1#ifndef __NET_PKT_CLS_H
2#define __NET_PKT_CLS_H
3
4#include <linux/pkt_cls.h>
5#include <net/sch_generic.h>
6#include <net/act_api.h>
7
8
9
10struct tcf_walker {
11 int stop;
12 int skip;
13 int count;
14 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
15};
16
17extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
19
20static inline unsigned long
21__cls_set_class(unsigned long *clp, unsigned long cl)
22{
23 unsigned long old_cl;
24
25 old_cl = *clp;
26 *clp = cl;
27 return old_cl;
28}
29
30static inline unsigned long
31cls_set_class(struct tcf_proto *tp, unsigned long *clp,
32 unsigned long cl)
33{
34 unsigned long old_cl;
35
36 tcf_tree_lock(tp);
37 old_cl = __cls_set_class(clp, cl);
38 tcf_tree_unlock(tp);
39
40 return old_cl;
41}
42
43static inline void
44tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
45{
46 unsigned long cl;
47
48 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
49 cl = cls_set_class(tp, &r->class, cl);
50 if (cl)
51 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
52}
53
54static inline void
55tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
56{
57 unsigned long cl;
58
59 if ((cl = __cls_set_class(&r->class, 0)) != 0)
60 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
61}
62
63struct tcf_exts {
64#ifdef CONFIG_NET_CLS_ACT
65 struct tc_action *action;
66#endif
67};
68
69
70
71
72struct tcf_ext_map {
73 int action;
74 int police;
75};
76
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80
81
82
83
84static inline int
85tcf_exts_is_predicative(struct tcf_exts *exts)
86{
87#ifdef CONFIG_NET_CLS_ACT
88 return !!exts->action;
89#else
90 return 0;
91#endif
92}
93
94
95
96
97
98
99
100static inline int
101tcf_exts_is_available(struct tcf_exts *exts)
102{
103
104 return tcf_exts_is_predicative(exts);
105}
106
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116
117
118static inline int
119tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
120 struct tcf_result *res)
121{
122#ifdef CONFIG_NET_CLS_ACT
123 if (exts->action)
124 return tcf_action_exec(skb, exts->action, res);
125#endif
126 return 0;
127}
128
129extern 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);
133extern void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
134extern void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
135 struct tcf_exts *src);
136extern int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts,
137 const struct tcf_ext_map *map);
138extern int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts,
139 const struct tcf_ext_map *map);
140
141
142
143
144struct tcf_pkt_info {
145 unsigned char * ptr;
146 int nexthdr;
147};
148
149#ifdef CONFIG_NET_EMATCH
150
151struct tcf_ematch_ops;
152
153
154
155
156
157
158
159
160
161
162struct tcf_ematch {
163 struct tcf_ematch_ops * ops;
164 unsigned long data;
165 unsigned int datalen;
166 u16 matchid;
167 u16 flags;
168};
169
170static inline int tcf_em_is_container(struct tcf_ematch *em)
171{
172 return !em->ops;
173}
174
175static inline int tcf_em_is_simple(struct tcf_ematch *em)
176{
177 return em->flags & TCF_EM_SIMPLE;
178}
179
180static inline int tcf_em_is_inverted(struct tcf_ematch *em)
181{
182 return em->flags & TCF_EM_INVERT;
183}
184
185static inline int tcf_em_last_match(struct tcf_ematch *em)
186{
187 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
188}
189
190static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
191{
192 if (tcf_em_last_match(em))
193 return 1;
194
195 if (result == 0 && em->flags & TCF_EM_REL_AND)
196 return 1;
197
198 if (result != 0 && em->flags & TCF_EM_REL_OR)
199 return 1;
200
201 return 0;
202}
203
204
205
206
207
208
209
210struct tcf_ematch_tree {
211 struct tcf_ematch_tree_hdr hdr;
212 struct tcf_ematch * matches;
213
214};
215
216
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225
226
227
228struct tcf_ematch_ops {
229 int kind;
230 int datalen;
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;
240};
241
242extern int tcf_em_register(struct tcf_ematch_ops *);
243extern void tcf_em_unregister(struct tcf_ematch_ops *);
244extern int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
245 struct tcf_ematch_tree *);
246extern void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
247extern int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
248extern int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
249 struct tcf_pkt_info *);
250
251
252
253
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259
260
261
262static inline void tcf_em_tree_change(struct tcf_proto *tp,
263 struct tcf_ematch_tree *dst,
264 struct tcf_ematch_tree *src)
265{
266 tcf_tree_lock(tp);
267 memcpy(dst, src, sizeof(*dst));
268 tcf_tree_unlock(tp);
269}
270
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282
283
284
285static inline int tcf_em_tree_match(struct sk_buff *skb,
286 struct tcf_ematch_tree *tree,
287 struct tcf_pkt_info *info)
288{
289 if (tree->hdr.nmatches)
290 return __tcf_em_tree_match(skb, tree, info);
291 else
292 return 1;
293}
294
295#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
296
297#else
298
299struct tcf_ematch_tree {
300};
301
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)
307
308#endif
309
310static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
311{
312 switch (layer) {
313 case TCF_LAYER_LINK:
314 return skb->data;
315 case TCF_LAYER_NETWORK:
316 return skb_network_header(skb);
317 case TCF_LAYER_TRANSPORT:
318 return skb_transport_header(skb);
319 }
320
321 return NULL;
322}
323
324static inline int tcf_valid_offset(const struct sk_buff *skb,
325 const unsigned char *ptr, const int len)
326{
327 return likely((ptr + len) <= skb_tail_pointer(skb) &&
328 ptr >= skb->head &&
329 (ptr <= (ptr + len)));
330}
331
332#ifdef CONFIG_NET_CLS_IND
333#include <net/net_namespace.h>
334
335static inline int
336tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv)
337{
338 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
339 return -EINVAL;
340 return 0;
341}
342
343static inline int
344tcf_match_indev(struct sk_buff *skb, char *indev)
345{
346 struct net_device *dev;
347
348 if (indev[0]) {
349 if (!skb->skb_iif)
350 return 0;
351 dev = __dev_get_by_index(dev_net(skb->dev), skb->skb_iif);
352 if (!dev || strcmp(indev, dev->name))
353 return 0;
354 }
355
356 return 1;
357}
358#endif
359
360#endif
361