1 #ifndef __NET_PKT_CLS_H
2 #define __NET_PKT_CLS_H
4 #include <linux/pkt_cls.h>
5 #include <net/sch_generic.h>
6 #include <net/act_api.h>
8 /* Basic packet classifier frontend definitions. */
14 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
17 int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18 int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
20 static inline unsigned long
21 __cls_set_class(unsigned long *clp, unsigned long cl)
26 static inline unsigned long
27 cls_set_class(struct tcf_proto *tp, unsigned long *clp,
33 old_cl = __cls_set_class(clp, cl);
40 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
44 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
45 cl = cls_set_class(tp, &r->class, cl);
47 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
51 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
55 if ((cl = __cls_set_class(&r->class, 0)) != 0)
56 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
60 #ifdef CONFIG_NET_CLS_ACT
61 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
63 struct tc_action **actions;
65 /* Map to export classifier specific extension TLV types to the
66 * generic extensions API. Unsupported extensions must be set to 0.
72 static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
74 #ifdef CONFIG_NET_CLS_ACT
77 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
82 exts->action = action;
83 exts->police = police;
88 * tcf_exts_is_predicative - check if a predicative extension is present
89 * @exts: tc filter extensions handle
91 * Returns 1 if a predicative extension is present, i.e. an extension which
92 * might cause further actions and thus overrule the regular tcf_result.
95 tcf_exts_is_predicative(struct tcf_exts *exts)
97 #ifdef CONFIG_NET_CLS_ACT
98 return exts->nr_actions;
105 * tcf_exts_is_available - check if at least one extension is present
106 * @exts: tc filter extensions handle
108 * Returns 1 if at least one extension is present.
111 tcf_exts_is_available(struct tcf_exts *exts)
113 /* All non-predicative extensions must be added here. */
114 return tcf_exts_is_predicative(exts);
117 static inline void tcf_exts_to_list(const struct tcf_exts *exts,
118 struct list_head *actions)
120 #ifdef CONFIG_NET_CLS_ACT
123 for (i = 0; i < exts->nr_actions; i++) {
124 struct tc_action *a = exts->actions[i];
126 list_add_tail(&a->list, actions);
132 * tcf_exts_exec - execute tc filter extensions
133 * @skb: socket buffer
134 * @exts: tc filter extensions handle
135 * @res: desired result
137 * Executes all configured extensions. Returns 0 on a normal execution,
138 * a negative number if the filter must be considered unmatched or
139 * a positive action code (TC_ACT_*) which must be returned to the
143 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
144 struct tcf_result *res)
146 #ifdef CONFIG_NET_CLS_ACT
147 if (exts->nr_actions)
148 return tcf_action_exec(skb, exts->actions, exts->nr_actions,
154 #ifdef CONFIG_NET_CLS_ACT
156 #define tc_no_actions(_exts) ((_exts)->nr_actions == 0)
157 #define tc_single_action(_exts) ((_exts)->nr_actions == 1)
159 #else /* CONFIG_NET_CLS_ACT */
161 #define tc_no_actions(_exts) true
162 #define tc_single_action(_exts) false
164 #endif /* CONFIG_NET_CLS_ACT */
166 int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
167 struct nlattr **tb, struct nlattr *rate_tlv,
168 struct tcf_exts *exts, bool ovr);
169 void tcf_exts_destroy(struct tcf_exts *exts);
170 void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
171 struct tcf_exts *src);
172 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
173 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
174 int tcf_exts_get_dev(struct net_device *dev, struct tcf_exts *exts,
175 struct net_device **hw_dev);
178 * struct tcf_pkt_info - packet information
180 struct tcf_pkt_info {
185 #ifdef CONFIG_NET_EMATCH
187 struct tcf_ematch_ops;
190 * struct tcf_ematch - extended match (ematch)
192 * @matchid: identifier to allow userspace to reidentify a match
193 * @flags: flags specifying attributes and the relation to other matches
194 * @ops: the operations lookup table of the corresponding ematch module
195 * @datalen: length of the ematch specific configuration data
196 * @data: ematch specific data
199 struct tcf_ematch_ops * ops;
201 unsigned int datalen;
207 static inline int tcf_em_is_container(struct tcf_ematch *em)
212 static inline int tcf_em_is_simple(struct tcf_ematch *em)
214 return em->flags & TCF_EM_SIMPLE;
217 static inline int tcf_em_is_inverted(struct tcf_ematch *em)
219 return em->flags & TCF_EM_INVERT;
222 static inline int tcf_em_last_match(struct tcf_ematch *em)
224 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
227 static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
229 if (tcf_em_last_match(em))
232 if (result == 0 && em->flags & TCF_EM_REL_AND)
235 if (result != 0 && em->flags & TCF_EM_REL_OR)
242 * struct tcf_ematch_tree - ematch tree handle
244 * @hdr: ematch tree header supplied by userspace
245 * @matches: array of ematches
247 struct tcf_ematch_tree {
248 struct tcf_ematch_tree_hdr hdr;
249 struct tcf_ematch * matches;
254 * struct tcf_ematch_ops - ematch module operations
256 * @kind: identifier (kind) of this ematch module
257 * @datalen: length of expected configuration data (optional)
258 * @change: called during validation (optional)
259 * @match: called during ematch tree evaluation, must return 1/0
260 * @destroy: called during destroyage (optional)
261 * @dump: called during dumping process (optional)
262 * @owner: owner, must be set to THIS_MODULE
263 * @link: link to previous/next ematch module (internal use)
265 struct tcf_ematch_ops {
268 int (*change)(struct net *net, void *,
269 int, struct tcf_ematch *);
270 int (*match)(struct sk_buff *, struct tcf_ematch *,
271 struct tcf_pkt_info *);
272 void (*destroy)(struct tcf_ematch *);
273 int (*dump)(struct sk_buff *, struct tcf_ematch *);
274 struct module *owner;
275 struct list_head link;
278 int tcf_em_register(struct tcf_ematch_ops *);
279 void tcf_em_unregister(struct tcf_ematch_ops *);
280 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
281 struct tcf_ematch_tree *);
282 void tcf_em_tree_destroy(struct tcf_ematch_tree *);
283 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
284 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
285 struct tcf_pkt_info *);
288 * tcf_em_tree_change - replace ematch tree of a running classifier
290 * @tp: classifier kind handle
291 * @dst: destination ematch tree variable
292 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
294 * This functions replaces the ematch tree in @dst with the ematch
295 * tree in @src. The classifier in charge of the ematch tree may be
298 static inline void tcf_em_tree_change(struct tcf_proto *tp,
299 struct tcf_ematch_tree *dst,
300 struct tcf_ematch_tree *src)
303 memcpy(dst, src, sizeof(*dst));
308 * tcf_em_tree_match - evaulate an ematch tree
310 * @skb: socket buffer of the packet in question
311 * @tree: ematch tree to be used for evaluation
312 * @info: packet information examined by classifier
314 * This function matches @skb against the ematch tree in @tree by going
315 * through all ematches respecting their logic relations returning
316 * as soon as the result is obvious.
318 * Returns 1 if the ematch tree as-one matches, no ematches are configured
319 * or ematch is not enabled in the kernel, otherwise 0 is returned.
321 static inline int tcf_em_tree_match(struct sk_buff *skb,
322 struct tcf_ematch_tree *tree,
323 struct tcf_pkt_info *info)
325 if (tree->hdr.nmatches)
326 return __tcf_em_tree_match(skb, tree, info);
331 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
333 #else /* CONFIG_NET_EMATCH */
335 struct tcf_ematch_tree {
338 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
339 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
340 #define tcf_em_tree_dump(skb, t, tlv) (0)
341 #define tcf_em_tree_change(tp, dst, src) do { } while(0)
342 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
344 #endif /* CONFIG_NET_EMATCH */
346 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
351 case TCF_LAYER_NETWORK:
352 return skb_network_header(skb);
353 case TCF_LAYER_TRANSPORT:
354 return skb_transport_header(skb);
360 static inline int tcf_valid_offset(const struct sk_buff *skb,
361 const unsigned char *ptr, const int len)
363 return likely((ptr + len) <= skb_tail_pointer(skb) &&
365 (ptr <= (ptr + len)));
368 #ifdef CONFIG_NET_CLS_IND
369 #include <net/net_namespace.h>
372 tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
374 char indev[IFNAMSIZ];
375 struct net_device *dev;
377 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
379 dev = __dev_get_by_name(net, indev);
386 tcf_match_indev(struct sk_buff *skb, int ifindex)
392 return ifindex == skb->skb_iif;
394 #endif /* CONFIG_NET_CLS_IND */
396 struct tc_cls_u32_knode {
397 struct tcf_exts *exts;
398 struct tc_u32_sel *sel;
406 struct tc_cls_u32_hnode {
409 unsigned int divisor;
412 enum tc_clsu32_command {
414 TC_CLSU32_REPLACE_KNODE,
415 TC_CLSU32_DELETE_KNODE,
417 TC_CLSU32_REPLACE_HNODE,
418 TC_CLSU32_DELETE_HNODE,
421 struct tc_cls_u32_offload {
423 enum tc_clsu32_command command;
425 struct tc_cls_u32_knode knode;
426 struct tc_cls_u32_hnode hnode;
430 static inline bool tc_can_offload(const struct net_device *dev,
431 const struct tcf_proto *tp)
433 const struct Qdisc *sch = tp->q;
434 const struct Qdisc_class_ops *cops = sch->ops->cl_ops;
436 if (!(dev->features & NETIF_F_HW_TC))
438 if (!dev->netdev_ops->ndo_setup_tc)
440 if (cops && cops->tcf_cl_offload)
441 return cops->tcf_cl_offload(tp->classid);
446 static inline bool tc_skip_hw(u32 flags)
448 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
451 static inline bool tc_should_offload(const struct net_device *dev,
452 const struct tcf_proto *tp, u32 flags)
454 if (tc_skip_hw(flags))
456 return tc_can_offload(dev, tp);
459 static inline bool tc_skip_sw(u32 flags)
461 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
464 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
465 static inline bool tc_flags_valid(u32 flags)
467 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
470 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
477 TC_CLSFLOWER_REPLACE,
478 TC_CLSFLOWER_DESTROY,
482 struct tc_cls_flower_offload {
483 enum tc_fl_command command;
484 unsigned long cookie;
485 struct flow_dissector *dissector;
486 struct fl_flow_key *mask;
487 struct fl_flow_key *key;
488 struct tcf_exts *exts;
491 enum tc_matchall_command {
492 TC_CLSMATCHALL_REPLACE,
493 TC_CLSMATCHALL_DESTROY,
496 struct tc_cls_matchall_offload {
497 enum tc_matchall_command command;
498 struct tcf_exts *exts;
499 unsigned long cookie;
502 enum tc_clsbpf_command {
509 struct tc_cls_bpf_offload {
510 enum tc_clsbpf_command command;
511 struct tcf_exts *exts;
512 struct bpf_prog *prog;
514 bool exts_integrated;