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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
17extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
18extern int 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 struct tc_action *action;
66#endif
67};
68
69/* Map to export classifier specific extension TLV types to the
70 * generic extensions API. Unsupported extensions must be set to 0.
71 */
72struct tcf_ext_map {
73 int action;
74 int police;
75};
76
77/**
78 * tcf_exts_is_predicative - check if a predicative extension is present
79 * @exts: tc filter extensions handle
80 *
81 * Returns 1 if a predicative extension is present, i.e. an extension which
82 * might cause further actions and thus overrule the regular tcf_result.
83 */
84static inline int
85tcf_exts_is_predicative(struct tcf_exts *exts)
86{
87#ifdef CONFIG_NET_CLS_ACT
88 return !!exts->action;
89#else
90 return 0;
91#endif
92}
93
94/**
95 * tcf_exts_is_available - check if at least one extension is present
96 * @exts: tc filter extensions handle
97 *
98 * Returns 1 if at least one extension is present.
99 */
100static inline int
101tcf_exts_is_available(struct tcf_exts *exts)
102{
103 /* All non-predicative extensions must be added here. */
104 return tcf_exts_is_predicative(exts);
105}
106
107/**
108 * tcf_exts_exec - execute tc filter extensions
109 * @skb: socket buffer
110 * @exts: tc filter extensions handle
111 * @res: desired result
112 *
113 * Executes all configured extensions. Returns 0 on a normal execution,
114 * a negative number if the filter must be considered unmatched or
115 * a positive action code (TC_ACT_*) which must be returned to the
116 * underlying layer.
117 */
118static inline int
119tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
120 struct tcf_result *res)
121{
122#ifdef CONFIG_NET_CLS_ACT
123 if (exts->action)
124 return tcf_action_exec(skb, exts->action, res);
125#endif
126 return 0;
127}
128
129extern int tcf_exts_validate(struct tcf_proto *tp, struct nlattr **tb,
130 struct nlattr *rate_tlv, struct tcf_exts *exts,
131 const struct tcf_ext_map *map);
132extern void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
133extern void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
134 struct tcf_exts *src);
135extern int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts,
136 const struct tcf_ext_map *map);
137extern int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts,
138 const struct tcf_ext_map *map);
139
140/**
141 * struct tcf_pkt_info - packet information
142 */
143struct tcf_pkt_info {
144 unsigned char * ptr;
145 int nexthdr;
146};
147
148#ifdef CONFIG_NET_EMATCH
149
150struct tcf_ematch_ops;
151
152/**
153 * struct tcf_ematch - extended match (ematch)
154 *
155 * @matchid: identifier to allow userspace to reidentify a match
156 * @flags: flags specifying attributes and the relation to other matches
157 * @ops: the operations lookup table of the corresponding ematch module
158 * @datalen: length of the ematch specific configuration data
159 * @data: ematch specific data
160 */
161struct tcf_ematch {
162 struct tcf_ematch_ops * ops;
163 unsigned long data;
164 unsigned int datalen;
165 u16 matchid;
166 u16 flags;
167};
168
169static inline int tcf_em_is_container(struct tcf_ematch *em)
170{
171 return !em->ops;
172}
173
174static inline int tcf_em_is_simple(struct tcf_ematch *em)
175{
176 return em->flags & TCF_EM_SIMPLE;
177}
178
179static inline int tcf_em_is_inverted(struct tcf_ematch *em)
180{
181 return em->flags & TCF_EM_INVERT;
182}
183
184static inline int tcf_em_last_match(struct tcf_ematch *em)
185{
186 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
187}
188
189static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
190{
191 if (tcf_em_last_match(em))
192 return 1;
193
194 if (result == 0 && em->flags & TCF_EM_REL_AND)
195 return 1;
196
197 if (result != 0 && em->flags & TCF_EM_REL_OR)
198 return 1;
199
200 return 0;
201}
202
203/**
204 * struct tcf_ematch_tree - ematch tree handle
205 *
206 * @hdr: ematch tree header supplied by userspace
207 * @matches: array of ematches
208 */
209struct tcf_ematch_tree {
210 struct tcf_ematch_tree_hdr hdr;
211 struct tcf_ematch * matches;
212
213};
214
215/**
216 * struct tcf_ematch_ops - ematch module operations
217 *
218 * @kind: identifier (kind) of this ematch module
219 * @datalen: length of expected configuration data (optional)
220 * @change: called during validation (optional)
221 * @match: called during ematch tree evaluation, must return 1/0
222 * @destroy: called during destroyage (optional)
223 * @dump: called during dumping process (optional)
224 * @owner: owner, must be set to THIS_MODULE
225 * @link: link to previous/next ematch module (internal use)
226 */
227struct tcf_ematch_ops {
228 int kind;
229 int datalen;
230 int (*change)(struct tcf_proto *, void *,
231 int, struct tcf_ematch *);
232 int (*match)(struct sk_buff *, struct tcf_ematch *,
233 struct tcf_pkt_info *);
234 void (*destroy)(struct tcf_proto *,
235 struct tcf_ematch *);
236 int (*dump)(struct sk_buff *, struct tcf_ematch *);
237 struct module *owner;
238 struct list_head link;
239};
240
241extern int tcf_em_register(struct tcf_ematch_ops *);
242extern void tcf_em_unregister(struct tcf_ematch_ops *);
243extern int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
244 struct tcf_ematch_tree *);
245extern void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
246extern int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
247extern int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
248 struct tcf_pkt_info *);
249
250/**
251 * tcf_em_tree_change - replace ematch tree of a running classifier
252 *
253 * @tp: classifier kind handle
254 * @dst: destination ematch tree variable
255 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
256 *
257 * This functions replaces the ematch tree in @dst with the ematch
258 * tree in @src. The classifier in charge of the ematch tree may be
259 * running.
260 */
261static inline void tcf_em_tree_change(struct tcf_proto *tp,
262 struct tcf_ematch_tree *dst,
263 struct tcf_ematch_tree *src)
264{
265 tcf_tree_lock(tp);
266 memcpy(dst, src, sizeof(*dst));
267 tcf_tree_unlock(tp);
268}
269
270/**
271 * tcf_em_tree_match - evaulate an ematch tree
272 *
273 * @skb: socket buffer of the packet in question
274 * @tree: ematch tree to be used for evaluation
275 * @info: packet information examined by classifier
276 *
277 * This function matches @skb against the ematch tree in @tree by going
278 * through all ematches respecting their logic relations returning
279 * as soon as the result is obvious.
280 *
281 * Returns 1 if the ematch tree as-one matches, no ematches are configured
282 * or ematch is not enabled in the kernel, otherwise 0 is returned.
283 */
284static inline int tcf_em_tree_match(struct sk_buff *skb,
285 struct tcf_ematch_tree *tree,
286 struct tcf_pkt_info *info)
287{
288 if (tree->hdr.nmatches)
289 return __tcf_em_tree_match(skb, tree, info);
290 else
291 return 1;
292}
293
294#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
295
296#else /* CONFIG_NET_EMATCH */
297
298struct tcf_ematch_tree {
299};
300
301#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
302#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
303#define tcf_em_tree_dump(skb, t, tlv) (0)
304#define tcf_em_tree_change(tp, dst, src) do { } while(0)
305#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
306
307#endif /* CONFIG_NET_EMATCH */
308
309static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
310{
311 switch (layer) {
312 case TCF_LAYER_LINK:
313 return skb->data;
314 case TCF_LAYER_NETWORK:
315 return skb_network_header(skb);
316 case TCF_LAYER_TRANSPORT:
317 return skb_transport_header(skb);
318 }
319
320 return NULL;
321}
322
323static inline int tcf_valid_offset(const struct sk_buff *skb,
324 const unsigned char *ptr, const int len)
325{
326 return likely((ptr + len) <= skb_tail_pointer(skb) &&
327 ptr >= skb->head &&
328 (ptr <= (ptr + len)));
329}
330
331#ifdef CONFIG_NET_CLS_IND
332#include <net/net_namespace.h>
333
334static inline int
335tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv)
336{
337 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
338 return -EINVAL;
339 return 0;
340}
341
342static inline int
343tcf_match_indev(struct sk_buff *skb, char *indev)
344{
345 struct net_device *dev;
346
347 if (indev[0]) {
348 if (!skb->skb_iif)
349 return 0;
350 dev = __dev_get_by_index(dev_net(skb->dev), skb->skb_iif);
351 if (!dev || strcmp(indev, dev->name))
352 return 0;
353 }
354
355 return 1;
356}
357#endif /* CONFIG_NET_CLS_IND */
358
359#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_PKT_CLS_H
3#define __NET_PKT_CLS_H
4
5#include <linux/pkt_cls.h>
6#include <linux/workqueue.h>
7#include <net/sch_generic.h>
8#include <net/act_api.h>
9
10/* Basic packet classifier frontend definitions. */
11
12struct tcf_walker {
13 int stop;
14 int skip;
15 int count;
16 int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
17};
18
19int register_tcf_proto_ops(struct tcf_proto_ops *ops);
20int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
21
22enum tcf_block_binder_type {
23 TCF_BLOCK_BINDER_TYPE_UNSPEC,
24 TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
25 TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
26};
27
28struct tcf_block_ext_info {
29 enum tcf_block_binder_type binder_type;
30 tcf_chain_head_change_t *chain_head_change;
31 void *chain_head_change_priv;
32 u32 block_index;
33};
34
35struct tcf_block_cb;
36bool tcf_queue_work(struct work_struct *work);
37
38#ifdef CONFIG_NET_CLS
39struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
40 bool create);
41void tcf_chain_put(struct tcf_chain *chain);
42void tcf_block_netif_keep_dst(struct tcf_block *block);
43int tcf_block_get(struct tcf_block **p_block,
44 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
45 struct netlink_ext_ack *extack);
46int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
47 struct tcf_block_ext_info *ei,
48 struct netlink_ext_ack *extack);
49void tcf_block_put(struct tcf_block *block);
50void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
51 struct tcf_block_ext_info *ei);
52
53static inline bool tcf_block_shared(struct tcf_block *block)
54{
55 return block->index;
56}
57
58static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
59{
60 WARN_ON(tcf_block_shared(block));
61 return block->q;
62}
63
64static inline struct net_device *tcf_block_dev(struct tcf_block *block)
65{
66 return tcf_block_q(block)->dev_queue->dev;
67}
68
69void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
70struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
71 tc_setup_cb_t *cb, void *cb_ident);
72void tcf_block_cb_incref(struct tcf_block_cb *block_cb);
73unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb);
74struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
75 tc_setup_cb_t *cb, void *cb_ident,
76 void *cb_priv);
77int tcf_block_cb_register(struct tcf_block *block,
78 tc_setup_cb_t *cb, void *cb_ident,
79 void *cb_priv);
80void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb);
81void tcf_block_cb_unregister(struct tcf_block *block,
82 tc_setup_cb_t *cb, void *cb_ident);
83
84int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
85 struct tcf_result *res, bool compat_mode);
86
87#else
88static inline
89int tcf_block_get(struct tcf_block **p_block,
90 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
91 struct netlink_ext_ack *extack)
92{
93 return 0;
94}
95
96static inline
97int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
98 struct tcf_block_ext_info *ei,
99 struct netlink_ext_ack *extack)
100{
101 return 0;
102}
103
104static inline void tcf_block_put(struct tcf_block *block)
105{
106}
107
108static inline
109void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
110 struct tcf_block_ext_info *ei)
111{
112}
113
114static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
115{
116 return NULL;
117}
118
119static inline struct net_device *tcf_block_dev(struct tcf_block *block)
120{
121 return NULL;
122}
123
124static inline
125int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
126 void *cb_priv)
127{
128 return 0;
129}
130
131static inline
132void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
133 void *cb_priv)
134{
135}
136
137static inline
138void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
139{
140 return NULL;
141}
142
143static inline
144struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
145 tc_setup_cb_t *cb, void *cb_ident)
146{
147 return NULL;
148}
149
150static inline
151void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
152{
153}
154
155static inline
156unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
157{
158 return 0;
159}
160
161static inline
162struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
163 tc_setup_cb_t *cb, void *cb_ident,
164 void *cb_priv)
165{
166 return NULL;
167}
168
169static inline
170int tcf_block_cb_register(struct tcf_block *block,
171 tc_setup_cb_t *cb, void *cb_ident,
172 void *cb_priv)
173{
174 return 0;
175}
176
177static inline
178void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb)
179{
180}
181
182static inline
183void tcf_block_cb_unregister(struct tcf_block *block,
184 tc_setup_cb_t *cb, void *cb_ident)
185{
186}
187
188static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
189 struct tcf_result *res, bool compat_mode)
190{
191 return TC_ACT_UNSPEC;
192}
193#endif
194
195static inline unsigned long
196__cls_set_class(unsigned long *clp, unsigned long cl)
197{
198 return xchg(clp, cl);
199}
200
201static inline unsigned long
202cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
203{
204 unsigned long old_cl;
205
206 sch_tree_lock(q);
207 old_cl = __cls_set_class(clp, cl);
208 sch_tree_unlock(q);
209 return old_cl;
210}
211
212static inline void
213tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
214{
215 struct Qdisc *q = tp->chain->block->q;
216 unsigned long cl;
217
218 /* Check q as it is not set for shared blocks. In that case,
219 * setting class is not supported.
220 */
221 if (!q)
222 return;
223 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
224 cl = cls_set_class(q, &r->class, cl);
225 if (cl)
226 q->ops->cl_ops->unbind_tcf(q, cl);
227}
228
229static inline void
230tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
231{
232 struct Qdisc *q = tp->chain->block->q;
233 unsigned long cl;
234
235 if (!q)
236 return;
237 if ((cl = __cls_set_class(&r->class, 0)) != 0)
238 q->ops->cl_ops->unbind_tcf(q, cl);
239}
240
241struct tcf_exts {
242#ifdef CONFIG_NET_CLS_ACT
243 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
244 int nr_actions;
245 struct tc_action **actions;
246 struct net *net;
247#endif
248 /* Map to export classifier specific extension TLV types to the
249 * generic extensions API. Unsupported extensions must be set to 0.
250 */
251 int action;
252 int police;
253};
254
255static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
256{
257#ifdef CONFIG_NET_CLS_ACT
258 exts->type = 0;
259 exts->nr_actions = 0;
260 exts->net = NULL;
261 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
262 GFP_KERNEL);
263 if (!exts->actions)
264 return -ENOMEM;
265#endif
266 exts->action = action;
267 exts->police = police;
268 return 0;
269}
270
271/* Return false if the netns is being destroyed in cleanup_net(). Callers
272 * need to do cleanup synchronously in this case, otherwise may race with
273 * tc_action_net_exit(). Return true for other cases.
274 */
275static inline bool tcf_exts_get_net(struct tcf_exts *exts)
276{
277#ifdef CONFIG_NET_CLS_ACT
278 exts->net = maybe_get_net(exts->net);
279 return exts->net != NULL;
280#else
281 return true;
282#endif
283}
284
285static inline void tcf_exts_put_net(struct tcf_exts *exts)
286{
287#ifdef CONFIG_NET_CLS_ACT
288 if (exts->net)
289 put_net(exts->net);
290#endif
291}
292
293static inline void tcf_exts_to_list(const struct tcf_exts *exts,
294 struct list_head *actions)
295{
296#ifdef CONFIG_NET_CLS_ACT
297 int i;
298
299 for (i = 0; i < exts->nr_actions; i++) {
300 struct tc_action *a = exts->actions[i];
301
302 list_add_tail(&a->list, actions);
303 }
304#endif
305}
306
307static inline void
308tcf_exts_stats_update(const struct tcf_exts *exts,
309 u64 bytes, u64 packets, u64 lastuse)
310{
311#ifdef CONFIG_NET_CLS_ACT
312 int i;
313
314 preempt_disable();
315
316 for (i = 0; i < exts->nr_actions; i++) {
317 struct tc_action *a = exts->actions[i];
318
319 tcf_action_stats_update(a, bytes, packets, lastuse);
320 }
321
322 preempt_enable();
323#endif
324}
325
326/**
327 * tcf_exts_has_actions - check if at least one action is present
328 * @exts: tc filter extensions handle
329 *
330 * Returns true if at least one action is present.
331 */
332static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
333{
334#ifdef CONFIG_NET_CLS_ACT
335 return exts->nr_actions;
336#else
337 return false;
338#endif
339}
340
341/**
342 * tcf_exts_has_one_action - check if exactly one action is present
343 * @exts: tc filter extensions handle
344 *
345 * Returns true if exactly one action is present.
346 */
347static inline bool tcf_exts_has_one_action(struct tcf_exts *exts)
348{
349#ifdef CONFIG_NET_CLS_ACT
350 return exts->nr_actions == 1;
351#else
352 return false;
353#endif
354}
355
356/**
357 * tcf_exts_exec - execute tc filter extensions
358 * @skb: socket buffer
359 * @exts: tc filter extensions handle
360 * @res: desired result
361 *
362 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
363 * a negative number if the filter must be considered unmatched or
364 * a positive action code (TC_ACT_*) which must be returned to the
365 * underlying layer.
366 */
367static inline int
368tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
369 struct tcf_result *res)
370{
371#ifdef CONFIG_NET_CLS_ACT
372 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
373#endif
374 return TC_ACT_OK;
375}
376
377int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
378 struct nlattr **tb, struct nlattr *rate_tlv,
379 struct tcf_exts *exts, bool ovr,
380 struct netlink_ext_ack *extack);
381void tcf_exts_destroy(struct tcf_exts *exts);
382void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
383int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
384int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
385
386/**
387 * struct tcf_pkt_info - packet information
388 */
389struct tcf_pkt_info {
390 unsigned char * ptr;
391 int nexthdr;
392};
393
394#ifdef CONFIG_NET_EMATCH
395
396struct tcf_ematch_ops;
397
398/**
399 * struct tcf_ematch - extended match (ematch)
400 *
401 * @matchid: identifier to allow userspace to reidentify a match
402 * @flags: flags specifying attributes and the relation to other matches
403 * @ops: the operations lookup table of the corresponding ematch module
404 * @datalen: length of the ematch specific configuration data
405 * @data: ematch specific data
406 */
407struct tcf_ematch {
408 struct tcf_ematch_ops * ops;
409 unsigned long data;
410 unsigned int datalen;
411 u16 matchid;
412 u16 flags;
413 struct net *net;
414};
415
416static inline int tcf_em_is_container(struct tcf_ematch *em)
417{
418 return !em->ops;
419}
420
421static inline int tcf_em_is_simple(struct tcf_ematch *em)
422{
423 return em->flags & TCF_EM_SIMPLE;
424}
425
426static inline int tcf_em_is_inverted(struct tcf_ematch *em)
427{
428 return em->flags & TCF_EM_INVERT;
429}
430
431static inline int tcf_em_last_match(struct tcf_ematch *em)
432{
433 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
434}
435
436static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
437{
438 if (tcf_em_last_match(em))
439 return 1;
440
441 if (result == 0 && em->flags & TCF_EM_REL_AND)
442 return 1;
443
444 if (result != 0 && em->flags & TCF_EM_REL_OR)
445 return 1;
446
447 return 0;
448}
449
450/**
451 * struct tcf_ematch_tree - ematch tree handle
452 *
453 * @hdr: ematch tree header supplied by userspace
454 * @matches: array of ematches
455 */
456struct tcf_ematch_tree {
457 struct tcf_ematch_tree_hdr hdr;
458 struct tcf_ematch * matches;
459
460};
461
462/**
463 * struct tcf_ematch_ops - ematch module operations
464 *
465 * @kind: identifier (kind) of this ematch module
466 * @datalen: length of expected configuration data (optional)
467 * @change: called during validation (optional)
468 * @match: called during ematch tree evaluation, must return 1/0
469 * @destroy: called during destroyage (optional)
470 * @dump: called during dumping process (optional)
471 * @owner: owner, must be set to THIS_MODULE
472 * @link: link to previous/next ematch module (internal use)
473 */
474struct tcf_ematch_ops {
475 int kind;
476 int datalen;
477 int (*change)(struct net *net, void *,
478 int, struct tcf_ematch *);
479 int (*match)(struct sk_buff *, struct tcf_ematch *,
480 struct tcf_pkt_info *);
481 void (*destroy)(struct tcf_ematch *);
482 int (*dump)(struct sk_buff *, struct tcf_ematch *);
483 struct module *owner;
484 struct list_head link;
485};
486
487int tcf_em_register(struct tcf_ematch_ops *);
488void tcf_em_unregister(struct tcf_ematch_ops *);
489int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
490 struct tcf_ematch_tree *);
491void tcf_em_tree_destroy(struct tcf_ematch_tree *);
492int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
493int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
494 struct tcf_pkt_info *);
495
496/**
497 * tcf_em_tree_match - evaulate an ematch tree
498 *
499 * @skb: socket buffer of the packet in question
500 * @tree: ematch tree to be used for evaluation
501 * @info: packet information examined by classifier
502 *
503 * This function matches @skb against the ematch tree in @tree by going
504 * through all ematches respecting their logic relations returning
505 * as soon as the result is obvious.
506 *
507 * Returns 1 if the ematch tree as-one matches, no ematches are configured
508 * or ematch is not enabled in the kernel, otherwise 0 is returned.
509 */
510static inline int tcf_em_tree_match(struct sk_buff *skb,
511 struct tcf_ematch_tree *tree,
512 struct tcf_pkt_info *info)
513{
514 if (tree->hdr.nmatches)
515 return __tcf_em_tree_match(skb, tree, info);
516 else
517 return 1;
518}
519
520#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
521
522#else /* CONFIG_NET_EMATCH */
523
524struct tcf_ematch_tree {
525};
526
527#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
528#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
529#define tcf_em_tree_dump(skb, t, tlv) (0)
530#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
531
532#endif /* CONFIG_NET_EMATCH */
533
534static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
535{
536 switch (layer) {
537 case TCF_LAYER_LINK:
538 return skb_mac_header(skb);
539 case TCF_LAYER_NETWORK:
540 return skb_network_header(skb);
541 case TCF_LAYER_TRANSPORT:
542 return skb_transport_header(skb);
543 }
544
545 return NULL;
546}
547
548static inline int tcf_valid_offset(const struct sk_buff *skb,
549 const unsigned char *ptr, const int len)
550{
551 return likely((ptr + len) <= skb_tail_pointer(skb) &&
552 ptr >= skb->head &&
553 (ptr <= (ptr + len)));
554}
555
556#ifdef CONFIG_NET_CLS_IND
557#include <net/net_namespace.h>
558
559static inline int
560tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
561 struct netlink_ext_ack *extack)
562{
563 char indev[IFNAMSIZ];
564 struct net_device *dev;
565
566 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
567 NL_SET_ERR_MSG(extack, "Interface name too long");
568 return -EINVAL;
569 }
570 dev = __dev_get_by_name(net, indev);
571 if (!dev)
572 return -ENODEV;
573 return dev->ifindex;
574}
575
576static inline bool
577tcf_match_indev(struct sk_buff *skb, int ifindex)
578{
579 if (!ifindex)
580 return true;
581 if (!skb->skb_iif)
582 return false;
583 return ifindex == skb->skb_iif;
584}
585#endif /* CONFIG_NET_CLS_IND */
586
587int tc_setup_cb_call(struct tcf_block *block, struct tcf_exts *exts,
588 enum tc_setup_type type, void *type_data, bool err_stop);
589
590enum tc_block_command {
591 TC_BLOCK_BIND,
592 TC_BLOCK_UNBIND,
593};
594
595struct tc_block_offload {
596 enum tc_block_command command;
597 enum tcf_block_binder_type binder_type;
598 struct tcf_block *block;
599};
600
601struct tc_cls_common_offload {
602 u32 chain_index;
603 __be16 protocol;
604 u32 prio;
605 struct netlink_ext_ack *extack;
606};
607
608struct tc_cls_u32_knode {
609 struct tcf_exts *exts;
610 struct tc_u32_sel *sel;
611 u32 handle;
612 u32 val;
613 u32 mask;
614 u32 link_handle;
615 u8 fshift;
616};
617
618struct tc_cls_u32_hnode {
619 u32 handle;
620 u32 prio;
621 unsigned int divisor;
622};
623
624enum tc_clsu32_command {
625 TC_CLSU32_NEW_KNODE,
626 TC_CLSU32_REPLACE_KNODE,
627 TC_CLSU32_DELETE_KNODE,
628 TC_CLSU32_NEW_HNODE,
629 TC_CLSU32_REPLACE_HNODE,
630 TC_CLSU32_DELETE_HNODE,
631};
632
633struct tc_cls_u32_offload {
634 struct tc_cls_common_offload common;
635 /* knode values */
636 enum tc_clsu32_command command;
637 union {
638 struct tc_cls_u32_knode knode;
639 struct tc_cls_u32_hnode hnode;
640 };
641};
642
643static inline bool tc_can_offload(const struct net_device *dev)
644{
645 return dev->features & NETIF_F_HW_TC;
646}
647
648static inline bool tc_can_offload_extack(const struct net_device *dev,
649 struct netlink_ext_ack *extack)
650{
651 bool can = tc_can_offload(dev);
652
653 if (!can)
654 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
655
656 return can;
657}
658
659static inline bool
660tc_cls_can_offload_and_chain0(const struct net_device *dev,
661 struct tc_cls_common_offload *common)
662{
663 if (!tc_can_offload_extack(dev, common->extack))
664 return false;
665 if (common->chain_index) {
666 NL_SET_ERR_MSG(common->extack,
667 "Driver supports only offload of chain 0");
668 return false;
669 }
670 return true;
671}
672
673static inline bool tc_skip_hw(u32 flags)
674{
675 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
676}
677
678static inline bool tc_skip_sw(u32 flags)
679{
680 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
681}
682
683/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
684static inline bool tc_flags_valid(u32 flags)
685{
686 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
687 return false;
688
689 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
690 return false;
691
692 return true;
693}
694
695static inline bool tc_in_hw(u32 flags)
696{
697 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
698}
699
700static inline void
701tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common,
702 const struct tcf_proto *tp, u32 flags,
703 struct netlink_ext_ack *extack)
704{
705 cls_common->chain_index = tp->chain->index;
706 cls_common->protocol = tp->protocol;
707 cls_common->prio = tp->prio;
708 if (tc_skip_sw(flags))
709 cls_common->extack = extack;
710}
711
712enum tc_fl_command {
713 TC_CLSFLOWER_REPLACE,
714 TC_CLSFLOWER_DESTROY,
715 TC_CLSFLOWER_STATS,
716};
717
718struct tc_cls_flower_offload {
719 struct tc_cls_common_offload common;
720 enum tc_fl_command command;
721 unsigned long cookie;
722 struct flow_dissector *dissector;
723 struct fl_flow_key *mask;
724 struct fl_flow_key *key;
725 struct tcf_exts *exts;
726 u32 classid;
727};
728
729enum tc_matchall_command {
730 TC_CLSMATCHALL_REPLACE,
731 TC_CLSMATCHALL_DESTROY,
732};
733
734struct tc_cls_matchall_offload {
735 struct tc_cls_common_offload common;
736 enum tc_matchall_command command;
737 struct tcf_exts *exts;
738 unsigned long cookie;
739};
740
741enum tc_clsbpf_command {
742 TC_CLSBPF_OFFLOAD,
743 TC_CLSBPF_STATS,
744};
745
746struct tc_cls_bpf_offload {
747 struct tc_cls_common_offload common;
748 enum tc_clsbpf_command command;
749 struct tcf_exts *exts;
750 struct bpf_prog *prog;
751 struct bpf_prog *oldprog;
752 const char *name;
753 bool exts_integrated;
754};
755
756struct tc_mqprio_qopt_offload {
757 /* struct tc_mqprio_qopt must always be the first element */
758 struct tc_mqprio_qopt qopt;
759 u16 mode;
760 u16 shaper;
761 u32 flags;
762 u64 min_rate[TC_QOPT_MAX_QUEUE];
763 u64 max_rate[TC_QOPT_MAX_QUEUE];
764};
765
766/* This structure holds cookie structure that is passed from user
767 * to the kernel for actions and classifiers
768 */
769struct tc_cookie {
770 u8 *data;
771 u32 len;
772};
773
774struct tc_qopt_offload_stats {
775 struct gnet_stats_basic_packed *bstats;
776 struct gnet_stats_queue *qstats;
777};
778
779enum tc_red_command {
780 TC_RED_REPLACE,
781 TC_RED_DESTROY,
782 TC_RED_STATS,
783 TC_RED_XSTATS,
784};
785
786struct tc_red_qopt_offload_params {
787 u32 min;
788 u32 max;
789 u32 probability;
790 bool is_ecn;
791 struct gnet_stats_queue *qstats;
792};
793
794struct tc_red_qopt_offload {
795 enum tc_red_command command;
796 u32 handle;
797 u32 parent;
798 union {
799 struct tc_red_qopt_offload_params set;
800 struct tc_qopt_offload_stats stats;
801 struct red_stats *xstats;
802 };
803};
804
805enum tc_prio_command {
806 TC_PRIO_REPLACE,
807 TC_PRIO_DESTROY,
808 TC_PRIO_STATS,
809 TC_PRIO_GRAFT,
810};
811
812struct tc_prio_qopt_offload_params {
813 int bands;
814 u8 priomap[TC_PRIO_MAX + 1];
815 /* In case that a prio qdisc is offloaded and now is changed to a
816 * non-offloadedable config, it needs to update the backlog & qlen
817 * values to negate the HW backlog & qlen values (and only them).
818 */
819 struct gnet_stats_queue *qstats;
820};
821
822struct tc_prio_qopt_offload_graft_params {
823 u8 band;
824 u32 child_handle;
825};
826
827struct tc_prio_qopt_offload {
828 enum tc_prio_command command;
829 u32 handle;
830 u32 parent;
831 union {
832 struct tc_prio_qopt_offload_params replace_params;
833 struct tc_qopt_offload_stats stats;
834 struct tc_prio_qopt_offload_graft_params graft_params;
835 };
836};
837
838#endif