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 | void 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 | int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action, |
63 | int police, struct tcf_proto *tp, u32 handle, bool used_action_miss); |
64 | |
65 | static inline bool tcf_block_shared(struct tcf_block *block) |
66 | { |
67 | return block->index; |
68 | } |
69 | |
70 | static inline bool tcf_block_non_null_shared(struct tcf_block *block) |
71 | { |
72 | return block && block->index; |
73 | } |
74 | |
75 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
76 | { |
77 | WARN_ON(tcf_block_shared(block)); |
78 | return block->q; |
79 | } |
80 | |
81 | int tcf_classify(struct sk_buff *skb, |
82 | const struct tcf_block *block, |
83 | const struct tcf_proto *tp, struct tcf_result *res, |
84 | bool compat_mode); |
85 | |
86 | static inline bool tc_cls_stats_dump(struct tcf_proto *tp, |
87 | struct tcf_walker *arg, |
88 | void *filter) |
89 | { |
90 | if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) { |
91 | arg->stop = 1; |
92 | return false; |
93 | } |
94 | |
95 | arg->count++; |
96 | return true; |
97 | } |
98 | |
99 | #else |
100 | static inline bool tcf_block_shared(struct tcf_block *block) |
101 | { |
102 | return false; |
103 | } |
104 | |
105 | static inline bool tcf_block_non_null_shared(struct tcf_block *block) |
106 | { |
107 | return false; |
108 | } |
109 | |
110 | static inline |
111 | int tcf_block_get(struct tcf_block **p_block, |
112 | struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, |
113 | struct netlink_ext_ack *extack) |
114 | { |
115 | return 0; |
116 | } |
117 | |
118 | static inline |
119 | int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, |
120 | struct tcf_block_ext_info *ei, |
121 | struct netlink_ext_ack *extack) |
122 | { |
123 | return 0; |
124 | } |
125 | |
126 | static inline void tcf_block_put(struct tcf_block *block) |
127 | { |
128 | } |
129 | |
130 | static inline |
131 | void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, |
132 | struct tcf_block_ext_info *ei) |
133 | { |
134 | } |
135 | |
136 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
137 | { |
138 | return NULL; |
139 | } |
140 | |
141 | static inline int tcf_classify(struct sk_buff *skb, |
142 | const struct tcf_block *block, |
143 | const struct tcf_proto *tp, |
144 | struct tcf_result *res, bool compat_mode) |
145 | { |
146 | return TC_ACT_UNSPEC; |
147 | } |
148 | |
149 | #endif |
150 | |
151 | static inline unsigned long |
152 | __cls_set_class(unsigned long *clp, unsigned long cl) |
153 | { |
154 | return xchg(clp, cl); |
155 | } |
156 | |
157 | static inline void tcf_set_drop_reason(struct tcf_result *res, |
158 | enum skb_drop_reason reason) |
159 | { |
160 | res->drop_reason = reason; |
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(clp: &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(clp: &r->class, cl: 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 | static inline void tc_cls_bind_class(u32 classid, unsigned long cl, |
209 | void *q, struct tcf_result *res, |
210 | unsigned long base) |
211 | { |
212 | if (res->classid == classid) { |
213 | if (cl) |
214 | __tcf_bind_filter(q, r: res, base); |
215 | else |
216 | __tcf_unbind_filter(q, r: res); |
217 | } |
218 | } |
219 | |
220 | struct tcf_exts { |
221 | #ifdef CONFIG_NET_CLS_ACT |
222 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
223 | int nr_actions; |
224 | struct tc_action **actions; |
225 | struct net *net; |
226 | netns_tracker ns_tracker; |
227 | struct tcf_exts_miss_cookie_node *miss_cookie_node; |
228 | #endif |
229 | /* Map to export classifier specific extension TLV types to the |
230 | * generic extensions API. Unsupported extensions must be set to 0. |
231 | */ |
232 | int action; |
233 | int police; |
234 | }; |
235 | |
236 | static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, |
237 | int action, int police) |
238 | { |
239 | #ifdef CONFIG_NET_CLS |
240 | return tcf_exts_init_ex(exts, net, action, police, NULL, handle: 0, used_action_miss: false); |
241 | #else |
242 | return -EOPNOTSUPP; |
243 | #endif |
244 | } |
245 | |
246 | /* Return false if the netns is being destroyed in cleanup_net(). Callers |
247 | * need to do cleanup synchronously in this case, otherwise may race with |
248 | * tc_action_net_exit(). Return true for other cases. |
249 | */ |
250 | static inline bool tcf_exts_get_net(struct tcf_exts *exts) |
251 | { |
252 | #ifdef CONFIG_NET_CLS_ACT |
253 | exts->net = maybe_get_net(net: exts->net); |
254 | if (exts->net) |
255 | netns_tracker_alloc(net: exts->net, tracker: &exts->ns_tracker, GFP_KERNEL); |
256 | return exts->net != NULL; |
257 | #else |
258 | return true; |
259 | #endif |
260 | } |
261 | |
262 | static inline void tcf_exts_put_net(struct tcf_exts *exts) |
263 | { |
264 | #ifdef CONFIG_NET_CLS_ACT |
265 | if (exts->net) |
266 | put_net_track(net: exts->net, tracker: &exts->ns_tracker); |
267 | #endif |
268 | } |
269 | |
270 | #ifdef CONFIG_NET_CLS_ACT |
271 | #define tcf_exts_for_each_action(i, a, exts) \ |
272 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) |
273 | #else |
274 | #define tcf_exts_for_each_action(i, a, exts) \ |
275 | for (; 0; (void)(i), (void)(a), (void)(exts)) |
276 | #endif |
277 | |
278 | #define tcf_act_for_each_action(i, a, actions) \ |
279 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) |
280 | |
281 | static inline bool tc_act_in_hw(struct tc_action *act) |
282 | { |
283 | return !!act->in_hw_count; |
284 | } |
285 | |
286 | static inline void |
287 | tcf_exts_hw_stats_update(const struct tcf_exts *exts, |
288 | struct flow_stats *stats, |
289 | bool use_act_stats) |
290 | { |
291 | #ifdef CONFIG_NET_CLS_ACT |
292 | int i; |
293 | |
294 | for (i = 0; i < exts->nr_actions; i++) { |
295 | struct tc_action *a = exts->actions[i]; |
296 | |
297 | if (use_act_stats || tc_act_in_hw(act: a)) { |
298 | if (!tcf_action_update_hw_stats(action: a)) |
299 | continue; |
300 | } |
301 | |
302 | preempt_disable(); |
303 | tcf_action_stats_update(a, bytes: stats->bytes, packets: stats->pkts, drops: stats->drops, |
304 | lastuse: stats->lastused, hw: true); |
305 | preempt_enable(); |
306 | |
307 | a->used_hw_stats = stats->used_hw_stats; |
308 | a->used_hw_stats_valid = stats->used_hw_stats_valid; |
309 | } |
310 | #endif |
311 | } |
312 | |
313 | /** |
314 | * tcf_exts_has_actions - check if at least one action is present |
315 | * @exts: tc filter extensions handle |
316 | * |
317 | * Returns true if at least one action is present. |
318 | */ |
319 | static inline bool tcf_exts_has_actions(struct tcf_exts *exts) |
320 | { |
321 | #ifdef CONFIG_NET_CLS_ACT |
322 | return exts->nr_actions; |
323 | #else |
324 | return false; |
325 | #endif |
326 | } |
327 | |
328 | /** |
329 | * tcf_exts_exec - execute tc filter extensions |
330 | * @skb: socket buffer |
331 | * @exts: tc filter extensions handle |
332 | * @res: desired result |
333 | * |
334 | * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, |
335 | * a negative number if the filter must be considered unmatched or |
336 | * a positive action code (TC_ACT_*) which must be returned to the |
337 | * underlying layer. |
338 | */ |
339 | static inline int |
340 | tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, |
341 | struct tcf_result *res) |
342 | { |
343 | #ifdef CONFIG_NET_CLS_ACT |
344 | return tcf_action_exec(skb, actions: exts->actions, nr_actions: exts->nr_actions, res); |
345 | #endif |
346 | return TC_ACT_OK; |
347 | } |
348 | |
349 | static inline int |
350 | tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index, |
351 | struct tcf_result *res) |
352 | { |
353 | #ifdef CONFIG_NET_CLS_ACT |
354 | return tcf_action_exec(skb, actions: exts->actions + act_index, |
355 | nr_actions: exts->nr_actions - act_index, res); |
356 | #else |
357 | return TC_ACT_OK; |
358 | #endif |
359 | } |
360 | |
361 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, |
362 | struct nlattr **tb, struct nlattr *rate_tlv, |
363 | struct tcf_exts *exts, u32 flags, |
364 | struct netlink_ext_ack *extack); |
365 | int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, |
366 | struct nlattr *rate_tlv, struct tcf_exts *exts, |
367 | u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); |
368 | void tcf_exts_destroy(struct tcf_exts *exts); |
369 | void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); |
370 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); |
371 | int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); |
372 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); |
373 | |
374 | /** |
375 | * struct tcf_pkt_info - packet information |
376 | * |
377 | * @ptr: start of the pkt data |
378 | * @nexthdr: offset of the next header |
379 | */ |
380 | struct tcf_pkt_info { |
381 | unsigned char * ptr; |
382 | int nexthdr; |
383 | }; |
384 | |
385 | #ifdef CONFIG_NET_EMATCH |
386 | |
387 | struct tcf_ematch_ops; |
388 | |
389 | /** |
390 | * struct tcf_ematch - extended match (ematch) |
391 | * |
392 | * @matchid: identifier to allow userspace to reidentify a match |
393 | * @flags: flags specifying attributes and the relation to other matches |
394 | * @ops: the operations lookup table of the corresponding ematch module |
395 | * @datalen: length of the ematch specific configuration data |
396 | * @data: ematch specific data |
397 | * @net: the network namespace |
398 | */ |
399 | struct tcf_ematch { |
400 | struct tcf_ematch_ops * ops; |
401 | unsigned long data; |
402 | unsigned int datalen; |
403 | u16 matchid; |
404 | u16 flags; |
405 | struct net *net; |
406 | }; |
407 | |
408 | static inline int tcf_em_is_container(struct tcf_ematch *em) |
409 | { |
410 | return !em->ops; |
411 | } |
412 | |
413 | static inline int tcf_em_is_simple(struct tcf_ematch *em) |
414 | { |
415 | return em->flags & TCF_EM_SIMPLE; |
416 | } |
417 | |
418 | static inline int tcf_em_is_inverted(struct tcf_ematch *em) |
419 | { |
420 | return em->flags & TCF_EM_INVERT; |
421 | } |
422 | |
423 | static inline int tcf_em_last_match(struct tcf_ematch *em) |
424 | { |
425 | return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; |
426 | } |
427 | |
428 | static inline int tcf_em_early_end(struct tcf_ematch *em, int result) |
429 | { |
430 | if (tcf_em_last_match(em)) |
431 | return 1; |
432 | |
433 | if (result == 0 && em->flags & TCF_EM_REL_AND) |
434 | return 1; |
435 | |
436 | if (result != 0 && em->flags & TCF_EM_REL_OR) |
437 | return 1; |
438 | |
439 | return 0; |
440 | } |
441 | |
442 | /** |
443 | * struct tcf_ematch_tree - ematch tree handle |
444 | * |
445 | * @hdr: ematch tree header supplied by userspace |
446 | * @matches: array of ematches |
447 | */ |
448 | struct tcf_ematch_tree { |
449 | struct tcf_ematch_tree_hdr hdr; |
450 | struct tcf_ematch * matches; |
451 | |
452 | }; |
453 | |
454 | /** |
455 | * struct tcf_ematch_ops - ematch module operations |
456 | * |
457 | * @kind: identifier (kind) of this ematch module |
458 | * @datalen: length of expected configuration data (optional) |
459 | * @change: called during validation (optional) |
460 | * @match: called during ematch tree evaluation, must return 1/0 |
461 | * @destroy: called during destroyage (optional) |
462 | * @dump: called during dumping process (optional) |
463 | * @owner: owner, must be set to THIS_MODULE |
464 | * @link: link to previous/next ematch module (internal use) |
465 | */ |
466 | struct tcf_ematch_ops { |
467 | int kind; |
468 | int datalen; |
469 | int (*change)(struct net *net, void *, |
470 | int, struct tcf_ematch *); |
471 | int (*match)(struct sk_buff *, struct tcf_ematch *, |
472 | struct tcf_pkt_info *); |
473 | void (*destroy)(struct tcf_ematch *); |
474 | int (*dump)(struct sk_buff *, struct tcf_ematch *); |
475 | struct module *owner; |
476 | struct list_head link; |
477 | }; |
478 | |
479 | int tcf_em_register(struct tcf_ematch_ops *); |
480 | void tcf_em_unregister(struct tcf_ematch_ops *); |
481 | int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, |
482 | struct tcf_ematch_tree *); |
483 | void tcf_em_tree_destroy(struct tcf_ematch_tree *); |
484 | int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); |
485 | int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, |
486 | struct tcf_pkt_info *); |
487 | |
488 | /** |
489 | * tcf_em_tree_match - evaulate an ematch tree |
490 | * |
491 | * @skb: socket buffer of the packet in question |
492 | * @tree: ematch tree to be used for evaluation |
493 | * @info: packet information examined by classifier |
494 | * |
495 | * This function matches @skb against the ematch tree in @tree by going |
496 | * through all ematches respecting their logic relations returning |
497 | * as soon as the result is obvious. |
498 | * |
499 | * Returns 1 if the ematch tree as-one matches, no ematches are configured |
500 | * or ematch is not enabled in the kernel, otherwise 0 is returned. |
501 | */ |
502 | static inline int tcf_em_tree_match(struct sk_buff *skb, |
503 | struct tcf_ematch_tree *tree, |
504 | struct tcf_pkt_info *info) |
505 | { |
506 | if (tree->hdr.nmatches) |
507 | return __tcf_em_tree_match(skb, tree, info); |
508 | else |
509 | return 1; |
510 | } |
511 | |
512 | #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) |
513 | |
514 | #else /* CONFIG_NET_EMATCH */ |
515 | |
516 | struct tcf_ematch_tree { |
517 | }; |
518 | |
519 | #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) |
520 | #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) |
521 | #define tcf_em_tree_dump(skb, t, tlv) (0) |
522 | #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) |
523 | |
524 | #endif /* CONFIG_NET_EMATCH */ |
525 | |
526 | static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) |
527 | { |
528 | switch (layer) { |
529 | case TCF_LAYER_LINK: |
530 | return skb_mac_header(skb); |
531 | case TCF_LAYER_NETWORK: |
532 | return skb_network_header(skb); |
533 | case TCF_LAYER_TRANSPORT: |
534 | return skb_transport_header(skb); |
535 | } |
536 | |
537 | return NULL; |
538 | } |
539 | |
540 | static inline int tcf_valid_offset(const struct sk_buff *skb, |
541 | const unsigned char *ptr, const int len) |
542 | { |
543 | return likely((ptr + len) <= skb_tail_pointer(skb) && |
544 | ptr >= skb->head && |
545 | (ptr <= (ptr + len))); |
546 | } |
547 | |
548 | static inline int |
549 | tcf_change_indev(struct net *net, struct nlattr *indev_tlv, |
550 | struct netlink_ext_ack *extack) |
551 | { |
552 | char indev[IFNAMSIZ]; |
553 | struct net_device *dev; |
554 | |
555 | if (nla_strscpy(dst: indev, nla: indev_tlv, IFNAMSIZ) < 0) { |
556 | NL_SET_ERR_MSG_ATTR(extack, indev_tlv, |
557 | "Interface name too long" ); |
558 | return -EINVAL; |
559 | } |
560 | dev = __dev_get_by_name(net, name: indev); |
561 | if (!dev) { |
562 | NL_SET_ERR_MSG_ATTR(extack, indev_tlv, |
563 | "Network device not found" ); |
564 | return -ENODEV; |
565 | } |
566 | return dev->ifindex; |
567 | } |
568 | |
569 | static inline bool |
570 | tcf_match_indev(struct sk_buff *skb, int ifindex) |
571 | { |
572 | if (!ifindex) |
573 | return true; |
574 | if (!skb->skb_iif) |
575 | return false; |
576 | return ifindex == skb->skb_iif; |
577 | } |
578 | |
579 | int tc_setup_offload_action(struct flow_action *flow_action, |
580 | const struct tcf_exts *exts, |
581 | struct netlink_ext_ack *extack); |
582 | void tc_cleanup_offload_action(struct flow_action *flow_action); |
583 | int tc_setup_action(struct flow_action *flow_action, |
584 | struct tc_action *actions[], |
585 | u32 miss_cookie_base, |
586 | struct netlink_ext_ack *extack); |
587 | |
588 | int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, |
589 | void *type_data, bool err_stop, bool rtnl_held); |
590 | int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, |
591 | enum tc_setup_type type, void *type_data, bool err_stop, |
592 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
593 | int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, |
594 | enum tc_setup_type type, void *type_data, bool err_stop, |
595 | u32 *old_flags, unsigned int *old_in_hw_count, |
596 | u32 *new_flags, unsigned int *new_in_hw_count, |
597 | bool rtnl_held); |
598 | int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, |
599 | enum tc_setup_type type, void *type_data, bool err_stop, |
600 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
601 | int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, |
602 | bool add, flow_setup_cb_t *cb, |
603 | enum tc_setup_type type, void *type_data, |
604 | void *cb_priv, u32 *flags, unsigned int *in_hw_count); |
605 | unsigned int tcf_exts_num_actions(struct tcf_exts *exts); |
606 | |
607 | #ifdef CONFIG_NET_CLS_ACT |
608 | int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, |
609 | enum flow_block_binder_type binder_type, |
610 | struct nlattr *block_index_attr, |
611 | struct netlink_ext_ack *extack); |
612 | void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); |
613 | int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, |
614 | struct netlink_ext_ack *extack); |
615 | struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, |
616 | struct sk_buff **to_free, int *ret); |
617 | int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); |
618 | #else |
619 | static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, |
620 | enum flow_block_binder_type binder_type, |
621 | struct nlattr *block_index_attr, |
622 | struct netlink_ext_ack *extack) |
623 | { |
624 | return 0; |
625 | } |
626 | |
627 | static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) |
628 | { |
629 | } |
630 | |
631 | static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, |
632 | struct netlink_ext_ack *extack) |
633 | { |
634 | return 0; |
635 | } |
636 | |
637 | static inline struct sk_buff * |
638 | tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, |
639 | struct sk_buff **to_free, int *ret) |
640 | { |
641 | return skb; |
642 | } |
643 | |
644 | static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) |
645 | { |
646 | return 0; |
647 | } |
648 | #endif |
649 | |
650 | struct tc_cls_u32_knode { |
651 | struct tcf_exts *exts; |
652 | struct tcf_result *res; |
653 | struct tc_u32_sel *sel; |
654 | u32 handle; |
655 | u32 val; |
656 | u32 mask; |
657 | u32 link_handle; |
658 | u8 fshift; |
659 | }; |
660 | |
661 | struct tc_cls_u32_hnode { |
662 | u32 handle; |
663 | u32 prio; |
664 | unsigned int divisor; |
665 | }; |
666 | |
667 | enum tc_clsu32_command { |
668 | TC_CLSU32_NEW_KNODE, |
669 | TC_CLSU32_REPLACE_KNODE, |
670 | TC_CLSU32_DELETE_KNODE, |
671 | TC_CLSU32_NEW_HNODE, |
672 | TC_CLSU32_REPLACE_HNODE, |
673 | TC_CLSU32_DELETE_HNODE, |
674 | }; |
675 | |
676 | struct tc_cls_u32_offload { |
677 | struct flow_cls_common_offload common; |
678 | /* knode values */ |
679 | enum tc_clsu32_command command; |
680 | union { |
681 | struct tc_cls_u32_knode knode; |
682 | struct tc_cls_u32_hnode hnode; |
683 | }; |
684 | }; |
685 | |
686 | static inline bool tc_can_offload(const struct net_device *dev) |
687 | { |
688 | return dev->features & NETIF_F_HW_TC; |
689 | } |
690 | |
691 | static inline bool tc_can_offload_extack(const struct net_device *dev, |
692 | struct netlink_ext_ack *extack) |
693 | { |
694 | bool can = tc_can_offload(dev); |
695 | |
696 | if (!can) |
697 | NL_SET_ERR_MSG(extack, "TC offload is disabled on net device" ); |
698 | |
699 | return can; |
700 | } |
701 | |
702 | static inline bool |
703 | tc_cls_can_offload_and_chain0(const struct net_device *dev, |
704 | struct flow_cls_common_offload *common) |
705 | { |
706 | if (!tc_can_offload_extack(dev, extack: common->extack)) |
707 | return false; |
708 | if (common->chain_index) { |
709 | NL_SET_ERR_MSG(common->extack, |
710 | "Driver supports only offload of chain 0" ); |
711 | return false; |
712 | } |
713 | return true; |
714 | } |
715 | |
716 | static inline bool tc_skip_hw(u32 flags) |
717 | { |
718 | return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; |
719 | } |
720 | |
721 | static inline bool tc_skip_sw(u32 flags) |
722 | { |
723 | return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; |
724 | } |
725 | |
726 | /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ |
727 | static inline bool tc_flags_valid(u32 flags) |
728 | { |
729 | if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | |
730 | TCA_CLS_FLAGS_VERBOSE)) |
731 | return false; |
732 | |
733 | flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; |
734 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) |
735 | return false; |
736 | |
737 | return true; |
738 | } |
739 | |
740 | static inline bool tc_in_hw(u32 flags) |
741 | { |
742 | return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; |
743 | } |
744 | |
745 | static inline void |
746 | tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, |
747 | const struct tcf_proto *tp, u32 flags, |
748 | struct netlink_ext_ack *extack) |
749 | { |
750 | cls_common->chain_index = tp->chain->index; |
751 | cls_common->protocol = tp->protocol; |
752 | cls_common->prio = tp->prio >> 16; |
753 | if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) |
754 | cls_common->extack = extack; |
755 | } |
756 | |
757 | #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) |
758 | static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) |
759 | { |
760 | struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, id: TC_SKB_EXT); |
761 | |
762 | if (tc_skb_ext) |
763 | memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); |
764 | return tc_skb_ext; |
765 | } |
766 | #endif |
767 | |
768 | enum tc_matchall_command { |
769 | TC_CLSMATCHALL_REPLACE, |
770 | TC_CLSMATCHALL_DESTROY, |
771 | TC_CLSMATCHALL_STATS, |
772 | }; |
773 | |
774 | struct tc_cls_matchall_offload { |
775 | struct flow_cls_common_offload common; |
776 | enum tc_matchall_command command; |
777 | struct flow_rule *rule; |
778 | struct flow_stats stats; |
779 | bool use_act_stats; |
780 | unsigned long cookie; |
781 | }; |
782 | |
783 | enum tc_clsbpf_command { |
784 | TC_CLSBPF_OFFLOAD, |
785 | TC_CLSBPF_STATS, |
786 | }; |
787 | |
788 | struct tc_cls_bpf_offload { |
789 | struct flow_cls_common_offload common; |
790 | enum tc_clsbpf_command command; |
791 | struct tcf_exts *exts; |
792 | struct bpf_prog *prog; |
793 | struct bpf_prog *oldprog; |
794 | const char *name; |
795 | bool exts_integrated; |
796 | }; |
797 | |
798 | /* This structure holds cookie structure that is passed from user |
799 | * to the kernel for actions and classifiers |
800 | */ |
801 | struct tc_cookie { |
802 | u8 *data; |
803 | u32 len; |
804 | struct rcu_head rcu; |
805 | }; |
806 | |
807 | struct tc_qopt_offload_stats { |
808 | struct gnet_stats_basic_sync *bstats; |
809 | struct gnet_stats_queue *qstats; |
810 | }; |
811 | |
812 | enum tc_mq_command { |
813 | TC_MQ_CREATE, |
814 | TC_MQ_DESTROY, |
815 | TC_MQ_STATS, |
816 | TC_MQ_GRAFT, |
817 | }; |
818 | |
819 | struct tc_mq_opt_offload_graft_params { |
820 | unsigned long queue; |
821 | u32 child_handle; |
822 | }; |
823 | |
824 | struct tc_mq_qopt_offload { |
825 | enum tc_mq_command command; |
826 | u32 handle; |
827 | union { |
828 | struct tc_qopt_offload_stats stats; |
829 | struct tc_mq_opt_offload_graft_params graft_params; |
830 | }; |
831 | }; |
832 | |
833 | enum tc_htb_command { |
834 | /* Root */ |
835 | TC_HTB_CREATE, /* Initialize HTB offload. */ |
836 | TC_HTB_DESTROY, /* Destroy HTB offload. */ |
837 | |
838 | /* Classes */ |
839 | /* Allocate qid and create leaf. */ |
840 | TC_HTB_LEAF_ALLOC_QUEUE, |
841 | /* Convert leaf to inner, preserve and return qid, create new leaf. */ |
842 | TC_HTB_LEAF_TO_INNER, |
843 | /* Delete leaf, while siblings remain. */ |
844 | TC_HTB_LEAF_DEL, |
845 | /* Delete leaf, convert parent to leaf, preserving qid. */ |
846 | TC_HTB_LEAF_DEL_LAST, |
847 | /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ |
848 | TC_HTB_LEAF_DEL_LAST_FORCE, |
849 | /* Modify parameters of a node. */ |
850 | TC_HTB_NODE_MODIFY, |
851 | |
852 | /* Class qdisc */ |
853 | TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ |
854 | }; |
855 | |
856 | struct tc_htb_qopt_offload { |
857 | struct netlink_ext_ack *extack; |
858 | enum tc_htb_command command; |
859 | u32 parent_classid; |
860 | u16 classid; |
861 | u16 qid; |
862 | u32 quantum; |
863 | u64 rate; |
864 | u64 ceil; |
865 | u8 prio; |
866 | }; |
867 | |
868 | #define TC_HTB_CLASSID_ROOT U32_MAX |
869 | |
870 | enum tc_red_command { |
871 | TC_RED_REPLACE, |
872 | TC_RED_DESTROY, |
873 | TC_RED_STATS, |
874 | TC_RED_XSTATS, |
875 | TC_RED_GRAFT, |
876 | }; |
877 | |
878 | struct tc_red_qopt_offload_params { |
879 | u32 min; |
880 | u32 max; |
881 | u32 probability; |
882 | u32 limit; |
883 | bool is_ecn; |
884 | bool is_harddrop; |
885 | bool is_nodrop; |
886 | struct gnet_stats_queue *qstats; |
887 | }; |
888 | |
889 | struct tc_red_qopt_offload { |
890 | enum tc_red_command command; |
891 | u32 handle; |
892 | u32 parent; |
893 | union { |
894 | struct tc_red_qopt_offload_params set; |
895 | struct tc_qopt_offload_stats stats; |
896 | struct red_stats *xstats; |
897 | u32 child_handle; |
898 | }; |
899 | }; |
900 | |
901 | enum tc_gred_command { |
902 | TC_GRED_REPLACE, |
903 | TC_GRED_DESTROY, |
904 | TC_GRED_STATS, |
905 | }; |
906 | |
907 | struct tc_gred_vq_qopt_offload_params { |
908 | bool present; |
909 | u32 limit; |
910 | u32 prio; |
911 | u32 min; |
912 | u32 max; |
913 | bool is_ecn; |
914 | bool is_harddrop; |
915 | u32 probability; |
916 | /* Only need backlog, see struct tc_prio_qopt_offload_params */ |
917 | u32 *backlog; |
918 | }; |
919 | |
920 | struct tc_gred_qopt_offload_params { |
921 | bool grio_on; |
922 | bool wred_on; |
923 | unsigned int dp_cnt; |
924 | unsigned int dp_def; |
925 | struct gnet_stats_queue *qstats; |
926 | struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; |
927 | }; |
928 | |
929 | struct tc_gred_qopt_offload_stats { |
930 | struct gnet_stats_basic_sync bstats[MAX_DPs]; |
931 | struct gnet_stats_queue qstats[MAX_DPs]; |
932 | struct red_stats *xstats[MAX_DPs]; |
933 | }; |
934 | |
935 | struct tc_gred_qopt_offload { |
936 | enum tc_gred_command command; |
937 | u32 handle; |
938 | u32 parent; |
939 | union { |
940 | struct tc_gred_qopt_offload_params set; |
941 | struct tc_gred_qopt_offload_stats stats; |
942 | }; |
943 | }; |
944 | |
945 | enum tc_prio_command { |
946 | TC_PRIO_REPLACE, |
947 | TC_PRIO_DESTROY, |
948 | TC_PRIO_STATS, |
949 | TC_PRIO_GRAFT, |
950 | }; |
951 | |
952 | struct tc_prio_qopt_offload_params { |
953 | int bands; |
954 | u8 priomap[TC_PRIO_MAX + 1]; |
955 | /* At the point of un-offloading the Qdisc, the reported backlog and |
956 | * qlen need to be reduced by the portion that is in HW. |
957 | */ |
958 | struct gnet_stats_queue *qstats; |
959 | }; |
960 | |
961 | struct tc_prio_qopt_offload_graft_params { |
962 | u8 band; |
963 | u32 child_handle; |
964 | }; |
965 | |
966 | struct tc_prio_qopt_offload { |
967 | enum tc_prio_command command; |
968 | u32 handle; |
969 | u32 parent; |
970 | union { |
971 | struct tc_prio_qopt_offload_params replace_params; |
972 | struct tc_qopt_offload_stats stats; |
973 | struct tc_prio_qopt_offload_graft_params graft_params; |
974 | }; |
975 | }; |
976 | |
977 | enum tc_root_command { |
978 | TC_ROOT_GRAFT, |
979 | }; |
980 | |
981 | struct tc_root_qopt_offload { |
982 | enum tc_root_command command; |
983 | u32 handle; |
984 | bool ingress; |
985 | }; |
986 | |
987 | enum tc_ets_command { |
988 | TC_ETS_REPLACE, |
989 | TC_ETS_DESTROY, |
990 | TC_ETS_STATS, |
991 | TC_ETS_GRAFT, |
992 | }; |
993 | |
994 | struct tc_ets_qopt_offload_replace_params { |
995 | unsigned int bands; |
996 | u8 priomap[TC_PRIO_MAX + 1]; |
997 | unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ |
998 | unsigned int weights[TCQ_ETS_MAX_BANDS]; |
999 | struct gnet_stats_queue *qstats; |
1000 | }; |
1001 | |
1002 | struct tc_ets_qopt_offload_graft_params { |
1003 | u8 band; |
1004 | u32 child_handle; |
1005 | }; |
1006 | |
1007 | struct tc_ets_qopt_offload { |
1008 | enum tc_ets_command command; |
1009 | u32 handle; |
1010 | u32 parent; |
1011 | union { |
1012 | struct tc_ets_qopt_offload_replace_params replace_params; |
1013 | struct tc_qopt_offload_stats stats; |
1014 | struct tc_ets_qopt_offload_graft_params graft_params; |
1015 | }; |
1016 | }; |
1017 | |
1018 | enum tc_tbf_command { |
1019 | TC_TBF_REPLACE, |
1020 | TC_TBF_DESTROY, |
1021 | TC_TBF_STATS, |
1022 | TC_TBF_GRAFT, |
1023 | }; |
1024 | |
1025 | struct tc_tbf_qopt_offload_replace_params { |
1026 | struct psched_ratecfg rate; |
1027 | u32 max_size; |
1028 | struct gnet_stats_queue *qstats; |
1029 | }; |
1030 | |
1031 | struct tc_tbf_qopt_offload { |
1032 | enum tc_tbf_command command; |
1033 | u32 handle; |
1034 | u32 parent; |
1035 | union { |
1036 | struct tc_tbf_qopt_offload_replace_params replace_params; |
1037 | struct tc_qopt_offload_stats stats; |
1038 | u32 child_handle; |
1039 | }; |
1040 | }; |
1041 | |
1042 | enum tc_fifo_command { |
1043 | TC_FIFO_REPLACE, |
1044 | TC_FIFO_DESTROY, |
1045 | TC_FIFO_STATS, |
1046 | }; |
1047 | |
1048 | struct tc_fifo_qopt_offload { |
1049 | enum tc_fifo_command command; |
1050 | u32 handle; |
1051 | u32 parent; |
1052 | union { |
1053 | struct tc_qopt_offload_stats stats; |
1054 | }; |
1055 | }; |
1056 | |
1057 | #ifdef CONFIG_NET_CLS_ACT |
1058 | DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); |
1059 | void tc_skb_ext_tc_enable(void); |
1060 | void tc_skb_ext_tc_disable(void); |
1061 | #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) |
1062 | #else /* CONFIG_NET_CLS_ACT */ |
1063 | static inline void tc_skb_ext_tc_enable(void) { } |
1064 | static inline void tc_skb_ext_tc_disable(void) { } |
1065 | #define tc_skb_ext_tc_enabled() false |
1066 | #endif |
1067 | |
1068 | #endif |
1069 | |