Commit | Line | Data |
---|---|---|
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> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
1f5a7e47 JB |
18 | #include <net/mac80211.h> |
19 | #include "ieee80211_i.h" | |
24487981 | 20 | #include "driver-ops.h" |
1f5a7e47 JB |
21 | #include "debugfs_key.h" |
22 | #include "aes_ccm.h" | |
3cfcf6ac | 23 | #include "aes_cmac.h" |
1f5a7e47 | 24 | |
11a843b7 | 25 | |
dbbea671 JB |
26 | /** |
27 | * DOC: Key handling basics | |
11a843b7 JB |
28 | * |
29 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
30 | * keys and per-station keys. Since each station belongs to an interface, | |
31 | * each station key also belongs to that interface. | |
32 | * | |
33 | * Hardware acceleration is done on a best-effort basis, for each key | |
34 | * that is eligible the hardware is asked to enable that key but if | |
35 | * it cannot do that they key is simply kept for software encryption. | |
36 | * There is currently no way of knowing this except by looking into | |
37 | * debugfs. | |
38 | * | |
ad0e2b5a | 39 | * All key operations are protected internally. |
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 | |
ad0e2b5a JB |
44 | * functions. This means that sta_info_destroy() must remove the key |
45 | * which waits for an RCU grace period. | |
11a843b7 JB |
46 | */ |
47 | ||
48 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 49 | |
ad0e2b5a | 50 | static void assert_key_lock(struct ieee80211_local *local) |
3b96766f | 51 | { |
46a5ebaf | 52 | lockdep_assert_held(&local->key_mtx); |
3b96766f JB |
53 | } |
54 | ||
dc822b5d | 55 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 56 | { |
11a843b7 | 57 | if (key->sta) |
dc822b5d | 58 | return &key->sta->sta; |
11a843b7 | 59 | |
dc822b5d | 60 | return NULL; |
11a843b7 JB |
61 | } |
62 | ||
3ffc2a90 | 63 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) |
11a843b7 | 64 | { |
dc822b5d JB |
65 | struct ieee80211_sub_if_data *sdata; |
66 | struct ieee80211_sta *sta; | |
11a843b7 JB |
67 | int ret; |
68 | ||
3b96766f JB |
69 | might_sleep(); |
70 | ||
e31b8213 | 71 | if (!key->local->ops->set_key) |
3ffc2a90 | 72 | goto out_unsupported; |
11a843b7 | 73 | |
ad0e2b5a JB |
74 | assert_key_lock(key->local); |
75 | ||
dc822b5d JB |
76 | sta = get_sta_for_key(key); |
77 | ||
e31b8213 JB |
78 | /* |
79 | * If this is a per-STA GTK, check if it | |
80 | * is supported; if not, return. | |
81 | */ | |
82 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) && | |
83 | !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)) | |
84 | goto out_unsupported; | |
85 | ||
dc822b5d | 86 | sdata = key->sdata; |
18890d4b HS |
87 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
88 | /* | |
89 | * The driver doesn't know anything about VLAN interfaces. | |
90 | * Hence, don't send GTKs for VLAN interfaces to the driver. | |
91 | */ | |
92 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
93 | goto out_unsupported; | |
dc822b5d JB |
94 | sdata = container_of(sdata->bss, |
95 | struct ieee80211_sub_if_data, | |
96 | u.ap); | |
18890d4b | 97 | } |
11a843b7 | 98 | |
12375ef9 | 99 | ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf); |
11a843b7 | 100 | |
e31b8213 | 101 | if (!ret) { |
11a843b7 | 102 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
e31b8213 JB |
103 | return 0; |
104 | } | |
11a843b7 | 105 | |
e31b8213 | 106 | if (ret != -ENOSPC && ret != -EOPNOTSUPP) |
0fb9a9ec JP |
107 | wiphy_err(key->local->hw.wiphy, |
108 | "failed to set key (%d, %pM) to hardware (%d)\n", | |
109 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); | |
3ffc2a90 | 110 | |
e31b8213 JB |
111 | out_unsupported: |
112 | switch (key->conf.cipher) { | |
113 | case WLAN_CIPHER_SUITE_WEP40: | |
114 | case WLAN_CIPHER_SUITE_WEP104: | |
115 | case WLAN_CIPHER_SUITE_TKIP: | |
116 | case WLAN_CIPHER_SUITE_CCMP: | |
117 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
118 | /* all of these we can do in software */ | |
119 | return 0; | |
120 | default: | |
121 | return -EINVAL; | |
3ffc2a90 | 122 | } |
11a843b7 JB |
123 | } |
124 | ||
125 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
126 | { | |
dc822b5d JB |
127 | struct ieee80211_sub_if_data *sdata; |
128 | struct ieee80211_sta *sta; | |
11a843b7 JB |
129 | int ret; |
130 | ||
3b96766f JB |
131 | might_sleep(); |
132 | ||
db4d1169 | 133 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
134 | return; |
135 | ||
ad0e2b5a JB |
136 | assert_key_lock(key->local); |
137 | ||
138 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
11a843b7 JB |
139 | return; |
140 | ||
dc822b5d JB |
141 | sta = get_sta_for_key(key); |
142 | sdata = key->sdata; | |
143 | ||
144 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
145 | sdata = container_of(sdata->bss, | |
146 | struct ieee80211_sub_if_data, | |
147 | u.ap); | |
11a843b7 | 148 | |
12375ef9 | 149 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
24487981 | 150 | sta, &key->conf); |
11a843b7 JB |
151 | |
152 | if (ret) | |
0fb9a9ec JP |
153 | wiphy_err(key->local->hw.wiphy, |
154 | "failed to remove key (%d, %pM) from hardware (%d)\n", | |
155 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); | |
11a843b7 | 156 | |
3b96766f | 157 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
3b96766f JB |
158 | } |
159 | ||
e31b8213 JB |
160 | void ieee80211_key_removed(struct ieee80211_key_conf *key_conf) |
161 | { | |
162 | struct ieee80211_key *key; | |
163 | ||
164 | key = container_of(key_conf, struct ieee80211_key, conf); | |
165 | ||
166 | might_sleep(); | |
167 | assert_key_lock(key->local); | |
168 | ||
169 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
170 | ||
171 | /* | |
172 | * Flush TX path to avoid attempts to use this key | |
173 | * after this function returns. Until then, drivers | |
174 | * must be prepared to handle the key. | |
175 | */ | |
176 | synchronize_rcu(); | |
177 | } | |
178 | EXPORT_SYMBOL_GPL(ieee80211_key_removed); | |
179 | ||
3b96766f | 180 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, |
f7e0104c | 181 | int idx, bool uni, bool multi) |
3b96766f JB |
182 | { |
183 | struct ieee80211_key *key = NULL; | |
184 | ||
ad0e2b5a JB |
185 | assert_key_lock(sdata->local); |
186 | ||
3b96766f JB |
187 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) |
188 | key = sdata->keys[idx]; | |
189 | ||
f7e0104c JB |
190 | if (uni) |
191 | rcu_assign_pointer(sdata->default_unicast_key, key); | |
192 | if (multi) | |
193 | rcu_assign_pointer(sdata->default_multicast_key, key); | |
3b96766f | 194 | |
f7e0104c | 195 | ieee80211_debugfs_key_update_default(sdata); |
3b96766f JB |
196 | } |
197 | ||
f7e0104c JB |
198 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
199 | bool uni, bool multi) | |
3b96766f | 200 | { |
ad0e2b5a | 201 | mutex_lock(&sdata->local->key_mtx); |
f7e0104c | 202 | __ieee80211_set_default_key(sdata, idx, uni, multi); |
ad0e2b5a | 203 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f JB |
204 | } |
205 | ||
3cfcf6ac JM |
206 | static void |
207 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
208 | { | |
209 | struct ieee80211_key *key = NULL; | |
210 | ||
ad0e2b5a JB |
211 | assert_key_lock(sdata->local); |
212 | ||
3cfcf6ac JM |
213 | if (idx >= NUM_DEFAULT_KEYS && |
214 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
215 | key = sdata->keys[idx]; | |
216 | ||
217 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
218 | ||
f7e0104c | 219 | ieee80211_debugfs_key_update_default(sdata); |
3cfcf6ac JM |
220 | } |
221 | ||
222 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
223 | int idx) | |
224 | { | |
ad0e2b5a | 225 | mutex_lock(&sdata->local->key_mtx); |
3cfcf6ac | 226 | __ieee80211_set_default_mgmt_key(sdata, idx); |
ad0e2b5a | 227 | mutex_unlock(&sdata->local->key_mtx); |
3cfcf6ac JM |
228 | } |
229 | ||
3b96766f JB |
230 | |
231 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
232 | struct sta_info *sta, | |
e31b8213 | 233 | bool pairwise, |
3b96766f JB |
234 | struct ieee80211_key *old, |
235 | struct ieee80211_key *new) | |
236 | { | |
f7e0104c JB |
237 | int idx; |
238 | bool defunikey, defmultikey, defmgmtkey; | |
3b96766f JB |
239 | |
240 | if (new) | |
241 | list_add(&new->list, &sdata->key_list); | |
242 | ||
e31b8213 JB |
243 | if (sta && pairwise) { |
244 | rcu_assign_pointer(sta->ptk, new); | |
245 | } else if (sta) { | |
246 | if (old) | |
247 | idx = old->conf.keyidx; | |
248 | else | |
249 | idx = new->conf.keyidx; | |
250 | rcu_assign_pointer(sta->gtk[idx], new); | |
3b96766f JB |
251 | } else { |
252 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
253 | ||
254 | if (old) | |
255 | idx = old->conf.keyidx; | |
256 | else | |
257 | idx = new->conf.keyidx; | |
258 | ||
f7e0104c JB |
259 | defunikey = old && sdata->default_unicast_key == old; |
260 | defmultikey = old && sdata->default_multicast_key == old; | |
3cfcf6ac | 261 | defmgmtkey = old && sdata->default_mgmt_key == old; |
3b96766f | 262 | |
f7e0104c JB |
263 | if (defunikey && !new) |
264 | __ieee80211_set_default_key(sdata, -1, true, false); | |
265 | if (defmultikey && !new) | |
266 | __ieee80211_set_default_key(sdata, -1, false, true); | |
3cfcf6ac JM |
267 | if (defmgmtkey && !new) |
268 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
269 | |
270 | rcu_assign_pointer(sdata->keys[idx], new); | |
f7e0104c JB |
271 | if (defunikey && new) |
272 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
273 | true, false); | |
274 | if (defmultikey && new) | |
275 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
276 | false, true); | |
3cfcf6ac JM |
277 | if (defmgmtkey && new) |
278 | __ieee80211_set_default_mgmt_key(sdata, | |
279 | new->conf.keyidx); | |
3b96766f JB |
280 | } |
281 | ||
282 | if (old) { | |
283 | /* | |
284 | * We'll use an empty list to indicate that the key | |
285 | * has already been removed. | |
286 | */ | |
287 | list_del_init(&old->list); | |
288 | } | |
11a843b7 JB |
289 | } |
290 | ||
97359d12 | 291 | struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, |
faa8fdc8 JM |
292 | const u8 *key_data, |
293 | size_t seq_len, const u8 *seq) | |
1f5a7e47 JB |
294 | { |
295 | struct ieee80211_key *key; | |
1ac62ba7 | 296 | int i, j, err; |
1f5a7e47 | 297 | |
3cfcf6ac | 298 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
11a843b7 JB |
299 | |
300 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 | 301 | if (!key) |
1ac62ba7 | 302 | return ERR_PTR(-ENOMEM); |
11a843b7 JB |
303 | |
304 | /* | |
305 | * Default to software encryption; we'll later upload the | |
306 | * key to the hardware if possible. | |
307 | */ | |
11a843b7 JB |
308 | key->conf.flags = 0; |
309 | key->flags = 0; | |
310 | ||
97359d12 | 311 | key->conf.cipher = cipher; |
11a843b7 JB |
312 | key->conf.keyidx = idx; |
313 | key->conf.keylen = key_len; | |
97359d12 JB |
314 | switch (cipher) { |
315 | case WLAN_CIPHER_SUITE_WEP40: | |
316 | case WLAN_CIPHER_SUITE_WEP104: | |
76708dee FF |
317 | key->conf.iv_len = WEP_IV_LEN; |
318 | key->conf.icv_len = WEP_ICV_LEN; | |
319 | break; | |
97359d12 | 320 | case WLAN_CIPHER_SUITE_TKIP: |
76708dee FF |
321 | key->conf.iv_len = TKIP_IV_LEN; |
322 | key->conf.icv_len = TKIP_ICV_LEN; | |
9f26a952 | 323 | if (seq) { |
faa8fdc8 JM |
324 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { |
325 | key->u.tkip.rx[i].iv32 = | |
326 | get_unaligned_le32(&seq[2]); | |
327 | key->u.tkip.rx[i].iv16 = | |
328 | get_unaligned_le16(seq); | |
329 | } | |
330 | } | |
76708dee | 331 | break; |
97359d12 | 332 | case WLAN_CIPHER_SUITE_CCMP: |
76708dee FF |
333 | key->conf.iv_len = CCMP_HDR_LEN; |
334 | key->conf.icv_len = CCMP_MIC_LEN; | |
9f26a952 | 335 | if (seq) { |
9190252c | 336 | for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) |
faa8fdc8 JM |
337 | for (j = 0; j < CCMP_PN_LEN; j++) |
338 | key->u.ccmp.rx_pn[i][j] = | |
339 | seq[CCMP_PN_LEN - j - 1]; | |
340 | } | |
11a843b7 JB |
341 | /* |
342 | * Initialize AES key state here as an optimization so that | |
343 | * it does not need to be initialized for every packet. | |
344 | */ | |
345 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
1ac62ba7 BH |
346 | if (IS_ERR(key->u.ccmp.tfm)) { |
347 | err = PTR_ERR(key->u.ccmp.tfm); | |
3b96766f | 348 | kfree(key); |
1ac62ba7 | 349 | key = ERR_PTR(err); |
11a843b7 | 350 | } |
60ae0f20 JB |
351 | break; |
352 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
353 | key->conf.iv_len = 0; | |
354 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
355 | if (seq) | |
356 | for (j = 0; j < 6; j++) | |
357 | key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1]; | |
3cfcf6ac JM |
358 | /* |
359 | * Initialize AES key state here as an optimization so that | |
360 | * it does not need to be initialized for every packet. | |
361 | */ | |
362 | key->u.aes_cmac.tfm = | |
363 | ieee80211_aes_cmac_key_setup(key_data); | |
1ac62ba7 BH |
364 | if (IS_ERR(key->u.aes_cmac.tfm)) { |
365 | err = PTR_ERR(key->u.aes_cmac.tfm); | |
3cfcf6ac | 366 | kfree(key); |
1ac62ba7 | 367 | key = ERR_PTR(err); |
3cfcf6ac | 368 | } |
60ae0f20 | 369 | break; |
3cfcf6ac | 370 | } |
60ae0f20 JB |
371 | memcpy(key->conf.key, key_data, key_len); |
372 | INIT_LIST_HEAD(&key->list); | |
3cfcf6ac | 373 | |
db4d1169 JB |
374 | return key; |
375 | } | |
11a843b7 | 376 | |
ad0e2b5a JB |
377 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
378 | { | |
379 | if (!key) | |
380 | return; | |
381 | ||
32162a4d JM |
382 | if (key->local) |
383 | ieee80211_key_disable_hw_accel(key); | |
ad0e2b5a | 384 | |
97359d12 | 385 | if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP) |
ad0e2b5a | 386 | ieee80211_aes_key_free(key->u.ccmp.tfm); |
97359d12 | 387 | if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC) |
ad0e2b5a | 388 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); |
32162a4d JM |
389 | if (key->local) |
390 | ieee80211_debugfs_key_remove(key); | |
ad0e2b5a JB |
391 | |
392 | kfree(key); | |
393 | } | |
394 | ||
3ffc2a90 JB |
395 | int ieee80211_key_link(struct ieee80211_key *key, |
396 | struct ieee80211_sub_if_data *sdata, | |
397 | struct sta_info *sta) | |
db4d1169 JB |
398 | { |
399 | struct ieee80211_key *old_key; | |
3ffc2a90 | 400 | int idx, ret; |
e31b8213 | 401 | bool pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; |
db4d1169 | 402 | |
db4d1169 JB |
403 | BUG_ON(!sdata); |
404 | BUG_ON(!key); | |
405 | ||
406 | idx = key->conf.keyidx; | |
407 | key->local = sdata->local; | |
408 | key->sdata = sdata; | |
409 | key->sta = sta; | |
410 | ||
11a843b7 | 411 | if (sta) { |
11a843b7 JB |
412 | /* |
413 | * some hardware cannot handle TKIP with QoS, so | |
414 | * we indicate whether QoS could be in use. | |
415 | */ | |
07346f81 | 416 | if (test_sta_flags(sta, WLAN_STA_WME)) |
11a843b7 JB |
417 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
418 | } else { | |
05c914fe | 419 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
420 | struct sta_info *ap; |
421 | ||
3b96766f JB |
422 | /* |
423 | * We're getting a sta pointer in, | |
424 | * so must be under RCU read lock. | |
425 | */ | |
d0709a65 | 426 | |
11a843b7 | 427 | /* same here, the AP could be using QoS */ |
abe60632 | 428 | ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid); |
11a843b7 | 429 | if (ap) { |
07346f81 | 430 | if (test_sta_flags(ap, WLAN_STA_WME)) |
11a843b7 JB |
431 | key->conf.flags |= |
432 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
433 | } |
434 | } | |
11a843b7 JB |
435 | } |
436 | ||
ad0e2b5a | 437 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 438 | |
e31b8213 JB |
439 | if (sta && pairwise) |
440 | old_key = sta->ptk; | |
441 | else if (sta) | |
442 | old_key = sta->gtk[idx]; | |
d4e46a3d | 443 | else |
db4d1169 JB |
444 | old_key = sdata->keys[idx]; |
445 | ||
e31b8213 | 446 | __ieee80211_key_replace(sdata, sta, pairwise, old_key, key); |
ad0e2b5a | 447 | __ieee80211_key_destroy(old_key); |
d4e46a3d | 448 | |
ad0e2b5a | 449 | ieee80211_debugfs_key_add(key); |
db4d1169 | 450 | |
3ffc2a90 | 451 | ret = ieee80211_key_enable_hw_accel(key); |
523d2f69 | 452 | |
ad0e2b5a | 453 | mutex_unlock(&sdata->local->key_mtx); |
3ffc2a90 JB |
454 | |
455 | return ret; | |
1f5a7e47 JB |
456 | } |
457 | ||
3a245766 | 458 | static void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 459 | { |
3b96766f JB |
460 | /* |
461 | * Replace key with nothingness if it was ever used. | |
462 | */ | |
3a245766 | 463 | if (key->sdata) |
3b96766f | 464 | __ieee80211_key_replace(key->sdata, key->sta, |
e31b8213 JB |
465 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, |
466 | key, NULL); | |
ad0e2b5a | 467 | __ieee80211_key_destroy(key); |
3b96766f | 468 | } |
d4e46a3d | 469 | |
32162a4d JM |
470 | void ieee80211_key_free(struct ieee80211_local *local, |
471 | struct ieee80211_key *key) | |
3b96766f | 472 | { |
3a245766 | 473 | if (!key) |
3b96766f JB |
474 | return; |
475 | ||
ad0e2b5a | 476 | mutex_lock(&local->key_mtx); |
3a245766 | 477 | __ieee80211_key_free(key); |
ad0e2b5a | 478 | mutex_unlock(&local->key_mtx); |
3a245766 JB |
479 | } |
480 | ||
ad0e2b5a | 481 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
3a245766 JB |
482 | { |
483 | struct ieee80211_key *key; | |
11a843b7 | 484 | |
3a245766 | 485 | ASSERT_RTNL(); |
11a843b7 | 486 | |
9607e6b6 | 487 | if (WARN_ON(!ieee80211_sdata_running(sdata))) |
3a245766 | 488 | return; |
11a843b7 | 489 | |
ad0e2b5a | 490 | mutex_lock(&sdata->local->key_mtx); |
11a843b7 | 491 | |
ad0e2b5a JB |
492 | list_for_each_entry(key, &sdata->key_list, list) |
493 | ieee80211_key_enable_hw_accel(key); | |
3b96766f | 494 | |
ad0e2b5a | 495 | mutex_unlock(&sdata->local->key_mtx); |
11a843b7 JB |
496 | } |
497 | ||
ad0e2b5a | 498 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 JB |
499 | { |
500 | struct ieee80211_key *key; | |
501 | ||
ad0e2b5a | 502 | ASSERT_RTNL(); |
db4d1169 | 503 | |
ad0e2b5a | 504 | mutex_lock(&sdata->local->key_mtx); |
11a843b7 | 505 | |
ad0e2b5a JB |
506 | list_for_each_entry(key, &sdata->key_list, list) |
507 | ieee80211_key_disable_hw_accel(key); | |
11a843b7 | 508 | |
ad0e2b5a | 509 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f | 510 | } |
11a843b7 | 511 | |
3b96766f JB |
512 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
513 | { | |
514 | struct ieee80211_key *key, *tmp; | |
db4d1169 | 515 | |
ad0e2b5a | 516 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 517 | |
3cfcf6ac | 518 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f JB |
519 | |
520 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) | |
3a245766 | 521 | __ieee80211_key_free(key); |
3b96766f | 522 | |
f7e0104c JB |
523 | ieee80211_debugfs_key_update_default(sdata); |
524 | ||
ad0e2b5a | 525 | mutex_unlock(&sdata->local->key_mtx); |
11a843b7 | 526 | } |