2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/nl80211.h>
15 #include <linux/debugfs.h>
16 #include <linux/notifier.h>
17 #include <linux/device.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/sched.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
27 #include "wext-compat.h"
30 /* name for sysfs, %d is appended */
31 #define PHY_NAME "phy"
33 MODULE_AUTHOR("Johannes Berg");
34 MODULE_LICENSE("GPL");
35 MODULE_DESCRIPTION("wireless configuration support");
37 /* RCU-protected (and cfg80211_mutex for writers) */
38 LIST_HEAD(cfg80211_rdev_list
);
39 int cfg80211_rdev_list_generation
;
41 DEFINE_MUTEX(cfg80211_mutex
);
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 /* requires cfg80211_mutex to be held! */
55 struct cfg80211_registered_device
*cfg80211_rdev_by_wiphy_idx(int wiphy_idx
)
57 struct cfg80211_registered_device
*result
= NULL
, *rdev
;
59 if (!wiphy_idx_valid(wiphy_idx
))
62 assert_cfg80211_lock();
64 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
65 if (rdev
->wiphy_idx
== wiphy_idx
) {
74 int get_wiphy_idx(struct wiphy
*wiphy
)
76 struct cfg80211_registered_device
*rdev
;
78 return WIPHY_IDX_STALE
;
79 rdev
= wiphy_to_dev(wiphy
);
80 return rdev
->wiphy_idx
;
83 /* requires cfg80211_rdev_mutex to be held! */
84 struct wiphy
*wiphy_idx_to_wiphy(int wiphy_idx
)
86 struct cfg80211_registered_device
*rdev
;
88 if (!wiphy_idx_valid(wiphy_idx
))
91 assert_cfg80211_lock();
93 rdev
= cfg80211_rdev_by_wiphy_idx(wiphy_idx
);
99 struct cfg80211_registered_device
*
100 cfg80211_get_dev_from_ifindex(struct net
*net
, int ifindex
)
102 struct cfg80211_registered_device
*rdev
= ERR_PTR(-ENODEV
);
103 struct net_device
*dev
;
105 mutex_lock(&cfg80211_mutex
);
106 dev
= dev_get_by_index(net
, ifindex
);
109 if (dev
->ieee80211_ptr
) {
110 rdev
= wiphy_to_dev(dev
->ieee80211_ptr
->wiphy
);
111 mutex_lock(&rdev
->mtx
);
113 rdev
= ERR_PTR(-ENODEV
);
116 mutex_unlock(&cfg80211_mutex
);
120 /* requires cfg80211_mutex to be held */
121 int cfg80211_dev_rename(struct cfg80211_registered_device
*rdev
,
124 struct cfg80211_registered_device
*rdev2
;
125 int wiphy_idx
, taken
= -1, result
, digits
;
127 assert_cfg80211_lock();
129 /* prohibit calling the thing phy%d when %d is not its number */
130 sscanf(newname
, PHY_NAME
"%d%n", &wiphy_idx
, &taken
);
131 if (taken
== strlen(newname
) && wiphy_idx
!= rdev
->wiphy_idx
) {
132 /* count number of places needed to print wiphy_idx */
134 while (wiphy_idx
/= 10)
137 * deny the name if it is phy<idx> where <idx> is printed
138 * without leading zeroes. taken == strlen(newname) here
140 if (taken
== strlen(PHY_NAME
) + digits
)
145 /* Ignore nop renames */
146 if (strcmp(newname
, dev_name(&rdev
->wiphy
.dev
)) == 0)
149 /* Ensure another device does not already have this name. */
150 list_for_each_entry(rdev2
, &cfg80211_rdev_list
, list
)
151 if (strcmp(newname
, dev_name(&rdev2
->wiphy
.dev
)) == 0)
154 result
= device_rename(&rdev
->wiphy
.dev
, newname
);
158 if (rdev
->wiphy
.debugfsdir
&&
159 !debugfs_rename(rdev
->wiphy
.debugfsdir
->d_parent
,
160 rdev
->wiphy
.debugfsdir
,
161 rdev
->wiphy
.debugfsdir
->d_parent
,
163 pr_err("failed to rename debugfs dir to %s!\n", newname
);
165 nl80211_notify_dev_rename(rdev
);
170 int cfg80211_switch_netns(struct cfg80211_registered_device
*rdev
,
173 struct wireless_dev
*wdev
;
176 if (!(rdev
->wiphy
.flags
& WIPHY_FLAG_NETNS_OK
))
179 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
182 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
183 err
= dev_change_net_namespace(wdev
->netdev
, net
, "wlan%d");
186 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
190 /* failed -- clean up to old netns */
191 net
= wiphy_net(&rdev
->wiphy
);
193 list_for_each_entry_continue_reverse(wdev
, &rdev
->wdev_list
,
197 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
198 err
= dev_change_net_namespace(wdev
->netdev
, net
,
201 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
207 wiphy_net_set(&rdev
->wiphy
, net
);
209 err
= device_rename(&rdev
->wiphy
.dev
, dev_name(&rdev
->wiphy
.dev
));
215 static void cfg80211_rfkill_poll(struct rfkill
*rfkill
, void *data
)
217 struct cfg80211_registered_device
*rdev
= data
;
219 rdev
->ops
->rfkill_poll(&rdev
->wiphy
);
222 static int cfg80211_rfkill_set_block(void *data
, bool blocked
)
224 struct cfg80211_registered_device
*rdev
= data
;
225 struct wireless_dev
*wdev
;
231 mutex_lock(&rdev
->devlist_mtx
);
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 if (!wdev
->p2p_started
)
243 rdev
->ops
->stop_p2p_device(&rdev
->wiphy
, wdev
);
244 wdev
->p2p_started
= false;
252 mutex_unlock(&rdev
->devlist_mtx
);
258 static void cfg80211_rfkill_sync_work(struct work_struct
*work
)
260 struct cfg80211_registered_device
*rdev
;
262 rdev
= container_of(work
, struct cfg80211_registered_device
, rfkill_sync
);
263 cfg80211_rfkill_set_block(rdev
, rfkill_blocked(rdev
->rfkill
));
266 static void cfg80211_event_work(struct work_struct
*work
)
268 struct cfg80211_registered_device
*rdev
;
270 rdev
= container_of(work
, struct cfg80211_registered_device
,
274 cfg80211_lock_rdev(rdev
);
276 cfg80211_process_rdev_events(rdev
);
277 cfg80211_unlock_rdev(rdev
);
281 /* exported functions */
283 struct wiphy
*wiphy_new(const struct cfg80211_ops
*ops
, int sizeof_priv
)
285 static int wiphy_counter
;
287 struct cfg80211_registered_device
*rdev
;
290 WARN_ON(ops
->add_key
&& (!ops
->del_key
|| !ops
->set_default_key
));
291 WARN_ON(ops
->auth
&& (!ops
->assoc
|| !ops
->deauth
|| !ops
->disassoc
));
292 WARN_ON(ops
->connect
&& !ops
->disconnect
);
293 WARN_ON(ops
->join_ibss
&& !ops
->leave_ibss
);
294 WARN_ON(ops
->add_virtual_intf
&& !ops
->del_virtual_intf
);
295 WARN_ON(ops
->add_station
&& !ops
->del_station
);
296 WARN_ON(ops
->add_mpath
&& !ops
->del_mpath
);
297 WARN_ON(ops
->join_mesh
&& !ops
->leave_mesh
);
299 alloc_size
= sizeof(*rdev
) + sizeof_priv
;
301 rdev
= kzalloc(alloc_size
, GFP_KERNEL
);
307 mutex_lock(&cfg80211_mutex
);
309 rdev
->wiphy_idx
= wiphy_counter
++;
311 if (unlikely(!wiphy_idx_valid(rdev
->wiphy_idx
))) {
313 mutex_unlock(&cfg80211_mutex
);
319 mutex_unlock(&cfg80211_mutex
);
321 /* give it a proper name */
322 dev_set_name(&rdev
->wiphy
.dev
, PHY_NAME
"%d", rdev
->wiphy_idx
);
324 mutex_init(&rdev
->mtx
);
325 mutex_init(&rdev
->devlist_mtx
);
326 mutex_init(&rdev
->sched_scan_mtx
);
327 INIT_LIST_HEAD(&rdev
->wdev_list
);
328 spin_lock_init(&rdev
->bss_lock
);
329 INIT_LIST_HEAD(&rdev
->bss_list
);
330 INIT_WORK(&rdev
->scan_done_wk
, __cfg80211_scan_done
);
331 INIT_WORK(&rdev
->sched_scan_results_wk
, __cfg80211_sched_scan_results
);
332 #ifdef CONFIG_CFG80211_WEXT
333 rdev
->wiphy
.wext
= &cfg80211_wext_handler
;
336 device_initialize(&rdev
->wiphy
.dev
);
337 rdev
->wiphy
.dev
.class = &ieee80211_class
;
338 rdev
->wiphy
.dev
.platform_data
= rdev
;
340 #ifdef CONFIG_CFG80211_DEFAULT_PS
341 rdev
->wiphy
.flags
|= WIPHY_FLAG_PS_ON_BY_DEFAULT
;
344 wiphy_net_set(&rdev
->wiphy
, &init_net
);
346 rdev
->rfkill_ops
.set_block
= cfg80211_rfkill_set_block
;
347 rdev
->rfkill
= rfkill_alloc(dev_name(&rdev
->wiphy
.dev
),
348 &rdev
->wiphy
.dev
, RFKILL_TYPE_WLAN
,
349 &rdev
->rfkill_ops
, rdev
);
356 INIT_WORK(&rdev
->rfkill_sync
, cfg80211_rfkill_sync_work
);
357 INIT_WORK(&rdev
->conn_work
, cfg80211_conn_work
);
358 INIT_WORK(&rdev
->event_work
, cfg80211_event_work
);
360 init_waitqueue_head(&rdev
->dev_wait
);
363 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
364 * Fragmentation and RTS threshold are disabled by default with the
367 rdev
->wiphy
.retry_short
= 7;
368 rdev
->wiphy
.retry_long
= 4;
369 rdev
->wiphy
.frag_threshold
= (u32
) -1;
370 rdev
->wiphy
.rts_threshold
= (u32
) -1;
371 rdev
->wiphy
.coverage_class
= 0;
375 EXPORT_SYMBOL(wiphy_new
);
377 static int wiphy_verify_combinations(struct wiphy
*wiphy
)
379 const struct ieee80211_iface_combination
*c
;
382 for (i
= 0; i
< wiphy
->n_iface_combinations
; i
++) {
386 c
= &wiphy
->iface_combinations
[i
];
388 /* Combinations with just one interface aren't real */
389 if (WARN_ON(c
->max_interfaces
< 2))
392 /* Need at least one channel */
393 if (WARN_ON(!c
->num_different_channels
))
397 * Put a sane limit on maximum number of different
398 * channels to simplify channel accounting code.
400 if (WARN_ON(c
->num_different_channels
>
401 CFG80211_MAX_NUM_DIFFERENT_CHANNELS
))
404 if (WARN_ON(!c
->n_limits
))
407 for (j
= 0; j
< c
->n_limits
; j
++) {
408 u16 types
= c
->limits
[j
].types
;
411 * interface types shouldn't overlap, this is
412 * used in cfg80211_can_change_interface()
414 if (WARN_ON(types
& all_iftypes
))
416 all_iftypes
|= types
;
418 if (WARN_ON(!c
->limits
[j
].max
))
421 /* Shouldn't list software iftypes in combinations! */
422 if (WARN_ON(wiphy
->software_iftypes
& types
))
425 /* Only a single P2P_DEVICE can be allowed */
426 if (WARN_ON(types
& BIT(NL80211_IFTYPE_P2P_DEVICE
) &&
427 c
->limits
[j
].max
> 1))
430 cnt
+= c
->limits
[j
].max
;
432 * Don't advertise an unsupported type
435 if (WARN_ON((wiphy
->interface_modes
& types
) != types
))
439 /* You can't even choose that many! */
440 if (WARN_ON(cnt
< c
->max_interfaces
))
447 int wiphy_register(struct wiphy
*wiphy
)
449 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
451 enum ieee80211_band band
;
452 struct ieee80211_supported_band
*sband
;
453 bool have_band
= false;
455 u16 ifmodes
= wiphy
->interface_modes
;
458 if (WARN_ON((wiphy
->wowlan
.flags
& WIPHY_WOWLAN_GTK_REKEY_FAILURE
) &&
459 !(wiphy
->wowlan
.flags
& WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
)))
463 if (WARN_ON(wiphy
->ap_sme_capa
&&
464 !(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
)))
467 if (WARN_ON(wiphy
->addresses
&& !wiphy
->n_addresses
))
470 if (WARN_ON(wiphy
->addresses
&&
471 !is_zero_ether_addr(wiphy
->perm_addr
) &&
472 memcmp(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
,
476 if (wiphy
->addresses
)
477 memcpy(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
, ETH_ALEN
);
479 /* sanity check ifmodes */
481 ifmodes
&= ((1 << NUM_NL80211_IFTYPES
) - 1) & ~1;
482 if (WARN_ON(ifmodes
!= wiphy
->interface_modes
))
483 wiphy
->interface_modes
= ifmodes
;
485 res
= wiphy_verify_combinations(wiphy
);
489 /* sanity check supported bands/channels */
490 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
491 sband
= wiphy
->bands
[band
];
496 if (WARN_ON(!sband
->n_channels
))
499 * on 60gHz band, there are no legacy rates, so
502 if (WARN_ON(band
!= IEEE80211_BAND_60GHZ
&&
507 * Since cfg80211_disable_40mhz_24ghz is global, we can
508 * modify the sband's ht data even if the driver uses a
509 * global structure for that.
511 if (cfg80211_disable_40mhz_24ghz
&&
512 band
== IEEE80211_BAND_2GHZ
&&
513 sband
->ht_cap
.ht_supported
) {
514 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
515 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SGI_40
;
519 * Since we use a u32 for rate bitmaps in
520 * ieee80211_get_response_rate, we cannot
521 * have more than 32 legacy rates.
523 if (WARN_ON(sband
->n_bitrates
> 32))
526 for (i
= 0; i
< sband
->n_channels
; i
++) {
527 sband
->channels
[i
].orig_flags
=
528 sband
->channels
[i
].flags
;
529 sband
->channels
[i
].orig_mag
=
530 sband
->channels
[i
].max_antenna_gain
;
531 sband
->channels
[i
].orig_mpwr
=
532 sband
->channels
[i
].max_power
;
533 sband
->channels
[i
].band
= band
;
545 if (rdev
->wiphy
.wowlan
.n_patterns
) {
546 if (WARN_ON(!rdev
->wiphy
.wowlan
.pattern_min_len
||
547 rdev
->wiphy
.wowlan
.pattern_min_len
>
548 rdev
->wiphy
.wowlan
.pattern_max_len
))
553 /* check and set up bitrates */
554 ieee80211_set_bitrate_flags(wiphy
);
556 mutex_lock(&cfg80211_mutex
);
558 res
= device_add(&rdev
->wiphy
.dev
);
560 mutex_unlock(&cfg80211_mutex
);
564 /* set up regulatory info */
565 wiphy_regulatory_register(wiphy
);
567 list_add_rcu(&rdev
->list
, &cfg80211_rdev_list
);
568 cfg80211_rdev_list_generation
++;
571 rdev
->wiphy
.debugfsdir
=
572 debugfs_create_dir(wiphy_name(&rdev
->wiphy
),
573 ieee80211_debugfs_dir
);
574 if (IS_ERR(rdev
->wiphy
.debugfsdir
))
575 rdev
->wiphy
.debugfsdir
= NULL
;
577 if (wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
578 struct regulatory_request request
;
580 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
581 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
582 request
.alpha2
[0] = '9';
583 request
.alpha2
[1] = '9';
585 nl80211_send_reg_change_event(&request
);
588 cfg80211_debugfs_rdev_add(rdev
);
589 mutex_unlock(&cfg80211_mutex
);
592 * due to a locking dependency this has to be outside of the
593 * cfg80211_mutex lock
595 res
= rfkill_register(rdev
->rfkill
);
600 rdev
->wiphy
.registered
= true;
605 device_del(&rdev
->wiphy
.dev
);
608 EXPORT_SYMBOL(wiphy_register
);
610 void wiphy_rfkill_start_polling(struct wiphy
*wiphy
)
612 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
614 if (!rdev
->ops
->rfkill_poll
)
616 rdev
->rfkill_ops
.poll
= cfg80211_rfkill_poll
;
617 rfkill_resume_polling(rdev
->rfkill
);
619 EXPORT_SYMBOL(wiphy_rfkill_start_polling
);
621 void wiphy_rfkill_stop_polling(struct wiphy
*wiphy
)
623 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
625 rfkill_pause_polling(rdev
->rfkill
);
627 EXPORT_SYMBOL(wiphy_rfkill_stop_polling
);
629 void wiphy_unregister(struct wiphy
*wiphy
)
631 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
634 rdev
->wiphy
.registered
= false;
637 rfkill_unregister(rdev
->rfkill
);
639 /* protect the device list */
640 mutex_lock(&cfg80211_mutex
);
642 wait_event(rdev
->dev_wait
, ({
644 mutex_lock(&rdev
->devlist_mtx
);
645 __count
= rdev
->opencount
;
646 mutex_unlock(&rdev
->devlist_mtx
);
649 mutex_lock(&rdev
->devlist_mtx
);
650 BUG_ON(!list_empty(&rdev
->wdev_list
));
651 mutex_unlock(&rdev
->devlist_mtx
);
654 * First remove the hardware from everywhere, this makes
655 * it impossible to find from userspace.
657 debugfs_remove_recursive(rdev
->wiphy
.debugfsdir
);
658 list_del_rcu(&rdev
->list
);
662 * Try to grab rdev->mtx. If a command is still in progress,
663 * hopefully the driver will refuse it since it's tearing
664 * down the device already. We wait for this command to complete
665 * before unlinking the item from the list.
666 * Note: as codified by the BUG_ON above we cannot get here if
667 * a virtual interface is still present. Hence, we can only get
668 * to lock contention here if userspace issues a command that
669 * identified the hardware by wiphy index.
671 cfg80211_lock_rdev(rdev
);
673 cfg80211_unlock_rdev(rdev
);
676 * If this device got a regulatory hint tell core its
677 * free to listen now to a new shiny device regulatory hint
679 wiphy_regulatory_deregister(wiphy
);
681 cfg80211_rdev_list_generation
++;
682 device_del(&rdev
->wiphy
.dev
);
684 mutex_unlock(&cfg80211_mutex
);
686 flush_work(&rdev
->scan_done_wk
);
687 cancel_work_sync(&rdev
->conn_work
);
688 flush_work(&rdev
->event_work
);
690 if (rdev
->wowlan
&& rdev
->ops
->set_wakeup
)
691 rdev
->ops
->set_wakeup(&rdev
->wiphy
, false);
692 cfg80211_rdev_free_wowlan(rdev
);
694 EXPORT_SYMBOL(wiphy_unregister
);
696 void cfg80211_dev_free(struct cfg80211_registered_device
*rdev
)
698 struct cfg80211_internal_bss
*scan
, *tmp
;
699 rfkill_destroy(rdev
->rfkill
);
700 mutex_destroy(&rdev
->mtx
);
701 mutex_destroy(&rdev
->devlist_mtx
);
702 mutex_destroy(&rdev
->sched_scan_mtx
);
703 list_for_each_entry_safe(scan
, tmp
, &rdev
->bss_list
, list
)
704 cfg80211_put_bss(&scan
->pub
);
708 void wiphy_free(struct wiphy
*wiphy
)
710 put_device(&wiphy
->dev
);
712 EXPORT_SYMBOL(wiphy_free
);
714 void wiphy_rfkill_set_hw_state(struct wiphy
*wiphy
, bool blocked
)
716 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
718 if (rfkill_set_hw_state(rdev
->rfkill
, blocked
))
719 schedule_work(&rdev
->rfkill_sync
);
721 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state
);
723 static void wdev_cleanup_work(struct work_struct
*work
)
725 struct wireless_dev
*wdev
;
726 struct cfg80211_registered_device
*rdev
;
728 wdev
= container_of(work
, struct wireless_dev
, cleanup_work
);
729 rdev
= wiphy_to_dev(wdev
->wiphy
);
731 cfg80211_lock_rdev(rdev
);
733 if (WARN_ON(rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
)) {
734 rdev
->scan_req
->aborted
= true;
735 ___cfg80211_scan_done(rdev
, true);
738 cfg80211_unlock_rdev(rdev
);
740 mutex_lock(&rdev
->sched_scan_mtx
);
742 if (WARN_ON(rdev
->sched_scan_req
&&
743 rdev
->sched_scan_req
->dev
== wdev
->netdev
)) {
744 __cfg80211_stop_sched_scan(rdev
, false);
747 mutex_unlock(&rdev
->sched_scan_mtx
);
749 mutex_lock(&rdev
->devlist_mtx
);
751 mutex_unlock(&rdev
->devlist_mtx
);
752 wake_up(&rdev
->dev_wait
);
754 dev_put(wdev
->netdev
);
757 void cfg80211_unregister_wdev(struct wireless_dev
*wdev
)
759 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
763 if (WARN_ON(wdev
->netdev
))
766 mutex_lock(&rdev
->devlist_mtx
);
767 list_del_rcu(&wdev
->list
);
768 rdev
->devlist_generation
++;
770 switch (wdev
->iftype
) {
771 case NL80211_IFTYPE_P2P_DEVICE
:
772 if (!wdev
->p2p_started
)
774 rdev
->ops
->stop_p2p_device(&rdev
->wiphy
, wdev
);
775 wdev
->p2p_started
= false;
782 mutex_unlock(&rdev
->devlist_mtx
);
784 EXPORT_SYMBOL(cfg80211_unregister_wdev
);
786 static struct device_type wiphy_type
= {
790 void cfg80211_update_iface_num(struct cfg80211_registered_device
*rdev
,
791 enum nl80211_iftype iftype
, int num
)
795 rdev
->num_running_ifaces
+= num
;
796 if (iftype
== NL80211_IFTYPE_MONITOR
)
797 rdev
->num_running_monitor_ifaces
+= num
;
800 static int cfg80211_netdev_notifier_call(struct notifier_block
*nb
,
804 struct net_device
*dev
= ndev
;
805 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
806 struct cfg80211_registered_device
*rdev
;
812 rdev
= wiphy_to_dev(wdev
->wiphy
);
814 WARN_ON(wdev
->iftype
== NL80211_IFTYPE_UNSPECIFIED
);
817 case NETDEV_POST_INIT
:
818 SET_NETDEV_DEVTYPE(dev
, &wiphy_type
);
820 case NETDEV_REGISTER
:
822 * NB: cannot take rdev->mtx here because this may be
823 * called within code protected by it when interfaces
824 * are added with nl80211.
826 mutex_init(&wdev
->mtx
);
827 INIT_WORK(&wdev
->cleanup_work
, wdev_cleanup_work
);
828 INIT_LIST_HEAD(&wdev
->event_list
);
829 spin_lock_init(&wdev
->event_lock
);
830 INIT_LIST_HEAD(&wdev
->mgmt_registrations
);
831 spin_lock_init(&wdev
->mgmt_registrations_lock
);
833 mutex_lock(&rdev
->devlist_mtx
);
834 wdev
->identifier
= ++rdev
->wdev_id
;
835 list_add_rcu(&wdev
->list
, &rdev
->wdev_list
);
836 rdev
->devlist_generation
++;
837 /* can only change netns with wiphy */
838 dev
->features
|= NETIF_F_NETNS_LOCAL
;
840 if (sysfs_create_link(&dev
->dev
.kobj
, &rdev
->wiphy
.dev
.kobj
,
842 pr_err("failed to add phy80211 symlink to netdev!\n");
845 wdev
->sme_state
= CFG80211_SME_IDLE
;
846 mutex_unlock(&rdev
->devlist_mtx
);
847 #ifdef CONFIG_CFG80211_WEXT
848 wdev
->wext
.default_key
= -1;
849 wdev
->wext
.default_mgmt_key
= -1;
850 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
853 if (wdev
->wiphy
->flags
& WIPHY_FLAG_PS_ON_BY_DEFAULT
)
857 /* allow mac80211 to determine the timeout */
858 wdev
->ps_timeout
= -1;
860 if (!dev
->ethtool_ops
)
861 dev
->ethtool_ops
= &cfg80211_ethtool_ops
;
863 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
864 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
||
865 wdev
->iftype
== NL80211_IFTYPE_ADHOC
) && !wdev
->use_4addr
)
866 dev
->priv_flags
|= IFF_DONT_BRIDGE
;
868 case NETDEV_GOING_DOWN
:
869 switch (wdev
->iftype
) {
870 case NL80211_IFTYPE_ADHOC
:
871 cfg80211_leave_ibss(rdev
, dev
, true);
873 case NL80211_IFTYPE_P2P_CLIENT
:
874 case NL80211_IFTYPE_STATION
:
875 mutex_lock(&rdev
->sched_scan_mtx
);
876 __cfg80211_stop_sched_scan(rdev
, false);
877 mutex_unlock(&rdev
->sched_scan_mtx
);
880 #ifdef CONFIG_CFG80211_WEXT
881 kfree(wdev
->wext
.ie
);
882 wdev
->wext
.ie
= NULL
;
883 wdev
->wext
.ie_len
= 0;
884 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
886 __cfg80211_disconnect(rdev
, dev
,
887 WLAN_REASON_DEAUTH_LEAVING
, true);
888 cfg80211_mlme_down(rdev
, dev
);
891 case NL80211_IFTYPE_MESH_POINT
:
892 cfg80211_leave_mesh(rdev
, dev
);
894 case NL80211_IFTYPE_AP
:
895 cfg80211_stop_ap(rdev
, dev
);
900 wdev
->beacon_interval
= 0;
903 cfg80211_update_iface_num(rdev
, wdev
->iftype
, -1);
905 queue_work(cfg80211_wq
, &wdev
->cleanup_work
);
909 * If we have a really quick DOWN/UP succession we may
910 * have this work still pending ... cancel it and see
911 * if it was pending, in which case we need to account
912 * for some of the work it would have done.
914 if (cancel_work_sync(&wdev
->cleanup_work
)) {
915 mutex_lock(&rdev
->devlist_mtx
);
917 mutex_unlock(&rdev
->devlist_mtx
);
920 cfg80211_update_iface_num(rdev
, wdev
->iftype
, 1);
921 cfg80211_lock_rdev(rdev
);
922 mutex_lock(&rdev
->devlist_mtx
);
924 switch (wdev
->iftype
) {
925 #ifdef CONFIG_CFG80211_WEXT
926 case NL80211_IFTYPE_ADHOC
:
927 cfg80211_ibss_wext_join(rdev
, wdev
);
929 case NL80211_IFTYPE_STATION
:
930 cfg80211_mgd_wext_connect(rdev
, wdev
);
933 #ifdef CONFIG_MAC80211_MESH
934 case NL80211_IFTYPE_MESH_POINT
:
936 /* backward compat code... */
937 struct mesh_setup setup
;
938 memcpy(&setup
, &default_mesh_setup
,
940 /* back compat only needed for mesh_id */
941 setup
.mesh_id
= wdev
->ssid
;
942 setup
.mesh_id_len
= wdev
->mesh_id_up_len
;
943 if (wdev
->mesh_id_up_len
)
944 __cfg80211_join_mesh(rdev
, dev
,
946 &default_mesh_config
);
955 mutex_unlock(&rdev
->devlist_mtx
);
956 cfg80211_unlock_rdev(rdev
);
959 * Configure power management to the driver here so that its
960 * correctly set also after interface type changes etc.
962 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
963 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
) &&
964 rdev
->ops
->set_power_mgmt
)
965 if (rdev
->ops
->set_power_mgmt(wdev
->wiphy
, dev
,
968 /* assume this means it's off */
972 case NETDEV_UNREGISTER
:
974 * NB: cannot take rdev->mtx here because this may be
975 * called within code protected by it when interfaces
976 * are removed with nl80211.
978 mutex_lock(&rdev
->devlist_mtx
);
980 * It is possible to get NETDEV_UNREGISTER
981 * multiple times. To detect that, check
982 * that the interface is still on the list
983 * of registered interfaces, and only then
984 * remove and clean it up.
986 if (!list_empty(&wdev
->list
)) {
987 sysfs_remove_link(&dev
->dev
.kobj
, "phy80211");
988 list_del_rcu(&wdev
->list
);
989 rdev
->devlist_generation
++;
990 cfg80211_mlme_purge_registrations(wdev
);
991 #ifdef CONFIG_CFG80211_WEXT
992 kfree(wdev
->wext
.keys
);
995 mutex_unlock(&rdev
->devlist_mtx
);
997 * synchronise (so that we won't find this netdev
998 * from other code any more) and then clear the list
999 * head so that the above code can safely check for
1000 * !list_empty() to avoid double-cleanup.
1003 INIT_LIST_HEAD(&wdev
->list
);
1005 * Ensure that all events have been processed and
1008 cfg80211_process_wdev_events(wdev
);
1011 if (!(wdev
->wiphy
->interface_modes
& BIT(wdev
->iftype
)))
1012 return notifier_from_errno(-EOPNOTSUPP
);
1013 if (rfkill_blocked(rdev
->rfkill
))
1014 return notifier_from_errno(-ERFKILL
);
1015 mutex_lock(&rdev
->devlist_mtx
);
1016 ret
= cfg80211_can_add_interface(rdev
, wdev
->iftype
);
1017 mutex_unlock(&rdev
->devlist_mtx
);
1019 return notifier_from_errno(ret
);
1026 static struct notifier_block cfg80211_netdev_notifier
= {
1027 .notifier_call
= cfg80211_netdev_notifier_call
,
1030 static void __net_exit
cfg80211_pernet_exit(struct net
*net
)
1032 struct cfg80211_registered_device
*rdev
;
1035 mutex_lock(&cfg80211_mutex
);
1036 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1037 if (net_eq(wiphy_net(&rdev
->wiphy
), net
))
1038 WARN_ON(cfg80211_switch_netns(rdev
, &init_net
));
1040 mutex_unlock(&cfg80211_mutex
);
1044 static struct pernet_operations cfg80211_pernet_ops
= {
1045 .exit
= cfg80211_pernet_exit
,
1048 static int __init
cfg80211_init(void)
1052 err
= register_pernet_device(&cfg80211_pernet_ops
);
1054 goto out_fail_pernet
;
1056 err
= wiphy_sysfs_init();
1058 goto out_fail_sysfs
;
1060 err
= register_netdevice_notifier(&cfg80211_netdev_notifier
);
1062 goto out_fail_notifier
;
1064 err
= nl80211_init();
1066 goto out_fail_nl80211
;
1068 ieee80211_debugfs_dir
= debugfs_create_dir("ieee80211", NULL
);
1070 err
= regulatory_init();
1074 cfg80211_wq
= create_singlethread_workqueue("cfg80211");
1083 debugfs_remove(ieee80211_debugfs_dir
);
1085 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1089 unregister_pernet_device(&cfg80211_pernet_ops
);
1093 subsys_initcall(cfg80211_init
);
1095 static void __exit
cfg80211_exit(void)
1097 debugfs_remove(ieee80211_debugfs_dir
);
1099 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1102 unregister_pernet_device(&cfg80211_pernet_ops
);
1103 destroy_workqueue(cfg80211_wq
);
1105 module_exit(cfg80211_exit
);