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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" | |
24487981 | 19 | #include "driver-ops.h" |
1f5a7e47 JB |
20 | #include "debugfs_key.h" |
21 | #include "aes_ccm.h" | |
3cfcf6ac | 22 | #include "aes_cmac.h" |
1f5a7e47 | 23 | |
11a843b7 | 24 | |
dbbea671 JB |
25 | /** |
26 | * DOC: Key handling basics | |
11a843b7 JB |
27 | * |
28 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
29 | * keys and per-station keys. Since each station belongs to an interface, | |
30 | * each station key also belongs to that interface. | |
31 | * | |
32 | * Hardware acceleration is done on a best-effort basis, for each key | |
33 | * that is eligible the hardware is asked to enable that key but if | |
34 | * it cannot do that they key is simply kept for software encryption. | |
35 | * There is currently no way of knowing this except by looking into | |
36 | * debugfs. | |
37 | * | |
3b96766f JB |
38 | * All key operations are protected internally so you can call them at |
39 | * any time. | |
db4d1169 | 40 | * |
3b96766f JB |
41 | * Within mac80211, key references are, just as STA structure references, |
42 | * protected by RCU. Note, however, that some things are unprotected, | |
43 | * namely the key->sta dereferences within the hardware acceleration | |
44 | * functions. This means that sta_info_destroy() must flush the key todo | |
45 | * list. | |
46 | * | |
47 | * All the direct key list manipulation functions must not sleep because | |
48 | * they can operate on STA info structs that are protected by RCU. | |
11a843b7 JB |
49 | */ |
50 | ||
51 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 52 | |
3b96766f JB |
53 | /* key mutex: used to synchronise todo runners */ |
54 | static DEFINE_MUTEX(key_mutex); | |
55 | static DEFINE_SPINLOCK(todo_lock); | |
56 | static LIST_HEAD(todo_list); | |
57 | ||
58 | static void key_todo(struct work_struct *work) | |
59 | { | |
60 | ieee80211_key_todo(); | |
61 | } | |
62 | ||
63 | static DECLARE_WORK(todo_work, key_todo); | |
64 | ||
65 | /** | |
66 | * add_todo - add todo item for a key | |
67 | * | |
68 | * @key: key to add to do item for | |
69 | * @flag: todo flag(s) | |
70 | */ | |
71 | static void add_todo(struct ieee80211_key *key, u32 flag) | |
72 | { | |
73 | if (!key) | |
74 | return; | |
75 | ||
76 | spin_lock(&todo_lock); | |
77 | key->flags |= flag; | |
245cbe7a JB |
78 | /* |
79 | * Remove again if already on the list so that we move it to the end. | |
80 | */ | |
81 | if (!list_empty(&key->todo)) | |
82 | list_del(&key->todo); | |
83 | list_add_tail(&key->todo, &todo_list); | |
3b96766f JB |
84 | schedule_work(&todo_work); |
85 | spin_unlock(&todo_lock); | |
86 | } | |
87 | ||
88 | /** | |
89 | * ieee80211_key_lock - lock the mac80211 key operation lock | |
90 | * | |
91 | * This locks the (global) mac80211 key operation lock, all | |
92 | * key operations must be done under this lock. | |
93 | */ | |
94 | static void ieee80211_key_lock(void) | |
95 | { | |
96 | mutex_lock(&key_mutex); | |
97 | } | |
98 | ||
99 | /** | |
100 | * ieee80211_key_unlock - unlock the mac80211 key operation lock | |
101 | */ | |
102 | static void ieee80211_key_unlock(void) | |
103 | { | |
104 | mutex_unlock(&key_mutex); | |
105 | } | |
106 | ||
107 | static void assert_key_lock(void) | |
108 | { | |
109 | WARN_ON(!mutex_is_locked(&key_mutex)); | |
110 | } | |
111 | ||
dc822b5d | 112 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 113 | { |
11a843b7 | 114 | if (key->sta) |
dc822b5d | 115 | return &key->sta->sta; |
11a843b7 | 116 | |
dc822b5d | 117 | return NULL; |
11a843b7 JB |
118 | } |
119 | ||
120 | static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key) | |
121 | { | |
dc822b5d JB |
122 | struct ieee80211_sub_if_data *sdata; |
123 | struct ieee80211_sta *sta; | |
11a843b7 JB |
124 | int ret; |
125 | ||
3b96766f JB |
126 | assert_key_lock(); |
127 | might_sleep(); | |
128 | ||
11a843b7 JB |
129 | if (!key->local->ops->set_key) |
130 | return; | |
131 | ||
dc822b5d JB |
132 | sta = get_sta_for_key(key); |
133 | ||
134 | sdata = key->sdata; | |
135 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
136 | sdata = container_of(sdata->bss, | |
137 | struct ieee80211_sub_if_data, | |
138 | u.ap); | |
11a843b7 | 139 | |
24487981 | 140 | ret = drv_set_key(key->local, SET_KEY, &sdata->vif, sta, &key->conf); |
11a843b7 | 141 | |
3b96766f JB |
142 | if (!ret) { |
143 | spin_lock(&todo_lock); | |
11a843b7 | 144 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
3b96766f JB |
145 | spin_unlock(&todo_lock); |
146 | } | |
11a843b7 JB |
147 | |
148 | if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP) | |
149 | printk(KERN_ERR "mac80211-%s: failed to set key " | |
0c68ae26 | 150 | "(%d, %pM) to hardware (%d)\n", |
11a843b7 | 151 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 152 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 JB |
153 | } |
154 | ||
155 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
156 | { | |
dc822b5d JB |
157 | struct ieee80211_sub_if_data *sdata; |
158 | struct ieee80211_sta *sta; | |
11a843b7 JB |
159 | int ret; |
160 | ||
3b96766f JB |
161 | assert_key_lock(); |
162 | might_sleep(); | |
163 | ||
db4d1169 | 164 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
165 | return; |
166 | ||
3b96766f JB |
167 | spin_lock(&todo_lock); |
168 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) { | |
169 | spin_unlock(&todo_lock); | |
11a843b7 | 170 | return; |
3b96766f JB |
171 | } |
172 | spin_unlock(&todo_lock); | |
11a843b7 | 173 | |
dc822b5d JB |
174 | sta = get_sta_for_key(key); |
175 | sdata = key->sdata; | |
176 | ||
177 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
178 | sdata = container_of(sdata->bss, | |
179 | struct ieee80211_sub_if_data, | |
180 | u.ap); | |
11a843b7 | 181 | |
24487981 JB |
182 | ret = drv_set_key(key->local, DISABLE_KEY, &sdata->vif, |
183 | sta, &key->conf); | |
11a843b7 JB |
184 | |
185 | if (ret) | |
186 | printk(KERN_ERR "mac80211-%s: failed to remove key " | |
0c68ae26 | 187 | "(%d, %pM) from hardware (%d)\n", |
11a843b7 | 188 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 189 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 | 190 | |
3b96766f JB |
191 | spin_lock(&todo_lock); |
192 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
193 | spin_unlock(&todo_lock); | |
194 | } | |
195 | ||
196 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
197 | int idx) | |
198 | { | |
199 | struct ieee80211_key *key = NULL; | |
200 | ||
201 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) | |
202 | key = sdata->keys[idx]; | |
203 | ||
204 | rcu_assign_pointer(sdata->default_key, key); | |
205 | ||
206 | if (key) | |
207 | add_todo(key, KEY_FLAG_TODO_DEFKEY); | |
208 | } | |
209 | ||
210 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx) | |
211 | { | |
212 | unsigned long flags; | |
213 | ||
b16bd15c | 214 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 215 | __ieee80211_set_default_key(sdata, idx); |
b16bd15c | 216 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
217 | } |
218 | ||
3cfcf6ac JM |
219 | static void |
220 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
221 | { | |
222 | struct ieee80211_key *key = NULL; | |
223 | ||
224 | if (idx >= NUM_DEFAULT_KEYS && | |
225 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
226 | key = sdata->keys[idx]; | |
227 | ||
228 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
229 | ||
230 | if (key) | |
231 | add_todo(key, KEY_FLAG_TODO_DEFMGMTKEY); | |
232 | } | |
233 | ||
234 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
235 | int idx) | |
236 | { | |
237 | unsigned long flags; | |
238 | ||
239 | spin_lock_irqsave(&sdata->local->key_lock, flags); | |
240 | __ieee80211_set_default_mgmt_key(sdata, idx); | |
241 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); | |
242 | } | |
243 | ||
3b96766f JB |
244 | |
245 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
246 | struct sta_info *sta, | |
247 | struct ieee80211_key *old, | |
248 | struct ieee80211_key *new) | |
249 | { | |
3cfcf6ac | 250 | int idx, defkey, defmgmtkey; |
3b96766f JB |
251 | |
252 | if (new) | |
253 | list_add(&new->list, &sdata->key_list); | |
254 | ||
255 | if (sta) { | |
256 | rcu_assign_pointer(sta->key, new); | |
257 | } else { | |
258 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
259 | ||
260 | if (old) | |
261 | idx = old->conf.keyidx; | |
262 | else | |
263 | idx = new->conf.keyidx; | |
264 | ||
265 | defkey = old && sdata->default_key == old; | |
3cfcf6ac | 266 | defmgmtkey = old && sdata->default_mgmt_key == old; |
3b96766f JB |
267 | |
268 | if (defkey && !new) | |
269 | __ieee80211_set_default_key(sdata, -1); | |
3cfcf6ac JM |
270 | if (defmgmtkey && !new) |
271 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
272 | |
273 | rcu_assign_pointer(sdata->keys[idx], new); | |
274 | if (defkey && new) | |
275 | __ieee80211_set_default_key(sdata, new->conf.keyidx); | |
3cfcf6ac JM |
276 | if (defmgmtkey && new) |
277 | __ieee80211_set_default_mgmt_key(sdata, | |
278 | new->conf.keyidx); | |
3b96766f JB |
279 | } |
280 | ||
281 | if (old) { | |
282 | /* | |
283 | * We'll use an empty list to indicate that the key | |
284 | * has already been removed. | |
285 | */ | |
286 | list_del_init(&old->list); | |
287 | } | |
11a843b7 JB |
288 | } |
289 | ||
db4d1169 | 290 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
11a843b7 JB |
291 | int idx, |
292 | size_t key_len, | |
293 | const u8 *key_data) | |
1f5a7e47 JB |
294 | { |
295 | struct ieee80211_key *key; | |
296 | ||
3cfcf6ac | 297 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
11a843b7 JB |
298 | |
299 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 JB |
300 | if (!key) |
301 | return NULL; | |
11a843b7 JB |
302 | |
303 | /* | |
304 | * Default to software encryption; we'll later upload the | |
305 | * key to the hardware if possible. | |
306 | */ | |
11a843b7 JB |
307 | key->conf.flags = 0; |
308 | key->flags = 0; | |
309 | ||
310 | key->conf.alg = alg; | |
311 | key->conf.keyidx = idx; | |
312 | key->conf.keylen = key_len; | |
76708dee FF |
313 | switch (alg) { |
314 | case ALG_WEP: | |
315 | key->conf.iv_len = WEP_IV_LEN; | |
316 | key->conf.icv_len = WEP_ICV_LEN; | |
317 | break; | |
318 | case ALG_TKIP: | |
319 | key->conf.iv_len = TKIP_IV_LEN; | |
320 | key->conf.icv_len = TKIP_ICV_LEN; | |
321 | break; | |
322 | case ALG_CCMP: | |
323 | key->conf.iv_len = CCMP_HDR_LEN; | |
324 | key->conf.icv_len = CCMP_MIC_LEN; | |
325 | break; | |
3cfcf6ac JM |
326 | case ALG_AES_CMAC: |
327 | key->conf.iv_len = 0; | |
328 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
329 | break; | |
76708dee | 330 | } |
11a843b7 | 331 | memcpy(key->conf.key, key_data, key_len); |
e4861829 | 332 | INIT_LIST_HEAD(&key->list); |
3b96766f | 333 | INIT_LIST_HEAD(&key->todo); |
11a843b7 | 334 | |
11a843b7 JB |
335 | if (alg == ALG_CCMP) { |
336 | /* | |
337 | * Initialize AES key state here as an optimization so that | |
338 | * it does not need to be initialized for every packet. | |
339 | */ | |
340 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
341 | if (!key->u.ccmp.tfm) { | |
3b96766f | 342 | kfree(key); |
11a843b7 JB |
343 | return NULL; |
344 | } | |
345 | } | |
346 | ||
3cfcf6ac JM |
347 | if (alg == ALG_AES_CMAC) { |
348 | /* | |
349 | * Initialize AES key state here as an optimization so that | |
350 | * it does not need to be initialized for every packet. | |
351 | */ | |
352 | key->u.aes_cmac.tfm = | |
353 | ieee80211_aes_cmac_key_setup(key_data); | |
354 | if (!key->u.aes_cmac.tfm) { | |
355 | kfree(key); | |
356 | return NULL; | |
357 | } | |
358 | } | |
359 | ||
db4d1169 JB |
360 | return key; |
361 | } | |
11a843b7 | 362 | |
db4d1169 JB |
363 | void ieee80211_key_link(struct ieee80211_key *key, |
364 | struct ieee80211_sub_if_data *sdata, | |
365 | struct sta_info *sta) | |
366 | { | |
367 | struct ieee80211_key *old_key; | |
3b96766f | 368 | unsigned long flags; |
db4d1169 JB |
369 | int idx; |
370 | ||
db4d1169 JB |
371 | BUG_ON(!sdata); |
372 | BUG_ON(!key); | |
373 | ||
374 | idx = key->conf.keyidx; | |
375 | key->local = sdata->local; | |
376 | key->sdata = sdata; | |
377 | key->sta = sta; | |
378 | ||
11a843b7 | 379 | if (sta) { |
11a843b7 JB |
380 | /* |
381 | * some hardware cannot handle TKIP with QoS, so | |
382 | * we indicate whether QoS could be in use. | |
383 | */ | |
07346f81 | 384 | if (test_sta_flags(sta, WLAN_STA_WME)) |
11a843b7 | 385 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
c6adbd21 ID |
386 | |
387 | /* | |
388 | * This key is for a specific sta interface, | |
389 | * inform the driver that it should try to store | |
390 | * this key as pairwise key. | |
391 | */ | |
392 | key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE; | |
11a843b7 | 393 | } else { |
05c914fe | 394 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
395 | struct sta_info *ap; |
396 | ||
3b96766f JB |
397 | /* |
398 | * We're getting a sta pointer in, | |
399 | * so must be under RCU read lock. | |
400 | */ | |
d0709a65 | 401 | |
11a843b7 | 402 | /* same here, the AP could be using QoS */ |
46900298 | 403 | ap = sta_info_get(key->local, key->sdata->u.mgd.bssid); |
11a843b7 | 404 | if (ap) { |
07346f81 | 405 | if (test_sta_flags(ap, WLAN_STA_WME)) |
11a843b7 JB |
406 | key->conf.flags |= |
407 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
408 | } |
409 | } | |
11a843b7 JB |
410 | } |
411 | ||
b16bd15c | 412 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 413 | |
d4e46a3d | 414 | if (sta) |
db4d1169 | 415 | old_key = sta->key; |
d4e46a3d | 416 | else |
db4d1169 JB |
417 | old_key = sdata->keys[idx]; |
418 | ||
419 | __ieee80211_key_replace(sdata, sta, old_key, key); | |
d4e46a3d | 420 | |
b16bd15c | 421 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
422 | |
423 | /* free old key later */ | |
424 | add_todo(old_key, KEY_FLAG_TODO_DELETE); | |
db4d1169 | 425 | |
3b96766f | 426 | add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS); |
e4861829 | 427 | if (netif_running(sdata->dev)) |
3a245766 | 428 | add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD); |
1f5a7e47 JB |
429 | } |
430 | ||
3a245766 | 431 | static void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 432 | { |
3b96766f JB |
433 | /* |
434 | * Replace key with nothingness if it was ever used. | |
435 | */ | |
3a245766 | 436 | if (key->sdata) |
3b96766f JB |
437 | __ieee80211_key_replace(key->sdata, key->sta, |
438 | key, NULL); | |
11a843b7 | 439 | |
3b96766f JB |
440 | add_todo(key, KEY_FLAG_TODO_DELETE); |
441 | } | |
d4e46a3d | 442 | |
3a245766 | 443 | void ieee80211_key_free(struct ieee80211_key *key) |
3b96766f | 444 | { |
3a245766 | 445 | unsigned long flags; |
11a843b7 | 446 | |
3a245766 | 447 | if (!key) |
3b96766f JB |
448 | return; |
449 | ||
00eb7fe7 EG |
450 | if (!key->sdata) { |
451 | /* The key has not been linked yet, simply free it | |
452 | * and don't Oops */ | |
453 | if (key->conf.alg == ALG_CCMP) | |
454 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
455 | kfree(key); | |
456 | return; | |
457 | } | |
458 | ||
b16bd15c | 459 | spin_lock_irqsave(&key->sdata->local->key_lock, flags); |
3a245766 | 460 | __ieee80211_key_free(key); |
b16bd15c | 461 | spin_unlock_irqrestore(&key->sdata->local->key_lock, flags); |
3a245766 JB |
462 | } |
463 | ||
464 | /* | |
465 | * To be safe against concurrent manipulations of the list (which shouldn't | |
466 | * actually happen) we need to hold the spinlock. But under the spinlock we | |
467 | * can't actually do much, so we defer processing to the todo list. Then run | |
468 | * the todo list to be sure the operation and possibly previously pending | |
469 | * operations are completed. | |
470 | */ | |
471 | static void ieee80211_todo_for_each_key(struct ieee80211_sub_if_data *sdata, | |
472 | u32 todo_flags) | |
473 | { | |
474 | struct ieee80211_key *key; | |
475 | unsigned long flags; | |
3b96766f | 476 | |
3a245766 JB |
477 | might_sleep(); |
478 | ||
b16bd15c | 479 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 480 | list_for_each_entry(key, &sdata->key_list, list) |
3a245766 | 481 | add_todo(key, todo_flags); |
b16bd15c | 482 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f | 483 | |
3a245766 | 484 | ieee80211_key_todo(); |
1f5a7e47 | 485 | } |
11a843b7 | 486 | |
3a245766 | 487 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 | 488 | { |
3a245766 | 489 | ASSERT_RTNL(); |
11a843b7 | 490 | |
3a245766 JB |
491 | if (WARN_ON(!netif_running(sdata->dev))) |
492 | return; | |
11a843b7 | 493 | |
3a245766 JB |
494 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_ADD); |
495 | } | |
11a843b7 | 496 | |
3a245766 JB |
497 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
498 | { | |
499 | ASSERT_RTNL(); | |
11a843b7 | 500 | |
3a245766 | 501 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_REMOVE); |
11a843b7 JB |
502 | } |
503 | ||
3a245766 | 504 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
11a843b7 | 505 | { |
3b96766f JB |
506 | if (!key) |
507 | return; | |
db4d1169 | 508 | |
3b96766f | 509 | ieee80211_key_disable_hw_accel(key); |
11a843b7 | 510 | |
3b96766f JB |
511 | if (key->conf.alg == ALG_CCMP) |
512 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
3cfcf6ac JM |
513 | if (key->conf.alg == ALG_AES_CMAC) |
514 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); | |
3b96766f JB |
515 | ieee80211_debugfs_key_remove(key); |
516 | ||
517 | kfree(key); | |
11a843b7 JB |
518 | } |
519 | ||
3b96766f | 520 | static void __ieee80211_key_todo(void) |
11a843b7 JB |
521 | { |
522 | struct ieee80211_key *key; | |
3b96766f JB |
523 | bool work_done; |
524 | u32 todoflags; | |
11a843b7 | 525 | |
3b96766f JB |
526 | /* |
527 | * NB: sta_info_destroy relies on this! | |
528 | */ | |
529 | synchronize_rcu(); | |
530 | ||
531 | spin_lock(&todo_lock); | |
532 | while (!list_empty(&todo_list)) { | |
533 | key = list_first_entry(&todo_list, struct ieee80211_key, todo); | |
534 | list_del_init(&key->todo); | |
535 | todoflags = key->flags & (KEY_FLAG_TODO_ADD_DEBUGFS | | |
536 | KEY_FLAG_TODO_DEFKEY | | |
3cfcf6ac | 537 | KEY_FLAG_TODO_DEFMGMTKEY | |
3a245766 JB |
538 | KEY_FLAG_TODO_HWACCEL_ADD | |
539 | KEY_FLAG_TODO_HWACCEL_REMOVE | | |
3b96766f JB |
540 | KEY_FLAG_TODO_DELETE); |
541 | key->flags &= ~todoflags; | |
542 | spin_unlock(&todo_lock); | |
543 | ||
544 | work_done = false; | |
545 | ||
546 | if (todoflags & KEY_FLAG_TODO_ADD_DEBUGFS) { | |
547 | ieee80211_debugfs_key_add(key); | |
548 | work_done = true; | |
549 | } | |
550 | if (todoflags & KEY_FLAG_TODO_DEFKEY) { | |
551 | ieee80211_debugfs_key_remove_default(key->sdata); | |
552 | ieee80211_debugfs_key_add_default(key->sdata); | |
553 | work_done = true; | |
554 | } | |
3cfcf6ac JM |
555 | if (todoflags & KEY_FLAG_TODO_DEFMGMTKEY) { |
556 | ieee80211_debugfs_key_remove_mgmt_default(key->sdata); | |
557 | ieee80211_debugfs_key_add_mgmt_default(key->sdata); | |
558 | work_done = true; | |
559 | } | |
3a245766 | 560 | if (todoflags & KEY_FLAG_TODO_HWACCEL_ADD) { |
3b96766f JB |
561 | ieee80211_key_enable_hw_accel(key); |
562 | work_done = true; | |
563 | } | |
3a245766 JB |
564 | if (todoflags & KEY_FLAG_TODO_HWACCEL_REMOVE) { |
565 | ieee80211_key_disable_hw_accel(key); | |
566 | work_done = true; | |
567 | } | |
3b96766f | 568 | if (todoflags & KEY_FLAG_TODO_DELETE) { |
3a245766 | 569 | __ieee80211_key_destroy(key); |
3b96766f JB |
570 | work_done = true; |
571 | } | |
db4d1169 | 572 | |
3b96766f | 573 | WARN_ON(!work_done); |
11a843b7 | 574 | |
3b96766f JB |
575 | spin_lock(&todo_lock); |
576 | } | |
577 | spin_unlock(&todo_lock); | |
11a843b7 JB |
578 | } |
579 | ||
3b96766f | 580 | void ieee80211_key_todo(void) |
11a843b7 | 581 | { |
3b96766f JB |
582 | ieee80211_key_lock(); |
583 | __ieee80211_key_todo(); | |
584 | ieee80211_key_unlock(); | |
585 | } | |
11a843b7 | 586 | |
3b96766f JB |
587 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
588 | { | |
589 | struct ieee80211_key *key, *tmp; | |
3a245766 | 590 | unsigned long flags; |
db4d1169 | 591 | |
3b96766f JB |
592 | ieee80211_key_lock(); |
593 | ||
594 | ieee80211_debugfs_key_remove_default(sdata); | |
3cfcf6ac | 595 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f | 596 | |
b16bd15c | 597 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 598 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
3a245766 | 599 | __ieee80211_key_free(key); |
b16bd15c | 600 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
601 | |
602 | __ieee80211_key_todo(); | |
603 | ||
604 | ieee80211_key_unlock(); | |
11a843b7 | 605 | } |