2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
8 #include <linux/module.h>
10 #include <linux/list.h>
11 #include <linux/nl80211.h>
12 #include <linux/debugfs.h>
13 #include <linux/notifier.h>
14 #include <linux/device.h>
15 #include <linux/etherdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <net/genetlink.h>
18 #include <net/cfg80211.h>
23 #include "wext-compat.h"
25 /* name for sysfs, %d is appended */
26 #define PHY_NAME "phy"
28 MODULE_AUTHOR("Johannes Berg");
29 MODULE_LICENSE("GPL");
30 MODULE_DESCRIPTION("wireless configuration support");
32 /* RCU might be appropriate here since we usually
33 * only read the list, and that can happen quite
34 * often because we need to do it for each command */
35 LIST_HEAD(cfg80211_rdev_list
);
36 int cfg80211_rdev_list_generation
;
39 * This is used to protect the cfg80211_rdev_list
41 DEFINE_MUTEX(cfg80211_mutex
);
44 static struct dentry
*ieee80211_debugfs_dir
;
46 /* requires cfg80211_mutex to be held! */
47 struct cfg80211_registered_device
*cfg80211_rdev_by_wiphy_idx(int wiphy_idx
)
49 struct cfg80211_registered_device
*result
= NULL
, *rdev
;
51 if (!wiphy_idx_valid(wiphy_idx
))
54 assert_cfg80211_lock();
56 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
57 if (rdev
->wiphy_idx
== wiphy_idx
) {
66 int get_wiphy_idx(struct wiphy
*wiphy
)
68 struct cfg80211_registered_device
*rdev
;
70 return WIPHY_IDX_STALE
;
71 rdev
= wiphy_to_dev(wiphy
);
72 return rdev
->wiphy_idx
;
75 /* requires cfg80211_rdev_mutex to be held! */
76 struct wiphy
*wiphy_idx_to_wiphy(int wiphy_idx
)
78 struct cfg80211_registered_device
*rdev
;
80 if (!wiphy_idx_valid(wiphy_idx
))
83 assert_cfg80211_lock();
85 rdev
= cfg80211_rdev_by_wiphy_idx(wiphy_idx
);
91 /* requires cfg80211_mutex to be held! */
92 struct cfg80211_registered_device
*
93 __cfg80211_rdev_from_info(struct genl_info
*info
)
96 struct cfg80211_registered_device
*bywiphyidx
= NULL
, *byifidx
= NULL
;
97 struct net_device
*dev
;
100 assert_cfg80211_lock();
102 if (info
->attrs
[NL80211_ATTR_WIPHY
]) {
103 bywiphyidx
= cfg80211_rdev_by_wiphy_idx(
104 nla_get_u32(info
->attrs
[NL80211_ATTR_WIPHY
]));
108 if (info
->attrs
[NL80211_ATTR_IFINDEX
]) {
109 ifindex
= nla_get_u32(info
->attrs
[NL80211_ATTR_IFINDEX
]);
110 dev
= dev_get_by_index(genl_info_net(info
), ifindex
);
112 if (dev
->ieee80211_ptr
)
114 wiphy_to_dev(dev
->ieee80211_ptr
->wiphy
);
120 if (bywiphyidx
&& byifidx
) {
121 if (bywiphyidx
!= byifidx
)
122 return ERR_PTR(-EINVAL
);
124 return bywiphyidx
; /* == byifidx */
135 struct cfg80211_registered_device
*
136 cfg80211_get_dev_from_info(struct genl_info
*info
)
138 struct cfg80211_registered_device
*rdev
;
140 mutex_lock(&cfg80211_mutex
);
141 rdev
= __cfg80211_rdev_from_info(info
);
143 /* if it is not an error we grab the lock on
144 * it to assure it won't be going away while
145 * we operate on it */
147 mutex_lock(&rdev
->mtx
);
149 mutex_unlock(&cfg80211_mutex
);
154 struct cfg80211_registered_device
*
155 cfg80211_get_dev_from_ifindex(struct net
*net
, int ifindex
)
157 struct cfg80211_registered_device
*rdev
= ERR_PTR(-ENODEV
);
158 struct net_device
*dev
;
160 mutex_lock(&cfg80211_mutex
);
161 dev
= dev_get_by_index(net
, ifindex
);
164 if (dev
->ieee80211_ptr
) {
165 rdev
= wiphy_to_dev(dev
->ieee80211_ptr
->wiphy
);
166 mutex_lock(&rdev
->mtx
);
168 rdev
= ERR_PTR(-ENODEV
);
171 mutex_unlock(&cfg80211_mutex
);
175 /* requires cfg80211_mutex to be held */
176 int cfg80211_dev_rename(struct cfg80211_registered_device
*rdev
,
179 struct cfg80211_registered_device
*rdev2
;
180 int wiphy_idx
, taken
= -1, result
, digits
;
182 assert_cfg80211_lock();
184 /* prohibit calling the thing phy%d when %d is not its number */
185 sscanf(newname
, PHY_NAME
"%d%n", &wiphy_idx
, &taken
);
186 if (taken
== strlen(newname
) && wiphy_idx
!= rdev
->wiphy_idx
) {
187 /* count number of places needed to print wiphy_idx */
189 while (wiphy_idx
/= 10)
192 * deny the name if it is phy<idx> where <idx> is printed
193 * without leading zeroes. taken == strlen(newname) here
195 if (taken
== strlen(PHY_NAME
) + digits
)
200 /* Ignore nop renames */
201 if (strcmp(newname
, dev_name(&rdev
->wiphy
.dev
)) == 0)
204 /* Ensure another device does not already have this name. */
205 list_for_each_entry(rdev2
, &cfg80211_rdev_list
, list
)
206 if (strcmp(newname
, dev_name(&rdev2
->wiphy
.dev
)) == 0)
209 result
= device_rename(&rdev
->wiphy
.dev
, newname
);
213 if (rdev
->wiphy
.debugfsdir
&&
214 !debugfs_rename(rdev
->wiphy
.debugfsdir
->d_parent
,
215 rdev
->wiphy
.debugfsdir
,
216 rdev
->wiphy
.debugfsdir
->d_parent
,
218 printk(KERN_ERR
"cfg80211: failed to rename debugfs dir to %s!\n",
221 nl80211_notify_dev_rename(rdev
);
226 int cfg80211_switch_netns(struct cfg80211_registered_device
*rdev
,
229 struct wireless_dev
*wdev
;
232 if (!rdev
->wiphy
.netnsok
)
235 list_for_each_entry(wdev
, &rdev
->netdev_list
, list
) {
236 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
237 err
= dev_change_net_namespace(wdev
->netdev
, net
, "wlan%d");
240 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
244 /* failed -- clean up to old netns */
245 net
= wiphy_net(&rdev
->wiphy
);
247 list_for_each_entry_continue_reverse(wdev
, &rdev
->netdev_list
,
249 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
250 err
= dev_change_net_namespace(wdev
->netdev
, net
,
253 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
257 wiphy_net_set(&rdev
->wiphy
, net
);
262 static void cfg80211_rfkill_poll(struct rfkill
*rfkill
, void *data
)
264 struct cfg80211_registered_device
*rdev
= data
;
266 rdev
->ops
->rfkill_poll(&rdev
->wiphy
);
269 static int cfg80211_rfkill_set_block(void *data
, bool blocked
)
271 struct cfg80211_registered_device
*rdev
= data
;
272 struct wireless_dev
*wdev
;
278 mutex_lock(&rdev
->devlist_mtx
);
280 list_for_each_entry(wdev
, &rdev
->netdev_list
, list
)
281 dev_close(wdev
->netdev
);
283 mutex_unlock(&rdev
->devlist_mtx
);
289 static void cfg80211_rfkill_sync_work(struct work_struct
*work
)
291 struct cfg80211_registered_device
*rdev
;
293 rdev
= container_of(work
, struct cfg80211_registered_device
, rfkill_sync
);
294 cfg80211_rfkill_set_block(rdev
, rfkill_blocked(rdev
->rfkill
));
297 static void cfg80211_process_events(struct wireless_dev
*wdev
)
299 struct cfg80211_event
*ev
;
302 spin_lock_irqsave(&wdev
->event_lock
, flags
);
303 while (!list_empty(&wdev
->event_list
)) {
304 ev
= list_first_entry(&wdev
->event_list
,
305 struct cfg80211_event
, list
);
307 spin_unlock_irqrestore(&wdev
->event_lock
, flags
);
311 case EVENT_CONNECT_RESULT
:
312 __cfg80211_connect_result(
313 wdev
->netdev
, is_zero_ether_addr(ev
->cr
.bssid
) ?
315 ev
->cr
.req_ie
, ev
->cr
.req_ie_len
,
316 ev
->cr
.resp_ie
, ev
->cr
.resp_ie_len
,
318 ev
->cr
.status
== WLAN_STATUS_SUCCESS
,
322 __cfg80211_roamed(wdev
, ev
->rm
.bssid
,
323 ev
->rm
.req_ie
, ev
->rm
.req_ie_len
,
324 ev
->rm
.resp_ie
, ev
->rm
.resp_ie_len
);
326 case EVENT_DISCONNECTED
:
327 __cfg80211_disconnected(wdev
->netdev
,
328 ev
->dc
.ie
, ev
->dc
.ie_len
,
329 ev
->dc
.reason
, true);
331 case EVENT_IBSS_JOINED
:
332 __cfg80211_ibss_joined(wdev
->netdev
, ev
->ij
.bssid
);
339 spin_lock_irqsave(&wdev
->event_lock
, flags
);
341 spin_unlock_irqrestore(&wdev
->event_lock
, flags
);
344 static void cfg80211_event_work(struct work_struct
*work
)
346 struct cfg80211_registered_device
*rdev
;
347 struct wireless_dev
*wdev
;
349 rdev
= container_of(work
, struct cfg80211_registered_device
,
353 cfg80211_lock_rdev(rdev
);
354 mutex_lock(&rdev
->devlist_mtx
);
356 list_for_each_entry(wdev
, &rdev
->netdev_list
, list
)
357 cfg80211_process_events(wdev
);
359 mutex_unlock(&rdev
->devlist_mtx
);
360 cfg80211_unlock_rdev(rdev
);
364 /* exported functions */
366 struct wiphy
*wiphy_new(const struct cfg80211_ops
*ops
, int sizeof_priv
)
368 static int wiphy_counter
;
370 struct cfg80211_registered_device
*rdev
;
373 WARN_ON(ops
->add_key
&& (!ops
->del_key
|| !ops
->set_default_key
));
374 WARN_ON(ops
->auth
&& (!ops
->assoc
|| !ops
->deauth
|| !ops
->disassoc
));
375 WARN_ON(ops
->connect
&& !ops
->disconnect
);
376 WARN_ON(ops
->join_ibss
&& !ops
->leave_ibss
);
377 WARN_ON(ops
->add_virtual_intf
&& !ops
->del_virtual_intf
);
378 WARN_ON(ops
->add_station
&& !ops
->del_station
);
379 WARN_ON(ops
->add_mpath
&& !ops
->del_mpath
);
381 alloc_size
= sizeof(*rdev
) + sizeof_priv
;
383 rdev
= kzalloc(alloc_size
, GFP_KERNEL
);
389 mutex_lock(&cfg80211_mutex
);
391 rdev
->wiphy_idx
= wiphy_counter
++;
393 if (unlikely(!wiphy_idx_valid(rdev
->wiphy_idx
))) {
395 mutex_unlock(&cfg80211_mutex
);
401 mutex_unlock(&cfg80211_mutex
);
403 /* give it a proper name */
404 dev_set_name(&rdev
->wiphy
.dev
, PHY_NAME
"%d", rdev
->wiphy_idx
);
406 mutex_init(&rdev
->mtx
);
407 mutex_init(&rdev
->devlist_mtx
);
408 INIT_LIST_HEAD(&rdev
->netdev_list
);
409 spin_lock_init(&rdev
->bss_lock
);
410 INIT_LIST_HEAD(&rdev
->bss_list
);
411 INIT_WORK(&rdev
->scan_done_wk
, __cfg80211_scan_done
);
413 device_initialize(&rdev
->wiphy
.dev
);
414 rdev
->wiphy
.dev
.class = &ieee80211_class
;
415 rdev
->wiphy
.dev
.platform_data
= rdev
;
417 rdev
->wiphy
.ps_default
= CONFIG_CFG80211_DEFAULT_PS_VALUE
;
419 wiphy_net_set(&rdev
->wiphy
, &init_net
);
421 rdev
->rfkill_ops
.set_block
= cfg80211_rfkill_set_block
;
422 rdev
->rfkill
= rfkill_alloc(dev_name(&rdev
->wiphy
.dev
),
423 &rdev
->wiphy
.dev
, RFKILL_TYPE_WLAN
,
424 &rdev
->rfkill_ops
, rdev
);
431 INIT_WORK(&rdev
->rfkill_sync
, cfg80211_rfkill_sync_work
);
432 INIT_WORK(&rdev
->conn_work
, cfg80211_conn_work
);
433 INIT_WORK(&rdev
->event_work
, cfg80211_event_work
);
435 init_waitqueue_head(&rdev
->dev_wait
);
438 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
439 * Fragmentation and RTS threshold are disabled by default with the
442 rdev
->wiphy
.retry_short
= 7;
443 rdev
->wiphy
.retry_long
= 4;
444 rdev
->wiphy
.frag_threshold
= (u32
) -1;
445 rdev
->wiphy
.rts_threshold
= (u32
) -1;
449 EXPORT_SYMBOL(wiphy_new
);
451 int wiphy_register(struct wiphy
*wiphy
)
453 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
455 enum ieee80211_band band
;
456 struct ieee80211_supported_band
*sband
;
457 bool have_band
= false;
459 u16 ifmodes
= wiphy
->interface_modes
;
461 /* sanity check ifmodes */
463 ifmodes
&= ((1 << __NL80211_IFTYPE_AFTER_LAST
) - 1) & ~1;
464 if (WARN_ON(ifmodes
!= wiphy
->interface_modes
))
465 wiphy
->interface_modes
= ifmodes
;
467 /* sanity check supported bands/channels */
468 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
469 sband
= wiphy
->bands
[band
];
475 if (WARN_ON(!sband
->n_channels
|| !sband
->n_bitrates
))
479 * Since we use a u32 for rate bitmaps in
480 * ieee80211_get_response_rate, we cannot
481 * have more than 32 legacy rates.
483 if (WARN_ON(sband
->n_bitrates
> 32))
486 for (i
= 0; i
< sband
->n_channels
; i
++) {
487 sband
->channels
[i
].orig_flags
=
488 sband
->channels
[i
].flags
;
489 sband
->channels
[i
].orig_mag
=
490 sband
->channels
[i
].max_antenna_gain
;
491 sband
->channels
[i
].orig_mpwr
=
492 sband
->channels
[i
].max_power
;
493 sband
->channels
[i
].band
= band
;
504 /* check and set up bitrates */
505 ieee80211_set_bitrate_flags(wiphy
);
507 res
= device_add(&rdev
->wiphy
.dev
);
511 res
= rfkill_register(rdev
->rfkill
);
515 mutex_lock(&cfg80211_mutex
);
517 /* set up regulatory info */
518 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
520 list_add(&rdev
->list
, &cfg80211_rdev_list
);
521 cfg80211_rdev_list_generation
++;
523 mutex_unlock(&cfg80211_mutex
);
526 rdev
->wiphy
.debugfsdir
=
527 debugfs_create_dir(wiphy_name(&rdev
->wiphy
),
528 ieee80211_debugfs_dir
);
529 if (IS_ERR(rdev
->wiphy
.debugfsdir
))
530 rdev
->wiphy
.debugfsdir
= NULL
;
532 if (wiphy
->custom_regulatory
) {
533 struct regulatory_request request
;
535 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
536 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
537 request
.alpha2
[0] = '9';
538 request
.alpha2
[1] = '9';
540 nl80211_send_reg_change_event(&request
);
543 cfg80211_debugfs_rdev_add(rdev
);
548 device_del(&rdev
->wiphy
.dev
);
551 EXPORT_SYMBOL(wiphy_register
);
553 void wiphy_rfkill_start_polling(struct wiphy
*wiphy
)
555 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
557 if (!rdev
->ops
->rfkill_poll
)
559 rdev
->rfkill_ops
.poll
= cfg80211_rfkill_poll
;
560 rfkill_resume_polling(rdev
->rfkill
);
562 EXPORT_SYMBOL(wiphy_rfkill_start_polling
);
564 void wiphy_rfkill_stop_polling(struct wiphy
*wiphy
)
566 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
568 rfkill_pause_polling(rdev
->rfkill
);
570 EXPORT_SYMBOL(wiphy_rfkill_stop_polling
);
572 void wiphy_unregister(struct wiphy
*wiphy
)
574 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
576 rfkill_unregister(rdev
->rfkill
);
578 /* protect the device list */
579 mutex_lock(&cfg80211_mutex
);
581 wait_event(rdev
->dev_wait
, ({
583 mutex_lock(&rdev
->devlist_mtx
);
584 __count
= rdev
->opencount
;
585 mutex_unlock(&rdev
->devlist_mtx
);
588 mutex_lock(&rdev
->devlist_mtx
);
589 BUG_ON(!list_empty(&rdev
->netdev_list
));
590 mutex_unlock(&rdev
->devlist_mtx
);
593 * First remove the hardware from everywhere, this makes
594 * it impossible to find from userspace.
596 cfg80211_debugfs_rdev_del(rdev
);
597 list_del(&rdev
->list
);
600 * Try to grab rdev->mtx. If a command is still in progress,
601 * hopefully the driver will refuse it since it's tearing
602 * down the device already. We wait for this command to complete
603 * before unlinking the item from the list.
604 * Note: as codified by the BUG_ON above we cannot get here if
605 * a virtual interface is still present. Hence, we can only get
606 * to lock contention here if userspace issues a command that
607 * identified the hardware by wiphy index.
609 cfg80211_lock_rdev(rdev
);
611 cfg80211_unlock_rdev(rdev
);
613 /* If this device got a regulatory hint tell core its
614 * free to listen now to a new shiny device regulatory hint */
615 reg_device_remove(wiphy
);
617 cfg80211_rdev_list_generation
++;
618 device_del(&rdev
->wiphy
.dev
);
619 debugfs_remove(rdev
->wiphy
.debugfsdir
);
621 mutex_unlock(&cfg80211_mutex
);
623 flush_work(&rdev
->scan_done_wk
);
624 cancel_work_sync(&rdev
->conn_work
);
625 flush_work(&rdev
->event_work
);
627 EXPORT_SYMBOL(wiphy_unregister
);
629 void cfg80211_dev_free(struct cfg80211_registered_device
*rdev
)
631 struct cfg80211_internal_bss
*scan
, *tmp
;
632 rfkill_destroy(rdev
->rfkill
);
633 mutex_destroy(&rdev
->mtx
);
634 mutex_destroy(&rdev
->devlist_mtx
);
635 list_for_each_entry_safe(scan
, tmp
, &rdev
->bss_list
, list
)
636 cfg80211_put_bss(&scan
->pub
);
640 void wiphy_free(struct wiphy
*wiphy
)
642 put_device(&wiphy
->dev
);
644 EXPORT_SYMBOL(wiphy_free
);
646 void wiphy_rfkill_set_hw_state(struct wiphy
*wiphy
, bool blocked
)
648 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
650 if (rfkill_set_hw_state(rdev
->rfkill
, blocked
))
651 schedule_work(&rdev
->rfkill_sync
);
653 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state
);
655 static void wdev_cleanup_work(struct work_struct
*work
)
657 struct wireless_dev
*wdev
;
658 struct cfg80211_registered_device
*rdev
;
660 wdev
= container_of(work
, struct wireless_dev
, cleanup_work
);
661 rdev
= wiphy_to_dev(wdev
->wiphy
);
663 cfg80211_lock_rdev(rdev
);
665 if (WARN_ON(rdev
->scan_req
&& rdev
->scan_req
->dev
== wdev
->netdev
)) {
666 rdev
->scan_req
->aborted
= true;
667 ___cfg80211_scan_done(rdev
, true);
670 cfg80211_unlock_rdev(rdev
);
672 mutex_lock(&rdev
->devlist_mtx
);
674 mutex_unlock(&rdev
->devlist_mtx
);
675 wake_up(&rdev
->dev_wait
);
677 dev_put(wdev
->netdev
);
680 static int cfg80211_netdev_notifier_call(struct notifier_block
* nb
,
684 struct net_device
*dev
= ndev
;
685 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
686 struct cfg80211_registered_device
*rdev
;
691 rdev
= wiphy_to_dev(wdev
->wiphy
);
693 WARN_ON(wdev
->iftype
== NL80211_IFTYPE_UNSPECIFIED
);
696 case NETDEV_REGISTER
:
698 * NB: cannot take rdev->mtx here because this may be
699 * called within code protected by it when interfaces
700 * are added with nl80211.
702 mutex_init(&wdev
->mtx
);
703 INIT_WORK(&wdev
->cleanup_work
, wdev_cleanup_work
);
704 INIT_LIST_HEAD(&wdev
->event_list
);
705 spin_lock_init(&wdev
->event_lock
);
706 mutex_lock(&rdev
->devlist_mtx
);
707 list_add(&wdev
->list
, &rdev
->netdev_list
);
708 rdev
->devlist_generation
++;
709 /* can only change netns with wiphy */
710 dev
->features
|= NETIF_F_NETNS_LOCAL
;
712 if (sysfs_create_link(&dev
->dev
.kobj
, &rdev
->wiphy
.dev
.kobj
,
714 printk(KERN_ERR
"wireless: failed to add phy80211 "
715 "symlink to netdev!\n");
718 wdev
->sme_state
= CFG80211_SME_IDLE
;
719 mutex_unlock(&rdev
->devlist_mtx
);
720 #ifdef CONFIG_WIRELESS_EXT
721 if (!dev
->wireless_handlers
)
722 dev
->wireless_handlers
= &cfg80211_wext_handler
;
723 wdev
->wext
.default_key
= -1;
724 wdev
->wext
.default_mgmt_key
= -1;
725 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
726 wdev
->wext
.ps
= wdev
->wiphy
->ps_default
;
727 wdev
->wext
.ps_timeout
= 100;
728 if (rdev
->ops
->set_power_mgmt
)
729 if (rdev
->ops
->set_power_mgmt(wdev
->wiphy
, dev
,
731 wdev
->wext
.ps_timeout
)) {
732 /* assume this means it's off */
733 wdev
->wext
.ps
= false;
737 case NETDEV_GOING_DOWN
:
738 switch (wdev
->iftype
) {
739 case NL80211_IFTYPE_ADHOC
:
740 cfg80211_leave_ibss(rdev
, dev
, true);
742 case NL80211_IFTYPE_STATION
:
744 #ifdef CONFIG_WIRELESS_EXT
745 kfree(wdev
->wext
.ie
);
746 wdev
->wext
.ie
= NULL
;
747 wdev
->wext
.ie_len
= 0;
748 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
750 __cfg80211_disconnect(rdev
, dev
,
751 WLAN_REASON_DEAUTH_LEAVING
, true);
752 cfg80211_mlme_down(rdev
, dev
);
761 schedule_work(&wdev
->cleanup_work
);
765 * If we have a really quick DOWN/UP succession we may
766 * have this work still pending ... cancel it and see
767 * if it was pending, in which case we need to account
768 * for some of the work it would have done.
770 if (cancel_work_sync(&wdev
->cleanup_work
)) {
771 mutex_lock(&rdev
->devlist_mtx
);
773 mutex_unlock(&rdev
->devlist_mtx
);
776 #ifdef CONFIG_WIRELESS_EXT
777 cfg80211_lock_rdev(rdev
);
778 mutex_lock(&rdev
->devlist_mtx
);
780 switch (wdev
->iftype
) {
781 case NL80211_IFTYPE_ADHOC
:
782 cfg80211_ibss_wext_join(rdev
, wdev
);
784 case NL80211_IFTYPE_STATION
:
785 cfg80211_mgd_wext_connect(rdev
, wdev
);
792 mutex_unlock(&rdev
->devlist_mtx
);
793 cfg80211_unlock_rdev(rdev
);
796 case NETDEV_UNREGISTER
:
798 * NB: cannot take rdev->mtx here because this may be
799 * called within code protected by it when interfaces
800 * are removed with nl80211.
802 mutex_lock(&rdev
->devlist_mtx
);
804 * It is possible to get NETDEV_UNREGISTER
805 * multiple times. To detect that, check
806 * that the interface is still on the list
807 * of registered interfaces, and only then
808 * remove and clean it up.
810 if (!list_empty(&wdev
->list
)) {
811 sysfs_remove_link(&dev
->dev
.kobj
, "phy80211");
812 list_del_init(&wdev
->list
);
813 rdev
->devlist_generation
++;
814 #ifdef CONFIG_WIRELESS_EXT
815 kfree(wdev
->wext
.keys
);
818 mutex_unlock(&rdev
->devlist_mtx
);
821 if (!(wdev
->wiphy
->interface_modes
& BIT(wdev
->iftype
)))
822 return notifier_from_errno(-EOPNOTSUPP
);
823 if (rfkill_blocked(rdev
->rfkill
))
824 return notifier_from_errno(-ERFKILL
);
831 static struct notifier_block cfg80211_netdev_notifier
= {
832 .notifier_call
= cfg80211_netdev_notifier_call
,
835 static void __net_exit
cfg80211_pernet_exit(struct net
*net
)
837 struct cfg80211_registered_device
*rdev
;
840 mutex_lock(&cfg80211_mutex
);
841 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
842 if (net_eq(wiphy_net(&rdev
->wiphy
), net
))
843 WARN_ON(cfg80211_switch_netns(rdev
, &init_net
));
845 mutex_unlock(&cfg80211_mutex
);
849 static struct pernet_operations cfg80211_pernet_ops
= {
850 .exit
= cfg80211_pernet_exit
,
853 static int __init
cfg80211_init(void)
857 err
= register_pernet_device(&cfg80211_pernet_ops
);
859 goto out_fail_pernet
;
861 err
= wiphy_sysfs_init();
865 err
= register_netdevice_notifier(&cfg80211_netdev_notifier
);
867 goto out_fail_notifier
;
869 err
= nl80211_init();
871 goto out_fail_nl80211
;
873 ieee80211_debugfs_dir
= debugfs_create_dir("ieee80211", NULL
);
875 err
= regulatory_init();
882 debugfs_remove(ieee80211_debugfs_dir
);
884 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
888 unregister_pernet_device(&cfg80211_pernet_ops
);
892 subsys_initcall(cfg80211_init
);
894 static void cfg80211_exit(void)
896 debugfs_remove(ieee80211_debugfs_dir
);
898 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
901 unregister_pernet_device(&cfg80211_pernet_ops
);
903 module_exit(cfg80211_exit
);