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_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 * There are major locking problems in nl80211/mac80211 for CSA,
498 * disable for all drivers until this has been reworked.
500 wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
503 if (WARN_ON(wiphy->wowlan &&
504 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
505 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
507 if (WARN_ON(wiphy->wowlan &&
508 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
509 !wiphy->wowlan->tcp))
513 if (WARN_ON(wiphy->coalesce &&
514 (!wiphy->coalesce->n_rules ||
515 !wiphy->coalesce->n_patterns) &&
516 (!wiphy->coalesce->pattern_min_len ||
517 wiphy->coalesce->pattern_min_len >
518 wiphy->coalesce->pattern_max_len)))
521 if (WARN_ON(wiphy->ap_sme_capa &&
522 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
525 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
528 if (WARN_ON(wiphy->addresses &&
529 !is_zero_ether_addr(wiphy->perm_addr) &&
530 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
534 if (WARN_ON(wiphy->max_acl_mac_addrs &&
535 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
536 !rdev->ops->set_mac_acl)))
539 if (wiphy->addresses)
540 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
542 /* sanity check ifmodes */
544 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
545 if (WARN_ON(ifmodes != wiphy->interface_modes))
546 wiphy->interface_modes = ifmodes;
548 res = wiphy_verify_combinations(wiphy);
552 /* sanity check supported bands/channels */
553 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
554 sband = wiphy->bands[band];
559 if (WARN_ON(!sband->n_channels))
562 * on 60gHz band, there are no legacy rates, so
565 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
570 * Since cfg80211_disable_40mhz_24ghz is global, we can
571 * modify the sband's ht data even if the driver uses a
572 * global structure for that.
574 if (cfg80211_disable_40mhz_24ghz &&
575 band == IEEE80211_BAND_2GHZ &&
576 sband->ht_cap.ht_supported) {
577 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
578 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
582 * Since we use a u32 for rate bitmaps in
583 * ieee80211_get_response_rate, we cannot
584 * have more than 32 legacy rates.
586 if (WARN_ON(sband->n_bitrates > 32))
589 for (i = 0; i < sband->n_channels; i++) {
590 sband->channels[i].orig_flags =
591 sband->channels[i].flags;
592 sband->channels[i].orig_mag = INT_MAX;
593 sband->channels[i].orig_mpwr =
594 sband->channels[i].max_power;
595 sband->channels[i].band = band;
607 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
608 (!rdev->wiphy.wowlan->pattern_min_len ||
609 rdev->wiphy.wowlan->pattern_min_len >
610 rdev->wiphy.wowlan->pattern_max_len)))
614 /* check and set up bitrates */
615 ieee80211_set_bitrate_flags(wiphy);
617 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
620 res = device_add(&rdev->wiphy.dev);
626 /* set up regulatory info */
627 wiphy_regulatory_register(wiphy);
629 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
630 cfg80211_rdev_list_generation++;
633 rdev->wiphy.debugfsdir =
634 debugfs_create_dir(wiphy_name(&rdev->wiphy),
635 ieee80211_debugfs_dir);
636 if (IS_ERR(rdev->wiphy.debugfsdir))
637 rdev->wiphy.debugfsdir = NULL;
639 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
640 struct regulatory_request request;
642 request.wiphy_idx = get_wiphy_idx(wiphy);
643 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
644 request.alpha2[0] = '9';
645 request.alpha2[1] = '9';
647 nl80211_send_reg_change_event(&request);
650 cfg80211_debugfs_rdev_add(rdev);
652 rdev->wiphy.registered = true;
655 res = rfkill_register(rdev->rfkill);
657 rfkill_destroy(rdev->rfkill);
659 wiphy_unregister(&rdev->wiphy);
663 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
667 EXPORT_SYMBOL(wiphy_register);
669 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
671 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
673 if (!rdev->ops->rfkill_poll)
675 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
676 rfkill_resume_polling(rdev->rfkill);
678 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
680 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
682 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
684 rfkill_pause_polling(rdev->rfkill);
686 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
688 void wiphy_unregister(struct wiphy *wiphy)
690 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
692 wait_event(rdev->dev_wait, ({
695 __count = rdev->opencount;
700 rfkill_unregister(rdev->rfkill);
703 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
704 rdev->wiphy.registered = false;
706 WARN_ON(!list_empty(&rdev->wdev_list));
709 * First remove the hardware from everywhere, this makes
710 * it impossible to find from userspace.
712 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
713 list_del_rcu(&rdev->list);
717 * If this device got a regulatory hint tell core its
718 * free to listen now to a new shiny device regulatory hint
720 wiphy_regulatory_deregister(wiphy);
722 cfg80211_rdev_list_generation++;
723 device_del(&rdev->wiphy.dev);
727 flush_work(&rdev->scan_done_wk);
728 cancel_work_sync(&rdev->conn_work);
729 flush_work(&rdev->event_work);
730 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
731 flush_work(&rdev->destroy_work);
734 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
735 rdev_set_wakeup(rdev, false);
737 cfg80211_rdev_free_wowlan(rdev);
738 cfg80211_rdev_free_coalesce(rdev);
740 EXPORT_SYMBOL(wiphy_unregister);
742 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
744 struct cfg80211_internal_bss *scan, *tmp;
745 struct cfg80211_beacon_registration *reg, *treg;
746 rfkill_destroy(rdev->rfkill);
747 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
748 list_del(®->list);
751 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
752 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
756 void wiphy_free(struct wiphy *wiphy)
758 put_device(&wiphy->dev);
760 EXPORT_SYMBOL(wiphy_free);
762 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
764 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
766 if (rfkill_set_hw_state(rdev->rfkill, blocked))
767 schedule_work(&rdev->rfkill_sync);
769 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
771 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
773 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
777 if (WARN_ON(wdev->netdev))
780 list_del_rcu(&wdev->list);
781 rdev->devlist_generation++;
783 switch (wdev->iftype) {
784 case NL80211_IFTYPE_P2P_DEVICE:
785 cfg80211_stop_p2p_device(rdev, wdev);
792 EXPORT_SYMBOL(cfg80211_unregister_wdev);
794 static const struct device_type wiphy_type = {
798 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
799 enum nl80211_iftype iftype, int num)
803 rdev->num_running_ifaces += num;
804 if (iftype == NL80211_IFTYPE_MONITOR)
805 rdev->num_running_monitor_ifaces += num;
808 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
809 struct wireless_dev *wdev)
811 struct net_device *dev = wdev->netdev;
814 ASSERT_WDEV_LOCK(wdev);
816 switch (wdev->iftype) {
817 case NL80211_IFTYPE_ADHOC:
818 __cfg80211_leave_ibss(rdev, dev, true);
820 case NL80211_IFTYPE_P2P_CLIENT:
821 case NL80211_IFTYPE_STATION:
822 if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
823 __cfg80211_stop_sched_scan(rdev, false);
825 #ifdef CONFIG_CFG80211_WEXT
826 kfree(wdev->wext.ie);
827 wdev->wext.ie = NULL;
828 wdev->wext.ie_len = 0;
829 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
831 cfg80211_disconnect(rdev, dev,
832 WLAN_REASON_DEAUTH_LEAVING, true);
834 case NL80211_IFTYPE_MESH_POINT:
835 __cfg80211_leave_mesh(rdev, dev);
837 case NL80211_IFTYPE_AP:
838 case NL80211_IFTYPE_P2P_GO:
839 __cfg80211_stop_ap(rdev, dev, true);
846 void cfg80211_leave(struct cfg80211_registered_device *rdev,
847 struct wireless_dev *wdev)
850 __cfg80211_leave(rdev, wdev);
854 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
857 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
858 struct cfg80211_event *ev;
861 trace_cfg80211_stop_iface(wiphy, wdev);
863 ev = kzalloc(sizeof(*ev), gfp);
867 ev->type = EVENT_STOPPED;
869 spin_lock_irqsave(&wdev->event_lock, flags);
870 list_add_tail(&ev->list, &wdev->event_list);
871 spin_unlock_irqrestore(&wdev->event_lock, flags);
872 queue_work(cfg80211_wq, &rdev->event_work);
874 EXPORT_SYMBOL(cfg80211_stop_iface);
876 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
877 unsigned long state, void *ptr)
879 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
880 struct wireless_dev *wdev = dev->ieee80211_ptr;
881 struct cfg80211_registered_device *rdev;
886 rdev = wiphy_to_rdev(wdev->wiphy);
888 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
891 case NETDEV_POST_INIT:
892 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
894 case NETDEV_REGISTER:
896 * NB: cannot take rdev->mtx here because this may be
897 * called within code protected by it when interfaces
898 * are added with nl80211.
900 mutex_init(&wdev->mtx);
901 INIT_LIST_HEAD(&wdev->event_list);
902 spin_lock_init(&wdev->event_lock);
903 INIT_LIST_HEAD(&wdev->mgmt_registrations);
904 spin_lock_init(&wdev->mgmt_registrations_lock);
906 wdev->identifier = ++rdev->wdev_id;
907 list_add_rcu(&wdev->list, &rdev->wdev_list);
908 rdev->devlist_generation++;
909 /* can only change netns with wiphy */
910 dev->features |= NETIF_F_NETNS_LOCAL;
912 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
914 pr_err("failed to add phy80211 symlink to netdev!\n");
917 #ifdef CONFIG_CFG80211_WEXT
918 wdev->wext.default_key = -1;
919 wdev->wext.default_mgmt_key = -1;
920 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
923 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
927 /* allow mac80211 to determine the timeout */
928 wdev->ps_timeout = -1;
930 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
932 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
933 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
934 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
935 dev->priv_flags |= IFF_DONT_BRIDGE;
937 case NETDEV_GOING_DOWN:
938 cfg80211_leave(rdev, wdev);
941 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
942 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
943 if (WARN_ON(!rdev->scan_req->notified))
944 rdev->scan_req->aborted = true;
945 ___cfg80211_scan_done(rdev, false);
948 if (WARN_ON(rdev->sched_scan_req &&
949 rdev->sched_scan_req->dev == wdev->netdev)) {
950 __cfg80211_stop_sched_scan(rdev, false);
954 wake_up(&rdev->dev_wait);
957 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
959 switch (wdev->iftype) {
960 #ifdef CONFIG_CFG80211_WEXT
961 case NL80211_IFTYPE_ADHOC:
962 cfg80211_ibss_wext_join(rdev, wdev);
964 case NL80211_IFTYPE_STATION:
965 cfg80211_mgd_wext_connect(rdev, wdev);
968 #ifdef CONFIG_MAC80211_MESH
969 case NL80211_IFTYPE_MESH_POINT:
971 /* backward compat code... */
972 struct mesh_setup setup;
973 memcpy(&setup, &default_mesh_setup,
975 /* back compat only needed for mesh_id */
976 setup.mesh_id = wdev->ssid;
977 setup.mesh_id_len = wdev->mesh_id_up_len;
978 if (wdev->mesh_id_up_len)
979 __cfg80211_join_mesh(rdev, dev,
981 &default_mesh_config);
992 * Configure power management to the driver here so that its
993 * correctly set also after interface type changes etc.
995 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
996 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
997 rdev->ops->set_power_mgmt)
998 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1000 /* assume this means it's off */
1004 case NETDEV_UNREGISTER:
1006 * It is possible to get NETDEV_UNREGISTER
1007 * multiple times. To detect that, check
1008 * that the interface is still on the list
1009 * of registered interfaces, and only then
1010 * remove and clean it up.
1012 if (!list_empty(&wdev->list)) {
1013 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1014 list_del_rcu(&wdev->list);
1015 rdev->devlist_generation++;
1016 cfg80211_mlme_purge_registrations(wdev);
1017 #ifdef CONFIG_CFG80211_WEXT
1018 kfree(wdev->wext.keys);
1022 * synchronise (so that we won't find this netdev
1023 * from other code any more) and then clear the list
1024 * head so that the above code can safely check for
1025 * !list_empty() to avoid double-cleanup.
1028 INIT_LIST_HEAD(&wdev->list);
1030 * Ensure that all events have been processed and
1033 cfg80211_process_wdev_events(wdev);
1035 if (WARN_ON(wdev->current_bss)) {
1036 cfg80211_unhold_bss(wdev->current_bss);
1037 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1038 wdev->current_bss = NULL;
1042 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1043 return notifier_from_errno(-EOPNOTSUPP);
1044 if (rfkill_blocked(rdev->rfkill))
1045 return notifier_from_errno(-ERFKILL);
1054 static struct notifier_block cfg80211_netdev_notifier = {
1055 .notifier_call = cfg80211_netdev_notifier_call,
1058 static void __net_exit cfg80211_pernet_exit(struct net *net)
1060 struct cfg80211_registered_device *rdev;
1063 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1064 if (net_eq(wiphy_net(&rdev->wiphy), net))
1065 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1070 static struct pernet_operations cfg80211_pernet_ops = {
1071 .exit = cfg80211_pernet_exit,
1074 static int __init cfg80211_init(void)
1078 err = register_pernet_device(&cfg80211_pernet_ops);
1080 goto out_fail_pernet;
1082 err = wiphy_sysfs_init();
1084 goto out_fail_sysfs;
1086 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1088 goto out_fail_notifier;
1090 err = nl80211_init();
1092 goto out_fail_nl80211;
1094 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1096 err = regulatory_init();
1100 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1111 debugfs_remove(ieee80211_debugfs_dir);
1113 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1117 unregister_pernet_device(&cfg80211_pernet_ops);
1121 subsys_initcall(cfg80211_init);
1123 static void __exit cfg80211_exit(void)
1125 debugfs_remove(ieee80211_debugfs_dir);
1127 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1130 unregister_pernet_device(&cfg80211_pernet_ops);
1131 destroy_workqueue(cfg80211_wq);
1133 module_exit(cfg80211_exit);