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 return xchg(clp, cl);
24}
25
26static inline unsigned long
27cls_set_class(struct tcf_proto *tp, unsigned long *clp,
28 unsigned long cl)
29{
30 unsigned long old_cl;
31
32 tcf_tree_lock(tp);
33 old_cl = __cls_set_class(clp, cl);
34 tcf_tree_unlock(tp);
35
36 return old_cl;
37}
38
39static inline void
40tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
41{
42 unsigned long cl;
43
44 cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
45 cl = cls_set_class(tp, &r->class, cl);
46 if (cl)
47 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
48}
49
50static inline void
51tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
52{
53 unsigned long cl;
54
55 if ((cl = __cls_set_class(&r->class, 0)) != 0)
56 tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
57}
58
59struct tcf_exts {
60#ifdef CONFIG_NET_CLS_ACT
61 __u32 type;
62 int nr_actions;
63 struct tc_action **actions;
64#endif
65
66
67
68 int action;
69 int police;
70};
71
72static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
73{
74#ifdef CONFIG_NET_CLS_ACT
75 exts->type = 0;
76 exts->nr_actions = 0;
77 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
78 GFP_KERNEL);
79 if (!exts->actions)
80 return -ENOMEM;
81#endif
82 exts->action = action;
83 exts->police = police;
84 return 0;
85}
86
87
88
89
90
91
92
93
94static inline int
95tcf_exts_is_predicative(struct tcf_exts *exts)
96{
97#ifdef CONFIG_NET_CLS_ACT
98 return exts->nr_actions;
99#else
100 return 0;
101#endif
102}
103
104
105
106
107
108
109
110static inline int
111tcf_exts_is_available(struct tcf_exts *exts)
112{
113
114 return tcf_exts_is_predicative(exts);
115}
116
117static inline void tcf_exts_to_list(const struct tcf_exts *exts,
118 struct list_head *actions)
119{
120#ifdef CONFIG_NET_CLS_ACT
121 int i;
122
123 for (i = 0; i < exts->nr_actions; i++) {
124 struct tc_action *a = exts->actions[i];
125
126 list_add_tail(&a->list, actions);
127 }
128#endif
129}
130
131
132
133
134
135
136
137
138
139
140
141
142static inline int
143tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
144 struct tcf_result *res)
145{
146#ifdef CONFIG_NET_CLS_ACT
147 if (exts->nr_actions)
148 return tcf_action_exec(skb, exts->actions, exts->nr_actions,
149 res);
150#endif
151 return 0;
152}
153
154#ifdef CONFIG_NET_CLS_ACT
155
156#define tc_no_actions(_exts) ((_exts)->nr_actions == 0)
157#define tc_single_action(_exts) ((_exts)->nr_actions == 1)
158
159#else
160
161#define tc_no_actions(_exts) true
162#define tc_single_action(_exts) false
163
164#endif
165
166int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
167 struct nlattr **tb, struct nlattr *rate_tlv,
168 struct tcf_exts *exts, bool ovr);
169void tcf_exts_destroy(struct tcf_exts *exts);
170void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
171 struct tcf_exts *src);
172int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
173int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
174
175
176
177
178struct tcf_pkt_info {
179 unsigned char * ptr;
180 int nexthdr;
181};
182
183#ifdef CONFIG_NET_EMATCH
184
185struct tcf_ematch_ops;
186
187
188
189
190
191
192
193
194
195
196struct tcf_ematch {
197 struct tcf_ematch_ops * ops;
198 unsigned long data;
199 unsigned int datalen;
200 u16 matchid;
201 u16 flags;
202 struct net *net;
203};
204
205static inline int tcf_em_is_container(struct tcf_ematch *em)
206{
207 return !em->ops;
208}
209
210static inline int tcf_em_is_simple(struct tcf_ematch *em)
211{
212 return em->flags & TCF_EM_SIMPLE;
213}
214
215static inline int tcf_em_is_inverted(struct tcf_ematch *em)
216{
217 return em->flags & TCF_EM_INVERT;
218}
219
220static inline int tcf_em_last_match(struct tcf_ematch *em)
221{
222 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
223}
224
225static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
226{
227 if (tcf_em_last_match(em))
228 return 1;
229
230 if (result == 0 && em->flags & TCF_EM_REL_AND)
231 return 1;
232
233 if (result != 0 && em->flags & TCF_EM_REL_OR)
234 return 1;
235
236 return 0;
237}
238
239
240
241
242
243
244
245struct tcf_ematch_tree {
246 struct tcf_ematch_tree_hdr hdr;
247 struct tcf_ematch * matches;
248
249};
250
251
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259
260
261
262
263struct tcf_ematch_ops {
264 int kind;
265 int datalen;
266 int (*change)(struct net *net, void *,
267 int, struct tcf_ematch *);
268 int (*match)(struct sk_buff *, struct tcf_ematch *,
269 struct tcf_pkt_info *);
270 void (*destroy)(struct tcf_ematch *);
271 int (*dump)(struct sk_buff *, struct tcf_ematch *);
272 struct module *owner;
273 struct list_head link;
274};
275
276int tcf_em_register(struct tcf_ematch_ops *);
277void tcf_em_unregister(struct tcf_ematch_ops *);
278int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
279 struct tcf_ematch_tree *);
280void tcf_em_tree_destroy(struct tcf_ematch_tree *);
281int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
282int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
283 struct tcf_pkt_info *);
284
285
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293
294
295
296static inline void tcf_em_tree_change(struct tcf_proto *tp,
297 struct tcf_ematch_tree *dst,
298 struct tcf_ematch_tree *src)
299{
300 tcf_tree_lock(tp);
301 memcpy(dst, src, sizeof(*dst));
302 tcf_tree_unlock(tp);
303}
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319static inline int tcf_em_tree_match(struct sk_buff *skb,
320 struct tcf_ematch_tree *tree,
321 struct tcf_pkt_info *info)
322{
323 if (tree->hdr.nmatches)
324 return __tcf_em_tree_match(skb, tree, info);
325 else
326 return 1;
327}
328
329#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
330
331#else
332
333struct tcf_ematch_tree {
334};
335
336#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
337#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
338#define tcf_em_tree_dump(skb, t, tlv) (0)
339#define tcf_em_tree_change(tp, dst, src) do { } while(0)
340#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
341
342#endif
343
344static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
345{
346 switch (layer) {
347 case TCF_LAYER_LINK:
348 return skb->data;
349 case TCF_LAYER_NETWORK:
350 return skb_network_header(skb);
351 case TCF_LAYER_TRANSPORT:
352 return skb_transport_header(skb);
353 }
354
355 return NULL;
356}
357
358static inline int tcf_valid_offset(const struct sk_buff *skb,
359 const unsigned char *ptr, const int len)
360{
361 return likely((ptr + len) <= skb_tail_pointer(skb) &&
362 ptr >= skb->head &&
363 (ptr <= (ptr + len)));
364}
365
366#ifdef CONFIG_NET_CLS_IND
367#include <net/net_namespace.h>
368
369static inline int
370tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
371{
372 char indev[IFNAMSIZ];
373 struct net_device *dev;
374
375 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
376 return -EINVAL;
377 dev = __dev_get_by_name(net, indev);
378 if (!dev)
379 return -ENODEV;
380 return dev->ifindex;
381}
382
383static inline bool
384tcf_match_indev(struct sk_buff *skb, int ifindex)
385{
386 if (!ifindex)
387 return true;
388 if (!skb->skb_iif)
389 return false;
390 return ifindex == skb->skb_iif;
391}
392#endif
393
394struct tc_cls_u32_knode {
395 struct tcf_exts *exts;
396 struct tc_u32_sel *sel;
397 u32 handle;
398 u32 val;
399 u32 mask;
400 u32 link_handle;
401 u8 fshift;
402};
403
404struct tc_cls_u32_hnode {
405 u32 handle;
406 u32 prio;
407 unsigned int divisor;
408};
409
410enum tc_clsu32_command {
411 TC_CLSU32_NEW_KNODE,
412 TC_CLSU32_REPLACE_KNODE,
413 TC_CLSU32_DELETE_KNODE,
414 TC_CLSU32_NEW_HNODE,
415 TC_CLSU32_REPLACE_HNODE,
416 TC_CLSU32_DELETE_HNODE,
417};
418
419struct tc_cls_u32_offload {
420
421 enum tc_clsu32_command command;
422 union {
423 struct tc_cls_u32_knode knode;
424 struct tc_cls_u32_hnode hnode;
425 };
426};
427
428static inline bool tc_should_offload(const struct net_device *dev,
429 const struct tcf_proto *tp, u32 flags)
430{
431 const struct Qdisc *sch = tp->q;
432 const struct Qdisc_class_ops *cops = sch->ops->cl_ops;
433
434 if (!(dev->features & NETIF_F_HW_TC))
435 return false;
436 if (flags & TCA_CLS_FLAGS_SKIP_HW)
437 return false;
438 if (!dev->netdev_ops->ndo_setup_tc)
439 return false;
440 if (cops && cops->tcf_cl_offload)
441 return cops->tcf_cl_offload(tp->classid);
442
443 return true;
444}
445
446static inline bool tc_skip_sw(u32 flags)
447{
448 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
449}
450
451
452static inline bool tc_flags_valid(u32 flags)
453{
454 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
455 return false;
456
457 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
458 return false;
459
460 return true;
461}
462
463enum tc_fl_command {
464 TC_CLSFLOWER_REPLACE,
465 TC_CLSFLOWER_DESTROY,
466 TC_CLSFLOWER_STATS,
467};
468
469struct tc_cls_flower_offload {
470 enum tc_fl_command command;
471 unsigned long cookie;
472 struct flow_dissector *dissector;
473 struct fl_flow_key *mask;
474 struct fl_flow_key *key;
475 struct tcf_exts *exts;
476};
477
478enum tc_matchall_command {
479 TC_CLSMATCHALL_REPLACE,
480 TC_CLSMATCHALL_DESTROY,
481};
482
483struct tc_cls_matchall_offload {
484 enum tc_matchall_command command;
485 struct tcf_exts *exts;
486 unsigned long cookie;
487};
488
489enum tc_clsbpf_command {
490 TC_CLSBPF_ADD,
491 TC_CLSBPF_REPLACE,
492 TC_CLSBPF_DESTROY,
493 TC_CLSBPF_STATS,
494};
495
496struct tc_cls_bpf_offload {
497 enum tc_clsbpf_command command;
498 struct tcf_exts *exts;
499 struct bpf_prog *prog;
500 const char *name;
501 bool exts_integrated;
502 u32 gen_flags;
503};
504
505#endif
506