Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef __NET_PKT_CLS_H |
2 | #define __NET_PKT_CLS_H | |
3 | ||
4 | #include <linux/pkt_cls.h> | |
5 | #include <net/sch_generic.h> | |
6 | #include <net/act_api.h> | |
7 | ||
8 | /* Basic packet classifier frontend definitions. */ | |
9 | ||
fd2c3ef7 | 10 | struct tcf_walker { |
1da177e4 LT |
11 | int stop; |
12 | int skip; | |
13 | int count; | |
14 | int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *); | |
15 | }; | |
16 | ||
5c15257f JP |
17 | int register_tcf_proto_ops(struct tcf_proto_ops *ops); |
18 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops); | |
1da177e4 LT |
19 | |
20 | static inline unsigned long | |
21 | __cls_set_class(unsigned long *clp, unsigned long cl) | |
22 | { | |
a0efb80c | 23 | return xchg(clp, cl); |
1da177e4 LT |
24 | } |
25 | ||
26 | static inline unsigned long | |
27 | cls_set_class(struct tcf_proto *tp, unsigned long *clp, | |
28 | unsigned long cl) | |
29 | { | |
30 | unsigned long old_cl; | |
31 | ||
32 | tcf_tree_lock(tp); | |
33 | old_cl = __cls_set_class(clp, cl); | |
34 | tcf_tree_unlock(tp); | |
35 | ||
36 | return old_cl; | |
37 | } | |
38 | ||
39 | static inline void | |
40 | tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) | |
41 | { | |
42 | unsigned long cl; | |
43 | ||
44 | cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid); | |
45 | cl = cls_set_class(tp, &r->class, cl); | |
46 | if (cl) | |
47 | tp->q->ops->cl_ops->unbind_tcf(tp->q, cl); | |
48 | } | |
49 | ||
50 | static inline void | |
51 | tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) | |
52 | { | |
53 | unsigned long cl; | |
54 | ||
55 | if ((cl = __cls_set_class(&r->class, 0)) != 0) | |
56 | tp->q->ops->cl_ops->unbind_tcf(tp->q, cl); | |
57 | } | |
58 | ||
fd2c3ef7 | 59 | struct tcf_exts { |
1da177e4 | 60 | #ifdef CONFIG_NET_CLS_ACT |
33be6271 | 61 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
22dc13c8 WC |
62 | int nr_actions; |
63 | struct tc_action **actions; | |
1da177e4 | 64 | #endif |
5da57f42 WC |
65 | /* Map to export classifier specific extension TLV types to the |
66 | * generic extensions API. Unsupported extensions must be set to 0. | |
67 | */ | |
1da177e4 LT |
68 | int action; |
69 | int police; | |
70 | }; | |
71 | ||
5da57f42 | 72 | static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police) |
33be6271 WC |
73 | { |
74 | #ifdef CONFIG_NET_CLS_ACT | |
5da57f42 | 75 | exts->type = 0; |
22dc13c8 WC |
76 | exts->nr_actions = 0; |
77 | exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), | |
78 | GFP_KERNEL); | |
79 | WARN_ON(!exts->actions); /* TODO: propagate the error to callers */ | |
33be6271 | 80 | #endif |
5da57f42 WC |
81 | exts->action = action; |
82 | exts->police = police; | |
33be6271 WC |
83 | } |
84 | ||
1da177e4 LT |
85 | /** |
86 | * tcf_exts_is_predicative - check if a predicative extension is present | |
87 | * @exts: tc filter extensions handle | |
88 | * | |
89 | * Returns 1 if a predicative extension is present, i.e. an extension which | |
90 | * might cause further actions and thus overrule the regular tcf_result. | |
91 | */ | |
92 | static inline int | |
93 | tcf_exts_is_predicative(struct tcf_exts *exts) | |
94 | { | |
95 | #ifdef CONFIG_NET_CLS_ACT | |
22dc13c8 | 96 | return exts->nr_actions; |
1da177e4 LT |
97 | #else |
98 | return 0; | |
99 | #endif | |
100 | } | |
101 | ||
102 | /** | |
103 | * tcf_exts_is_available - check if at least one extension is present | |
104 | * @exts: tc filter extensions handle | |
105 | * | |
106 | * Returns 1 if at least one extension is present. | |
107 | */ | |
108 | static inline int | |
109 | tcf_exts_is_available(struct tcf_exts *exts) | |
110 | { | |
111 | /* All non-predicative extensions must be added here. */ | |
112 | return tcf_exts_is_predicative(exts); | |
113 | } | |
114 | ||
22dc13c8 WC |
115 | static inline void tcf_exts_to_list(const struct tcf_exts *exts, |
116 | struct list_head *actions) | |
117 | { | |
118 | #ifdef CONFIG_NET_CLS_ACT | |
119 | int i; | |
120 | ||
121 | for (i = 0; i < exts->nr_actions; i++) { | |
122 | struct tc_action *a = exts->actions[i]; | |
123 | ||
124 | list_add(&a->list, actions); | |
125 | } | |
126 | #endif | |
127 | } | |
128 | ||
1da177e4 LT |
129 | /** |
130 | * tcf_exts_exec - execute tc filter extensions | |
131 | * @skb: socket buffer | |
132 | * @exts: tc filter extensions handle | |
133 | * @res: desired result | |
134 | * | |
135 | * Executes all configured extensions. Returns 0 on a normal execution, | |
136 | * a negative number if the filter must be considered unmatched or | |
137 | * a positive action code (TC_ACT_*) which must be returned to the | |
138 | * underlying layer. | |
139 | */ | |
140 | static inline int | |
141 | tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, | |
142 | struct tcf_result *res) | |
143 | { | |
144 | #ifdef CONFIG_NET_CLS_ACT | |
22dc13c8 WC |
145 | if (exts->nr_actions) |
146 | return tcf_action_exec(skb, exts->actions, exts->nr_actions, | |
147 | res); | |
1da177e4 | 148 | #endif |
1da177e4 LT |
149 | return 0; |
150 | } | |
151 | ||
2734437e WC |
152 | #ifdef CONFIG_NET_CLS_ACT |
153 | ||
22dc13c8 WC |
154 | #define tc_no_actions(_exts) ((_exts)->nr_actions == 0) |
155 | #define tc_single_action(_exts) ((_exts)->nr_actions == 1) | |
2734437e WC |
156 | |
157 | #else /* CONFIG_NET_CLS_ACT */ | |
158 | ||
159 | #define tc_no_actions(_exts) true | |
2734437e WC |
160 | #define tc_single_action(_exts) false |
161 | ||
162 | #endif /* CONFIG_NET_CLS_ACT */ | |
163 | ||
5c15257f JP |
164 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, |
165 | struct nlattr **tb, struct nlattr *rate_tlv, | |
2f7ef2f8 | 166 | struct tcf_exts *exts, bool ovr); |
18d0264f | 167 | void tcf_exts_destroy(struct tcf_exts *exts); |
5c15257f JP |
168 | void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst, |
169 | struct tcf_exts *src); | |
5da57f42 WC |
170 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); |
171 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); | |
1da177e4 LT |
172 | |
173 | /** | |
174 | * struct tcf_pkt_info - packet information | |
175 | */ | |
fd2c3ef7 | 176 | struct tcf_pkt_info { |
1da177e4 LT |
177 | unsigned char * ptr; |
178 | int nexthdr; | |
179 | }; | |
180 | ||
181 | #ifdef CONFIG_NET_EMATCH | |
182 | ||
183 | struct tcf_ematch_ops; | |
184 | ||
185 | /** | |
186 | * struct tcf_ematch - extended match (ematch) | |
187 | * | |
188 | * @matchid: identifier to allow userspace to reidentify a match | |
189 | * @flags: flags specifying attributes and the relation to other matches | |
190 | * @ops: the operations lookup table of the corresponding ematch module | |
191 | * @datalen: length of the ematch specific configuration data | |
192 | * @data: ematch specific data | |
193 | */ | |
fd2c3ef7 | 194 | struct tcf_ematch { |
1da177e4 LT |
195 | struct tcf_ematch_ops * ops; |
196 | unsigned long data; | |
197 | unsigned int datalen; | |
198 | u16 matchid; | |
199 | u16 flags; | |
82a470f1 | 200 | struct net *net; |
1da177e4 LT |
201 | }; |
202 | ||
203 | static inline int tcf_em_is_container(struct tcf_ematch *em) | |
204 | { | |
205 | return !em->ops; | |
206 | } | |
207 | ||
208 | static inline int tcf_em_is_simple(struct tcf_ematch *em) | |
209 | { | |
210 | return em->flags & TCF_EM_SIMPLE; | |
211 | } | |
212 | ||
213 | static inline int tcf_em_is_inverted(struct tcf_ematch *em) | |
214 | { | |
215 | return em->flags & TCF_EM_INVERT; | |
216 | } | |
217 | ||
218 | static inline int tcf_em_last_match(struct tcf_ematch *em) | |
219 | { | |
220 | return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; | |
221 | } | |
222 | ||
223 | static inline int tcf_em_early_end(struct tcf_ematch *em, int result) | |
224 | { | |
225 | if (tcf_em_last_match(em)) | |
226 | return 1; | |
227 | ||
228 | if (result == 0 && em->flags & TCF_EM_REL_AND) | |
229 | return 1; | |
230 | ||
231 | if (result != 0 && em->flags & TCF_EM_REL_OR) | |
232 | return 1; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /** | |
238 | * struct tcf_ematch_tree - ematch tree handle | |
239 | * | |
240 | * @hdr: ematch tree header supplied by userspace | |
241 | * @matches: array of ematches | |
242 | */ | |
fd2c3ef7 | 243 | struct tcf_ematch_tree { |
1da177e4 LT |
244 | struct tcf_ematch_tree_hdr hdr; |
245 | struct tcf_ematch * matches; | |
246 | ||
247 | }; | |
248 | ||
249 | /** | |
250 | * struct tcf_ematch_ops - ematch module operations | |
251 | * | |
252 | * @kind: identifier (kind) of this ematch module | |
253 | * @datalen: length of expected configuration data (optional) | |
254 | * @change: called during validation (optional) | |
255 | * @match: called during ematch tree evaluation, must return 1/0 | |
256 | * @destroy: called during destroyage (optional) | |
257 | * @dump: called during dumping process (optional) | |
258 | * @owner: owner, must be set to THIS_MODULE | |
259 | * @link: link to previous/next ematch module (internal use) | |
260 | */ | |
fd2c3ef7 | 261 | struct tcf_ematch_ops { |
1da177e4 LT |
262 | int kind; |
263 | int datalen; | |
82a470f1 | 264 | int (*change)(struct net *net, void *, |
1da177e4 LT |
265 | int, struct tcf_ematch *); |
266 | int (*match)(struct sk_buff *, struct tcf_ematch *, | |
267 | struct tcf_pkt_info *); | |
82a470f1 | 268 | void (*destroy)(struct tcf_ematch *); |
1da177e4 LT |
269 | int (*dump)(struct sk_buff *, struct tcf_ematch *); |
270 | struct module *owner; | |
271 | struct list_head link; | |
272 | }; | |
273 | ||
5c15257f JP |
274 | int tcf_em_register(struct tcf_ematch_ops *); |
275 | void tcf_em_unregister(struct tcf_ematch_ops *); | |
276 | int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, | |
277 | struct tcf_ematch_tree *); | |
82a470f1 | 278 | void tcf_em_tree_destroy(struct tcf_ematch_tree *); |
5c15257f JP |
279 | int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); |
280 | int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, | |
281 | struct tcf_pkt_info *); | |
1da177e4 LT |
282 | |
283 | /** | |
284 | * tcf_em_tree_change - replace ematch tree of a running classifier | |
285 | * | |
286 | * @tp: classifier kind handle | |
287 | * @dst: destination ematch tree variable | |
288 | * @src: source ematch tree (temporary tree from tcf_em_tree_validate) | |
289 | * | |
290 | * This functions replaces the ematch tree in @dst with the ematch | |
291 | * tree in @src. The classifier in charge of the ematch tree may be | |
292 | * running. | |
293 | */ | |
294 | static inline void tcf_em_tree_change(struct tcf_proto *tp, | |
295 | struct tcf_ematch_tree *dst, | |
296 | struct tcf_ematch_tree *src) | |
297 | { | |
298 | tcf_tree_lock(tp); | |
299 | memcpy(dst, src, sizeof(*dst)); | |
300 | tcf_tree_unlock(tp); | |
301 | } | |
302 | ||
303 | /** | |
304 | * tcf_em_tree_match - evaulate an ematch tree | |
305 | * | |
306 | * @skb: socket buffer of the packet in question | |
307 | * @tree: ematch tree to be used for evaluation | |
308 | * @info: packet information examined by classifier | |
309 | * | |
310 | * This function matches @skb against the ematch tree in @tree by going | |
311 | * through all ematches respecting their logic relations returning | |
312 | * as soon as the result is obvious. | |
313 | * | |
314 | * Returns 1 if the ematch tree as-one matches, no ematches are configured | |
315 | * or ematch is not enabled in the kernel, otherwise 0 is returned. | |
316 | */ | |
317 | static inline int tcf_em_tree_match(struct sk_buff *skb, | |
318 | struct tcf_ematch_tree *tree, | |
319 | struct tcf_pkt_info *info) | |
320 | { | |
321 | if (tree->hdr.nmatches) | |
322 | return __tcf_em_tree_match(skb, tree, info); | |
323 | else | |
324 | return 1; | |
325 | } | |
326 | ||
db3d99c0 PM |
327 | #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) |
328 | ||
1da177e4 LT |
329 | #else /* CONFIG_NET_EMATCH */ |
330 | ||
fd2c3ef7 | 331 | struct tcf_ematch_tree { |
1da177e4 LT |
332 | }; |
333 | ||
334 | #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) | |
82a470f1 | 335 | #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) |
1da177e4 LT |
336 | #define tcf_em_tree_dump(skb, t, tlv) (0) |
337 | #define tcf_em_tree_change(tp, dst, src) do { } while(0) | |
338 | #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) | |
339 | ||
340 | #endif /* CONFIG_NET_EMATCH */ | |
341 | ||
342 | static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) | |
343 | { | |
344 | switch (layer) { | |
345 | case TCF_LAYER_LINK: | |
346 | return skb->data; | |
347 | case TCF_LAYER_NETWORK: | |
d56f90a7 | 348 | return skb_network_header(skb); |
1da177e4 | 349 | case TCF_LAYER_TRANSPORT: |
9c70220b | 350 | return skb_transport_header(skb); |
1da177e4 LT |
351 | } |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
eddc9ec5 ACM |
356 | static inline int tcf_valid_offset(const struct sk_buff *skb, |
357 | const unsigned char *ptr, const int len) | |
1da177e4 | 358 | { |
da521b2c DM |
359 | return likely((ptr + len) <= skb_tail_pointer(skb) && |
360 | ptr >= skb->head && | |
361 | (ptr <= (ptr + len))); | |
1da177e4 LT |
362 | } |
363 | ||
364 | #ifdef CONFIG_NET_CLS_IND | |
0eeb8ffc DL |
365 | #include <net/net_namespace.h> |
366 | ||
1da177e4 | 367 | static inline int |
2519a602 | 368 | tcf_change_indev(struct net *net, struct nlattr *indev_tlv) |
1da177e4 | 369 | { |
2519a602 WC |
370 | char indev[IFNAMSIZ]; |
371 | struct net_device *dev; | |
372 | ||
add93b61 | 373 | if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) |
1da177e4 | 374 | return -EINVAL; |
2519a602 WC |
375 | dev = __dev_get_by_name(net, indev); |
376 | if (!dev) | |
377 | return -ENODEV; | |
378 | return dev->ifindex; | |
1da177e4 LT |
379 | } |
380 | ||
2519a602 WC |
381 | static inline bool |
382 | tcf_match_indev(struct sk_buff *skb, int ifindex) | |
1da177e4 | 383 | { |
2519a602 WC |
384 | if (!ifindex) |
385 | return true; | |
386 | if (!skb->skb_iif) | |
387 | return false; | |
388 | return ifindex == skb->skb_iif; | |
1da177e4 LT |
389 | } |
390 | #endif /* CONFIG_NET_CLS_IND */ | |
391 | ||
a1b7c5fd JF |
392 | struct tc_cls_u32_knode { |
393 | struct tcf_exts *exts; | |
e014860e | 394 | struct tc_u32_sel *sel; |
a1b7c5fd JF |
395 | u32 handle; |
396 | u32 val; | |
397 | u32 mask; | |
398 | u32 link_handle; | |
e014860e | 399 | u8 fshift; |
a1b7c5fd JF |
400 | }; |
401 | ||
402 | struct tc_cls_u32_hnode { | |
403 | u32 handle; | |
404 | u32 prio; | |
405 | unsigned int divisor; | |
406 | }; | |
407 | ||
408 | enum tc_clsu32_command { | |
409 | TC_CLSU32_NEW_KNODE, | |
410 | TC_CLSU32_REPLACE_KNODE, | |
411 | TC_CLSU32_DELETE_KNODE, | |
412 | TC_CLSU32_NEW_HNODE, | |
413 | TC_CLSU32_REPLACE_HNODE, | |
414 | TC_CLSU32_DELETE_HNODE, | |
415 | }; | |
416 | ||
417 | struct tc_cls_u32_offload { | |
418 | /* knode values */ | |
419 | enum tc_clsu32_command command; | |
420 | union { | |
421 | struct tc_cls_u32_knode knode; | |
422 | struct tc_cls_u32_hnode hnode; | |
423 | }; | |
424 | }; | |
425 | ||
92c075db DB |
426 | static inline bool tc_should_offload(const struct net_device *dev, |
427 | const struct tcf_proto *tp, u32 flags) | |
6843e7a2 | 428 | { |
92c075db DB |
429 | const struct Qdisc *sch = tp->q; |
430 | const struct Qdisc_class_ops *cops = sch->ops->cl_ops; | |
431 | ||
2b6ab0d3 JF |
432 | if (!(dev->features & NETIF_F_HW_TC)) |
433 | return false; | |
9e8ce79c JF |
434 | if (flags & TCA_CLS_FLAGS_SKIP_HW) |
435 | return false; | |
9e8ce79c JF |
436 | if (!dev->netdev_ops->ndo_setup_tc) |
437 | return false; | |
92c075db DB |
438 | if (cops && cops->tcf_cl_offload) |
439 | return cops->tcf_cl_offload(tp->classid); | |
9e8ce79c JF |
440 | |
441 | return true; | |
6843e7a2 JF |
442 | } |
443 | ||
d34e3e18 SS |
444 | static inline bool tc_skip_sw(u32 flags) |
445 | { | |
446 | return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; | |
447 | } | |
448 | ||
449 | /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ | |
450 | static inline bool tc_flags_valid(u32 flags) | |
451 | { | |
452 | if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)) | |
453 | return false; | |
454 | ||
455 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) | |
456 | return false; | |
457 | ||
458 | return true; | |
459 | } | |
460 | ||
5b33f488 AV |
461 | enum tc_fl_command { |
462 | TC_CLSFLOWER_REPLACE, | |
463 | TC_CLSFLOWER_DESTROY, | |
10cbc684 | 464 | TC_CLSFLOWER_STATS, |
5b33f488 AV |
465 | }; |
466 | ||
467 | struct tc_cls_flower_offload { | |
468 | enum tc_fl_command command; | |
8208d21b | 469 | unsigned long cookie; |
5b33f488 AV |
470 | struct flow_dissector *dissector; |
471 | struct fl_flow_key *mask; | |
472 | struct fl_flow_key *key; | |
473 | struct tcf_exts *exts; | |
474 | }; | |
475 | ||
b87f7936 YG |
476 | enum tc_matchall_command { |
477 | TC_CLSMATCHALL_REPLACE, | |
478 | TC_CLSMATCHALL_DESTROY, | |
479 | }; | |
480 | ||
481 | struct tc_cls_matchall_offload { | |
482 | enum tc_matchall_command command; | |
483 | struct tcf_exts *exts; | |
484 | unsigned long cookie; | |
485 | }; | |
486 | ||
1da177e4 | 487 | #endif |