2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 - 2021 Intel Corporation
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 * DOC: Wireless regulatory infrastructure
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/export.h>
52 #include <linux/slab.h>
53 #include <linux/list.h>
54 #include <linux/ctype.h>
55 #include <linux/nl80211.h>
56 #include <linux/platform_device.h>
57 #include <linux/verification.h>
58 #include <linux/moduleparam.h>
59 #include <linux/firmware.h>
60 #include <net/cfg80211.h>
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
70 #define REG_ENFORCE_GRACE_MS 60000
73 * enum reg_request_treatment - regulatory request treatment
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
82 enum reg_request_treatment
{
89 static struct regulatory_request core_request_world
= {
90 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
95 .country_ie_env
= ENVIRON_ANY
,
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
102 static struct regulatory_request __rcu
*last_request
=
103 (void __force __rcu
*)&core_request_world
;
105 /* To trigger userspace events and load firmware */
106 static struct platform_device
*reg_pdev
;
109 * Central wireless core regulatory domains, we only need two,
110 * the current one and a world regulatory domain in case we have no
111 * information to give us an alpha2.
112 * (protected by RTNL, can be read under RCU)
114 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
119 * (protected by RTNL)
121 static int reg_num_devs_support_basehint
;
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
128 static bool reg_is_indoor
;
129 static DEFINE_SPINLOCK(reg_indoor_lock
);
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid
;
134 static void restore_regulatory_settings(bool reset_user
, bool cached
);
135 static void print_regdomain(const struct ieee80211_regdomain
*rd
);
137 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
139 return rcu_dereference_rtnl(cfg80211_regdomain
);
143 * Returns the regulatory domain associated with the wiphy.
145 * Requires any of RTNL, wiphy mutex or RCU protection.
147 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
149 return rcu_dereference_check(wiphy
->regd
,
150 lockdep_is_held(&wiphy
->mtx
) ||
151 lockdep_rtnl_is_held());
153 EXPORT_SYMBOL(get_wiphy_regdom
);
155 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
157 switch (dfs_region
) {
158 case NL80211_DFS_UNSET
:
160 case NL80211_DFS_FCC
:
162 case NL80211_DFS_ETSI
:
170 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
172 const struct ieee80211_regdomain
*regd
= NULL
;
173 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
174 enum nl80211_dfs_regions dfs_region
;
177 regd
= get_cfg80211_regdom();
178 dfs_region
= regd
->dfs_region
;
183 wiphy_regd
= get_wiphy_regdom(wiphy
);
187 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
188 dfs_region
= wiphy_regd
->dfs_region
;
192 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
195 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
196 dev_name(&wiphy
->dev
),
197 reg_dfs_region_str(wiphy_regd
->dfs_region
),
198 reg_dfs_region_str(regd
->dfs_region
));
206 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
210 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
213 static struct regulatory_request
*get_last_request(void)
215 return rcu_dereference_rtnl(last_request
);
218 /* Used to queue up regulatory hints */
219 static LIST_HEAD(reg_requests_list
);
220 static DEFINE_SPINLOCK(reg_requests_lock
);
222 /* Used to queue up beacon hints for review */
223 static LIST_HEAD(reg_pending_beacons
);
224 static DEFINE_SPINLOCK(reg_pending_beacons_lock
);
226 /* Used to keep track of processed beacon hints */
227 static LIST_HEAD(reg_beacon_list
);
230 struct list_head list
;
231 struct ieee80211_channel chan
;
234 static void reg_check_chans_work(struct work_struct
*work
);
235 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
237 static void reg_todo(struct work_struct
*work
);
238 static DECLARE_WORK(reg_work
, reg_todo
);
240 /* We keep a static world regulatory domain in case of the absence of CRDA */
241 static const struct ieee80211_regdomain world_regdom
= {
245 /* IEEE 802.11b/g, channels 1..11 */
246 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
247 /* IEEE 802.11b/g, channels 12..13. */
248 REG_RULE(2467-10, 2472+10, 20, 6, 20,
249 NL80211_RRF_NO_IR
| NL80211_RRF_AUTO_BW
),
250 /* IEEE 802.11 channel 14 - Only JP enables
251 * this and for 802.11b only */
252 REG_RULE(2484-10, 2484+10, 20, 6, 20,
254 NL80211_RRF_NO_OFDM
),
255 /* IEEE 802.11a, channel 36..48 */
256 REG_RULE(5180-10, 5240+10, 80, 6, 20,
258 NL80211_RRF_AUTO_BW
),
260 /* IEEE 802.11a, channel 52..64 - DFS required */
261 REG_RULE(5260-10, 5320+10, 80, 6, 20,
263 NL80211_RRF_AUTO_BW
|
266 /* IEEE 802.11a, channel 100..144 - DFS required */
267 REG_RULE(5500-10, 5720+10, 160, 6, 20,
271 /* IEEE 802.11a, channel 149..165 */
272 REG_RULE(5745-10, 5825+10, 80, 6, 20,
275 /* IEEE 802.11ad (60GHz), channels 1..3 */
276 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
280 /* protected by RTNL */
281 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
284 static char *ieee80211_regdom
= "00";
285 static char user_alpha2
[2];
286 static const struct ieee80211_regdomain
*cfg80211_user_regdom
;
288 module_param(ieee80211_regdom
, charp
, 0444);
289 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
291 static void reg_free_request(struct regulatory_request
*request
)
293 if (request
== &core_request_world
)
296 if (request
!= get_last_request())
300 static void reg_free_last_request(void)
302 struct regulatory_request
*lr
= get_last_request();
304 if (lr
!= &core_request_world
&& lr
)
305 kfree_rcu(lr
, rcu_head
);
308 static void reg_update_last_request(struct regulatory_request
*request
)
310 struct regulatory_request
*lr
;
312 lr
= get_last_request();
316 reg_free_last_request();
317 rcu_assign_pointer(last_request
, request
);
320 static void reset_regdomains(bool full_reset
,
321 const struct ieee80211_regdomain
*new_regdom
)
323 const struct ieee80211_regdomain
*r
;
327 r
= get_cfg80211_regdom();
329 /* avoid freeing static information or freeing something twice */
330 if (r
== cfg80211_world_regdom
)
332 if (cfg80211_world_regdom
== &world_regdom
)
333 cfg80211_world_regdom
= NULL
;
334 if (r
== &world_regdom
)
338 rcu_free_regdom(cfg80211_world_regdom
);
340 cfg80211_world_regdom
= &world_regdom
;
341 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
346 reg_update_last_request(&core_request_world
);
350 * Dynamic world regulatory domain requested by the wireless
351 * core upon initialization
353 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
355 struct regulatory_request
*lr
;
357 lr
= get_last_request();
361 reset_regdomains(false, rd
);
363 cfg80211_world_regdom
= rd
;
366 bool is_world_regdom(const char *alpha2
)
370 return alpha2
[0] == '0' && alpha2
[1] == '0';
373 static bool is_alpha2_set(const char *alpha2
)
377 return alpha2
[0] && alpha2
[1];
380 static bool is_unknown_alpha2(const char *alpha2
)
385 * Special case where regulatory domain was built by driver
386 * but a specific alpha2 cannot be determined
388 return alpha2
[0] == '9' && alpha2
[1] == '9';
391 static bool is_intersected_alpha2(const char *alpha2
)
396 * Special case where regulatory domain is the
397 * result of an intersection between two regulatory domain
400 return alpha2
[0] == '9' && alpha2
[1] == '8';
403 static bool is_an_alpha2(const char *alpha2
)
407 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
410 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
412 if (!alpha2_x
|| !alpha2_y
)
414 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
417 static bool regdom_changes(const char *alpha2
)
419 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
423 return !alpha2_equal(r
->alpha2
, alpha2
);
427 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
428 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
429 * has ever been issued.
431 static bool is_user_regdom_saved(void)
433 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
436 /* This would indicate a mistake on the design */
437 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
438 "Unexpected user alpha2: %c%c\n",
439 user_alpha2
[0], user_alpha2
[1]))
445 static const struct ieee80211_regdomain
*
446 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
448 struct ieee80211_regdomain
*regd
;
451 regd
= kzalloc(struct_size(regd
, reg_rules
, src_regd
->n_reg_rules
),
454 return ERR_PTR(-ENOMEM
);
456 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
458 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
459 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
460 sizeof(struct ieee80211_reg_rule
));
465 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain
*rd
)
469 if (!IS_ERR(cfg80211_user_regdom
))
470 kfree(cfg80211_user_regdom
);
471 cfg80211_user_regdom
= reg_copy_regd(rd
);
474 struct reg_regdb_apply_request
{
475 struct list_head list
;
476 const struct ieee80211_regdomain
*regdom
;
479 static LIST_HEAD(reg_regdb_apply_list
);
480 static DEFINE_MUTEX(reg_regdb_apply_mutex
);
482 static void reg_regdb_apply(struct work_struct
*work
)
484 struct reg_regdb_apply_request
*request
;
488 mutex_lock(®_regdb_apply_mutex
);
489 while (!list_empty(®_regdb_apply_list
)) {
490 request
= list_first_entry(®_regdb_apply_list
,
491 struct reg_regdb_apply_request
,
493 list_del(&request
->list
);
495 set_regdom(request
->regdom
, REGD_SOURCE_INTERNAL_DB
);
498 mutex_unlock(®_regdb_apply_mutex
);
503 static DECLARE_WORK(reg_regdb_work
, reg_regdb_apply
);
505 static int reg_schedule_apply(const struct ieee80211_regdomain
*regdom
)
507 struct reg_regdb_apply_request
*request
;
509 request
= kzalloc(sizeof(struct reg_regdb_apply_request
), GFP_KERNEL
);
515 request
->regdom
= regdom
;
517 mutex_lock(®_regdb_apply_mutex
);
518 list_add_tail(&request
->list
, ®_regdb_apply_list
);
519 mutex_unlock(®_regdb_apply_mutex
);
521 schedule_work(®_regdb_work
);
525 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
526 /* Max number of consecutive attempts to communicate with CRDA */
527 #define REG_MAX_CRDA_TIMEOUTS 10
529 static u32 reg_crda_timeouts
;
531 static void crda_timeout_work(struct work_struct
*work
);
532 static DECLARE_DELAYED_WORK(crda_timeout
, crda_timeout_work
);
534 static void crda_timeout_work(struct work_struct
*work
)
536 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
539 restore_regulatory_settings(true, false);
543 static void cancel_crda_timeout(void)
545 cancel_delayed_work(&crda_timeout
);
548 static void cancel_crda_timeout_sync(void)
550 cancel_delayed_work_sync(&crda_timeout
);
553 static void reset_crda_timeouts(void)
555 reg_crda_timeouts
= 0;
559 * This lets us keep regulatory code which is updated on a regulatory
560 * basis in userspace.
562 static int call_crda(const char *alpha2
)
565 char *env
[] = { country
, NULL
};
568 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
569 alpha2
[0], alpha2
[1]);
571 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
572 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
576 if (!is_world_regdom((char *) alpha2
))
577 pr_debug("Calling CRDA for country: %c%c\n",
578 alpha2
[0], alpha2
[1]);
580 pr_debug("Calling CRDA to update world regulatory domain\n");
582 ret
= kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
586 queue_delayed_work(system_power_efficient_wq
,
587 &crda_timeout
, msecs_to_jiffies(3142));
591 static inline void cancel_crda_timeout(void) {}
592 static inline void cancel_crda_timeout_sync(void) {}
593 static inline void reset_crda_timeouts(void) {}
594 static inline int call_crda(const char *alpha2
)
598 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
600 /* code to directly load a firmware database through request_firmware */
601 static const struct fwdb_header
*regdb
;
603 struct fwdb_country
{
606 /* this struct cannot be extended */
607 } __packed
__aligned(4);
609 struct fwdb_collection
{
613 /* no optional data yet */
614 /* aligned to 2, then followed by __be16 array of rule pointers */
615 } __packed
__aligned(4);
618 FWDB_FLAG_NO_OFDM
= BIT(0),
619 FWDB_FLAG_NO_OUTDOOR
= BIT(1),
620 FWDB_FLAG_DFS
= BIT(2),
621 FWDB_FLAG_NO_IR
= BIT(3),
622 FWDB_FLAG_AUTO_BW
= BIT(4),
631 struct fwdb_wmm_rule
{
632 struct fwdb_wmm_ac client
[IEEE80211_NUM_ACS
];
633 struct fwdb_wmm_ac ap
[IEEE80211_NUM_ACS
];
640 __be32 start
, end
, max_bw
;
641 /* start of optional data */
644 } __packed
__aligned(4);
646 #define FWDB_MAGIC 0x52474442
647 #define FWDB_VERSION 20
652 struct fwdb_country country
[];
653 } __packed
__aligned(4);
655 static int ecw2cw(int ecw
)
657 return (1 << ecw
) - 1;
660 static bool valid_wmm(struct fwdb_wmm_rule
*rule
)
662 struct fwdb_wmm_ac
*ac
= (struct fwdb_wmm_ac
*)rule
;
665 for (i
= 0; i
< IEEE80211_NUM_ACS
* 2; i
++) {
666 u16 cw_min
= ecw2cw((ac
[i
].ecw
& 0xf0) >> 4);
667 u16 cw_max
= ecw2cw(ac
[i
].ecw
& 0x0f);
668 u8 aifsn
= ac
[i
].aifsn
;
670 if (cw_min
>= cw_max
)
680 static bool valid_rule(const u8
*data
, unsigned int size
, u16 rule_ptr
)
682 struct fwdb_rule
*rule
= (void *)(data
+ (rule_ptr
<< 2));
684 if ((u8
*)rule
+ sizeof(rule
->len
) > data
+ size
)
687 /* mandatory fields */
688 if (rule
->len
< offsetofend(struct fwdb_rule
, max_bw
))
690 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
)) {
691 u32 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
692 struct fwdb_wmm_rule
*wmm
;
694 if (wmm_ptr
+ sizeof(struct fwdb_wmm_rule
) > size
)
697 wmm
= (void *)(data
+ wmm_ptr
);
705 static bool valid_country(const u8
*data
, unsigned int size
,
706 const struct fwdb_country
*country
)
708 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
709 struct fwdb_collection
*coll
= (void *)(data
+ ptr
);
713 /* make sure we can read len/n_rules */
714 if ((u8
*)coll
+ offsetofend(typeof(*coll
), n_rules
) > data
+ size
)
717 /* make sure base struct and all rules fit */
718 if ((u8
*)coll
+ ALIGN(coll
->len
, 2) +
719 (coll
->n_rules
* 2) > data
+ size
)
722 /* mandatory fields must exist */
723 if (coll
->len
< offsetofend(struct fwdb_collection
, dfs_region
))
726 rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
728 for (i
= 0; i
< coll
->n_rules
; i
++) {
729 u16 rule_ptr
= be16_to_cpu(rules_ptr
[i
]);
731 if (!valid_rule(data
, size
, rule_ptr
))
738 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
739 static struct key
*builtin_regdb_keys
;
741 static void __init
load_keys_from_buffer(const u8
*p
, unsigned int buflen
)
743 const u8
*end
= p
+ buflen
;
748 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
749 * than 256 bytes in size.
756 plen
= (p
[2] << 8) | p
[3];
761 key
= key_create_or_update(make_key_ref(builtin_regdb_keys
, 1),
762 "asymmetric", NULL
, p
, plen
,
763 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
764 KEY_USR_VIEW
| KEY_USR_READ
),
765 KEY_ALLOC_NOT_IN_QUOTA
|
767 KEY_ALLOC_BYPASS_RESTRICTION
);
769 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
772 pr_notice("Loaded X.509 cert '%s'\n",
773 key_ref_to_ptr(key
)->description
);
782 pr_err("Problem parsing in-kernel X.509 certificate list\n");
785 static int __init
load_builtin_regdb_keys(void)
788 keyring_alloc(".builtin_regdb_keys",
789 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
790 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
791 KEY_USR_VIEW
| KEY_USR_READ
| KEY_USR_SEARCH
),
792 KEY_ALLOC_NOT_IN_QUOTA
, NULL
, NULL
);
793 if (IS_ERR(builtin_regdb_keys
))
794 return PTR_ERR(builtin_regdb_keys
);
796 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
798 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
799 load_keys_from_buffer(shipped_regdb_certs
, shipped_regdb_certs_len
);
801 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
802 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
[0] != '\0')
803 load_keys_from_buffer(extra_regdb_certs
, extra_regdb_certs_len
);
809 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
811 const struct firmware
*sig
;
814 if (request_firmware(&sig
, "regulatory.db.p7s", ®_pdev
->dev
))
817 result
= verify_pkcs7_signature(data
, size
, sig
->data
, sig
->size
,
819 VERIFYING_UNSPECIFIED_SIGNATURE
,
822 release_firmware(sig
);
827 static void free_regdb_keyring(void)
829 key_put(builtin_regdb_keys
);
832 static int load_builtin_regdb_keys(void)
837 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
842 static void free_regdb_keyring(void)
845 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
847 static bool valid_regdb(const u8
*data
, unsigned int size
)
849 const struct fwdb_header
*hdr
= (void *)data
;
850 const struct fwdb_country
*country
;
852 if (size
< sizeof(*hdr
))
855 if (hdr
->magic
!= cpu_to_be32(FWDB_MAGIC
))
858 if (hdr
->version
!= cpu_to_be32(FWDB_VERSION
))
861 if (!regdb_has_valid_signature(data
, size
))
864 country
= &hdr
->country
[0];
865 while ((u8
*)(country
+ 1) <= data
+ size
) {
866 if (!country
->coll_ptr
)
868 if (!valid_country(data
, size
, country
))
876 static void set_wmm_rule(const struct fwdb_header
*db
,
877 const struct fwdb_country
*country
,
878 const struct fwdb_rule
*rule
,
879 struct ieee80211_reg_rule
*rrule
)
881 struct ieee80211_wmm_rule
*wmm_rule
= &rrule
->wmm_rule
;
882 struct fwdb_wmm_rule
*wmm
;
883 unsigned int i
, wmm_ptr
;
885 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
886 wmm
= (void *)((u8
*)db
+ wmm_ptr
);
888 if (!valid_wmm(wmm
)) {
889 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
890 be32_to_cpu(rule
->start
), be32_to_cpu(rule
->end
),
891 country
->alpha2
[0], country
->alpha2
[1]);
895 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
896 wmm_rule
->client
[i
].cw_min
=
897 ecw2cw((wmm
->client
[i
].ecw
& 0xf0) >> 4);
898 wmm_rule
->client
[i
].cw_max
= ecw2cw(wmm
->client
[i
].ecw
& 0x0f);
899 wmm_rule
->client
[i
].aifsn
= wmm
->client
[i
].aifsn
;
900 wmm_rule
->client
[i
].cot
=
901 1000 * be16_to_cpu(wmm
->client
[i
].cot
);
902 wmm_rule
->ap
[i
].cw_min
= ecw2cw((wmm
->ap
[i
].ecw
& 0xf0) >> 4);
903 wmm_rule
->ap
[i
].cw_max
= ecw2cw(wmm
->ap
[i
].ecw
& 0x0f);
904 wmm_rule
->ap
[i
].aifsn
= wmm
->ap
[i
].aifsn
;
905 wmm_rule
->ap
[i
].cot
= 1000 * be16_to_cpu(wmm
->ap
[i
].cot
);
908 rrule
->has_wmm
= true;
911 static int __regdb_query_wmm(const struct fwdb_header
*db
,
912 const struct fwdb_country
*country
, int freq
,
913 struct ieee80211_reg_rule
*rrule
)
915 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
916 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
919 for (i
= 0; i
< coll
->n_rules
; i
++) {
920 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
921 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
922 struct fwdb_rule
*rule
= (void *)((u8
*)db
+ rule_ptr
);
924 if (rule
->len
< offsetofend(struct fwdb_rule
, wmm_ptr
))
927 if (freq
>= KHZ_TO_MHZ(be32_to_cpu(rule
->start
)) &&
928 freq
<= KHZ_TO_MHZ(be32_to_cpu(rule
->end
))) {
929 set_wmm_rule(db
, country
, rule
, rrule
);
937 int reg_query_regdb_wmm(char *alpha2
, int freq
, struct ieee80211_reg_rule
*rule
)
939 const struct fwdb_header
*hdr
= regdb
;
940 const struct fwdb_country
*country
;
946 return PTR_ERR(regdb
);
948 country
= &hdr
->country
[0];
949 while (country
->coll_ptr
) {
950 if (alpha2_equal(alpha2
, country
->alpha2
))
951 return __regdb_query_wmm(regdb
, country
, freq
, rule
);
958 EXPORT_SYMBOL(reg_query_regdb_wmm
);
960 static int regdb_query_country(const struct fwdb_header
*db
,
961 const struct fwdb_country
*country
)
963 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
964 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
965 struct ieee80211_regdomain
*regdom
;
968 regdom
= kzalloc(struct_size(regdom
, reg_rules
, coll
->n_rules
),
973 regdom
->n_reg_rules
= coll
->n_rules
;
974 regdom
->alpha2
[0] = country
->alpha2
[0];
975 regdom
->alpha2
[1] = country
->alpha2
[1];
976 regdom
->dfs_region
= coll
->dfs_region
;
978 for (i
= 0; i
< regdom
->n_reg_rules
; i
++) {
979 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
980 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
981 struct fwdb_rule
*rule
= (void *)((u8
*)db
+ rule_ptr
);
982 struct ieee80211_reg_rule
*rrule
= ®dom
->reg_rules
[i
];
984 rrule
->freq_range
.start_freq_khz
= be32_to_cpu(rule
->start
);
985 rrule
->freq_range
.end_freq_khz
= be32_to_cpu(rule
->end
);
986 rrule
->freq_range
.max_bandwidth_khz
= be32_to_cpu(rule
->max_bw
);
988 rrule
->power_rule
.max_antenna_gain
= 0;
989 rrule
->power_rule
.max_eirp
= be16_to_cpu(rule
->max_eirp
);
992 if (rule
->flags
& FWDB_FLAG_NO_OFDM
)
993 rrule
->flags
|= NL80211_RRF_NO_OFDM
;
994 if (rule
->flags
& FWDB_FLAG_NO_OUTDOOR
)
995 rrule
->flags
|= NL80211_RRF_NO_OUTDOOR
;
996 if (rule
->flags
& FWDB_FLAG_DFS
)
997 rrule
->flags
|= NL80211_RRF_DFS
;
998 if (rule
->flags
& FWDB_FLAG_NO_IR
)
999 rrule
->flags
|= NL80211_RRF_NO_IR
;
1000 if (rule
->flags
& FWDB_FLAG_AUTO_BW
)
1001 rrule
->flags
|= NL80211_RRF_AUTO_BW
;
1003 rrule
->dfs_cac_ms
= 0;
1005 /* handle optional data */
1006 if (rule
->len
>= offsetofend(struct fwdb_rule
, cac_timeout
))
1008 1000 * be16_to_cpu(rule
->cac_timeout
);
1009 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
))
1010 set_wmm_rule(db
, country
, rule
, rrule
);
1013 return reg_schedule_apply(regdom
);
1016 static int query_regdb(const char *alpha2
)
1018 const struct fwdb_header
*hdr
= regdb
;
1019 const struct fwdb_country
*country
;
1024 return PTR_ERR(regdb
);
1026 country
= &hdr
->country
[0];
1027 while (country
->coll_ptr
) {
1028 if (alpha2_equal(alpha2
, country
->alpha2
))
1029 return regdb_query_country(regdb
, country
);
1036 static void regdb_fw_cb(const struct firmware
*fw
, void *context
)
1039 bool restore
= true;
1043 pr_info("failed to load regulatory.db\n");
1044 set_error
= -ENODATA
;
1045 } else if (!valid_regdb(fw
->data
, fw
->size
)) {
1046 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1047 set_error
= -EINVAL
;
1051 if (regdb
&& !IS_ERR(regdb
)) {
1052 /* negative case - a bug
1053 * positive case - can happen due to race in case of multiple cb's in
1054 * queue, due to usage of asynchronous callback
1056 * Either case, just restore and free new db.
1058 } else if (set_error
) {
1059 regdb
= ERR_PTR(set_error
);
1061 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1064 restore
= context
&& query_regdb(context
);
1071 restore_regulatory_settings(true, false);
1077 release_firmware(fw
);
1080 static int query_regdb_file(const char *alpha2
)
1085 return query_regdb(alpha2
);
1087 alpha2
= kmemdup(alpha2
, 2, GFP_KERNEL
);
1091 return request_firmware_nowait(THIS_MODULE
, true, "regulatory.db",
1092 ®_pdev
->dev
, GFP_KERNEL
,
1093 (void *)alpha2
, regdb_fw_cb
);
1096 int reg_reload_regdb(void)
1098 const struct firmware
*fw
;
1102 err
= request_firmware(&fw
, "regulatory.db", ®_pdev
->dev
);
1106 if (!valid_regdb(fw
->data
, fw
->size
)) {
1111 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1118 if (!IS_ERR_OR_NULL(regdb
))
1124 release_firmware(fw
);
1128 static bool reg_query_database(struct regulatory_request
*request
)
1130 if (query_regdb_file(request
->alpha2
) == 0)
1133 if (call_crda(request
->alpha2
) == 0)
1139 bool reg_is_valid_request(const char *alpha2
)
1141 struct regulatory_request
*lr
= get_last_request();
1143 if (!lr
|| lr
->processed
)
1146 return alpha2_equal(lr
->alpha2
, alpha2
);
1149 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
1151 struct regulatory_request
*lr
= get_last_request();
1154 * Follow the driver's regulatory domain, if present, unless a country
1155 * IE has been processed or a user wants to help complaince further
1157 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1158 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
1160 return get_wiphy_regdom(wiphy
);
1162 return get_cfg80211_regdom();
1166 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
1167 const struct ieee80211_reg_rule
*rule
)
1169 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1170 const struct ieee80211_freq_range
*freq_range_tmp
;
1171 const struct ieee80211_reg_rule
*tmp
;
1172 u32 start_freq
, end_freq
, idx
, no
;
1174 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
1175 if (rule
== &rd
->reg_rules
[idx
])
1178 if (idx
== rd
->n_reg_rules
)
1181 /* get start_freq */
1185 tmp
= &rd
->reg_rules
[--no
];
1186 freq_range_tmp
= &tmp
->freq_range
;
1188 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
1191 freq_range
= freq_range_tmp
;
1194 start_freq
= freq_range
->start_freq_khz
;
1197 freq_range
= &rule
->freq_range
;
1200 while (no
< rd
->n_reg_rules
- 1) {
1201 tmp
= &rd
->reg_rules
[++no
];
1202 freq_range_tmp
= &tmp
->freq_range
;
1204 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
1207 freq_range
= freq_range_tmp
;
1210 end_freq
= freq_range
->end_freq_khz
;
1212 return end_freq
- start_freq
;
1215 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
1216 const struct ieee80211_reg_rule
*rule
)
1218 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
1220 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
1221 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
1222 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
1223 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
1226 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1229 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
1230 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
1231 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
1236 /* Sanity check on a regulatory rule */
1237 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
1239 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1242 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
1245 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
1248 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1250 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
1251 freq_range
->max_bandwidth_khz
> freq_diff
)
1257 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
1259 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1262 if (!rd
->n_reg_rules
)
1265 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
1268 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1269 reg_rule
= &rd
->reg_rules
[i
];
1270 if (!is_valid_reg_rule(reg_rule
))
1278 * freq_in_rule_band - tells us if a frequency is in a frequency band
1279 * @freq_range: frequency rule we want to query
1280 * @freq_khz: frequency we are inquiring about
1282 * This lets us know if a specific frequency rule is or is not relevant to
1283 * a specific frequency's band. Bands are device specific and artificial
1284 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1285 * however it is safe for now to assume that a frequency rule should not be
1286 * part of a frequency's band if the start freq or end freq are off by more
1287 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1289 * This resolution can be lowered and should be considered as we add
1290 * regulatory rule support for other "bands".
1292 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
1295 #define ONE_GHZ_IN_KHZ 1000000
1297 * From 802.11ad: directional multi-gigabit (DMG):
1298 * Pertaining to operation in a frequency band containing a channel
1299 * with the Channel starting frequency above 45 GHz.
1301 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
1302 20 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
1303 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
1305 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
1308 #undef ONE_GHZ_IN_KHZ
1312 * Later on we can perhaps use the more restrictive DFS
1313 * region but we don't have information for that yet so
1314 * for now simply disallow conflicts.
1316 static enum nl80211_dfs_regions
1317 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
1318 const enum nl80211_dfs_regions dfs_region2
)
1320 if (dfs_region1
!= dfs_region2
)
1321 return NL80211_DFS_UNSET
;
1325 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac
*wmm_ac1
,
1326 const struct ieee80211_wmm_ac
*wmm_ac2
,
1327 struct ieee80211_wmm_ac
*intersect
)
1329 intersect
->cw_min
= max_t(u16
, wmm_ac1
->cw_min
, wmm_ac2
->cw_min
);
1330 intersect
->cw_max
= max_t(u16
, wmm_ac1
->cw_max
, wmm_ac2
->cw_max
);
1331 intersect
->cot
= min_t(u16
, wmm_ac1
->cot
, wmm_ac2
->cot
);
1332 intersect
->aifsn
= max_t(u8
, wmm_ac1
->aifsn
, wmm_ac2
->aifsn
);
1336 * Helper for regdom_intersect(), this does the real
1337 * mathematical intersection fun
1339 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
1340 const struct ieee80211_regdomain
*rd2
,
1341 const struct ieee80211_reg_rule
*rule1
,
1342 const struct ieee80211_reg_rule
*rule2
,
1343 struct ieee80211_reg_rule
*intersected_rule
)
1345 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
1346 struct ieee80211_freq_range
*freq_range
;
1347 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
1348 struct ieee80211_power_rule
*power_rule
;
1349 const struct ieee80211_wmm_rule
*wmm_rule1
, *wmm_rule2
;
1350 struct ieee80211_wmm_rule
*wmm_rule
;
1351 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
1353 freq_range1
= &rule1
->freq_range
;
1354 freq_range2
= &rule2
->freq_range
;
1355 freq_range
= &intersected_rule
->freq_range
;
1357 power_rule1
= &rule1
->power_rule
;
1358 power_rule2
= &rule2
->power_rule
;
1359 power_rule
= &intersected_rule
->power_rule
;
1361 wmm_rule1
= &rule1
->wmm_rule
;
1362 wmm_rule2
= &rule2
->wmm_rule
;
1363 wmm_rule
= &intersected_rule
->wmm_rule
;
1365 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
1366 freq_range2
->start_freq_khz
);
1367 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
1368 freq_range2
->end_freq_khz
);
1370 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
1371 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
1373 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
1374 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
1375 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
1376 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
1378 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
1380 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
1383 * In case NL80211_RRF_AUTO_BW requested for both rules
1384 * set AUTO_BW in intersected rule also. Next we will
1385 * calculate BW correctly in handle_channel function.
1386 * In other case remove AUTO_BW flag while we calculate
1387 * maximum bandwidth correctly and auto calculation is
1390 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
1391 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
1392 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
1394 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
1396 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1397 if (freq_range
->max_bandwidth_khz
> freq_diff
)
1398 freq_range
->max_bandwidth_khz
= freq_diff
;
1400 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
1401 power_rule2
->max_eirp
);
1402 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
1403 power_rule2
->max_antenna_gain
);
1405 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
1408 if (rule1
->has_wmm
&& rule2
->has_wmm
) {
1411 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1412 reg_wmm_rules_intersect(&wmm_rule1
->client
[ac
],
1413 &wmm_rule2
->client
[ac
],
1414 &wmm_rule
->client
[ac
]);
1415 reg_wmm_rules_intersect(&wmm_rule1
->ap
[ac
],
1420 intersected_rule
->has_wmm
= true;
1421 } else if (rule1
->has_wmm
) {
1422 *wmm_rule
= *wmm_rule1
;
1423 intersected_rule
->has_wmm
= true;
1424 } else if (rule2
->has_wmm
) {
1425 *wmm_rule
= *wmm_rule2
;
1426 intersected_rule
->has_wmm
= true;
1428 intersected_rule
->has_wmm
= false;
1431 if (!is_valid_reg_rule(intersected_rule
))
1437 /* check whether old rule contains new rule */
1438 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
1439 struct ieee80211_reg_rule
*r2
)
1441 /* for simplicity, currently consider only same flags */
1442 if (r1
->flags
!= r2
->flags
)
1445 /* verify r1 is more restrictive */
1446 if ((r1
->power_rule
.max_antenna_gain
>
1447 r2
->power_rule
.max_antenna_gain
) ||
1448 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
1451 /* make sure r2's range is contained within r1 */
1452 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
1453 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
1456 /* and finally verify that r1.max_bw >= r2.max_bw */
1457 if (r1
->freq_range
.max_bandwidth_khz
<
1458 r2
->freq_range
.max_bandwidth_khz
)
1464 /* add or extend current rules. do nothing if rule is already contained */
1465 static void add_rule(struct ieee80211_reg_rule
*rule
,
1466 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
1468 struct ieee80211_reg_rule
*tmp_rule
;
1471 for (i
= 0; i
< *n_rules
; i
++) {
1472 tmp_rule
= ®_rules
[i
];
1473 /* rule is already contained - do nothing */
1474 if (rule_contains(tmp_rule
, rule
))
1477 /* extend rule if possible */
1478 if (rule_contains(rule
, tmp_rule
)) {
1479 memcpy(tmp_rule
, rule
, sizeof(*rule
));
1484 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
1489 * regdom_intersect - do the intersection between two regulatory domains
1490 * @rd1: first regulatory domain
1491 * @rd2: second regulatory domain
1493 * Use this function to get the intersection between two regulatory domains.
1494 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1495 * as no one single alpha2 can represent this regulatory domain.
1497 * Returns a pointer to the regulatory domain structure which will hold the
1498 * resulting intersection of rules between rd1 and rd2. We will
1499 * kzalloc() this structure for you.
1501 static struct ieee80211_regdomain
*
1502 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
1503 const struct ieee80211_regdomain
*rd2
)
1507 unsigned int num_rules
= 0;
1508 const struct ieee80211_reg_rule
*rule1
, *rule2
;
1509 struct ieee80211_reg_rule intersected_rule
;
1510 struct ieee80211_regdomain
*rd
;
1516 * First we get a count of the rules we'll need, then we actually
1517 * build them. This is to so we can malloc() and free() a
1518 * regdomain once. The reason we use reg_rules_intersect() here
1519 * is it will return -EINVAL if the rule computed makes no sense.
1520 * All rules that do check out OK are valid.
1523 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1524 rule1
= &rd1
->reg_rules
[x
];
1525 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1526 rule2
= &rd2
->reg_rules
[y
];
1527 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1536 rd
= kzalloc(struct_size(rd
, reg_rules
, num_rules
), GFP_KERNEL
);
1540 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1541 rule1
= &rd1
->reg_rules
[x
];
1542 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1543 rule2
= &rd2
->reg_rules
[y
];
1544 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1547 * No need to memset here the intersected rule here as
1548 * we're not using the stack anymore
1553 add_rule(&intersected_rule
, rd
->reg_rules
,
1558 rd
->alpha2
[0] = '9';
1559 rd
->alpha2
[1] = '8';
1560 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
1567 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1568 * want to just have the channel structure use these
1570 static u32
map_regdom_flags(u32 rd_flags
)
1572 u32 channel_flags
= 0;
1573 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
1574 channel_flags
|= IEEE80211_CHAN_NO_IR
;
1575 if (rd_flags
& NL80211_RRF_DFS
)
1576 channel_flags
|= IEEE80211_CHAN_RADAR
;
1577 if (rd_flags
& NL80211_RRF_NO_OFDM
)
1578 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
1579 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
1580 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
1581 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
1582 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
1583 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
1584 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1585 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
1586 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1587 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
1588 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1589 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
1590 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1591 if (rd_flags
& NL80211_RRF_NO_HE
)
1592 channel_flags
|= IEEE80211_CHAN_NO_HE
;
1593 return channel_flags
;
1596 static const struct ieee80211_reg_rule
*
1597 freq_reg_info_regd(u32 center_freq
,
1598 const struct ieee80211_regdomain
*regd
, u32 bw
)
1601 bool band_rule_found
= false;
1602 bool bw_fits
= false;
1605 return ERR_PTR(-EINVAL
);
1607 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1608 const struct ieee80211_reg_rule
*rr
;
1609 const struct ieee80211_freq_range
*fr
= NULL
;
1611 rr
= ®d
->reg_rules
[i
];
1612 fr
= &rr
->freq_range
;
1615 * We only need to know if one frequency rule was
1616 * in center_freq's band, that's enough, so let's
1617 * not overwrite it once found
1619 if (!band_rule_found
)
1620 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1622 bw_fits
= cfg80211_does_bw_fit_range(fr
, center_freq
, bw
);
1624 if (band_rule_found
&& bw_fits
)
1628 if (!band_rule_found
)
1629 return ERR_PTR(-ERANGE
);
1631 return ERR_PTR(-EINVAL
);
1634 static const struct ieee80211_reg_rule
*
1635 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1637 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1638 static const u32 bws
[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1639 const struct ieee80211_reg_rule
*reg_rule
= ERR_PTR(-ERANGE
);
1640 int i
= ARRAY_SIZE(bws
) - 1;
1643 for (bw
= MHZ_TO_KHZ(bws
[i
]); bw
>= min_bw
; bw
= MHZ_TO_KHZ(bws
[i
--])) {
1644 reg_rule
= freq_reg_info_regd(center_freq
, regd
, bw
);
1645 if (!IS_ERR(reg_rule
))
1652 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1655 u32 min_bw
= center_freq
< MHZ_TO_KHZ(1000) ? 1 : 20;
1657 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(min_bw
));
1659 EXPORT_SYMBOL(freq_reg_info
);
1661 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1663 switch (initiator
) {
1664 case NL80211_REGDOM_SET_BY_CORE
:
1666 case NL80211_REGDOM_SET_BY_USER
:
1668 case NL80211_REGDOM_SET_BY_DRIVER
:
1670 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1671 return "country element";
1677 EXPORT_SYMBOL(reg_initiator_name
);
1679 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain
*regd
,
1680 const struct ieee80211_reg_rule
*reg_rule
,
1681 const struct ieee80211_channel
*chan
)
1683 const struct ieee80211_freq_range
*freq_range
= NULL
;
1684 u32 max_bandwidth_khz
, center_freq_khz
, bw_flags
= 0;
1685 bool is_s1g
= chan
->band
== NL80211_BAND_S1GHZ
;
1687 freq_range
= ®_rule
->freq_range
;
1689 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1690 center_freq_khz
= ieee80211_channel_to_khz(chan
);
1691 /* Check if auto calculation requested */
1692 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1693 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1695 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1696 if (!cfg80211_does_bw_fit_range(freq_range
,
1699 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1700 if (!cfg80211_does_bw_fit_range(freq_range
,
1703 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1706 /* S1G is strict about non overlapping channels. We can
1707 * calculate which bandwidth is allowed per channel by finding
1708 * the largest bandwidth which cleanly divides the freq_range.
1711 int ch_bw
= max_bandwidth_khz
;
1714 edge_offset
= (center_freq_khz
- ch_bw
/ 2) -
1715 freq_range
->start_freq_khz
;
1716 if (edge_offset
% ch_bw
== 0) {
1717 switch (KHZ_TO_MHZ(ch_bw
)) {
1719 bw_flags
|= IEEE80211_CHAN_1MHZ
;
1722 bw_flags
|= IEEE80211_CHAN_2MHZ
;
1725 bw_flags
|= IEEE80211_CHAN_4MHZ
;
1728 bw_flags
|= IEEE80211_CHAN_8MHZ
;
1731 bw_flags
|= IEEE80211_CHAN_16MHZ
;
1734 /* If we got here, no bandwidths fit on
1735 * this frequency, ie. band edge.
1737 bw_flags
|= IEEE80211_CHAN_DISABLED
;
1745 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1746 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1747 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1748 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1749 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1750 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1751 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1752 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1753 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1754 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1759 static void handle_channel_single_rule(struct wiphy
*wiphy
,
1760 enum nl80211_reg_initiator initiator
,
1761 struct ieee80211_channel
*chan
,
1763 struct regulatory_request
*lr
,
1764 struct wiphy
*request_wiphy
,
1765 const struct ieee80211_reg_rule
*reg_rule
)
1768 const struct ieee80211_power_rule
*power_rule
= NULL
;
1769 const struct ieee80211_regdomain
*regd
;
1771 regd
= reg_get_regdomain(wiphy
);
1773 power_rule
= ®_rule
->power_rule
;
1774 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
1776 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1777 request_wiphy
&& request_wiphy
== wiphy
&&
1778 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1780 * This guarantees the driver's requested regulatory domain
1781 * will always be used as a base for further regulatory
1784 chan
->flags
= chan
->orig_flags
=
1785 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1786 chan
->max_antenna_gain
= chan
->orig_mag
=
1787 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1788 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1789 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1791 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1792 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1793 if (reg_rule
->dfs_cac_ms
)
1794 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1800 chan
->dfs_state
= NL80211_DFS_USABLE
;
1801 chan
->dfs_state_entered
= jiffies
;
1803 chan
->beacon_found
= false;
1804 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1805 chan
->max_antenna_gain
=
1806 min_t(int, chan
->orig_mag
,
1807 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1808 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1810 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1811 if (reg_rule
->dfs_cac_ms
)
1812 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1814 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1817 if (chan
->orig_mpwr
) {
1819 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1820 * will always follow the passed country IE power settings.
1822 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1823 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1824 chan
->max_power
= chan
->max_reg_power
;
1826 chan
->max_power
= min(chan
->orig_mpwr
,
1827 chan
->max_reg_power
);
1829 chan
->max_power
= chan
->max_reg_power
;
1832 static void handle_channel_adjacent_rules(struct wiphy
*wiphy
,
1833 enum nl80211_reg_initiator initiator
,
1834 struct ieee80211_channel
*chan
,
1836 struct regulatory_request
*lr
,
1837 struct wiphy
*request_wiphy
,
1838 const struct ieee80211_reg_rule
*rrule1
,
1839 const struct ieee80211_reg_rule
*rrule2
,
1840 struct ieee80211_freq_range
*comb_range
)
1844 const struct ieee80211_power_rule
*power_rule1
= NULL
;
1845 const struct ieee80211_power_rule
*power_rule2
= NULL
;
1846 const struct ieee80211_regdomain
*regd
;
1848 regd
= reg_get_regdomain(wiphy
);
1850 power_rule1
= &rrule1
->power_rule
;
1851 power_rule2
= &rrule2
->power_rule
;
1852 bw_flags1
= reg_rule_to_chan_bw_flags(regd
, rrule1
, chan
);
1853 bw_flags2
= reg_rule_to_chan_bw_flags(regd
, rrule2
, chan
);
1855 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1856 request_wiphy
&& request_wiphy
== wiphy
&&
1857 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1858 /* This guarantees the driver's requested regulatory domain
1859 * will always be used as a base for further regulatory
1863 map_regdom_flags(rrule1
->flags
) |
1864 map_regdom_flags(rrule2
->flags
) |
1867 chan
->orig_flags
= chan
->flags
;
1868 chan
->max_antenna_gain
=
1869 min_t(int, MBI_TO_DBI(power_rule1
->max_antenna_gain
),
1870 MBI_TO_DBI(power_rule2
->max_antenna_gain
));
1871 chan
->orig_mag
= chan
->max_antenna_gain
;
1872 chan
->max_reg_power
=
1873 min_t(int, MBM_TO_DBM(power_rule1
->max_eirp
),
1874 MBM_TO_DBM(power_rule2
->max_eirp
));
1875 chan
->max_power
= chan
->max_reg_power
;
1876 chan
->orig_mpwr
= chan
->max_reg_power
;
1878 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1879 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1880 if (rrule1
->dfs_cac_ms
|| rrule2
->dfs_cac_ms
)
1881 chan
->dfs_cac_ms
= max_t(unsigned int,
1883 rrule2
->dfs_cac_ms
);
1889 chan
->dfs_state
= NL80211_DFS_USABLE
;
1890 chan
->dfs_state_entered
= jiffies
;
1892 chan
->beacon_found
= false;
1893 chan
->flags
= flags
| bw_flags1
| bw_flags2
|
1894 map_regdom_flags(rrule1
->flags
) |
1895 map_regdom_flags(rrule2
->flags
);
1897 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1898 * (otherwise no adj. rule case), recheck therefore
1900 if (cfg80211_does_bw_fit_range(comb_range
,
1901 ieee80211_channel_to_khz(chan
),
1903 chan
->flags
&= ~IEEE80211_CHAN_NO_10MHZ
;
1904 if (cfg80211_does_bw_fit_range(comb_range
,
1905 ieee80211_channel_to_khz(chan
),
1907 chan
->flags
&= ~IEEE80211_CHAN_NO_20MHZ
;
1909 chan
->max_antenna_gain
=
1910 min_t(int, chan
->orig_mag
,
1912 MBI_TO_DBI(power_rule1
->max_antenna_gain
),
1913 MBI_TO_DBI(power_rule2
->max_antenna_gain
)));
1914 chan
->max_reg_power
= min_t(int,
1915 MBM_TO_DBM(power_rule1
->max_eirp
),
1916 MBM_TO_DBM(power_rule2
->max_eirp
));
1918 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1919 if (rrule1
->dfs_cac_ms
|| rrule2
->dfs_cac_ms
)
1920 chan
->dfs_cac_ms
= max_t(unsigned int,
1922 rrule2
->dfs_cac_ms
);
1924 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1927 if (chan
->orig_mpwr
) {
1928 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1929 * will always follow the passed country IE power settings.
1931 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1932 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1933 chan
->max_power
= chan
->max_reg_power
;
1935 chan
->max_power
= min(chan
->orig_mpwr
,
1936 chan
->max_reg_power
);
1938 chan
->max_power
= chan
->max_reg_power
;
1942 /* Note that right now we assume the desired channel bandwidth
1943 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1944 * per channel, the primary and the extension channel).
1946 static void handle_channel(struct wiphy
*wiphy
,
1947 enum nl80211_reg_initiator initiator
,
1948 struct ieee80211_channel
*chan
)
1950 const u32 orig_chan_freq
= ieee80211_channel_to_khz(chan
);
1951 struct regulatory_request
*lr
= get_last_request();
1952 struct wiphy
*request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1953 const struct ieee80211_reg_rule
*rrule
= NULL
;
1954 const struct ieee80211_reg_rule
*rrule1
= NULL
;
1955 const struct ieee80211_reg_rule
*rrule2
= NULL
;
1957 u32 flags
= chan
->orig_flags
;
1959 rrule
= freq_reg_info(wiphy
, orig_chan_freq
);
1960 if (IS_ERR(rrule
)) {
1961 /* check for adjacent match, therefore get rules for
1962 * chan - 20 MHz and chan + 20 MHz and test
1963 * if reg rules are adjacent
1965 rrule1
= freq_reg_info(wiphy
,
1966 orig_chan_freq
- MHZ_TO_KHZ(20));
1967 rrule2
= freq_reg_info(wiphy
,
1968 orig_chan_freq
+ MHZ_TO_KHZ(20));
1969 if (!IS_ERR(rrule1
) && !IS_ERR(rrule2
)) {
1970 struct ieee80211_freq_range comb_range
;
1972 if (rrule1
->freq_range
.end_freq_khz
!=
1973 rrule2
->freq_range
.start_freq_khz
)
1976 comb_range
.start_freq_khz
=
1977 rrule1
->freq_range
.start_freq_khz
;
1978 comb_range
.end_freq_khz
=
1979 rrule2
->freq_range
.end_freq_khz
;
1980 comb_range
.max_bandwidth_khz
=
1982 rrule1
->freq_range
.max_bandwidth_khz
,
1983 rrule2
->freq_range
.max_bandwidth_khz
);
1985 if (!cfg80211_does_bw_fit_range(&comb_range
,
1990 handle_channel_adjacent_rules(wiphy
, initiator
, chan
,
1991 flags
, lr
, request_wiphy
,
1998 /* We will disable all channels that do not match our
1999 * received regulatory rule unless the hint is coming
2000 * from a Country IE and the Country IE had no information
2001 * about a band. The IEEE 802.11 spec allows for an AP
2002 * to send only a subset of the regulatory rules allowed,
2003 * so an AP in the US that only supports 2.4 GHz may only send
2004 * a country IE with information for the 2.4 GHz band
2005 * while 5 GHz is still supported.
2007 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2008 PTR_ERR(rrule
) == -ERANGE
)
2011 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2012 request_wiphy
&& request_wiphy
== wiphy
&&
2013 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2014 pr_debug("Disabling freq %d.%03d MHz for good\n",
2015 chan
->center_freq
, chan
->freq_offset
);
2016 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
2017 chan
->flags
= chan
->orig_flags
;
2019 pr_debug("Disabling freq %d.%03d MHz\n",
2020 chan
->center_freq
, chan
->freq_offset
);
2021 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
2026 handle_channel_single_rule(wiphy
, initiator
, chan
, flags
, lr
,
2027 request_wiphy
, rrule
);
2030 static void handle_band(struct wiphy
*wiphy
,
2031 enum nl80211_reg_initiator initiator
,
2032 struct ieee80211_supported_band
*sband
)
2039 for (i
= 0; i
< sband
->n_channels
; i
++)
2040 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
2043 static bool reg_request_cell_base(struct regulatory_request
*request
)
2045 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2047 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
2050 bool reg_last_request_cell_base(void)
2052 return reg_request_cell_base(get_last_request());
2055 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2056 /* Core specific check */
2057 static enum reg_request_treatment
2058 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
2060 struct regulatory_request
*lr
= get_last_request();
2062 if (!reg_num_devs_support_basehint
)
2063 return REG_REQ_IGNORE
;
2065 if (reg_request_cell_base(lr
) &&
2066 !regdom_changes(pending_request
->alpha2
))
2067 return REG_REQ_ALREADY_SET
;
2072 /* Device specific check */
2073 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
2075 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
2078 static enum reg_request_treatment
2079 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
2081 return REG_REQ_IGNORE
;
2084 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
2090 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
2092 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
2093 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
2098 static bool ignore_reg_update(struct wiphy
*wiphy
,
2099 enum nl80211_reg_initiator initiator
)
2101 struct regulatory_request
*lr
= get_last_request();
2103 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2107 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2108 reg_initiator_name(initiator
));
2112 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
2113 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
2114 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2115 reg_initiator_name(initiator
));
2120 * wiphy->regd will be set once the device has its own
2121 * desired regulatory domain set
2123 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
2124 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2125 !is_world_regdom(lr
->alpha2
)) {
2126 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2127 reg_initiator_name(initiator
));
2131 if (reg_request_cell_base(lr
))
2132 return reg_dev_ignore_cell_hint(wiphy
);
2137 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
2139 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
2140 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
2141 struct regulatory_request
*lr
= get_last_request();
2143 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
2146 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2147 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
2153 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
2154 struct reg_beacon
*reg_beacon
)
2156 struct ieee80211_supported_band
*sband
;
2157 struct ieee80211_channel
*chan
;
2158 bool channel_changed
= false;
2159 struct ieee80211_channel chan_before
;
2161 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2162 chan
= &sband
->channels
[chan_idx
];
2164 if (likely(!ieee80211_channel_equal(chan
, ®_beacon
->chan
)))
2167 if (chan
->beacon_found
)
2170 chan
->beacon_found
= true;
2172 if (!reg_is_world_roaming(wiphy
))
2175 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
2178 chan_before
= *chan
;
2180 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
2181 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
2182 channel_changed
= true;
2185 if (channel_changed
)
2186 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
2190 * Called when a scan on a wiphy finds a beacon on
2193 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
2194 struct reg_beacon
*reg_beacon
)
2197 struct ieee80211_supported_band
*sband
;
2199 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
2202 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2204 for (i
= 0; i
< sband
->n_channels
; i
++)
2205 handle_reg_beacon(wiphy
, i
, reg_beacon
);
2209 * Called upon reg changes or a new wiphy is added
2211 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
2214 struct ieee80211_supported_band
*sband
;
2215 struct reg_beacon
*reg_beacon
;
2217 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
2218 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
2220 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2221 for (i
= 0; i
< sband
->n_channels
; i
++)
2222 handle_reg_beacon(wiphy
, i
, reg_beacon
);
2226 /* Reap the advantages of previously found beacons */
2227 static void reg_process_beacons(struct wiphy
*wiphy
)
2230 * Means we are just firing up cfg80211, so no beacons would
2231 * have been processed yet.
2235 wiphy_update_beacon_reg(wiphy
);
2238 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
2242 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
2244 /* This would happen when regulatory rules disallow HT40 completely */
2245 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
2250 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
2251 struct ieee80211_channel
*channel
)
2253 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
2254 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
2255 const struct ieee80211_regdomain
*regd
;
2259 if (!is_ht40_allowed(channel
)) {
2260 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
2265 * We need to ensure the extension channels exist to
2266 * be able to use HT40- or HT40+, this finds them (or not)
2268 for (i
= 0; i
< sband
->n_channels
; i
++) {
2269 struct ieee80211_channel
*c
= &sband
->channels
[i
];
2271 if (c
->center_freq
== (channel
->center_freq
- 20))
2273 if (c
->center_freq
== (channel
->center_freq
+ 20))
2278 regd
= get_wiphy_regdom(wiphy
);
2280 const struct ieee80211_reg_rule
*reg_rule
=
2281 freq_reg_info_regd(MHZ_TO_KHZ(channel
->center_freq
),
2282 regd
, MHZ_TO_KHZ(20));
2284 if (!IS_ERR(reg_rule
))
2285 flags
= reg_rule
->flags
;
2289 * Please note that this assumes target bandwidth is 20 MHz,
2290 * if that ever changes we also need to change the below logic
2291 * to include that as well.
2293 if (!is_ht40_allowed(channel_before
) ||
2294 flags
& NL80211_RRF_NO_HT40MINUS
)
2295 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
2297 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
2299 if (!is_ht40_allowed(channel_after
) ||
2300 flags
& NL80211_RRF_NO_HT40PLUS
)
2301 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
2303 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
2306 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
2307 struct ieee80211_supported_band
*sband
)
2314 for (i
= 0; i
< sband
->n_channels
; i
++)
2315 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
2318 static void reg_process_ht_flags(struct wiphy
*wiphy
)
2320 enum nl80211_band band
;
2325 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2326 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
2329 static void reg_call_notifier(struct wiphy
*wiphy
,
2330 struct regulatory_request
*request
)
2332 if (wiphy
->reg_notifier
)
2333 wiphy
->reg_notifier(wiphy
, request
);
2336 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
2338 struct cfg80211_chan_def chandef
= {};
2339 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2340 enum nl80211_iftype iftype
;
2343 iftype
= wdev
->iftype
;
2345 /* make sure the interface is active */
2346 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
2347 goto wdev_inactive_unlock
;
2350 case NL80211_IFTYPE_AP
:
2351 case NL80211_IFTYPE_P2P_GO
:
2352 if (!wdev
->beacon_interval
)
2353 goto wdev_inactive_unlock
;
2354 chandef
= wdev
->chandef
;
2356 case NL80211_IFTYPE_ADHOC
:
2357 if (!wdev
->ssid_len
)
2358 goto wdev_inactive_unlock
;
2359 chandef
= wdev
->chandef
;
2361 case NL80211_IFTYPE_STATION
:
2362 case NL80211_IFTYPE_P2P_CLIENT
:
2363 if (!wdev
->current_bss
||
2364 !wdev
->current_bss
->pub
.channel
)
2365 goto wdev_inactive_unlock
;
2367 if (!rdev
->ops
->get_channel
||
2368 rdev_get_channel(rdev
, wdev
, &chandef
))
2369 cfg80211_chandef_create(&chandef
,
2370 wdev
->current_bss
->pub
.channel
,
2371 NL80211_CHAN_NO_HT
);
2373 case NL80211_IFTYPE_MONITOR
:
2374 case NL80211_IFTYPE_AP_VLAN
:
2375 case NL80211_IFTYPE_P2P_DEVICE
:
2376 /* no enforcement required */
2379 /* others not implemented for now */
2387 case NL80211_IFTYPE_AP
:
2388 case NL80211_IFTYPE_P2P_GO
:
2389 case NL80211_IFTYPE_ADHOC
:
2390 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
2391 case NL80211_IFTYPE_STATION
:
2392 case NL80211_IFTYPE_P2P_CLIENT
:
2393 return cfg80211_chandef_usable(wiphy
, &chandef
,
2394 IEEE80211_CHAN_DISABLED
);
2401 wdev_inactive_unlock
:
2406 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
2408 struct wireless_dev
*wdev
;
2409 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2413 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
)
2414 if (!reg_wdev_chan_valid(wiphy
, wdev
))
2415 cfg80211_leave(rdev
, wdev
);
2418 static void reg_check_chans_work(struct work_struct
*work
)
2420 struct cfg80211_registered_device
*rdev
;
2422 pr_debug("Verifying active interfaces after reg change\n");
2425 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2426 if (!(rdev
->wiphy
.regulatory_flags
&
2427 REGULATORY_IGNORE_STALE_KICKOFF
))
2428 reg_leave_invalid_chans(&rdev
->wiphy
);
2433 static void reg_check_channels(void)
2436 * Give usermode a chance to do something nicer (move to another
2437 * channel, orderly disconnection), before forcing a disconnection.
2439 mod_delayed_work(system_power_efficient_wq
,
2441 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
2444 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
2445 enum nl80211_reg_initiator initiator
)
2447 enum nl80211_band band
;
2448 struct regulatory_request
*lr
= get_last_request();
2450 if (ignore_reg_update(wiphy
, initiator
)) {
2452 * Regulatory updates set by CORE are ignored for custom
2453 * regulatory cards. Let us notify the changes to the driver,
2454 * as some drivers used this to restore its orig_* reg domain.
2456 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
2457 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
&&
2458 !(wiphy
->regulatory_flags
&
2459 REGULATORY_WIPHY_SELF_MANAGED
))
2460 reg_call_notifier(wiphy
, lr
);
2464 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
2466 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2467 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
2469 reg_process_beacons(wiphy
);
2470 reg_process_ht_flags(wiphy
);
2471 reg_call_notifier(wiphy
, lr
);
2474 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
2476 struct cfg80211_registered_device
*rdev
;
2477 struct wiphy
*wiphy
;
2481 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2482 wiphy
= &rdev
->wiphy
;
2483 wiphy_update_regulatory(wiphy
, initiator
);
2486 reg_check_channels();
2489 static void handle_channel_custom(struct wiphy
*wiphy
,
2490 struct ieee80211_channel
*chan
,
2491 const struct ieee80211_regdomain
*regd
,
2495 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2496 const struct ieee80211_power_rule
*power_rule
= NULL
;
2497 u32 bw
, center_freq_khz
;
2499 center_freq_khz
= ieee80211_channel_to_khz(chan
);
2500 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
2501 reg_rule
= freq_reg_info_regd(center_freq_khz
, regd
, bw
);
2502 if (!IS_ERR(reg_rule
))
2506 if (IS_ERR_OR_NULL(reg_rule
)) {
2507 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2508 chan
->center_freq
, chan
->freq_offset
);
2509 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
2510 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
2512 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
2513 chan
->flags
= chan
->orig_flags
;
2518 power_rule
= ®_rule
->power_rule
;
2519 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
2521 chan
->dfs_state_entered
= jiffies
;
2522 chan
->dfs_state
= NL80211_DFS_USABLE
;
2524 chan
->beacon_found
= false;
2526 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2527 chan
->flags
= chan
->orig_flags
| bw_flags
|
2528 map_regdom_flags(reg_rule
->flags
);
2530 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
2532 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
2533 chan
->max_reg_power
= chan
->max_power
=
2534 (int) MBM_TO_DBM(power_rule
->max_eirp
);
2536 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
2537 if (reg_rule
->dfs_cac_ms
)
2538 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
2540 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
2543 chan
->max_power
= chan
->max_reg_power
;
2546 static void handle_band_custom(struct wiphy
*wiphy
,
2547 struct ieee80211_supported_band
*sband
,
2548 const struct ieee80211_regdomain
*regd
)
2556 * We currently assume that you always want at least 20 MHz,
2557 * otherwise channel 12 might get enabled if this rule is
2558 * compatible to US, which permits 2402 - 2472 MHz.
2560 for (i
= 0; i
< sband
->n_channels
; i
++)
2561 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
,
2565 /* Used by drivers prior to wiphy registration */
2566 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
2567 const struct ieee80211_regdomain
*regd
)
2569 const struct ieee80211_regdomain
*new_regd
, *tmp
;
2570 enum nl80211_band band
;
2571 unsigned int bands_set
= 0;
2573 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
2574 "wiphy should have REGULATORY_CUSTOM_REG\n");
2575 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
2577 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2578 if (!wiphy
->bands
[band
])
2580 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2585 * no point in calling this if it won't have any effect
2586 * on your device's supported bands.
2588 WARN_ON(!bands_set
);
2589 new_regd
= reg_copy_regd(regd
);
2590 if (IS_ERR(new_regd
))
2596 tmp
= get_wiphy_regdom(wiphy
);
2597 rcu_assign_pointer(wiphy
->regd
, new_regd
);
2598 rcu_free_regdom(tmp
);
2600 wiphy_unlock(wiphy
);
2603 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
2605 static void reg_set_request_processed(void)
2607 bool need_more_processing
= false;
2608 struct regulatory_request
*lr
= get_last_request();
2610 lr
->processed
= true;
2612 spin_lock(®_requests_lock
);
2613 if (!list_empty(®_requests_list
))
2614 need_more_processing
= true;
2615 spin_unlock(®_requests_lock
);
2617 cancel_crda_timeout();
2619 if (need_more_processing
)
2620 schedule_work(®_work
);
2624 * reg_process_hint_core - process core regulatory requests
2625 * @core_request: a pending core regulatory request
2627 * The wireless subsystem can use this function to process
2628 * a regulatory request issued by the regulatory core.
2630 static enum reg_request_treatment
2631 reg_process_hint_core(struct regulatory_request
*core_request
)
2633 if (reg_query_database(core_request
)) {
2634 core_request
->intersect
= false;
2635 core_request
->processed
= false;
2636 reg_update_last_request(core_request
);
2640 return REG_REQ_IGNORE
;
2643 static enum reg_request_treatment
2644 __reg_process_hint_user(struct regulatory_request
*user_request
)
2646 struct regulatory_request
*lr
= get_last_request();
2648 if (reg_request_cell_base(user_request
))
2649 return reg_ignore_cell_hint(user_request
);
2651 if (reg_request_cell_base(lr
))
2652 return REG_REQ_IGNORE
;
2654 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2655 return REG_REQ_INTERSECT
;
2657 * If the user knows better the user should set the regdom
2658 * to their country before the IE is picked up
2660 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
2662 return REG_REQ_IGNORE
;
2664 * Process user requests only after previous user/driver/core
2665 * requests have been processed
2667 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
2668 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2669 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
2670 regdom_changes(lr
->alpha2
))
2671 return REG_REQ_IGNORE
;
2673 if (!regdom_changes(user_request
->alpha2
))
2674 return REG_REQ_ALREADY_SET
;
2680 * reg_process_hint_user - process user regulatory requests
2681 * @user_request: a pending user regulatory request
2683 * The wireless subsystem can use this function to process
2684 * a regulatory request initiated by userspace.
2686 static enum reg_request_treatment
2687 reg_process_hint_user(struct regulatory_request
*user_request
)
2689 enum reg_request_treatment treatment
;
2691 treatment
= __reg_process_hint_user(user_request
);
2692 if (treatment
== REG_REQ_IGNORE
||
2693 treatment
== REG_REQ_ALREADY_SET
)
2694 return REG_REQ_IGNORE
;
2696 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2697 user_request
->processed
= false;
2699 if (reg_query_database(user_request
)) {
2700 reg_update_last_request(user_request
);
2701 user_alpha2
[0] = user_request
->alpha2
[0];
2702 user_alpha2
[1] = user_request
->alpha2
[1];
2706 return REG_REQ_IGNORE
;
2709 static enum reg_request_treatment
2710 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
2712 struct regulatory_request
*lr
= get_last_request();
2714 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
2715 if (regdom_changes(driver_request
->alpha2
))
2717 return REG_REQ_ALREADY_SET
;
2721 * This would happen if you unplug and plug your card
2722 * back in or if you add a new device for which the previously
2723 * loaded card also agrees on the regulatory domain.
2725 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2726 !regdom_changes(driver_request
->alpha2
))
2727 return REG_REQ_ALREADY_SET
;
2729 return REG_REQ_INTERSECT
;
2733 * reg_process_hint_driver - process driver regulatory requests
2734 * @wiphy: the wireless device for the regulatory request
2735 * @driver_request: a pending driver regulatory request
2737 * The wireless subsystem can use this function to process
2738 * a regulatory request issued by an 802.11 driver.
2740 * Returns one of the different reg request treatment values.
2742 static enum reg_request_treatment
2743 reg_process_hint_driver(struct wiphy
*wiphy
,
2744 struct regulatory_request
*driver_request
)
2746 const struct ieee80211_regdomain
*regd
, *tmp
;
2747 enum reg_request_treatment treatment
;
2749 treatment
= __reg_process_hint_driver(driver_request
);
2751 switch (treatment
) {
2754 case REG_REQ_IGNORE
:
2755 return REG_REQ_IGNORE
;
2756 case REG_REQ_INTERSECT
:
2757 case REG_REQ_ALREADY_SET
:
2758 regd
= reg_copy_regd(get_cfg80211_regdom());
2760 return REG_REQ_IGNORE
;
2762 tmp
= get_wiphy_regdom(wiphy
);
2765 rcu_assign_pointer(wiphy
->regd
, regd
);
2766 wiphy_unlock(wiphy
);
2767 rcu_free_regdom(tmp
);
2771 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2772 driver_request
->processed
= false;
2775 * Since CRDA will not be called in this case as we already
2776 * have applied the requested regulatory domain before we just
2777 * inform userspace we have processed the request
2779 if (treatment
== REG_REQ_ALREADY_SET
) {
2780 nl80211_send_reg_change_event(driver_request
);
2781 reg_update_last_request(driver_request
);
2782 reg_set_request_processed();
2783 return REG_REQ_ALREADY_SET
;
2786 if (reg_query_database(driver_request
)) {
2787 reg_update_last_request(driver_request
);
2791 return REG_REQ_IGNORE
;
2794 static enum reg_request_treatment
2795 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2796 struct regulatory_request
*country_ie_request
)
2798 struct wiphy
*last_wiphy
= NULL
;
2799 struct regulatory_request
*lr
= get_last_request();
2801 if (reg_request_cell_base(lr
)) {
2802 /* Trust a Cell base station over the AP's country IE */
2803 if (regdom_changes(country_ie_request
->alpha2
))
2804 return REG_REQ_IGNORE
;
2805 return REG_REQ_ALREADY_SET
;
2807 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2808 return REG_REQ_IGNORE
;
2811 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2814 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2817 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2819 if (last_wiphy
!= wiphy
) {
2821 * Two cards with two APs claiming different
2822 * Country IE alpha2s. We could
2823 * intersect them, but that seems unlikely
2824 * to be correct. Reject second one for now.
2826 if (regdom_changes(country_ie_request
->alpha2
))
2827 return REG_REQ_IGNORE
;
2828 return REG_REQ_ALREADY_SET
;
2831 if (regdom_changes(country_ie_request
->alpha2
))
2833 return REG_REQ_ALREADY_SET
;
2837 * reg_process_hint_country_ie - process regulatory requests from country IEs
2838 * @wiphy: the wireless device for the regulatory request
2839 * @country_ie_request: a regulatory request from a country IE
2841 * The wireless subsystem can use this function to process
2842 * a regulatory request issued by a country Information Element.
2844 * Returns one of the different reg request treatment values.
2846 static enum reg_request_treatment
2847 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2848 struct regulatory_request
*country_ie_request
)
2850 enum reg_request_treatment treatment
;
2852 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2854 switch (treatment
) {
2857 case REG_REQ_IGNORE
:
2858 return REG_REQ_IGNORE
;
2859 case REG_REQ_ALREADY_SET
:
2860 reg_free_request(country_ie_request
);
2861 return REG_REQ_ALREADY_SET
;
2862 case REG_REQ_INTERSECT
:
2864 * This doesn't happen yet, not sure we
2865 * ever want to support it for this case.
2867 WARN_ONCE(1, "Unexpected intersection for country elements");
2868 return REG_REQ_IGNORE
;
2871 country_ie_request
->intersect
= false;
2872 country_ie_request
->processed
= false;
2874 if (reg_query_database(country_ie_request
)) {
2875 reg_update_last_request(country_ie_request
);
2879 return REG_REQ_IGNORE
;
2882 bool reg_dfs_domain_same(struct wiphy
*wiphy1
, struct wiphy
*wiphy2
)
2884 const struct ieee80211_regdomain
*wiphy1_regd
= NULL
;
2885 const struct ieee80211_regdomain
*wiphy2_regd
= NULL
;
2886 const struct ieee80211_regdomain
*cfg80211_regd
= NULL
;
2887 bool dfs_domain_same
;
2891 cfg80211_regd
= rcu_dereference(cfg80211_regdomain
);
2892 wiphy1_regd
= rcu_dereference(wiphy1
->regd
);
2894 wiphy1_regd
= cfg80211_regd
;
2896 wiphy2_regd
= rcu_dereference(wiphy2
->regd
);
2898 wiphy2_regd
= cfg80211_regd
;
2900 dfs_domain_same
= wiphy1_regd
->dfs_region
== wiphy2_regd
->dfs_region
;
2904 return dfs_domain_same
;
2907 static void reg_copy_dfs_chan_state(struct ieee80211_channel
*dst_chan
,
2908 struct ieee80211_channel
*src_chan
)
2910 if (!(dst_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2911 !(src_chan
->flags
& IEEE80211_CHAN_RADAR
))
2914 if (dst_chan
->flags
& IEEE80211_CHAN_DISABLED
||
2915 src_chan
->flags
& IEEE80211_CHAN_DISABLED
)
2918 if (src_chan
->center_freq
== dst_chan
->center_freq
&&
2919 dst_chan
->dfs_state
== NL80211_DFS_USABLE
) {
2920 dst_chan
->dfs_state
= src_chan
->dfs_state
;
2921 dst_chan
->dfs_state_entered
= src_chan
->dfs_state_entered
;
2925 static void wiphy_share_dfs_chan_state(struct wiphy
*dst_wiphy
,
2926 struct wiphy
*src_wiphy
)
2928 struct ieee80211_supported_band
*src_sband
, *dst_sband
;
2929 struct ieee80211_channel
*src_chan
, *dst_chan
;
2932 if (!reg_dfs_domain_same(dst_wiphy
, src_wiphy
))
2935 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2936 dst_sband
= dst_wiphy
->bands
[band
];
2937 src_sband
= src_wiphy
->bands
[band
];
2938 if (!dst_sband
|| !src_sband
)
2941 for (i
= 0; i
< dst_sband
->n_channels
; i
++) {
2942 dst_chan
= &dst_sband
->channels
[i
];
2943 for (j
= 0; j
< src_sband
->n_channels
; j
++) {
2944 src_chan
= &src_sband
->channels
[j
];
2945 reg_copy_dfs_chan_state(dst_chan
, src_chan
);
2951 static void wiphy_all_share_dfs_chan_state(struct wiphy
*wiphy
)
2953 struct cfg80211_registered_device
*rdev
;
2957 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2958 if (wiphy
== &rdev
->wiphy
)
2960 wiphy_share_dfs_chan_state(wiphy
, &rdev
->wiphy
);
2964 /* This processes *all* regulatory hints */
2965 static void reg_process_hint(struct regulatory_request
*reg_request
)
2967 struct wiphy
*wiphy
= NULL
;
2968 enum reg_request_treatment treatment
;
2969 enum nl80211_reg_initiator initiator
= reg_request
->initiator
;
2971 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2972 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2974 switch (initiator
) {
2975 case NL80211_REGDOM_SET_BY_CORE
:
2976 treatment
= reg_process_hint_core(reg_request
);
2978 case NL80211_REGDOM_SET_BY_USER
:
2979 treatment
= reg_process_hint_user(reg_request
);
2981 case NL80211_REGDOM_SET_BY_DRIVER
:
2984 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2986 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2989 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2992 WARN(1, "invalid initiator %d\n", initiator
);
2996 if (treatment
== REG_REQ_IGNORE
)
2999 WARN(treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_ALREADY_SET
,
3000 "unexpected treatment value %d\n", treatment
);
3002 /* This is required so that the orig_* parameters are saved.
3003 * NOTE: treatment must be set for any case that reaches here!
3005 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
3006 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
3007 wiphy_update_regulatory(wiphy
, initiator
);
3008 wiphy_all_share_dfs_chan_state(wiphy
);
3009 reg_check_channels();
3015 reg_free_request(reg_request
);
3018 static void notify_self_managed_wiphys(struct regulatory_request
*request
)
3020 struct cfg80211_registered_device
*rdev
;
3021 struct wiphy
*wiphy
;
3023 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3024 wiphy
= &rdev
->wiphy
;
3025 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
&&
3026 request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
3027 reg_call_notifier(wiphy
, request
);
3032 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3033 * Regulatory hints come on a first come first serve basis and we
3034 * must process each one atomically.
3036 static void reg_process_pending_hints(void)
3038 struct regulatory_request
*reg_request
, *lr
;
3040 lr
= get_last_request();
3042 /* When last_request->processed becomes true this will be rescheduled */
3043 if (lr
&& !lr
->processed
) {
3044 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3048 spin_lock(®_requests_lock
);
3050 if (list_empty(®_requests_list
)) {
3051 spin_unlock(®_requests_lock
);
3055 reg_request
= list_first_entry(®_requests_list
,
3056 struct regulatory_request
,
3058 list_del_init(®_request
->list
);
3060 spin_unlock(®_requests_lock
);
3062 notify_self_managed_wiphys(reg_request
);
3064 reg_process_hint(reg_request
);
3066 lr
= get_last_request();
3068 spin_lock(®_requests_lock
);
3069 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
3070 schedule_work(®_work
);
3071 spin_unlock(®_requests_lock
);
3074 /* Processes beacon hints -- this has nothing to do with country IEs */
3075 static void reg_process_pending_beacon_hints(void)
3077 struct cfg80211_registered_device
*rdev
;
3078 struct reg_beacon
*pending_beacon
, *tmp
;
3080 /* This goes through the _pending_ beacon list */
3081 spin_lock_bh(®_pending_beacons_lock
);
3083 list_for_each_entry_safe(pending_beacon
, tmp
,
3084 ®_pending_beacons
, list
) {
3085 list_del_init(&pending_beacon
->list
);
3087 /* Applies the beacon hint to current wiphys */
3088 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
3089 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
3091 /* Remembers the beacon hint for new wiphys or reg changes */
3092 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
3095 spin_unlock_bh(®_pending_beacons_lock
);
3098 static void reg_process_self_managed_hint(struct wiphy
*wiphy
)
3100 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
3101 const struct ieee80211_regdomain
*tmp
;
3102 const struct ieee80211_regdomain
*regd
;
3103 enum nl80211_band band
;
3104 struct regulatory_request request
= {};
3107 lockdep_assert_wiphy(wiphy
);
3109 spin_lock(®_requests_lock
);
3110 regd
= rdev
->requested_regd
;
3111 rdev
->requested_regd
= NULL
;
3112 spin_unlock(®_requests_lock
);
3117 tmp
= get_wiphy_regdom(wiphy
);
3118 rcu_assign_pointer(wiphy
->regd
, regd
);
3119 rcu_free_regdom(tmp
);
3121 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
3122 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
3124 reg_process_ht_flags(wiphy
);
3126 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
3127 request
.alpha2
[0] = regd
->alpha2
[0];
3128 request
.alpha2
[1] = regd
->alpha2
[1];
3129 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
3131 nl80211_send_wiphy_reg_change_event(&request
);
3134 static void reg_process_self_managed_hints(void)
3136 struct cfg80211_registered_device
*rdev
;
3140 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3141 wiphy_lock(&rdev
->wiphy
);
3142 reg_process_self_managed_hint(&rdev
->wiphy
);
3143 wiphy_unlock(&rdev
->wiphy
);
3146 reg_check_channels();
3149 static void reg_todo(struct work_struct
*work
)
3152 reg_process_pending_hints();
3153 reg_process_pending_beacon_hints();
3154 reg_process_self_managed_hints();
3158 static void queue_regulatory_request(struct regulatory_request
*request
)
3160 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
3161 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
3163 spin_lock(®_requests_lock
);
3164 list_add_tail(&request
->list
, ®_requests_list
);
3165 spin_unlock(®_requests_lock
);
3167 schedule_work(®_work
);
3171 * Core regulatory hint -- happens during cfg80211_init()
3172 * and when we restore regulatory settings.
3174 static int regulatory_hint_core(const char *alpha2
)
3176 struct regulatory_request
*request
;
3178 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3182 request
->alpha2
[0] = alpha2
[0];
3183 request
->alpha2
[1] = alpha2
[1];
3184 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
3185 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
3187 queue_regulatory_request(request
);
3193 int regulatory_hint_user(const char *alpha2
,
3194 enum nl80211_user_reg_hint_type user_reg_hint_type
)
3196 struct regulatory_request
*request
;
3198 if (WARN_ON(!alpha2
))
3201 if (!is_world_regdom(alpha2
) && !is_an_alpha2(alpha2
))
3204 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3208 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
3209 request
->alpha2
[0] = alpha2
[0];
3210 request
->alpha2
[1] = alpha2
[1];
3211 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
3212 request
->user_reg_hint_type
= user_reg_hint_type
;
3214 /* Allow calling CRDA again */
3215 reset_crda_timeouts();
3217 queue_regulatory_request(request
);
3222 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
3224 spin_lock(®_indoor_lock
);
3226 /* It is possible that more than one user space process is trying to
3227 * configure the indoor setting. To handle such cases, clear the indoor
3228 * setting in case that some process does not think that the device
3229 * is operating in an indoor environment. In addition, if a user space
3230 * process indicates that it is controlling the indoor setting, save its
3231 * portid, i.e., make it the owner.
3233 reg_is_indoor
= is_indoor
;
3234 if (reg_is_indoor
) {
3235 if (!reg_is_indoor_portid
)
3236 reg_is_indoor_portid
= portid
;
3238 reg_is_indoor_portid
= 0;
3241 spin_unlock(®_indoor_lock
);
3244 reg_check_channels();
3249 void regulatory_netlink_notify(u32 portid
)
3251 spin_lock(®_indoor_lock
);
3253 if (reg_is_indoor_portid
!= portid
) {
3254 spin_unlock(®_indoor_lock
);
3258 reg_is_indoor
= false;
3259 reg_is_indoor_portid
= 0;
3261 spin_unlock(®_indoor_lock
);
3263 reg_check_channels();
3267 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
3269 struct regulatory_request
*request
;
3271 if (WARN_ON(!alpha2
|| !wiphy
))
3274 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
3276 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3280 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
3282 request
->alpha2
[0] = alpha2
[0];
3283 request
->alpha2
[1] = alpha2
[1];
3284 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
3286 /* Allow calling CRDA again */
3287 reset_crda_timeouts();
3289 queue_regulatory_request(request
);
3293 EXPORT_SYMBOL(regulatory_hint
);
3295 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum nl80211_band band
,
3296 const u8
*country_ie
, u8 country_ie_len
)
3299 enum environment_cap env
= ENVIRON_ANY
;
3300 struct regulatory_request
*request
= NULL
, *lr
;
3302 /* IE len must be evenly divisible by 2 */
3303 if (country_ie_len
& 0x01)
3306 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
3309 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
3313 alpha2
[0] = country_ie
[0];
3314 alpha2
[1] = country_ie
[1];
3316 if (country_ie
[2] == 'I')
3317 env
= ENVIRON_INDOOR
;
3318 else if (country_ie
[2] == 'O')
3319 env
= ENVIRON_OUTDOOR
;
3322 lr
= get_last_request();
3328 * We will run this only upon a successful connection on cfg80211.
3329 * We leave conflict resolution to the workqueue, where can hold
3332 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
3333 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
3336 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
3337 request
->alpha2
[0] = alpha2
[0];
3338 request
->alpha2
[1] = alpha2
[1];
3339 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
3340 request
->country_ie_env
= env
;
3342 /* Allow calling CRDA again */
3343 reset_crda_timeouts();
3345 queue_regulatory_request(request
);
3352 static void restore_alpha2(char *alpha2
, bool reset_user
)
3354 /* indicates there is no alpha2 to consider for restoration */
3358 /* The user setting has precedence over the module parameter */
3359 if (is_user_regdom_saved()) {
3360 /* Unless we're asked to ignore it and reset it */
3362 pr_debug("Restoring regulatory settings including user preference\n");
3363 user_alpha2
[0] = '9';
3364 user_alpha2
[1] = '7';
3367 * If we're ignoring user settings, we still need to
3368 * check the module parameter to ensure we put things
3369 * back as they were for a full restore.
3371 if (!is_world_regdom(ieee80211_regdom
)) {
3372 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3373 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3374 alpha2
[0] = ieee80211_regdom
[0];
3375 alpha2
[1] = ieee80211_regdom
[1];
3378 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3379 user_alpha2
[0], user_alpha2
[1]);
3380 alpha2
[0] = user_alpha2
[0];
3381 alpha2
[1] = user_alpha2
[1];
3383 } else if (!is_world_regdom(ieee80211_regdom
)) {
3384 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3385 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3386 alpha2
[0] = ieee80211_regdom
[0];
3387 alpha2
[1] = ieee80211_regdom
[1];
3389 pr_debug("Restoring regulatory settings\n");
3392 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
3394 struct ieee80211_supported_band
*sband
;
3395 enum nl80211_band band
;
3396 struct ieee80211_channel
*chan
;
3399 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
3400 sband
= wiphy
->bands
[band
];
3403 for (i
= 0; i
< sband
->n_channels
; i
++) {
3404 chan
= &sband
->channels
[i
];
3405 chan
->flags
= chan
->orig_flags
;
3406 chan
->max_antenna_gain
= chan
->orig_mag
;
3407 chan
->max_power
= chan
->orig_mpwr
;
3408 chan
->beacon_found
= false;
3414 * Restoring regulatory settings involves ignoring any
3415 * possibly stale country IE information and user regulatory
3416 * settings if so desired, this includes any beacon hints
3417 * learned as we could have traveled outside to another country
3418 * after disconnection. To restore regulatory settings we do
3419 * exactly what we did at bootup:
3421 * - send a core regulatory hint
3422 * - send a user regulatory hint if applicable
3424 * Device drivers that send a regulatory hint for a specific country
3425 * keep their own regulatory domain on wiphy->regd so that does
3426 * not need to be remembered.
3428 static void restore_regulatory_settings(bool reset_user
, bool cached
)
3431 char world_alpha2
[2];
3432 struct reg_beacon
*reg_beacon
, *btmp
;
3433 LIST_HEAD(tmp_reg_req_list
);
3434 struct cfg80211_registered_device
*rdev
;
3439 * Clear the indoor setting in case that it is not controlled by user
3440 * space, as otherwise there is no guarantee that the device is still
3441 * operating in an indoor environment.
3443 spin_lock(®_indoor_lock
);
3444 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
3445 reg_is_indoor
= false;
3446 reg_check_channels();
3448 spin_unlock(®_indoor_lock
);
3450 reset_regdomains(true, &world_regdom
);
3451 restore_alpha2(alpha2
, reset_user
);
3454 * If there's any pending requests we simply
3455 * stash them to a temporary pending queue and
3456 * add then after we've restored regulatory
3459 spin_lock(®_requests_lock
);
3460 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
3461 spin_unlock(®_requests_lock
);
3463 /* Clear beacon hints */
3464 spin_lock_bh(®_pending_beacons_lock
);
3465 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3466 list_del(®_beacon
->list
);
3469 spin_unlock_bh(®_pending_beacons_lock
);
3471 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3472 list_del(®_beacon
->list
);
3476 /* First restore to the basic regulatory settings */
3477 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
3478 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
3480 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3481 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3483 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
3484 restore_custom_reg_settings(&rdev
->wiphy
);
3487 if (cached
&& (!is_an_alpha2(alpha2
) ||
3488 !IS_ERR_OR_NULL(cfg80211_user_regdom
))) {
3489 reset_regdomains(false, cfg80211_world_regdom
);
3490 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE
);
3491 print_regdomain(get_cfg80211_regdom());
3492 nl80211_send_reg_change_event(&core_request_world
);
3493 reg_set_request_processed();
3495 if (is_an_alpha2(alpha2
) &&
3496 !regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
)) {
3497 struct regulatory_request
*ureq
;
3499 spin_lock(®_requests_lock
);
3500 ureq
= list_last_entry(®_requests_list
,
3501 struct regulatory_request
,
3503 list_del(&ureq
->list
);
3504 spin_unlock(®_requests_lock
);
3506 notify_self_managed_wiphys(ureq
);
3507 reg_update_last_request(ureq
);
3508 set_regdom(reg_copy_regd(cfg80211_user_regdom
),
3509 REGD_SOURCE_CACHED
);
3512 regulatory_hint_core(world_alpha2
);
3515 * This restores the ieee80211_regdom module parameter
3516 * preference or the last user requested regulatory
3517 * settings, user regulatory settings takes precedence.
3519 if (is_an_alpha2(alpha2
))
3520 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
3523 spin_lock(®_requests_lock
);
3524 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
3525 spin_unlock(®_requests_lock
);
3527 pr_debug("Kicking the queue\n");
3529 schedule_work(®_work
);
3532 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag
)
3534 struct cfg80211_registered_device
*rdev
;
3535 struct wireless_dev
*wdev
;
3537 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3538 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
) {
3540 if (!(wdev
->wiphy
->regulatory_flags
& flag
)) {
3551 void regulatory_hint_disconnect(void)
3553 /* Restore of regulatory settings is not required when wiphy(s)
3554 * ignore IE from connected access point but clearance of beacon hints
3555 * is required when wiphy(s) supports beacon hints.
3557 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE
)) {
3558 struct reg_beacon
*reg_beacon
, *btmp
;
3560 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS
))
3563 spin_lock_bh(®_pending_beacons_lock
);
3564 list_for_each_entry_safe(reg_beacon
, btmp
,
3565 ®_pending_beacons
, list
) {
3566 list_del(®_beacon
->list
);
3569 spin_unlock_bh(®_pending_beacons_lock
);
3571 list_for_each_entry_safe(reg_beacon
, btmp
,
3572 ®_beacon_list
, list
) {
3573 list_del(®_beacon
->list
);
3580 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3581 restore_regulatory_settings(false, true);
3584 static bool freq_is_chan_12_13_14(u32 freq
)
3586 if (freq
== ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ
) ||
3587 freq
== ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ
) ||
3588 freq
== ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ
))
3593 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
3595 struct reg_beacon
*pending_beacon
;
3597 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
3598 if (ieee80211_channel_equal(beacon_chan
,
3599 &pending_beacon
->chan
))
3604 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
3605 struct ieee80211_channel
*beacon_chan
,
3608 struct reg_beacon
*reg_beacon
;
3611 if (beacon_chan
->beacon_found
||
3612 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
3613 (beacon_chan
->band
== NL80211_BAND_2GHZ
&&
3614 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
3617 spin_lock_bh(®_pending_beacons_lock
);
3618 processing
= pending_reg_beacon(beacon_chan
);
3619 spin_unlock_bh(®_pending_beacons_lock
);
3624 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
3628 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3629 beacon_chan
->center_freq
, beacon_chan
->freq_offset
,
3630 ieee80211_freq_khz_to_channel(
3631 ieee80211_channel_to_khz(beacon_chan
)),
3634 memcpy(®_beacon
->chan
, beacon_chan
,
3635 sizeof(struct ieee80211_channel
));
3638 * Since we can be called from BH or and non-BH context
3639 * we must use spin_lock_bh()
3641 spin_lock_bh(®_pending_beacons_lock
);
3642 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
3643 spin_unlock_bh(®_pending_beacons_lock
);
3645 schedule_work(®_work
);
3650 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
3653 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
3654 const struct ieee80211_freq_range
*freq_range
= NULL
;
3655 const struct ieee80211_power_rule
*power_rule
= NULL
;
3656 char bw
[32], cac_time
[32];
3658 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3660 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
3661 reg_rule
= &rd
->reg_rules
[i
];
3662 freq_range
= ®_rule
->freq_range
;
3663 power_rule
= ®_rule
->power_rule
;
3665 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
3666 snprintf(bw
, sizeof(bw
), "%d KHz, %u KHz AUTO",
3667 freq_range
->max_bandwidth_khz
,
3668 reg_get_max_bandwidth(rd
, reg_rule
));
3670 snprintf(bw
, sizeof(bw
), "%d KHz",
3671 freq_range
->max_bandwidth_khz
);
3673 if (reg_rule
->flags
& NL80211_RRF_DFS
)
3674 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
3675 reg_rule
->dfs_cac_ms
/1000);
3677 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
3681 * There may not be documentation for max antenna gain
3682 * in certain regions
3684 if (power_rule
->max_antenna_gain
)
3685 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3686 freq_range
->start_freq_khz
,
3687 freq_range
->end_freq_khz
,
3689 power_rule
->max_antenna_gain
,
3690 power_rule
->max_eirp
,
3693 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3694 freq_range
->start_freq_khz
,
3695 freq_range
->end_freq_khz
,
3697 power_rule
->max_eirp
,
3702 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
3704 switch (dfs_region
) {
3705 case NL80211_DFS_UNSET
:
3706 case NL80211_DFS_FCC
:
3707 case NL80211_DFS_ETSI
:
3708 case NL80211_DFS_JP
:
3711 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region
);
3716 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
3718 struct regulatory_request
*lr
= get_last_request();
3720 if (is_intersected_alpha2(rd
->alpha2
)) {
3721 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
3722 struct cfg80211_registered_device
*rdev
;
3723 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
3725 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3726 rdev
->country_ie_alpha2
[0],
3727 rdev
->country_ie_alpha2
[1]);
3729 pr_debug("Current regulatory domain intersected:\n");
3731 pr_debug("Current regulatory domain intersected:\n");
3732 } else if (is_world_regdom(rd
->alpha2
)) {
3733 pr_debug("World regulatory domain updated:\n");
3735 if (is_unknown_alpha2(rd
->alpha2
))
3736 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3738 if (reg_request_cell_base(lr
))
3739 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3740 rd
->alpha2
[0], rd
->alpha2
[1]);
3742 pr_debug("Regulatory domain changed to country: %c%c\n",
3743 rd
->alpha2
[0], rd
->alpha2
[1]);
3747 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
3751 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
3753 pr_debug("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
3757 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
3759 if (!is_world_regdom(rd
->alpha2
))
3761 update_world_regdomain(rd
);
3765 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
3766 struct regulatory_request
*user_request
)
3768 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3770 if (!regdom_changes(rd
->alpha2
))
3773 if (!is_valid_rd(rd
)) {
3774 pr_err("Invalid regulatory domain detected: %c%c\n",
3775 rd
->alpha2
[0], rd
->alpha2
[1]);
3776 print_regdomain_info(rd
);
3780 if (!user_request
->intersect
) {
3781 reset_regdomains(false, rd
);
3785 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3786 if (!intersected_rd
)
3791 reset_regdomains(false, intersected_rd
);
3796 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
3797 struct regulatory_request
*driver_request
)
3799 const struct ieee80211_regdomain
*regd
;
3800 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3801 const struct ieee80211_regdomain
*tmp
;
3802 struct wiphy
*request_wiphy
;
3804 if (is_world_regdom(rd
->alpha2
))
3807 if (!regdom_changes(rd
->alpha2
))
3810 if (!is_valid_rd(rd
)) {
3811 pr_err("Invalid regulatory domain detected: %c%c\n",
3812 rd
->alpha2
[0], rd
->alpha2
[1]);
3813 print_regdomain_info(rd
);
3817 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
3821 if (!driver_request
->intersect
) {
3823 wiphy_lock(request_wiphy
);
3824 if (request_wiphy
->regd
) {
3825 wiphy_unlock(request_wiphy
);
3829 regd
= reg_copy_regd(rd
);
3831 wiphy_unlock(request_wiphy
);
3832 return PTR_ERR(regd
);
3835 rcu_assign_pointer(request_wiphy
->regd
, regd
);
3836 wiphy_unlock(request_wiphy
);
3837 reset_regdomains(false, rd
);
3841 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3842 if (!intersected_rd
)
3846 * We can trash what CRDA provided now.
3847 * However if a driver requested this specific regulatory
3848 * domain we keep it for its private use
3850 tmp
= get_wiphy_regdom(request_wiphy
);
3851 rcu_assign_pointer(request_wiphy
->regd
, rd
);
3852 rcu_free_regdom(tmp
);
3856 reset_regdomains(false, intersected_rd
);
3861 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
3862 struct regulatory_request
*country_ie_request
)
3864 struct wiphy
*request_wiphy
;
3866 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
3867 !is_unknown_alpha2(rd
->alpha2
))
3871 * Lets only bother proceeding on the same alpha2 if the current
3872 * rd is non static (it means CRDA was present and was used last)
3873 * and the pending request came in from a country IE
3876 if (!is_valid_rd(rd
)) {
3877 pr_err("Invalid regulatory domain detected: %c%c\n",
3878 rd
->alpha2
[0], rd
->alpha2
[1]);
3879 print_regdomain_info(rd
);
3883 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
3887 if (country_ie_request
->intersect
)
3890 reset_regdomains(false, rd
);
3895 * Use this call to set the current regulatory domain. Conflicts with
3896 * multiple drivers can be ironed out later. Caller must've already
3897 * kmalloc'd the rd structure.
3899 int set_regdom(const struct ieee80211_regdomain
*rd
,
3900 enum ieee80211_regd_source regd_src
)
3902 struct regulatory_request
*lr
;
3903 bool user_reset
= false;
3906 if (IS_ERR_OR_NULL(rd
))
3909 if (!reg_is_valid_request(rd
->alpha2
)) {
3914 if (regd_src
== REGD_SOURCE_CRDA
)
3915 reset_crda_timeouts();
3917 lr
= get_last_request();
3919 /* Note that this doesn't update the wiphys, this is done below */
3920 switch (lr
->initiator
) {
3921 case NL80211_REGDOM_SET_BY_CORE
:
3922 r
= reg_set_rd_core(rd
);
3924 case NL80211_REGDOM_SET_BY_USER
:
3925 cfg80211_save_user_regdom(rd
);
3926 r
= reg_set_rd_user(rd
, lr
);
3929 case NL80211_REGDOM_SET_BY_DRIVER
:
3930 r
= reg_set_rd_driver(rd
, lr
);
3932 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
3933 r
= reg_set_rd_country_ie(rd
, lr
);
3936 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3944 reg_set_request_processed();
3947 /* Back to world regulatory in case of errors */
3948 restore_regulatory_settings(user_reset
, false);
3955 /* This would make this whole thing pointless */
3956 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3959 /* update all wiphys now with the new established regulatory domain */
3960 update_all_wiphy_regulatory(lr
->initiator
);
3962 print_regdomain(get_cfg80211_regdom());
3964 nl80211_send_reg_change_event(lr
);
3966 reg_set_request_processed();
3971 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3972 struct ieee80211_regdomain
*rd
)
3974 const struct ieee80211_regdomain
*regd
;
3975 const struct ieee80211_regdomain
*prev_regd
;
3976 struct cfg80211_registered_device
*rdev
;
3978 if (WARN_ON(!wiphy
|| !rd
))
3981 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3982 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3985 if (WARN(!is_valid_rd(rd
),
3986 "Invalid regulatory domain detected: %c%c\n",
3987 rd
->alpha2
[0], rd
->alpha2
[1])) {
3988 print_regdomain_info(rd
);
3992 regd
= reg_copy_regd(rd
);
3994 return PTR_ERR(regd
);
3996 rdev
= wiphy_to_rdev(wiphy
);
3998 spin_lock(®_requests_lock
);
3999 prev_regd
= rdev
->requested_regd
;
4000 rdev
->requested_regd
= regd
;
4001 spin_unlock(®_requests_lock
);
4007 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
4008 struct ieee80211_regdomain
*rd
)
4010 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
4015 schedule_work(®_work
);
4018 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
4020 int regulatory_set_wiphy_regd_sync(struct wiphy
*wiphy
,
4021 struct ieee80211_regdomain
*rd
)
4027 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
4031 /* process the request immediately */
4032 reg_process_self_managed_hint(wiphy
);
4033 reg_check_channels();
4036 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync
);
4038 void wiphy_regulatory_register(struct wiphy
*wiphy
)
4040 struct regulatory_request
*lr
= get_last_request();
4042 /* self-managed devices ignore beacon hints and country IE */
4043 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
4044 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
4045 REGULATORY_COUNTRY_IE_IGNORE
;
4048 * The last request may have been received before this
4049 * registration call. Call the driver notifier if
4050 * initiator is USER.
4052 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
4053 reg_call_notifier(wiphy
, lr
);
4056 if (!reg_dev_ignore_cell_hint(wiphy
))
4057 reg_num_devs_support_basehint
++;
4059 wiphy_update_regulatory(wiphy
, lr
->initiator
);
4060 wiphy_all_share_dfs_chan_state(wiphy
);
4061 reg_process_self_managed_hints();
4064 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
4066 struct wiphy
*request_wiphy
= NULL
;
4067 struct regulatory_request
*lr
;
4069 lr
= get_last_request();
4071 if (!reg_dev_ignore_cell_hint(wiphy
))
4072 reg_num_devs_support_basehint
--;
4074 rcu_free_regdom(get_wiphy_regdom(wiphy
));
4075 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
4078 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
4080 if (!request_wiphy
|| request_wiphy
!= wiphy
)
4083 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
4084 lr
->country_ie_env
= ENVIRON_ANY
;
4088 * See FCC notices for UNII band definitions
4089 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4090 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4092 int cfg80211_get_unii(int freq
)
4095 if (freq
>= 5150 && freq
<= 5250)
4099 if (freq
> 5250 && freq
<= 5350)
4103 if (freq
> 5350 && freq
<= 5470)
4107 if (freq
> 5470 && freq
<= 5725)
4111 if (freq
> 5725 && freq
<= 5825)
4115 if (freq
> 5925 && freq
<= 6425)
4119 if (freq
> 6425 && freq
<= 6525)
4123 if (freq
> 6525 && freq
<= 6875)
4127 if (freq
> 6875 && freq
<= 7125)
4133 bool regulatory_indoor_allowed(void)
4135 return reg_is_indoor
;
4138 bool regulatory_pre_cac_allowed(struct wiphy
*wiphy
)
4140 const struct ieee80211_regdomain
*regd
= NULL
;
4141 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
4142 bool pre_cac_allowed
= false;
4146 regd
= rcu_dereference(cfg80211_regdomain
);
4147 wiphy_regd
= rcu_dereference(wiphy
->regd
);
4149 if (regd
->dfs_region
== NL80211_DFS_ETSI
)
4150 pre_cac_allowed
= true;
4154 return pre_cac_allowed
;
4157 if (regd
->dfs_region
== wiphy_regd
->dfs_region
&&
4158 wiphy_regd
->dfs_region
== NL80211_DFS_ETSI
)
4159 pre_cac_allowed
= true;
4163 return pre_cac_allowed
;
4165 EXPORT_SYMBOL(regulatory_pre_cac_allowed
);
4167 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device
*rdev
)
4169 struct wireless_dev
*wdev
;
4170 /* If we finished CAC or received radar, we should end any
4171 * CAC running on the same channels.
4172 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4173 * either all channels are available - those the CAC_FINISHED
4174 * event has effected another wdev state, or there is a channel
4175 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4176 * event has effected another wdev state.
4177 * In both cases we should end the CAC on the wdev.
4179 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
) {
4180 if (wdev
->cac_started
&&
4181 !cfg80211_chandef_dfs_usable(&rdev
->wiphy
, &wdev
->chandef
))
4182 rdev_end_cac(rdev
, wdev
->netdev
);
4186 void regulatory_propagate_dfs_state(struct wiphy
*wiphy
,
4187 struct cfg80211_chan_def
*chandef
,
4188 enum nl80211_dfs_state dfs_state
,
4189 enum nl80211_radar_event event
)
4191 struct cfg80211_registered_device
*rdev
;
4195 if (WARN_ON(!cfg80211_chandef_valid(chandef
)))
4198 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
4199 if (wiphy
== &rdev
->wiphy
)
4202 if (!reg_dfs_domain_same(wiphy
, &rdev
->wiphy
))
4205 if (!ieee80211_get_channel(&rdev
->wiphy
,
4206 chandef
->chan
->center_freq
))
4209 cfg80211_set_dfs_state(&rdev
->wiphy
, chandef
, dfs_state
);
4211 if (event
== NL80211_RADAR_DETECTED
||
4212 event
== NL80211_RADAR_CAC_FINISHED
) {
4213 cfg80211_sched_dfs_chan_update(rdev
);
4214 cfg80211_check_and_end_cac(rdev
);
4217 nl80211_radar_notify(rdev
, chandef
, event
, NULL
, GFP_KERNEL
);
4221 static int __init
regulatory_init_db(void)
4226 * It's possible that - due to other bugs/issues - cfg80211
4227 * never called regulatory_init() below, or that it failed;
4228 * in that case, don't try to do any further work here as
4229 * it's doomed to lead to crashes.
4231 if (IS_ERR_OR_NULL(reg_pdev
))
4234 err
= load_builtin_regdb_keys();
4238 /* We always try to get an update for the static regdomain */
4239 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
4241 if (err
== -ENOMEM
) {
4242 platform_device_unregister(reg_pdev
);
4246 * N.B. kobject_uevent_env() can fail mainly for when we're out
4247 * memory which is handled and propagated appropriately above
4248 * but it can also fail during a netlink_broadcast() or during
4249 * early boot for call_usermodehelper(). For now treat these
4250 * errors as non-fatal.
4252 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4256 * Finally, if the user set the module parameter treat it
4259 if (!is_world_regdom(ieee80211_regdom
))
4260 regulatory_hint_user(ieee80211_regdom
,
4261 NL80211_USER_REG_HINT_USER
);
4266 late_initcall(regulatory_init_db
);
4269 int __init
regulatory_init(void)
4271 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
4272 if (IS_ERR(reg_pdev
))
4273 return PTR_ERR(reg_pdev
);
4275 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
4277 user_alpha2
[0] = '9';
4278 user_alpha2
[1] = '7';
4281 return regulatory_init_db();
4287 void regulatory_exit(void)
4289 struct regulatory_request
*reg_request
, *tmp
;
4290 struct reg_beacon
*reg_beacon
, *btmp
;
4292 cancel_work_sync(®_work
);
4293 cancel_crda_timeout_sync();
4294 cancel_delayed_work_sync(®_check_chans
);
4296 /* Lock to suppress warnings */
4298 reset_regdomains(true, NULL
);
4301 dev_set_uevent_suppress(®_pdev
->dev
, true);
4303 platform_device_unregister(reg_pdev
);
4305 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
4306 list_del(®_beacon
->list
);
4310 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
4311 list_del(®_beacon
->list
);
4315 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
4316 list_del(®_request
->list
);
4320 if (!IS_ERR_OR_NULL(regdb
))
4322 if (!IS_ERR_OR_NULL(cfg80211_user_regdom
))
4323 kfree(cfg80211_user_regdom
);
4325 free_regdb_keyring();