?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
bnxt_en: Add ethtool set_wol method.
[linux-2.6/btrfs-unstable.git] / net / wireless / core.c
blobe55e05bc48053f5542696a4c2d53170dfd02577c
1 /*
2 * This is the linux wireless configuration interface.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright 2015 Intel Deutschland GmbH
7 */
8
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11 #include <linux/if.h>
12 #include <linux/module.h>
13 #include <linux/err.h>
14 #include <linux/list.h>
15 #include <linux/slab.h>
16 #include <linux/nl80211.h>
17 #include <linux/debugfs.h>
18 #include <linux/notifier.h>
19 #include <linux/device.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/sched.h>
23 #include <net/genetlink.h>
24 #include <net/cfg80211.h>
25 #include "nl80211.h"
26 #include "core.h"
27 #include "sysfs.h"
28 #include "debugfs.h"
29 #include "wext-compat.h"
30 #include "rdev-ops.h"
31
32 /* name for sysfs, %d is appended */
33 #define PHY_NAME "phy"
34
35 MODULE_AUTHOR("Johannes Berg");
36 MODULE_LICENSE("GPL");
37 MODULE_DESCRIPTION("wireless configuration support");
38 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39
40 /* RCU-protected (and RTNL for writers) */
41 LIST_HEAD(cfg80211_rdev_list);
42 int cfg80211_rdev_list_generation;
43
44 /* for debugfs */
45 static struct dentry *ieee80211_debugfs_dir;
46
47 /* for the cleanup, scan and event works */
48 struct workqueue_struct *cfg80211_wq;
49
50 static bool cfg80211_disable_40mhz_24ghz;
51 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
52 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
53 "Disable 40MHz support in the 2.4GHz band");
54
55 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56 {
57 struct cfg80211_registered_device *result = NULL, *rdev;
58
59 ASSERT_RTNL();
60
61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
62 if (rdev->wiphy_idx == wiphy_idx) {
63 result = rdev;
64 break;
65 }
66 }
67
68 return result;
69 }
70
71 int get_wiphy_idx(struct wiphy *wiphy)
72 {
73 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
74
75 return rdev->wiphy_idx;
76 }
77
78 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79 {
80 struct cfg80211_registered_device *rdev;
81
82 ASSERT_RTNL();
83
84 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
85 if (!rdev)
86 return NULL;
87 return &rdev->wiphy;
88 }
89
90 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
91 const char *newname)
92 {
93 struct cfg80211_registered_device *rdev2;
94 int wiphy_idx, taken = -1, digits;
95
96 ASSERT_RTNL();
97
98 /* prohibit calling the thing phy%d when %d is not its number */
99 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
100 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
101 /* count number of places needed to print wiphy_idx */
102 digits = 1;
103 while (wiphy_idx /= 10)
104 digits++;
105 /*
106 * deny the name if it is phy<idx> where <idx> is printed
107 * without leading zeroes. taken == strlen(newname) here
108 */
109 if (taken == strlen(PHY_NAME) + digits)
110 return -EINVAL;
111 }
112
113 /* Ensure another device does not already have this name. */
114 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
115 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
116 return -EINVAL;
117
118 return 0;
119 }
120
121 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
122 char *newname)
123 {
124 int result;
125
126 ASSERT_RTNL();
127
128 /* Ignore nop renames */
129 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
130 return 0;
131
132 result = cfg80211_dev_check_name(rdev, newname);
133 if (result < 0)
134 return result;
135
136 result = device_rename(&rdev->wiphy.dev, newname);
137 if (result)
138 return result;
139
140 if (rdev->wiphy.debugfsdir &&
141 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
142 rdev->wiphy.debugfsdir,
143 rdev->wiphy.debugfsdir->d_parent,
144 newname))
145 pr_err("failed to rename debugfs dir to %s!\n", newname);
146
147 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
148
149 return 0;
150 }
151
152 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
153 struct net *net)
154 {
155 struct wireless_dev *wdev;
156 int err = 0;
157
158 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
159 return -EOPNOTSUPP;
160
161 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
162 if (!wdev->netdev)
163 continue;
164 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
166 if (err)
167 break;
168 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
169 }
170
171 if (err) {
172 /* failed -- clean up to old netns */
173 net = wiphy_net(&rdev->wiphy);
174
175 list_for_each_entry_continue_reverse(wdev,
176 &rdev->wiphy.wdev_list,
177 list) {
178 if (!wdev->netdev)
179 continue;
180 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
181 err = dev_change_net_namespace(wdev->netdev, net,
182 "wlan%d");
183 WARN_ON(err);
184 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
185 }
186
187 return err;
188 }
189
190 wiphy_net_set(&rdev->wiphy, net);
191
192 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
193 WARN_ON(err);
194
195 return 0;
196 }
197
198 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
199 {
200 struct cfg80211_registered_device *rdev = data;
201
202 rdev_rfkill_poll(rdev);
203 }
204
205 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
206 struct wireless_dev *wdev)
207 {
208 ASSERT_RTNL();
209
210 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
211 return;
212
213 if (!wdev_running(wdev))
214 return;
215
216 rdev_stop_p2p_device(rdev, wdev);
217 wdev->is_running = false;
218
219 rdev->opencount--;
220
221 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
222 if (WARN_ON(!rdev->scan_req->notified))
223 rdev->scan_req->info.aborted = true;
224 ___cfg80211_scan_done(rdev, false);
225 }
226 }
227
228 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
229 struct wireless_dev *wdev)
230 {
231 ASSERT_RTNL();
232
233 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
234 return;
235
236 if (!wdev_running(wdev))
237 return;
238
239 rdev_stop_nan(rdev, wdev);
240 wdev->is_running = false;
241
242 rdev->opencount--;
243 }
244
245 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
246 {
247 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
248 struct wireless_dev *wdev;
249
250 ASSERT_RTNL();
251
252 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
253 if (wdev->netdev) {
254 dev_close(wdev->netdev);
255 continue;
256 }
257 /* otherwise, check iftype */
258 switch (wdev->iftype) {
259 case NL80211_IFTYPE_P2P_DEVICE:
260 cfg80211_stop_p2p_device(rdev, wdev);
261 break;
262 case NL80211_IFTYPE_NAN:
263 cfg80211_stop_nan(rdev, wdev);
264 break;
265 default:
266 break;
267 }
268 }
269 }
270 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
271
272 static int cfg80211_rfkill_set_block(void *data, bool blocked)
273 {
274 struct cfg80211_registered_device *rdev = data;
275
276 if (!blocked)
277 return 0;
278
279 rtnl_lock();
280 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
281 rtnl_unlock();
282
283 return 0;
284 }
285
286 static void cfg80211_rfkill_sync_work(struct work_struct *work)
287 {
288 struct cfg80211_registered_device *rdev;
289
290 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
291 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
292 }
293
294 static void cfg80211_event_work(struct work_struct *work)
295 {
296 struct cfg80211_registered_device *rdev;
297
298 rdev = container_of(work, struct cfg80211_registered_device,
299 event_work);
300
301 rtnl_lock();
302 cfg80211_process_rdev_events(rdev);
303 rtnl_unlock();
304 }
305
306 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
307 {
308 struct cfg80211_iface_destroy *item;
309
310 ASSERT_RTNL();
311
312 spin_lock_irq(&rdev->destroy_list_lock);
313 while ((item = list_first_entry_or_null(&rdev->destroy_list,
314 struct cfg80211_iface_destroy,
315 list))) {
316 struct wireless_dev *wdev, *tmp;
317 u32 nlportid = item->nlportid;
318
319 list_del(&item->list);
320 kfree(item);
321 spin_unlock_irq(&rdev->destroy_list_lock);
322
323 list_for_each_entry_safe(wdev, tmp,
324 &rdev->wiphy.wdev_list, list) {
325 if (nlportid == wdev->owner_nlportid)
326 rdev_del_virtual_intf(rdev, wdev);
327 }
328
329 spin_lock_irq(&rdev->destroy_list_lock);
330 }
331 spin_unlock_irq(&rdev->destroy_list_lock);
332 }
333
334 static void cfg80211_destroy_iface_wk(struct work_struct *work)
335 {
336 struct cfg80211_registered_device *rdev;
337
338 rdev = container_of(work, struct cfg80211_registered_device,
339 destroy_work);
340
341 rtnl_lock();
342 cfg80211_destroy_ifaces(rdev);
343 rtnl_unlock();
344 }
345
346 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
347 {
348 struct cfg80211_registered_device *rdev;
349
350 rdev = container_of(work, struct cfg80211_registered_device,
351 sched_scan_stop_wk);
352
353 rtnl_lock();
354
355 __cfg80211_stop_sched_scan(rdev, false);
356
357 rtnl_unlock();
358 }
359
360 /* exported functions */
361
362 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
363 const char *requested_name)
364 {
365 static atomic_t wiphy_counter = ATOMIC_INIT(0);
366
367 struct cfg80211_registered_device *rdev;
368 int alloc_size;
369
370 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
371 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
372 WARN_ON(ops->connect && !ops->disconnect);
373 WARN_ON(ops->join_ibss && !ops->leave_ibss);
374 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
375 WARN_ON(ops->add_station && !ops->del_station);
376 WARN_ON(ops->add_mpath && !ops->del_mpath);
377 WARN_ON(ops->join_mesh && !ops->leave_mesh);
378 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
379 WARN_ON(ops->start_ap && !ops->stop_ap);
380 WARN_ON(ops->join_ocb && !ops->leave_ocb);
381 WARN_ON(ops->suspend && !ops->resume);
382 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
383 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
384 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
385 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
386
387 alloc_size = sizeof(*rdev) + sizeof_priv;
388
389 rdev = kzalloc(alloc_size, GFP_KERNEL);
390 if (!rdev)
391 return NULL;
392
393 rdev->ops = ops;
394
395 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
396
397 if (unlikely(rdev->wiphy_idx < 0)) {
398 /* ugh, wrapped! */
399 atomic_dec(&wiphy_counter);
400 kfree(rdev);
401 return NULL;
402 }
403
404 /* atomic_inc_return makes it start at 1, make it start at 0 */
405 rdev->wiphy_idx--;
406
407 /* give it a proper name */
408 if (requested_name && requested_name[0]) {
409 int rv;
410
411 rtnl_lock();
412 rv = cfg80211_dev_check_name(rdev, requested_name);
413
414 if (rv < 0) {
415 rtnl_unlock();
416 goto use_default_name;
417 }
418
419 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
420 rtnl_unlock();
421 if (rv)
422 goto use_default_name;
423 } else {
424 use_default_name:
425 /* NOTE: This is *probably* safe w/out holding rtnl because of
426 * the restrictions on phy names. Probably this call could
427 * fail if some other part of the kernel (re)named a device
428 * phyX. But, might should add some locking and check return
429 * value, and use a different name if this one exists?
430 */
431 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
432 }
433
434 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
435 INIT_LIST_HEAD(&rdev->beacon_registrations);
436 spin_lock_init(&rdev->beacon_registrations_lock);
437 spin_lock_init(&rdev->bss_lock);
438 INIT_LIST_HEAD(&rdev->bss_list);
439 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
440 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
441 INIT_LIST_HEAD(&rdev->mlme_unreg);
442 spin_lock_init(&rdev->mlme_unreg_lock);
443 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
444 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
445 cfg80211_dfs_channels_update_work);
446 #ifdef CONFIG_CFG80211_WEXT
447 rdev->wiphy.wext = &cfg80211_wext_handler;
448 #endif
449
450 device_initialize(&rdev->wiphy.dev);
451 rdev->wiphy.dev.class = &ieee80211_class;
452 rdev->wiphy.dev.platform_data = rdev;
453 device_enable_async_suspend(&rdev->wiphy.dev);
454
455 INIT_LIST_HEAD(&rdev->destroy_list);
456 spin_lock_init(&rdev->destroy_list_lock);
457 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
458 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
459
460 #ifdef CONFIG_CFG80211_DEFAULT_PS
461 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
462 #endif
463
464 wiphy_net_set(&rdev->wiphy, &init_net);
465
466 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
467 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
468 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
469 &rdev->rfkill_ops, rdev);
470
471 if (!rdev->rfkill) {
472 kfree(rdev);
473 return NULL;
474 }
475
476 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
477 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
478 INIT_WORK(&rdev->event_work, cfg80211_event_work);
479
480 init_waitqueue_head(&rdev->dev_wait);
481
482 /*
483 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
484 * Fragmentation and RTS threshold are disabled by default with the
485 * special -1 value.
486 */
487 rdev->wiphy.retry_short = 7;
488 rdev->wiphy.retry_long = 4;
489 rdev->wiphy.frag_threshold = (u32) -1;
490 rdev->wiphy.rts_threshold = (u32) -1;
491 rdev->wiphy.coverage_class = 0;
492
493 rdev->wiphy.max_num_csa_counters = 1;
494
495 rdev->wiphy.max_sched_scan_plans = 1;
496 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
497
498 return &rdev->wiphy;
499 }
500 EXPORT_SYMBOL(wiphy_new_nm);
501
502 static int wiphy_verify_combinations(struct wiphy *wiphy)
503 {
504 const struct ieee80211_iface_combination *c;
505 int i, j;
506
507 for (i = 0; i < wiphy->n_iface_combinations; i++) {
508 u32 cnt = 0;
509 u16 all_iftypes = 0;
510
511 c = &wiphy->iface_combinations[i];
512
513 /*
514 * Combinations with just one interface aren't real,
515 * however we make an exception for DFS.
516 */
517 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
518 return -EINVAL;
519
520 /* Need at least one channel */
521 if (WARN_ON(!c->num_different_channels))
522 return -EINVAL;
523
524 /*
525 * Put a sane limit on maximum number of different
526 * channels to simplify channel accounting code.
527 */
528 if (WARN_ON(c->num_different_channels >
529 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
530 return -EINVAL;
531
532 /* DFS only works on one channel. */
533 if (WARN_ON(c->radar_detect_widths &&
534 (c->num_different_channels > 1)))
535 return -EINVAL;
536
537 if (WARN_ON(!c->n_limits))
538 return -EINVAL;
539
540 for (j = 0; j < c->n_limits; j++) {
541 u16 types = c->limits[j].types;
542
543 /* interface types shouldn't overlap */
544 if (WARN_ON(types & all_iftypes))
545 return -EINVAL;
546 all_iftypes |= types;
547
548 if (WARN_ON(!c->limits[j].max))
549 return -EINVAL;
550
551 /* Shouldn't list software iftypes in combinations! */
552 if (WARN_ON(wiphy->software_iftypes & types))
553 return -EINVAL;
554
555 /* Only a single P2P_DEVICE can be allowed */
556 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
557 c->limits[j].max > 1))
558 return -EINVAL;
559
560 /* Only a single NAN can be allowed */
561 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
562 c->limits[j].max > 1))
563 return -EINVAL;
564
565 /*
566 * This isn't well-defined right now. If you have an
567 * IBSS interface, then its beacon interval may change
568 * by joining other networks, and nothing prevents it
569 * from doing that.
570 * So technically we probably shouldn't even allow AP
571 * and IBSS in the same interface, but it seems that
572 * some drivers support that, possibly only with fixed
573 * beacon intervals for IBSS.
574 */
575 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
576 c->beacon_int_min_gcd)) {
577 return -EINVAL;
578 }
579
580 cnt += c->limits[j].max;
581 /*
582 * Don't advertise an unsupported type
583 * in a combination.
584 */
585 if (WARN_ON((wiphy->interface_modes & types) != types))
586 return -EINVAL;
587 }
588
589 #ifndef CONFIG_WIRELESS_WDS
590 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
591 return -EINVAL;
592 #endif
593
594 /* You can't even choose that many! */
595 if (WARN_ON(cnt < c->max_interfaces))
596 return -EINVAL;
597 }
598
599 return 0;
600 }
601
602 int wiphy_register(struct wiphy *wiphy)
603 {
604 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
605 int res;
606 enum nl80211_band band;
607 struct ieee80211_supported_band *sband;
608 bool have_band = false;
609 int i;
610 u16 ifmodes = wiphy->interface_modes;
611
612 #ifdef CONFIG_PM
613 if (WARN_ON(wiphy->wowlan &&
614 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
615 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
616 return -EINVAL;
617 if (WARN_ON(wiphy->wowlan &&
618 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
619 !wiphy->wowlan->tcp))
620 return -EINVAL;
621 #endif
622 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
623 (!rdev->ops->tdls_channel_switch ||
624 !rdev->ops->tdls_cancel_channel_switch)))
625 return -EINVAL;
626
627 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
628 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
629 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
630 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
631 return -EINVAL;
632
633 #ifndef CONFIG_WIRELESS_WDS
634 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
635 return -EINVAL;
636 #endif
637
638 /*
639 * if a wiphy has unsupported modes for regulatory channel enforcement,
640 * opt-out of enforcement checking
641 */
642 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
643 BIT(NL80211_IFTYPE_P2P_CLIENT) |
644 BIT(NL80211_IFTYPE_AP) |
645 BIT(NL80211_IFTYPE_P2P_GO) |
646 BIT(NL80211_IFTYPE_ADHOC) |
647 BIT(NL80211_IFTYPE_P2P_DEVICE) |
648 BIT(NL80211_IFTYPE_NAN) |
649 BIT(NL80211_IFTYPE_AP_VLAN) |
650 BIT(NL80211_IFTYPE_MONITOR)))
651 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
652
653 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
654 (wiphy->regulatory_flags &
655 (REGULATORY_CUSTOM_REG |
656 REGULATORY_STRICT_REG |
657 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
658 REGULATORY_COUNTRY_IE_IGNORE))))
659 return -EINVAL;
660
661 if (WARN_ON(wiphy->coalesce &&
662 (!wiphy->coalesce->n_rules ||
663 !wiphy->coalesce->n_patterns) &&
664 (!wiphy->coalesce->pattern_min_len ||
665 wiphy->coalesce->pattern_min_len >
666 wiphy->coalesce->pattern_max_len)))
667 return -EINVAL;
668
669 if (WARN_ON(wiphy->ap_sme_capa &&
670 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
671 return -EINVAL;
672
673 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
674 return -EINVAL;
675
676 if (WARN_ON(wiphy->addresses &&
677 !is_zero_ether_addr(wiphy->perm_addr) &&
678 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
679 ETH_ALEN)))
680 return -EINVAL;
681
682 if (WARN_ON(wiphy->max_acl_mac_addrs &&
683 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
684 !rdev->ops->set_mac_acl)))
685 return -EINVAL;
686
687 /* assure only valid behaviours are flagged by driver
688 * hence subtract 2 as bit 0 is invalid.
689 */
690 if (WARN_ON(wiphy->bss_select_support &&
691 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
692 return -EINVAL;
693
694 if (wiphy->addresses)
695 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
696
697 /* sanity check ifmodes */
698 WARN_ON(!ifmodes);
699 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
700 if (WARN_ON(ifmodes != wiphy->interface_modes))
701 wiphy->interface_modes = ifmodes;
702
703 res = wiphy_verify_combinations(wiphy);
704 if (res)
705 return res;
706
707 /* sanity check supported bands/channels */
708 for (band = 0; band < NUM_NL80211_BANDS; band++) {
709 sband = wiphy->bands[band];
710 if (!sband)
711 continue;
712
713 sband->band = band;
714 if (WARN_ON(!sband->n_channels))
715 return -EINVAL;
716 /*
717 * on 60GHz band, there are no legacy rates, so
718 * n_bitrates is 0
719 */
720 if (WARN_ON(band != NL80211_BAND_60GHZ &&
721 !sband->n_bitrates))
722 return -EINVAL;
723
724 /*
725 * Since cfg80211_disable_40mhz_24ghz is global, we can
726 * modify the sband's ht data even if the driver uses a
727 * global structure for that.
728 */
729 if (cfg80211_disable_40mhz_24ghz &&
730 band == NL80211_BAND_2GHZ &&
731 sband->ht_cap.ht_supported) {
732 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
733 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
734 }
735
736 /*
737 * Since we use a u32 for rate bitmaps in
738 * ieee80211_get_response_rate, we cannot
739 * have more than 32 legacy rates.
740 */
741 if (WARN_ON(sband->n_bitrates > 32))
742 return -EINVAL;
743
744 for (i = 0; i < sband->n_channels; i++) {
745 sband->channels[i].orig_flags =
746 sband->channels[i].flags;
747 sband->channels[i].orig_mag = INT_MAX;
748 sband->channels[i].orig_mpwr =
749 sband->channels[i].max_power;
750 sband->channels[i].band = band;
751 }
752
753 have_band = true;
754 }
755
756 if (!have_band) {
757 WARN_ON(1);
758 return -EINVAL;
759 }
760
761 #ifdef CONFIG_PM
762 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
763 (!rdev->wiphy.wowlan->pattern_min_len ||
764 rdev->wiphy.wowlan->pattern_min_len >
765 rdev->wiphy.wowlan->pattern_max_len)))
766 return -EINVAL;
767 #endif
768
769 /* check and set up bitrates */
770 ieee80211_set_bitrate_flags(wiphy);
771
772 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
773
774 rtnl_lock();
775 res = device_add(&rdev->wiphy.dev);
776 if (res) {
777 rtnl_unlock();
778 return res;
779 }
780
781 /* set up regulatory info */
782 wiphy_regulatory_register(wiphy);
783
784 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
785 cfg80211_rdev_list_generation++;
786
787 /* add to debugfs */
788 rdev->wiphy.debugfsdir =
789 debugfs_create_dir(wiphy_name(&rdev->wiphy),
790 ieee80211_debugfs_dir);
791 if (IS_ERR(rdev->wiphy.debugfsdir))
792 rdev->wiphy.debugfsdir = NULL;
793
794 cfg80211_debugfs_rdev_add(rdev);
795 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
796
797 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
798 struct regulatory_request request;
799
800 request.wiphy_idx = get_wiphy_idx(wiphy);
801 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
802 request.alpha2[0] = '9';
803 request.alpha2[1] = '9';
804
805 nl80211_send_reg_change_event(&request);
806 }
807
808 /* Check that nobody globally advertises any capabilities they do not
809 * advertise on all possible interface types.
810 */
811 if (wiphy->extended_capabilities_len &&
812 wiphy->num_iftype_ext_capab &&
813 wiphy->iftype_ext_capab) {
814 u8 supported_on_all, j;
815 const struct wiphy_iftype_ext_capab *capab;
816
817 capab = wiphy->iftype_ext_capab;
818 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
819 if (capab[0].extended_capabilities_len > j)
820 supported_on_all =
821 capab[0].extended_capabilities[j];
822 else
823 supported_on_all = 0x00;
824 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
825 if (j >= capab[i].extended_capabilities_len) {
826 supported_on_all = 0x00;
827 break;
828 }
829 supported_on_all &=
830 capab[i].extended_capabilities[j];
831 }
832 if (WARN_ON(wiphy->extended_capabilities[j] &
833 ~supported_on_all))
834 break;
835 }
836 }
837
838 rdev->wiphy.registered = true;
839 rtnl_unlock();
840
841 res = rfkill_register(rdev->rfkill);
842 if (res) {
843 rfkill_destroy(rdev->rfkill);
844 rdev->rfkill = NULL;
845 wiphy_unregister(&rdev->wiphy);
846 return res;
847 }
848
849 return 0;
850 }
851 EXPORT_SYMBOL(wiphy_register);
852
853 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
854 {
855 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
856
857 if (!rdev->ops->rfkill_poll)
858 return;
859 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
860 rfkill_resume_polling(rdev->rfkill);
861 }
862 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
863
864 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
865 {
866 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
867
868 rfkill_pause_polling(rdev->rfkill);
869 }
870 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
871
872 void wiphy_unregister(struct wiphy *wiphy)
873 {
874 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
875
876 wait_event(rdev->dev_wait, ({
877 int __count;
878 rtnl_lock();
879 __count = rdev->opencount;
880 rtnl_unlock();
881 __count == 0; }));
882
883 if (rdev->rfkill)
884 rfkill_unregister(rdev->rfkill);
885
886 rtnl_lock();
887 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
888 rdev->wiphy.registered = false;
889
890 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
891
892 /*
893 * First remove the hardware from everywhere, this makes
894 * it impossible to find from userspace.
895 */
896 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
897 list_del_rcu(&rdev->list);
898 synchronize_rcu();
899
900 /*
901 * If this device got a regulatory hint tell core its
902 * free to listen now to a new shiny device regulatory hint
903 */
904 wiphy_regulatory_deregister(wiphy);
905
906 cfg80211_rdev_list_generation++;
907 device_del(&rdev->wiphy.dev);
908
909 rtnl_unlock();
910
911 flush_work(&rdev->scan_done_wk);
912 cancel_work_sync(&rdev->conn_work);
913 flush_work(&rdev->event_work);
914 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
915 flush_work(&rdev->destroy_work);
916 flush_work(&rdev->sched_scan_stop_wk);
917 flush_work(&rdev->mlme_unreg_wk);
918
919 #ifdef CONFIG_PM
920 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
921 rdev_set_wakeup(rdev, false);
922 #endif
923 cfg80211_rdev_free_wowlan(rdev);
924 cfg80211_rdev_free_coalesce(rdev);
925 }
926 EXPORT_SYMBOL(wiphy_unregister);
927
928 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
929 {
930 struct cfg80211_internal_bss *scan, *tmp;
931 struct cfg80211_beacon_registration *reg, *treg;
932 rfkill_destroy(rdev->rfkill);
933 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
934 list_del(&reg->list);
935 kfree(reg);
936 }
937 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
938 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
939 kfree(rdev);
940 }
941
942 void wiphy_free(struct wiphy *wiphy)
943 {
944 put_device(&wiphy->dev);
945 }
946 EXPORT_SYMBOL(wiphy_free);
947
948 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
949 {
950 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
951
952 if (rfkill_set_hw_state(rdev->rfkill, blocked))
953 schedule_work(&rdev->rfkill_sync);
954 }
955 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
956
957 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
958 {
959 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
960
961 ASSERT_RTNL();
962
963 if (WARN_ON(wdev->netdev))
964 return;
965
966 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
967
968 list_del_rcu(&wdev->list);
969 rdev->devlist_generation++;
970
971 switch (wdev->iftype) {
972 case NL80211_IFTYPE_P2P_DEVICE:
973 cfg80211_mlme_purge_registrations(wdev);
974 cfg80211_stop_p2p_device(rdev, wdev);
975 break;
976 case NL80211_IFTYPE_NAN:
977 cfg80211_stop_nan(rdev, wdev);
978 break;
979 default:
980 WARN_ON_ONCE(1);
981 break;
982 }
983 }
984 EXPORT_SYMBOL(cfg80211_unregister_wdev);
985
986 static const struct device_type wiphy_type = {
987 .name = "wlan",
988 };
989
990 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
991 enum nl80211_iftype iftype, int num)
992 {
993 ASSERT_RTNL();
994
995 rdev->num_running_ifaces += num;
996 if (iftype == NL80211_IFTYPE_MONITOR)
997 rdev->num_running_monitor_ifaces += num;
998 }
999
1000 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1001 struct wireless_dev *wdev)
1002 {
1003 struct net_device *dev = wdev->netdev;
1004 struct cfg80211_sched_scan_request *sched_scan_req;
1005
1006 ASSERT_RTNL();
1007 ASSERT_WDEV_LOCK(wdev);
1008
1009 switch (wdev->iftype) {
1010 case NL80211_IFTYPE_ADHOC:
1011 __cfg80211_leave_ibss(rdev, dev, true);
1012 break;
1013 case NL80211_IFTYPE_P2P_CLIENT:
1014 case NL80211_IFTYPE_STATION:
1015 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1016 if (sched_scan_req && dev == sched_scan_req->dev)
1017 __cfg80211_stop_sched_scan(rdev, false);
1018
1019 #ifdef CONFIG_CFG80211_WEXT
1020 kfree(wdev->wext.ie);
1021 wdev->wext.ie = NULL;
1022 wdev->wext.ie_len = 0;
1023 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1024 #endif
1025 cfg80211_disconnect(rdev, dev,
1026 WLAN_REASON_DEAUTH_LEAVING, true);
1027 break;
1028 case NL80211_IFTYPE_MESH_POINT:
1029 __cfg80211_leave_mesh(rdev, dev);
1030 break;
1031 case NL80211_IFTYPE_AP:
1032 case NL80211_IFTYPE_P2P_GO:
1033 __cfg80211_stop_ap(rdev, dev, true);
1034 break;
1035 case NL80211_IFTYPE_OCB:
1036 __cfg80211_leave_ocb(rdev, dev);
1037 break;
1038 case NL80211_IFTYPE_WDS:
1039 /* must be handled by mac80211/driver, has no APIs */
1040 break;
1041 case NL80211_IFTYPE_P2P_DEVICE:
1042 case NL80211_IFTYPE_NAN:
1043 /* cannot happen, has no netdev */
1044 break;
1045 case NL80211_IFTYPE_AP_VLAN:
1046 case NL80211_IFTYPE_MONITOR:
1047 /* nothing to do */
1048 break;
1049 case NL80211_IFTYPE_UNSPECIFIED:
1050 case NUM_NL80211_IFTYPES:
1051 /* invalid */
1052 break;
1053 }
1054 }
1055
1056 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1057 struct wireless_dev *wdev)
1058 {
1059 wdev_lock(wdev);
1060 __cfg80211_leave(rdev, wdev);
1061 wdev_unlock(wdev);
1062 }
1063
1064 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1065 gfp_t gfp)
1066 {
1067 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1068 struct cfg80211_event *ev;
1069 unsigned long flags;
1070
1071 trace_cfg80211_stop_iface(wiphy, wdev);
1072
1073 ev = kzalloc(sizeof(*ev), gfp);
1074 if (!ev)
1075 return;
1076
1077 ev->type = EVENT_STOPPED;
1078
1079 spin_lock_irqsave(&wdev->event_lock, flags);
1080 list_add_tail(&ev->list, &wdev->event_list);
1081 spin_unlock_irqrestore(&wdev->event_lock, flags);
1082 queue_work(cfg80211_wq, &rdev->event_work);
1083 }
1084 EXPORT_SYMBOL(cfg80211_stop_iface);
1085
1086 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1087 unsigned long state, void *ptr)
1088 {
1089 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1090 struct wireless_dev *wdev = dev->ieee80211_ptr;
1091 struct cfg80211_registered_device *rdev;
1092 struct cfg80211_sched_scan_request *sched_scan_req;
1093
1094 if (!wdev)
1095 return NOTIFY_DONE;
1096
1097 rdev = wiphy_to_rdev(wdev->wiphy);
1098
1099 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1100
1101 switch (state) {
1102 case NETDEV_POST_INIT:
1103 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1104 break;
1105 case NETDEV_REGISTER:
1106 /*
1107 * NB: cannot take rdev->mtx here because this may be
1108 * called within code protected by it when interfaces
1109 * are added with nl80211.
1110 */
1111 mutex_init(&wdev->mtx);
1112 INIT_LIST_HEAD(&wdev->event_list);
1113 spin_lock_init(&wdev->event_lock);
1114 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1115 spin_lock_init(&wdev->mgmt_registrations_lock);
1116
1117 wdev->identifier = ++rdev->wdev_id;
1118 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1119 rdev->devlist_generation++;
1120 /* can only change netns with wiphy */
1121 dev->features |= NETIF_F_NETNS_LOCAL;
1122
1123 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1124 "phy80211")) {
1125 pr_err("failed to add phy80211 symlink to netdev!\n");
1126 }
1127 wdev->netdev = dev;
1128 #ifdef CONFIG_CFG80211_WEXT
1129 wdev->wext.default_key = -1;
1130 wdev->wext.default_mgmt_key = -1;
1131 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1132 #endif
1133
1134 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1135 wdev->ps = true;
1136 else
1137 wdev->ps = false;
1138 /* allow mac80211 to determine the timeout */
1139 wdev->ps_timeout = -1;
1140
1141 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1142 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1143 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1144 dev->priv_flags |= IFF_DONT_BRIDGE;
1145
1146 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1147
1148 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1149 break;
1150 case NETDEV_GOING_DOWN:
1151 cfg80211_leave(rdev, wdev);
1152 break;
1153 case NETDEV_DOWN:
1154 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1155 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1156 if (WARN_ON(!rdev->scan_req->notified))
1157 rdev->scan_req->info.aborted = true;
1158 ___cfg80211_scan_done(rdev, false);
1159 }
1160
1161 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1162 if (WARN_ON(sched_scan_req &&
1163 sched_scan_req->dev == wdev->netdev)) {
1164 __cfg80211_stop_sched_scan(rdev, false);
1165 }
1166
1167 rdev->opencount--;
1168 wake_up(&rdev->dev_wait);
1169 break;
1170 case NETDEV_UP:
1171 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1172 wdev_lock(wdev);
1173 switch (wdev->iftype) {
1174 #ifdef CONFIG_CFG80211_WEXT
1175 case NL80211_IFTYPE_ADHOC:
1176 cfg80211_ibss_wext_join(rdev, wdev);
1177 break;
1178 case NL80211_IFTYPE_STATION:
1179 cfg80211_mgd_wext_connect(rdev, wdev);
1180 break;
1181 #endif
1182 #ifdef CONFIG_MAC80211_MESH
1183 case NL80211_IFTYPE_MESH_POINT:
1184 {
1185 /* backward compat code... */
1186 struct mesh_setup setup;
1187 memcpy(&setup, &default_mesh_setup,
1188 sizeof(setup));
1189 /* back compat only needed for mesh_id */
1190 setup.mesh_id = wdev->ssid;
1191 setup.mesh_id_len = wdev->mesh_id_up_len;
1192 if (wdev->mesh_id_up_len)
1193 __cfg80211_join_mesh(rdev, dev,
1194 &setup,
1195 &default_mesh_config);
1196 break;
1197 }
1198 #endif
1199 default:
1200 break;
1201 }
1202 wdev_unlock(wdev);
1203 rdev->opencount++;
1204
1205 /*
1206 * Configure power management to the driver here so that its
1207 * correctly set also after interface type changes etc.
1208 */
1209 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1210 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1211 rdev->ops->set_power_mgmt)
1212 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1213 wdev->ps_timeout)) {
1214 /* assume this means it's off */
1215 wdev->ps = false;
1216 }
1217 break;
1218 case NETDEV_UNREGISTER:
1219 /*
1220 * It is possible to get NETDEV_UNREGISTER
1221 * multiple times. To detect that, check
1222 * that the interface is still on the list
1223 * of registered interfaces, and only then
1224 * remove and clean it up.
1225 */
1226 if (!list_empty(&wdev->list)) {
1227 nl80211_notify_iface(rdev, wdev,
1228 NL80211_CMD_DEL_INTERFACE);
1229 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1230 list_del_rcu(&wdev->list);
1231 rdev->devlist_generation++;
1232 cfg80211_mlme_purge_registrations(wdev);
1233 #ifdef CONFIG_CFG80211_WEXT
1234 kzfree(wdev->wext.keys);
1235 #endif
1236 flush_work(&wdev->disconnect_wk);
1237 }
1238 /*
1239 * synchronise (so that we won't find this netdev
1240 * from other code any more) and then clear the list
1241 * head so that the above code can safely check for
1242 * !list_empty() to avoid double-cleanup.
1243 */
1244 synchronize_rcu();
1245 INIT_LIST_HEAD(&wdev->list);
1246 /*
1247 * Ensure that all events have been processed and
1248 * freed.
1249 */
1250 cfg80211_process_wdev_events(wdev);
1251
1252 if (WARN_ON(wdev->current_bss)) {
1253 cfg80211_unhold_bss(wdev->current_bss);
1254 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1255 wdev->current_bss = NULL;
1256 }
1257 break;
1258 case NETDEV_PRE_UP:
1259 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1260 return notifier_from_errno(-EOPNOTSUPP);
1261 if (rfkill_blocked(rdev->rfkill))
1262 return notifier_from_errno(-ERFKILL);
1263 break;
1264 default:
1265 return NOTIFY_DONE;
1266 }
1267
1268 wireless_nlevent_flush();
1269
1270 return NOTIFY_OK;
1271 }
1272
1273 static struct notifier_block cfg80211_netdev_notifier = {
1274 .notifier_call = cfg80211_netdev_notifier_call,
1275 };
1276
1277 static void __net_exit cfg80211_pernet_exit(struct net *net)
1278 {
1279 struct cfg80211_registered_device *rdev;
1280
1281 rtnl_lock();
1282 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1283 if (net_eq(wiphy_net(&rdev->wiphy), net))
1284 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1285 }
1286 rtnl_unlock();
1287 }
1288
1289 static struct pernet_operations cfg80211_pernet_ops = {
1290 .exit = cfg80211_pernet_exit,
1291 };
1292
1293 static int __init cfg80211_init(void)
1294 {
1295 int err;
1296
1297 err = register_pernet_device(&cfg80211_pernet_ops);
1298 if (err)
1299 goto out_fail_pernet;
1300
1301 err = wiphy_sysfs_init();
1302 if (err)
1303 goto out_fail_sysfs;
1304
1305 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1306 if (err)
1307 goto out_fail_notifier;
1308
1309 err = nl80211_init();
1310 if (err)
1311 goto out_fail_nl80211;
1312
1313 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1314
1315 err = regulatory_init();
1316 if (err)
1317 goto out_fail_reg;
1318
1319 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1320 if (!cfg80211_wq) {
1321 err = -ENOMEM;
1322 goto out_fail_wq;
1323 }
1324
1325 return 0;
1326
1327 out_fail_wq:
1328 regulatory_exit();
1329 out_fail_reg:
1330 debugfs_remove(ieee80211_debugfs_dir);
1331 nl80211_exit();
1332 out_fail_nl80211:
1333 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1334 out_fail_notifier:
1335 wiphy_sysfs_exit();
1336 out_fail_sysfs:
1337 unregister_pernet_device(&cfg80211_pernet_ops);
1338 out_fail_pernet:
1339 return err;
1340 }
1341 subsys_initcall(cfg80211_init);
1342
1343 static void __exit cfg80211_exit(void)
1344 {
1345 debugfs_remove(ieee80211_debugfs_dir);
1346 nl80211_exit();
1347 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1348 wiphy_sysfs_exit();
1349 regulatory_exit();
1350 unregister_pernet_device(&cfg80211_pernet_ops);
1351 destroy_workqueue(cfg80211_wq);
1352 }
1353 module_exit(cfg80211_exit);
(deprecated) Btrfs devel tree