2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/nl80211.h>
15 #include <linux/debugfs.h>
16 #include <linux/notifier.h>
17 #include <linux/device.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/sched.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
27 #include "wext-compat.h"
30 /* name for sysfs, %d is appended */
31 #define PHY_NAME "phy"
33 MODULE_AUTHOR("Johannes Berg");
34 MODULE_LICENSE("GPL");
35 MODULE_DESCRIPTION("wireless configuration support");
37 /* RCU-protected (and cfg80211_mutex for writers) */
38 LIST_HEAD(cfg80211_rdev_list);
39 int cfg80211_rdev_list_generation;
41 DEFINE_MUTEX(cfg80211_mutex);
44 static struct dentry *ieee80211_debugfs_dir;
46 /* for the cleanup, scan and event works */
47 struct workqueue_struct *cfg80211_wq;
49 static bool cfg80211_disable_40mhz_24ghz;
50 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
54 /* requires cfg80211_mutex to be held! */
55 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
57 struct cfg80211_registered_device *result = NULL, *rdev;
59 if (!wiphy_idx_valid(wiphy_idx))
62 assert_cfg80211_lock();
64 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
65 if (rdev->wiphy_idx == wiphy_idx) {
74 int get_wiphy_idx(struct wiphy *wiphy)
76 struct cfg80211_registered_device *rdev;
78 return WIPHY_IDX_STALE;
79 rdev = wiphy_to_dev(wiphy);
80 return rdev->wiphy_idx;
83 /* requires cfg80211_rdev_mutex to be held! */
84 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
86 struct cfg80211_registered_device *rdev;
88 if (!wiphy_idx_valid(wiphy_idx))
91 assert_cfg80211_lock();
93 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
99 /* requires cfg80211_mutex to be held! */
100 struct cfg80211_registered_device *
101 __cfg80211_rdev_from_info(struct genl_info *info)
104 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
105 struct net_device *dev;
108 assert_cfg80211_lock();
110 if (info->attrs[NL80211_ATTR_WIPHY]) {
111 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
112 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
116 if (info->attrs[NL80211_ATTR_IFINDEX]) {
117 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
118 dev = dev_get_by_index(genl_info_net(info), ifindex);
120 if (dev->ieee80211_ptr)
122 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
128 if (bywiphyidx && byifidx) {
129 if (bywiphyidx != byifidx)
130 return ERR_PTR(-EINVAL);
132 return bywiphyidx; /* == byifidx */
143 struct cfg80211_registered_device *
144 cfg80211_get_dev_from_info(struct genl_info *info)
146 struct cfg80211_registered_device *rdev;
148 mutex_lock(&cfg80211_mutex);
149 rdev = __cfg80211_rdev_from_info(info);
151 /* if it is not an error we grab the lock on
152 * it to assure it won't be going away while
153 * we operate on it */
155 mutex_lock(&rdev->mtx);
157 mutex_unlock(&cfg80211_mutex);
162 struct cfg80211_registered_device *
163 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
165 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
166 struct net_device *dev;
168 mutex_lock(&cfg80211_mutex);
169 dev = dev_get_by_index(net, ifindex);
172 if (dev->ieee80211_ptr) {
173 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
174 mutex_lock(&rdev->mtx);
176 rdev = ERR_PTR(-ENODEV);
179 mutex_unlock(&cfg80211_mutex);
183 /* requires cfg80211_mutex to be held */
184 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
187 struct cfg80211_registered_device *rdev2;
188 int wiphy_idx, taken = -1, result, digits;
190 assert_cfg80211_lock();
192 /* prohibit calling the thing phy%d when %d is not its number */
193 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
194 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
195 /* count number of places needed to print wiphy_idx */
197 while (wiphy_idx /= 10)
200 * deny the name if it is phy<idx> where <idx> is printed
201 * without leading zeroes. taken == strlen(newname) here
203 if (taken == strlen(PHY_NAME) + digits)
208 /* Ignore nop renames */
209 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
212 /* Ensure another device does not already have this name. */
213 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
214 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
217 result = device_rename(&rdev->wiphy.dev, newname);
221 if (rdev->wiphy.debugfsdir &&
222 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
223 rdev->wiphy.debugfsdir,
224 rdev->wiphy.debugfsdir->d_parent,
226 pr_err("failed to rename debugfs dir to %s!\n", newname);
228 nl80211_notify_dev_rename(rdev);
233 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
236 struct wireless_dev *wdev;
239 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
242 list_for_each_entry(wdev, &rdev->netdev_list, list) {
243 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
244 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
247 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
251 /* failed -- clean up to old netns */
252 net = wiphy_net(&rdev->wiphy);
254 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
256 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
257 err = dev_change_net_namespace(wdev->netdev, net,
260 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
266 wiphy_net_set(&rdev->wiphy, net);
268 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
274 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
276 struct cfg80211_registered_device *rdev = data;
278 rdev->ops->rfkill_poll(&rdev->wiphy);
281 static int cfg80211_rfkill_set_block(void *data, bool blocked)
283 struct cfg80211_registered_device *rdev = data;
284 struct wireless_dev *wdev;
290 mutex_lock(&rdev->devlist_mtx);
292 list_for_each_entry(wdev, &rdev->netdev_list, list)
293 dev_close(wdev->netdev);
295 mutex_unlock(&rdev->devlist_mtx);
301 static void cfg80211_rfkill_sync_work(struct work_struct *work)
303 struct cfg80211_registered_device *rdev;
305 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
306 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
309 static void cfg80211_event_work(struct work_struct *work)
311 struct cfg80211_registered_device *rdev;
313 rdev = container_of(work, struct cfg80211_registered_device,
317 cfg80211_lock_rdev(rdev);
319 cfg80211_process_rdev_events(rdev);
320 cfg80211_unlock_rdev(rdev);
324 /* exported functions */
326 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
328 static int wiphy_counter;
330 struct cfg80211_registered_device *rdev;
333 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
334 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
335 WARN_ON(ops->connect && !ops->disconnect);
336 WARN_ON(ops->join_ibss && !ops->leave_ibss);
337 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
338 WARN_ON(ops->add_station && !ops->del_station);
339 WARN_ON(ops->add_mpath && !ops->del_mpath);
340 WARN_ON(ops->join_mesh && !ops->leave_mesh);
342 alloc_size = sizeof(*rdev) + sizeof_priv;
344 rdev = kzalloc(alloc_size, GFP_KERNEL);
350 mutex_lock(&cfg80211_mutex);
352 rdev->wiphy_idx = wiphy_counter++;
354 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
356 mutex_unlock(&cfg80211_mutex);
362 mutex_unlock(&cfg80211_mutex);
364 /* give it a proper name */
365 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
367 mutex_init(&rdev->mtx);
368 mutex_init(&rdev->devlist_mtx);
369 mutex_init(&rdev->sched_scan_mtx);
370 INIT_LIST_HEAD(&rdev->netdev_list);
371 spin_lock_init(&rdev->bss_lock);
372 INIT_LIST_HEAD(&rdev->bss_list);
373 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
374 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
375 #ifdef CONFIG_CFG80211_WEXT
376 rdev->wiphy.wext = &cfg80211_wext_handler;
379 device_initialize(&rdev->wiphy.dev);
380 rdev->wiphy.dev.class = &ieee80211_class;
381 rdev->wiphy.dev.platform_data = rdev;
383 #ifdef CONFIG_CFG80211_DEFAULT_PS
384 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
387 wiphy_net_set(&rdev->wiphy, &init_net);
389 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
390 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
391 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
392 &rdev->rfkill_ops, rdev);
399 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
400 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
401 INIT_WORK(&rdev->event_work, cfg80211_event_work);
403 init_waitqueue_head(&rdev->dev_wait);
406 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
407 * Fragmentation and RTS threshold are disabled by default with the
410 rdev->wiphy.retry_short = 7;
411 rdev->wiphy.retry_long = 4;
412 rdev->wiphy.frag_threshold = (u32) -1;
413 rdev->wiphy.rts_threshold = (u32) -1;
414 rdev->wiphy.coverage_class = 0;
418 EXPORT_SYMBOL(wiphy_new);
420 static int wiphy_verify_combinations(struct wiphy *wiphy)
422 const struct ieee80211_iface_combination *c;
425 /* If we have combinations enforce them */
426 if (wiphy->n_iface_combinations)
427 wiphy->flags |= WIPHY_FLAG_ENFORCE_COMBINATIONS;
429 for (i = 0; i < wiphy->n_iface_combinations; i++) {
433 c = &wiphy->iface_combinations[i];
435 /* Combinations with just one interface aren't real */
436 if (WARN_ON(c->max_interfaces < 2))
439 /* Need at least one channel */
440 if (WARN_ON(!c->num_different_channels))
443 if (WARN_ON(!c->n_limits))
446 for (j = 0; j < c->n_limits; j++) {
447 u16 types = c->limits[j].types;
450 * interface types shouldn't overlap, this is
451 * used in cfg80211_can_change_interface()
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 cnt += c->limits[j].max;
466 * Don't advertise an unsupported type
469 if (WARN_ON((wiphy->interface_modes & types) != types))
473 /* You can't even choose that many! */
474 if (WARN_ON(cnt < c->max_interfaces))
481 int wiphy_register(struct wiphy *wiphy)
483 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
485 enum ieee80211_band band;
486 struct ieee80211_supported_band *sband;
487 bool have_band = false;
489 u16 ifmodes = wiphy->interface_modes;
491 if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
492 !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
495 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
498 if (WARN_ON(wiphy->addresses &&
499 !is_zero_ether_addr(wiphy->perm_addr) &&
500 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
504 if (wiphy->addresses)
505 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
507 /* sanity check ifmodes */
509 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
510 if (WARN_ON(ifmodes != wiphy->interface_modes))
511 wiphy->interface_modes = ifmodes;
513 res = wiphy_verify_combinations(wiphy);
517 /* sanity check supported bands/channels */
518 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
519 sband = wiphy->bands[band];
525 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
529 * Since cfg80211_disable_40mhz_24ghz is global, we can
530 * modify the sband's ht data even if the driver uses a
531 * global structure for that.
533 if (cfg80211_disable_40mhz_24ghz &&
534 band == IEEE80211_BAND_2GHZ &&
535 sband->ht_cap.ht_supported) {
536 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
537 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
541 * Since we use a u32 for rate bitmaps in
542 * ieee80211_get_response_rate, we cannot
543 * have more than 32 legacy rates.
545 if (WARN_ON(sband->n_bitrates > 32))
548 for (i = 0; i < sband->n_channels; i++) {
549 sband->channels[i].orig_flags =
550 sband->channels[i].flags;
551 sband->channels[i].orig_mag = INT_MAX;
552 sband->channels[i].orig_mpwr =
553 sband->channels[i].max_power;
554 sband->channels[i].band = band;
565 if (rdev->wiphy.wowlan.n_patterns) {
566 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
567 rdev->wiphy.wowlan.pattern_min_len >
568 rdev->wiphy.wowlan.pattern_max_len))
572 /* check and set up bitrates */
573 ieee80211_set_bitrate_flags(wiphy);
575 mutex_lock(&cfg80211_mutex);
577 res = device_add(&rdev->wiphy.dev);
579 mutex_unlock(&cfg80211_mutex);
583 /* set up regulatory info */
584 regulatory_update(wiphy, NL80211_REGDOM_SET_BY_CORE);
586 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
587 cfg80211_rdev_list_generation++;
590 rdev->wiphy.debugfsdir =
591 debugfs_create_dir(wiphy_name(&rdev->wiphy),
592 ieee80211_debugfs_dir);
593 if (IS_ERR(rdev->wiphy.debugfsdir))
594 rdev->wiphy.debugfsdir = NULL;
596 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
597 struct regulatory_request request;
599 request.wiphy_idx = get_wiphy_idx(wiphy);
600 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
601 request.alpha2[0] = '9';
602 request.alpha2[1] = '9';
604 nl80211_send_reg_change_event(&request);
607 cfg80211_debugfs_rdev_add(rdev);
608 mutex_unlock(&cfg80211_mutex);
611 * due to a locking dependency this has to be outside of the
612 * cfg80211_mutex lock
614 res = rfkill_register(rdev->rfkill);
619 rdev->wiphy.registered = true;
624 device_del(&rdev->wiphy.dev);
627 EXPORT_SYMBOL(wiphy_register);
629 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
631 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
633 if (!rdev->ops->rfkill_poll)
635 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
636 rfkill_resume_polling(rdev->rfkill);
638 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
640 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
642 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
644 rfkill_pause_polling(rdev->rfkill);
646 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
648 void wiphy_unregister(struct wiphy *wiphy)
650 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
653 rdev->wiphy.registered = false;
656 rfkill_unregister(rdev->rfkill);
658 /* protect the device list */
659 mutex_lock(&cfg80211_mutex);
661 wait_event(rdev->dev_wait, ({
663 mutex_lock(&rdev->devlist_mtx);
664 __count = rdev->opencount;
665 mutex_unlock(&rdev->devlist_mtx);
668 mutex_lock(&rdev->devlist_mtx);
669 BUG_ON(!list_empty(&rdev->netdev_list));
670 mutex_unlock(&rdev->devlist_mtx);
673 * First remove the hardware from everywhere, this makes
674 * it impossible to find from userspace.
676 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
677 list_del_rcu(&rdev->list);
681 * Try to grab rdev->mtx. If a command is still in progress,
682 * hopefully the driver will refuse it since it's tearing
683 * down the device already. We wait for this command to complete
684 * before unlinking the item from the list.
685 * Note: as codified by the BUG_ON above we cannot get here if
686 * a virtual interface is still present. Hence, we can only get
687 * to lock contention here if userspace issues a command that
688 * identified the hardware by wiphy index.
690 cfg80211_lock_rdev(rdev);
692 cfg80211_unlock_rdev(rdev);
694 /* If this device got a regulatory hint tell core its
695 * free to listen now to a new shiny device regulatory hint */
696 reg_device_remove(wiphy);
698 cfg80211_rdev_list_generation++;
699 device_del(&rdev->wiphy.dev);
701 mutex_unlock(&cfg80211_mutex);
703 flush_work(&rdev->scan_done_wk);
704 cancel_work_sync(&rdev->conn_work);
705 flush_work(&rdev->event_work);
707 EXPORT_SYMBOL(wiphy_unregister);
709 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
711 struct cfg80211_internal_bss *scan, *tmp;
712 rfkill_destroy(rdev->rfkill);
713 mutex_destroy(&rdev->mtx);
714 mutex_destroy(&rdev->devlist_mtx);
715 mutex_destroy(&rdev->sched_scan_mtx);
716 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
717 cfg80211_put_bss(&scan->pub);
718 cfg80211_rdev_free_wowlan(rdev);
722 void wiphy_free(struct wiphy *wiphy)
724 put_device(&wiphy->dev);
726 EXPORT_SYMBOL(wiphy_free);
728 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
730 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
732 if (rfkill_set_hw_state(rdev->rfkill, blocked))
733 schedule_work(&rdev->rfkill_sync);
735 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
737 static void wdev_cleanup_work(struct work_struct *work)
739 struct wireless_dev *wdev;
740 struct cfg80211_registered_device *rdev;
742 wdev = container_of(work, struct wireless_dev, cleanup_work);
743 rdev = wiphy_to_dev(wdev->wiphy);
745 cfg80211_lock_rdev(rdev);
747 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
748 rdev->scan_req->aborted = true;
749 ___cfg80211_scan_done(rdev, true);
752 cfg80211_unlock_rdev(rdev);
754 mutex_lock(&rdev->sched_scan_mtx);
756 if (WARN_ON(rdev->sched_scan_req &&
757 rdev->sched_scan_req->dev == wdev->netdev)) {
758 __cfg80211_stop_sched_scan(rdev, false);
761 mutex_unlock(&rdev->sched_scan_mtx);
763 mutex_lock(&rdev->devlist_mtx);
765 mutex_unlock(&rdev->devlist_mtx);
766 wake_up(&rdev->dev_wait);
768 dev_put(wdev->netdev);
771 static struct device_type wiphy_type = {
775 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
779 struct net_device *dev = ndev;
780 struct wireless_dev *wdev = dev->ieee80211_ptr;
781 struct cfg80211_registered_device *rdev;
787 rdev = wiphy_to_dev(wdev->wiphy);
789 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
792 case NETDEV_POST_INIT:
793 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
795 case NETDEV_REGISTER:
797 * NB: cannot take rdev->mtx here because this may be
798 * called within code protected by it when interfaces
799 * are added with nl80211.
801 mutex_init(&wdev->mtx);
802 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
803 INIT_LIST_HEAD(&wdev->event_list);
804 spin_lock_init(&wdev->event_lock);
805 INIT_LIST_HEAD(&wdev->mgmt_registrations);
806 spin_lock_init(&wdev->mgmt_registrations_lock);
808 mutex_lock(&rdev->devlist_mtx);
809 list_add_rcu(&wdev->list, &rdev->netdev_list);
810 rdev->devlist_generation++;
811 /* can only change netns with wiphy */
812 dev->features |= NETIF_F_NETNS_LOCAL;
814 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
816 pr_err("failed to add phy80211 symlink to netdev!\n");
819 wdev->sme_state = CFG80211_SME_IDLE;
820 mutex_unlock(&rdev->devlist_mtx);
821 #ifdef CONFIG_CFG80211_WEXT
822 wdev->wext.default_key = -1;
823 wdev->wext.default_mgmt_key = -1;
824 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
827 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
831 /* allow mac80211 to determine the timeout */
832 wdev->ps_timeout = -1;
834 if (!dev->ethtool_ops)
835 dev->ethtool_ops = &cfg80211_ethtool_ops;
837 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
838 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
839 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
840 dev->priv_flags |= IFF_DONT_BRIDGE;
842 case NETDEV_GOING_DOWN:
843 switch (wdev->iftype) {
844 case NL80211_IFTYPE_ADHOC:
845 cfg80211_leave_ibss(rdev, dev, true);
847 case NL80211_IFTYPE_P2P_CLIENT:
848 case NL80211_IFTYPE_STATION:
849 mutex_lock(&rdev->sched_scan_mtx);
850 __cfg80211_stop_sched_scan(rdev, false);
851 mutex_unlock(&rdev->sched_scan_mtx);
854 #ifdef CONFIG_CFG80211_WEXT
855 kfree(wdev->wext.ie);
856 wdev->wext.ie = NULL;
857 wdev->wext.ie_len = 0;
858 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
860 __cfg80211_disconnect(rdev, dev,
861 WLAN_REASON_DEAUTH_LEAVING, true);
862 cfg80211_mlme_down(rdev, dev);
865 case NL80211_IFTYPE_MESH_POINT:
866 cfg80211_leave_mesh(rdev, dev);
871 wdev->beacon_interval = 0;
875 queue_work(cfg80211_wq, &wdev->cleanup_work);
879 * If we have a really quick DOWN/UP succession we may
880 * have this work still pending ... cancel it and see
881 * if it was pending, in which case we need to account
882 * for some of the work it would have done.
884 if (cancel_work_sync(&wdev->cleanup_work)) {
885 mutex_lock(&rdev->devlist_mtx);
887 mutex_unlock(&rdev->devlist_mtx);
890 cfg80211_lock_rdev(rdev);
891 mutex_lock(&rdev->devlist_mtx);
893 switch (wdev->iftype) {
894 #ifdef CONFIG_CFG80211_WEXT
895 case NL80211_IFTYPE_ADHOC:
896 cfg80211_ibss_wext_join(rdev, wdev);
898 case NL80211_IFTYPE_STATION:
899 cfg80211_mgd_wext_connect(rdev, wdev);
902 #ifdef CONFIG_MAC80211_MESH
903 case NL80211_IFTYPE_MESH_POINT:
905 /* backward compat code... */
906 struct mesh_setup setup;
907 memcpy(&setup, &default_mesh_setup,
909 /* back compat only needed for mesh_id */
910 setup.mesh_id = wdev->ssid;
911 setup.mesh_id_len = wdev->mesh_id_up_len;
912 if (wdev->mesh_id_up_len)
913 __cfg80211_join_mesh(rdev, dev,
915 &default_mesh_config);
924 mutex_unlock(&rdev->devlist_mtx);
925 cfg80211_unlock_rdev(rdev);
928 * Configure power management to the driver here so that its
929 * correctly set also after interface type changes etc.
931 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
932 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
933 rdev->ops->set_power_mgmt)
934 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
937 /* assume this means it's off */
941 case NETDEV_UNREGISTER:
943 * NB: cannot take rdev->mtx here because this may be
944 * called within code protected by it when interfaces
945 * are removed with nl80211.
947 mutex_lock(&rdev->devlist_mtx);
949 * It is possible to get NETDEV_UNREGISTER
950 * multiple times. To detect that, check
951 * that the interface is still on the list
952 * of registered interfaces, and only then
953 * remove and clean it up.
955 if (!list_empty(&wdev->list)) {
956 sysfs_remove_link(&dev->dev.kobj, "phy80211");
957 list_del_rcu(&wdev->list);
958 rdev->devlist_generation++;
959 cfg80211_mlme_purge_registrations(wdev);
960 #ifdef CONFIG_CFG80211_WEXT
961 kfree(wdev->wext.keys);
964 mutex_unlock(&rdev->devlist_mtx);
966 * synchronise (so that we won't find this netdev
967 * from other code any more) and then clear the list
968 * head so that the above code can safely check for
969 * !list_empty() to avoid double-cleanup.
972 INIT_LIST_HEAD(&wdev->list);
974 * Ensure that all events have been processed and
977 cfg80211_process_wdev_events(wdev);
980 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
981 return notifier_from_errno(-EOPNOTSUPP);
982 if (rfkill_blocked(rdev->rfkill))
983 return notifier_from_errno(-ERFKILL);
984 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
986 return notifier_from_errno(ret);
992 wireless_nlevent_flush();
997 static struct notifier_block cfg80211_netdev_notifier = {
998 .notifier_call = cfg80211_netdev_notifier_call,
1001 static void __net_exit cfg80211_pernet_exit(struct net *net)
1003 struct cfg80211_registered_device *rdev;
1006 mutex_lock(&cfg80211_mutex);
1007 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1008 if (net_eq(wiphy_net(&rdev->wiphy), net))
1009 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1011 mutex_unlock(&cfg80211_mutex);
1015 static struct pernet_operations cfg80211_pernet_ops = {
1016 .exit = cfg80211_pernet_exit,
1019 static int __init cfg80211_init(void)
1023 err = register_pernet_device(&cfg80211_pernet_ops);
1025 goto out_fail_pernet;
1027 err = wiphy_sysfs_init();
1029 goto out_fail_sysfs;
1031 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1033 goto out_fail_notifier;
1035 err = nl80211_init();
1037 goto out_fail_nl80211;
1039 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1041 err = regulatory_init();
1045 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1054 debugfs_remove(ieee80211_debugfs_dir);
1056 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1060 unregister_pernet_device(&cfg80211_pernet_ops);
1064 subsys_initcall(cfg80211_init);
1066 static void __exit cfg80211_exit(void)
1068 debugfs_remove(ieee80211_debugfs_dir);
1070 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1073 unregister_pernet_device(&cfg80211_pernet_ops);
1074 destroy_workqueue(cfg80211_wq);
1076 module_exit(cfg80211_exit);