ALSA: hda - Fix mute control with some ALC262 models
[linux-2.6/mini2440.git] / include / net / pkt_cls.h
blobd1ca3144464438f6ba1dc442ec36315d6f7e195f
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. */
10 struct tcf_walker
12 int stop;
13 int skip;
14 int count;
15 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
18 extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
19 extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
21 static inline unsigned long
22 __cls_set_class(unsigned long *clp, unsigned long cl)
24 unsigned long old_cl;
26 old_cl = *clp;
27 *clp = cl;
28 return old_cl;
31 static inline unsigned long
32 cls_set_class(struct tcf_proto *tp, unsigned long *clp,
33 unsigned long cl)
35 unsigned long old_cl;
37 tcf_tree_lock(tp);
38 old_cl = __cls_set_class(clp, cl);
39 tcf_tree_unlock(tp);
41 return old_cl;
44 static inline void
45 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
47 unsigned long cl;
49 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
50 cl = cls_set_class(tp, &r->class, cl);
51 if (cl)
52 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
55 static inline void
56 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
58 unsigned long cl;
60 if ((cl = __cls_set_class(&r->class, 0)) != 0)
61 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
64 struct tcf_exts
66 #ifdef CONFIG_NET_CLS_ACT
67 struct tc_action *action;
68 #endif
71 /* Map to export classifier specific extension TLV types to the
72 * generic extensions API. Unsupported extensions must be set to 0.
74 struct tcf_ext_map
76 int action;
77 int police;
80 /**
81 * tcf_exts_is_predicative - check if a predicative extension is present
82 * @exts: tc filter extensions handle
84 * Returns 1 if a predicative extension is present, i.e. an extension which
85 * might cause further actions and thus overrule the regular tcf_result.
87 static inline int
88 tcf_exts_is_predicative(struct tcf_exts *exts)
90 #ifdef CONFIG_NET_CLS_ACT
91 return !!exts->action;
92 #else
93 return 0;
94 #endif
97 /**
98 * tcf_exts_is_available - check if at least one extension is present
99 * @exts: tc filter extensions handle
101 * Returns 1 if at least one extension is present.
103 static inline int
104 tcf_exts_is_available(struct tcf_exts *exts)
106 /* All non-predicative extensions must be added here. */
107 return tcf_exts_is_predicative(exts);
111 * tcf_exts_exec - execute tc filter extensions
112 * @skb: socket buffer
113 * @exts: tc filter extensions handle
114 * @res: desired result
116 * Executes all configured extensions. Returns 0 on a normal execution,
117 * a negative number if the filter must be considered unmatched or
118 * a positive action code (TC_ACT_*) which must be returned to the
119 * underlying layer.
121 static inline int
122 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
123 struct tcf_result *res)
125 #ifdef CONFIG_NET_CLS_ACT
126 if (exts->action)
127 return tcf_action_exec(skb, exts->action, res);
128 #endif
129 return 0;
132 extern int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb,
133 struct nlattr *rate_tlv, struct tcf_exts *exts,
134 const struct tcf_ext_map *map);
135 extern void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
136 extern void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
137 struct tcf_exts *src);
138 extern int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts,
139 const struct tcf_ext_map *map);
140 extern int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts,
141 const struct tcf_ext_map *map);
144 * struct tcf_pkt_info - packet information
146 struct tcf_pkt_info
148 unsigned char * ptr;
149 int nexthdr;
152 #ifdef CONFIG_NET_EMATCH
154 struct tcf_ematch_ops;
157 * struct tcf_ematch - extended match (ematch)
159 * @matchid: identifier to allow userspace to reidentify a match
160 * @flags: flags specifying attributes and the relation to other matches
161 * @ops: the operations lookup table of the corresponding ematch module
162 * @datalen: length of the ematch specific configuration data
163 * @data: ematch specific data
165 struct tcf_ematch
167 struct tcf_ematch_ops * ops;
168 unsigned long data;
169 unsigned int datalen;
170 u16 matchid;
171 u16 flags;
174 static inline int tcf_em_is_container(struct tcf_ematch *em)
176 return !em->ops;
179 static inline int tcf_em_is_simple(struct tcf_ematch *em)
181 return em->flags & TCF_EM_SIMPLE;
184 static inline int tcf_em_is_inverted(struct tcf_ematch *em)
186 return em->flags & TCF_EM_INVERT;
189 static inline int tcf_em_last_match(struct tcf_ematch *em)
191 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
194 static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
196 if (tcf_em_last_match(em))
197 return 1;
199 if (result == 0 && em->flags & TCF_EM_REL_AND)
200 return 1;
202 if (result != 0 && em->flags & TCF_EM_REL_OR)
203 return 1;
205 return 0;
209 * struct tcf_ematch_tree - ematch tree handle
211 * @hdr: ematch tree header supplied by userspace
212 * @matches: array of ematches
214 struct tcf_ematch_tree
216 struct tcf_ematch_tree_hdr hdr;
217 struct tcf_ematch * matches;
222 * struct tcf_ematch_ops - ematch module operations
224 * @kind: identifier (kind) of this ematch module
225 * @datalen: length of expected configuration data (optional)
226 * @change: called during validation (optional)
227 * @match: called during ematch tree evaluation, must return 1/0
228 * @destroy: called during destroyage (optional)
229 * @dump: called during dumping process (optional)
230 * @owner: owner, must be set to THIS_MODULE
231 * @link: link to previous/next ematch module (internal use)
233 struct tcf_ematch_ops
235 int kind;
236 int datalen;
237 int (*change)(struct tcf_proto *, void *,
238 int, struct tcf_ematch *);
239 int (*match)(struct sk_buff *, struct tcf_ematch *,
240 struct tcf_pkt_info *);
241 void (*destroy)(struct tcf_proto *,
242 struct tcf_ematch *);
243 int (*dump)(struct sk_buff *, struct tcf_ematch *);
244 struct module *owner;
245 struct list_head link;
248 extern int tcf_em_register(struct tcf_ematch_ops *);
249 extern void tcf_em_unregister(struct tcf_ematch_ops *);
250 extern int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
251 struct tcf_ematch_tree *);
252 extern void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
253 extern int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
254 extern int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
255 struct tcf_pkt_info *);
258 * tcf_em_tree_change - replace ematch tree of a running classifier
260 * @tp: classifier kind handle
261 * @dst: destination ematch tree variable
262 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
264 * This functions replaces the ematch tree in @dst with the ematch
265 * tree in @src. The classifier in charge of the ematch tree may be
266 * running.
268 static inline void tcf_em_tree_change(struct tcf_proto *tp,
269 struct tcf_ematch_tree *dst,
270 struct tcf_ematch_tree *src)
272 tcf_tree_lock(tp);
273 memcpy(dst, src, sizeof(*dst));
274 tcf_tree_unlock(tp);
278 * tcf_em_tree_match - evaulate an ematch tree
280 * @skb: socket buffer of the packet in question
281 * @tree: ematch tree to be used for evaluation
282 * @info: packet information examined by classifier
284 * This function matches @skb against the ematch tree in @tree by going
285 * through all ematches respecting their logic relations returning
286 * as soon as the result is obvious.
288 * Returns 1 if the ematch tree as-one matches, no ematches are configured
289 * or ematch is not enabled in the kernel, otherwise 0 is returned.
291 static inline int tcf_em_tree_match(struct sk_buff *skb,
292 struct tcf_ematch_tree *tree,
293 struct tcf_pkt_info *info)
295 if (tree->hdr.nmatches)
296 return __tcf_em_tree_match(skb, tree, info);
297 else
298 return 1;
301 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
303 #else /* CONFIG_NET_EMATCH */
305 struct tcf_ematch_tree
309 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
310 #define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
311 #define tcf_em_tree_dump(skb, t, tlv) (0)
312 #define tcf_em_tree_change(tp, dst, src) do { } while(0)
313 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
315 #endif /* CONFIG_NET_EMATCH */
317 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
319 switch (layer) {
320 case TCF_LAYER_LINK:
321 return skb->data;
322 case TCF_LAYER_NETWORK:
323 return skb_network_header(skb);
324 case TCF_LAYER_TRANSPORT:
325 return skb_transport_header(skb);
328 return NULL;
331 static inline int tcf_valid_offset(const struct sk_buff *skb,
332 const unsigned char *ptr, const int len)
334 return unlikely((ptr + len) < skb_tail_pointer(skb) && ptr > skb->head);
337 #ifdef CONFIG_NET_CLS_IND
338 #include <net/net_namespace.h>
340 static inline int
341 tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv)
343 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
344 return -EINVAL;
345 return 0;
348 static inline int
349 tcf_match_indev(struct sk_buff *skb, char *indev)
351 struct net_device *dev;
353 if (indev[0]) {
354 if (!skb->iif)
355 return 0;
356 dev = __dev_get_by_index(dev_net(skb->dev), skb->iif);
357 if (!dev || strcmp(indev, dev->name))
358 return 0;
361 return 1;
363 #endif /* CONFIG_NET_CLS_IND */
365 #endif