2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/nl80211.h>
16 #include <linux/debugfs.h>
17 #include <linux/notifier.h>
18 #include <linux/device.h>
19 #include <linux/etherdevice.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/sched.h>
22 #include <net/genetlink.h>
23 #include <net/cfg80211.h>
28 #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_rdev(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_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
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) {
207 if (WARN_ON(!rdev->scan_req->notified))
208 rdev->scan_req->aborted = true;
209 ___cfg80211_scan_done(rdev, false);
213 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
215 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
216 struct wireless_dev *wdev;
220 list_for_each_entry(wdev, &rdev->wdev_list, list) {
222 dev_close(wdev->netdev);
225 /* otherwise, check iftype */
226 switch (wdev->iftype) {
227 case NL80211_IFTYPE_P2P_DEVICE:
228 cfg80211_stop_p2p_device(rdev, wdev);
235 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
237 static int cfg80211_rfkill_set_block(void *data, bool blocked)
239 struct cfg80211_registered_device *rdev = data;
245 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
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_process_rdev_events(rdev);
271 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
273 struct cfg80211_iface_destroy *item;
277 spin_lock_irq(&rdev->destroy_list_lock);
278 while ((item = list_first_entry_or_null(&rdev->destroy_list,
279 struct cfg80211_iface_destroy,
281 struct wireless_dev *wdev, *tmp;
282 u32 nlportid = item->nlportid;
284 list_del(&item->list);
286 spin_unlock_irq(&rdev->destroy_list_lock);
288 list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
289 if (nlportid == wdev->owner_nlportid)
290 rdev_del_virtual_intf(rdev, wdev);
293 spin_lock_irq(&rdev->destroy_list_lock);
295 spin_unlock_irq(&rdev->destroy_list_lock);
298 static void cfg80211_destroy_iface_wk(struct work_struct *work)
300 struct cfg80211_registered_device *rdev;
302 rdev = container_of(work, struct cfg80211_registered_device,
306 cfg80211_destroy_ifaces(rdev);
310 /* exported functions */
312 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
314 static atomic_t wiphy_counter = ATOMIC_INIT(0);
316 struct cfg80211_registered_device *rdev;
319 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
320 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
321 WARN_ON(ops->connect && !ops->disconnect);
322 WARN_ON(ops->join_ibss && !ops->leave_ibss);
323 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
324 WARN_ON(ops->add_station && !ops->del_station);
325 WARN_ON(ops->add_mpath && !ops->del_mpath);
326 WARN_ON(ops->join_mesh && !ops->leave_mesh);
328 alloc_size = sizeof(*rdev) + sizeof_priv;
330 rdev = kzalloc(alloc_size, GFP_KERNEL);
336 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
338 if (unlikely(rdev->wiphy_idx < 0)) {
340 atomic_dec(&wiphy_counter);
345 /* atomic_inc_return makes it start at 1, make it start at 0 */
348 /* give it a proper name */
349 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
351 INIT_LIST_HEAD(&rdev->wdev_list);
352 INIT_LIST_HEAD(&rdev->beacon_registrations);
353 spin_lock_init(&rdev->beacon_registrations_lock);
354 spin_lock_init(&rdev->bss_lock);
355 INIT_LIST_HEAD(&rdev->bss_list);
356 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
357 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
358 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
359 cfg80211_dfs_channels_update_work);
360 #ifdef CONFIG_CFG80211_WEXT
361 rdev->wiphy.wext = &cfg80211_wext_handler;
364 device_initialize(&rdev->wiphy.dev);
365 rdev->wiphy.dev.class = &ieee80211_class;
366 rdev->wiphy.dev.platform_data = rdev;
368 INIT_LIST_HEAD(&rdev->destroy_list);
369 spin_lock_init(&rdev->destroy_list_lock);
370 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
372 #ifdef CONFIG_CFG80211_DEFAULT_PS
373 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
376 wiphy_net_set(&rdev->wiphy, &init_net);
378 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
379 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
380 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
381 &rdev->rfkill_ops, rdev);
388 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
389 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
390 INIT_WORK(&rdev->event_work, cfg80211_event_work);
392 init_waitqueue_head(&rdev->dev_wait);
395 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
396 * Fragmentation and RTS threshold are disabled by default with the
399 rdev->wiphy.retry_short = 7;
400 rdev->wiphy.retry_long = 4;
401 rdev->wiphy.frag_threshold = (u32) -1;
402 rdev->wiphy.rts_threshold = (u32) -1;
403 rdev->wiphy.coverage_class = 0;
405 rdev->wiphy.max_num_csa_counters = 1;
409 EXPORT_SYMBOL(wiphy_new);
411 static int wiphy_verify_combinations(struct wiphy *wiphy)
413 const struct ieee80211_iface_combination *c;
416 for (i = 0; i < wiphy->n_iface_combinations; i++) {
420 c = &wiphy->iface_combinations[i];
423 * Combinations with just one interface aren't real,
424 * however we make an exception for DFS.
426 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
429 /* Need at least one channel */
430 if (WARN_ON(!c->num_different_channels))
434 * Put a sane limit on maximum number of different
435 * channels to simplify channel accounting code.
437 if (WARN_ON(c->num_different_channels >
438 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
441 /* DFS only works on one channel. */
442 if (WARN_ON(c->radar_detect_widths &&
443 (c->num_different_channels > 1)))
446 if (WARN_ON(!c->n_limits))
449 for (j = 0; j < c->n_limits; j++) {
450 u16 types = c->limits[j].types;
452 /* interface types shouldn't overlap */
453 if (WARN_ON(types & all_iftypes))
455 all_iftypes |= types;
457 if (WARN_ON(!c->limits[j].max))
460 /* Shouldn't list software iftypes in combinations! */
461 if (WARN_ON(wiphy->software_iftypes & types))
464 /* Only a single P2P_DEVICE can be allowed */
465 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
466 c->limits[j].max > 1))
469 cnt += c->limits[j].max;
471 * Don't advertise an unsupported type
474 if (WARN_ON((wiphy->interface_modes & types) != types))
478 /* You can't even choose that many! */
479 if (WARN_ON(cnt < c->max_interfaces))
486 int wiphy_register(struct wiphy *wiphy)
488 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
490 enum ieee80211_band band;
491 struct ieee80211_supported_band *sband;
492 bool have_band = false;
494 u16 ifmodes = wiphy->interface_modes;
497 if (WARN_ON(wiphy->wowlan &&
498 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
499 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
501 if (WARN_ON(wiphy->wowlan &&
502 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
503 !wiphy->wowlan->tcp))
507 if (WARN_ON(wiphy->coalesce &&
508 (!wiphy->coalesce->n_rules ||
509 !wiphy->coalesce->n_patterns) &&
510 (!wiphy->coalesce->pattern_min_len ||
511 wiphy->coalesce->pattern_min_len >
512 wiphy->coalesce->pattern_max_len)))
515 if (WARN_ON(wiphy->ap_sme_capa &&
516 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
519 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
522 if (WARN_ON(wiphy->addresses &&
523 !is_zero_ether_addr(wiphy->perm_addr) &&
524 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
528 if (WARN_ON(wiphy->max_acl_mac_addrs &&
529 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
530 !rdev->ops->set_mac_acl)))
533 if (wiphy->addresses)
534 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
536 /* sanity check ifmodes */
538 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
539 if (WARN_ON(ifmodes != wiphy->interface_modes))
540 wiphy->interface_modes = ifmodes;
542 res = wiphy_verify_combinations(wiphy);
546 /* sanity check supported bands/channels */
547 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
548 sband = wiphy->bands[band];
553 if (WARN_ON(!sband->n_channels))
556 * on 60gHz band, there are no legacy rates, so
559 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
564 * Since cfg80211_disable_40mhz_24ghz is global, we can
565 * modify the sband's ht data even if the driver uses a
566 * global structure for that.
568 if (cfg80211_disable_40mhz_24ghz &&
569 band == IEEE80211_BAND_2GHZ &&
570 sband->ht_cap.ht_supported) {
571 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
572 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
576 * Since we use a u32 for rate bitmaps in
577 * ieee80211_get_response_rate, we cannot
578 * have more than 32 legacy rates.
580 if (WARN_ON(sband->n_bitrates > 32))
583 for (i = 0; i < sband->n_channels; i++) {
584 sband->channels[i].orig_flags =
585 sband->channels[i].flags;
586 sband->channels[i].orig_mag = INT_MAX;
587 sband->channels[i].orig_mpwr =
588 sband->channels[i].max_power;
589 sband->channels[i].band = band;
601 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
602 (!rdev->wiphy.wowlan->pattern_min_len ||
603 rdev->wiphy.wowlan->pattern_min_len >
604 rdev->wiphy.wowlan->pattern_max_len)))
608 /* check and set up bitrates */
609 ieee80211_set_bitrate_flags(wiphy);
611 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
614 res = device_add(&rdev->wiphy.dev);
620 /* set up regulatory info */
621 wiphy_regulatory_register(wiphy);
623 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
624 cfg80211_rdev_list_generation++;
627 rdev->wiphy.debugfsdir =
628 debugfs_create_dir(wiphy_name(&rdev->wiphy),
629 ieee80211_debugfs_dir);
630 if (IS_ERR(rdev->wiphy.debugfsdir))
631 rdev->wiphy.debugfsdir = NULL;
633 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
634 struct regulatory_request request;
636 request.wiphy_idx = get_wiphy_idx(wiphy);
637 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
638 request.alpha2[0] = '9';
639 request.alpha2[1] = '9';
641 nl80211_send_reg_change_event(&request);
644 cfg80211_debugfs_rdev_add(rdev);
646 rdev->wiphy.registered = true;
649 res = rfkill_register(rdev->rfkill);
651 rfkill_destroy(rdev->rfkill);
653 wiphy_unregister(&rdev->wiphy);
657 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
661 EXPORT_SYMBOL(wiphy_register);
663 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
665 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
667 if (!rdev->ops->rfkill_poll)
669 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
670 rfkill_resume_polling(rdev->rfkill);
672 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
674 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
676 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
678 rfkill_pause_polling(rdev->rfkill);
680 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
682 void wiphy_unregister(struct wiphy *wiphy)
684 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
686 wait_event(rdev->dev_wait, ({
689 __count = rdev->opencount;
694 rfkill_unregister(rdev->rfkill);
697 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
698 rdev->wiphy.registered = false;
700 WARN_ON(!list_empty(&rdev->wdev_list));
703 * First remove the hardware from everywhere, this makes
704 * it impossible to find from userspace.
706 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
707 list_del_rcu(&rdev->list);
711 * If this device got a regulatory hint tell core its
712 * free to listen now to a new shiny device regulatory hint
714 wiphy_regulatory_deregister(wiphy);
716 cfg80211_rdev_list_generation++;
717 device_del(&rdev->wiphy.dev);
721 flush_work(&rdev->scan_done_wk);
722 cancel_work_sync(&rdev->conn_work);
723 flush_work(&rdev->event_work);
724 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
725 flush_work(&rdev->destroy_work);
728 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
729 rdev_set_wakeup(rdev, false);
731 cfg80211_rdev_free_wowlan(rdev);
732 cfg80211_rdev_free_coalesce(rdev);
734 EXPORT_SYMBOL(wiphy_unregister);
736 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
738 struct cfg80211_internal_bss *scan, *tmp;
739 struct cfg80211_beacon_registration *reg, *treg;
740 rfkill_destroy(rdev->rfkill);
741 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
742 list_del(®->list);
745 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
746 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
750 void wiphy_free(struct wiphy *wiphy)
752 put_device(&wiphy->dev);
754 EXPORT_SYMBOL(wiphy_free);
756 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
758 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
760 if (rfkill_set_hw_state(rdev->rfkill, blocked))
761 schedule_work(&rdev->rfkill_sync);
763 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
765 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
767 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
771 if (WARN_ON(wdev->netdev))
774 list_del_rcu(&wdev->list);
775 rdev->devlist_generation++;
777 switch (wdev->iftype) {
778 case NL80211_IFTYPE_P2P_DEVICE:
779 cfg80211_stop_p2p_device(rdev, wdev);
786 EXPORT_SYMBOL(cfg80211_unregister_wdev);
788 static const struct device_type wiphy_type = {
792 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
793 enum nl80211_iftype iftype, int num)
797 rdev->num_running_ifaces += num;
798 if (iftype == NL80211_IFTYPE_MONITOR)
799 rdev->num_running_monitor_ifaces += num;
802 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
803 struct wireless_dev *wdev)
805 struct net_device *dev = wdev->netdev;
808 ASSERT_WDEV_LOCK(wdev);
810 switch (wdev->iftype) {
811 case NL80211_IFTYPE_ADHOC:
812 __cfg80211_leave_ibss(rdev, dev, true);
814 case NL80211_IFTYPE_P2P_CLIENT:
815 case NL80211_IFTYPE_STATION:
816 if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
817 __cfg80211_stop_sched_scan(rdev, false);
819 #ifdef CONFIG_CFG80211_WEXT
820 kfree(wdev->wext.ie);
821 wdev->wext.ie = NULL;
822 wdev->wext.ie_len = 0;
823 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
825 cfg80211_disconnect(rdev, dev,
826 WLAN_REASON_DEAUTH_LEAVING, true);
828 case NL80211_IFTYPE_MESH_POINT:
829 __cfg80211_leave_mesh(rdev, dev);
831 case NL80211_IFTYPE_AP:
832 case NL80211_IFTYPE_P2P_GO:
833 __cfg80211_stop_ap(rdev, dev, true);
840 void cfg80211_leave(struct cfg80211_registered_device *rdev,
841 struct wireless_dev *wdev)
844 __cfg80211_leave(rdev, wdev);
848 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
851 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
852 struct cfg80211_event *ev;
855 trace_cfg80211_stop_iface(wiphy, wdev);
857 ev = kzalloc(sizeof(*ev), gfp);
861 ev->type = EVENT_STOPPED;
863 spin_lock_irqsave(&wdev->event_lock, flags);
864 list_add_tail(&ev->list, &wdev->event_list);
865 spin_unlock_irqrestore(&wdev->event_lock, flags);
866 queue_work(cfg80211_wq, &rdev->event_work);
868 EXPORT_SYMBOL(cfg80211_stop_iface);
870 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
871 unsigned long state, void *ptr)
873 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
874 struct wireless_dev *wdev = dev->ieee80211_ptr;
875 struct cfg80211_registered_device *rdev;
880 rdev = wiphy_to_rdev(wdev->wiphy);
882 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
885 case NETDEV_POST_INIT:
886 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
888 case NETDEV_REGISTER:
890 * NB: cannot take rdev->mtx here because this may be
891 * called within code protected by it when interfaces
892 * are added with nl80211.
894 mutex_init(&wdev->mtx);
895 INIT_LIST_HEAD(&wdev->event_list);
896 spin_lock_init(&wdev->event_lock);
897 INIT_LIST_HEAD(&wdev->mgmt_registrations);
898 spin_lock_init(&wdev->mgmt_registrations_lock);
900 wdev->identifier = ++rdev->wdev_id;
901 list_add_rcu(&wdev->list, &rdev->wdev_list);
902 rdev->devlist_generation++;
903 /* can only change netns with wiphy */
904 dev->features |= NETIF_F_NETNS_LOCAL;
906 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
908 pr_err("failed to add phy80211 symlink to netdev!\n");
911 #ifdef CONFIG_CFG80211_WEXT
912 wdev->wext.default_key = -1;
913 wdev->wext.default_mgmt_key = -1;
914 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
917 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
921 /* allow mac80211 to determine the timeout */
922 wdev->ps_timeout = -1;
924 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
925 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
926 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
927 dev->priv_flags |= IFF_DONT_BRIDGE;
929 case NETDEV_GOING_DOWN:
930 cfg80211_leave(rdev, wdev);
933 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
934 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
935 if (WARN_ON(!rdev->scan_req->notified))
936 rdev->scan_req->aborted = true;
937 ___cfg80211_scan_done(rdev, false);
940 if (WARN_ON(rdev->sched_scan_req &&
941 rdev->sched_scan_req->dev == wdev->netdev)) {
942 __cfg80211_stop_sched_scan(rdev, false);
946 wake_up(&rdev->dev_wait);
949 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
951 switch (wdev->iftype) {
952 #ifdef CONFIG_CFG80211_WEXT
953 case NL80211_IFTYPE_ADHOC:
954 cfg80211_ibss_wext_join(rdev, wdev);
956 case NL80211_IFTYPE_STATION:
957 cfg80211_mgd_wext_connect(rdev, wdev);
960 #ifdef CONFIG_MAC80211_MESH
961 case NL80211_IFTYPE_MESH_POINT:
963 /* backward compat code... */
964 struct mesh_setup setup;
965 memcpy(&setup, &default_mesh_setup,
967 /* back compat only needed for mesh_id */
968 setup.mesh_id = wdev->ssid;
969 setup.mesh_id_len = wdev->mesh_id_up_len;
970 if (wdev->mesh_id_up_len)
971 __cfg80211_join_mesh(rdev, dev,
973 &default_mesh_config);
984 * Configure power management to the driver here so that its
985 * correctly set also after interface type changes etc.
987 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
988 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
989 rdev->ops->set_power_mgmt)
990 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
992 /* assume this means it's off */
996 case NETDEV_UNREGISTER:
998 * It is possible to get NETDEV_UNREGISTER
999 * multiple times. To detect that, check
1000 * that the interface is still on the list
1001 * of registered interfaces, and only then
1002 * remove and clean it up.
1004 if (!list_empty(&wdev->list)) {
1005 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1006 list_del_rcu(&wdev->list);
1007 rdev->devlist_generation++;
1008 cfg80211_mlme_purge_registrations(wdev);
1009 #ifdef CONFIG_CFG80211_WEXT
1010 kfree(wdev->wext.keys);
1014 * synchronise (so that we won't find this netdev
1015 * from other code any more) and then clear the list
1016 * head so that the above code can safely check for
1017 * !list_empty() to avoid double-cleanup.
1020 INIT_LIST_HEAD(&wdev->list);
1022 * Ensure that all events have been processed and
1025 cfg80211_process_wdev_events(wdev);
1027 if (WARN_ON(wdev->current_bss)) {
1028 cfg80211_unhold_bss(wdev->current_bss);
1029 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1030 wdev->current_bss = NULL;
1034 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1035 return notifier_from_errno(-EOPNOTSUPP);
1036 if (rfkill_blocked(rdev->rfkill))
1037 return notifier_from_errno(-ERFKILL);
1046 static struct notifier_block cfg80211_netdev_notifier = {
1047 .notifier_call = cfg80211_netdev_notifier_call,
1050 static void __net_exit cfg80211_pernet_exit(struct net *net)
1052 struct cfg80211_registered_device *rdev;
1055 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1056 if (net_eq(wiphy_net(&rdev->wiphy), net))
1057 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1062 static struct pernet_operations cfg80211_pernet_ops = {
1063 .exit = cfg80211_pernet_exit,
1066 static int __init cfg80211_init(void)
1070 err = register_pernet_device(&cfg80211_pernet_ops);
1072 goto out_fail_pernet;
1074 err = wiphy_sysfs_init();
1076 goto out_fail_sysfs;
1078 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1080 goto out_fail_notifier;
1082 err = nl80211_init();
1084 goto out_fail_nl80211;
1086 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1088 err = regulatory_init();
1092 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1103 debugfs_remove(ieee80211_debugfs_dir);
1105 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1109 unregister_pernet_device(&cfg80211_pernet_ops);
1113 subsys_initcall(cfg80211_init);
1115 static void __exit cfg80211_exit(void)
1117 debugfs_remove(ieee80211_debugfs_dir);
1119 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1122 unregister_pernet_device(&cfg80211_pernet_ops);
1123 destroy_workqueue(cfg80211_wq);
1125 module_exit(cfg80211_exit);