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 int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
134 struct nlattr **tb, struct nlattr *rate_tlv,
135 struct tcf_exts *exts, bool ovr);
136 void tcf_exts_destroy(struct tcf_exts *exts);
137 void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
138 struct tcf_exts *src);
139 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
140 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
143 * struct tcf_pkt_info - packet information
145 struct tcf_pkt_info {
150 #ifdef CONFIG_NET_EMATCH
152 struct tcf_ematch_ops;
155 * struct tcf_ematch - extended match (ematch)
157 * @matchid: identifier to allow userspace to reidentify a match
158 * @flags: flags specifying attributes and the relation to other matches
159 * @ops: the operations lookup table of the corresponding ematch module
160 * @datalen: length of the ematch specific configuration data
161 * @data: ematch specific data
164 struct tcf_ematch_ops * ops;
166 unsigned int datalen;
172 static inline int tcf_em_is_container(struct tcf_ematch *em)
177 static inline int tcf_em_is_simple(struct tcf_ematch *em)
179 return em->flags & TCF_EM_SIMPLE;
182 static inline int tcf_em_is_inverted(struct tcf_ematch *em)
184 return em->flags & TCF_EM_INVERT;
187 static inline int tcf_em_last_match(struct tcf_ematch *em)
189 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
192 static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
194 if (tcf_em_last_match(em))
197 if (result == 0 && em->flags & TCF_EM_REL_AND)
200 if (result != 0 && em->flags & TCF_EM_REL_OR)
207 * struct tcf_ematch_tree - ematch tree handle
209 * @hdr: ematch tree header supplied by userspace
210 * @matches: array of ematches
212 struct tcf_ematch_tree {
213 struct tcf_ematch_tree_hdr hdr;
214 struct tcf_ematch * matches;
219 * struct tcf_ematch_ops - ematch module operations
221 * @kind: identifier (kind) of this ematch module
222 * @datalen: length of expected configuration data (optional)
223 * @change: called during validation (optional)
224 * @match: called during ematch tree evaluation, must return 1/0
225 * @destroy: called during destroyage (optional)
226 * @dump: called during dumping process (optional)
227 * @owner: owner, must be set to THIS_MODULE
228 * @link: link to previous/next ematch module (internal use)
230 struct tcf_ematch_ops {
233 int (*change)(struct net *net, void *,
234 int, struct tcf_ematch *);
235 int (*match)(struct sk_buff *, struct tcf_ematch *,
236 struct tcf_pkt_info *);
237 void (*destroy)(struct tcf_ematch *);
238 int (*dump)(struct sk_buff *, struct tcf_ematch *);
239 struct module *owner;
240 struct list_head link;
243 int tcf_em_register(struct tcf_ematch_ops *);
244 void tcf_em_unregister(struct tcf_ematch_ops *);
245 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
246 struct tcf_ematch_tree *);
247 void tcf_em_tree_destroy(struct tcf_ematch_tree *);
248 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
249 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
250 struct tcf_pkt_info *);
253 * tcf_em_tree_change - replace ematch tree of a running classifier
255 * @tp: classifier kind handle
256 * @dst: destination ematch tree variable
257 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
259 * This functions replaces the ematch tree in @dst with the ematch
260 * tree in @src. The classifier in charge of the ematch tree may be
263 static inline void tcf_em_tree_change(struct tcf_proto *tp,
264 struct tcf_ematch_tree *dst,
265 struct tcf_ematch_tree *src)
268 memcpy(dst, src, sizeof(*dst));
273 * tcf_em_tree_match - evaulate an ematch tree
275 * @skb: socket buffer of the packet in question
276 * @tree: ematch tree to be used for evaluation
277 * @info: packet information examined by classifier
279 * This function matches @skb against the ematch tree in @tree by going
280 * through all ematches respecting their logic relations returning
281 * as soon as the result is obvious.
283 * Returns 1 if the ematch tree as-one matches, no ematches are configured
284 * or ematch is not enabled in the kernel, otherwise 0 is returned.
286 static inline int tcf_em_tree_match(struct sk_buff *skb,
287 struct tcf_ematch_tree *tree,
288 struct tcf_pkt_info *info)
290 if (tree->hdr.nmatches)
291 return __tcf_em_tree_match(skb, tree, info);
296 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
298 #else /* CONFIG_NET_EMATCH */
300 struct tcf_ematch_tree {
303 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
304 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
305 #define tcf_em_tree_dump(skb, t, tlv) (0)
306 #define tcf_em_tree_change(tp, dst, src) do { } while(0)
307 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
309 #endif /* CONFIG_NET_EMATCH */
311 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
316 case TCF_LAYER_NETWORK:
317 return skb_network_header(skb);
318 case TCF_LAYER_TRANSPORT:
319 return skb_transport_header(skb);
325 static inline int tcf_valid_offset(const struct sk_buff *skb,
326 const unsigned char *ptr, const int len)
328 return likely((ptr + len) <= skb_tail_pointer(skb) &&
330 (ptr <= (ptr + len)));
333 #ifdef CONFIG_NET_CLS_IND
334 #include <net/net_namespace.h>
337 tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
339 char indev[IFNAMSIZ];
340 struct net_device *dev;
342 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
344 dev = __dev_get_by_name(net, indev);
351 tcf_match_indev(struct sk_buff *skb, int ifindex)
357 return ifindex == skb->skb_iif;
359 #endif /* CONFIG_NET_CLS_IND */
361 struct tc_cls_u32_knode {
362 struct tcf_exts *exts;
363 struct tc_u32_sel *sel;
371 struct tc_cls_u32_hnode {
374 unsigned int divisor;
377 enum tc_clsu32_command {
379 TC_CLSU32_REPLACE_KNODE,
380 TC_CLSU32_DELETE_KNODE,
382 TC_CLSU32_REPLACE_HNODE,
383 TC_CLSU32_DELETE_HNODE,
386 struct tc_cls_u32_offload {
388 enum tc_clsu32_command command;
390 struct tc_cls_u32_knode knode;
391 struct tc_cls_u32_hnode hnode;
395 static inline bool tc_should_offload(const struct net_device *dev,
396 const struct tcf_proto *tp, u32 flags)
398 const struct Qdisc *sch = tp->q;
399 const struct Qdisc_class_ops *cops = sch->ops->cl_ops;
401 if (!(dev->features & NETIF_F_HW_TC))
403 if (flags & TCA_CLS_FLAGS_SKIP_HW)
405 if (!dev->netdev_ops->ndo_setup_tc)
407 if (cops && cops->tcf_cl_offload)
408 return cops->tcf_cl_offload(tp->classid);
413 static inline bool tc_skip_sw(u32 flags)
415 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
418 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
419 static inline bool tc_flags_valid(u32 flags)
421 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
424 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
431 TC_CLSFLOWER_REPLACE,
432 TC_CLSFLOWER_DESTROY,
436 struct tc_cls_flower_offload {
437 enum tc_fl_command command;
438 unsigned long cookie;
439 struct flow_dissector *dissector;
440 struct fl_flow_key *mask;
441 struct fl_flow_key *key;
442 struct tcf_exts *exts;
445 enum tc_matchall_command {
446 TC_CLSMATCHALL_REPLACE,
447 TC_CLSMATCHALL_DESTROY,
450 struct tc_cls_matchall_offload {
451 enum tc_matchall_command command;
452 struct tcf_exts *exts;
453 unsigned long cookie;