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Merge tag 'backlight-next-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / net / wireless / core.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
704232c2
JB		 2/*
3 * This is the linux wireless configuration interface.
4 *
5f2aa25e 5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
2740f0cf 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c4cbaf79 7 * Copyright 2015-2017 Intel Deutschland GmbH
461ce35d 8 * Copyright (C) 2018-2020 Intel Corporation
704232c2
JB		 9 */
10
e9c0268f
JP		 11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
704232c2
JB		 13#include <linux/if.h>
14#include <linux/module.h>
15#include <linux/err.h>
704232c2 16#include <linux/list.h>
5a0e3ad6 17#include <linux/slab.h>
704232c2
JB		 18#include <linux/nl80211.h>
19#include <linux/debugfs.h>
20#include <linux/notifier.h>
21#include <linux/device.h>
16a832e7 22#include <linux/etherdevice.h>
1f87f7d3 23#include <linux/rtnetlink.h>
d43c36dc 24#include <linux/sched.h>
704232c2
JB		 25#include <net/genetlink.h>
26#include <net/cfg80211.h>
55682965 27#include "nl80211.h"
704232c2
JB		 28#include "core.h"
29#include "sysfs.h"
1ac61302 30#include "debugfs.h"
a9a11622 31#include "wext-compat.h"
e35e4d28 32#include "rdev-ops.h"
704232c2
JB		 33
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");
fb4e1568 40MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
704232c2 41
5fe231e8 42/* RCU-protected (and RTNL for writers) */
79c97e97 43LIST_HEAD(cfg80211_rdev_list);
f5ea9120 44int cfg80211_rdev_list_generation;
a1794390 45
704232c2
JB		 46/* for debugfs */
47static struct dentry *ieee80211_debugfs_dir;
48
e60d7443
AB		 49/* for the cleanup, scan and event works */
50struct workqueue_struct *cfg80211_wq;
51
40db6c77
AK		 52static 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
79c97e97 57struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
55682965 58{
79c97e97 59 struct cfg80211_registered_device *result = NULL, *rdev;
55682965 60
5fe231e8 61 ASSERT_RTNL();
761cf7ec 62
79c97e97
JB		 63 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
64 if (rdev->wiphy_idx == wiphy_idx) {
65 result = rdev;
55682965
JB		 66 break;
67 }
68 }
69
70 return result;
71}
72
806a9e39
LR		 73int get_wiphy_idx(struct wiphy *wiphy)
74{
f26cbf40 75 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
f4173766 76
79c97e97 77 return rdev->wiphy_idx;
806a9e39
LR		 78}
79
806a9e39
LR		 80struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
81{
79c97e97 82 struct cfg80211_registered_device *rdev;
806a9e39 83
5fe231e8 84 ASSERT_RTNL();
806a9e39 85
79c97e97
JB		 86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
87 if (!rdev)
806a9e39 88 return NULL;
79c97e97 89 return &rdev->wiphy;
806a9e39
LR		 90}
91
1998d90a
BG		 92static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
93 const char *newname)
55682965 94{
79c97e97 95 struct cfg80211_registered_device *rdev2;
1998d90a 96 int wiphy_idx, taken = -1, digits;
55682965 97
5fe231e8 98 ASSERT_RTNL();
2940bb69 99
a7cfebcb
JB		 100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
101 return -EINVAL;
102
7623225f
JB		 103 /* 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
1998d90a
BG		 118 /* Ensure another device does not already have this name. */
119 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
120 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
121 return -EINVAL;
122
123 return 0;
124}
125
126int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
127 char *newname)
128{
129 int result;
130
131 ASSERT_RTNL();
7623225f 132
2940bb69 133 /* Ignore nop renames */
1998d90a 134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
4bbf4d56 135 return 0;
2940bb69 136
1998d90a
BG		 137 result = cfg80211_dev_check_name(rdev, newname);
138 if (result < 0)
139 return result;
55682965 140
55682965
JB		 141 result = device_rename(&rdev->wiphy.dev, newname);
142 if (result)
4bbf4d56 143 return result;
55682965 144
0bbab5f0 145 if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir))
d82574a8
GKH		 146 debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
147 rdev->wiphy.debugfsdir,
148 rdev->wiphy.debugfsdir->d_parent, newname);
55682965 149
3bb20556 150 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
55682965 151
4bbf4d56 152 return 0;
55682965
JB		 153}
154
463d0183
JB		 155int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
156 struct net *net)
157{
158 struct wireless_dev *wdev;
159 int err = 0;
160
5be83de5 161 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
463d0183
JB		 162 return -EOPNOTSUPP;
163
53873f13 164 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
ba22fb5b
JB		 165 if (!wdev->netdev)
166 continue;
463d0183
JB		 167 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
53873f13
JB		 178 list_for_each_entry_continue_reverse(wdev,
179 &rdev->wiphy.wdev_list,
463d0183 180 list) {
ba22fb5b
JB		 181 if (!wdev->netdev)
182 continue;
463d0183
JB		 183 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 }
04600794
JB		 189
190 return err;
463d0183
JB		 191 }
192
c90b670b
MW		 193 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
463d0183
JB		 200 wiphy_net_set(&rdev->wiphy, net);
201
04600794
JB		 202 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
203 WARN_ON(err);
204
c90b670b
MW		 205 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
04600794 212 return 0;
463d0183
JB		 213}
214
1f87f7d3
JB		 215static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
216{
79c97e97 217 struct cfg80211_registered_device *rdev = data;
1f87f7d3 218
e35e4d28 219 rdev_rfkill_poll(rdev);
1f87f7d3
JB		 220}
221
f9f47529
JB		 222void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
223 struct wireless_dev *wdev)
224{
a05829a7 225 lockdep_assert_held(&rdev->wiphy.mtx);
f9f47529
JB		 226
227 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
228 return;
229
73c7da3d 230 if (!wdev_running(wdev))
f9f47529
JB		 231 return;
232
233 rdev_stop_p2p_device(rdev, wdev);
73c7da3d 234 wdev->is_running = false;
f9f47529
JB		 235
236 rdev->opencount--;
237
a617302c 238 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
c8cb5b85
TM		 239 if (WARN_ON(!rdev->scan_req->notified &&
240 (!rdev->int_scan_req ||
241 !rdev->int_scan_req->notified)))
1d76250b 242 rdev->scan_req->info.aborted = true;
f9d15d16 243 ___cfg80211_scan_done(rdev, false);
a617302c 244 }
f9f47529
JB		 245}
246
cb3b7d87
AB		 247void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
248 struct wireless_dev *wdev)
249{
a05829a7 250 lockdep_assert_held(&rdev->wiphy.mtx);
cb3b7d87
AB		 251
252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
253 return;
254
73c7da3d 255 if (!wdev_running(wdev))
cb3b7d87
AB		 256 return;
257
258 rdev_stop_nan(rdev, wdev);
73c7da3d 259 wdev->is_running = false;
cb3b7d87
AB		 260
261 rdev->opencount--;
262}
263
f6837ba8 264void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
1f87f7d3 265{
f6837ba8 266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1f87f7d3
JB		 267 struct wireless_dev *wdev;
268
f6837ba8 269 ASSERT_RTNL();
f9f47529 270
53873f13 271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
98104fde 272 if (wdev->netdev) {
ba22fb5b 273 dev_close(wdev->netdev);
98104fde
JB		 274 continue;
275 }
a05829a7 276
98104fde 277 /* otherwise, check iftype */
a05829a7
JB		 278
279 wiphy_lock(wiphy);
280
98104fde
JB		 281 switch (wdev->iftype) {
282 case NL80211_IFTYPE_P2P_DEVICE:
f9f47529 283 cfg80211_stop_p2p_device(rdev, wdev);
98104fde 284 break;
cb3b7d87
AB		 285 case NL80211_IFTYPE_NAN:
286 cfg80211_stop_nan(rdev, wdev);
287 break;
98104fde
JB		 288 default:
289 break;
290 }
a05829a7
JB		 291
292 wiphy_unlock(wiphy);
98104fde 293 }
f6837ba8
JB		 294}
295EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
1f87f7d3 296
f6837ba8
JB		 297static 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);
1f87f7d3
JB		 306 rtnl_unlock();
307
308 return 0;
309}
310
3cfe91c4 311static void cfg80211_rfkill_block_work(struct work_struct *work)
1f87f7d3 312{
79c97e97 313 struct cfg80211_registered_device *rdev;
1f87f7d3 314
3cfe91c4
JB		 315 rdev = container_of(work, struct cfg80211_registered_device,
316 rfkill_block);
317 cfg80211_rfkill_set_block(rdev, true);
1f87f7d3
JB		 318}
319
667503dd
JB		 320static void cfg80211_event_work(struct work_struct *work)
321{
322 struct cfg80211_registered_device *rdev;
667503dd
JB		 323
324 rdev = container_of(work, struct cfg80211_registered_device,
325 event_work);
326
a05829a7 327 wiphy_lock(&rdev->wiphy);
3d54d255 328 cfg80211_process_rdev_events(rdev);
a05829a7 329 wiphy_unlock(&rdev->wiphy);
667503dd
JB		 330}
331
78f22b6a
JB		 332void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
333{
ab81007a 334 struct wireless_dev *wdev, *tmp;
ea6b2098 335 bool found = false;
78f22b6a
JB		 336
337 ASSERT_RTNL();
338
ea6b2098
JB		 339 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
340 if (wdev->nl_owner_dead) {
341 if (wdev->netdev)
342 dev_close(wdev->netdev);
343 found = true;
344 }
345 }
346
347 if (!found)
348 return;
349
350 wiphy_lock(&rdev->wiphy);
ab81007a 351 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
ea6b2098
JB		 352 if (wdev->nl_owner_dead) {
353 cfg80211_leave(rdev, wdev);
ab81007a 354 rdev_del_virtual_intf(rdev, wdev);
ea6b2098 355 }
78f22b6a 356 }
ea6b2098 357 wiphy_unlock(&rdev->wiphy);
78f22b6a
JB		 358}
359
360static void cfg80211_destroy_iface_wk(struct work_struct *work)
361{
362 struct cfg80211_registered_device *rdev;
363
364 rdev = container_of(work, struct cfg80211_registered_device,
365 destroy_work);
366
367 rtnl_lock();
368 cfg80211_destroy_ifaces(rdev);
369 rtnl_unlock();
370}
371
93a1e86c
JR		 372static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
373{
374 struct cfg80211_registered_device *rdev;
ca986ad9 375 struct cfg80211_sched_scan_request *req, *tmp;
93a1e86c
JR		 376
377 rdev = container_of(work, struct cfg80211_registered_device,
378 sched_scan_stop_wk);
379
380 rtnl_lock();
ca986ad9
AVS		 381 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
382 if (req->nl_owner_dead)
383 cfg80211_stop_sched_scan_req(rdev, req, false);
384 }
93a1e86c
JR		 385 rtnl_unlock();
386}
387
89766727
VT		 388static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
389{
390 struct cfg80211_registered_device *rdev;
391
392 rdev = container_of(work, struct cfg80211_registered_device,
393 propagate_radar_detect_wk);
394
395 rtnl_lock();
396
397 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
398 NL80211_DFS_UNAVAILABLE,
399 NL80211_RADAR_DETECTED);
400
401 rtnl_unlock();
402}
403
404static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
405{
406 struct cfg80211_registered_device *rdev;
407
408 rdev = container_of(work, struct cfg80211_registered_device,
409 propagate_cac_done_wk);
410
411 rtnl_lock();
412
413 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
414 NL80211_DFS_AVAILABLE,
415 NL80211_RADAR_CAC_FINISHED);
416
417 rtnl_unlock();
418}
419
704232c2
JB		 420/* exported functions */
421
1998d90a
BG		 422struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
423 const char *requested_name)
704232c2 424{
73810b77 425 static atomic_t wiphy_counter = ATOMIC_INIT(0);
7623225f
JB		 426
427 struct cfg80211_registered_device *rdev;
704232c2
JB		 428 int alloc_size;
429
0b20633d
JB		 430 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
431 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
432 WARN_ON(ops->connect && !ops->disconnect);
433 WARN_ON(ops->join_ibss && !ops->leave_ibss);
434 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
435 WARN_ON(ops->add_station && !ops->del_station);
436 WARN_ON(ops->add_mpath && !ops->del_mpath);
29cbe68c 437 WARN_ON(ops->join_mesh && !ops->leave_mesh);
de3bb771
OO		 438 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
439 WARN_ON(ops->start_ap && !ops->stop_ap);
440 WARN_ON(ops->join_ocb && !ops->leave_ocb);
441 WARN_ON(ops->suspend && !ops->resume);
442 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
443 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
444 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
445 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
41ade00f 446
79c97e97 447 alloc_size = sizeof(*rdev) + sizeof_priv;
704232c2 448
79c97e97
JB		 449 rdev = kzalloc(alloc_size, GFP_KERNEL);
450 if (!rdev)
704232c2
JB		 451 return NULL;
452
79c97e97 453 rdev->ops = ops;
704232c2 454
73810b77 455 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
a4d73ee1 456
f4173766 457 if (unlikely(rdev->wiphy_idx < 0)) {
7623225f 458 /* ugh, wrapped! */
73810b77 459 atomic_dec(&wiphy_counter);
79c97e97 460 kfree(rdev);
704232c2
JB		 461 return NULL;
462 }
704232c2 463
9b881963
JB		 464 /* atomic_inc_return makes it start at 1, make it start at 0 */
465 rdev->wiphy_idx--;
466
7623225f 467 /* give it a proper name */
1998d90a
BG		 468 if (requested_name && requested_name[0]) {
469 int rv;
470
471 rtnl_lock();
472 rv = cfg80211_dev_check_name(rdev, requested_name);
473
474 if (rv < 0) {
475 rtnl_unlock();
476 goto use_default_name;
477 }
478
479 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
480 rtnl_unlock();
481 if (rv)
482 goto use_default_name;
483 } else {
59b179b4
JB		 484 int rv;
485
1998d90a
BG		 486use_default_name:
487 /* NOTE: This is *probably* safe w/out holding rtnl because of
488 * the restrictions on phy names. Probably this call could
489 * fail if some other part of the kernel (re)named a device
490 * phyX. But, might should add some locking and check return
491 * value, and use a different name if this one exists?
492 */
59b179b4
JB		 493 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
494 if (rv < 0) {
495 kfree(rdev);
496 return NULL;
497 }
1998d90a 498 }
7623225f 499
a05829a7 500 mutex_init(&rdev->wiphy.mtx);
53873f13 501 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
37c73b5f
BG		 502 INIT_LIST_HEAD(&rdev->beacon_registrations);
503 spin_lock_init(&rdev->beacon_registrations_lock);
79c97e97
JB		 504 spin_lock_init(&rdev->bss_lock);
505 INIT_LIST_HEAD(&rdev->bss_list);
ca986ad9 506 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
79c97e97 507 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
04f39047
SW		 508 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
509 cfg80211_dfs_channels_update_work);
3d23e349
JB		 510#ifdef CONFIG_CFG80211_WEXT
511 rdev->wiphy.wext = &cfg80211_wext_handler;
512#endif
513
79c97e97
JB		 514 device_initialize(&rdev->wiphy.dev);
515 rdev->wiphy.dev.class = &ieee80211_class;
516 rdev->wiphy.dev.platform_data = rdev;
9f0e1354 517 device_enable_async_suspend(&rdev->wiphy.dev);
79c97e97 518
78f22b6a 519 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
93a1e86c 520 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
b34939b9 521 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
89766727
VT		 522 INIT_WORK(&rdev->propagate_radar_detect_wk,
523 cfg80211_propagate_radar_detect_wk);
524 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
79ea1e12
JB		 525 INIT_WORK(&rdev->mgmt_registrations_update_wk,
526 cfg80211_mgmt_registrations_update_wk);
78f22b6a 527
5be83de5
JB		 528#ifdef CONFIG_CFG80211_DEFAULT_PS
529 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
530#endif
16cb9d42 531
463d0183
JB		 532 wiphy_net_set(&rdev->wiphy, &init_net);
533
79c97e97
JB		 534 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
535 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
536 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
537 &rdev->rfkill_ops, rdev);
538
539 if (!rdev->rfkill) {
4f488fbc 540 wiphy_free(&rdev->wiphy);
1f87f7d3
JB		 541 return NULL;
542 }
543
3cfe91c4 544 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
79c97e97
JB		 545 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
546 INIT_WORK(&rdev->event_work, cfg80211_event_work);
1f87f7d3 547
ad002395
JB		 548 init_waitqueue_head(&rdev->dev_wait);
549
b9a5f8ca
JM		 550 /*
551 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
552 * Fragmentation and RTS threshold are disabled by default with the
553 * special -1 value.
554 */
79c97e97
JB		 555 rdev->wiphy.retry_short = 7;
556 rdev->wiphy.retry_long = 4;
557 rdev->wiphy.frag_threshold = (u32) -1;
558 rdev->wiphy.rts_threshold = (u32) -1;
81077e82 559 rdev->wiphy.coverage_class = 0;
b9a5f8ca 560
9a774c78
AO		 561 rdev->wiphy.max_num_csa_counters = 1;
562
3b06d277
AS		 563 rdev->wiphy.max_sched_scan_plans = 1;
564 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
565
79c97e97 566 return &rdev->wiphy;
704232c2 567}
1998d90a 568EXPORT_SYMBOL(wiphy_new_nm);
704232c2 569
7527a782
JB		 570static int wiphy_verify_combinations(struct wiphy *wiphy)
571{
572 const struct ieee80211_iface_combination *c;
573 int i, j;
574
7527a782
JB		 575 for (i = 0; i < wiphy->n_iface_combinations; i++) {
576 u32 cnt = 0;
577 u16 all_iftypes = 0;
578
579 c = &wiphy->iface_combinations[i];
580
11c4a075
SW		 581 /*
582 * Combinations with just one interface aren't real,
583 * however we make an exception for DFS.
584 */
585 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
7527a782
JB		 586 return -EINVAL;
587
588 /* Need at least one channel */
589 if (WARN_ON(!c->num_different_channels))
590 return -EINVAL;
591
d4e50c59
MK		 592 /*
593 * Put a sane limit on maximum number of different
594 * channels to simplify channel accounting code.
595 */
596 if (WARN_ON(c->num_different_channels >
597 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
598 return -EINVAL;
599
11c4a075
SW		 600 /* DFS only works on one channel. */
601 if (WARN_ON(c->radar_detect_widths &&
602 (c->num_different_channels > 1)))
603 return -EINVAL;
604
7527a782
JB		 605 if (WARN_ON(!c->n_limits))
606 return -EINVAL;
607
608 for (j = 0; j < c->n_limits; j++) {
609 u16 types = c->limits[j].types;
610
b6a55015 611 /* interface types shouldn't overlap */
7527a782
JB		 612 if (WARN_ON(types & all_iftypes))
613 return -EINVAL;
614 all_iftypes |= types;
615
616 if (WARN_ON(!c->limits[j].max))
617 return -EINVAL;
618
619 /* Shouldn't list software iftypes in combinations! */
620 if (WARN_ON(wiphy->software_iftypes & types))
621 return -EINVAL;
622
98104fde
JB		 623 /* Only a single P2P_DEVICE can be allowed */
624 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
625 c->limits[j].max > 1))
626 return -EINVAL;
627
cb3b7d87
AB		 628 /* Only a single NAN can be allowed */
629 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
630 c->limits[j].max > 1))
631 return -EINVAL;
632
56271da2
JB		 633 /*
634 * This isn't well-defined right now. If you have an
635 * IBSS interface, then its beacon interval may change
636 * by joining other networks, and nothing prevents it
637 * from doing that.
638 * So technically we probably shouldn't even allow AP
639 * and IBSS in the same interface, but it seems that
640 * some drivers support that, possibly only with fixed
641 * beacon intervals for IBSS.
642 */
643 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
644 c->beacon_int_min_gcd)) {
645 return -EINVAL;
646 }
647
7527a782
JB		 648 cnt += c->limits[j].max;
649 /*
650 * Don't advertise an unsupported type
651 * in a combination.
652 */
653 if (WARN_ON((wiphy->interface_modes & types) != types))
654 return -EINVAL;
655 }
656
8f205423
JB		 657 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
658 return -EINVAL;
8f205423 659
7527a782
JB		 660 /* You can't even choose that many! */
661 if (WARN_ON(cnt < c->max_interfaces))
662 return -EINVAL;
663 }
664
665 return 0;
666}
667
704232c2
JB		 668int wiphy_register(struct wiphy *wiphy)
669{
f26cbf40 670 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
704232c2 671 int res;
57fbcce3 672 enum nl80211_band band;
8318d78a
JB		 673 struct ieee80211_supported_band *sband;
674 bool have_band = false;
675 int i;
f59ac048
LR		 676 u16 ifmodes = wiphy->interface_modes;
677
dfb89c56 678#ifdef CONFIG_PM
964dc9e2
JB		 679 if (WARN_ON(wiphy->wowlan &&
680 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
681 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
682 return -EINVAL;
683 if (WARN_ON(wiphy->wowlan &&
684 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
685 !wiphy->wowlan->tcp))
77dbbb13 686 return -EINVAL;
dfb89c56 687#endif
1057d35e
AN		 688 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
689 (!rdev->ops->tdls_channel_switch ||
690 !rdev->ops->tdls_cancel_channel_switch)))
691 return -EINVAL;
77dbbb13 692
cb3b7d87 693 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
a442b761 694 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
8585989d
LC		 695 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
696 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
cb3b7d87
AB		 697 return -EINVAL;
698
8f205423
JB		 699 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
700 return -EINVAL;
8f205423 701
9bb7e0f2
JB		 702 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
703 return -EINVAL;
704
705 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
706 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
707 !wiphy->pmsr_capa->ftm.non_asap))
708 return -EINVAL;
709 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
710 !wiphy->pmsr_capa->ftm.bandwidths))
711 return -EINVAL;
712 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
713 ~(BIT(NL80211_PREAMBLE_LEGACY) |
714 BIT(NL80211_PREAMBLE_HT) |
715 BIT(NL80211_PREAMBLE_VHT) |
efb5520d 716 BIT(NL80211_PREAMBLE_HE) |
9bb7e0f2
JB		 717 BIT(NL80211_PREAMBLE_DMG))))
718 return -EINVAL;
efb5520d
AS		 719 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
720 wiphy->pmsr_capa->ftm.non_trigger_based) &&
721 !(wiphy->pmsr_capa->ftm.preambles &
722 BIT(NL80211_PREAMBLE_HE))))
723 return -EINVAL;
9bb7e0f2
JB		 724 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
725 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
726 BIT(NL80211_CHAN_WIDTH_20) |
727 BIT(NL80211_CHAN_WIDTH_40) |
728 BIT(NL80211_CHAN_WIDTH_80) |
729 BIT(NL80211_CHAN_WIDTH_80P80) |
730 BIT(NL80211_CHAN_WIDTH_160) |
731 BIT(NL80211_CHAN_WIDTH_5) |
732 BIT(NL80211_CHAN_WIDTH_10))))
733 return -EINVAL;
734 }
735
ad932f04
AN		 736 /*
737 * if a wiphy has unsupported modes for regulatory channel enforcement,
738 * opt-out of enforcement checking
739 */
740 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
741 BIT(NL80211_IFTYPE_P2P_CLIENT) |
742 BIT(NL80211_IFTYPE_AP) |
743 BIT(NL80211_IFTYPE_P2P_GO) |
744 BIT(NL80211_IFTYPE_ADHOC) |
745 BIT(NL80211_IFTYPE_P2P_DEVICE) |
cb3b7d87 746 BIT(NL80211_IFTYPE_NAN) |
ad932f04
AN		 747 BIT(NL80211_IFTYPE_AP_VLAN) |
748 BIT(NL80211_IFTYPE_MONITOR)))
749 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
750
b0d7aa59
JD		 751 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
752 (wiphy->regulatory_flags &
753 (REGULATORY_CUSTOM_REG |
754 REGULATORY_STRICT_REG |
755 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
756 REGULATORY_COUNTRY_IE_IGNORE))))
757 return -EINVAL;
758
be29b99a
AK		 759 if (WARN_ON(wiphy->coalesce &&
760 (!wiphy->coalesce->n_rules ||
761 !wiphy->coalesce->n_patterns) &&
762 (!wiphy->coalesce->pattern_min_len ||
763 wiphy->coalesce->pattern_min_len >
764 wiphy->coalesce->pattern_max_len)))
765 return -EINVAL;
766
562a7480
JB		 767 if (WARN_ON(wiphy->ap_sme_capa &&
768 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
769 return -EINVAL;
770
ef15aac6
JB		 771 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
772 return -EINVAL;
773
774 if (WARN_ON(wiphy->addresses &&
775 !is_zero_ether_addr(wiphy->perm_addr) &&
776 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
777 ETH_ALEN)))
778 return -EINVAL;
779
77765eaf
VT		 780 if (WARN_ON(wiphy->max_acl_mac_addrs &&
781 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
782 !rdev->ops->set_mac_acl)))
783 return -EINVAL;
784
38de03d2
AS		 785 /* assure only valid behaviours are flagged by driver
786 * hence subtract 2 as bit 0 is invalid.
787 */
788 if (WARN_ON(wiphy->bss_select_support &&
789 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
790 return -EINVAL;
791
3a00df57
AS		 792 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
793 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
794 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
795 return -EINVAL;
796
7f9a3e15
VK		 797 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
798 rdev->ops->update_connect_params))
799 return -EINVAL;
800
ef15aac6
JB		 801 if (wiphy->addresses)
802 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
803
f59ac048
LR		 804 /* sanity check ifmodes */
805 WARN_ON(!ifmodes);
2e161f78 806 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
f59ac048
LR		 807 if (WARN_ON(ifmodes != wiphy->interface_modes))
808 wiphy->interface_modes = ifmodes;
8318d78a 809
7527a782
JB		 810 res = wiphy_verify_combinations(wiphy);
811 if (res)
812 return res;
813
8318d78a 814 /* sanity check supported bands/channels */
57fbcce3 815 for (band = 0; band < NUM_NL80211_BANDS; band++) {
c4cbaf79 816 u16 types = 0;
f4381365 817 bool have_he = false;
c4cbaf79 818
8318d78a
JB		 819 sband = wiphy->bands[band];
820 if (!sband)
821 continue;
822
823 sband->band = band;
3a0c52a6
VK		 824 if (WARN_ON(!sband->n_channels))
825 return -EINVAL;
826 /*
df78a0c0 827 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
3a0c52a6
VK		 828 * n_bitrates is 0
829 */
df78a0c0
TP		 830 if (WARN_ON((band != NL80211_BAND_60GHZ &&
831 band != NL80211_BAND_S1GHZ) &&
3a0c52a6 832 !sband->n_bitrates))
881d948c
JB		 833 return -EINVAL;
834
461ce35d
JB		 835 if (WARN_ON(band == NL80211_BAND_6GHZ &&
836 (sband->ht_cap.ht_supported ||
837 sband->vht_cap.vht_supported)))
838 return -EINVAL;
839
40db6c77
AK		 840 /*
841 * Since cfg80211_disable_40mhz_24ghz is global, we can
842 * modify the sband's ht data even if the driver uses a
843 * global structure for that.
844 */
845 if (cfg80211_disable_40mhz_24ghz &&
57fbcce3 846 band == NL80211_BAND_2GHZ &&
40db6c77
AK		 847 sband->ht_cap.ht_supported) {
848 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
849 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
850 }
851
881d948c
JB		 852 /*
853 * Since we use a u32 for rate bitmaps in
854 * ieee80211_get_response_rate, we cannot
855 * have more than 32 legacy rates.
856 */
857 if (WARN_ON(sband->n_bitrates > 32))
8318d78a 858 return -EINVAL;
8318d78a
JB		 859
860 for (i = 0; i < sband->n_channels; i++) {
861 sband->channels[i].orig_flags =
862 sband->channels[i].flags;
c4a9fafc 863 sband->channels[i].orig_mag = INT_MAX;
8318d78a
JB		 864 sband->channels[i].orig_mpwr =
865 sband->channels[i].max_power;
866 sband->channels[i].band = band;
be689f68
JB		 867
868 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
869 return -EINVAL;
8318d78a
JB		 870 }
871
c4cbaf79
LC		 872 for (i = 0; i < sband->n_iftype_data; i++) {
873 const struct ieee80211_sband_iftype_data *iftd;
874
875 iftd = &sband->iftype_data[i];
876
877 if (WARN_ON(!iftd->types_mask))
878 return -EINVAL;
879 if (WARN_ON(types & iftd->types_mask))
880 return -EINVAL;
881
882 /* at least one piece of information must be present */
883 if (WARN_ON(!iftd->he_cap.has_he))
884 return -EINVAL;
885
886 types |= iftd->types_mask;
f4381365
JB		 887
888 if (i == 0)
889 have_he = iftd->he_cap.has_he;
890 else
891 have_he = have_he &&
892 iftd->he_cap.has_he;
c4cbaf79
LC		 893 }
894
f4381365
JB		 895 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
896 return -EINVAL;
897
8318d78a
JB		 898 have_band = true;
899 }
900
901 if (!have_band) {
902 WARN_ON(1);
903 return -EINVAL;
904 }
905
901bb989
JB		 906 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
907 /*
908 * Validate we have a policy (can be explicitly set to
909 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
910 * we have at least one of doit/dumpit.
911 */
912 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
913 return -EINVAL;
914 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
915 !rdev->wiphy.vendor_commands[i].dumpit))
916 return -EINVAL;
917 }
918
dfb89c56 919#ifdef CONFIG_PM
964dc9e2
JB		 920 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
921 (!rdev->wiphy.wowlan->pattern_min_len ||
922 rdev->wiphy.wowlan->pattern_min_len >
923 rdev->wiphy.wowlan->pattern_max_len)))
924 return -EINVAL;
dfb89c56 925#endif
ff1b6e69 926
8318d78a
JB		 927 /* check and set up bitrates */
928 ieee80211_set_bitrate_flags(wiphy);
929
00c3a6ed
JB		 930 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
931
aa5f66d5 932 rtnl_lock();
79c97e97 933 res = device_add(&rdev->wiphy.dev);
c3d34d5d 934 if (res) {
aa5f66d5 935 rtnl_unlock();
c3d34d5d
JL		 936 return res;
937 }
1f87f7d3 938
2f0accc1 939 /* set up regulatory info */
57b5ce07 940 wiphy_regulatory_register(wiphy);
2f0accc1 941
5f2aa25e 942 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
f5ea9120 943 cfg80211_rdev_list_generation++;
704232c2
JB		 944
945 /* add to debugfs */
d82574a8
GKH		 946 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
947 ieee80211_debugfs_dir);
704232c2 948
a796dac9
TB		 949 cfg80211_debugfs_rdev_add(rdev);
950 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
951
a2f73b6c 952 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
73d54c9e
LR		 953 struct regulatory_request request;
954
955 request.wiphy_idx = get_wiphy_idx(wiphy);
956 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
957 request.alpha2[0] = '9';
958 request.alpha2[1] = '9';
959
960 nl80211_send_reg_change_event(&request);
961 }
962
019ae3a9
KV		 963 /* Check that nobody globally advertises any capabilities they do not
964 * advertise on all possible interface types.
965 */
966 if (wiphy->extended_capabilities_len &&
967 wiphy->num_iftype_ext_capab &&
968 wiphy->iftype_ext_capab) {
969 u8 supported_on_all, j;
970 const struct wiphy_iftype_ext_capab *capab;
971
972 capab = wiphy->iftype_ext_capab;
973 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
974 if (capab[0].extended_capabilities_len > j)
975 supported_on_all =
976 capab[0].extended_capabilities[j];
977 else
978 supported_on_all = 0x00;
979 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
980 if (j >= capab[i].extended_capabilities_len) {
981 supported_on_all = 0x00;
982 break;
983 }
984 supported_on_all &=
985 capab[i].extended_capabilities[j];
986 }
987 if (WARN_ON(wiphy->extended_capabilities[j] &
988 ~supported_on_all))
989 break;
990 }
991 }
992
ecb44335
SG		 993 rdev->wiphy.registered = true;
994 rtnl_unlock();
aa5f66d5
JB		 995
996 res = rfkill_register(rdev->rfkill);
997 if (res) {
998 rfkill_destroy(rdev->rfkill);
999 rdev->rfkill = NULL;
1000 wiphy_unregister(&rdev->wiphy);
1001 return res;
1002 }
1003
2f0accc1 1004 return 0;
704232c2
JB		 1005}
1006EXPORT_SYMBOL(wiphy_register);
1007
1f87f7d3
JB		 1008void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1009{
f26cbf40 1010 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1f87f7d3 1011
79c97e97 1012 if (!rdev->ops->rfkill_poll)
1f87f7d3 1013 return;
79c97e97
JB		 1014 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1015 rfkill_resume_polling(rdev->rfkill);
1f87f7d3
JB		 1016}
1017EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1018
1019void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
1020{
f26cbf40 1021 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1f87f7d3 1022
79c97e97 1023 rfkill_pause_polling(rdev->rfkill);
1f87f7d3
JB		 1024}
1025EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
1026
704232c2
JB		 1027void wiphy_unregister(struct wiphy *wiphy)
1028{
f26cbf40 1029 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
704232c2 1030
ad002395
JB		 1031 wait_event(rdev->dev_wait, ({
1032 int __count;
a05829a7 1033 wiphy_lock(&rdev->wiphy);
ad002395 1034 __count = rdev->opencount;
a05829a7 1035 wiphy_unlock(&rdev->wiphy);
c4f60846 1036 __count == 0; }));
ad002395 1037
aa5f66d5
JB		 1038 if (rdev->rfkill)
1039 rfkill_unregister(rdev->rfkill);
256c90de 1040
5fe231e8 1041 rtnl_lock();
a05829a7 1042 wiphy_lock(&rdev->wiphy);
3bb20556 1043 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
5fe231e8
JB		 1044 rdev->wiphy.registered = false;
1045
53873f13 1046 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
ad002395
JB		 1047
1048 /*
1049 * First remove the hardware from everywhere, this makes
1050 * it impossible to find from userspace.
1051 */
7bcfaf2f 1052 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
5f2aa25e
JB		 1053 list_del_rcu(&rdev->list);
1054 synchronize_rcu();
f16bfc1c 1055
bfead080
LR		 1056 /*
1057 * If this device got a regulatory hint tell core its
1058 * free to listen now to a new shiny device regulatory hint
1059 */
1060 wiphy_regulatory_deregister(wiphy);
3f2355cb 1061
f5ea9120 1062 cfg80211_rdev_list_generation++;
79c97e97 1063 device_del(&rdev->wiphy.dev);
704232c2 1064
a05829a7 1065 wiphy_unlock(&rdev->wiphy);
5fe231e8 1066 rtnl_unlock();
6682588a 1067
36e6fea8 1068 flush_work(&rdev->scan_done_wk);
6682588a 1069 cancel_work_sync(&rdev->conn_work);
6682588a 1070 flush_work(&rdev->event_work);
04f39047 1071 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
78f22b6a 1072 flush_work(&rdev->destroy_work);
93a1e86c 1073 flush_work(&rdev->sched_scan_stop_wk);
89766727
VT		 1074 flush_work(&rdev->propagate_radar_detect_wk);
1075 flush_work(&rdev->propagate_cac_done_wk);
79ea1e12 1076 flush_work(&rdev->mgmt_registrations_update_wk);
6d52563f 1077
6abb9cb9
JB		 1078#ifdef CONFIG_PM
1079 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
e35e4d28 1080 rdev_set_wakeup(rdev, false);
6abb9cb9 1081#endif
6d52563f 1082 cfg80211_rdev_free_wowlan(rdev);
be29b99a 1083 cfg80211_rdev_free_coalesce(rdev);
704232c2
JB		 1084}
1085EXPORT_SYMBOL(wiphy_unregister);
1086
79c97e97 1087void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
704232c2 1088{
2a519311 1089 struct cfg80211_internal_bss *scan, *tmp;
37c73b5f 1090 struct cfg80211_beacon_registration *reg, *treg;
79c97e97 1091 rfkill_destroy(rdev->rfkill);
37c73b5f
BG		 1092 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1093 list_del(&reg->list);
1094 kfree(reg);
1095 }
79c97e97 1096 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
5b112d3d 1097 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
a05829a7 1098 mutex_destroy(&rdev->wiphy.mtx);
79c97e97 1099 kfree(rdev);
704232c2
JB		 1100}
1101
1102void wiphy_free(struct wiphy *wiphy)
1103{
1104 put_device(&wiphy->dev);
1105}
1106EXPORT_SYMBOL(wiphy_free);
1107
1f87f7d3
JB		 1108void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
1109{
f26cbf40 1110 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1f87f7d3 1111
79c97e97 1112 if (rfkill_set_hw_state(rdev->rfkill, blocked))
3cfe91c4 1113 schedule_work(&rdev->rfkill_block);
1f87f7d3
JB		 1114}
1115EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
1116
4a4b8169
AZ		 1117void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1118{
1119 kfree(wdev->cqm_config);
1120 wdev->cqm_config = NULL;
1121}
1122
2fe8ef10
JB		 1123static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1124 bool unregister_netdev)
98104fde 1125{
f26cbf40 1126 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
98104fde
JB		 1127
1128 ASSERT_RTNL();
a05829a7 1129 lockdep_assert_held(&rdev->wiphy.mtx);
98104fde 1130
73350424
JB		 1131 flush_work(&wdev->pmsr_free_wk);
1132
7f8ed01e
DK		 1133 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1134
2fe8ef10
JB		 1135 wdev->registered = false;
1136
1137 if (wdev->netdev) {
1138 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1139 if (unregister_netdev)
1140 unregister_netdevice(wdev->netdev);
1141 }
1142
98104fde 1143 list_del_rcu(&wdev->list);
2fe8ef10 1144 synchronize_net();
98104fde
JB		 1145 rdev->devlist_generation++;
1146
85dd3da4
JB		 1147 cfg80211_mlme_purge_registrations(wdev);
1148
98104fde
JB		 1149 switch (wdev->iftype) {
1150 case NL80211_IFTYPE_P2P_DEVICE:
f9f47529 1151 cfg80211_stop_p2p_device(rdev, wdev);
98104fde 1152 break;
cb3b7d87
AB		 1153 case NL80211_IFTYPE_NAN:
1154 cfg80211_stop_nan(rdev, wdev);
1155 break;
98104fde 1156 default:
98104fde
JB		 1157 break;
1158 }
4a4b8169 1159
85dd3da4 1160#ifdef CONFIG_CFG80211_WEXT
453431a5 1161 kfree_sensitive(wdev->wext.keys);
56cb31e1 1162 wdev->wext.keys = NULL;
85dd3da4
JB		 1163#endif
1164 /* only initialized if we have a netdev */
1165 if (wdev->netdev)
1166 flush_work(&wdev->disconnect_wk);
1167
4a4b8169 1168 cfg80211_cqm_config_free(wdev);
2fe8ef10
JB		 1169
1170 /*
1171 * Ensure that all events have been processed and
1172 * freed.
1173 */
1174 cfg80211_process_wdev_events(wdev);
1175
1176 if (WARN_ON(wdev->current_bss)) {
1177 cfg80211_unhold_bss(wdev->current_bss);
1178 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1179 wdev->current_bss = NULL;
1180 }
98104fde 1181}
85dd3da4
JB		 1182
1183void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1184{
2fe8ef10 1185 _cfg80211_unregister_wdev(wdev, true);
85dd3da4 1186}
98104fde
JB		 1187EXPORT_SYMBOL(cfg80211_unregister_wdev);
1188
f1e3d556 1189static const struct device_type wiphy_type = {
053a93dd
MH		 1190 .name = "wlan",
1191};
1192
dbbae26a
MK		 1193void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1194 enum nl80211_iftype iftype, int num)
1195{
a05829a7 1196 lockdep_assert_held(&rdev->wiphy.mtx);
dbbae26a
MK		 1197
1198 rdev->num_running_ifaces += num;
1199 if (iftype == NL80211_IFTYPE_MONITOR)
1200 rdev->num_running_monitor_ifaces += num;
dbbae26a
MK		 1201}
1202
f04c2203
MK		 1203void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1204 struct wireless_dev *wdev)
81256969
SG		 1205{
1206 struct net_device *dev = wdev->netdev;
ca986ad9 1207 struct cfg80211_sched_scan_request *pos, *tmp;
81256969 1208
a05829a7 1209 lockdep_assert_held(&rdev->wiphy.mtx);
f04c2203 1210 ASSERT_WDEV_LOCK(wdev);
24d584d7 1211
9bb7e0f2
JB		 1212 cfg80211_pmsr_wdev_down(wdev);
1213
81256969
SG		 1214 switch (wdev->iftype) {
1215 case NL80211_IFTYPE_ADHOC:
f04c2203 1216 __cfg80211_leave_ibss(rdev, dev, true);
81256969
SG		 1217 break;
1218 case NL80211_IFTYPE_P2P_CLIENT:
1219 case NL80211_IFTYPE_STATION:
ca986ad9
AVS		 1220 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1221 list) {
1222 if (dev == pos->dev)
1223 cfg80211_stop_sched_scan_req(rdev, pos, false);
1224 }
81256969 1225
81256969
SG		 1226#ifdef CONFIG_CFG80211_WEXT
1227 kfree(wdev->wext.ie);
1228 wdev->wext.ie = NULL;
1229 wdev->wext.ie_len = 0;
1230 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1231#endif
83739b03
JB		 1232 cfg80211_disconnect(rdev, dev,
1233 WLAN_REASON_DEAUTH_LEAVING, true);
81256969
SG		 1234 break;
1235 case NL80211_IFTYPE_MESH_POINT:
f04c2203 1236 __cfg80211_leave_mesh(rdev, dev);
81256969
SG		 1237 break;
1238 case NL80211_IFTYPE_AP:
74418ede 1239 case NL80211_IFTYPE_P2P_GO:
f04c2203 1240 __cfg80211_stop_ap(rdev, dev, true);
81256969 1241 break;
6e0bd6c3
RL		 1242 case NL80211_IFTYPE_OCB:
1243 __cfg80211_leave_ocb(rdev, dev);
1244 break;
de4fcbad 1245 case NL80211_IFTYPE_P2P_DEVICE:
cb3b7d87 1246 case NL80211_IFTYPE_NAN:
de4fcbad
JB		 1247 /* cannot happen, has no netdev */
1248 break;
1249 case NL80211_IFTYPE_AP_VLAN:
1250 case NL80211_IFTYPE_MONITOR:
1251 /* nothing to do */
1252 break;
1253 case NL80211_IFTYPE_UNSPECIFIED:
e7e0517c 1254 case NL80211_IFTYPE_WDS:
de4fcbad
JB		 1255 case NUM_NL80211_IFTYPES:
1256 /* invalid */
81256969
SG		 1257 break;
1258 }
81256969
SG		 1259}
1260
f04c2203
MK		 1261void cfg80211_leave(struct cfg80211_registered_device *rdev,
1262 struct wireless_dev *wdev)
1263{
1264 wdev_lock(wdev);
1265 __cfg80211_leave(rdev, wdev);
1266 wdev_unlock(wdev);
1267}
1268
1269void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1270 gfp_t gfp)
1271{
1272 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1273 struct cfg80211_event *ev;
1274 unsigned long flags;
1275
1276 trace_cfg80211_stop_iface(wiphy, wdev);
1277
1278 ev = kzalloc(sizeof(*ev), gfp);
1279 if (!ev)
1280 return;
1281
1282 ev->type = EVENT_STOPPED;
1283
1284 spin_lock_irqsave(&wdev->event_lock, flags);
1285 list_add_tail(&ev->list, &wdev->event_list);
1286 spin_unlock_irqrestore(&wdev->event_lock, flags);
1287 queue_work(cfg80211_wq, &rdev->event_work);
1288}
1289EXPORT_SYMBOL(cfg80211_stop_iface);
1290
9bdaf3b9 1291void cfg80211_init_wdev(struct wireless_dev *wdev)
e4d4216e
JB		 1292{
1293 mutex_init(&wdev->mtx);
1294 INIT_LIST_HEAD(&wdev->event_list);
1295 spin_lock_init(&wdev->event_lock);
1296 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1297 spin_lock_init(&wdev->mgmt_registrations_lock);
9bb7e0f2
JB		 1298 INIT_LIST_HEAD(&wdev->pmsr_list);
1299 spin_lock_init(&wdev->pmsr_lock);
1300 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
e4d4216e 1301
9bdaf3b9
JB		 1302#ifdef CONFIG_CFG80211_WEXT
1303 wdev->wext.default_key = -1;
1304 wdev->wext.default_mgmt_key = -1;
1305 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1306#endif
1307
1308 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1309 wdev->ps = true;
1310 else
1311 wdev->ps = false;
1312 /* allow mac80211 to determine the timeout */
1313 wdev->ps_timeout = -1;
1314
1315 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1316 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1317 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1318 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1319
1320 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1321}
1322
1323void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1324 struct wireless_dev *wdev)
1325{
a05829a7
JB		 1326 ASSERT_RTNL();
1327 lockdep_assert_held(&rdev->wiphy.mtx);
1328
e4d4216e
JB		 1329 /*
1330 * We get here also when the interface changes network namespaces,
1331 * as it's registered into the new one, but we don't want it to
1332 * change ID in that case. Checking if the ID is already assigned
1333 * works, because 0 isn't considered a valid ID and the memory is
1334 * 0-initialized.
1335 */
1336 if (!wdev->identifier)
1337 wdev->identifier = ++rdev->wdev_id;
1338 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1339 rdev->devlist_generation++;
2fe8ef10 1340 wdev->registered = true;
ec8f170b
JB		 1341
1342 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
e4d4216e
JB		 1343}
1344
2fe8ef10
JB		 1345int cfg80211_register_netdevice(struct net_device *dev)
1346{
1347 struct wireless_dev *wdev = dev->ieee80211_ptr;
1348 struct cfg80211_registered_device *rdev;
1349 int ret;
1350
1351 ASSERT_RTNL();
1352
1353 if (WARN_ON(!wdev))
1354 return -EINVAL;
1355
1356 rdev = wiphy_to_rdev(wdev->wiphy);
1357
1358 lockdep_assert_held(&rdev->wiphy.mtx);
1359
1360 /* we'll take care of this */
1361 wdev->registered = true;
40c575d1 1362 wdev->registering = true;
2fe8ef10
JB		 1363 ret = register_netdevice(dev);
1364 if (ret)
1365 goto out;
1366
1367 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1368 "phy80211")) {
1369 pr_err("failed to add phy80211 symlink to netdev!\n");
1370 unregister_netdevice(dev);
1371 ret = -EINVAL;
1372 goto out;
1373 }
1374
1375 cfg80211_register_wdev(rdev, wdev);
1376 ret = 0;
1377out:
40c575d1 1378 wdev->registering = false;
2fe8ef10
JB		 1379 if (ret)
1380 wdev->registered = false;
1381 return ret;
1382}
1383EXPORT_SYMBOL(cfg80211_register_netdevice);
1384
c4f60846 1385static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
351638e7 1386 unsigned long state, void *ptr)
704232c2 1387{
351638e7 1388 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2a783c13 1389 struct wireless_dev *wdev = dev->ieee80211_ptr;
704232c2 1390 struct cfg80211_registered_device *rdev;
ca986ad9 1391 struct cfg80211_sched_scan_request *pos, *tmp;
704232c2 1392
2a783c13 1393 if (!wdev)
1f87f7d3 1394 return NOTIFY_DONE;
704232c2 1395
f26cbf40 1396 rdev = wiphy_to_rdev(wdev->wiphy);
704232c2 1397
2a783c13 1398 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
60719ffd 1399
704232c2 1400 switch (state) {
053a93dd
MH		 1401 case NETDEV_POST_INIT:
1402 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
9bdaf3b9
JB		 1403 wdev->netdev = dev;
1404 /* can only change netns with wiphy */
1405 dev->features |= NETIF_F_NETNS_LOCAL;
1406
1407 cfg80211_init_wdev(wdev);
053a93dd 1408 break;
704232c2 1409 case NETDEV_REGISTER:
a05829a7
JB		 1410 if (!wdev->registered) {
1411 wiphy_lock(&rdev->wiphy);
2fe8ef10 1412 cfg80211_register_wdev(rdev, wdev);
a05829a7
JB		 1413 wiphy_unlock(&rdev->wiphy);
1414 }
2fe8ef10
JB		 1415 break;
1416 case NETDEV_UNREGISTER:
0ff6ce7b 1417 /*
2fe8ef10
JB		 1418 * It is possible to get NETDEV_UNREGISTER multiple times,
1419 * so check wdev->registered.
0ff6ce7b 1420 */
40c575d1 1421 if (wdev->registered && !wdev->registering) {
a05829a7 1422 wiphy_lock(&rdev->wiphy);
2fe8ef10 1423 _cfg80211_unregister_wdev(wdev, false);
a05829a7
JB		 1424 wiphy_unlock(&rdev->wiphy);
1425 }
704232c2 1426 break;
04a773ad 1427 case NETDEV_GOING_DOWN:
a05829a7 1428 wiphy_lock(&rdev->wiphy);
81256969 1429 cfg80211_leave(rdev, wdev);
a05829a7 1430 wiphy_unlock(&rdev->wiphy);
01a0ac41
JB		 1431 break;
1432 case NETDEV_DOWN:
a05829a7 1433 wiphy_lock(&rdev->wiphy);
dbbae26a 1434 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
a617302c 1435 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
c8cb5b85
TM		 1436 if (WARN_ON(!rdev->scan_req->notified &&
1437 (!rdev->int_scan_req ||
1438 !rdev->int_scan_req->notified)))
1d76250b 1439 rdev->scan_req->info.aborted = true;
f9d15d16 1440 ___cfg80211_scan_done(rdev, false);
a617302c 1441 }
5fe231e8 1442
ca986ad9
AVS		 1443 list_for_each_entry_safe(pos, tmp,
1444 &rdev->sched_scan_req_list, list) {
d25d062f 1445 if (WARN_ON(pos->dev == wdev->netdev))
ca986ad9 1446 cfg80211_stop_sched_scan_req(rdev, pos, false);
5fe231e8
JB		 1447 }
1448
1449 rdev->opencount--;
a05829a7 1450 wiphy_unlock(&rdev->wiphy);
5fe231e8 1451 wake_up(&rdev->dev_wait);
04a773ad
JB		 1452 break;
1453 case NETDEV_UP:
a05829a7 1454 wiphy_lock(&rdev->wiphy);
4290cb4b 1455 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
667503dd 1456 wdev_lock(wdev);
f2129354 1457 switch (wdev->iftype) {
29cbe68c 1458#ifdef CONFIG_CFG80211_WEXT
f2129354 1459 case NL80211_IFTYPE_ADHOC:
fffd0934 1460 cfg80211_ibss_wext_join(rdev, wdev);
04a773ad 1461 break;
f2129354 1462 case NL80211_IFTYPE_STATION:
fffd0934 1463 cfg80211_mgd_wext_connect(rdev, wdev);
f2129354 1464 break;
29cbe68c 1465#endif
c80d545d 1466#ifdef CONFIG_MAC80211_MESH
29cbe68c 1467 case NL80211_IFTYPE_MESH_POINT:
c80d545d
JC		 1468 {
1469 /* backward compat code... */
1470 struct mesh_setup setup;
1471 memcpy(&setup, &default_mesh_setup,
1472 sizeof(setup));
1473 /* back compat only needed for mesh_id */
1474 setup.mesh_id = wdev->ssid;
1475 setup.mesh_id_len = wdev->mesh_id_up_len;
1476 if (wdev->mesh_id_up_len)
1477 __cfg80211_join_mesh(rdev, dev,
1478 &setup,
1479 &default_mesh_config);
1480 break;
1481 }
1482#endif
f2129354 1483 default:
04a773ad 1484 break;
f2129354 1485 }
667503dd 1486 wdev_unlock(wdev);
ad002395 1487 rdev->opencount++;
bf6a0579
JO		 1488
1489 /*
1490 * Configure power management to the driver here so that its
1491 * correctly set also after interface type changes etc.
1492 */
5966f2dd
EP		 1493 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1494 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
d4f29978
JB		 1495 rdev->ops->set_power_mgmt &&
1496 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1497 wdev->ps_timeout)) {
1498 /* assume this means it's off */
1499 wdev->ps = false;
1500 }
a05829a7 1501 wiphy_unlock(&rdev->wiphy);
2a783c13 1502 break;
1f87f7d3 1503 case NETDEV_PRE_UP:
e6f40511
MP		 1504 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1505 wdev->use_4addr, 0))
0b20633d 1506 return notifier_from_errno(-EOPNOTSUPP);
33d915d9 1507
b6a55015
LC		 1508 if (rfkill_blocked(rdev->rfkill))
1509 return notifier_from_errno(-ERFKILL);
1f87f7d3 1510 break;
6784c7db
ZG		 1511 default:
1512 return NOTIFY_DONE;
704232c2
JB		 1513 }
1514
cb150b9d
JB		 1515 wireless_nlevent_flush();
1516
6784c7db 1517 return NOTIFY_OK;
704232c2
JB		 1518}
1519
1520static struct notifier_block cfg80211_netdev_notifier = {
1521 .notifier_call = cfg80211_netdev_notifier_call,
1522};
1523
463d0183
JB		 1524static void __net_exit cfg80211_pernet_exit(struct net *net)
1525{
1526 struct cfg80211_registered_device *rdev;
1527
1528 rtnl_lock();
463d0183
JB		 1529 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1530 if (net_eq(wiphy_net(&rdev->wiphy), net))
1531 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1532 }
463d0183
JB		 1533 rtnl_unlock();
1534}
1535
1536static struct pernet_operations cfg80211_pernet_ops = {
1537 .exit = cfg80211_pernet_exit,
1538};
1539
1540static int __init cfg80211_init(void)
704232c2 1541{
b2e1b302
LR		 1542 int err;
1543
463d0183
JB		 1544 err = register_pernet_device(&cfg80211_pernet_ops);
1545 if (err)
1546 goto out_fail_pernet;
1547
b2e1b302 1548 err = wiphy_sysfs_init();
704232c2
JB		 1549 if (err)
1550 goto out_fail_sysfs;
1551
1552 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1553 if (err)
1554 goto out_fail_notifier;
1555
55682965
JB		 1556 err = nl80211_init();
1557 if (err)
1558 goto out_fail_nl80211;
1559
704232c2
JB		 1560 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1561
b2e1b302
LR		 1562 err = regulatory_init();
1563 if (err)
1564 goto out_fail_reg;
1565
e4819013 1566 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
f00f188f
WY		 1567 if (!cfg80211_wq) {
1568 err = -ENOMEM;
e60d7443 1569 goto out_fail_wq;
f00f188f 1570 }
e60d7443 1571
704232c2
JB		 1572 return 0;
1573
e60d7443
AB		 1574out_fail_wq:
1575 regulatory_exit();
b2e1b302
LR		 1576out_fail_reg:
1577 debugfs_remove(ieee80211_debugfs_dir);
81daf735 1578 nl80211_exit();
55682965
JB		 1579out_fail_nl80211:
1580 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
704232c2
JB		 1581out_fail_notifier:
1582 wiphy_sysfs_exit();
1583out_fail_sysfs:
463d0183
JB		 1584 unregister_pernet_device(&cfg80211_pernet_ops);
1585out_fail_pernet:
704232c2
JB		 1586 return err;
1587}
007f6c5e 1588fs_initcall(cfg80211_init);
704232c2 1589
f884e387 1590static void __exit cfg80211_exit(void)
704232c2
JB		 1591{
1592 debugfs_remove(ieee80211_debugfs_dir);
55682965 1593 nl80211_exit();
704232c2
JB		 1594 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1595 wiphy_sysfs_exit();
b2e1b302 1596 regulatory_exit();
463d0183 1597 unregister_pernet_device(&cfg80211_pernet_ops);
e60d7443 1598 destroy_workqueue(cfg80211_wq);
704232c2
JB		 1599}
1600module_exit(cfg80211_exit);
Linux 6.x block layer and io_uring tree(s)