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