1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This is the linux wireless configuration interface.
4 *
5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2025 Intel Corporation
9 */
10
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13 #include <linux/if.h>
14 #include <linux/module.h>
15 #include <linux/err.h>
16 #include <linux/list.h>
17 #include <linux/slab.h>
18 #include <linux/nl80211.h>
19 #include <linux/debugfs.h>
20 #include <linux/notifier.h>
21 #include <linux/device.h>
22 #include <linux/etherdevice.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/sched.h>
25 #include <net/genetlink.h>
26 #include <net/cfg80211.h>
27 #include "nl80211.h"
28 #include "core.h"
29 #include "sysfs.h"
30 #include "debugfs.h"
31 #include "wext-compat.h"
32 #include "rdev-ops.h"
33
34 /* name for sysfs, %d is appended */
35 #define PHY_NAME "phy"
36
37 /* maximum length of radio debugfs directory name */
38 #define RADIO_DEBUGFSDIR_MAX_LEN 8
39
40 MODULE_AUTHOR("Johannes Berg");
41 MODULE_LICENSE("GPL");
42 MODULE_DESCRIPTION("wireless configuration support");
43 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
44
45 /* RCU-protected (and RTNL for writers) */
46 LIST_HEAD(cfg80211_rdev_list);
47 int cfg80211_rdev_list_generation;
48
49 /* for debugfs */
50 static struct dentry *ieee80211_debugfs_dir;
51
52 /* for the cleanup, scan and event works */
53 struct workqueue_struct *cfg80211_wq;
54
55 static bool cfg80211_disable_40mhz_24ghz;
56 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
57 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
58 "Disable 40MHz support in the 2.4GHz band");
59
cfg80211_rdev_by_wiphy_idx(int wiphy_idx)60 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
61 {
62 struct cfg80211_registered_device *result = NULL, *rdev;
63
64 ASSERT_RTNL();
65
66 for_each_rdev(rdev) {
67 if (rdev->wiphy_idx == wiphy_idx) {
68 result = rdev;
69 break;
70 }
71 }
72
73 return result;
74 }
75
get_wiphy_idx(struct wiphy * wiphy)76 int get_wiphy_idx(struct wiphy *wiphy)
77 {
78 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
79
80 return rdev->wiphy_idx;
81 }
82
wiphy_idx_to_wiphy(int wiphy_idx)83 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
84 {
85 struct cfg80211_registered_device *rdev;
86
87 ASSERT_RTNL();
88
89 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
90 if (!rdev)
91 return NULL;
92 return &rdev->wiphy;
93 }
94
cfg80211_dev_check_name(struct cfg80211_registered_device * rdev,const char * newname)95 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
96 const char *newname)
97 {
98 struct cfg80211_registered_device *rdev2;
99 int wiphy_idx, taken = -1, digits;
100
101 ASSERT_RTNL();
102
103 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
104 return -EINVAL;
105
106 /* prohibit calling the thing phy%d when %d is not its number */
107 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
108 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
109 /* count number of places needed to print wiphy_idx */
110 digits = 1;
111 while (wiphy_idx /= 10)
112 digits++;
113 /*
114 * deny the name if it is phy<idx> where <idx> is printed
115 * without leading zeroes. taken == strlen(newname) here
116 */
117 if (taken == strlen(PHY_NAME) + digits)
118 return -EINVAL;
119 }
120
121 /* Ensure another device does not already have this name. */
122 for_each_rdev(rdev2)
123 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
124 return -EINVAL;
125
126 return 0;
127 }
128
cfg80211_dev_rename(struct cfg80211_registered_device * rdev,char * newname)129 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
130 char *newname)
131 {
132 int result;
133
134 ASSERT_RTNL();
135 lockdep_assert_wiphy(&rdev->wiphy);
136
137 /* Ignore nop renames */
138 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
139 return 0;
140
141 result = cfg80211_dev_check_name(rdev, newname);
142 if (result < 0)
143 return result;
144
145 result = device_rename(&rdev->wiphy.dev, newname);
146 if (result)
147 return result;
148
149 debugfs_change_name(rdev->wiphy.debugfsdir, "%s", newname);
150
151 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
152
153 return 0;
154 }
155
cfg80211_switch_netns(struct cfg80211_registered_device * rdev,struct net * net)156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
157 struct net *net)
158 {
159 struct wireless_dev *wdev;
160 int err = 0;
161
162 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
163 return -EOPNOTSUPP;
164
165 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
166 if (!wdev->netdev)
167 continue;
168 wdev->netdev->netns_immutable = false;
169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
170 if (err)
171 break;
172 wdev->netdev->netns_immutable = true;
173 }
174
175 if (err) {
176 /* failed -- clean up to old netns */
177 net = wiphy_net(&rdev->wiphy);
178
179 list_for_each_entry_continue_reverse(wdev,
180 &rdev->wiphy.wdev_list,
181 list) {
182 if (!wdev->netdev)
183 continue;
184 wdev->netdev->netns_immutable = false;
185 err = dev_change_net_namespace(wdev->netdev, net,
186 "wlan%d");
187 WARN_ON(err);
188 wdev->netdev->netns_immutable = true;
189 }
190
191 return err;
192 }
193
194 guard(wiphy)(&rdev->wiphy);
195
196 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
197 if (!wdev->netdev)
198 continue;
199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
200 }
201
202 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
203
204 wiphy_net_set(&rdev->wiphy, net);
205
206 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
207 WARN_ON(err);
208
209 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
210
211 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
212 if (!wdev->netdev)
213 continue;
214 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
215 }
216
217 return 0;
218 }
219
cfg80211_rfkill_poll(struct rfkill * rfkill,void * data)220 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
221 {
222 struct cfg80211_registered_device *rdev = data;
223
224 guard(wiphy)(&rdev->wiphy);
225
226 rdev_rfkill_poll(rdev);
227 }
228
cfg80211_stop_p2p_device(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)229 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
230 struct wireless_dev *wdev)
231 {
232 lockdep_assert_held(&rdev->wiphy.mtx);
233
234 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
235 return;
236
237 if (!wdev_running(wdev))
238 return;
239
240 rdev_stop_p2p_device(rdev, wdev);
241 wdev->is_running = false;
242
243 rdev->opencount--;
244
245 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
246 if (WARN_ON(!rdev->scan_req->notified &&
247 (!rdev->int_scan_req ||
248 !rdev->int_scan_req->notified)))
249 rdev->scan_req->info.aborted = true;
250 ___cfg80211_scan_done(rdev, false);
251 }
252 }
253
cfg80211_stop_nan(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)254 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
255 struct wireless_dev *wdev)
256 {
257 lockdep_assert_held(&rdev->wiphy.mtx);
258
259 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
260 return;
261
262 if (!wdev_running(wdev))
263 return;
264
265 rdev_stop_nan(rdev, wdev);
266 wdev->is_running = false;
267
268 rdev->opencount--;
269 }
270
cfg80211_shutdown_all_interfaces(struct wiphy * wiphy)271 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
272 {
273 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
274 struct wireless_dev *wdev;
275
276 ASSERT_RTNL();
277
278 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
279 if (wdev->netdev) {
280 dev_close(wdev->netdev);
281 continue;
282 }
283
284 /* otherwise, check iftype */
285
286 guard(wiphy)(wiphy);
287
288 switch (wdev->iftype) {
289 case NL80211_IFTYPE_P2P_DEVICE:
290 cfg80211_stop_p2p_device(rdev, wdev);
291 break;
292 case NL80211_IFTYPE_NAN:
293 cfg80211_stop_nan(rdev, wdev);
294 break;
295 default:
296 break;
297 }
298 }
299 }
300 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
301
cfg80211_rfkill_set_block(void * data,bool blocked)302 static int cfg80211_rfkill_set_block(void *data, bool blocked)
303 {
304 struct cfg80211_registered_device *rdev = data;
305
306 if (!blocked)
307 return 0;
308
309 rtnl_lock();
310 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
311 rtnl_unlock();
312
313 return 0;
314 }
315
cfg80211_rfkill_block_work(struct work_struct * work)316 static void cfg80211_rfkill_block_work(struct work_struct *work)
317 {
318 struct cfg80211_registered_device *rdev;
319
320 rdev = container_of(work, struct cfg80211_registered_device,
321 rfkill_block);
322 cfg80211_rfkill_set_block(rdev, true);
323 }
324
cfg80211_event_work(struct work_struct * work)325 static void cfg80211_event_work(struct work_struct *work)
326 {
327 struct cfg80211_registered_device *rdev;
328
329 rdev = container_of(work, struct cfg80211_registered_device,
330 event_work);
331
332 guard(wiphy)(&rdev->wiphy);
333
334 cfg80211_process_rdev_events(rdev);
335 }
336
cfg80211_destroy_ifaces(struct cfg80211_registered_device * rdev)337 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
338 {
339 struct wireless_dev *wdev, *tmp;
340
341 ASSERT_RTNL();
342
343 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
344 if (wdev->nl_owner_dead) {
345 if (wdev->netdev)
346 dev_close(wdev->netdev);
347
348 guard(wiphy)(&rdev->wiphy);
349
350 cfg80211_leave(rdev, wdev);
351 cfg80211_remove_virtual_intf(rdev, wdev);
352 }
353 }
354 }
355
cfg80211_destroy_iface_wk(struct work_struct * work)356 static void cfg80211_destroy_iface_wk(struct work_struct *work)
357 {
358 struct cfg80211_registered_device *rdev;
359
360 rdev = container_of(work, struct cfg80211_registered_device,
361 destroy_work);
362
363 rtnl_lock();
364 cfg80211_destroy_ifaces(rdev);
365 rtnl_unlock();
366 }
367
cfg80211_sched_scan_stop_wk(struct wiphy * wiphy,struct wiphy_work * work)368 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy,
369 struct wiphy_work *work)
370 {
371 struct cfg80211_registered_device *rdev;
372 struct cfg80211_sched_scan_request *req, *tmp;
373
374 rdev = container_of(work, struct cfg80211_registered_device,
375 sched_scan_stop_wk);
376
377 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
378 if (req->nl_owner_dead)
379 cfg80211_stop_sched_scan_req(rdev, req, false);
380 }
381 }
382
cfg80211_propagate_radar_detect_wk(struct work_struct * work)383 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
384 {
385 struct cfg80211_registered_device *rdev;
386
387 rdev = container_of(work, struct cfg80211_registered_device,
388 propagate_radar_detect_wk);
389
390 rtnl_lock();
391
392 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
393 NL80211_DFS_UNAVAILABLE,
394 NL80211_RADAR_DETECTED);
395
396 rtnl_unlock();
397 }
398
cfg80211_propagate_cac_done_wk(struct work_struct * work)399 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
400 {
401 struct cfg80211_registered_device *rdev;
402
403 rdev = container_of(work, struct cfg80211_registered_device,
404 propagate_cac_done_wk);
405
406 rtnl_lock();
407
408 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
409 NL80211_DFS_AVAILABLE,
410 NL80211_RADAR_CAC_FINISHED);
411
412 rtnl_unlock();
413 }
414
cfg80211_wiphy_work(struct work_struct * work)415 static void cfg80211_wiphy_work(struct work_struct *work)
416 {
417 struct cfg80211_registered_device *rdev;
418 struct wiphy_work *wk;
419
420 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work);
421
422 trace_wiphy_work_worker_start(&rdev->wiphy);
423
424 guard(wiphy)(&rdev->wiphy);
425 if (rdev->suspended)
426 return;
427
428 spin_lock_irq(&rdev->wiphy_work_lock);
429 wk = list_first_entry_or_null(&rdev->wiphy_work_list,
430 struct wiphy_work, entry);
431 if (wk) {
432 list_del_init(&wk->entry);
433 if (!list_empty(&rdev->wiphy_work_list))
434 queue_work(system_dfl_wq, work);
435 spin_unlock_irq(&rdev->wiphy_work_lock);
436
437 trace_wiphy_work_run(&rdev->wiphy, wk);
438 wk->func(&rdev->wiphy, wk);
439 } else {
440 spin_unlock_irq(&rdev->wiphy_work_lock);
441 }
442 }
443
444 /* exported functions */
445
wiphy_new_nm(const struct cfg80211_ops * ops,int sizeof_priv,const char * requested_name)446 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
447 const char *requested_name)
448 {
449 static atomic_t wiphy_counter = ATOMIC_INIT(0);
450
451 struct cfg80211_registered_device *rdev;
452 int alloc_size;
453
454 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
455 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
456 WARN_ON(ops->connect && !ops->disconnect);
457 WARN_ON(ops->join_ibss && !ops->leave_ibss);
458 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
459 WARN_ON(ops->add_station && !ops->del_station);
460 WARN_ON(ops->add_mpath && !ops->del_mpath);
461 WARN_ON(ops->join_mesh && !ops->leave_mesh);
462 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
463 WARN_ON(ops->start_ap && !ops->stop_ap);
464 WARN_ON(ops->join_ocb && !ops->leave_ocb);
465 WARN_ON(ops->suspend && !ops->resume);
466 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
467 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
468 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
469 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
470
471 alloc_size = sizeof(*rdev) + sizeof_priv;
472
473 rdev = kzalloc(alloc_size, GFP_KERNEL);
474 if (!rdev)
475 return NULL;
476
477 rdev->ops = ops;
478
479 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
480
481 if (unlikely(rdev->wiphy_idx < 0)) {
482 /* ugh, wrapped! */
483 atomic_dec(&wiphy_counter);
484 kfree(rdev);
485 return NULL;
486 }
487
488 /* atomic_inc_return makes it start at 1, make it start at 0 */
489 rdev->wiphy_idx--;
490
491 /* give it a proper name */
492 if (requested_name && requested_name[0]) {
493 int rv;
494
495 rtnl_lock();
496 rv = cfg80211_dev_check_name(rdev, requested_name);
497
498 if (rv < 0) {
499 rtnl_unlock();
500 goto use_default_name;
501 }
502
503 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
504 rtnl_unlock();
505 if (rv)
506 goto use_default_name;
507 } else {
508 int rv;
509
510 use_default_name:
511 /* NOTE: This is *probably* safe w/out holding rtnl because of
512 * the restrictions on phy names. Probably this call could
513 * fail if some other part of the kernel (re)named a device
514 * phyX. But, might should add some locking and check return
515 * value, and use a different name if this one exists?
516 */
517 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
518 if (rv < 0) {
519 kfree(rdev);
520 return NULL;
521 }
522 }
523
524 mutex_init(&rdev->wiphy.mtx);
525 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
526 INIT_LIST_HEAD(&rdev->beacon_registrations);
527 spin_lock_init(&rdev->beacon_registrations_lock);
528 spin_lock_init(&rdev->bss_lock);
529 INIT_LIST_HEAD(&rdev->bss_list);
530 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
531 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done);
532 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
533 cfg80211_dfs_channels_update_work);
534 #ifdef CONFIG_CFG80211_WEXT
535 rdev->wiphy.wext = &cfg80211_wext_handler;
536 #endif
537
538 device_initialize(&rdev->wiphy.dev);
539 rdev->wiphy.dev.class = &ieee80211_class;
540 rdev->wiphy.dev.platform_data = rdev;
541 device_enable_async_suspend(&rdev->wiphy.dev);
542
543 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
544 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
545 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
546 INIT_WORK(&rdev->propagate_radar_detect_wk,
547 cfg80211_propagate_radar_detect_wk);
548 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
549 INIT_WORK(&rdev->mgmt_registrations_update_wk,
550 cfg80211_mgmt_registrations_update_wk);
551 spin_lock_init(&rdev->mgmt_registrations_lock);
552 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work);
553 INIT_LIST_HEAD(&rdev->wiphy_work_list);
554 spin_lock_init(&rdev->wiphy_work_lock);
555
556 #ifdef CONFIG_CFG80211_DEFAULT_PS
557 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
558 #endif
559
560 wiphy_net_set(&rdev->wiphy, &init_net);
561
562 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
563 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
564 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
565 &rdev->rfkill_ops, rdev);
566
567 if (!rdev->wiphy.rfkill) {
568 wiphy_free(&rdev->wiphy);
569 return NULL;
570 }
571
572 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
573 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
574 INIT_WORK(&rdev->event_work, cfg80211_event_work);
575 INIT_WORK(&rdev->background_cac_abort_wk,
576 cfg80211_background_cac_abort_wk);
577 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
578 cfg80211_background_cac_done_wk);
579
580 init_waitqueue_head(&rdev->dev_wait);
581
582 /*
583 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
584 * Fragmentation and RTS threshold are disabled by default with the
585 * special -1 value.
586 */
587 rdev->wiphy.retry_short = 7;
588 rdev->wiphy.retry_long = 4;
589 rdev->wiphy.frag_threshold = (u32) -1;
590 rdev->wiphy.rts_threshold = (u32) -1;
591 rdev->wiphy.coverage_class = 0;
592
593 rdev->wiphy.max_num_csa_counters = 1;
594
595 rdev->wiphy.max_sched_scan_plans = 1;
596 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
597
598 return &rdev->wiphy;
599 }
600 EXPORT_SYMBOL(wiphy_new_nm);
601
602 static
wiphy_verify_iface_combinations(struct wiphy * wiphy,const struct ieee80211_iface_combination * iface_comb,int n_iface_comb,bool combined_radio)603 int wiphy_verify_iface_combinations(struct wiphy *wiphy,
604 const struct ieee80211_iface_combination *iface_comb,
605 int n_iface_comb,
606 bool combined_radio)
607 {
608 const struct ieee80211_iface_combination *c;
609 int i, j;
610
611 for (i = 0; i < n_iface_comb; i++) {
612 u32 cnt = 0;
613 u16 all_iftypes = 0;
614
615 c = &iface_comb[i];
616
617 /*
618 * Combinations with just one interface aren't real,
619 * however we make an exception for DFS.
620 */
621 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
622 return -EINVAL;
623
624 /* Need at least one channel */
625 if (WARN_ON(!c->num_different_channels))
626 return -EINVAL;
627
628 /* DFS only works on one channel. Avoid this check
629 * for multi-radio global combination, since it hold
630 * the capabilities of all radio combinations.
631 */
632 if (!combined_radio &&
633 WARN_ON(c->radar_detect_widths &&
634 c->num_different_channels > 1))
635 return -EINVAL;
636
637 if (WARN_ON(!c->n_limits))
638 return -EINVAL;
639
640 for (j = 0; j < c->n_limits; j++) {
641 u16 types = c->limits[j].types;
642
643 /* interface types shouldn't overlap */
644 if (WARN_ON(types & all_iftypes))
645 return -EINVAL;
646 all_iftypes |= types;
647
648 if (WARN_ON(!c->limits[j].max))
649 return -EINVAL;
650
651 /* Shouldn't list software iftypes in combinations! */
652 if (WARN_ON(wiphy->software_iftypes & types))
653 return -EINVAL;
654
655 /* Only a single P2P_DEVICE can be allowed, avoid this
656 * check for multi-radio global combination, since it
657 * hold the capabilities of all radio combinations.
658 */
659 if (!combined_radio &&
660 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
661 c->limits[j].max > 1))
662 return -EINVAL;
663
664 /* Only a single NAN can be allowed, avoid this
665 * check for multi-radio global combination, since it
666 * hold the capabilities of all radio combinations.
667 */
668 if (!combined_radio &&
669 WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
670 c->limits[j].max > 1))
671 return -EINVAL;
672
673 /*
674 * This isn't well-defined right now. If you have an
675 * IBSS interface, then its beacon interval may change
676 * by joining other networks, and nothing prevents it
677 * from doing that.
678 * So technically we probably shouldn't even allow AP
679 * and IBSS in the same interface, but it seems that
680 * some drivers support that, possibly only with fixed
681 * beacon intervals for IBSS.
682 */
683 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
684 c->beacon_int_min_gcd)) {
685 return -EINVAL;
686 }
687
688 cnt += c->limits[j].max;
689 /*
690 * Don't advertise an unsupported type
691 * in a combination.
692 */
693 if (WARN_ON((wiphy->interface_modes & types) != types))
694 return -EINVAL;
695 }
696
697 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
698 return -EINVAL;
699
700 /* You can't even choose that many! */
701 if (WARN_ON(cnt < c->max_interfaces))
702 return -EINVAL;
703 }
704
705 return 0;
706 }
707
wiphy_verify_combinations(struct wiphy * wiphy)708 static int wiphy_verify_combinations(struct wiphy *wiphy)
709 {
710 int i, ret;
711 bool combined_radio = false;
712
713 if (wiphy->n_radio) {
714 for (i = 0; i < wiphy->n_radio; i++) {
715 const struct wiphy_radio *radio = &wiphy->radio[i];
716
717 ret = wiphy_verify_iface_combinations(wiphy,
718 radio->iface_combinations,
719 radio->n_iface_combinations,
720 false);
721 if (ret)
722 return ret;
723 }
724
725 combined_radio = true;
726 }
727
728 ret = wiphy_verify_iface_combinations(wiphy,
729 wiphy->iface_combinations,
730 wiphy->n_iface_combinations,
731 combined_radio);
732
733 return ret;
734 }
735
wiphy_register(struct wiphy * wiphy)736 int wiphy_register(struct wiphy *wiphy)
737 {
738 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
739 int res;
740 enum nl80211_band band;
741 struct ieee80211_supported_band *sband;
742 bool have_band = false;
743 int i;
744 u16 ifmodes = wiphy->interface_modes;
745
746 #ifdef CONFIG_PM
747 if (WARN_ON(wiphy->wowlan &&
748 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
749 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
750 return -EINVAL;
751 if (WARN_ON(wiphy->wowlan &&
752 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
753 !wiphy->wowlan->tcp))
754 return -EINVAL;
755 #endif
756 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
757 (!rdev->ops->tdls_channel_switch ||
758 !rdev->ops->tdls_cancel_channel_switch)))
759 return -EINVAL;
760
761 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
762 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
763 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
764 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
765 return -EINVAL;
766
767 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
768 return -EINVAL;
769
770 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
771 return -EINVAL;
772
773 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
774 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
775 !wiphy->pmsr_capa->ftm.non_asap))
776 return -EINVAL;
777 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
778 !wiphy->pmsr_capa->ftm.bandwidths))
779 return -EINVAL;
780 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
781 ~(BIT(NL80211_PREAMBLE_LEGACY) |
782 BIT(NL80211_PREAMBLE_HT) |
783 BIT(NL80211_PREAMBLE_VHT) |
784 BIT(NL80211_PREAMBLE_HE) |
785 BIT(NL80211_PREAMBLE_DMG))))
786 return -EINVAL;
787 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
788 wiphy->pmsr_capa->ftm.non_trigger_based) &&
789 !(wiphy->pmsr_capa->ftm.preambles &
790 BIT(NL80211_PREAMBLE_HE))))
791 return -EINVAL;
792 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
793 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
794 BIT(NL80211_CHAN_WIDTH_20) |
795 BIT(NL80211_CHAN_WIDTH_40) |
796 BIT(NL80211_CHAN_WIDTH_80) |
797 BIT(NL80211_CHAN_WIDTH_80P80) |
798 BIT(NL80211_CHAN_WIDTH_160) |
799 BIT(NL80211_CHAN_WIDTH_320) |
800 BIT(NL80211_CHAN_WIDTH_5) |
801 BIT(NL80211_CHAN_WIDTH_10))))
802 return -EINVAL;
803 }
804
805 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
806 (wiphy->regulatory_flags &
807 (REGULATORY_CUSTOM_REG |
808 REGULATORY_STRICT_REG |
809 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
810 REGULATORY_COUNTRY_IE_IGNORE))))
811 return -EINVAL;
812
813 if (WARN_ON(wiphy->coalesce &&
814 (!wiphy->coalesce->n_rules ||
815 !wiphy->coalesce->n_patterns) &&
816 (!wiphy->coalesce->pattern_min_len ||
817 wiphy->coalesce->pattern_min_len >
818 wiphy->coalesce->pattern_max_len)))
819 return -EINVAL;
820
821 if (WARN_ON(wiphy->ap_sme_capa &&
822 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
823 return -EINVAL;
824
825 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
826 return -EINVAL;
827
828 if (WARN_ON(wiphy->addresses &&
829 !is_zero_ether_addr(wiphy->perm_addr) &&
830 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
831 ETH_ALEN)))
832 return -EINVAL;
833
834 if (WARN_ON(wiphy->max_acl_mac_addrs &&
835 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
836 !rdev->ops->set_mac_acl)))
837 return -EINVAL;
838
839 /* assure only valid behaviours are flagged by driver
840 * hence subtract 2 as bit 0 is invalid.
841 */
842 if (WARN_ON(wiphy->bss_select_support &&
843 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
844 return -EINVAL;
845
846 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
847 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
848 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
849 return -EINVAL;
850
851 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
852 rdev->ops->update_connect_params))
853 return -EINVAL;
854
855 if (wiphy->addresses)
856 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
857
858 /* sanity check ifmodes */
859 WARN_ON(!ifmodes);
860 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
861 if (WARN_ON(ifmodes != wiphy->interface_modes))
862 wiphy->interface_modes = ifmodes;
863
864 res = wiphy_verify_combinations(wiphy);
865 if (res)
866 return res;
867
868 /* sanity check supported bands/channels */
869 for (band = 0; band < NUM_NL80211_BANDS; band++) {
870 const struct ieee80211_sband_iftype_data *iftd;
871 u16 types = 0;
872 bool have_he = false;
873
874 sband = wiphy->bands[band];
875 if (!sband)
876 continue;
877
878 sband->band = band;
879 if (WARN_ON(!sband->n_channels))
880 return -EINVAL;
881 /*
882 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
883 * n_bitrates is 0
884 */
885 if (WARN_ON((band != NL80211_BAND_60GHZ &&
886 band != NL80211_BAND_S1GHZ) &&
887 !sband->n_bitrates))
888 return -EINVAL;
889
890 if (WARN_ON(band == NL80211_BAND_6GHZ &&
891 (sband->ht_cap.ht_supported ||
892 sband->vht_cap.vht_supported)))
893 return -EINVAL;
894
895 /*
896 * Since cfg80211_disable_40mhz_24ghz is global, we can
897 * modify the sband's ht data even if the driver uses a
898 * global structure for that.
899 */
900 if (cfg80211_disable_40mhz_24ghz &&
901 band == NL80211_BAND_2GHZ &&
902 sband->ht_cap.ht_supported) {
903 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
904 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
905 }
906
907 /*
908 * Since we use a u32 for rate bitmaps in
909 * ieee80211_get_response_rate, we cannot
910 * have more than 32 legacy rates.
911 */
912 if (WARN_ON(sband->n_bitrates > 32))
913 return -EINVAL;
914
915 for (i = 0; i < sband->n_channels; i++) {
916 sband->channels[i].orig_flags =
917 sband->channels[i].flags;
918 sband->channels[i].orig_mag = INT_MAX;
919 sband->channels[i].orig_mpwr =
920 sband->channels[i].max_power;
921 sband->channels[i].band = band;
922
923 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
924 return -EINVAL;
925 }
926
927 for_each_sband_iftype_data(sband, i, iftd) {
928 bool has_ap, has_non_ap;
929 u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
930 BIT(NL80211_IFTYPE_P2P_GO);
931
932 if (WARN_ON(!iftd->types_mask))
933 return -EINVAL;
934 if (WARN_ON(types & iftd->types_mask))
935 return -EINVAL;
936
937 /* at least one piece of information must be present */
938 if (WARN_ON(!iftd->he_cap.has_he))
939 return -EINVAL;
940
941 types |= iftd->types_mask;
942
943 if (i == 0)
944 have_he = iftd->he_cap.has_he;
945 else
946 have_he = have_he &&
947 iftd->he_cap.has_he;
948
949 has_ap = iftd->types_mask & ap_bits;
950 has_non_ap = iftd->types_mask & ~ap_bits;
951
952 /*
953 * For EHT 20 MHz STA, the capabilities format differs
954 * but to simplify, don't check 20 MHz but rather check
955 * only if AP and non-AP were mentioned at the same time,
956 * reject if so.
957 */
958 if (WARN_ON(iftd->eht_cap.has_eht &&
959 has_ap && has_non_ap))
960 return -EINVAL;
961 }
962
963 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
964 return -EINVAL;
965
966 have_band = true;
967 }
968
969 if (!have_band) {
970 WARN_ON(1);
971 return -EINVAL;
972 }
973
974 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
975 /*
976 * Validate we have a policy (can be explicitly set to
977 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
978 * we have at least one of doit/dumpit.
979 */
980 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
981 return -EINVAL;
982 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
983 !rdev->wiphy.vendor_commands[i].dumpit))
984 return -EINVAL;
985 }
986
987 #ifdef CONFIG_PM
988 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
989 (!rdev->wiphy.wowlan->pattern_min_len ||
990 rdev->wiphy.wowlan->pattern_min_len >
991 rdev->wiphy.wowlan->pattern_max_len)))
992 return -EINVAL;
993 #endif
994
995 if (!wiphy->max_num_akm_suites)
996 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
997 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
998 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
999 return -EINVAL;
1000
1001 /* Allocate radio configuration space for multi-radio wiphy */
1002 if (wiphy->n_radio > 0) {
1003 int idx;
1004
1005 wiphy->radio_cfg = kcalloc(wiphy->n_radio,
1006 sizeof(*wiphy->radio_cfg),
1007 GFP_KERNEL);
1008 if (!wiphy->radio_cfg)
1009 return -ENOMEM;
1010 /*
1011 * Initialize wiphy radio parameters to IEEE 802.11
1012 * MIB default values. RTS threshold is disabled by
1013 * default with the special -1 value.
1014 */
1015 for (idx = 0; idx < wiphy->n_radio; idx++)
1016 wiphy->radio_cfg[idx].rts_threshold = (u32)-1;
1017 }
1018
1019 /* check and set up bitrates */
1020 ieee80211_set_bitrate_flags(wiphy);
1021
1022 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
1023
1024 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW)
1025 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN;
1026 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)
1027 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW;
1028 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS)
1029 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS;
1030 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)
1031 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS;
1032
1033 rtnl_lock();
1034 wiphy_lock(&rdev->wiphy);
1035 res = device_add(&rdev->wiphy.dev);
1036 if (res) {
1037 wiphy_unlock(&rdev->wiphy);
1038 rtnl_unlock();
1039 return res;
1040 }
1041
1042 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
1043 cfg80211_rdev_list_generation++;
1044
1045 /* add to debugfs */
1046 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
1047 ieee80211_debugfs_dir);
1048 if (wiphy->n_radio > 0) {
1049 int idx;
1050 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN];
1051
1052 for (idx = 0; idx < wiphy->n_radio; idx++) {
1053 scnprintf(radio_name, sizeof(radio_name), "radio%d",
1054 idx);
1055 wiphy->radio_cfg[idx].radio_debugfsdir =
1056 debugfs_create_dir(radio_name,
1057 rdev->wiphy.debugfsdir);
1058 }
1059 }
1060
1061 cfg80211_debugfs_rdev_add(rdev);
1062 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
1063 wiphy_unlock(&rdev->wiphy);
1064
1065 /* set up regulatory info */
1066 wiphy_regulatory_register(wiphy);
1067
1068 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1069 struct regulatory_request request = {
1070 .wiphy_idx = get_wiphy_idx(wiphy),
1071 .initiator = NL80211_REGDOM_SET_BY_DRIVER,
1072 .alpha2[0] = '9',
1073 .alpha2[1] = '9',
1074 };
1075
1076 nl80211_send_reg_change_event(&request);
1077 }
1078
1079 /* Check that nobody globally advertises any capabilities they do not
1080 * advertise on all possible interface types.
1081 */
1082 if (wiphy->extended_capabilities_len &&
1083 wiphy->num_iftype_ext_capab &&
1084 wiphy->iftype_ext_capab) {
1085 u8 supported_on_all, j;
1086 const struct wiphy_iftype_ext_capab *capab;
1087
1088 capab = wiphy->iftype_ext_capab;
1089 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
1090 if (capab[0].extended_capabilities_len > j)
1091 supported_on_all =
1092 capab[0].extended_capabilities[j];
1093 else
1094 supported_on_all = 0x00;
1095 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
1096 if (j >= capab[i].extended_capabilities_len) {
1097 supported_on_all = 0x00;
1098 break;
1099 }
1100 supported_on_all &=
1101 capab[i].extended_capabilities[j];
1102 }
1103 if (WARN_ON(wiphy->extended_capabilities[j] &
1104 ~supported_on_all))
1105 break;
1106 }
1107 }
1108
1109 rdev->wiphy.registered = true;
1110 rtnl_unlock();
1111
1112 res = rfkill_register(rdev->wiphy.rfkill);
1113 if (res) {
1114 rfkill_destroy(rdev->wiphy.rfkill);
1115 rdev->wiphy.rfkill = NULL;
1116 wiphy_unregister(&rdev->wiphy);
1117 return res;
1118 }
1119
1120 return 0;
1121 }
1122 EXPORT_SYMBOL(wiphy_register);
1123
wiphy_rfkill_start_polling(struct wiphy * wiphy)1124 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1125 {
1126 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1127
1128 if (!rdev->ops->rfkill_poll)
1129 return;
1130 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1131 rfkill_resume_polling(wiphy->rfkill);
1132 }
1133 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1134
cfg80211_process_wiphy_works(struct cfg80211_registered_device * rdev,struct wiphy_work * end)1135 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
1136 struct wiphy_work *end)
1137 {
1138 unsigned int runaway_limit = 100;
1139 unsigned long flags;
1140
1141 lockdep_assert_held(&rdev->wiphy.mtx);
1142
1143 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1144 while (!list_empty(&rdev->wiphy_work_list)) {
1145 struct wiphy_work *wk;
1146
1147 wk = list_first_entry(&rdev->wiphy_work_list,
1148 struct wiphy_work, entry);
1149 list_del_init(&wk->entry);
1150 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1151
1152 trace_wiphy_work_run(&rdev->wiphy, wk);
1153 wk->func(&rdev->wiphy, wk);
1154
1155 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1156
1157 if (wk == end)
1158 break;
1159
1160 if (WARN_ON(--runaway_limit == 0))
1161 INIT_LIST_HEAD(&rdev->wiphy_work_list);
1162 }
1163 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1164 }
1165
wiphy_unregister(struct wiphy * wiphy)1166 void wiphy_unregister(struct wiphy *wiphy)
1167 {
1168 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1169
1170 wait_event(rdev->dev_wait, ({
1171 int __count;
1172 wiphy_lock(&rdev->wiphy);
1173 __count = rdev->opencount;
1174 wiphy_unlock(&rdev->wiphy);
1175 __count == 0; }));
1176
1177 if (rdev->wiphy.rfkill)
1178 rfkill_unregister(rdev->wiphy.rfkill);
1179
1180 rtnl_lock();
1181 wiphy_lock(&rdev->wiphy);
1182 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1183 rdev->wiphy.registered = false;
1184
1185 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1186
1187 /*
1188 * First remove the hardware from everywhere, this makes
1189 * it impossible to find from userspace.
1190 */
1191 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1192 list_del_rcu(&rdev->list);
1193 synchronize_rcu();
1194
1195 /*
1196 * If this device got a regulatory hint tell core its
1197 * free to listen now to a new shiny device regulatory hint
1198 */
1199 wiphy_regulatory_deregister(wiphy);
1200
1201 cfg80211_rdev_list_generation++;
1202 device_del(&rdev->wiphy.dev);
1203
1204 #ifdef CONFIG_PM
1205 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1206 rdev_set_wakeup(rdev, false);
1207 #endif
1208
1209 /* surely nothing is reachable now, clean up work */
1210 cfg80211_process_wiphy_works(rdev, NULL);
1211 wiphy_unlock(&rdev->wiphy);
1212 rtnl_unlock();
1213
1214 /* this has nothing to do now but make sure it's gone */
1215 cancel_work_sync(&rdev->wiphy_work);
1216
1217 cancel_work_sync(&rdev->conn_work);
1218 flush_work(&rdev->event_work);
1219 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1220 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
1221 flush_work(&rdev->destroy_work);
1222 flush_work(&rdev->propagate_radar_detect_wk);
1223 flush_work(&rdev->propagate_cac_done_wk);
1224 flush_work(&rdev->mgmt_registrations_update_wk);
1225 flush_work(&rdev->background_cac_abort_wk);
1226
1227 cfg80211_rdev_free_wowlan(rdev);
1228 cfg80211_free_coalesce(rdev->coalesce);
1229 rdev->coalesce = NULL;
1230 }
1231 EXPORT_SYMBOL(wiphy_unregister);
1232
cfg80211_dev_free(struct cfg80211_registered_device * rdev)1233 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1234 {
1235 struct cfg80211_internal_bss *scan, *tmp;
1236 struct cfg80211_beacon_registration *reg, *treg;
1237 unsigned long flags;
1238
1239 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1240 WARN_ON(!list_empty(&rdev->wiphy_work_list));
1241 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1242 cancel_work_sync(&rdev->wiphy_work);
1243
1244 rfkill_destroy(rdev->wiphy.rfkill);
1245 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1246 list_del(®->list);
1247 kfree(reg);
1248 }
1249 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1250 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1251 mutex_destroy(&rdev->wiphy.mtx);
1252
1253 /*
1254 * The 'regd' can only be non-NULL if we never finished
1255 * initializing the wiphy and thus never went through the
1256 * unregister path - e.g. in failure scenarios. Thus, it
1257 * cannot have been visible to anyone if non-NULL, so we
1258 * can just free it here.
1259 */
1260 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1261
1262 kfree(rdev);
1263 }
1264
wiphy_free(struct wiphy * wiphy)1265 void wiphy_free(struct wiphy *wiphy)
1266 {
1267 kfree(wiphy->radio_cfg);
1268 put_device(&wiphy->dev);
1269 }
1270 EXPORT_SYMBOL(wiphy_free);
1271
wiphy_rfkill_set_hw_state_reason(struct wiphy * wiphy,bool blocked,enum rfkill_hard_block_reasons reason)1272 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1273 enum rfkill_hard_block_reasons reason)
1274 {
1275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1276
1277 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
1278 schedule_work(&rdev->rfkill_block);
1279 }
1280 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
1281
_cfg80211_unregister_wdev(struct wireless_dev * wdev,bool unregister_netdev)1282 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1283 bool unregister_netdev)
1284 {
1285 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1286 struct cfg80211_cqm_config *cqm_config;
1287 unsigned int link_id;
1288
1289 ASSERT_RTNL();
1290 lockdep_assert_held(&rdev->wiphy.mtx);
1291
1292 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1293
1294 wdev->registered = false;
1295
1296 if (wdev->netdev) {
1297 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1298 if (unregister_netdev)
1299 unregister_netdevice(wdev->netdev);
1300 }
1301
1302 list_del_rcu(&wdev->list);
1303 synchronize_net();
1304 rdev->devlist_generation++;
1305
1306 cfg80211_mlme_purge_registrations(wdev);
1307
1308 switch (wdev->iftype) {
1309 case NL80211_IFTYPE_P2P_DEVICE:
1310 cfg80211_stop_p2p_device(rdev, wdev);
1311 break;
1312 case NL80211_IFTYPE_NAN:
1313 cfg80211_stop_nan(rdev, wdev);
1314 break;
1315 default:
1316 break;
1317 }
1318
1319 #ifdef CONFIG_CFG80211_WEXT
1320 kfree_sensitive(wdev->wext.keys);
1321 wdev->wext.keys = NULL;
1322 #endif
1323 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work);
1324 /* deleted from the list, so can't be found from nl80211 any more */
1325 cqm_config = rcu_access_pointer(wdev->cqm_config);
1326 kfree_rcu(cqm_config, rcu_head);
1327 RCU_INIT_POINTER(wdev->cqm_config, NULL);
1328
1329 /*
1330 * Ensure that all events have been processed and
1331 * freed.
1332 */
1333 cfg80211_process_wdev_events(wdev);
1334
1335 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1336 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1337 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
1338 struct cfg80211_internal_bss *curbss;
1339
1340 curbss = wdev->links[link_id].client.current_bss;
1341
1342 if (WARN_ON(curbss)) {
1343 cfg80211_unhold_bss(curbss);
1344 cfg80211_put_bss(wdev->wiphy, &curbss->pub);
1345 wdev->links[link_id].client.current_bss = NULL;
1346 }
1347 }
1348 }
1349
1350 wdev->connected = false;
1351 }
1352
cfg80211_unregister_wdev(struct wireless_dev * wdev)1353 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1354 {
1355 _cfg80211_unregister_wdev(wdev, true);
1356 }
1357 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1358
1359 static const struct device_type wiphy_type = {
1360 .name = "wlan",
1361 };
1362
cfg80211_update_iface_num(struct cfg80211_registered_device * rdev,enum nl80211_iftype iftype,int num)1363 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1364 enum nl80211_iftype iftype, int num)
1365 {
1366 lockdep_assert_held(&rdev->wiphy.mtx);
1367
1368 rdev->num_running_ifaces += num;
1369 if (iftype == NL80211_IFTYPE_MONITOR)
1370 rdev->num_running_monitor_ifaces += num;
1371 }
1372
cfg80211_leave(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)1373 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1374 struct wireless_dev *wdev)
1375 {
1376 struct net_device *dev = wdev->netdev;
1377 struct cfg80211_sched_scan_request *pos, *tmp;
1378
1379 lockdep_assert_held(&rdev->wiphy.mtx);
1380
1381 cfg80211_pmsr_wdev_down(wdev);
1382
1383 cfg80211_stop_radar_detection(wdev);
1384 cfg80211_stop_background_radar_detection(wdev);
1385
1386 switch (wdev->iftype) {
1387 case NL80211_IFTYPE_ADHOC:
1388 cfg80211_leave_ibss(rdev, dev, true);
1389 break;
1390 case NL80211_IFTYPE_P2P_CLIENT:
1391 case NL80211_IFTYPE_STATION:
1392 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1393 list) {
1394 if (dev == pos->dev)
1395 cfg80211_stop_sched_scan_req(rdev, pos, false);
1396 }
1397
1398 #ifdef CONFIG_CFG80211_WEXT
1399 kfree(wdev->wext.ie);
1400 wdev->wext.ie = NULL;
1401 wdev->wext.ie_len = 0;
1402 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1403 #endif
1404 cfg80211_disconnect(rdev, dev,
1405 WLAN_REASON_DEAUTH_LEAVING, true);
1406 break;
1407 case NL80211_IFTYPE_MESH_POINT:
1408 cfg80211_leave_mesh(rdev, dev);
1409 break;
1410 case NL80211_IFTYPE_AP:
1411 case NL80211_IFTYPE_P2P_GO:
1412 cfg80211_stop_ap(rdev, dev, -1, true);
1413 break;
1414 case NL80211_IFTYPE_OCB:
1415 cfg80211_leave_ocb(rdev, dev);
1416 break;
1417 case NL80211_IFTYPE_P2P_DEVICE:
1418 case NL80211_IFTYPE_NAN:
1419 /* cannot happen, has no netdev */
1420 break;
1421 case NL80211_IFTYPE_AP_VLAN:
1422 case NL80211_IFTYPE_MONITOR:
1423 /* nothing to do */
1424 break;
1425 case NL80211_IFTYPE_UNSPECIFIED:
1426 case NL80211_IFTYPE_WDS:
1427 case NUM_NL80211_IFTYPES:
1428 /* invalid */
1429 break;
1430 }
1431 }
1432
cfg80211_stop_iface(struct wiphy * wiphy,struct wireless_dev * wdev,gfp_t gfp)1433 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1434 gfp_t gfp)
1435 {
1436 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1437 struct cfg80211_event *ev;
1438 unsigned long flags;
1439
1440 trace_cfg80211_stop_iface(wiphy, wdev);
1441
1442 ev = kzalloc(sizeof(*ev), gfp);
1443 if (!ev)
1444 return;
1445
1446 ev->type = EVENT_STOPPED;
1447
1448 spin_lock_irqsave(&wdev->event_lock, flags);
1449 list_add_tail(&ev->list, &wdev->event_list);
1450 spin_unlock_irqrestore(&wdev->event_lock, flags);
1451 queue_work(cfg80211_wq, &rdev->event_work);
1452 }
1453 EXPORT_SYMBOL(cfg80211_stop_iface);
1454
cfg80211_init_wdev(struct wireless_dev * wdev)1455 void cfg80211_init_wdev(struct wireless_dev *wdev)
1456 {
1457 INIT_LIST_HEAD(&wdev->event_list);
1458 spin_lock_init(&wdev->event_lock);
1459 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1460 INIT_LIST_HEAD(&wdev->pmsr_list);
1461 spin_lock_init(&wdev->pmsr_lock);
1462 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1463
1464 #ifdef CONFIG_CFG80211_WEXT
1465 wdev->wext.default_key = -1;
1466 wdev->wext.default_mgmt_key = -1;
1467 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1468 #endif
1469
1470 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work);
1471
1472 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1473 wdev->ps = true;
1474 else
1475 wdev->ps = false;
1476 /* allow mac80211 to determine the timeout */
1477 wdev->ps_timeout = -1;
1478
1479 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1;
1480
1481 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1482 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1483 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1484 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1485
1486 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1487 }
1488
cfg80211_register_wdev(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)1489 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1490 struct wireless_dev *wdev)
1491 {
1492 ASSERT_RTNL();
1493 lockdep_assert_held(&rdev->wiphy.mtx);
1494
1495 /*
1496 * We get here also when the interface changes network namespaces,
1497 * as it's registered into the new one, but we don't want it to
1498 * change ID in that case. Checking if the ID is already assigned
1499 * works, because 0 isn't considered a valid ID and the memory is
1500 * 0-initialized.
1501 */
1502 if (!wdev->identifier)
1503 wdev->identifier = ++rdev->wdev_id;
1504 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1505 rdev->devlist_generation++;
1506 wdev->registered = true;
1507
1508 if (wdev->netdev &&
1509 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1510 "phy80211"))
1511 pr_err("failed to add phy80211 symlink to netdev!\n");
1512
1513 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1514 }
1515
cfg80211_register_netdevice(struct net_device * dev)1516 int cfg80211_register_netdevice(struct net_device *dev)
1517 {
1518 struct wireless_dev *wdev = dev->ieee80211_ptr;
1519 struct cfg80211_registered_device *rdev;
1520 int ret;
1521
1522 ASSERT_RTNL();
1523
1524 if (WARN_ON(!wdev))
1525 return -EINVAL;
1526
1527 rdev = wiphy_to_rdev(wdev->wiphy);
1528
1529 lockdep_assert_held(&rdev->wiphy.mtx);
1530
1531 /* we'll take care of this */
1532 wdev->registered = true;
1533 wdev->registering = true;
1534 ret = register_netdevice(dev);
1535 if (ret)
1536 goto out;
1537
1538 cfg80211_register_wdev(rdev, wdev);
1539 ret = 0;
1540 out:
1541 wdev->registering = false;
1542 if (ret)
1543 wdev->registered = false;
1544 return ret;
1545 }
1546 EXPORT_SYMBOL(cfg80211_register_netdevice);
1547
cfg80211_netdev_notifier_call(struct notifier_block * nb,unsigned long state,void * ptr)1548 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1549 unsigned long state, void *ptr)
1550 {
1551 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1552 struct wireless_dev *wdev = dev->ieee80211_ptr;
1553 struct cfg80211_registered_device *rdev;
1554 struct cfg80211_sched_scan_request *pos, *tmp;
1555
1556 if (!wdev)
1557 return NOTIFY_DONE;
1558
1559 rdev = wiphy_to_rdev(wdev->wiphy);
1560
1561 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1562
1563 switch (state) {
1564 case NETDEV_POST_INIT:
1565 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1566 wdev->netdev = dev;
1567 /* can only change netns with wiphy */
1568 dev->netns_immutable = true;
1569
1570 cfg80211_init_wdev(wdev);
1571 break;
1572 case NETDEV_REGISTER:
1573 if (!wdev->registered) {
1574 guard(wiphy)(&rdev->wiphy);
1575
1576 cfg80211_register_wdev(rdev, wdev);
1577 }
1578 break;
1579 case NETDEV_UNREGISTER:
1580 /*
1581 * It is possible to get NETDEV_UNREGISTER multiple times,
1582 * so check wdev->registered.
1583 */
1584 if (wdev->registered && !wdev->registering) {
1585 guard(wiphy)(&rdev->wiphy);
1586
1587 _cfg80211_unregister_wdev(wdev, false);
1588 }
1589 break;
1590 case NETDEV_GOING_DOWN:
1591 scoped_guard(wiphy, &rdev->wiphy) {
1592 cfg80211_leave(rdev, wdev);
1593 cfg80211_remove_links(wdev);
1594 }
1595 /* since we just did cfg80211_leave() nothing to do there */
1596 cancel_work_sync(&wdev->disconnect_wk);
1597 cancel_work_sync(&wdev->pmsr_free_wk);
1598 break;
1599 case NETDEV_DOWN:
1600 wiphy_lock(&rdev->wiphy);
1601 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1602 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
1603 if (WARN_ON(!rdev->scan_req->notified &&
1604 (!rdev->int_scan_req ||
1605 !rdev->int_scan_req->notified)))
1606 rdev->scan_req->info.aborted = true;
1607 ___cfg80211_scan_done(rdev, false);
1608 }
1609
1610 list_for_each_entry_safe(pos, tmp,
1611 &rdev->sched_scan_req_list, list) {
1612 if (WARN_ON(pos->dev == wdev->netdev))
1613 cfg80211_stop_sched_scan_req(rdev, pos, false);
1614 }
1615
1616 rdev->opencount--;
1617 wiphy_unlock(&rdev->wiphy);
1618 wake_up(&rdev->dev_wait);
1619 break;
1620 case NETDEV_UP:
1621 wiphy_lock(&rdev->wiphy);
1622 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1623 switch (wdev->iftype) {
1624 #ifdef CONFIG_CFG80211_WEXT
1625 case NL80211_IFTYPE_ADHOC:
1626 cfg80211_ibss_wext_join(rdev, wdev);
1627 break;
1628 case NL80211_IFTYPE_STATION:
1629 cfg80211_mgd_wext_connect(rdev, wdev);
1630 break;
1631 #endif
1632 #ifdef CONFIG_MAC80211_MESH
1633 case NL80211_IFTYPE_MESH_POINT:
1634 {
1635 /* backward compat code... */
1636 struct mesh_setup setup;
1637 memcpy(&setup, &default_mesh_setup,
1638 sizeof(setup));
1639 /* back compat only needed for mesh_id */
1640 setup.mesh_id = wdev->u.mesh.id;
1641 setup.mesh_id_len = wdev->u.mesh.id_up_len;
1642 if (wdev->u.mesh.id_up_len)
1643 __cfg80211_join_mesh(rdev, dev,
1644 &setup,
1645 &default_mesh_config);
1646 break;
1647 }
1648 #endif
1649 default:
1650 break;
1651 }
1652 rdev->opencount++;
1653
1654 /*
1655 * Configure power management to the driver here so that its
1656 * correctly set also after interface type changes etc.
1657 */
1658 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1659 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1660 rdev->ops->set_power_mgmt &&
1661 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1662 wdev->ps_timeout)) {
1663 /* assume this means it's off */
1664 wdev->ps = false;
1665 }
1666 wiphy_unlock(&rdev->wiphy);
1667 break;
1668 case NETDEV_PRE_UP:
1669 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1670 wdev->use_4addr, 0))
1671 return notifier_from_errno(-EOPNOTSUPP);
1672
1673 if (rfkill_blocked(rdev->wiphy.rfkill))
1674 return notifier_from_errno(-ERFKILL);
1675 break;
1676 default:
1677 return NOTIFY_DONE;
1678 }
1679
1680 wireless_nlevent_flush();
1681
1682 return NOTIFY_OK;
1683 }
1684
1685 static struct notifier_block cfg80211_netdev_notifier = {
1686 .notifier_call = cfg80211_netdev_notifier_call,
1687 };
1688
cfg80211_pernet_exit(struct net * net)1689 static void __net_exit cfg80211_pernet_exit(struct net *net)
1690 {
1691 struct cfg80211_registered_device *rdev;
1692
1693 rtnl_lock();
1694 for_each_rdev(rdev) {
1695 if (net_eq(wiphy_net(&rdev->wiphy), net))
1696 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1697 }
1698 rtnl_unlock();
1699 }
1700
1701 static struct pernet_operations cfg80211_pernet_ops = {
1702 .exit = cfg80211_pernet_exit,
1703 };
1704
wiphy_work_queue(struct wiphy * wiphy,struct wiphy_work * work)1705 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work)
1706 {
1707 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1708 unsigned long flags;
1709
1710 trace_wiphy_work_queue(wiphy, work);
1711
1712 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1713 if (list_empty(&work->entry))
1714 list_add_tail(&work->entry, &rdev->wiphy_work_list);
1715 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1716
1717 queue_work(system_dfl_wq, &rdev->wiphy_work);
1718 }
1719 EXPORT_SYMBOL_GPL(wiphy_work_queue);
1720
wiphy_work_cancel(struct wiphy * wiphy,struct wiphy_work * work)1721 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
1722 {
1723 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1724 unsigned long flags;
1725
1726 lockdep_assert_held(&wiphy->mtx);
1727
1728 trace_wiphy_work_cancel(wiphy, work);
1729
1730 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1731 if (!list_empty(&work->entry))
1732 list_del_init(&work->entry);
1733 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1734 }
1735 EXPORT_SYMBOL_GPL(wiphy_work_cancel);
1736
wiphy_work_flush(struct wiphy * wiphy,struct wiphy_work * work)1737 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
1738 {
1739 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1740 unsigned long flags;
1741 bool run;
1742
1743 trace_wiphy_work_flush(wiphy, work);
1744
1745 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1746 run = !work || !list_empty(&work->entry);
1747 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1748
1749 if (run)
1750 cfg80211_process_wiphy_works(rdev, work);
1751 }
1752 EXPORT_SYMBOL_GPL(wiphy_work_flush);
1753
wiphy_delayed_work_timer(struct timer_list * t)1754 void wiphy_delayed_work_timer(struct timer_list *t)
1755 {
1756 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer);
1757
1758 wiphy_work_queue(dwork->wiphy, &dwork->work);
1759 }
1760 EXPORT_SYMBOL(wiphy_delayed_work_timer);
1761
wiphy_delayed_work_queue(struct wiphy * wiphy,struct wiphy_delayed_work * dwork,unsigned long delay)1762 void wiphy_delayed_work_queue(struct wiphy *wiphy,
1763 struct wiphy_delayed_work *dwork,
1764 unsigned long delay)
1765 {
1766 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay);
1767
1768 if (!delay) {
1769 timer_delete(&dwork->timer);
1770 wiphy_work_queue(wiphy, &dwork->work);
1771 return;
1772 }
1773
1774 dwork->wiphy = wiphy;
1775 mod_timer(&dwork->timer, jiffies + delay);
1776 }
1777 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue);
1778
wiphy_delayed_work_cancel(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1779 void wiphy_delayed_work_cancel(struct wiphy *wiphy,
1780 struct wiphy_delayed_work *dwork)
1781 {
1782 lockdep_assert_held(&wiphy->mtx);
1783
1784 timer_delete_sync(&dwork->timer);
1785 wiphy_work_cancel(wiphy, &dwork->work);
1786 }
1787 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
1788
wiphy_delayed_work_flush(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1789 void wiphy_delayed_work_flush(struct wiphy *wiphy,
1790 struct wiphy_delayed_work *dwork)
1791 {
1792 lockdep_assert_held(&wiphy->mtx);
1793
1794 timer_delete_sync(&dwork->timer);
1795 wiphy_work_flush(wiphy, &dwork->work);
1796 }
1797 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
1798
wiphy_delayed_work_pending(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1799 bool wiphy_delayed_work_pending(struct wiphy *wiphy,
1800 struct wiphy_delayed_work *dwork)
1801 {
1802 return timer_pending(&dwork->timer);
1803 }
1804 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending);
1805
wiphy_hrtimer_work_timer(struct hrtimer * t)1806 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t)
1807 {
1808 struct wiphy_hrtimer_work *hrwork =
1809 container_of(t, struct wiphy_hrtimer_work, timer);
1810
1811 wiphy_work_queue(hrwork->wiphy, &hrwork->work);
1812
1813 return HRTIMER_NORESTART;
1814 }
1815 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer);
1816
wiphy_hrtimer_work_queue(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork,ktime_t delay)1817 void wiphy_hrtimer_work_queue(struct wiphy *wiphy,
1818 struct wiphy_hrtimer_work *hrwork,
1819 ktime_t delay)
1820 {
1821 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay);
1822
1823 if (!delay) {
1824 hrtimer_cancel(&hrwork->timer);
1825 wiphy_work_queue(wiphy, &hrwork->work);
1826 return;
1827 }
1828
1829 hrwork->wiphy = wiphy;
1830 hrtimer_start_range_ns(&hrwork->timer, delay,
1831 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL);
1832 }
1833 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue);
1834
wiphy_hrtimer_work_cancel(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1835 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy,
1836 struct wiphy_hrtimer_work *hrwork)
1837 {
1838 lockdep_assert_held(&wiphy->mtx);
1839
1840 hrtimer_cancel(&hrwork->timer);
1841 wiphy_work_cancel(wiphy, &hrwork->work);
1842 }
1843 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel);
1844
wiphy_hrtimer_work_flush(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1845 void wiphy_hrtimer_work_flush(struct wiphy *wiphy,
1846 struct wiphy_hrtimer_work *hrwork)
1847 {
1848 lockdep_assert_held(&wiphy->mtx);
1849
1850 hrtimer_cancel(&hrwork->timer);
1851 wiphy_work_flush(wiphy, &hrwork->work);
1852 }
1853 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush);
1854
wiphy_hrtimer_work_pending(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1855 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy,
1856 struct wiphy_hrtimer_work *hrwork)
1857 {
1858 return hrtimer_is_queued(&hrwork->timer);
1859 }
1860 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending);
1861
cfg80211_init(void)1862 static int __init cfg80211_init(void)
1863 {
1864 int err;
1865
1866 err = register_pernet_device(&cfg80211_pernet_ops);
1867 if (err)
1868 goto out_fail_pernet;
1869
1870 err = wiphy_sysfs_init();
1871 if (err)
1872 goto out_fail_sysfs;
1873
1874 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1875 if (err)
1876 goto out_fail_notifier;
1877
1878 err = nl80211_init();
1879 if (err)
1880 goto out_fail_nl80211;
1881
1882 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1883
1884 err = regulatory_init();
1885 if (err)
1886 goto out_fail_reg;
1887
1888 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1889 if (!cfg80211_wq) {
1890 err = -ENOMEM;
1891 goto out_fail_wq;
1892 }
1893
1894 return 0;
1895
1896 out_fail_wq:
1897 regulatory_exit();
1898 out_fail_reg:
1899 debugfs_remove(ieee80211_debugfs_dir);
1900 nl80211_exit();
1901 out_fail_nl80211:
1902 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1903 out_fail_notifier:
1904 wiphy_sysfs_exit();
1905 out_fail_sysfs:
1906 unregister_pernet_device(&cfg80211_pernet_ops);
1907 out_fail_pernet:
1908 return err;
1909 }
1910 fs_initcall(cfg80211_init);
1911
cfg80211_exit(void)1912 static void __exit cfg80211_exit(void)
1913 {
1914 debugfs_remove(ieee80211_debugfs_dir);
1915 nl80211_exit();
1916 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1917 wiphy_sysfs_exit();
1918 regulatory_exit();
1919 unregister_pernet_device(&cfg80211_pernet_ops);
1920 destroy_workqueue(cfg80211_wq);
1921 }
1922 module_exit(cfg80211_exit);
1923