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{
12 int stop;
13 int skip;
14 int count;
15 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
16};
17
18extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
19extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
20
21static inline unsigned long
22__cls_set_class(unsigned long *clp, unsigned long cl)
23{
24 unsigned long old_cl;
25
26 old_cl = *clp;
27 *clp = cl;
28 return old_cl;
29}
30
31static inline unsigned long
32cls_set_class(struct tcf_proto *tp, unsigned long *clp,
33 unsigned long cl)
34{
35 unsigned long old_cl;
36
37 tcf_tree_lock(tp);
38 old_cl = __cls_set_class(clp, cl);
39 tcf_tree_unlock(tp);
40
41 return old_cl;
42}
43
44static inline void
45tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
46{
47 unsigned long cl;
48
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);
53}
54
55static inline void
56tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
57{
58 unsigned long cl;
59
60 if ((cl = __cls_set_class(&r->class, 0)) != 0)
61 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
62}
63
64struct tcf_exts
65{
66#ifdef CONFIG_NET_CLS_ACT
67 struct tc_action *action;
68#endif
69};
70
71
72
73
74struct tcf_ext_map
75{
76 int action;
77 int police;
78};
79
80
81
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83
84
85
86
87static inline int
88tcf_exts_is_predicative(struct tcf_exts *exts)
89{
90#ifdef CONFIG_NET_CLS_ACT
91 return !!exts->action;
92#else
93 return 0;
94#endif
95}
96
97
98
99
100
101
102
103static inline int
104tcf_exts_is_available(struct tcf_exts *exts)
105{
106
107 return tcf_exts_is_predicative(exts);
108}
109
110
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118
119
120
121static inline int
122tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
123 struct tcf_result *res)
124{
125#ifdef CONFIG_NET_CLS_ACT
126 if (exts->action)
127 return tcf_action_exec(skb, exts->action, res);
128#endif
129 return 0;
130}
131
132extern 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);
135extern void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
136extern void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
137 struct tcf_exts *src);
138extern int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts,
139 const struct tcf_ext_map *map);
140extern int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts,
141 const struct tcf_ext_map *map);
142
143
144
145
146struct tcf_pkt_info
147{
148 unsigned char * ptr;
149 int nexthdr;
150};
151
152#ifdef CONFIG_NET_EMATCH
153
154struct tcf_ematch_ops;
155
156
157
158
159
160
161
162
163
164
165struct tcf_ematch
166{
167 struct tcf_ematch_ops * ops;
168 unsigned long data;
169 unsigned int datalen;
170 u16 matchid;
171 u16 flags;
172};
173
174static inline int tcf_em_is_container(struct tcf_ematch *em)
175{
176 return !em->ops;
177}
178
179static inline int tcf_em_is_simple(struct tcf_ematch *em)
180{
181 return em->flags & TCF_EM_SIMPLE;
182}
183
184static inline int tcf_em_is_inverted(struct tcf_ematch *em)
185{
186 return em->flags & TCF_EM_INVERT;
187}
188
189static inline int tcf_em_last_match(struct tcf_ematch *em)
190{
191 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
192}
193
194static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
195{
196 if (tcf_em_last_match(em))
197 return 1;
198
199 if (result == 0 && em->flags & TCF_EM_REL_AND)
200 return 1;
201
202 if (result != 0 && em->flags & TCF_EM_REL_OR)
203 return 1;
204
205 return 0;
206}
207
208
209
210
211
212
213
214struct tcf_ematch_tree
215{
216 struct tcf_ematch_tree_hdr hdr;
217 struct tcf_ematch * matches;
218
219};
220
221
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224
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228
229
230
231
232
233struct tcf_ematch_ops
234{
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;
246};
247
248extern int tcf_em_register(struct tcf_ematch_ops *);
249extern void tcf_em_unregister(struct tcf_ematch_ops *);
250extern int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
251 struct tcf_ematch_tree *);
252extern void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
253extern int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
254extern int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
255 struct tcf_pkt_info *);
256
257
258
259
260
261
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264
265
266
267
268static inline void tcf_em_tree_change(struct tcf_proto *tp,
269 struct tcf_ematch_tree *dst,
270 struct tcf_ematch_tree *src)
271{
272 tcf_tree_lock(tp);
273 memcpy(dst, src, sizeof(*dst));
274 tcf_tree_unlock(tp);
275}
276
277
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289
290
291static inline int tcf_em_tree_match(struct sk_buff *skb,
292 struct tcf_ematch_tree *tree,
293 struct tcf_pkt_info *info)
294{
295 if (tree->hdr.nmatches)
296 return __tcf_em_tree_match(skb, tree, info);
297 else
298 return 1;
299}
300
301#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
302
303#else
304
305struct tcf_ematch_tree
306{
307};
308
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)
314
315#endif
316
317static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
318{
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);
326 }
327
328 return NULL;
329}
330
331static inline int tcf_valid_offset(const struct sk_buff *skb,
332 const unsigned char *ptr, const int len)
333{
334 return unlikely((ptr + len) < skb_tail_pointer(skb) && ptr > skb->head);
335}
336
337#ifdef CONFIG_NET_CLS_IND
338#include <net/net_namespace.h>
339
340static inline int
341tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv)
342{
343 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
344 return -EINVAL;
345 return 0;
346}
347
348static inline int
349tcf_match_indev(struct sk_buff *skb, char *indev)
350{
351 struct net_device *dev;
352
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;
359 }
360
361 return 1;
362}
363#endif
364
365#endif
366