2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/nl80211.h>
16 #include <linux/debugfs.h>
17 #include <linux/notifier.h>
18 #include <linux/device.h>
19 #include <linux/etherdevice.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/sched.h>
22 #include <net/genetlink.h>
23 #include <net/cfg80211.h>
28 #include "wext-compat.h"
31 /* name for sysfs, %d is appended */
32 #define PHY_NAME "phy"
34 MODULE_AUTHOR("Johannes Berg");
35 MODULE_LICENSE("GPL");
36 MODULE_DESCRIPTION("wireless configuration support");
37 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME
);
39 /* RCU-protected (and RTNL for writers) */
40 LIST_HEAD(cfg80211_rdev_list
);
41 int cfg80211_rdev_list_generation
;
44 static struct dentry
*ieee80211_debugfs_dir
;
46 /* for the cleanup, scan and event works */
47 struct workqueue_struct
*cfg80211_wq
;
49 static bool cfg80211_disable_40mhz_24ghz
;
50 module_param(cfg80211_disable_40mhz_24ghz
, bool, 0644);
51 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz
,
52 "Disable 40MHz support in the 2.4GHz band");
54 struct cfg80211_registered_device
*cfg80211_rdev_by_wiphy_idx(int wiphy_idx
)
56 struct cfg80211_registered_device
*result
= NULL
, *rdev
;
60 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
61 if (rdev
->wiphy_idx
== wiphy_idx
) {
70 int get_wiphy_idx(struct wiphy
*wiphy
)
72 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
74 return rdev
->wiphy_idx
;
77 struct wiphy
*wiphy_idx_to_wiphy(int wiphy_idx
)
79 struct cfg80211_registered_device
*rdev
;
83 rdev
= cfg80211_rdev_by_wiphy_idx(wiphy_idx
);
89 static int cfg80211_dev_check_name(struct cfg80211_registered_device
*rdev
,
92 struct cfg80211_registered_device
*rdev2
;
93 int wiphy_idx
, taken
= -1, digits
;
97 /* prohibit calling the thing phy%d when %d is not its number */
98 sscanf(newname
, PHY_NAME
"%d%n", &wiphy_idx
, &taken
);
99 if (taken
== strlen(newname
) && wiphy_idx
!= rdev
->wiphy_idx
) {
100 /* count number of places needed to print wiphy_idx */
102 while (wiphy_idx
/= 10)
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
108 if (taken
== strlen(PHY_NAME
) + digits
)
112 /* Ensure another device does not already have this name. */
113 list_for_each_entry(rdev2
, &cfg80211_rdev_list
, list
)
114 if (strcmp(newname
, wiphy_name(&rdev2
->wiphy
)) == 0)
120 int cfg80211_dev_rename(struct cfg80211_registered_device
*rdev
,
127 /* Ignore nop renames */
128 if (strcmp(newname
, wiphy_name(&rdev
->wiphy
)) == 0)
131 result
= cfg80211_dev_check_name(rdev
, newname
);
135 result
= device_rename(&rdev
->wiphy
.dev
, newname
);
139 if (rdev
->wiphy
.debugfsdir
&&
140 !debugfs_rename(rdev
->wiphy
.debugfsdir
->d_parent
,
141 rdev
->wiphy
.debugfsdir
,
142 rdev
->wiphy
.debugfsdir
->d_parent
,
144 pr_err("failed to rename debugfs dir to %s!\n", newname
);
146 nl80211_notify_wiphy(rdev
, NL80211_CMD_NEW_WIPHY
);
151 int cfg80211_switch_netns(struct cfg80211_registered_device
*rdev
,
154 struct wireless_dev
*wdev
;
157 if (!(rdev
->wiphy
.flags
& WIPHY_FLAG_NETNS_OK
))
160 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
163 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
164 err
= dev_change_net_namespace(wdev
->netdev
, net
, "wlan%d");
167 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
171 /* failed -- clean up to old netns */
172 net
= wiphy_net(&rdev
->wiphy
);
174 list_for_each_entry_continue_reverse(wdev
, &rdev
->wdev_list
,
178 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
179 err
= dev_change_net_namespace(wdev
->netdev
, net
,
182 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
188 wiphy_net_set(&rdev
->wiphy
, net
);
190 err
= device_rename(&rdev
->wiphy
.dev
, dev_name(&rdev
->wiphy
.dev
));
196 static void cfg80211_rfkill_poll(struct rfkill
*rfkill
, void *data
)
198 struct cfg80211_registered_device
*rdev
= data
;
200 rdev_rfkill_poll(rdev
);
203 void cfg80211_stop_p2p_device(struct cfg80211_registered_device
*rdev
,
204 struct wireless_dev
*wdev
)
208 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_P2P_DEVICE
))
211 if (!wdev
->p2p_started
)
214 rdev_stop_p2p_device(rdev
, wdev
);
215 wdev
->p2p_started
= false;
219 if (rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
) {
220 if (WARN_ON(!rdev
->scan_req
->notified
))
221 rdev
->scan_req
->aborted
= true;
222 ___cfg80211_scan_done(rdev
, false);
226 void cfg80211_shutdown_all_interfaces(struct wiphy
*wiphy
)
228 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
229 struct wireless_dev
*wdev
;
233 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
235 dev_close(wdev
->netdev
);
238 /* otherwise, check iftype */
239 switch (wdev
->iftype
) {
240 case NL80211_IFTYPE_P2P_DEVICE
:
241 cfg80211_stop_p2p_device(rdev
, wdev
);
248 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces
);
250 static int cfg80211_rfkill_set_block(void *data
, bool blocked
)
252 struct cfg80211_registered_device
*rdev
= data
;
258 cfg80211_shutdown_all_interfaces(&rdev
->wiphy
);
264 static void cfg80211_rfkill_sync_work(struct work_struct
*work
)
266 struct cfg80211_registered_device
*rdev
;
268 rdev
= container_of(work
, struct cfg80211_registered_device
, rfkill_sync
);
269 cfg80211_rfkill_set_block(rdev
, rfkill_blocked(rdev
->rfkill
));
272 static void cfg80211_event_work(struct work_struct
*work
)
274 struct cfg80211_registered_device
*rdev
;
276 rdev
= container_of(work
, struct cfg80211_registered_device
,
280 cfg80211_process_rdev_events(rdev
);
284 void cfg80211_destroy_ifaces(struct cfg80211_registered_device
*rdev
)
286 struct cfg80211_iface_destroy
*item
;
290 spin_lock_irq(&rdev
->destroy_list_lock
);
291 while ((item
= list_first_entry_or_null(&rdev
->destroy_list
,
292 struct cfg80211_iface_destroy
,
294 struct wireless_dev
*wdev
, *tmp
;
295 u32 nlportid
= item
->nlportid
;
297 list_del(&item
->list
);
299 spin_unlock_irq(&rdev
->destroy_list_lock
);
301 list_for_each_entry_safe(wdev
, tmp
, &rdev
->wdev_list
, list
) {
302 if (nlportid
== wdev
->owner_nlportid
)
303 rdev_del_virtual_intf(rdev
, wdev
);
306 spin_lock_irq(&rdev
->destroy_list_lock
);
308 spin_unlock_irq(&rdev
->destroy_list_lock
);
311 static void cfg80211_destroy_iface_wk(struct work_struct
*work
)
313 struct cfg80211_registered_device
*rdev
;
315 rdev
= container_of(work
, struct cfg80211_registered_device
,
319 cfg80211_destroy_ifaces(rdev
);
323 /* exported functions */
325 struct wiphy
*wiphy_new_nm(const struct cfg80211_ops
*ops
, int sizeof_priv
,
326 const char *requested_name
)
328 static atomic_t wiphy_counter
= ATOMIC_INIT(0);
330 struct cfg80211_registered_device
*rdev
;
333 WARN_ON(ops
->add_key
&& (!ops
->del_key
|| !ops
->set_default_key
));
334 WARN_ON(ops
->auth
&& (!ops
->assoc
|| !ops
->deauth
|| !ops
->disassoc
));
335 WARN_ON(ops
->connect
&& !ops
->disconnect
);
336 WARN_ON(ops
->join_ibss
&& !ops
->leave_ibss
);
337 WARN_ON(ops
->add_virtual_intf
&& !ops
->del_virtual_intf
);
338 WARN_ON(ops
->add_station
&& !ops
->del_station
);
339 WARN_ON(ops
->add_mpath
&& !ops
->del_mpath
);
340 WARN_ON(ops
->join_mesh
&& !ops
->leave_mesh
);
342 alloc_size
= sizeof(*rdev
) + sizeof_priv
;
344 rdev
= kzalloc(alloc_size
, GFP_KERNEL
);
350 rdev
->wiphy_idx
= atomic_inc_return(&wiphy_counter
);
352 if (unlikely(rdev
->wiphy_idx
< 0)) {
354 atomic_dec(&wiphy_counter
);
359 /* atomic_inc_return makes it start at 1, make it start at 0 */
362 /* give it a proper name */
363 if (requested_name
&& requested_name
[0]) {
367 rv
= cfg80211_dev_check_name(rdev
, requested_name
);
371 goto use_default_name
;
374 rv
= dev_set_name(&rdev
->wiphy
.dev
, "%s", requested_name
);
377 goto use_default_name
;
380 /* NOTE: This is *probably* safe w/out holding rtnl because of
381 * the restrictions on phy names. Probably this call could
382 * fail if some other part of the kernel (re)named a device
383 * phyX. But, might should add some locking and check return
384 * value, and use a different name if this one exists?
386 dev_set_name(&rdev
->wiphy
.dev
, PHY_NAME
"%d", rdev
->wiphy_idx
);
389 INIT_LIST_HEAD(&rdev
->wdev_list
);
390 INIT_LIST_HEAD(&rdev
->beacon_registrations
);
391 spin_lock_init(&rdev
->beacon_registrations_lock
);
392 spin_lock_init(&rdev
->bss_lock
);
393 INIT_LIST_HEAD(&rdev
->bss_list
);
394 INIT_WORK(&rdev
->scan_done_wk
, __cfg80211_scan_done
);
395 INIT_WORK(&rdev
->sched_scan_results_wk
, __cfg80211_sched_scan_results
);
396 INIT_DELAYED_WORK(&rdev
->dfs_update_channels_wk
,
397 cfg80211_dfs_channels_update_work
);
398 #ifdef CONFIG_CFG80211_WEXT
399 rdev
->wiphy
.wext
= &cfg80211_wext_handler
;
402 device_initialize(&rdev
->wiphy
.dev
);
403 rdev
->wiphy
.dev
.class = &ieee80211_class
;
404 rdev
->wiphy
.dev
.platform_data
= rdev
;
406 INIT_LIST_HEAD(&rdev
->destroy_list
);
407 spin_lock_init(&rdev
->destroy_list_lock
);
408 INIT_WORK(&rdev
->destroy_work
, cfg80211_destroy_iface_wk
);
410 #ifdef CONFIG_CFG80211_DEFAULT_PS
411 rdev
->wiphy
.flags
|= WIPHY_FLAG_PS_ON_BY_DEFAULT
;
414 wiphy_net_set(&rdev
->wiphy
, &init_net
);
416 rdev
->rfkill_ops
.set_block
= cfg80211_rfkill_set_block
;
417 rdev
->rfkill
= rfkill_alloc(dev_name(&rdev
->wiphy
.dev
),
418 &rdev
->wiphy
.dev
, RFKILL_TYPE_WLAN
,
419 &rdev
->rfkill_ops
, rdev
);
426 INIT_WORK(&rdev
->rfkill_sync
, cfg80211_rfkill_sync_work
);
427 INIT_WORK(&rdev
->conn_work
, cfg80211_conn_work
);
428 INIT_WORK(&rdev
->event_work
, cfg80211_event_work
);
430 init_waitqueue_head(&rdev
->dev_wait
);
433 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
434 * Fragmentation and RTS threshold are disabled by default with the
437 rdev
->wiphy
.retry_short
= 7;
438 rdev
->wiphy
.retry_long
= 4;
439 rdev
->wiphy
.frag_threshold
= (u32
) -1;
440 rdev
->wiphy
.rts_threshold
= (u32
) -1;
441 rdev
->wiphy
.coverage_class
= 0;
443 rdev
->wiphy
.max_num_csa_counters
= 1;
447 EXPORT_SYMBOL(wiphy_new_nm
);
449 static int wiphy_verify_combinations(struct wiphy
*wiphy
)
451 const struct ieee80211_iface_combination
*c
;
454 for (i
= 0; i
< wiphy
->n_iface_combinations
; i
++) {
458 c
= &wiphy
->iface_combinations
[i
];
461 * Combinations with just one interface aren't real,
462 * however we make an exception for DFS.
464 if (WARN_ON((c
->max_interfaces
< 2) && !c
->radar_detect_widths
))
467 /* Need at least one channel */
468 if (WARN_ON(!c
->num_different_channels
))
472 * Put a sane limit on maximum number of different
473 * channels to simplify channel accounting code.
475 if (WARN_ON(c
->num_different_channels
>
476 CFG80211_MAX_NUM_DIFFERENT_CHANNELS
))
479 /* DFS only works on one channel. */
480 if (WARN_ON(c
->radar_detect_widths
&&
481 (c
->num_different_channels
> 1)))
484 if (WARN_ON(!c
->n_limits
))
487 for (j
= 0; j
< c
->n_limits
; j
++) {
488 u16 types
= c
->limits
[j
].types
;
490 /* interface types shouldn't overlap */
491 if (WARN_ON(types
& all_iftypes
))
493 all_iftypes
|= types
;
495 if (WARN_ON(!c
->limits
[j
].max
))
498 /* Shouldn't list software iftypes in combinations! */
499 if (WARN_ON(wiphy
->software_iftypes
& types
))
502 /* Only a single P2P_DEVICE can be allowed */
503 if (WARN_ON(types
& BIT(NL80211_IFTYPE_P2P_DEVICE
) &&
504 c
->limits
[j
].max
> 1))
507 cnt
+= c
->limits
[j
].max
;
509 * Don't advertise an unsupported type
512 if (WARN_ON((wiphy
->interface_modes
& types
) != types
))
516 /* You can't even choose that many! */
517 if (WARN_ON(cnt
< c
->max_interfaces
))
524 int wiphy_register(struct wiphy
*wiphy
)
526 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
528 enum ieee80211_band band
;
529 struct ieee80211_supported_band
*sband
;
530 bool have_band
= false;
532 u16 ifmodes
= wiphy
->interface_modes
;
535 if (WARN_ON(wiphy
->wowlan
&&
536 (wiphy
->wowlan
->flags
& WIPHY_WOWLAN_GTK_REKEY_FAILURE
) &&
537 !(wiphy
->wowlan
->flags
& WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
)))
539 if (WARN_ON(wiphy
->wowlan
&&
540 !wiphy
->wowlan
->flags
&& !wiphy
->wowlan
->n_patterns
&&
541 !wiphy
->wowlan
->tcp
))
545 if (WARN_ON(wiphy
->coalesce
&&
546 (!wiphy
->coalesce
->n_rules
||
547 !wiphy
->coalesce
->n_patterns
) &&
548 (!wiphy
->coalesce
->pattern_min_len
||
549 wiphy
->coalesce
->pattern_min_len
>
550 wiphy
->coalesce
->pattern_max_len
)))
553 if (WARN_ON(wiphy
->ap_sme_capa
&&
554 !(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
)))
557 if (WARN_ON(wiphy
->addresses
&& !wiphy
->n_addresses
))
560 if (WARN_ON(wiphy
->addresses
&&
561 !is_zero_ether_addr(wiphy
->perm_addr
) &&
562 memcmp(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
,
566 if (WARN_ON(wiphy
->max_acl_mac_addrs
&&
567 (!(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
) ||
568 !rdev
->ops
->set_mac_acl
)))
571 if (wiphy
->addresses
)
572 memcpy(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
, ETH_ALEN
);
574 /* sanity check ifmodes */
576 ifmodes
&= ((1 << NUM_NL80211_IFTYPES
) - 1) & ~1;
577 if (WARN_ON(ifmodes
!= wiphy
->interface_modes
))
578 wiphy
->interface_modes
= ifmodes
;
580 res
= wiphy_verify_combinations(wiphy
);
584 /* sanity check supported bands/channels */
585 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
586 sband
= wiphy
->bands
[band
];
591 if (WARN_ON(!sband
->n_channels
))
594 * on 60gHz band, there are no legacy rates, so
597 if (WARN_ON(band
!= IEEE80211_BAND_60GHZ
&&
602 * Since cfg80211_disable_40mhz_24ghz is global, we can
603 * modify the sband's ht data even if the driver uses a
604 * global structure for that.
606 if (cfg80211_disable_40mhz_24ghz
&&
607 band
== IEEE80211_BAND_2GHZ
&&
608 sband
->ht_cap
.ht_supported
) {
609 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
610 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SGI_40
;
614 * Since we use a u32 for rate bitmaps in
615 * ieee80211_get_response_rate, we cannot
616 * have more than 32 legacy rates.
618 if (WARN_ON(sband
->n_bitrates
> 32))
621 for (i
= 0; i
< sband
->n_channels
; i
++) {
622 sband
->channels
[i
].orig_flags
=
623 sband
->channels
[i
].flags
;
624 sband
->channels
[i
].orig_mag
= INT_MAX
;
625 sband
->channels
[i
].orig_mpwr
=
626 sband
->channels
[i
].max_power
;
627 sband
->channels
[i
].band
= band
;
639 if (WARN_ON(rdev
->wiphy
.wowlan
&& rdev
->wiphy
.wowlan
->n_patterns
&&
640 (!rdev
->wiphy
.wowlan
->pattern_min_len
||
641 rdev
->wiphy
.wowlan
->pattern_min_len
>
642 rdev
->wiphy
.wowlan
->pattern_max_len
)))
646 /* check and set up bitrates */
647 ieee80211_set_bitrate_flags(wiphy
);
649 rdev
->wiphy
.features
|= NL80211_FEATURE_SCAN_FLUSH
;
652 res
= device_add(&rdev
->wiphy
.dev
);
658 /* set up regulatory info */
659 wiphy_regulatory_register(wiphy
);
661 list_add_rcu(&rdev
->list
, &cfg80211_rdev_list
);
662 cfg80211_rdev_list_generation
++;
665 rdev
->wiphy
.debugfsdir
=
666 debugfs_create_dir(wiphy_name(&rdev
->wiphy
),
667 ieee80211_debugfs_dir
);
668 if (IS_ERR(rdev
->wiphy
.debugfsdir
))
669 rdev
->wiphy
.debugfsdir
= NULL
;
671 cfg80211_debugfs_rdev_add(rdev
);
672 nl80211_notify_wiphy(rdev
, NL80211_CMD_NEW_WIPHY
);
674 if (wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
675 struct regulatory_request request
;
677 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
678 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
679 request
.alpha2
[0] = '9';
680 request
.alpha2
[1] = '9';
682 nl80211_send_reg_change_event(&request
);
685 rdev
->wiphy
.registered
= true;
688 res
= rfkill_register(rdev
->rfkill
);
690 rfkill_destroy(rdev
->rfkill
);
692 wiphy_unregister(&rdev
->wiphy
);
698 EXPORT_SYMBOL(wiphy_register
);
700 void wiphy_rfkill_start_polling(struct wiphy
*wiphy
)
702 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
704 if (!rdev
->ops
->rfkill_poll
)
706 rdev
->rfkill_ops
.poll
= cfg80211_rfkill_poll
;
707 rfkill_resume_polling(rdev
->rfkill
);
709 EXPORT_SYMBOL(wiphy_rfkill_start_polling
);
711 void wiphy_rfkill_stop_polling(struct wiphy
*wiphy
)
713 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
715 rfkill_pause_polling(rdev
->rfkill
);
717 EXPORT_SYMBOL(wiphy_rfkill_stop_polling
);
719 void wiphy_unregister(struct wiphy
*wiphy
)
721 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
723 wait_event(rdev
->dev_wait
, ({
726 __count
= rdev
->opencount
;
731 rfkill_unregister(rdev
->rfkill
);
734 nl80211_notify_wiphy(rdev
, NL80211_CMD_DEL_WIPHY
);
735 rdev
->wiphy
.registered
= false;
737 WARN_ON(!list_empty(&rdev
->wdev_list
));
740 * First remove the hardware from everywhere, this makes
741 * it impossible to find from userspace.
743 debugfs_remove_recursive(rdev
->wiphy
.debugfsdir
);
744 list_del_rcu(&rdev
->list
);
748 * If this device got a regulatory hint tell core its
749 * free to listen now to a new shiny device regulatory hint
751 wiphy_regulatory_deregister(wiphy
);
753 cfg80211_rdev_list_generation
++;
754 device_del(&rdev
->wiphy
.dev
);
758 flush_work(&rdev
->scan_done_wk
);
759 cancel_work_sync(&rdev
->conn_work
);
760 flush_work(&rdev
->event_work
);
761 cancel_delayed_work_sync(&rdev
->dfs_update_channels_wk
);
762 flush_work(&rdev
->destroy_work
);
765 if (rdev
->wiphy
.wowlan_config
&& rdev
->ops
->set_wakeup
)
766 rdev_set_wakeup(rdev
, false);
768 cfg80211_rdev_free_wowlan(rdev
);
769 cfg80211_rdev_free_coalesce(rdev
);
771 EXPORT_SYMBOL(wiphy_unregister
);
773 void cfg80211_dev_free(struct cfg80211_registered_device
*rdev
)
775 struct cfg80211_internal_bss
*scan
, *tmp
;
776 struct cfg80211_beacon_registration
*reg
, *treg
;
777 rfkill_destroy(rdev
->rfkill
);
778 list_for_each_entry_safe(reg
, treg
, &rdev
->beacon_registrations
, list
) {
779 list_del(®
->list
);
782 list_for_each_entry_safe(scan
, tmp
, &rdev
->bss_list
, list
)
783 cfg80211_put_bss(&rdev
->wiphy
, &scan
->pub
);
787 void wiphy_free(struct wiphy
*wiphy
)
789 put_device(&wiphy
->dev
);
791 EXPORT_SYMBOL(wiphy_free
);
793 void wiphy_rfkill_set_hw_state(struct wiphy
*wiphy
, bool blocked
)
795 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
797 if (rfkill_set_hw_state(rdev
->rfkill
, blocked
))
798 schedule_work(&rdev
->rfkill_sync
);
800 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state
);
802 void cfg80211_unregister_wdev(struct wireless_dev
*wdev
)
804 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wdev
->wiphy
);
808 if (WARN_ON(wdev
->netdev
))
811 list_del_rcu(&wdev
->list
);
812 rdev
->devlist_generation
++;
814 switch (wdev
->iftype
) {
815 case NL80211_IFTYPE_P2P_DEVICE
:
816 cfg80211_stop_p2p_device(rdev
, wdev
);
823 EXPORT_SYMBOL(cfg80211_unregister_wdev
);
825 static const struct device_type wiphy_type
= {
829 void cfg80211_update_iface_num(struct cfg80211_registered_device
*rdev
,
830 enum nl80211_iftype iftype
, int num
)
834 rdev
->num_running_ifaces
+= num
;
835 if (iftype
== NL80211_IFTYPE_MONITOR
)
836 rdev
->num_running_monitor_ifaces
+= num
;
839 void __cfg80211_leave(struct cfg80211_registered_device
*rdev
,
840 struct wireless_dev
*wdev
)
842 struct net_device
*dev
= wdev
->netdev
;
845 ASSERT_WDEV_LOCK(wdev
);
847 switch (wdev
->iftype
) {
848 case NL80211_IFTYPE_ADHOC
:
849 __cfg80211_leave_ibss(rdev
, dev
, true);
851 case NL80211_IFTYPE_P2P_CLIENT
:
852 case NL80211_IFTYPE_STATION
:
853 if (rdev
->sched_scan_req
&& dev
== rdev
->sched_scan_req
->dev
)
854 __cfg80211_stop_sched_scan(rdev
, false);
856 #ifdef CONFIG_CFG80211_WEXT
857 kfree(wdev
->wext
.ie
);
858 wdev
->wext
.ie
= NULL
;
859 wdev
->wext
.ie_len
= 0;
860 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
862 cfg80211_disconnect(rdev
, dev
,
863 WLAN_REASON_DEAUTH_LEAVING
, true);
865 case NL80211_IFTYPE_MESH_POINT
:
866 __cfg80211_leave_mesh(rdev
, dev
);
868 case NL80211_IFTYPE_AP
:
869 case NL80211_IFTYPE_P2P_GO
:
870 __cfg80211_stop_ap(rdev
, dev
, true);
872 case NL80211_IFTYPE_OCB
:
873 __cfg80211_leave_ocb(rdev
, dev
);
875 case NL80211_IFTYPE_WDS
:
876 /* must be handled by mac80211/driver, has no APIs */
878 case NL80211_IFTYPE_P2P_DEVICE
:
879 /* cannot happen, has no netdev */
881 case NL80211_IFTYPE_AP_VLAN
:
882 case NL80211_IFTYPE_MONITOR
:
885 case NL80211_IFTYPE_UNSPECIFIED
:
886 case NUM_NL80211_IFTYPES
:
892 void cfg80211_leave(struct cfg80211_registered_device
*rdev
,
893 struct wireless_dev
*wdev
)
896 __cfg80211_leave(rdev
, wdev
);
900 void cfg80211_stop_iface(struct wiphy
*wiphy
, struct wireless_dev
*wdev
,
903 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
904 struct cfg80211_event
*ev
;
907 trace_cfg80211_stop_iface(wiphy
, wdev
);
909 ev
= kzalloc(sizeof(*ev
), gfp
);
913 ev
->type
= EVENT_STOPPED
;
915 spin_lock_irqsave(&wdev
->event_lock
, flags
);
916 list_add_tail(&ev
->list
, &wdev
->event_list
);
917 spin_unlock_irqrestore(&wdev
->event_lock
, flags
);
918 queue_work(cfg80211_wq
, &rdev
->event_work
);
920 EXPORT_SYMBOL(cfg80211_stop_iface
);
922 static int cfg80211_netdev_notifier_call(struct notifier_block
*nb
,
923 unsigned long state
, void *ptr
)
925 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
926 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
927 struct cfg80211_registered_device
*rdev
;
932 rdev
= wiphy_to_rdev(wdev
->wiphy
);
934 WARN_ON(wdev
->iftype
== NL80211_IFTYPE_UNSPECIFIED
);
937 case NETDEV_POST_INIT
:
938 SET_NETDEV_DEVTYPE(dev
, &wiphy_type
);
940 case NETDEV_REGISTER
:
942 * NB: cannot take rdev->mtx here because this may be
943 * called within code protected by it when interfaces
944 * are added with nl80211.
946 mutex_init(&wdev
->mtx
);
947 INIT_LIST_HEAD(&wdev
->event_list
);
948 spin_lock_init(&wdev
->event_lock
);
949 INIT_LIST_HEAD(&wdev
->mgmt_registrations
);
950 spin_lock_init(&wdev
->mgmt_registrations_lock
);
952 wdev
->identifier
= ++rdev
->wdev_id
;
953 list_add_rcu(&wdev
->list
, &rdev
->wdev_list
);
954 rdev
->devlist_generation
++;
955 /* can only change netns with wiphy */
956 dev
->features
|= NETIF_F_NETNS_LOCAL
;
958 if (sysfs_create_link(&dev
->dev
.kobj
, &rdev
->wiphy
.dev
.kobj
,
960 pr_err("failed to add phy80211 symlink to netdev!\n");
963 #ifdef CONFIG_CFG80211_WEXT
964 wdev
->wext
.default_key
= -1;
965 wdev
->wext
.default_mgmt_key
= -1;
966 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
969 if (wdev
->wiphy
->flags
& WIPHY_FLAG_PS_ON_BY_DEFAULT
)
973 /* allow mac80211 to determine the timeout */
974 wdev
->ps_timeout
= -1;
976 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
977 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
||
978 wdev
->iftype
== NL80211_IFTYPE_ADHOC
) && !wdev
->use_4addr
)
979 dev
->priv_flags
|= IFF_DONT_BRIDGE
;
981 case NETDEV_GOING_DOWN
:
982 cfg80211_leave(rdev
, wdev
);
985 cfg80211_update_iface_num(rdev
, wdev
->iftype
, -1);
986 if (rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
) {
987 if (WARN_ON(!rdev
->scan_req
->notified
))
988 rdev
->scan_req
->aborted
= true;
989 ___cfg80211_scan_done(rdev
, false);
992 if (WARN_ON(rdev
->sched_scan_req
&&
993 rdev
->sched_scan_req
->dev
== wdev
->netdev
)) {
994 __cfg80211_stop_sched_scan(rdev
, false);
998 wake_up(&rdev
->dev_wait
);
1001 cfg80211_update_iface_num(rdev
, wdev
->iftype
, 1);
1003 switch (wdev
->iftype
) {
1004 #ifdef CONFIG_CFG80211_WEXT
1005 case NL80211_IFTYPE_ADHOC
:
1006 cfg80211_ibss_wext_join(rdev
, wdev
);
1008 case NL80211_IFTYPE_STATION
:
1009 cfg80211_mgd_wext_connect(rdev
, wdev
);
1012 #ifdef CONFIG_MAC80211_MESH
1013 case NL80211_IFTYPE_MESH_POINT
:
1015 /* backward compat code... */
1016 struct mesh_setup setup
;
1017 memcpy(&setup
, &default_mesh_setup
,
1019 /* back compat only needed for mesh_id */
1020 setup
.mesh_id
= wdev
->ssid
;
1021 setup
.mesh_id_len
= wdev
->mesh_id_up_len
;
1022 if (wdev
->mesh_id_up_len
)
1023 __cfg80211_join_mesh(rdev
, dev
,
1025 &default_mesh_config
);
1036 * Configure power management to the driver here so that its
1037 * correctly set also after interface type changes etc.
1039 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
1040 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
) &&
1041 rdev
->ops
->set_power_mgmt
)
1042 if (rdev_set_power_mgmt(rdev
, dev
, wdev
->ps
,
1043 wdev
->ps_timeout
)) {
1044 /* assume this means it's off */
1048 case NETDEV_UNREGISTER
:
1050 * It is possible to get NETDEV_UNREGISTER
1051 * multiple times. To detect that, check
1052 * that the interface is still on the list
1053 * of registered interfaces, and only then
1054 * remove and clean it up.
1056 if (!list_empty(&wdev
->list
)) {
1057 sysfs_remove_link(&dev
->dev
.kobj
, "phy80211");
1058 list_del_rcu(&wdev
->list
);
1059 rdev
->devlist_generation
++;
1060 cfg80211_mlme_purge_registrations(wdev
);
1061 #ifdef CONFIG_CFG80211_WEXT
1062 kzfree(wdev
->wext
.keys
);
1066 * synchronise (so that we won't find this netdev
1067 * from other code any more) and then clear the list
1068 * head so that the above code can safely check for
1069 * !list_empty() to avoid double-cleanup.
1072 INIT_LIST_HEAD(&wdev
->list
);
1074 * Ensure that all events have been processed and
1077 cfg80211_process_wdev_events(wdev
);
1079 if (WARN_ON(wdev
->current_bss
)) {
1080 cfg80211_unhold_bss(wdev
->current_bss
);
1081 cfg80211_put_bss(wdev
->wiphy
, &wdev
->current_bss
->pub
);
1082 wdev
->current_bss
= NULL
;
1086 if (!(wdev
->wiphy
->interface_modes
& BIT(wdev
->iftype
)))
1087 return notifier_from_errno(-EOPNOTSUPP
);
1088 if (rfkill_blocked(rdev
->rfkill
))
1089 return notifier_from_errno(-ERFKILL
);
1098 static struct notifier_block cfg80211_netdev_notifier
= {
1099 .notifier_call
= cfg80211_netdev_notifier_call
,
1102 static void __net_exit
cfg80211_pernet_exit(struct net
*net
)
1104 struct cfg80211_registered_device
*rdev
;
1107 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1108 if (net_eq(wiphy_net(&rdev
->wiphy
), net
))
1109 WARN_ON(cfg80211_switch_netns(rdev
, &init_net
));
1114 static struct pernet_operations cfg80211_pernet_ops
= {
1115 .exit
= cfg80211_pernet_exit
,
1118 static int __init
cfg80211_init(void)
1122 err
= register_pernet_device(&cfg80211_pernet_ops
);
1124 goto out_fail_pernet
;
1126 err
= wiphy_sysfs_init();
1128 goto out_fail_sysfs
;
1130 err
= register_netdevice_notifier(&cfg80211_netdev_notifier
);
1132 goto out_fail_notifier
;
1134 err
= nl80211_init();
1136 goto out_fail_nl80211
;
1138 ieee80211_debugfs_dir
= debugfs_create_dir("ieee80211", NULL
);
1140 err
= regulatory_init();
1144 cfg80211_wq
= create_singlethread_workqueue("cfg80211");
1155 debugfs_remove(ieee80211_debugfs_dir
);
1157 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1161 unregister_pernet_device(&cfg80211_pernet_ops
);
1165 subsys_initcall(cfg80211_init
);
1167 static void __exit
cfg80211_exit(void)
1169 debugfs_remove(ieee80211_debugfs_dir
);
1171 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1174 unregister_pernet_device(&cfg80211_pernet_ops
);
1175 destroy_workqueue(cfg80211_wq
);
1177 module_exit(cfg80211_exit
);