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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 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; /* for backward compat(TCA_OLD_COMPAT) */
66 struct list_head actions;
67#endif
68 /* Map to export classifier specific extension TLV types to the
69 * generic extensions API. Unsupported extensions must be set to 0.
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 * tcf_exts_is_predicative - check if a predicative extension is present
87 * @exts: tc filter extensions handle
88 *
89 * Returns 1 if a predicative extension is present, i.e. an extension which
90 * might cause further actions and thus overrule the regular tcf_result.
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 * tcf_exts_is_available - check if at least one extension is present
104 * @exts: tc filter extensions handle
105 *
106 * Returns 1 if at least one extension is present.
107 */
108static inline int
109tcf_exts_is_available(struct tcf_exts *exts)
110{
111 /* All non-predicative extensions must be added here. */
112 return tcf_exts_is_predicative(exts);
113}
114
115/**
116 * tcf_exts_exec - execute tc filter extensions
117 * @skb: socket buffer
118 * @exts: tc filter extensions handle
119 * @res: desired result
120 *
121 * Executes all configured extensions. Returns 0 on a normal execution,
122 * a negative number if the filter must be considered unmatched or
123 * a positive action code (TC_ACT_*) which must be returned to the
124 * underlying layer.
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);
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 * struct tcf_pkt_info - packet information
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 * struct tcf_ematch - extended match (ematch)
160 *
161 * @matchid: identifier to allow userspace to reidentify a match
162 * @flags: flags specifying attributes and the relation to other matches
163 * @ops: the operations lookup table of the corresponding ematch module
164 * @datalen: length of the ematch specific configuration data
165 * @data: ematch specific data
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 * struct tcf_ematch_tree - ematch tree handle
211 *
212 * @hdr: ematch tree header supplied by userspace
213 * @matches: array of ematches
214 */
215struct tcf_ematch_tree {
216 struct tcf_ematch_tree_hdr hdr;
217 struct tcf_ematch * matches;
218
219};
220
221/**
222 * struct tcf_ematch_ops - ematch module operations
223 *
224 * @kind: identifier (kind) of this ematch module
225 * @datalen: length of expected configuration data (optional)
226 * @change: called during validation (optional)
227 * @match: called during ematch tree evaluation, must return 1/0
228 * @destroy: called during destroyage (optional)
229 * @dump: called during dumping process (optional)
230 * @owner: owner, must be set to THIS_MODULE
231 * @link: link to previous/next ematch module (internal use)
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/**
257 * tcf_em_tree_change - replace ematch tree of a running classifier
258 *
259 * @tp: classifier kind handle
260 * @dst: destination ematch tree variable
261 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
262 *
263 * This functions replaces the ematch tree in @dst with the ematch
264 * tree in @src. The classifier in charge of the ematch tree may be
265 * running.
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
276/**
277 * tcf_em_tree_match - evaulate an ematch tree
278 *
279 * @skb: socket buffer of the packet in question
280 * @tree: ematch tree to be used for evaluation
281 * @info: packet information examined by classifier
282 *
283 * This function matches @skb against the ematch tree in @tree by going
284 * through all ematches respecting their logic relations returning
285 * as soon as the result is obvious.
286 *
287 * Returns 1 if the ematch tree as-one matches, no ematches are configured
288 * or ematch is not enabled in the kernel, otherwise 0 is returned.
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 /* CONFIG_NET_EMATCH */
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 /* CONFIG_NET_EMATCH */
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 /* CONFIG_NET_CLS_IND */
364
365#endif