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 | |
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, |
80 | const struct tcf_block *block, |
81 | const struct tcf_proto *tp, struct tcf_result *res, |
82 | bool compat_mode); |
83 | |
84 | #else |
85 | static inline bool tcf_block_shared(struct tcf_block *block) |
86 | { |
87 | return false; |
88 | } |
89 | |
90 | static inline bool tcf_block_non_null_shared(struct tcf_block *block) |
91 | { |
92 | return false; |
93 | } |
94 | |
95 | static inline |
96 | int tcf_block_get(struct tcf_block **p_block, |
97 | struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, |
98 | struct netlink_ext_ack *extack) |
99 | { |
100 | return 0; |
101 | } |
102 | |
103 | static inline |
104 | int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, |
105 | struct tcf_block_ext_info *ei, |
106 | struct netlink_ext_ack *extack) |
107 | { |
108 | return 0; |
109 | } |
110 | |
111 | static inline void tcf_block_put(struct tcf_block *block) |
112 | { |
113 | } |
114 | |
115 | static inline |
116 | void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, |
117 | struct tcf_block_ext_info *ei) |
118 | { |
119 | } |
120 | |
121 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
122 | { |
123 | return NULL; |
124 | } |
125 | |
126 | static inline |
127 | int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb, |
128 | void *cb_priv) |
129 | { |
130 | return 0; |
131 | } |
132 | |
133 | static inline |
134 | void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb, |
135 | void *cb_priv) |
136 | { |
137 | } |
138 | |
139 | static inline int tcf_classify(struct sk_buff *skb, |
140 | const struct tcf_block *block, |
141 | const struct tcf_proto *tp, |
142 | struct tcf_result *res, bool compat_mode) |
143 | { |
144 | return TC_ACT_UNSPEC; |
145 | } |
146 | |
147 | #endif |
148 | |
149 | static inline unsigned long |
150 | __cls_set_class(unsigned long *clp, unsigned long cl) |
151 | { |
152 | return xchg(clp, cl); |
153 | } |
154 | |
155 | static inline void |
156 | __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) |
157 | { |
158 | unsigned long cl; |
159 | |
160 | cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); |
161 | cl = __cls_set_class(&r->class, cl); |
162 | if (cl) |
163 | q->ops->cl_ops->unbind_tcf(q, cl); |
164 | } |
165 | |
166 | static inline void |
167 | tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) |
168 | { |
169 | struct Qdisc *q = tp->chain->block->q; |
170 | |
171 | /* Check q as it is not set for shared blocks. In that case, |
172 | * setting class is not supported. |
173 | */ |
174 | if (!q) |
175 | return; |
176 | sch_tree_lock(q); |
177 | __tcf_bind_filter(q, r, base); |
178 | sch_tree_unlock(q); |
179 | } |
180 | |
181 | static inline void |
182 | __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) |
183 | { |
184 | unsigned long cl; |
185 | |
186 | if ((cl = __cls_set_class(&r->class, 0)) != 0) |
187 | q->ops->cl_ops->unbind_tcf(q, cl); |
188 | } |
189 | |
190 | static inline void |
191 | tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) |
192 | { |
193 | struct Qdisc *q = tp->chain->block->q; |
194 | |
195 | if (!q) |
196 | return; |
197 | __tcf_unbind_filter(q, r); |
198 | } |
199 | |
200 | struct tcf_exts { |
201 | #ifdef CONFIG_NET_CLS_ACT |
202 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
203 | int nr_actions; |
204 | struct tc_action **actions; |
205 | struct net *net; |
206 | netns_tracker ns_tracker; |
207 | #endif |
208 | /* Map to export classifier specific extension TLV types to the |
209 | * generic extensions API. Unsupported extensions must be set to 0. |
210 | */ |
211 | int action; |
212 | int police; |
213 | }; |
214 | |
215 | static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, |
216 | int action, int police) |
217 | { |
218 | #ifdef CONFIG_NET_CLS_ACT |
219 | exts->type = 0; |
220 | exts->nr_actions = 0; |
221 | /* Note: we do not own yet a reference on net. |
222 | * This reference might be taken later from tcf_exts_get_net(). |
223 | */ |
224 | exts->net = net; |
225 | exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), |
226 | GFP_KERNEL); |
227 | if (!exts->actions) |
228 | return -ENOMEM; |
229 | #endif |
230 | exts->action = action; |
231 | exts->police = police; |
232 | return 0; |
233 | } |
234 | |
235 | /* Return false if the netns is being destroyed in cleanup_net(). Callers |
236 | * need to do cleanup synchronously in this case, otherwise may race with |
237 | * tc_action_net_exit(). Return true for other cases. |
238 | */ |
239 | static inline bool tcf_exts_get_net(struct tcf_exts *exts) |
240 | { |
241 | #ifdef CONFIG_NET_CLS_ACT |
242 | exts->net = maybe_get_net(exts->net); |
243 | if (exts->net) |
244 | netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); |
245 | return exts->net != NULL; |
246 | #else |
247 | return true; |
248 | #endif |
249 | } |
250 | |
251 | static inline void tcf_exts_put_net(struct tcf_exts *exts) |
252 | { |
253 | #ifdef CONFIG_NET_CLS_ACT |
254 | if (exts->net) |
255 | put_net_track(exts->net, &exts->ns_tracker); |
256 | #endif |
257 | } |
258 | |
259 | #ifdef CONFIG_NET_CLS_ACT |
260 | #define tcf_exts_for_each_action(i, a, exts) \ |
261 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) |
262 | #else |
263 | #define tcf_exts_for_each_action(i, a, exts) \ |
264 | for (; 0; (void)(i), (void)(a), (void)(exts)) |
265 | #endif |
266 | |
267 | #define tcf_act_for_each_action(i, a, actions) \ |
268 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) |
269 | |
270 | static inline void |
271 | tcf_exts_hw_stats_update(const struct tcf_exts *exts, |
272 | u64 bytes, u64 packets, u64 drops, u64 lastuse, |
273 | u8 used_hw_stats, bool used_hw_stats_valid) |
274 | { |
275 | #ifdef CONFIG_NET_CLS_ACT |
276 | int i; |
277 | |
278 | for (i = 0; i < exts->nr_actions; i++) { |
279 | struct tc_action *a = exts->actions[i]; |
280 | |
281 | /* if stats from hw, just skip */ |
282 | if (tcf_action_update_hw_stats(a)) { |
283 | preempt_disable(); |
284 | tcf_action_stats_update(a, bytes, packets, drops, |
285 | lastuse, true); |
286 | preempt_enable(); |
287 | |
288 | a->used_hw_stats = used_hw_stats; |
289 | a->used_hw_stats_valid = used_hw_stats_valid; |
290 | } |
291 | } |
292 | #endif |
293 | } |
294 | |
295 | /** |
296 | * tcf_exts_has_actions - check if at least one action is present |
297 | * @exts: tc filter extensions handle |
298 | * |
299 | * Returns true if at least one action is present. |
300 | */ |
301 | static inline bool tcf_exts_has_actions(struct tcf_exts *exts) |
302 | { |
303 | #ifdef CONFIG_NET_CLS_ACT |
304 | return exts->nr_actions; |
305 | #else |
306 | return false; |
307 | #endif |
308 | } |
309 | |
310 | /** |
311 | * tcf_exts_exec - execute tc filter extensions |
312 | * @skb: socket buffer |
313 | * @exts: tc filter extensions handle |
314 | * @res: desired result |
315 | * |
316 | * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, |
317 | * a negative number if the filter must be considered unmatched or |
318 | * a positive action code (TC_ACT_*) which must be returned to the |
319 | * underlying layer. |
320 | */ |
321 | static inline int |
322 | tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, |
323 | struct tcf_result *res) |
324 | { |
325 | #ifdef CONFIG_NET_CLS_ACT |
326 | return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); |
327 | #endif |
328 | return TC_ACT_OK; |
329 | } |
330 | |
331 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, |
332 | struct nlattr **tb, struct nlattr *rate_tlv, |
333 | struct tcf_exts *exts, u32 flags, |
334 | struct netlink_ext_ack *extack); |
335 | int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, |
336 | struct nlattr *rate_tlv, struct tcf_exts *exts, |
337 | u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); |
338 | void tcf_exts_destroy(struct tcf_exts *exts); |
339 | void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); |
340 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); |
341 | int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); |
342 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); |
343 | |
344 | /** |
345 | * struct tcf_pkt_info - packet information |
346 | * |
347 | * @ptr: start of the pkt data |
348 | * @nexthdr: offset of the next header |
349 | */ |
350 | struct tcf_pkt_info { |
351 | unsigned char * ptr; |
352 | int nexthdr; |
353 | }; |
354 | |
355 | #ifdef CONFIG_NET_EMATCH |
356 | |
357 | struct tcf_ematch_ops; |
358 | |
359 | /** |
360 | * struct tcf_ematch - extended match (ematch) |
361 | * |
362 | * @matchid: identifier to allow userspace to reidentify a match |
363 | * @flags: flags specifying attributes and the relation to other matches |
364 | * @ops: the operations lookup table of the corresponding ematch module |
365 | * @datalen: length of the ematch specific configuration data |
366 | * @data: ematch specific data |
367 | * @net: the network namespace |
368 | */ |
369 | struct tcf_ematch { |
370 | struct tcf_ematch_ops * ops; |
371 | unsigned long data; |
372 | unsigned int datalen; |
373 | u16 matchid; |
374 | u16 flags; |
375 | struct net *net; |
376 | }; |
377 | |
378 | static inline int tcf_em_is_container(struct tcf_ematch *em) |
379 | { |
380 | return !em->ops; |
381 | } |
382 | |
383 | static inline int tcf_em_is_simple(struct tcf_ematch *em) |
384 | { |
385 | return em->flags & TCF_EM_SIMPLE; |
386 | } |
387 | |
388 | static inline int tcf_em_is_inverted(struct tcf_ematch *em) |
389 | { |
390 | return em->flags & TCF_EM_INVERT; |
391 | } |
392 | |
393 | static inline int tcf_em_last_match(struct tcf_ematch *em) |
394 | { |
395 | return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; |
396 | } |
397 | |
398 | static inline int tcf_em_early_end(struct tcf_ematch *em, int result) |
399 | { |
400 | if (tcf_em_last_match(em)) |
401 | return 1; |
402 | |
403 | if (result == 0 && em->flags & TCF_EM_REL_AND) |
404 | return 1; |
405 | |
406 | if (result != 0 && em->flags & TCF_EM_REL_OR) |
407 | return 1; |
408 | |
409 | return 0; |
410 | } |
411 | |
412 | /** |
413 | * struct tcf_ematch_tree - ematch tree handle |
414 | * |
415 | * @hdr: ematch tree header supplied by userspace |
416 | * @matches: array of ematches |
417 | */ |
418 | struct tcf_ematch_tree { |
419 | struct tcf_ematch_tree_hdr hdr; |
420 | struct tcf_ematch * matches; |
421 | |
422 | }; |
423 | |
424 | /** |
425 | * struct tcf_ematch_ops - ematch module operations |
426 | * |
427 | * @kind: identifier (kind) of this ematch module |
428 | * @datalen: length of expected configuration data (optional) |
429 | * @change: called during validation (optional) |
430 | * @match: called during ematch tree evaluation, must return 1/0 |
431 | * @destroy: called during destroyage (optional) |
432 | * @dump: called during dumping process (optional) |
433 | * @owner: owner, must be set to THIS_MODULE |
434 | * @link: link to previous/next ematch module (internal use) |
435 | */ |
436 | struct tcf_ematch_ops { |
437 | int kind; |
438 | int datalen; |
439 | int (*change)(struct net *net, void *, |
440 | int, struct tcf_ematch *); |
441 | int (*match)(struct sk_buff *, struct tcf_ematch *, |
442 | struct tcf_pkt_info *); |
443 | void (*destroy)(struct tcf_ematch *); |
444 | int (*dump)(struct sk_buff *, struct tcf_ematch *); |
445 | struct module *owner; |
446 | struct list_head link; |
447 | }; |
448 | |
449 | int tcf_em_register(struct tcf_ematch_ops *); |
450 | void tcf_em_unregister(struct tcf_ematch_ops *); |
451 | int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, |
452 | struct tcf_ematch_tree *); |
453 | void tcf_em_tree_destroy(struct tcf_ematch_tree *); |
454 | int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); |
455 | int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, |
456 | struct tcf_pkt_info *); |
457 | |
458 | /** |
459 | * tcf_em_tree_match - evaulate an ematch tree |
460 | * |
461 | * @skb: socket buffer of the packet in question |
462 | * @tree: ematch tree to be used for evaluation |
463 | * @info: packet information examined by classifier |
464 | * |
465 | * This function matches @skb against the ematch tree in @tree by going |
466 | * through all ematches respecting their logic relations returning |
467 | * as soon as the result is obvious. |
468 | * |
469 | * Returns 1 if the ematch tree as-one matches, no ematches are configured |
470 | * or ematch is not enabled in the kernel, otherwise 0 is returned. |
471 | */ |
472 | static inline int tcf_em_tree_match(struct sk_buff *skb, |
473 | struct tcf_ematch_tree *tree, |
474 | struct tcf_pkt_info *info) |
475 | { |
476 | if (tree->hdr.nmatches) |
477 | return __tcf_em_tree_match(skb, tree, info); |
478 | else |
479 | return 1; |
480 | } |
481 | |
482 | #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) |
483 | |
484 | #else /* CONFIG_NET_EMATCH */ |
485 | |
486 | struct tcf_ematch_tree { |
487 | }; |
488 | |
489 | #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) |
490 | #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) |
491 | #define tcf_em_tree_dump(skb, t, tlv) (0) |
492 | #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) |
493 | |
494 | #endif /* CONFIG_NET_EMATCH */ |
495 | |
496 | static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) |
497 | { |
498 | switch (layer) { |
499 | case TCF_LAYER_LINK: |
500 | return skb_mac_header(skb); |
501 | case TCF_LAYER_NETWORK: |
502 | return skb_network_header(skb); |
503 | case TCF_LAYER_TRANSPORT: |
504 | return skb_transport_header(skb); |
505 | } |
506 | |
507 | return NULL; |
508 | } |
509 | |
510 | static inline int tcf_valid_offset(const struct sk_buff *skb, |
511 | const unsigned char *ptr, const int len) |
512 | { |
513 | return likely((ptr + len) <= skb_tail_pointer(skb) && |
514 | ptr >= skb->head && |
515 | (ptr <= (ptr + len))); |
516 | } |
517 | |
518 | static inline int |
519 | tcf_change_indev(struct net *net, struct nlattr *indev_tlv, |
520 | struct netlink_ext_ack *extack) |
521 | { |
522 | char indev[IFNAMSIZ]; |
523 | struct net_device *dev; |
524 | |
525 | if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { |
526 | NL_SET_ERR_MSG_ATTR(extack, indev_tlv, |
527 | "Interface name too long" ); |
528 | return -EINVAL; |
529 | } |
530 | dev = __dev_get_by_name(net, indev); |
531 | if (!dev) { |
532 | NL_SET_ERR_MSG_ATTR(extack, indev_tlv, |
533 | "Network device not found" ); |
534 | return -ENODEV; |
535 | } |
536 | return dev->ifindex; |
537 | } |
538 | |
539 | static inline bool |
540 | tcf_match_indev(struct sk_buff *skb, int ifindex) |
541 | { |
542 | if (!ifindex) |
543 | return true; |
544 | if (!skb->skb_iif) |
545 | return false; |
546 | return ifindex == skb->skb_iif; |
547 | } |
548 | |
549 | int tc_setup_offload_action(struct flow_action *flow_action, |
550 | const struct tcf_exts *exts, |
551 | struct netlink_ext_ack *extack); |
552 | void tc_cleanup_offload_action(struct flow_action *flow_action); |
553 | int tc_setup_action(struct flow_action *flow_action, |
554 | struct tc_action *actions[], |
555 | struct netlink_ext_ack *extack); |
556 | |
557 | int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, |
558 | void *type_data, bool err_stop, bool rtnl_held); |
559 | int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, |
560 | enum tc_setup_type type, void *type_data, bool err_stop, |
561 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
562 | int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, |
563 | enum tc_setup_type type, void *type_data, bool err_stop, |
564 | u32 *old_flags, unsigned int *old_in_hw_count, |
565 | u32 *new_flags, unsigned int *new_in_hw_count, |
566 | bool rtnl_held); |
567 | int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, |
568 | enum tc_setup_type type, void *type_data, bool err_stop, |
569 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
570 | int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, |
571 | bool add, flow_setup_cb_t *cb, |
572 | enum tc_setup_type type, void *type_data, |
573 | void *cb_priv, u32 *flags, unsigned int *in_hw_count); |
574 | unsigned int tcf_exts_num_actions(struct tcf_exts *exts); |
575 | |
576 | #ifdef CONFIG_NET_CLS_ACT |
577 | int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, |
578 | enum flow_block_binder_type binder_type, |
579 | struct nlattr *block_index_attr, |
580 | struct netlink_ext_ack *extack); |
581 | void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); |
582 | int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, |
583 | struct netlink_ext_ack *extack); |
584 | struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, |
585 | struct sk_buff **to_free, int *ret); |
586 | int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); |
587 | #else |
588 | static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, |
589 | enum flow_block_binder_type binder_type, |
590 | struct nlattr *block_index_attr, |
591 | struct netlink_ext_ack *extack) |
592 | { |
593 | return 0; |
594 | } |
595 | |
596 | static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) |
597 | { |
598 | } |
599 | |
600 | static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, |
601 | struct netlink_ext_ack *extack) |
602 | { |
603 | return 0; |
604 | } |
605 | |
606 | static inline struct sk_buff * |
607 | tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, |
608 | struct sk_buff **to_free, int *ret) |
609 | { |
610 | return skb; |
611 | } |
612 | |
613 | static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) |
614 | { |
615 | return 0; |
616 | } |
617 | #endif |
618 | |
619 | struct tc_cls_u32_knode { |
620 | struct tcf_exts *exts; |
621 | struct tcf_result *res; |
622 | struct tc_u32_sel *sel; |
623 | u32 handle; |
624 | u32 val; |
625 | u32 mask; |
626 | u32 link_handle; |
627 | u8 fshift; |
628 | }; |
629 | |
630 | struct tc_cls_u32_hnode { |
631 | u32 handle; |
632 | u32 prio; |
633 | unsigned int divisor; |
634 | }; |
635 | |
636 | enum tc_clsu32_command { |
637 | TC_CLSU32_NEW_KNODE, |
638 | TC_CLSU32_REPLACE_KNODE, |
639 | TC_CLSU32_DELETE_KNODE, |
640 | TC_CLSU32_NEW_HNODE, |
641 | TC_CLSU32_REPLACE_HNODE, |
642 | TC_CLSU32_DELETE_HNODE, |
643 | }; |
644 | |
645 | struct tc_cls_u32_offload { |
646 | struct flow_cls_common_offload common; |
647 | /* knode values */ |
648 | enum tc_clsu32_command command; |
649 | union { |
650 | struct tc_cls_u32_knode knode; |
651 | struct tc_cls_u32_hnode hnode; |
652 | }; |
653 | }; |
654 | |
655 | static inline bool tc_can_offload(const struct net_device *dev) |
656 | { |
657 | return dev->features & NETIF_F_HW_TC; |
658 | } |
659 | |
660 | static inline bool tc_can_offload_extack(const struct net_device *dev, |
661 | struct netlink_ext_ack *extack) |
662 | { |
663 | bool can = tc_can_offload(dev); |
664 | |
665 | if (!can) |
666 | NL_SET_ERR_MSG(extack, "TC offload is disabled on net device" ); |
667 | |
668 | return can; |
669 | } |
670 | |
671 | static inline bool |
672 | tc_cls_can_offload_and_chain0(const struct net_device *dev, |
673 | struct flow_cls_common_offload *common) |
674 | { |
675 | if (!tc_can_offload_extack(dev, common->extack)) |
676 | return false; |
677 | if (common->chain_index) { |
678 | NL_SET_ERR_MSG(common->extack, |
679 | "Driver supports only offload of chain 0" ); |
680 | return false; |
681 | } |
682 | return true; |
683 | } |
684 | |
685 | static inline bool tc_skip_hw(u32 flags) |
686 | { |
687 | return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; |
688 | } |
689 | |
690 | static inline bool tc_skip_sw(u32 flags) |
691 | { |
692 | return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; |
693 | } |
694 | |
695 | /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ |
696 | static inline bool tc_flags_valid(u32 flags) |
697 | { |
698 | if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | |
699 | TCA_CLS_FLAGS_VERBOSE)) |
700 | return false; |
701 | |
702 | flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; |
703 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) |
704 | return false; |
705 | |
706 | return true; |
707 | } |
708 | |
709 | static inline bool tc_in_hw(u32 flags) |
710 | { |
711 | return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; |
712 | } |
713 | |
714 | static inline void |
715 | tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, |
716 | const struct tcf_proto *tp, u32 flags, |
717 | struct netlink_ext_ack *extack) |
718 | { |
719 | cls_common->chain_index = tp->chain->index; |
720 | cls_common->protocol = tp->protocol; |
721 | cls_common->prio = tp->prio >> 16; |
722 | if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) |
723 | cls_common->extack = extack; |
724 | } |
725 | |
726 | #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) |
727 | static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) |
728 | { |
729 | struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT); |
730 | |
731 | if (tc_skb_ext) |
732 | memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); |
733 | return tc_skb_ext; |
734 | } |
735 | #endif |
736 | |
737 | enum tc_matchall_command { |
738 | TC_CLSMATCHALL_REPLACE, |
739 | TC_CLSMATCHALL_DESTROY, |
740 | TC_CLSMATCHALL_STATS, |
741 | }; |
742 | |
743 | struct tc_cls_matchall_offload { |
744 | struct flow_cls_common_offload common; |
745 | enum tc_matchall_command command; |
746 | struct flow_rule *rule; |
747 | struct flow_stats stats; |
748 | unsigned long cookie; |
749 | }; |
750 | |
751 | enum tc_clsbpf_command { |
752 | TC_CLSBPF_OFFLOAD, |
753 | TC_CLSBPF_STATS, |
754 | }; |
755 | |
756 | struct tc_cls_bpf_offload { |
757 | struct flow_cls_common_offload common; |
758 | enum tc_clsbpf_command command; |
759 | struct tcf_exts *exts; |
760 | struct bpf_prog *prog; |
761 | struct bpf_prog *oldprog; |
762 | const char *name; |
763 | bool exts_integrated; |
764 | }; |
765 | |
766 | struct tc_mqprio_qopt_offload { |
767 | /* struct tc_mqprio_qopt must always be the first element */ |
768 | struct tc_mqprio_qopt qopt; |
769 | u16 mode; |
770 | u16 shaper; |
771 | u32 flags; |
772 | u64 min_rate[TC_QOPT_MAX_QUEUE]; |
773 | u64 max_rate[TC_QOPT_MAX_QUEUE]; |
774 | }; |
775 | |
776 | /* This structure holds cookie structure that is passed from user |
777 | * to the kernel for actions and classifiers |
778 | */ |
779 | struct tc_cookie { |
780 | u8 *data; |
781 | u32 len; |
782 | struct rcu_head rcu; |
783 | }; |
784 | |
785 | struct tc_qopt_offload_stats { |
786 | struct gnet_stats_basic_sync *bstats; |
787 | struct gnet_stats_queue *qstats; |
788 | }; |
789 | |
790 | enum tc_mq_command { |
791 | TC_MQ_CREATE, |
792 | TC_MQ_DESTROY, |
793 | TC_MQ_STATS, |
794 | TC_MQ_GRAFT, |
795 | }; |
796 | |
797 | struct tc_mq_opt_offload_graft_params { |
798 | unsigned long queue; |
799 | u32 child_handle; |
800 | }; |
801 | |
802 | struct tc_mq_qopt_offload { |
803 | enum tc_mq_command command; |
804 | u32 handle; |
805 | union { |
806 | struct tc_qopt_offload_stats stats; |
807 | struct tc_mq_opt_offload_graft_params graft_params; |
808 | }; |
809 | }; |
810 | |
811 | enum tc_htb_command { |
812 | /* Root */ |
813 | TC_HTB_CREATE, /* Initialize HTB offload. */ |
814 | TC_HTB_DESTROY, /* Destroy HTB offload. */ |
815 | |
816 | /* Classes */ |
817 | /* Allocate qid and create leaf. */ |
818 | TC_HTB_LEAF_ALLOC_QUEUE, |
819 | /* Convert leaf to inner, preserve and return qid, create new leaf. */ |
820 | TC_HTB_LEAF_TO_INNER, |
821 | /* Delete leaf, while siblings remain. */ |
822 | TC_HTB_LEAF_DEL, |
823 | /* Delete leaf, convert parent to leaf, preserving qid. */ |
824 | TC_HTB_LEAF_DEL_LAST, |
825 | /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ |
826 | TC_HTB_LEAF_DEL_LAST_FORCE, |
827 | /* Modify parameters of a node. */ |
828 | TC_HTB_NODE_MODIFY, |
829 | |
830 | /* Class qdisc */ |
831 | TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ |
832 | }; |
833 | |
834 | struct tc_htb_qopt_offload { |
835 | struct netlink_ext_ack *extack; |
836 | enum tc_htb_command command; |
837 | u32 parent_classid; |
838 | u16 classid; |
839 | u16 qid; |
840 | u64 rate; |
841 | u64 ceil; |
842 | }; |
843 | |
844 | #define TC_HTB_CLASSID_ROOT U32_MAX |
845 | |
846 | enum tc_red_command { |
847 | TC_RED_REPLACE, |
848 | TC_RED_DESTROY, |
849 | TC_RED_STATS, |
850 | TC_RED_XSTATS, |
851 | TC_RED_GRAFT, |
852 | }; |
853 | |
854 | struct tc_red_qopt_offload_params { |
855 | u32 min; |
856 | u32 max; |
857 | u32 probability; |
858 | u32 limit; |
859 | bool is_ecn; |
860 | bool is_harddrop; |
861 | bool is_nodrop; |
862 | struct gnet_stats_queue *qstats; |
863 | }; |
864 | |
865 | struct tc_red_qopt_offload { |
866 | enum tc_red_command command; |
867 | u32 handle; |
868 | u32 parent; |
869 | union { |
870 | struct tc_red_qopt_offload_params set; |
871 | struct tc_qopt_offload_stats stats; |
872 | struct red_stats *xstats; |
873 | u32 child_handle; |
874 | }; |
875 | }; |
876 | |
877 | enum tc_gred_command { |
878 | TC_GRED_REPLACE, |
879 | TC_GRED_DESTROY, |
880 | TC_GRED_STATS, |
881 | }; |
882 | |
883 | struct tc_gred_vq_qopt_offload_params { |
884 | bool present; |
885 | u32 limit; |
886 | u32 prio; |
887 | u32 min; |
888 | u32 max; |
889 | bool is_ecn; |
890 | bool is_harddrop; |
891 | u32 probability; |
892 | /* Only need backlog, see struct tc_prio_qopt_offload_params */ |
893 | u32 *backlog; |
894 | }; |
895 | |
896 | struct tc_gred_qopt_offload_params { |
897 | bool grio_on; |
898 | bool wred_on; |
899 | unsigned int dp_cnt; |
900 | unsigned int dp_def; |
901 | struct gnet_stats_queue *qstats; |
902 | struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; |
903 | }; |
904 | |
905 | struct tc_gred_qopt_offload_stats { |
906 | struct gnet_stats_basic_sync bstats[MAX_DPs]; |
907 | struct gnet_stats_queue qstats[MAX_DPs]; |
908 | struct red_stats *xstats[MAX_DPs]; |
909 | }; |
910 | |
911 | struct tc_gred_qopt_offload { |
912 | enum tc_gred_command command; |
913 | u32 handle; |
914 | u32 parent; |
915 | union { |
916 | struct tc_gred_qopt_offload_params set; |
917 | struct tc_gred_qopt_offload_stats stats; |
918 | }; |
919 | }; |
920 | |
921 | enum tc_prio_command { |
922 | TC_PRIO_REPLACE, |
923 | TC_PRIO_DESTROY, |
924 | TC_PRIO_STATS, |
925 | TC_PRIO_GRAFT, |
926 | }; |
927 | |
928 | struct tc_prio_qopt_offload_params { |
929 | int bands; |
930 | u8 priomap[TC_PRIO_MAX + 1]; |
931 | /* At the point of un-offloading the Qdisc, the reported backlog and |
932 | * qlen need to be reduced by the portion that is in HW. |
933 | */ |
934 | struct gnet_stats_queue *qstats; |
935 | }; |
936 | |
937 | struct tc_prio_qopt_offload_graft_params { |
938 | u8 band; |
939 | u32 child_handle; |
940 | }; |
941 | |
942 | struct tc_prio_qopt_offload { |
943 | enum tc_prio_command command; |
944 | u32 handle; |
945 | u32 parent; |
946 | union { |
947 | struct tc_prio_qopt_offload_params replace_params; |
948 | struct tc_qopt_offload_stats stats; |
949 | struct tc_prio_qopt_offload_graft_params graft_params; |
950 | }; |
951 | }; |
952 | |
953 | enum tc_root_command { |
954 | TC_ROOT_GRAFT, |
955 | }; |
956 | |
957 | struct tc_root_qopt_offload { |
958 | enum tc_root_command command; |
959 | u32 handle; |
960 | bool ingress; |
961 | }; |
962 | |
963 | enum tc_ets_command { |
964 | TC_ETS_REPLACE, |
965 | TC_ETS_DESTROY, |
966 | TC_ETS_STATS, |
967 | TC_ETS_GRAFT, |
968 | }; |
969 | |
970 | struct tc_ets_qopt_offload_replace_params { |
971 | unsigned int bands; |
972 | u8 priomap[TC_PRIO_MAX + 1]; |
973 | unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ |
974 | unsigned int weights[TCQ_ETS_MAX_BANDS]; |
975 | struct gnet_stats_queue *qstats; |
976 | }; |
977 | |
978 | struct tc_ets_qopt_offload_graft_params { |
979 | u8 band; |
980 | u32 child_handle; |
981 | }; |
982 | |
983 | struct tc_ets_qopt_offload { |
984 | enum tc_ets_command command; |
985 | u32 handle; |
986 | u32 parent; |
987 | union { |
988 | struct tc_ets_qopt_offload_replace_params replace_params; |
989 | struct tc_qopt_offload_stats stats; |
990 | struct tc_ets_qopt_offload_graft_params graft_params; |
991 | }; |
992 | }; |
993 | |
994 | enum tc_tbf_command { |
995 | TC_TBF_REPLACE, |
996 | TC_TBF_DESTROY, |
997 | TC_TBF_STATS, |
998 | TC_TBF_GRAFT, |
999 | }; |
1000 | |
1001 | struct tc_tbf_qopt_offload_replace_params { |
1002 | struct psched_ratecfg rate; |
1003 | u32 max_size; |
1004 | struct gnet_stats_queue *qstats; |
1005 | }; |
1006 | |
1007 | struct tc_tbf_qopt_offload { |
1008 | enum tc_tbf_command command; |
1009 | u32 handle; |
1010 | u32 parent; |
1011 | union { |
1012 | struct tc_tbf_qopt_offload_replace_params replace_params; |
1013 | struct tc_qopt_offload_stats stats; |
1014 | u32 child_handle; |
1015 | }; |
1016 | }; |
1017 | |
1018 | enum tc_fifo_command { |
1019 | TC_FIFO_REPLACE, |
1020 | TC_FIFO_DESTROY, |
1021 | TC_FIFO_STATS, |
1022 | }; |
1023 | |
1024 | struct tc_fifo_qopt_offload { |
1025 | enum tc_fifo_command command; |
1026 | u32 handle; |
1027 | u32 parent; |
1028 | union { |
1029 | struct tc_qopt_offload_stats stats; |
1030 | }; |
1031 | }; |
1032 | |
1033 | #ifdef CONFIG_NET_CLS_ACT |
1034 | DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); |
1035 | void tc_skb_ext_tc_enable(void); |
1036 | void tc_skb_ext_tc_disable(void); |
1037 | #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) |
1038 | #else /* CONFIG_NET_CLS_ACT */ |
1039 | static inline void tc_skb_ext_tc_enable(void) { } |
1040 | static inline void tc_skb_ext_tc_disable(void) { } |
1041 | #define tc_skb_ext_tc_enabled() false |
1042 | #endif |
1043 | |
1044 | #endif |
1045 | |