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) */
62 struct list_head actions;
64 /* Map to export classifier specific extension TLV types to the
65 * generic extensions API. Unsupported extensions must be set to 0.
71 static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
73 #ifdef CONFIG_NET_CLS_ACT
75 INIT_LIST_HEAD(&exts->actions);
77 exts->action = action;
78 exts->police = police;
82 * tcf_exts_is_predicative - check if a predicative extension is present
83 * @exts: tc filter extensions handle
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.
89 tcf_exts_is_predicative(struct tcf_exts *exts)
91 #ifdef CONFIG_NET_CLS_ACT
92 return !list_empty(&exts->actions);
99 * tcf_exts_is_available - check if at least one extension is present
100 * @exts: tc filter extensions handle
102 * Returns 1 if at least one extension is present.
105 tcf_exts_is_available(struct tcf_exts *exts)
107 /* All non-predicative extensions must be added here. */
108 return tcf_exts_is_predicative(exts);
112 * tcf_exts_exec - execute tc filter extensions
113 * @skb: socket buffer
114 * @exts: tc filter extensions handle
115 * @res: desired result
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
123 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
124 struct tcf_result *res)
126 #ifdef CONFIG_NET_CLS_ACT
127 if (!list_empty(&exts->actions))
128 return tcf_action_exec(skb, &exts->actions, res);
133 #ifdef CONFIG_NET_CLS_ACT
135 #define tc_no_actions(_exts) \
136 (list_empty(&(_exts)->actions))
138 #define tc_for_each_action(_a, _exts) \
139 list_for_each_entry(_a, &(_exts)->actions, list)
141 #define tc_single_action(_exts) \
142 (list_is_singular(&(_exts)->actions))
144 #else /* CONFIG_NET_CLS_ACT */
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
150 #endif /* CONFIG_NET_CLS_ACT */
152 int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
153 struct nlattr **tb, struct nlattr *rate_tlv,
154 struct tcf_exts *exts, bool ovr);
155 void tcf_exts_destroy(struct tcf_exts *exts);
156 void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
157 struct tcf_exts *src);
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);
162 * struct tcf_pkt_info - packet information
164 struct tcf_pkt_info {
169 #ifdef CONFIG_NET_EMATCH
171 struct tcf_ematch_ops;
174 * struct tcf_ematch - extended match (ematch)
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
183 struct tcf_ematch_ops * ops;
185 unsigned int datalen;
191 static inline int tcf_em_is_container(struct tcf_ematch *em)
196 static inline int tcf_em_is_simple(struct tcf_ematch *em)
198 return em->flags & TCF_EM_SIMPLE;
201 static inline int tcf_em_is_inverted(struct tcf_ematch *em)
203 return em->flags & TCF_EM_INVERT;
206 static inline int tcf_em_last_match(struct tcf_ematch *em)
208 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
211 static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
213 if (tcf_em_last_match(em))
216 if (result == 0 && em->flags & TCF_EM_REL_AND)
219 if (result != 0 && em->flags & TCF_EM_REL_OR)
226 * struct tcf_ematch_tree - ematch tree handle
228 * @hdr: ematch tree header supplied by userspace
229 * @matches: array of ematches
231 struct tcf_ematch_tree {
232 struct tcf_ematch_tree_hdr hdr;
233 struct tcf_ematch * matches;
238 * struct tcf_ematch_ops - ematch module operations
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)
249 struct tcf_ematch_ops {
252 int (*change)(struct net *net, void *,
253 int, struct tcf_ematch *);
254 int (*match)(struct sk_buff *, struct tcf_ematch *,
255 struct tcf_pkt_info *);
256 void (*destroy)(struct tcf_ematch *);
257 int (*dump)(struct sk_buff *, struct tcf_ematch *);
258 struct module *owner;
259 struct list_head link;
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 *);
266 void tcf_em_tree_destroy(struct tcf_ematch_tree *);
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 *);
272 * tcf_em_tree_change - replace ematch tree of a running classifier
274 * @tp: classifier kind handle
275 * @dst: destination ematch tree variable
276 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
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
282 static inline void tcf_em_tree_change(struct tcf_proto *tp,
283 struct tcf_ematch_tree *dst,
284 struct tcf_ematch_tree *src)
287 memcpy(dst, src, sizeof(*dst));
292 * tcf_em_tree_match - evaulate an ematch tree
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
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.
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.
305 static inline int tcf_em_tree_match(struct sk_buff *skb,
306 struct tcf_ematch_tree *tree,
307 struct tcf_pkt_info *info)
309 if (tree->hdr.nmatches)
310 return __tcf_em_tree_match(skb, tree, info);
315 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
317 #else /* CONFIG_NET_EMATCH */
319 struct tcf_ematch_tree {
322 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
323 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
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)
328 #endif /* CONFIG_NET_EMATCH */
330 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
335 case TCF_LAYER_NETWORK:
336 return skb_network_header(skb);
337 case TCF_LAYER_TRANSPORT:
338 return skb_transport_header(skb);
344 static inline int tcf_valid_offset(const struct sk_buff *skb,
345 const unsigned char *ptr, const int len)
347 return likely((ptr + len) <= skb_tail_pointer(skb) &&
349 (ptr <= (ptr + len)));
352 #ifdef CONFIG_NET_CLS_IND
353 #include <net/net_namespace.h>
356 tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
358 char indev[IFNAMSIZ];
359 struct net_device *dev;
361 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
363 dev = __dev_get_by_name(net, indev);
370 tcf_match_indev(struct sk_buff *skb, int ifindex)
376 return ifindex == skb->skb_iif;
378 #endif /* CONFIG_NET_CLS_IND */
380 struct tc_cls_u32_knode {
381 struct tcf_exts *exts;
382 struct tc_u32_sel *sel;
390 struct tc_cls_u32_hnode {
393 unsigned int divisor;
396 enum tc_clsu32_command {
398 TC_CLSU32_REPLACE_KNODE,
399 TC_CLSU32_DELETE_KNODE,
401 TC_CLSU32_REPLACE_HNODE,
402 TC_CLSU32_DELETE_HNODE,
405 struct tc_cls_u32_offload {
407 enum tc_clsu32_command command;
409 struct tc_cls_u32_knode knode;
410 struct tc_cls_u32_hnode hnode;
414 static inline bool tc_should_offload(const struct net_device *dev,
415 const struct tcf_proto *tp, u32 flags)
417 const struct Qdisc *sch = tp->q;
418 const struct Qdisc_class_ops *cops = sch->ops->cl_ops;
420 if (!(dev->features & NETIF_F_HW_TC))
422 if (flags & TCA_CLS_FLAGS_SKIP_HW)
424 if (!dev->netdev_ops->ndo_setup_tc)
426 if (cops && cops->tcf_cl_offload)
427 return cops->tcf_cl_offload(tp->classid);
432 static inline bool tc_skip_sw(u32 flags)
434 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
437 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
438 static inline bool tc_flags_valid(u32 flags)
440 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
443 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
450 TC_CLSFLOWER_REPLACE,
451 TC_CLSFLOWER_DESTROY,
455 struct tc_cls_flower_offload {
456 enum tc_fl_command command;
457 unsigned long cookie;
458 struct flow_dissector *dissector;
459 struct fl_flow_key *mask;
460 struct fl_flow_key *key;
461 struct tcf_exts *exts;
464 enum tc_matchall_command {
465 TC_CLSMATCHALL_REPLACE,
466 TC_CLSMATCHALL_DESTROY,
469 struct tc_cls_matchall_offload {
470 enum tc_matchall_command command;
471 struct tcf_exts *exts;
472 unsigned long cookie;