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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/net/pkt_cls.h
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
)
30 static inline unsigned long
31 cls_set_class(struct tcf_proto
*tp
, unsigned long *clp
,
37 old_cl
= __cls_set_class(clp
, cl
);
44 tcf_bind_filter(struct tcf_proto
*tp
, struct tcf_result
*r
, unsigned long base
)
48 cl
= tp
->q
->ops
->cl_ops
->bind_tcf(tp
->q
, base
, r
->classid
);
49 cl
= cls_set_class(tp
, &r
->class, cl
);
51 tp
->q
->ops
->cl_ops
->unbind_tcf(tp
->q
, cl
);
55 tcf_unbind_filter(struct tcf_proto
*tp
, struct tcf_result
*r
)
59 if ((cl
= __cls_set_class(&r
->class, 0)) != 0)
60 tp
->q
->ops
->cl_ops
->unbind_tcf(tp
->q
, cl
);
64 #ifdef CONFIG_NET_CLS_ACT
65 struct tc_action
*action
;
69 /* Map to export classifier specific extension TLV types to the
70 * generic extensions API. Unsupported extensions must be set to 0.
78 * tcf_exts_is_predicative - check if a predicative extension is present
79 * @exts: tc filter extensions handle
81 * Returns 1 if a predicative extension is present, i.e. an extension which
82 * might cause further actions and thus overrule the regular tcf_result.
85 tcf_exts_is_predicative(struct tcf_exts
*exts
)
87 #ifdef CONFIG_NET_CLS_ACT
88 return !!exts
->action
;
95 * tcf_exts_is_available - check if at least one extension is present
96 * @exts: tc filter extensions handle
98 * Returns 1 if at least one extension is present.
101 tcf_exts_is_available(struct tcf_exts
*exts
)
103 /* All non-predicative extensions must be added here. */
104 return tcf_exts_is_predicative(exts
);
108 * tcf_exts_exec - execute tc filter extensions
109 * @skb: socket buffer
110 * @exts: tc filter extensions handle
111 * @res: desired result
113 * Executes all configured extensions. Returns 0 on a normal execution,
114 * a negative number if the filter must be considered unmatched or
115 * a positive action code (TC_ACT_*) which must be returned to the
119 tcf_exts_exec(struct sk_buff
*skb
, struct tcf_exts
*exts
,
120 struct tcf_result
*res
)
122 #ifdef CONFIG_NET_CLS_ACT
124 return tcf_action_exec(skb
, exts
->action
, res
);
129 int tcf_exts_validate(struct net
*net
, struct tcf_proto
*tp
,
130 struct nlattr
**tb
, struct nlattr
*rate_tlv
,
131 struct tcf_exts
*exts
,
132 const struct tcf_ext_map
*map
);
133 void tcf_exts_destroy(struct tcf_proto
*tp
, struct tcf_exts
*exts
);
134 void tcf_exts_change(struct tcf_proto
*tp
, struct tcf_exts
*dst
,
135 struct tcf_exts
*src
);
136 int tcf_exts_dump(struct sk_buff
*skb
, struct tcf_exts
*exts
,
137 const struct tcf_ext_map
*map
);
138 int tcf_exts_dump_stats(struct sk_buff
*skb
, struct tcf_exts
*exts
,
139 const struct tcf_ext_map
*map
);
142 * struct tcf_pkt_info - packet information
144 struct tcf_pkt_info
{
149 #ifdef CONFIG_NET_EMATCH
151 struct tcf_ematch_ops
;
154 * struct tcf_ematch - extended match (ematch)
156 * @matchid: identifier to allow userspace to reidentify a match
157 * @flags: flags specifying attributes and the relation to other matches
158 * @ops: the operations lookup table of the corresponding ematch module
159 * @datalen: length of the ematch specific configuration data
160 * @data: ematch specific data
163 struct tcf_ematch_ops
* ops
;
165 unsigned int datalen
;
170 static inline int tcf_em_is_container(struct tcf_ematch
*em
)
175 static inline int tcf_em_is_simple(struct tcf_ematch
*em
)
177 return em
->flags
& TCF_EM_SIMPLE
;
180 static inline int tcf_em_is_inverted(struct tcf_ematch
*em
)
182 return em
->flags
& TCF_EM_INVERT
;
185 static inline int tcf_em_last_match(struct tcf_ematch
*em
)
187 return (em
->flags
& TCF_EM_REL_MASK
) == TCF_EM_REL_END
;
190 static inline int tcf_em_early_end(struct tcf_ematch
*em
, int result
)
192 if (tcf_em_last_match(em
))
195 if (result
== 0 && em
->flags
& TCF_EM_REL_AND
)
198 if (result
!= 0 && em
->flags
& TCF_EM_REL_OR
)
205 * struct tcf_ematch_tree - ematch tree handle
207 * @hdr: ematch tree header supplied by userspace
208 * @matches: array of ematches
210 struct tcf_ematch_tree
{
211 struct tcf_ematch_tree_hdr hdr
;
212 struct tcf_ematch
* matches
;
217 * struct tcf_ematch_ops - ematch module operations
219 * @kind: identifier (kind) of this ematch module
220 * @datalen: length of expected configuration data (optional)
221 * @change: called during validation (optional)
222 * @match: called during ematch tree evaluation, must return 1/0
223 * @destroy: called during destroyage (optional)
224 * @dump: called during dumping process (optional)
225 * @owner: owner, must be set to THIS_MODULE
226 * @link: link to previous/next ematch module (internal use)
228 struct tcf_ematch_ops
{
231 int (*change
)(struct tcf_proto
*, void *,
232 int, struct tcf_ematch
*);
233 int (*match
)(struct sk_buff
*, struct tcf_ematch
*,
234 struct tcf_pkt_info
*);
235 void (*destroy
)(struct tcf_proto
*,
236 struct tcf_ematch
*);
237 int (*dump
)(struct sk_buff
*, struct tcf_ematch
*);
238 struct module
*owner
;
239 struct list_head link
;
242 int tcf_em_register(struct tcf_ematch_ops
*);
243 void tcf_em_unregister(struct tcf_ematch_ops
*);
244 int tcf_em_tree_validate(struct tcf_proto
*, struct nlattr
*,
245 struct tcf_ematch_tree
*);
246 void tcf_em_tree_destroy(struct tcf_proto
*, struct tcf_ematch_tree
*);
247 int tcf_em_tree_dump(struct sk_buff
*, struct tcf_ematch_tree
*, int);
248 int __tcf_em_tree_match(struct sk_buff
*, struct tcf_ematch_tree
*,
249 struct tcf_pkt_info
*);
252 * tcf_em_tree_change - replace ematch tree of a running classifier
254 * @tp: classifier kind handle
255 * @dst: destination ematch tree variable
256 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
258 * This functions replaces the ematch tree in @dst with the ematch
259 * tree in @src. The classifier in charge of the ematch tree may be
262 static inline void tcf_em_tree_change(struct tcf_proto
*tp
,
263 struct tcf_ematch_tree
*dst
,
264 struct tcf_ematch_tree
*src
)
267 memcpy(dst
, src
, sizeof(*dst
));
272 * tcf_em_tree_match - evaulate an ematch tree
274 * @skb: socket buffer of the packet in question
275 * @tree: ematch tree to be used for evaluation
276 * @info: packet information examined by classifier
278 * This function matches @skb against the ematch tree in @tree by going
279 * through all ematches respecting their logic relations returning
280 * as soon as the result is obvious.
282 * Returns 1 if the ematch tree as-one matches, no ematches are configured
283 * or ematch is not enabled in the kernel, otherwise 0 is returned.
285 static inline int tcf_em_tree_match(struct sk_buff
*skb
,
286 struct tcf_ematch_tree
*tree
,
287 struct tcf_pkt_info
*info
)
289 if (tree
->hdr
.nmatches
)
290 return __tcf_em_tree_match(skb
, tree
, info
);
295 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
297 #else /* CONFIG_NET_EMATCH */
299 struct tcf_ematch_tree
{
302 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
303 #define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
304 #define tcf_em_tree_dump(skb, t, tlv) (0)
305 #define tcf_em_tree_change(tp, dst, src) do { } while(0)
306 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
308 #endif /* CONFIG_NET_EMATCH */
310 static inline unsigned char * tcf_get_base_ptr(struct sk_buff
*skb
, int layer
)
315 case TCF_LAYER_NETWORK
:
316 return skb_network_header(skb
);
317 case TCF_LAYER_TRANSPORT
:
318 return skb_transport_header(skb
);
324 static inline int tcf_valid_offset(const struct sk_buff
*skb
,
325 const unsigned char *ptr
, const int len
)
327 return likely((ptr
+ len
) <= skb_tail_pointer(skb
) &&
329 (ptr
<= (ptr
+ len
)));
332 #ifdef CONFIG_NET_CLS_IND
333 #include <net/net_namespace.h>
336 tcf_change_indev(struct tcf_proto
*tp
, char *indev
, struct nlattr
*indev_tlv
)
338 if (nla_strlcpy(indev
, indev_tlv
, IFNAMSIZ
) >= IFNAMSIZ
)
344 tcf_match_indev(struct sk_buff
*skb
, char *indev
)
346 struct net_device
*dev
;
351 dev
= __dev_get_by_index(dev_net(skb
->dev
), skb
->skb_iif
);
352 if (!dev
|| strcmp(indev
, dev
->name
))
358 #endif /* CONFIG_NET_CLS_IND */