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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
33#define PHY_NAME "phy"
34
35MODULE_AUTHOR("Johannes Berg");
36MODULE_LICENSE("GPL");
37MODULE_DESCRIPTION("wireless configuration support");
38MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39
40
41LIST_HEAD(cfg80211_rdev_list);
42int cfg80211_rdev_list_generation;
43
44
45static struct dentry *ieee80211_debugfs_dir;
46
47
48struct workqueue_struct *cfg80211_wq;
49
50static bool cfg80211_disable_40mhz_24ghz;
51module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
52MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
53 "Disable 40MHz support in the 2.4GHz band");
54
55struct 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
71int 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
78struct 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
90static 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
99 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
100 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
101
102 digits = 1;
103 while (wiphy_idx /= 10)
104 digits++;
105
106
107
108
109 if (taken == strlen(PHY_NAME) + digits)
110 return -EINVAL;
111 }
112
113
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
121int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
122 char *newname)
123{
124 int result;
125
126 ASSERT_RTNL();
127
128
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
152int 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
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
198static 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
205void 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->p2p_started)
214 return;
215
216 rdev_stop_p2p_device(rdev, wdev);
217 wdev->p2p_started = 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->aborted = true;
224 ___cfg80211_scan_done(rdev, false);
225 }
226}
227
228void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
229{
230 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
231 struct wireless_dev *wdev;
232
233 ASSERT_RTNL();
234
235 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
236 if (wdev->netdev) {
237 dev_close(wdev->netdev);
238 continue;
239 }
240
241 switch (wdev->iftype) {
242 case NL80211_IFTYPE_P2P_DEVICE:
243 cfg80211_stop_p2p_device(rdev, wdev);
244 break;
245 default:
246 break;
247 }
248 }
249}
250EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
251
252static int cfg80211_rfkill_set_block(void *data, bool blocked)
253{
254 struct cfg80211_registered_device *rdev = data;
255
256 if (!blocked)
257 return 0;
258
259 rtnl_lock();
260 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
261 rtnl_unlock();
262
263 return 0;
264}
265
266static void cfg80211_rfkill_sync_work(struct work_struct *work)
267{
268 struct cfg80211_registered_device *rdev;
269
270 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
271 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
272}
273
274static void cfg80211_event_work(struct work_struct *work)
275{
276 struct cfg80211_registered_device *rdev;
277
278 rdev = container_of(work, struct cfg80211_registered_device,
279 event_work);
280
281 rtnl_lock();
282 cfg80211_process_rdev_events(rdev);
283 rtnl_unlock();
284}
285
286void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
287{
288 struct cfg80211_iface_destroy *item;
289
290 ASSERT_RTNL();
291
292 spin_lock_irq(&rdev->destroy_list_lock);
293 while ((item = list_first_entry_or_null(&rdev->destroy_list,
294 struct cfg80211_iface_destroy,
295 list))) {
296 struct wireless_dev *wdev, *tmp;
297 u32 nlportid = item->nlportid;
298
299 list_del(&item->list);
300 kfree(item);
301 spin_unlock_irq(&rdev->destroy_list_lock);
302
303 list_for_each_entry_safe(wdev, tmp,
304 &rdev->wiphy.wdev_list, list) {
305 if (nlportid == wdev->owner_nlportid)
306 rdev_del_virtual_intf(rdev, wdev);
307 }
308
309 spin_lock_irq(&rdev->destroy_list_lock);
310 }
311 spin_unlock_irq(&rdev->destroy_list_lock);
312}
313
314static void cfg80211_destroy_iface_wk(struct work_struct *work)
315{
316 struct cfg80211_registered_device *rdev;
317
318 rdev = container_of(work, struct cfg80211_registered_device,
319 destroy_work);
320
321 rtnl_lock();
322 cfg80211_destroy_ifaces(rdev);
323 rtnl_unlock();
324}
325
326static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
327{
328 struct cfg80211_registered_device *rdev;
329
330 rdev = container_of(work, struct cfg80211_registered_device,
331 sched_scan_stop_wk);
332
333 rtnl_lock();
334
335 __cfg80211_stop_sched_scan(rdev, false);
336
337 rtnl_unlock();
338}
339
340
341
342struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
343 const char *requested_name)
344{
345 static atomic_t wiphy_counter = ATOMIC_INIT(0);
346
347 struct cfg80211_registered_device *rdev;
348 int alloc_size;
349
350 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
351 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
352 WARN_ON(ops->connect && !ops->disconnect);
353 WARN_ON(ops->join_ibss && !ops->leave_ibss);
354 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
355 WARN_ON(ops->add_station && !ops->del_station);
356 WARN_ON(ops->add_mpath && !ops->del_mpath);
357 WARN_ON(ops->join_mesh && !ops->leave_mesh);
358 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
359 WARN_ON(ops->start_ap && !ops->stop_ap);
360 WARN_ON(ops->join_ocb && !ops->leave_ocb);
361 WARN_ON(ops->suspend && !ops->resume);
362 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
363 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
364 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
365 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
366
367 alloc_size = sizeof(*rdev) + sizeof_priv;
368
369 rdev = kzalloc(alloc_size, GFP_KERNEL);
370 if (!rdev)
371 return NULL;
372
373 rdev->ops = ops;
374
375 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
376
377 if (unlikely(rdev->wiphy_idx < 0)) {
378
379 atomic_dec(&wiphy_counter);
380 kfree(rdev);
381 return NULL;
382 }
383
384
385 rdev->wiphy_idx--;
386
387
388 if (requested_name && requested_name[0]) {
389 int rv;
390
391 rtnl_lock();
392 rv = cfg80211_dev_check_name(rdev, requested_name);
393
394 if (rv < 0) {
395 rtnl_unlock();
396 goto use_default_name;
397 }
398
399 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
400 rtnl_unlock();
401 if (rv)
402 goto use_default_name;
403 } else {
404use_default_name:
405
406
407
408
409
410
411 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
412 }
413
414 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
415 INIT_LIST_HEAD(&rdev->beacon_registrations);
416 spin_lock_init(&rdev->beacon_registrations_lock);
417 spin_lock_init(&rdev->bss_lock);
418 INIT_LIST_HEAD(&rdev->bss_list);
419 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
420 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
421 INIT_LIST_HEAD(&rdev->mlme_unreg);
422 spin_lock_init(&rdev->mlme_unreg_lock);
423 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
424 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
425 cfg80211_dfs_channels_update_work);
426#ifdef CONFIG_CFG80211_WEXT
427 rdev->wiphy.wext = &cfg80211_wext_handler;
428#endif
429
430 device_initialize(&rdev->wiphy.dev);
431 rdev->wiphy.dev.class = &ieee80211_class;
432 rdev->wiphy.dev.platform_data = rdev;
433 device_enable_async_suspend(&rdev->wiphy.dev);
434
435 INIT_LIST_HEAD(&rdev->destroy_list);
436 spin_lock_init(&rdev->destroy_list_lock);
437 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
438 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
439
440#ifdef CONFIG_CFG80211_DEFAULT_PS
441 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
442#endif
443
444 wiphy_net_set(&rdev->wiphy, &init_net);
445
446 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
447 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
448 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
449 &rdev->rfkill_ops, rdev);
450
451 if (!rdev->rfkill) {
452 kfree(rdev);
453 return NULL;
454 }
455
456 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
457 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
458 INIT_WORK(&rdev->event_work, cfg80211_event_work);
459
460 init_waitqueue_head(&rdev->dev_wait);
461
462
463
464
465
466
467 rdev->wiphy.retry_short = 7;
468 rdev->wiphy.retry_long = 4;
469 rdev->wiphy.frag_threshold = (u32) -1;
470 rdev->wiphy.rts_threshold = (u32) -1;
471 rdev->wiphy.coverage_class = 0;
472
473 rdev->wiphy.max_num_csa_counters = 1;
474
475 rdev->wiphy.max_sched_scan_plans = 1;
476 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
477
478 return &rdev->wiphy;
479}
480EXPORT_SYMBOL(wiphy_new_nm);
481
482static int wiphy_verify_combinations(struct wiphy *wiphy)
483{
484 const struct ieee80211_iface_combination *c;
485 int i, j;
486
487 for (i = 0; i < wiphy->n_iface_combinations; i++) {
488 u32 cnt = 0;
489 u16 all_iftypes = 0;
490
491 c = &wiphy->iface_combinations[i];
492
493
494
495
496
497 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
498 return -EINVAL;
499
500
501 if (WARN_ON(!c->num_different_channels))
502 return -EINVAL;
503
504
505
506
507
508 if (WARN_ON(c->num_different_channels >
509 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
510 return -EINVAL;
511
512
513 if (WARN_ON(c->radar_detect_widths &&
514 (c->num_different_channels > 1)))
515 return -EINVAL;
516
517 if (WARN_ON(!c->n_limits))
518 return -EINVAL;
519
520 for (j = 0; j < c->n_limits; j++) {
521 u16 types = c->limits[j].types;
522
523
524 if (WARN_ON(types & all_iftypes))
525 return -EINVAL;
526 all_iftypes |= types;
527
528 if (WARN_ON(!c->limits[j].max))
529 return -EINVAL;
530
531
532 if (WARN_ON(wiphy->software_iftypes & types))
533 return -EINVAL;
534
535
536 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
537 c->limits[j].max > 1))
538 return -EINVAL;
539
540 cnt += c->limits[j].max;
541
542
543
544
545 if (WARN_ON((wiphy->interface_modes & types) != types))
546 return -EINVAL;
547 }
548
549
550 if (WARN_ON(cnt < c->max_interfaces))
551 return -EINVAL;
552 }
553
554 return 0;
555}
556
557int wiphy_register(struct wiphy *wiphy)
558{
559 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
560 int res;
561 enum nl80211_band band;
562 struct ieee80211_supported_band *sband;
563 bool have_band = false;
564 int i;
565 u16 ifmodes = wiphy->interface_modes;
566
567#ifdef CONFIG_PM
568 if (WARN_ON(wiphy->wowlan &&
569 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
570 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
571 return -EINVAL;
572 if (WARN_ON(wiphy->wowlan &&
573 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
574 !wiphy->wowlan->tcp))
575 return -EINVAL;
576#endif
577 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
578 (!rdev->ops->tdls_channel_switch ||
579 !rdev->ops->tdls_cancel_channel_switch)))
580 return -EINVAL;
581
582
583
584
585
586 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
587 BIT(NL80211_IFTYPE_P2P_CLIENT) |
588 BIT(NL80211_IFTYPE_AP) |
589 BIT(NL80211_IFTYPE_P2P_GO) |
590 BIT(NL80211_IFTYPE_ADHOC) |
591 BIT(NL80211_IFTYPE_P2P_DEVICE) |
592 BIT(NL80211_IFTYPE_AP_VLAN) |
593 BIT(NL80211_IFTYPE_MONITOR)))
594 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
595
596 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
597 (wiphy->regulatory_flags &
598 (REGULATORY_CUSTOM_REG |
599 REGULATORY_STRICT_REG |
600 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
601 REGULATORY_COUNTRY_IE_IGNORE))))
602 return -EINVAL;
603
604 if (WARN_ON(wiphy->coalesce &&
605 (!wiphy->coalesce->n_rules ||
606 !wiphy->coalesce->n_patterns) &&
607 (!wiphy->coalesce->pattern_min_len ||
608 wiphy->coalesce->pattern_min_len >
609 wiphy->coalesce->pattern_max_len)))
610 return -EINVAL;
611
612 if (WARN_ON(wiphy->ap_sme_capa &&
613 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
614 return -EINVAL;
615
616 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
617 return -EINVAL;
618
619 if (WARN_ON(wiphy->addresses &&
620 !is_zero_ether_addr(wiphy->perm_addr) &&
621 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
622 ETH_ALEN)))
623 return -EINVAL;
624
625 if (WARN_ON(wiphy->max_acl_mac_addrs &&
626 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
627 !rdev->ops->set_mac_acl)))
628 return -EINVAL;
629
630
631
632
633 if (WARN_ON(wiphy->bss_select_support &&
634 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
635 return -EINVAL;
636
637 if (wiphy->addresses)
638 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
639
640
641 WARN_ON(!ifmodes);
642 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
643 if (WARN_ON(ifmodes != wiphy->interface_modes))
644 wiphy->interface_modes = ifmodes;
645
646 res = wiphy_verify_combinations(wiphy);
647 if (res)
648 return res;
649
650
651 for (band = 0; band < NUM_NL80211_BANDS; band++) {
652 sband = wiphy->bands[band];
653 if (!sband)
654 continue;
655
656 sband->band = band;
657 if (WARN_ON(!sband->n_channels))
658 return -EINVAL;
659
660
661
662
663 if (WARN_ON(band != NL80211_BAND_60GHZ &&
664 !sband->n_bitrates))
665 return -EINVAL;
666
667
668
669
670
671
672 if (cfg80211_disable_40mhz_24ghz &&
673 band == NL80211_BAND_2GHZ &&
674 sband->ht_cap.ht_supported) {
675 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
676 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
677 }
678
679
680
681
682
683
684 if (WARN_ON(sband->n_bitrates > 32))
685 return -EINVAL;
686
687 for (i = 0; i < sband->n_channels; i++) {
688 sband->channels[i].orig_flags =
689 sband->channels[i].flags;
690 sband->channels[i].orig_mag = INT_MAX;
691 sband->channels[i].orig_mpwr =
692 sband->channels[i].max_power;
693 sband->channels[i].band = band;
694 }
695
696 have_band = true;
697 }
698
699 if (!have_band) {
700 WARN_ON(1);
701 return -EINVAL;
702 }
703
704#ifdef CONFIG_PM
705 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
706 (!rdev->wiphy.wowlan->pattern_min_len ||
707 rdev->wiphy.wowlan->pattern_min_len >
708 rdev->wiphy.wowlan->pattern_max_len)))
709 return -EINVAL;
710#endif
711
712
713 ieee80211_set_bitrate_flags(wiphy);
714
715 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
716
717 rtnl_lock();
718 res = device_add(&rdev->wiphy.dev);
719 if (res) {
720 rtnl_unlock();
721 return res;
722 }
723
724
725 wiphy_regulatory_register(wiphy);
726
727 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
728 cfg80211_rdev_list_generation++;
729
730
731 rdev->wiphy.debugfsdir =
732 debugfs_create_dir(wiphy_name(&rdev->wiphy),
733 ieee80211_debugfs_dir);
734 if (IS_ERR(rdev->wiphy.debugfsdir))
735 rdev->wiphy.debugfsdir = NULL;
736
737 cfg80211_debugfs_rdev_add(rdev);
738 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
739
740 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
741 struct regulatory_request request;
742
743 request.wiphy_idx = get_wiphy_idx(wiphy);
744 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
745 request.alpha2[0] = '9';
746 request.alpha2[1] = '9';
747
748 nl80211_send_reg_change_event(&request);
749 }
750
751 rdev->wiphy.registered = true;
752 rtnl_unlock();
753
754 res = rfkill_register(rdev->rfkill);
755 if (res) {
756 rfkill_destroy(rdev->rfkill);
757 rdev->rfkill = NULL;
758 wiphy_unregister(&rdev->wiphy);
759 return res;
760 }
761
762 return 0;
763}
764EXPORT_SYMBOL(wiphy_register);
765
766void wiphy_rfkill_start_polling(struct wiphy *wiphy)
767{
768 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
769
770 if (!rdev->ops->rfkill_poll)
771 return;
772 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
773 rfkill_resume_polling(rdev->rfkill);
774}
775EXPORT_SYMBOL(wiphy_rfkill_start_polling);
776
777void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
778{
779 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
780
781 rfkill_pause_polling(rdev->rfkill);
782}
783EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
784
785void wiphy_unregister(struct wiphy *wiphy)
786{
787 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
788
789 wait_event(rdev->dev_wait, ({
790 int __count;
791 rtnl_lock();
792 __count = rdev->opencount;
793 rtnl_unlock();
794 __count == 0; }));
795
796 if (rdev->rfkill)
797 rfkill_unregister(rdev->rfkill);
798
799 rtnl_lock();
800 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
801 rdev->wiphy.registered = false;
802
803 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
804
805
806
807
808
809 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
810 list_del_rcu(&rdev->list);
811 synchronize_rcu();
812
813
814
815
816
817 wiphy_regulatory_deregister(wiphy);
818
819 cfg80211_rdev_list_generation++;
820 device_del(&rdev->wiphy.dev);
821
822 rtnl_unlock();
823
824 flush_work(&rdev->scan_done_wk);
825 cancel_work_sync(&rdev->conn_work);
826 flush_work(&rdev->event_work);
827 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
828 flush_work(&rdev->destroy_work);
829 flush_work(&rdev->sched_scan_stop_wk);
830 flush_work(&rdev->mlme_unreg_wk);
831
832#ifdef CONFIG_PM
833 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
834 rdev_set_wakeup(rdev, false);
835#endif
836 cfg80211_rdev_free_wowlan(rdev);
837 cfg80211_rdev_free_coalesce(rdev);
838}
839EXPORT_SYMBOL(wiphy_unregister);
840
841void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
842{
843 struct cfg80211_internal_bss *scan, *tmp;
844 struct cfg80211_beacon_registration *reg, *treg;
845 rfkill_destroy(rdev->rfkill);
846 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
847 list_del(®->list);
848 kfree(reg);
849 }
850 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
851 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
852 kfree(rdev);
853}
854
855void wiphy_free(struct wiphy *wiphy)
856{
857 put_device(&wiphy->dev);
858}
859EXPORT_SYMBOL(wiphy_free);
860
861void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
862{
863 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
864
865 if (rfkill_set_hw_state(rdev->rfkill, blocked))
866 schedule_work(&rdev->rfkill_sync);
867}
868EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
869
870void cfg80211_unregister_wdev(struct wireless_dev *wdev)
871{
872 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
873
874 ASSERT_RTNL();
875
876 if (WARN_ON(wdev->netdev))
877 return;
878
879 list_del_rcu(&wdev->list);
880 rdev->devlist_generation++;
881
882 switch (wdev->iftype) {
883 case NL80211_IFTYPE_P2P_DEVICE:
884 cfg80211_mlme_purge_registrations(wdev);
885 cfg80211_stop_p2p_device(rdev, wdev);
886 break;
887 default:
888 WARN_ON_ONCE(1);
889 break;
890 }
891}
892EXPORT_SYMBOL(cfg80211_unregister_wdev);
893
894static const struct device_type wiphy_type = {
895 .name = "wlan",
896};
897
898void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
899 enum nl80211_iftype iftype, int num)
900{
901 ASSERT_RTNL();
902
903 rdev->num_running_ifaces += num;
904 if (iftype == NL80211_IFTYPE_MONITOR)
905 rdev->num_running_monitor_ifaces += num;
906}
907
908void __cfg80211_leave(struct cfg80211_registered_device *rdev,
909 struct wireless_dev *wdev)
910{
911 struct net_device *dev = wdev->netdev;
912 struct cfg80211_sched_scan_request *sched_scan_req;
913
914 ASSERT_RTNL();
915 ASSERT_WDEV_LOCK(wdev);
916
917 switch (wdev->iftype) {
918 case NL80211_IFTYPE_ADHOC:
919 __cfg80211_leave_ibss(rdev, dev, true);
920 break;
921 case NL80211_IFTYPE_P2P_CLIENT:
922 case NL80211_IFTYPE_STATION:
923 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
924 if (sched_scan_req && dev == sched_scan_req->dev)
925 __cfg80211_stop_sched_scan(rdev, false);
926
927#ifdef CONFIG_CFG80211_WEXT
928 kfree(wdev->wext.ie);
929 wdev->wext.ie = NULL;
930 wdev->wext.ie_len = 0;
931 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
932#endif
933 cfg80211_disconnect(rdev, dev,
934 WLAN_REASON_DEAUTH_LEAVING, true);
935 break;
936 case NL80211_IFTYPE_MESH_POINT:
937 __cfg80211_leave_mesh(rdev, dev);
938 break;
939 case NL80211_IFTYPE_AP:
940 case NL80211_IFTYPE_P2P_GO:
941 __cfg80211_stop_ap(rdev, dev, true);
942 break;
943 case NL80211_IFTYPE_OCB:
944 __cfg80211_leave_ocb(rdev, dev);
945 break;
946 case NL80211_IFTYPE_WDS:
947
948 break;
949 case NL80211_IFTYPE_P2P_DEVICE:
950
951 break;
952 case NL80211_IFTYPE_AP_VLAN:
953 case NL80211_IFTYPE_MONITOR:
954
955 break;
956 case NL80211_IFTYPE_UNSPECIFIED:
957 case NUM_NL80211_IFTYPES:
958
959 break;
960 }
961}
962
963void cfg80211_leave(struct cfg80211_registered_device *rdev,
964 struct wireless_dev *wdev)
965{
966 wdev_lock(wdev);
967 __cfg80211_leave(rdev, wdev);
968 wdev_unlock(wdev);
969}
970
971void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
972 gfp_t gfp)
973{
974 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
975 struct cfg80211_event *ev;
976 unsigned long flags;
977
978 trace_cfg80211_stop_iface(wiphy, wdev);
979
980 ev = kzalloc(sizeof(*ev), gfp);
981 if (!ev)
982 return;
983
984 ev->type = EVENT_STOPPED;
985
986 spin_lock_irqsave(&wdev->event_lock, flags);
987 list_add_tail(&ev->list, &wdev->event_list);
988 spin_unlock_irqrestore(&wdev->event_lock, flags);
989 queue_work(cfg80211_wq, &rdev->event_work);
990}
991EXPORT_SYMBOL(cfg80211_stop_iface);
992
993static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
994 unsigned long state, void *ptr)
995{
996 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
997 struct wireless_dev *wdev = dev->ieee80211_ptr;
998 struct cfg80211_registered_device *rdev;
999 struct cfg80211_sched_scan_request *sched_scan_req;
1000
1001 if (!wdev)
1002 return NOTIFY_DONE;
1003
1004 rdev = wiphy_to_rdev(wdev->wiphy);
1005
1006 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1007
1008 switch (state) {
1009 case NETDEV_POST_INIT:
1010 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1011 break;
1012 case NETDEV_REGISTER:
1013
1014
1015
1016
1017
1018 mutex_init(&wdev->mtx);
1019 INIT_LIST_HEAD(&wdev->event_list);
1020 spin_lock_init(&wdev->event_lock);
1021 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1022 spin_lock_init(&wdev->mgmt_registrations_lock);
1023
1024 wdev->identifier = ++rdev->wdev_id;
1025 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1026 rdev->devlist_generation++;
1027
1028 dev->features |= NETIF_F_NETNS_LOCAL;
1029
1030 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1031 "phy80211")) {
1032 pr_err("failed to add phy80211 symlink to netdev!\n");
1033 }
1034 wdev->netdev = dev;
1035#ifdef CONFIG_CFG80211_WEXT
1036 wdev->wext.default_key = -1;
1037 wdev->wext.default_mgmt_key = -1;
1038 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1039#endif
1040
1041 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1042 wdev->ps = true;
1043 else
1044 wdev->ps = false;
1045
1046 wdev->ps_timeout = -1;
1047
1048 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1049 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1050 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1051 dev->priv_flags |= IFF_DONT_BRIDGE;
1052 break;
1053 case NETDEV_GOING_DOWN:
1054 cfg80211_leave(rdev, wdev);
1055 break;
1056 case NETDEV_DOWN:
1057 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1058 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1059 if (WARN_ON(!rdev->scan_req->notified))
1060 rdev->scan_req->aborted = true;
1061 ___cfg80211_scan_done(rdev, false);
1062 }
1063
1064 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1065 if (WARN_ON(sched_scan_req &&
1066 sched_scan_req->dev == wdev->netdev)) {
1067 __cfg80211_stop_sched_scan(rdev, false);
1068 }
1069
1070 rdev->opencount--;
1071 wake_up(&rdev->dev_wait);
1072 break;
1073 case NETDEV_UP:
1074 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1075 wdev_lock(wdev);
1076 switch (wdev->iftype) {
1077#ifdef CONFIG_CFG80211_WEXT
1078 case NL80211_IFTYPE_ADHOC:
1079 cfg80211_ibss_wext_join(rdev, wdev);
1080 break;
1081 case NL80211_IFTYPE_STATION:
1082 cfg80211_mgd_wext_connect(rdev, wdev);
1083 break;
1084#endif
1085#ifdef CONFIG_MAC80211_MESH
1086 case NL80211_IFTYPE_MESH_POINT:
1087 {
1088
1089 struct mesh_setup setup;
1090 memcpy(&setup, &default_mesh_setup,
1091 sizeof(setup));
1092
1093 setup.mesh_id = wdev->ssid;
1094 setup.mesh_id_len = wdev->mesh_id_up_len;
1095 if (wdev->mesh_id_up_len)
1096 __cfg80211_join_mesh(rdev, dev,
1097 &setup,
1098 &default_mesh_config);
1099 break;
1100 }
1101#endif
1102 default:
1103 break;
1104 }
1105 wdev_unlock(wdev);
1106 rdev->opencount++;
1107
1108
1109
1110
1111
1112 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1113 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1114 rdev->ops->set_power_mgmt)
1115 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1116 wdev->ps_timeout)) {
1117
1118 wdev->ps = false;
1119 }
1120 break;
1121 case NETDEV_UNREGISTER:
1122
1123
1124
1125
1126
1127
1128
1129 if (!list_empty(&wdev->list)) {
1130 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1131 list_del_rcu(&wdev->list);
1132 rdev->devlist_generation++;
1133 cfg80211_mlme_purge_registrations(wdev);
1134#ifdef CONFIG_CFG80211_WEXT
1135 kzfree(wdev->wext.keys);
1136#endif
1137 }
1138
1139
1140
1141
1142
1143
1144 synchronize_rcu();
1145 INIT_LIST_HEAD(&wdev->list);
1146
1147
1148
1149
1150 cfg80211_process_wdev_events(wdev);
1151
1152 if (WARN_ON(wdev->current_bss)) {
1153 cfg80211_unhold_bss(wdev->current_bss);
1154 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1155 wdev->current_bss = NULL;
1156 }
1157 break;
1158 case NETDEV_PRE_UP:
1159 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1160 return notifier_from_errno(-EOPNOTSUPP);
1161 if (rfkill_blocked(rdev->rfkill))
1162 return notifier_from_errno(-ERFKILL);
1163 break;
1164 default:
1165 return NOTIFY_DONE;
1166 }
1167
1168 wireless_nlevent_flush();
1169
1170 return NOTIFY_OK;
1171}
1172
1173static struct notifier_block cfg80211_netdev_notifier = {
1174 .notifier_call = cfg80211_netdev_notifier_call,
1175};
1176
1177static void __net_exit cfg80211_pernet_exit(struct net *net)
1178{
1179 struct cfg80211_registered_device *rdev;
1180
1181 rtnl_lock();
1182 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1183 if (net_eq(wiphy_net(&rdev->wiphy), net))
1184 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1185 }
1186 rtnl_unlock();
1187}
1188
1189static struct pernet_operations cfg80211_pernet_ops = {
1190 .exit = cfg80211_pernet_exit,
1191};
1192
1193static int __init cfg80211_init(void)
1194{
1195 int err;
1196
1197 err = register_pernet_device(&cfg80211_pernet_ops);
1198 if (err)
1199 goto out_fail_pernet;
1200
1201 err = wiphy_sysfs_init();
1202 if (err)
1203 goto out_fail_sysfs;
1204
1205 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1206 if (err)
1207 goto out_fail_notifier;
1208
1209 err = nl80211_init();
1210 if (err)
1211 goto out_fail_nl80211;
1212
1213 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1214
1215 err = regulatory_init();
1216 if (err)
1217 goto out_fail_reg;
1218
1219 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1220 if (!cfg80211_wq) {
1221 err = -ENOMEM;
1222 goto out_fail_wq;
1223 }
1224
1225 return 0;
1226
1227out_fail_wq:
1228 regulatory_exit();
1229out_fail_reg:
1230 debugfs_remove(ieee80211_debugfs_dir);
1231 nl80211_exit();
1232out_fail_nl80211:
1233 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1234out_fail_notifier:
1235 wiphy_sysfs_exit();
1236out_fail_sysfs:
1237 unregister_pernet_device(&cfg80211_pernet_ops);
1238out_fail_pernet:
1239 return err;
1240}
1241subsys_initcall(cfg80211_init);
1242
1243static void __exit cfg80211_exit(void)
1244{
1245 debugfs_remove(ieee80211_debugfs_dir);
1246 nl80211_exit();
1247 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1248 wiphy_sysfs_exit();
1249 regulatory_exit();
1250 unregister_pernet_device(&cfg80211_pernet_ops);
1251 destroy_workqueue(cfg80211_wq);
1252}
1253module_exit(cfg80211_exit);
1254
