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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> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
1f5a7e47 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
11a843b7 JB |
13 | #include <linux/if_ether.h> |
14 | #include <linux/etherdevice.h> | |
15 | #include <linux/list.h> | |
d4e46a3d | 16 | #include <linux/rcupdate.h> |
db4d1169 | 17 | #include <linux/rtnetlink.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
bc3b2d7f | 19 | #include <linux/export.h> |
1f5a7e47 | 20 | #include <net/mac80211.h> |
d26ad377 | 21 | #include <asm/unaligned.h> |
1f5a7e47 | 22 | #include "ieee80211_i.h" |
24487981 | 23 | #include "driver-ops.h" |
1f5a7e47 JB |
24 | #include "debugfs_key.h" |
25 | #include "aes_ccm.h" | |
3cfcf6ac | 26 | #include "aes_cmac.h" |
1f5a7e47 | 27 | |
11a843b7 | 28 | |
dbbea671 JB |
29 | /** |
30 | * DOC: Key handling basics | |
11a843b7 JB |
31 | * |
32 | * Key handling in mac80211 is done based on per-interface (sub_if_data) | |
33 | * keys and per-station keys. Since each station belongs to an interface, | |
34 | * each station key also belongs to that interface. | |
35 | * | |
b5c34f66 JB |
36 | * Hardware acceleration is done on a best-effort basis for algorithms |
37 | * that are implemented in software, for each key the hardware is asked | |
38 | * to enable that key for offloading but if it cannot do that the key is | |
39 | * simply kept for software encryption (unless it is for an algorithm | |
40 | * that isn't implemented in software). | |
41 | * There is currently no way of knowing whether a key is handled in SW | |
42 | * or HW except by looking into debugfs. | |
11a843b7 | 43 | * |
b5c34f66 JB |
44 | * All key management is internally protected by a mutex. Within all |
45 | * other parts of mac80211, key references are, just as STA structure | |
46 | * references, protected by RCU. Note, however, that some things are | |
47 | * unprotected, namely the key->sta dereferences within the hardware | |
48 | * acceleration functions. This means that sta_info_destroy() must | |
49 | * remove the key which waits for an RCU grace period. | |
11a843b7 JB |
50 | */ |
51 | ||
52 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
11a843b7 | 53 | |
ad0e2b5a | 54 | static void assert_key_lock(struct ieee80211_local *local) |
3b96766f | 55 | { |
46a5ebaf | 56 | lockdep_assert_held(&local->key_mtx); |
3b96766f JB |
57 | } |
58 | ||
3bff1865 YAP |
59 | static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata) |
60 | { | |
61 | /* | |
62 | * When this count is zero, SKB resizing for allocating tailroom | |
63 | * for IV or MMIC is skipped. But, this check has created two race | |
64 | * cases in xmit path while transiting from zero count to one: | |
65 | * | |
66 | * 1. SKB resize was skipped because no key was added but just before | |
67 | * the xmit key is added and SW encryption kicks off. | |
68 | * | |
69 | * 2. SKB resize was skipped because all the keys were hw planted but | |
70 | * just before xmit one of the key is deleted and SW encryption kicks | |
71 | * off. | |
72 | * | |
73 | * In both the above case SW encryption will find not enough space for | |
74 | * tailroom and exits with WARN_ON. (See WARN_ONs at wpa.c) | |
75 | * | |
76 | * Solution has been explained at | |
77 | * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net | |
78 | */ | |
79 | ||
80 | if (!sdata->crypto_tx_tailroom_needed_cnt++) { | |
81 | /* | |
82 | * Flush all XMIT packets currently using HW encryption or no | |
83 | * encryption at all if the count transition is from 0 -> 1. | |
84 | */ | |
85 | synchronize_net(); | |
86 | } | |
87 | } | |
88 | ||
3ffc2a90 | 89 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) |
11a843b7 | 90 | { |
dc822b5d | 91 | struct ieee80211_sub_if_data *sdata; |
89c91cae | 92 | struct sta_info *sta; |
11a843b7 JB |
93 | int ret; |
94 | ||
3b96766f JB |
95 | might_sleep(); |
96 | ||
4619194a JB |
97 | if (key->flags & KEY_FLAG_TAINTED) { |
98 | /* If we get here, it's during resume and the key is | |
99 | * tainted so shouldn't be used/programmed any more. | |
100 | * However, its flags may still indicate that it was | |
101 | * programmed into the device (since we're in resume) | |
102 | * so clear that flag now to avoid trying to remove | |
103 | * it again later. | |
104 | */ | |
105 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
27b3eb9c | 106 | return -EINVAL; |
4619194a | 107 | } |
27b3eb9c | 108 | |
e31b8213 | 109 | if (!key->local->ops->set_key) |
3ffc2a90 | 110 | goto out_unsupported; |
11a843b7 | 111 | |
ad0e2b5a JB |
112 | assert_key_lock(key->local); |
113 | ||
89c91cae | 114 | sta = key->sta; |
dc822b5d | 115 | |
e31b8213 JB |
116 | /* |
117 | * If this is a per-STA GTK, check if it | |
118 | * is supported; if not, return. | |
119 | */ | |
120 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) && | |
121 | !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)) | |
122 | goto out_unsupported; | |
123 | ||
89c91cae JB |
124 | if (sta && !sta->uploaded) |
125 | goto out_unsupported; | |
126 | ||
dc822b5d | 127 | sdata = key->sdata; |
18890d4b HS |
128 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
129 | /* | |
130 | * The driver doesn't know anything about VLAN interfaces. | |
131 | * Hence, don't send GTKs for VLAN interfaces to the driver. | |
132 | */ | |
133 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
134 | goto out_unsupported; | |
18890d4b | 135 | } |
11a843b7 | 136 | |
89c91cae JB |
137 | ret = drv_set_key(key->local, SET_KEY, sdata, |
138 | sta ? &sta->sta : NULL, &key->conf); | |
11a843b7 | 139 | |
e31b8213 | 140 | if (!ret) { |
11a843b7 | 141 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
3bff1865 | 142 | |
ca34e3b5 | 143 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) |
3bff1865 YAP |
144 | sdata->crypto_tx_tailroom_needed_cnt--; |
145 | ||
077a9154 AN |
146 | WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) && |
147 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)); | |
148 | ||
e31b8213 JB |
149 | return 0; |
150 | } | |
11a843b7 | 151 | |
e31b8213 | 152 | if (ret != -ENOSPC && ret != -EOPNOTSUPP) |
bdcbd8e0 | 153 | sdata_err(sdata, |
0fb9a9ec | 154 | "failed to set key (%d, %pM) to hardware (%d)\n", |
89c91cae JB |
155 | key->conf.keyidx, |
156 | sta ? sta->sta.addr : bcast_addr, ret); | |
3ffc2a90 | 157 | |
e31b8213 JB |
158 | out_unsupported: |
159 | switch (key->conf.cipher) { | |
160 | case WLAN_CIPHER_SUITE_WEP40: | |
161 | case WLAN_CIPHER_SUITE_WEP104: | |
162 | case WLAN_CIPHER_SUITE_TKIP: | |
163 | case WLAN_CIPHER_SUITE_CCMP: | |
164 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
165 | /* all of these we can do in software */ | |
166 | return 0; | |
167 | default: | |
168 | return -EINVAL; | |
3ffc2a90 | 169 | } |
11a843b7 JB |
170 | } |
171 | ||
172 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) | |
173 | { | |
dc822b5d | 174 | struct ieee80211_sub_if_data *sdata; |
89c91cae | 175 | struct sta_info *sta; |
11a843b7 JB |
176 | int ret; |
177 | ||
3b96766f JB |
178 | might_sleep(); |
179 | ||
db4d1169 | 180 | if (!key || !key->local->ops->set_key) |
11a843b7 JB |
181 | return; |
182 | ||
ad0e2b5a JB |
183 | assert_key_lock(key->local); |
184 | ||
185 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
11a843b7 JB |
186 | return; |
187 | ||
89c91cae | 188 | sta = key->sta; |
dc822b5d JB |
189 | sdata = key->sdata; |
190 | ||
ca34e3b5 | 191 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) |
3bff1865 YAP |
192 | increment_tailroom_need_count(sdata); |
193 | ||
12375ef9 | 194 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
89c91cae | 195 | sta ? &sta->sta : NULL, &key->conf); |
11a843b7 JB |
196 | |
197 | if (ret) | |
bdcbd8e0 | 198 | sdata_err(sdata, |
0fb9a9ec | 199 | "failed to remove key (%d, %pM) from hardware (%d)\n", |
89c91cae JB |
200 | key->conf.keyidx, |
201 | sta ? sta->sta.addr : bcast_addr, ret); | |
11a843b7 | 202 | |
3b96766f | 203 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
3b96766f JB |
204 | } |
205 | ||
206 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, | |
f7e0104c | 207 | int idx, bool uni, bool multi) |
3b96766f JB |
208 | { |
209 | struct ieee80211_key *key = NULL; | |
210 | ||
ad0e2b5a JB |
211 | assert_key_lock(sdata->local); |
212 | ||
3b96766f | 213 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) |
40b275b6 | 214 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3b96766f | 215 | |
de5fad81 | 216 | if (uni) { |
f7e0104c | 217 | rcu_assign_pointer(sdata->default_unicast_key, key); |
de5fad81 YD |
218 | drv_set_default_unicast_key(sdata->local, sdata, idx); |
219 | } | |
220 | ||
f7e0104c JB |
221 | if (multi) |
222 | rcu_assign_pointer(sdata->default_multicast_key, key); | |
3b96766f | 223 | |
f7e0104c | 224 | ieee80211_debugfs_key_update_default(sdata); |
3b96766f JB |
225 | } |
226 | ||
f7e0104c JB |
227 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
228 | bool uni, bool multi) | |
3b96766f | 229 | { |
ad0e2b5a | 230 | mutex_lock(&sdata->local->key_mtx); |
f7e0104c | 231 | __ieee80211_set_default_key(sdata, idx, uni, multi); |
ad0e2b5a | 232 | mutex_unlock(&sdata->local->key_mtx); |
3b96766f JB |
233 | } |
234 | ||
3cfcf6ac JM |
235 | static void |
236 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) | |
237 | { | |
238 | struct ieee80211_key *key = NULL; | |
239 | ||
ad0e2b5a JB |
240 | assert_key_lock(sdata->local); |
241 | ||
3cfcf6ac JM |
242 | if (idx >= NUM_DEFAULT_KEYS && |
243 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
40b275b6 | 244 | key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
3cfcf6ac JM |
245 | |
246 | rcu_assign_pointer(sdata->default_mgmt_key, key); | |
247 | ||
f7e0104c | 248 | ieee80211_debugfs_key_update_default(sdata); |
3cfcf6ac JM |
249 | } |
250 | ||
251 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, | |
252 | int idx) | |
253 | { | |
ad0e2b5a | 254 | mutex_lock(&sdata->local->key_mtx); |
3cfcf6ac | 255 | __ieee80211_set_default_mgmt_key(sdata, idx); |
ad0e2b5a | 256 | mutex_unlock(&sdata->local->key_mtx); |
3cfcf6ac JM |
257 | } |
258 | ||
3b96766f | 259 | |
3b8d9c29 JB |
260 | static void ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, |
261 | struct sta_info *sta, | |
262 | bool pairwise, | |
263 | struct ieee80211_key *old, | |
264 | struct ieee80211_key *new) | |
3b96766f | 265 | { |
f7e0104c JB |
266 | int idx; |
267 | bool defunikey, defmultikey, defmgmtkey; | |
3b96766f | 268 | |
5282c3ba JB |
269 | /* caller must provide at least one old/new */ |
270 | if (WARN_ON(!new && !old)) | |
271 | return; | |
272 | ||
3b96766f | 273 | if (new) |
f850e00f | 274 | list_add_tail(&new->list, &sdata->key_list); |
3b96766f | 275 | |
2475b1cc | 276 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); |
3b96766f | 277 | |
2475b1cc MS |
278 | if (old) |
279 | idx = old->conf.keyidx; | |
280 | else | |
281 | idx = new->conf.keyidx; | |
3b96766f | 282 | |
2475b1cc MS |
283 | if (sta) { |
284 | if (pairwise) { | |
285 | rcu_assign_pointer(sta->ptk[idx], new); | |
286 | sta->ptk_idx = idx; | |
287 | } else { | |
288 | rcu_assign_pointer(sta->gtk[idx], new); | |
289 | sta->gtk_idx = idx; | |
290 | } | |
291 | } else { | |
40b275b6 JB |
292 | defunikey = old && |
293 | old == key_mtx_dereference(sdata->local, | |
294 | sdata->default_unicast_key); | |
295 | defmultikey = old && | |
296 | old == key_mtx_dereference(sdata->local, | |
297 | sdata->default_multicast_key); | |
298 | defmgmtkey = old && | |
299 | old == key_mtx_dereference(sdata->local, | |
300 | sdata->default_mgmt_key); | |
3b96766f | 301 | |
f7e0104c JB |
302 | if (defunikey && !new) |
303 | __ieee80211_set_default_key(sdata, -1, true, false); | |
304 | if (defmultikey && !new) | |
305 | __ieee80211_set_default_key(sdata, -1, false, true); | |
3cfcf6ac JM |
306 | if (defmgmtkey && !new) |
307 | __ieee80211_set_default_mgmt_key(sdata, -1); | |
3b96766f JB |
308 | |
309 | rcu_assign_pointer(sdata->keys[idx], new); | |
f7e0104c JB |
310 | if (defunikey && new) |
311 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
312 | true, false); | |
313 | if (defmultikey && new) | |
314 | __ieee80211_set_default_key(sdata, new->conf.keyidx, | |
315 | false, true); | |
3cfcf6ac JM |
316 | if (defmgmtkey && new) |
317 | __ieee80211_set_default_mgmt_key(sdata, | |
318 | new->conf.keyidx); | |
3b96766f JB |
319 | } |
320 | ||
b5c34f66 JB |
321 | if (old) |
322 | list_del(&old->list); | |
11a843b7 JB |
323 | } |
324 | ||
2475b1cc MS |
325 | struct ieee80211_key * |
326 | ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, | |
327 | const u8 *key_data, | |
328 | size_t seq_len, const u8 *seq, | |
329 | const struct ieee80211_cipher_scheme *cs) | |
1f5a7e47 JB |
330 | { |
331 | struct ieee80211_key *key; | |
1ac62ba7 | 332 | int i, j, err; |
1f5a7e47 | 333 | |
8c5bb1fa JB |
334 | if (WARN_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)) |
335 | return ERR_PTR(-EINVAL); | |
11a843b7 JB |
336 | |
337 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); | |
1f5a7e47 | 338 | if (!key) |
1ac62ba7 | 339 | return ERR_PTR(-ENOMEM); |
11a843b7 JB |
340 | |
341 | /* | |
342 | * Default to software encryption; we'll later upload the | |
343 | * key to the hardware if possible. | |
344 | */ | |
11a843b7 JB |
345 | key->conf.flags = 0; |
346 | key->flags = 0; | |
347 | ||
97359d12 | 348 | key->conf.cipher = cipher; |
11a843b7 JB |
349 | key->conf.keyidx = idx; |
350 | key->conf.keylen = key_len; | |
97359d12 JB |
351 | switch (cipher) { |
352 | case WLAN_CIPHER_SUITE_WEP40: | |
353 | case WLAN_CIPHER_SUITE_WEP104: | |
4325f6ca JB |
354 | key->conf.iv_len = IEEE80211_WEP_IV_LEN; |
355 | key->conf.icv_len = IEEE80211_WEP_ICV_LEN; | |
76708dee | 356 | break; |
97359d12 | 357 | case WLAN_CIPHER_SUITE_TKIP: |
4325f6ca JB |
358 | key->conf.iv_len = IEEE80211_TKIP_IV_LEN; |
359 | key->conf.icv_len = IEEE80211_TKIP_ICV_LEN; | |
9f26a952 | 360 | if (seq) { |
5a306f58 | 361 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
faa8fdc8 JM |
362 | key->u.tkip.rx[i].iv32 = |
363 | get_unaligned_le32(&seq[2]); | |
364 | key->u.tkip.rx[i].iv16 = | |
365 | get_unaligned_le16(seq); | |
366 | } | |
367 | } | |
523b02ea | 368 | spin_lock_init(&key->u.tkip.txlock); |
76708dee | 369 | break; |
97359d12 | 370 | case WLAN_CIPHER_SUITE_CCMP: |
4325f6ca JB |
371 | key->conf.iv_len = IEEE80211_CCMP_HDR_LEN; |
372 | key->conf.icv_len = IEEE80211_CCMP_MIC_LEN; | |
9f26a952 | 373 | if (seq) { |
5a306f58 | 374 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) |
4325f6ca | 375 | for (j = 0; j < IEEE80211_CCMP_PN_LEN; j++) |
faa8fdc8 | 376 | key->u.ccmp.rx_pn[i][j] = |
4325f6ca | 377 | seq[IEEE80211_CCMP_PN_LEN - j - 1]; |
faa8fdc8 | 378 | } |
11a843b7 JB |
379 | /* |
380 | * Initialize AES key state here as an optimization so that | |
381 | * it does not need to be initialized for every packet. | |
382 | */ | |
383 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); | |
1ac62ba7 BH |
384 | if (IS_ERR(key->u.ccmp.tfm)) { |
385 | err = PTR_ERR(key->u.ccmp.tfm); | |
3b96766f | 386 | kfree(key); |
1f951a7f | 387 | return ERR_PTR(err); |
11a843b7 | 388 | } |
60ae0f20 JB |
389 | break; |
390 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
391 | key->conf.iv_len = 0; | |
392 | key->conf.icv_len = sizeof(struct ieee80211_mmie); | |
393 | if (seq) | |
4325f6ca | 394 | for (j = 0; j < IEEE80211_CMAC_PN_LEN; j++) |
0f927323 | 395 | key->u.aes_cmac.rx_pn[j] = |
4325f6ca | 396 | seq[IEEE80211_CMAC_PN_LEN - j - 1]; |
3cfcf6ac JM |
397 | /* |
398 | * Initialize AES key state here as an optimization so that | |
399 | * it does not need to be initialized for every packet. | |
400 | */ | |
401 | key->u.aes_cmac.tfm = | |
402 | ieee80211_aes_cmac_key_setup(key_data); | |
1ac62ba7 BH |
403 | if (IS_ERR(key->u.aes_cmac.tfm)) { |
404 | err = PTR_ERR(key->u.aes_cmac.tfm); | |
3cfcf6ac | 405 | kfree(key); |
1f951a7f | 406 | return ERR_PTR(err); |
3cfcf6ac | 407 | } |
60ae0f20 | 408 | break; |
2475b1cc MS |
409 | default: |
410 | if (cs) { | |
411 | size_t len = (seq_len > MAX_PN_LEN) ? | |
412 | MAX_PN_LEN : seq_len; | |
413 | ||
414 | key->conf.iv_len = cs->hdr_len; | |
415 | key->conf.icv_len = cs->mic_len; | |
416 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) | |
417 | for (j = 0; j < len; j++) | |
418 | key->u.gen.rx_pn[i][j] = | |
419 | seq[len - j - 1]; | |
420 | } | |
3cfcf6ac | 421 | } |
60ae0f20 JB |
422 | memcpy(key->conf.key, key_data, key_len); |
423 | INIT_LIST_HEAD(&key->list); | |
3cfcf6ac | 424 | |
db4d1169 JB |
425 | return key; |
426 | } | |
11a843b7 | 427 | |
79cf2dfa JB |
428 | static void ieee80211_key_free_common(struct ieee80211_key *key) |
429 | { | |
430 | if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP) | |
431 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
432 | if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC) | |
433 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); | |
29c3f9c3 | 434 | kzfree(key); |
79cf2dfa JB |
435 | } |
436 | ||
6d10e46b JB |
437 | static void __ieee80211_key_destroy(struct ieee80211_key *key, |
438 | bool delay_tailroom) | |
ad0e2b5a | 439 | { |
32162a4d JM |
440 | if (key->local) |
441 | ieee80211_key_disable_hw_accel(key); | |
ad0e2b5a | 442 | |
3bff1865 | 443 | if (key->local) { |
8d1f7ecd JB |
444 | struct ieee80211_sub_if_data *sdata = key->sdata; |
445 | ||
32162a4d | 446 | ieee80211_debugfs_key_remove(key); |
8d1f7ecd JB |
447 | |
448 | if (delay_tailroom) { | |
449 | /* see ieee80211_delayed_tailroom_dec */ | |
450 | sdata->crypto_tx_tailroom_pending_dec++; | |
451 | schedule_delayed_work(&sdata->dec_tailroom_needed_wk, | |
452 | HZ/2); | |
453 | } else { | |
454 | sdata->crypto_tx_tailroom_needed_cnt--; | |
455 | } | |
3bff1865 | 456 | } |
ad0e2b5a | 457 | |
79cf2dfa JB |
458 | ieee80211_key_free_common(key); |
459 | } | |
460 | ||
6d10e46b JB |
461 | static void ieee80211_key_destroy(struct ieee80211_key *key, |
462 | bool delay_tailroom) | |
463 | { | |
464 | if (!key) | |
465 | return; | |
466 | ||
467 | /* | |
468 | * Synchronize so the TX path can no longer be using | |
469 | * this key before we free/remove it. | |
470 | */ | |
471 | synchronize_net(); | |
472 | ||
473 | __ieee80211_key_destroy(key, delay_tailroom); | |
474 | } | |
475 | ||
79cf2dfa JB |
476 | void ieee80211_key_free_unused(struct ieee80211_key *key) |
477 | { | |
478 | WARN_ON(key->sdata || key->local); | |
479 | ieee80211_key_free_common(key); | |
ad0e2b5a JB |
480 | } |
481 | ||
3ffc2a90 JB |
482 | int ieee80211_key_link(struct ieee80211_key *key, |
483 | struct ieee80211_sub_if_data *sdata, | |
484 | struct sta_info *sta) | |
db4d1169 | 485 | { |
27b3eb9c | 486 | struct ieee80211_local *local = sdata->local; |
db4d1169 | 487 | struct ieee80211_key *old_key; |
3ffc2a90 | 488 | int idx, ret; |
67aa030c | 489 | bool pairwise; |
db4d1169 | 490 | |
67aa030c | 491 | pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; |
db4d1169 JB |
492 | idx = key->conf.keyidx; |
493 | key->local = sdata->local; | |
494 | key->sdata = sdata; | |
495 | key->sta = sta; | |
496 | ||
ad0e2b5a | 497 | mutex_lock(&sdata->local->key_mtx); |
3b96766f | 498 | |
e31b8213 | 499 | if (sta && pairwise) |
2475b1cc | 500 | old_key = key_mtx_dereference(sdata->local, sta->ptk[idx]); |
e31b8213 | 501 | else if (sta) |
40b275b6 | 502 | old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]); |
d4e46a3d | 503 | else |
40b275b6 | 504 | old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]); |
db4d1169 | 505 | |
3bff1865 YAP |
506 | increment_tailroom_need_count(sdata); |
507 | ||
3b8d9c29 JB |
508 | ieee80211_key_replace(sdata, sta, pairwise, old_key, key); |
509 | ieee80211_key_destroy(old_key, true); | |
d4e46a3d | 510 | |
ad0e2b5a | 511 | ieee80211_debugfs_key_add(key); |
db4d1169 | 512 | |
27b3eb9c JB |
513 | if (!local->wowlan) { |
514 | ret = ieee80211_key_enable_hw_accel(key); | |
515 | if (ret) | |
516 | ieee80211_key_free(key, true); | |
517 | } else { | |
518 | ret = 0; | |
519 | } | |
79cf2dfa | 520 | |
ad0e2b5a | 521 | mutex_unlock(&sdata->local->key_mtx); |
3ffc2a90 JB |
522 | |
523 | return ret; | |
1f5a7e47 JB |
524 | } |
525 | ||
3b8d9c29 | 526 | void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom) |
1f5a7e47 | 527 | { |
5c0c3641 JB |
528 | if (!key) |
529 | return; | |
530 | ||
3b96766f JB |
531 | /* |
532 | * Replace key with nothingness if it was ever used. | |
533 | */ | |
3a245766 | 534 | if (key->sdata) |
3b8d9c29 | 535 | ieee80211_key_replace(key->sdata, key->sta, |
e31b8213 JB |
536 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, |
537 | key, NULL); | |
3b8d9c29 | 538 | ieee80211_key_destroy(key, delay_tailroom); |
3b96766f | 539 | } |
d4e46a3d | 540 | |
ad0e2b5a | 541 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
3a245766 JB |
542 | { |
543 | struct ieee80211_key *key; | |
11a843b7 | 544 | |
3a245766 | 545 | ASSERT_RTNL(); |
11a843b7 | 546 | |
9607e6b6 | 547 | if (WARN_ON(!ieee80211_sdata_running(sdata))) |
3a245766 | 548 | return; |
11a843b7 | 549 | |
ad0e2b5a | 550 | mutex_lock(&sdata->local->key_mtx); |
11a843b7 | 551 | |
3bff1865 YAP |
552 | sdata->crypto_tx_tailroom_needed_cnt = 0; |
553 | ||
554 | list_for_each_entry(key, &sdata->key_list, list) { | |
555 | increment_tailroom_need_count(sdata); | |
ad0e2b5a | 556 | ieee80211_key_enable_hw_accel(key); |
3bff1865 | 557 | } |
3b96766f | 558 | |
ad0e2b5a | 559 | mutex_unlock(&sdata->local->key_mtx); |
11a843b7 JB |
560 | } |
561 | ||
830af02f JB |
562 | void ieee80211_iter_keys(struct ieee80211_hw *hw, |
563 | struct ieee80211_vif *vif, | |
564 | void (*iter)(struct ieee80211_hw *hw, | |
565 | struct ieee80211_vif *vif, | |
566 | struct ieee80211_sta *sta, | |
567 | struct ieee80211_key_conf *key, | |
568 | void *data), | |
569 | void *iter_data) | |
570 | { | |
571 | struct ieee80211_local *local = hw_to_local(hw); | |
27b3eb9c | 572 | struct ieee80211_key *key, *tmp; |
830af02f JB |
573 | struct ieee80211_sub_if_data *sdata; |
574 | ||
575 | ASSERT_RTNL(); | |
576 | ||
577 | mutex_lock(&local->key_mtx); | |
578 | if (vif) { | |
579 | sdata = vif_to_sdata(vif); | |
27b3eb9c | 580 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
830af02f JB |
581 | iter(hw, &sdata->vif, |
582 | key->sta ? &key->sta->sta : NULL, | |
583 | &key->conf, iter_data); | |
584 | } else { | |
585 | list_for_each_entry(sdata, &local->interfaces, list) | |
27b3eb9c JB |
586 | list_for_each_entry_safe(key, tmp, |
587 | &sdata->key_list, list) | |
830af02f JB |
588 | iter(hw, &sdata->vif, |
589 | key->sta ? &key->sta->sta : NULL, | |
590 | &key->conf, iter_data); | |
591 | } | |
592 | mutex_unlock(&local->key_mtx); | |
593 | } | |
594 | EXPORT_SYMBOL(ieee80211_iter_keys); | |
595 | ||
7907c7d3 JB |
596 | static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata, |
597 | struct list_head *keys) | |
3b96766f JB |
598 | { |
599 | struct ieee80211_key *key, *tmp; | |
3b96766f | 600 | |
8d1f7ecd JB |
601 | sdata->crypto_tx_tailroom_needed_cnt -= |
602 | sdata->crypto_tx_tailroom_pending_dec; | |
603 | sdata->crypto_tx_tailroom_pending_dec = 0; | |
604 | ||
3cfcf6ac | 605 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
3b96766f | 606 | |
6d10e46b JB |
607 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) { |
608 | ieee80211_key_replace(key->sdata, key->sta, | |
609 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
610 | key, NULL); | |
7907c7d3 | 611 | list_add_tail(&key->list, keys); |
6d10e46b | 612 | } |
3b96766f | 613 | |
f7e0104c | 614 | ieee80211_debugfs_key_update_default(sdata); |
7907c7d3 | 615 | } |
f7e0104c | 616 | |
7907c7d3 JB |
617 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata, |
618 | bool force_synchronize) | |
619 | { | |
620 | struct ieee80211_local *local = sdata->local; | |
621 | struct ieee80211_sub_if_data *vlan; | |
622 | struct ieee80211_key *key, *tmp; | |
623 | LIST_HEAD(keys); | |
624 | ||
625 | cancel_delayed_work_sync(&sdata->dec_tailroom_needed_wk); | |
626 | ||
627 | mutex_lock(&local->key_mtx); | |
628 | ||
629 | ieee80211_free_keys_iface(sdata, &keys); | |
630 | ||
631 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
632 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
633 | ieee80211_free_keys_iface(vlan, &keys); | |
6d10e46b JB |
634 | } |
635 | ||
7907c7d3 JB |
636 | if (!list_empty(&keys) || force_synchronize) |
637 | synchronize_net(); | |
638 | list_for_each_entry_safe(key, tmp, &keys, list) | |
639 | __ieee80211_key_destroy(key, false); | |
640 | ||
8d1f7ecd JB |
641 | WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt || |
642 | sdata->crypto_tx_tailroom_pending_dec); | |
7907c7d3 JB |
643 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
644 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
645 | WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt || | |
646 | vlan->crypto_tx_tailroom_pending_dec); | |
647 | } | |
8d1f7ecd | 648 | |
7907c7d3 | 649 | mutex_unlock(&local->key_mtx); |
11a843b7 | 650 | } |
c68f4b89 | 651 | |
6d10e46b JB |
652 | void ieee80211_free_sta_keys(struct ieee80211_local *local, |
653 | struct sta_info *sta) | |
654 | { | |
c8782078 | 655 | struct ieee80211_key *key; |
6d10e46b JB |
656 | int i; |
657 | ||
658 | mutex_lock(&local->key_mtx); | |
659 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
660 | key = key_mtx_dereference(local, sta->gtk[i]); | |
661 | if (!key) | |
662 | continue; | |
663 | ieee80211_key_replace(key->sdata, key->sta, | |
664 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
665 | key, NULL); | |
c8782078 | 666 | __ieee80211_key_destroy(key, true); |
6d10e46b JB |
667 | } |
668 | ||
2475b1cc MS |
669 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
670 | key = key_mtx_dereference(local, sta->ptk[i]); | |
671 | if (!key) | |
672 | continue; | |
6d10e46b JB |
673 | ieee80211_key_replace(key->sdata, key->sta, |
674 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, | |
675 | key, NULL); | |
6d10e46b | 676 | __ieee80211_key_destroy(key, true); |
c8782078 | 677 | } |
6d10e46b JB |
678 | |
679 | mutex_unlock(&local->key_mtx); | |
680 | } | |
681 | ||
8d1f7ecd JB |
682 | void ieee80211_delayed_tailroom_dec(struct work_struct *wk) |
683 | { | |
684 | struct ieee80211_sub_if_data *sdata; | |
685 | ||
686 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
687 | dec_tailroom_needed_wk.work); | |
688 | ||
689 | /* | |
690 | * The reason for the delayed tailroom needed decrementing is to | |
691 | * make roaming faster: during roaming, all keys are first deleted | |
692 | * and then new keys are installed. The first new key causes the | |
693 | * crypto_tx_tailroom_needed_cnt to go from 0 to 1, which invokes | |
694 | * the cost of synchronize_net() (which can be slow). Avoid this | |
695 | * by deferring the crypto_tx_tailroom_needed_cnt decrementing on | |
696 | * key removal for a while, so if we roam the value is larger than | |
697 | * zero and no 0->1 transition happens. | |
698 | * | |
699 | * The cost is that if the AP switching was from an AP with keys | |
700 | * to one without, we still allocate tailroom while it would no | |
701 | * longer be needed. However, in the typical (fast) roaming case | |
702 | * within an ESS this usually won't happen. | |
703 | */ | |
704 | ||
705 | mutex_lock(&sdata->local->key_mtx); | |
706 | sdata->crypto_tx_tailroom_needed_cnt -= | |
707 | sdata->crypto_tx_tailroom_pending_dec; | |
708 | sdata->crypto_tx_tailroom_pending_dec = 0; | |
709 | mutex_unlock(&sdata->local->key_mtx); | |
710 | } | |
c68f4b89 JB |
711 | |
712 | void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, | |
713 | const u8 *replay_ctr, gfp_t gfp) | |
714 | { | |
715 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
716 | ||
717 | trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr); | |
718 | ||
719 | cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp); | |
720 | } | |
721 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify); | |
3ea542d3 JB |
722 | |
723 | void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, | |
724 | struct ieee80211_key_seq *seq) | |
725 | { | |
726 | struct ieee80211_key *key; | |
727 | u64 pn64; | |
728 | ||
729 | if (WARN_ON(!(keyconf->flags & IEEE80211_KEY_FLAG_GENERATE_IV))) | |
730 | return; | |
731 | ||
732 | key = container_of(keyconf, struct ieee80211_key, conf); | |
733 | ||
734 | switch (key->conf.cipher) { | |
735 | case WLAN_CIPHER_SUITE_TKIP: | |
736 | seq->tkip.iv32 = key->u.tkip.tx.iv32; | |
737 | seq->tkip.iv16 = key->u.tkip.tx.iv16; | |
738 | break; | |
739 | case WLAN_CIPHER_SUITE_CCMP: | |
740 | pn64 = atomic64_read(&key->u.ccmp.tx_pn); | |
741 | seq->ccmp.pn[5] = pn64; | |
742 | seq->ccmp.pn[4] = pn64 >> 8; | |
743 | seq->ccmp.pn[3] = pn64 >> 16; | |
744 | seq->ccmp.pn[2] = pn64 >> 24; | |
745 | seq->ccmp.pn[1] = pn64 >> 32; | |
746 | seq->ccmp.pn[0] = pn64 >> 40; | |
747 | break; | |
748 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
749 | pn64 = atomic64_read(&key->u.aes_cmac.tx_pn); | |
750 | seq->ccmp.pn[5] = pn64; | |
751 | seq->ccmp.pn[4] = pn64 >> 8; | |
752 | seq->ccmp.pn[3] = pn64 >> 16; | |
753 | seq->ccmp.pn[2] = pn64 >> 24; | |
754 | seq->ccmp.pn[1] = pn64 >> 32; | |
755 | seq->ccmp.pn[0] = pn64 >> 40; | |
756 | break; | |
757 | default: | |
758 | WARN_ON(1); | |
759 | } | |
760 | } | |
761 | EXPORT_SYMBOL(ieee80211_get_key_tx_seq); | |
762 | ||
763 | void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, | |
764 | int tid, struct ieee80211_key_seq *seq) | |
765 | { | |
766 | struct ieee80211_key *key; | |
767 | const u8 *pn; | |
768 | ||
769 | key = container_of(keyconf, struct ieee80211_key, conf); | |
770 | ||
771 | switch (key->conf.cipher) { | |
772 | case WLAN_CIPHER_SUITE_TKIP: | |
5a306f58 | 773 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS)) |
3ea542d3 JB |
774 | return; |
775 | seq->tkip.iv32 = key->u.tkip.rx[tid].iv32; | |
776 | seq->tkip.iv16 = key->u.tkip.rx[tid].iv16; | |
777 | break; | |
778 | case WLAN_CIPHER_SUITE_CCMP: | |
5a306f58 | 779 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) |
3ea542d3 JB |
780 | return; |
781 | if (tid < 0) | |
5a306f58 | 782 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS]; |
3ea542d3 JB |
783 | else |
784 | pn = key->u.ccmp.rx_pn[tid]; | |
4325f6ca | 785 | memcpy(seq->ccmp.pn, pn, IEEE80211_CCMP_PN_LEN); |
3ea542d3 JB |
786 | break; |
787 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
788 | if (WARN_ON(tid != 0)) | |
789 | return; | |
790 | pn = key->u.aes_cmac.rx_pn; | |
4325f6ca | 791 | memcpy(seq->aes_cmac.pn, pn, IEEE80211_CMAC_PN_LEN); |
3ea542d3 JB |
792 | break; |
793 | } | |
794 | } | |
795 | EXPORT_SYMBOL(ieee80211_get_key_rx_seq); | |
27b3eb9c JB |
796 | |
797 | void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, | |
798 | struct ieee80211_key_seq *seq) | |
799 | { | |
800 | struct ieee80211_key *key; | |
801 | u64 pn64; | |
802 | ||
803 | key = container_of(keyconf, struct ieee80211_key, conf); | |
804 | ||
805 | switch (key->conf.cipher) { | |
806 | case WLAN_CIPHER_SUITE_TKIP: | |
807 | key->u.tkip.tx.iv32 = seq->tkip.iv32; | |
808 | key->u.tkip.tx.iv16 = seq->tkip.iv16; | |
809 | break; | |
810 | case WLAN_CIPHER_SUITE_CCMP: | |
811 | pn64 = (u64)seq->ccmp.pn[5] | | |
812 | ((u64)seq->ccmp.pn[4] << 8) | | |
813 | ((u64)seq->ccmp.pn[3] << 16) | | |
814 | ((u64)seq->ccmp.pn[2] << 24) | | |
815 | ((u64)seq->ccmp.pn[1] << 32) | | |
816 | ((u64)seq->ccmp.pn[0] << 40); | |
817 | atomic64_set(&key->u.ccmp.tx_pn, pn64); | |
818 | break; | |
819 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
820 | pn64 = (u64)seq->aes_cmac.pn[5] | | |
821 | ((u64)seq->aes_cmac.pn[4] << 8) | | |
822 | ((u64)seq->aes_cmac.pn[3] << 16) | | |
823 | ((u64)seq->aes_cmac.pn[2] << 24) | | |
824 | ((u64)seq->aes_cmac.pn[1] << 32) | | |
825 | ((u64)seq->aes_cmac.pn[0] << 40); | |
826 | atomic64_set(&key->u.aes_cmac.tx_pn, pn64); | |
827 | break; | |
828 | default: | |
829 | WARN_ON(1); | |
830 | break; | |
831 | } | |
832 | } | |
833 | EXPORT_SYMBOL_GPL(ieee80211_set_key_tx_seq); | |
834 | ||
835 | void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, | |
836 | int tid, struct ieee80211_key_seq *seq) | |
837 | { | |
838 | struct ieee80211_key *key; | |
839 | u8 *pn; | |
840 | ||
841 | key = container_of(keyconf, struct ieee80211_key, conf); | |
842 | ||
843 | switch (key->conf.cipher) { | |
844 | case WLAN_CIPHER_SUITE_TKIP: | |
845 | if (WARN_ON(tid < 0 || tid >= IEEE80211_NUM_TIDS)) | |
846 | return; | |
847 | key->u.tkip.rx[tid].iv32 = seq->tkip.iv32; | |
848 | key->u.tkip.rx[tid].iv16 = seq->tkip.iv16; | |
849 | break; | |
850 | case WLAN_CIPHER_SUITE_CCMP: | |
851 | if (WARN_ON(tid < -1 || tid >= IEEE80211_NUM_TIDS)) | |
852 | return; | |
853 | if (tid < 0) | |
854 | pn = key->u.ccmp.rx_pn[IEEE80211_NUM_TIDS]; | |
855 | else | |
856 | pn = key->u.ccmp.rx_pn[tid]; | |
857 | memcpy(pn, seq->ccmp.pn, IEEE80211_CCMP_PN_LEN); | |
858 | break; | |
859 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
860 | if (WARN_ON(tid != 0)) | |
861 | return; | |
862 | pn = key->u.aes_cmac.rx_pn; | |
863 | memcpy(pn, seq->aes_cmac.pn, IEEE80211_CMAC_PN_LEN); | |
864 | break; | |
865 | default: | |
866 | WARN_ON(1); | |
867 | break; | |
868 | } | |
869 | } | |
870 | EXPORT_SYMBOL_GPL(ieee80211_set_key_rx_seq); | |
871 | ||
872 | void ieee80211_remove_key(struct ieee80211_key_conf *keyconf) | |
873 | { | |
874 | struct ieee80211_key *key; | |
875 | ||
876 | key = container_of(keyconf, struct ieee80211_key, conf); | |
877 | ||
878 | assert_key_lock(key->local); | |
879 | ||
880 | /* | |
881 | * if key was uploaded, we assume the driver will/has remove(d) | |
882 | * it, so adjust bookkeeping accordingly | |
883 | */ | |
884 | if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) { | |
885 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; | |
886 | ||
ca34e3b5 | 887 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC)) |
27b3eb9c JB |
888 | increment_tailroom_need_count(key->sdata); |
889 | } | |
890 | ||
891 | ieee80211_key_free(key, false); | |
892 | } | |
893 | EXPORT_SYMBOL_GPL(ieee80211_remove_key); | |
894 | ||
895 | struct ieee80211_key_conf * | |
896 | ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, | |
897 | struct ieee80211_key_conf *keyconf) | |
898 | { | |
899 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
900 | struct ieee80211_local *local = sdata->local; | |
901 | struct ieee80211_key *key; | |
902 | int err; | |
903 | ||
904 | if (WARN_ON(!local->wowlan)) | |
905 | return ERR_PTR(-EINVAL); | |
906 | ||
907 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
908 | return ERR_PTR(-EINVAL); | |
909 | ||
910 | key = ieee80211_key_alloc(keyconf->cipher, keyconf->keyidx, | |
911 | keyconf->keylen, keyconf->key, | |
2475b1cc | 912 | 0, NULL, NULL); |
27b3eb9c | 913 | if (IS_ERR(key)) |
c5dc164d | 914 | return ERR_CAST(key); |
27b3eb9c JB |
915 | |
916 | if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED) | |
917 | key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT; | |
918 | ||
919 | err = ieee80211_key_link(key, sdata, NULL); | |
920 | if (err) | |
921 | return ERR_PTR(err); | |
922 | ||
923 | return &key->conf; | |
924 | } | |
925 | EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_add); |