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1f5a7e47 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
3b96766f | 5 | * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
1f5a7e47 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
11a843b7 JB |
12 | #include <linux/if_ether.h> |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/list.h> | |
d4e46a3d | 15 | #include <linux/rcupdate.h> |
db4d1169 | 16 | #include <linux/rtnetlink.h> |
1f5a7e47 JB |
17 | #include <net/mac80211.h> |
18 | #include "ieee80211_i.h" | |
19 | #include "debugfs_key.h" | |
20 | #include "aes_ccm.h" | |
21 | ||
11a843b7 | 22 | |
dbbea671 JB |
23 | /** |
24 | * DOC: Key handling basics | |
11a843b7 JB |
25 | * |
26 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
27 | * keys and per-station keys. Since each station belongs to an interface, | |
28 | * each station key also belongs to that interface. | |
29 | * | |
30 | * Hardware acceleration is done on a best-effort basis, for each key | |
31 | * that is eligible the hardware is asked to enable that key but if | |
32 | * it cannot do that they key is simply kept for software encryption. | |
33 | * There is currently no way of knowing this except by looking into | |
34 | * debugfs. | |
35 | * | |
3b96766f JB |
36 | * All key operations are protected internally so you can call them at |
37 | * any time. | |
db4d1169 | 38 | * |
3b96766f JB |
39 | * Within mac80211, key references are, just as STA structure references, |
40 | * protected by RCU. Note, however, that some things are unprotected, | |
41 | * namely the key->sta dereferences within the hardware acceleration | |
42 | * functions. This means that sta_info_destroy() must flush the key todo | |
43 | * list. | |
44 | * | |
45 | * All the direct key list manipulation functions must not sleep because | |
46 | * they can operate on STA info structs that are protected by RCU. | |
11a843b7 JB |
47 | */ |
48 | ||
49 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 50 | |
3b96766f JB |
51 | /* key mutex: used to synchronise todo runners */ |
52 | static DEFINE_MUTEX(key_mutex); | |
53 | static DEFINE_SPINLOCK(todo_lock); | |
54 | static LIST_HEAD(todo_list); | |
55 | ||
56 | static void key_todo(struct work_struct *work) | |
57 | { | |
58 | ieee80211_key_todo(); | |
59 | } | |
60 | ||
61 | static DECLARE_WORK(todo_work, key_todo); | |
62 | ||
63 | /** | |
64 | * add_todo - add todo item for a key | |
65 | * | |
66 | * @key: key to add to do item for | |
67 | * @flag: todo flag(s) | |
68 | */ | |
69 | static void add_todo(struct ieee80211_key *key, u32 flag) | |
70 | { | |
71 | if (!key) | |
72 | return; | |
73 | ||
74 | spin_lock(&todo_lock); | |
75 | key->flags |= flag; | |
245cbe7a JB |
76 | /* |
77 | * Remove again if already on the list so that we move it to the end. | |
78 | */ | |
79 | if (!list_empty(&key->todo)) | |
80 | list_del(&key->todo); | |
81 | list_add_tail(&key->todo, &todo_list); | |
3b96766f JB |
82 | schedule_work(&todo_work); |
83 | spin_unlock(&todo_lock); | |
84 | } | |
85 | ||
86 | /** | |
87 | * ieee80211_key_lock - lock the mac80211 key operation lock | |
88 | * | |
89 | * This locks the (global) mac80211 key operation lock, all | |
90 | * key operations must be done under this lock. | |
91 | */ | |
92 | static void ieee80211_key_lock(void) | |
93 | { | |
94 | mutex_lock(&key_mutex); | |
95 | } | |
96 | ||
97 | /** | |
98 | * ieee80211_key_unlock - unlock the mac80211 key operation lock | |
99 | */ | |
100 | static void ieee80211_key_unlock(void) | |
101 | { | |
102 | mutex_unlock(&key_mutex); | |
103 | } | |
104 | ||
105 | static void assert_key_lock(void) | |
106 | { | |
107 | WARN_ON(!mutex_is_locked(&key_mutex)); | |
108 | } | |
109 | ||
dc822b5d | 110 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 111 | { |
11a843b7 | 112 | if (key->sta) |
dc822b5d | 113 | return &key->sta->sta; |
11a843b7 | 114 | |
dc822b5d | 115 | return NULL; |
11a843b7 JB |
116 | } |
117 | ||
118 | static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key) | |
119 | { | |
dc822b5d JB |
120 | struct ieee80211_sub_if_data *sdata; |
121 | struct ieee80211_sta *sta; | |
11a843b7 JB |
122 | int ret; |
123 | ||
3b96766f JB |
124 | assert_key_lock(); |
125 | might_sleep(); | |
126 | ||
11a843b7 JB |
127 | if (!key->local->ops->set_key) |
128 | return; | |
129 | ||
dc822b5d JB |
130 | sta = get_sta_for_key(key); |
131 | ||
132 | sdata = key->sdata; | |
133 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
134 | sdata = container_of(sdata->bss, | |
135 | struct ieee80211_sub_if_data, | |
136 | u.ap); | |
11a843b7 JB |
137 | |
138 | ret = key->local->ops->set_key(local_to_hw(key->local), SET_KEY, | |
dc822b5d | 139 | &sdata->vif, sta, &key->conf); |
11a843b7 | 140 | |
3b96766f JB |
141 | if (!ret) { |
142 | spin_lock(&todo_lock); | |
11a843b7 | 143 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
3b96766f JB |
144 | spin_unlock(&todo_lock); |
145 | } | |
11a843b7 JB |
146 | |
147 | if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP) | |
148 | printk(KERN_ERR "mac80211-%s: failed to set key " | |
0c68ae26 | 149 | "(%d, %pM) to hardware (%d)\n", |
11a843b7 | 150 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 151 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 JB |
152 | } |
153 | ||
154 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
155 | { | |
dc822b5d JB |
156 | struct ieee80211_sub_if_data *sdata; |
157 | struct ieee80211_sta *sta; | |
11a843b7 JB |
158 | int ret; |
159 | ||
3b96766f JB |
160 | assert_key_lock(); |
161 | might_sleep(); | |
162 | ||
db4d1169 | 163 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
164 | return; |
165 | ||
3b96766f JB |
166 | spin_lock(&todo_lock); |
167 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) { | |
168 | spin_unlock(&todo_lock); | |
11a843b7 | 169 | return; |
3b96766f JB |
170 | } |
171 | spin_unlock(&todo_lock); | |
11a843b7 | 172 | |
dc822b5d JB |
173 | sta = get_sta_for_key(key); |
174 | sdata = key->sdata; | |
175 | ||
176 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
177 | sdata = container_of(sdata->bss, | |
178 | struct ieee80211_sub_if_data, | |
179 | u.ap); | |
11a843b7 JB |
180 | |
181 | ret = key->local->ops->set_key(local_to_hw(key->local), DISABLE_KEY, | |
dc822b5d | 182 | &sdata->vif, sta, &key->conf); |
11a843b7 JB |
183 | |
184 | if (ret) | |
185 | printk(KERN_ERR "mac80211-%s: failed to remove key " | |
0c68ae26 | 186 | "(%d, %pM) from hardware (%d)\n", |
11a843b7 | 187 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 188 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 | 189 | |
3b96766f JB |
190 | spin_lock(&todo_lock); |
191 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
192 | spin_unlock(&todo_lock); | |
193 | } | |
194 | ||
195 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
196 | int idx) | |
197 | { | |
198 | struct ieee80211_key *key = NULL; | |
199 | ||
200 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) | |
201 | key = sdata->keys[idx]; | |
202 | ||
203 | rcu_assign_pointer(sdata->default_key, key); | |
204 | ||
205 | if (key) | |
206 | add_todo(key, KEY_FLAG_TODO_DEFKEY); | |
207 | } | |
208 | ||
209 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx) | |
210 | { | |
211 | unsigned long flags; | |
212 | ||
b16bd15c | 213 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 214 | __ieee80211_set_default_key(sdata, idx); |
b16bd15c | 215 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
216 | } |
217 | ||
218 | ||
219 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
220 | struct sta_info *sta, | |
221 | struct ieee80211_key *old, | |
222 | struct ieee80211_key *new) | |
223 | { | |
224 | int idx, defkey; | |
225 | ||
226 | if (new) | |
227 | list_add(&new->list, &sdata->key_list); | |
228 | ||
229 | if (sta) { | |
230 | rcu_assign_pointer(sta->key, new); | |
231 | } else { | |
232 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
233 | ||
234 | if (old) | |
235 | idx = old->conf.keyidx; | |
236 | else | |
237 | idx = new->conf.keyidx; | |
238 | ||
239 | defkey = old && sdata->default_key == old; | |
240 | ||
241 | if (defkey && !new) | |
242 | __ieee80211_set_default_key(sdata, -1); | |
243 | ||
244 | rcu_assign_pointer(sdata->keys[idx], new); | |
245 | if (defkey && new) | |
246 | __ieee80211_set_default_key(sdata, new->conf.keyidx); | |
247 | } | |
248 | ||
249 | if (old) { | |
250 | /* | |
251 | * We'll use an empty list to indicate that the key | |
252 | * has already been removed. | |
253 | */ | |
254 | list_del_init(&old->list); | |
255 | } | |
11a843b7 JB |
256 | } |
257 | ||
db4d1169 | 258 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
11a843b7 JB |
259 | int idx, |
260 | size_t key_len, | |
261 | const u8 *key_data) | |
1f5a7e47 JB |
262 | { |
263 | struct ieee80211_key *key; | |
264 | ||
d4e46a3d | 265 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS); |
11a843b7 JB |
266 | |
267 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 JB |
268 | if (!key) |
269 | return NULL; | |
11a843b7 JB |
270 | |
271 | /* | |
272 | * Default to software encryption; we'll later upload the | |
273 | * key to the hardware if possible. | |
274 | */ | |
11a843b7 JB |
275 | key->conf.flags = 0; |
276 | key->flags = 0; | |
277 | ||
278 | key->conf.alg = alg; | |
279 | key->conf.keyidx = idx; | |
280 | key->conf.keylen = key_len; | |
76708dee FF |
281 | switch (alg) { |
282 | case ALG_WEP: | |
283 | key->conf.iv_len = WEP_IV_LEN; | |
284 | key->conf.icv_len = WEP_ICV_LEN; | |
285 | break; | |
286 | case ALG_TKIP: | |
287 | key->conf.iv_len = TKIP_IV_LEN; | |
288 | key->conf.icv_len = TKIP_ICV_LEN; | |
289 | break; | |
290 | case ALG_CCMP: | |
291 | key->conf.iv_len = CCMP_HDR_LEN; | |
292 | key->conf.icv_len = CCMP_MIC_LEN; | |
293 | break; | |
294 | } | |
11a843b7 | 295 | memcpy(key->conf.key, key_data, key_len); |
e4861829 | 296 | INIT_LIST_HEAD(&key->list); |
3b96766f | 297 | INIT_LIST_HEAD(&key->todo); |
11a843b7 | 298 | |
11a843b7 JB |
299 | if (alg == ALG_CCMP) { |
300 | /* | |
301 | * Initialize AES key state here as an optimization so that | |
302 | * it does not need to be initialized for every packet. | |
303 | */ | |
304 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
305 | if (!key->u.ccmp.tfm) { | |
3b96766f | 306 | kfree(key); |
11a843b7 JB |
307 | return NULL; |
308 | } | |
309 | } | |
310 | ||
db4d1169 JB |
311 | return key; |
312 | } | |
11a843b7 | 313 | |
db4d1169 JB |
314 | void ieee80211_key_link(struct ieee80211_key *key, |
315 | struct ieee80211_sub_if_data *sdata, | |
316 | struct sta_info *sta) | |
317 | { | |
318 | struct ieee80211_key *old_key; | |
3b96766f | 319 | unsigned long flags; |
db4d1169 JB |
320 | int idx; |
321 | ||
db4d1169 JB |
322 | BUG_ON(!sdata); |
323 | BUG_ON(!key); | |
324 | ||
325 | idx = key->conf.keyidx; | |
326 | key->local = sdata->local; | |
327 | key->sdata = sdata; | |
328 | key->sta = sta; | |
329 | ||
11a843b7 | 330 | if (sta) { |
11a843b7 JB |
331 | /* |
332 | * some hardware cannot handle TKIP with QoS, so | |
333 | * we indicate whether QoS could be in use. | |
334 | */ | |
07346f81 | 335 | if (test_sta_flags(sta, WLAN_STA_WME)) |
11a843b7 | 336 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
c6adbd21 ID |
337 | |
338 | /* | |
339 | * This key is for a specific sta interface, | |
340 | * inform the driver that it should try to store | |
341 | * this key as pairwise key. | |
342 | */ | |
343 | key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE; | |
11a843b7 | 344 | } else { |
05c914fe | 345 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
346 | struct sta_info *ap; |
347 | ||
3b96766f JB |
348 | /* |
349 | * We're getting a sta pointer in, | |
350 | * so must be under RCU read lock. | |
351 | */ | |
d0709a65 | 352 | |
11a843b7 JB |
353 | /* same here, the AP could be using QoS */ |
354 | ap = sta_info_get(key->local, key->sdata->u.sta.bssid); | |
355 | if (ap) { | |
07346f81 | 356 | if (test_sta_flags(ap, WLAN_STA_WME)) |
11a843b7 JB |
357 | key->conf.flags |= |
358 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
359 | } |
360 | } | |
11a843b7 JB |
361 | } |
362 | ||
b16bd15c | 363 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 364 | |
d4e46a3d | 365 | if (sta) |
db4d1169 | 366 | old_key = sta->key; |
d4e46a3d | 367 | else |
db4d1169 JB |
368 | old_key = sdata->keys[idx]; |
369 | ||
370 | __ieee80211_key_replace(sdata, sta, old_key, key); | |
d4e46a3d | 371 | |
b16bd15c | 372 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
373 | |
374 | /* free old key later */ | |
375 | add_todo(old_key, KEY_FLAG_TODO_DELETE); | |
db4d1169 | 376 | |
3b96766f | 377 | add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS); |
e4861829 | 378 | if (netif_running(sdata->dev)) |
3a245766 | 379 | add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD); |
1f5a7e47 JB |
380 | } |
381 | ||
3a245766 | 382 | static void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 383 | { |
3b96766f JB |
384 | /* |
385 | * Replace key with nothingness if it was ever used. | |
386 | */ | |
3a245766 | 387 | if (key->sdata) |
3b96766f JB |
388 | __ieee80211_key_replace(key->sdata, key->sta, |
389 | key, NULL); | |
11a843b7 | 390 | |
3b96766f JB |
391 | add_todo(key, KEY_FLAG_TODO_DELETE); |
392 | } | |
d4e46a3d | 393 | |
3a245766 | 394 | void ieee80211_key_free(struct ieee80211_key *key) |
3b96766f | 395 | { |
3a245766 | 396 | unsigned long flags; |
11a843b7 | 397 | |
3a245766 | 398 | if (!key) |
3b96766f JB |
399 | return; |
400 | ||
00eb7fe7 EG |
401 | if (!key->sdata) { |
402 | /* The key has not been linked yet, simply free it | |
403 | * and don't Oops */ | |
404 | if (key->conf.alg == ALG_CCMP) | |
405 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
406 | kfree(key); | |
407 | return; | |
408 | } | |
409 | ||
b16bd15c | 410 | spin_lock_irqsave(&key->sdata->local->key_lock, flags); |
3a245766 | 411 | __ieee80211_key_free(key); |
b16bd15c | 412 | spin_unlock_irqrestore(&key->sdata->local->key_lock, flags); |
3a245766 JB |
413 | } |
414 | ||
415 | /* | |
416 | * To be safe against concurrent manipulations of the list (which shouldn't | |
417 | * actually happen) we need to hold the spinlock. But under the spinlock we | |
418 | * can't actually do much, so we defer processing to the todo list. Then run | |
419 | * the todo list to be sure the operation and possibly previously pending | |
420 | * operations are completed. | |
421 | */ | |
422 | static void ieee80211_todo_for_each_key(struct ieee80211_sub_if_data *sdata, | |
423 | u32 todo_flags) | |
424 | { | |
425 | struct ieee80211_key *key; | |
426 | unsigned long flags; | |
3b96766f | 427 | |
3a245766 JB |
428 | might_sleep(); |
429 | ||
b16bd15c | 430 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 431 | list_for_each_entry(key, &sdata->key_list, list) |
3a245766 | 432 | add_todo(key, todo_flags); |
b16bd15c | 433 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f | 434 | |
3a245766 | 435 | ieee80211_key_todo(); |
1f5a7e47 | 436 | } |
11a843b7 | 437 | |
3a245766 | 438 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 | 439 | { |
3a245766 | 440 | ASSERT_RTNL(); |
11a843b7 | 441 | |
3a245766 JB |
442 | if (WARN_ON(!netif_running(sdata->dev))) |
443 | return; | |
11a843b7 | 444 | |
3a245766 JB |
445 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_ADD); |
446 | } | |
11a843b7 | 447 | |
3a245766 JB |
448 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
449 | { | |
450 | ASSERT_RTNL(); | |
11a843b7 | 451 | |
3a245766 | 452 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_REMOVE); |
11a843b7 JB |
453 | } |
454 | ||
3a245766 | 455 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
11a843b7 | 456 | { |
3b96766f JB |
457 | if (!key) |
458 | return; | |
db4d1169 | 459 | |
3b96766f | 460 | ieee80211_key_disable_hw_accel(key); |
11a843b7 | 461 | |
3b96766f JB |
462 | if (key->conf.alg == ALG_CCMP) |
463 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
464 | ieee80211_debugfs_key_remove(key); | |
465 | ||
466 | kfree(key); | |
11a843b7 JB |
467 | } |
468 | ||
3b96766f | 469 | static void __ieee80211_key_todo(void) |
11a843b7 JB |
470 | { |
471 | struct ieee80211_key *key; | |
3b96766f JB |
472 | bool work_done; |
473 | u32 todoflags; | |
11a843b7 | 474 | |
3b96766f JB |
475 | /* |
476 | * NB: sta_info_destroy relies on this! | |
477 | */ | |
478 | synchronize_rcu(); | |
479 | ||
480 | spin_lock(&todo_lock); | |
481 | while (!list_empty(&todo_list)) { | |
482 | key = list_first_entry(&todo_list, struct ieee80211_key, todo); | |
483 | list_del_init(&key->todo); | |
484 | todoflags = key->flags & (KEY_FLAG_TODO_ADD_DEBUGFS | | |
485 | KEY_FLAG_TODO_DEFKEY | | |
3a245766 JB |
486 | KEY_FLAG_TODO_HWACCEL_ADD | |
487 | KEY_FLAG_TODO_HWACCEL_REMOVE | | |
3b96766f JB |
488 | KEY_FLAG_TODO_DELETE); |
489 | key->flags &= ~todoflags; | |
490 | spin_unlock(&todo_lock); | |
491 | ||
492 | work_done = false; | |
493 | ||
494 | if (todoflags & KEY_FLAG_TODO_ADD_DEBUGFS) { | |
495 | ieee80211_debugfs_key_add(key); | |
496 | work_done = true; | |
497 | } | |
498 | if (todoflags & KEY_FLAG_TODO_DEFKEY) { | |
499 | ieee80211_debugfs_key_remove_default(key->sdata); | |
500 | ieee80211_debugfs_key_add_default(key->sdata); | |
501 | work_done = true; | |
502 | } | |
3a245766 | 503 | if (todoflags & KEY_FLAG_TODO_HWACCEL_ADD) { |
3b96766f JB |
504 | ieee80211_key_enable_hw_accel(key); |
505 | work_done = true; | |
506 | } | |
3a245766 JB |
507 | if (todoflags & KEY_FLAG_TODO_HWACCEL_REMOVE) { |
508 | ieee80211_key_disable_hw_accel(key); | |
509 | work_done = true; | |
510 | } | |
3b96766f | 511 | if (todoflags & KEY_FLAG_TODO_DELETE) { |
3a245766 | 512 | __ieee80211_key_destroy(key); |
3b96766f JB |
513 | work_done = true; |
514 | } | |
db4d1169 | 515 | |
3b96766f | 516 | WARN_ON(!work_done); |
11a843b7 | 517 | |
3b96766f JB |
518 | spin_lock(&todo_lock); |
519 | } | |
520 | spin_unlock(&todo_lock); | |
11a843b7 JB |
521 | } |
522 | ||
3b96766f | 523 | void ieee80211_key_todo(void) |
11a843b7 | 524 | { |
3b96766f JB |
525 | ieee80211_key_lock(); |
526 | __ieee80211_key_todo(); | |
527 | ieee80211_key_unlock(); | |
528 | } | |
11a843b7 | 529 | |
3b96766f JB |
530 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
531 | { | |
532 | struct ieee80211_key *key, *tmp; | |
3a245766 | 533 | unsigned long flags; |
db4d1169 | 534 | |
3b96766f JB |
535 | ieee80211_key_lock(); |
536 | ||
537 | ieee80211_debugfs_key_remove_default(sdata); | |
538 | ||
b16bd15c | 539 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 540 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
3a245766 | 541 | __ieee80211_key_free(key); |
b16bd15c | 542 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
543 | |
544 | __ieee80211_key_todo(); | |
545 | ||
546 | ieee80211_key_unlock(); | |
11a843b7 | 547 | } |