]>
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" |
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; |
ebe27c91 | 231 | struct timespec uptime; |
16c5f15c | 232 | int i; |
f0706e82 | 233 | |
17741cdc | 234 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 235 | if (!sta) |
73651ee6 | 236 | return NULL; |
f0706e82 | 237 | |
07346f81 | 238 | spin_lock_init(&sta->lock); |
5a9f7b04 | 239 | spin_lock_init(&sta->flaglock); |
af818581 | 240 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 241 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 242 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 243 | |
17741cdc | 244 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
245 | sta->local = local; |
246 | sta->sdata = sdata; | |
8bc8aecd | 247 | sta->last_rx = jiffies; |
f0706e82 | 248 | |
ebe27c91 MSS |
249 | do_posix_clock_monotonic_gettime(&uptime); |
250 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
251 | ewma_init(&sta->avg_signal, 1024, 8); |
252 | ||
af65cd96 | 253 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 254 | kfree(sta); |
73651ee6 | 255 | return NULL; |
f0706e82 JB |
256 | } |
257 | ||
16c5f15c | 258 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
259 | /* |
260 | * timer_to_tid must be initialized with identity mapping | |
261 | * to enable session_timer's data differentiation. See | |
262 | * sta_rx_agg_session_timer_expired for usage. | |
263 | */ | |
16c5f15c | 264 | sta->timer_to_tid[i] = i; |
16c5f15c | 265 | } |
f0706e82 JB |
266 | skb_queue_head_init(&sta->ps_tx_buf); |
267 | skb_queue_head_init(&sta->tx_filtered); | |
73651ee6 | 268 | |
cccaec98 | 269 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 270 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 271 | |
73651ee6 | 272 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 273 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
274 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
275 | ||
03e4497e | 276 | #ifdef CONFIG_MAC80211_MESH |
b4e08ea1 | 277 | sta->plink_state = PLINK_LISTEN; |
03e4497e JB |
278 | init_timer(&sta->plink_timer); |
279 | #endif | |
280 | ||
73651ee6 JB |
281 | return sta; |
282 | } | |
283 | ||
34e89507 | 284 | static int sta_info_finish_insert(struct sta_info *sta, bool async) |
73651ee6 JB |
285 | { |
286 | struct ieee80211_local *local = sta->local; | |
287 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
98b62183 | 288 | struct station_info sinfo; |
73651ee6 | 289 | unsigned long flags; |
93e5deb1 | 290 | int err = 0; |
73651ee6 | 291 | |
46a5ebaf | 292 | lockdep_assert_held(&local->sta_mtx); |
34e89507 JB |
293 | |
294 | /* notify driver */ | |
295 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
296 | sdata = container_of(sdata->bss, | |
297 | struct ieee80211_sub_if_data, | |
298 | u.ap); | |
299 | err = drv_sta_add(local, sdata, &sta->sta); | |
300 | if (err) { | |
301 | if (!async) | |
302 | return err; | |
303 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to driver (%d)" | |
304 | " - keeping it anyway.\n", | |
305 | sdata->name, sta->sta.addr, err); | |
306 | } else { | |
307 | sta->uploaded = true; | |
308 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
309 | if (async) | |
0fb9a9ec JP |
310 | wiphy_debug(local->hw.wiphy, |
311 | "Finished adding IBSS STA %pM\n", | |
312 | sta->sta.addr); | |
34e89507 JB |
313 | #endif |
314 | } | |
315 | ||
316 | sdata = sta->sdata; | |
317 | ||
318 | if (!async) { | |
319 | local->num_sta++; | |
320 | local->sta_generation++; | |
321 | smp_mb(); | |
322 | ||
323 | /* make the station visible */ | |
324 | spin_lock_irqsave(&local->sta_lock, flags); | |
325 | sta_info_hash_add(local, sta); | |
326 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
327 | } | |
328 | ||
329 | list_add(&sta->list, &local->sta_list); | |
330 | ||
331 | ieee80211_sta_debugfs_add(sta); | |
332 | rate_control_add_sta_debugfs(sta); | |
333 | ||
334 | sinfo.filled = 0; | |
335 | sinfo.generation = local->sta_generation; | |
336 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
337 | ||
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static void sta_info_finish_pending(struct ieee80211_local *local) | |
343 | { | |
344 | struct sta_info *sta; | |
345 | unsigned long flags; | |
346 | ||
347 | spin_lock_irqsave(&local->sta_lock, flags); | |
348 | while (!list_empty(&local->sta_pending_list)) { | |
349 | sta = list_first_entry(&local->sta_pending_list, | |
350 | struct sta_info, list); | |
351 | list_del(&sta->list); | |
352 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
353 | ||
354 | sta_info_finish_insert(sta, true); | |
355 | ||
356 | spin_lock_irqsave(&local->sta_lock, flags); | |
357 | } | |
358 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
359 | } | |
360 | ||
361 | static void sta_info_finish_work(struct work_struct *work) | |
362 | { | |
363 | struct ieee80211_local *local = | |
364 | container_of(work, struct ieee80211_local, sta_finish_work); | |
365 | ||
366 | mutex_lock(&local->sta_mtx); | |
367 | sta_info_finish_pending(local); | |
368 | mutex_unlock(&local->sta_mtx); | |
369 | } | |
370 | ||
371 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
372 | { | |
373 | struct ieee80211_local *local = sta->local; | |
374 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
375 | unsigned long flags; | |
376 | int err = 0; | |
377 | ||
03e4497e JB |
378 | /* |
379 | * Can't be a WARN_ON because it can be triggered through a race: | |
380 | * something inserts a STA (on one CPU) without holding the RTNL | |
381 | * and another CPU turns off the net device. | |
382 | */ | |
9607e6b6 | 383 | if (unlikely(!ieee80211_sdata_running(sdata))) { |
93e5deb1 | 384 | err = -ENETDOWN; |
34e89507 | 385 | rcu_read_lock(); |
93e5deb1 JB |
386 | goto out_free; |
387 | } | |
03e4497e | 388 | |
47846c9b | 389 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
c6a1fa12 | 390 | is_multicast_ether_addr(sta->sta.addr))) { |
93e5deb1 | 391 | err = -EINVAL; |
34e89507 | 392 | rcu_read_lock(); |
93e5deb1 JB |
393 | goto out_free; |
394 | } | |
44213b5e | 395 | |
34e89507 JB |
396 | /* |
397 | * In ad-hoc mode, we sometimes need to insert stations | |
398 | * from tasklet context from the RX path. To avoid races, | |
399 | * always do so in that case -- see the comment below. | |
400 | */ | |
401 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
402 | spin_lock_irqsave(&local->sta_lock, flags); | |
403 | /* check if STA exists already */ | |
404 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
405 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
406 | rcu_read_lock(); | |
407 | err = -EEXIST; | |
408 | goto out_free; | |
409 | } | |
410 | ||
411 | local->num_sta++; | |
412 | local->sta_generation++; | |
413 | smp_mb(); | |
414 | sta_info_hash_add(local, sta); | |
415 | ||
416 | list_add_tail(&sta->list, &local->sta_pending_list); | |
417 | ||
418 | rcu_read_lock(); | |
419 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
420 | ||
421 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec JP |
422 | wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", |
423 | sta->sta.addr); | |
34e89507 JB |
424 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
425 | ||
426 | ieee80211_queue_work(&local->hw, &local->sta_finish_work); | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | /* | |
432 | * On first glance, this will look racy, because the code | |
433 | * below this point, which inserts a station with sleeping, | |
434 | * unlocks the sta_lock between checking existence in the | |
435 | * hash table and inserting into it. | |
436 | * | |
437 | * However, it is not racy against itself because it keeps | |
438 | * the mutex locked. It still seems to race against the | |
439 | * above code that atomically inserts the station... That, | |
440 | * however, is not true because the above code can only | |
441 | * be invoked for IBSS interfaces, and the below code will | |
442 | * not be -- and the two do not race against each other as | |
443 | * the hash table also keys off the interface. | |
444 | */ | |
445 | ||
446 | might_sleep(); | |
447 | ||
448 | mutex_lock(&local->sta_mtx); | |
449 | ||
d0709a65 | 450 | spin_lock_irqsave(&local->sta_lock, flags); |
43ba7e95 | 451 | /* check if STA exists already */ |
34e89507 | 452 | if (sta_info_get_bss(sdata, sta->sta.addr)) { |
d0709a65 | 453 | spin_unlock_irqrestore(&local->sta_lock, flags); |
38a679a5 | 454 | mutex_unlock(&local->sta_mtx); |
34e89507 | 455 | rcu_read_lock(); |
93e5deb1 JB |
456 | err = -EEXIST; |
457 | goto out_free; | |
43ba7e95 | 458 | } |
32bfd35d | 459 | |
34e89507 | 460 | spin_unlock_irqrestore(&local->sta_lock, flags); |
32bfd35d | 461 | |
34e89507 JB |
462 | err = sta_info_finish_insert(sta, false); |
463 | if (err) { | |
464 | mutex_unlock(&local->sta_mtx); | |
465 | rcu_read_lock(); | |
466 | goto out_free; | |
32bfd35d | 467 | } |
d0709a65 | 468 | |
f0706e82 | 469 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 470 | wiphy_debug(local->hw.wiphy, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 JB |
471 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
472 | ||
34e89507 JB |
473 | /* move reference to rcu-protected */ |
474 | rcu_read_lock(); | |
475 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 476 | |
73651ee6 JB |
477 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
478 | mesh_accept_plinks_update(sdata); | |
479 | ||
480 | return 0; | |
93e5deb1 JB |
481 | out_free: |
482 | BUG_ON(!err); | |
483 | __sta_info_free(local, sta); | |
484 | return err; | |
f0706e82 JB |
485 | } |
486 | ||
34e89507 JB |
487 | int sta_info_insert(struct sta_info *sta) |
488 | { | |
489 | int err = sta_info_insert_rcu(sta); | |
490 | ||
491 | rcu_read_unlock(); | |
492 | ||
493 | return err; | |
494 | } | |
495 | ||
004c872e JB |
496 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
497 | { | |
498 | /* | |
499 | * This format has been mandated by the IEEE specifications, | |
500 | * so this line may not be changed to use the __set_bit() format. | |
501 | */ | |
502 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
503 | } | |
504 | ||
505 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
506 | { | |
507 | /* | |
508 | * This format has been mandated by the IEEE specifications, | |
509 | * so this line may not be changed to use the __clear_bit() format. | |
510 | */ | |
511 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
512 | } | |
513 | ||
514 | static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss, | |
515 | struct sta_info *sta) | |
516 | { | |
3e122be0 JB |
517 | BUG_ON(!bss); |
518 | ||
17741cdc | 519 | __bss_tim_set(bss, sta->sta.aid); |
3e122be0 | 520 | |
d0709a65 JB |
521 | if (sta->local->ops->set_tim) { |
522 | sta->local->tim_in_locked_section = true; | |
24487981 | 523 | drv_set_tim(sta->local, &sta->sta, true); |
d0709a65 JB |
524 | sta->local->tim_in_locked_section = false; |
525 | } | |
004c872e JB |
526 | } |
527 | ||
528 | void sta_info_set_tim_bit(struct sta_info *sta) | |
529 | { | |
d0709a65 | 530 | unsigned long flags; |
004c872e | 531 | |
3e122be0 JB |
532 | BUG_ON(!sta->sdata->bss); |
533 | ||
d0709a65 JB |
534 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
535 | __sta_info_set_tim_bit(sta->sdata->bss, sta); | |
536 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
537 | } |
538 | ||
539 | static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss, | |
540 | struct sta_info *sta) | |
541 | { | |
3e122be0 JB |
542 | BUG_ON(!bss); |
543 | ||
17741cdc | 544 | __bss_tim_clear(bss, sta->sta.aid); |
3e122be0 | 545 | |
d0709a65 JB |
546 | if (sta->local->ops->set_tim) { |
547 | sta->local->tim_in_locked_section = true; | |
24487981 | 548 | drv_set_tim(sta->local, &sta->sta, false); |
d0709a65 JB |
549 | sta->local->tim_in_locked_section = false; |
550 | } | |
004c872e JB |
551 | } |
552 | ||
553 | void sta_info_clear_tim_bit(struct sta_info *sta) | |
554 | { | |
d0709a65 | 555 | unsigned long flags; |
004c872e | 556 | |
3e122be0 JB |
557 | BUG_ON(!sta->sdata->bss); |
558 | ||
d0709a65 JB |
559 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
560 | __sta_info_clear_tim_bit(sta->sdata->bss, sta); | |
561 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
562 | } |
563 | ||
57c4d7b4 JB |
564 | static int sta_info_buffer_expired(struct sta_info *sta, |
565 | struct sk_buff *skb) | |
f0706e82 | 566 | { |
e039fa4a | 567 | struct ieee80211_tx_info *info; |
f0706e82 JB |
568 | int timeout; |
569 | ||
570 | if (!skb) | |
571 | return 0; | |
572 | ||
e039fa4a | 573 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
574 | |
575 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
576 | timeout = (sta->listen_interval * |
577 | sta->sdata->vif.bss_conf.beacon_int * | |
578 | 32 / 15625) * HZ; | |
f0706e82 JB |
579 | if (timeout < STA_TX_BUFFER_EXPIRE) |
580 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 581 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
582 | } |
583 | ||
584 | ||
3393a608 | 585 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, |
f0706e82 JB |
586 | struct sta_info *sta) |
587 | { | |
588 | unsigned long flags; | |
589 | struct sk_buff *skb; | |
836341a7 | 590 | struct ieee80211_sub_if_data *sdata; |
f0706e82 JB |
591 | |
592 | if (skb_queue_empty(&sta->ps_tx_buf)) | |
3393a608 | 593 | return false; |
f0706e82 JB |
594 | |
595 | for (;;) { | |
596 | spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); | |
597 | skb = skb_peek(&sta->ps_tx_buf); | |
57c4d7b4 | 598 | if (sta_info_buffer_expired(sta, skb)) |
f0706e82 | 599 | skb = __skb_dequeue(&sta->ps_tx_buf); |
836341a7 | 600 | else |
f0706e82 JB |
601 | skb = NULL; |
602 | spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); | |
603 | ||
836341a7 | 604 | if (!skb) |
f0706e82 | 605 | break; |
836341a7 | 606 | |
d0709a65 | 607 | sdata = sta->sdata; |
836341a7 | 608 | local->total_ps_buffered--; |
f4ea83dd | 609 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
610 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
611 | sta->sta.addr); | |
f4ea83dd | 612 | #endif |
836341a7 JB |
613 | dev_kfree_skb(skb); |
614 | ||
004c872e JB |
615 | if (skb_queue_empty(&sta->ps_tx_buf)) |
616 | sta_info_clear_tim_bit(sta); | |
f0706e82 | 617 | } |
3393a608 JO |
618 | |
619 | return true; | |
f0706e82 JB |
620 | } |
621 | ||
34e89507 | 622 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 623 | { |
34e89507 JB |
624 | struct ieee80211_local *local; |
625 | struct ieee80211_sub_if_data *sdata; | |
626 | struct sk_buff *skb; | |
627 | unsigned long flags; | |
e31b8213 | 628 | int ret, i; |
f0706e82 | 629 | |
34e89507 | 630 | might_sleep(); |
f0706e82 | 631 | |
34e89507 JB |
632 | if (!sta) |
633 | return -ENOENT; | |
5bb644a0 | 634 | |
34e89507 JB |
635 | local = sta->local; |
636 | sdata = sta->sdata; | |
f0706e82 | 637 | |
098a6070 JB |
638 | /* |
639 | * Before removing the station from the driver and | |
640 | * rate control, it might still start new aggregation | |
641 | * sessions -- block that to make sure the tear-down | |
642 | * will be sufficient. | |
643 | */ | |
644 | set_sta_flags(sta, WLAN_STA_BLOCK_BA); | |
53f73c09 | 645 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 646 | |
34e89507 JB |
647 | spin_lock_irqsave(&local->sta_lock, flags); |
648 | ret = sta_info_hash_del(local, sta); | |
649 | /* this might still be the pending list ... which is fine */ | |
650 | if (!ret) | |
651 | list_del(&sta->list); | |
652 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
653 | if (ret) | |
654 | return ret; | |
655 | ||
e31b8213 JB |
656 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
657 | ieee80211_key_free(local, sta->gtk[i]); | |
658 | if (sta->ptk) | |
659 | ieee80211_key_free(local, sta->ptk); | |
34e89507 JB |
660 | |
661 | sta->dead = true; | |
662 | ||
663 | if (test_and_clear_sta_flags(sta, | |
664 | WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) { | |
665 | BUG_ON(!sdata->bss); | |
666 | ||
667 | atomic_dec(&sdata->bss->num_sta_ps); | |
668 | __sta_info_clear_tim_bit(sdata->bss, sta); | |
669 | } | |
670 | ||
671 | local->num_sta--; | |
672 | local->sta_generation++; | |
673 | ||
674 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
675 | rcu_assign_pointer(sdata->u.vlan.sta, NULL); | |
676 | ||
677 | if (sta->uploaded) { | |
678 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
679 | sdata = container_of(sdata->bss, | |
680 | struct ieee80211_sub_if_data, | |
681 | u.ap); | |
682 | drv_sta_remove(local, sdata, &sta->sta); | |
683 | sdata = sta->sdata; | |
684 | } | |
685 | ||
e64b3795 JB |
686 | /* |
687 | * At this point, after we wait for an RCU grace period, | |
688 | * neither mac80211 nor the driver can reference this | |
689 | * sta struct any more except by still existing timers | |
690 | * associated with this station that we clean up below. | |
691 | */ | |
692 | synchronize_rcu(); | |
693 | ||
34e89507 | 694 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 695 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 696 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
697 | #endif |
698 | ||
699 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 700 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
701 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
702 | cancel_work_sync(&sta->drv_unblock_wk); | |
703 | ||
ec15e68b JM |
704 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
705 | ||
34e89507 JB |
706 | rate_control_remove_sta_debugfs(sta); |
707 | ieee80211_sta_debugfs_remove(sta); | |
708 | ||
709 | #ifdef CONFIG_MAC80211_MESH | |
710 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
711 | mesh_plink_deactivate(sta); | |
712 | del_timer_sync(&sta->plink_timer); | |
713 | } | |
714 | #endif | |
715 | ||
716 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
717 | local->total_ps_buffered--; | |
718 | dev_kfree_skb_any(skb); | |
719 | } | |
720 | ||
721 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) | |
722 | dev_kfree_skb_any(skb); | |
723 | ||
34e89507 JB |
724 | __sta_info_free(local, sta); |
725 | ||
726 | return 0; | |
4d6141c3 JS |
727 | } |
728 | ||
34e89507 | 729 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 730 | { |
34e89507 JB |
731 | struct sta_info *sta; |
732 | int ret; | |
4d6141c3 | 733 | |
34e89507 JB |
734 | mutex_lock(&sdata->local->sta_mtx); |
735 | sta = sta_info_get(sdata, addr); | |
736 | ret = __sta_info_destroy(sta); | |
737 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
738 | |
739 | return ret; | |
740 | } | |
741 | ||
34e89507 JB |
742 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
743 | const u8 *addr) | |
e9f207f0 | 744 | { |
34e89507 JB |
745 | struct sta_info *sta; |
746 | int ret; | |
e9f207f0 | 747 | |
34e89507 JB |
748 | mutex_lock(&sdata->local->sta_mtx); |
749 | sta = sta_info_get_bss(sdata, addr); | |
750 | ret = __sta_info_destroy(sta); | |
751 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 752 | |
34e89507 JB |
753 | return ret; |
754 | } | |
e9f207f0 | 755 | |
34e89507 JB |
756 | static void sta_info_cleanup(unsigned long data) |
757 | { | |
758 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
759 | struct sta_info *sta; | |
3393a608 | 760 | bool timer_needed = false; |
34e89507 JB |
761 | |
762 | rcu_read_lock(); | |
763 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
764 | if (sta_info_cleanup_expire_buffered(local, sta)) |
765 | timer_needed = true; | |
34e89507 | 766 | rcu_read_unlock(); |
e9f207f0 | 767 | |
34e89507 JB |
768 | if (local->quiescing) |
769 | return; | |
d0709a65 | 770 | |
3393a608 JO |
771 | if (!timer_needed) |
772 | return; | |
773 | ||
26d59535 JB |
774 | mod_timer(&local->sta_cleanup, |
775 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 776 | } |
e9f207f0 | 777 | |
f0706e82 JB |
778 | void sta_info_init(struct ieee80211_local *local) |
779 | { | |
d0709a65 | 780 | spin_lock_init(&local->sta_lock); |
34e89507 | 781 | mutex_init(&local->sta_mtx); |
f0706e82 | 782 | INIT_LIST_HEAD(&local->sta_list); |
34e89507 JB |
783 | INIT_LIST_HEAD(&local->sta_pending_list); |
784 | INIT_WORK(&local->sta_finish_work, sta_info_finish_work); | |
f0706e82 | 785 | |
b24b8a24 PE |
786 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
787 | (unsigned long)local); | |
f0706e82 JB |
788 | } |
789 | ||
790 | void sta_info_stop(struct ieee80211_local *local) | |
791 | { | |
f0706e82 | 792 | del_timer(&local->sta_cleanup); |
be8755e1 | 793 | sta_info_flush(local, NULL); |
f0706e82 JB |
794 | } |
795 | ||
f0706e82 JB |
796 | /** |
797 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
798 | * |
799 | * Returns the number of removed STA entries. | |
800 | * | |
f0706e82 | 801 | * @local: local interface data |
d0709a65 | 802 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 803 | */ |
44213b5e | 804 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 805 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
806 | { |
807 | struct sta_info *sta, *tmp; | |
44213b5e | 808 | int ret = 0; |
f0706e82 | 809 | |
d0709a65 | 810 | might_sleep(); |
be8755e1 | 811 | |
34e89507 JB |
812 | mutex_lock(&local->sta_mtx); |
813 | ||
814 | sta_info_finish_pending(local); | |
815 | ||
d0709a65 | 816 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
817 | if (!sdata || sdata == sta->sdata) |
818 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 819 | } |
34e89507 | 820 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
821 | |
822 | return ret; | |
f0706e82 | 823 | } |
dc6676b7 | 824 | |
24723d1b JB |
825 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
826 | unsigned long exp_time) | |
827 | { | |
828 | struct ieee80211_local *local = sdata->local; | |
829 | struct sta_info *sta, *tmp; | |
24723d1b | 830 | |
34e89507 | 831 | mutex_lock(&local->sta_mtx); |
24723d1b JB |
832 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
833 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
834 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 835 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 836 | sdata->name, sta->sta.addr); |
24723d1b | 837 | #endif |
34e89507 | 838 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 839 | } |
34e89507 | 840 | mutex_unlock(&local->sta_mtx); |
24723d1b | 841 | } |
17741cdc | 842 | |
686b9cb9 BG |
843 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
844 | const u8 *addr, | |
845 | const u8 *localaddr) | |
17741cdc | 846 | { |
abe60632 | 847 | struct sta_info *sta, *nxt; |
17741cdc | 848 | |
686b9cb9 BG |
849 | /* |
850 | * Just return a random station if localaddr is NULL | |
851 | * ... first in list. | |
852 | */ | |
f7c65594 | 853 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
854 | if (localaddr && |
855 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
856 | continue; | |
f7c65594 JB |
857 | if (!sta->uploaded) |
858 | return NULL; | |
abe60632 | 859 | return &sta->sta; |
f7c65594 JB |
860 | } |
861 | ||
abe60632 | 862 | return NULL; |
17741cdc | 863 | } |
686b9cb9 | 864 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
865 | |
866 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
867 | const u8 *addr) | |
868 | { | |
f7c65594 | 869 | struct sta_info *sta; |
5ed176e1 JB |
870 | |
871 | if (!vif) | |
872 | return NULL; | |
873 | ||
f7c65594 JB |
874 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
875 | if (!sta) | |
876 | return NULL; | |
877 | ||
878 | if (!sta->uploaded) | |
879 | return NULL; | |
5ed176e1 | 880 | |
f7c65594 | 881 | return &sta->sta; |
5ed176e1 | 882 | } |
17741cdc | 883 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 884 | |
50a9432d JB |
885 | static void clear_sta_ps_flags(void *_sta) |
886 | { | |
887 | struct sta_info *sta = _sta; | |
888 | ||
889 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER | WLAN_STA_PS_STA); | |
890 | } | |
891 | ||
af818581 JB |
892 | /* powersave support code */ |
893 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
894 | { | |
895 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
896 | struct ieee80211_local *local = sdata->local; | |
897 | int sent, buffered; | |
898 | ||
d057e5a3 AN |
899 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
900 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 JB |
901 | |
902 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
903 | sta_info_clear_tim_bit(sta); | |
904 | ||
905 | /* Send all buffered frames to the station */ | |
906 | sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered); | |
50a9432d JB |
907 | buffered = ieee80211_add_pending_skbs_fn(local, &sta->ps_tx_buf, |
908 | clear_sta_ps_flags, sta); | |
af818581 JB |
909 | sent += buffered; |
910 | local->total_ps_buffered -= buffered; | |
911 | ||
912 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
913 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 914 | "since STA not sleeping anymore\n", sdata->name, |
af818581 JB |
915 | sta->sta.addr, sta->sta.aid, sent - buffered, buffered); |
916 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
917 | } | |
918 | ||
919 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) | |
920 | { | |
921 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
922 | struct ieee80211_local *local = sdata->local; | |
923 | struct sk_buff *skb; | |
924 | int no_pending_pkts; | |
925 | ||
926 | skb = skb_dequeue(&sta->tx_filtered); | |
927 | if (!skb) { | |
928 | skb = skb_dequeue(&sta->ps_tx_buf); | |
929 | if (skb) | |
930 | local->total_ps_buffered--; | |
931 | } | |
932 | no_pending_pkts = skb_queue_empty(&sta->tx_filtered) && | |
933 | skb_queue_empty(&sta->ps_tx_buf); | |
934 | ||
935 | if (skb) { | |
936 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
937 | struct ieee80211_hdr *hdr = | |
938 | (struct ieee80211_hdr *) skb->data; | |
939 | ||
940 | /* | |
941 | * Tell TX path to send this frame even though the STA may | |
942 | * still remain is PS mode after this frame exchange. | |
943 | */ | |
944 | info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE; | |
945 | ||
946 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
947 | printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n", | |
948 | sta->sta.addr, sta->sta.aid, | |
949 | skb_queue_len(&sta->ps_tx_buf)); | |
950 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
951 | ||
952 | /* Use MoreData flag to indicate whether there are more | |
953 | * buffered frames for this STA */ | |
954 | if (no_pending_pkts) | |
955 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
956 | else | |
957 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
958 | ||
959 | ieee80211_add_pending_skb(local, skb); | |
960 | ||
961 | if (no_pending_pkts) | |
962 | sta_info_clear_tim_bit(sta); | |
963 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
964 | } else { | |
965 | /* | |
966 | * FIXME: This can be the result of a race condition between | |
967 | * us expiring a frame and the station polling for it. | |
968 | * Should we send it a null-func frame indicating we | |
969 | * have nothing buffered for it? | |
970 | */ | |
971 | printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " | |
972 | "though there are no buffered frames for it\n", | |
47846c9b | 973 | sdata->name, sta->sta.addr); |
af818581 JB |
974 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
975 | } | |
976 | } | |
977 | ||
978 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, | |
979 | struct ieee80211_sta *pubsta, bool block) | |
980 | { | |
981 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
982 | ||
b5878a2d JB |
983 | trace_api_sta_block_awake(sta->local, pubsta, block); |
984 | ||
af818581 JB |
985 | if (block) |
986 | set_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
50a9432d | 987 | else if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) |
af818581 JB |
988 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
989 | } | |
990 | EXPORT_SYMBOL(ieee80211_sta_block_awake); |