blob: 2a0bbd22854bd97b377139200f9e6b5e0ec2662f [file] [log] [blame]
Johannes Berg704232c2007-04-23 12:20:05 -07001/*
2 * This is the linux wireless configuration interface.
3 *
Johannes Berg5f2aa252010-01-17 15:49:02 +01004 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
Johannes Berg2740f0c2014-09-03 15:24:58 +03005 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berg704232c2007-04-23 12:20:05 -07006 */
7
Joe Perchese9c02682010-11-16 19:56:49 -08008#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
Johannes Berg704232c2007-04-23 12:20:05 -070010#include <linux/if.h>
11#include <linux/module.h>
12#include <linux/err.h>
Johannes Berg704232c2007-04-23 12:20:05 -070013#include <linux/list.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Johannes Berg704232c2007-04-23 12:20:05 -070015#include <linux/nl80211.h>
16#include <linux/debugfs.h>
17#include <linux/notifier.h>
18#include <linux/device.h>
Zhu Yi16a832e2009-08-19 16:08:22 +080019#include <linux/etherdevice.h>
Johannes Berg1f87f7d2009-06-02 13:01:41 +020020#include <linux/rtnetlink.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040021#include <linux/sched.h>
Johannes Berg704232c2007-04-23 12:20:05 -070022#include <net/genetlink.h>
23#include <net/cfg80211.h>
Johannes Berg55682962007-09-20 13:09:35 -040024#include "nl80211.h"
Johannes Berg704232c2007-04-23 12:20:05 -070025#include "core.h"
26#include "sysfs.h"
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040027#include "debugfs.h"
Johannes Berga9a11622009-07-27 12:01:53 +020028#include "wext-compat.h"
Hila Gonene35e4d22012-06-27 17:19:42 +030029#include "rdev-ops.h"
Johannes Berg704232c2007-04-23 12:20:05 -070030
31/* name for sysfs, %d is appended */
32#define PHY_NAME "phy"
33
34MODULE_AUTHOR("Johannes Berg");
35MODULE_LICENSE("GPL");
36MODULE_DESCRIPTION("wireless configuration support");
Marcel Holtmannfb4e1562013-04-28 16:22:06 -070037MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
Johannes Berg704232c2007-04-23 12:20:05 -070038
Johannes Berg5fe231e2013-05-08 21:45:15 +020039/* RCU-protected (and RTNL for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020040LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020041int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050042
Johannes Berg704232c2007-04-23 12:20:05 -070043/* for debugfs */
44static struct dentry *ieee80211_debugfs_dir;
45
Alban Browaeyse60d7442009-11-25 15:13:00 +010046/* for the cleanup, scan and event works */
47struct workqueue_struct *cfg80211_wq;
48
Amitkumar Karwar40db6c72011-04-21 14:10:27 -070049static bool cfg80211_disable_40mhz_24ghz;
50module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
53
Johannes Berg79c97e92009-07-07 03:56:12 +020054struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040055{
Johannes Berg79c97e92009-07-07 03:56:12 +020056 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040057
Johannes Berg5fe231e2013-05-08 21:45:15 +020058 ASSERT_RTNL();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050059
Johannes Berg79c97e92009-07-07 03:56:12 +020060 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
62 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040063 break;
64 }
65 }
66
67 return result;
68}
69
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050070int get_wiphy_idx(struct wiphy *wiphy)
71{
Zhao, Gangf26cbf42014-04-21 12:53:03 +080072 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Bergf4173762012-12-03 18:23:37 +010073
Johannes Berg79c97e92009-07-07 03:56:12 +020074 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050075}
76
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050077struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78{
Johannes Berg79c97e92009-07-07 03:56:12 +020079 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050080
Johannes Berg5fe231e2013-05-08 21:45:15 +020081 ASSERT_RTNL();
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050082
Johannes Berg79c97e92009-07-07 03:56:12 +020083 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
84 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050085 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020086 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050087}
88
Ben Greear1998d902014-10-22 12:23:00 -070089static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
90 const char *newname)
Johannes Berg55682962007-09-20 13:09:35 -040091{
Johannes Berg79c97e92009-07-07 03:56:12 +020092 struct cfg80211_registered_device *rdev2;
Ben Greear1998d902014-10-22 12:23:00 -070093 int wiphy_idx, taken = -1, digits;
Johannes Berg55682962007-09-20 13:09:35 -040094
Johannes Berg5fe231e2013-05-08 21:45:15 +020095 ASSERT_RTNL();
Eric W. Biederman2940bb62008-05-08 14:30:18 -070096
Johannes Berg76232252010-10-11 14:46:52 -040097 /* 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 */
101 digits = 1;
102 while (wiphy_idx /= 10)
103 digits++;
104 /*
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
107 */
108 if (taken == strlen(PHY_NAME) + digits)
109 return -EINVAL;
110 }
111
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700112 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200113 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
Ben Greear1998d902014-10-22 12:23:00 -0700114 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
Johannes Berg76232252010-10-11 14:46:52 -0400115 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700116
Ben Greear1998d902014-10-22 12:23:00 -0700117 return 0;
118}
119
120int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
121 char *newname)
122{
123 int result;
124
125 ASSERT_RTNL();
126
127 /* Ignore nop renames */
128 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
129 return 0;
130
131 result = cfg80211_dev_check_name(rdev, newname);
132 if (result < 0)
133 return result;
134
Johannes Berg55682962007-09-20 13:09:35 -0400135 result = device_rename(&rdev->wiphy.dev, newname);
136 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100137 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400138
Johannes Berg33c03602008-10-08 10:23:48 +0200139 if (rdev->wiphy.debugfsdir &&
140 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
Johannes Berg55682962007-09-20 13:09:35 -0400141 rdev->wiphy.debugfsdir,
142 rdev->wiphy.debugfsdir->d_parent,
143 newname))
Joe Perchese9c02682010-11-16 19:56:49 -0800144 pr_err("failed to rename debugfs dir to %s!\n", newname);
Johannes Berg55682962007-09-20 13:09:35 -0400145
Johannes Berg3bb20552014-05-26 13:52:25 +0200146 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
Johannes Berg55682962007-09-20 13:09:35 -0400147
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100148 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400149}
150
Johannes Berg463d0182009-07-14 00:33:35 +0200151int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
152 struct net *net)
153{
154 struct wireless_dev *wdev;
155 int err = 0;
156
Johannes Berg5be83de2009-11-19 00:56:28 +0100157 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200158 return -EOPNOTSUPP;
159
Johannes Berg89a54e42012-06-15 14:33:17 +0200160 list_for_each_entry(wdev, &rdev->wdev_list, list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200161 if (!wdev->netdev)
162 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200163 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
164 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
165 if (err)
166 break;
167 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
168 }
169
170 if (err) {
171 /* failed -- clean up to old netns */
172 net = wiphy_net(&rdev->wiphy);
173
Johannes Berg89a54e42012-06-15 14:33:17 +0200174 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
Johannes Berg463d0182009-07-14 00:33:35 +0200175 list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200176 if (!wdev->netdev)
177 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200178 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
179 err = dev_change_net_namespace(wdev->netdev, net,
180 "wlan%d");
181 WARN_ON(err);
182 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
183 }
Johannes Berg04600792010-08-05 17:45:15 +0200184
185 return err;
Johannes Berg463d0182009-07-14 00:33:35 +0200186 }
187
188 wiphy_net_set(&rdev->wiphy, net);
189
Johannes Berg04600792010-08-05 17:45:15 +0200190 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
191 WARN_ON(err);
192
193 return 0;
Johannes Berg463d0182009-07-14 00:33:35 +0200194}
195
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200196static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
197{
Johannes Berg79c97e92009-07-07 03:56:12 +0200198 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200199
Hila Gonene35e4d22012-06-27 17:19:42 +0300200 rdev_rfkill_poll(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200201}
202
Johannes Bergf9f47522013-03-19 15:04:07 +0100203void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
204 struct wireless_dev *wdev)
205{
Johannes Berg5fe231e2013-05-08 21:45:15 +0200206 ASSERT_RTNL();
Johannes Bergf9f47522013-03-19 15:04:07 +0100207
208 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
209 return;
210
211 if (!wdev->p2p_started)
212 return;
213
214 rdev_stop_p2p_device(rdev, wdev);
215 wdev->p2p_started = false;
216
217 rdev->opencount--;
218
Johannes Berga6173022014-01-22 11:14:18 +0200219 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
220 if (WARN_ON(!rdev->scan_req->notified))
221 rdev->scan_req->aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +0200222 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +0200223 }
Johannes Bergf9f47522013-03-19 15:04:07 +0100224}
225
Johannes Bergf6837ba82014-04-30 14:19:04 +0200226void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200227{
Johannes Bergf6837ba82014-04-30 14:19:04 +0200228 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200229 struct wireless_dev *wdev;
230
Johannes Bergf6837ba82014-04-30 14:19:04 +0200231 ASSERT_RTNL();
Johannes Bergf9f47522013-03-19 15:04:07 +0100232
Johannes Berg98104fde2012-06-16 00:19:54 +0200233 list_for_each_entry(wdev, &rdev->wdev_list, list) {
234 if (wdev->netdev) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200235 dev_close(wdev->netdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200236 continue;
237 }
238 /* otherwise, check iftype */
239 switch (wdev->iftype) {
240 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +0100241 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200242 break;
243 default:
244 break;
245 }
246 }
Johannes Bergf6837ba82014-04-30 14:19:04 +0200247}
248EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200249
Johannes Bergf6837ba82014-04-30 14:19:04 +0200250static int cfg80211_rfkill_set_block(void *data, bool blocked)
251{
252 struct cfg80211_registered_device *rdev = data;
253
254 if (!blocked)
255 return 0;
256
257 rtnl_lock();
258 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200259 rtnl_unlock();
260
261 return 0;
262}
263
264static void cfg80211_rfkill_sync_work(struct work_struct *work)
265{
Johannes Berg79c97e92009-07-07 03:56:12 +0200266 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200267
Johannes Berg79c97e92009-07-07 03:56:12 +0200268 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
269 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200270}
271
Johannes Berg667503d2009-07-07 03:56:11 +0200272static void cfg80211_event_work(struct work_struct *work)
273{
274 struct cfg80211_registered_device *rdev;
Johannes Berg667503d2009-07-07 03:56:11 +0200275
276 rdev = container_of(work, struct cfg80211_registered_device,
277 event_work);
278
279 rtnl_lock();
Johannes Berg3d54d252009-08-21 14:51:05 +0200280 cfg80211_process_rdev_events(rdev);
Johannes Berg667503d2009-07-07 03:56:11 +0200281 rtnl_unlock();
282}
283
Johannes Berg78f22b62014-03-24 17:57:27 +0100284void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
285{
286 struct cfg80211_iface_destroy *item;
287
288 ASSERT_RTNL();
289
290 spin_lock_irq(&rdev->destroy_list_lock);
291 while ((item = list_first_entry_or_null(&rdev->destroy_list,
292 struct cfg80211_iface_destroy,
293 list))) {
294 struct wireless_dev *wdev, *tmp;
295 u32 nlportid = item->nlportid;
296
297 list_del(&item->list);
298 kfree(item);
299 spin_unlock_irq(&rdev->destroy_list_lock);
300
301 list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
302 if (nlportid == wdev->owner_nlportid)
303 rdev_del_virtual_intf(rdev, wdev);
304 }
305
306 spin_lock_irq(&rdev->destroy_list_lock);
307 }
308 spin_unlock_irq(&rdev->destroy_list_lock);
309}
310
311static void cfg80211_destroy_iface_wk(struct work_struct *work)
312{
313 struct cfg80211_registered_device *rdev;
314
315 rdev = container_of(work, struct cfg80211_registered_device,
316 destroy_work);
317
318 rtnl_lock();
319 cfg80211_destroy_ifaces(rdev);
320 rtnl_unlock();
321}
322
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200323static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
324{
325 struct cfg80211_registered_device *rdev;
326
327 rdev = container_of(work, struct cfg80211_registered_device,
328 sched_scan_stop_wk);
329
330 rtnl_lock();
331
332 __cfg80211_stop_sched_scan(rdev, false);
333
334 rtnl_unlock();
335}
336
Johannes Berg704232c2007-04-23 12:20:05 -0700337/* exported functions */
338
Ben Greear1998d902014-10-22 12:23:00 -0700339struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
340 const char *requested_name)
Johannes Berg704232c2007-04-23 12:20:05 -0700341{
Johannes Berg73810b72013-05-08 21:49:02 +0200342 static atomic_t wiphy_counter = ATOMIC_INIT(0);
Johannes Berg76232252010-10-11 14:46:52 -0400343
344 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700345 int alloc_size;
346
Johannes Berg0b20633d2009-07-07 03:56:13 +0200347 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
348 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
349 WARN_ON(ops->connect && !ops->disconnect);
350 WARN_ON(ops->join_ibss && !ops->leave_ibss);
351 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
352 WARN_ON(ops->add_station && !ops->del_station);
353 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg29cbe682010-12-03 09:20:44 +0100354 WARN_ON(ops->join_mesh && !ops->leave_mesh);
Johannes Berg41ade002007-12-19 02:03:29 +0100355
Johannes Berg79c97e92009-07-07 03:56:12 +0200356 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700357
Johannes Berg79c97e92009-07-07 03:56:12 +0200358 rdev = kzalloc(alloc_size, GFP_KERNEL);
359 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700360 return NULL;
361
Johannes Berg79c97e92009-07-07 03:56:12 +0200362 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700363
Johannes Berg73810b72013-05-08 21:49:02 +0200364 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
Johannes Berga4d73ee2007-04-26 20:50:35 -0700365
Johannes Bergf4173762012-12-03 18:23:37 +0100366 if (unlikely(rdev->wiphy_idx < 0)) {
Johannes Berg76232252010-10-11 14:46:52 -0400367 /* ugh, wrapped! */
Johannes Berg73810b72013-05-08 21:49:02 +0200368 atomic_dec(&wiphy_counter);
Johannes Berg79c97e92009-07-07 03:56:12 +0200369 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700370 return NULL;
371 }
Johannes Berg704232c2007-04-23 12:20:05 -0700372
Johannes Berg9b881962013-06-04 22:23:36 +0200373 /* atomic_inc_return makes it start at 1, make it start at 0 */
374 rdev->wiphy_idx--;
375
Johannes Berg76232252010-10-11 14:46:52 -0400376 /* give it a proper name */
Ben Greear1998d902014-10-22 12:23:00 -0700377 if (requested_name && requested_name[0]) {
378 int rv;
379
380 rtnl_lock();
381 rv = cfg80211_dev_check_name(rdev, requested_name);
382
383 if (rv < 0) {
384 rtnl_unlock();
385 goto use_default_name;
386 }
387
388 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
389 rtnl_unlock();
390 if (rv)
391 goto use_default_name;
392 } else {
393use_default_name:
394 /* NOTE: This is *probably* safe w/out holding rtnl because of
395 * the restrictions on phy names. Probably this call could
396 * fail if some other part of the kernel (re)named a device
397 * phyX. But, might should add some locking and check return
398 * value, and use a different name if this one exists?
399 */
400 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
401 }
Johannes Berg76232252010-10-11 14:46:52 -0400402
Johannes Berg89a54e42012-06-15 14:33:17 +0200403 INIT_LIST_HEAD(&rdev->wdev_list);
Ben Greear37c73b52012-10-26 14:49:25 -0700404 INIT_LIST_HEAD(&rdev->beacon_registrations);
405 spin_lock_init(&rdev->beacon_registrations_lock);
Johannes Berg79c97e92009-07-07 03:56:12 +0200406 spin_lock_init(&rdev->bss_lock);
407 INIT_LIST_HEAD(&rdev->bss_list);
408 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Luciano Coelho807f8a82011-05-11 17:09:35 +0300409 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
Simon Wunderlich04f39042013-02-08 18:16:19 +0100410 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
411 cfg80211_dfs_channels_update_work);
Johannes Berg3d23e342009-09-29 23:27:28 +0200412#ifdef CONFIG_CFG80211_WEXT
413 rdev->wiphy.wext = &cfg80211_wext_handler;
414#endif
415
Johannes Berg79c97e92009-07-07 03:56:12 +0200416 device_initialize(&rdev->wiphy.dev);
417 rdev->wiphy.dev.class = &ieee80211_class;
418 rdev->wiphy.dev.platform_data = rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700419
Johannes Berg78f22b62014-03-24 17:57:27 +0100420 INIT_LIST_HEAD(&rdev->destroy_list);
421 spin_lock_init(&rdev->destroy_list_lock);
422 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200423 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
Johannes Berg78f22b62014-03-24 17:57:27 +0100424
Johannes Berg5be83de2009-11-19 00:56:28 +0100425#ifdef CONFIG_CFG80211_DEFAULT_PS
426 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
427#endif
Johannes Berg16cb9d42009-08-12 23:33:20 +0200428
Johannes Berg463d0182009-07-14 00:33:35 +0200429 wiphy_net_set(&rdev->wiphy, &init_net);
430
Johannes Berg79c97e92009-07-07 03:56:12 +0200431 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
432 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
433 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
434 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200435
Johannes Berg79c97e92009-07-07 03:56:12 +0200436 if (!rdev->rfkill) {
437 kfree(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200438 return NULL;
439 }
440
Johannes Berg79c97e92009-07-07 03:56:12 +0200441 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
442 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
443 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200444
Johannes Bergad002392009-08-18 19:51:57 +0200445 init_waitqueue_head(&rdev->dev_wait);
446
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200447 /*
448 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
449 * Fragmentation and RTS threshold are disabled by default with the
450 * special -1 value.
451 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200452 rdev->wiphy.retry_short = 7;
453 rdev->wiphy.retry_long = 4;
454 rdev->wiphy.frag_threshold = (u32) -1;
455 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100456 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200457
Andrei Otcheretianski9a774c72014-05-09 14:11:46 +0300458 rdev->wiphy.max_num_csa_counters = 1;
459
Johannes Berg79c97e92009-07-07 03:56:12 +0200460 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700461}
Ben Greear1998d902014-10-22 12:23:00 -0700462EXPORT_SYMBOL(wiphy_new_nm);
Johannes Berg704232c2007-04-23 12:20:05 -0700463
Johannes Berg7527a782011-05-13 10:58:57 +0200464static int wiphy_verify_combinations(struct wiphy *wiphy)
465{
466 const struct ieee80211_iface_combination *c;
467 int i, j;
468
Johannes Berg7527a782011-05-13 10:58:57 +0200469 for (i = 0; i < wiphy->n_iface_combinations; i++) {
470 u32 cnt = 0;
471 u16 all_iftypes = 0;
472
473 c = &wiphy->iface_combinations[i];
474
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100475 /*
476 * Combinations with just one interface aren't real,
477 * however we make an exception for DFS.
478 */
479 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
Johannes Berg7527a782011-05-13 10:58:57 +0200480 return -EINVAL;
481
482 /* Need at least one channel */
483 if (WARN_ON(!c->num_different_channels))
484 return -EINVAL;
485
Michal Kaziord4e50c52012-06-29 12:47:07 +0200486 /*
487 * Put a sane limit on maximum number of different
488 * channels to simplify channel accounting code.
489 */
490 if (WARN_ON(c->num_different_channels >
491 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
492 return -EINVAL;
493
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100494 /* DFS only works on one channel. */
495 if (WARN_ON(c->radar_detect_widths &&
496 (c->num_different_channels > 1)))
497 return -EINVAL;
498
Johannes Berg7527a782011-05-13 10:58:57 +0200499 if (WARN_ON(!c->n_limits))
500 return -EINVAL;
501
502 for (j = 0; j < c->n_limits; j++) {
503 u16 types = c->limits[j].types;
504
Luciano Coelhob6a55012014-02-27 11:07:21 +0200505 /* interface types shouldn't overlap */
Johannes Berg7527a782011-05-13 10:58:57 +0200506 if (WARN_ON(types & all_iftypes))
507 return -EINVAL;
508 all_iftypes |= types;
509
510 if (WARN_ON(!c->limits[j].max))
511 return -EINVAL;
512
513 /* Shouldn't list software iftypes in combinations! */
514 if (WARN_ON(wiphy->software_iftypes & types))
515 return -EINVAL;
516
Johannes Berg98104fde2012-06-16 00:19:54 +0200517 /* Only a single P2P_DEVICE can be allowed */
518 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
519 c->limits[j].max > 1))
520 return -EINVAL;
521
Johannes Berg7527a782011-05-13 10:58:57 +0200522 cnt += c->limits[j].max;
523 /*
524 * Don't advertise an unsupported type
525 * in a combination.
526 */
527 if (WARN_ON((wiphy->interface_modes & types) != types))
528 return -EINVAL;
529 }
530
531 /* You can't even choose that many! */
532 if (WARN_ON(cnt < c->max_interfaces))
533 return -EINVAL;
534 }
535
536 return 0;
537}
538
Johannes Berg704232c2007-04-23 12:20:05 -0700539int wiphy_register(struct wiphy *wiphy)
540{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800541 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700542 int res;
Johannes Berg8318d782008-01-24 19:38:38 +0100543 enum ieee80211_band band;
544 struct ieee80211_supported_band *sband;
545 bool have_band = false;
546 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700547 u16 ifmodes = wiphy->interface_modes;
548
Johannes Bergdfb89c52012-06-27 09:23:48 +0200549#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200550 if (WARN_ON(wiphy->wowlan &&
551 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
552 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
553 return -EINVAL;
554 if (WARN_ON(wiphy->wowlan &&
555 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
556 !wiphy->wowlan->tcp))
Johannes Berg77dbbb12011-07-13 10:48:55 +0200557 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200558#endif
Arik Nemtsov1057d352014-11-19 12:54:26 +0200559 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
560 (!rdev->ops->tdls_channel_switch ||
561 !rdev->ops->tdls_cancel_channel_switch)))
562 return -EINVAL;
Johannes Berg77dbbb12011-07-13 10:48:55 +0200563
Arik Nemtsovad932f02014-11-27 09:44:55 +0200564 /*
565 * if a wiphy has unsupported modes for regulatory channel enforcement,
566 * opt-out of enforcement checking
567 */
568 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
569 BIT(NL80211_IFTYPE_P2P_CLIENT) |
570 BIT(NL80211_IFTYPE_AP) |
571 BIT(NL80211_IFTYPE_P2P_GO) |
572 BIT(NL80211_IFTYPE_ADHOC) |
573 BIT(NL80211_IFTYPE_P2P_DEVICE) |
574 BIT(NL80211_IFTYPE_AP_VLAN) |
575 BIT(NL80211_IFTYPE_MONITOR)))
576 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
577
Jonathan Doronb0d7aa52014-12-15 19:26:00 +0200578 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
579 (wiphy->regulatory_flags &
580 (REGULATORY_CUSTOM_REG |
581 REGULATORY_STRICT_REG |
582 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
583 REGULATORY_COUNTRY_IE_IGNORE))))
584 return -EINVAL;
585
Amitkumar Karwarbe29b992013-06-28 11:51:26 -0700586 if (WARN_ON(wiphy->coalesce &&
587 (!wiphy->coalesce->n_rules ||
588 !wiphy->coalesce->n_patterns) &&
589 (!wiphy->coalesce->pattern_min_len ||
590 wiphy->coalesce->pattern_min_len >
591 wiphy->coalesce->pattern_max_len)))
592 return -EINVAL;
593
Johannes Berg562a7482011-11-07 12:39:33 +0100594 if (WARN_ON(wiphy->ap_sme_capa &&
595 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
596 return -EINVAL;
597
Johannes Bergef15aac2010-01-20 12:02:33 +0100598 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
599 return -EINVAL;
600
601 if (WARN_ON(wiphy->addresses &&
602 !is_zero_ether_addr(wiphy->perm_addr) &&
603 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
604 ETH_ALEN)))
605 return -EINVAL;
606
Vasanthakumar Thiagarajan77765ea2013-01-18 11:18:45 +0530607 if (WARN_ON(wiphy->max_acl_mac_addrs &&
608 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
609 !rdev->ops->set_mac_acl)))
610 return -EINVAL;
611
Johannes Bergef15aac2010-01-20 12:02:33 +0100612 if (wiphy->addresses)
613 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
614
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700615 /* sanity check ifmodes */
616 WARN_ON(!ifmodes);
Johannes Berg2e161f72010-08-12 15:38:38 +0200617 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700618 if (WARN_ON(ifmodes != wiphy->interface_modes))
619 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100620
Johannes Berg7527a782011-05-13 10:58:57 +0200621 res = wiphy_verify_combinations(wiphy);
622 if (res)
623 return res;
624
Johannes Berg8318d782008-01-24 19:38:38 +0100625 /* sanity check supported bands/channels */
626 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
627 sband = wiphy->bands[band];
628 if (!sband)
629 continue;
630
631 sband->band = band;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300632 if (WARN_ON(!sband->n_channels))
633 return -EINVAL;
634 /*
635 * on 60gHz band, there are no legacy rates, so
636 * n_bitrates is 0
637 */
638 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
639 !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100640 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100641
642 /*
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700643 * Since cfg80211_disable_40mhz_24ghz is global, we can
644 * modify the sband's ht data even if the driver uses a
645 * global structure for that.
646 */
647 if (cfg80211_disable_40mhz_24ghz &&
648 band == IEEE80211_BAND_2GHZ &&
649 sband->ht_cap.ht_supported) {
650 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
651 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
652 }
653
654 /*
Johannes Berg881d9482009-01-21 15:13:48 +0100655 * Since we use a u32 for rate bitmaps in
656 * ieee80211_get_response_rate, we cannot
657 * have more than 32 legacy rates.
658 */
659 if (WARN_ON(sband->n_bitrates > 32))
660 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100661
662 for (i = 0; i < sband->n_channels; i++) {
663 sband->channels[i].orig_flags =
664 sband->channels[i].flags;
Felix Fietkauc4a9faf2012-10-17 13:56:19 +0200665 sband->channels[i].orig_mag = INT_MAX;
Johannes Berg8318d782008-01-24 19:38:38 +0100666 sband->channels[i].orig_mpwr =
667 sband->channels[i].max_power;
668 sband->channels[i].band = band;
669 }
670
671 have_band = true;
672 }
673
674 if (!have_band) {
675 WARN_ON(1);
676 return -EINVAL;
677 }
678
Johannes Bergdfb89c52012-06-27 09:23:48 +0200679#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200680 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
681 (!rdev->wiphy.wowlan->pattern_min_len ||
682 rdev->wiphy.wowlan->pattern_min_len >
683 rdev->wiphy.wowlan->pattern_max_len)))
684 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200685#endif
Johannes Bergff1b6e62011-05-04 15:37:28 +0200686
Johannes Berg8318d782008-01-24 19:38:38 +0100687 /* check and set up bitrates */
688 ieee80211_set_bitrate_flags(wiphy);
689
Johannes Berg00c3a6e2013-10-26 17:14:38 +0200690 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
691
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200692 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200693 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400694 if (res) {
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200695 rtnl_unlock();
John W. Linvillec3d34d52010-08-30 17:36:40 -0400696 return res;
697 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200698
Johannes Berg2f0accc2009-06-10 16:50:29 +0200699 /* set up regulatory info */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700700 wiphy_regulatory_register(wiphy);
Johannes Berg2f0accc2009-06-10 16:50:29 +0200701
Johannes Berg5f2aa252010-01-17 15:49:02 +0100702 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200703 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700704
705 /* add to debugfs */
Johannes Berg79c97e92009-07-07 03:56:12 +0200706 rdev->wiphy.debugfsdir =
707 debugfs_create_dir(wiphy_name(&rdev->wiphy),
Johannes Berg704232c2007-04-23 12:20:05 -0700708 ieee80211_debugfs_dir);
Johannes Berg79c97e92009-07-07 03:56:12 +0200709 if (IS_ERR(rdev->wiphy.debugfsdir))
710 rdev->wiphy.debugfsdir = NULL;
Johannes Berg704232c2007-04-23 12:20:05 -0700711
Tomasz Bursztykaa796dac2014-08-13 16:04:51 +0300712 cfg80211_debugfs_rdev_add(rdev);
713 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
714
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +0100715 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400716 struct regulatory_request request;
717
718 request.wiphy_idx = get_wiphy_idx(wiphy);
719 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
720 request.alpha2[0] = '9';
721 request.alpha2[1] = '9';
722
723 nl80211_send_reg_change_event(&request);
724 }
725
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200726 rdev->wiphy.registered = true;
727 rtnl_unlock();
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200728
729 res = rfkill_register(rdev->rfkill);
730 if (res) {
731 rfkill_destroy(rdev->rfkill);
732 rdev->rfkill = NULL;
733 wiphy_unregister(&rdev->wiphy);
734 return res;
735 }
736
Johannes Berg2f0accc2009-06-10 16:50:29 +0200737 return 0;
Johannes Berg704232c2007-04-23 12:20:05 -0700738}
739EXPORT_SYMBOL(wiphy_register);
740
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200741void wiphy_rfkill_start_polling(struct wiphy *wiphy)
742{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800743 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200744
Johannes Berg79c97e92009-07-07 03:56:12 +0200745 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200746 return;
Johannes Berg79c97e92009-07-07 03:56:12 +0200747 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
748 rfkill_resume_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200749}
750EXPORT_SYMBOL(wiphy_rfkill_start_polling);
751
752void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
753{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800754 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200755
Johannes Berg79c97e92009-07-07 03:56:12 +0200756 rfkill_pause_polling(rdev->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200757}
758EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
759
Johannes Berg704232c2007-04-23 12:20:05 -0700760void wiphy_unregister(struct wiphy *wiphy)
761{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800762 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700763
Johannes Berg5fe231e2013-05-08 21:45:15 +0200764 wait_event(rdev->dev_wait, ({
765 int __count;
766 rtnl_lock();
767 __count = rdev->opencount;
768 rtnl_unlock();
769 __count == 0; }));
770
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200771 if (rdev->rfkill)
772 rfkill_unregister(rdev->rfkill);
Johannes Berg256c90d2013-06-04 19:21:08 +0200773
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200774 rtnl_lock();
Johannes Berg3bb20552014-05-26 13:52:25 +0200775 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200776 rdev->wiphy.registered = false;
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +0200777
Johannes Berg2fd05112014-04-29 17:52:36 +0200778 WARN_ON(!list_empty(&rdev->wdev_list));
Johannes Bergad002392009-08-18 19:51:57 +0200779
780 /*
781 * First remove the hardware from everywhere, this makes
782 * it impossible to find from userspace.
783 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +0100784 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +0100785 list_del_rcu(&rdev->list);
786 synchronize_rcu();
Johannes Bergf16bfc12007-04-26 20:51:12 -0700787
788 /*
Luis R. Rodriguezbfead082012-07-12 11:49:19 -0700789 * If this device got a regulatory hint tell core its
790 * free to listen now to a new shiny device regulatory hint
791 */
792 wiphy_regulatory_deregister(wiphy);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800793
Johannes Bergf5ea9122009-08-07 16:17:38 +0200794 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +0200795 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700796
Johannes Berg5fe231e2013-05-08 21:45:15 +0200797 rtnl_unlock();
Johannes Berg66825882009-07-13 13:24:44 +0200798
Johannes Berg36e6fea2009-08-12 22:21:21 +0200799 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +0200800 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +0200801 flush_work(&rdev->event_work);
Simon Wunderlich04f39042013-02-08 18:16:19 +0100802 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
Johannes Berg78f22b62014-03-24 17:57:27 +0100803 flush_work(&rdev->destroy_work);
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200804 flush_work(&rdev->sched_scan_stop_wk);
Johannes Berg6d525632012-04-04 15:05:25 +0200805
Johannes Berg6abb9cb2013-05-15 09:30:07 +0200806#ifdef CONFIG_PM
807 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
Hila Gonene35e4d22012-06-27 17:19:42 +0300808 rdev_set_wakeup(rdev, false);
Johannes Berg6abb9cb2013-05-15 09:30:07 +0200809#endif
Johannes Berg6d525632012-04-04 15:05:25 +0200810 cfg80211_rdev_free_wowlan(rdev);
Amitkumar Karwarbe29b992013-06-28 11:51:26 -0700811 cfg80211_rdev_free_coalesce(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700812}
813EXPORT_SYMBOL(wiphy_unregister);
814
Johannes Berg79c97e92009-07-07 03:56:12 +0200815void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700816{
Johannes Berg2a519312009-02-10 21:25:55 +0100817 struct cfg80211_internal_bss *scan, *tmp;
Ben Greear37c73b52012-10-26 14:49:25 -0700818 struct cfg80211_beacon_registration *reg, *treg;
Johannes Berg79c97e92009-07-07 03:56:12 +0200819 rfkill_destroy(rdev->rfkill);
Ben Greear37c73b52012-10-26 14:49:25 -0700820 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
821 list_del(&reg->list);
822 kfree(reg);
823 }
Johannes Berg79c97e92009-07-07 03:56:12 +0200824 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg5b112d32013-02-01 01:49:58 +0100825 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
Johannes Berg79c97e92009-07-07 03:56:12 +0200826 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700827}
828
829void wiphy_free(struct wiphy *wiphy)
830{
831 put_device(&wiphy->dev);
832}
833EXPORT_SYMBOL(wiphy_free);
834
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200835void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
836{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800837 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200838
Johannes Berg79c97e92009-07-07 03:56:12 +0200839 if (rfkill_set_hw_state(rdev->rfkill, blocked))
840 schedule_work(&rdev->rfkill_sync);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200841}
842EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
843
Johannes Berg98104fde2012-06-16 00:19:54 +0200844void cfg80211_unregister_wdev(struct wireless_dev *wdev)
845{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800846 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
Johannes Berg98104fde2012-06-16 00:19:54 +0200847
848 ASSERT_RTNL();
849
850 if (WARN_ON(wdev->netdev))
851 return;
852
Johannes Berg98104fde2012-06-16 00:19:54 +0200853 list_del_rcu(&wdev->list);
854 rdev->devlist_generation++;
855
856 switch (wdev->iftype) {
857 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +0100858 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200859 break;
860 default:
861 WARN_ON_ONCE(1);
862 break;
863 }
Johannes Berg98104fde2012-06-16 00:19:54 +0200864}
865EXPORT_SYMBOL(cfg80211_unregister_wdev);
866
Johannes Bergf1e3d552014-01-21 00:00:56 +0100867static const struct device_type wiphy_type = {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000868 .name = "wlan",
869};
870
Michal Kaziordbbae262012-06-29 12:47:01 +0200871void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
872 enum nl80211_iftype iftype, int num)
873{
Johannes Bergc5a7e582012-07-04 13:28:18 +0200874 ASSERT_RTNL();
Michal Kaziordbbae262012-06-29 12:47:01 +0200875
876 rdev->num_running_ifaces += num;
877 if (iftype == NL80211_IFTYPE_MONITOR)
878 rdev->num_running_monitor_ifaces += num;
Michal Kaziordbbae262012-06-29 12:47:01 +0200879}
880
Michal Kaziorf04c2202014-04-09 15:11:01 +0200881void __cfg80211_leave(struct cfg80211_registered_device *rdev,
882 struct wireless_dev *wdev)
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100883{
884 struct net_device *dev = wdev->netdev;
Jukka Rissanen31a60ed2014-12-15 13:25:38 +0200885 struct cfg80211_sched_scan_request *sched_scan_req;
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100886
Barak Bercovitz24d584d2013-12-05 11:21:26 +0200887 ASSERT_RTNL();
Michal Kaziorf04c2202014-04-09 15:11:01 +0200888 ASSERT_WDEV_LOCK(wdev);
Barak Bercovitz24d584d2013-12-05 11:21:26 +0200889
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100890 switch (wdev->iftype) {
891 case NL80211_IFTYPE_ADHOC:
Michal Kaziorf04c2202014-04-09 15:11:01 +0200892 __cfg80211_leave_ibss(rdev, dev, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100893 break;
894 case NL80211_IFTYPE_P2P_CLIENT:
895 case NL80211_IFTYPE_STATION:
Jukka Rissanen31a60ed2014-12-15 13:25:38 +0200896 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
897 if (sched_scan_req && dev == sched_scan_req->dev)
Barak Bercovitz24d584d2013-12-05 11:21:26 +0200898 __cfg80211_stop_sched_scan(rdev, false);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100899
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100900#ifdef CONFIG_CFG80211_WEXT
901 kfree(wdev->wext.ie);
902 wdev->wext.ie = NULL;
903 wdev->wext.ie_len = 0;
904 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
905#endif
Johannes Berg83739b02013-05-15 17:44:01 +0200906 cfg80211_disconnect(rdev, dev,
907 WLAN_REASON_DEAUTH_LEAVING, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100908 break;
909 case NL80211_IFTYPE_MESH_POINT:
Michal Kaziorf04c2202014-04-09 15:11:01 +0200910 __cfg80211_leave_mesh(rdev, dev);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100911 break;
912 case NL80211_IFTYPE_AP:
Johannes Berg74418ed2013-07-30 10:11:25 +0200913 case NL80211_IFTYPE_P2P_GO:
Michal Kaziorf04c2202014-04-09 15:11:01 +0200914 __cfg80211_stop_ap(rdev, dev, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100915 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +0100916 case NL80211_IFTYPE_OCB:
917 __cfg80211_leave_ocb(rdev, dev);
918 break;
Johannes Bergde4fcba2014-10-31 14:16:12 +0100919 case NL80211_IFTYPE_WDS:
920 /* must be handled by mac80211/driver, has no APIs */
921 break;
922 case NL80211_IFTYPE_P2P_DEVICE:
923 /* cannot happen, has no netdev */
924 break;
925 case NL80211_IFTYPE_AP_VLAN:
926 case NL80211_IFTYPE_MONITOR:
927 /* nothing to do */
928 break;
929 case NL80211_IFTYPE_UNSPECIFIED:
930 case NUM_NL80211_IFTYPES:
931 /* invalid */
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100932 break;
933 }
Stanislaw Gruszka81256962013-02-28 10:55:25 +0100934}
935
Michal Kaziorf04c2202014-04-09 15:11:01 +0200936void cfg80211_leave(struct cfg80211_registered_device *rdev,
937 struct wireless_dev *wdev)
938{
939 wdev_lock(wdev);
940 __cfg80211_leave(rdev, wdev);
941 wdev_unlock(wdev);
942}
943
944void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
945 gfp_t gfp)
946{
947 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
948 struct cfg80211_event *ev;
949 unsigned long flags;
950
951 trace_cfg80211_stop_iface(wiphy, wdev);
952
953 ev = kzalloc(sizeof(*ev), gfp);
954 if (!ev)
955 return;
956
957 ev->type = EVENT_STOPPED;
958
959 spin_lock_irqsave(&wdev->event_lock, flags);
960 list_add_tail(&ev->list, &wdev->event_list);
961 spin_unlock_irqrestore(&wdev->event_lock, flags);
962 queue_work(cfg80211_wq, &rdev->event_work);
963}
964EXPORT_SYMBOL(cfg80211_stop_iface);
965
Cristian Chilipireac4f60842012-05-08 12:38:53 +0300966static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
Jiri Pirko351638e2013-05-28 01:30:21 +0000967 unsigned long state, void *ptr)
Johannes Berg704232c2007-04-23 12:20:05 -0700968{
Jiri Pirko351638e2013-05-28 01:30:21 +0000969 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Johannes Berg2a783c12009-07-01 21:26:45 +0200970 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -0700971 struct cfg80211_registered_device *rdev;
Jukka Rissanen31a60ed2014-12-15 13:25:38 +0200972 struct cfg80211_sched_scan_request *sched_scan_req;
Johannes Berg704232c2007-04-23 12:20:05 -0700973
Johannes Berg2a783c12009-07-01 21:26:45 +0200974 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200975 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -0700976
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800977 rdev = wiphy_to_rdev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700978
Johannes Berg2a783c12009-07-01 21:26:45 +0200979 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +0200980
Johannes Berg704232c2007-04-23 12:20:05 -0700981 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +0000982 case NETDEV_POST_INIT:
983 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
984 break;
Johannes Berg704232c2007-04-23 12:20:05 -0700985 case NETDEV_REGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +0200986 /*
987 * NB: cannot take rdev->mtx here because this may be
988 * called within code protected by it when interfaces
989 * are added with nl80211.
990 */
Johannes Berg667503d2009-07-07 03:56:11 +0200991 mutex_init(&wdev->mtx);
992 INIT_LIST_HEAD(&wdev->event_list);
993 spin_lock_init(&wdev->event_lock);
Johannes Berg2e161f72010-08-12 15:38:38 +0200994 INIT_LIST_HEAD(&wdev->mgmt_registrations);
995 spin_lock_init(&wdev->mgmt_registrations_lock);
Jouni Malinen026331c2010-02-15 12:53:10 +0200996
Johannes Berg89a54e42012-06-15 14:33:17 +0200997 wdev->identifier = ++rdev->wdev_id;
998 list_add_rcu(&wdev->list, &rdev->wdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200999 rdev->devlist_generation++;
Johannes Berg463d0182009-07-14 00:33:35 +02001000 /* can only change netns with wiphy */
1001 dev->features |= NETIF_F_NETNS_LOCAL;
1002
Johannes Berg704232c2007-04-23 12:20:05 -07001003 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1004 "phy80211")) {
Joe Perchese9c02682010-11-16 19:56:49 -08001005 pr_err("failed to add phy80211 symlink to netdev!\n");
Johannes Berg704232c2007-04-23 12:20:05 -07001006 }
Johannes Berg2a783c12009-07-01 21:26:45 +02001007 wdev->netdev = dev;
Johannes Berg3d23e342009-09-29 23:27:28 +02001008#ifdef CONFIG_CFG80211_WEXT
Johannes Berg2a783c12009-07-01 21:26:45 +02001009 wdev->wext.default_key = -1;
1010 wdev->wext.default_mgmt_key = -1;
Johannes Bergf2129352009-07-01 21:26:56 +02001011 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
Kalle Valoffb9eb32010-02-17 17:58:10 +02001012#endif
1013
Johannes Berg5be83de2009-11-19 00:56:28 +01001014 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
Kalle Valoffb9eb32010-02-17 17:58:10 +02001015 wdev->ps = true;
Johannes Berg5be83de2009-11-19 00:56:28 +01001016 else
Kalle Valoffb9eb32010-02-17 17:58:10 +02001017 wdev->ps = false;
Juuso Oikarinen9043f3b2010-04-27 12:47:41 +03001018 /* allow mac80211 to determine the timeout */
1019 wdev->ps_timeout = -1;
Kalle Valoffb9eb32010-02-17 17:58:10 +02001020
Johannes Bergad4bb6f2009-11-19 00:56:30 +01001021 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
Johannes Berg074ac8d2010-09-16 14:58:22 +02001022 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
Johannes Bergad4bb6f2009-11-19 00:56:30 +01001023 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1024 dev->priv_flags |= IFF_DONT_BRIDGE;
Johannes Berg704232c2007-04-23 12:20:05 -07001025 break;
Johannes Berg04a773a2009-04-19 21:24:32 +02001026 case NETDEV_GOING_DOWN:
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001027 cfg80211_leave(rdev, wdev);
Johannes Berg01a0ac42009-08-20 21:36:16 +02001028 break;
1029 case NETDEV_DOWN:
Michal Kaziordbbae262012-06-29 12:47:01 +02001030 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
Johannes Berga6173022014-01-22 11:14:18 +02001031 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1032 if (WARN_ON(!rdev->scan_req->notified))
1033 rdev->scan_req->aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +02001034 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +02001035 }
Johannes Berg5fe231e2013-05-08 21:45:15 +02001036
Jukka Rissanen31a60ed2014-12-15 13:25:38 +02001037 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1038 if (WARN_ON(sched_scan_req &&
1039 sched_scan_req->dev == wdev->netdev)) {
Johannes Berg5fe231e2013-05-08 21:45:15 +02001040 __cfg80211_stop_sched_scan(rdev, false);
1041 }
1042
1043 rdev->opencount--;
1044 wake_up(&rdev->dev_wait);
Johannes Berg04a773a2009-04-19 21:24:32 +02001045 break;
1046 case NETDEV_UP:
Johannes Berg4290cb42012-07-12 22:19:48 +02001047 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
Johannes Berg667503d2009-07-07 03:56:11 +02001048 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +02001049 switch (wdev->iftype) {
Johannes Berg29cbe682010-12-03 09:20:44 +01001050#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +02001051 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +02001052 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +02001053 break;
Johannes Bergf2129352009-07-01 21:26:56 +02001054 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +02001055 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +02001056 break;
Johannes Berg29cbe682010-12-03 09:20:44 +01001057#endif
Javier Cardonac80d5452010-12-16 17:37:49 -08001058#ifdef CONFIG_MAC80211_MESH
Johannes Berg29cbe682010-12-03 09:20:44 +01001059 case NL80211_IFTYPE_MESH_POINT:
Javier Cardonac80d5452010-12-16 17:37:49 -08001060 {
1061 /* backward compat code... */
1062 struct mesh_setup setup;
1063 memcpy(&setup, &default_mesh_setup,
1064 sizeof(setup));
1065 /* back compat only needed for mesh_id */
1066 setup.mesh_id = wdev->ssid;
1067 setup.mesh_id_len = wdev->mesh_id_up_len;
1068 if (wdev->mesh_id_up_len)
1069 __cfg80211_join_mesh(rdev, dev,
1070 &setup,
1071 &default_mesh_config);
1072 break;
1073 }
1074#endif
Johannes Bergf2129352009-07-01 21:26:56 +02001075 default:
1076 break;
1077 }
Johannes Berg667503d2009-07-07 03:56:11 +02001078 wdev_unlock(wdev);
Johannes Bergad002392009-08-18 19:51:57 +02001079 rdev->opencount++;
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +02001080
1081 /*
1082 * Configure power management to the driver here so that its
1083 * correctly set also after interface type changes etc.
1084 */
Eliad Peller5966f2d2011-07-19 12:57:13 +03001085 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1086 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +02001087 rdev->ops->set_power_mgmt)
Hila Gonene35e4d22012-06-27 17:19:42 +03001088 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1089 wdev->ps_timeout)) {
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +02001090 /* assume this means it's off */
1091 wdev->ps = false;
1092 }
Johannes Berg2a783c12009-07-01 21:26:45 +02001093 break;
Johannes Berg704232c2007-04-23 12:20:05 -07001094 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +02001095 /*
Johannes Berge40cbda2009-07-30 14:04:01 +02001096 * It is possible to get NETDEV_UNREGISTER
1097 * multiple times. To detect that, check
1098 * that the interface is still on the list
1099 * of registered interfaces, and only then
1100 * remove and clean it up.
1101 */
Johannes Berg2a783c12009-07-01 21:26:45 +02001102 if (!list_empty(&wdev->list)) {
Johannes Berg704232c2007-04-23 12:20:05 -07001103 sysfs_remove_link(&dev->dev.kobj, "phy80211");
Johannes Berg5f2aa252010-01-17 15:49:02 +01001104 list_del_rcu(&wdev->list);
Johannes Bergf5ea9122009-08-07 16:17:38 +02001105 rdev->devlist_generation++;
Johannes Berg2e161f72010-08-12 15:38:38 +02001106 cfg80211_mlme_purge_registrations(wdev);
Johannes Berg3d23e342009-09-29 23:27:28 +02001107#ifdef CONFIG_CFG80211_WEXT
Johannes Berg538c9eb2014-09-10 13:39:56 +03001108 kzfree(wdev->wext.keys);
Johannes Berge40cbda2009-07-30 14:04:01 +02001109#endif
Johannes Berg704232c2007-04-23 12:20:05 -07001110 }
Johannes Berg5f2aa252010-01-17 15:49:02 +01001111 /*
1112 * synchronise (so that we won't find this netdev
1113 * from other code any more) and then clear the list
1114 * head so that the above code can safely check for
1115 * !list_empty() to avoid double-cleanup.
1116 */
1117 synchronize_rcu();
1118 INIT_LIST_HEAD(&wdev->list);
Daniel Drake1f6fc432012-08-02 18:41:48 +01001119 /*
1120 * Ensure that all events have been processed and
1121 * freed.
1122 */
1123 cfg80211_process_wdev_events(wdev);
Ben Greearf9bef3d2013-06-19 14:06:26 -07001124
1125 if (WARN_ON(wdev->current_bss)) {
1126 cfg80211_unhold_bss(wdev->current_bss);
1127 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1128 wdev->current_bss = NULL;
1129 }
Johannes Berg704232c2007-04-23 12:20:05 -07001130 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001131 case NETDEV_PRE_UP:
Johannes Berg0b20633d2009-07-07 03:56:13 +02001132 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1133 return notifier_from_errno(-EOPNOTSUPP);
Luciano Coelhob6a55012014-02-27 11:07:21 +02001134 if (rfkill_blocked(rdev->rfkill))
1135 return notifier_from_errno(-ERFKILL);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001136 break;
Zhao, Gang6784c7d2014-04-21 12:53:04 +08001137 default:
1138 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -07001139 }
1140
Zhao, Gang6784c7d2014-04-21 12:53:04 +08001141 return NOTIFY_OK;
Johannes Berg704232c2007-04-23 12:20:05 -07001142}
1143
1144static struct notifier_block cfg80211_netdev_notifier = {
1145 .notifier_call = cfg80211_netdev_notifier_call,
1146};
1147
Johannes Berg463d0182009-07-14 00:33:35 +02001148static void __net_exit cfg80211_pernet_exit(struct net *net)
1149{
1150 struct cfg80211_registered_device *rdev;
1151
1152 rtnl_lock();
Johannes Berg463d0182009-07-14 00:33:35 +02001153 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1154 if (net_eq(wiphy_net(&rdev->wiphy), net))
1155 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1156 }
Johannes Berg463d0182009-07-14 00:33:35 +02001157 rtnl_unlock();
1158}
1159
1160static struct pernet_operations cfg80211_pernet_ops = {
1161 .exit = cfg80211_pernet_exit,
1162};
1163
1164static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001165{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001166 int err;
1167
Johannes Berg463d0182009-07-14 00:33:35 +02001168 err = register_pernet_device(&cfg80211_pernet_ops);
1169 if (err)
1170 goto out_fail_pernet;
1171
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001172 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -07001173 if (err)
1174 goto out_fail_sysfs;
1175
1176 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1177 if (err)
1178 goto out_fail_notifier;
1179
Johannes Berg55682962007-09-20 13:09:35 -04001180 err = nl80211_init();
1181 if (err)
1182 goto out_fail_nl80211;
1183
Johannes Berg704232c2007-04-23 12:20:05 -07001184 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1185
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001186 err = regulatory_init();
1187 if (err)
1188 goto out_fail_reg;
1189
Alban Browaeyse60d7442009-11-25 15:13:00 +01001190 cfg80211_wq = create_singlethread_workqueue("cfg80211");
Wei Yongjunf00f1882013-03-20 20:22:54 +08001191 if (!cfg80211_wq) {
1192 err = -ENOMEM;
Alban Browaeyse60d7442009-11-25 15:13:00 +01001193 goto out_fail_wq;
Wei Yongjunf00f1882013-03-20 20:22:54 +08001194 }
Alban Browaeyse60d7442009-11-25 15:13:00 +01001195
Johannes Berg704232c2007-04-23 12:20:05 -07001196 return 0;
1197
Alban Browaeyse60d7442009-11-25 15:13:00 +01001198out_fail_wq:
1199 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001200out_fail_reg:
1201 debugfs_remove(ieee80211_debugfs_dir);
Junjie Mao81daf732015-01-28 10:03:26 +08001202 nl80211_exit();
Johannes Berg55682962007-09-20 13:09:35 -04001203out_fail_nl80211:
1204 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -07001205out_fail_notifier:
1206 wiphy_sysfs_exit();
1207out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +02001208 unregister_pernet_device(&cfg80211_pernet_ops);
1209out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -07001210 return err;
1211}
Johannes Berg3a462462007-09-10 13:44:45 +02001212subsys_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -07001213
Uwe Kleine-Königf884e382010-06-18 09:38:54 +02001214static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001215{
1216 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001217 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -07001218 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1219 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001220 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +02001221 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +01001222 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -07001223}
1224module_exit(cfg80211_exit);