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"
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");
38 /* RCU-protected (and cfg80211_mutex for writers) */
39 LIST_HEAD(cfg80211_rdev_list
);
40 int cfg80211_rdev_list_generation
;
42 DEFINE_MUTEX(cfg80211_mutex
);
45 static struct dentry
*ieee80211_debugfs_dir
;
47 /* for the cleanup, scan and event works */
48 struct workqueue_struct
*cfg80211_wq
;
50 static bool cfg80211_disable_40mhz_24ghz
;
51 module_param(cfg80211_disable_40mhz_24ghz
, bool, 0644);
52 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz
,
53 "Disable 40MHz support in the 2.4GHz band");
55 /* requires cfg80211_mutex to be held! */
56 struct cfg80211_registered_device
*cfg80211_rdev_by_wiphy_idx(int wiphy_idx
)
58 struct cfg80211_registered_device
*result
= NULL
, *rdev
;
60 assert_cfg80211_lock();
62 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
63 if (rdev
->wiphy_idx
== wiphy_idx
) {
72 int get_wiphy_idx(struct wiphy
*wiphy
)
74 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
76 return rdev
->wiphy_idx
;
79 /* requires cfg80211_rdev_mutex to be held! */
80 struct wiphy
*wiphy_idx_to_wiphy(int wiphy_idx
)
82 struct cfg80211_registered_device
*rdev
;
84 assert_cfg80211_lock();
86 rdev
= cfg80211_rdev_by_wiphy_idx(wiphy_idx
);
92 struct cfg80211_registered_device
*
93 cfg80211_get_dev_from_ifindex(struct net
*net
, int ifindex
)
95 struct cfg80211_registered_device
*rdev
= ERR_PTR(-ENODEV
);
96 struct net_device
*dev
;
98 mutex_lock(&cfg80211_mutex
);
99 dev
= dev_get_by_index(net
, ifindex
);
102 if (dev
->ieee80211_ptr
) {
103 rdev
= wiphy_to_dev(dev
->ieee80211_ptr
->wiphy
);
104 mutex_lock(&rdev
->mtx
);
106 rdev
= ERR_PTR(-ENODEV
);
109 mutex_unlock(&cfg80211_mutex
);
113 /* requires cfg80211_mutex to be held */
114 int cfg80211_dev_rename(struct cfg80211_registered_device
*rdev
,
117 struct cfg80211_registered_device
*rdev2
;
118 int wiphy_idx
, taken
= -1, result
, digits
;
120 assert_cfg80211_lock();
122 /* prohibit calling the thing phy%d when %d is not its number */
123 sscanf(newname
, PHY_NAME
"%d%n", &wiphy_idx
, &taken
);
124 if (taken
== strlen(newname
) && wiphy_idx
!= rdev
->wiphy_idx
) {
125 /* count number of places needed to print wiphy_idx */
127 while (wiphy_idx
/= 10)
130 * deny the name if it is phy<idx> where <idx> is printed
131 * without leading zeroes. taken == strlen(newname) here
133 if (taken
== strlen(PHY_NAME
) + digits
)
138 /* Ignore nop renames */
139 if (strcmp(newname
, dev_name(&rdev
->wiphy
.dev
)) == 0)
142 /* Ensure another device does not already have this name. */
143 list_for_each_entry(rdev2
, &cfg80211_rdev_list
, list
)
144 if (strcmp(newname
, dev_name(&rdev2
->wiphy
.dev
)) == 0)
147 result
= device_rename(&rdev
->wiphy
.dev
, newname
);
151 if (rdev
->wiphy
.debugfsdir
&&
152 !debugfs_rename(rdev
->wiphy
.debugfsdir
->d_parent
,
153 rdev
->wiphy
.debugfsdir
,
154 rdev
->wiphy
.debugfsdir
->d_parent
,
156 pr_err("failed to rename debugfs dir to %s!\n", newname
);
158 nl80211_notify_dev_rename(rdev
);
163 int cfg80211_switch_netns(struct cfg80211_registered_device
*rdev
,
166 struct wireless_dev
*wdev
;
169 if (!(rdev
->wiphy
.flags
& WIPHY_FLAG_NETNS_OK
))
172 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
175 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
176 err
= dev_change_net_namespace(wdev
->netdev
, net
, "wlan%d");
179 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
183 /* failed -- clean up to old netns */
184 net
= wiphy_net(&rdev
->wiphy
);
186 list_for_each_entry_continue_reverse(wdev
, &rdev
->wdev_list
,
190 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
191 err
= dev_change_net_namespace(wdev
->netdev
, net
,
194 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
200 wiphy_net_set(&rdev
->wiphy
, net
);
202 err
= device_rename(&rdev
->wiphy
.dev
, dev_name(&rdev
->wiphy
.dev
));
208 static void cfg80211_rfkill_poll(struct rfkill
*rfkill
, void *data
)
210 struct cfg80211_registered_device
*rdev
= data
;
212 rdev_rfkill_poll(rdev
);
215 static int cfg80211_rfkill_set_block(void *data
, bool blocked
)
217 struct cfg80211_registered_device
*rdev
= data
;
218 struct wireless_dev
*wdev
;
224 mutex_lock(&rdev
->devlist_mtx
);
226 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
228 dev_close(wdev
->netdev
);
231 /* otherwise, check iftype */
232 switch (wdev
->iftype
) {
233 case NL80211_IFTYPE_P2P_DEVICE
:
234 if (!wdev
->p2p_started
)
236 rdev_stop_p2p_device(rdev
, wdev
);
237 wdev
->p2p_started
= false;
245 mutex_unlock(&rdev
->devlist_mtx
);
251 static void cfg80211_rfkill_sync_work(struct work_struct
*work
)
253 struct cfg80211_registered_device
*rdev
;
255 rdev
= container_of(work
, struct cfg80211_registered_device
, rfkill_sync
);
256 cfg80211_rfkill_set_block(rdev
, rfkill_blocked(rdev
->rfkill
));
259 static void cfg80211_event_work(struct work_struct
*work
)
261 struct cfg80211_registered_device
*rdev
;
263 rdev
= container_of(work
, struct cfg80211_registered_device
,
267 cfg80211_lock_rdev(rdev
);
269 cfg80211_process_rdev_events(rdev
);
270 cfg80211_unlock_rdev(rdev
);
274 /* exported functions */
276 struct wiphy
*wiphy_new(const struct cfg80211_ops
*ops
, int sizeof_priv
)
278 static int wiphy_counter
;
280 struct cfg80211_registered_device
*rdev
;
283 WARN_ON(ops
->add_key
&& (!ops
->del_key
|| !ops
->set_default_key
));
284 WARN_ON(ops
->auth
&& (!ops
->assoc
|| !ops
->deauth
|| !ops
->disassoc
));
285 WARN_ON(ops
->connect
&& !ops
->disconnect
);
286 WARN_ON(ops
->join_ibss
&& !ops
->leave_ibss
);
287 WARN_ON(ops
->add_virtual_intf
&& !ops
->del_virtual_intf
);
288 WARN_ON(ops
->add_station
&& !ops
->del_station
);
289 WARN_ON(ops
->add_mpath
&& !ops
->del_mpath
);
290 WARN_ON(ops
->join_mesh
&& !ops
->leave_mesh
);
292 alloc_size
= sizeof(*rdev
) + sizeof_priv
;
294 rdev
= kzalloc(alloc_size
, GFP_KERNEL
);
300 mutex_lock(&cfg80211_mutex
);
302 rdev
->wiphy_idx
= wiphy_counter
++;
304 if (unlikely(rdev
->wiphy_idx
< 0)) {
306 mutex_unlock(&cfg80211_mutex
);
312 mutex_unlock(&cfg80211_mutex
);
314 /* give it a proper name */
315 dev_set_name(&rdev
->wiphy
.dev
, PHY_NAME
"%d", rdev
->wiphy_idx
);
317 mutex_init(&rdev
->mtx
);
318 mutex_init(&rdev
->devlist_mtx
);
319 mutex_init(&rdev
->sched_scan_mtx
);
320 INIT_LIST_HEAD(&rdev
->wdev_list
);
321 INIT_LIST_HEAD(&rdev
->beacon_registrations
);
322 spin_lock_init(&rdev
->beacon_registrations_lock
);
323 spin_lock_init(&rdev
->bss_lock
);
324 INIT_LIST_HEAD(&rdev
->bss_list
);
325 INIT_WORK(&rdev
->scan_done_wk
, __cfg80211_scan_done
);
326 INIT_WORK(&rdev
->sched_scan_results_wk
, __cfg80211_sched_scan_results
);
327 INIT_DELAYED_WORK(&rdev
->dfs_update_channels_wk
,
328 cfg80211_dfs_channels_update_work
);
329 #ifdef CONFIG_CFG80211_WEXT
330 rdev
->wiphy
.wext
= &cfg80211_wext_handler
;
333 device_initialize(&rdev
->wiphy
.dev
);
334 rdev
->wiphy
.dev
.class = &ieee80211_class
;
335 rdev
->wiphy
.dev
.platform_data
= rdev
;
337 #ifdef CONFIG_CFG80211_DEFAULT_PS
338 rdev
->wiphy
.flags
|= WIPHY_FLAG_PS_ON_BY_DEFAULT
;
341 wiphy_net_set(&rdev
->wiphy
, &init_net
);
343 rdev
->rfkill_ops
.set_block
= cfg80211_rfkill_set_block
;
344 rdev
->rfkill
= rfkill_alloc(dev_name(&rdev
->wiphy
.dev
),
345 &rdev
->wiphy
.dev
, RFKILL_TYPE_WLAN
,
346 &rdev
->rfkill_ops
, rdev
);
353 INIT_WORK(&rdev
->rfkill_sync
, cfg80211_rfkill_sync_work
);
354 INIT_WORK(&rdev
->conn_work
, cfg80211_conn_work
);
355 INIT_WORK(&rdev
->event_work
, cfg80211_event_work
);
357 init_waitqueue_head(&rdev
->dev_wait
);
360 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
361 * Fragmentation and RTS threshold are disabled by default with the
364 rdev
->wiphy
.retry_short
= 7;
365 rdev
->wiphy
.retry_long
= 4;
366 rdev
->wiphy
.frag_threshold
= (u32
) -1;
367 rdev
->wiphy
.rts_threshold
= (u32
) -1;
368 rdev
->wiphy
.coverage_class
= 0;
370 rdev
->wiphy
.features
= NL80211_FEATURE_SCAN_FLUSH
|
371 NL80211_FEATURE_ADVERTISE_CHAN_LIMITS
;
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
];
389 * Combinations with just one interface aren't real,
390 * however we make an exception for DFS.
392 if (WARN_ON((c
->max_interfaces
< 2) && !c
->radar_detect_widths
))
395 /* Need at least one channel */
396 if (WARN_ON(!c
->num_different_channels
))
400 * Put a sane limit on maximum number of different
401 * channels to simplify channel accounting code.
403 if (WARN_ON(c
->num_different_channels
>
404 CFG80211_MAX_NUM_DIFFERENT_CHANNELS
))
407 /* DFS only works on one channel. */
408 if (WARN_ON(c
->radar_detect_widths
&&
409 (c
->num_different_channels
> 1)))
412 if (WARN_ON(!c
->n_limits
))
415 for (j
= 0; j
< c
->n_limits
; j
++) {
416 u16 types
= c
->limits
[j
].types
;
419 * interface types shouldn't overlap, this is
420 * used in cfg80211_can_change_interface()
422 if (WARN_ON(types
& all_iftypes
))
424 all_iftypes
|= types
;
426 if (WARN_ON(!c
->limits
[j
].max
))
429 /* Shouldn't list software iftypes in combinations! */
430 if (WARN_ON(wiphy
->software_iftypes
& types
))
433 /* Only a single P2P_DEVICE can be allowed */
434 if (WARN_ON(types
& BIT(NL80211_IFTYPE_P2P_DEVICE
) &&
435 c
->limits
[j
].max
> 1))
438 cnt
+= c
->limits
[j
].max
;
440 * Don't advertise an unsupported type
443 if (WARN_ON((wiphy
->interface_modes
& types
) != types
))
447 /* You can't even choose that many! */
448 if (WARN_ON(cnt
< c
->max_interfaces
))
455 int wiphy_register(struct wiphy
*wiphy
)
457 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
459 enum ieee80211_band band
;
460 struct ieee80211_supported_band
*sband
;
461 bool have_band
= false;
463 u16 ifmodes
= wiphy
->interface_modes
;
466 if (WARN_ON((wiphy
->wowlan
.flags
& WIPHY_WOWLAN_GTK_REKEY_FAILURE
) &&
467 !(wiphy
->wowlan
.flags
& WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
)))
471 if (WARN_ON(wiphy
->ap_sme_capa
&&
472 !(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
)))
475 if (WARN_ON(wiphy
->addresses
&& !wiphy
->n_addresses
))
478 if (WARN_ON(wiphy
->addresses
&&
479 !is_zero_ether_addr(wiphy
->perm_addr
) &&
480 memcmp(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
,
484 if (WARN_ON(wiphy
->max_acl_mac_addrs
&&
485 (!(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
) ||
486 !rdev
->ops
->set_mac_acl
)))
489 if (wiphy
->addresses
)
490 memcpy(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
, ETH_ALEN
);
492 /* sanity check ifmodes */
494 ifmodes
&= ((1 << NUM_NL80211_IFTYPES
) - 1) & ~1;
495 if (WARN_ON(ifmodes
!= wiphy
->interface_modes
))
496 wiphy
->interface_modes
= ifmodes
;
498 res
= wiphy_verify_combinations(wiphy
);
502 /* sanity check supported bands/channels */
503 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
504 sband
= wiphy
->bands
[band
];
509 if (WARN_ON(!sband
->n_channels
))
512 * on 60gHz band, there are no legacy rates, so
515 if (WARN_ON(band
!= IEEE80211_BAND_60GHZ
&&
520 * Since cfg80211_disable_40mhz_24ghz is global, we can
521 * modify the sband's ht data even if the driver uses a
522 * global structure for that.
524 if (cfg80211_disable_40mhz_24ghz
&&
525 band
== IEEE80211_BAND_2GHZ
&&
526 sband
->ht_cap
.ht_supported
) {
527 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
528 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SGI_40
;
532 * Since we use a u32 for rate bitmaps in
533 * ieee80211_get_response_rate, we cannot
534 * have more than 32 legacy rates.
536 if (WARN_ON(sband
->n_bitrates
> 32))
539 for (i
= 0; i
< sband
->n_channels
; i
++) {
540 sband
->channels
[i
].orig_flags
=
541 sband
->channels
[i
].flags
;
542 sband
->channels
[i
].orig_mag
= INT_MAX
;
543 sband
->channels
[i
].orig_mpwr
=
544 sband
->channels
[i
].max_power
;
545 sband
->channels
[i
].band
= band
;
557 if (rdev
->wiphy
.wowlan
.n_patterns
) {
558 if (WARN_ON(!rdev
->wiphy
.wowlan
.pattern_min_len
||
559 rdev
->wiphy
.wowlan
.pattern_min_len
>
560 rdev
->wiphy
.wowlan
.pattern_max_len
))
565 /* check and set up bitrates */
566 ieee80211_set_bitrate_flags(wiphy
);
568 mutex_lock(&cfg80211_mutex
);
570 res
= device_add(&rdev
->wiphy
.dev
);
572 mutex_unlock(&cfg80211_mutex
);
576 /* set up regulatory info */
577 wiphy_regulatory_register(wiphy
);
579 list_add_rcu(&rdev
->list
, &cfg80211_rdev_list
);
580 cfg80211_rdev_list_generation
++;
583 rdev
->wiphy
.debugfsdir
=
584 debugfs_create_dir(wiphy_name(&rdev
->wiphy
),
585 ieee80211_debugfs_dir
);
586 if (IS_ERR(rdev
->wiphy
.debugfsdir
))
587 rdev
->wiphy
.debugfsdir
= NULL
;
589 if (wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
590 struct regulatory_request request
;
592 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
593 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
594 request
.alpha2
[0] = '9';
595 request
.alpha2
[1] = '9';
597 nl80211_send_reg_change_event(&request
);
600 cfg80211_debugfs_rdev_add(rdev
);
601 mutex_unlock(&cfg80211_mutex
);
604 * due to a locking dependency this has to be outside of the
605 * cfg80211_mutex lock
607 res
= rfkill_register(rdev
->rfkill
);
612 rdev
->wiphy
.registered
= true;
617 device_del(&rdev
->wiphy
.dev
);
620 EXPORT_SYMBOL(wiphy_register
);
622 void wiphy_rfkill_start_polling(struct wiphy
*wiphy
)
624 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
626 if (!rdev
->ops
->rfkill_poll
)
628 rdev
->rfkill_ops
.poll
= cfg80211_rfkill_poll
;
629 rfkill_resume_polling(rdev
->rfkill
);
631 EXPORT_SYMBOL(wiphy_rfkill_start_polling
);
633 void wiphy_rfkill_stop_polling(struct wiphy
*wiphy
)
635 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
637 rfkill_pause_polling(rdev
->rfkill
);
639 EXPORT_SYMBOL(wiphy_rfkill_stop_polling
);
641 void wiphy_unregister(struct wiphy
*wiphy
)
643 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
646 rdev
->wiphy
.registered
= false;
649 rfkill_unregister(rdev
->rfkill
);
651 /* protect the device list */
652 mutex_lock(&cfg80211_mutex
);
654 wait_event(rdev
->dev_wait
, ({
656 mutex_lock(&rdev
->devlist_mtx
);
657 __count
= rdev
->opencount
;
658 mutex_unlock(&rdev
->devlist_mtx
);
661 mutex_lock(&rdev
->devlist_mtx
);
662 BUG_ON(!list_empty(&rdev
->wdev_list
));
663 mutex_unlock(&rdev
->devlist_mtx
);
666 * First remove the hardware from everywhere, this makes
667 * it impossible to find from userspace.
669 debugfs_remove_recursive(rdev
->wiphy
.debugfsdir
);
670 list_del_rcu(&rdev
->list
);
674 * Try to grab rdev->mtx. If a command is still in progress,
675 * hopefully the driver will refuse it since it's tearing
676 * down the device already. We wait for this command to complete
677 * before unlinking the item from the list.
678 * Note: as codified by the BUG_ON above we cannot get here if
679 * a virtual interface is still present. Hence, we can only get
680 * to lock contention here if userspace issues a command that
681 * identified the hardware by wiphy index.
683 cfg80211_lock_rdev(rdev
);
685 cfg80211_unlock_rdev(rdev
);
688 * If this device got a regulatory hint tell core its
689 * free to listen now to a new shiny device regulatory hint
691 wiphy_regulatory_deregister(wiphy
);
693 cfg80211_rdev_list_generation
++;
694 device_del(&rdev
->wiphy
.dev
);
696 mutex_unlock(&cfg80211_mutex
);
698 flush_work(&rdev
->scan_done_wk
);
699 cancel_work_sync(&rdev
->conn_work
);
700 flush_work(&rdev
->event_work
);
701 cancel_delayed_work_sync(&rdev
->dfs_update_channels_wk
);
703 if (rdev
->wowlan
&& rdev
->ops
->set_wakeup
)
704 rdev_set_wakeup(rdev
, false);
705 cfg80211_rdev_free_wowlan(rdev
);
707 EXPORT_SYMBOL(wiphy_unregister
);
709 void cfg80211_dev_free(struct cfg80211_registered_device
*rdev
)
711 struct cfg80211_internal_bss
*scan
, *tmp
;
712 struct cfg80211_beacon_registration
*reg
, *treg
;
713 rfkill_destroy(rdev
->rfkill
);
714 mutex_destroy(&rdev
->mtx
);
715 mutex_destroy(&rdev
->devlist_mtx
);
716 mutex_destroy(&rdev
->sched_scan_mtx
);
717 list_for_each_entry_safe(reg
, treg
, &rdev
->beacon_registrations
, list
) {
718 list_del(®
->list
);
721 list_for_each_entry_safe(scan
, tmp
, &rdev
->bss_list
, list
)
722 cfg80211_put_bss(&rdev
->wiphy
, &scan
->pub
);
726 void wiphy_free(struct wiphy
*wiphy
)
728 put_device(&wiphy
->dev
);
730 EXPORT_SYMBOL(wiphy_free
);
732 void wiphy_rfkill_set_hw_state(struct wiphy
*wiphy
, bool blocked
)
734 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
736 if (rfkill_set_hw_state(rdev
->rfkill
, blocked
))
737 schedule_work(&rdev
->rfkill_sync
);
739 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state
);
741 static void wdev_cleanup_work(struct work_struct
*work
)
743 struct wireless_dev
*wdev
;
744 struct cfg80211_registered_device
*rdev
;
746 wdev
= container_of(work
, struct wireless_dev
, cleanup_work
);
747 rdev
= wiphy_to_dev(wdev
->wiphy
);
749 cfg80211_lock_rdev(rdev
);
751 if (WARN_ON(rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
)) {
752 rdev
->scan_req
->aborted
= true;
753 ___cfg80211_scan_done(rdev
, true);
756 cfg80211_unlock_rdev(rdev
);
758 mutex_lock(&rdev
->sched_scan_mtx
);
760 if (WARN_ON(rdev
->sched_scan_req
&&
761 rdev
->sched_scan_req
->dev
== wdev
->netdev
)) {
762 __cfg80211_stop_sched_scan(rdev
, false);
765 mutex_unlock(&rdev
->sched_scan_mtx
);
767 mutex_lock(&rdev
->devlist_mtx
);
769 mutex_unlock(&rdev
->devlist_mtx
);
770 wake_up(&rdev
->dev_wait
);
772 dev_put(wdev
->netdev
);
775 void cfg80211_unregister_wdev(struct wireless_dev
*wdev
)
777 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
781 if (WARN_ON(wdev
->netdev
))
784 mutex_lock(&rdev
->devlist_mtx
);
785 list_del_rcu(&wdev
->list
);
786 rdev
->devlist_generation
++;
788 switch (wdev
->iftype
) {
789 case NL80211_IFTYPE_P2P_DEVICE
:
790 if (!wdev
->p2p_started
)
792 rdev_stop_p2p_device(rdev
, wdev
);
793 wdev
->p2p_started
= false;
800 mutex_unlock(&rdev
->devlist_mtx
);
802 EXPORT_SYMBOL(cfg80211_unregister_wdev
);
804 static struct device_type wiphy_type
= {
808 void cfg80211_update_iface_num(struct cfg80211_registered_device
*rdev
,
809 enum nl80211_iftype iftype
, int num
)
813 rdev
->num_running_ifaces
+= num
;
814 if (iftype
== NL80211_IFTYPE_MONITOR
)
815 rdev
->num_running_monitor_ifaces
+= num
;
818 static int cfg80211_netdev_notifier_call(struct notifier_block
*nb
,
822 struct net_device
*dev
= ndev
;
823 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
824 struct cfg80211_registered_device
*rdev
;
830 rdev
= wiphy_to_dev(wdev
->wiphy
);
832 WARN_ON(wdev
->iftype
== NL80211_IFTYPE_UNSPECIFIED
);
835 case NETDEV_POST_INIT
:
836 SET_NETDEV_DEVTYPE(dev
, &wiphy_type
);
838 case NETDEV_REGISTER
:
840 * NB: cannot take rdev->mtx here because this may be
841 * called within code protected by it when interfaces
842 * are added with nl80211.
844 mutex_init(&wdev
->mtx
);
845 INIT_WORK(&wdev
->cleanup_work
, wdev_cleanup_work
);
846 INIT_LIST_HEAD(&wdev
->event_list
);
847 spin_lock_init(&wdev
->event_lock
);
848 INIT_LIST_HEAD(&wdev
->mgmt_registrations
);
849 spin_lock_init(&wdev
->mgmt_registrations_lock
);
851 mutex_lock(&rdev
->devlist_mtx
);
852 wdev
->identifier
= ++rdev
->wdev_id
;
853 list_add_rcu(&wdev
->list
, &rdev
->wdev_list
);
854 rdev
->devlist_generation
++;
855 /* can only change netns with wiphy */
856 dev
->features
|= NETIF_F_NETNS_LOCAL
;
858 if (sysfs_create_link(&dev
->dev
.kobj
, &rdev
->wiphy
.dev
.kobj
,
860 pr_err("failed to add phy80211 symlink to netdev!\n");
863 wdev
->sme_state
= CFG80211_SME_IDLE
;
864 mutex_unlock(&rdev
->devlist_mtx
);
865 #ifdef CONFIG_CFG80211_WEXT
866 wdev
->wext
.default_key
= -1;
867 wdev
->wext
.default_mgmt_key
= -1;
868 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
871 if (wdev
->wiphy
->flags
& WIPHY_FLAG_PS_ON_BY_DEFAULT
)
875 /* allow mac80211 to determine the timeout */
876 wdev
->ps_timeout
= -1;
878 netdev_set_default_ethtool_ops(dev
, &cfg80211_ethtool_ops
);
880 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
881 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
||
882 wdev
->iftype
== NL80211_IFTYPE_ADHOC
) && !wdev
->use_4addr
)
883 dev
->priv_flags
|= IFF_DONT_BRIDGE
;
885 case NETDEV_GOING_DOWN
:
886 switch (wdev
->iftype
) {
887 case NL80211_IFTYPE_ADHOC
:
888 cfg80211_leave_ibss(rdev
, dev
, true);
890 case NL80211_IFTYPE_P2P_CLIENT
:
891 case NL80211_IFTYPE_STATION
:
892 mutex_lock(&rdev
->sched_scan_mtx
);
893 __cfg80211_stop_sched_scan(rdev
, false);
894 mutex_unlock(&rdev
->sched_scan_mtx
);
897 #ifdef CONFIG_CFG80211_WEXT
898 kfree(wdev
->wext
.ie
);
899 wdev
->wext
.ie
= NULL
;
900 wdev
->wext
.ie_len
= 0;
901 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
903 __cfg80211_disconnect(rdev
, dev
,
904 WLAN_REASON_DEAUTH_LEAVING
, true);
905 cfg80211_mlme_down(rdev
, dev
);
908 case NL80211_IFTYPE_MESH_POINT
:
909 cfg80211_leave_mesh(rdev
, dev
);
911 case NL80211_IFTYPE_AP
:
912 cfg80211_stop_ap(rdev
, dev
);
917 wdev
->beacon_interval
= 0;
920 cfg80211_update_iface_num(rdev
, wdev
->iftype
, -1);
922 queue_work(cfg80211_wq
, &wdev
->cleanup_work
);
926 * If we have a really quick DOWN/UP succession we may
927 * have this work still pending ... cancel it and see
928 * if it was pending, in which case we need to account
929 * for some of the work it would have done.
931 if (cancel_work_sync(&wdev
->cleanup_work
)) {
932 mutex_lock(&rdev
->devlist_mtx
);
934 mutex_unlock(&rdev
->devlist_mtx
);
937 cfg80211_update_iface_num(rdev
, wdev
->iftype
, 1);
938 cfg80211_lock_rdev(rdev
);
939 mutex_lock(&rdev
->devlist_mtx
);
941 switch (wdev
->iftype
) {
942 #ifdef CONFIG_CFG80211_WEXT
943 case NL80211_IFTYPE_ADHOC
:
944 cfg80211_ibss_wext_join(rdev
, wdev
);
946 case NL80211_IFTYPE_STATION
:
947 cfg80211_mgd_wext_connect(rdev
, wdev
);
950 #ifdef CONFIG_MAC80211_MESH
951 case NL80211_IFTYPE_MESH_POINT
:
953 /* backward compat code... */
954 struct mesh_setup setup
;
955 memcpy(&setup
, &default_mesh_setup
,
957 /* back compat only needed for mesh_id */
958 setup
.mesh_id
= wdev
->ssid
;
959 setup
.mesh_id_len
= wdev
->mesh_id_up_len
;
960 if (wdev
->mesh_id_up_len
)
961 __cfg80211_join_mesh(rdev
, dev
,
963 &default_mesh_config
);
972 mutex_unlock(&rdev
->devlist_mtx
);
973 cfg80211_unlock_rdev(rdev
);
976 * Configure power management to the driver here so that its
977 * correctly set also after interface type changes etc.
979 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
980 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
) &&
981 rdev
->ops
->set_power_mgmt
)
982 if (rdev_set_power_mgmt(rdev
, dev
, wdev
->ps
,
984 /* assume this means it's off */
988 case NETDEV_UNREGISTER
:
990 * NB: cannot take rdev->mtx here because this may be
991 * called within code protected by it when interfaces
992 * are removed with nl80211.
994 mutex_lock(&rdev
->devlist_mtx
);
996 * It is possible to get NETDEV_UNREGISTER
997 * multiple times. To detect that, check
998 * that the interface is still on the list
999 * of registered interfaces, and only then
1000 * remove and clean it up.
1002 if (!list_empty(&wdev
->list
)) {
1003 sysfs_remove_link(&dev
->dev
.kobj
, "phy80211");
1004 list_del_rcu(&wdev
->list
);
1005 rdev
->devlist_generation
++;
1006 cfg80211_mlme_purge_registrations(wdev
);
1007 #ifdef CONFIG_CFG80211_WEXT
1008 kfree(wdev
->wext
.keys
);
1011 mutex_unlock(&rdev
->devlist_mtx
);
1013 * synchronise (so that we won't find this netdev
1014 * from other code any more) and then clear the list
1015 * head so that the above code can safely check for
1016 * !list_empty() to avoid double-cleanup.
1019 INIT_LIST_HEAD(&wdev
->list
);
1021 * Ensure that all events have been processed and
1024 cfg80211_process_wdev_events(wdev
);
1027 if (!(wdev
->wiphy
->interface_modes
& BIT(wdev
->iftype
)))
1028 return notifier_from_errno(-EOPNOTSUPP
);
1029 if (rfkill_blocked(rdev
->rfkill
))
1030 return notifier_from_errno(-ERFKILL
);
1031 mutex_lock(&rdev
->devlist_mtx
);
1032 ret
= cfg80211_can_add_interface(rdev
, wdev
->iftype
);
1033 mutex_unlock(&rdev
->devlist_mtx
);
1035 return notifier_from_errno(ret
);
1042 static struct notifier_block cfg80211_netdev_notifier
= {
1043 .notifier_call
= cfg80211_netdev_notifier_call
,
1046 static void __net_exit
cfg80211_pernet_exit(struct net
*net
)
1048 struct cfg80211_registered_device
*rdev
;
1051 mutex_lock(&cfg80211_mutex
);
1052 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1053 if (net_eq(wiphy_net(&rdev
->wiphy
), net
))
1054 WARN_ON(cfg80211_switch_netns(rdev
, &init_net
));
1056 mutex_unlock(&cfg80211_mutex
);
1060 static struct pernet_operations cfg80211_pernet_ops
= {
1061 .exit
= cfg80211_pernet_exit
,
1064 static int __init
cfg80211_init(void)
1068 err
= register_pernet_device(&cfg80211_pernet_ops
);
1070 goto out_fail_pernet
;
1072 err
= wiphy_sysfs_init();
1074 goto out_fail_sysfs
;
1076 err
= register_netdevice_notifier(&cfg80211_netdev_notifier
);
1078 goto out_fail_notifier
;
1080 err
= nl80211_init();
1082 goto out_fail_nl80211
;
1084 ieee80211_debugfs_dir
= debugfs_create_dir("ieee80211", NULL
);
1086 err
= regulatory_init();
1090 cfg80211_wq
= create_singlethread_workqueue("cfg80211");
1099 debugfs_remove(ieee80211_debugfs_dir
);
1101 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1105 unregister_pernet_device(&cfg80211_pernet_ops
);
1109 subsys_initcall(cfg80211_init
);
1111 static void __exit
cfg80211_exit(void)
1113 debugfs_remove(ieee80211_debugfs_dir
);
1115 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1118 unregister_pernet_device(&cfg80211_pernet_ops
);
1119 destroy_workqueue(cfg80211_wq
);
1121 module_exit(cfg80211_exit
);