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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/* Basic packet classifier frontend definitions. */
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; /* for backward compat(TCA_OLD_COMPAT) */
62 struct list_head actions;
63#endif
64 /* Map to export classifier specific extension TLV types to the
65 * generic extensions API. Unsupported extensions must be set to 0.
66 */
67 int action;
68 int police;
69};
70
71static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
72{
73#ifdef CONFIG_NET_CLS_ACT
74 exts->type = 0;
75 INIT_LIST_HEAD(&exts->actions);
76#endif
77 exts->action = action;
78 exts->police = police;
79}
80
81/**
82 * tcf_exts_is_predicative - check if a predicative extension is present
83 * @exts: tc filter extensions handle
84 *
85 * Returns 1 if a predicative extension is present, i.e. an extension which
86 * might cause further actions and thus overrule the regular tcf_result.
87 */
88static inline int
89tcf_exts_is_predicative(struct tcf_exts *exts)
90{
91#ifdef CONFIG_NET_CLS_ACT
92 return !list_empty(&exts->actions);
93#else
94 return 0;
95#endif
96}
97
98/**
99 * tcf_exts_is_available - check if at least one extension is present
100 * @exts: tc filter extensions handle
101 *
102 * Returns 1 if at least one extension is present.
103 */
104static inline int
105tcf_exts_is_available(struct tcf_exts *exts)
106{
107 /* All non-predicative extensions must be added here. */
108 return tcf_exts_is_predicative(exts);
109}
110
111/**
112 * tcf_exts_exec - execute tc filter extensions
113 * @skb: socket buffer
114 * @exts: tc filter extensions handle
115 * @res: desired result
116 *
117 * Executes all configured extensions. Returns 0 on a normal execution,
118 * a negative number if the filter must be considered unmatched or
119 * a positive action code (TC_ACT_*) which must be returned to the
120 * underlying layer.
121 */
122static inline int
123tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
124 struct tcf_result *res)
125{
126#ifdef CONFIG_NET_CLS_ACT
127 if (!list_empty(&exts->actions))
128 return tcf_action_exec(skb, &exts->actions, res);
129#endif
130 return 0;
131}
132
133int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
134 struct nlattr **tb, struct nlattr *rate_tlv,
135 struct tcf_exts *exts, bool ovr);
136void tcf_exts_destroy(struct tcf_exts *exts);
137void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
138 struct tcf_exts *src);
139int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
140int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
141
142/**
143 * struct tcf_pkt_info - packet information
144 */
145struct tcf_pkt_info {
146 unsigned char * ptr;
147 int nexthdr;
148};
149
150#ifdef CONFIG_NET_EMATCH
151
152struct tcf_ematch_ops;
153
154/**
155 * struct tcf_ematch - extended match (ematch)
156 *
157 * @matchid: identifier to allow userspace to reidentify a match
158 * @flags: flags specifying attributes and the relation to other matches
159 * @ops: the operations lookup table of the corresponding ematch module
160 * @datalen: length of the ematch specific configuration data
161 * @data: ematch specific data
162 */
163struct tcf_ematch {
164 struct tcf_ematch_ops * ops;
165 unsigned long data;
166 unsigned int datalen;
167 u16 matchid;
168 u16 flags;
169 struct net *net;
170};
171
172static inline int tcf_em_is_container(struct tcf_ematch *em)
173{
174 return !em->ops;
175}
176
177static inline int tcf_em_is_simple(struct tcf_ematch *em)
178{
179 return em->flags & TCF_EM_SIMPLE;
180}
181
182static inline int tcf_em_is_inverted(struct tcf_ematch *em)
183{
184 return em->flags & TCF_EM_INVERT;
185}
186
187static inline int tcf_em_last_match(struct tcf_ematch *em)
188{
189 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
190}
191
192static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
193{
194 if (tcf_em_last_match(em))
195 return 1;
196
197 if (result == 0 && em->flags & TCF_EM_REL_AND)
198 return 1;
199
200 if (result != 0 && em->flags & TCF_EM_REL_OR)
201 return 1;
202
203 return 0;
204}
205
206/**
207 * struct tcf_ematch_tree - ematch tree handle
208 *
209 * @hdr: ematch tree header supplied by userspace
210 * @matches: array of ematches
211 */
212struct tcf_ematch_tree {
213 struct tcf_ematch_tree_hdr hdr;
214 struct tcf_ematch * matches;
215
216};
217
218/**
219 * struct tcf_ematch_ops - ematch module operations
220 *
221 * @kind: identifier (kind) of this ematch module
222 * @datalen: length of expected configuration data (optional)
223 * @change: called during validation (optional)
224 * @match: called during ematch tree evaluation, must return 1/0
225 * @destroy: called during destroyage (optional)
226 * @dump: called during dumping process (optional)
227 * @owner: owner, must be set to THIS_MODULE
228 * @link: link to previous/next ematch module (internal use)
229 */
230struct tcf_ematch_ops {
231 int kind;
232 int datalen;
233 int (*change)(struct net *net, void *,
234 int, struct tcf_ematch *);
235 int (*match)(struct sk_buff *, struct tcf_ematch *,
236 struct tcf_pkt_info *);
237 void (*destroy)(struct tcf_ematch *);
238 int (*dump)(struct sk_buff *, struct tcf_ematch *);
239 struct module *owner;
240 struct list_head link;
241};
242
243int tcf_em_register(struct tcf_ematch_ops *);
244void tcf_em_unregister(struct tcf_ematch_ops *);
245int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
246 struct tcf_ematch_tree *);
247void tcf_em_tree_destroy(struct tcf_ematch_tree *);
248int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
249int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
250 struct tcf_pkt_info *);
251
252/**
253 * tcf_em_tree_change - replace ematch tree of a running classifier
254 *
255 * @tp: classifier kind handle
256 * @dst: destination ematch tree variable
257 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
258 *
259 * This functions replaces the ematch tree in @dst with the ematch
260 * tree in @src. The classifier in charge of the ematch tree may be
261 * running.
262 */
263static inline void tcf_em_tree_change(struct tcf_proto *tp,
264 struct tcf_ematch_tree *dst,
265 struct tcf_ematch_tree *src)
266{
267 tcf_tree_lock(tp);
268 memcpy(dst, src, sizeof(*dst));
269 tcf_tree_unlock(tp);
270}
271
272/**
273 * tcf_em_tree_match - evaulate an ematch tree
274 *
275 * @skb: socket buffer of the packet in question
276 * @tree: ematch tree to be used for evaluation
277 * @info: packet information examined by classifier
278 *
279 * This function matches @skb against the ematch tree in @tree by going
280 * through all ematches respecting their logic relations returning
281 * as soon as the result is obvious.
282 *
283 * Returns 1 if the ematch tree as-one matches, no ematches are configured
284 * or ematch is not enabled in the kernel, otherwise 0 is returned.
285 */
286static inline int tcf_em_tree_match(struct sk_buff *skb,
287 struct tcf_ematch_tree *tree,
288 struct tcf_pkt_info *info)
289{
290 if (tree->hdr.nmatches)
291 return __tcf_em_tree_match(skb, tree, info);
292 else
293 return 1;
294}
295
296#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
297
298#else /* CONFIG_NET_EMATCH */
299
300struct tcf_ematch_tree {
301};
302
303#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
304#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
305#define tcf_em_tree_dump(skb, t, tlv) (0)
306#define tcf_em_tree_change(tp, dst, src) do { } while(0)
307#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
308
309#endif /* CONFIG_NET_EMATCH */
310
311static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
312{
313 switch (layer) {
314 case TCF_LAYER_LINK:
315 return skb->data;
316 case TCF_LAYER_NETWORK:
317 return skb_network_header(skb);
318 case TCF_LAYER_TRANSPORT:
319 return skb_transport_header(skb);
320 }
321
322 return NULL;
323}
324
325static inline int tcf_valid_offset(const struct sk_buff *skb,
326 const unsigned char *ptr, const int len)
327{
328 return likely((ptr + len) <= skb_tail_pointer(skb) &&
329 ptr >= skb->head &&
330 (ptr <= (ptr + len)));
331}
332
333#ifdef CONFIG_NET_CLS_IND
334#include <net/net_namespace.h>
335
336static inline int
337tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
338{
339 char indev[IFNAMSIZ];
340 struct net_device *dev;
341
342 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
343 return -EINVAL;
344 dev = __dev_get_by_name(net, indev);
345 if (!dev)
346 return -ENODEV;
347 return dev->ifindex;
348}
349
350static inline bool
351tcf_match_indev(struct sk_buff *skb, int ifindex)
352{
353 if (!ifindex)
354 return true;
355 if (!skb->skb_iif)
356 return false;
357 return ifindex == skb->skb_iif;
358}
359#endif /* CONFIG_NET_CLS_IND */
360
361struct tc_cls_u32_knode {
362 struct tcf_exts *exts;
363 struct tc_u32_sel *sel;
364 u32 handle;
365 u32 val;
366 u32 mask;
367 u32 link_handle;
368 u8 fshift;
369};
370
371struct tc_cls_u32_hnode {
372 u32 handle;
373 u32 prio;
374 unsigned int divisor;
375};
376
377enum tc_clsu32_command {
378 TC_CLSU32_NEW_KNODE,
379 TC_CLSU32_REPLACE_KNODE,
380 TC_CLSU32_DELETE_KNODE,
381 TC_CLSU32_NEW_HNODE,
382 TC_CLSU32_REPLACE_HNODE,
383 TC_CLSU32_DELETE_HNODE,
384};
385
386struct tc_cls_u32_offload {
387 /* knode values */
388 enum tc_clsu32_command command;
389 union {
390 struct tc_cls_u32_knode knode;
391 struct tc_cls_u32_hnode hnode;
392 };
393};
394
395/* tca flags definitions */
396#define TCA_CLS_FLAGS_SKIP_HW 1
397
398static inline bool tc_should_offload(struct net_device *dev, u32 flags)
399{
400 if (!(dev->features & NETIF_F_HW_TC))
401 return false;
402
403 if (flags & TCA_CLS_FLAGS_SKIP_HW)
404 return false;
405
406 if (!dev->netdev_ops->ndo_setup_tc)
407 return false;
408
409 return true;
410}
411
412enum tc_fl_command {
413 TC_CLSFLOWER_REPLACE,
414 TC_CLSFLOWER_DESTROY,
415};
416
417struct tc_cls_flower_offload {
418 enum tc_fl_command command;
419 unsigned long cookie;
420 struct flow_dissector *dissector;
421 struct fl_flow_key *mask;
422 struct fl_flow_key *key;
423 struct tcf_exts *exts;
424};
425
426#endif
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/* Basic packet classifier frontend definitions. */
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; /* for backward compat(TCA_OLD_COMPAT) */
62 int nr_actions;
63 struct tc_action **actions;
64#endif
65 /* Map to export classifier specific extension TLV types to the
66 * generic extensions API. Unsupported extensions must be set to 0.
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 * tcf_exts_is_predicative - check if a predicative extension is present
89 * @exts: tc filter extensions handle
90 *
91 * Returns 1 if a predicative extension is present, i.e. an extension which
92 * might cause further actions and thus overrule the regular tcf_result.
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 * tcf_exts_is_available - check if at least one extension is present
106 * @exts: tc filter extensions handle
107 *
108 * Returns 1 if at least one extension is present.
109 */
110static inline int
111tcf_exts_is_available(struct tcf_exts *exts)
112{
113 /* All non-predicative extensions must be added here. */
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 * tcf_exts_exec - execute tc filter extensions
133 * @skb: socket buffer
134 * @exts: tc filter extensions handle
135 * @res: desired result
136 *
137 * Executes all configured extensions. Returns 0 on a normal execution,
138 * a negative number if the filter must be considered unmatched or
139 * a positive action code (TC_ACT_*) which must be returned to the
140 * underlying layer.
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 /* CONFIG_NET_CLS_ACT */
160
161#define tc_no_actions(_exts) true
162#define tc_single_action(_exts) false
163
164#endif /* CONFIG_NET_CLS_ACT */
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);
174int tcf_exts_get_dev(struct net_device *dev, struct tcf_exts *exts,
175 struct net_device **hw_dev);
176
177/**
178 * struct tcf_pkt_info - packet information
179 */
180struct tcf_pkt_info {
181 unsigned char * ptr;
182 int nexthdr;
183};
184
185#ifdef CONFIG_NET_EMATCH
186
187struct tcf_ematch_ops;
188
189/**
190 * struct tcf_ematch - extended match (ematch)
191 *
192 * @matchid: identifier to allow userspace to reidentify a match
193 * @flags: flags specifying attributes and the relation to other matches
194 * @ops: the operations lookup table of the corresponding ematch module
195 * @datalen: length of the ematch specific configuration data
196 * @data: ematch specific data
197 */
198struct tcf_ematch {
199 struct tcf_ematch_ops * ops;
200 unsigned long data;
201 unsigned int datalen;
202 u16 matchid;
203 u16 flags;
204 struct net *net;
205};
206
207static inline int tcf_em_is_container(struct tcf_ematch *em)
208{
209 return !em->ops;
210}
211
212static inline int tcf_em_is_simple(struct tcf_ematch *em)
213{
214 return em->flags & TCF_EM_SIMPLE;
215}
216
217static inline int tcf_em_is_inverted(struct tcf_ematch *em)
218{
219 return em->flags & TCF_EM_INVERT;
220}
221
222static inline int tcf_em_last_match(struct tcf_ematch *em)
223{
224 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
225}
226
227static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
228{
229 if (tcf_em_last_match(em))
230 return 1;
231
232 if (result == 0 && em->flags & TCF_EM_REL_AND)
233 return 1;
234
235 if (result != 0 && em->flags & TCF_EM_REL_OR)
236 return 1;
237
238 return 0;
239}
240
241/**
242 * struct tcf_ematch_tree - ematch tree handle
243 *
244 * @hdr: ematch tree header supplied by userspace
245 * @matches: array of ematches
246 */
247struct tcf_ematch_tree {
248 struct tcf_ematch_tree_hdr hdr;
249 struct tcf_ematch * matches;
250
251};
252
253/**
254 * struct tcf_ematch_ops - ematch module operations
255 *
256 * @kind: identifier (kind) of this ematch module
257 * @datalen: length of expected configuration data (optional)
258 * @change: called during validation (optional)
259 * @match: called during ematch tree evaluation, must return 1/0
260 * @destroy: called during destroyage (optional)
261 * @dump: called during dumping process (optional)
262 * @owner: owner, must be set to THIS_MODULE
263 * @link: link to previous/next ematch module (internal use)
264 */
265struct tcf_ematch_ops {
266 int kind;
267 int datalen;
268 int (*change)(struct net *net, void *,
269 int, struct tcf_ematch *);
270 int (*match)(struct sk_buff *, struct tcf_ematch *,
271 struct tcf_pkt_info *);
272 void (*destroy)(struct tcf_ematch *);
273 int (*dump)(struct sk_buff *, struct tcf_ematch *);
274 struct module *owner;
275 struct list_head link;
276};
277
278int tcf_em_register(struct tcf_ematch_ops *);
279void tcf_em_unregister(struct tcf_ematch_ops *);
280int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
281 struct tcf_ematch_tree *);
282void tcf_em_tree_destroy(struct tcf_ematch_tree *);
283int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
284int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
285 struct tcf_pkt_info *);
286
287/**
288 * tcf_em_tree_change - replace ematch tree of a running classifier
289 *
290 * @tp: classifier kind handle
291 * @dst: destination ematch tree variable
292 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
293 *
294 * This functions replaces the ematch tree in @dst with the ematch
295 * tree in @src. The classifier in charge of the ematch tree may be
296 * running.
297 */
298static inline void tcf_em_tree_change(struct tcf_proto *tp,
299 struct tcf_ematch_tree *dst,
300 struct tcf_ematch_tree *src)
301{
302 tcf_tree_lock(tp);
303 memcpy(dst, src, sizeof(*dst));
304 tcf_tree_unlock(tp);
305}
306
307/**
308 * tcf_em_tree_match - evaulate an ematch tree
309 *
310 * @skb: socket buffer of the packet in question
311 * @tree: ematch tree to be used for evaluation
312 * @info: packet information examined by classifier
313 *
314 * This function matches @skb against the ematch tree in @tree by going
315 * through all ematches respecting their logic relations returning
316 * as soon as the result is obvious.
317 *
318 * Returns 1 if the ematch tree as-one matches, no ematches are configured
319 * or ematch is not enabled in the kernel, otherwise 0 is returned.
320 */
321static inline int tcf_em_tree_match(struct sk_buff *skb,
322 struct tcf_ematch_tree *tree,
323 struct tcf_pkt_info *info)
324{
325 if (tree->hdr.nmatches)
326 return __tcf_em_tree_match(skb, tree, info);
327 else
328 return 1;
329}
330
331#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
332
333#else /* CONFIG_NET_EMATCH */
334
335struct tcf_ematch_tree {
336};
337
338#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
339#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
340#define tcf_em_tree_dump(skb, t, tlv) (0)
341#define tcf_em_tree_change(tp, dst, src) do { } while(0)
342#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
343
344#endif /* CONFIG_NET_EMATCH */
345
346static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
347{
348 switch (layer) {
349 case TCF_LAYER_LINK:
350 return skb->data;
351 case TCF_LAYER_NETWORK:
352 return skb_network_header(skb);
353 case TCF_LAYER_TRANSPORT:
354 return skb_transport_header(skb);
355 }
356
357 return NULL;
358}
359
360static inline int tcf_valid_offset(const struct sk_buff *skb,
361 const unsigned char *ptr, const int len)
362{
363 return likely((ptr + len) <= skb_tail_pointer(skb) &&
364 ptr >= skb->head &&
365 (ptr <= (ptr + len)));
366}
367
368#ifdef CONFIG_NET_CLS_IND
369#include <net/net_namespace.h>
370
371static inline int
372tcf_change_indev(struct net *net, struct nlattr *indev_tlv)
373{
374 char indev[IFNAMSIZ];
375 struct net_device *dev;
376
377 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
378 return -EINVAL;
379 dev = __dev_get_by_name(net, indev);
380 if (!dev)
381 return -ENODEV;
382 return dev->ifindex;
383}
384
385static inline bool
386tcf_match_indev(struct sk_buff *skb, int ifindex)
387{
388 if (!ifindex)
389 return true;
390 if (!skb->skb_iif)
391 return false;
392 return ifindex == skb->skb_iif;
393}
394#endif /* CONFIG_NET_CLS_IND */
395
396struct tc_cls_u32_knode {
397 struct tcf_exts *exts;
398 struct tc_u32_sel *sel;
399 u32 handle;
400 u32 val;
401 u32 mask;
402 u32 link_handle;
403 u8 fshift;
404};
405
406struct tc_cls_u32_hnode {
407 u32 handle;
408 u32 prio;
409 unsigned int divisor;
410};
411
412enum tc_clsu32_command {
413 TC_CLSU32_NEW_KNODE,
414 TC_CLSU32_REPLACE_KNODE,
415 TC_CLSU32_DELETE_KNODE,
416 TC_CLSU32_NEW_HNODE,
417 TC_CLSU32_REPLACE_HNODE,
418 TC_CLSU32_DELETE_HNODE,
419};
420
421struct tc_cls_u32_offload {
422 /* knode values */
423 enum tc_clsu32_command command;
424 union {
425 struct tc_cls_u32_knode knode;
426 struct tc_cls_u32_hnode hnode;
427 };
428};
429
430static inline bool tc_can_offload(const struct net_device *dev,
431 const struct tcf_proto *tp)
432{
433 const struct Qdisc *sch = tp->q;
434 const struct Qdisc_class_ops *cops = sch->ops->cl_ops;
435
436 if (!(dev->features & NETIF_F_HW_TC))
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_hw(u32 flags)
447{
448 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
449}
450
451static inline bool tc_should_offload(const struct net_device *dev,
452 const struct tcf_proto *tp, u32 flags)
453{
454 if (tc_skip_hw(flags))
455 return false;
456 return tc_can_offload(dev, tp);
457}
458
459static inline bool tc_skip_sw(u32 flags)
460{
461 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
462}
463
464/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
465static inline bool tc_flags_valid(u32 flags)
466{
467 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
468 return false;
469
470 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
471 return false;
472
473 return true;
474}
475
476enum tc_fl_command {
477 TC_CLSFLOWER_REPLACE,
478 TC_CLSFLOWER_DESTROY,
479 TC_CLSFLOWER_STATS,
480};
481
482struct tc_cls_flower_offload {
483 enum tc_fl_command command;
484 unsigned long cookie;
485 struct flow_dissector *dissector;
486 struct fl_flow_key *mask;
487 struct fl_flow_key *key;
488 struct tcf_exts *exts;
489};
490
491enum tc_matchall_command {
492 TC_CLSMATCHALL_REPLACE,
493 TC_CLSMATCHALL_DESTROY,
494};
495
496struct tc_cls_matchall_offload {
497 enum tc_matchall_command command;
498 struct tcf_exts *exts;
499 unsigned long cookie;
500};
501
502enum tc_clsbpf_command {
503 TC_CLSBPF_ADD,
504 TC_CLSBPF_REPLACE,
505 TC_CLSBPF_DESTROY,
506 TC_CLSBPF_STATS,
507};
508
509struct tc_cls_bpf_offload {
510 enum tc_clsbpf_command command;
511 struct tcf_exts *exts;
512 struct bpf_prog *prog;
513 const char *name;
514 bool exts_integrated;
515 u32 gen_flags;
516};
517
518#endif