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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);
26void 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);
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);
62int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action,
63 int police, struct tcf_proto *tp, u32 handle, bool used_action_miss);
64
65static inline bool tcf_block_shared(struct tcf_block *block)
66{
67 return block->index;
68}
69
70static inline bool tcf_block_non_null_shared(struct tcf_block *block)
71{
72 return block && block->index;
73}
74
75static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
76{
77 WARN_ON(tcf_block_shared(block));
78 return block->q;
79}
80
81int tcf_classify(struct sk_buff *skb,
82 const struct tcf_block *block,
83 const struct tcf_proto *tp, struct tcf_result *res,
84 bool compat_mode);
85
86static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
87 struct tcf_walker *arg,
88 void *filter)
89{
90 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
91 arg->stop = 1;
92 return false;
93 }
94
95 arg->count++;
96 return true;
97}
98
99#else
100static inline bool tcf_block_shared(struct tcf_block *block)
101{
102 return false;
103}
104
105static inline bool tcf_block_non_null_shared(struct tcf_block *block)
106{
107 return false;
108}
109
110static inline
111int tcf_block_get(struct tcf_block **p_block,
112 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
113 struct netlink_ext_ack *extack)
114{
115 return 0;
116}
117
118static inline
119int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
120 struct tcf_block_ext_info *ei,
121 struct netlink_ext_ack *extack)
122{
123 return 0;
124}
125
126static inline void tcf_block_put(struct tcf_block *block)
127{
128}
129
130static inline
131void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
132 struct tcf_block_ext_info *ei)
133{
134}
135
136static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
137{
138 return NULL;
139}
140
141static inline int tcf_classify(struct sk_buff *skb,
142 const struct tcf_block *block,
143 const struct tcf_proto *tp,
144 struct tcf_result *res, bool compat_mode)
145{
146 return TC_ACT_UNSPEC;
147}
148
149#endif
150
151static inline unsigned long
152__cls_set_class(unsigned long *clp, unsigned long cl)
153{
154 return xchg(clp, cl);
155}
156
157static inline void
158__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
159{
160 unsigned long cl;
161
162 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
163 cl = __cls_set_class(&r->class, cl);
164 if (cl)
165 q->ops->cl_ops->unbind_tcf(q, cl);
166}
167
168static inline void
169tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
170{
171 struct Qdisc *q = tp->chain->block->q;
172
173 /* Check q as it is not set for shared blocks. In that case,
174 * setting class is not supported.
175 */
176 if (!q)
177 return;
178 sch_tree_lock(q);
179 __tcf_bind_filter(q, r, base);
180 sch_tree_unlock(q);
181}
182
183static inline void
184__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
185{
186 unsigned long cl;
187
188 if ((cl = __cls_set_class(&r->class, 0)) != 0)
189 q->ops->cl_ops->unbind_tcf(q, cl);
190}
191
192static inline void
193tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
194{
195 struct Qdisc *q = tp->chain->block->q;
196
197 if (!q)
198 return;
199 __tcf_unbind_filter(q, r);
200}
201
202static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
203 void *q, struct tcf_result *res,
204 unsigned long base)
205{
206 if (res->classid == classid) {
207 if (cl)
208 __tcf_bind_filter(q, res, base);
209 else
210 __tcf_unbind_filter(q, res);
211 }
212}
213
214struct tcf_exts {
215#ifdef CONFIG_NET_CLS_ACT
216 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
217 int nr_actions;
218 struct tc_action **actions;
219 struct net *net;
220 netns_tracker ns_tracker;
221 struct tcf_exts_miss_cookie_node *miss_cookie_node;
222#endif
223 /* Map to export classifier specific extension TLV types to the
224 * generic extensions API. Unsupported extensions must be set to 0.
225 */
226 int action;
227 int police;
228};
229
230static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
231 int action, int police)
232{
233#ifdef CONFIG_NET_CLS
234 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false);
235#else
236 return -EOPNOTSUPP;
237#endif
238}
239
240/* Return false if the netns is being destroyed in cleanup_net(). Callers
241 * need to do cleanup synchronously in this case, otherwise may race with
242 * tc_action_net_exit(). Return true for other cases.
243 */
244static inline bool tcf_exts_get_net(struct tcf_exts *exts)
245{
246#ifdef CONFIG_NET_CLS_ACT
247 exts->net = maybe_get_net(exts->net);
248 if (exts->net)
249 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
250 return exts->net != NULL;
251#else
252 return true;
253#endif
254}
255
256static inline void tcf_exts_put_net(struct tcf_exts *exts)
257{
258#ifdef CONFIG_NET_CLS_ACT
259 if (exts->net)
260 put_net_track(exts->net, &exts->ns_tracker);
261#endif
262}
263
264#ifdef CONFIG_NET_CLS_ACT
265#define tcf_exts_for_each_action(i, a, exts) \
266 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
267#else
268#define tcf_exts_for_each_action(i, a, exts) \
269 for (; 0; (void)(i), (void)(a), (void)(exts))
270#endif
271
272#define tcf_act_for_each_action(i, a, actions) \
273 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
274
275static inline bool tc_act_in_hw(struct tc_action *act)
276{
277 return !!act->in_hw_count;
278}
279
280static inline void
281tcf_exts_hw_stats_update(const struct tcf_exts *exts,
282 struct flow_stats *stats,
283 bool use_act_stats)
284{
285#ifdef CONFIG_NET_CLS_ACT
286 int i;
287
288 for (i = 0; i < exts->nr_actions; i++) {
289 struct tc_action *a = exts->actions[i];
290
291 if (use_act_stats || tc_act_in_hw(a)) {
292 if (!tcf_action_update_hw_stats(a))
293 continue;
294 }
295
296 preempt_disable();
297 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops,
298 stats->lastused, true);
299 preempt_enable();
300
301 a->used_hw_stats = stats->used_hw_stats;
302 a->used_hw_stats_valid = stats->used_hw_stats_valid;
303 }
304#endif
305}
306
307/**
308 * tcf_exts_has_actions - check if at least one action is present
309 * @exts: tc filter extensions handle
310 *
311 * Returns true if at least one action is present.
312 */
313static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
314{
315#ifdef CONFIG_NET_CLS_ACT
316 return exts->nr_actions;
317#else
318 return false;
319#endif
320}
321
322/**
323 * tcf_exts_exec - execute tc filter extensions
324 * @skb: socket buffer
325 * @exts: tc filter extensions handle
326 * @res: desired result
327 *
328 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
329 * a negative number if the filter must be considered unmatched or
330 * a positive action code (TC_ACT_*) which must be returned to the
331 * underlying layer.
332 */
333static inline int
334tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
335 struct tcf_result *res)
336{
337#ifdef CONFIG_NET_CLS_ACT
338 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
339#endif
340 return TC_ACT_OK;
341}
342
343static inline int
344tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
345 struct tcf_result *res)
346{
347#ifdef CONFIG_NET_CLS_ACT
348 return tcf_action_exec(skb, exts->actions + act_index,
349 exts->nr_actions - act_index, res);
350#else
351 return TC_ACT_OK;
352#endif
353}
354
355int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
356 struct nlattr **tb, struct nlattr *rate_tlv,
357 struct tcf_exts *exts, u32 flags,
358 struct netlink_ext_ack *extack);
359int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
360 struct nlattr *rate_tlv, struct tcf_exts *exts,
361 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
362void tcf_exts_destroy(struct tcf_exts *exts);
363void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
364int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
365int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
366int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
367
368/**
369 * struct tcf_pkt_info - packet information
370 *
371 * @ptr: start of the pkt data
372 * @nexthdr: offset of the next header
373 */
374struct tcf_pkt_info {
375 unsigned char * ptr;
376 int nexthdr;
377};
378
379#ifdef CONFIG_NET_EMATCH
380
381struct tcf_ematch_ops;
382
383/**
384 * struct tcf_ematch - extended match (ematch)
385 *
386 * @matchid: identifier to allow userspace to reidentify a match
387 * @flags: flags specifying attributes and the relation to other matches
388 * @ops: the operations lookup table of the corresponding ematch module
389 * @datalen: length of the ematch specific configuration data
390 * @data: ematch specific data
391 * @net: the network namespace
392 */
393struct tcf_ematch {
394 struct tcf_ematch_ops * ops;
395 unsigned long data;
396 unsigned int datalen;
397 u16 matchid;
398 u16 flags;
399 struct net *net;
400};
401
402static inline int tcf_em_is_container(struct tcf_ematch *em)
403{
404 return !em->ops;
405}
406
407static inline int tcf_em_is_simple(struct tcf_ematch *em)
408{
409 return em->flags & TCF_EM_SIMPLE;
410}
411
412static inline int tcf_em_is_inverted(struct tcf_ematch *em)
413{
414 return em->flags & TCF_EM_INVERT;
415}
416
417static inline int tcf_em_last_match(struct tcf_ematch *em)
418{
419 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
420}
421
422static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
423{
424 if (tcf_em_last_match(em))
425 return 1;
426
427 if (result == 0 && em->flags & TCF_EM_REL_AND)
428 return 1;
429
430 if (result != 0 && em->flags & TCF_EM_REL_OR)
431 return 1;
432
433 return 0;
434}
435
436/**
437 * struct tcf_ematch_tree - ematch tree handle
438 *
439 * @hdr: ematch tree header supplied by userspace
440 * @matches: array of ematches
441 */
442struct tcf_ematch_tree {
443 struct tcf_ematch_tree_hdr hdr;
444 struct tcf_ematch * matches;
445
446};
447
448/**
449 * struct tcf_ematch_ops - ematch module operations
450 *
451 * @kind: identifier (kind) of this ematch module
452 * @datalen: length of expected configuration data (optional)
453 * @change: called during validation (optional)
454 * @match: called during ematch tree evaluation, must return 1/0
455 * @destroy: called during destroyage (optional)
456 * @dump: called during dumping process (optional)
457 * @owner: owner, must be set to THIS_MODULE
458 * @link: link to previous/next ematch module (internal use)
459 */
460struct tcf_ematch_ops {
461 int kind;
462 int datalen;
463 int (*change)(struct net *net, void *,
464 int, struct tcf_ematch *);
465 int (*match)(struct sk_buff *, struct tcf_ematch *,
466 struct tcf_pkt_info *);
467 void (*destroy)(struct tcf_ematch *);
468 int (*dump)(struct sk_buff *, struct tcf_ematch *);
469 struct module *owner;
470 struct list_head link;
471};
472
473int tcf_em_register(struct tcf_ematch_ops *);
474void tcf_em_unregister(struct tcf_ematch_ops *);
475int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
476 struct tcf_ematch_tree *);
477void tcf_em_tree_destroy(struct tcf_ematch_tree *);
478int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
479int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
480 struct tcf_pkt_info *);
481
482/**
483 * tcf_em_tree_match - evaulate an ematch tree
484 *
485 * @skb: socket buffer of the packet in question
486 * @tree: ematch tree to be used for evaluation
487 * @info: packet information examined by classifier
488 *
489 * This function matches @skb against the ematch tree in @tree by going
490 * through all ematches respecting their logic relations returning
491 * as soon as the result is obvious.
492 *
493 * Returns 1 if the ematch tree as-one matches, no ematches are configured
494 * or ematch is not enabled in the kernel, otherwise 0 is returned.
495 */
496static inline int tcf_em_tree_match(struct sk_buff *skb,
497 struct tcf_ematch_tree *tree,
498 struct tcf_pkt_info *info)
499{
500 if (tree->hdr.nmatches)
501 return __tcf_em_tree_match(skb, tree, info);
502 else
503 return 1;
504}
505
506#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
507
508#else /* CONFIG_NET_EMATCH */
509
510struct tcf_ematch_tree {
511};
512
513#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
514#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
515#define tcf_em_tree_dump(skb, t, tlv) (0)
516#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
517
518#endif /* CONFIG_NET_EMATCH */
519
520static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
521{
522 switch (layer) {
523 case TCF_LAYER_LINK:
524 return skb_mac_header(skb);
525 case TCF_LAYER_NETWORK:
526 return skb_network_header(skb);
527 case TCF_LAYER_TRANSPORT:
528 return skb_transport_header(skb);
529 }
530
531 return NULL;
532}
533
534static inline int tcf_valid_offset(const struct sk_buff *skb,
535 const unsigned char *ptr, const int len)
536{
537 return likely((ptr + len) <= skb_tail_pointer(skb) &&
538 ptr >= skb->head &&
539 (ptr <= (ptr + len)));
540}
541
542static inline int
543tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
544 struct netlink_ext_ack *extack)
545{
546 char indev[IFNAMSIZ];
547 struct net_device *dev;
548
549 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
550 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
551 "Interface name too long");
552 return -EINVAL;
553 }
554 dev = __dev_get_by_name(net, indev);
555 if (!dev) {
556 NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
557 "Network device not found");
558 return -ENODEV;
559 }
560 return dev->ifindex;
561}
562
563static inline bool
564tcf_match_indev(struct sk_buff *skb, int ifindex)
565{
566 if (!ifindex)
567 return true;
568 if (!skb->skb_iif)
569 return false;
570 return ifindex == skb->skb_iif;
571}
572
573int tc_setup_offload_action(struct flow_action *flow_action,
574 const struct tcf_exts *exts,
575 struct netlink_ext_ack *extack);
576void tc_cleanup_offload_action(struct flow_action *flow_action);
577int tc_setup_action(struct flow_action *flow_action,
578 struct tc_action *actions[],
579 u32 miss_cookie_base,
580 struct netlink_ext_ack *extack);
581
582int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
583 void *type_data, bool err_stop, bool rtnl_held);
584int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
585 enum tc_setup_type type, void *type_data, bool err_stop,
586 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
587int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
588 enum tc_setup_type type, void *type_data, bool err_stop,
589 u32 *old_flags, unsigned int *old_in_hw_count,
590 u32 *new_flags, unsigned int *new_in_hw_count,
591 bool rtnl_held);
592int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
593 enum tc_setup_type type, void *type_data, bool err_stop,
594 u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
595int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
596 bool add, flow_setup_cb_t *cb,
597 enum tc_setup_type type, void *type_data,
598 void *cb_priv, u32 *flags, unsigned int *in_hw_count);
599unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
600
601#ifdef CONFIG_NET_CLS_ACT
602int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
603 enum flow_block_binder_type binder_type,
604 struct nlattr *block_index_attr,
605 struct netlink_ext_ack *extack);
606void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
607int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
608 struct netlink_ext_ack *extack);
609struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
610 struct sk_buff **to_free, int *ret);
611int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
612#else
613static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
614 enum flow_block_binder_type binder_type,
615 struct nlattr *block_index_attr,
616 struct netlink_ext_ack *extack)
617{
618 return 0;
619}
620
621static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
622{
623}
624
625static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
626 struct netlink_ext_ack *extack)
627{
628 return 0;
629}
630
631static inline struct sk_buff *
632tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
633 struct sk_buff **to_free, int *ret)
634{
635 return skb;
636}
637
638static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
639{
640 return 0;
641}
642#endif
643
644struct tc_cls_u32_knode {
645 struct tcf_exts *exts;
646 struct tcf_result *res;
647 struct tc_u32_sel *sel;
648 u32 handle;
649 u32 val;
650 u32 mask;
651 u32 link_handle;
652 u8 fshift;
653};
654
655struct tc_cls_u32_hnode {
656 u32 handle;
657 u32 prio;
658 unsigned int divisor;
659};
660
661enum tc_clsu32_command {
662 TC_CLSU32_NEW_KNODE,
663 TC_CLSU32_REPLACE_KNODE,
664 TC_CLSU32_DELETE_KNODE,
665 TC_CLSU32_NEW_HNODE,
666 TC_CLSU32_REPLACE_HNODE,
667 TC_CLSU32_DELETE_HNODE,
668};
669
670struct tc_cls_u32_offload {
671 struct flow_cls_common_offload common;
672 /* knode values */
673 enum tc_clsu32_command command;
674 union {
675 struct tc_cls_u32_knode knode;
676 struct tc_cls_u32_hnode hnode;
677 };
678};
679
680static inline bool tc_can_offload(const struct net_device *dev)
681{
682 return dev->features & NETIF_F_HW_TC;
683}
684
685static inline bool tc_can_offload_extack(const struct net_device *dev,
686 struct netlink_ext_ack *extack)
687{
688 bool can = tc_can_offload(dev);
689
690 if (!can)
691 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
692
693 return can;
694}
695
696static inline bool
697tc_cls_can_offload_and_chain0(const struct net_device *dev,
698 struct flow_cls_common_offload *common)
699{
700 if (!tc_can_offload_extack(dev, common->extack))
701 return false;
702 if (common->chain_index) {
703 NL_SET_ERR_MSG(common->extack,
704 "Driver supports only offload of chain 0");
705 return false;
706 }
707 return true;
708}
709
710static inline bool tc_skip_hw(u32 flags)
711{
712 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
713}
714
715static inline bool tc_skip_sw(u32 flags)
716{
717 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
718}
719
720/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
721static inline bool tc_flags_valid(u32 flags)
722{
723 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
724 TCA_CLS_FLAGS_VERBOSE))
725 return false;
726
727 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
728 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
729 return false;
730
731 return true;
732}
733
734static inline bool tc_in_hw(u32 flags)
735{
736 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
737}
738
739static inline void
740tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
741 const struct tcf_proto *tp, u32 flags,
742 struct netlink_ext_ack *extack)
743{
744 cls_common->chain_index = tp->chain->index;
745 cls_common->protocol = tp->protocol;
746 cls_common->prio = tp->prio >> 16;
747 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
748 cls_common->extack = extack;
749}
750
751#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
752static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
753{
754 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
755
756 if (tc_skb_ext)
757 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
758 return tc_skb_ext;
759}
760#endif
761
762enum tc_matchall_command {
763 TC_CLSMATCHALL_REPLACE,
764 TC_CLSMATCHALL_DESTROY,
765 TC_CLSMATCHALL_STATS,
766};
767
768struct tc_cls_matchall_offload {
769 struct flow_cls_common_offload common;
770 enum tc_matchall_command command;
771 struct flow_rule *rule;
772 struct flow_stats stats;
773 bool use_act_stats;
774 unsigned long cookie;
775};
776
777enum tc_clsbpf_command {
778 TC_CLSBPF_OFFLOAD,
779 TC_CLSBPF_STATS,
780};
781
782struct tc_cls_bpf_offload {
783 struct flow_cls_common_offload common;
784 enum tc_clsbpf_command command;
785 struct tcf_exts *exts;
786 struct bpf_prog *prog;
787 struct bpf_prog *oldprog;
788 const char *name;
789 bool exts_integrated;
790};
791
792/* This structure holds cookie structure that is passed from user
793 * to the kernel for actions and classifiers
794 */
795struct tc_cookie {
796 u8 *data;
797 u32 len;
798 struct rcu_head rcu;
799};
800
801struct tc_qopt_offload_stats {
802 struct gnet_stats_basic_sync *bstats;
803 struct gnet_stats_queue *qstats;
804};
805
806enum tc_mq_command {
807 TC_MQ_CREATE,
808 TC_MQ_DESTROY,
809 TC_MQ_STATS,
810 TC_MQ_GRAFT,
811};
812
813struct tc_mq_opt_offload_graft_params {
814 unsigned long queue;
815 u32 child_handle;
816};
817
818struct tc_mq_qopt_offload {
819 enum tc_mq_command command;
820 u32 handle;
821 union {
822 struct tc_qopt_offload_stats stats;
823 struct tc_mq_opt_offload_graft_params graft_params;
824 };
825};
826
827enum tc_htb_command {
828 /* Root */
829 TC_HTB_CREATE, /* Initialize HTB offload. */
830 TC_HTB_DESTROY, /* Destroy HTB offload. */
831
832 /* Classes */
833 /* Allocate qid and create leaf. */
834 TC_HTB_LEAF_ALLOC_QUEUE,
835 /* Convert leaf to inner, preserve and return qid, create new leaf. */
836 TC_HTB_LEAF_TO_INNER,
837 /* Delete leaf, while siblings remain. */
838 TC_HTB_LEAF_DEL,
839 /* Delete leaf, convert parent to leaf, preserving qid. */
840 TC_HTB_LEAF_DEL_LAST,
841 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
842 TC_HTB_LEAF_DEL_LAST_FORCE,
843 /* Modify parameters of a node. */
844 TC_HTB_NODE_MODIFY,
845
846 /* Class qdisc */
847 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
848};
849
850struct tc_htb_qopt_offload {
851 struct netlink_ext_ack *extack;
852 enum tc_htb_command command;
853 u32 parent_classid;
854 u16 classid;
855 u16 qid;
856 u32 quantum;
857 u64 rate;
858 u64 ceil;
859 u8 prio;
860};
861
862#define TC_HTB_CLASSID_ROOT U32_MAX
863
864enum tc_red_command {
865 TC_RED_REPLACE,
866 TC_RED_DESTROY,
867 TC_RED_STATS,
868 TC_RED_XSTATS,
869 TC_RED_GRAFT,
870};
871
872struct tc_red_qopt_offload_params {
873 u32 min;
874 u32 max;
875 u32 probability;
876 u32 limit;
877 bool is_ecn;
878 bool is_harddrop;
879 bool is_nodrop;
880 struct gnet_stats_queue *qstats;
881};
882
883struct tc_red_qopt_offload {
884 enum tc_red_command command;
885 u32 handle;
886 u32 parent;
887 union {
888 struct tc_red_qopt_offload_params set;
889 struct tc_qopt_offload_stats stats;
890 struct red_stats *xstats;
891 u32 child_handle;
892 };
893};
894
895enum tc_gred_command {
896 TC_GRED_REPLACE,
897 TC_GRED_DESTROY,
898 TC_GRED_STATS,
899};
900
901struct tc_gred_vq_qopt_offload_params {
902 bool present;
903 u32 limit;
904 u32 prio;
905 u32 min;
906 u32 max;
907 bool is_ecn;
908 bool is_harddrop;
909 u32 probability;
910 /* Only need backlog, see struct tc_prio_qopt_offload_params */
911 u32 *backlog;
912};
913
914struct tc_gred_qopt_offload_params {
915 bool grio_on;
916 bool wred_on;
917 unsigned int dp_cnt;
918 unsigned int dp_def;
919 struct gnet_stats_queue *qstats;
920 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
921};
922
923struct tc_gred_qopt_offload_stats {
924 struct gnet_stats_basic_sync bstats[MAX_DPs];
925 struct gnet_stats_queue qstats[MAX_DPs];
926 struct red_stats *xstats[MAX_DPs];
927};
928
929struct tc_gred_qopt_offload {
930 enum tc_gred_command command;
931 u32 handle;
932 u32 parent;
933 union {
934 struct tc_gred_qopt_offload_params set;
935 struct tc_gred_qopt_offload_stats stats;
936 };
937};
938
939enum tc_prio_command {
940 TC_PRIO_REPLACE,
941 TC_PRIO_DESTROY,
942 TC_PRIO_STATS,
943 TC_PRIO_GRAFT,
944};
945
946struct tc_prio_qopt_offload_params {
947 int bands;
948 u8 priomap[TC_PRIO_MAX + 1];
949 /* At the point of un-offloading the Qdisc, the reported backlog and
950 * qlen need to be reduced by the portion that is in HW.
951 */
952 struct gnet_stats_queue *qstats;
953};
954
955struct tc_prio_qopt_offload_graft_params {
956 u8 band;
957 u32 child_handle;
958};
959
960struct tc_prio_qopt_offload {
961 enum tc_prio_command command;
962 u32 handle;
963 u32 parent;
964 union {
965 struct tc_prio_qopt_offload_params replace_params;
966 struct tc_qopt_offload_stats stats;
967 struct tc_prio_qopt_offload_graft_params graft_params;
968 };
969};
970
971enum tc_root_command {
972 TC_ROOT_GRAFT,
973};
974
975struct tc_root_qopt_offload {
976 enum tc_root_command command;
977 u32 handle;
978 bool ingress;
979};
980
981enum tc_ets_command {
982 TC_ETS_REPLACE,
983 TC_ETS_DESTROY,
984 TC_ETS_STATS,
985 TC_ETS_GRAFT,
986};
987
988struct tc_ets_qopt_offload_replace_params {
989 unsigned int bands;
990 u8 priomap[TC_PRIO_MAX + 1];
991 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
992 unsigned int weights[TCQ_ETS_MAX_BANDS];
993 struct gnet_stats_queue *qstats;
994};
995
996struct tc_ets_qopt_offload_graft_params {
997 u8 band;
998 u32 child_handle;
999};
1000
1001struct tc_ets_qopt_offload {
1002 enum tc_ets_command command;
1003 u32 handle;
1004 u32 parent;
1005 union {
1006 struct tc_ets_qopt_offload_replace_params replace_params;
1007 struct tc_qopt_offload_stats stats;
1008 struct tc_ets_qopt_offload_graft_params graft_params;
1009 };
1010};
1011
1012enum tc_tbf_command {
1013 TC_TBF_REPLACE,
1014 TC_TBF_DESTROY,
1015 TC_TBF_STATS,
1016 TC_TBF_GRAFT,
1017};
1018
1019struct tc_tbf_qopt_offload_replace_params {
1020 struct psched_ratecfg rate;
1021 u32 max_size;
1022 struct gnet_stats_queue *qstats;
1023};
1024
1025struct tc_tbf_qopt_offload {
1026 enum tc_tbf_command command;
1027 u32 handle;
1028 u32 parent;
1029 union {
1030 struct tc_tbf_qopt_offload_replace_params replace_params;
1031 struct tc_qopt_offload_stats stats;
1032 u32 child_handle;
1033 };
1034};
1035
1036enum tc_fifo_command {
1037 TC_FIFO_REPLACE,
1038 TC_FIFO_DESTROY,
1039 TC_FIFO_STATS,
1040};
1041
1042struct tc_fifo_qopt_offload {
1043 enum tc_fifo_command command;
1044 u32 handle;
1045 u32 parent;
1046 union {
1047 struct tc_qopt_offload_stats stats;
1048 };
1049};
1050
1051#ifdef CONFIG_NET_CLS_ACT
1052DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
1053void tc_skb_ext_tc_enable(void);
1054void tc_skb_ext_tc_disable(void);
1055#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
1056#else /* CONFIG_NET_CLS_ACT */
1057static inline void tc_skb_ext_tc_enable(void) { }
1058static inline void tc_skb_ext_tc_disable(void) { }
1059#define tc_skb_ext_tc_enabled() false
1060#endif
1061
1062#endif