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