Commit | Line | Data |
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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) | |
523d2f69 JB |
70 | * |
71 | * Must be called with IRQs or softirqs disabled. | |
3b96766f JB |
72 | */ |
73 | static void add_todo(struct ieee80211_key *key, u32 flag) | |
74 | { | |
75 | if (!key) | |
76 | return; | |
77 | ||
78 | spin_lock(&todo_lock); | |
79 | key->flags |= flag; | |
245cbe7a JB |
80 | /* |
81 | * Remove again if already on the list so that we move it to the end. | |
82 | */ | |
83 | if (!list_empty(&key->todo)) | |
84 | list_del(&key->todo); | |
85 | list_add_tail(&key->todo, &todo_list); | |
3b96766f JB |
86 | schedule_work(&todo_work); |
87 | spin_unlock(&todo_lock); | |
88 | } | |
89 | ||
90 | /** | |
91 | * ieee80211_key_lock - lock the mac80211 key operation lock | |
92 | * | |
93 | * This locks the (global) mac80211 key operation lock, all | |
94 | * key operations must be done under this lock. | |
95 | */ | |
96 | static void ieee80211_key_lock(void) | |
97 | { | |
98 | mutex_lock(&key_mutex); | |
99 | } | |
100 | ||
101 | /** | |
102 | * ieee80211_key_unlock - unlock the mac80211 key operation lock | |
103 | */ | |
104 | static void ieee80211_key_unlock(void) | |
105 | { | |
106 | mutex_unlock(&key_mutex); | |
107 | } | |
108 | ||
109 | static void assert_key_lock(void) | |
110 | { | |
111 | WARN_ON(!mutex_is_locked(&key_mutex)); | |
112 | } | |
113 | ||
dc822b5d | 114 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 115 | { |
11a843b7 | 116 | if (key->sta) |
dc822b5d | 117 | return &key->sta->sta; |
11a843b7 | 118 | |
dc822b5d | 119 | return NULL; |
11a843b7 JB |
120 | } |
121 | ||
122 | static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key) | |
123 | { | |
dc822b5d JB |
124 | struct ieee80211_sub_if_data *sdata; |
125 | struct ieee80211_sta *sta; | |
11a843b7 JB |
126 | int ret; |
127 | ||
3b96766f JB |
128 | assert_key_lock(); |
129 | might_sleep(); | |
130 | ||
11a843b7 JB |
131 | if (!key->local->ops->set_key) |
132 | return; | |
133 | ||
dc822b5d JB |
134 | sta = get_sta_for_key(key); |
135 | ||
136 | sdata = key->sdata; | |
137 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
138 | sdata = container_of(sdata->bss, | |
139 | struct ieee80211_sub_if_data, | |
140 | u.ap); | |
11a843b7 | 141 | |
24487981 | 142 | ret = drv_set_key(key->local, SET_KEY, &sdata->vif, sta, &key->conf); |
11a843b7 | 143 | |
3b96766f | 144 | if (!ret) { |
523d2f69 | 145 | spin_lock_bh(&todo_lock); |
11a843b7 | 146 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
523d2f69 | 147 | spin_unlock_bh(&todo_lock); |
3b96766f | 148 | } |
11a843b7 JB |
149 | |
150 | if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP) | |
151 | printk(KERN_ERR "mac80211-%s: failed to set key " | |
0c68ae26 | 152 | "(%d, %pM) to hardware (%d)\n", |
11a843b7 | 153 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 154 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 JB |
155 | } |
156 | ||
157 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
158 | { | |
dc822b5d JB |
159 | struct ieee80211_sub_if_data *sdata; |
160 | struct ieee80211_sta *sta; | |
11a843b7 JB |
161 | int ret; |
162 | ||
3b96766f JB |
163 | assert_key_lock(); |
164 | might_sleep(); | |
165 | ||
db4d1169 | 166 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
167 | return; |
168 | ||
523d2f69 | 169 | spin_lock_bh(&todo_lock); |
3b96766f | 170 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) { |
523d2f69 | 171 | spin_unlock_bh(&todo_lock); |
11a843b7 | 172 | return; |
3b96766f | 173 | } |
523d2f69 | 174 | spin_unlock_bh(&todo_lock); |
11a843b7 | 175 | |
dc822b5d JB |
176 | sta = get_sta_for_key(key); |
177 | sdata = key->sdata; | |
178 | ||
179 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
180 | sdata = container_of(sdata->bss, | |
181 | struct ieee80211_sub_if_data, | |
182 | u.ap); | |
11a843b7 | 183 | |
24487981 JB |
184 | ret = drv_set_key(key->local, DISABLE_KEY, &sdata->vif, |
185 | sta, &key->conf); | |
11a843b7 JB |
186 | |
187 | if (ret) | |
188 | printk(KERN_ERR "mac80211-%s: failed to remove key " | |
0c68ae26 | 189 | "(%d, %pM) from hardware (%d)\n", |
11a843b7 | 190 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 191 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 | 192 | |
523d2f69 | 193 | spin_lock_bh(&todo_lock); |
3b96766f | 194 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
523d2f69 | 195 | spin_unlock_bh(&todo_lock); |
3b96766f JB |
196 | } |
197 | ||
198 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
199 | int idx) | |
200 | { | |
201 | struct ieee80211_key *key = NULL; | |
202 | ||
203 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) | |
204 | key = sdata->keys[idx]; | |
205 | ||
206 | rcu_assign_pointer(sdata->default_key, key); | |
207 | ||
208 | if (key) | |
209 | add_todo(key, KEY_FLAG_TODO_DEFKEY); | |
210 | } | |
211 | ||
212 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx) | |
213 | { | |
214 | unsigned long flags; | |
215 | ||
b16bd15c | 216 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 217 | __ieee80211_set_default_key(sdata, idx); |
b16bd15c | 218 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
219 | } |
220 | ||
3cfcf6ac JM |
221 | static void |
222 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
223 | { | |
224 | struct ieee80211_key *key = NULL; | |
225 | ||
226 | if (idx >= NUM_DEFAULT_KEYS && | |
227 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
228 | key = sdata->keys[idx]; | |
229 | ||
230 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
231 | ||
232 | if (key) | |
233 | add_todo(key, KEY_FLAG_TODO_DEFMGMTKEY); | |
234 | } | |
235 | ||
236 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
237 | int idx) | |
238 | { | |
239 | unsigned long flags; | |
240 | ||
241 | spin_lock_irqsave(&sdata->local->key_lock, flags); | |
242 | __ieee80211_set_default_mgmt_key(sdata, idx); | |
243 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); | |
244 | } | |
245 | ||
3b96766f JB |
246 | |
247 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
248 | struct sta_info *sta, | |
249 | struct ieee80211_key *old, | |
250 | struct ieee80211_key *new) | |
251 | { | |
3cfcf6ac | 252 | int idx, defkey, defmgmtkey; |
3b96766f JB |
253 | |
254 | if (new) | |
255 | list_add(&new->list, &sdata->key_list); | |
256 | ||
257 | if (sta) { | |
258 | rcu_assign_pointer(sta->key, new); | |
259 | } else { | |
260 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
261 | ||
262 | if (old) | |
263 | idx = old->conf.keyidx; | |
264 | else | |
265 | idx = new->conf.keyidx; | |
266 | ||
267 | defkey = old && sdata->default_key == old; | |
3cfcf6ac | 268 | defmgmtkey = old && sdata->default_mgmt_key == old; |
3b96766f JB |
269 | |
270 | if (defkey && !new) | |
271 | __ieee80211_set_default_key(sdata, -1); | |
3cfcf6ac JM |
272 | if (defmgmtkey && !new) |
273 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
274 | |
275 | rcu_assign_pointer(sdata->keys[idx], new); | |
276 | if (defkey && new) | |
277 | __ieee80211_set_default_key(sdata, new->conf.keyidx); | |
3cfcf6ac JM |
278 | if (defmgmtkey && new) |
279 | __ieee80211_set_default_mgmt_key(sdata, | |
280 | new->conf.keyidx); | |
3b96766f JB |
281 | } |
282 | ||
283 | if (old) { | |
284 | /* | |
285 | * We'll use an empty list to indicate that the key | |
286 | * has already been removed. | |
287 | */ | |
288 | list_del_init(&old->list); | |
289 | } | |
11a843b7 JB |
290 | } |
291 | ||
db4d1169 | 292 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
11a843b7 JB |
293 | int idx, |
294 | size_t key_len, | |
faa8fdc8 JM |
295 | const u8 *key_data, |
296 | size_t seq_len, const u8 *seq) | |
1f5a7e47 JB |
297 | { |
298 | struct ieee80211_key *key; | |
faa8fdc8 | 299 | int i, j; |
1f5a7e47 | 300 | |
3cfcf6ac | 301 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
11a843b7 JB |
302 | |
303 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 JB |
304 | if (!key) |
305 | return NULL; | |
11a843b7 JB |
306 | |
307 | /* | |
308 | * Default to software encryption; we'll later upload the | |
309 | * key to the hardware if possible. | |
310 | */ | |
11a843b7 JB |
311 | key->conf.flags = 0; |
312 | key->flags = 0; | |
313 | ||
314 | key->conf.alg = alg; | |
315 | key->conf.keyidx = idx; | |
316 | key->conf.keylen = key_len; | |
76708dee FF |
317 | switch (alg) { |
318 | case ALG_WEP: | |
319 | key->conf.iv_len = WEP_IV_LEN; | |
320 | key->conf.icv_len = WEP_ICV_LEN; | |
321 | break; | |
322 | case ALG_TKIP: | |
323 | key->conf.iv_len = TKIP_IV_LEN; | |
324 | key->conf.icv_len = TKIP_ICV_LEN; | |
9f26a952 | 325 | if (seq) { |
faa8fdc8 JM |
326 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { |
327 | key->u.tkip.rx[i].iv32 = | |
328 | get_unaligned_le32(&seq[2]); | |
329 | key->u.tkip.rx[i].iv16 = | |
330 | get_unaligned_le16(seq); | |
331 | } | |
332 | } | |
76708dee FF |
333 | break; |
334 | case ALG_CCMP: | |
335 | key->conf.iv_len = CCMP_HDR_LEN; | |
336 | key->conf.icv_len = CCMP_MIC_LEN; | |
9f26a952 | 337 | if (seq) { |
faa8fdc8 JM |
338 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
339 | for (j = 0; j < CCMP_PN_LEN; j++) | |
340 | key->u.ccmp.rx_pn[i][j] = | |
341 | seq[CCMP_PN_LEN - j - 1]; | |
342 | } | |
76708dee | 343 | break; |
3cfcf6ac JM |
344 | case ALG_AES_CMAC: |
345 | key->conf.iv_len = 0; | |
346 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
9f26a952 | 347 | if (seq) |
faa8fdc8 JM |
348 | for (j = 0; j < 6; j++) |
349 | key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1]; | |
3cfcf6ac | 350 | break; |
76708dee | 351 | } |
11a843b7 | 352 | memcpy(key->conf.key, key_data, key_len); |
e4861829 | 353 | INIT_LIST_HEAD(&key->list); |
3b96766f | 354 | INIT_LIST_HEAD(&key->todo); |
11a843b7 | 355 | |
11a843b7 JB |
356 | if (alg == ALG_CCMP) { |
357 | /* | |
358 | * Initialize AES key state here as an optimization so that | |
359 | * it does not need to be initialized for every packet. | |
360 | */ | |
361 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
362 | if (!key->u.ccmp.tfm) { | |
3b96766f | 363 | kfree(key); |
11a843b7 JB |
364 | return NULL; |
365 | } | |
366 | } | |
367 | ||
3cfcf6ac JM |
368 | if (alg == ALG_AES_CMAC) { |
369 | /* | |
370 | * Initialize AES key state here as an optimization so that | |
371 | * it does not need to be initialized for every packet. | |
372 | */ | |
373 | key->u.aes_cmac.tfm = | |
374 | ieee80211_aes_cmac_key_setup(key_data); | |
375 | if (!key->u.aes_cmac.tfm) { | |
376 | kfree(key); | |
377 | return NULL; | |
378 | } | |
379 | } | |
380 | ||
db4d1169 JB |
381 | return key; |
382 | } | |
11a843b7 | 383 | |
db4d1169 JB |
384 | void ieee80211_key_link(struct ieee80211_key *key, |
385 | struct ieee80211_sub_if_data *sdata, | |
386 | struct sta_info *sta) | |
387 | { | |
388 | struct ieee80211_key *old_key; | |
3b96766f | 389 | unsigned long flags; |
db4d1169 JB |
390 | int idx; |
391 | ||
db4d1169 JB |
392 | BUG_ON(!sdata); |
393 | BUG_ON(!key); | |
394 | ||
395 | idx = key->conf.keyidx; | |
396 | key->local = sdata->local; | |
397 | key->sdata = sdata; | |
398 | key->sta = sta; | |
399 | ||
11a843b7 | 400 | if (sta) { |
11a843b7 JB |
401 | /* |
402 | * some hardware cannot handle TKIP with QoS, so | |
403 | * we indicate whether QoS could be in use. | |
404 | */ | |
07346f81 | 405 | if (test_sta_flags(sta, WLAN_STA_WME)) |
11a843b7 | 406 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
c6adbd21 ID |
407 | |
408 | /* | |
409 | * This key is for a specific sta interface, | |
410 | * inform the driver that it should try to store | |
411 | * this key as pairwise key. | |
412 | */ | |
413 | key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE; | |
11a843b7 | 414 | } else { |
05c914fe | 415 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
416 | struct sta_info *ap; |
417 | ||
3b96766f JB |
418 | /* |
419 | * We're getting a sta pointer in, | |
420 | * so must be under RCU read lock. | |
421 | */ | |
d0709a65 | 422 | |
11a843b7 | 423 | /* same here, the AP could be using QoS */ |
46900298 | 424 | ap = sta_info_get(key->local, key->sdata->u.mgd.bssid); |
11a843b7 | 425 | if (ap) { |
07346f81 | 426 | if (test_sta_flags(ap, WLAN_STA_WME)) |
11a843b7 JB |
427 | key->conf.flags |= |
428 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
429 | } |
430 | } | |
11a843b7 JB |
431 | } |
432 | ||
b16bd15c | 433 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 434 | |
d4e46a3d | 435 | if (sta) |
db4d1169 | 436 | old_key = sta->key; |
d4e46a3d | 437 | else |
db4d1169 JB |
438 | old_key = sdata->keys[idx]; |
439 | ||
440 | __ieee80211_key_replace(sdata, sta, old_key, key); | |
d4e46a3d | 441 | |
3b96766f JB |
442 | /* free old key later */ |
443 | add_todo(old_key, KEY_FLAG_TODO_DELETE); | |
db4d1169 | 444 | |
3b96766f | 445 | add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS); |
e4861829 | 446 | if (netif_running(sdata->dev)) |
3a245766 | 447 | add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD); |
523d2f69 JB |
448 | |
449 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); | |
1f5a7e47 JB |
450 | } |
451 | ||
3a245766 | 452 | static void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 453 | { |
3b96766f JB |
454 | /* |
455 | * Replace key with nothingness if it was ever used. | |
456 | */ | |
3a245766 | 457 | if (key->sdata) |
3b96766f JB |
458 | __ieee80211_key_replace(key->sdata, key->sta, |
459 | key, NULL); | |
11a843b7 | 460 | |
3b96766f JB |
461 | add_todo(key, KEY_FLAG_TODO_DELETE); |
462 | } | |
d4e46a3d | 463 | |
3a245766 | 464 | void ieee80211_key_free(struct ieee80211_key *key) |
3b96766f | 465 | { |
3a245766 | 466 | unsigned long flags; |
11a843b7 | 467 | |
3a245766 | 468 | if (!key) |
3b96766f JB |
469 | return; |
470 | ||
00eb7fe7 EG |
471 | if (!key->sdata) { |
472 | /* The key has not been linked yet, simply free it | |
473 | * and don't Oops */ | |
474 | if (key->conf.alg == ALG_CCMP) | |
475 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
476 | kfree(key); | |
477 | return; | |
478 | } | |
479 | ||
b16bd15c | 480 | spin_lock_irqsave(&key->sdata->local->key_lock, flags); |
3a245766 | 481 | __ieee80211_key_free(key); |
b16bd15c | 482 | spin_unlock_irqrestore(&key->sdata->local->key_lock, flags); |
3a245766 JB |
483 | } |
484 | ||
485 | /* | |
486 | * To be safe against concurrent manipulations of the list (which shouldn't | |
487 | * actually happen) we need to hold the spinlock. But under the spinlock we | |
488 | * can't actually do much, so we defer processing to the todo list. Then run | |
489 | * the todo list to be sure the operation and possibly previously pending | |
490 | * operations are completed. | |
491 | */ | |
492 | static void ieee80211_todo_for_each_key(struct ieee80211_sub_if_data *sdata, | |
493 | u32 todo_flags) | |
494 | { | |
495 | struct ieee80211_key *key; | |
496 | unsigned long flags; | |
3b96766f | 497 | |
3a245766 JB |
498 | might_sleep(); |
499 | ||
b16bd15c | 500 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 501 | list_for_each_entry(key, &sdata->key_list, list) |
3a245766 | 502 | add_todo(key, todo_flags); |
b16bd15c | 503 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f | 504 | |
3a245766 | 505 | ieee80211_key_todo(); |
1f5a7e47 | 506 | } |
11a843b7 | 507 | |
3a245766 | 508 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 | 509 | { |
3a245766 | 510 | ASSERT_RTNL(); |
11a843b7 | 511 | |
3a245766 JB |
512 | if (WARN_ON(!netif_running(sdata->dev))) |
513 | return; | |
11a843b7 | 514 | |
3a245766 JB |
515 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_ADD); |
516 | } | |
11a843b7 | 517 | |
3a245766 JB |
518 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
519 | { | |
520 | ASSERT_RTNL(); | |
11a843b7 | 521 | |
3a245766 | 522 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_REMOVE); |
11a843b7 JB |
523 | } |
524 | ||
3a245766 | 525 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
11a843b7 | 526 | { |
3b96766f JB |
527 | if (!key) |
528 | return; | |
db4d1169 | 529 | |
3b96766f | 530 | ieee80211_key_disable_hw_accel(key); |
11a843b7 | 531 | |
3b96766f JB |
532 | if (key->conf.alg == ALG_CCMP) |
533 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
3cfcf6ac JM |
534 | if (key->conf.alg == ALG_AES_CMAC) |
535 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); | |
3b96766f JB |
536 | ieee80211_debugfs_key_remove(key); |
537 | ||
538 | kfree(key); | |
11a843b7 JB |
539 | } |
540 | ||
3b96766f | 541 | static void __ieee80211_key_todo(void) |
11a843b7 JB |
542 | { |
543 | struct ieee80211_key *key; | |
3b96766f JB |
544 | bool work_done; |
545 | u32 todoflags; | |
11a843b7 | 546 | |
3b96766f JB |
547 | /* |
548 | * NB: sta_info_destroy relies on this! | |
549 | */ | |
550 | synchronize_rcu(); | |
551 | ||
523d2f69 | 552 | spin_lock_bh(&todo_lock); |
3b96766f JB |
553 | while (!list_empty(&todo_list)) { |
554 | key = list_first_entry(&todo_list, struct ieee80211_key, todo); | |
555 | list_del_init(&key->todo); | |
556 | todoflags = key->flags & (KEY_FLAG_TODO_ADD_DEBUGFS | | |
557 | KEY_FLAG_TODO_DEFKEY | | |
3cfcf6ac | 558 | KEY_FLAG_TODO_DEFMGMTKEY | |
3a245766 JB |
559 | KEY_FLAG_TODO_HWACCEL_ADD | |
560 | KEY_FLAG_TODO_HWACCEL_REMOVE | | |
3b96766f JB |
561 | KEY_FLAG_TODO_DELETE); |
562 | key->flags &= ~todoflags; | |
523d2f69 | 563 | spin_unlock_bh(&todo_lock); |
3b96766f JB |
564 | |
565 | work_done = false; | |
566 | ||
567 | if (todoflags & KEY_FLAG_TODO_ADD_DEBUGFS) { | |
568 | ieee80211_debugfs_key_add(key); | |
569 | work_done = true; | |
570 | } | |
571 | if (todoflags & KEY_FLAG_TODO_DEFKEY) { | |
572 | ieee80211_debugfs_key_remove_default(key->sdata); | |
573 | ieee80211_debugfs_key_add_default(key->sdata); | |
574 | work_done = true; | |
575 | } | |
3cfcf6ac JM |
576 | if (todoflags & KEY_FLAG_TODO_DEFMGMTKEY) { |
577 | ieee80211_debugfs_key_remove_mgmt_default(key->sdata); | |
578 | ieee80211_debugfs_key_add_mgmt_default(key->sdata); | |
579 | work_done = true; | |
580 | } | |
3a245766 | 581 | if (todoflags & KEY_FLAG_TODO_HWACCEL_ADD) { |
3b96766f JB |
582 | ieee80211_key_enable_hw_accel(key); |
583 | work_done = true; | |
584 | } | |
3a245766 JB |
585 | if (todoflags & KEY_FLAG_TODO_HWACCEL_REMOVE) { |
586 | ieee80211_key_disable_hw_accel(key); | |
587 | work_done = true; | |
588 | } | |
3b96766f | 589 | if (todoflags & KEY_FLAG_TODO_DELETE) { |
3a245766 | 590 | __ieee80211_key_destroy(key); |
3b96766f JB |
591 | work_done = true; |
592 | } | |
db4d1169 | 593 | |
3b96766f | 594 | WARN_ON(!work_done); |
11a843b7 | 595 | |
523d2f69 | 596 | spin_lock_bh(&todo_lock); |
3b96766f | 597 | } |
523d2f69 | 598 | spin_unlock_bh(&todo_lock); |
11a843b7 JB |
599 | } |
600 | ||
3b96766f | 601 | void ieee80211_key_todo(void) |
11a843b7 | 602 | { |
3b96766f JB |
603 | ieee80211_key_lock(); |
604 | __ieee80211_key_todo(); | |
605 | ieee80211_key_unlock(); | |
606 | } | |
11a843b7 | 607 | |
3b96766f JB |
608 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
609 | { | |
610 | struct ieee80211_key *key, *tmp; | |
3a245766 | 611 | unsigned long flags; |
db4d1169 | 612 | |
3b96766f JB |
613 | ieee80211_key_lock(); |
614 | ||
615 | ieee80211_debugfs_key_remove_default(sdata); | |
3cfcf6ac | 616 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f | 617 | |
b16bd15c | 618 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 619 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
3a245766 | 620 | __ieee80211_key_free(key); |
b16bd15c | 621 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
622 | |
623 | __ieee80211_key_todo(); | |
624 | ||
625 | ieee80211_key_unlock(); | |
11a843b7 | 626 | } |