2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/nl80211.h>
15 #include <linux/debugfs.h>
16 #include <linux/notifier.h>
17 #include <linux/device.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/sched.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
27 #include "wext-compat.h"
31 /* name for sysfs, %d is appended */
32 #define PHY_NAME "phy"
34 MODULE_AUTHOR("Johannes Berg");
35 MODULE_LICENSE("GPL");
36 MODULE_DESCRIPTION("wireless configuration support");
37 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39 /* RCU-protected (and RTNL for writers) */
40 LIST_HEAD(cfg80211_rdev_list);
41 int cfg80211_rdev_list_generation;
44 static struct dentry *ieee80211_debugfs_dir;
46 /* for the cleanup, scan and event works */
47 struct workqueue_struct *cfg80211_wq;
49 static bool cfg80211_disable_40mhz_24ghz;
50 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
54 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56 struct cfg80211_registered_device *result = NULL, *rdev;
60 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
70 int get_wiphy_idx(struct wiphy *wiphy)
72 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
74 return rdev->wiphy_idx;
77 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79 struct cfg80211_registered_device *rdev;
83 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
89 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
92 struct cfg80211_registered_device *rdev2;
93 int wiphy_idx, taken = -1, result, digits;
97 /* prohibit calling the thing phy%d when %d is not its number */
98 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
99 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
100 /* count number of places needed to print wiphy_idx */
102 while (wiphy_idx /= 10)
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
108 if (taken == strlen(PHY_NAME) + digits)
113 /* Ignore nop renames */
114 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
117 /* Ensure another device does not already have this name. */
118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
122 result = device_rename(&rdev->wiphy.dev, newname);
126 if (rdev->wiphy.debugfsdir &&
127 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
128 rdev->wiphy.debugfsdir,
129 rdev->wiphy.debugfsdir->d_parent,
131 pr_err("failed to rename debugfs dir to %s!\n", newname);
133 nl80211_notify_dev_rename(rdev);
138 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
141 struct wireless_dev *wdev;
144 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
147 list_for_each_entry(wdev, &rdev->wdev_list, list) {
150 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
151 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
154 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
158 /* failed -- clean up to old netns */
159 net = wiphy_net(&rdev->wiphy);
161 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
165 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
166 err = dev_change_net_namespace(wdev->netdev, net,
169 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
175 wiphy_net_set(&rdev->wiphy, net);
177 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
183 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
185 struct cfg80211_registered_device *rdev = data;
187 rdev_rfkill_poll(rdev);
190 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev)
195 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
198 if (!wdev->p2p_started)
201 rdev_stop_p2p_device(rdev, wdev);
202 wdev->p2p_started = false;
206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
208 * If the scan request wasn't notified as done, set it
209 * to aborted and leak it after a warning. The driver
210 * should have notified us that it ended at the latest
211 * during rdev_stop_p2p_device().
213 if (WARN_ON(!rdev->scan_req->notified))
214 rdev->scan_req->aborted = true;
215 ___cfg80211_scan_done(rdev, !rdev->scan_req->notified);
219 static int cfg80211_rfkill_set_block(void *data, bool blocked)
221 struct cfg80211_registered_device *rdev = data;
222 struct wireless_dev *wdev;
229 list_for_each_entry(wdev, &rdev->wdev_list, list) {
231 dev_close(wdev->netdev);
234 /* otherwise, check iftype */
235 switch (wdev->iftype) {
236 case NL80211_IFTYPE_P2P_DEVICE:
237 cfg80211_stop_p2p_device(rdev, wdev);
249 static void cfg80211_rfkill_sync_work(struct work_struct *work)
251 struct cfg80211_registered_device *rdev;
253 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
254 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
257 static void cfg80211_event_work(struct work_struct *work)
259 struct cfg80211_registered_device *rdev;
261 rdev = container_of(work, struct cfg80211_registered_device,
265 cfg80211_process_rdev_events(rdev);
269 /* exported functions */
271 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
273 static atomic_t wiphy_counter = ATOMIC_INIT(0);
275 struct cfg80211_registered_device *rdev;
278 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
279 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
280 WARN_ON(ops->connect && !ops->disconnect);
281 WARN_ON(ops->join_ibss && !ops->leave_ibss);
282 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
283 WARN_ON(ops->add_station && !ops->del_station);
284 WARN_ON(ops->add_mpath && !ops->del_mpath);
285 WARN_ON(ops->join_mesh && !ops->leave_mesh);
287 alloc_size = sizeof(*rdev) + sizeof_priv;
289 rdev = kzalloc(alloc_size, GFP_KERNEL);
295 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
297 if (unlikely(rdev->wiphy_idx < 0)) {
299 atomic_dec(&wiphy_counter);
304 /* give it a proper name */
305 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
307 INIT_LIST_HEAD(&rdev->wdev_list);
308 INIT_LIST_HEAD(&rdev->beacon_registrations);
309 spin_lock_init(&rdev->beacon_registrations_lock);
310 spin_lock_init(&rdev->bss_lock);
311 INIT_LIST_HEAD(&rdev->bss_list);
312 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
313 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
314 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
315 cfg80211_dfs_channels_update_work);
316 #ifdef CONFIG_CFG80211_WEXT
317 rdev->wiphy.wext = &cfg80211_wext_handler;
320 device_initialize(&rdev->wiphy.dev);
321 rdev->wiphy.dev.class = &ieee80211_class;
322 rdev->wiphy.dev.platform_data = rdev;
324 #ifdef CONFIG_CFG80211_DEFAULT_PS
325 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
328 wiphy_net_set(&rdev->wiphy, &init_net);
330 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
331 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
332 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
333 &rdev->rfkill_ops, rdev);
340 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
341 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
342 INIT_WORK(&rdev->event_work, cfg80211_event_work);
344 init_waitqueue_head(&rdev->dev_wait);
347 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
348 * Fragmentation and RTS threshold are disabled by default with the
351 rdev->wiphy.retry_short = 7;
352 rdev->wiphy.retry_long = 4;
353 rdev->wiphy.frag_threshold = (u32) -1;
354 rdev->wiphy.rts_threshold = (u32) -1;
355 rdev->wiphy.coverage_class = 0;
357 rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
361 EXPORT_SYMBOL(wiphy_new);
363 static int wiphy_verify_combinations(struct wiphy *wiphy)
365 const struct ieee80211_iface_combination *c;
368 for (i = 0; i < wiphy->n_iface_combinations; i++) {
372 c = &wiphy->iface_combinations[i];
375 * Combinations with just one interface aren't real,
376 * however we make an exception for DFS.
378 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
381 /* Need at least one channel */
382 if (WARN_ON(!c->num_different_channels))
386 * Put a sane limit on maximum number of different
387 * channels to simplify channel accounting code.
389 if (WARN_ON(c->num_different_channels >
390 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
393 /* DFS only works on one channel. */
394 if (WARN_ON(c->radar_detect_widths &&
395 (c->num_different_channels > 1)))
398 if (WARN_ON(!c->n_limits))
401 for (j = 0; j < c->n_limits; j++) {
402 u16 types = c->limits[j].types;
405 * interface types shouldn't overlap, this is
406 * used in cfg80211_can_change_interface()
408 if (WARN_ON(types & all_iftypes))
410 all_iftypes |= types;
412 if (WARN_ON(!c->limits[j].max))
415 /* Shouldn't list software iftypes in combinations! */
416 if (WARN_ON(wiphy->software_iftypes & types))
419 /* Only a single P2P_DEVICE can be allowed */
420 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
421 c->limits[j].max > 1))
424 cnt += c->limits[j].max;
426 * Don't advertise an unsupported type
429 if (WARN_ON((wiphy->interface_modes & types) != types))
433 /* You can't even choose that many! */
434 if (WARN_ON(cnt < c->max_interfaces))
441 int wiphy_register(struct wiphy *wiphy)
443 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
445 enum ieee80211_band band;
446 struct ieee80211_supported_band *sband;
447 bool have_band = false;
449 u16 ifmodes = wiphy->interface_modes;
452 if (WARN_ON(wiphy->wowlan &&
453 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
454 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
456 if (WARN_ON(wiphy->wowlan &&
457 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
458 !wiphy->wowlan->tcp))
462 if (WARN_ON(wiphy->ap_sme_capa &&
463 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
466 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
469 if (WARN_ON(wiphy->addresses &&
470 !is_zero_ether_addr(wiphy->perm_addr) &&
471 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
475 if (WARN_ON(wiphy->max_acl_mac_addrs &&
476 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
477 !rdev->ops->set_mac_acl)))
480 if (wiphy->addresses)
481 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
483 /* sanity check ifmodes */
485 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
486 if (WARN_ON(ifmodes != wiphy->interface_modes))
487 wiphy->interface_modes = ifmodes;
489 res = wiphy_verify_combinations(wiphy);
493 /* sanity check supported bands/channels */
494 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
495 sband = wiphy->bands[band];
500 if (WARN_ON(!sband->n_channels))
503 * on 60gHz band, there are no legacy rates, so
506 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
511 * Since cfg80211_disable_40mhz_24ghz is global, we can
512 * modify the sband's ht data even if the driver uses a
513 * global structure for that.
515 if (cfg80211_disable_40mhz_24ghz &&
516 band == IEEE80211_BAND_2GHZ &&
517 sband->ht_cap.ht_supported) {
518 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
519 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
523 * Since we use a u32 for rate bitmaps in
524 * ieee80211_get_response_rate, we cannot
525 * have more than 32 legacy rates.
527 if (WARN_ON(sband->n_bitrates > 32))
530 for (i = 0; i < sband->n_channels; i++) {
531 sband->channels[i].orig_flags =
532 sband->channels[i].flags;
533 sband->channels[i].orig_mag = INT_MAX;
534 sband->channels[i].orig_mpwr =
535 sband->channels[i].max_power;
536 sband->channels[i].band = band;
548 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
549 (!rdev->wiphy.wowlan->pattern_min_len ||
550 rdev->wiphy.wowlan->pattern_min_len >
551 rdev->wiphy.wowlan->pattern_max_len)))
555 /* check and set up bitrates */
556 ieee80211_set_bitrate_flags(wiphy);
560 res = device_add(&rdev->wiphy.dev);
566 /* set up regulatory info */
567 wiphy_regulatory_register(wiphy);
569 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
570 cfg80211_rdev_list_generation++;
573 rdev->wiphy.debugfsdir =
574 debugfs_create_dir(wiphy_name(&rdev->wiphy),
575 ieee80211_debugfs_dir);
576 if (IS_ERR(rdev->wiphy.debugfsdir))
577 rdev->wiphy.debugfsdir = NULL;
579 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
580 struct regulatory_request request;
582 request.wiphy_idx = get_wiphy_idx(wiphy);
583 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
584 request.alpha2[0] = '9';
585 request.alpha2[1] = '9';
587 nl80211_send_reg_change_event(&request);
590 cfg80211_debugfs_rdev_add(rdev);
592 res = rfkill_register(rdev->rfkill);
594 device_del(&rdev->wiphy.dev);
596 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
597 list_del_rcu(&rdev->list);
598 wiphy_regulatory_deregister(wiphy);
603 rdev->wiphy.registered = true;
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);
632 wait_event(rdev->dev_wait, ({
635 __count = rdev->opencount;
640 rdev->wiphy.registered = false;
642 rfkill_unregister(rdev->rfkill);
644 BUG_ON(!list_empty(&rdev->wdev_list));
647 * First remove the hardware from everywhere, this makes
648 * it impossible to find from userspace.
650 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
651 list_del_rcu(&rdev->list);
655 * If this device got a regulatory hint tell core its
656 * free to listen now to a new shiny device regulatory hint
658 wiphy_regulatory_deregister(wiphy);
660 cfg80211_rdev_list_generation++;
661 device_del(&rdev->wiphy.dev);
665 flush_work(&rdev->scan_done_wk);
666 cancel_work_sync(&rdev->conn_work);
667 flush_work(&rdev->event_work);
668 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
671 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
672 rdev_set_wakeup(rdev, false);
674 cfg80211_rdev_free_wowlan(rdev);
676 EXPORT_SYMBOL(wiphy_unregister);
678 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
680 struct cfg80211_internal_bss *scan, *tmp;
681 struct cfg80211_beacon_registration *reg, *treg;
682 rfkill_destroy(rdev->rfkill);
683 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
684 list_del(®->list);
687 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
688 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
692 void wiphy_free(struct wiphy *wiphy)
694 put_device(&wiphy->dev);
696 EXPORT_SYMBOL(wiphy_free);
698 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
700 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
702 if (rfkill_set_hw_state(rdev->rfkill, blocked))
703 schedule_work(&rdev->rfkill_sync);
705 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
707 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
709 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
713 if (WARN_ON(wdev->netdev))
716 list_del_rcu(&wdev->list);
717 rdev->devlist_generation++;
719 switch (wdev->iftype) {
720 case NL80211_IFTYPE_P2P_DEVICE:
721 cfg80211_stop_p2p_device(rdev, wdev);
728 EXPORT_SYMBOL(cfg80211_unregister_wdev);
730 static struct device_type wiphy_type = {
734 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
735 enum nl80211_iftype iftype, int num)
739 rdev->num_running_ifaces += num;
740 if (iftype == NL80211_IFTYPE_MONITOR)
741 rdev->num_running_monitor_ifaces += num;
744 void cfg80211_leave(struct cfg80211_registered_device *rdev,
745 struct wireless_dev *wdev)
747 struct net_device *dev = wdev->netdev;
749 switch (wdev->iftype) {
750 case NL80211_IFTYPE_ADHOC:
751 cfg80211_leave_ibss(rdev, dev, true);
753 case NL80211_IFTYPE_P2P_CLIENT:
754 case NL80211_IFTYPE_STATION:
755 __cfg80211_stop_sched_scan(rdev, false);
758 #ifdef CONFIG_CFG80211_WEXT
759 kfree(wdev->wext.ie);
760 wdev->wext.ie = NULL;
761 wdev->wext.ie_len = 0;
762 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
764 cfg80211_disconnect(rdev, dev,
765 WLAN_REASON_DEAUTH_LEAVING, true);
768 case NL80211_IFTYPE_MESH_POINT:
769 cfg80211_leave_mesh(rdev, dev);
771 case NL80211_IFTYPE_AP:
772 cfg80211_stop_ap(rdev, dev);
778 wdev->beacon_interval = 0;
781 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
785 struct net_device *dev = ndev;
786 struct wireless_dev *wdev = dev->ieee80211_ptr;
787 struct cfg80211_registered_device *rdev;
793 rdev = wiphy_to_dev(wdev->wiphy);
795 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
798 case NETDEV_POST_INIT:
799 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
801 case NETDEV_REGISTER:
803 * NB: cannot take rdev->mtx here because this may be
804 * called within code protected by it when interfaces
805 * are added with nl80211.
807 mutex_init(&wdev->mtx);
808 INIT_LIST_HEAD(&wdev->event_list);
809 spin_lock_init(&wdev->event_lock);
810 INIT_LIST_HEAD(&wdev->mgmt_registrations);
811 spin_lock_init(&wdev->mgmt_registrations_lock);
813 wdev->identifier = ++rdev->wdev_id;
814 list_add_rcu(&wdev->list, &rdev->wdev_list);
815 rdev->devlist_generation++;
816 /* can only change netns with wiphy */
817 dev->features |= NETIF_F_NETNS_LOCAL;
819 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
821 pr_err("failed to add phy80211 symlink to netdev!\n");
824 wdev->sme_state = CFG80211_SME_IDLE;
825 #ifdef CONFIG_CFG80211_WEXT
826 wdev->wext.default_key = -1;
827 wdev->wext.default_mgmt_key = -1;
828 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
831 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
835 /* allow mac80211 to determine the timeout */
836 wdev->ps_timeout = -1;
838 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
840 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
841 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
842 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
843 dev->priv_flags |= IFF_DONT_BRIDGE;
845 case NETDEV_GOING_DOWN:
846 cfg80211_leave(rdev, wdev);
849 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
850 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
851 if (WARN_ON(!rdev->scan_req->notified))
852 rdev->scan_req->aborted = true;
853 ___cfg80211_scan_done(rdev, true);
856 if (WARN_ON(rdev->sched_scan_req &&
857 rdev->sched_scan_req->dev == wdev->netdev)) {
858 __cfg80211_stop_sched_scan(rdev, false);
862 wake_up(&rdev->dev_wait);
865 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
867 switch (wdev->iftype) {
868 #ifdef CONFIG_CFG80211_WEXT
869 case NL80211_IFTYPE_ADHOC:
870 cfg80211_ibss_wext_join(rdev, wdev);
872 case NL80211_IFTYPE_STATION:
873 cfg80211_mgd_wext_connect(rdev, wdev);
876 #ifdef CONFIG_MAC80211_MESH
877 case NL80211_IFTYPE_MESH_POINT:
879 /* backward compat code... */
880 struct mesh_setup setup;
881 memcpy(&setup, &default_mesh_setup,
883 /* back compat only needed for mesh_id */
884 setup.mesh_id = wdev->ssid;
885 setup.mesh_id_len = wdev->mesh_id_up_len;
886 if (wdev->mesh_id_up_len)
887 __cfg80211_join_mesh(rdev, dev,
889 &default_mesh_config);
900 * Configure power management to the driver here so that its
901 * correctly set also after interface type changes etc.
903 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
904 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
905 rdev->ops->set_power_mgmt)
906 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
908 /* assume this means it's off */
912 case NETDEV_UNREGISTER:
914 * It is possible to get NETDEV_UNREGISTER
915 * multiple times. To detect that, check
916 * that the interface is still on the list
917 * of registered interfaces, and only then
918 * remove and clean it up.
920 if (!list_empty(&wdev->list)) {
921 sysfs_remove_link(&dev->dev.kobj, "phy80211");
922 list_del_rcu(&wdev->list);
923 rdev->devlist_generation++;
924 cfg80211_mlme_purge_registrations(wdev);
925 #ifdef CONFIG_CFG80211_WEXT
926 kfree(wdev->wext.keys);
930 * synchronise (so that we won't find this netdev
931 * from other code any more) and then clear the list
932 * head so that the above code can safely check for
933 * !list_empty() to avoid double-cleanup.
936 INIT_LIST_HEAD(&wdev->list);
938 * Ensure that all events have been processed and
941 cfg80211_process_wdev_events(wdev);
944 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
945 return notifier_from_errno(-EOPNOTSUPP);
946 if (rfkill_blocked(rdev->rfkill))
947 return notifier_from_errno(-ERFKILL);
948 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
950 return notifier_from_errno(ret);
957 static struct notifier_block cfg80211_netdev_notifier = {
958 .notifier_call = cfg80211_netdev_notifier_call,
961 static void __net_exit cfg80211_pernet_exit(struct net *net)
963 struct cfg80211_registered_device *rdev;
966 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
967 if (net_eq(wiphy_net(&rdev->wiphy), net))
968 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
973 static struct pernet_operations cfg80211_pernet_ops = {
974 .exit = cfg80211_pernet_exit,
977 static int __init cfg80211_init(void)
981 err = register_pernet_device(&cfg80211_pernet_ops);
983 goto out_fail_pernet;
985 err = wiphy_sysfs_init();
989 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
991 goto out_fail_notifier;
993 err = nl80211_init();
995 goto out_fail_nl80211;
997 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
999 err = regulatory_init();
1003 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1014 debugfs_remove(ieee80211_debugfs_dir);
1016 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1020 unregister_pernet_device(&cfg80211_pernet_ops);
1024 subsys_initcall(cfg80211_init);
1026 static void __exit cfg80211_exit(void)
1028 debugfs_remove(ieee80211_debugfs_dir);
1030 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1033 unregister_pernet_device(&cfg80211_pernet_ops);
1034 destroy_workqueue(cfg80211_wq);
1036 module_exit(cfg80211_exit);