blob: 5b0c4d5b80cf5f61c006ac17eea29ceb481d6742 [file] [log] [blame]
Thomas Gleixner09c434b2019-05-19 13:08:20 +01001// SPDX-License-Identifier: GPL-2.0-only
Johannes Berg704232c2007-04-23 12:20:05 -07002/*
3 * This is the linux wireless configuration interface.
4 *
Johannes Berg5f2aa252010-01-17 15:49:02 +01005 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
Johannes Berg2740f0c2014-09-03 15:24:58 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Luca Coelhoc4cbaf72018-06-09 09:14:42 +03007 * Copyright 2015-2017 Intel Deutschland GmbH
Johannes Bergf0a6fd12022-02-01 14:09:51 +01008 * Copyright (C) 2018-2022 Intel Corporation
Johannes Berg704232c2007-04-23 12:20:05 -07009 */
10
Joe Perchese9c02682010-11-16 19:56:49 -080011#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
Johannes Berg704232c2007-04-23 12:20:05 -070013#include <linux/if.h>
14#include <linux/module.h>
15#include <linux/err.h>
Johannes Berg704232c2007-04-23 12:20:05 -070016#include <linux/list.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Johannes Berg704232c2007-04-23 12:20:05 -070018#include <linux/nl80211.h>
19#include <linux/debugfs.h>
20#include <linux/notifier.h>
21#include <linux/device.h>
Zhu Yi16a832e2009-08-19 16:08:22 +080022#include <linux/etherdevice.h>
Johannes Berg1f87f7d2009-06-02 13:01:41 +020023#include <linux/rtnetlink.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +040024#include <linux/sched.h>
Johannes Berg704232c2007-04-23 12:20:05 -070025#include <net/genetlink.h>
26#include <net/cfg80211.h>
Johannes Berg55682962007-09-20 13:09:35 -040027#include "nl80211.h"
Johannes Berg704232c2007-04-23 12:20:05 -070028#include "core.h"
29#include "sysfs.h"
Luis R. Rodriguez1ac61302009-05-02 00:37:21 -040030#include "debugfs.h"
Johannes Berga9a11622009-07-27 12:01:53 +020031#include "wext-compat.h"
Hila Gonene35e4d22012-06-27 17:19:42 +030032#include "rdev-ops.h"
Johannes Berg704232c2007-04-23 12:20:05 -070033
34/* name for sysfs, %d is appended */
35#define PHY_NAME "phy"
36
37MODULE_AUTHOR("Johannes Berg");
38MODULE_LICENSE("GPL");
39MODULE_DESCRIPTION("wireless configuration support");
Marcel Holtmannfb4e1562013-04-28 16:22:06 -070040MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
Johannes Berg704232c2007-04-23 12:20:05 -070041
Johannes Berg5fe231e2013-05-08 21:45:15 +020042/* RCU-protected (and RTNL for writers) */
Johannes Berg79c97e92009-07-07 03:56:12 +020043LIST_HEAD(cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +020044int cfg80211_rdev_list_generation;
Luis R. Rodrigueza1794392009-02-21 00:04:21 -050045
Johannes Berg704232c2007-04-23 12:20:05 -070046/* for debugfs */
47static struct dentry *ieee80211_debugfs_dir;
48
Alban Browaeyse60d7442009-11-25 15:13:00 +010049/* for the cleanup, scan and event works */
50struct workqueue_struct *cfg80211_wq;
51
Amitkumar Karwar40db6c72011-04-21 14:10:27 -070052static bool cfg80211_disable_40mhz_24ghz;
53module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
54MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
55 "Disable 40MHz support in the 2.4GHz band");
56
Johannes Berg79c97e92009-07-07 03:56:12 +020057struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
Johannes Berg55682962007-09-20 13:09:35 -040058{
Johannes Berg79c97e92009-07-07 03:56:12 +020059 struct cfg80211_registered_device *result = NULL, *rdev;
Johannes Berg55682962007-09-20 13:09:35 -040060
Johannes Berg5fe231e2013-05-08 21:45:15 +020061 ASSERT_RTNL();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -050062
Johannes Berg79c97e92009-07-07 03:56:12 +020063 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
64 if (rdev->wiphy_idx == wiphy_idx) {
65 result = rdev;
Johannes Berg55682962007-09-20 13:09:35 -040066 break;
67 }
68 }
69
70 return result;
71}
72
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050073int get_wiphy_idx(struct wiphy *wiphy)
74{
Zhao, Gangf26cbf42014-04-21 12:53:03 +080075 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Bergf4173762012-12-03 18:23:37 +010076
Johannes Berg79c97e92009-07-07 03:56:12 +020077 return rdev->wiphy_idx;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050078}
79
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050080struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
81{
Johannes Berg79c97e92009-07-07 03:56:12 +020082 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050083
Johannes Berg5fe231e2013-05-08 21:45:15 +020084 ASSERT_RTNL();
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050085
Johannes Berg79c97e92009-07-07 03:56:12 +020086 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
87 if (!rdev)
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050088 return NULL;
Johannes Berg79c97e92009-07-07 03:56:12 +020089 return &rdev->wiphy;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -050090}
91
Ben Greear1998d902014-10-22 12:23:00 -070092static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
93 const char *newname)
Johannes Berg55682962007-09-20 13:09:35 -040094{
Johannes Berg79c97e92009-07-07 03:56:12 +020095 struct cfg80211_registered_device *rdev2;
Ben Greear1998d902014-10-22 12:23:00 -070096 int wiphy_idx, taken = -1, digits;
Johannes Berg55682962007-09-20 13:09:35 -040097
Johannes Berg5fe231e2013-05-08 21:45:15 +020098 ASSERT_RTNL();
Eric W. Biederman2940bb62008-05-08 14:30:18 -070099
Johannes Berga7cfebc2018-04-03 14:33:49 +0200100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
101 return -EINVAL;
102
Johannes Berg76232252010-10-11 14:46:52 -0400103 /* prohibit calling the thing phy%d when %d is not its number */
104 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
105 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
106 /* count number of places needed to print wiphy_idx */
107 digits = 1;
108 while (wiphy_idx /= 10)
109 digits++;
110 /*
111 * deny the name if it is phy<idx> where <idx> is printed
112 * without leading zeroes. taken == strlen(newname) here
113 */
114 if (taken == strlen(PHY_NAME) + digits)
115 return -EINVAL;
116 }
117
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700118 /* Ensure another device does not already have this name. */
Johannes Berg79c97e92009-07-07 03:56:12 +0200119 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
Ben Greear1998d902014-10-22 12:23:00 -0700120 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
Johannes Berg76232252010-10-11 14:46:52 -0400121 return -EINVAL;
Eric W. Biederman2940bb62008-05-08 14:30:18 -0700122
Ben Greear1998d902014-10-22 12:23:00 -0700123 return 0;
124}
125
126int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
127 char *newname)
128{
129 int result;
130
131 ASSERT_RTNL();
132
133 /* Ignore nop renames */
134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
135 return 0;
136
137 result = cfg80211_dev_check_name(rdev, newname);
138 if (result < 0)
139 return result;
140
Johannes Berg55682962007-09-20 13:09:35 -0400141 result = device_rename(&rdev->wiphy.dev, newname);
142 if (result)
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100143 return result;
Johannes Berg55682962007-09-20 13:09:35 -0400144
Johannes Berg0bbab5f2020-05-25 11:38:17 +0200145 if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir))
Greg Kroah-Hartmand82574a2019-07-03 09:01:42 +0200146 debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
147 rdev->wiphy.debugfsdir,
148 rdev->wiphy.debugfsdir->d_parent, newname);
Johannes Berg55682962007-09-20 13:09:35 -0400149
Johannes Berg3bb20552014-05-26 13:52:25 +0200150 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
Johannes Berg55682962007-09-20 13:09:35 -0400151
Johannes Berg4bbf4d52009-03-24 09:35:46 +0100152 return 0;
Johannes Berg55682962007-09-20 13:09:35 -0400153}
154
Johannes Berg463d0182009-07-14 00:33:35 +0200155int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
156 struct net *net)
157{
158 struct wireless_dev *wdev;
159 int err = 0;
160
Johannes Berg5be83de2009-11-19 00:56:28 +0100161 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
Johannes Berg463d0182009-07-14 00:33:35 +0200162 return -EOPNOTSUPP;
163
Johannes Berg53873f12016-05-03 16:52:04 +0300164 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200165 if (!wdev->netdev)
166 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200167 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
168 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
169 if (err)
170 break;
171 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
172 }
173
174 if (err) {
175 /* failed -- clean up to old netns */
176 net = wiphy_net(&rdev->wiphy);
177
Johannes Berg53873f12016-05-03 16:52:04 +0300178 list_for_each_entry_continue_reverse(wdev,
179 &rdev->wiphy.wdev_list,
Johannes Berg463d0182009-07-14 00:33:35 +0200180 list) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200181 if (!wdev->netdev)
182 continue;
Johannes Berg463d0182009-07-14 00:33:35 +0200183 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
184 err = dev_change_net_namespace(wdev->netdev, net,
185 "wlan%d");
186 WARN_ON(err);
187 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
188 }
Johannes Berg04600792010-08-05 17:45:15 +0200189
190 return err;
Johannes Berg463d0182009-07-14 00:33:35 +0200191 }
192
Martin Willic90b6702018-10-27 09:31:24 +0200193 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
194 if (!wdev->netdev)
195 continue;
196 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
197 }
198 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
199
Johannes Berg463d0182009-07-14 00:33:35 +0200200 wiphy_net_set(&rdev->wiphy, net);
201
Johannes Berg04600792010-08-05 17:45:15 +0200202 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
203 WARN_ON(err);
204
Martin Willic90b6702018-10-27 09:31:24 +0200205 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
206 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
207 if (!wdev->netdev)
208 continue;
209 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
210 }
211
Johannes Berg04600792010-08-05 17:45:15 +0200212 return 0;
Johannes Berg463d0182009-07-14 00:33:35 +0200213}
214
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200215static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
216{
Johannes Berg79c97e92009-07-07 03:56:12 +0200217 struct cfg80211_registered_device *rdev = data;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200218
Hila Gonene35e4d22012-06-27 17:19:42 +0300219 rdev_rfkill_poll(rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200220}
221
Johannes Bergf9f47522013-03-19 15:04:07 +0100222void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
223 struct wireless_dev *wdev)
224{
Johannes Berga05829a2021-01-22 16:19:43 +0100225 lockdep_assert_held(&rdev->wiphy.mtx);
Johannes Bergf9f47522013-03-19 15:04:07 +0100226
227 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
228 return;
229
Arend Van Spriel73c7da32016-10-20 20:08:22 +0100230 if (!wdev_running(wdev))
Johannes Bergf9f47522013-03-19 15:04:07 +0100231 return;
232
233 rdev_stop_p2p_device(rdev, wdev);
Arend Van Spriel73c7da32016-10-20 20:08:22 +0100234 wdev->is_running = false;
Johannes Bergf9f47522013-03-19 15:04:07 +0100235
236 rdev->opencount--;
237
Johannes Berga6173022014-01-22 11:14:18 +0200238 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
Tova Mussaic8cb5b82020-09-18 11:33:13 +0200239 if (WARN_ON(!rdev->scan_req->notified &&
240 (!rdev->int_scan_req ||
241 !rdev->int_scan_req->notified)))
Avraham Stern1d762502016-07-05 17:10:13 +0300242 rdev->scan_req->info.aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +0200243 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +0200244 }
Johannes Bergf9f47522013-03-19 15:04:07 +0100245}
246
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300247void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
248 struct wireless_dev *wdev)
249{
Johannes Berga05829a2021-01-22 16:19:43 +0100250 lockdep_assert_held(&rdev->wiphy.mtx);
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300251
252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
253 return;
254
Arend Van Spriel73c7da32016-10-20 20:08:22 +0100255 if (!wdev_running(wdev))
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300256 return;
257
258 rdev_stop_nan(rdev, wdev);
Arend Van Spriel73c7da32016-10-20 20:08:22 +0100259 wdev->is_running = false;
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300260
261 rdev->opencount--;
262}
263
Johannes Bergf6837ba82014-04-30 14:19:04 +0200264void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200265{
Johannes Bergf6837ba82014-04-30 14:19:04 +0200266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200267 struct wireless_dev *wdev;
268
Johannes Bergf6837ba82014-04-30 14:19:04 +0200269 ASSERT_RTNL();
Johannes Bergf9f47522013-03-19 15:04:07 +0100270
Johannes Berg53873f12016-05-03 16:52:04 +0300271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
Johannes Berg98104fde2012-06-16 00:19:54 +0200272 if (wdev->netdev) {
Johannes Bergba22fb52012-06-15 18:00:00 +0200273 dev_close(wdev->netdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200274 continue;
275 }
Johannes Berga05829a2021-01-22 16:19:43 +0100276
Johannes Berg98104fde2012-06-16 00:19:54 +0200277 /* otherwise, check iftype */
Johannes Berga05829a2021-01-22 16:19:43 +0100278
279 wiphy_lock(wiphy);
280
Johannes Berg98104fde2012-06-16 00:19:54 +0200281 switch (wdev->iftype) {
282 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +0100283 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +0200284 break;
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300285 case NL80211_IFTYPE_NAN:
286 cfg80211_stop_nan(rdev, wdev);
287 break;
Johannes Berg98104fde2012-06-16 00:19:54 +0200288 default:
289 break;
290 }
Johannes Berga05829a2021-01-22 16:19:43 +0100291
292 wiphy_unlock(wiphy);
Johannes Berg98104fde2012-06-16 00:19:54 +0200293 }
Johannes Bergf6837ba82014-04-30 14:19:04 +0200294}
295EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200296
Johannes Bergf6837ba82014-04-30 14:19:04 +0200297static int cfg80211_rfkill_set_block(void *data, bool blocked)
298{
299 struct cfg80211_registered_device *rdev = data;
300
301 if (!blocked)
302 return 0;
303
304 rtnl_lock();
305 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200306 rtnl_unlock();
307
308 return 0;
309}
310
Johannes Berg3cfe91c2019-08-30 14:24:44 +0300311static void cfg80211_rfkill_block_work(struct work_struct *work)
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200312{
Johannes Berg79c97e92009-07-07 03:56:12 +0200313 struct cfg80211_registered_device *rdev;
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200314
Johannes Berg3cfe91c2019-08-30 14:24:44 +0300315 rdev = container_of(work, struct cfg80211_registered_device,
316 rfkill_block);
317 cfg80211_rfkill_set_block(rdev, true);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200318}
319
Johannes Berg667503d2009-07-07 03:56:11 +0200320static void cfg80211_event_work(struct work_struct *work)
321{
322 struct cfg80211_registered_device *rdev;
Johannes Berg667503d2009-07-07 03:56:11 +0200323
324 rdev = container_of(work, struct cfg80211_registered_device,
325 event_work);
326
Johannes Berga05829a2021-01-22 16:19:43 +0100327 wiphy_lock(&rdev->wiphy);
Johannes Berg3d54d252009-08-21 14:51:05 +0200328 cfg80211_process_rdev_events(rdev);
Johannes Berga05829a2021-01-22 16:19:43 +0100329 wiphy_unlock(&rdev->wiphy);
Johannes Berg667503d2009-07-07 03:56:11 +0200330}
331
Johannes Berg78f22b62014-03-24 17:57:27 +0100332void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
333{
Johannes Bergab810072017-04-26 07:43:41 +0200334 struct wireless_dev *wdev, *tmp;
Johannes Berg78f22b62014-03-24 17:57:27 +0100335
336 ASSERT_RTNL();
337
Johannes Bergf0a6fd12022-02-01 14:09:51 +0100338 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
Johannes Bergea6b2092021-04-27 11:49:52 +0200339 if (wdev->nl_owner_dead) {
340 if (wdev->netdev)
341 dev_close(wdev->netdev);
Johannes Bergea6b2092021-04-27 11:49:52 +0200342
Johannes Bergf0a6fd12022-02-01 14:09:51 +0100343 wiphy_lock(&rdev->wiphy);
Johannes Bergea6b2092021-04-27 11:49:52 +0200344 cfg80211_leave(rdev, wdev);
Johannes Bergcdf0a0a2022-07-06 09:57:42 +0200345 cfg80211_remove_virtual_intf(rdev, wdev);
Johannes Bergf0a6fd12022-02-01 14:09:51 +0100346 wiphy_unlock(&rdev->wiphy);
Johannes Bergea6b2092021-04-27 11:49:52 +0200347 }
348 }
Johannes Berg78f22b62014-03-24 17:57:27 +0100349}
350
351static void cfg80211_destroy_iface_wk(struct work_struct *work)
352{
353 struct cfg80211_registered_device *rdev;
354
355 rdev = container_of(work, struct cfg80211_registered_device,
356 destroy_work);
357
358 rtnl_lock();
359 cfg80211_destroy_ifaces(rdev);
360 rtnl_unlock();
361}
362
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200363static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
364{
365 struct cfg80211_registered_device *rdev;
Arend Van Sprielca986ad2017-04-21 13:05:00 +0100366 struct cfg80211_sched_scan_request *req, *tmp;
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200367
368 rdev = container_of(work, struct cfg80211_registered_device,
369 sched_scan_stop_wk);
370
371 rtnl_lock();
Arend Van Sprielca986ad2017-04-21 13:05:00 +0100372 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
373 if (req->nl_owner_dead)
374 cfg80211_stop_sched_scan_req(rdev, req, false);
375 }
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200376 rtnl_unlock();
377}
378
Vasanthakumar Thiagarajan897667272017-02-27 17:04:35 +0530379static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
380{
381 struct cfg80211_registered_device *rdev;
382
383 rdev = container_of(work, struct cfg80211_registered_device,
384 propagate_radar_detect_wk);
385
386 rtnl_lock();
387
388 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
389 NL80211_DFS_UNAVAILABLE,
390 NL80211_RADAR_DETECTED);
391
392 rtnl_unlock();
393}
394
395static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
396{
397 struct cfg80211_registered_device *rdev;
398
399 rdev = container_of(work, struct cfg80211_registered_device,
400 propagate_cac_done_wk);
401
402 rtnl_lock();
403
404 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
405 NL80211_DFS_AVAILABLE,
406 NL80211_RADAR_CAC_FINISHED);
407
408 rtnl_unlock();
409}
410
Johannes Berg704232c2007-04-23 12:20:05 -0700411/* exported functions */
412
Ben Greear1998d902014-10-22 12:23:00 -0700413struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
414 const char *requested_name)
Johannes Berg704232c2007-04-23 12:20:05 -0700415{
Johannes Berg73810b72013-05-08 21:49:02 +0200416 static atomic_t wiphy_counter = ATOMIC_INIT(0);
Johannes Berg76232252010-10-11 14:46:52 -0400417
418 struct cfg80211_registered_device *rdev;
Johannes Berg704232c2007-04-23 12:20:05 -0700419 int alloc_size;
420
Johannes Berg0b20633d2009-07-07 03:56:13 +0200421 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
422 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
423 WARN_ON(ops->connect && !ops->disconnect);
424 WARN_ON(ops->join_ibss && !ops->leave_ibss);
425 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
426 WARN_ON(ops->add_station && !ops->del_station);
427 WARN_ON(ops->add_mpath && !ops->del_mpath);
Johannes Berg29cbe682010-12-03 09:20:44 +0100428 WARN_ON(ops->join_mesh && !ops->leave_mesh);
Ola Olssonde3bb772015-12-16 22:43:35 +0100429 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
430 WARN_ON(ops->start_ap && !ops->stop_ap);
431 WARN_ON(ops->join_ocb && !ops->leave_ocb);
432 WARN_ON(ops->suspend && !ops->resume);
433 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
434 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
435 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
436 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
Johannes Berg41ade002007-12-19 02:03:29 +0100437
Johannes Berg79c97e92009-07-07 03:56:12 +0200438 alloc_size = sizeof(*rdev) + sizeof_priv;
Johannes Berg704232c2007-04-23 12:20:05 -0700439
Johannes Berg79c97e92009-07-07 03:56:12 +0200440 rdev = kzalloc(alloc_size, GFP_KERNEL);
441 if (!rdev)
Johannes Berg704232c2007-04-23 12:20:05 -0700442 return NULL;
443
Johannes Berg79c97e92009-07-07 03:56:12 +0200444 rdev->ops = ops;
Johannes Berg704232c2007-04-23 12:20:05 -0700445
Johannes Berg73810b72013-05-08 21:49:02 +0200446 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
Johannes Berga4d73ee2007-04-26 20:50:35 -0700447
Johannes Bergf4173762012-12-03 18:23:37 +0100448 if (unlikely(rdev->wiphy_idx < 0)) {
Johannes Berg76232252010-10-11 14:46:52 -0400449 /* ugh, wrapped! */
Johannes Berg73810b72013-05-08 21:49:02 +0200450 atomic_dec(&wiphy_counter);
Johannes Berg79c97e92009-07-07 03:56:12 +0200451 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -0700452 return NULL;
453 }
Johannes Berg704232c2007-04-23 12:20:05 -0700454
Johannes Berg9b881962013-06-04 22:23:36 +0200455 /* atomic_inc_return makes it start at 1, make it start at 0 */
456 rdev->wiphy_idx--;
457
Johannes Berg76232252010-10-11 14:46:52 -0400458 /* give it a proper name */
Ben Greear1998d902014-10-22 12:23:00 -0700459 if (requested_name && requested_name[0]) {
460 int rv;
461
462 rtnl_lock();
463 rv = cfg80211_dev_check_name(rdev, requested_name);
464
465 if (rv < 0) {
466 rtnl_unlock();
467 goto use_default_name;
468 }
469
470 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
471 rtnl_unlock();
472 if (rv)
473 goto use_default_name;
474 } else {
Johannes Berg59b179b42018-01-15 09:58:27 +0100475 int rv;
476
Ben Greear1998d902014-10-22 12:23:00 -0700477use_default_name:
478 /* NOTE: This is *probably* safe w/out holding rtnl because of
479 * the restrictions on phy names. Probably this call could
480 * fail if some other part of the kernel (re)named a device
481 * phyX. But, might should add some locking and check return
482 * value, and use a different name if this one exists?
483 */
Johannes Berg59b179b42018-01-15 09:58:27 +0100484 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
485 if (rv < 0) {
486 kfree(rdev);
487 return NULL;
488 }
Ben Greear1998d902014-10-22 12:23:00 -0700489 }
Johannes Berg76232252010-10-11 14:46:52 -0400490
Johannes Berga05829a2021-01-22 16:19:43 +0100491 mutex_init(&rdev->wiphy.mtx);
Johannes Berg53873f12016-05-03 16:52:04 +0300492 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
Ben Greear37c73b52012-10-26 14:49:25 -0700493 INIT_LIST_HEAD(&rdev->beacon_registrations);
494 spin_lock_init(&rdev->beacon_registrations_lock);
Johannes Berg79c97e92009-07-07 03:56:12 +0200495 spin_lock_init(&rdev->bss_lock);
496 INIT_LIST_HEAD(&rdev->bss_list);
Arend Van Sprielca986ad2017-04-21 13:05:00 +0100497 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
Johannes Berg79c97e92009-07-07 03:56:12 +0200498 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
Simon Wunderlich04f39042013-02-08 18:16:19 +0100499 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
500 cfg80211_dfs_channels_update_work);
Johannes Berg3d23e342009-09-29 23:27:28 +0200501#ifdef CONFIG_CFG80211_WEXT
502 rdev->wiphy.wext = &cfg80211_wext_handler;
503#endif
504
Johannes Berg79c97e92009-07-07 03:56:12 +0200505 device_initialize(&rdev->wiphy.dev);
506 rdev->wiphy.dev.class = &ieee80211_class;
507 rdev->wiphy.dev.platform_data = rdev;
Fu, Zhonghui9f0e1352015-09-19 10:40:14 +0800508 device_enable_async_suspend(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -0700509
Johannes Berg78f22b62014-03-24 17:57:27 +0100510 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
Jukka Rissanen93a1e862014-12-15 13:25:39 +0200511 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
Arend Van Sprielb34939b2017-04-28 13:40:28 +0100512 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
Vasanthakumar Thiagarajan897667272017-02-27 17:04:35 +0530513 INIT_WORK(&rdev->propagate_radar_detect_wk,
514 cfg80211_propagate_radar_detect_wk);
515 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
Johannes Berg79ea1e122020-06-04 12:04:20 +0200516 INIT_WORK(&rdev->mgmt_registrations_update_wk,
517 cfg80211_mgmt_registrations_update_wk);
Johannes Berg09b1d5d2021-10-25 13:31:12 +0200518 spin_lock_init(&rdev->mgmt_registrations_lock);
Johannes Berg78f22b62014-03-24 17:57:27 +0100519
Johannes Berg5be83de2009-11-19 00:56:28 +0100520#ifdef CONFIG_CFG80211_DEFAULT_PS
521 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
522#endif
Johannes Berg16cb9d422009-08-12 23:33:20 +0200523
Johannes Berg463d0182009-07-14 00:33:35 +0200524 wiphy_net_set(&rdev->wiphy, &init_net);
525
Johannes Berg79c97e92009-07-07 03:56:12 +0200526 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
Emmanuel Grumbach358ae882021-06-16 23:28:26 +0300527 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
528 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
529 &rdev->rfkill_ops, rdev);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200530
Emmanuel Grumbach358ae882021-06-16 23:28:26 +0300531 if (!rdev->wiphy.rfkill) {
Eric Biggers4f488fb2019-06-10 13:02:19 -0700532 wiphy_free(&rdev->wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200533 return NULL;
534 }
535
Johannes Berg3cfe91c2019-08-30 14:24:44 +0300536 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
Johannes Berg79c97e92009-07-07 03:56:12 +0200537 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
538 INIT_WORK(&rdev->event_work, cfg80211_event_work);
Lorenzo Bianconia95bfb82021-11-29 14:11:24 +0100539 INIT_WORK(&rdev->background_cac_abort_wk,
540 cfg80211_background_cac_abort_wk);
541 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
542 cfg80211_background_cac_done_wk);
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200543
Johannes Bergad002392009-08-18 19:51:57 +0200544 init_waitqueue_head(&rdev->dev_wait);
545
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200546 /*
547 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
548 * Fragmentation and RTS threshold are disabled by default with the
549 * special -1 value.
550 */
Johannes Berg79c97e92009-07-07 03:56:12 +0200551 rdev->wiphy.retry_short = 7;
552 rdev->wiphy.retry_long = 4;
553 rdev->wiphy.frag_threshold = (u32) -1;
554 rdev->wiphy.rts_threshold = (u32) -1;
Lukáš Turek81077e82009-12-21 22:50:47 +0100555 rdev->wiphy.coverage_class = 0;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200556
Andrei Otcheretianski9a774c72014-05-09 14:11:46 +0300557 rdev->wiphy.max_num_csa_counters = 1;
558
Avraham Stern3b06d272015-10-12 09:51:34 +0300559 rdev->wiphy.max_sched_scan_plans = 1;
560 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
561
Johannes Berg79c97e92009-07-07 03:56:12 +0200562 return &rdev->wiphy;
Johannes Berg704232c2007-04-23 12:20:05 -0700563}
Ben Greear1998d902014-10-22 12:23:00 -0700564EXPORT_SYMBOL(wiphy_new_nm);
Johannes Berg704232c2007-04-23 12:20:05 -0700565
Johannes Berg7527a782011-05-13 10:58:57 +0200566static int wiphy_verify_combinations(struct wiphy *wiphy)
567{
568 const struct ieee80211_iface_combination *c;
569 int i, j;
570
Johannes Berg7527a782011-05-13 10:58:57 +0200571 for (i = 0; i < wiphy->n_iface_combinations; i++) {
572 u32 cnt = 0;
573 u16 all_iftypes = 0;
574
575 c = &wiphy->iface_combinations[i];
576
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100577 /*
578 * Combinations with just one interface aren't real,
579 * however we make an exception for DFS.
580 */
581 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
Johannes Berg7527a782011-05-13 10:58:57 +0200582 return -EINVAL;
583
584 /* Need at least one channel */
585 if (WARN_ON(!c->num_different_channels))
586 return -EINVAL;
587
Simon Wunderlich11c4a072013-01-08 14:04:07 +0100588 /* DFS only works on one channel. */
589 if (WARN_ON(c->radar_detect_widths &&
590 (c->num_different_channels > 1)))
591 return -EINVAL;
592
Johannes Berg7527a782011-05-13 10:58:57 +0200593 if (WARN_ON(!c->n_limits))
594 return -EINVAL;
595
596 for (j = 0; j < c->n_limits; j++) {
597 u16 types = c->limits[j].types;
598
Luciano Coelhob6a55012014-02-27 11:07:21 +0200599 /* interface types shouldn't overlap */
Johannes Berg7527a782011-05-13 10:58:57 +0200600 if (WARN_ON(types & all_iftypes))
601 return -EINVAL;
602 all_iftypes |= types;
603
604 if (WARN_ON(!c->limits[j].max))
605 return -EINVAL;
606
607 /* Shouldn't list software iftypes in combinations! */
608 if (WARN_ON(wiphy->software_iftypes & types))
609 return -EINVAL;
610
Johannes Berg98104fde2012-06-16 00:19:54 +0200611 /* Only a single P2P_DEVICE can be allowed */
612 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
613 c->limits[j].max > 1))
614 return -EINVAL;
615
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300616 /* Only a single NAN can be allowed */
617 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
618 c->limits[j].max > 1))
619 return -EINVAL;
620
Johannes Berg56271da2016-10-21 14:25:12 +0200621 /*
622 * This isn't well-defined right now. If you have an
623 * IBSS interface, then its beacon interval may change
624 * by joining other networks, and nothing prevents it
625 * from doing that.
626 * So technically we probably shouldn't even allow AP
627 * and IBSS in the same interface, but it seems that
628 * some drivers support that, possibly only with fixed
629 * beacon intervals for IBSS.
630 */
631 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
632 c->beacon_int_min_gcd)) {
633 return -EINVAL;
634 }
635
Johannes Berg7527a782011-05-13 10:58:57 +0200636 cnt += c->limits[j].max;
637 /*
638 * Don't advertise an unsupported type
639 * in a combination.
640 */
641 if (WARN_ON((wiphy->interface_modes & types) != types))
642 return -EINVAL;
643 }
644
Johannes Berg8f205422016-10-18 10:28:57 +0200645 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
646 return -EINVAL;
Johannes Berg8f205422016-10-18 10:28:57 +0200647
Johannes Berg7527a782011-05-13 10:58:57 +0200648 /* You can't even choose that many! */
649 if (WARN_ON(cnt < c->max_interfaces))
650 return -EINVAL;
651 }
652
653 return 0;
654}
655
Johannes Berg704232c2007-04-23 12:20:05 -0700656int wiphy_register(struct wiphy *wiphy)
657{
Zhao, Gangf26cbf42014-04-21 12:53:03 +0800658 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -0700659 int res;
Johannes Berg57fbcce2016-04-12 15:56:15 +0200660 enum nl80211_band band;
Johannes Berg8318d782008-01-24 19:38:38 +0100661 struct ieee80211_supported_band *sband;
662 bool have_band = false;
663 int i;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700664 u16 ifmodes = wiphy->interface_modes;
665
Johannes Bergdfb89c52012-06-27 09:23:48 +0200666#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200667 if (WARN_ON(wiphy->wowlan &&
668 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
669 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
670 return -EINVAL;
671 if (WARN_ON(wiphy->wowlan &&
672 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
673 !wiphy->wowlan->tcp))
Johannes Berg77dbbb12011-07-13 10:48:55 +0200674 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200675#endif
Arik Nemtsov1057d352014-11-19 12:54:26 +0200676 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
677 (!rdev->ops->tdls_channel_switch ||
678 !rdev->ops->tdls_cancel_channel_switch)))
679 return -EINVAL;
Johannes Berg77dbbb12011-07-13 10:48:55 +0200680
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300681 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
Ayala Bekera442b762016-09-20 17:31:15 +0300682 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
Luca Coelho85859892017-02-08 15:00:34 +0200683 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
684 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300685 return -EINVAL;
686
Johannes Berg8f205422016-10-18 10:28:57 +0200687 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
688 return -EINVAL;
Johannes Berg8f205422016-10-18 10:28:57 +0200689
Johannes Berg9bb7e0f2018-09-10 13:29:12 +0200690 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
691 return -EINVAL;
692
693 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
694 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
695 !wiphy->pmsr_capa->ftm.non_asap))
696 return -EINVAL;
697 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
698 !wiphy->pmsr_capa->ftm.bandwidths))
699 return -EINVAL;
700 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
701 ~(BIT(NL80211_PREAMBLE_LEGACY) |
702 BIT(NL80211_PREAMBLE_HT) |
703 BIT(NL80211_PREAMBLE_VHT) |
Avraham Sternefb55202020-01-31 13:12:38 +0200704 BIT(NL80211_PREAMBLE_HE) |
Johannes Berg9bb7e0f2018-09-10 13:29:12 +0200705 BIT(NL80211_PREAMBLE_DMG))))
706 return -EINVAL;
Avraham Sternefb55202020-01-31 13:12:38 +0200707 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
708 wiphy->pmsr_capa->ftm.non_trigger_based) &&
709 !(wiphy->pmsr_capa->ftm.preambles &
710 BIT(NL80211_PREAMBLE_HE))))
711 return -EINVAL;
Johannes Berg9bb7e0f2018-09-10 13:29:12 +0200712 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
713 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
714 BIT(NL80211_CHAN_WIDTH_20) |
715 BIT(NL80211_CHAN_WIDTH_40) |
716 BIT(NL80211_CHAN_WIDTH_80) |
717 BIT(NL80211_CHAN_WIDTH_80P80) |
718 BIT(NL80211_CHAN_WIDTH_160) |
719 BIT(NL80211_CHAN_WIDTH_5) |
720 BIT(NL80211_CHAN_WIDTH_10))))
721 return -EINVAL;
722 }
723
Arik Nemtsovad932f02014-11-27 09:44:55 +0200724 /*
725 * if a wiphy has unsupported modes for regulatory channel enforcement,
726 * opt-out of enforcement checking
727 */
728 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
729 BIT(NL80211_IFTYPE_P2P_CLIENT) |
730 BIT(NL80211_IFTYPE_AP) |
Sriram R701fdfe2021-12-02 07:08:40 +0530731 BIT(NL80211_IFTYPE_MESH_POINT) |
Arik Nemtsovad932f02014-11-27 09:44:55 +0200732 BIT(NL80211_IFTYPE_P2P_GO) |
733 BIT(NL80211_IFTYPE_ADHOC) |
734 BIT(NL80211_IFTYPE_P2P_DEVICE) |
Ayala Bekercb3b7d82016-09-20 17:31:13 +0300735 BIT(NL80211_IFTYPE_NAN) |
Arik Nemtsovad932f02014-11-27 09:44:55 +0200736 BIT(NL80211_IFTYPE_AP_VLAN) |
737 BIT(NL80211_IFTYPE_MONITOR)))
738 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
739
Jonathan Doronb0d7aa52014-12-15 19:26:00 +0200740 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
741 (wiphy->regulatory_flags &
742 (REGULATORY_CUSTOM_REG |
743 REGULATORY_STRICT_REG |
744 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
745 REGULATORY_COUNTRY_IE_IGNORE))))
746 return -EINVAL;
747
Amitkumar Karwarbe29b99a2013-06-28 11:51:26 -0700748 if (WARN_ON(wiphy->coalesce &&
749 (!wiphy->coalesce->n_rules ||
750 !wiphy->coalesce->n_patterns) &&
751 (!wiphy->coalesce->pattern_min_len ||
752 wiphy->coalesce->pattern_min_len >
753 wiphy->coalesce->pattern_max_len)))
754 return -EINVAL;
755
Johannes Berg562a7482011-11-07 12:39:33 +0100756 if (WARN_ON(wiphy->ap_sme_capa &&
757 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
758 return -EINVAL;
759
Johannes Bergef15aac2010-01-20 12:02:33 +0100760 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
761 return -EINVAL;
762
763 if (WARN_ON(wiphy->addresses &&
764 !is_zero_ether_addr(wiphy->perm_addr) &&
765 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
766 ETH_ALEN)))
767 return -EINVAL;
768
Vasanthakumar Thiagarajan77765ea2013-01-18 11:18:45 +0530769 if (WARN_ON(wiphy->max_acl_mac_addrs &&
770 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
771 !rdev->ops->set_mac_acl)))
772 return -EINVAL;
773
Arend van Spriel38de03d2016-03-02 20:37:18 +0100774 /* assure only valid behaviours are flagged by driver
775 * hence subtract 2 as bit 0 is invalid.
776 */
777 if (WARN_ON(wiphy->bss_select_support &&
778 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
779 return -EINVAL;
780
Avraham Stern3a00df52017-06-09 13:08:43 +0100781 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
782 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
783 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
784 return -EINVAL;
785
Vidyullatha Kanchanapally7f9a3e12018-05-22 10:19:08 +0200786 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
787 rdev->ops->update_connect_params))
788 return -EINVAL;
789
Johannes Bergef15aac2010-01-20 12:02:33 +0100790 if (wiphy->addresses)
791 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
792
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700793 /* sanity check ifmodes */
794 WARN_ON(!ifmodes);
Johannes Berg2e161f782010-08-12 15:38:38 +0200795 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700796 if (WARN_ON(ifmodes != wiphy->interface_modes))
797 wiphy->interface_modes = ifmodes;
Johannes Berg8318d782008-01-24 19:38:38 +0100798
Johannes Berg7527a782011-05-13 10:58:57 +0200799 res = wiphy_verify_combinations(wiphy);
800 if (res)
801 return res;
802
Johannes Berg8318d782008-01-24 19:38:38 +0100803 /* sanity check supported bands/channels */
Johannes Berg57fbcce2016-04-12 15:56:15 +0200804 for (band = 0; band < NUM_NL80211_BANDS; band++) {
Luca Coelhoc4cbaf72018-06-09 09:14:42 +0300805 u16 types = 0;
Johannes Bergf4381362020-05-28 21:34:42 +0200806 bool have_he = false;
Luca Coelhoc4cbaf72018-06-09 09:14:42 +0300807
Johannes Berg8318d782008-01-24 19:38:38 +0100808 sband = wiphy->bands[band];
809 if (!sband)
810 continue;
811
812 sband->band = band;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300813 if (WARN_ON(!sband->n_channels))
814 return -EINVAL;
815 /*
Thomas Pedersendf78a0c2020-06-01 23:22:47 -0700816 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300817 * n_bitrates is 0
818 */
Thomas Pedersendf78a0c2020-06-01 23:22:47 -0700819 if (WARN_ON((band != NL80211_BAND_60GHZ &&
820 band != NL80211_BAND_S1GHZ) &&
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300821 !sband->n_bitrates))
Johannes Berg8318d782008-01-24 19:38:38 +0100822 return -EINVAL;
Johannes Berg881d9482009-01-21 15:13:48 +0100823
Johannes Berg461ce352020-05-28 21:34:41 +0200824 if (WARN_ON(band == NL80211_BAND_6GHZ &&
825 (sband->ht_cap.ht_supported ||
826 sband->vht_cap.vht_supported)))
827 return -EINVAL;
828
Johannes Berg881d9482009-01-21 15:13:48 +0100829 /*
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700830 * Since cfg80211_disable_40mhz_24ghz is global, we can
831 * modify the sband's ht data even if the driver uses a
832 * global structure for that.
833 */
834 if (cfg80211_disable_40mhz_24ghz &&
Johannes Berg57fbcce2016-04-12 15:56:15 +0200835 band == NL80211_BAND_2GHZ &&
Amitkumar Karwar40db6c72011-04-21 14:10:27 -0700836 sband->ht_cap.ht_supported) {
837 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
838 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
839 }
840
841 /*
Johannes Berg881d9482009-01-21 15:13:48 +0100842 * Since we use a u32 for rate bitmaps in
843 * ieee80211_get_response_rate, we cannot
844 * have more than 32 legacy rates.
845 */
846 if (WARN_ON(sband->n_bitrates > 32))
847 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100848
849 for (i = 0; i < sband->n_channels; i++) {
850 sband->channels[i].orig_flags =
851 sband->channels[i].flags;
Felix Fietkauc4a9faf2012-10-17 13:56:19 +0200852 sband->channels[i].orig_mag = INT_MAX;
Johannes Berg8318d782008-01-24 19:38:38 +0100853 sband->channels[i].orig_mpwr =
854 sband->channels[i].max_power;
855 sband->channels[i].band = band;
Johannes Bergbe689f682020-04-24 12:01:04 +0200856
857 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
858 return -EINVAL;
Johannes Berg8318d782008-01-24 19:38:38 +0100859 }
860
Luca Coelhoc4cbaf72018-06-09 09:14:42 +0300861 for (i = 0; i < sband->n_iftype_data; i++) {
862 const struct ieee80211_sband_iftype_data *iftd;
Johannes Bergea5cba22022-08-16 11:26:23 +0200863 bool has_ap, has_non_ap;
864 u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
865 BIT(NL80211_IFTYPE_P2P_GO);
Luca Coelhoc4cbaf72018-06-09 09:14:42 +0300866
867 iftd = &sband->iftype_data[i];
868
869 if (WARN_ON(!iftd->types_mask))
870 return -EINVAL;
871 if (WARN_ON(types & iftd->types_mask))
872 return -EINVAL;
873
874 /* at least one piece of information must be present */
875 if (WARN_ON(!iftd->he_cap.has_he))
876 return -EINVAL;
877
878 types |= iftd->types_mask;
Johannes Bergf4381362020-05-28 21:34:42 +0200879
880 if (i == 0)
881 have_he = iftd->he_cap.has_he;
882 else
883 have_he = have_he &&
884 iftd->he_cap.has_he;
Johannes Bergea5cba22022-08-16 11:26:23 +0200885
886 has_ap = iftd->types_mask & ap_bits;
887 has_non_ap = iftd->types_mask & ~ap_bits;
888
889 /*
890 * For EHT 20 MHz STA, the capabilities format differs
891 * but to simplify, don't check 20 MHz but rather check
892 * only if AP and non-AP were mentioned at the same time,
893 * reject if so.
894 */
895 if (WARN_ON(iftd->eht_cap.has_eht &&
896 has_ap && has_non_ap))
897 return -EINVAL;
Luca Coelhoc4cbaf72018-06-09 09:14:42 +0300898 }
899
Johannes Bergf4381362020-05-28 21:34:42 +0200900 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
901 return -EINVAL;
902
Johannes Berg8318d782008-01-24 19:38:38 +0100903 have_band = true;
904 }
905
906 if (!have_band) {
907 WARN_ON(1);
908 return -EINVAL;
909 }
910
Johannes Berg901bb982019-05-28 10:56:03 +0200911 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
912 /*
913 * Validate we have a policy (can be explicitly set to
914 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
915 * we have at least one of doit/dumpit.
916 */
917 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
918 return -EINVAL;
919 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
920 !rdev->wiphy.vendor_commands[i].dumpit))
921 return -EINVAL;
922 }
923
Johannes Bergdfb89c52012-06-27 09:23:48 +0200924#ifdef CONFIG_PM
Johannes Berg964dc9e2013-06-03 17:25:34 +0200925 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
926 (!rdev->wiphy.wowlan->pattern_min_len ||
927 rdev->wiphy.wowlan->pattern_min_len >
928 rdev->wiphy.wowlan->pattern_max_len)))
929 return -EINVAL;
Johannes Bergdfb89c52012-06-27 09:23:48 +0200930#endif
Johannes Bergff1b6e62011-05-04 15:37:28 +0200931
Veerendranath Jakkamecad3b02022-05-23 18:55:58 +0530932 if (!wiphy->max_num_akm_suites)
933 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
934 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
935 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
936 return -EINVAL;
937
Johannes Berg8318d782008-01-24 19:38:38 +0100938 /* check and set up bitrates */
939 ieee80211_set_bitrate_flags(wiphy);
940
Johannes Berg00c3a6e2013-10-26 17:14:38 +0200941 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
942
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200943 rtnl_lock();
Johannes Berg79c97e92009-07-07 03:56:12 +0200944 res = device_add(&rdev->wiphy.dev);
John W. Linvillec3d34d52010-08-30 17:36:40 -0400945 if (res) {
Johannes Bergaa5f66d2013-09-26 20:03:45 +0200946 rtnl_unlock();
John W. Linvillec3d34d52010-08-30 17:36:40 -0400947 return res;
948 }
Johannes Berg1f87f7d2009-06-02 13:01:41 +0200949
Johannes Berg5f2aa252010-01-17 15:49:02 +0100950 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
Johannes Bergf5ea9122009-08-07 16:17:38 +0200951 cfg80211_rdev_list_generation++;
Johannes Berg704232c2007-04-23 12:20:05 -0700952
953 /* add to debugfs */
Greg Kroah-Hartmand82574a2019-07-03 09:01:42 +0200954 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
955 ieee80211_debugfs_dir);
Johannes Berg704232c2007-04-23 12:20:05 -0700956
Tomasz Bursztykaa796dac2014-08-13 16:04:51 +0300957 cfg80211_debugfs_rdev_add(rdev);
958 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
959
Miri Korenblit1b7b3ac2021-06-18 13:41:46 +0300960 /* set up regulatory info */
961 wiphy_regulatory_register(wiphy);
962
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +0100963 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -0400964 struct regulatory_request request;
965
966 request.wiphy_idx = get_wiphy_idx(wiphy);
967 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
968 request.alpha2[0] = '9';
969 request.alpha2[1] = '9';
970
971 nl80211_send_reg_change_event(&request);
972 }
973
Kanchanapally, Vidyullatha019ae3a2016-05-16 10:41:04 +0530974 /* Check that nobody globally advertises any capabilities they do not
975 * advertise on all possible interface types.
976 */
977 if (wiphy->extended_capabilities_len &&
978 wiphy->num_iftype_ext_capab &&
979 wiphy->iftype_ext_capab) {
980 u8 supported_on_all, j;
981 const struct wiphy_iftype_ext_capab *capab;
982
983 capab = wiphy->iftype_ext_capab;
984 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
985 if (capab[0].extended_capabilities_len > j)
986 supported_on_all =
987 capab[0].extended_capabilities[j];
988 else
989 supported_on_all = 0x00;
990 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
991 if (j >= capab[i].extended_capabilities_len) {
992 supported_on_all = 0x00;
993 break;
994 }
995 supported_on_all &=
996 capab[i].extended_capabilities[j];
997 }
998 if (WARN_ON(wiphy->extended_capabilities[j] &
999 ~supported_on_all))
1000 break;
1001 }
1002 }
1003
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +02001004 rdev->wiphy.registered = true;
1005 rtnl_unlock();
Johannes Bergaa5f66d2013-09-26 20:03:45 +02001006
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001007 res = rfkill_register(rdev->wiphy.rfkill);
Johannes Bergaa5f66d2013-09-26 20:03:45 +02001008 if (res) {
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001009 rfkill_destroy(rdev->wiphy.rfkill);
1010 rdev->wiphy.rfkill = NULL;
Johannes Bergaa5f66d2013-09-26 20:03:45 +02001011 wiphy_unregister(&rdev->wiphy);
1012 return res;
1013 }
1014
Johannes Berg2f0accc2009-06-10 16:50:29 +02001015 return 0;
Johannes Berg704232c2007-04-23 12:20:05 -07001016}
1017EXPORT_SYMBOL(wiphy_register);
1018
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001019void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1020{
Zhao, Gangf26cbf42014-04-21 12:53:03 +08001021 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001022
Johannes Berg79c97e92009-07-07 03:56:12 +02001023 if (!rdev->ops->rfkill_poll)
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001024 return;
Johannes Berg79c97e92009-07-07 03:56:12 +02001025 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001026 rfkill_resume_polling(wiphy->rfkill);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001027}
1028EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1029
Johannes Berg704232c2007-04-23 12:20:05 -07001030void wiphy_unregister(struct wiphy *wiphy)
1031{
Zhao, Gangf26cbf42014-04-21 12:53:03 +08001032 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -07001033
Johannes Berg5fe231e2013-05-08 21:45:15 +02001034 wait_event(rdev->dev_wait, ({
1035 int __count;
Johannes Berga05829a2021-01-22 16:19:43 +01001036 wiphy_lock(&rdev->wiphy);
Johannes Berg5fe231e2013-05-08 21:45:15 +02001037 __count = rdev->opencount;
Johannes Berga05829a2021-01-22 16:19:43 +01001038 wiphy_unlock(&rdev->wiphy);
Johannes Berg5fe231e2013-05-08 21:45:15 +02001039 __count == 0; }));
1040
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001041 if (rdev->wiphy.rfkill)
1042 rfkill_unregister(rdev->wiphy.rfkill);
Johannes Berg256c90d2013-06-04 19:21:08 +02001043
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +02001044 rtnl_lock();
Johannes Berga05829a2021-01-22 16:19:43 +01001045 wiphy_lock(&rdev->wiphy);
Johannes Berg3bb20552014-05-26 13:52:25 +02001046 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +02001047 rdev->wiphy.registered = false;
Stanislaw Gruszkaecb44332011-08-12 14:00:59 +02001048
Johannes Berg53873f12016-05-03 16:52:04 +03001049 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
Johannes Bergad002392009-08-18 19:51:57 +02001050
1051 /*
1052 * First remove the hardware from everywhere, this makes
1053 * it impossible to find from userspace.
1054 */
Johannes Berg7bcfaf22009-10-27 12:59:03 +01001055 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
Johannes Berg5f2aa252010-01-17 15:49:02 +01001056 list_del_rcu(&rdev->list);
1057 synchronize_rcu();
Johannes Bergf16bfc1c2007-04-26 20:51:12 -07001058
1059 /*
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07001060 * If this device got a regulatory hint tell core its
1061 * free to listen now to a new shiny device regulatory hint
1062 */
1063 wiphy_regulatory_deregister(wiphy);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001064
Johannes Bergf5ea9122009-08-07 16:17:38 +02001065 cfg80211_rdev_list_generation++;
Johannes Berg79c97e92009-07-07 03:56:12 +02001066 device_del(&rdev->wiphy.dev);
Johannes Berg704232c2007-04-23 12:20:05 -07001067
Johannes Berga05829a2021-01-22 16:19:43 +01001068 wiphy_unlock(&rdev->wiphy);
Johannes Berg5fe231e2013-05-08 21:45:15 +02001069 rtnl_unlock();
Johannes Berg66825882009-07-13 13:24:44 +02001070
Johannes Berg36e6fea2009-08-12 22:21:21 +02001071 flush_work(&rdev->scan_done_wk);
Johannes Berg66825882009-07-13 13:24:44 +02001072 cancel_work_sync(&rdev->conn_work);
Johannes Berg66825882009-07-13 13:24:44 +02001073 flush_work(&rdev->event_work);
Simon Wunderlich04f39042013-02-08 18:16:19 +01001074 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
Lorenzo Bianconia95bfb82021-11-29 14:11:24 +01001075 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
Johannes Berg78f22b62014-03-24 17:57:27 +01001076 flush_work(&rdev->destroy_work);
Jukka Rissanen93a1e862014-12-15 13:25:39 +02001077 flush_work(&rdev->sched_scan_stop_wk);
Vasanthakumar Thiagarajan897667272017-02-27 17:04:35 +05301078 flush_work(&rdev->propagate_radar_detect_wk);
1079 flush_work(&rdev->propagate_cac_done_wk);
Johannes Berg79ea1e122020-06-04 12:04:20 +02001080 flush_work(&rdev->mgmt_registrations_update_wk);
Lorenzo Bianconia95bfb82021-11-29 14:11:24 +01001081 flush_work(&rdev->background_cac_abort_wk);
Johannes Berg6d525632012-04-04 15:05:25 +02001082
Johannes Berg6abb9cb2013-05-15 09:30:07 +02001083#ifdef CONFIG_PM
1084 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
Hila Gonene35e4d22012-06-27 17:19:42 +03001085 rdev_set_wakeup(rdev, false);
Johannes Berg6abb9cb2013-05-15 09:30:07 +02001086#endif
Johannes Berg6d525632012-04-04 15:05:25 +02001087 cfg80211_rdev_free_wowlan(rdev);
Amitkumar Karwarbe29b99a2013-06-28 11:51:26 -07001088 cfg80211_rdev_free_coalesce(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -07001089}
1090EXPORT_SYMBOL(wiphy_unregister);
1091
Johannes Berg79c97e92009-07-07 03:56:12 +02001092void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
Johannes Berg704232c2007-04-23 12:20:05 -07001093{
Johannes Berg2a519312009-02-10 21:25:55 +01001094 struct cfg80211_internal_bss *scan, *tmp;
Ben Greear37c73b52012-10-26 14:49:25 -07001095 struct cfg80211_beacon_registration *reg, *treg;
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001096 rfkill_destroy(rdev->wiphy.rfkill);
Ben Greear37c73b52012-10-26 14:49:25 -07001097 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1098 list_del(&reg->list);
1099 kfree(reg);
1100 }
Johannes Berg79c97e92009-07-07 03:56:12 +02001101 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
Johannes Berg5b112d32013-02-01 01:49:58 +01001102 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
Johannes Berga05829a2021-01-22 16:19:43 +01001103 mutex_destroy(&rdev->wiphy.mtx);
Johannes Berge53e9822021-09-27 13:11:06 +02001104
1105 /*
1106 * The 'regd' can only be non-NULL if we never finished
1107 * initializing the wiphy and thus never went through the
1108 * unregister path - e.g. in failure scenarios. Thus, it
1109 * cannot have been visible to anyone if non-NULL, so we
1110 * can just free it here.
1111 */
1112 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1113
Johannes Berg79c97e92009-07-07 03:56:12 +02001114 kfree(rdev);
Johannes Berg704232c2007-04-23 12:20:05 -07001115}
1116
1117void wiphy_free(struct wiphy *wiphy)
1118{
1119 put_device(&wiphy->dev);
1120}
1121EXPORT_SYMBOL(wiphy_free);
1122
Emmanuel Grumbach6f779a62021-03-22 22:46:31 +02001123void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1124 enum rfkill_hard_block_reasons reason)
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001125{
Zhao, Gangf26cbf42014-04-21 12:53:03 +08001126 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001127
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001128 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
Johannes Berg3cfe91c2019-08-30 14:24:44 +03001129 schedule_work(&rdev->rfkill_block);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001130}
Emmanuel Grumbach6f779a62021-03-22 22:46:31 +02001131EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001132
Andrew Zaborowski4a4b8162017-02-10 10:02:31 +01001133void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1134{
1135 kfree(wdev->cqm_config);
1136 wdev->cqm_config = NULL;
1137}
1138
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001139static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1140 bool unregister_netdev)
Johannes Berg98104fde2012-06-16 00:19:54 +02001141{
Zhao, Gangf26cbf42014-04-21 12:53:03 +08001142 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
Johannes Berg7b0a0e32022-04-14 16:50:57 +02001143 unsigned int link_id;
Johannes Berg98104fde2012-06-16 00:19:54 +02001144
1145 ASSERT_RTNL();
Johannes Berga05829a2021-01-22 16:19:43 +01001146 lockdep_assert_held(&rdev->wiphy.mtx);
Johannes Berg98104fde2012-06-16 00:19:54 +02001147
Johannes Berg733504242019-02-06 08:03:10 +02001148 flush_work(&wdev->pmsr_free_wk);
1149
Denis Kenzior7f8ed012016-08-03 16:58:35 -05001150 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1151
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001152 wdev->registered = false;
1153
1154 if (wdev->netdev) {
1155 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1156 if (unregister_netdev)
1157 unregister_netdevice(wdev->netdev);
1158 }
1159
Johannes Berg98104fde2012-06-16 00:19:54 +02001160 list_del_rcu(&wdev->list);
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001161 synchronize_net();
Johannes Berg98104fde2012-06-16 00:19:54 +02001162 rdev->devlist_generation++;
1163
Johannes Berg85dd3da2018-10-01 14:09:17 +02001164 cfg80211_mlme_purge_registrations(wdev);
1165
Johannes Berg98104fde2012-06-16 00:19:54 +02001166 switch (wdev->iftype) {
1167 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf9f47522013-03-19 15:04:07 +01001168 cfg80211_stop_p2p_device(rdev, wdev);
Johannes Berg98104fde2012-06-16 00:19:54 +02001169 break;
Ayala Bekercb3b7d82016-09-20 17:31:13 +03001170 case NL80211_IFTYPE_NAN:
1171 cfg80211_stop_nan(rdev, wdev);
1172 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001173 default:
Johannes Berg98104fde2012-06-16 00:19:54 +02001174 break;
1175 }
Andrew Zaborowski4a4b8162017-02-10 10:02:31 +01001176
Johannes Berg85dd3da2018-10-01 14:09:17 +02001177#ifdef CONFIG_CFG80211_WEXT
Waiman Long453431a2020-08-06 23:18:13 -07001178 kfree_sensitive(wdev->wext.keys);
Stefan Bühler56cb31e2019-11-26 11:05:44 +01001179 wdev->wext.keys = NULL;
Johannes Berg85dd3da2018-10-01 14:09:17 +02001180#endif
1181 /* only initialized if we have a netdev */
1182 if (wdev->netdev)
1183 flush_work(&wdev->disconnect_wk);
1184
Andrew Zaborowski4a4b8162017-02-10 10:02:31 +01001185 cfg80211_cqm_config_free(wdev);
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001186
1187 /*
1188 * Ensure that all events have been processed and
1189 * freed.
1190 */
1191 cfg80211_process_wdev_events(wdev);
1192
Johannes Berg7b0a0e32022-04-14 16:50:57 +02001193 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1194 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1195 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
1196 struct cfg80211_internal_bss *curbss;
1197
1198 curbss = wdev->links[link_id].client.current_bss;
1199
1200 if (WARN_ON(curbss)) {
1201 cfg80211_unhold_bss(curbss);
1202 cfg80211_put_bss(wdev->wiphy, &curbss->pub);
1203 wdev->links[link_id].client.current_bss = NULL;
1204 }
1205 }
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001206 }
Johannes Berg7b0a0e32022-04-14 16:50:57 +02001207
1208 wdev->connected = false;
Johannes Berg98104fde2012-06-16 00:19:54 +02001209}
Johannes Berg85dd3da2018-10-01 14:09:17 +02001210
1211void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1212{
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001213 _cfg80211_unregister_wdev(wdev, true);
Johannes Berg85dd3da2018-10-01 14:09:17 +02001214}
Johannes Berg98104fde2012-06-16 00:19:54 +02001215EXPORT_SYMBOL(cfg80211_unregister_wdev);
1216
Johannes Bergf1e3d552014-01-21 00:00:56 +01001217static const struct device_type wiphy_type = {
Marcel Holtmann053a93d2009-10-02 05:15:28 +00001218 .name = "wlan",
1219};
1220
Michal Kaziordbbae262012-06-29 12:47:01 +02001221void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1222 enum nl80211_iftype iftype, int num)
1223{
Johannes Berga05829a2021-01-22 16:19:43 +01001224 lockdep_assert_held(&rdev->wiphy.mtx);
Michal Kaziordbbae262012-06-29 12:47:01 +02001225
1226 rdev->num_running_ifaces += num;
1227 if (iftype == NL80211_IFTYPE_MONITOR)
1228 rdev->num_running_monitor_ifaces += num;
Michal Kaziordbbae262012-06-29 12:47:01 +02001229}
1230
Michal Kaziorf04c2202014-04-09 15:11:01 +02001231void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1232 struct wireless_dev *wdev)
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001233{
1234 struct net_device *dev = wdev->netdev;
Arend Van Sprielca986ad2017-04-21 13:05:00 +01001235 struct cfg80211_sched_scan_request *pos, *tmp;
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001236
Johannes Berga05829a2021-01-22 16:19:43 +01001237 lockdep_assert_held(&rdev->wiphy.mtx);
Michal Kaziorf04c2202014-04-09 15:11:01 +02001238 ASSERT_WDEV_LOCK(wdev);
Barak Bercovitz24d584d2013-12-05 11:21:26 +02001239
Johannes Berg9bb7e0f2018-09-10 13:29:12 +02001240 cfg80211_pmsr_wdev_down(wdev);
1241
Lorenzo Bianconia95bfb82021-11-29 14:11:24 +01001242 cfg80211_stop_background_radar_detection(wdev);
Lorenzo Bianconibc2dfc02021-10-23 11:10:50 +02001243
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001244 switch (wdev->iftype) {
1245 case NL80211_IFTYPE_ADHOC:
Michal Kaziorf04c2202014-04-09 15:11:01 +02001246 __cfg80211_leave_ibss(rdev, dev, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001247 break;
1248 case NL80211_IFTYPE_P2P_CLIENT:
1249 case NL80211_IFTYPE_STATION:
Arend Van Sprielca986ad2017-04-21 13:05:00 +01001250 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1251 list) {
1252 if (dev == pos->dev)
1253 cfg80211_stop_sched_scan_req(rdev, pos, false);
1254 }
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001255
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001256#ifdef CONFIG_CFG80211_WEXT
1257 kfree(wdev->wext.ie);
1258 wdev->wext.ie = NULL;
1259 wdev->wext.ie_len = 0;
1260 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1261#endif
Johannes Berg83739b02013-05-15 17:44:01 +02001262 cfg80211_disconnect(rdev, dev,
1263 WLAN_REASON_DEAUTH_LEAVING, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001264 break;
1265 case NL80211_IFTYPE_MESH_POINT:
Michal Kaziorf04c2202014-04-09 15:11:01 +02001266 __cfg80211_leave_mesh(rdev, dev);
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001267 break;
1268 case NL80211_IFTYPE_AP:
Johannes Berg74418ed2013-07-30 10:11:25 +02001269 case NL80211_IFTYPE_P2P_GO:
Johannes Berg7b0a0e32022-04-14 16:50:57 +02001270 __cfg80211_stop_ap(rdev, dev, -1, true);
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001271 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001272 case NL80211_IFTYPE_OCB:
1273 __cfg80211_leave_ocb(rdev, dev);
1274 break;
Johannes Bergde4fcba2014-10-31 14:16:12 +01001275 case NL80211_IFTYPE_P2P_DEVICE:
Ayala Bekercb3b7d82016-09-20 17:31:13 +03001276 case NL80211_IFTYPE_NAN:
Johannes Bergde4fcba2014-10-31 14:16:12 +01001277 /* cannot happen, has no netdev */
1278 break;
1279 case NL80211_IFTYPE_AP_VLAN:
1280 case NL80211_IFTYPE_MONITOR:
1281 /* nothing to do */
1282 break;
1283 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berge7e05172020-11-09 10:57:47 +01001284 case NL80211_IFTYPE_WDS:
Johannes Bergde4fcba2014-10-31 14:16:12 +01001285 case NUM_NL80211_IFTYPES:
1286 /* invalid */
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001287 break;
1288 }
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001289}
1290
Michal Kaziorf04c2202014-04-09 15:11:01 +02001291void cfg80211_leave(struct cfg80211_registered_device *rdev,
1292 struct wireless_dev *wdev)
1293{
1294 wdev_lock(wdev);
1295 __cfg80211_leave(rdev, wdev);
1296 wdev_unlock(wdev);
1297}
1298
1299void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1300 gfp_t gfp)
1301{
1302 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1303 struct cfg80211_event *ev;
1304 unsigned long flags;
1305
1306 trace_cfg80211_stop_iface(wiphy, wdev);
1307
1308 ev = kzalloc(sizeof(*ev), gfp);
1309 if (!ev)
1310 return;
1311
1312 ev->type = EVENT_STOPPED;
1313
1314 spin_lock_irqsave(&wdev->event_lock, flags);
1315 list_add_tail(&ev->list, &wdev->event_list);
1316 spin_unlock_irqrestore(&wdev->event_lock, flags);
1317 queue_work(cfg80211_wq, &rdev->event_work);
1318}
1319EXPORT_SYMBOL(cfg80211_stop_iface);
1320
Johannes Berg9bdaf3b2020-10-09 13:58:22 +02001321void cfg80211_init_wdev(struct wireless_dev *wdev)
Johannes Berge4d42162018-09-13 14:12:03 +02001322{
1323 mutex_init(&wdev->mtx);
1324 INIT_LIST_HEAD(&wdev->event_list);
1325 spin_lock_init(&wdev->event_lock);
1326 INIT_LIST_HEAD(&wdev->mgmt_registrations);
Johannes Berg9bb7e0f2018-09-10 13:29:12 +02001327 INIT_LIST_HEAD(&wdev->pmsr_list);
1328 spin_lock_init(&wdev->pmsr_lock);
1329 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
Johannes Berge4d42162018-09-13 14:12:03 +02001330
Johannes Berg9bdaf3b2020-10-09 13:58:22 +02001331#ifdef CONFIG_CFG80211_WEXT
1332 wdev->wext.default_key = -1;
1333 wdev->wext.default_mgmt_key = -1;
1334 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1335#endif
1336
1337 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1338 wdev->ps = true;
1339 else
1340 wdev->ps = false;
1341 /* allow mac80211 to determine the timeout */
1342 wdev->ps_timeout = -1;
1343
1344 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1345 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1346 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1347 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1348
1349 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1350}
1351
1352void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1353 struct wireless_dev *wdev)
1354{
Johannes Berga05829a2021-01-22 16:19:43 +01001355 ASSERT_RTNL();
1356 lockdep_assert_held(&rdev->wiphy.mtx);
1357
Johannes Berge4d42162018-09-13 14:12:03 +02001358 /*
1359 * We get here also when the interface changes network namespaces,
1360 * as it's registered into the new one, but we don't want it to
1361 * change ID in that case. Checking if the ID is already assigned
1362 * works, because 0 isn't considered a valid ID and the memory is
1363 * 0-initialized.
1364 */
1365 if (!wdev->identifier)
1366 wdev->identifier = ++rdev->wdev_id;
1367 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1368 rdev->devlist_generation++;
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001369 wdev->registered = true;
Johannes Bergec8f170bc2018-10-01 14:18:31 +02001370
Johannes Berg43076c12021-06-08 11:32:28 +02001371 if (wdev->netdev &&
1372 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1373 "phy80211"))
1374 pr_err("failed to add phy80211 symlink to netdev!\n");
1375
Johannes Bergec8f170bc2018-10-01 14:18:31 +02001376 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
Johannes Berge4d42162018-09-13 14:12:03 +02001377}
1378
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001379int cfg80211_register_netdevice(struct net_device *dev)
1380{
1381 struct wireless_dev *wdev = dev->ieee80211_ptr;
1382 struct cfg80211_registered_device *rdev;
1383 int ret;
1384
1385 ASSERT_RTNL();
1386
1387 if (WARN_ON(!wdev))
1388 return -EINVAL;
1389
1390 rdev = wiphy_to_rdev(wdev->wiphy);
1391
1392 lockdep_assert_held(&rdev->wiphy.mtx);
1393
1394 /* we'll take care of this */
1395 wdev->registered = true;
Johannes Berg40c575d2021-02-01 19:20:50 +01001396 wdev->registering = true;
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001397 ret = register_netdevice(dev);
1398 if (ret)
1399 goto out;
1400
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001401 cfg80211_register_wdev(rdev, wdev);
1402 ret = 0;
1403out:
Johannes Berg40c575d2021-02-01 19:20:50 +01001404 wdev->registering = false;
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001405 if (ret)
1406 wdev->registered = false;
1407 return ret;
1408}
1409EXPORT_SYMBOL(cfg80211_register_netdevice);
1410
Cristian Chilipireac4f60842012-05-08 12:38:53 +03001411static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
Jiri Pirko351638e2013-05-28 01:30:21 +00001412 unsigned long state, void *ptr)
Johannes Berg704232c2007-04-23 12:20:05 -07001413{
Jiri Pirko351638e2013-05-28 01:30:21 +00001414 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Johannes Berg2a783c12009-07-01 21:26:45 +02001415 struct wireless_dev *wdev = dev->ieee80211_ptr;
Johannes Berg704232c2007-04-23 12:20:05 -07001416 struct cfg80211_registered_device *rdev;
Arend Van Sprielca986ad2017-04-21 13:05:00 +01001417 struct cfg80211_sched_scan_request *pos, *tmp;
Johannes Berg704232c2007-04-23 12:20:05 -07001418
Johannes Berg2a783c12009-07-01 21:26:45 +02001419 if (!wdev)
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001420 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -07001421
Zhao, Gangf26cbf42014-04-21 12:53:03 +08001422 rdev = wiphy_to_rdev(wdev->wiphy);
Johannes Berg704232c2007-04-23 12:20:05 -07001423
Johannes Berg2a783c12009-07-01 21:26:45 +02001424 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
Johannes Berg60719ff2008-09-16 14:55:09 +02001425
Johannes Berg704232c2007-04-23 12:20:05 -07001426 switch (state) {
Marcel Holtmann053a93d2009-10-02 05:15:28 +00001427 case NETDEV_POST_INIT:
1428 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
Johannes Berg9bdaf3b2020-10-09 13:58:22 +02001429 wdev->netdev = dev;
1430 /* can only change netns with wiphy */
1431 dev->features |= NETIF_F_NETNS_LOCAL;
1432
1433 cfg80211_init_wdev(wdev);
Marcel Holtmann053a93d2009-10-02 05:15:28 +00001434 break;
Johannes Berg704232c2007-04-23 12:20:05 -07001435 case NETDEV_REGISTER:
Johannes Berga05829a2021-01-22 16:19:43 +01001436 if (!wdev->registered) {
1437 wiphy_lock(&rdev->wiphy);
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001438 cfg80211_register_wdev(rdev, wdev);
Johannes Berga05829a2021-01-22 16:19:43 +01001439 wiphy_unlock(&rdev->wiphy);
1440 }
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001441 break;
1442 case NETDEV_UNREGISTER:
Johannes Berg0ff6ce72009-08-17 12:25:37 +02001443 /*
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001444 * It is possible to get NETDEV_UNREGISTER multiple times,
1445 * so check wdev->registered.
Johannes Berg0ff6ce72009-08-17 12:25:37 +02001446 */
Johannes Berg40c575d2021-02-01 19:20:50 +01001447 if (wdev->registered && !wdev->registering) {
Johannes Berga05829a2021-01-22 16:19:43 +01001448 wiphy_lock(&rdev->wiphy);
Johannes Berg2fe8ef12021-01-22 16:19:42 +01001449 _cfg80211_unregister_wdev(wdev, false);
Johannes Berga05829a2021-01-22 16:19:43 +01001450 wiphy_unlock(&rdev->wiphy);
1451 }
Johannes Berg704232c2007-04-23 12:20:05 -07001452 break;
Johannes Berg04a773a2009-04-19 21:24:32 +02001453 case NETDEV_GOING_DOWN:
Johannes Berga05829a2021-01-22 16:19:43 +01001454 wiphy_lock(&rdev->wiphy);
Stanislaw Gruszka81256962013-02-28 10:55:25 +01001455 cfg80211_leave(rdev, wdev);
Johannes Bergcdf0a0a2022-07-06 09:57:42 +02001456 cfg80211_remove_links(wdev);
Johannes Berga05829a2021-01-22 16:19:43 +01001457 wiphy_unlock(&rdev->wiphy);
Johannes Berg01a0ac42009-08-20 21:36:16 +02001458 break;
1459 case NETDEV_DOWN:
Johannes Berga05829a2021-01-22 16:19:43 +01001460 wiphy_lock(&rdev->wiphy);
Michal Kaziordbbae262012-06-29 12:47:01 +02001461 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
Johannes Berga6173022014-01-22 11:14:18 +02001462 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
Tova Mussaic8cb5b82020-09-18 11:33:13 +02001463 if (WARN_ON(!rdev->scan_req->notified &&
1464 (!rdev->int_scan_req ||
1465 !rdev->int_scan_req->notified)))
Avraham Stern1d762502016-07-05 17:10:13 +03001466 rdev->scan_req->info.aborted = true;
Johannes Bergf9d15d12014-01-22 11:14:19 +02001467 ___cfg80211_scan_done(rdev, false);
Johannes Berga6173022014-01-22 11:14:18 +02001468 }
Johannes Berg5fe231e2013-05-08 21:45:15 +02001469
Arend Van Sprielca986ad2017-04-21 13:05:00 +01001470 list_for_each_entry_safe(pos, tmp,
1471 &rdev->sched_scan_req_list, list) {
zhong jiangd25d0622018-09-08 19:21:28 +08001472 if (WARN_ON(pos->dev == wdev->netdev))
Arend Van Sprielca986ad2017-04-21 13:05:00 +01001473 cfg80211_stop_sched_scan_req(rdev, pos, false);
Johannes Berg5fe231e2013-05-08 21:45:15 +02001474 }
1475
1476 rdev->opencount--;
Johannes Berga05829a2021-01-22 16:19:43 +01001477 wiphy_unlock(&rdev->wiphy);
Johannes Berg5fe231e2013-05-08 21:45:15 +02001478 wake_up(&rdev->dev_wait);
Johannes Berg04a773a2009-04-19 21:24:32 +02001479 break;
1480 case NETDEV_UP:
Johannes Berga05829a2021-01-22 16:19:43 +01001481 wiphy_lock(&rdev->wiphy);
Johannes Berg4290cb42012-07-12 22:19:48 +02001482 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
Johannes Berg667503d2009-07-07 03:56:11 +02001483 wdev_lock(wdev);
Johannes Bergf2129352009-07-01 21:26:56 +02001484 switch (wdev->iftype) {
Johannes Berg29cbe682010-12-03 09:20:44 +01001485#ifdef CONFIG_CFG80211_WEXT
Johannes Bergf2129352009-07-01 21:26:56 +02001486 case NL80211_IFTYPE_ADHOC:
Johannes Bergfffd0932009-07-08 14:22:54 +02001487 cfg80211_ibss_wext_join(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +02001488 break;
Johannes Bergf2129352009-07-01 21:26:56 +02001489 case NL80211_IFTYPE_STATION:
Johannes Bergfffd0932009-07-08 14:22:54 +02001490 cfg80211_mgd_wext_connect(rdev, wdev);
Johannes Berg04a773a2009-04-19 21:24:32 +02001491 break;
Johannes Berg29cbe682010-12-03 09:20:44 +01001492#endif
Javier Cardonac80d5452010-12-16 17:37:49 -08001493#ifdef CONFIG_MAC80211_MESH
Johannes Berg29cbe682010-12-03 09:20:44 +01001494 case NL80211_IFTYPE_MESH_POINT:
Javier Cardonac80d5452010-12-16 17:37:49 -08001495 {
1496 /* backward compat code... */
1497 struct mesh_setup setup;
1498 memcpy(&setup, &default_mesh_setup,
1499 sizeof(setup));
1500 /* back compat only needed for mesh_id */
Johannes Berg7b0a0e32022-04-14 16:50:57 +02001501 setup.mesh_id = wdev->u.mesh.id;
1502 setup.mesh_id_len = wdev->u.mesh.id_up_len;
1503 if (wdev->u.mesh.id_up_len)
Javier Cardonac80d5452010-12-16 17:37:49 -08001504 __cfg80211_join_mesh(rdev, dev,
1505 &setup,
1506 &default_mesh_config);
1507 break;
1508 }
1509#endif
Johannes Bergf2129352009-07-01 21:26:56 +02001510 default:
1511 break;
1512 }
Johannes Berg667503d2009-07-07 03:56:11 +02001513 wdev_unlock(wdev);
Johannes Bergad002392009-08-18 19:51:57 +02001514 rdev->opencount++;
Juuso Oikarinenbf6a0572011-01-31 15:52:58 +02001515
1516 /*
1517 * Configure power management to the driver here so that its
1518 * correctly set also after interface type changes etc.
1519 */
Eliad Peller5966f2d2011-07-19 12:57:13 +03001520 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1521 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
Johannes Bergd4f29972017-02-13 20:53:38 +01001522 rdev->ops->set_power_mgmt &&
1523 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1524 wdev->ps_timeout)) {
1525 /* assume this means it's off */
1526 wdev->ps = false;
1527 }
Johannes Berga05829a2021-01-22 16:19:43 +01001528 wiphy_unlock(&rdev->wiphy);
Johannes Berg2a783c12009-07-01 21:26:45 +02001529 break;
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001530 case NETDEV_PRE_UP:
Manikanta Pubbisettye6f40512019-07-22 12:44:50 +05301531 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1532 wdev->use_4addr, 0))
Johannes Berg0b20633d2009-07-07 03:56:13 +02001533 return notifier_from_errno(-EOPNOTSUPP);
Manikanta Pubbisetty33d915d2019-05-08 14:55:33 +05301534
Emmanuel Grumbach358ae882021-06-16 23:28:26 +03001535 if (rfkill_blocked(rdev->wiphy.rfkill))
Luciano Coelhob6a55012014-02-27 11:07:21 +02001536 return notifier_from_errno(-ERFKILL);
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001537 break;
Zhao, Gang6784c7d2014-04-21 12:53:04 +08001538 default:
1539 return NOTIFY_DONE;
Johannes Berg704232c2007-04-23 12:20:05 -07001540 }
1541
Johannes Bergcb150b92016-01-27 13:29:34 +01001542 wireless_nlevent_flush();
1543
Zhao, Gang6784c7d2014-04-21 12:53:04 +08001544 return NOTIFY_OK;
Johannes Berg704232c2007-04-23 12:20:05 -07001545}
1546
1547static struct notifier_block cfg80211_netdev_notifier = {
1548 .notifier_call = cfg80211_netdev_notifier_call,
1549};
1550
Johannes Berg463d0182009-07-14 00:33:35 +02001551static void __net_exit cfg80211_pernet_exit(struct net *net)
1552{
1553 struct cfg80211_registered_device *rdev;
1554
1555 rtnl_lock();
Johannes Berg463d0182009-07-14 00:33:35 +02001556 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1557 if (net_eq(wiphy_net(&rdev->wiphy), net))
1558 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1559 }
Johannes Berg463d0182009-07-14 00:33:35 +02001560 rtnl_unlock();
1561}
1562
1563static struct pernet_operations cfg80211_pernet_ops = {
1564 .exit = cfg80211_pernet_exit,
1565};
1566
1567static int __init cfg80211_init(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001568{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001569 int err;
1570
Johannes Berg463d0182009-07-14 00:33:35 +02001571 err = register_pernet_device(&cfg80211_pernet_ops);
1572 if (err)
1573 goto out_fail_pernet;
1574
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001575 err = wiphy_sysfs_init();
Johannes Berg704232c2007-04-23 12:20:05 -07001576 if (err)
1577 goto out_fail_sysfs;
1578
1579 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1580 if (err)
1581 goto out_fail_notifier;
1582
Johannes Berg55682962007-09-20 13:09:35 -04001583 err = nl80211_init();
1584 if (err)
1585 goto out_fail_nl80211;
1586
Johannes Berg704232c2007-04-23 12:20:05 -07001587 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1588
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001589 err = regulatory_init();
1590 if (err)
1591 goto out_fail_reg;
1592
Bhaktipriya Shridhare4819012016-08-31 00:35:07 +05301593 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
Wei Yongjunf00f1882013-03-20 20:22:54 +08001594 if (!cfg80211_wq) {
1595 err = -ENOMEM;
Alban Browaeyse60d7442009-11-25 15:13:00 +01001596 goto out_fail_wq;
Wei Yongjunf00f1882013-03-20 20:22:54 +08001597 }
Alban Browaeyse60d7442009-11-25 15:13:00 +01001598
Johannes Berg704232c2007-04-23 12:20:05 -07001599 return 0;
1600
Alban Browaeyse60d7442009-11-25 15:13:00 +01001601out_fail_wq:
1602 regulatory_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001603out_fail_reg:
1604 debugfs_remove(ieee80211_debugfs_dir);
Junjie Mao81daf732015-01-28 10:03:26 +08001605 nl80211_exit();
Johannes Berg55682962007-09-20 13:09:35 -04001606out_fail_nl80211:
1607 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
Johannes Berg704232c2007-04-23 12:20:05 -07001608out_fail_notifier:
1609 wiphy_sysfs_exit();
1610out_fail_sysfs:
Johannes Berg463d0182009-07-14 00:33:35 +02001611 unregister_pernet_device(&cfg80211_pernet_ops);
1612out_fail_pernet:
Johannes Berg704232c2007-04-23 12:20:05 -07001613 return err;
1614}
Johannes Berg007f6c52015-10-15 11:22:58 +02001615fs_initcall(cfg80211_init);
Johannes Berg704232c2007-04-23 12:20:05 -07001616
Uwe Kleine-Königf884e382010-06-18 09:38:54 +02001617static void __exit cfg80211_exit(void)
Johannes Berg704232c2007-04-23 12:20:05 -07001618{
1619 debugfs_remove(ieee80211_debugfs_dir);
Johannes Berg55682962007-09-20 13:09:35 -04001620 nl80211_exit();
Johannes Berg704232c2007-04-23 12:20:05 -07001621 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1622 wiphy_sysfs_exit();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001623 regulatory_exit();
Johannes Berg463d0182009-07-14 00:33:35 +02001624 unregister_pernet_device(&cfg80211_pernet_ops);
Alban Browaeyse60d7442009-11-25 15:13:00 +01001625 destroy_workqueue(cfg80211_wq);
Johannes Berg704232c2007-04-23 12:20:05 -07001626}
1627module_exit(cfg80211_exit);