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");
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_dev(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 int cfg80211_dev_rename(struct cfg80211_registered_device
*rdev
,
92 struct cfg80211_registered_device
*rdev2
;
93 int wiphy_idx
, taken
= -1, result
, 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
)
113 /* Ignore nop renames */
114 if (strcmp(newname
, dev_name(&rdev
->wiphy
.dev
)) == 0)
117 /* Ensure another device does not already have this name. */
118 list_for_each_entry(rdev2
, &cfg80211_rdev_list
, list
)
119 if (strcmp(newname
, dev_name(&rdev2
->wiphy
.dev
)) == 0)
122 result
= device_rename(&rdev
->wiphy
.dev
, newname
);
126 if (rdev
->wiphy
.debugfsdir
&&
127 !debugfs_rename(rdev
->wiphy
.debugfsdir
->d_parent
,
128 rdev
->wiphy
.debugfsdir
,
129 rdev
->wiphy
.debugfsdir
->d_parent
,
131 pr_err("failed to rename debugfs dir to %s!\n", newname
);
133 nl80211_notify_dev_rename(rdev
);
138 int cfg80211_switch_netns(struct cfg80211_registered_device
*rdev
,
141 struct wireless_dev
*wdev
;
144 if (!(rdev
->wiphy
.flags
& WIPHY_FLAG_NETNS_OK
))
147 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
150 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
151 err
= dev_change_net_namespace(wdev
->netdev
, net
, "wlan%d");
154 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
158 /* failed -- clean up to old netns */
159 net
= wiphy_net(&rdev
->wiphy
);
161 list_for_each_entry_continue_reverse(wdev
, &rdev
->wdev_list
,
165 wdev
->netdev
->features
&= ~NETIF_F_NETNS_LOCAL
;
166 err
= dev_change_net_namespace(wdev
->netdev
, net
,
169 wdev
->netdev
->features
|= NETIF_F_NETNS_LOCAL
;
175 wiphy_net_set(&rdev
->wiphy
, net
);
177 err
= device_rename(&rdev
->wiphy
.dev
, dev_name(&rdev
->wiphy
.dev
));
183 static void cfg80211_rfkill_poll(struct rfkill
*rfkill
, void *data
)
185 struct cfg80211_registered_device
*rdev
= data
;
187 rdev_rfkill_poll(rdev
);
190 void cfg80211_stop_p2p_device(struct cfg80211_registered_device
*rdev
,
191 struct wireless_dev
*wdev
)
195 if (WARN_ON(wdev
->iftype
!= NL80211_IFTYPE_P2P_DEVICE
))
198 if (!wdev
->p2p_started
)
201 rdev_stop_p2p_device(rdev
, wdev
);
202 wdev
->p2p_started
= false;
206 if (rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
) {
208 * If the scan request wasn't notified as done, set it
209 * to aborted and leak it after a warning. The driver
210 * should have notified us that it ended at the latest
211 * during rdev_stop_p2p_device().
213 if (WARN_ON(!rdev
->scan_req
->notified
))
214 rdev
->scan_req
->aborted
= true;
215 ___cfg80211_scan_done(rdev
, !rdev
->scan_req
->notified
);
219 static int cfg80211_rfkill_set_block(void *data
, bool blocked
)
221 struct cfg80211_registered_device
*rdev
= data
;
222 struct wireless_dev
*wdev
;
229 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
) {
231 dev_close(wdev
->netdev
);
234 /* otherwise, check iftype */
235 switch (wdev
->iftype
) {
236 case NL80211_IFTYPE_P2P_DEVICE
:
237 cfg80211_stop_p2p_device(rdev
, wdev
);
249 static void cfg80211_rfkill_sync_work(struct work_struct
*work
)
251 struct cfg80211_registered_device
*rdev
;
253 rdev
= container_of(work
, struct cfg80211_registered_device
, rfkill_sync
);
254 cfg80211_rfkill_set_block(rdev
, rfkill_blocked(rdev
->rfkill
));
257 static void cfg80211_event_work(struct work_struct
*work
)
259 struct cfg80211_registered_device
*rdev
;
261 rdev
= container_of(work
, struct cfg80211_registered_device
,
265 cfg80211_process_rdev_events(rdev
);
269 /* exported functions */
271 struct wiphy
*wiphy_new(const struct cfg80211_ops
*ops
, int sizeof_priv
)
273 static atomic_t wiphy_counter
= ATOMIC_INIT(0);
275 struct cfg80211_registered_device
*rdev
;
278 WARN_ON(ops
->add_key
&& (!ops
->del_key
|| !ops
->set_default_key
));
279 WARN_ON(ops
->auth
&& (!ops
->assoc
|| !ops
->deauth
|| !ops
->disassoc
));
280 WARN_ON(ops
->connect
&& !ops
->disconnect
);
281 WARN_ON(ops
->join_ibss
&& !ops
->leave_ibss
);
282 WARN_ON(ops
->add_virtual_intf
&& !ops
->del_virtual_intf
);
283 WARN_ON(ops
->add_station
&& !ops
->del_station
);
284 WARN_ON(ops
->add_mpath
&& !ops
->del_mpath
);
285 WARN_ON(ops
->join_mesh
&& !ops
->leave_mesh
);
287 alloc_size
= sizeof(*rdev
) + sizeof_priv
;
289 rdev
= kzalloc(alloc_size
, GFP_KERNEL
);
295 rdev
->wiphy_idx
= atomic_inc_return(&wiphy_counter
);
297 if (unlikely(rdev
->wiphy_idx
< 0)) {
299 atomic_dec(&wiphy_counter
);
304 /* give it a proper name */
305 dev_set_name(&rdev
->wiphy
.dev
, PHY_NAME
"%d", rdev
->wiphy_idx
);
307 INIT_LIST_HEAD(&rdev
->wdev_list
);
308 INIT_LIST_HEAD(&rdev
->beacon_registrations
);
309 spin_lock_init(&rdev
->beacon_registrations_lock
);
310 spin_lock_init(&rdev
->bss_lock
);
311 INIT_LIST_HEAD(&rdev
->bss_list
);
312 INIT_WORK(&rdev
->scan_done_wk
, __cfg80211_scan_done
);
313 INIT_WORK(&rdev
->sched_scan_results_wk
, __cfg80211_sched_scan_results
);
314 INIT_DELAYED_WORK(&rdev
->dfs_update_channels_wk
,
315 cfg80211_dfs_channels_update_work
);
316 #ifdef CONFIG_CFG80211_WEXT
317 rdev
->wiphy
.wext
= &cfg80211_wext_handler
;
320 device_initialize(&rdev
->wiphy
.dev
);
321 rdev
->wiphy
.dev
.class = &ieee80211_class
;
322 rdev
->wiphy
.dev
.platform_data
= rdev
;
324 #ifdef CONFIG_CFG80211_DEFAULT_PS
325 rdev
->wiphy
.flags
|= WIPHY_FLAG_PS_ON_BY_DEFAULT
;
328 wiphy_net_set(&rdev
->wiphy
, &init_net
);
330 rdev
->rfkill_ops
.set_block
= cfg80211_rfkill_set_block
;
331 rdev
->rfkill
= rfkill_alloc(dev_name(&rdev
->wiphy
.dev
),
332 &rdev
->wiphy
.dev
, RFKILL_TYPE_WLAN
,
333 &rdev
->rfkill_ops
, rdev
);
340 INIT_WORK(&rdev
->rfkill_sync
, cfg80211_rfkill_sync_work
);
341 INIT_WORK(&rdev
->conn_work
, cfg80211_conn_work
);
342 INIT_WORK(&rdev
->event_work
, cfg80211_event_work
);
344 init_waitqueue_head(&rdev
->dev_wait
);
347 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
348 * Fragmentation and RTS threshold are disabled by default with the
351 rdev
->wiphy
.retry_short
= 7;
352 rdev
->wiphy
.retry_long
= 4;
353 rdev
->wiphy
.frag_threshold
= (u32
) -1;
354 rdev
->wiphy
.rts_threshold
= (u32
) -1;
355 rdev
->wiphy
.coverage_class
= 0;
357 rdev
->wiphy
.features
= NL80211_FEATURE_SCAN_FLUSH
;
361 EXPORT_SYMBOL(wiphy_new
);
363 static int wiphy_verify_combinations(struct wiphy
*wiphy
)
365 const struct ieee80211_iface_combination
*c
;
368 for (i
= 0; i
< wiphy
->n_iface_combinations
; i
++) {
372 c
= &wiphy
->iface_combinations
[i
];
375 * Combinations with just one interface aren't real,
376 * however we make an exception for DFS.
378 if (WARN_ON((c
->max_interfaces
< 2) && !c
->radar_detect_widths
))
381 /* Need at least one channel */
382 if (WARN_ON(!c
->num_different_channels
))
386 * Put a sane limit on maximum number of different
387 * channels to simplify channel accounting code.
389 if (WARN_ON(c
->num_different_channels
>
390 CFG80211_MAX_NUM_DIFFERENT_CHANNELS
))
393 /* DFS only works on one channel. */
394 if (WARN_ON(c
->radar_detect_widths
&&
395 (c
->num_different_channels
> 1)))
398 if (WARN_ON(!c
->n_limits
))
401 for (j
= 0; j
< c
->n_limits
; j
++) {
402 u16 types
= c
->limits
[j
].types
;
405 * interface types shouldn't overlap, this is
406 * used in cfg80211_can_change_interface()
408 if (WARN_ON(types
& all_iftypes
))
410 all_iftypes
|= types
;
412 if (WARN_ON(!c
->limits
[j
].max
))
415 /* Shouldn't list software iftypes in combinations! */
416 if (WARN_ON(wiphy
->software_iftypes
& types
))
419 /* Only a single P2P_DEVICE can be allowed */
420 if (WARN_ON(types
& BIT(NL80211_IFTYPE_P2P_DEVICE
) &&
421 c
->limits
[j
].max
> 1))
424 cnt
+= c
->limits
[j
].max
;
426 * Don't advertise an unsupported type
429 if (WARN_ON((wiphy
->interface_modes
& types
) != types
))
433 /* You can't even choose that many! */
434 if (WARN_ON(cnt
< c
->max_interfaces
))
441 int wiphy_register(struct wiphy
*wiphy
)
443 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
445 enum ieee80211_band band
;
446 struct ieee80211_supported_band
*sband
;
447 bool have_band
= false;
449 u16 ifmodes
= wiphy
->interface_modes
;
452 if (WARN_ON((wiphy
->wowlan
.flags
& WIPHY_WOWLAN_GTK_REKEY_FAILURE
) &&
453 !(wiphy
->wowlan
.flags
& WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
)))
457 if (WARN_ON(wiphy
->ap_sme_capa
&&
458 !(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
)))
461 if (WARN_ON(wiphy
->addresses
&& !wiphy
->n_addresses
))
464 if (WARN_ON(wiphy
->addresses
&&
465 !is_zero_ether_addr(wiphy
->perm_addr
) &&
466 memcmp(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
,
470 if (WARN_ON(wiphy
->max_acl_mac_addrs
&&
471 (!(wiphy
->flags
& WIPHY_FLAG_HAVE_AP_SME
) ||
472 !rdev
->ops
->set_mac_acl
)))
475 if (wiphy
->addresses
)
476 memcpy(wiphy
->perm_addr
, wiphy
->addresses
[0].addr
, ETH_ALEN
);
478 /* sanity check ifmodes */
480 ifmodes
&= ((1 << NUM_NL80211_IFTYPES
) - 1) & ~1;
481 if (WARN_ON(ifmodes
!= wiphy
->interface_modes
))
482 wiphy
->interface_modes
= ifmodes
;
484 res
= wiphy_verify_combinations(wiphy
);
488 /* sanity check supported bands/channels */
489 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
490 sband
= wiphy
->bands
[band
];
495 if (WARN_ON(!sband
->n_channels
))
498 * on 60gHz band, there are no legacy rates, so
501 if (WARN_ON(band
!= IEEE80211_BAND_60GHZ
&&
506 * Since cfg80211_disable_40mhz_24ghz is global, we can
507 * modify the sband's ht data even if the driver uses a
508 * global structure for that.
510 if (cfg80211_disable_40mhz_24ghz
&&
511 band
== IEEE80211_BAND_2GHZ
&&
512 sband
->ht_cap
.ht_supported
) {
513 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
514 sband
->ht_cap
.cap
&= ~IEEE80211_HT_CAP_SGI_40
;
518 * Since we use a u32 for rate bitmaps in
519 * ieee80211_get_response_rate, we cannot
520 * have more than 32 legacy rates.
522 if (WARN_ON(sband
->n_bitrates
> 32))
525 for (i
= 0; i
< sband
->n_channels
; i
++) {
526 sband
->channels
[i
].orig_flags
=
527 sband
->channels
[i
].flags
;
528 sband
->channels
[i
].orig_mag
= INT_MAX
;
529 sband
->channels
[i
].orig_mpwr
=
530 sband
->channels
[i
].max_power
;
531 sband
->channels
[i
].band
= band
;
543 if (rdev
->wiphy
.wowlan
.n_patterns
) {
544 if (WARN_ON(!rdev
->wiphy
.wowlan
.pattern_min_len
||
545 rdev
->wiphy
.wowlan
.pattern_min_len
>
546 rdev
->wiphy
.wowlan
.pattern_max_len
))
551 /* check and set up bitrates */
552 ieee80211_set_bitrate_flags(wiphy
);
556 res
= device_add(&rdev
->wiphy
.dev
);
562 /* set up regulatory info */
563 wiphy_regulatory_register(wiphy
);
565 list_add_rcu(&rdev
->list
, &cfg80211_rdev_list
);
566 cfg80211_rdev_list_generation
++;
569 rdev
->wiphy
.debugfsdir
=
570 debugfs_create_dir(wiphy_name(&rdev
->wiphy
),
571 ieee80211_debugfs_dir
);
572 if (IS_ERR(rdev
->wiphy
.debugfsdir
))
573 rdev
->wiphy
.debugfsdir
= NULL
;
575 if (wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
576 struct regulatory_request request
;
578 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
579 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
580 request
.alpha2
[0] = '9';
581 request
.alpha2
[1] = '9';
583 nl80211_send_reg_change_event(&request
);
586 cfg80211_debugfs_rdev_add(rdev
);
588 res
= rfkill_register(rdev
->rfkill
);
590 device_del(&rdev
->wiphy
.dev
);
592 debugfs_remove_recursive(rdev
->wiphy
.debugfsdir
);
593 list_del_rcu(&rdev
->list
);
594 wiphy_regulatory_deregister(wiphy
);
599 rdev
->wiphy
.registered
= true;
603 EXPORT_SYMBOL(wiphy_register
);
605 void wiphy_rfkill_start_polling(struct wiphy
*wiphy
)
607 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
609 if (!rdev
->ops
->rfkill_poll
)
611 rdev
->rfkill_ops
.poll
= cfg80211_rfkill_poll
;
612 rfkill_resume_polling(rdev
->rfkill
);
614 EXPORT_SYMBOL(wiphy_rfkill_start_polling
);
616 void wiphy_rfkill_stop_polling(struct wiphy
*wiphy
)
618 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
620 rfkill_pause_polling(rdev
->rfkill
);
622 EXPORT_SYMBOL(wiphy_rfkill_stop_polling
);
624 void wiphy_unregister(struct wiphy
*wiphy
)
626 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
628 wait_event(rdev
->dev_wait
, ({
631 __count
= rdev
->opencount
;
636 rdev
->wiphy
.registered
= false;
638 rfkill_unregister(rdev
->rfkill
);
640 BUG_ON(!list_empty(&rdev
->wdev_list
));
643 * First remove the hardware from everywhere, this makes
644 * it impossible to find from userspace.
646 debugfs_remove_recursive(rdev
->wiphy
.debugfsdir
);
647 list_del_rcu(&rdev
->list
);
651 * If this device got a regulatory hint tell core its
652 * free to listen now to a new shiny device regulatory hint
654 wiphy_regulatory_deregister(wiphy
);
656 cfg80211_rdev_list_generation
++;
657 device_del(&rdev
->wiphy
.dev
);
661 flush_work(&rdev
->scan_done_wk
);
662 cancel_work_sync(&rdev
->conn_work
);
663 flush_work(&rdev
->event_work
);
664 cancel_delayed_work_sync(&rdev
->dfs_update_channels_wk
);
667 if (rdev
->wiphy
.wowlan_config
&& rdev
->ops
->set_wakeup
)
668 rdev_set_wakeup(rdev
, false);
670 cfg80211_rdev_free_wowlan(rdev
);
672 EXPORT_SYMBOL(wiphy_unregister
);
674 void cfg80211_dev_free(struct cfg80211_registered_device
*rdev
)
676 struct cfg80211_internal_bss
*scan
, *tmp
;
677 struct cfg80211_beacon_registration
*reg
, *treg
;
678 rfkill_destroy(rdev
->rfkill
);
679 list_for_each_entry_safe(reg
, treg
, &rdev
->beacon_registrations
, list
) {
680 list_del(®
->list
);
683 list_for_each_entry_safe(scan
, tmp
, &rdev
->bss_list
, list
)
684 cfg80211_put_bss(&rdev
->wiphy
, &scan
->pub
);
688 void wiphy_free(struct wiphy
*wiphy
)
690 put_device(&wiphy
->dev
);
692 EXPORT_SYMBOL(wiphy_free
);
694 void wiphy_rfkill_set_hw_state(struct wiphy
*wiphy
, bool blocked
)
696 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wiphy
);
698 if (rfkill_set_hw_state(rdev
->rfkill
, blocked
))
699 schedule_work(&rdev
->rfkill_sync
);
701 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state
);
703 void cfg80211_unregister_wdev(struct wireless_dev
*wdev
)
705 struct cfg80211_registered_device
*rdev
= wiphy_to_dev(wdev
->wiphy
);
709 if (WARN_ON(wdev
->netdev
))
712 list_del_rcu(&wdev
->list
);
713 rdev
->devlist_generation
++;
715 switch (wdev
->iftype
) {
716 case NL80211_IFTYPE_P2P_DEVICE
:
717 cfg80211_stop_p2p_device(rdev
, wdev
);
724 EXPORT_SYMBOL(cfg80211_unregister_wdev
);
726 static struct device_type wiphy_type
= {
730 void cfg80211_update_iface_num(struct cfg80211_registered_device
*rdev
,
731 enum nl80211_iftype iftype
, int num
)
735 rdev
->num_running_ifaces
+= num
;
736 if (iftype
== NL80211_IFTYPE_MONITOR
)
737 rdev
->num_running_monitor_ifaces
+= num
;
740 void cfg80211_leave(struct cfg80211_registered_device
*rdev
,
741 struct wireless_dev
*wdev
)
743 struct net_device
*dev
= wdev
->netdev
;
745 switch (wdev
->iftype
) {
746 case NL80211_IFTYPE_ADHOC
:
747 cfg80211_leave_ibss(rdev
, dev
, true);
749 case NL80211_IFTYPE_P2P_CLIENT
:
750 case NL80211_IFTYPE_STATION
:
751 __cfg80211_stop_sched_scan(rdev
, false);
754 #ifdef CONFIG_CFG80211_WEXT
755 kfree(wdev
->wext
.ie
);
756 wdev
->wext
.ie
= NULL
;
757 wdev
->wext
.ie_len
= 0;
758 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
760 cfg80211_disconnect(rdev
, dev
,
761 WLAN_REASON_DEAUTH_LEAVING
, true);
764 case NL80211_IFTYPE_MESH_POINT
:
765 cfg80211_leave_mesh(rdev
, dev
);
767 case NL80211_IFTYPE_AP
:
768 cfg80211_stop_ap(rdev
, dev
);
774 wdev
->beacon_interval
= 0;
777 static int cfg80211_netdev_notifier_call(struct notifier_block
*nb
,
778 unsigned long state
, void *ptr
)
780 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
781 struct wireless_dev
*wdev
= dev
->ieee80211_ptr
;
782 struct cfg80211_registered_device
*rdev
;
788 rdev
= wiphy_to_dev(wdev
->wiphy
);
790 WARN_ON(wdev
->iftype
== NL80211_IFTYPE_UNSPECIFIED
);
793 case NETDEV_POST_INIT
:
794 SET_NETDEV_DEVTYPE(dev
, &wiphy_type
);
796 case NETDEV_REGISTER
:
798 * NB: cannot take rdev->mtx here because this may be
799 * called within code protected by it when interfaces
800 * are added with nl80211.
802 mutex_init(&wdev
->mtx
);
803 INIT_LIST_HEAD(&wdev
->event_list
);
804 spin_lock_init(&wdev
->event_lock
);
805 INIT_LIST_HEAD(&wdev
->mgmt_registrations
);
806 spin_lock_init(&wdev
->mgmt_registrations_lock
);
808 wdev
->identifier
= ++rdev
->wdev_id
;
809 list_add_rcu(&wdev
->list
, &rdev
->wdev_list
);
810 rdev
->devlist_generation
++;
811 /* can only change netns with wiphy */
812 dev
->features
|= NETIF_F_NETNS_LOCAL
;
814 if (sysfs_create_link(&dev
->dev
.kobj
, &rdev
->wiphy
.dev
.kobj
,
816 pr_err("failed to add phy80211 symlink to netdev!\n");
819 wdev
->sme_state
= CFG80211_SME_IDLE
;
820 #ifdef CONFIG_CFG80211_WEXT
821 wdev
->wext
.default_key
= -1;
822 wdev
->wext
.default_mgmt_key
= -1;
823 wdev
->wext
.connect
.auth_type
= NL80211_AUTHTYPE_AUTOMATIC
;
826 if (wdev
->wiphy
->flags
& WIPHY_FLAG_PS_ON_BY_DEFAULT
)
830 /* allow mac80211 to determine the timeout */
831 wdev
->ps_timeout
= -1;
833 netdev_set_default_ethtool_ops(dev
, &cfg80211_ethtool_ops
);
835 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
836 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
||
837 wdev
->iftype
== NL80211_IFTYPE_ADHOC
) && !wdev
->use_4addr
)
838 dev
->priv_flags
|= IFF_DONT_BRIDGE
;
840 case NETDEV_GOING_DOWN
:
841 cfg80211_leave(rdev
, wdev
);
844 cfg80211_update_iface_num(rdev
, wdev
->iftype
, -1);
845 if (rdev
->scan_req
&& rdev
->scan_req
->wdev
== wdev
) {
846 if (WARN_ON(!rdev
->scan_req
->notified
))
847 rdev
->scan_req
->aborted
= true;
848 ___cfg80211_scan_done(rdev
, true);
851 if (WARN_ON(rdev
->sched_scan_req
&&
852 rdev
->sched_scan_req
->dev
== wdev
->netdev
)) {
853 __cfg80211_stop_sched_scan(rdev
, false);
857 wake_up(&rdev
->dev_wait
);
860 cfg80211_update_iface_num(rdev
, wdev
->iftype
, 1);
862 switch (wdev
->iftype
) {
863 #ifdef CONFIG_CFG80211_WEXT
864 case NL80211_IFTYPE_ADHOC
:
865 cfg80211_ibss_wext_join(rdev
, wdev
);
867 case NL80211_IFTYPE_STATION
:
868 cfg80211_mgd_wext_connect(rdev
, wdev
);
871 #ifdef CONFIG_MAC80211_MESH
872 case NL80211_IFTYPE_MESH_POINT
:
874 /* backward compat code... */
875 struct mesh_setup setup
;
876 memcpy(&setup
, &default_mesh_setup
,
878 /* back compat only needed for mesh_id */
879 setup
.mesh_id
= wdev
->ssid
;
880 setup
.mesh_id_len
= wdev
->mesh_id_up_len
;
881 if (wdev
->mesh_id_up_len
)
882 __cfg80211_join_mesh(rdev
, dev
,
884 &default_mesh_config
);
895 * Configure power management to the driver here so that its
896 * correctly set also after interface type changes etc.
898 if ((wdev
->iftype
== NL80211_IFTYPE_STATION
||
899 wdev
->iftype
== NL80211_IFTYPE_P2P_CLIENT
) &&
900 rdev
->ops
->set_power_mgmt
)
901 if (rdev_set_power_mgmt(rdev
, dev
, wdev
->ps
,
903 /* assume this means it's off */
907 case NETDEV_UNREGISTER
:
909 * It is possible to get NETDEV_UNREGISTER
910 * multiple times. To detect that, check
911 * that the interface is still on the list
912 * of registered interfaces, and only then
913 * remove and clean it up.
915 if (!list_empty(&wdev
->list
)) {
916 sysfs_remove_link(&dev
->dev
.kobj
, "phy80211");
917 list_del_rcu(&wdev
->list
);
918 rdev
->devlist_generation
++;
919 cfg80211_mlme_purge_registrations(wdev
);
920 #ifdef CONFIG_CFG80211_WEXT
921 kfree(wdev
->wext
.keys
);
925 * synchronise (so that we won't find this netdev
926 * from other code any more) and then clear the list
927 * head so that the above code can safely check for
928 * !list_empty() to avoid double-cleanup.
931 INIT_LIST_HEAD(&wdev
->list
);
933 * Ensure that all events have been processed and
936 cfg80211_process_wdev_events(wdev
);
939 if (!(wdev
->wiphy
->interface_modes
& BIT(wdev
->iftype
)))
940 return notifier_from_errno(-EOPNOTSUPP
);
941 if (rfkill_blocked(rdev
->rfkill
))
942 return notifier_from_errno(-ERFKILL
);
943 ret
= cfg80211_can_add_interface(rdev
, wdev
->iftype
);
945 return notifier_from_errno(ret
);
952 static struct notifier_block cfg80211_netdev_notifier
= {
953 .notifier_call
= cfg80211_netdev_notifier_call
,
956 static void __net_exit
cfg80211_pernet_exit(struct net
*net
)
958 struct cfg80211_registered_device
*rdev
;
961 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
962 if (net_eq(wiphy_net(&rdev
->wiphy
), net
))
963 WARN_ON(cfg80211_switch_netns(rdev
, &init_net
));
968 static struct pernet_operations cfg80211_pernet_ops
= {
969 .exit
= cfg80211_pernet_exit
,
972 static int __init
cfg80211_init(void)
976 err
= register_pernet_device(&cfg80211_pernet_ops
);
978 goto out_fail_pernet
;
980 err
= wiphy_sysfs_init();
984 err
= register_netdevice_notifier(&cfg80211_netdev_notifier
);
986 goto out_fail_notifier
;
988 err
= nl80211_init();
990 goto out_fail_nl80211
;
992 ieee80211_debugfs_dir
= debugfs_create_dir("ieee80211", NULL
);
994 err
= regulatory_init();
998 cfg80211_wq
= create_singlethread_workqueue("cfg80211");
1009 debugfs_remove(ieee80211_debugfs_dir
);
1011 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1015 unregister_pernet_device(&cfg80211_pernet_ops
);
1019 subsys_initcall(cfg80211_init
);
1021 static void __exit
cfg80211_exit(void)
1023 debugfs_remove(ieee80211_debugfs_dir
);
1025 unregister_netdevice_notifier(&cfg80211_netdev_notifier
);
1028 unregister_pernet_device(&cfg80211_pernet_ops
);
1029 destroy_workqueue(cfg80211_wq
);
1031 module_exit(cfg80211_exit
);