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");
36 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
38 /* RCU-protected (and RTNL for writers) */
39 LIST_HEAD(cfg80211_rdev_list);
40 int cfg80211_rdev_list_generation;
43 static struct dentry *ieee80211_debugfs_dir;
45 /* for the cleanup, scan and event works */
46 struct workqueue_struct *cfg80211_wq;
48 static bool cfg80211_disable_40mhz_24ghz;
49 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
50 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
51 "Disable 40MHz support in the 2.4GHz band");
53 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
55 struct cfg80211_registered_device *result = NULL, *rdev;
59 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
60 if (rdev->wiphy_idx == wiphy_idx) {
69 int get_wiphy_idx(struct wiphy *wiphy)
71 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
73 return rdev->wiphy_idx;
76 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78 struct cfg80211_registered_device *rdev;
82 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
88 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
91 struct cfg80211_registered_device *rdev2;
92 int wiphy_idx, taken = -1, result, digits;
96 /* prohibit calling the thing phy%d when %d is not its number */
97 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
98 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
99 /* count number of places needed to print wiphy_idx */
101 while (wiphy_idx /= 10)
104 * deny the name if it is phy<idx> where <idx> is printed
105 * without leading zeroes. taken == strlen(newname) here
107 if (taken == strlen(PHY_NAME) + digits)
112 /* Ignore nop renames */
113 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
116 /* Ensure another device does not already have this name. */
117 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
118 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
121 result = device_rename(&rdev->wiphy.dev, newname);
125 if (rdev->wiphy.debugfsdir &&
126 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
127 rdev->wiphy.debugfsdir,
128 rdev->wiphy.debugfsdir->d_parent,
130 pr_err("failed to rename debugfs dir to %s!\n", newname);
132 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
137 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
140 struct wireless_dev *wdev;
143 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
146 list_for_each_entry(wdev, &rdev->wdev_list, list) {
149 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
150 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
153 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
157 /* failed -- clean up to old netns */
158 net = wiphy_net(&rdev->wiphy);
160 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
164 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
165 err = dev_change_net_namespace(wdev->netdev, net,
168 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
174 wiphy_net_set(&rdev->wiphy, net);
176 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
182 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
184 struct cfg80211_registered_device *rdev = data;
186 rdev_rfkill_poll(rdev);
189 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
190 struct wireless_dev *wdev)
194 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
197 if (!wdev->p2p_started)
200 rdev_stop_p2p_device(rdev, wdev);
201 wdev->p2p_started = false;
205 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
206 if (WARN_ON(!rdev->scan_req->notified))
207 rdev->scan_req->aborted = true;
208 ___cfg80211_scan_done(rdev, false);
212 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
214 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
215 struct wireless_dev *wdev;
219 list_for_each_entry(wdev, &rdev->wdev_list, list) {
221 dev_close(wdev->netdev);
224 /* otherwise, check iftype */
225 switch (wdev->iftype) {
226 case NL80211_IFTYPE_P2P_DEVICE:
227 cfg80211_stop_p2p_device(rdev, wdev);
234 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
236 static int cfg80211_rfkill_set_block(void *data, bool blocked)
238 struct cfg80211_registered_device *rdev = data;
244 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
250 static void cfg80211_rfkill_sync_work(struct work_struct *work)
252 struct cfg80211_registered_device *rdev;
254 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
255 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
258 static void cfg80211_event_work(struct work_struct *work)
260 struct cfg80211_registered_device *rdev;
262 rdev = container_of(work, struct cfg80211_registered_device,
266 cfg80211_process_rdev_events(rdev);
270 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
272 struct cfg80211_iface_destroy *item;
276 spin_lock_irq(&rdev->destroy_list_lock);
277 while ((item = list_first_entry_or_null(&rdev->destroy_list,
278 struct cfg80211_iface_destroy,
280 struct wireless_dev *wdev, *tmp;
281 u32 nlportid = item->nlportid;
283 list_del(&item->list);
285 spin_unlock_irq(&rdev->destroy_list_lock);
287 list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
288 if (nlportid == wdev->owner_nlportid)
289 rdev_del_virtual_intf(rdev, wdev);
292 spin_lock_irq(&rdev->destroy_list_lock);
294 spin_unlock_irq(&rdev->destroy_list_lock);
297 static void cfg80211_destroy_iface_wk(struct work_struct *work)
299 struct cfg80211_registered_device *rdev;
301 rdev = container_of(work, struct cfg80211_registered_device,
305 cfg80211_destroy_ifaces(rdev);
309 /* exported functions */
311 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
313 static atomic_t wiphy_counter = ATOMIC_INIT(0);
315 struct cfg80211_registered_device *rdev;
318 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
319 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
320 WARN_ON(ops->connect && !ops->disconnect);
321 WARN_ON(ops->join_ibss && !ops->leave_ibss);
322 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
323 WARN_ON(ops->add_station && !ops->del_station);
324 WARN_ON(ops->add_mpath && !ops->del_mpath);
325 WARN_ON(ops->join_mesh && !ops->leave_mesh);
327 alloc_size = sizeof(*rdev) + sizeof_priv;
329 rdev = kzalloc(alloc_size, GFP_KERNEL);
335 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
337 if (unlikely(rdev->wiphy_idx < 0)) {
339 atomic_dec(&wiphy_counter);
344 /* atomic_inc_return makes it start at 1, make it start at 0 */
347 /* give it a proper name */
348 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
350 INIT_LIST_HEAD(&rdev->wdev_list);
351 INIT_LIST_HEAD(&rdev->beacon_registrations);
352 spin_lock_init(&rdev->beacon_registrations_lock);
353 spin_lock_init(&rdev->bss_lock);
354 INIT_LIST_HEAD(&rdev->bss_list);
355 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
356 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
357 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
358 cfg80211_dfs_channels_update_work);
359 #ifdef CONFIG_CFG80211_WEXT
360 rdev->wiphy.wext = &cfg80211_wext_handler;
363 device_initialize(&rdev->wiphy.dev);
364 rdev->wiphy.dev.class = &ieee80211_class;
365 rdev->wiphy.dev.platform_data = rdev;
367 INIT_LIST_HEAD(&rdev->destroy_list);
368 spin_lock_init(&rdev->destroy_list_lock);
369 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
371 #ifdef CONFIG_CFG80211_DEFAULT_PS
372 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
375 wiphy_net_set(&rdev->wiphy, &init_net);
377 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
378 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
379 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
380 &rdev->rfkill_ops, rdev);
387 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
388 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
389 INIT_WORK(&rdev->event_work, cfg80211_event_work);
391 init_waitqueue_head(&rdev->dev_wait);
394 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
395 * Fragmentation and RTS threshold are disabled by default with the
398 rdev->wiphy.retry_short = 7;
399 rdev->wiphy.retry_long = 4;
400 rdev->wiphy.frag_threshold = (u32) -1;
401 rdev->wiphy.rts_threshold = (u32) -1;
402 rdev->wiphy.coverage_class = 0;
404 rdev->wiphy.max_num_csa_counters = 1;
408 EXPORT_SYMBOL(wiphy_new);
410 static int wiphy_verify_combinations(struct wiphy *wiphy)
412 const struct ieee80211_iface_combination *c;
415 for (i = 0; i < wiphy->n_iface_combinations; i++) {
419 c = &wiphy->iface_combinations[i];
422 * Combinations with just one interface aren't real,
423 * however we make an exception for DFS.
425 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
428 /* Need at least one channel */
429 if (WARN_ON(!c->num_different_channels))
433 * Put a sane limit on maximum number of different
434 * channels to simplify channel accounting code.
436 if (WARN_ON(c->num_different_channels >
437 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
440 /* DFS only works on one channel. */
441 if (WARN_ON(c->radar_detect_widths &&
442 (c->num_different_channels > 1)))
445 if (WARN_ON(!c->n_limits))
448 for (j = 0; j < c->n_limits; j++) {
449 u16 types = c->limits[j].types;
451 /* interface types shouldn't overlap */
452 if (WARN_ON(types & all_iftypes))
454 all_iftypes |= types;
456 if (WARN_ON(!c->limits[j].max))
459 /* Shouldn't list software iftypes in combinations! */
460 if (WARN_ON(wiphy->software_iftypes & types))
463 /* Only a single P2P_DEVICE can be allowed */
464 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
465 c->limits[j].max > 1))
468 cnt += c->limits[j].max;
470 * Don't advertise an unsupported type
473 if (WARN_ON((wiphy->interface_modes & types) != types))
477 /* You can't even choose that many! */
478 if (WARN_ON(cnt < c->max_interfaces))
485 int wiphy_register(struct wiphy *wiphy)
487 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
489 enum ieee80211_band band;
490 struct ieee80211_supported_band *sband;
491 bool have_band = false;
493 u16 ifmodes = wiphy->interface_modes;
496 * There are major locking problems in nl80211/mac80211 for CSA,
497 * disable for all drivers until this has been reworked.
499 wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
502 if (WARN_ON(wiphy->wowlan &&
503 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
504 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
506 if (WARN_ON(wiphy->wowlan &&
507 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
508 !wiphy->wowlan->tcp))
512 if (WARN_ON(wiphy->coalesce &&
513 (!wiphy->coalesce->n_rules ||
514 !wiphy->coalesce->n_patterns) &&
515 (!wiphy->coalesce->pattern_min_len ||
516 wiphy->coalesce->pattern_min_len >
517 wiphy->coalesce->pattern_max_len)))
520 if (WARN_ON(wiphy->ap_sme_capa &&
521 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
524 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
527 if (WARN_ON(wiphy->addresses &&
528 !is_zero_ether_addr(wiphy->perm_addr) &&
529 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
533 if (WARN_ON(wiphy->max_acl_mac_addrs &&
534 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
535 !rdev->ops->set_mac_acl)))
538 if (wiphy->addresses)
539 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
541 /* sanity check ifmodes */
543 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
544 if (WARN_ON(ifmodes != wiphy->interface_modes))
545 wiphy->interface_modes = ifmodes;
547 res = wiphy_verify_combinations(wiphy);
551 /* sanity check supported bands/channels */
552 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
553 sband = wiphy->bands[band];
558 if (WARN_ON(!sband->n_channels))
561 * on 60gHz band, there are no legacy rates, so
564 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
569 * Since cfg80211_disable_40mhz_24ghz is global, we can
570 * modify the sband's ht data even if the driver uses a
571 * global structure for that.
573 if (cfg80211_disable_40mhz_24ghz &&
574 band == IEEE80211_BAND_2GHZ &&
575 sband->ht_cap.ht_supported) {
576 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
577 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
581 * Since we use a u32 for rate bitmaps in
582 * ieee80211_get_response_rate, we cannot
583 * have more than 32 legacy rates.
585 if (WARN_ON(sband->n_bitrates > 32))
588 for (i = 0; i < sband->n_channels; i++) {
589 sband->channels[i].orig_flags =
590 sband->channels[i].flags;
591 sband->channels[i].orig_mag = INT_MAX;
592 sband->channels[i].orig_mpwr =
593 sband->channels[i].max_power;
594 sband->channels[i].band = band;
606 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
607 (!rdev->wiphy.wowlan->pattern_min_len ||
608 rdev->wiphy.wowlan->pattern_min_len >
609 rdev->wiphy.wowlan->pattern_max_len)))
613 /* check and set up bitrates */
614 ieee80211_set_bitrate_flags(wiphy);
616 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
619 res = device_add(&rdev->wiphy.dev);
625 /* set up regulatory info */
626 wiphy_regulatory_register(wiphy);
628 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
629 cfg80211_rdev_list_generation++;
632 rdev->wiphy.debugfsdir =
633 debugfs_create_dir(wiphy_name(&rdev->wiphy),
634 ieee80211_debugfs_dir);
635 if (IS_ERR(rdev->wiphy.debugfsdir))
636 rdev->wiphy.debugfsdir = NULL;
638 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
639 struct regulatory_request request;
641 request.wiphy_idx = get_wiphy_idx(wiphy);
642 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
643 request.alpha2[0] = '9';
644 request.alpha2[1] = '9';
646 nl80211_send_reg_change_event(&request);
649 cfg80211_debugfs_rdev_add(rdev);
651 rdev->wiphy.registered = true;
654 res = rfkill_register(rdev->rfkill);
656 rfkill_destroy(rdev->rfkill);
658 wiphy_unregister(&rdev->wiphy);
662 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
666 EXPORT_SYMBOL(wiphy_register);
668 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
670 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
672 if (!rdev->ops->rfkill_poll)
674 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
675 rfkill_resume_polling(rdev->rfkill);
677 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
679 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
681 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
683 rfkill_pause_polling(rdev->rfkill);
685 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
687 void wiphy_unregister(struct wiphy *wiphy)
689 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
691 wait_event(rdev->dev_wait, ({
694 __count = rdev->opencount;
699 rfkill_unregister(rdev->rfkill);
702 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
703 rdev->wiphy.registered = false;
705 WARN_ON(!list_empty(&rdev->wdev_list));
708 * First remove the hardware from everywhere, this makes
709 * it impossible to find from userspace.
711 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
712 list_del_rcu(&rdev->list);
716 * If this device got a regulatory hint tell core its
717 * free to listen now to a new shiny device regulatory hint
719 wiphy_regulatory_deregister(wiphy);
721 cfg80211_rdev_list_generation++;
722 device_del(&rdev->wiphy.dev);
726 flush_work(&rdev->scan_done_wk);
727 cancel_work_sync(&rdev->conn_work);
728 flush_work(&rdev->event_work);
729 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
730 flush_work(&rdev->destroy_work);
733 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
734 rdev_set_wakeup(rdev, false);
736 cfg80211_rdev_free_wowlan(rdev);
737 cfg80211_rdev_free_coalesce(rdev);
739 EXPORT_SYMBOL(wiphy_unregister);
741 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
743 struct cfg80211_internal_bss *scan, *tmp;
744 struct cfg80211_beacon_registration *reg, *treg;
745 rfkill_destroy(rdev->rfkill);
746 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
747 list_del(®->list);
750 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
751 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
755 void wiphy_free(struct wiphy *wiphy)
757 put_device(&wiphy->dev);
759 EXPORT_SYMBOL(wiphy_free);
761 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
763 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
765 if (rfkill_set_hw_state(rdev->rfkill, blocked))
766 schedule_work(&rdev->rfkill_sync);
768 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
770 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
772 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
776 if (WARN_ON(wdev->netdev))
779 list_del_rcu(&wdev->list);
780 rdev->devlist_generation++;
782 switch (wdev->iftype) {
783 case NL80211_IFTYPE_P2P_DEVICE:
784 cfg80211_stop_p2p_device(rdev, wdev);
791 EXPORT_SYMBOL(cfg80211_unregister_wdev);
793 static const struct device_type wiphy_type = {
797 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
798 enum nl80211_iftype iftype, int num)
802 rdev->num_running_ifaces += num;
803 if (iftype == NL80211_IFTYPE_MONITOR)
804 rdev->num_running_monitor_ifaces += num;
807 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
808 struct wireless_dev *wdev)
810 struct net_device *dev = wdev->netdev;
813 ASSERT_WDEV_LOCK(wdev);
815 switch (wdev->iftype) {
816 case NL80211_IFTYPE_ADHOC:
817 __cfg80211_leave_ibss(rdev, dev, true);
819 case NL80211_IFTYPE_P2P_CLIENT:
820 case NL80211_IFTYPE_STATION:
821 if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
822 __cfg80211_stop_sched_scan(rdev, false);
824 #ifdef CONFIG_CFG80211_WEXT
825 kfree(wdev->wext.ie);
826 wdev->wext.ie = NULL;
827 wdev->wext.ie_len = 0;
828 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
830 cfg80211_disconnect(rdev, dev,
831 WLAN_REASON_DEAUTH_LEAVING, true);
833 case NL80211_IFTYPE_MESH_POINT:
834 __cfg80211_leave_mesh(rdev, dev);
836 case NL80211_IFTYPE_AP:
837 case NL80211_IFTYPE_P2P_GO:
838 __cfg80211_stop_ap(rdev, dev, true);
845 void cfg80211_leave(struct cfg80211_registered_device *rdev,
846 struct wireless_dev *wdev)
849 __cfg80211_leave(rdev, wdev);
853 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
856 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
857 struct cfg80211_event *ev;
860 trace_cfg80211_stop_iface(wiphy, wdev);
862 ev = kzalloc(sizeof(*ev), gfp);
866 ev->type = EVENT_STOPPED;
868 spin_lock_irqsave(&wdev->event_lock, flags);
869 list_add_tail(&ev->list, &wdev->event_list);
870 spin_unlock_irqrestore(&wdev->event_lock, flags);
871 queue_work(cfg80211_wq, &rdev->event_work);
873 EXPORT_SYMBOL(cfg80211_stop_iface);
875 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
876 unsigned long state, void *ptr)
878 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
879 struct wireless_dev *wdev = dev->ieee80211_ptr;
880 struct cfg80211_registered_device *rdev;
885 rdev = wiphy_to_rdev(wdev->wiphy);
887 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
890 case NETDEV_POST_INIT:
891 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
893 case NETDEV_REGISTER:
895 * NB: cannot take rdev->mtx here because this may be
896 * called within code protected by it when interfaces
897 * are added with nl80211.
899 mutex_init(&wdev->mtx);
900 INIT_LIST_HEAD(&wdev->event_list);
901 spin_lock_init(&wdev->event_lock);
902 INIT_LIST_HEAD(&wdev->mgmt_registrations);
903 spin_lock_init(&wdev->mgmt_registrations_lock);
905 wdev->identifier = ++rdev->wdev_id;
906 list_add_rcu(&wdev->list, &rdev->wdev_list);
907 rdev->devlist_generation++;
908 /* can only change netns with wiphy */
909 dev->features |= NETIF_F_NETNS_LOCAL;
911 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
913 pr_err("failed to add phy80211 symlink to netdev!\n");
916 #ifdef CONFIG_CFG80211_WEXT
917 wdev->wext.default_key = -1;
918 wdev->wext.default_mgmt_key = -1;
919 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
922 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
926 /* allow mac80211 to determine the timeout */
927 wdev->ps_timeout = -1;
929 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
930 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
931 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
932 dev->priv_flags |= IFF_DONT_BRIDGE;
934 case NETDEV_GOING_DOWN:
935 cfg80211_leave(rdev, wdev);
938 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
939 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
940 if (WARN_ON(!rdev->scan_req->notified))
941 rdev->scan_req->aborted = true;
942 ___cfg80211_scan_done(rdev, false);
945 if (WARN_ON(rdev->sched_scan_req &&
946 rdev->sched_scan_req->dev == wdev->netdev)) {
947 __cfg80211_stop_sched_scan(rdev, false);
951 wake_up(&rdev->dev_wait);
954 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
956 switch (wdev->iftype) {
957 #ifdef CONFIG_CFG80211_WEXT
958 case NL80211_IFTYPE_ADHOC:
959 cfg80211_ibss_wext_join(rdev, wdev);
961 case NL80211_IFTYPE_STATION:
962 cfg80211_mgd_wext_connect(rdev, wdev);
965 #ifdef CONFIG_MAC80211_MESH
966 case NL80211_IFTYPE_MESH_POINT:
968 /* backward compat code... */
969 struct mesh_setup setup;
970 memcpy(&setup, &default_mesh_setup,
972 /* back compat only needed for mesh_id */
973 setup.mesh_id = wdev->ssid;
974 setup.mesh_id_len = wdev->mesh_id_up_len;
975 if (wdev->mesh_id_up_len)
976 __cfg80211_join_mesh(rdev, dev,
978 &default_mesh_config);
989 * Configure power management to the driver here so that its
990 * correctly set also after interface type changes etc.
992 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
993 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
994 rdev->ops->set_power_mgmt)
995 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
997 /* assume this means it's off */
1001 case NETDEV_UNREGISTER:
1003 * It is possible to get NETDEV_UNREGISTER
1004 * multiple times. To detect that, check
1005 * that the interface is still on the list
1006 * of registered interfaces, and only then
1007 * remove and clean it up.
1009 if (!list_empty(&wdev->list)) {
1010 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1011 list_del_rcu(&wdev->list);
1012 rdev->devlist_generation++;
1013 cfg80211_mlme_purge_registrations(wdev);
1014 #ifdef CONFIG_CFG80211_WEXT
1015 kfree(wdev->wext.keys);
1019 * synchronise (so that we won't find this netdev
1020 * from other code any more) and then clear the list
1021 * head so that the above code can safely check for
1022 * !list_empty() to avoid double-cleanup.
1025 INIT_LIST_HEAD(&wdev->list);
1027 * Ensure that all events have been processed and
1030 cfg80211_process_wdev_events(wdev);
1032 if (WARN_ON(wdev->current_bss)) {
1033 cfg80211_unhold_bss(wdev->current_bss);
1034 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1035 wdev->current_bss = NULL;
1039 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1040 return notifier_from_errno(-EOPNOTSUPP);
1041 if (rfkill_blocked(rdev->rfkill))
1042 return notifier_from_errno(-ERFKILL);
1051 static struct notifier_block cfg80211_netdev_notifier = {
1052 .notifier_call = cfg80211_netdev_notifier_call,
1055 static void __net_exit cfg80211_pernet_exit(struct net *net)
1057 struct cfg80211_registered_device *rdev;
1060 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1061 if (net_eq(wiphy_net(&rdev->wiphy), net))
1062 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1067 static struct pernet_operations cfg80211_pernet_ops = {
1068 .exit = cfg80211_pernet_exit,
1071 static int __init cfg80211_init(void)
1075 err = register_pernet_device(&cfg80211_pernet_ops);
1077 goto out_fail_pernet;
1079 err = wiphy_sysfs_init();
1081 goto out_fail_sysfs;
1083 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1085 goto out_fail_notifier;
1087 err = nl80211_init();
1089 goto out_fail_nl80211;
1091 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1093 err = regulatory_init();
1097 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1108 debugfs_remove(ieee80211_debugfs_dir);
1110 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1114 unregister_pernet_device(&cfg80211_pernet_ops);
1118 subsys_initcall(cfg80211_init);
1120 static void __exit cfg80211_exit(void)
1122 debugfs_remove(ieee80211_debugfs_dir);
1124 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1127 unregister_pernet_device(&cfg80211_pernet_ops);
1128 destroy_workqueue(cfg80211_wq);
1130 module_exit(cfg80211_exit);