blob: 999f7aa423267a33c525ee5693244f0c67070a30 [file] [log] [blame]
Johannes Berg1f5a7e42007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
Johannes Berg3b967662008-04-08 17:56:52 +02005 * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
Johannes Berg1f5a7e42007-07-27 15:43:23 +02006 *
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
Johannes Berg11a843b2007-08-28 17:01:55 -040012#include <linux/if_ether.h>
13#include <linux/etherdevice.h>
14#include <linux/list.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040015#include <linux/rcupdate.h>
Johannes Bergdb4d1162008-02-25 16:27:45 +010016#include <linux/rtnetlink.h>
Johannes Berg1f5a7e42007-07-27 15:43:23 +020017#include <net/mac80211.h>
18#include "ieee80211_i.h"
19#include "debugfs_key.h"
20#include "aes_ccm.h"
21
Johannes Berg11a843b2007-08-28 17:01:55 -040022
Johannes Bergdbbea672008-02-26 14:34:06 +010023/**
24 * DOC: Key handling basics
Johannes Berg11a843b2007-08-28 17:01:55 -040025 *
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 *
Johannes Berg3b967662008-04-08 17:56:52 +020036 * All key operations are protected internally so you can call them at
37 * any time.
Johannes Bergdb4d1162008-02-25 16:27:45 +010038 *
Johannes Berg3b967662008-04-08 17:56:52 +020039 * 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.
Johannes Berg11a843b2007-08-28 17:01:55 -040047 */
48
49static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
50static const u8 zero_addr[ETH_ALEN];
51
Johannes Berg3b967662008-04-08 17:56:52 +020052/* key mutex: used to synchronise todo runners */
53static DEFINE_MUTEX(key_mutex);
54static DEFINE_SPINLOCK(todo_lock);
55static LIST_HEAD(todo_list);
56
57static void key_todo(struct work_struct *work)
58{
59 ieee80211_key_todo();
60}
61
62static DECLARE_WORK(todo_work, key_todo);
63
64/**
65 * add_todo - add todo item for a key
66 *
67 * @key: key to add to do item for
68 * @flag: todo flag(s)
69 */
70static void add_todo(struct ieee80211_key *key, u32 flag)
71{
72 if (!key)
73 return;
74
75 spin_lock(&todo_lock);
76 key->flags |= flag;
Johannes Berg245cbe72008-04-13 10:43:50 +020077 /*
78 * Remove again if already on the list so that we move it to the end.
79 */
80 if (!list_empty(&key->todo))
81 list_del(&key->todo);
82 list_add_tail(&key->todo, &todo_list);
Johannes Berg3b967662008-04-08 17:56:52 +020083 schedule_work(&todo_work);
84 spin_unlock(&todo_lock);
85}
86
87/**
88 * ieee80211_key_lock - lock the mac80211 key operation lock
89 *
90 * This locks the (global) mac80211 key operation lock, all
91 * key operations must be done under this lock.
92 */
93static void ieee80211_key_lock(void)
94{
95 mutex_lock(&key_mutex);
96}
97
98/**
99 * ieee80211_key_unlock - unlock the mac80211 key operation lock
100 */
101static void ieee80211_key_unlock(void)
102{
103 mutex_unlock(&key_mutex);
104}
105
106static void assert_key_lock(void)
107{
108 WARN_ON(!mutex_is_locked(&key_mutex));
109}
110
Johannes Berg11a843b2007-08-28 17:01:55 -0400111static const u8 *get_mac_for_key(struct ieee80211_key *key)
112{
113 const u8 *addr = bcast_addr;
114
115 /*
116 * If we're an AP we won't ever receive frames with a non-WEP
117 * group key so we tell the driver that by using the zero MAC
118 * address to indicate a transmit-only key.
119 */
120 if (key->conf.alg != ALG_WEP &&
Johannes Berg05c914f2008-09-11 00:01:58 +0200121 (key->sdata->vif.type == NL80211_IFTYPE_AP ||
122 key->sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
Johannes Berg11a843b2007-08-28 17:01:55 -0400123 addr = zero_addr;
124
125 if (key->sta)
Johannes Berg17741cd2008-09-11 00:02:02 +0200126 addr = key->sta->sta.addr;
Johannes Berg11a843b2007-08-28 17:01:55 -0400127
128 return addr;
129}
130
131static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
132{
133 const u8 *addr;
134 int ret;
135
Johannes Berg3b967662008-04-08 17:56:52 +0200136 assert_key_lock();
137 might_sleep();
138
Johannes Berg11a843b2007-08-28 17:01:55 -0400139 if (!key->local->ops->set_key)
140 return;
141
142 addr = get_mac_for_key(key);
143
144 ret = key->local->ops->set_key(local_to_hw(key->local), SET_KEY,
145 key->sdata->dev->dev_addr, addr,
146 &key->conf);
147
Johannes Berg3b967662008-04-08 17:56:52 +0200148 if (!ret) {
149 spin_lock(&todo_lock);
Johannes Berg11a843b2007-08-28 17:01:55 -0400150 key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
Johannes Berg3b967662008-04-08 17:56:52 +0200151 spin_unlock(&todo_lock);
152 }
Johannes Berg11a843b2007-08-28 17:01:55 -0400153
154 if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP)
155 printk(KERN_ERR "mac80211-%s: failed to set key "
Johannes Berg0c68ae262008-10-27 15:56:10 -0700156 "(%d, %pM) to hardware (%d)\n",
Johannes Berg11a843b2007-08-28 17:01:55 -0400157 wiphy_name(key->local->hw.wiphy),
Johannes Berg0c68ae262008-10-27 15:56:10 -0700158 key->conf.keyidx, addr, ret);
Johannes Berg11a843b2007-08-28 17:01:55 -0400159}
160
161static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key)
162{
163 const u8 *addr;
164 int ret;
165
Johannes Berg3b967662008-04-08 17:56:52 +0200166 assert_key_lock();
167 might_sleep();
168
Johannes Bergdb4d1162008-02-25 16:27:45 +0100169 if (!key || !key->local->ops->set_key)
Johannes Berg11a843b2007-08-28 17:01:55 -0400170 return;
171
Johannes Berg3b967662008-04-08 17:56:52 +0200172 spin_lock(&todo_lock);
173 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
174 spin_unlock(&todo_lock);
Johannes Berg11a843b2007-08-28 17:01:55 -0400175 return;
Johannes Berg3b967662008-04-08 17:56:52 +0200176 }
177 spin_unlock(&todo_lock);
Johannes Berg11a843b2007-08-28 17:01:55 -0400178
179 addr = get_mac_for_key(key);
180
181 ret = key->local->ops->set_key(local_to_hw(key->local), DISABLE_KEY,
182 key->sdata->dev->dev_addr, addr,
183 &key->conf);
184
185 if (ret)
186 printk(KERN_ERR "mac80211-%s: failed to remove key "
Johannes Berg0c68ae262008-10-27 15:56:10 -0700187 "(%d, %pM) from hardware (%d)\n",
Johannes Berg11a843b2007-08-28 17:01:55 -0400188 wiphy_name(key->local->hw.wiphy),
Johannes Berg0c68ae262008-10-27 15:56:10 -0700189 key->conf.keyidx, addr, ret);
Johannes Berg11a843b2007-08-28 17:01:55 -0400190
Johannes Berg3b967662008-04-08 17:56:52 +0200191 spin_lock(&todo_lock);
192 key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
193 spin_unlock(&todo_lock);
194}
195
196static 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
210void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx)
211{
212 unsigned long flags;
213
Johannes Bergb16bd152008-04-11 21:40:35 +0200214 spin_lock_irqsave(&sdata->local->key_lock, flags);
Johannes Berg3b967662008-04-08 17:56:52 +0200215 __ieee80211_set_default_key(sdata, idx);
Johannes Bergb16bd152008-04-11 21:40:35 +0200216 spin_unlock_irqrestore(&sdata->local->key_lock, flags);
Johannes Berg3b967662008-04-08 17:56:52 +0200217}
218
219
220static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
221 struct sta_info *sta,
222 struct ieee80211_key *old,
223 struct ieee80211_key *new)
224{
225 int idx, defkey;
226
227 if (new)
228 list_add(&new->list, &sdata->key_list);
229
230 if (sta) {
231 rcu_assign_pointer(sta->key, new);
232 } else {
233 WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
234
235 if (old)
236 idx = old->conf.keyidx;
237 else
238 idx = new->conf.keyidx;
239
240 defkey = old && sdata->default_key == old;
241
242 if (defkey && !new)
243 __ieee80211_set_default_key(sdata, -1);
244
245 rcu_assign_pointer(sdata->keys[idx], new);
246 if (defkey && new)
247 __ieee80211_set_default_key(sdata, new->conf.keyidx);
248 }
249
250 if (old) {
251 /*
252 * We'll use an empty list to indicate that the key
253 * has already been removed.
254 */
255 list_del_init(&old->list);
256 }
Johannes Berg11a843b2007-08-28 17:01:55 -0400257}
258
Johannes Bergdb4d1162008-02-25 16:27:45 +0100259struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
Johannes Berg11a843b2007-08-28 17:01:55 -0400260 int idx,
261 size_t key_len,
262 const u8 *key_data)
Johannes Berg1f5a7e42007-07-27 15:43:23 +0200263{
264 struct ieee80211_key *key;
265
Johannes Bergd4e46a32007-09-14 11:10:24 -0400266 BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS);
Johannes Berg11a843b2007-08-28 17:01:55 -0400267
268 key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
Johannes Berg1f5a7e42007-07-27 15:43:23 +0200269 if (!key)
270 return NULL;
Johannes Berg11a843b2007-08-28 17:01:55 -0400271
272 /*
273 * Default to software encryption; we'll later upload the
274 * key to the hardware if possible.
275 */
Johannes Berg11a843b2007-08-28 17:01:55 -0400276 key->conf.flags = 0;
277 key->flags = 0;
278
279 key->conf.alg = alg;
280 key->conf.keyidx = idx;
281 key->conf.keylen = key_len;
Felix Fietkau76708de2008-10-05 18:02:48 +0200282 switch (alg) {
283 case ALG_WEP:
284 key->conf.iv_len = WEP_IV_LEN;
285 key->conf.icv_len = WEP_ICV_LEN;
286 break;
287 case ALG_TKIP:
288 key->conf.iv_len = TKIP_IV_LEN;
289 key->conf.icv_len = TKIP_ICV_LEN;
290 break;
291 case ALG_CCMP:
292 key->conf.iv_len = CCMP_HDR_LEN;
293 key->conf.icv_len = CCMP_MIC_LEN;
294 break;
295 }
Johannes Berg11a843b2007-08-28 17:01:55 -0400296 memcpy(key->conf.key, key_data, key_len);
Johannes Berge48618292008-02-27 13:39:00 +0100297 INIT_LIST_HEAD(&key->list);
Johannes Berg3b967662008-04-08 17:56:52 +0200298 INIT_LIST_HEAD(&key->todo);
Johannes Berg11a843b2007-08-28 17:01:55 -0400299
Johannes Berg11a843b2007-08-28 17:01:55 -0400300 if (alg == ALG_CCMP) {
301 /*
302 * Initialize AES key state here as an optimization so that
303 * it does not need to be initialized for every packet.
304 */
305 key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
306 if (!key->u.ccmp.tfm) {
Johannes Berg3b967662008-04-08 17:56:52 +0200307 kfree(key);
Johannes Berg11a843b2007-08-28 17:01:55 -0400308 return NULL;
309 }
310 }
311
Johannes Bergdb4d1162008-02-25 16:27:45 +0100312 return key;
313}
Johannes Berg11a843b2007-08-28 17:01:55 -0400314
Johannes Bergdb4d1162008-02-25 16:27:45 +0100315void ieee80211_key_link(struct ieee80211_key *key,
316 struct ieee80211_sub_if_data *sdata,
317 struct sta_info *sta)
318{
319 struct ieee80211_key *old_key;
Johannes Berg3b967662008-04-08 17:56:52 +0200320 unsigned long flags;
Johannes Bergdb4d1162008-02-25 16:27:45 +0100321 int idx;
322
Johannes Bergdb4d1162008-02-25 16:27:45 +0100323 BUG_ON(!sdata);
324 BUG_ON(!key);
325
326 idx = key->conf.keyidx;
327 key->local = sdata->local;
328 key->sdata = sdata;
329 key->sta = sta;
330
Johannes Berg11a843b2007-08-28 17:01:55 -0400331 if (sta) {
Johannes Berg11a843b2007-08-28 17:01:55 -0400332 /*
333 * some hardware cannot handle TKIP with QoS, so
334 * we indicate whether QoS could be in use.
335 */
Johannes Berg07346f812008-05-03 01:02:02 +0200336 if (test_sta_flags(sta, WLAN_STA_WME))
Johannes Berg11a843b2007-08-28 17:01:55 -0400337 key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA;
Ivo van Doornc6adbd22008-04-17 21:11:18 +0200338
339 /*
340 * This key is for a specific sta interface,
341 * inform the driver that it should try to store
342 * this key as pairwise key.
343 */
344 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
Johannes Berg11a843b2007-08-28 17:01:55 -0400345 } else {
Johannes Berg05c914f2008-09-11 00:01:58 +0200346 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Johannes Berg11a843b2007-08-28 17:01:55 -0400347 struct sta_info *ap;
348
Johannes Berg3b967662008-04-08 17:56:52 +0200349 /*
350 * We're getting a sta pointer in,
351 * so must be under RCU read lock.
352 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100353
Johannes Berg11a843b2007-08-28 17:01:55 -0400354 /* same here, the AP could be using QoS */
355 ap = sta_info_get(key->local, key->sdata->u.sta.bssid);
356 if (ap) {
Johannes Berg07346f812008-05-03 01:02:02 +0200357 if (test_sta_flags(ap, WLAN_STA_WME))
Johannes Berg11a843b2007-08-28 17:01:55 -0400358 key->conf.flags |=
359 IEEE80211_KEY_FLAG_WMM_STA;
Johannes Berg11a843b2007-08-28 17:01:55 -0400360 }
361 }
Johannes Berg11a843b2007-08-28 17:01:55 -0400362 }
363
Johannes Bergb16bd152008-04-11 21:40:35 +0200364 spin_lock_irqsave(&sdata->local->key_lock, flags);
Johannes Berg3b967662008-04-08 17:56:52 +0200365
Johannes Bergd4e46a32007-09-14 11:10:24 -0400366 if (sta)
Johannes Bergdb4d1162008-02-25 16:27:45 +0100367 old_key = sta->key;
Johannes Bergd4e46a32007-09-14 11:10:24 -0400368 else
Johannes Bergdb4d1162008-02-25 16:27:45 +0100369 old_key = sdata->keys[idx];
370
371 __ieee80211_key_replace(sdata, sta, old_key, key);
Johannes Bergd4e46a32007-09-14 11:10:24 -0400372
Johannes Bergb16bd152008-04-11 21:40:35 +0200373 spin_unlock_irqrestore(&sdata->local->key_lock, flags);
Johannes Bergd4e46a32007-09-14 11:10:24 -0400374
Johannes Berg3b967662008-04-08 17:56:52 +0200375 /* free old key later */
376 add_todo(old_key, KEY_FLAG_TODO_DELETE);
377
378 add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS);
Johannes Berge48618292008-02-27 13:39:00 +0100379 if (netif_running(sdata->dev))
Johannes Berg3a245762008-04-09 16:45:37 +0200380 add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD);
381}
382
383static void __ieee80211_key_free(struct ieee80211_key *key)
384{
385 /*
386 * Replace key with nothingness if it was ever used.
387 */
388 if (key->sdata)
389 __ieee80211_key_replace(key->sdata, key->sta,
390 key, NULL);
391
392 add_todo(key, KEY_FLAG_TODO_DELETE);
Johannes Berg1f5a7e42007-07-27 15:43:23 +0200393}
394
Johannes Berg1f5a7e42007-07-27 15:43:23 +0200395void ieee80211_key_free(struct ieee80211_key *key)
396{
Johannes Berg3b967662008-04-08 17:56:52 +0200397 unsigned long flags;
Johannes Bergdb4d1162008-02-25 16:27:45 +0100398
Johannes Berg8f371712007-08-28 17:01:54 -0400399 if (!key)
400 return;
401
Emmanuel Grumbach00eb7fe2008-06-26 12:13:46 +0300402 if (!key->sdata) {
403 /* The key has not been linked yet, simply free it
404 * and don't Oops */
405 if (key->conf.alg == ALG_CCMP)
406 ieee80211_aes_key_free(key->u.ccmp.tfm);
407 kfree(key);
408 return;
409 }
410
Johannes Bergb16bd152008-04-11 21:40:35 +0200411 spin_lock_irqsave(&key->sdata->local->key_lock, flags);
Johannes Berg3a245762008-04-09 16:45:37 +0200412 __ieee80211_key_free(key);
Johannes Bergb16bd152008-04-11 21:40:35 +0200413 spin_unlock_irqrestore(&key->sdata->local->key_lock, flags);
Johannes Berg3a245762008-04-09 16:45:37 +0200414}
Johannes Berg11a843b2007-08-28 17:01:55 -0400415
Johannes Berg3a245762008-04-09 16:45:37 +0200416/*
417 * To be safe against concurrent manipulations of the list (which shouldn't
418 * actually happen) we need to hold the spinlock. But under the spinlock we
419 * can't actually do much, so we defer processing to the todo list. Then run
420 * the todo list to be sure the operation and possibly previously pending
421 * operations are completed.
422 */
423static void ieee80211_todo_for_each_key(struct ieee80211_sub_if_data *sdata,
424 u32 todo_flags)
425{
426 struct ieee80211_key *key;
427 unsigned long flags;
428
429 might_sleep();
430
Johannes Bergb16bd152008-04-11 21:40:35 +0200431 spin_lock_irqsave(&sdata->local->key_lock, flags);
Johannes Berg3a245762008-04-09 16:45:37 +0200432 list_for_each_entry(key, &sdata->key_list, list)
433 add_todo(key, todo_flags);
Johannes Bergb16bd152008-04-11 21:40:35 +0200434 spin_unlock_irqrestore(&sdata->local->key_lock, flags);
Johannes Berg3a245762008-04-09 16:45:37 +0200435
436 ieee80211_key_todo();
Johannes Berg3b967662008-04-08 17:56:52 +0200437}
438
439void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
440{
Johannes Berg3a245762008-04-09 16:45:37 +0200441 ASSERT_RTNL();
Johannes Berg3b967662008-04-08 17:56:52 +0200442
443 if (WARN_ON(!netif_running(sdata->dev)))
444 return;
445
Johannes Berg3a245762008-04-09 16:45:37 +0200446 ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_ADD);
Johannes Berg3b967662008-04-08 17:56:52 +0200447}
448
449void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata)
450{
Johannes Berg3a245762008-04-09 16:45:37 +0200451 ASSERT_RTNL();
Johannes Berg3b967662008-04-08 17:56:52 +0200452
Johannes Berg3a245762008-04-09 16:45:37 +0200453 ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_REMOVE);
Johannes Berg3b967662008-04-08 17:56:52 +0200454}
455
Johannes Berg3a245762008-04-09 16:45:37 +0200456static void __ieee80211_key_destroy(struct ieee80211_key *key)
Johannes Berg3b967662008-04-08 17:56:52 +0200457{
458 if (!key)
459 return;
460
461 ieee80211_key_disable_hw_accel(key);
462
Johannes Berg8f371712007-08-28 17:01:54 -0400463 if (key->conf.alg == ALG_CCMP)
464 ieee80211_aes_key_free(key->u.ccmp.tfm);
465 ieee80211_debugfs_key_remove(key);
Johannes Berg11a843b2007-08-28 17:01:55 -0400466
Johannes Berg8f371712007-08-28 17:01:54 -0400467 kfree(key);
Johannes Berg1f5a7e42007-07-27 15:43:23 +0200468}
Johannes Berg11a843b2007-08-28 17:01:55 -0400469
Johannes Berg3b967662008-04-08 17:56:52 +0200470static void __ieee80211_key_todo(void)
Johannes Berg11a843b2007-08-28 17:01:55 -0400471{
Johannes Berg3b967662008-04-08 17:56:52 +0200472 struct ieee80211_key *key;
473 bool work_done;
474 u32 todoflags;
Johannes Berg11a843b2007-08-28 17:01:55 -0400475
Johannes Berg3b967662008-04-08 17:56:52 +0200476 /*
477 * NB: sta_info_destroy relies on this!
478 */
479 synchronize_rcu();
Johannes Berg11a843b2007-08-28 17:01:55 -0400480
Johannes Berg3b967662008-04-08 17:56:52 +0200481 spin_lock(&todo_lock);
482 while (!list_empty(&todo_list)) {
483 key = list_first_entry(&todo_list, struct ieee80211_key, todo);
484 list_del_init(&key->todo);
485 todoflags = key->flags & (KEY_FLAG_TODO_ADD_DEBUGFS |
486 KEY_FLAG_TODO_DEFKEY |
Johannes Berg3a245762008-04-09 16:45:37 +0200487 KEY_FLAG_TODO_HWACCEL_ADD |
488 KEY_FLAG_TODO_HWACCEL_REMOVE |
Johannes Berg3b967662008-04-08 17:56:52 +0200489 KEY_FLAG_TODO_DELETE);
490 key->flags &= ~todoflags;
491 spin_unlock(&todo_lock);
Johannes Berg11a843b2007-08-28 17:01:55 -0400492
Johannes Berg3b967662008-04-08 17:56:52 +0200493 work_done = false;
Johannes Berg11a843b2007-08-28 17:01:55 -0400494
Johannes Berg3b967662008-04-08 17:56:52 +0200495 if (todoflags & KEY_FLAG_TODO_ADD_DEBUGFS) {
496 ieee80211_debugfs_key_add(key);
497 work_done = true;
498 }
499 if (todoflags & KEY_FLAG_TODO_DEFKEY) {
500 ieee80211_debugfs_key_remove_default(key->sdata);
501 ieee80211_debugfs_key_add_default(key->sdata);
502 work_done = true;
503 }
Johannes Berg3a245762008-04-09 16:45:37 +0200504 if (todoflags & KEY_FLAG_TODO_HWACCEL_ADD) {
Johannes Berg3b967662008-04-08 17:56:52 +0200505 ieee80211_key_enable_hw_accel(key);
506 work_done = true;
507 }
Johannes Berg3a245762008-04-09 16:45:37 +0200508 if (todoflags & KEY_FLAG_TODO_HWACCEL_REMOVE) {
509 ieee80211_key_disable_hw_accel(key);
510 work_done = true;
511 }
Johannes Berg3b967662008-04-08 17:56:52 +0200512 if (todoflags & KEY_FLAG_TODO_DELETE) {
Johannes Berg3a245762008-04-09 16:45:37 +0200513 __ieee80211_key_destroy(key);
Johannes Berg3b967662008-04-08 17:56:52 +0200514 work_done = true;
515 }
516
517 WARN_ON(!work_done);
518
519 spin_lock(&todo_lock);
Johannes Berg11a843b2007-08-28 17:01:55 -0400520 }
Johannes Berg3b967662008-04-08 17:56:52 +0200521 spin_unlock(&todo_lock);
522}
523
524void ieee80211_key_todo(void)
525{
526 ieee80211_key_lock();
527 __ieee80211_key_todo();
528 ieee80211_key_unlock();
Johannes Berg11a843b2007-08-28 17:01:55 -0400529}
530
531void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata)
532{
533 struct ieee80211_key *key, *tmp;
Johannes Berg3a245762008-04-09 16:45:37 +0200534 unsigned long flags;
Johannes Bergdb4d1162008-02-25 16:27:45 +0100535
Johannes Berg3b967662008-04-08 17:56:52 +0200536 ieee80211_key_lock();
537
538 ieee80211_debugfs_key_remove_default(sdata);
Johannes Berg11a843b2007-08-28 17:01:55 -0400539
Johannes Bergb16bd152008-04-11 21:40:35 +0200540 spin_lock_irqsave(&sdata->local->key_lock, flags);
Johannes Berg11a843b2007-08-28 17:01:55 -0400541 list_for_each_entry_safe(key, tmp, &sdata->key_list, list)
Johannes Berg3a245762008-04-09 16:45:37 +0200542 __ieee80211_key_free(key);
Johannes Bergb16bd152008-04-11 21:40:35 +0200543 spin_unlock_irqrestore(&sdata->local->key_lock, flags);
Johannes Berg11a843b2007-08-28 17:01:55 -0400544
Johannes Berg3b967662008-04-08 17:56:52 +0200545 __ieee80211_key_todo();
Johannes Berg11a843b2007-08-28 17:01:55 -0400546
Johannes Berg3b967662008-04-08 17:56:52 +0200547 ieee80211_key_unlock();
Johannes Berg11a843b2007-08-28 17:01:55 -0400548}