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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#include <net/net_namespace.h>
10
11/* TC action not accessible from user space */
12#define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1)
13
14/* Basic packet classifier frontend definitions. */
15
16struct tcf_walker {
17 int stop;
18 int skip;
19 int count;
20 bool nonempty;
21 unsigned long cookie;
22 int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
23};
24
25int register_tcf_proto_ops(struct tcf_proto_ops *ops);
26int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
27
28struct tcf_block_ext_info {
29 enum flow_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_qevent {
36 struct tcf_block *block;
37 struct tcf_block_ext_info info;
38 struct tcf_proto __rcu *filter_chain;
39};
40
41struct tcf_block_cb;
42bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
43
44#ifdef CONFIG_NET_CLS
45struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
46 u32 chain_index);
47void tcf_chain_put_by_act(struct tcf_chain *chain);
48struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
49 struct tcf_chain *chain);
50struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
51 struct tcf_proto *tp, bool rtnl_held);
52void tcf_block_netif_keep_dst(struct tcf_block *block);
53int tcf_block_get(struct tcf_block **p_block,
54 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
55 struct netlink_ext_ack *extack);
56int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
57 struct tcf_block_ext_info *ei,
58 struct netlink_ext_ack *extack);
59void tcf_block_put(struct tcf_block *block);
60void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
61 struct tcf_block_ext_info *ei);
62
63static inline bool tcf_block_shared(struct tcf_block *block)
64{
65 return block->index;
66}
67
68static inline bool tcf_block_non_null_shared(struct tcf_block *block)
69{
70 return block && block->index;
71}
72
73static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
74{
75 WARN_ON(tcf_block_shared(block));
76 return block->q;
77}
78
79int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
80 struct tcf_result *res, bool compat_mode);
81int tcf_classify_ingress(struct sk_buff *skb,
82 const struct tcf_block *ingress_block,
83 const struct tcf_proto *tp, struct tcf_result *res,
84 bool compat_mode);
85
86#else
87static inline bool tcf_block_shared(struct tcf_block *block)
88{
89 return false;
90}
91
92static inline bool tcf_block_non_null_shared(struct tcf_block *block)
93{
94 return false;
95}
96
97static inline
98int tcf_block_get(struct tcf_block **p_block,
99 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
100 struct netlink_ext_ack *extack)
101{
102 return 0;
103}
104
105static inline
106int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
107 struct tcf_block_ext_info *ei,
108 struct netlink_ext_ack *extack)
109{
110 return 0;
111}
112
113static inline void tcf_block_put(struct tcf_block *block)
114{
115}
116
117static inline
118void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
119 struct tcf_block_ext_info *ei)
120{
121}
122
123static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
124{
125 return NULL;
126}
127
128static inline
129int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
130 void *cb_priv)
131{
132 return 0;
133}
134
135static inline
136void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
137 void *cb_priv)
138{
139}
140
141static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
142 struct tcf_result *res, bool compat_mode)
143{
144 return TC_ACT_UNSPEC;
145}
146
147static inline int tcf_classify_ingress(struct sk_buff *skb,
148 const struct tcf_block *ingress_block,
149 const struct tcf_proto *tp,
150 struct tcf_result *res, bool compat_mode)
151{
152 return TC_ACT_UNSPEC;
153}
154
155#endif
156
157static inline unsigned long
158__cls_set_class(unsigned long *clp, unsigned long cl)
159{
160 return xchg(clp, cl);
161}
162
163static inline void
164__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
165{
166 unsigned long cl;
167
168 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
169 cl = __cls_set_class(&r->class, cl);
170 if (cl)
171 q->ops->cl_ops->unbind_tcf(q, cl);
172}
173
174static inline void
175tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
176{
177 struct Qdisc *q = tp->chain->block->q;
178
179 /* Check q as it is not set for shared blocks. In that case,
180 * setting class is not supported.
181 */
182 if (!q)
183 return;
184 sch_tree_lock(q);
185 __tcf_bind_filter(q, r, base);
186 sch_tree_unlock(q);
187}
188
189static inline void
190__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
191{
192 unsigned long cl;
193
194 if ((cl = __cls_set_class(&r->class, 0)) != 0)
195 q->ops->cl_ops->unbind_tcf(q, cl);
196}
197
198static inline void
199tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
200{
201 struct Qdisc *q = tp->chain->block->q;
202
203 if (!q)
204 return;
205 __tcf_unbind_filter(q, r);
206}
207
208struct tcf_exts {
209#ifdef CONFIG_NET_CLS_ACT
210 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
211 int nr_actions;
212 struct tc_action **actions;
213 struct net *net;
214#endif
215 /* Map to export classifier specific extension TLV types to the
216 * generic extensions API. Unsupported extensions must be set to 0.
217 */
218 int action;
219 int police;
220};
221
222static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
223 int action, int police)
224{
225#ifdef CONFIG_NET_CLS_ACT
226 exts->type = 0;
227 exts->nr_actions = 0;
228 exts->net = net;
229 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
230 GFP_KERNEL);
231 if (!exts->actions)
232 return -ENOMEM;
233#endif
234 exts->action = action;
235 exts->police = police;
236 return 0;
237}
238
239/* Return false if the netns is being destroyed in cleanup_net(). Callers
240 * need to do cleanup synchronously in this case, otherwise may race with
241 * tc_action_net_exit(). Return true for other cases.
242 */
243static inline bool tcf_exts_get_net(struct tcf_exts *exts)
244{
245#ifdef CONFIG_NET_CLS_ACT
246 exts->net = maybe_get_net(exts->net);
247 return exts->net != NULL;
248#else
249 return true;
250#endif
251}
252
253static inline void tcf_exts_put_net(struct tcf_exts *exts)
254{
255#ifdef CONFIG_NET_CLS_ACT
256 if (exts->net)
257 put_net(exts->net);
258#endif
259}
260
261#ifdef CONFIG_NET_CLS_ACT
262#define tcf_exts_for_each_action(i, a, exts) \
263 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
264#else
265#define tcf_exts_for_each_action(i, a, exts) \
266 for (; 0; (void)(i), (void)(a), (void)(exts))
267#endif
268
269static inline void
270tcf_exts_stats_update(const struct tcf_exts *exts,
271 u64 bytes, u64 packets, u64 drops, u64 lastuse,
272 u8 used_hw_stats, bool used_hw_stats_valid)
273{
274#ifdef CONFIG_NET_CLS_ACT
275 int i;
276
277 preempt_disable();
278
279 for (i = 0; i < exts->nr_actions; i++) {
280 struct tc_action *a = exts->actions[i];
281
282 tcf_action_stats_update(a, bytes, packets, drops,
283 lastuse, true);
284 a->used_hw_stats = used_hw_stats;
285 a->used_hw_stats_valid = used_hw_stats_valid;
286 }
287
288 preempt_enable();
289#endif
290}
291
292/**
293 * tcf_exts_has_actions - check if at least one action is present
294 * @exts: tc filter extensions handle
295 *
296 * Returns true if at least one action is present.
297 */
298static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
299{
300#ifdef CONFIG_NET_CLS_ACT
301 return exts->nr_actions;
302#else
303 return false;
304#endif
305}
306
307/**
308 * tcf_exts_exec - execute tc filter extensions
309 * @skb: socket buffer
310 * @exts: tc filter extensions handle
311 * @res: desired result
312 *
313 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
314 * a negative number if the filter must be considered unmatched or
315 * a positive action code (TC_ACT_*) which must be returned to the
316 * underlying layer.
317 */
318static inline int
319tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
320 struct tcf_result *res)
321{
322#ifdef CONFIG_NET_CLS_ACT
323 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
324#endif
325 return TC_ACT_OK;
326}
327
328int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
329 struct nlattr **tb, struct nlattr *rate_tlv,
330 struct tcf_exts *exts, bool ovr, bool rtnl_held,
331 struct netlink_ext_ack *extack);
332void tcf_exts_destroy(struct tcf_exts *exts);
333void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
334int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
335int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
336int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
337
338/**
339 * struct tcf_pkt_info - packet information
340 */
341struct tcf_pkt_info {
342 unsigned char * ptr;
343 int nexthdr;
344};
345
346#ifdef CONFIG_NET_EMATCH
347
348struct tcf_ematch_ops;
349
350/**
351 * struct tcf_ematch - extended match (ematch)
352 *
353 * @matchid: identifier to allow userspace to reidentify a match
354 * @flags: flags specifying attributes and the relation to other matches
355 * @ops: the operations lookup table of the corresponding ematch module
356 * @datalen: length of the ematch specific configuration data
357 * @data: ematch specific data
358 */
359struct tcf_ematch {
360 struct tcf_ematch_ops * ops;
361 unsigned long data;
362 unsigned int datalen;
363 u16 matchid;
364 u16 flags;
365 struct net *net;
366};
367
368static inline int tcf_em_is_container(struct tcf_ematch *em)
369{
370 return !em->ops;
371}
372
373static inline int tcf_em_is_simple(struct tcf_ematch *em)
374{
375 return em->flags & TCF_EM_SIMPLE;
376}
377
378static inline int tcf_em_is_inverted(struct tcf_ematch *em)
379{
380 return em->flags & TCF_EM_INVERT;
381}
382
383static inline int tcf_em_last_match(struct tcf_ematch *em)
384{
385 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
386}
387
388static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
389{
390 if (tcf_em_last_match(em))
391 return 1;
392
393 if (result == 0 && em->flags & TCF_EM_REL_AND)
394 return 1;
395
396 if (result != 0 && em->flags & TCF_EM_REL_OR)
397 return 1;
398
399 return 0;
400}
401
402/**
403 * struct tcf_ematch_tree - ematch tree handle
404 *
405 * @hdr: ematch tree header supplied by userspace
406 * @matches: array of ematches
407 */
408struct tcf_ematch_tree {
409 struct tcf_ematch_tree_hdr hdr;
410 struct tcf_ematch * matches;
411
412};
413
414/**
415 * struct tcf_ematch_ops - ematch module operations
416 *
417 * @kind: identifier (kind) of this ematch module
418 * @datalen: length of expected configuration data (optional)
419 * @change: called during validation (optional)
420 * @match: called during ematch tree evaluation, must return 1/0
421 * @destroy: called during destroyage (optional)
422 * @dump: called during dumping process (optional)
423 * @owner: owner, must be set to THIS_MODULE
424 * @link: link to previous/next ematch module (internal use)
425 */
426struct tcf_ematch_ops {
427 int kind;
428 int datalen;
429 int (*change)(struct net *net, void *,
430 int, struct tcf_ematch *);
431 int (*match)(struct sk_buff *, struct tcf_ematch *,
432 struct tcf_pkt_info *);
433 void (*destroy)(struct tcf_ematch *);
434 int (*dump)(struct sk_buff *, struct tcf_ematch *);
435 struct module *owner;
436 struct list_head link;
437};
438
439int tcf_em_register(struct tcf_ematch_ops *);
440void tcf_em_unregister(struct tcf_ematch_ops *);
441int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
442 struct tcf_ematch_tree *);
443void tcf_em_tree_destroy(struct tcf_ematch_tree *);
444int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
445int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
446 struct tcf_pkt_info *);
447
448/**
449 * tcf_em_tree_match - evaulate an ematch tree
450 *
451 * @skb: socket buffer of the packet in question
452 * @tree: ematch tree to be used for evaluation
453 * @info: packet information examined by classifier
454 *
455 * This function matches @skb against the ematch tree in @tree by going
456 * through all ematches respecting their logic relations returning
457 * as soon as the result is obvious.
458 *
459 * Returns 1 if the ematch tree as-one matches, no ematches are configured
460 * or ematch is not enabled in the kernel, otherwise 0 is returned.
461 */
462static inline int tcf_em_tree_match(struct sk_buff *skb,
463 struct tcf_ematch_tree *tree,
464 struct tcf_pkt_info *info)
465{
466 if (tree->hdr.nmatches)
467 return __tcf_em_tree_match(skb, tree, info);
468 else
469 return 1;
470}
471
472#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
473
474#else /* CONFIG_NET_EMATCH */
475
476struct tcf_ematch_tree {
477};
478
479#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
480#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
481#define tcf_em_tree_dump(skb, t, tlv) (0)
482#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
483
484#endif /* CONFIG_NET_EMATCH */
485
486static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
487{
488 switch (layer) {
489 case TCF_LAYER_LINK:
490 return skb_mac_header(skb);
491 case TCF_LAYER_NETWORK:
492 return skb_network_header(skb);
493 case TCF_LAYER_TRANSPORT:
494 return skb_transport_header(skb);
495 }
496
497 return NULL;
498}
499
500static inline int tcf_valid_offset(const struct sk_buff *skb,
501 const unsigned char *ptr, const int len)
502{
503 return likely((ptr + len) <= skb_tail_pointer(skb) &&
504 ptr >= skb->head &&
505 (ptr <= (ptr + len)));
506}
507
508static inline int
509tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
510 struct netlink_ext_ack *extack)
511{
512 char indev[IFNAMSIZ];
513 struct net_device *dev;
514
515 if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
516 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
517 "Interface name too long");
518 return -EINVAL;
519 }
520 dev = __dev_get_by_name(net, indev);
521 if (!dev) {
522 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
523 "Network device not found");
524 return -ENODEV;
525 }
526 return dev->ifindex;
527}
528
529static inline bool
530tcf_match_indev(struct sk_buff *skb, int ifindex)
531{
532 if (!ifindex)
533 return true;
534 if (!skb->skb_iif)
535 return false;
536 return ifindex == skb->skb_iif;
537}
538
539int tc_setup_flow_action(struct flow_action *flow_action,
540 const struct tcf_exts *exts);
541void tc_cleanup_flow_action(struct flow_action *flow_action);
542
543int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
544 void *type_data, bool err_stop, bool rtnl_held);
545int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
546 enum tc_setup_type type, void *type_data, bool err_stop,
547 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
548int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
549 enum tc_setup_type type, void *type_data, bool err_stop,
550 u32 *old_flags, unsigned int *old_in_hw_count,
551 u32 *new_flags, unsigned int *new_in_hw_count,
552 bool rtnl_held);
553int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
554 enum tc_setup_type type, void *type_data, bool err_stop,
555 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
556int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
557 bool add, flow_setup_cb_t *cb,
558 enum tc_setup_type type, void *type_data,
559 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
560unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
561
562#ifdef CONFIG_NET_CLS_ACT
563int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
564 enum flow_block_binder_type binder_type,
565 struct nlattr *block_index_attr,
566 struct netlink_ext_ack *extack);
567void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
568int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
569 struct netlink_ext_ack *extack);
570struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
571 struct sk_buff **to_free, int *ret);
572int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
573#else
574static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
575 enum flow_block_binder_type binder_type,
576 struct nlattr *block_index_attr,
577 struct netlink_ext_ack *extack)
578{
579 return 0;
580}
581
582static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
583{
584}
585
586static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
587 struct netlink_ext_ack *extack)
588{
589 return 0;
590}
591
592static inline struct sk_buff *
593tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
594 struct sk_buff **to_free, int *ret)
595{
596 return skb;
597}
598
599static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
600{
601 return 0;
602}
603#endif
604
605struct tc_cls_u32_knode {
606 struct tcf_exts *exts;
607 struct tcf_result *res;
608 struct tc_u32_sel *sel;
609 u32 handle;
610 u32 val;
611 u32 mask;
612 u32 link_handle;
613 u8 fshift;
614};
615
616struct tc_cls_u32_hnode {
617 u32 handle;
618 u32 prio;
619 unsigned int divisor;
620};
621
622enum tc_clsu32_command {
623 TC_CLSU32_NEW_KNODE,
624 TC_CLSU32_REPLACE_KNODE,
625 TC_CLSU32_DELETE_KNODE,
626 TC_CLSU32_NEW_HNODE,
627 TC_CLSU32_REPLACE_HNODE,
628 TC_CLSU32_DELETE_HNODE,
629};
630
631struct tc_cls_u32_offload {
632 struct flow_cls_common_offload common;
633 /* knode values */
634 enum tc_clsu32_command command;
635 union {
636 struct tc_cls_u32_knode knode;
637 struct tc_cls_u32_hnode hnode;
638 };
639};
640
641static inline bool tc_can_offload(const struct net_device *dev)
642{
643 return dev->features & NETIF_F_HW_TC;
644}
645
646static inline bool tc_can_offload_extack(const struct net_device *dev,
647 struct netlink_ext_ack *extack)
648{
649 bool can = tc_can_offload(dev);
650
651 if (!can)
652 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
653
654 return can;
655}
656
657static inline bool
658tc_cls_can_offload_and_chain0(const struct net_device *dev,
659 struct flow_cls_common_offload *common)
660{
661 if (!tc_can_offload_extack(dev, common->extack))
662 return false;
663 if (common->chain_index) {
664 NL_SET_ERR_MSG(common->extack,
665 "Driver supports only offload of chain 0");
666 return false;
667 }
668 return true;
669}
670
671static inline bool tc_skip_hw(u32 flags)
672{
673 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
674}
675
676static inline bool tc_skip_sw(u32 flags)
677{
678 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
679}
680
681/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
682static inline bool tc_flags_valid(u32 flags)
683{
684 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
685 TCA_CLS_FLAGS_VERBOSE))
686 return false;
687
688 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
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 flow_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 >> 16;
708 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
709 cls_common->extack = extack;
710}
711
712enum tc_matchall_command {
713 TC_CLSMATCHALL_REPLACE,
714 TC_CLSMATCHALL_DESTROY,
715 TC_CLSMATCHALL_STATS,
716};
717
718struct tc_cls_matchall_offload {
719 struct flow_cls_common_offload common;
720 enum tc_matchall_command command;
721 struct flow_rule *rule;
722 struct flow_stats stats;
723 unsigned long cookie;
724};
725
726enum tc_clsbpf_command {
727 TC_CLSBPF_OFFLOAD,
728 TC_CLSBPF_STATS,
729};
730
731struct tc_cls_bpf_offload {
732 struct flow_cls_common_offload common;
733 enum tc_clsbpf_command command;
734 struct tcf_exts *exts;
735 struct bpf_prog *prog;
736 struct bpf_prog *oldprog;
737 const char *name;
738 bool exts_integrated;
739};
740
741struct tc_mqprio_qopt_offload {
742 /* struct tc_mqprio_qopt must always be the first element */
743 struct tc_mqprio_qopt qopt;
744 u16 mode;
745 u16 shaper;
746 u32 flags;
747 u64 min_rate[TC_QOPT_MAX_QUEUE];
748 u64 max_rate[TC_QOPT_MAX_QUEUE];
749};
750
751/* This structure holds cookie structure that is passed from user
752 * to the kernel for actions and classifiers
753 */
754struct tc_cookie {
755 u8 *data;
756 u32 len;
757 struct rcu_head rcu;
758};
759
760struct tc_qopt_offload_stats {
761 struct gnet_stats_basic_packed *bstats;
762 struct gnet_stats_queue *qstats;
763};
764
765enum tc_mq_command {
766 TC_MQ_CREATE,
767 TC_MQ_DESTROY,
768 TC_MQ_STATS,
769 TC_MQ_GRAFT,
770};
771
772struct tc_mq_opt_offload_graft_params {
773 unsigned long queue;
774 u32 child_handle;
775};
776
777struct tc_mq_qopt_offload {
778 enum tc_mq_command command;
779 u32 handle;
780 union {
781 struct tc_qopt_offload_stats stats;
782 struct tc_mq_opt_offload_graft_params graft_params;
783 };
784};
785
786enum tc_red_command {
787 TC_RED_REPLACE,
788 TC_RED_DESTROY,
789 TC_RED_STATS,
790 TC_RED_XSTATS,
791 TC_RED_GRAFT,
792};
793
794struct tc_red_qopt_offload_params {
795 u32 min;
796 u32 max;
797 u32 probability;
798 u32 limit;
799 bool is_ecn;
800 bool is_harddrop;
801 bool is_nodrop;
802 struct gnet_stats_queue *qstats;
803};
804
805struct tc_red_qopt_offload {
806 enum tc_red_command command;
807 u32 handle;
808 u32 parent;
809 union {
810 struct tc_red_qopt_offload_params set;
811 struct tc_qopt_offload_stats stats;
812 struct red_stats *xstats;
813 u32 child_handle;
814 };
815};
816
817enum tc_gred_command {
818 TC_GRED_REPLACE,
819 TC_GRED_DESTROY,
820 TC_GRED_STATS,
821};
822
823struct tc_gred_vq_qopt_offload_params {
824 bool present;
825 u32 limit;
826 u32 prio;
827 u32 min;
828 u32 max;
829 bool is_ecn;
830 bool is_harddrop;
831 u32 probability;
832 /* Only need backlog, see struct tc_prio_qopt_offload_params */
833 u32 *backlog;
834};
835
836struct tc_gred_qopt_offload_params {
837 bool grio_on;
838 bool wred_on;
839 unsigned int dp_cnt;
840 unsigned int dp_def;
841 struct gnet_stats_queue *qstats;
842 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
843};
844
845struct tc_gred_qopt_offload_stats {
846 struct gnet_stats_basic_packed bstats[MAX_DPs];
847 struct gnet_stats_queue qstats[MAX_DPs];
848 struct red_stats *xstats[MAX_DPs];
849};
850
851struct tc_gred_qopt_offload {
852 enum tc_gred_command command;
853 u32 handle;
854 u32 parent;
855 union {
856 struct tc_gred_qopt_offload_params set;
857 struct tc_gred_qopt_offload_stats stats;
858 };
859};
860
861enum tc_prio_command {
862 TC_PRIO_REPLACE,
863 TC_PRIO_DESTROY,
864 TC_PRIO_STATS,
865 TC_PRIO_GRAFT,
866};
867
868struct tc_prio_qopt_offload_params {
869 int bands;
870 u8 priomap[TC_PRIO_MAX + 1];
871 /* At the point of un-offloading the Qdisc, the reported backlog and
872 * qlen need to be reduced by the portion that is in HW.
873 */
874 struct gnet_stats_queue *qstats;
875};
876
877struct tc_prio_qopt_offload_graft_params {
878 u8 band;
879 u32 child_handle;
880};
881
882struct tc_prio_qopt_offload {
883 enum tc_prio_command command;
884 u32 handle;
885 u32 parent;
886 union {
887 struct tc_prio_qopt_offload_params replace_params;
888 struct tc_qopt_offload_stats stats;
889 struct tc_prio_qopt_offload_graft_params graft_params;
890 };
891};
892
893enum tc_root_command {
894 TC_ROOT_GRAFT,
895};
896
897struct tc_root_qopt_offload {
898 enum tc_root_command command;
899 u32 handle;
900 bool ingress;
901};
902
903enum tc_ets_command {
904 TC_ETS_REPLACE,
905 TC_ETS_DESTROY,
906 TC_ETS_STATS,
907 TC_ETS_GRAFT,
908};
909
910struct tc_ets_qopt_offload_replace_params {
911 unsigned int bands;
912 u8 priomap[TC_PRIO_MAX + 1];
913 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
914 unsigned int weights[TCQ_ETS_MAX_BANDS];
915 struct gnet_stats_queue *qstats;
916};
917
918struct tc_ets_qopt_offload_graft_params {
919 u8 band;
920 u32 child_handle;
921};
922
923struct tc_ets_qopt_offload {
924 enum tc_ets_command command;
925 u32 handle;
926 u32 parent;
927 union {
928 struct tc_ets_qopt_offload_replace_params replace_params;
929 struct tc_qopt_offload_stats stats;
930 struct tc_ets_qopt_offload_graft_params graft_params;
931 };
932};
933
934enum tc_tbf_command {
935 TC_TBF_REPLACE,
936 TC_TBF_DESTROY,
937 TC_TBF_STATS,
938};
939
940struct tc_tbf_qopt_offload_replace_params {
941 struct psched_ratecfg rate;
942 u32 max_size;
943 struct gnet_stats_queue *qstats;
944};
945
946struct tc_tbf_qopt_offload {
947 enum tc_tbf_command command;
948 u32 handle;
949 u32 parent;
950 union {
951 struct tc_tbf_qopt_offload_replace_params replace_params;
952 struct tc_qopt_offload_stats stats;
953 };
954};
955
956enum tc_fifo_command {
957 TC_FIFO_REPLACE,
958 TC_FIFO_DESTROY,
959 TC_FIFO_STATS,
960};
961
962struct tc_fifo_qopt_offload {
963 enum tc_fifo_command command;
964 u32 handle;
965 u32 parent;
966 union {
967 struct tc_qopt_offload_stats stats;
968 };
969};
970
971#endif