dev, void *cb_priv, |
209 | tc_indr_block_bind_cb_t *cb, void *cb_ident) |
210 | { |
211 | return 0; |
212 | } |
213 | |
214 | static inline |
215 | void __tc_indr_block_cb_unregister(struct net_device *dev, |
216 | tc_indr_block_bind_cb_t *cb, void *cb_ident) |
217 | { |
218 | } |
219 | |
220 | static inline |
221 | void tc_indr_block_cb_unregister(struct net_device *dev, |
222 | tc_indr_block_bind_cb_t *cb, void *cb_ident) |
223 | { |
224 | } |
225 | |
226 | static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
227 | struct tcf_result *res, bool compat_mode) |
228 | { |
229 | return TC_ACT_UNSPEC; |
230 | } |
231 | #endif |
232 | |
233 | static inline unsigned long |
234 | __cls_set_class(unsigned long *clp, unsigned long cl) |
235 | { |
236 | return xchg(clp, cl); |
237 | } |
238 | |
239 | static inline unsigned long |
240 | cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl) |
241 | { |
242 | unsigned long old_cl; |
243 | |
244 | sch_tree_lock(q); |
245 | old_cl = __cls_set_class(clp, cl); |
246 | sch_tree_unlock(q); |
247 | return old_cl; |
248 | } |
249 | |
250 | static inline void |
251 | tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) |
252 | { |
253 | struct Qdisc *q = tp->chain->block->q; |
254 | unsigned long cl; |
255 | |
256 | /* Check q as it is not set for shared blocks. In that case, |
257 | * setting class is not supported. |
258 | */ |
259 | if (!q) |
260 | return; |
261 | cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); |
262 | cl = cls_set_class(q, &r->class, cl); |
263 | if (cl) |
264 | q->ops->cl_ops->unbind_tcf(q, cl); |
265 | } |
266 | |
267 | static inline void |
268 | tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) |
269 | { |
270 | struct Qdisc *q = tp->chain->block->q; |
271 | unsigned long cl; |
272 | |
273 | if (!q) |
274 | return; |
275 | if ((cl = __cls_set_class(&r->class, 0)) != 0) |
276 | q->ops->cl_ops->unbind_tcf(q, cl); |
277 | } |
278 | |
279 | struct tcf_exts { |
280 | #ifdef CONFIG_NET_CLS_ACT |
281 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
282 | int nr_actions; |
283 | struct tc_action **actions; |
284 | struct net *net; |
285 | #endif |
286 | /* Map to export classifier specific extension TLV types to the |
287 | * generic extensions API. Unsupported extensions must be set to 0. |
288 | */ |
289 | int action; |
290 | int police; |
291 | }; |
292 | |
293 | static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, |
294 | int action, int police) |
295 | { |
296 | #ifdef CONFIG_NET_CLS_ACT |
297 | exts->type = 0; |
298 | exts->nr_actions = 0; |
299 | exts->net = net; |
300 | exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), |
301 | GFP_KERNEL); |
302 | if (!exts->actions) |
303 | return -ENOMEM; |
304 | #endif |
305 | exts->action = action; |
306 | exts->police = police; |
307 | return 0; |
308 | } |
309 | |
310 | /* Return false if the netns is being destroyed in cleanup_net(). Callers |
311 | * need to do cleanup synchronously in this case, otherwise may race with |
312 | * tc_action_net_exit(). Return true for other cases. |
313 | */ |
314 | static inline bool tcf_exts_get_net(struct tcf_exts *exts) |
315 | { |
316 | #ifdef CONFIG_NET_CLS_ACT |
317 | exts->net = maybe_get_net(exts->net); |
318 | return exts->net != NULL; |
319 | #else |
320 | return true; |
321 | #endif |
322 | } |
323 | |
324 | static inline void tcf_exts_put_net(struct tcf_exts *exts) |
325 | { |
326 | #ifdef CONFIG_NET_CLS_ACT |
327 | if (exts->net) |
328 | put_net(exts->net); |
329 | #endif |
330 | } |
331 | |
332 | #ifdef CONFIG_NET_CLS_ACT |
333 | #define tcf_exts_for_each_action(i, a, exts) \ |
334 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) |
335 | #else |
336 | #define tcf_exts_for_each_action(i, a, exts) \ |
337 | for (; 0; (void)(i), (void)(a), (void)(exts)) |
338 | #endif |
339 | |
340 | static inline void |
341 | tcf_exts_stats_update(const struct tcf_exts *exts, |
342 | u64 bytes, u64 packets, u64 lastuse) |
343 | { |
344 | #ifdef CONFIG_NET_CLS_ACT |
345 | int i; |
346 | |
347 | preempt_disable(); |
348 | |
349 | for (i = 0; i < exts->nr_actions; i++) { |
350 | struct tc_action *a = exts->actions[i]; |
351 | |
352 | tcf_action_stats_update(a, bytes, packets, lastuse, true); |
353 | } |
354 | |
355 | preempt_enable(); |
356 | #endif |
357 | } |
358 | |
359 | /** |
360 | * tcf_exts_has_actions - check if at least one action is present |
361 | * @exts: tc filter extensions handle |
362 | * |
363 | * Returns true if at least one action is present. |
364 | */ |
365 | static inline bool tcf_exts_has_actions(struct tcf_exts *exts) |
366 | { |
367 | #ifdef CONFIG_NET_CLS_ACT |
368 | return exts->nr_actions; |
369 | #else |
370 | return false; |
371 | #endif |
372 | } |
373 | |
374 | /** |
375 | * tcf_exts_has_one_action - check if exactly one action is present |
376 | * @exts: tc filter extensions handle |
377 | * |
378 | * Returns true if exactly one action is present. |
379 | */ |
380 | static inline bool tcf_exts_has_one_action(struct tcf_exts *exts) |
381 | { |
382 | #ifdef CONFIG_NET_CLS_ACT |
383 | return exts->nr_actions == 1; |
384 | #else |
385 | return false; |
386 | #endif |
387 | } |
388 | |
389 | static inline struct tc_action *tcf_exts_first_action(struct tcf_exts *exts) |
390 | { |
391 | #ifdef CONFIG_NET_CLS_ACT |
392 | return exts->actions[0]; |
393 | #else |
394 | return NULL; |
395 | #endif |
396 | } |
397 | |
398 | /** |
399 | * tcf_exts_exec - execute tc filter extensions |
400 | * @skb: socket buffer |
401 | * @exts: tc filter extensions handle |
402 | * @res: desired result |
403 | * |
404 | * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, |
405 | * a negative number if the filter must be considered unmatched or |
406 | * a positive action code (TC_ACT_*) which must be returned to the |
407 | * underlying layer. |
408 | */ |
409 | static inline int |
410 | tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, |
411 | struct tcf_result *res) |
412 | { |
413 | #ifdef CONFIG_NET_CLS_ACT |
414 | return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); |
415 | #endif |
416 | return TC_ACT_OK; |
417 | } |
418 | |
419 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, |
420 | struct nlattr **tb, struct nlattr *rate_tlv, |
421 | struct tcf_exts *exts, bool ovr, bool rtnl_held, |
422 | struct netlink_ext_ack *extack); |
423 | void tcf_exts_destroy(struct tcf_exts *exts); |
424 | void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); |
425 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); |
426 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); |
427 | |
428 | /** |
429 | * struct tcf_pkt_info - packet information |
430 | */ |
431 | struct tcf_pkt_info { |
432 | unsigned char * ptr; |
433 | int nexthdr; |
434 | }; |
435 | |
436 | #ifdef CONFIG_NET_EMATCH |
437 | |
438 | struct tcf_ematch_ops; |
439 | |
440 | /** |
441 | * struct tcf_ematch - extended match (ematch) |
442 | * |
443 | * @matchid: identifier to allow userspace to reidentify a match |
444 | * @flags: flags specifying attributes and the relation to other matches |
445 | * @ops: the operations lookup table of the corresponding ematch module |
446 | * @datalen: length of the ematch specific configuration data |
447 | * @data: ematch specific data |
448 | */ |
449 | struct tcf_ematch { |
450 | struct tcf_ematch_ops * ops; |
451 | unsigned long data; |
452 | unsigned int datalen; |
453 | u16 matchid; |
454 | u16 flags; |
455 | struct net *net; |
456 | }; |
457 | |
458 | static inline int tcf_em_is_container(struct tcf_ematch *em) |
459 | { |
460 | return !em->ops; |
461 | } |
462 | |
463 | static inline int tcf_em_is_simple(struct tcf_ematch *em) |
464 | { |
465 | return em->flags & TCF_EM_SIMPLE; |
466 | } |
467 | |
468 | static inline int tcf_em_is_inverted(struct tcf_ematch *em) |
469 | { |
470 | return em->flags & TCF_EM_INVERT; |
471 | } |
472 | |
473 | static inline int tcf_em_last_match(struct tcf_ematch *em) |
474 | { |
475 | return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; |
476 | } |
477 | |
478 | static inline int tcf_em_early_end(struct tcf_ematch *em, int result) |
479 | { |
480 | if (tcf_em_last_match(em)) |
481 | return 1; |
482 | |
483 | if (result == 0 && em->flags & TCF_EM_REL_AND) |
484 | return 1; |
485 | |
486 | if (result != 0 && em->flags & TCF_EM_REL_OR) |
487 | return 1; |
488 | |
489 | return 0; |
490 | } |
491 | |
492 | /** |
493 | * struct tcf_ematch_tree - ematch tree handle |
494 | * |
495 | * @hdr: ematch tree header supplied by userspace |
496 | * @matches: array of ematches |
497 | */ |
498 | struct tcf_ematch_tree { |
499 | struct tcf_ematch_tree_hdr hdr; |
500 | struct tcf_ematch * matches; |
501 | |
502 | }; |
503 | |
504 | /** |
505 | * struct tcf_ematch_ops - ematch module operations |
506 | * |
507 | * @kind: identifier (kind) of this ematch module |
508 | * @datalen: length of expected configuration data (optional) |
509 | * @change: called during validation (optional) |
510 | * @match: called during ematch tree evaluation, must return 1/0 |
511 | * @destroy: called during destroyage (optional) |
512 | * @dump: called during dumping process (optional) |
513 | * @owner: owner, must be set to THIS_MODULE |
514 | * @link: link to previous/next ematch module (internal use) |
515 | */ |
516 | struct tcf_ematch_ops { |
517 | int kind; |
518 | int datalen; |
519 | int (*change)(struct net *net, void *, |
520 | int, struct tcf_ematch *); |
521 | int (*match)(struct sk_buff *, struct tcf_ematch *, |
522 | struct tcf_pkt_info *); |
523 | void (*destroy)(struct tcf_ematch *); |
524 | int (*dump)(struct sk_buff *, struct tcf_ematch *); |
525 | struct module *owner; |
526 | struct list_head link; |
527 | }; |
528 | |
529 | int tcf_em_register(struct tcf_ematch_ops *); |
530 | void tcf_em_unregister(struct tcf_ematch_ops *); |
531 | int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, |
532 | struct tcf_ematch_tree *); |
533 | void tcf_em_tree_destroy(struct tcf_ematch_tree *); |
534 | int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); |
535 | int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, |
536 | struct tcf_pkt_info *); |
537 | |
538 | /** |
539 | * tcf_em_tree_match - evaulate an ematch tree |
540 | * |
541 | * @skb: socket buffer of the packet in question |
542 | * @tree: ematch tree to be used for evaluation |
543 | * @info: packet information examined by classifier |
544 | * |
545 | * This function matches @skb against the ematch tree in @tree by going |
546 | * through all ematches respecting their logic relations returning |
547 | * as soon as the result is obvious. |
548 | * |
549 | * Returns 1 if the ematch tree as-one matches, no ematches are configured |
550 | * or ematch is not enabled in the kernel, otherwise 0 is returned. |
551 | */ |
552 | static inline int tcf_em_tree_match(struct sk_buff *skb, |
553 | struct tcf_ematch_tree *tree, |
554 | struct tcf_pkt_info *info) |
555 | { |
556 | if (tree->hdr.nmatches) |
557 | return __tcf_em_tree_match(skb, tree, info); |
558 | else |
559 | return 1; |
560 | } |
561 | |
562 | #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) |
563 | |
564 | #else /* CONFIG_NET_EMATCH */ |
565 | |
566 | struct tcf_ematch_tree { |
567 | }; |
568 | |
569 | #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) |
570 | #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) |
571 | #define tcf_em_tree_dump(skb, t, tlv) (0) |
572 | #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) |
573 | |
574 | #endif /* CONFIG_NET_EMATCH */ |
575 | |
576 | static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) |
577 | { |
578 | switch (layer) { |
579 | case TCF_LAYER_LINK: |
580 | return skb_mac_header(skb); |
581 | case TCF_LAYER_NETWORK: |
582 | return skb_network_header(skb); |
583 | case TCF_LAYER_TRANSPORT: |
584 | return skb_transport_header(skb); |
585 | } |
586 | |
587 | return NULL; |
588 | } |
589 | |
590 | static inline int tcf_valid_offset(const struct sk_buff *skb, |
591 | const unsigned char *ptr, const int len) |
592 | { |
593 | return likely((ptr + len) <= skb_tail_pointer(skb) && |
594 | ptr >= skb->head && |
595 | (ptr <= (ptr + len))); |
596 | } |
597 | |
598 | #ifdef CONFIG_NET_CLS_IND |
599 | #include <net/net_namespace.h> |
600 | |
601 | static inline int |
602 | tcf_change_indev(struct net *net, struct nlattr *indev_tlv, |
603 | struct netlink_ext_ack *extack) |
604 | { |
605 | char indev[IFNAMSIZ]; |
606 | struct net_device *dev; |
607 | |
608 | if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) { |
609 | NL_SET_ERR_MSG(extack, "Interface name too long" ); |
610 | return -EINVAL; |
611 | } |
612 | dev = __dev_get_by_name(net, indev); |
613 | if (!dev) |
614 | return -ENODEV; |
615 | return dev->ifindex; |
616 | } |
617 | |
618 | static inline bool |
619 | tcf_match_indev(struct sk_buff *skb, int ifindex) |
620 | { |
621 | if (!ifindex) |
622 | return true; |
623 | if (!skb->skb_iif) |
624 | return false; |
625 | return ifindex == skb->skb_iif; |
626 | } |
627 | #endif /* CONFIG_NET_CLS_IND */ |
628 | |
629 | int tc_setup_flow_action(struct flow_action *flow_action, |
630 | const struct tcf_exts *exts); |
631 | int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, |
632 | void *type_data, bool err_stop); |
633 | unsigned int tcf_exts_num_actions(struct tcf_exts *exts); |
634 | |
635 | enum tc_block_command { |
636 | TC_BLOCK_BIND, |
637 | TC_BLOCK_UNBIND, |
638 | }; |
639 | |
640 | struct tc_block_offload { |
641 | enum tc_block_command command; |
642 | enum tcf_block_binder_type binder_type; |
643 | struct tcf_block *block; |
644 | struct netlink_ext_ack *extack; |
645 | }; |
646 | |
647 | struct tc_cls_common_offload { |
648 | u32 chain_index; |
649 | __be16 protocol; |
650 | u32 prio; |
651 | struct netlink_ext_ack *extack; |
652 | }; |
653 | |
654 | struct tc_cls_u32_knode { |
655 | struct tcf_exts *exts; |
656 | struct tcf_result *res; |
657 | struct tc_u32_sel *sel; |
658 | u32 handle; |
659 | u32 val; |
660 | u32 mask; |
661 | u32 link_handle; |
662 | u8 fshift; |
663 | }; |
664 | |
665 | struct tc_cls_u32_hnode { |
666 | u32 handle; |
667 | u32 prio; |
668 | unsigned int divisor; |
669 | }; |
670 | |
671 | enum tc_clsu32_command { |
672 | TC_CLSU32_NEW_KNODE, |
673 | TC_CLSU32_REPLACE_KNODE, |
674 | TC_CLSU32_DELETE_KNODE, |
675 | TC_CLSU32_NEW_HNODE, |
676 | TC_CLSU32_REPLACE_HNODE, |
677 | TC_CLSU32_DELETE_HNODE, |
678 | }; |
679 | |
680 | struct tc_cls_u32_offload { |
681 | struct tc_cls_common_offload common; |
682 | /* knode values */ |
683 | enum tc_clsu32_command command; |
684 | union { |
685 | struct tc_cls_u32_knode knode; |
686 | struct tc_cls_u32_hnode hnode; |
687 | }; |
688 | }; |
689 | |
690 | static inline bool tc_can_offload(const struct net_device *dev) |
691 | { |
692 | return dev->features & NETIF_F_HW_TC; |
693 | } |
694 | |
695 | static inline bool tc_can_offload_extack(const struct net_device *dev, |
696 | struct netlink_ext_ack *extack) |
697 | { |
698 | bool can = tc_can_offload(dev); |
699 | |
700 | if (!can) |
701 | NL_SET_ERR_MSG(extack, "TC offload is disabled on net device" ); |
702 | |
703 | return can; |
704 | } |
705 | |
706 | static inline bool |
707 | tc_cls_can_offload_and_chain0(const struct net_device *dev, |
708 | struct tc_cls_common_offload *common) |
709 | { |
710 | if (!tc_can_offload_extack(dev, common->extack)) |
711 | return false; |
712 | if (common->chain_index) { |
713 | NL_SET_ERR_MSG(common->extack, |
714 | "Driver supports only offload of chain 0" ); |
715 | return false; |
716 | } |
717 | return true; |
718 | } |
719 | |
720 | static inline bool tc_skip_hw(u32 flags) |
721 | { |
722 | return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; |
723 | } |
724 | |
725 | static inline bool tc_skip_sw(u32 flags) |
726 | { |
727 | return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; |
728 | } |
729 | |
730 | /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ |
731 | static inline bool tc_flags_valid(u32 flags) |
732 | { |
733 | if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | |
734 | TCA_CLS_FLAGS_VERBOSE)) |
735 | return false; |
736 | |
737 | flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; |
738 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) |
739 | return false; |
740 | |
741 | return true; |
742 | } |
743 | |
744 | static inline bool tc_in_hw(u32 flags) |
745 | { |
746 | return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; |
747 | } |
748 | |
749 | static inline void |
750 | tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common, |
751 | const struct tcf_proto *tp, u32 flags, |
752 | struct netlink_ext_ack *extack) |
753 | { |
754 | cls_common->chain_index = tp->chain->index; |
755 | cls_common->protocol = tp->protocol; |
756 | cls_common->prio = tp->prio; |
757 | if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) |
758 | cls_common->extack = extack; |
759 | } |
760 | |
761 | enum tc_fl_command { |
762 | TC_CLSFLOWER_REPLACE, |
763 | TC_CLSFLOWER_DESTROY, |
764 | TC_CLSFLOWER_STATS, |
765 | TC_CLSFLOWER_TMPLT_CREATE, |
766 | TC_CLSFLOWER_TMPLT_DESTROY, |
767 | }; |
768 | |
769 | struct tc_cls_flower_offload { |
770 | struct tc_cls_common_offload common; |
771 | enum tc_fl_command command; |
772 | unsigned long cookie; |
773 | struct flow_rule *rule; |
774 | struct flow_stats stats; |
775 | u32 classid; |
776 | }; |
777 | |
778 | static inline struct flow_rule * |
779 | tc_cls_flower_offload_flow_rule(struct tc_cls_flower_offload *tc_flow_cmd) |
780 | { |
781 | return tc_flow_cmd->rule; |
782 | } |
783 | |
784 | enum tc_matchall_command { |
785 | TC_CLSMATCHALL_REPLACE, |
786 | TC_CLSMATCHALL_DESTROY, |
787 | }; |
788 | |
789 | struct tc_cls_matchall_offload { |
790 | struct tc_cls_common_offload common; |
791 | enum tc_matchall_command command; |
792 | struct tcf_exts *exts; |
793 | unsigned long cookie; |
794 | }; |
795 | |
796 | enum tc_clsbpf_command { |
797 | TC_CLSBPF_OFFLOAD, |
798 | TC_CLSBPF_STATS, |
799 | }; |
800 | |
801 | struct tc_cls_bpf_offload { |
802 | struct tc_cls_common_offload common; |
803 | enum tc_clsbpf_command command; |
804 | struct tcf_exts *exts; |
805 | struct bpf_prog *prog; |
806 | struct bpf_prog *oldprog; |
807 | const char *name; |
808 | bool exts_integrated; |
809 | }; |
810 | |
811 | struct tc_mqprio_qopt_offload { |
812 | /* struct tc_mqprio_qopt must always be the first element */ |
813 | struct tc_mqprio_qopt qopt; |
814 | u16 mode; |
815 | u16 shaper; |
816 | u32 flags; |
817 | u64 min_rate[TC_QOPT_MAX_QUEUE]; |
818 | u64 max_rate[TC_QOPT_MAX_QUEUE]; |
819 | }; |
820 | |
821 | /* This structure holds cookie structure that is passed from user |
822 | * to the kernel for actions and classifiers |
823 | */ |
824 | struct tc_cookie { |
825 | u8 *data; |
826 | u32 len; |
827 | struct rcu_head rcu; |
828 | }; |
829 | |
830 | struct tc_qopt_offload_stats { |
831 | struct gnet_stats_basic_packed *bstats; |
832 | struct gnet_stats_queue *qstats; |
833 | }; |
834 | |
835 | enum tc_mq_command { |
836 | TC_MQ_CREATE, |
837 | TC_MQ_DESTROY, |
838 | TC_MQ_STATS, |
839 | TC_MQ_GRAFT, |
840 | }; |
841 | |
842 | struct tc_mq_opt_offload_graft_params { |
843 | unsigned long queue; |
844 | u32 child_handle; |
845 | }; |
846 | |
847 | struct tc_mq_qopt_offload { |
848 | enum tc_mq_command command; |
849 | u32 handle; |
850 | union { |
851 | struct tc_qopt_offload_stats stats; |
852 | struct tc_mq_opt_offload_graft_params graft_params; |
853 | }; |
854 | }; |
855 | |
856 | enum tc_red_command { |
857 | TC_RED_REPLACE, |
858 | TC_RED_DESTROY, |
859 | TC_RED_STATS, |
860 | TC_RED_XSTATS, |
861 | TC_RED_GRAFT, |
862 | }; |
863 | |
864 | struct tc_red_qopt_offload_params { |
865 | u32 min; |
866 | u32 max; |
867 | u32 probability; |
868 | u32 limit; |
869 | bool is_ecn; |
870 | bool is_harddrop; |
871 | struct gnet_stats_queue *qstats; |
872 | }; |
873 | |
874 | struct tc_red_qopt_offload { |
875 | enum tc_red_command command; |
876 | u32 handle; |
877 | u32 parent; |
878 | union { |
879 | struct tc_red_qopt_offload_params set; |
880 | struct tc_qopt_offload_stats stats; |
881 | struct red_stats *xstats; |
882 | u32 child_handle; |
883 | }; |
884 | }; |
885 | |
886 | enum tc_gred_command { |
887 | TC_GRED_REPLACE, |
888 | TC_GRED_DESTROY, |
889 | TC_GRED_STATS, |
890 | }; |
891 | |
892 | struct tc_gred_vq_qopt_offload_params { |
893 | bool present; |
894 | u32 limit; |
895 | u32 prio; |
896 | u32 min; |
897 | u32 max; |
898 | bool is_ecn; |
899 | bool is_harddrop; |
900 | u32 probability; |
901 | /* Only need backlog, see struct tc_prio_qopt_offload_params */ |
902 | u32 *backlog; |
903 | }; |
904 | |
905 | struct tc_gred_qopt_offload_params { |
906 | bool grio_on; |
907 | bool wred_on; |
908 | unsigned int dp_cnt; |
909 | unsigned int dp_def; |
910 | struct gnet_stats_queue *qstats; |
911 | struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; |
912 | }; |
913 | |
914 | struct tc_gred_qopt_offload_stats { |
915 | struct gnet_stats_basic_packed bstats[MAX_DPs]; |
916 | struct gnet_stats_queue qstats[MAX_DPs]; |
917 | struct red_stats *xstats[MAX_DPs]; |
918 | }; |
919 | |
920 | struct tc_gred_qopt_offload { |
921 | enum tc_gred_command command; |
922 | u32 handle; |
923 | u32 parent; |
924 | union { |
925 | struct tc_gred_qopt_offload_params set; |
926 | struct tc_gred_qopt_offload_stats stats; |
927 | }; |
928 | }; |
929 | |
930 | enum tc_prio_command { |
931 | TC_PRIO_REPLACE, |
932 | TC_PRIO_DESTROY, |
933 | TC_PRIO_STATS, |
934 | TC_PRIO_GRAFT, |
935 | }; |
936 | |
937 | struct tc_prio_qopt_offload_params { |
938 | int bands; |
939 | u8 priomap[TC_PRIO_MAX + 1]; |
940 | /* In case that a prio qdisc is offloaded and now is changed to a |
941 | * non-offloadedable config, it needs to update the backlog & qlen |
942 | * values to negate the HW backlog & qlen values (and only them). |
943 | */ |
944 | struct gnet_stats_queue *qstats; |
945 | }; |
946 | |
947 | struct tc_prio_qopt_offload_graft_params { |
948 | u8 band; |
949 | u32 child_handle; |
950 | }; |
951 | |
952 | struct tc_prio_qopt_offload { |
953 | enum tc_prio_command command; |
954 | u32 handle; |
955 | u32 parent; |
956 | union { |
957 | struct tc_prio_qopt_offload_params replace_params; |
958 | struct tc_qopt_offload_stats stats; |
959 | struct tc_prio_qopt_offload_graft_params graft_params; |
960 | }; |
961 | }; |
962 | |
963 | enum tc_root_command { |
964 | TC_ROOT_GRAFT, |
965 | }; |
966 | |
967 | struct tc_root_qopt_offload { |
968 | enum tc_root_command command; |
969 | u32 handle; |
970 | bool ingress; |
971 | }; |
972 | |
973 | #endif |
974 | |