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 | * | |
03e4497e JB |
35 | * Upon allocating a STA info structure with sta_info_alloc(), the caller owns |
36 | * that structure. It must then either destroy it using sta_info_destroy() | |
37 | * (which is pretty useless) or insert it into the hash table using | |
38 | * sta_info_insert() which demotes the reference from ownership to a regular | |
39 | * RCU-protected reference; if the function is called without protection by an | |
93e5deb1 JB |
40 | * RCU critical section the reference is instantly invalidated. Note that the |
41 | * caller may not do much with the STA info before inserting it, in particular, | |
42 | * it may not start any mesh peer link management or add encryption keys. | |
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 | * |
7e189a12 LR |
47 | * sta entries are added by mac80211 when you establish a link with a |
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 | |
51 | * we receive a probe response or a beacon from target IBSS network. For | |
52 | * WDS we add the sta for the peer imediately upon device open. When using | |
53 | * AP mode we add stations for each respective station upon request from | |
54 | * userspace through nl80211. | |
55 | * | |
d0709a65 JB |
56 | * Because there are debugfs entries for each station, and adding those |
57 | * must be able to sleep, it is also possible to "pin" a station entry, | |
58 | * that means it can be removed from the hash table but not be freed. | |
93e5deb1 JB |
59 | * See the comment in __sta_info_unlink() for more information, this is |
60 | * an internal capability only. | |
d0709a65 JB |
61 | * |
62 | * In order to remove a STA info structure, the caller needs to first | |
dbbea671 | 63 | * unlink it (sta_info_unlink()) from the list and hash tables and |
3b96766f JB |
64 | * then destroy it; sta_info_destroy() will wait for an RCU grace period |
65 | * to elapse before actually freeing it. Due to the pinning and the | |
66 | * possibility of multiple callers trying to remove the same STA info at | |
67 | * the same time, sta_info_unlink() can clear the STA info pointer it is | |
68 | * passed to indicate that the STA info is owned by somebody else now. | |
d0709a65 | 69 | * |
dbbea671 | 70 | * If sta_info_unlink() did not clear the pointer then the caller owns |
d0709a65 | 71 | * the STA info structure now and is responsible of destroying it with |
3b96766f | 72 | * a call to sta_info_destroy(). |
d0709a65 JB |
73 | * |
74 | * In all other cases, there is no concept of ownership on a STA entry, | |
75 | * each structure is owned by the global hash table/list until it is | |
76 | * removed. All users of the structure need to be RCU protected so that | |
77 | * the structure won't be freed before they are done using it. | |
78 | */ | |
f0706e82 JB |
79 | |
80 | /* Caller must hold local->sta_lock */ | |
be8755e1 MW |
81 | static int sta_info_hash_del(struct ieee80211_local *local, |
82 | struct sta_info *sta) | |
f0706e82 JB |
83 | { |
84 | struct sta_info *s; | |
85 | ||
17741cdc | 86 | s = local->sta_hash[STA_HASH(sta->sta.addr)]; |
f0706e82 | 87 | if (!s) |
be8755e1 MW |
88 | return -ENOENT; |
89 | if (s == sta) { | |
17741cdc | 90 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 91 | s->hnext); |
be8755e1 | 92 | return 0; |
f0706e82 JB |
93 | } |
94 | ||
be8755e1 | 95 | while (s->hnext && s->hnext != sta) |
f0706e82 | 96 | s = s->hnext; |
be8755e1 | 97 | if (s->hnext) { |
d0709a65 | 98 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
99 | return 0; |
100 | } | |
f0706e82 | 101 | |
be8755e1 | 102 | return -ENOENT; |
f0706e82 JB |
103 | } |
104 | ||
d0709a65 | 105 | /* protected by RCU */ |
abe60632 JB |
106 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
107 | const u8 *addr) | |
f0706e82 | 108 | { |
abe60632 | 109 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
110 | struct sta_info *sta; |
111 | ||
d0709a65 | 112 | sta = rcu_dereference(local->sta_hash[STA_HASH(addr)]); |
f0706e82 | 113 | while (sta) { |
abe60632 JB |
114 | if (sta->sdata == sdata && |
115 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 116 | break; |
d0709a65 | 117 | sta = rcu_dereference(sta->hnext); |
f0706e82 | 118 | } |
43ba7e95 JB |
119 | return sta; |
120 | } | |
121 | ||
3b53fde8 JB |
122 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
123 | int idx) | |
ee385855 | 124 | { |
3b53fde8 | 125 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
126 | struct sta_info *sta; |
127 | int i = 0; | |
128 | ||
d0709a65 | 129 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 130 | if (sdata != sta->sdata) |
2a8ca29a | 131 | continue; |
ee385855 LCC |
132 | if (i < idx) { |
133 | ++i; | |
134 | continue; | |
ee385855 | 135 | } |
2a8ca29a | 136 | return sta; |
ee385855 | 137 | } |
ee385855 LCC |
138 | |
139 | return NULL; | |
140 | } | |
f0706e82 | 141 | |
93e5deb1 JB |
142 | /** |
143 | * __sta_info_free - internal STA free helper | |
144 | * | |
6ef307bc | 145 | * @local: pointer to the global information |
93e5deb1 JB |
146 | * @sta: STA info to free |
147 | * | |
148 | * This function must undo everything done by sta_info_alloc() | |
149 | * that may happen before sta_info_insert(). | |
150 | */ | |
151 | static void __sta_info_free(struct ieee80211_local *local, | |
152 | struct sta_info *sta) | |
153 | { | |
af65cd96 JB |
154 | if (sta->rate_ctrl) { |
155 | rate_control_free_sta(sta); | |
156 | rate_control_put(sta->rate_ctrl); | |
157 | } | |
93e5deb1 JB |
158 | |
159 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0c68ae26 JB |
160 | printk(KERN_DEBUG "%s: Destroyed STA %pM\n", |
161 | wiphy_name(local->hw.wiphy), sta->sta.addr); | |
93e5deb1 JB |
162 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
163 | ||
164 | kfree(sta); | |
165 | } | |
166 | ||
d0709a65 | 167 | void sta_info_destroy(struct sta_info *sta) |
f0706e82 | 168 | { |
97bff8ec | 169 | struct ieee80211_local *local; |
f0706e82 | 170 | struct sk_buff *skb; |
07db2183 | 171 | int i; |
73651ee6 | 172 | |
97bff8ec JB |
173 | might_sleep(); |
174 | ||
73651ee6 JB |
175 | if (!sta) |
176 | return; | |
f0706e82 | 177 | |
97bff8ec | 178 | local = sta->local; |
d0709a65 | 179 | |
af818581 JB |
180 | cancel_work_sync(&sta->drv_unblock_wk); |
181 | ||
d0709a65 JB |
182 | rate_control_remove_sta_debugfs(sta); |
183 | ieee80211_sta_debugfs_remove(sta); | |
184 | ||
185 | #ifdef CONFIG_MAC80211_MESH | |
186 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
187 | mesh_plink_deactivate(sta); | |
188 | #endif | |
189 | ||
3b96766f JB |
190 | /* |
191 | * We have only unlinked the key, and actually destroying it | |
192 | * may mean it is removed from hardware which requires that | |
193 | * the key->sta pointer is still valid, so flush the key todo | |
194 | * list here. | |
195 | * | |
196 | * ieee80211_key_todo() will synchronize_rcu() so after this | |
197 | * nothing can reference this sta struct any more. | |
198 | */ | |
199 | ieee80211_key_todo(); | |
d0709a65 JB |
200 | |
201 | #ifdef CONFIG_MAC80211_MESH | |
202 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
203 | del_timer_sync(&sta->plink_timer); | |
204 | #endif | |
205 | ||
f0706e82 JB |
206 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { |
207 | local->total_ps_buffered--; | |
208 | dev_kfree_skb_any(skb); | |
209 | } | |
d0709a65 JB |
210 | |
211 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) | |
f0706e82 | 212 | dev_kfree_skb_any(skb); |
d0709a65 | 213 | |
fe3bf0f5 | 214 | for (i = 0; i < STA_TID_NUM; i++) { |
55687e38 JB |
215 | struct tid_ampdu_rx *tid_rx; |
216 | struct tid_ampdu_tx *tid_tx; | |
217 | ||
07346f81 | 218 | spin_lock_bh(&sta->lock); |
55687e38 JB |
219 | tid_rx = sta->ampdu_mlme.tid_rx[i]; |
220 | /* Make sure timer won't free the tid_rx struct, see below */ | |
221 | if (tid_rx) | |
222 | tid_rx->shutdown = true; | |
96f5e66e | 223 | |
07346f81 | 224 | spin_unlock_bh(&sta->lock); |
55687e38 JB |
225 | |
226 | /* | |
227 | * Outside spinlock - shutdown is true now so that the timer | |
228 | * won't free tid_rx, we have to do that now. Can't let the | |
229 | * timer do it because we have to sync the timer outside the | |
230 | * lock that it takes itself. | |
231 | */ | |
232 | if (tid_rx) { | |
233 | del_timer_sync(&tid_rx->session_timer); | |
234 | kfree(tid_rx); | |
235 | } | |
236 | ||
237 | /* | |
238 | * No need to do such complications for TX agg sessions, the | |
239 | * path leading to freeing the tid_tx struct goes via a call | |
240 | * from the driver, and thus needs to look up the sta struct | |
241 | * again, which cannot be found when we get here. Hence, we | |
242 | * just need to delete the timer and free the aggregation | |
243 | * info; we won't be telling the peer about it then but that | |
244 | * doesn't matter if we're not talking to it again anyway. | |
245 | */ | |
246 | tid_tx = sta->ampdu_mlme.tid_tx[i]; | |
247 | if (tid_tx) { | |
248 | del_timer_sync(&tid_tx->addba_resp_timer); | |
cd8ffc80 JB |
249 | /* |
250 | * STA removed while aggregation session being | |
251 | * started? Bit odd, but purge frames anyway. | |
252 | */ | |
253 | skb_queue_purge(&tid_tx->pending); | |
55687e38 JB |
254 | kfree(tid_tx); |
255 | } | |
fe3bf0f5 | 256 | } |
cee24a3e | 257 | |
93e5deb1 | 258 | __sta_info_free(local, sta); |
f0706e82 JB |
259 | } |
260 | ||
261 | ||
d0709a65 JB |
262 | /* Caller must hold local->sta_lock */ |
263 | static void sta_info_hash_add(struct ieee80211_local *local, | |
264 | struct sta_info *sta) | |
f0706e82 | 265 | { |
17741cdc JB |
266 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
267 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); | |
f0706e82 | 268 | } |
f0706e82 | 269 | |
af818581 JB |
270 | static void sta_unblock(struct work_struct *wk) |
271 | { | |
272 | struct sta_info *sta; | |
273 | ||
274 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
275 | ||
276 | if (sta->dead) | |
277 | return; | |
278 | ||
279 | if (!test_sta_flags(sta, WLAN_STA_PS_STA)) | |
280 | ieee80211_sta_ps_deliver_wakeup(sta); | |
281 | else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) | |
282 | ieee80211_sta_ps_deliver_poll_response(sta); | |
283 | } | |
284 | ||
af65cd96 JB |
285 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
286 | struct sta_info *sta, gfp_t gfp) | |
287 | { | |
288 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
289 | return 0; | |
290 | ||
291 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
292 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, | |
293 | &sta->sta, gfp); | |
294 | if (!sta->rate_ctrl_priv) { | |
295 | rate_control_put(sta->rate_ctrl); | |
296 | return -ENOMEM; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
73651ee6 JB |
302 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
303 | u8 *addr, gfp_t gfp) | |
f0706e82 | 304 | { |
d0709a65 | 305 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 306 | struct sta_info *sta; |
16c5f15c | 307 | int i; |
f0706e82 | 308 | |
17741cdc | 309 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 310 | if (!sta) |
73651ee6 | 311 | return NULL; |
f0706e82 | 312 | |
07346f81 | 313 | spin_lock_init(&sta->lock); |
5a9f7b04 | 314 | spin_lock_init(&sta->flaglock); |
af818581 | 315 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
07346f81 | 316 | |
17741cdc | 317 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
318 | sta->local = local; |
319 | sta->sdata = sdata; | |
f0706e82 | 320 | |
af65cd96 | 321 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 322 | kfree(sta); |
73651ee6 | 323 | return NULL; |
f0706e82 JB |
324 | } |
325 | ||
16c5f15c RR |
326 | for (i = 0; i < STA_TID_NUM; i++) { |
327 | /* timer_to_tid must be initialized with identity mapping to | |
328 | * enable session_timer's data differentiation. refer to | |
329 | * sta_rx_agg_session_timer_expired for useage */ | |
330 | sta->timer_to_tid[i] = i; | |
cee24a3e RR |
331 | /* rx */ |
332 | sta->ampdu_mlme.tid_state_rx[i] = HT_AGG_STATE_IDLE; | |
333 | sta->ampdu_mlme.tid_rx[i] = NULL; | |
334 | /* tx */ | |
335 | sta->ampdu_mlme.tid_state_tx[i] = HT_AGG_STATE_IDLE; | |
336 | sta->ampdu_mlme.tid_tx[i] = NULL; | |
337 | sta->ampdu_mlme.addba_req_num[i] = 0; | |
16c5f15c | 338 | } |
f0706e82 JB |
339 | skb_queue_head_init(&sta->ps_tx_buf); |
340 | skb_queue_head_init(&sta->tx_filtered); | |
73651ee6 | 341 | |
cccaec98 SB |
342 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
343 | sta->last_seq_ctrl[i] = cpu_to_le16(USHORT_MAX); | |
344 | ||
73651ee6 | 345 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
346 | printk(KERN_DEBUG "%s: Allocated STA %pM\n", |
347 | wiphy_name(local->hw.wiphy), sta->sta.addr); | |
73651ee6 JB |
348 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
349 | ||
03e4497e | 350 | #ifdef CONFIG_MAC80211_MESH |
b4e08ea1 | 351 | sta->plink_state = PLINK_LISTEN; |
03e4497e JB |
352 | init_timer(&sta->plink_timer); |
353 | #endif | |
354 | ||
73651ee6 JB |
355 | return sta; |
356 | } | |
357 | ||
358 | int sta_info_insert(struct sta_info *sta) | |
359 | { | |
360 | struct ieee80211_local *local = sta->local; | |
361 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
98b62183 | 362 | struct station_info sinfo; |
73651ee6 | 363 | unsigned long flags; |
93e5deb1 | 364 | int err = 0; |
73651ee6 | 365 | |
03e4497e JB |
366 | /* |
367 | * Can't be a WARN_ON because it can be triggered through a race: | |
368 | * something inserts a STA (on one CPU) without holding the RTNL | |
369 | * and another CPU turns off the net device. | |
370 | */ | |
9607e6b6 | 371 | if (unlikely(!ieee80211_sdata_running(sdata))) { |
93e5deb1 JB |
372 | err = -ENETDOWN; |
373 | goto out_free; | |
374 | } | |
03e4497e | 375 | |
47846c9b | 376 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
c6a1fa12 | 377 | is_multicast_ether_addr(sta->sta.addr))) { |
93e5deb1 JB |
378 | err = -EINVAL; |
379 | goto out_free; | |
380 | } | |
44213b5e | 381 | |
d0709a65 | 382 | spin_lock_irqsave(&local->sta_lock, flags); |
43ba7e95 | 383 | /* check if STA exists already */ |
abe60632 | 384 | if (sta_info_get(sdata, sta->sta.addr)) { |
d0709a65 | 385 | spin_unlock_irqrestore(&local->sta_lock, flags); |
93e5deb1 JB |
386 | err = -EEXIST; |
387 | goto out_free; | |
43ba7e95 | 388 | } |
f0706e82 | 389 | list_add(&sta->list, &local->sta_list); |
f5ea9120 | 390 | local->sta_generation++; |
f0706e82 JB |
391 | local->num_sta++; |
392 | sta_info_hash_add(local, sta); | |
32bfd35d | 393 | |
d0709a65 JB |
394 | /* notify driver */ |
395 | if (local->ops->sta_notify) { | |
05c914fe | 396 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
3e122be0 JB |
397 | sdata = container_of(sdata->bss, |
398 | struct ieee80211_sub_if_data, | |
399 | u.ap); | |
32bfd35d | 400 | |
12375ef9 | 401 | drv_sta_notify(local, sdata, STA_NOTIFY_ADD, &sta->sta); |
fbc44bf7 | 402 | sdata = sta->sdata; |
32bfd35d | 403 | } |
d0709a65 | 404 | |
f0706e82 | 405 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0c68ae26 JB |
406 | printk(KERN_DEBUG "%s: Inserted STA %pM\n", |
407 | wiphy_name(local->hw.wiphy), sta->sta.addr); | |
f0706e82 JB |
408 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
409 | ||
73651ee6 JB |
410 | spin_unlock_irqrestore(&local->sta_lock, flags); |
411 | ||
98b62183 JB |
412 | sinfo.filled = 0; |
413 | sinfo.generation = local->sta_generation; | |
414 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_ATOMIC); | |
415 | ||
e9f207f0 | 416 | #ifdef CONFIG_MAC80211_DEBUGFS |
93e5deb1 JB |
417 | /* |
418 | * Debugfs entry adding might sleep, so schedule process | |
be8755e1 | 419 | * context task for adding entry for STAs that do not yet |
93e5deb1 JB |
420 | * have one. |
421 | * NOTE: due to auto-freeing semantics this may only be done | |
422 | * if the insertion is successful! | |
423 | */ | |
49ec6fa2 | 424 | schedule_work(&local->sta_debugfs_add); |
e9f207f0 JB |
425 | #endif |
426 | ||
73651ee6 JB |
427 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
428 | mesh_accept_plinks_update(sdata); | |
429 | ||
430 | return 0; | |
93e5deb1 JB |
431 | out_free: |
432 | BUG_ON(!err); | |
433 | __sta_info_free(local, sta); | |
434 | return err; | |
f0706e82 JB |
435 | } |
436 | ||
004c872e JB |
437 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
438 | { | |
439 | /* | |
440 | * This format has been mandated by the IEEE specifications, | |
441 | * so this line may not be changed to use the __set_bit() format. | |
442 | */ | |
443 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
444 | } | |
445 | ||
446 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
447 | { | |
448 | /* | |
449 | * This format has been mandated by the IEEE specifications, | |
450 | * so this line may not be changed to use the __clear_bit() format. | |
451 | */ | |
452 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
453 | } | |
454 | ||
455 | static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss, | |
456 | struct sta_info *sta) | |
457 | { | |
3e122be0 JB |
458 | BUG_ON(!bss); |
459 | ||
17741cdc | 460 | __bss_tim_set(bss, sta->sta.aid); |
3e122be0 | 461 | |
d0709a65 JB |
462 | if (sta->local->ops->set_tim) { |
463 | sta->local->tim_in_locked_section = true; | |
24487981 | 464 | drv_set_tim(sta->local, &sta->sta, true); |
d0709a65 JB |
465 | sta->local->tim_in_locked_section = false; |
466 | } | |
004c872e JB |
467 | } |
468 | ||
469 | void sta_info_set_tim_bit(struct sta_info *sta) | |
470 | { | |
d0709a65 | 471 | unsigned long flags; |
004c872e | 472 | |
3e122be0 JB |
473 | BUG_ON(!sta->sdata->bss); |
474 | ||
d0709a65 JB |
475 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
476 | __sta_info_set_tim_bit(sta->sdata->bss, sta); | |
477 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
478 | } |
479 | ||
480 | static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss, | |
481 | struct sta_info *sta) | |
482 | { | |
3e122be0 JB |
483 | BUG_ON(!bss); |
484 | ||
17741cdc | 485 | __bss_tim_clear(bss, sta->sta.aid); |
3e122be0 | 486 | |
d0709a65 JB |
487 | if (sta->local->ops->set_tim) { |
488 | sta->local->tim_in_locked_section = true; | |
24487981 | 489 | drv_set_tim(sta->local, &sta->sta, false); |
d0709a65 JB |
490 | sta->local->tim_in_locked_section = false; |
491 | } | |
004c872e JB |
492 | } |
493 | ||
494 | void sta_info_clear_tim_bit(struct sta_info *sta) | |
495 | { | |
d0709a65 | 496 | unsigned long flags; |
004c872e | 497 | |
3e122be0 JB |
498 | BUG_ON(!sta->sdata->bss); |
499 | ||
d0709a65 JB |
500 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
501 | __sta_info_clear_tim_bit(sta->sdata->bss, sta); | |
502 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
503 | } |
504 | ||
24723d1b | 505 | static void __sta_info_unlink(struct sta_info **sta) |
f0706e82 | 506 | { |
d0709a65 JB |
507 | struct ieee80211_local *local = (*sta)->local; |
508 | struct ieee80211_sub_if_data *sdata = (*sta)->sdata; | |
d0709a65 JB |
509 | /* |
510 | * pull caller's reference if we're already gone. | |
511 | */ | |
512 | if (sta_info_hash_del(local, *sta)) { | |
513 | *sta = NULL; | |
514 | return; | |
515 | } | |
be8755e1 | 516 | |
3b96766f JB |
517 | if ((*sta)->key) { |
518 | ieee80211_key_free((*sta)->key); | |
519 | WARN_ON((*sta)->key); | |
520 | } | |
521 | ||
7d1559f1 | 522 | list_del(&(*sta)->list); |
af818581 | 523 | (*sta)->dead = true; |
7d1559f1 | 524 | |
af818581 JB |
525 | if (test_and_clear_sta_flags(*sta, |
526 | WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) { | |
3e122be0 JB |
527 | BUG_ON(!sdata->bss); |
528 | ||
529 | atomic_dec(&sdata->bss->num_sta_ps); | |
7d1559f1 JB |
530 | __sta_info_clear_tim_bit(sdata->bss, *sta); |
531 | } | |
532 | ||
533 | local->num_sta--; | |
f5ea9120 | 534 | local->sta_generation++; |
7d1559f1 | 535 | |
f14543ee FF |
536 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
537 | rcu_assign_pointer(sdata->u.vlan.sta, NULL); | |
538 | ||
7d1559f1 | 539 | if (local->ops->sta_notify) { |
05c914fe | 540 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
3e122be0 JB |
541 | sdata = container_of(sdata->bss, |
542 | struct ieee80211_sub_if_data, | |
543 | u.ap); | |
7d1559f1 | 544 | |
12375ef9 | 545 | drv_sta_notify(local, sdata, STA_NOTIFY_REMOVE, |
24487981 | 546 | &(*sta)->sta); |
fbc44bf7 | 547 | sdata = (*sta)->sdata; |
7d1559f1 JB |
548 | } |
549 | ||
550 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
551 | mesh_accept_plinks_update(sdata); | |
552 | #ifdef CONFIG_MAC80211_MESH | |
553 | del_timer(&(*sta)->plink_timer); | |
554 | #endif | |
555 | } | |
556 | ||
557 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0c68ae26 JB |
558 | printk(KERN_DEBUG "%s: Removed STA %pM\n", |
559 | wiphy_name(local->hw.wiphy), (*sta)->sta.addr); | |
7d1559f1 JB |
560 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
561 | ||
d0709a65 | 562 | /* |
7d1559f1 | 563 | * Finally, pull caller's reference if the STA is pinned by the |
d0709a65 JB |
564 | * task that is adding the debugfs entries. In that case, we |
565 | * leave the STA "to be freed". | |
566 | * | |
567 | * The rules are not trivial, but not too complex either: | |
568 | * (1) pin_status is only modified under the sta_lock | |
49ec6fa2 JB |
569 | * (2) STAs may only be pinned under the RTNL so that |
570 | * sta_info_flush() is guaranteed to actually destroy | |
571 | * all STAs that are active for a given interface, this | |
572 | * is required for correctness because otherwise we | |
573 | * could notify a driver that an interface is going | |
574 | * away and only after that (!) notify it about a STA | |
575 | * on that interface going away. | |
576 | * (3) sta_info_debugfs_add_work() will set the status | |
d0709a65 JB |
577 | * to PINNED when it found an item that needs a new |
578 | * debugfs directory created. In that case, that item | |
579 | * must not be freed although all *RCU* users are done | |
580 | * with it. Hence, we tell the caller of _unlink() | |
581 | * that the item is already gone (as can happen when | |
582 | * two tasks try to unlink/destroy at the same time) | |
49ec6fa2 | 583 | * (4) We set the pin_status to DESTROY here when we |
d0709a65 | 584 | * find such an item. |
49ec6fa2 | 585 | * (5) sta_info_debugfs_add_work() will reset the pin_status |
d0709a65 JB |
586 | * from PINNED to NORMAL when it is done with the item, |
587 | * but will check for DESTROY before resetting it in | |
588 | * which case it will free the item. | |
589 | */ | |
590 | if ((*sta)->pin_status == STA_INFO_PIN_STAT_PINNED) { | |
591 | (*sta)->pin_status = STA_INFO_PIN_STAT_DESTROY; | |
592 | *sta = NULL; | |
593 | return; | |
594 | } | |
f0706e82 JB |
595 | } |
596 | ||
d0709a65 JB |
597 | void sta_info_unlink(struct sta_info **sta) |
598 | { | |
599 | struct ieee80211_local *local = (*sta)->local; | |
600 | unsigned long flags; | |
601 | ||
602 | spin_lock_irqsave(&local->sta_lock, flags); | |
603 | __sta_info_unlink(sta); | |
604 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
605 | } | |
f0706e82 | 606 | |
57c4d7b4 JB |
607 | static int sta_info_buffer_expired(struct sta_info *sta, |
608 | struct sk_buff *skb) | |
f0706e82 | 609 | { |
e039fa4a | 610 | struct ieee80211_tx_info *info; |
f0706e82 JB |
611 | int timeout; |
612 | ||
613 | if (!skb) | |
614 | return 0; | |
615 | ||
e039fa4a | 616 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
617 | |
618 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
619 | timeout = (sta->listen_interval * |
620 | sta->sdata->vif.bss_conf.beacon_int * | |
621 | 32 / 15625) * HZ; | |
f0706e82 JB |
622 | if (timeout < STA_TX_BUFFER_EXPIRE) |
623 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 624 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
625 | } |
626 | ||
627 | ||
628 | static void sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
629 | struct sta_info *sta) | |
630 | { | |
631 | unsigned long flags; | |
632 | struct sk_buff *skb; | |
836341a7 | 633 | struct ieee80211_sub_if_data *sdata; |
f0706e82 JB |
634 | |
635 | if (skb_queue_empty(&sta->ps_tx_buf)) | |
636 | return; | |
637 | ||
638 | for (;;) { | |
639 | spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); | |
640 | skb = skb_peek(&sta->ps_tx_buf); | |
57c4d7b4 | 641 | if (sta_info_buffer_expired(sta, skb)) |
f0706e82 | 642 | skb = __skb_dequeue(&sta->ps_tx_buf); |
836341a7 | 643 | else |
f0706e82 JB |
644 | skb = NULL; |
645 | spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); | |
646 | ||
836341a7 | 647 | if (!skb) |
f0706e82 | 648 | break; |
836341a7 | 649 | |
d0709a65 | 650 | sdata = sta->sdata; |
836341a7 | 651 | local->total_ps_buffered--; |
f4ea83dd | 652 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
653 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
654 | sta->sta.addr); | |
f4ea83dd | 655 | #endif |
836341a7 JB |
656 | dev_kfree_skb(skb); |
657 | ||
004c872e JB |
658 | if (skb_queue_empty(&sta->ps_tx_buf)) |
659 | sta_info_clear_tim_bit(sta); | |
f0706e82 JB |
660 | } |
661 | } | |
662 | ||
663 | ||
664 | static void sta_info_cleanup(unsigned long data) | |
665 | { | |
666 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
667 | struct sta_info *sta; | |
668 | ||
d0709a65 JB |
669 | rcu_read_lock(); |
670 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
f0706e82 | 671 | sta_info_cleanup_expire_buffered(local, sta); |
d0709a65 | 672 | rcu_read_unlock(); |
f0706e82 | 673 | |
5bb644a0 JB |
674 | if (local->quiescing) |
675 | return; | |
676 | ||
0d174406 JB |
677 | local->sta_cleanup.expires = |
678 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
f0706e82 JB |
679 | add_timer(&local->sta_cleanup); |
680 | } | |
681 | ||
e9f207f0 | 682 | #ifdef CONFIG_MAC80211_DEBUGFS |
4d6141c3 JS |
683 | /* |
684 | * See comment in __sta_info_unlink, | |
685 | * caller must hold local->sta_lock. | |
686 | */ | |
687 | static void __sta_info_pin(struct sta_info *sta) | |
688 | { | |
689 | WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_NORMAL); | |
690 | sta->pin_status = STA_INFO_PIN_STAT_PINNED; | |
691 | } | |
692 | ||
693 | /* | |
694 | * See comment in __sta_info_unlink, returns sta if it | |
695 | * needs to be destroyed. | |
696 | */ | |
697 | static struct sta_info *__sta_info_unpin(struct sta_info *sta) | |
698 | { | |
699 | struct sta_info *ret = NULL; | |
700 | unsigned long flags; | |
701 | ||
702 | spin_lock_irqsave(&sta->local->sta_lock, flags); | |
703 | WARN_ON(sta->pin_status != STA_INFO_PIN_STAT_DESTROY && | |
704 | sta->pin_status != STA_INFO_PIN_STAT_PINNED); | |
705 | if (sta->pin_status == STA_INFO_PIN_STAT_DESTROY) | |
706 | ret = sta; | |
707 | sta->pin_status = STA_INFO_PIN_STAT_NORMAL; | |
708 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
709 | ||
710 | return ret; | |
711 | } | |
712 | ||
d0709a65 | 713 | static void sta_info_debugfs_add_work(struct work_struct *work) |
e9f207f0 JB |
714 | { |
715 | struct ieee80211_local *local = | |
716 | container_of(work, struct ieee80211_local, sta_debugfs_add); | |
717 | struct sta_info *sta, *tmp; | |
d0709a65 | 718 | unsigned long flags; |
e9f207f0 | 719 | |
49ec6fa2 JB |
720 | /* We need to keep the RTNL across the whole pinned status. */ |
721 | rtnl_lock(); | |
e9f207f0 JB |
722 | while (1) { |
723 | sta = NULL; | |
d0709a65 JB |
724 | |
725 | spin_lock_irqsave(&local->sta_lock, flags); | |
e9f207f0 | 726 | list_for_each_entry(tmp, &local->sta_list, list) { |
63044e9f JB |
727 | /* |
728 | * debugfs.add_has_run will be set by | |
729 | * ieee80211_sta_debugfs_add regardless | |
730 | * of what else it does. | |
731 | */ | |
732 | if (!tmp->debugfs.add_has_run) { | |
e9f207f0 | 733 | sta = tmp; |
d0709a65 | 734 | __sta_info_pin(sta); |
e9f207f0 JB |
735 | break; |
736 | } | |
737 | } | |
d0709a65 | 738 | spin_unlock_irqrestore(&local->sta_lock, flags); |
e9f207f0 JB |
739 | |
740 | if (!sta) | |
741 | break; | |
742 | ||
e9f207f0 JB |
743 | ieee80211_sta_debugfs_add(sta); |
744 | rate_control_add_sta_debugfs(sta); | |
d0709a65 JB |
745 | |
746 | sta = __sta_info_unpin(sta); | |
4f6fab47 | 747 | sta_info_destroy(sta); |
e9f207f0 | 748 | } |
49ec6fa2 | 749 | rtnl_unlock(); |
e9f207f0 JB |
750 | } |
751 | #endif | |
752 | ||
f0706e82 JB |
753 | void sta_info_init(struct ieee80211_local *local) |
754 | { | |
d0709a65 | 755 | spin_lock_init(&local->sta_lock); |
f0706e82 | 756 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 757 | |
b24b8a24 PE |
758 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
759 | (unsigned long)local); | |
0d174406 JB |
760 | local->sta_cleanup.expires = |
761 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL); | |
e9f207f0 JB |
762 | |
763 | #ifdef CONFIG_MAC80211_DEBUGFS | |
d0709a65 | 764 | INIT_WORK(&local->sta_debugfs_add, sta_info_debugfs_add_work); |
e9f207f0 | 765 | #endif |
f0706e82 JB |
766 | } |
767 | ||
768 | int sta_info_start(struct ieee80211_local *local) | |
769 | { | |
770 | add_timer(&local->sta_cleanup); | |
771 | return 0; | |
772 | } | |
773 | ||
774 | void sta_info_stop(struct ieee80211_local *local) | |
775 | { | |
f0706e82 | 776 | del_timer(&local->sta_cleanup); |
49ec6fa2 JB |
777 | #ifdef CONFIG_MAC80211_DEBUGFS |
778 | /* | |
779 | * Make sure the debugfs adding work isn't pending after this | |
780 | * because we're about to be destroyed. It doesn't matter | |
781 | * whether it ran or not since we're going to flush all STAs | |
782 | * anyway. | |
783 | */ | |
784 | cancel_work_sync(&local->sta_debugfs_add); | |
785 | #endif | |
dc6676b7 | 786 | |
be8755e1 | 787 | sta_info_flush(local, NULL); |
f0706e82 JB |
788 | } |
789 | ||
f0706e82 JB |
790 | /** |
791 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
792 | * |
793 | * Returns the number of removed STA entries. | |
794 | * | |
f0706e82 | 795 | * @local: local interface data |
d0709a65 | 796 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 797 | */ |
44213b5e | 798 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 799 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
800 | { |
801 | struct sta_info *sta, *tmp; | |
be8755e1 | 802 | LIST_HEAD(tmp_list); |
44213b5e | 803 | int ret = 0; |
d0709a65 | 804 | unsigned long flags; |
f0706e82 | 805 | |
d0709a65 | 806 | might_sleep(); |
be8755e1 | 807 | |
d0709a65 JB |
808 | spin_lock_irqsave(&local->sta_lock, flags); |
809 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
810 | if (!sdata || sdata == sta->sdata) { | |
811 | __sta_info_unlink(&sta); | |
44213b5e | 812 | if (sta) { |
d0709a65 | 813 | list_add_tail(&sta->list, &tmp_list); |
44213b5e JB |
814 | ret++; |
815 | } | |
d0709a65 | 816 | } |
be8755e1 | 817 | } |
d0709a65 JB |
818 | spin_unlock_irqrestore(&local->sta_lock, flags); |
819 | ||
d0709a65 JB |
820 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
821 | sta_info_destroy(sta); | |
44213b5e JB |
822 | |
823 | return ret; | |
f0706e82 | 824 | } |
dc6676b7 | 825 | |
24723d1b JB |
826 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
827 | unsigned long exp_time) | |
828 | { | |
829 | struct ieee80211_local *local = sdata->local; | |
830 | struct sta_info *sta, *tmp; | |
831 | LIST_HEAD(tmp_list); | |
24723d1b JB |
832 | unsigned long flags; |
833 | ||
834 | spin_lock_irqsave(&local->sta_lock, flags); | |
835 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) | |
836 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
837 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 838 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 839 | sdata->name, sta->sta.addr); |
24723d1b JB |
840 | #endif |
841 | __sta_info_unlink(&sta); | |
842 | if (sta) | |
843 | list_add(&sta->list, &tmp_list); | |
844 | } | |
845 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
846 | ||
847 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) | |
848 | sta_info_destroy(sta); | |
849 | } | |
17741cdc | 850 | |
5ed176e1 JB |
851 | struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw, |
852 | const u8 *addr) | |
17741cdc | 853 | { |
abe60632 | 854 | struct sta_info *sta, *nxt; |
17741cdc | 855 | |
abe60632 JB |
856 | /* Just return a random station ... first in list ... */ |
857 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) | |
858 | return &sta->sta; | |
859 | return NULL; | |
17741cdc | 860 | } |
5ed176e1 JB |
861 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_hw); |
862 | ||
863 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
864 | const u8 *addr) | |
865 | { | |
866 | struct ieee80211_sub_if_data *sdata; | |
867 | ||
868 | if (!vif) | |
869 | return NULL; | |
870 | ||
871 | sdata = vif_to_sdata(vif); | |
872 | ||
873 | return ieee80211_find_sta_by_hw(&sdata->local->hw, addr); | |
874 | } | |
17741cdc | 875 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 JB |
876 | |
877 | /* powersave support code */ | |
878 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
879 | { | |
880 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
881 | struct ieee80211_local *local = sdata->local; | |
882 | int sent, buffered; | |
883 | ||
12375ef9 | 884 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); |
af818581 JB |
885 | |
886 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
887 | sta_info_clear_tim_bit(sta); | |
888 | ||
889 | /* Send all buffered frames to the station */ | |
890 | sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered); | |
891 | buffered = ieee80211_add_pending_skbs(local, &sta->ps_tx_buf); | |
892 | sent += buffered; | |
893 | local->total_ps_buffered -= buffered; | |
894 | ||
895 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
896 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 897 | "since STA not sleeping anymore\n", sdata->name, |
af818581 JB |
898 | sta->sta.addr, sta->sta.aid, sent - buffered, buffered); |
899 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
900 | } | |
901 | ||
902 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) | |
903 | { | |
904 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
905 | struct ieee80211_local *local = sdata->local; | |
906 | struct sk_buff *skb; | |
907 | int no_pending_pkts; | |
908 | ||
909 | skb = skb_dequeue(&sta->tx_filtered); | |
910 | if (!skb) { | |
911 | skb = skb_dequeue(&sta->ps_tx_buf); | |
912 | if (skb) | |
913 | local->total_ps_buffered--; | |
914 | } | |
915 | no_pending_pkts = skb_queue_empty(&sta->tx_filtered) && | |
916 | skb_queue_empty(&sta->ps_tx_buf); | |
917 | ||
918 | if (skb) { | |
919 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
920 | struct ieee80211_hdr *hdr = | |
921 | (struct ieee80211_hdr *) skb->data; | |
922 | ||
923 | /* | |
924 | * Tell TX path to send this frame even though the STA may | |
925 | * still remain is PS mode after this frame exchange. | |
926 | */ | |
927 | info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE; | |
928 | ||
929 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
930 | printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n", | |
931 | sta->sta.addr, sta->sta.aid, | |
932 | skb_queue_len(&sta->ps_tx_buf)); | |
933 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
934 | ||
935 | /* Use MoreData flag to indicate whether there are more | |
936 | * buffered frames for this STA */ | |
937 | if (no_pending_pkts) | |
938 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
939 | else | |
940 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
941 | ||
942 | ieee80211_add_pending_skb(local, skb); | |
943 | ||
944 | if (no_pending_pkts) | |
945 | sta_info_clear_tim_bit(sta); | |
946 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
947 | } else { | |
948 | /* | |
949 | * FIXME: This can be the result of a race condition between | |
950 | * us expiring a frame and the station polling for it. | |
951 | * Should we send it a null-func frame indicating we | |
952 | * have nothing buffered for it? | |
953 | */ | |
954 | printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " | |
955 | "though there are no buffered frames for it\n", | |
47846c9b | 956 | sdata->name, sta->sta.addr); |
af818581 JB |
957 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
958 | } | |
959 | } | |
960 | ||
961 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, | |
962 | struct ieee80211_sta *pubsta, bool block) | |
963 | { | |
964 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
965 | ||
966 | if (block) | |
967 | set_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
968 | else | |
969 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); | |
970 | } | |
971 | EXPORT_SYMBOL(ieee80211_sta_block_awake); |