Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/if_arp.h> | |
0d174406 | 17 | #include <linux/timer.h> |
d0709a65 | 18 | #include <linux/rtnetlink.h> |
f0706e82 JB |
19 | |
20 | #include <net/mac80211.h> | |
21 | #include "ieee80211_i.h" | |
24487981 | 22 | #include "driver-ops.h" |
2c8dccc7 | 23 | #include "rate.h" |
f0706e82 | 24 | #include "sta_info.h" |
e9f207f0 | 25 | #include "debugfs_sta.h" |
ee385855 | 26 | #include "mesh.h" |
ce662b44 | 27 | #include "wme.h" |
f0706e82 | 28 | |
d0709a65 JB |
29 | /** |
30 | * DOC: STA information lifetime rules | |
31 | * | |
32 | * STA info structures (&struct sta_info) are managed in a hash table | |
33 | * for faster lookup and a list for iteration. They are managed using | |
34 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
35 | * | |
34e89507 JB |
36 | * Upon allocating a STA info structure with sta_info_alloc(), the caller |
37 | * owns that structure. It must then insert it into the hash table using | |
38 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
39 | * case (which acquires an rcu read section but must not be called from | |
40 | * within one) will the pointer still be valid after the call. Note that | |
41 | * the caller may not do much with the STA info before inserting it, in | |
42 | * particular, it may not start any mesh peer link management or add | |
43 | * encryption keys. | |
93e5deb1 JB |
44 | * |
45 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
46 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 47 | * |
34e89507 | 48 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
49 | * peer. This means different things for the different type of interfaces |
50 | * we support. For a regular station this mean we add the AP sta when we | |
25985edc | 51 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 52 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 53 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 54 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 55 | * |
34e89507 JB |
56 | * In order to remove a STA info structure, various sta_info_destroy_*() |
57 | * calls are available. | |
d0709a65 | 58 | * |
34e89507 JB |
59 | * There is no concept of ownership on a STA entry, each structure is |
60 | * owned by the global hash table/list until it is removed. All users of | |
61 | * the structure need to be RCU protected so that the structure won't be | |
62 | * freed before they are done using it. | |
d0709a65 | 63 | */ |
f0706e82 | 64 | |
4d33960b | 65 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
66 | static int sta_info_hash_del(struct ieee80211_local *local, |
67 | struct sta_info *sta) | |
f0706e82 JB |
68 | { |
69 | struct sta_info *s; | |
70 | ||
40b275b6 | 71 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
4d33960b | 72 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 73 | if (!s) |
be8755e1 MW |
74 | return -ENOENT; |
75 | if (s == sta) { | |
cf778b00 | 76 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 77 | s->hnext); |
be8755e1 | 78 | return 0; |
f0706e82 JB |
79 | } |
80 | ||
40b275b6 JB |
81 | while (rcu_access_pointer(s->hnext) && |
82 | rcu_access_pointer(s->hnext) != sta) | |
83 | s = rcu_dereference_protected(s->hnext, | |
4d33960b | 84 | lockdep_is_held(&local->sta_mtx)); |
40b275b6 | 85 | if (rcu_access_pointer(s->hnext)) { |
cf778b00 | 86 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
87 | return 0; |
88 | } | |
f0706e82 | 89 | |
be8755e1 | 90 | return -ENOENT; |
f0706e82 JB |
91 | } |
92 | ||
d0709a65 | 93 | /* protected by RCU */ |
abe60632 JB |
94 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
95 | const u8 *addr) | |
f0706e82 | 96 | { |
abe60632 | 97 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
98 | struct sta_info *sta; |
99 | ||
2a33bee2 | 100 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
2a33bee2 GE |
101 | lockdep_is_held(&local->sta_mtx)); |
102 | while (sta) { | |
103 | if (sta->sdata == sdata && !sta->dummy && | |
104 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
105 | break; | |
106 | sta = rcu_dereference_check(sta->hnext, | |
2a33bee2 GE |
107 | lockdep_is_held(&local->sta_mtx)); |
108 | } | |
109 | return sta; | |
110 | } | |
111 | ||
112 | /* get a station info entry even if it is a dummy station*/ | |
113 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, | |
114 | const u8 *addr) | |
115 | { | |
116 | struct ieee80211_local *local = sdata->local; | |
117 | struct sta_info *sta; | |
118 | ||
0379185b | 119 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 120 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 121 | while (sta) { |
abe60632 JB |
122 | if (sta->sdata == sdata && |
123 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 124 | break; |
0379185b | 125 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 126 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 127 | } |
43ba7e95 JB |
128 | return sta; |
129 | } | |
130 | ||
0e5ded5a FF |
131 | /* |
132 | * Get sta info either from the specified interface | |
133 | * or from one of its vlans | |
134 | */ | |
135 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
136 | const u8 *addr) | |
137 | { | |
138 | struct ieee80211_local *local = sdata->local; | |
139 | struct sta_info *sta; | |
140 | ||
2a33bee2 | 141 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
2a33bee2 GE |
142 | lockdep_is_held(&local->sta_mtx)); |
143 | while (sta) { | |
144 | if ((sta->sdata == sdata || | |
145 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && | |
146 | !sta->dummy && | |
147 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
148 | break; | |
149 | sta = rcu_dereference_check(sta->hnext, | |
2a33bee2 GE |
150 | lockdep_is_held(&local->sta_mtx)); |
151 | } | |
152 | return sta; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Get sta info either from the specified interface | |
157 | * or from one of its vlans (including dummy stations) | |
158 | */ | |
159 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, | |
160 | const u8 *addr) | |
161 | { | |
162 | struct ieee80211_local *local = sdata->local; | |
163 | struct sta_info *sta; | |
164 | ||
0379185b | 165 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 166 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
167 | while (sta) { |
168 | if ((sta->sdata == sdata || | |
a2c1e3da | 169 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
0e5ded5a FF |
170 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) |
171 | break; | |
0379185b | 172 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 173 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
174 | } |
175 | return sta; | |
176 | } | |
177 | ||
3b53fde8 JB |
178 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
179 | int idx) | |
ee385855 | 180 | { |
3b53fde8 | 181 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
182 | struct sta_info *sta; |
183 | int i = 0; | |
184 | ||
d0709a65 | 185 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 186 | if (sdata != sta->sdata) |
2a8ca29a | 187 | continue; |
ee385855 LCC |
188 | if (i < idx) { |
189 | ++i; | |
190 | continue; | |
ee385855 | 191 | } |
2a8ca29a | 192 | return sta; |
ee385855 | 193 | } |
ee385855 LCC |
194 | |
195 | return NULL; | |
196 | } | |
f0706e82 | 197 | |
93e5deb1 | 198 | /** |
d9a7ddb0 | 199 | * sta_info_free - free STA |
93e5deb1 | 200 | * |
6ef307bc | 201 | * @local: pointer to the global information |
93e5deb1 JB |
202 | * @sta: STA info to free |
203 | * | |
204 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
205 | * that may happen before sta_info_insert(). It may only be |
206 | * called when sta_info_insert() has not been attempted (and | |
207 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 208 | */ |
d9a7ddb0 | 209 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 210 | { |
af65cd96 JB |
211 | if (sta->rate_ctrl) { |
212 | rate_control_free_sta(sta); | |
213 | rate_control_put(sta->rate_ctrl); | |
214 | } | |
93e5deb1 JB |
215 | |
216 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 217 | wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
218 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
219 | ||
220 | kfree(sta); | |
221 | } | |
222 | ||
4d33960b | 223 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
224 | static void sta_info_hash_add(struct ieee80211_local *local, |
225 | struct sta_info *sta) | |
f0706e82 | 226 | { |
4d33960b | 227 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 228 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 229 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 230 | } |
f0706e82 | 231 | |
af818581 JB |
232 | static void sta_unblock(struct work_struct *wk) |
233 | { | |
234 | struct sta_info *sta; | |
235 | ||
236 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
237 | ||
238 | if (sta->dead) | |
239 | return; | |
240 | ||
c2c98fde | 241 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) |
af818581 | 242 | ieee80211_sta_ps_deliver_wakeup(sta); |
c2c98fde JB |
243 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { |
244 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
245 | |
246 | local_bh_disable(); | |
af818581 | 247 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 248 | local_bh_enable(); |
c2c98fde JB |
249 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
250 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
251 | |
252 | local_bh_disable(); | |
47086fc5 | 253 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 254 | local_bh_enable(); |
50a9432d | 255 | } else |
c2c98fde | 256 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
257 | } |
258 | ||
af65cd96 JB |
259 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
260 | struct sta_info *sta, gfp_t gfp) | |
261 | { | |
262 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
263 | return 0; | |
264 | ||
265 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
266 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, | |
267 | &sta->sta, gfp); | |
268 | if (!sta->rate_ctrl_priv) { | |
269 | rate_control_put(sta->rate_ctrl); | |
270 | return -ENOMEM; | |
271 | } | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
73651ee6 | 276 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 277 | const u8 *addr, gfp_t gfp) |
f0706e82 | 278 | { |
d0709a65 | 279 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 280 | struct sta_info *sta; |
ebe27c91 | 281 | struct timespec uptime; |
16c5f15c | 282 | int i; |
f0706e82 | 283 | |
17741cdc | 284 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 285 | if (!sta) |
73651ee6 | 286 | return NULL; |
f0706e82 | 287 | |
07346f81 | 288 | spin_lock_init(&sta->lock); |
af818581 | 289 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 290 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 291 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 292 | |
17741cdc | 293 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
294 | sta->local = local; |
295 | sta->sdata = sdata; | |
8bc8aecd | 296 | sta->last_rx = jiffies; |
f0706e82 | 297 | |
ebe27c91 MSS |
298 | do_posix_clock_monotonic_gettime(&uptime); |
299 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
300 | ewma_init(&sta->avg_signal, 1024, 8); |
301 | ||
af65cd96 | 302 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 303 | kfree(sta); |
73651ee6 | 304 | return NULL; |
f0706e82 JB |
305 | } |
306 | ||
16c5f15c | 307 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
308 | /* |
309 | * timer_to_tid must be initialized with identity mapping | |
310 | * to enable session_timer's data differentiation. See | |
311 | * sta_rx_agg_session_timer_expired for usage. | |
312 | */ | |
16c5f15c | 313 | sta->timer_to_tid[i] = i; |
16c5f15c | 314 | } |
948d887d JB |
315 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
316 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
317 | skb_queue_head_init(&sta->tx_filtered[i]); | |
318 | } | |
73651ee6 | 319 | |
cccaec98 | 320 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 321 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 322 | |
73651ee6 | 323 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 324 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
325 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
326 | ||
03e4497e | 327 | #ifdef CONFIG_MAC80211_MESH |
57cf8043 | 328 | sta->plink_state = NL80211_PLINK_LISTEN; |
03e4497e JB |
329 | init_timer(&sta->plink_timer); |
330 | #endif | |
331 | ||
73651ee6 JB |
332 | return sta; |
333 | } | |
334 | ||
8c71df7a | 335 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 336 | { |
34e89507 | 337 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 338 | |
03e4497e JB |
339 | /* |
340 | * Can't be a WARN_ON because it can be triggered through a race: | |
341 | * something inserts a STA (on one CPU) without holding the RTNL | |
342 | * and another CPU turns off the net device. | |
343 | */ | |
8c71df7a GE |
344 | if (unlikely(!ieee80211_sdata_running(sdata))) |
345 | return -ENETDOWN; | |
03e4497e | 346 | |
47846c9b | 347 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
8c71df7a GE |
348 | is_multicast_ether_addr(sta->sta.addr))) |
349 | return -EINVAL; | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
8c71df7a GE |
354 | /* |
355 | * should be called with sta_mtx locked | |
356 | * this function replaces the mutex lock | |
357 | * with a RCU lock | |
358 | */ | |
4d33960b | 359 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
360 | { |
361 | struct ieee80211_local *local = sta->local; | |
362 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2a33bee2 GE |
363 | struct sta_info *exist_sta; |
364 | bool dummy_reinsert = false; | |
8c71df7a GE |
365 | int err = 0; |
366 | ||
367 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 368 | |
2a33bee2 GE |
369 | /* |
370 | * check if STA exists already. | |
4d33960b | 371 | * only accept a scenario of a second call to sta_info_insert_finish |
2a33bee2 GE |
372 | * with a dummy station entry that was inserted earlier |
373 | * in that case - assume that the dummy station flag should | |
374 | * be removed. | |
375 | */ | |
376 | exist_sta = sta_info_get_bss_rx(sdata, sta->sta.addr); | |
377 | if (exist_sta) { | |
378 | if (exist_sta == sta && sta->dummy) { | |
379 | dummy_reinsert = true; | |
380 | } else { | |
4d33960b JB |
381 | err = -EEXIST; |
382 | goto out_err; | |
2a33bee2 | 383 | } |
43ba7e95 | 384 | } |
32bfd35d | 385 | |
4d33960b JB |
386 | if (!sta->dummy || dummy_reinsert) { |
387 | /* notify driver */ | |
388 | err = drv_sta_add(local, sdata, &sta->sta); | |
389 | if (err) { | |
390 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
391 | goto out_err; | |
392 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to " | |
393 | "driver (%d) - keeping it anyway.\n", | |
394 | sdata->name, sta->sta.addr, err); | |
395 | } else | |
396 | sta->uploaded = true; | |
397 | } | |
32bfd35d | 398 | |
4d33960b JB |
399 | if (!dummy_reinsert) { |
400 | local->num_sta++; | |
401 | local->sta_generation++; | |
402 | smp_mb(); | |
403 | ||
404 | /* make the station visible */ | |
405 | sta_info_hash_add(local, sta); | |
406 | ||
407 | list_add(&sta->list, &local->sta_list); | |
408 | } else { | |
409 | sta->dummy = false; | |
410 | } | |
411 | ||
412 | if (!sta->dummy) { | |
413 | struct station_info sinfo; | |
414 | ||
415 | ieee80211_sta_debugfs_add(sta); | |
416 | rate_control_add_sta_debugfs(sta); | |
417 | ||
418 | memset(&sinfo, 0, sizeof(sinfo)); | |
419 | sinfo.filled = 0; | |
420 | sinfo.generation = local->sta_generation; | |
421 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
32bfd35d | 422 | } |
d0709a65 | 423 | |
f0706e82 | 424 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
425 | wiphy_debug(local->hw.wiphy, "Inserted %sSTA %pM\n", |
426 | sta->dummy ? "dummy " : "", sta->sta.addr); | |
f0706e82 JB |
427 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
428 | ||
34e89507 JB |
429 | /* move reference to rcu-protected */ |
430 | rcu_read_lock(); | |
431 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 432 | |
73651ee6 JB |
433 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
434 | mesh_accept_plinks_update(sdata); | |
435 | ||
8c71df7a | 436 | return 0; |
4d33960b JB |
437 | out_err: |
438 | mutex_unlock(&local->sta_mtx); | |
439 | rcu_read_lock(); | |
440 | return err; | |
8c71df7a GE |
441 | } |
442 | ||
443 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
444 | { | |
445 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
446 | int err = 0; |
447 | ||
4d33960b JB |
448 | might_sleep(); |
449 | ||
8c71df7a GE |
450 | err = sta_info_insert_check(sta); |
451 | if (err) { | |
452 | rcu_read_lock(); | |
453 | goto out_free; | |
454 | } | |
455 | ||
8c71df7a GE |
456 | mutex_lock(&local->sta_mtx); |
457 | ||
4d33960b | 458 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
459 | if (err) |
460 | goto out_free; | |
461 | ||
73651ee6 | 462 | return 0; |
93e5deb1 JB |
463 | out_free: |
464 | BUG_ON(!err); | |
d9a7ddb0 | 465 | sta_info_free(local, sta); |
93e5deb1 | 466 | return err; |
f0706e82 JB |
467 | } |
468 | ||
34e89507 JB |
469 | int sta_info_insert(struct sta_info *sta) |
470 | { | |
471 | int err = sta_info_insert_rcu(sta); | |
472 | ||
473 | rcu_read_unlock(); | |
474 | ||
475 | return err; | |
476 | } | |
477 | ||
2a33bee2 GE |
478 | /* Caller must hold sta->local->sta_mtx */ |
479 | int sta_info_reinsert(struct sta_info *sta) | |
480 | { | |
481 | struct ieee80211_local *local = sta->local; | |
482 | int err = 0; | |
483 | ||
484 | err = sta_info_insert_check(sta); | |
485 | if (err) { | |
486 | mutex_unlock(&local->sta_mtx); | |
487 | return err; | |
488 | } | |
489 | ||
490 | might_sleep(); | |
491 | ||
4d33960b | 492 | err = sta_info_insert_finish(sta); |
2a33bee2 GE |
493 | rcu_read_unlock(); |
494 | return err; | |
495 | } | |
496 | ||
004c872e JB |
497 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
498 | { | |
499 | /* | |
500 | * This format has been mandated by the IEEE specifications, | |
501 | * so this line may not be changed to use the __set_bit() format. | |
502 | */ | |
503 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
504 | } | |
505 | ||
506 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
507 | { | |
508 | /* | |
509 | * This format has been mandated by the IEEE specifications, | |
510 | * so this line may not be changed to use the __clear_bit() format. | |
511 | */ | |
512 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
513 | } | |
514 | ||
948d887d | 515 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 516 | { |
948d887d JB |
517 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
518 | switch (ac) { | |
519 | case IEEE80211_AC_VO: | |
520 | return BIT(6) | BIT(7); | |
521 | case IEEE80211_AC_VI: | |
522 | return BIT(4) | BIT(5); | |
523 | case IEEE80211_AC_BE: | |
524 | return BIT(0) | BIT(3); | |
525 | case IEEE80211_AC_BK: | |
526 | return BIT(1) | BIT(2); | |
527 | default: | |
528 | WARN_ON(1); | |
529 | return 0; | |
d0709a65 | 530 | } |
004c872e JB |
531 | } |
532 | ||
c868cb35 | 533 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 534 | { |
c868cb35 JB |
535 | struct ieee80211_local *local = sta->local; |
536 | struct ieee80211_if_ap *bss = sta->sdata->bss; | |
d0709a65 | 537 | unsigned long flags; |
948d887d JB |
538 | bool indicate_tim = false; |
539 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
540 | int ac; | |
004c872e | 541 | |
c868cb35 JB |
542 | if (WARN_ON_ONCE(!sta->sdata->bss)) |
543 | return; | |
3e122be0 | 544 | |
c868cb35 JB |
545 | /* No need to do anything if the driver does all */ |
546 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
547 | return; | |
004c872e | 548 | |
c868cb35 JB |
549 | if (sta->dead) |
550 | goto done; | |
3e122be0 | 551 | |
948d887d JB |
552 | /* |
553 | * If all ACs are delivery-enabled then we should build | |
554 | * the TIM bit for all ACs anyway; if only some are then | |
555 | * we ignore those and build the TIM bit using only the | |
556 | * non-enabled ones. | |
557 | */ | |
558 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
559 | ignore_for_tim = 0; | |
560 | ||
561 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
562 | unsigned long tids; | |
3e122be0 | 563 | |
948d887d JB |
564 | if (ignore_for_tim & BIT(ac)) |
565 | continue; | |
566 | ||
567 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
568 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
569 | if (indicate_tim) | |
570 | break; | |
3e122be0 | 571 | |
948d887d JB |
572 | tids = ieee80211_tids_for_ac(ac); |
573 | ||
574 | indicate_tim |= | |
575 | sta->driver_buffered_tids & tids; | |
d0709a65 | 576 | } |
004c872e | 577 | |
c868cb35 | 578 | done: |
4d33960b | 579 | spin_lock_irqsave(&local->tim_lock, flags); |
004c872e | 580 | |
948d887d | 581 | if (indicate_tim) |
c868cb35 JB |
582 | __bss_tim_set(bss, sta->sta.aid); |
583 | else | |
584 | __bss_tim_clear(bss, sta->sta.aid); | |
004c872e | 585 | |
c868cb35 JB |
586 | if (local->ops->set_tim) { |
587 | local->tim_in_locked_section = true; | |
948d887d | 588 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
589 | local->tim_in_locked_section = false; |
590 | } | |
3e122be0 | 591 | |
4d33960b | 592 | spin_unlock_irqrestore(&local->tim_lock, flags); |
004c872e JB |
593 | } |
594 | ||
cd0b8d89 | 595 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 596 | { |
e039fa4a | 597 | struct ieee80211_tx_info *info; |
f0706e82 JB |
598 | int timeout; |
599 | ||
600 | if (!skb) | |
cd0b8d89 | 601 | return false; |
f0706e82 | 602 | |
e039fa4a | 603 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
604 | |
605 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
606 | timeout = (sta->listen_interval * |
607 | sta->sdata->vif.bss_conf.beacon_int * | |
608 | 32 / 15625) * HZ; | |
f0706e82 JB |
609 | if (timeout < STA_TX_BUFFER_EXPIRE) |
610 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 611 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
612 | } |
613 | ||
614 | ||
948d887d JB |
615 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
616 | struct sta_info *sta, int ac) | |
f0706e82 JB |
617 | { |
618 | unsigned long flags; | |
619 | struct sk_buff *skb; | |
620 | ||
60750397 JB |
621 | /* |
622 | * First check for frames that should expire on the filtered | |
623 | * queue. Frames here were rejected by the driver and are on | |
624 | * a separate queue to avoid reordering with normal PS-buffered | |
625 | * frames. They also aren't accounted for right now in the | |
626 | * total_ps_buffered counter. | |
627 | */ | |
628 | for (;;) { | |
948d887d JB |
629 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
630 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 631 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 632 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
633 | else |
634 | skb = NULL; | |
948d887d | 635 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
636 | |
637 | /* | |
638 | * Frames are queued in order, so if this one | |
639 | * hasn't expired yet we can stop testing. If | |
640 | * we actually reached the end of the queue we | |
641 | * also need to stop, of course. | |
642 | */ | |
643 | if (!skb) | |
644 | break; | |
645 | dev_kfree_skb(skb); | |
646 | } | |
647 | ||
648 | /* | |
649 | * Now also check the normal PS-buffered queue, this will | |
650 | * only find something if the filtered queue was emptied | |
651 | * since the filtered frames are all before the normal PS | |
652 | * buffered frames. | |
653 | */ | |
f0706e82 | 654 | for (;;) { |
948d887d JB |
655 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
656 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 657 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 658 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 659 | else |
f0706e82 | 660 | skb = NULL; |
948d887d | 661 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 662 | |
60750397 JB |
663 | /* |
664 | * frames are queued in order, so if this one | |
665 | * hasn't expired yet (or we reached the end of | |
666 | * the queue) we can stop testing | |
667 | */ | |
836341a7 | 668 | if (!skb) |
f0706e82 | 669 | break; |
836341a7 | 670 | |
836341a7 | 671 | local->total_ps_buffered--; |
f4ea83dd | 672 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
673 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
674 | sta->sta.addr); | |
f4ea83dd | 675 | #endif |
836341a7 | 676 | dev_kfree_skb(skb); |
f0706e82 | 677 | } |
3393a608 | 678 | |
60750397 JB |
679 | /* |
680 | * Finally, recalculate the TIM bit for this station -- it might | |
681 | * now be clear because the station was too slow to retrieve its | |
682 | * frames. | |
683 | */ | |
684 | sta_info_recalc_tim(sta); | |
685 | ||
686 | /* | |
687 | * Return whether there are any frames still buffered, this is | |
688 | * used to check whether the cleanup timer still needs to run, | |
689 | * if there are no frames we don't need to rearm the timer. | |
690 | */ | |
948d887d JB |
691 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
692 | skb_queue_empty(&sta->tx_filtered[ac])); | |
693 | } | |
694 | ||
695 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
696 | struct sta_info *sta) | |
697 | { | |
698 | bool have_buffered = false; | |
699 | int ac; | |
700 | ||
701 | /* This is only necessary for stations on BSS interfaces */ | |
702 | if (!sta->sdata->bss) | |
703 | return false; | |
704 | ||
705 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
706 | have_buffered |= | |
707 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
708 | ||
709 | return have_buffered; | |
f0706e82 JB |
710 | } |
711 | ||
34e89507 | 712 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 713 | { |
34e89507 JB |
714 | struct ieee80211_local *local; |
715 | struct ieee80211_sub_if_data *sdata; | |
948d887d | 716 | int ret, i, ac; |
42624d49 | 717 | struct tid_ampdu_tx *tid_tx; |
f0706e82 | 718 | |
34e89507 | 719 | might_sleep(); |
f0706e82 | 720 | |
34e89507 JB |
721 | if (!sta) |
722 | return -ENOENT; | |
5bb644a0 | 723 | |
34e89507 JB |
724 | local = sta->local; |
725 | sdata = sta->sdata; | |
f0706e82 | 726 | |
098a6070 JB |
727 | /* |
728 | * Before removing the station from the driver and | |
729 | * rate control, it might still start new aggregation | |
730 | * sessions -- block that to make sure the tear-down | |
731 | * will be sufficient. | |
732 | */ | |
c2c98fde | 733 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 734 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 735 | |
34e89507 | 736 | ret = sta_info_hash_del(local, sta); |
34e89507 JB |
737 | if (ret) |
738 | return ret; | |
739 | ||
4d33960b JB |
740 | list_del(&sta->list); |
741 | ||
8cb23153 | 742 | mutex_lock(&local->key_mtx); |
e31b8213 | 743 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 744 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 745 | if (sta->ptk) |
40b275b6 | 746 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 747 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
748 | |
749 | sta->dead = true; | |
750 | ||
c2c98fde JB |
751 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
752 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { | |
34e89507 JB |
753 | BUG_ON(!sdata->bss); |
754 | ||
c2c98fde JB |
755 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
756 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
757 | ||
34e89507 | 758 | atomic_dec(&sdata->bss->num_sta_ps); |
c868cb35 | 759 | sta_info_recalc_tim(sta); |
34e89507 JB |
760 | } |
761 | ||
762 | local->num_sta--; | |
763 | local->sta_generation++; | |
764 | ||
765 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 766 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 | 767 | |
d9a7ddb0 JB |
768 | while (sta->sta_state > IEEE80211_STA_NONE) |
769 | sta_info_move_state(sta, sta->sta_state - 1); | |
770 | ||
34e89507 JB |
771 | if (sta->uploaded) { |
772 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
773 | sdata = container_of(sdata->bss, | |
774 | struct ieee80211_sub_if_data, | |
775 | u.ap); | |
776 | drv_sta_remove(local, sdata, &sta->sta); | |
777 | sdata = sta->sdata; | |
778 | } | |
779 | ||
e64b3795 JB |
780 | /* |
781 | * At this point, after we wait for an RCU grace period, | |
782 | * neither mac80211 nor the driver can reference this | |
783 | * sta struct any more except by still existing timers | |
784 | * associated with this station that we clean up below. | |
785 | */ | |
786 | synchronize_rcu(); | |
787 | ||
948d887d JB |
788 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
789 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
790 | __skb_queue_purge(&sta->ps_tx_buf[ac]); | |
791 | __skb_queue_purge(&sta->tx_filtered[ac]); | |
792 | } | |
c868cb35 | 793 | |
34e89507 | 794 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 795 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 796 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
797 | #endif |
798 | ||
799 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 800 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
801 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
802 | cancel_work_sync(&sta->drv_unblock_wk); | |
803 | ||
ec15e68b JM |
804 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
805 | ||
34e89507 JB |
806 | rate_control_remove_sta_debugfs(sta); |
807 | ieee80211_sta_debugfs_remove(sta); | |
808 | ||
809 | #ifdef CONFIG_MAC80211_MESH | |
810 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
811 | mesh_plink_deactivate(sta); | |
812 | del_timer_sync(&sta->plink_timer); | |
813 | } | |
814 | #endif | |
815 | ||
42624d49 YAP |
816 | /* There could be some memory leaks because of ampdu tx pending queue |
817 | * not being freed before destroying the station info. | |
818 | * | |
819 | * Make sure that such queues are purged before freeing the station | |
820 | * info. | |
821 | * TODO: We have to somehow postpone the full destruction | |
822 | * until the aggregation stop completes. Refer | |
823 | * http://thread.gmane.org/gmane.linux.kernel.wireless.general/81936 | |
824 | */ | |
27bf8882 YAP |
825 | |
826 | mutex_lock(&sta->ampdu_mlme.mtx); | |
827 | ||
42624d49 | 828 | for (i = 0; i < STA_TID_NUM; i++) { |
27bf8882 YAP |
829 | tid_tx = rcu_dereference_protected_tid_tx(sta, i); |
830 | if (!tid_tx) | |
42624d49 | 831 | continue; |
42624d49 YAP |
832 | if (skb_queue_len(&tid_tx->pending)) { |
833 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
834 | wiphy_debug(local->hw.wiphy, "TX A-MPDU purging %d " | |
835 | "packets for tid=%d\n", | |
836 | skb_queue_len(&tid_tx->pending), i); | |
837 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
838 | __skb_queue_purge(&tid_tx->pending); | |
839 | } | |
840 | kfree_rcu(tid_tx, rcu_head); | |
841 | } | |
842 | ||
27bf8882 YAP |
843 | mutex_unlock(&sta->ampdu_mlme.mtx); |
844 | ||
d9a7ddb0 | 845 | sta_info_free(local, sta); |
34e89507 JB |
846 | |
847 | return 0; | |
4d6141c3 JS |
848 | } |
849 | ||
34e89507 | 850 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 851 | { |
34e89507 JB |
852 | struct sta_info *sta; |
853 | int ret; | |
4d6141c3 | 854 | |
34e89507 | 855 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 856 | sta = sta_info_get_rx(sdata, addr); |
34e89507 JB |
857 | ret = __sta_info_destroy(sta); |
858 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
859 | |
860 | return ret; | |
861 | } | |
862 | ||
34e89507 JB |
863 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
864 | const u8 *addr) | |
e9f207f0 | 865 | { |
34e89507 JB |
866 | struct sta_info *sta; |
867 | int ret; | |
e9f207f0 | 868 | |
34e89507 | 869 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 870 | sta = sta_info_get_bss_rx(sdata, addr); |
34e89507 JB |
871 | ret = __sta_info_destroy(sta); |
872 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 873 | |
34e89507 JB |
874 | return ret; |
875 | } | |
e9f207f0 | 876 | |
34e89507 JB |
877 | static void sta_info_cleanup(unsigned long data) |
878 | { | |
879 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
880 | struct sta_info *sta; | |
3393a608 | 881 | bool timer_needed = false; |
34e89507 JB |
882 | |
883 | rcu_read_lock(); | |
884 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
885 | if (sta_info_cleanup_expire_buffered(local, sta)) |
886 | timer_needed = true; | |
34e89507 | 887 | rcu_read_unlock(); |
e9f207f0 | 888 | |
34e89507 JB |
889 | if (local->quiescing) |
890 | return; | |
d0709a65 | 891 | |
3393a608 JO |
892 | if (!timer_needed) |
893 | return; | |
894 | ||
26d59535 JB |
895 | mod_timer(&local->sta_cleanup, |
896 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 897 | } |
e9f207f0 | 898 | |
f0706e82 JB |
899 | void sta_info_init(struct ieee80211_local *local) |
900 | { | |
4d33960b | 901 | spin_lock_init(&local->tim_lock); |
34e89507 | 902 | mutex_init(&local->sta_mtx); |
f0706e82 | 903 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 904 | |
b24b8a24 PE |
905 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
906 | (unsigned long)local); | |
f0706e82 JB |
907 | } |
908 | ||
909 | void sta_info_stop(struct ieee80211_local *local) | |
910 | { | |
f0706e82 | 911 | del_timer(&local->sta_cleanup); |
be8755e1 | 912 | sta_info_flush(local, NULL); |
f0706e82 JB |
913 | } |
914 | ||
f0706e82 JB |
915 | /** |
916 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
917 | * |
918 | * Returns the number of removed STA entries. | |
919 | * | |
f0706e82 | 920 | * @local: local interface data |
d0709a65 | 921 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 922 | */ |
44213b5e | 923 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 924 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
925 | { |
926 | struct sta_info *sta, *tmp; | |
44213b5e | 927 | int ret = 0; |
f0706e82 | 928 | |
d0709a65 | 929 | might_sleep(); |
be8755e1 | 930 | |
34e89507 | 931 | mutex_lock(&local->sta_mtx); |
d0709a65 | 932 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
933 | if (!sdata || sdata == sta->sdata) |
934 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 935 | } |
34e89507 | 936 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
937 | |
938 | return ret; | |
f0706e82 | 939 | } |
dc6676b7 | 940 | |
24723d1b JB |
941 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
942 | unsigned long exp_time) | |
943 | { | |
944 | struct ieee80211_local *local = sdata->local; | |
945 | struct sta_info *sta, *tmp; | |
24723d1b | 946 | |
34e89507 | 947 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
948 | |
949 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
950 | if (sdata != sta->sdata) |
951 | continue; | |
952 | ||
24723d1b JB |
953 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
954 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 955 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 956 | sdata->name, sta->sta.addr); |
24723d1b | 957 | #endif |
34e89507 | 958 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 959 | } |
e46a2cf9 MSS |
960 | } |
961 | ||
34e89507 | 962 | mutex_unlock(&local->sta_mtx); |
24723d1b | 963 | } |
17741cdc | 964 | |
686b9cb9 BG |
965 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
966 | const u8 *addr, | |
967 | const u8 *localaddr) | |
17741cdc | 968 | { |
abe60632 | 969 | struct sta_info *sta, *nxt; |
17741cdc | 970 | |
686b9cb9 BG |
971 | /* |
972 | * Just return a random station if localaddr is NULL | |
973 | * ... first in list. | |
974 | */ | |
f7c65594 | 975 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
976 | if (localaddr && |
977 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
978 | continue; | |
f7c65594 JB |
979 | if (!sta->uploaded) |
980 | return NULL; | |
abe60632 | 981 | return &sta->sta; |
f7c65594 JB |
982 | } |
983 | ||
abe60632 | 984 | return NULL; |
17741cdc | 985 | } |
686b9cb9 | 986 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
987 | |
988 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
989 | const u8 *addr) | |
990 | { | |
f7c65594 | 991 | struct sta_info *sta; |
5ed176e1 JB |
992 | |
993 | if (!vif) | |
994 | return NULL; | |
995 | ||
f7c65594 JB |
996 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
997 | if (!sta) | |
998 | return NULL; | |
999 | ||
1000 | if (!sta->uploaded) | |
1001 | return NULL; | |
5ed176e1 | 1002 | |
f7c65594 | 1003 | return &sta->sta; |
5ed176e1 | 1004 | } |
17741cdc | 1005 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1006 | |
50a9432d JB |
1007 | static void clear_sta_ps_flags(void *_sta) |
1008 | { | |
1009 | struct sta_info *sta = _sta; | |
1010 | ||
c2c98fde JB |
1011 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1012 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
50a9432d JB |
1013 | } |
1014 | ||
af818581 JB |
1015 | /* powersave support code */ |
1016 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1017 | { | |
1018 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1019 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1020 | struct sk_buff_head pending; |
1021 | int filtered = 0, buffered = 0, ac; | |
1022 | ||
c2c98fde | 1023 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1024 | |
948d887d JB |
1025 | BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1); |
1026 | sta->driver_buffered_tids = 0; | |
af818581 | 1027 | |
d057e5a3 AN |
1028 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1029 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1030 | |
948d887d | 1031 | skb_queue_head_init(&pending); |
af818581 JB |
1032 | |
1033 | /* Send all buffered frames to the station */ | |
948d887d JB |
1034 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1035 | int count = skb_queue_len(&pending), tmp; | |
1036 | ||
1037 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); | |
1038 | tmp = skb_queue_len(&pending); | |
1039 | filtered += tmp - count; | |
1040 | count = tmp; | |
1041 | ||
1042 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); | |
1043 | tmp = skb_queue_len(&pending); | |
1044 | buffered += tmp - count; | |
1045 | } | |
1046 | ||
1047 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1048 | ||
af818581 JB |
1049 | local->total_ps_buffered -= buffered; |
1050 | ||
c868cb35 JB |
1051 | sta_info_recalc_tim(sta); |
1052 | ||
af818581 JB |
1053 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
1054 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 1055 | "since STA not sleeping anymore\n", sdata->name, |
948d887d | 1056 | sta->sta.addr, sta->sta.aid, filtered, buffered); |
af818581 JB |
1057 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
1058 | } | |
1059 | ||
ce662b44 JB |
1060 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1061 | struct sta_info *sta, int tid, | |
40b96408 | 1062 | enum ieee80211_frame_release_type reason) |
af818581 | 1063 | { |
af818581 | 1064 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1065 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1066 | struct sk_buff *skb; |
ce662b44 JB |
1067 | int size = sizeof(*nullfunc); |
1068 | __le16 fc; | |
c2c98fde | 1069 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1070 | struct ieee80211_tx_info *info; |
af818581 | 1071 | |
ce662b44 JB |
1072 | if (qos) { |
1073 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1074 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1075 | IEEE80211_FCTL_FROMDS); | |
1076 | } else { | |
1077 | size -= 2; | |
1078 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1079 | IEEE80211_STYPE_NULLFUNC | | |
1080 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1081 | } |
af818581 | 1082 | |
ce662b44 JB |
1083 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1084 | if (!skb) | |
1085 | return; | |
1086 | ||
1087 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1088 | ||
1089 | nullfunc = (void *) skb_put(skb, size); | |
1090 | nullfunc->frame_control = fc; | |
1091 | nullfunc->duration_id = 0; | |
1092 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1093 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1094 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1095 | ||
59b66255 JB |
1096 | skb->priority = tid; |
1097 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1098 | if (qos) { |
ce662b44 JB |
1099 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1100 | ||
40b96408 | 1101 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1102 | nullfunc->qos_ctrl |= |
1103 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1104 | } | |
1105 | ||
1106 | info = IEEE80211_SKB_CB(skb); | |
1107 | ||
1108 | /* | |
1109 | * Tell TX path to send this frame even though the | |
1110 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1111 | * exchange. Also set EOSP to indicate this packet |
1112 | * ends the poll/service period. | |
ce662b44 | 1113 | */ |
deeaee19 JB |
1114 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE | |
1115 | IEEE80211_TX_STATUS_EOSP | | |
1116 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1117 | |
40b96408 JB |
1118 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1119 | ||
ce662b44 JB |
1120 | ieee80211_xmit(sdata, skb); |
1121 | } | |
1122 | ||
47086fc5 JB |
1123 | static void |
1124 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1125 | int n_frames, u8 ignored_acs, | |
1126 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1127 | { |
1128 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1129 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1130 | bool found = false; |
948d887d JB |
1131 | bool more_data = false; |
1132 | int ac; | |
4049e09a | 1133 | unsigned long driver_release_tids = 0; |
47086fc5 | 1134 | struct sk_buff_head frames; |
af818581 | 1135 | |
deeaee19 | 1136 | /* Service or PS-Poll period starts */ |
c2c98fde | 1137 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1138 | |
47086fc5 | 1139 | __skb_queue_head_init(&frames); |
948d887d JB |
1140 | |
1141 | /* | |
47086fc5 | 1142 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1143 | */ |
1144 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1145 | unsigned long tids; |
1146 | ||
47086fc5 | 1147 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1148 | continue; |
1149 | ||
4049e09a JB |
1150 | tids = ieee80211_tids_for_ac(ac); |
1151 | ||
1152 | if (!found) { | |
1153 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1154 | if (driver_release_tids) { | |
1155 | found = true; | |
1156 | } else { | |
47086fc5 JB |
1157 | struct sk_buff *skb; |
1158 | ||
1159 | while (n_frames > 0) { | |
1160 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1161 | if (!skb) { | |
1162 | skb = skb_dequeue( | |
1163 | &sta->ps_tx_buf[ac]); | |
1164 | if (skb) | |
1165 | local->total_ps_buffered--; | |
1166 | } | |
1167 | if (!skb) | |
1168 | break; | |
1169 | n_frames--; | |
4049e09a | 1170 | found = true; |
47086fc5 JB |
1171 | __skb_queue_tail(&frames, skb); |
1172 | } | |
948d887d | 1173 | } |
948d887d | 1174 | |
4049e09a JB |
1175 | /* |
1176 | * If the driver has data on more than one TID then | |
1177 | * certainly there's more data if we release just a | |
1178 | * single frame now (from a single TID). | |
1179 | */ | |
47086fc5 JB |
1180 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1181 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1182 | more_data = true; |
1183 | driver_release_tids = | |
1184 | BIT(ffs(driver_release_tids) - 1); | |
1185 | break; | |
1186 | } | |
1187 | } | |
948d887d JB |
1188 | |
1189 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1190 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1191 | more_data = true; | |
1192 | break; | |
1193 | } | |
af818581 | 1194 | } |
af818581 | 1195 | |
4049e09a | 1196 | if (!found) { |
ce662b44 | 1197 | int tid; |
af818581 JB |
1198 | |
1199 | /* | |
ce662b44 JB |
1200 | * For PS-Poll, this can only happen due to a race condition |
1201 | * when we set the TIM bit and the station notices it, but | |
1202 | * before it can poll for the frame we expire it. | |
1203 | * | |
1204 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1205 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1206 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1207 | * more than the value specified in the Max SP Length field | |
1208 | * in the QoS Capability element from delivery-enabled ACs, | |
1209 | * that are destined for the non-AP STA. | |
1210 | * | |
1211 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1212 | */ |
af818581 | 1213 | |
ce662b44 JB |
1214 | /* This will evaluate to 1, 3, 5 or 7. */ |
1215 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1216 | |
40b96408 | 1217 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1218 | return; |
1219 | } | |
af818581 | 1220 | |
47086fc5 JB |
1221 | if (!driver_release_tids) { |
1222 | struct sk_buff_head pending; | |
1223 | struct sk_buff *skb; | |
40b96408 JB |
1224 | int num = 0; |
1225 | u16 tids = 0; | |
af818581 | 1226 | |
47086fc5 | 1227 | skb_queue_head_init(&pending); |
af818581 | 1228 | |
47086fc5 JB |
1229 | while ((skb = __skb_dequeue(&frames))) { |
1230 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1231 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1232 | u8 *qoshdr = NULL; |
1233 | ||
1234 | num++; | |
af818581 | 1235 | |
47086fc5 JB |
1236 | /* |
1237 | * Tell TX path to send this frame even though the | |
1238 | * STA may still remain is PS mode after this frame | |
1239 | * exchange. | |
1240 | */ | |
1241 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE; | |
1242 | ||
1243 | /* | |
1244 | * Use MoreData flag to indicate whether there are | |
1245 | * more buffered frames for this STA | |
1246 | */ | |
24b9c373 | 1247 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1248 | hdr->frame_control |= |
1249 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1250 | else |
1251 | hdr->frame_control &= | |
1252 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1253 | |
40b96408 JB |
1254 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1255 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1256 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1257 | ||
1258 | /* set EOSP for the frame */ | |
47086fc5 | 1259 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && |
40b96408 JB |
1260 | qoshdr && skb_queue_empty(&frames)) |
1261 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
af818581 | 1262 | |
deeaee19 JB |
1263 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1264 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1265 | ||
40b96408 JB |
1266 | if (qoshdr) |
1267 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1268 | else | |
1269 | tids |= BIT(0); | |
1270 | ||
47086fc5 JB |
1271 | __skb_queue_tail(&pending, skb); |
1272 | } | |
af818581 | 1273 | |
40b96408 JB |
1274 | drv_allow_buffered_frames(local, sta, tids, num, |
1275 | reason, more_data); | |
1276 | ||
47086fc5 | 1277 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1278 | |
c868cb35 | 1279 | sta_info_recalc_tim(sta); |
af818581 JB |
1280 | } else { |
1281 | /* | |
4049e09a JB |
1282 | * We need to release a frame that is buffered somewhere in the |
1283 | * driver ... it'll have to handle that. | |
1284 | * Note that, as per the comment above, it'll also have to see | |
1285 | * if there is more than just one frame on the specific TID that | |
1286 | * we're releasing from, and it needs to set the more-data bit | |
1287 | * accordingly if we tell it that there's no more data. If we do | |
1288 | * tell it there's more data, then of course the more-data bit | |
1289 | * needs to be set anyway. | |
1290 | */ | |
1291 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1292 | n_frames, reason, more_data); |
4049e09a JB |
1293 | |
1294 | /* | |
1295 | * Note that we don't recalculate the TIM bit here as it would | |
1296 | * most likely have no effect at all unless the driver told us | |
1297 | * that the TID became empty before returning here from the | |
1298 | * release function. | |
1299 | * Either way, however, when the driver tells us that the TID | |
1300 | * became empty we'll do the TIM recalculation. | |
af818581 | 1301 | */ |
af818581 JB |
1302 | } |
1303 | } | |
1304 | ||
47086fc5 JB |
1305 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1306 | { | |
1307 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1308 | ||
1309 | /* | |
1310 | * If all ACs are delivery-enabled then we should reply | |
1311 | * from any of them, if only some are enabled we reply | |
1312 | * only from the non-enabled ones. | |
1313 | */ | |
1314 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1315 | ignore_for_response = 0; | |
1316 | ||
1317 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1318 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1319 | } | |
1320 | ||
1321 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1322 | { | |
1323 | int n_frames = sta->sta.max_sp; | |
1324 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1325 | ||
1326 | /* | |
1327 | * If we ever grow support for TSPEC this might happen if | |
1328 | * the TSPEC update from hostapd comes in between a trigger | |
1329 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1330 | * actually getting called. | |
1331 | */ | |
1332 | if (!delivery_enabled) | |
1333 | return; | |
1334 | ||
47086fc5 JB |
1335 | switch (sta->sta.max_sp) { |
1336 | case 1: | |
1337 | n_frames = 2; | |
1338 | break; | |
1339 | case 2: | |
1340 | n_frames = 4; | |
1341 | break; | |
1342 | case 3: | |
1343 | n_frames = 6; | |
1344 | break; | |
1345 | case 0: | |
1346 | /* XXX: what is a good value? */ | |
1347 | n_frames = 8; | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1352 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1353 | } | |
1354 | ||
af818581 JB |
1355 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1356 | struct ieee80211_sta *pubsta, bool block) | |
1357 | { | |
1358 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1359 | ||
b5878a2d JB |
1360 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1361 | ||
af818581 | 1362 | if (block) |
c2c98fde JB |
1363 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1364 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1365 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1366 | } | |
1367 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1368 | |
37fbd908 JB |
1369 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1370 | { | |
1371 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1372 | struct ieee80211_local *local = sta->local; | |
1373 | struct sk_buff *skb; | |
1374 | struct skb_eosp_msg_data *data; | |
1375 | ||
1376 | trace_api_eosp(local, pubsta); | |
1377 | ||
1378 | skb = alloc_skb(0, GFP_ATOMIC); | |
1379 | if (!skb) { | |
1380 | /* too bad ... but race is better than loss */ | |
1381 | clear_sta_flag(sta, WLAN_STA_SP); | |
1382 | return; | |
1383 | } | |
1384 | ||
1385 | data = (void *)skb->cb; | |
1386 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1387 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1388 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1389 | skb_queue_tail(&local->skb_queue, skb); | |
1390 | tasklet_schedule(&local->tasklet); | |
1391 | } | |
1392 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1393 | ||
042ec453 JB |
1394 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1395 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1396 | { |
1397 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1398 | ||
948d887d | 1399 | if (WARN_ON(tid >= STA_TID_NUM)) |
042ec453 JB |
1400 | return; |
1401 | ||
948d887d JB |
1402 | if (buffered) |
1403 | set_bit(tid, &sta->driver_buffered_tids); | |
1404 | else | |
1405 | clear_bit(tid, &sta->driver_buffered_tids); | |
1406 | ||
c868cb35 | 1407 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1408 | } |
042ec453 | 1409 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 JB |
1410 | |
1411 | int sta_info_move_state_checked(struct sta_info *sta, | |
1412 | enum ieee80211_sta_state new_state) | |
1413 | { | |
8bf11d8d | 1414 | might_sleep(); |
d9a7ddb0 JB |
1415 | |
1416 | if (sta->sta_state == new_state) | |
1417 | return 0; | |
1418 | ||
1419 | switch (new_state) { | |
1420 | case IEEE80211_STA_NONE: | |
1421 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1422 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
1423 | else | |
1424 | return -EINVAL; | |
1425 | break; | |
1426 | case IEEE80211_STA_AUTH: | |
1427 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1428 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1429 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1430 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
1431 | else | |
1432 | return -EINVAL; | |
1433 | break; | |
1434 | case IEEE80211_STA_ASSOC: | |
29623892 | 1435 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1436 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 JB |
1437 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
1438 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1439 | atomic_dec(&sta->sdata->u.ap.num_sta_authorized); | |
d9a7ddb0 | 1440 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
29623892 | 1441 | } else |
d9a7ddb0 JB |
1442 | return -EINVAL; |
1443 | break; | |
1444 | case IEEE80211_STA_AUTHORIZED: | |
29623892 JB |
1445 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
1446 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP) | |
1447 | atomic_inc(&sta->sdata->u.ap.num_sta_authorized); | |
d9a7ddb0 | 1448 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
29623892 | 1449 | } else |
d9a7ddb0 JB |
1450 | return -EINVAL; |
1451 | break; | |
1452 | default: | |
1453 | WARN(1, "invalid state %d", new_state); | |
1454 | return -EINVAL; | |
1455 | } | |
1456 | ||
1457 | printk(KERN_DEBUG "%s: moving STA %pM to state %d\n", | |
1458 | sta->sdata->name, sta->sta.addr, new_state); | |
1459 | sta->sta_state = new_state; | |
1460 | ||
1461 | return 0; | |
1462 | } |