1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/kernel.h>
3 #include <linux/slab.h>
4 #include <net/act_api.h>
5 #include <net/flow_offload.h>
6 #include <linux/rtnetlink.h>
7 #include <linux/mutex.h>
8 #include <linux/rhashtable.h>
10 struct flow_rule *flow_rule_alloc(unsigned int num_actions)
12 struct flow_rule *rule;
15 rule = kzalloc(struct_size(rule, action.entries, num_actions),
20 rule->action.num_entries = num_actions;
21 /* Pre-fill each action hw_stats with DONT_CARE.
22 * Caller can override this if it wants stats for a given action.
24 for (i = 0; i < num_actions; i++)
25 rule->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
29 EXPORT_SYMBOL(flow_rule_alloc);
31 struct flow_offload_action *offload_action_alloc(unsigned int num_actions)
33 struct flow_offload_action *fl_action;
36 fl_action = kzalloc(struct_size(fl_action, action.entries, num_actions),
41 fl_action->action.num_entries = num_actions;
42 /* Pre-fill each action hw_stats with DONT_CARE.
43 * Caller can override this if it wants stats for a given action.
45 for (i = 0; i < num_actions; i++)
46 fl_action->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
51 #define FLOW_DISSECTOR_MATCH(__rule, __type, __out) \
52 const struct flow_match *__m = &(__rule)->match; \
53 struct flow_dissector *__d = (__m)->dissector; \
55 (__out)->key = skb_flow_dissector_target(__d, __type, (__m)->key); \
56 (__out)->mask = skb_flow_dissector_target(__d, __type, (__m)->mask); \
58 void flow_rule_match_meta(const struct flow_rule *rule,
59 struct flow_match_meta *out)
61 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_META, out);
63 EXPORT_SYMBOL(flow_rule_match_meta);
65 void flow_rule_match_basic(const struct flow_rule *rule,
66 struct flow_match_basic *out)
68 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_BASIC, out);
70 EXPORT_SYMBOL(flow_rule_match_basic);
72 void flow_rule_match_control(const struct flow_rule *rule,
73 struct flow_match_control *out)
75 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CONTROL, out);
77 EXPORT_SYMBOL(flow_rule_match_control);
79 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
80 struct flow_match_eth_addrs *out)
82 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS, out);
84 EXPORT_SYMBOL(flow_rule_match_eth_addrs);
86 void flow_rule_match_vlan(const struct flow_rule *rule,
87 struct flow_match_vlan *out)
89 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_VLAN, out);
91 EXPORT_SYMBOL(flow_rule_match_vlan);
93 void flow_rule_match_cvlan(const struct flow_rule *rule,
94 struct flow_match_vlan *out)
96 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CVLAN, out);
98 EXPORT_SYMBOL(flow_rule_match_cvlan);
100 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
101 struct flow_match_ipv4_addrs *out)
103 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS, out);
105 EXPORT_SYMBOL(flow_rule_match_ipv4_addrs);
107 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
108 struct flow_match_ipv6_addrs *out)
110 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS, out);
112 EXPORT_SYMBOL(flow_rule_match_ipv6_addrs);
114 void flow_rule_match_ip(const struct flow_rule *rule,
115 struct flow_match_ip *out)
117 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_IP, out);
119 EXPORT_SYMBOL(flow_rule_match_ip);
121 void flow_rule_match_ports(const struct flow_rule *rule,
122 struct flow_match_ports *out)
124 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PORTS, out);
126 EXPORT_SYMBOL(flow_rule_match_ports);
128 void flow_rule_match_ports_range(const struct flow_rule *rule,
129 struct flow_match_ports_range *out)
131 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PORTS_RANGE, out);
133 EXPORT_SYMBOL(flow_rule_match_ports_range);
135 void flow_rule_match_tcp(const struct flow_rule *rule,
136 struct flow_match_tcp *out)
138 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_TCP, out);
140 EXPORT_SYMBOL(flow_rule_match_tcp);
142 void flow_rule_match_icmp(const struct flow_rule *rule,
143 struct flow_match_icmp *out)
145 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ICMP, out);
147 EXPORT_SYMBOL(flow_rule_match_icmp);
149 void flow_rule_match_mpls(const struct flow_rule *rule,
150 struct flow_match_mpls *out)
152 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_MPLS, out);
154 EXPORT_SYMBOL(flow_rule_match_mpls);
156 void flow_rule_match_enc_control(const struct flow_rule *rule,
157 struct flow_match_control *out)
159 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL, out);
161 EXPORT_SYMBOL(flow_rule_match_enc_control);
163 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
164 struct flow_match_ipv4_addrs *out)
166 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, out);
168 EXPORT_SYMBOL(flow_rule_match_enc_ipv4_addrs);
170 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
171 struct flow_match_ipv6_addrs *out)
173 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, out);
175 EXPORT_SYMBOL(flow_rule_match_enc_ipv6_addrs);
177 void flow_rule_match_enc_ip(const struct flow_rule *rule,
178 struct flow_match_ip *out)
180 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_IP, out);
182 EXPORT_SYMBOL(flow_rule_match_enc_ip);
184 void flow_rule_match_enc_ports(const struct flow_rule *rule,
185 struct flow_match_ports *out)
187 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_PORTS, out);
189 EXPORT_SYMBOL(flow_rule_match_enc_ports);
191 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
192 struct flow_match_enc_keyid *out)
194 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_KEYID, out);
196 EXPORT_SYMBOL(flow_rule_match_enc_keyid);
198 void flow_rule_match_enc_opts(const struct flow_rule *rule,
199 struct flow_match_enc_opts *out)
201 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_ENC_OPTS, out);
203 EXPORT_SYMBOL(flow_rule_match_enc_opts);
205 struct flow_action_cookie *flow_action_cookie_create(void *data,
209 struct flow_action_cookie *cookie;
211 cookie = kmalloc(sizeof(*cookie) + len, gfp);
214 cookie->cookie_len = len;
215 memcpy(cookie->cookie, data, len);
218 EXPORT_SYMBOL(flow_action_cookie_create);
220 void flow_action_cookie_destroy(struct flow_action_cookie *cookie)
224 EXPORT_SYMBOL(flow_action_cookie_destroy);
226 void flow_rule_match_ct(const struct flow_rule *rule,
227 struct flow_match_ct *out)
229 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_CT, out);
231 EXPORT_SYMBOL(flow_rule_match_ct);
233 void flow_rule_match_pppoe(const struct flow_rule *rule,
234 struct flow_match_pppoe *out)
236 FLOW_DISSECTOR_MATCH(rule, FLOW_DISSECTOR_KEY_PPPOE, out);
238 EXPORT_SYMBOL(flow_rule_match_pppoe);
240 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
241 void *cb_ident, void *cb_priv,
242 void (*release)(void *cb_priv))
244 struct flow_block_cb *block_cb;
246 block_cb = kzalloc(sizeof(*block_cb), GFP_KERNEL);
248 return ERR_PTR(-ENOMEM);
251 block_cb->cb_ident = cb_ident;
252 block_cb->cb_priv = cb_priv;
253 block_cb->release = release;
257 EXPORT_SYMBOL(flow_block_cb_alloc);
259 void flow_block_cb_free(struct flow_block_cb *block_cb)
261 if (block_cb->release)
262 block_cb->release(block_cb->cb_priv);
266 EXPORT_SYMBOL(flow_block_cb_free);
268 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
269 flow_setup_cb_t *cb, void *cb_ident)
271 struct flow_block_cb *block_cb;
273 list_for_each_entry(block_cb, &block->cb_list, list) {
274 if (block_cb->cb == cb &&
275 block_cb->cb_ident == cb_ident)
281 EXPORT_SYMBOL(flow_block_cb_lookup);
283 void *flow_block_cb_priv(struct flow_block_cb *block_cb)
285 return block_cb->cb_priv;
287 EXPORT_SYMBOL(flow_block_cb_priv);
289 void flow_block_cb_incref(struct flow_block_cb *block_cb)
293 EXPORT_SYMBOL(flow_block_cb_incref);
295 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb)
297 return --block_cb->refcnt;
299 EXPORT_SYMBOL(flow_block_cb_decref);
301 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
302 struct list_head *driver_block_list)
304 struct flow_block_cb *block_cb;
306 list_for_each_entry(block_cb, driver_block_list, driver_list) {
307 if (block_cb->cb == cb &&
308 block_cb->cb_ident == cb_ident)
314 EXPORT_SYMBOL(flow_block_cb_is_busy);
316 int flow_block_cb_setup_simple(struct flow_block_offload *f,
317 struct list_head *driver_block_list,
319 void *cb_ident, void *cb_priv,
322 struct flow_block_cb *block_cb;
325 f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
328 f->driver_block_list = driver_block_list;
330 switch (f->command) {
331 case FLOW_BLOCK_BIND:
332 if (flow_block_cb_is_busy(cb, cb_ident, driver_block_list))
335 block_cb = flow_block_cb_alloc(cb, cb_ident, cb_priv, NULL);
336 if (IS_ERR(block_cb))
337 return PTR_ERR(block_cb);
339 flow_block_cb_add(block_cb, f);
340 list_add_tail(&block_cb->driver_list, driver_block_list);
342 case FLOW_BLOCK_UNBIND:
343 block_cb = flow_block_cb_lookup(f->block, cb, cb_ident);
347 flow_block_cb_remove(block_cb, f);
348 list_del(&block_cb->driver_list);
354 EXPORT_SYMBOL(flow_block_cb_setup_simple);
356 static DEFINE_MUTEX(flow_indr_block_lock);
357 static LIST_HEAD(flow_block_indr_list);
358 static LIST_HEAD(flow_block_indr_dev_list);
359 static LIST_HEAD(flow_indir_dev_list);
361 struct flow_indr_dev {
362 struct list_head list;
363 flow_indr_block_bind_cb_t *cb;
368 static struct flow_indr_dev *flow_indr_dev_alloc(flow_indr_block_bind_cb_t *cb,
371 struct flow_indr_dev *indr_dev;
373 indr_dev = kmalloc(sizeof(*indr_dev), GFP_KERNEL);
378 indr_dev->cb_priv = cb_priv;
379 refcount_set(&indr_dev->refcnt, 1);
384 struct flow_indir_dev_info {
386 struct net_device *dev;
388 enum tc_setup_type type;
389 void (*cleanup)(struct flow_block_cb *block_cb);
390 struct list_head list;
391 enum flow_block_command command;
392 enum flow_block_binder_type binder_type;
393 struct list_head *cb_list;
396 static void existing_qdiscs_register(flow_indr_block_bind_cb_t *cb, void *cb_priv)
398 struct flow_block_offload bo;
399 struct flow_indir_dev_info *cur;
401 list_for_each_entry(cur, &flow_indir_dev_list, list) {
402 memset(&bo, 0, sizeof(bo));
403 bo.command = cur->command;
404 bo.binder_type = cur->binder_type;
405 INIT_LIST_HEAD(&bo.cb_list);
406 cb(cur->dev, cur->sch, cb_priv, cur->type, &bo, cur->data, cur->cleanup);
407 list_splice(&bo.cb_list, cur->cb_list);
411 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv)
413 struct flow_indr_dev *indr_dev;
415 mutex_lock(&flow_indr_block_lock);
416 list_for_each_entry(indr_dev, &flow_block_indr_dev_list, list) {
417 if (indr_dev->cb == cb &&
418 indr_dev->cb_priv == cb_priv) {
419 refcount_inc(&indr_dev->refcnt);
420 mutex_unlock(&flow_indr_block_lock);
425 indr_dev = flow_indr_dev_alloc(cb, cb_priv);
427 mutex_unlock(&flow_indr_block_lock);
431 list_add(&indr_dev->list, &flow_block_indr_dev_list);
432 existing_qdiscs_register(cb, cb_priv);
433 mutex_unlock(&flow_indr_block_lock);
435 tcf_action_reoffload_cb(cb, cb_priv, true);
439 EXPORT_SYMBOL(flow_indr_dev_register);
441 static void __flow_block_indr_cleanup(void (*release)(void *cb_priv),
443 struct list_head *cleanup_list)
445 struct flow_block_cb *this, *next;
447 list_for_each_entry_safe(this, next, &flow_block_indr_list, indr.list) {
448 if (this->release == release &&
449 this->indr.cb_priv == cb_priv)
450 list_move(&this->indr.list, cleanup_list);
454 static void flow_block_indr_notify(struct list_head *cleanup_list)
456 struct flow_block_cb *this, *next;
458 list_for_each_entry_safe(this, next, cleanup_list, indr.list) {
459 list_del(&this->indr.list);
460 this->indr.cleanup(this);
464 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
465 void (*release)(void *cb_priv))
467 struct flow_indr_dev *this, *next, *indr_dev = NULL;
468 LIST_HEAD(cleanup_list);
470 mutex_lock(&flow_indr_block_lock);
471 list_for_each_entry_safe(this, next, &flow_block_indr_dev_list, list) {
472 if (this->cb == cb &&
473 this->cb_priv == cb_priv &&
474 refcount_dec_and_test(&this->refcnt)) {
476 list_del(&indr_dev->list);
482 mutex_unlock(&flow_indr_block_lock);
486 __flow_block_indr_cleanup(release, cb_priv, &cleanup_list);
487 mutex_unlock(&flow_indr_block_lock);
489 tcf_action_reoffload_cb(cb, cb_priv, false);
490 flow_block_indr_notify(&cleanup_list);
493 EXPORT_SYMBOL(flow_indr_dev_unregister);
495 static void flow_block_indr_init(struct flow_block_cb *flow_block,
496 struct flow_block_offload *bo,
497 struct net_device *dev, struct Qdisc *sch, void *data,
499 void (*cleanup)(struct flow_block_cb *block_cb))
501 flow_block->indr.binder_type = bo->binder_type;
502 flow_block->indr.data = data;
503 flow_block->indr.cb_priv = cb_priv;
504 flow_block->indr.dev = dev;
505 flow_block->indr.sch = sch;
506 flow_block->indr.cleanup = cleanup;
509 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
510 void *cb_ident, void *cb_priv,
511 void (*release)(void *cb_priv),
512 struct flow_block_offload *bo,
513 struct net_device *dev,
514 struct Qdisc *sch, void *data,
516 void (*cleanup)(struct flow_block_cb *block_cb))
518 struct flow_block_cb *block_cb;
520 block_cb = flow_block_cb_alloc(cb, cb_ident, cb_priv, release);
521 if (IS_ERR(block_cb))
524 flow_block_indr_init(block_cb, bo, dev, sch, data, indr_cb_priv, cleanup);
525 list_add(&block_cb->indr.list, &flow_block_indr_list);
530 EXPORT_SYMBOL(flow_indr_block_cb_alloc);
532 static struct flow_indir_dev_info *find_indir_dev(void *data)
534 struct flow_indir_dev_info *cur;
536 list_for_each_entry(cur, &flow_indir_dev_list, list) {
537 if (cur->data == data)
543 static int indir_dev_add(void *data, struct net_device *dev, struct Qdisc *sch,
544 enum tc_setup_type type, void (*cleanup)(struct flow_block_cb *block_cb),
545 struct flow_block_offload *bo)
547 struct flow_indir_dev_info *info;
549 info = find_indir_dev(data);
553 info = kzalloc(sizeof(*info), GFP_KERNEL);
561 info->cleanup = cleanup;
562 info->command = bo->command;
563 info->binder_type = bo->binder_type;
564 info->cb_list = bo->cb_list_head;
566 list_add(&info->list, &flow_indir_dev_list);
570 static int indir_dev_remove(void *data)
572 struct flow_indir_dev_info *info;
574 info = find_indir_dev(data);
578 list_del(&info->list);
584 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
585 enum tc_setup_type type, void *data,
586 struct flow_block_offload *bo,
587 void (*cleanup)(struct flow_block_cb *block_cb))
589 struct flow_indr_dev *this;
593 mutex_lock(&flow_indr_block_lock);
595 if (bo->command == FLOW_BLOCK_BIND)
596 indir_dev_add(data, dev, sch, type, cleanup, bo);
597 else if (bo->command == FLOW_BLOCK_UNBIND)
598 indir_dev_remove(data);
601 list_for_each_entry(this, &flow_block_indr_dev_list, list) {
602 err = this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
607 mutex_unlock(&flow_indr_block_lock);
609 return (bo && list_empty(&bo->cb_list)) ? -EOPNOTSUPP : count;
611 EXPORT_SYMBOL(flow_indr_dev_setup_offload);
613 bool flow_indr_dev_exists(void)
615 return !list_empty(&flow_block_indr_dev_list);
617 EXPORT_SYMBOL(flow_indr_dev_exists);