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staging: erofs: integrate decompression inplace
[linux/fpc-iii.git] / net / wireless / core.c
blob53ad3dbb76fe554089d6d3bf38b398ad64bafb79
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 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 MODULE_AUTHOR("Johannes Berg");
38 MODULE_LICENSE("GPL");
39 MODULE_DESCRIPTION("wireless configuration support");
40 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
41
42 /* RCU-protected (and RTNL for writers) */
43 LIST_HEAD(cfg80211_rdev_list);
44 int cfg80211_rdev_list_generation;
45
46 /* for debugfs */
47 static struct dentry *ieee80211_debugfs_dir;
48
49 /* for the cleanup, scan and event works */
50 struct workqueue_struct *cfg80211_wq;
51
52 static bool cfg80211_disable_40mhz_24ghz;
53 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
54 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
55 "Disable 40MHz support in the 2.4GHz band");
56
57 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
58 {
59 struct cfg80211_registered_device *result = NULL, *rdev;
60
61 ASSERT_RTNL();
62
63 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
64 if (rdev->wiphy_idx == wiphy_idx) {
65 result = rdev;
66 break;
67 }
68 }
69
70 return result;
71 }
72
73 int get_wiphy_idx(struct wiphy *wiphy)
74 {
75 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
76
77 return rdev->wiphy_idx;
78 }
79
80 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
81 {
82 struct cfg80211_registered_device *rdev;
83
84 ASSERT_RTNL();
85
86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
87 if (!rdev)
88 return NULL;
89 return &rdev->wiphy;
90 }
91
92 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
93 const char *newname)
94 {
95 struct cfg80211_registered_device *rdev2;
96 int wiphy_idx, taken = -1, digits;
97
98 ASSERT_RTNL();
99
100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
101 return -EINVAL;
102
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
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
126 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
127 char *newname)
128 {
129 int result;
130
131 ASSERT_RTNL();
132
133 /* Ignore nop renames */
134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
135 return 0;
136
137 result = cfg80211_dev_check_name(rdev, newname);
138 if (result < 0)
139 return result;
140
141 result = device_rename(&rdev->wiphy.dev, newname);
142 if (result)
143 return result;
144
145 if (rdev->wiphy.debugfsdir &&
146 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
147 rdev->wiphy.debugfsdir,
148 rdev->wiphy.debugfsdir->d_parent,
149 newname))
150 pr_err("failed to rename debugfs dir to %s!\n", newname);
151
152 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
153
154 return 0;
155 }
156
157 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
158 struct net *net)
159 {
160 struct wireless_dev *wdev;
161 int err = 0;
162
163 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
164 return -EOPNOTSUPP;
165
166 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
167 if (!wdev->netdev)
168 continue;
169 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
170 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
171 if (err)
172 break;
173 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
174 }
175
176 if (err) {
177 /* failed -- clean up to old netns */
178 net = wiphy_net(&rdev->wiphy);
179
180 list_for_each_entry_continue_reverse(wdev,
181 &rdev->wiphy.wdev_list,
182 list) {
183 if (!wdev->netdev)
184 continue;
185 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
186 err = dev_change_net_namespace(wdev->netdev, net,
187 "wlan%d");
188 WARN_ON(err);
189 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
190 }
191
192 return err;
193 }
194
195 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
196 if (!wdev->netdev)
197 continue;
198 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
199 }
200 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
201
202 wiphy_net_set(&rdev->wiphy, net);
203
204 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
205 WARN_ON(err);
206
207 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
208 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
209 if (!wdev->netdev)
210 continue;
211 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
212 }
213
214 return 0;
215 }
216
217 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
218 {
219 struct cfg80211_registered_device *rdev = data;
220
221 rdev_rfkill_poll(rdev);
222 }
223
224 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
225 struct wireless_dev *wdev)
226 {
227 ASSERT_RTNL();
228
229 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
230 return;
231
232 if (!wdev_running(wdev))
233 return;
234
235 rdev_stop_p2p_device(rdev, wdev);
236 wdev->is_running = false;
237
238 rdev->opencount--;
239
240 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
241 if (WARN_ON(!rdev->scan_req->notified))
242 rdev->scan_req->info.aborted = true;
243 ___cfg80211_scan_done(rdev, false);
244 }
245 }
246
247 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
248 struct wireless_dev *wdev)
249 {
250 ASSERT_RTNL();
251
252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
253 return;
254
255 if (!wdev_running(wdev))
256 return;
257
258 rdev_stop_nan(rdev, wdev);
259 wdev->is_running = false;
260
261 rdev->opencount--;
262 }
263
264 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
265 {
266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
267 struct wireless_dev *wdev;
268
269 ASSERT_RTNL();
270
271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
272 if (wdev->netdev) {
273 dev_close(wdev->netdev);
274 continue;
275 }
276 /* otherwise, check iftype */
277 switch (wdev->iftype) {
278 case NL80211_IFTYPE_P2P_DEVICE:
279 cfg80211_stop_p2p_device(rdev, wdev);
280 break;
281 case NL80211_IFTYPE_NAN:
282 cfg80211_stop_nan(rdev, wdev);
283 break;
284 default:
285 break;
286 }
287 }
288 }
289 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
290
291 static int cfg80211_rfkill_set_block(void *data, bool blocked)
292 {
293 struct cfg80211_registered_device *rdev = data;
294
295 if (!blocked)
296 return 0;
297
298 rtnl_lock();
299 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
300 rtnl_unlock();
301
302 return 0;
303 }
304
305 static void cfg80211_rfkill_sync_work(struct work_struct *work)
306 {
307 struct cfg80211_registered_device *rdev;
308
309 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
310 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
311 }
312
313 static void cfg80211_event_work(struct work_struct *work)
314 {
315 struct cfg80211_registered_device *rdev;
316
317 rdev = container_of(work, struct cfg80211_registered_device,
318 event_work);
319
320 rtnl_lock();
321 cfg80211_process_rdev_events(rdev);
322 rtnl_unlock();
323 }
324
325 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
326 {
327 struct wireless_dev *wdev, *tmp;
328
329 ASSERT_RTNL();
330
331 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
332 if (wdev->nl_owner_dead)
333 rdev_del_virtual_intf(rdev, wdev);
334 }
335 }
336
337 static void cfg80211_destroy_iface_wk(struct work_struct *work)
338 {
339 struct cfg80211_registered_device *rdev;
340
341 rdev = container_of(work, struct cfg80211_registered_device,
342 destroy_work);
343
344 rtnl_lock();
345 cfg80211_destroy_ifaces(rdev);
346 rtnl_unlock();
347 }
348
349 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
350 {
351 struct cfg80211_registered_device *rdev;
352 struct cfg80211_sched_scan_request *req, *tmp;
353
354 rdev = container_of(work, struct cfg80211_registered_device,
355 sched_scan_stop_wk);
356
357 rtnl_lock();
358 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
359 if (req->nl_owner_dead)
360 cfg80211_stop_sched_scan_req(rdev, req, false);
361 }
362 rtnl_unlock();
363 }
364
365 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
366 {
367 struct cfg80211_registered_device *rdev;
368
369 rdev = container_of(work, struct cfg80211_registered_device,
370 propagate_radar_detect_wk);
371
372 rtnl_lock();
373
374 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
375 NL80211_DFS_UNAVAILABLE,
376 NL80211_RADAR_DETECTED);
377
378 rtnl_unlock();
379 }
380
381 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
382 {
383 struct cfg80211_registered_device *rdev;
384
385 rdev = container_of(work, struct cfg80211_registered_device,
386 propagate_cac_done_wk);
387
388 rtnl_lock();
389
390 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
391 NL80211_DFS_AVAILABLE,
392 NL80211_RADAR_CAC_FINISHED);
393
394 rtnl_unlock();
395 }
396
397 /* exported functions */
398
399 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
400 const char *requested_name)
401 {
402 static atomic_t wiphy_counter = ATOMIC_INIT(0);
403
404 struct cfg80211_registered_device *rdev;
405 int alloc_size;
406
407 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
408 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
409 WARN_ON(ops->connect && !ops->disconnect);
410 WARN_ON(ops->join_ibss && !ops->leave_ibss);
411 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
412 WARN_ON(ops->add_station && !ops->del_station);
413 WARN_ON(ops->add_mpath && !ops->del_mpath);
414 WARN_ON(ops->join_mesh && !ops->leave_mesh);
415 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
416 WARN_ON(ops->start_ap && !ops->stop_ap);
417 WARN_ON(ops->join_ocb && !ops->leave_ocb);
418 WARN_ON(ops->suspend && !ops->resume);
419 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
420 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
421 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
422 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
423
424 alloc_size = sizeof(*rdev) + sizeof_priv;
425
426 rdev = kzalloc(alloc_size, GFP_KERNEL);
427 if (!rdev)
428 return NULL;
429
430 rdev->ops = ops;
431
432 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
433
434 if (unlikely(rdev->wiphy_idx < 0)) {
435 /* ugh, wrapped! */
436 atomic_dec(&wiphy_counter);
437 kfree(rdev);
438 return NULL;
439 }
440
441 /* atomic_inc_return makes it start at 1, make it start at 0 */
442 rdev->wiphy_idx--;
443
444 /* give it a proper name */
445 if (requested_name && requested_name[0]) {
446 int rv;
447
448 rtnl_lock();
449 rv = cfg80211_dev_check_name(rdev, requested_name);
450
451 if (rv < 0) {
452 rtnl_unlock();
453 goto use_default_name;
454 }
455
456 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
457 rtnl_unlock();
458 if (rv)
459 goto use_default_name;
460 } else {
461 int rv;
462
463 use_default_name:
464 /* NOTE: This is *probably* safe w/out holding rtnl because of
465 * the restrictions on phy names. Probably this call could
466 * fail if some other part of the kernel (re)named a device
467 * phyX. But, might should add some locking and check return
468 * value, and use a different name if this one exists?
469 */
470 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
471 if (rv < 0) {
472 kfree(rdev);
473 return NULL;
474 }
475 }
476
477 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
478 INIT_LIST_HEAD(&rdev->beacon_registrations);
479 spin_lock_init(&rdev->beacon_registrations_lock);
480 spin_lock_init(&rdev->bss_lock);
481 INIT_LIST_HEAD(&rdev->bss_list);
482 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
483 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
484 INIT_LIST_HEAD(&rdev->mlme_unreg);
485 spin_lock_init(&rdev->mlme_unreg_lock);
486 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
487 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
488 cfg80211_dfs_channels_update_work);
489 #ifdef CONFIG_CFG80211_WEXT
490 rdev->wiphy.wext = &cfg80211_wext_handler;
491 #endif
492
493 device_initialize(&rdev->wiphy.dev);
494 rdev->wiphy.dev.class = &ieee80211_class;
495 rdev->wiphy.dev.platform_data = rdev;
496 device_enable_async_suspend(&rdev->wiphy.dev);
497
498 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
499 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
500 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
501 INIT_WORK(&rdev->propagate_radar_detect_wk,
502 cfg80211_propagate_radar_detect_wk);
503 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
504
505 #ifdef CONFIG_CFG80211_DEFAULT_PS
506 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
507 #endif
508
509 wiphy_net_set(&rdev->wiphy, &init_net);
510
511 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
512 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
513 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
514 &rdev->rfkill_ops, rdev);
515
516 if (!rdev->rfkill) {
517 wiphy_free(&rdev->wiphy);
518 return NULL;
519 }
520
521 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
522 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
523 INIT_WORK(&rdev->event_work, cfg80211_event_work);
524
525 init_waitqueue_head(&rdev->dev_wait);
526
527 /*
528 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
529 * Fragmentation and RTS threshold are disabled by default with the
530 * special -1 value.
531 */
532 rdev->wiphy.retry_short = 7;
533 rdev->wiphy.retry_long = 4;
534 rdev->wiphy.frag_threshold = (u32) -1;
535 rdev->wiphy.rts_threshold = (u32) -1;
536 rdev->wiphy.coverage_class = 0;
537
538 rdev->wiphy.max_num_csa_counters = 1;
539
540 rdev->wiphy.max_sched_scan_plans = 1;
541 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
542
543 return &rdev->wiphy;
544 }
545 EXPORT_SYMBOL(wiphy_new_nm);
546
547 static int wiphy_verify_combinations(struct wiphy *wiphy)
548 {
549 const struct ieee80211_iface_combination *c;
550 int i, j;
551
552 for (i = 0; i < wiphy->n_iface_combinations; i++) {
553 u32 cnt = 0;
554 u16 all_iftypes = 0;
555
556 c = &wiphy->iface_combinations[i];
557
558 /*
559 * Combinations with just one interface aren't real,
560 * however we make an exception for DFS.
561 */
562 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
563 return -EINVAL;
564
565 /* Need at least one channel */
566 if (WARN_ON(!c->num_different_channels))
567 return -EINVAL;
568
569 /*
570 * Put a sane limit on maximum number of different
571 * channels to simplify channel accounting code.
572 */
573 if (WARN_ON(c->num_different_channels >
574 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
575 return -EINVAL;
576
577 /* DFS only works on one channel. */
578 if (WARN_ON(c->radar_detect_widths &&
579 (c->num_different_channels > 1)))
580 return -EINVAL;
581
582 if (WARN_ON(!c->n_limits))
583 return -EINVAL;
584
585 for (j = 0; j < c->n_limits; j++) {
586 u16 types = c->limits[j].types;
587
588 /* interface types shouldn't overlap */
589 if (WARN_ON(types & all_iftypes))
590 return -EINVAL;
591 all_iftypes |= types;
592
593 if (WARN_ON(!c->limits[j].max))
594 return -EINVAL;
595
596 /* Shouldn't list software iftypes in combinations! */
597 if (WARN_ON(wiphy->software_iftypes & types))
598 return -EINVAL;
599
600 /* Only a single P2P_DEVICE can be allowed */
601 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
602 c->limits[j].max > 1))
603 return -EINVAL;
604
605 /* Only a single NAN can be allowed */
606 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
607 c->limits[j].max > 1))
608 return -EINVAL;
609
610 /*
611 * This isn't well-defined right now. If you have an
612 * IBSS interface, then its beacon interval may change
613 * by joining other networks, and nothing prevents it
614 * from doing that.
615 * So technically we probably shouldn't even allow AP
616 * and IBSS in the same interface, but it seems that
617 * some drivers support that, possibly only with fixed
618 * beacon intervals for IBSS.
619 */
620 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
621 c->beacon_int_min_gcd)) {
622 return -EINVAL;
623 }
624
625 cnt += c->limits[j].max;
626 /*
627 * Don't advertise an unsupported type
628 * in a combination.
629 */
630 if (WARN_ON((wiphy->interface_modes & types) != types))
631 return -EINVAL;
632 }
633
634 #ifndef CONFIG_WIRELESS_WDS
635 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
636 return -EINVAL;
637 #endif
638
639 /* You can't even choose that many! */
640 if (WARN_ON(cnt < c->max_interfaces))
641 return -EINVAL;
642 }
643
644 return 0;
645 }
646
647 int wiphy_register(struct wiphy *wiphy)
648 {
649 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
650 int res;
651 enum nl80211_band band;
652 struct ieee80211_supported_band *sband;
653 bool have_band = false;
654 int i;
655 u16 ifmodes = wiphy->interface_modes;
656
657 #ifdef CONFIG_PM
658 if (WARN_ON(wiphy->wowlan &&
659 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
660 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
661 return -EINVAL;
662 if (WARN_ON(wiphy->wowlan &&
663 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
664 !wiphy->wowlan->tcp))
665 return -EINVAL;
666 #endif
667 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
668 (!rdev->ops->tdls_channel_switch ||
669 !rdev->ops->tdls_cancel_channel_switch)))
670 return -EINVAL;
671
672 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
673 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
674 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
675 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
676 return -EINVAL;
677
678 #ifndef CONFIG_WIRELESS_WDS
679 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
680 return -EINVAL;
681 #endif
682
683 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
684 return -EINVAL;
685
686 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
687 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
688 !wiphy->pmsr_capa->ftm.non_asap))
689 return -EINVAL;
690 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
691 !wiphy->pmsr_capa->ftm.bandwidths))
692 return -EINVAL;
693 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
694 ~(BIT(NL80211_PREAMBLE_LEGACY) |
695 BIT(NL80211_PREAMBLE_HT) |
696 BIT(NL80211_PREAMBLE_VHT) |
697 BIT(NL80211_PREAMBLE_DMG))))
698 return -EINVAL;
699 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
700 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
701 BIT(NL80211_CHAN_WIDTH_20) |
702 BIT(NL80211_CHAN_WIDTH_40) |
703 BIT(NL80211_CHAN_WIDTH_80) |
704 BIT(NL80211_CHAN_WIDTH_80P80) |
705 BIT(NL80211_CHAN_WIDTH_160) |
706 BIT(NL80211_CHAN_WIDTH_5) |
707 BIT(NL80211_CHAN_WIDTH_10))))
708 return -EINVAL;
709 }
710
711 /*
712 * if a wiphy has unsupported modes for regulatory channel enforcement,
713 * opt-out of enforcement checking
714 */
715 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
716 BIT(NL80211_IFTYPE_P2P_CLIENT) |
717 BIT(NL80211_IFTYPE_AP) |
718 BIT(NL80211_IFTYPE_P2P_GO) |
719 BIT(NL80211_IFTYPE_ADHOC) |
720 BIT(NL80211_IFTYPE_P2P_DEVICE) |
721 BIT(NL80211_IFTYPE_NAN) |
722 BIT(NL80211_IFTYPE_AP_VLAN) |
723 BIT(NL80211_IFTYPE_MONITOR)))
724 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
725
726 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
727 (wiphy->regulatory_flags &
728 (REGULATORY_CUSTOM_REG |
729 REGULATORY_STRICT_REG |
730 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
731 REGULATORY_COUNTRY_IE_IGNORE))))
732 return -EINVAL;
733
734 if (WARN_ON(wiphy->coalesce &&
735 (!wiphy->coalesce->n_rules ||
736 !wiphy->coalesce->n_patterns) &&
737 (!wiphy->coalesce->pattern_min_len ||
738 wiphy->coalesce->pattern_min_len >
739 wiphy->coalesce->pattern_max_len)))
740 return -EINVAL;
741
742 if (WARN_ON(wiphy->ap_sme_capa &&
743 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
744 return -EINVAL;
745
746 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
747 return -EINVAL;
748
749 if (WARN_ON(wiphy->addresses &&
750 !is_zero_ether_addr(wiphy->perm_addr) &&
751 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
752 ETH_ALEN)))
753 return -EINVAL;
754
755 if (WARN_ON(wiphy->max_acl_mac_addrs &&
756 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
757 !rdev->ops->set_mac_acl)))
758 return -EINVAL;
759
760 /* assure only valid behaviours are flagged by driver
761 * hence subtract 2 as bit 0 is invalid.
762 */
763 if (WARN_ON(wiphy->bss_select_support &&
764 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
765 return -EINVAL;
766
767 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
768 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
769 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
770 return -EINVAL;
771
772 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
773 rdev->ops->update_connect_params))
774 return -EINVAL;
775
776 if (wiphy->addresses)
777 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
778
779 /* sanity check ifmodes */
780 WARN_ON(!ifmodes);
781 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
782 if (WARN_ON(ifmodes != wiphy->interface_modes))
783 wiphy->interface_modes = ifmodes;
784
785 res = wiphy_verify_combinations(wiphy);
786 if (res)
787 return res;
788
789 /* sanity check supported bands/channels */
790 for (band = 0; band < NUM_NL80211_BANDS; band++) {
791 u16 types = 0;
792
793 sband = wiphy->bands[band];
794 if (!sband)
795 continue;
796
797 sband->band = band;
798 if (WARN_ON(!sband->n_channels))
799 return -EINVAL;
800 /*
801 * on 60GHz band, there are no legacy rates, so
802 * n_bitrates is 0
803 */
804 if (WARN_ON(band != NL80211_BAND_60GHZ &&
805 !sband->n_bitrates))
806 return -EINVAL;
807
808 /*
809 * Since cfg80211_disable_40mhz_24ghz is global, we can
810 * modify the sband's ht data even if the driver uses a
811 * global structure for that.
812 */
813 if (cfg80211_disable_40mhz_24ghz &&
814 band == NL80211_BAND_2GHZ &&
815 sband->ht_cap.ht_supported) {
816 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
817 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
818 }
819
820 /*
821 * Since we use a u32 for rate bitmaps in
822 * ieee80211_get_response_rate, we cannot
823 * have more than 32 legacy rates.
824 */
825 if (WARN_ON(sband->n_bitrates > 32))
826 return -EINVAL;
827
828 for (i = 0; i < sband->n_channels; i++) {
829 sband->channels[i].orig_flags =
830 sband->channels[i].flags;
831 sband->channels[i].orig_mag = INT_MAX;
832 sband->channels[i].orig_mpwr =
833 sband->channels[i].max_power;
834 sband->channels[i].band = band;
835 }
836
837 for (i = 0; i < sband->n_iftype_data; i++) {
838 const struct ieee80211_sband_iftype_data *iftd;
839
840 iftd = &sband->iftype_data[i];
841
842 if (WARN_ON(!iftd->types_mask))
843 return -EINVAL;
844 if (WARN_ON(types & iftd->types_mask))
845 return -EINVAL;
846
847 /* at least one piece of information must be present */
848 if (WARN_ON(!iftd->he_cap.has_he))
849 return -EINVAL;
850
851 types |= iftd->types_mask;
852 }
853
854 have_band = true;
855 }
856
857 if (!have_band) {
858 WARN_ON(1);
859 return -EINVAL;
860 }
861
862 #ifdef CONFIG_PM
863 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
864 (!rdev->wiphy.wowlan->pattern_min_len ||
865 rdev->wiphy.wowlan->pattern_min_len >
866 rdev->wiphy.wowlan->pattern_max_len)))
867 return -EINVAL;
868 #endif
869
870 /* check and set up bitrates */
871 ieee80211_set_bitrate_flags(wiphy);
872
873 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
874
875 rtnl_lock();
876 res = device_add(&rdev->wiphy.dev);
877 if (res) {
878 rtnl_unlock();
879 return res;
880 }
881
882 /* set up regulatory info */
883 wiphy_regulatory_register(wiphy);
884
885 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
886 cfg80211_rdev_list_generation++;
887
888 /* add to debugfs */
889 rdev->wiphy.debugfsdir =
890 debugfs_create_dir(wiphy_name(&rdev->wiphy),
891 ieee80211_debugfs_dir);
892 if (IS_ERR(rdev->wiphy.debugfsdir))
893 rdev->wiphy.debugfsdir = NULL;
894
895 cfg80211_debugfs_rdev_add(rdev);
896 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
897
898 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
899 struct regulatory_request request;
900
901 request.wiphy_idx = get_wiphy_idx(wiphy);
902 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
903 request.alpha2[0] = '9';
904 request.alpha2[1] = '9';
905
906 nl80211_send_reg_change_event(&request);
907 }
908
909 /* Check that nobody globally advertises any capabilities they do not
910 * advertise on all possible interface types.
911 */
912 if (wiphy->extended_capabilities_len &&
913 wiphy->num_iftype_ext_capab &&
914 wiphy->iftype_ext_capab) {
915 u8 supported_on_all, j;
916 const struct wiphy_iftype_ext_capab *capab;
917
918 capab = wiphy->iftype_ext_capab;
919 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
920 if (capab[0].extended_capabilities_len > j)
921 supported_on_all =
922 capab[0].extended_capabilities[j];
923 else
924 supported_on_all = 0x00;
925 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
926 if (j >= capab[i].extended_capabilities_len) {
927 supported_on_all = 0x00;
928 break;
929 }
930 supported_on_all &=
931 capab[i].extended_capabilities[j];
932 }
933 if (WARN_ON(wiphy->extended_capabilities[j] &
934 ~supported_on_all))
935 break;
936 }
937 }
938
939 rdev->wiphy.registered = true;
940 rtnl_unlock();
941
942 res = rfkill_register(rdev->rfkill);
943 if (res) {
944 rfkill_destroy(rdev->rfkill);
945 rdev->rfkill = NULL;
946 wiphy_unregister(&rdev->wiphy);
947 return res;
948 }
949
950 return 0;
951 }
952 EXPORT_SYMBOL(wiphy_register);
953
954 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
955 {
956 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
957
958 if (!rdev->ops->rfkill_poll)
959 return;
960 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
961 rfkill_resume_polling(rdev->rfkill);
962 }
963 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
964
965 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
966 {
967 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
968
969 rfkill_pause_polling(rdev->rfkill);
970 }
971 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
972
973 void wiphy_unregister(struct wiphy *wiphy)
974 {
975 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
976
977 wait_event(rdev->dev_wait, ({
978 int __count;
979 rtnl_lock();
980 __count = rdev->opencount;
981 rtnl_unlock();
982 __count == 0; }));
983
984 if (rdev->rfkill)
985 rfkill_unregister(rdev->rfkill);
986
987 rtnl_lock();
988 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
989 rdev->wiphy.registered = false;
990
991 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
992
993 /*
994 * First remove the hardware from everywhere, this makes
995 * it impossible to find from userspace.
996 */
997 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
998 list_del_rcu(&rdev->list);
999 synchronize_rcu();
1000
1001 /*
1002 * If this device got a regulatory hint tell core its
1003 * free to listen now to a new shiny device regulatory hint
1004 */
1005 wiphy_regulatory_deregister(wiphy);
1006
1007 cfg80211_rdev_list_generation++;
1008 device_del(&rdev->wiphy.dev);
1009
1010 rtnl_unlock();
1011
1012 flush_work(&rdev->scan_done_wk);
1013 cancel_work_sync(&rdev->conn_work);
1014 flush_work(&rdev->event_work);
1015 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1016 flush_work(&rdev->destroy_work);
1017 flush_work(&rdev->sched_scan_stop_wk);
1018 flush_work(&rdev->mlme_unreg_wk);
1019 flush_work(&rdev->propagate_radar_detect_wk);
1020 flush_work(&rdev->propagate_cac_done_wk);
1021
1022 #ifdef CONFIG_PM
1023 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1024 rdev_set_wakeup(rdev, false);
1025 #endif
1026 cfg80211_rdev_free_wowlan(rdev);
1027 cfg80211_rdev_free_coalesce(rdev);
1028 }
1029 EXPORT_SYMBOL(wiphy_unregister);
1030
1031 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1032 {
1033 struct cfg80211_internal_bss *scan, *tmp;
1034 struct cfg80211_beacon_registration *reg, *treg;
1035 rfkill_destroy(rdev->rfkill);
1036 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1037 list_del(&reg->list);
1038 kfree(reg);
1039 }
1040 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1041 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1042 kfree(rdev);
1043 }
1044
1045 void wiphy_free(struct wiphy *wiphy)
1046 {
1047 put_device(&wiphy->dev);
1048 }
1049 EXPORT_SYMBOL(wiphy_free);
1050
1051 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
1052 {
1053 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1054
1055 if (rfkill_set_hw_state(rdev->rfkill, blocked))
1056 schedule_work(&rdev->rfkill_sync);
1057 }
1058 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
1059
1060 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1061 {
1062 kfree(wdev->cqm_config);
1063 wdev->cqm_config = NULL;
1064 }
1065
1066 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync)
1067 {
1068 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1069
1070 ASSERT_RTNL();
1071
1072 flush_work(&wdev->pmsr_free_wk);
1073
1074 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1075
1076 list_del_rcu(&wdev->list);
1077 if (sync)
1078 synchronize_rcu();
1079 rdev->devlist_generation++;
1080
1081 cfg80211_mlme_purge_registrations(wdev);
1082
1083 switch (wdev->iftype) {
1084 case NL80211_IFTYPE_P2P_DEVICE:
1085 cfg80211_stop_p2p_device(rdev, wdev);
1086 break;
1087 case NL80211_IFTYPE_NAN:
1088 cfg80211_stop_nan(rdev, wdev);
1089 break;
1090 default:
1091 break;
1092 }
1093
1094 #ifdef CONFIG_CFG80211_WEXT
1095 kzfree(wdev->wext.keys);
1096 #endif
1097 /* only initialized if we have a netdev */
1098 if (wdev->netdev)
1099 flush_work(&wdev->disconnect_wk);
1100
1101 cfg80211_cqm_config_free(wdev);
1102 }
1103
1104 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1105 {
1106 if (WARN_ON(wdev->netdev))
1107 return;
1108
1109 __cfg80211_unregister_wdev(wdev, true);
1110 }
1111 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1112
1113 static const struct device_type wiphy_type = {
1114 .name = "wlan",
1115 };
1116
1117 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1118 enum nl80211_iftype iftype, int num)
1119 {
1120 ASSERT_RTNL();
1121
1122 rdev->num_running_ifaces += num;
1123 if (iftype == NL80211_IFTYPE_MONITOR)
1124 rdev->num_running_monitor_ifaces += num;
1125 }
1126
1127 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1128 struct wireless_dev *wdev)
1129 {
1130 struct net_device *dev = wdev->netdev;
1131 struct cfg80211_sched_scan_request *pos, *tmp;
1132
1133 ASSERT_RTNL();
1134 ASSERT_WDEV_LOCK(wdev);
1135
1136 cfg80211_pmsr_wdev_down(wdev);
1137
1138 switch (wdev->iftype) {
1139 case NL80211_IFTYPE_ADHOC:
1140 __cfg80211_leave_ibss(rdev, dev, true);
1141 break;
1142 case NL80211_IFTYPE_P2P_CLIENT:
1143 case NL80211_IFTYPE_STATION:
1144 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1145 list) {
1146 if (dev == pos->dev)
1147 cfg80211_stop_sched_scan_req(rdev, pos, false);
1148 }
1149
1150 #ifdef CONFIG_CFG80211_WEXT
1151 kfree(wdev->wext.ie);
1152 wdev->wext.ie = NULL;
1153 wdev->wext.ie_len = 0;
1154 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1155 #endif
1156 cfg80211_disconnect(rdev, dev,
1157 WLAN_REASON_DEAUTH_LEAVING, true);
1158 break;
1159 case NL80211_IFTYPE_MESH_POINT:
1160 __cfg80211_leave_mesh(rdev, dev);
1161 break;
1162 case NL80211_IFTYPE_AP:
1163 case NL80211_IFTYPE_P2P_GO:
1164 __cfg80211_stop_ap(rdev, dev, true);
1165 break;
1166 case NL80211_IFTYPE_OCB:
1167 __cfg80211_leave_ocb(rdev, dev);
1168 break;
1169 case NL80211_IFTYPE_WDS:
1170 /* must be handled by mac80211/driver, has no APIs */
1171 break;
1172 case NL80211_IFTYPE_P2P_DEVICE:
1173 case NL80211_IFTYPE_NAN:
1174 /* cannot happen, has no netdev */
1175 break;
1176 case NL80211_IFTYPE_AP_VLAN:
1177 case NL80211_IFTYPE_MONITOR:
1178 /* nothing to do */
1179 break;
1180 case NL80211_IFTYPE_UNSPECIFIED:
1181 case NUM_NL80211_IFTYPES:
1182 /* invalid */
1183 break;
1184 }
1185 }
1186
1187 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1188 struct wireless_dev *wdev)
1189 {
1190 wdev_lock(wdev);
1191 __cfg80211_leave(rdev, wdev);
1192 wdev_unlock(wdev);
1193 }
1194
1195 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1196 gfp_t gfp)
1197 {
1198 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1199 struct cfg80211_event *ev;
1200 unsigned long flags;
1201
1202 trace_cfg80211_stop_iface(wiphy, wdev);
1203
1204 ev = kzalloc(sizeof(*ev), gfp);
1205 if (!ev)
1206 return;
1207
1208 ev->type = EVENT_STOPPED;
1209
1210 spin_lock_irqsave(&wdev->event_lock, flags);
1211 list_add_tail(&ev->list, &wdev->event_list);
1212 spin_unlock_irqrestore(&wdev->event_lock, flags);
1213 queue_work(cfg80211_wq, &rdev->event_work);
1214 }
1215 EXPORT_SYMBOL(cfg80211_stop_iface);
1216
1217 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
1218 struct wireless_dev *wdev)
1219 {
1220 mutex_init(&wdev->mtx);
1221 INIT_LIST_HEAD(&wdev->event_list);
1222 spin_lock_init(&wdev->event_lock);
1223 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1224 spin_lock_init(&wdev->mgmt_registrations_lock);
1225 INIT_LIST_HEAD(&wdev->pmsr_list);
1226 spin_lock_init(&wdev->pmsr_lock);
1227 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1228
1229 /*
1230 * We get here also when the interface changes network namespaces,
1231 * as it's registered into the new one, but we don't want it to
1232 * change ID in that case. Checking if the ID is already assigned
1233 * works, because 0 isn't considered a valid ID and the memory is
1234 * 0-initialized.
1235 */
1236 if (!wdev->identifier)
1237 wdev->identifier = ++rdev->wdev_id;
1238 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1239 rdev->devlist_generation++;
1240
1241 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1242 }
1243
1244 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1245 unsigned long state, void *ptr)
1246 {
1247 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1248 struct wireless_dev *wdev = dev->ieee80211_ptr;
1249 struct cfg80211_registered_device *rdev;
1250 struct cfg80211_sched_scan_request *pos, *tmp;
1251
1252 if (!wdev)
1253 return NOTIFY_DONE;
1254
1255 rdev = wiphy_to_rdev(wdev->wiphy);
1256
1257 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1258
1259 switch (state) {
1260 case NETDEV_POST_INIT:
1261 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1262 break;
1263 case NETDEV_REGISTER:
1264 /*
1265 * NB: cannot take rdev->mtx here because this may be
1266 * called within code protected by it when interfaces
1267 * are added with nl80211.
1268 */
1269 /* can only change netns with wiphy */
1270 dev->features |= NETIF_F_NETNS_LOCAL;
1271
1272 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1273 "phy80211")) {
1274 pr_err("failed to add phy80211 symlink to netdev!\n");
1275 }
1276 wdev->netdev = dev;
1277 #ifdef CONFIG_CFG80211_WEXT
1278 wdev->wext.default_key = -1;
1279 wdev->wext.default_mgmt_key = -1;
1280 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1281 #endif
1282
1283 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1284 wdev->ps = true;
1285 else
1286 wdev->ps = false;
1287 /* allow mac80211 to determine the timeout */
1288 wdev->ps_timeout = -1;
1289
1290 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1291 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1292 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1293 dev->priv_flags |= IFF_DONT_BRIDGE;
1294
1295 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1296
1297 cfg80211_init_wdev(rdev, wdev);
1298 break;
1299 case NETDEV_GOING_DOWN:
1300 cfg80211_leave(rdev, wdev);
1301 break;
1302 case NETDEV_DOWN:
1303 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1304 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1305 if (WARN_ON(!rdev->scan_req->notified))
1306 rdev->scan_req->info.aborted = true;
1307 ___cfg80211_scan_done(rdev, false);
1308 }
1309
1310 list_for_each_entry_safe(pos, tmp,
1311 &rdev->sched_scan_req_list, list) {
1312 if (WARN_ON(pos->dev == wdev->netdev))
1313 cfg80211_stop_sched_scan_req(rdev, pos, false);
1314 }
1315
1316 rdev->opencount--;
1317 wake_up(&rdev->dev_wait);
1318 break;
1319 case NETDEV_UP:
1320 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1321 wdev_lock(wdev);
1322 switch (wdev->iftype) {
1323 #ifdef CONFIG_CFG80211_WEXT
1324 case NL80211_IFTYPE_ADHOC:
1325 cfg80211_ibss_wext_join(rdev, wdev);
1326 break;
1327 case NL80211_IFTYPE_STATION:
1328 cfg80211_mgd_wext_connect(rdev, wdev);
1329 break;
1330 #endif
1331 #ifdef CONFIG_MAC80211_MESH
1332 case NL80211_IFTYPE_MESH_POINT:
1333 {
1334 /* backward compat code... */
1335 struct mesh_setup setup;
1336 memcpy(&setup, &default_mesh_setup,
1337 sizeof(setup));
1338 /* back compat only needed for mesh_id */
1339 setup.mesh_id = wdev->ssid;
1340 setup.mesh_id_len = wdev->mesh_id_up_len;
1341 if (wdev->mesh_id_up_len)
1342 __cfg80211_join_mesh(rdev, dev,
1343 &setup,
1344 &default_mesh_config);
1345 break;
1346 }
1347 #endif
1348 default:
1349 break;
1350 }
1351 wdev_unlock(wdev);
1352 rdev->opencount++;
1353
1354 /*
1355 * Configure power management to the driver here so that its
1356 * correctly set also after interface type changes etc.
1357 */
1358 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1359 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1360 rdev->ops->set_power_mgmt &&
1361 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1362 wdev->ps_timeout)) {
1363 /* assume this means it's off */
1364 wdev->ps = false;
1365 }
1366 break;
1367 case NETDEV_UNREGISTER:
1368 /*
1369 * It is possible to get NETDEV_UNREGISTER
1370 * multiple times. To detect that, check
1371 * that the interface is still on the list
1372 * of registered interfaces, and only then
1373 * remove and clean it up.
1374 */
1375 if (!list_empty(&wdev->list)) {
1376 __cfg80211_unregister_wdev(wdev, false);
1377 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1378 }
1379 /*
1380 * synchronise (so that we won't find this netdev
1381 * from other code any more) and then clear the list
1382 * head so that the above code can safely check for
1383 * !list_empty() to avoid double-cleanup.
1384 */
1385 synchronize_rcu();
1386 INIT_LIST_HEAD(&wdev->list);
1387 /*
1388 * Ensure that all events have been processed and
1389 * freed.
1390 */
1391 cfg80211_process_wdev_events(wdev);
1392
1393 if (WARN_ON(wdev->current_bss)) {
1394 cfg80211_unhold_bss(wdev->current_bss);
1395 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1396 wdev->current_bss = NULL;
1397 }
1398 break;
1399 case NETDEV_PRE_UP:
1400 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) &&
1401 !(wdev->iftype == NL80211_IFTYPE_AP_VLAN &&
1402 rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP &&
1403 wdev->use_4addr))
1404 return notifier_from_errno(-EOPNOTSUPP);
1405
1406 if (rfkill_blocked(rdev->rfkill))
1407 return notifier_from_errno(-ERFKILL);
1408 break;
1409 default:
1410 return NOTIFY_DONE;
1411 }
1412
1413 wireless_nlevent_flush();
1414
1415 return NOTIFY_OK;
1416 }
1417
1418 static struct notifier_block cfg80211_netdev_notifier = {
1419 .notifier_call = cfg80211_netdev_notifier_call,
1420 };
1421
1422 static void __net_exit cfg80211_pernet_exit(struct net *net)
1423 {
1424 struct cfg80211_registered_device *rdev;
1425
1426 rtnl_lock();
1427 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1428 if (net_eq(wiphy_net(&rdev->wiphy), net))
1429 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1430 }
1431 rtnl_unlock();
1432 }
1433
1434 static struct pernet_operations cfg80211_pernet_ops = {
1435 .exit = cfg80211_pernet_exit,
1436 };
1437
1438 static int __init cfg80211_init(void)
1439 {
1440 int err;
1441
1442 err = register_pernet_device(&cfg80211_pernet_ops);
1443 if (err)
1444 goto out_fail_pernet;
1445
1446 err = wiphy_sysfs_init();
1447 if (err)
1448 goto out_fail_sysfs;
1449
1450 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1451 if (err)
1452 goto out_fail_notifier;
1453
1454 err = nl80211_init();
1455 if (err)
1456 goto out_fail_nl80211;
1457
1458 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1459
1460 err = regulatory_init();
1461 if (err)
1462 goto out_fail_reg;
1463
1464 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1465 if (!cfg80211_wq) {
1466 err = -ENOMEM;
1467 goto out_fail_wq;
1468 }
1469
1470 return 0;
1471
1472 out_fail_wq:
1473 regulatory_exit();
1474 out_fail_reg:
1475 debugfs_remove(ieee80211_debugfs_dir);
1476 nl80211_exit();
1477 out_fail_nl80211:
1478 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1479 out_fail_notifier:
1480 wiphy_sysfs_exit();
1481 out_fail_sysfs:
1482 unregister_pernet_device(&cfg80211_pernet_ops);
1483 out_fail_pernet:
1484 return err;
1485 }
1486 fs_initcall(cfg80211_init);
1487
1488 static void __exit cfg80211_exit(void)
1489 {
1490 debugfs_remove(ieee80211_debugfs_dir);
1491 nl80211_exit();
1492 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1493 wiphy_sysfs_exit();
1494 regulatory_exit();
1495 unregister_pernet_device(&cfg80211_pernet_ops);
1496 destroy_workqueue(cfg80211_wq);
1497 }
1498 module_exit(cfg80211_exit);
Linux with added FPC-III support