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 | * | |
3b96766f JB |
39 | * All key operations are protected internally so you can call them at |
40 | * any time. | |
db4d1169 | 41 | * |
3b96766f JB |
42 | * Within mac80211, key references are, just as STA structure references, |
43 | * protected by RCU. Note, however, that some things are unprotected, | |
44 | * namely the key->sta dereferences within the hardware acceleration | |
45 | * functions. This means that sta_info_destroy() must flush the key todo | |
46 | * list. | |
47 | * | |
48 | * All the direct key list manipulation functions must not sleep because | |
49 | * they can operate on STA info structs that are protected by RCU. | |
11a843b7 JB |
50 | */ |
51 | ||
52 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 53 | |
3b96766f JB |
54 | /* key mutex: used to synchronise todo runners */ |
55 | static DEFINE_MUTEX(key_mutex); | |
56 | static DEFINE_SPINLOCK(todo_lock); | |
57 | static LIST_HEAD(todo_list); | |
58 | ||
59 | static void key_todo(struct work_struct *work) | |
60 | { | |
61 | ieee80211_key_todo(); | |
62 | } | |
63 | ||
64 | static DECLARE_WORK(todo_work, key_todo); | |
65 | ||
66 | /** | |
67 | * add_todo - add todo item for a key | |
68 | * | |
69 | * @key: key to add to do item for | |
70 | * @flag: todo flag(s) | |
523d2f69 JB |
71 | * |
72 | * Must be called with IRQs or softirqs disabled. | |
3b96766f JB |
73 | */ |
74 | static void add_todo(struct ieee80211_key *key, u32 flag) | |
75 | { | |
76 | if (!key) | |
77 | return; | |
78 | ||
79 | spin_lock(&todo_lock); | |
80 | key->flags |= flag; | |
245cbe7a JB |
81 | /* |
82 | * Remove again if already on the list so that we move it to the end. | |
83 | */ | |
84 | if (!list_empty(&key->todo)) | |
85 | list_del(&key->todo); | |
86 | list_add_tail(&key->todo, &todo_list); | |
3b96766f JB |
87 | schedule_work(&todo_work); |
88 | spin_unlock(&todo_lock); | |
89 | } | |
90 | ||
91 | /** | |
92 | * ieee80211_key_lock - lock the mac80211 key operation lock | |
93 | * | |
94 | * This locks the (global) mac80211 key operation lock, all | |
95 | * key operations must be done under this lock. | |
96 | */ | |
97 | static void ieee80211_key_lock(void) | |
98 | { | |
99 | mutex_lock(&key_mutex); | |
100 | } | |
101 | ||
102 | /** | |
103 | * ieee80211_key_unlock - unlock the mac80211 key operation lock | |
104 | */ | |
105 | static void ieee80211_key_unlock(void) | |
106 | { | |
107 | mutex_unlock(&key_mutex); | |
108 | } | |
109 | ||
110 | static void assert_key_lock(void) | |
111 | { | |
112 | WARN_ON(!mutex_is_locked(&key_mutex)); | |
113 | } | |
114 | ||
dc822b5d | 115 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
11a843b7 | 116 | { |
11a843b7 | 117 | if (key->sta) |
dc822b5d | 118 | return &key->sta->sta; |
11a843b7 | 119 | |
dc822b5d | 120 | return NULL; |
11a843b7 JB |
121 | } |
122 | ||
123 | static void ieee80211_key_enable_hw_accel(struct ieee80211_key *key) | |
124 | { | |
dc822b5d JB |
125 | struct ieee80211_sub_if_data *sdata; |
126 | struct ieee80211_sta *sta; | |
11a843b7 JB |
127 | int ret; |
128 | ||
3b96766f JB |
129 | assert_key_lock(); |
130 | might_sleep(); | |
131 | ||
11a843b7 JB |
132 | if (!key->local->ops->set_key) |
133 | return; | |
134 | ||
dc822b5d JB |
135 | sta = get_sta_for_key(key); |
136 | ||
137 | sdata = key->sdata; | |
138 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
139 | sdata = container_of(sdata->bss, | |
140 | struct ieee80211_sub_if_data, | |
141 | u.ap); | |
11a843b7 | 142 | |
12375ef9 | 143 | ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf); |
11a843b7 | 144 | |
3b96766f | 145 | if (!ret) { |
523d2f69 | 146 | spin_lock_bh(&todo_lock); |
11a843b7 | 147 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
523d2f69 | 148 | spin_unlock_bh(&todo_lock); |
3b96766f | 149 | } |
11a843b7 JB |
150 | |
151 | if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP) | |
152 | printk(KERN_ERR "mac80211-%s: failed to set key " | |
0c68ae26 | 153 | "(%d, %pM) to hardware (%d)\n", |
11a843b7 | 154 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 155 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 JB |
156 | } |
157 | ||
158 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
159 | { | |
dc822b5d JB |
160 | struct ieee80211_sub_if_data *sdata; |
161 | struct ieee80211_sta *sta; | |
11a843b7 JB |
162 | int ret; |
163 | ||
3b96766f JB |
164 | assert_key_lock(); |
165 | might_sleep(); | |
166 | ||
db4d1169 | 167 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
168 | return; |
169 | ||
523d2f69 | 170 | spin_lock_bh(&todo_lock); |
3b96766f | 171 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) { |
523d2f69 | 172 | spin_unlock_bh(&todo_lock); |
11a843b7 | 173 | return; |
3b96766f | 174 | } |
523d2f69 | 175 | spin_unlock_bh(&todo_lock); |
11a843b7 | 176 | |
dc822b5d JB |
177 | sta = get_sta_for_key(key); |
178 | sdata = key->sdata; | |
179 | ||
180 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
181 | sdata = container_of(sdata->bss, | |
182 | struct ieee80211_sub_if_data, | |
183 | u.ap); | |
11a843b7 | 184 | |
12375ef9 | 185 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
24487981 | 186 | sta, &key->conf); |
11a843b7 JB |
187 | |
188 | if (ret) | |
189 | printk(KERN_ERR "mac80211-%s: failed to remove key " | |
0c68ae26 | 190 | "(%d, %pM) from hardware (%d)\n", |
11a843b7 | 191 | wiphy_name(key->local->hw.wiphy), |
dc822b5d | 192 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
11a843b7 | 193 | |
523d2f69 | 194 | spin_lock_bh(&todo_lock); |
3b96766f | 195 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
523d2f69 | 196 | spin_unlock_bh(&todo_lock); |
3b96766f JB |
197 | } |
198 | ||
199 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
200 | int idx) | |
201 | { | |
202 | struct ieee80211_key *key = NULL; | |
203 | ||
204 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) | |
205 | key = sdata->keys[idx]; | |
206 | ||
207 | rcu_assign_pointer(sdata->default_key, key); | |
208 | ||
209 | if (key) | |
210 | add_todo(key, KEY_FLAG_TODO_DEFKEY); | |
211 | } | |
212 | ||
213 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx) | |
214 | { | |
215 | unsigned long flags; | |
216 | ||
b16bd15c | 217 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 218 | __ieee80211_set_default_key(sdata, idx); |
b16bd15c | 219 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
220 | } |
221 | ||
3cfcf6ac JM |
222 | static void |
223 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
224 | { | |
225 | struct ieee80211_key *key = NULL; | |
226 | ||
227 | if (idx >= NUM_DEFAULT_KEYS && | |
228 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
229 | key = sdata->keys[idx]; | |
230 | ||
231 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
232 | ||
233 | if (key) | |
234 | add_todo(key, KEY_FLAG_TODO_DEFMGMTKEY); | |
235 | } | |
236 | ||
237 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
238 | int idx) | |
239 | { | |
240 | unsigned long flags; | |
241 | ||
242 | spin_lock_irqsave(&sdata->local->key_lock, flags); | |
243 | __ieee80211_set_default_mgmt_key(sdata, idx); | |
244 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); | |
245 | } | |
246 | ||
3b96766f JB |
247 | |
248 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, | |
249 | struct sta_info *sta, | |
250 | struct ieee80211_key *old, | |
251 | struct ieee80211_key *new) | |
252 | { | |
3cfcf6ac | 253 | int idx, defkey, defmgmtkey; |
3b96766f JB |
254 | |
255 | if (new) | |
256 | list_add(&new->list, &sdata->key_list); | |
257 | ||
258 | if (sta) { | |
259 | rcu_assign_pointer(sta->key, new); | |
260 | } else { | |
261 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); | |
262 | ||
263 | if (old) | |
264 | idx = old->conf.keyidx; | |
265 | else | |
266 | idx = new->conf.keyidx; | |
267 | ||
268 | defkey = old && sdata->default_key == old; | |
3cfcf6ac | 269 | defmgmtkey = old && sdata->default_mgmt_key == old; |
3b96766f JB |
270 | |
271 | if (defkey && !new) | |
272 | __ieee80211_set_default_key(sdata, -1); | |
3cfcf6ac JM |
273 | if (defmgmtkey && !new) |
274 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
275 | |
276 | rcu_assign_pointer(sdata->keys[idx], new); | |
277 | if (defkey && new) | |
278 | __ieee80211_set_default_key(sdata, new->conf.keyidx); | |
3cfcf6ac JM |
279 | if (defmgmtkey && new) |
280 | __ieee80211_set_default_mgmt_key(sdata, | |
281 | new->conf.keyidx); | |
3b96766f JB |
282 | } |
283 | ||
284 | if (old) { | |
285 | /* | |
286 | * We'll use an empty list to indicate that the key | |
287 | * has already been removed. | |
288 | */ | |
289 | list_del_init(&old->list); | |
290 | } | |
11a843b7 JB |
291 | } |
292 | ||
db4d1169 | 293 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
11a843b7 JB |
294 | int idx, |
295 | size_t key_len, | |
faa8fdc8 JM |
296 | const u8 *key_data, |
297 | size_t seq_len, const u8 *seq) | |
1f5a7e47 JB |
298 | { |
299 | struct ieee80211_key *key; | |
faa8fdc8 | 300 | int i, j; |
1f5a7e47 | 301 | |
3cfcf6ac | 302 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
11a843b7 JB |
303 | |
304 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 JB |
305 | if (!key) |
306 | return NULL; | |
11a843b7 JB |
307 | |
308 | /* | |
309 | * Default to software encryption; we'll later upload the | |
310 | * key to the hardware if possible. | |
311 | */ | |
11a843b7 JB |
312 | key->conf.flags = 0; |
313 | key->flags = 0; | |
314 | ||
315 | key->conf.alg = alg; | |
316 | key->conf.keyidx = idx; | |
317 | key->conf.keylen = key_len; | |
76708dee FF |
318 | switch (alg) { |
319 | case ALG_WEP: | |
320 | key->conf.iv_len = WEP_IV_LEN; | |
321 | key->conf.icv_len = WEP_ICV_LEN; | |
322 | break; | |
323 | case ALG_TKIP: | |
324 | key->conf.iv_len = TKIP_IV_LEN; | |
325 | key->conf.icv_len = TKIP_ICV_LEN; | |
9f26a952 | 326 | if (seq) { |
faa8fdc8 JM |
327 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { |
328 | key->u.tkip.rx[i].iv32 = | |
329 | get_unaligned_le32(&seq[2]); | |
330 | key->u.tkip.rx[i].iv16 = | |
331 | get_unaligned_le16(seq); | |
332 | } | |
333 | } | |
76708dee FF |
334 | break; |
335 | case ALG_CCMP: | |
336 | key->conf.iv_len = CCMP_HDR_LEN; | |
337 | key->conf.icv_len = CCMP_MIC_LEN; | |
9f26a952 | 338 | if (seq) { |
faa8fdc8 JM |
339 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
340 | for (j = 0; j < CCMP_PN_LEN; j++) | |
341 | key->u.ccmp.rx_pn[i][j] = | |
342 | seq[CCMP_PN_LEN - j - 1]; | |
343 | } | |
76708dee | 344 | break; |
3cfcf6ac JM |
345 | case ALG_AES_CMAC: |
346 | key->conf.iv_len = 0; | |
347 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
9f26a952 | 348 | if (seq) |
faa8fdc8 JM |
349 | for (j = 0; j < 6; j++) |
350 | key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1]; | |
3cfcf6ac | 351 | break; |
76708dee | 352 | } |
11a843b7 | 353 | memcpy(key->conf.key, key_data, key_len); |
e4861829 | 354 | INIT_LIST_HEAD(&key->list); |
3b96766f | 355 | INIT_LIST_HEAD(&key->todo); |
11a843b7 | 356 | |
11a843b7 JB |
357 | if (alg == ALG_CCMP) { |
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.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
363 | if (!key->u.ccmp.tfm) { | |
3b96766f | 364 | kfree(key); |
11a843b7 JB |
365 | return NULL; |
366 | } | |
367 | } | |
368 | ||
3cfcf6ac JM |
369 | if (alg == ALG_AES_CMAC) { |
370 | /* | |
371 | * Initialize AES key state here as an optimization so that | |
372 | * it does not need to be initialized for every packet. | |
373 | */ | |
374 | key->u.aes_cmac.tfm = | |
375 | ieee80211_aes_cmac_key_setup(key_data); | |
376 | if (!key->u.aes_cmac.tfm) { | |
377 | kfree(key); | |
378 | return NULL; | |
379 | } | |
380 | } | |
381 | ||
db4d1169 JB |
382 | return key; |
383 | } | |
11a843b7 | 384 | |
db4d1169 JB |
385 | void ieee80211_key_link(struct ieee80211_key *key, |
386 | struct ieee80211_sub_if_data *sdata, | |
387 | struct sta_info *sta) | |
388 | { | |
389 | struct ieee80211_key *old_key; | |
3b96766f | 390 | unsigned long flags; |
db4d1169 JB |
391 | int idx; |
392 | ||
db4d1169 JB |
393 | BUG_ON(!sdata); |
394 | BUG_ON(!key); | |
395 | ||
396 | idx = key->conf.keyidx; | |
397 | key->local = sdata->local; | |
398 | key->sdata = sdata; | |
399 | key->sta = sta; | |
400 | ||
11a843b7 | 401 | if (sta) { |
11a843b7 JB |
402 | /* |
403 | * some hardware cannot handle TKIP with QoS, so | |
404 | * we indicate whether QoS could be in use. | |
405 | */ | |
07346f81 | 406 | if (test_sta_flags(sta, WLAN_STA_WME)) |
11a843b7 | 407 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
c6adbd21 ID |
408 | |
409 | /* | |
410 | * This key is for a specific sta interface, | |
411 | * inform the driver that it should try to store | |
412 | * this key as pairwise key. | |
413 | */ | |
414 | key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE; | |
11a843b7 | 415 | } else { |
05c914fe | 416 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
11a843b7 JB |
417 | struct sta_info *ap; |
418 | ||
3b96766f JB |
419 | /* |
420 | * We're getting a sta pointer in, | |
421 | * so must be under RCU read lock. | |
422 | */ | |
d0709a65 | 423 | |
11a843b7 | 424 | /* same here, the AP could be using QoS */ |
abe60632 | 425 | ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid); |
11a843b7 | 426 | if (ap) { |
07346f81 | 427 | if (test_sta_flags(ap, WLAN_STA_WME)) |
11a843b7 JB |
428 | key->conf.flags |= |
429 | IEEE80211_KEY_FLAG_WMM_STA; | |
11a843b7 JB |
430 | } |
431 | } | |
11a843b7 JB |
432 | } |
433 | ||
b16bd15c | 434 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 435 | |
d4e46a3d | 436 | if (sta) |
db4d1169 | 437 | old_key = sta->key; |
d4e46a3d | 438 | else |
db4d1169 JB |
439 | old_key = sdata->keys[idx]; |
440 | ||
441 | __ieee80211_key_replace(sdata, sta, old_key, key); | |
d4e46a3d | 442 | |
3b96766f JB |
443 | /* free old key later */ |
444 | add_todo(old_key, KEY_FLAG_TODO_DELETE); | |
db4d1169 | 445 | |
3b96766f | 446 | add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS); |
9607e6b6 | 447 | if (ieee80211_sdata_running(sdata)) |
3a245766 | 448 | add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD); |
523d2f69 JB |
449 | |
450 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); | |
1f5a7e47 JB |
451 | } |
452 | ||
3a245766 | 453 | static void __ieee80211_key_free(struct ieee80211_key *key) |
1f5a7e47 | 454 | { |
3b96766f JB |
455 | /* |
456 | * Replace key with nothingness if it was ever used. | |
457 | */ | |
3a245766 | 458 | if (key->sdata) |
3b96766f JB |
459 | __ieee80211_key_replace(key->sdata, key->sta, |
460 | key, NULL); | |
11a843b7 | 461 | |
3b96766f JB |
462 | add_todo(key, KEY_FLAG_TODO_DELETE); |
463 | } | |
d4e46a3d | 464 | |
3a245766 | 465 | void ieee80211_key_free(struct ieee80211_key *key) |
3b96766f | 466 | { |
3a245766 | 467 | unsigned long flags; |
11a843b7 | 468 | |
3a245766 | 469 | if (!key) |
3b96766f JB |
470 | return; |
471 | ||
00eb7fe7 EG |
472 | if (!key->sdata) { |
473 | /* The key has not been linked yet, simply free it | |
474 | * and don't Oops */ | |
475 | if (key->conf.alg == ALG_CCMP) | |
476 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
477 | kfree(key); | |
478 | return; | |
479 | } | |
480 | ||
b16bd15c | 481 | spin_lock_irqsave(&key->sdata->local->key_lock, flags); |
3a245766 | 482 | __ieee80211_key_free(key); |
b16bd15c | 483 | spin_unlock_irqrestore(&key->sdata->local->key_lock, flags); |
3a245766 JB |
484 | } |
485 | ||
486 | /* | |
487 | * To be safe against concurrent manipulations of the list (which shouldn't | |
488 | * actually happen) we need to hold the spinlock. But under the spinlock we | |
489 | * can't actually do much, so we defer processing to the todo list. Then run | |
490 | * the todo list to be sure the operation and possibly previously pending | |
491 | * operations are completed. | |
492 | */ | |
493 | static void ieee80211_todo_for_each_key(struct ieee80211_sub_if_data *sdata, | |
494 | u32 todo_flags) | |
495 | { | |
496 | struct ieee80211_key *key; | |
497 | unsigned long flags; | |
3b96766f | 498 | |
3a245766 JB |
499 | might_sleep(); |
500 | ||
b16bd15c | 501 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 502 | list_for_each_entry(key, &sdata->key_list, list) |
3a245766 | 503 | add_todo(key, todo_flags); |
b16bd15c | 504 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f | 505 | |
3a245766 | 506 | ieee80211_key_todo(); |
1f5a7e47 | 507 | } |
11a843b7 | 508 | |
3a245766 | 509 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
11a843b7 | 510 | { |
3a245766 | 511 | ASSERT_RTNL(); |
11a843b7 | 512 | |
9607e6b6 | 513 | if (WARN_ON(!ieee80211_sdata_running(sdata))) |
3a245766 | 514 | return; |
11a843b7 | 515 | |
3a245766 JB |
516 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_ADD); |
517 | } | |
11a843b7 | 518 | |
3a245766 JB |
519 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
520 | { | |
521 | ASSERT_RTNL(); | |
11a843b7 | 522 | |
3a245766 | 523 | ieee80211_todo_for_each_key(sdata, KEY_FLAG_TODO_HWACCEL_REMOVE); |
11a843b7 JB |
524 | } |
525 | ||
3a245766 | 526 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
11a843b7 | 527 | { |
3b96766f JB |
528 | if (!key) |
529 | return; | |
db4d1169 | 530 | |
3b96766f | 531 | ieee80211_key_disable_hw_accel(key); |
11a843b7 | 532 | |
3b96766f JB |
533 | if (key->conf.alg == ALG_CCMP) |
534 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
3cfcf6ac JM |
535 | if (key->conf.alg == ALG_AES_CMAC) |
536 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); | |
3b96766f JB |
537 | ieee80211_debugfs_key_remove(key); |
538 | ||
539 | kfree(key); | |
11a843b7 JB |
540 | } |
541 | ||
3b96766f | 542 | static void __ieee80211_key_todo(void) |
11a843b7 JB |
543 | { |
544 | struct ieee80211_key *key; | |
3b96766f JB |
545 | bool work_done; |
546 | u32 todoflags; | |
11a843b7 | 547 | |
3b96766f JB |
548 | /* |
549 | * NB: sta_info_destroy relies on this! | |
550 | */ | |
551 | synchronize_rcu(); | |
552 | ||
523d2f69 | 553 | spin_lock_bh(&todo_lock); |
3b96766f JB |
554 | while (!list_empty(&todo_list)) { |
555 | key = list_first_entry(&todo_list, struct ieee80211_key, todo); | |
556 | list_del_init(&key->todo); | |
557 | todoflags = key->flags & (KEY_FLAG_TODO_ADD_DEBUGFS | | |
558 | KEY_FLAG_TODO_DEFKEY | | |
3cfcf6ac | 559 | KEY_FLAG_TODO_DEFMGMTKEY | |
3a245766 JB |
560 | KEY_FLAG_TODO_HWACCEL_ADD | |
561 | KEY_FLAG_TODO_HWACCEL_REMOVE | | |
3b96766f JB |
562 | KEY_FLAG_TODO_DELETE); |
563 | key->flags &= ~todoflags; | |
523d2f69 | 564 | spin_unlock_bh(&todo_lock); |
3b96766f JB |
565 | |
566 | work_done = false; | |
567 | ||
568 | if (todoflags & KEY_FLAG_TODO_ADD_DEBUGFS) { | |
569 | ieee80211_debugfs_key_add(key); | |
570 | work_done = true; | |
571 | } | |
572 | if (todoflags & KEY_FLAG_TODO_DEFKEY) { | |
573 | ieee80211_debugfs_key_remove_default(key->sdata); | |
574 | ieee80211_debugfs_key_add_default(key->sdata); | |
575 | work_done = true; | |
576 | } | |
3cfcf6ac JM |
577 | if (todoflags & KEY_FLAG_TODO_DEFMGMTKEY) { |
578 | ieee80211_debugfs_key_remove_mgmt_default(key->sdata); | |
579 | ieee80211_debugfs_key_add_mgmt_default(key->sdata); | |
580 | work_done = true; | |
581 | } | |
3a245766 | 582 | if (todoflags & KEY_FLAG_TODO_HWACCEL_ADD) { |
3b96766f JB |
583 | ieee80211_key_enable_hw_accel(key); |
584 | work_done = true; | |
585 | } | |
3a245766 JB |
586 | if (todoflags & KEY_FLAG_TODO_HWACCEL_REMOVE) { |
587 | ieee80211_key_disable_hw_accel(key); | |
588 | work_done = true; | |
589 | } | |
3b96766f | 590 | if (todoflags & KEY_FLAG_TODO_DELETE) { |
3a245766 | 591 | __ieee80211_key_destroy(key); |
3b96766f JB |
592 | work_done = true; |
593 | } | |
db4d1169 | 594 | |
3b96766f | 595 | WARN_ON(!work_done); |
11a843b7 | 596 | |
523d2f69 | 597 | spin_lock_bh(&todo_lock); |
3b96766f | 598 | } |
523d2f69 | 599 | spin_unlock_bh(&todo_lock); |
11a843b7 JB |
600 | } |
601 | ||
3b96766f | 602 | void ieee80211_key_todo(void) |
11a843b7 | 603 | { |
3b96766f JB |
604 | ieee80211_key_lock(); |
605 | __ieee80211_key_todo(); | |
606 | ieee80211_key_unlock(); | |
607 | } | |
11a843b7 | 608 | |
3b96766f JB |
609 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
610 | { | |
611 | struct ieee80211_key *key, *tmp; | |
3a245766 | 612 | unsigned long flags; |
db4d1169 | 613 | |
3b96766f JB |
614 | ieee80211_key_lock(); |
615 | ||
616 | ieee80211_debugfs_key_remove_default(sdata); | |
3cfcf6ac | 617 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f | 618 | |
b16bd15c | 619 | spin_lock_irqsave(&sdata->local->key_lock, flags); |
3b96766f | 620 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
3a245766 | 621 | __ieee80211_key_free(key); |
b16bd15c | 622 | spin_unlock_irqrestore(&sdata->local->key_lock, flags); |
3b96766f JB |
623 | |
624 | __ieee80211_key_todo(); | |
625 | ||
626 | ieee80211_key_unlock(); | |
11a843b7 | 627 | } |