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Commit | Line | Data |
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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" |
f0706e82 | 27 | |
d0709a65 JB |
28 | /** |
29 | * DOC: STA information lifetime rules | |
30 | * | |
31 | * STA info structures (&struct sta_info) are managed in a hash table | |
32 | * for faster lookup and a list for iteration. They are managed using | |
33 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
34 | * | |
34e89507 JB |
35 | * Upon allocating a STA info structure with sta_info_alloc(), the caller |
36 | * owns that structure. It must then insert it into the hash table using | |
37 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
38 | * case (which acquires an rcu read section but must not be called from | |
39 | * within one) will the pointer still be valid after the call. Note that | |
40 | * the caller may not do much with the STA info before inserting it, in | |
41 | * particular, it may not start any mesh peer link management or add | |
42 | * encryption keys. | |
93e5deb1 JB |
43 | * |
44 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
45 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 46 | * |
34e89507 | 47 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
48 | * peer. This means different things for the different type of interfaces |
49 | * we support. For a regular station this mean we add the AP sta when we | |
50 | * receive an assocation response from the AP. For IBSS this occurs when | |
34e89507 JB |
51 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
52 | * the peer imediately upon device open. When using AP mode we add stations | |
53 | * for each respective station upon request from userspace through nl80211. | |
7e189a12 | 54 | * |
34e89507 JB |
55 | * In order to remove a STA info structure, various sta_info_destroy_*() |
56 | * calls are available. | |
d0709a65 | 57 | * |
34e89507 JB |
58 | * There is no concept of ownership on a STA entry, each structure is |
59 | * owned by the global hash table/list until it is removed. All users of | |
60 | * the structure need to be RCU protected so that the structure won't be | |
61 | * freed before they are done using it. | |
d0709a65 | 62 | */ |
f0706e82 JB |
63 | |
64 | /* Caller must hold local->sta_lock */ | |
be8755e1 MW |
65 | static int sta_info_hash_del(struct ieee80211_local *local, |
66 | struct sta_info *sta) | |
f0706e82 JB |
67 | { |
68 | struct sta_info *s; | |
69 | ||
17741cdc | 70 | s = local->sta_hash[STA_HASH(sta->sta.addr)]; |
f0706e82 | 71 | if (!s) |
be8755e1 MW |
72 | return -ENOENT; |
73 | if (s == sta) { | |
17741cdc | 74 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 75 | s->hnext); |
be8755e1 | 76 | return 0; |
f0706e82 JB |
77 | } |
78 | ||
be8755e1 | 79 | while (s->hnext && s->hnext != sta) |
f0706e82 | 80 | s = s->hnext; |
be8755e1 | 81 | if (s->hnext) { |
d0709a65 | 82 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
83 | return 0; |
84 | } | |
f0706e82 | 85 | |
be8755e1 | 86 | return -ENOENT; |
f0706e82 JB |
87 | } |
88 | ||
d0709a65 | 89 | /* protected by RCU */ |
abe60632 JB |
90 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
91 | const u8 *addr) | |
f0706e82 | 92 | { |
abe60632 | 93 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
94 | struct sta_info *sta; |
95 | ||
0379185b JB |
96 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
97 | rcu_read_lock_held() || | |
98 | lockdep_is_held(&local->sta_lock) || | |
99 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 100 | while (sta) { |
abe60632 JB |
101 | if (sta->sdata == sdata && |
102 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 103 | break; |
0379185b JB |
104 | sta = rcu_dereference_check(sta->hnext, |
105 | rcu_read_lock_held() || | |
106 | lockdep_is_held(&local->sta_lock) || | |
107 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 108 | } |
43ba7e95 JB |
109 | return sta; |
110 | } | |
111 | ||
0e5ded5a FF |
112 | /* |
113 | * Get sta info either from the specified interface | |
114 | * or from one of its vlans | |
115 | */ | |
116 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
117 | const u8 *addr) | |
118 | { | |
119 | struct ieee80211_local *local = sdata->local; | |
120 | struct sta_info *sta; | |
121 | ||
0379185b JB |
122 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
123 | rcu_read_lock_held() || | |
124 | lockdep_is_held(&local->sta_lock) || | |
125 | lockdep_is_held(&local->sta_mtx)); | |
0e5ded5a FF |
126 | while (sta) { |
127 | if ((sta->sdata == sdata || | |
a2c1e3da | 128 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
0e5ded5a FF |
129 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) |
130 | break; | |
0379185b JB |
131 | sta = rcu_dereference_check(sta->hnext, |
132 | rcu_read_lock_held() || | |
133 | lockdep_is_held(&local->sta_lock) || | |
134 | lockdep_is_held(&local->sta_mtx)); | |
0e5ded5a FF |
135 | } |
136 | return sta; | |
137 | } | |
138 | ||
3b53fde8 JB |
139 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
140 | int idx) | |
ee385855 | 141 | { |
3b53fde8 | 142 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
143 | struct sta_info *sta; |
144 | int i = 0; | |
145 | ||
d0709a65 | 146 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 147 | if (sdata != sta->sdata) |
2a8ca29a | 148 | continue; |
ee385855 LCC |
149 | if (i < idx) { |
150 | ++i; | |
151 | continue; | |
ee385855 | 152 | } |
2a8ca29a | 153 | return sta; |
ee385855 | 154 | } |
ee385855 LCC |
155 | |
156 | return NULL; | |
157 | } | |
f0706e82 | 158 | |
93e5deb1 JB |
159 | /** |
160 | * __sta_info_free - internal STA free helper | |
161 | * | |
6ef307bc | 162 | * @local: pointer to the global information |
93e5deb1 JB |
163 | * @sta: STA info to free |
164 | * | |
165 | * This function must undo everything done by sta_info_alloc() | |
166 | * that may happen before sta_info_insert(). | |
167 | */ | |
168 | static void __sta_info_free(struct ieee80211_local *local, | |
169 | struct sta_info *sta) | |
170 | { | |
af65cd96 JB |
171 | if (sta->rate_ctrl) { |
172 | rate_control_free_sta(sta); | |
173 | rate_control_put(sta->rate_ctrl); | |
174 | } | |
93e5deb1 JB |
175 | |
176 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 177 | wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
178 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
179 | ||
180 | kfree(sta); | |
181 | } | |
182 | ||
d0709a65 JB |
183 | /* Caller must hold local->sta_lock */ |
184 | static void sta_info_hash_add(struct ieee80211_local *local, | |
185 | struct sta_info *sta) | |
f0706e82 | 186 | { |
17741cdc JB |
187 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
188 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); | |
f0706e82 | 189 | } |
f0706e82 | 190 | |
af818581 JB |
191 | static void sta_unblock(struct work_struct *wk) |
192 | { | |
193 | struct sta_info *sta; | |
194 | ||
195 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
196 | ||
197 | if (sta->dead) | |
198 | return; | |
199 | ||
200 | if (!test_sta_flags(sta, WLAN_STA_PS_STA)) | |
201 | ieee80211_sta_ps_deliver_wakeup(sta); | |
50a9432d JB |
202 | else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) { |
203 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
af818581 | 204 | ieee80211_sta_ps_deliver_poll_response(sta); |
50a9432d JB |
205 | } else |
206 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
af818581 JB |
207 | } |
208 | ||
af65cd96 JB |
209 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
210 | struct sta_info *sta, gfp_t gfp) | |
211 | { | |
212 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
213 | return 0; | |
214 | ||
215 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
216 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, | |
217 | &sta->sta, gfp); | |
218 | if (!sta->rate_ctrl_priv) { | |
219 | rate_control_put(sta->rate_ctrl); | |
220 | return -ENOMEM; | |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
73651ee6 JB |
226 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
227 | u8 *addr, gfp_t gfp) | |
f0706e82 | 228 | { |
d0709a65 | 229 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 230 | struct sta_info *sta; |
16c5f15c | 231 | int i; |
f0706e82 | 232 | |
17741cdc | 233 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 234 | if (!sta) |
73651ee6 | 235 | return NULL; |
f0706e82 | 236 | |
07346f81 | 237 | spin_lock_init(&sta->lock); |
5a9f7b04 | 238 | spin_lock_init(&sta->flaglock); |
af818581 | 239 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 240 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 241 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 242 | |
17741cdc | 243 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
244 | sta->local = local; |
245 | sta->sdata = sdata; | |
8bc8aecd | 246 | sta->last_rx = jiffies; |
f0706e82 | 247 | |
541a45a1 BR |
248 | ewma_init(&sta->avg_signal, 1024, 8); |
249 | ||
af65cd96 | 250 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 251 | kfree(sta); |
73651ee6 | 252 | return NULL; |
f0706e82 JB |
253 | } |
254 | ||
16c5f15c | 255 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
256 | /* |
257 | * timer_to_tid must be initialized with identity mapping | |
258 | * to enable session_timer's data differentiation. See | |
259 | * sta_rx_agg_session_timer_expired for usage. | |
260 | */ | |
16c5f15c | 261 | sta->timer_to_tid[i] = i; |
16c5f15c | 262 | } |
f0706e82 JB |
263 | skb_queue_head_init(&sta->ps_tx_buf); |
264 | skb_queue_head_init(&sta->tx_filtered); | |
73651ee6 | 265 | |
cccaec98 | 266 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 267 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 268 | |
73651ee6 | 269 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 270 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
271 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
272 | ||
03e4497e | 273 | #ifdef CONFIG_MAC80211_MESH |
b4e08ea1 | 274 | sta->plink_state = PLINK_LISTEN; |
03e4497e JB |
275 | init_timer(&sta->plink_timer); |
276 | #endif | |
277 | ||
73651ee6 JB |
278 | return sta; |
279 | } | |
280 | ||
34e89507 | 281 | static int sta_info_finish_insert(struct sta_info *sta, bool async) |
73651ee6 JB |
282 | { |
283 | struct ieee80211_local *local = sta->local; | |
284 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
98b62183 | 285 | struct station_info sinfo; |
73651ee6 | 286 | unsigned long flags; |
93e5deb1 | 287 | int err = 0; |
73651ee6 | 288 | |
46a5ebaf | 289 | lockdep_assert_held(&local->sta_mtx); |
34e89507 JB |
290 | |
291 | /* notify driver */ | |
292 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
293 | sdata = container_of(sdata->bss, | |
294 | struct ieee80211_sub_if_data, | |
295 | u.ap); | |
296 | err = drv_sta_add(local, sdata, &sta->sta); | |
297 | if (err) { | |
298 | if (!async) | |
299 | return err; | |
300 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to driver (%d)" | |
301 | " - keeping it anyway.\n", | |
302 | sdata->name, sta->sta.addr, err); | |
303 | } else { | |
304 | sta->uploaded = true; | |
305 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
306 | if (async) | |
0fb9a9ec JP |
307 | wiphy_debug(local->hw.wiphy, |
308 | "Finished adding IBSS STA %pM\n", | |
309 | sta->sta.addr); | |
34e89507 JB |
310 | #endif |
311 | } | |
312 | ||
313 | sdata = sta->sdata; | |
314 | ||
315 | if (!async) { | |
316 | local->num_sta++; | |
317 | local->sta_generation++; | |
318 | smp_mb(); | |
319 | ||
320 | /* make the station visible */ | |
321 | spin_lock_irqsave(&local->sta_lock, flags); | |
322 | sta_info_hash_add(local, sta); | |
323 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
324 | } | |
325 | ||
326 | list_add(&sta->list, &local->sta_list); | |
327 | ||
328 | ieee80211_sta_debugfs_add(sta); | |
329 | rate_control_add_sta_debugfs(sta); | |
330 | ||
331 | sinfo.filled = 0; | |
332 | sinfo.generation = local->sta_generation; | |
333 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
334 | ||
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static void sta_info_finish_pending(struct ieee80211_local *local) | |
340 | { | |
341 | struct sta_info *sta; | |
342 | unsigned long flags; | |
343 | ||
344 | spin_lock_irqsave(&local->sta_lock, flags); | |
345 | while (!list_empty(&local->sta_pending_list)) { | |
346 | sta = list_first_entry(&local->sta_pending_list, | |
347 | struct sta_info, list); | |
348 | list_del(&sta->list); | |
349 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
350 | ||
351 | sta_info_finish_insert(sta, true); | |
352 | ||
353 | spin_lock_irqsave(&local->sta_lock, flags); | |
354 | } | |
355 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
356 | } | |
357 | ||
358 | static void sta_info_finish_work(struct work_struct *work) | |
359 | { | |
360 | struct ieee80211_local *local = | |
361 | container_of(work, struct ieee80211_local, sta_finish_work); | |
362 | ||
363 | mutex_lock(&local->sta_mtx); | |
364 | sta_info_finish_pending(local); | |
365 | mutex_unlock(&local->sta_mtx); | |
366 | } | |
367 | ||
368 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
369 | { | |
370 | struct ieee80211_local *local = sta->local; | |
371 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
372 | unsigned long flags; | |
373 | int err = 0; | |
374 | ||
03e4497e JB |
375 | /* |
376 | * Can't be a WARN_ON because it can be triggered through a race: | |
377 | * something inserts a STA (on one CPU) without holding the RTNL | |
378 | * and another CPU turns off the net device. | |
379 | */ | |
9607e6b6 | 380 | if (unlikely(!ieee80211_sdata_running(sdata))) { |
93e5deb1 | 381 | err = -ENETDOWN; |
34e89507 | 382 | rcu_read_lock(); |
93e5deb1 JB |
383 | goto out_free; |
384 | } | |
03e4497e | 385 | |
47846c9b | 386 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
c6a1fa12 | 387 | is_multicast_ether_addr(sta->sta.addr))) { |
93e5deb1 | 388 | err = -EINVAL; |
34e89507 | 389 | rcu_read_lock(); |
93e5deb1 JB |
390 | goto out_free; |
391 | } | |
44213b5e | 392 | |
34e89507 JB |
393 | /* |
394 | * In ad-hoc mode, we sometimes need to insert stations | |
395 | * from tasklet context from the RX path. To avoid races, | |
396 | * always do so in that case -- see the comment below. | |
397 | */ | |
398 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
399 | spin_lock_irqsave(&local->sta_lock, flags); | |
400 | /* check if STA exists already */ | |
401 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
402 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
403 | rcu_read_lock(); | |
404 | err = -EEXIST; | |
405 | goto out_free; | |
406 | } | |
407 | ||
408 | local->num_sta++; | |
409 | local->sta_generation++; | |
410 | smp_mb(); | |
411 | sta_info_hash_add(local, sta); | |
412 | ||
413 | list_add_tail(&sta->list, &local->sta_pending_list); | |
414 | ||
415 | rcu_read_lock(); | |
416 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
417 | ||
418 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec JP |
419 | wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", |
420 | sta->sta.addr); | |
34e89507 JB |
421 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
422 | ||
423 | ieee80211_queue_work(&local->hw, &local->sta_finish_work); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | /* | |
429 | * On first glance, this will look racy, because the code | |
430 | * below this point, which inserts a station with sleeping, | |
431 | * unlocks the sta_lock between checking existence in the | |
432 | * hash table and inserting into it. | |
433 | * | |
434 | * However, it is not racy against itself because it keeps | |
435 | * the mutex locked. It still seems to race against the | |
436 | * above code that atomically inserts the station... That, | |
437 | * however, is not true because the above code can only | |
438 | * be invoked for IBSS interfaces, and the below code will | |
439 | * not be -- and the two do not race against each other as | |
440 | * the hash table also keys off the interface. | |
441 | */ | |
442 | ||
443 | might_sleep(); | |
444 | ||
445 | mutex_lock(&local->sta_mtx); | |
446 | ||
d0709a65 | 447 | spin_lock_irqsave(&local->sta_lock, flags); |
43ba7e95 | 448 | /* check if STA exists already */ |
34e89507 | 449 | if (sta_info_get_bss(sdata, sta->sta.addr)) { |
d0709a65 | 450 | spin_unlock_irqrestore(&local->sta_lock, flags); |
38a679a5 | 451 | mutex_unlock(&local->sta_mtx); |
34e89507 | 452 | rcu_read_lock(); |
93e5deb1 JB |
453 | err = -EEXIST; |
454 | goto out_free; | |
43ba7e95 | 455 | } |
32bfd35d | 456 | |
34e89507 | 457 | spin_unlock_irqrestore(&local->sta_lock, flags); |
32bfd35d | 458 | |
34e89507 JB |
459 | err = sta_info_finish_insert(sta, false); |
460 | if (err) { | |
461 | mutex_unlock(&local->sta_mtx); | |
462 | rcu_read_lock(); | |
463 | goto out_free; | |
32bfd35d | 464 | } |
d0709a65 | 465 | |
f0706e82 | 466 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 467 | wiphy_debug(local->hw.wiphy, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 JB |
468 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
469 | ||
34e89507 JB |
470 | /* move reference to rcu-protected */ |
471 | rcu_read_lock(); | |
472 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 473 | |
73651ee6 JB |
474 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
475 | mesh_accept_plinks_update(sdata); | |
476 | ||
477 | return 0; | |
93e5deb1 JB |
478 | out_free: |
479 | BUG_ON(!err); | |
480 | __sta_info_free(local, sta); | |
481 | return err; | |
f0706e82 JB |
482 | } |
483 | ||
34e89507 JB |
484 | int sta_info_insert(struct sta_info *sta) |
485 | { | |
486 | int err = sta_info_insert_rcu(sta); | |
487 | ||
488 | rcu_read_unlock(); | |
489 | ||
490 | return err; | |
491 | } | |
492 | ||
004c872e JB |
493 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
494 | { | |
495 | /* | |
496 | * This format has been mandated by the IEEE specifications, | |
497 | * so this line may not be changed to use the __set_bit() format. | |
498 | */ | |
499 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
500 | } | |
501 | ||
502 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
503 | { | |
504 | /* | |
505 | * This format has been mandated by the IEEE specifications, | |
506 | * so this line may not be changed to use the __clear_bit() format. | |
507 | */ | |
508 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
509 | } | |
510 | ||
511 | static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss, | |
512 | struct sta_info *sta) | |
513 | { | |
3e122be0 JB |
514 | BUG_ON(!bss); |
515 | ||
17741cdc | 516 | __bss_tim_set(bss, sta->sta.aid); |
3e122be0 | 517 | |
d0709a65 JB |
518 | if (sta->local->ops->set_tim) { |
519 | sta->local->tim_in_locked_section = true; | |
24487981 | 520 | drv_set_tim(sta->local, &sta->sta, true); |
d0709a65 JB |
521 | sta->local->tim_in_locked_section = false; |
522 | } | |
004c872e JB |
523 | } |
524 | ||
525 | void sta_info_set_tim_bit(struct sta_info *sta) | |
526 | { | |
d0709a65 | 527 | unsigned long flags; |
004c872e | 528 | |
3e122be0 JB |
529 | BUG_ON(!sta->sdata->bss); |
530 | ||
d0709a65 JB |
531 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
532 | __sta_info_set_tim_bit(sta->sdata->bss, sta); | |
533 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
534 | } |
535 | ||
536 | static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss, | |
537 | struct sta_info *sta) | |
538 | { | |
3e122be0 JB |
539 | BUG_ON(!bss); |
540 | ||
17741cdc | 541 | __bss_tim_clear(bss, sta->sta.aid); |
3e122be0 | 542 | |
d0709a65 JB |
543 | if (sta->local->ops->set_tim) { |
544 | sta->local->tim_in_locked_section = true; | |
24487981 | 545 | drv_set_tim(sta->local, &sta->sta, false); |
d0709a65 JB |
546 | sta->local->tim_in_locked_section = false; |
547 | } | |
004c872e JB |
548 | } |
549 | ||
550 | void sta_info_clear_tim_bit(struct sta_info *sta) | |
551 | { | |
d0709a65 | 552 | unsigned long flags; |
004c872e | 553 | |
3e122be0 JB |
554 | BUG_ON(!sta->sdata->bss); |
555 | ||
d0709a65 JB |
556 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
557 | __sta_info_clear_tim_bit(sta->sdata->bss, sta); | |
558 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
559 | } |
560 | ||
57c4d7b4 JB |
561 | static int sta_info_buffer_expired(struct sta_info *sta, |
562 | struct sk_buff *skb) | |
f0706e82 | 563 | { |
e039fa4a | 564 | struct ieee80211_tx_info *info; |
f0706e82 JB |
565 | int timeout; |
566 | ||
567 | if (!skb) | |
568 | return 0; | |
569 | ||
e039fa4a | 570 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
571 | |
572 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
573 | timeout = (sta->listen_interval * |
574 | sta->sdata->vif.bss_conf.beacon_int * | |
575 | 32 / 15625) * HZ; | |
f0706e82 JB |
576 | if (timeout < STA_TX_BUFFER_EXPIRE) |
577 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 578 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
579 | } |
580 | ||
581 | ||
3393a608 | 582 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, |
f0706e82 JB |
583 | struct sta_info *sta) |
584 | { | |
585 | unsigned long flags; | |
586 | struct sk_buff *skb; | |
836341a7 | 587 | struct ieee80211_sub_if_data *sdata; |
f0706e82 JB |
588 | |
589 | if (skb_queue_empty(&sta->ps_tx_buf)) | |
3393a608 | 590 | return false; |
f0706e82 JB |
591 | |
592 | for (;;) { | |
593 | spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); | |
594 | skb = skb_peek(&sta->ps_tx_buf); | |
57c4d7b4 | 595 | if (sta_info_buffer_expired(sta, skb)) |
f0706e82 | 596 | skb = __skb_dequeue(&sta->ps_tx_buf); |
836341a7 | 597 | else |
f0706e82 JB |
598 | skb = NULL; |
599 | spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); | |
600 | ||
836341a7 | 601 | if (!skb) |
f0706e82 | 602 | break; |
836341a7 | 603 | |
d0709a65 | 604 | sdata = sta->sdata; |
836341a7 | 605 | local->total_ps_buffered--; |
f4ea83dd | 606 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
607 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
608 | sta->sta.addr); | |
f4ea83dd | 609 | #endif |
836341a7 JB |
610 | dev_kfree_skb(skb); |
611 | ||
004c872e JB |
612 | if (skb_queue_empty(&sta->ps_tx_buf)) |
613 | sta_info_clear_tim_bit(sta); | |
f0706e82 | 614 | } |
3393a608 JO |
615 | |
616 | return true; | |
f0706e82 JB |
617 | } |
618 | ||
34e89507 | 619 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 620 | { |
34e89507 JB |
621 | struct ieee80211_local *local; |
622 | struct ieee80211_sub_if_data *sdata; | |
623 | struct sk_buff *skb; | |
624 | unsigned long flags; | |
e31b8213 | 625 | int ret, i; |
f0706e82 | 626 | |
34e89507 | 627 | might_sleep(); |
f0706e82 | 628 | |
34e89507 JB |
629 | if (!sta) |
630 | return -ENOENT; | |
5bb644a0 | 631 | |
34e89507 JB |
632 | local = sta->local; |
633 | sdata = sta->sdata; | |
f0706e82 | 634 | |
098a6070 JB |
635 | /* |
636 | * Before removing the station from the driver and | |
637 | * rate control, it might still start new aggregation | |
638 | * sessions -- block that to make sure the tear-down | |
639 | * will be sufficient. | |
640 | */ | |
641 | set_sta_flags(sta, WLAN_STA_BLOCK_BA); | |
53f73c09 | 642 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 643 | |
34e89507 JB |
644 | spin_lock_irqsave(&local->sta_lock, flags); |
645 | ret = sta_info_hash_del(local, sta); | |
646 | /* this might still be the pending list ... which is fine */ | |
647 | if (!ret) | |
648 | list_del(&sta->list); | |
649 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
650 | if (ret) | |
651 | return ret; | |
652 | ||
e31b8213 JB |
653 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
654 | ieee80211_key_free(local, sta->gtk[i]); | |
655 | if (sta->ptk) | |
656 | ieee80211_key_free(local, sta->ptk); | |
34e89507 JB |
657 | |
658 | sta->dead = true; | |
659 | ||
660 | if (test_and_clear_sta_flags(sta, | |
661 | WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) { | |
662 | BUG_ON(!sdata->bss); | |
663 | ||
664 | atomic_dec(&sdata->bss->num_sta_ps); | |
665 | __sta_info_clear_tim_bit(sdata->bss, sta); | |
666 | } | |
667 | ||
668 | local->num_sta--; | |
669 | local->sta_generation++; | |
670 | ||
671 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
672 | rcu_assign_pointer(sdata->u.vlan.sta, NULL); | |
673 | ||
674 | if (sta->uploaded) { | |
675 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
676 | sdata = container_of(sdata->bss, | |
677 | struct ieee80211_sub_if_data, | |
678 | u.ap); | |
679 | drv_sta_remove(local, sdata, &sta->sta); | |
680 | sdata = sta->sdata; | |
681 | } | |
682 | ||
e64b3795 JB |
683 | /* |
684 | * At this point, after we wait for an RCU grace period, | |
685 | * neither mac80211 nor the driver can reference this | |
686 | * sta struct any more except by still existing timers | |
687 | * associated with this station that we clean up below. | |
688 | */ | |
689 | synchronize_rcu(); | |
690 | ||
34e89507 | 691 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 692 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 693 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
694 | #endif |
695 | ||
696 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 697 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
698 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
699 | cancel_work_sync(&sta->drv_unblock_wk); | |
700 | ||
ec15e68b JM |
701 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
702 | ||
34e89507 JB |
703 | rate_control_remove_sta_debugfs(sta); |
704 | ieee80211_sta_debugfs_remove(sta); | |
705 | ||
706 | #ifdef CONFIG_MAC80211_MESH | |
707 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
708 | mesh_plink_deactivate(sta); | |
709 | del_timer_sync(&sta->plink_timer); | |
710 | } | |
711 | #endif | |
712 | ||
713 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
714 | local->total_ps_buffered--; | |
715 | dev_kfree_skb_any(skb); | |
716 | } | |
717 | ||
718 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) | |
719 | dev_kfree_skb_any(skb); | |
720 | ||
34e89507 JB |
721 | __sta_info_free(local, sta); |
722 | ||
723 | return 0; | |
4d6141c3 JS |
724 | } |
725 | ||
34e89507 | 726 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 727 | { |
34e89507 JB |
728 | struct sta_info *sta; |
729 | int ret; | |
4d6141c3 | 730 | |
34e89507 JB |
731 | mutex_lock(&sdata->local->sta_mtx); |
732 | sta = sta_info_get(sdata, addr); | |
733 | ret = __sta_info_destroy(sta); | |
734 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
735 | |
736 | return ret; | |
737 | } | |
738 | ||
34e89507 JB |
739 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
740 | const u8 *addr) | |
e9f207f0 | 741 | { |
34e89507 JB |
742 | struct sta_info *sta; |
743 | int ret; | |
e9f207f0 | 744 | |
34e89507 JB |
745 | mutex_lock(&sdata->local->sta_mtx); |
746 | sta = sta_info_get_bss(sdata, addr); | |
747 | ret = __sta_info_destroy(sta); | |
748 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 749 | |
34e89507 JB |
750 | return ret; |
751 | } | |
e9f207f0 | 752 | |
34e89507 JB |
753 | static void sta_info_cleanup(unsigned long data) |
754 | { | |
755 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
756 | struct sta_info *sta; | |
3393a608 | 757 | bool timer_needed = false; |
34e89507 JB |
758 | |
759 | rcu_read_lock(); | |
760 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
761 | if (sta_info_cleanup_expire_buffered(local, sta)) |
762 | timer_needed = true; | |
34e89507 | 763 | rcu_read_unlock(); |
e9f207f0 | 764 | |
34e89507 JB |
765 | if (local->quiescing) |
766 | return; | |
d0709a65 | 767 | |
3393a608 JO |
768 | if (!timer_needed) |
769 | return; | |
770 | ||
34e89507 JB |
771 | local->sta_cleanup.expires = |
772 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
773 | add_timer(&local->sta_cleanup); | |
e9f207f0 | 774 | } |
e9f207f0 | 775 | |
f0706e82 JB |
776 | void sta_info_init(struct ieee80211_local *local) |
777 | { | |
d0709a65 | 778 | spin_lock_init(&local->sta_lock); |
34e89507 | 779 | mutex_init(&local->sta_mtx); |
f0706e82 | 780 | INIT_LIST_HEAD(&local->sta_list); |
34e89507 JB |
781 | INIT_LIST_HEAD(&local->sta_pending_list); |
782 | INIT_WORK(&local->sta_finish_work, sta_info_finish_work); | |
f0706e82 | 783 | |
b24b8a24 PE |
784 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
785 | (unsigned long)local); | |
0d174406 JB |
786 | local->sta_cleanup.expires = |
787 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
f0706e82 JB |
788 | } |
789 | ||
790 | int sta_info_start(struct ieee80211_local *local) | |
791 | { | |
792 | add_timer(&local->sta_cleanup); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | void sta_info_stop(struct ieee80211_local *local) | |
797 | { | |
f0706e82 | 798 | del_timer(&local->sta_cleanup); |
be8755e1 | 799 | sta_info_flush(local, NULL); |
f0706e82 JB |
800 | } |
801 | ||
f0706e82 JB |
802 | /** |
803 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
804 | * |
805 | * Returns the number of removed STA entries. | |
806 | * | |
f0706e82 | 807 | * @local: local interface data |
d0709a65 | 808 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 809 | */ |
44213b5e | 810 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 811 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
812 | { |
813 | struct sta_info *sta, *tmp; | |
44213b5e | 814 | int ret = 0; |
f0706e82 | 815 | |
d0709a65 | 816 | might_sleep(); |
be8755e1 | 817 | |
34e89507 JB |
818 | mutex_lock(&local->sta_mtx); |
819 | ||
820 | sta_info_finish_pending(local); | |
821 | ||
d0709a65 | 822 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
823 | if (!sdata || sdata == sta->sdata) |
824 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 825 | } |
34e89507 | 826 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
827 | |
828 | return ret; | |
f0706e82 | 829 | } |
dc6676b7 | 830 | |
24723d1b JB |
831 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
832 | unsigned long exp_time) | |
833 | { | |
834 | struct ieee80211_local *local = sdata->local; | |
835 | struct sta_info *sta, *tmp; | |
24723d1b | 836 | |
34e89507 | 837 | mutex_lock(&local->sta_mtx); |
24723d1b JB |
838 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
839 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
840 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 841 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 842 | sdata->name, sta->sta.addr); |
24723d1b | 843 | #endif |
34e89507 | 844 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 845 | } |
34e89507 | 846 | mutex_unlock(&local->sta_mtx); |
24723d1b | 847 | } |
17741cdc | 848 | |
686b9cb9 BG |
849 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
850 | const u8 *addr, | |
851 | const u8 *localaddr) | |
17741cdc | 852 | { |
abe60632 | 853 | struct sta_info *sta, *nxt; |
17741cdc | 854 | |
686b9cb9 BG |
855 | /* |
856 | * Just return a random station if localaddr is NULL | |
857 | * ... first in list. | |
858 | */ | |
f7c65594 | 859 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
860 | if (localaddr && |
861 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
862 | continue; | |
f7c65594 JB |
863 | if (!sta->uploaded) |
864 | return NULL; | |
abe60632 | 865 | return &sta->sta; |
f7c65594 JB |
866 | } |
867 | ||
abe60632 | 868 | return NULL; |
17741cdc | 869 | } |
686b9cb9 | 870 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
871 | |
872 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
873 | const u8 *addr) | |
874 | { | |
f7c65594 | 875 | struct sta_info *sta; |
5ed176e1 JB |
876 | |
877 | if (!vif) | |
878 | return NULL; | |
879 | ||
f7c65594 JB |
880 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
881 | if (!sta) | |
882 | return NULL; | |
883 | ||
884 | if (!sta->uploaded) | |
885 | return NULL; | |
5ed176e1 | 886 | |
f7c65594 | 887 | return &sta->sta; |
5ed176e1 | 888 | } |
17741cdc | 889 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 890 | |
50a9432d JB |
891 | static void clear_sta_ps_flags(void *_sta) |
892 | { | |
893 | struct sta_info *sta = _sta; | |
894 | ||
895 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER | WLAN_STA_PS_STA); | |
896 | } | |
897 | ||
af818581 JB |
898 | /* powersave support code */ |
899 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
900 | { | |
901 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
902 | struct ieee80211_local *local = sdata->local; | |
903 | int sent, buffered; | |
904 | ||
d057e5a3 AN |
905 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
906 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 JB |
907 | |
908 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
909 | sta_info_clear_tim_bit(sta); | |
910 | ||
911 | /* Send all buffered frames to the station */ | |
912 | sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered); | |
50a9432d JB |
913 | buffered = ieee80211_add_pending_skbs_fn(local, &sta->ps_tx_buf, |
914 | clear_sta_ps_flags, sta); | |
af818581 JB |
915 | sent += buffered; |
916 | local->total_ps_buffered -= buffered; | |
917 | ||
918 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
919 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 920 | "since STA not sleeping anymore\n", sdata->name, |
af818581 JB |
921 | sta->sta.addr, sta->sta.aid, sent - buffered, buffered); |
922 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
923 | } | |
924 | ||
925 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) | |
926 | { | |
927 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
928 | struct ieee80211_local *local = sdata->local; | |
929 | struct sk_buff *skb; | |
930 | int no_pending_pkts; | |
931 | ||
932 | skb = skb_dequeue(&sta->tx_filtered); | |
933 | if (!skb) { | |
934 | skb = skb_dequeue(&sta->ps_tx_buf); | |
935 | if (skb) | |
936 | local->total_ps_buffered--; | |
937 | } | |
938 | no_pending_pkts = skb_queue_empty(&sta->tx_filtered) && | |
939 | skb_queue_empty(&sta->ps_tx_buf); | |
940 | ||
941 | if (skb) { | |
942 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
943 | struct ieee80211_hdr *hdr = | |
944 | (struct ieee80211_hdr *) skb->data; | |
945 | ||
946 | /* | |
947 | * Tell TX path to send this frame even though the STA may | |
948 | * still remain is PS mode after this frame exchange. | |
949 | */ | |
950 | info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE; | |
951 | ||
952 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
953 | printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n", | |
954 | sta->sta.addr, sta->sta.aid, | |
955 | skb_queue_len(&sta->ps_tx_buf)); | |
956 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
957 | ||
958 | /* Use MoreData flag to indicate whether there are more | |
959 | * buffered frames for this STA */ | |
960 | if (no_pending_pkts) | |
961 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
962 | else | |
963 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
964 | ||
965 | ieee80211_add_pending_skb(local, skb); | |
966 | ||
967 | if (no_pending_pkts) | |
968 | sta_info_clear_tim_bit(sta); | |
969 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
970 | } else { | |
971 | /* | |
972 | * FIXME: This can be the result of a race condition between | |
973 | * us expiring a frame and the station polling for it. | |
974 | * Should we send it a null-func frame indicating we | |
975 | * have nothing buffered for it? | |
976 | */ | |
977 | printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " | |
978 | "though there are no buffered frames for it\n", | |
47846c9b | 979 | sdata->name, sta->sta.addr); |
af818581 JB |
980 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
981 | } | |
982 | } | |
983 | ||
984 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, | |
985 | struct ieee80211_sta *pubsta, bool block) | |
986 | { | |
987 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
988 | ||
b5878a2d JB |
989 | trace_api_sta_block_awake(sta->local, pubsta, block); |
990 | ||
af818581 JB |
991 | if (block) |
992 | set_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
50a9432d | 993 | else if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) |
af818581 JB |
994 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
995 | } | |
996 | EXPORT_SYMBOL(ieee80211_sta_block_awake); |