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
17int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18int 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 __u32 type;
66 struct list_head actions;
67#endif
68
69
70
71 int action;
72 int police;
73};
74
75static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
76{
77#ifdef CONFIG_NET_CLS_ACT
78 exts->type = 0;
79 INIT_LIST_HEAD(&exts->actions);
80#endif
81 exts->action = action;
82 exts->police = police;
83}
84
85
86
87
88
89
90
91
92static inline int
93tcf_exts_is_predicative(struct tcf_exts *exts)
94{
95#ifdef CONFIG_NET_CLS_ACT
96 return !list_empty(&exts->actions);
97#else
98 return 0;
99#endif
100}
101
102
103
104
105
106
107
108static inline int
109tcf_exts_is_available(struct tcf_exts *exts)
110{
111
112 return tcf_exts_is_predicative(exts);
113}
114
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124
125
126static inline int
127tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
128 struct tcf_result *res)
129{
130#ifdef CONFIG_NET_CLS_ACT
131 if (!list_empty(&exts->actions))
132 return tcf_action_exec(skb, &exts->actions, res);
133#endif
134 return 0;
135}
136
137int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
138 struct nlattr **tb, struct nlattr *rate_tlv,
139 struct tcf_exts *exts, bool ovr);
140void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
141void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
142 struct tcf_exts *src);
143int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
144int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
145
146
147
148
149struct tcf_pkt_info {
150 unsigned char * ptr;
151 int nexthdr;
152};
153
154#ifdef CONFIG_NET_EMATCH
155
156struct tcf_ematch_ops;
157
158
159
160
161
162
163
164
165
166
167struct tcf_ematch {
168 struct tcf_ematch_ops * ops;
169 unsigned long data;
170 unsigned int datalen;
171 u16 matchid;
172 u16 flags;
173};
174
175static inline int tcf_em_is_container(struct tcf_ematch *em)
176{
177 return !em->ops;
178}
179
180static inline int tcf_em_is_simple(struct tcf_ematch *em)
181{
182 return em->flags & TCF_EM_SIMPLE;
183}
184
185static inline int tcf_em_is_inverted(struct tcf_ematch *em)
186{
187 return em->flags & TCF_EM_INVERT;
188}
189
190static inline int tcf_em_last_match(struct tcf_ematch *em)
191{
192 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
193}
194
195static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
196{
197 if (tcf_em_last_match(em))
198 return 1;
199
200 if (result == 0 && em->flags & TCF_EM_REL_AND)
201 return 1;
202
203 if (result != 0 && em->flags & TCF_EM_REL_OR)
204 return 1;
205
206 return 0;
207}
208
209
210
211
212
213
214
215struct tcf_ematch_tree {
216 struct tcf_ematch_tree_hdr hdr;
217 struct tcf_ematch * matches;
218
219};
220
221
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230
231
232
233struct tcf_ematch_ops {
234 int kind;
235 int datalen;
236 int (*change)(struct tcf_proto *, void *,
237 int, struct tcf_ematch *);
238 int (*match)(struct sk_buff *, struct tcf_ematch *,
239 struct tcf_pkt_info *);
240 void (*destroy)(struct tcf_proto *,
241 struct tcf_ematch *);
242 int (*dump)(struct sk_buff *, struct tcf_ematch *);
243 struct module *owner;
244 struct list_head link;
245};
246
247int tcf_em_register(struct tcf_ematch_ops *);
248void tcf_em_unregister(struct tcf_ematch_ops *);
249int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
250 struct tcf_ematch_tree *);
251void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
252int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
253int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
254 struct tcf_pkt_info *);
255
256
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264
265
266
267static inline void tcf_em_tree_change(struct tcf_proto *tp,
268 struct tcf_ematch_tree *dst,
269 struct tcf_ematch_tree *src)
270{
271 tcf_tree_lock(tp);
272 memcpy(dst, src, sizeof(*dst));
273 tcf_tree_unlock(tp);
274}
275
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288
289
290static inline int tcf_em_tree_match(struct sk_buff *skb,
291 struct tcf_ematch_tree *tree,
292 struct tcf_pkt_info *info)
293{
294 if (tree->hdr.nmatches)
295 return __tcf_em_tree_match(skb, tree, info);
296 else
297 return 1;
298}
299
300#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
301
302#else
303
304struct tcf_ematch_tree {
305};
306
307#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
308#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
309#define tcf_em_tree_dump(skb, t, tlv) (0)
310#define tcf_em_tree_change(tp, dst, src) do { } while(0)
311#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
312
313#endif
314
315static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
316{
317 switch (layer) {
318 case TCF_LAYER_LINK:
319 return skb->data;
320 case TCF_LAYER_NETWORK:
321 return skb_network_header(skb);
322 case TCF_LAYER_TRANSPORT:
323 return skb_transport_header(skb);
324 }
325
326 return NULL;
327}
328
329static inline int tcf_valid_offset(const struct sk_buff *skb,
330 const unsigned char *ptr, const int len)
331{
332 return likely((ptr + len) <= skb_tail_pointer(skb) &&
333 ptr >= skb->head &&
334 (ptr <= (ptr + len)));
335}
336
337#ifdef CONFIG_NET_CLS_IND
338#include <net/net_namespace.h>
339
340static inline int
341tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
342{
343 char indev[IFNAMSIZ];
344 struct net_device *dev;
345
346 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
347 return -EINVAL;
348 dev = __dev_get_by_name(net, indev);
349 if (!dev)
350 return -ENODEV;
351 return dev->ifindex;
352}
353
354static inline bool
355tcf_match_indev(struct sk_buff *skb, int ifindex)
356{
357 if (!ifindex)
358 return true;
359 if (!skb->skb_iif)
360 return false;
361 return ifindex == skb->skb_iif;
362}
363#endif
364
365#endif
366