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 = INT_MAX;
530 sband->channels[i].orig_mpwr =
531 sband->channels[i].max_power;
532 sband->channels[i].band = band;
544 if (rdev->wiphy.wowlan.n_patterns) {
545 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
546 rdev->wiphy.wowlan.pattern_min_len >
547 rdev->wiphy.wowlan.pattern_max_len))
552 /* check and set up bitrates */
553 ieee80211_set_bitrate_flags(wiphy);
555 mutex_lock(&cfg80211_mutex);
557 res = device_add(&rdev->wiphy.dev);
559 mutex_unlock(&cfg80211_mutex);
563 /* set up regulatory info */
564 wiphy_regulatory_register(wiphy);
566 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
567 cfg80211_rdev_list_generation++;
570 rdev->wiphy.debugfsdir =
571 debugfs_create_dir(wiphy_name(&rdev->wiphy),
572 ieee80211_debugfs_dir);
573 if (IS_ERR(rdev->wiphy.debugfsdir))
574 rdev->wiphy.debugfsdir = NULL;
576 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
577 struct regulatory_request request;
579 request.wiphy_idx = get_wiphy_idx(wiphy);
580 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
581 request.alpha2[0] = '9';
582 request.alpha2[1] = '9';
584 nl80211_send_reg_change_event(&request);
587 cfg80211_debugfs_rdev_add(rdev);
588 mutex_unlock(&cfg80211_mutex);
591 * due to a locking dependency this has to be outside of the
592 * cfg80211_mutex lock
594 res = rfkill_register(rdev->rfkill);
599 rdev->wiphy.registered = true;
604 device_del(&rdev->wiphy.dev);
607 EXPORT_SYMBOL(wiphy_register);
609 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
611 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
613 if (!rdev->ops->rfkill_poll)
615 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
616 rfkill_resume_polling(rdev->rfkill);
618 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
620 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
622 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
624 rfkill_pause_polling(rdev->rfkill);
626 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
628 void wiphy_unregister(struct wiphy *wiphy)
630 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
633 rdev->wiphy.registered = false;
636 rfkill_unregister(rdev->rfkill);
638 /* protect the device list */
639 mutex_lock(&cfg80211_mutex);
641 wait_event(rdev->dev_wait, ({
643 mutex_lock(&rdev->devlist_mtx);
644 __count = rdev->opencount;
645 mutex_unlock(&rdev->devlist_mtx);
648 mutex_lock(&rdev->devlist_mtx);
649 BUG_ON(!list_empty(&rdev->wdev_list));
650 mutex_unlock(&rdev->devlist_mtx);
653 * First remove the hardware from everywhere, this makes
654 * it impossible to find from userspace.
656 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
657 list_del_rcu(&rdev->list);
661 * Try to grab rdev->mtx. If a command is still in progress,
662 * hopefully the driver will refuse it since it's tearing
663 * down the device already. We wait for this command to complete
664 * before unlinking the item from the list.
665 * Note: as codified by the BUG_ON above we cannot get here if
666 * a virtual interface is still present. Hence, we can only get
667 * to lock contention here if userspace issues a command that
668 * identified the hardware by wiphy index.
670 cfg80211_lock_rdev(rdev);
672 cfg80211_unlock_rdev(rdev);
675 * If this device got a regulatory hint tell core its
676 * free to listen now to a new shiny device regulatory hint
678 wiphy_regulatory_deregister(wiphy);
680 cfg80211_rdev_list_generation++;
681 device_del(&rdev->wiphy.dev);
683 mutex_unlock(&cfg80211_mutex);
685 flush_work(&rdev->scan_done_wk);
686 cancel_work_sync(&rdev->conn_work);
687 flush_work(&rdev->event_work);
689 if (rdev->wowlan && rdev->ops->set_wakeup)
690 rdev->ops->set_wakeup(&rdev->wiphy, false);
691 cfg80211_rdev_free_wowlan(rdev);
693 EXPORT_SYMBOL(wiphy_unregister);
695 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
697 struct cfg80211_internal_bss *scan, *tmp;
698 rfkill_destroy(rdev->rfkill);
699 mutex_destroy(&rdev->mtx);
700 mutex_destroy(&rdev->devlist_mtx);
701 mutex_destroy(&rdev->sched_scan_mtx);
702 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
703 cfg80211_put_bss(&scan->pub);
707 void wiphy_free(struct wiphy *wiphy)
709 put_device(&wiphy->dev);
711 EXPORT_SYMBOL(wiphy_free);
713 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
715 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
717 if (rfkill_set_hw_state(rdev->rfkill, blocked))
718 schedule_work(&rdev->rfkill_sync);
720 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
722 static void wdev_cleanup_work(struct work_struct *work)
724 struct wireless_dev *wdev;
725 struct cfg80211_registered_device *rdev;
727 wdev = container_of(work, struct wireless_dev, cleanup_work);
728 rdev = wiphy_to_dev(wdev->wiphy);
730 cfg80211_lock_rdev(rdev);
732 if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
733 rdev->scan_req->aborted = true;
734 ___cfg80211_scan_done(rdev, true);
737 cfg80211_unlock_rdev(rdev);
739 mutex_lock(&rdev->sched_scan_mtx);
741 if (WARN_ON(rdev->sched_scan_req &&
742 rdev->sched_scan_req->dev == wdev->netdev)) {
743 __cfg80211_stop_sched_scan(rdev, false);
746 mutex_unlock(&rdev->sched_scan_mtx);
748 mutex_lock(&rdev->devlist_mtx);
750 mutex_unlock(&rdev->devlist_mtx);
751 wake_up(&rdev->dev_wait);
753 dev_put(wdev->netdev);
756 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
758 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
762 if (WARN_ON(wdev->netdev))
765 mutex_lock(&rdev->devlist_mtx);
766 list_del_rcu(&wdev->list);
767 rdev->devlist_generation++;
769 switch (wdev->iftype) {
770 case NL80211_IFTYPE_P2P_DEVICE:
771 if (!wdev->p2p_started)
773 rdev->ops->stop_p2p_device(&rdev->wiphy, wdev);
774 wdev->p2p_started = false;
781 mutex_unlock(&rdev->devlist_mtx);
783 EXPORT_SYMBOL(cfg80211_unregister_wdev);
785 static struct device_type wiphy_type = {
789 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
790 enum nl80211_iftype iftype, int num)
794 rdev->num_running_ifaces += num;
795 if (iftype == NL80211_IFTYPE_MONITOR)
796 rdev->num_running_monitor_ifaces += num;
799 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
803 struct net_device *dev = ndev;
804 struct wireless_dev *wdev = dev->ieee80211_ptr;
805 struct cfg80211_registered_device *rdev;
811 rdev = wiphy_to_dev(wdev->wiphy);
813 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
816 case NETDEV_POST_INIT:
817 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
819 case NETDEV_REGISTER:
821 * NB: cannot take rdev->mtx here because this may be
822 * called within code protected by it when interfaces
823 * are added with nl80211.
825 mutex_init(&wdev->mtx);
826 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
827 INIT_LIST_HEAD(&wdev->event_list);
828 spin_lock_init(&wdev->event_lock);
829 INIT_LIST_HEAD(&wdev->mgmt_registrations);
830 spin_lock_init(&wdev->mgmt_registrations_lock);
832 mutex_lock(&rdev->devlist_mtx);
833 wdev->identifier = ++rdev->wdev_id;
834 list_add_rcu(&wdev->list, &rdev->wdev_list);
835 rdev->devlist_generation++;
836 /* can only change netns with wiphy */
837 dev->features |= NETIF_F_NETNS_LOCAL;
839 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
841 pr_err("failed to add phy80211 symlink to netdev!\n");
844 wdev->sme_state = CFG80211_SME_IDLE;
845 mutex_unlock(&rdev->devlist_mtx);
846 #ifdef CONFIG_CFG80211_WEXT
847 wdev->wext.default_key = -1;
848 wdev->wext.default_mgmt_key = -1;
849 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
852 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
856 /* allow mac80211 to determine the timeout */
857 wdev->ps_timeout = -1;
859 if (!dev->ethtool_ops)
860 dev->ethtool_ops = &cfg80211_ethtool_ops;
862 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
863 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
864 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
865 dev->priv_flags |= IFF_DONT_BRIDGE;
867 case NETDEV_GOING_DOWN:
868 switch (wdev->iftype) {
869 case NL80211_IFTYPE_ADHOC:
870 cfg80211_leave_ibss(rdev, dev, true);
872 case NL80211_IFTYPE_P2P_CLIENT:
873 case NL80211_IFTYPE_STATION:
874 mutex_lock(&rdev->sched_scan_mtx);
875 __cfg80211_stop_sched_scan(rdev, false);
876 mutex_unlock(&rdev->sched_scan_mtx);
879 #ifdef CONFIG_CFG80211_WEXT
880 kfree(wdev->wext.ie);
881 wdev->wext.ie = NULL;
882 wdev->wext.ie_len = 0;
883 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
885 __cfg80211_disconnect(rdev, dev,
886 WLAN_REASON_DEAUTH_LEAVING, true);
887 cfg80211_mlme_down(rdev, dev);
890 case NL80211_IFTYPE_MESH_POINT:
891 cfg80211_leave_mesh(rdev, dev);
893 case NL80211_IFTYPE_AP:
894 cfg80211_stop_ap(rdev, dev);
899 wdev->beacon_interval = 0;
902 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
904 queue_work(cfg80211_wq, &wdev->cleanup_work);
908 * If we have a really quick DOWN/UP succession we may
909 * have this work still pending ... cancel it and see
910 * if it was pending, in which case we need to account
911 * for some of the work it would have done.
913 if (cancel_work_sync(&wdev->cleanup_work)) {
914 mutex_lock(&rdev->devlist_mtx);
916 mutex_unlock(&rdev->devlist_mtx);
919 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
920 cfg80211_lock_rdev(rdev);
921 mutex_lock(&rdev->devlist_mtx);
923 switch (wdev->iftype) {
924 #ifdef CONFIG_CFG80211_WEXT
925 case NL80211_IFTYPE_ADHOC:
926 cfg80211_ibss_wext_join(rdev, wdev);
928 case NL80211_IFTYPE_STATION:
929 cfg80211_mgd_wext_connect(rdev, wdev);
932 #ifdef CONFIG_MAC80211_MESH
933 case NL80211_IFTYPE_MESH_POINT:
935 /* backward compat code... */
936 struct mesh_setup setup;
937 memcpy(&setup, &default_mesh_setup,
939 /* back compat only needed for mesh_id */
940 setup.mesh_id = wdev->ssid;
941 setup.mesh_id_len = wdev->mesh_id_up_len;
942 if (wdev->mesh_id_up_len)
943 __cfg80211_join_mesh(rdev, dev,
945 &default_mesh_config);
954 mutex_unlock(&rdev->devlist_mtx);
955 cfg80211_unlock_rdev(rdev);
958 * Configure power management to the driver here so that its
959 * correctly set also after interface type changes etc.
961 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
962 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
963 rdev->ops->set_power_mgmt)
964 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
967 /* assume this means it's off */
971 case NETDEV_UNREGISTER:
973 * NB: cannot take rdev->mtx here because this may be
974 * called within code protected by it when interfaces
975 * are removed with nl80211.
977 mutex_lock(&rdev->devlist_mtx);
979 * It is possible to get NETDEV_UNREGISTER
980 * multiple times. To detect that, check
981 * that the interface is still on the list
982 * of registered interfaces, and only then
983 * remove and clean it up.
985 if (!list_empty(&wdev->list)) {
986 sysfs_remove_link(&dev->dev.kobj, "phy80211");
987 list_del_rcu(&wdev->list);
988 rdev->devlist_generation++;
989 cfg80211_mlme_purge_registrations(wdev);
990 #ifdef CONFIG_CFG80211_WEXT
991 kfree(wdev->wext.keys);
994 mutex_unlock(&rdev->devlist_mtx);
996 * synchronise (so that we won't find this netdev
997 * from other code any more) and then clear the list
998 * head so that the above code can safely check for
999 * !list_empty() to avoid double-cleanup.
1002 INIT_LIST_HEAD(&wdev->list);
1004 * Ensure that all events have been processed and
1007 cfg80211_process_wdev_events(wdev);
1010 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1011 return notifier_from_errno(-EOPNOTSUPP);
1012 if (rfkill_blocked(rdev->rfkill))
1013 return notifier_from_errno(-ERFKILL);
1014 mutex_lock(&rdev->devlist_mtx);
1015 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
1016 mutex_unlock(&rdev->devlist_mtx);
1018 return notifier_from_errno(ret);
1025 static struct notifier_block cfg80211_netdev_notifier = {
1026 .notifier_call = cfg80211_netdev_notifier_call,
1029 static void __net_exit cfg80211_pernet_exit(struct net *net)
1031 struct cfg80211_registered_device *rdev;
1034 mutex_lock(&cfg80211_mutex);
1035 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1036 if (net_eq(wiphy_net(&rdev->wiphy), net))
1037 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1039 mutex_unlock(&cfg80211_mutex);
1043 static struct pernet_operations cfg80211_pernet_ops = {
1044 .exit = cfg80211_pernet_exit,
1047 static int __init cfg80211_init(void)
1051 err = register_pernet_device(&cfg80211_pernet_ops);
1053 goto out_fail_pernet;
1055 err = wiphy_sysfs_init();
1057 goto out_fail_sysfs;
1059 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1061 goto out_fail_notifier;
1063 err = nl80211_init();
1065 goto out_fail_nl80211;
1067 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1069 err = regulatory_init();
1073 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1082 debugfs_remove(ieee80211_debugfs_dir);
1084 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1088 unregister_pernet_device(&cfg80211_pernet_ops);
1092 subsys_initcall(cfg80211_init);
1094 static void __exit cfg80211_exit(void)
1096 debugfs_remove(ieee80211_debugfs_dir);
1098 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1101 unregister_pernet_device(&cfg80211_pernet_ops);
1102 destroy_workqueue(cfg80211_wq);
1104 module_exit(cfg80211_exit);