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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 | |
25985edc | 50 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 51 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 52 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 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 | ||
40b275b6 JB |
70 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
71 | lockdep_is_held(&local->sta_lock)); | |
f0706e82 | 72 | if (!s) |
be8755e1 MW |
73 | return -ENOENT; |
74 | if (s == sta) { | |
17741cdc | 75 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 76 | s->hnext); |
be8755e1 | 77 | return 0; |
f0706e82 JB |
78 | } |
79 | ||
40b275b6 JB |
80 | while (rcu_access_pointer(s->hnext) && |
81 | rcu_access_pointer(s->hnext) != sta) | |
82 | s = rcu_dereference_protected(s->hnext, | |
83 | lockdep_is_held(&local->sta_lock)); | |
84 | if (rcu_access_pointer(s->hnext)) { | |
d0709a65 | 85 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
86 | return 0; |
87 | } | |
f0706e82 | 88 | |
be8755e1 | 89 | return -ENOENT; |
f0706e82 JB |
90 | } |
91 | ||
d0709a65 | 92 | /* protected by RCU */ |
abe60632 JB |
93 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
94 | const u8 *addr) | |
f0706e82 | 95 | { |
abe60632 | 96 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
97 | struct sta_info *sta; |
98 | ||
0379185b | 99 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b JB |
100 | lockdep_is_held(&local->sta_lock) || |
101 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 102 | while (sta) { |
abe60632 JB |
103 | if (sta->sdata == sdata && |
104 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 105 | break; |
0379185b | 106 | sta = rcu_dereference_check(sta->hnext, |
0379185b JB |
107 | lockdep_is_held(&local->sta_lock) || |
108 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 109 | } |
43ba7e95 JB |
110 | return sta; |
111 | } | |
112 | ||
0e5ded5a FF |
113 | /* |
114 | * Get sta info either from the specified interface | |
115 | * or from one of its vlans | |
116 | */ | |
117 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
118 | const u8 *addr) | |
119 | { | |
120 | struct ieee80211_local *local = sdata->local; | |
121 | struct sta_info *sta; | |
122 | ||
0379185b | 123 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b JB |
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 | 131 | sta = rcu_dereference_check(sta->hnext, |
0379185b JB |
132 | lockdep_is_held(&local->sta_lock) || |
133 | lockdep_is_held(&local->sta_mtx)); | |
0e5ded5a FF |
134 | } |
135 | return sta; | |
136 | } | |
137 | ||
3b53fde8 JB |
138 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
139 | int idx) | |
ee385855 | 140 | { |
3b53fde8 | 141 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
142 | struct sta_info *sta; |
143 | int i = 0; | |
144 | ||
d0709a65 | 145 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 146 | if (sdata != sta->sdata) |
2a8ca29a | 147 | continue; |
ee385855 LCC |
148 | if (i < idx) { |
149 | ++i; | |
150 | continue; | |
ee385855 | 151 | } |
2a8ca29a | 152 | return sta; |
ee385855 | 153 | } |
ee385855 LCC |
154 | |
155 | return NULL; | |
156 | } | |
f0706e82 | 157 | |
93e5deb1 JB |
158 | /** |
159 | * __sta_info_free - internal STA free helper | |
160 | * | |
6ef307bc | 161 | * @local: pointer to the global information |
93e5deb1 JB |
162 | * @sta: STA info to free |
163 | * | |
164 | * This function must undo everything done by sta_info_alloc() | |
165 | * that may happen before sta_info_insert(). | |
166 | */ | |
167 | static void __sta_info_free(struct ieee80211_local *local, | |
168 | struct sta_info *sta) | |
169 | { | |
af65cd96 JB |
170 | if (sta->rate_ctrl) { |
171 | rate_control_free_sta(sta); | |
172 | rate_control_put(sta->rate_ctrl); | |
173 | } | |
93e5deb1 JB |
174 | |
175 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 176 | wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
177 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
178 | ||
179 | kfree(sta); | |
180 | } | |
181 | ||
d0709a65 JB |
182 | /* Caller must hold local->sta_lock */ |
183 | static void sta_info_hash_add(struct ieee80211_local *local, | |
184 | struct sta_info *sta) | |
f0706e82 | 185 | { |
17741cdc JB |
186 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
187 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); | |
f0706e82 | 188 | } |
f0706e82 | 189 | |
af818581 JB |
190 | static void sta_unblock(struct work_struct *wk) |
191 | { | |
192 | struct sta_info *sta; | |
193 | ||
194 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
195 | ||
196 | if (sta->dead) | |
197 | return; | |
198 | ||
199 | if (!test_sta_flags(sta, WLAN_STA_PS_STA)) | |
200 | ieee80211_sta_ps_deliver_wakeup(sta); | |
50a9432d JB |
201 | else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) { |
202 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
af818581 | 203 | ieee80211_sta_ps_deliver_poll_response(sta); |
50a9432d JB |
204 | } else |
205 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
af818581 JB |
206 | } |
207 | ||
af65cd96 JB |
208 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
209 | struct sta_info *sta, gfp_t gfp) | |
210 | { | |
211 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
212 | return 0; | |
213 | ||
214 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
215 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, | |
216 | &sta->sta, gfp); | |
217 | if (!sta->rate_ctrl_priv) { | |
218 | rate_control_put(sta->rate_ctrl); | |
219 | return -ENOMEM; | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
73651ee6 JB |
225 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
226 | u8 *addr, gfp_t gfp) | |
f0706e82 | 227 | { |
d0709a65 | 228 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 229 | struct sta_info *sta; |
ebe27c91 | 230 | struct timespec uptime; |
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 | |
ebe27c91 MSS |
248 | do_posix_clock_monotonic_gettime(&uptime); |
249 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
250 | ewma_init(&sta->avg_signal, 1024, 8); |
251 | ||
af65cd96 | 252 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 253 | kfree(sta); |
73651ee6 | 254 | return NULL; |
f0706e82 JB |
255 | } |
256 | ||
16c5f15c | 257 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
258 | /* |
259 | * timer_to_tid must be initialized with identity mapping | |
260 | * to enable session_timer's data differentiation. See | |
261 | * sta_rx_agg_session_timer_expired for usage. | |
262 | */ | |
16c5f15c | 263 | sta->timer_to_tid[i] = i; |
16c5f15c | 264 | } |
f0706e82 JB |
265 | skb_queue_head_init(&sta->ps_tx_buf); |
266 | skb_queue_head_init(&sta->tx_filtered); | |
73651ee6 | 267 | |
cccaec98 | 268 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 269 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 270 | |
73651ee6 | 271 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 272 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
273 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
274 | ||
03e4497e | 275 | #ifdef CONFIG_MAC80211_MESH |
57cf8043 | 276 | sta->plink_state = NL80211_PLINK_LISTEN; |
03e4497e JB |
277 | init_timer(&sta->plink_timer); |
278 | #endif | |
279 | ||
73651ee6 JB |
280 | return sta; |
281 | } | |
282 | ||
34e89507 | 283 | static int sta_info_finish_insert(struct sta_info *sta, bool async) |
73651ee6 JB |
284 | { |
285 | struct ieee80211_local *local = sta->local; | |
286 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
98b62183 | 287 | struct station_info sinfo; |
73651ee6 | 288 | unsigned long flags; |
93e5deb1 | 289 | int err = 0; |
73651ee6 | 290 | |
46a5ebaf | 291 | lockdep_assert_held(&local->sta_mtx); |
34e89507 JB |
292 | |
293 | /* notify driver */ | |
294 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
295 | sdata = container_of(sdata->bss, | |
296 | struct ieee80211_sub_if_data, | |
297 | u.ap); | |
298 | err = drv_sta_add(local, sdata, &sta->sta); | |
299 | if (err) { | |
300 | if (!async) | |
301 | return err; | |
302 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to driver (%d)" | |
303 | " - keeping it anyway.\n", | |
304 | sdata->name, sta->sta.addr, err); | |
305 | } else { | |
306 | sta->uploaded = true; | |
307 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
308 | if (async) | |
0fb9a9ec JP |
309 | wiphy_debug(local->hw.wiphy, |
310 | "Finished adding IBSS STA %pM\n", | |
311 | sta->sta.addr); | |
34e89507 JB |
312 | #endif |
313 | } | |
314 | ||
315 | sdata = sta->sdata; | |
316 | ||
317 | if (!async) { | |
318 | local->num_sta++; | |
319 | local->sta_generation++; | |
320 | smp_mb(); | |
321 | ||
322 | /* make the station visible */ | |
323 | spin_lock_irqsave(&local->sta_lock, flags); | |
324 | sta_info_hash_add(local, sta); | |
325 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
326 | } | |
327 | ||
328 | list_add(&sta->list, &local->sta_list); | |
329 | ||
330 | ieee80211_sta_debugfs_add(sta); | |
331 | rate_control_add_sta_debugfs(sta); | |
332 | ||
333 | sinfo.filled = 0; | |
334 | sinfo.generation = local->sta_generation; | |
335 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
336 | ||
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | static void sta_info_finish_pending(struct ieee80211_local *local) | |
342 | { | |
343 | struct sta_info *sta; | |
344 | unsigned long flags; | |
345 | ||
346 | spin_lock_irqsave(&local->sta_lock, flags); | |
347 | while (!list_empty(&local->sta_pending_list)) { | |
348 | sta = list_first_entry(&local->sta_pending_list, | |
349 | struct sta_info, list); | |
350 | list_del(&sta->list); | |
351 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
352 | ||
353 | sta_info_finish_insert(sta, true); | |
354 | ||
355 | spin_lock_irqsave(&local->sta_lock, flags); | |
356 | } | |
357 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
358 | } | |
359 | ||
360 | static void sta_info_finish_work(struct work_struct *work) | |
361 | { | |
362 | struct ieee80211_local *local = | |
363 | container_of(work, struct ieee80211_local, sta_finish_work); | |
364 | ||
365 | mutex_lock(&local->sta_mtx); | |
366 | sta_info_finish_pending(local); | |
367 | mutex_unlock(&local->sta_mtx); | |
368 | } | |
369 | ||
370 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
371 | { | |
372 | struct ieee80211_local *local = sta->local; | |
373 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
374 | unsigned long flags; | |
375 | int err = 0; | |
376 | ||
03e4497e JB |
377 | /* |
378 | * Can't be a WARN_ON because it can be triggered through a race: | |
379 | * something inserts a STA (on one CPU) without holding the RTNL | |
380 | * and another CPU turns off the net device. | |
381 | */ | |
9607e6b6 | 382 | if (unlikely(!ieee80211_sdata_running(sdata))) { |
93e5deb1 | 383 | err = -ENETDOWN; |
34e89507 | 384 | rcu_read_lock(); |
93e5deb1 JB |
385 | goto out_free; |
386 | } | |
03e4497e | 387 | |
47846c9b | 388 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
c6a1fa12 | 389 | is_multicast_ether_addr(sta->sta.addr))) { |
93e5deb1 | 390 | err = -EINVAL; |
34e89507 | 391 | rcu_read_lock(); |
93e5deb1 JB |
392 | goto out_free; |
393 | } | |
44213b5e | 394 | |
34e89507 JB |
395 | /* |
396 | * In ad-hoc mode, we sometimes need to insert stations | |
397 | * from tasklet context from the RX path. To avoid races, | |
398 | * always do so in that case -- see the comment below. | |
399 | */ | |
400 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
401 | spin_lock_irqsave(&local->sta_lock, flags); | |
402 | /* check if STA exists already */ | |
403 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
404 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
405 | rcu_read_lock(); | |
406 | err = -EEXIST; | |
407 | goto out_free; | |
408 | } | |
409 | ||
410 | local->num_sta++; | |
411 | local->sta_generation++; | |
412 | smp_mb(); | |
413 | sta_info_hash_add(local, sta); | |
414 | ||
415 | list_add_tail(&sta->list, &local->sta_pending_list); | |
416 | ||
417 | rcu_read_lock(); | |
418 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
419 | ||
420 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec JP |
421 | wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", |
422 | sta->sta.addr); | |
34e89507 JB |
423 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
424 | ||
425 | ieee80211_queue_work(&local->hw, &local->sta_finish_work); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | /* | |
431 | * On first glance, this will look racy, because the code | |
432 | * below this point, which inserts a station with sleeping, | |
433 | * unlocks the sta_lock between checking existence in the | |
434 | * hash table and inserting into it. | |
435 | * | |
436 | * However, it is not racy against itself because it keeps | |
437 | * the mutex locked. It still seems to race against the | |
438 | * above code that atomically inserts the station... That, | |
439 | * however, is not true because the above code can only | |
440 | * be invoked for IBSS interfaces, and the below code will | |
441 | * not be -- and the two do not race against each other as | |
442 | * the hash table also keys off the interface. | |
443 | */ | |
444 | ||
445 | might_sleep(); | |
446 | ||
447 | mutex_lock(&local->sta_mtx); | |
448 | ||
d0709a65 | 449 | spin_lock_irqsave(&local->sta_lock, flags); |
43ba7e95 | 450 | /* check if STA exists already */ |
34e89507 | 451 | if (sta_info_get_bss(sdata, sta->sta.addr)) { |
d0709a65 | 452 | spin_unlock_irqrestore(&local->sta_lock, flags); |
38a679a5 | 453 | mutex_unlock(&local->sta_mtx); |
34e89507 | 454 | rcu_read_lock(); |
93e5deb1 JB |
455 | err = -EEXIST; |
456 | goto out_free; | |
43ba7e95 | 457 | } |
32bfd35d | 458 | |
34e89507 | 459 | spin_unlock_irqrestore(&local->sta_lock, flags); |
32bfd35d | 460 | |
34e89507 JB |
461 | err = sta_info_finish_insert(sta, false); |
462 | if (err) { | |
463 | mutex_unlock(&local->sta_mtx); | |
464 | rcu_read_lock(); | |
465 | goto out_free; | |
32bfd35d | 466 | } |
d0709a65 | 467 | |
f0706e82 | 468 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 469 | wiphy_debug(local->hw.wiphy, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 JB |
470 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
471 | ||
34e89507 JB |
472 | /* move reference to rcu-protected */ |
473 | rcu_read_lock(); | |
474 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 475 | |
73651ee6 JB |
476 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
477 | mesh_accept_plinks_update(sdata); | |
478 | ||
479 | return 0; | |
93e5deb1 JB |
480 | out_free: |
481 | BUG_ON(!err); | |
482 | __sta_info_free(local, sta); | |
483 | return err; | |
f0706e82 JB |
484 | } |
485 | ||
34e89507 JB |
486 | int sta_info_insert(struct sta_info *sta) |
487 | { | |
488 | int err = sta_info_insert_rcu(sta); | |
489 | ||
490 | rcu_read_unlock(); | |
491 | ||
492 | return err; | |
493 | } | |
494 | ||
004c872e JB |
495 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
496 | { | |
497 | /* | |
498 | * This format has been mandated by the IEEE specifications, | |
499 | * so this line may not be changed to use the __set_bit() format. | |
500 | */ | |
501 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
502 | } | |
503 | ||
504 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
505 | { | |
506 | /* | |
507 | * This format has been mandated by the IEEE specifications, | |
508 | * so this line may not be changed to use the __clear_bit() format. | |
509 | */ | |
510 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
511 | } | |
512 | ||
513 | static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss, | |
514 | struct sta_info *sta) | |
515 | { | |
3e122be0 JB |
516 | BUG_ON(!bss); |
517 | ||
17741cdc | 518 | __bss_tim_set(bss, sta->sta.aid); |
3e122be0 | 519 | |
d0709a65 JB |
520 | if (sta->local->ops->set_tim) { |
521 | sta->local->tim_in_locked_section = true; | |
24487981 | 522 | drv_set_tim(sta->local, &sta->sta, true); |
d0709a65 JB |
523 | sta->local->tim_in_locked_section = false; |
524 | } | |
004c872e JB |
525 | } |
526 | ||
527 | void sta_info_set_tim_bit(struct sta_info *sta) | |
528 | { | |
d0709a65 | 529 | unsigned long flags; |
004c872e | 530 | |
3e122be0 JB |
531 | BUG_ON(!sta->sdata->bss); |
532 | ||
d0709a65 JB |
533 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
534 | __sta_info_set_tim_bit(sta->sdata->bss, sta); | |
535 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
536 | } |
537 | ||
538 | static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss, | |
539 | struct sta_info *sta) | |
540 | { | |
3e122be0 JB |
541 | BUG_ON(!bss); |
542 | ||
17741cdc | 543 | __bss_tim_clear(bss, sta->sta.aid); |
3e122be0 | 544 | |
d0709a65 JB |
545 | if (sta->local->ops->set_tim) { |
546 | sta->local->tim_in_locked_section = true; | |
24487981 | 547 | drv_set_tim(sta->local, &sta->sta, false); |
d0709a65 JB |
548 | sta->local->tim_in_locked_section = false; |
549 | } | |
004c872e JB |
550 | } |
551 | ||
552 | void sta_info_clear_tim_bit(struct sta_info *sta) | |
553 | { | |
d0709a65 | 554 | unsigned long flags; |
004c872e | 555 | |
3e122be0 JB |
556 | BUG_ON(!sta->sdata->bss); |
557 | ||
d0709a65 JB |
558 | spin_lock_irqsave(&sta->local->sta_lock, flags); |
559 | __sta_info_clear_tim_bit(sta->sdata->bss, sta); | |
560 | spin_unlock_irqrestore(&sta->local->sta_lock, flags); | |
004c872e JB |
561 | } |
562 | ||
57c4d7b4 JB |
563 | static int sta_info_buffer_expired(struct sta_info *sta, |
564 | struct sk_buff *skb) | |
f0706e82 | 565 | { |
e039fa4a | 566 | struct ieee80211_tx_info *info; |
f0706e82 JB |
567 | int timeout; |
568 | ||
569 | if (!skb) | |
570 | return 0; | |
571 | ||
e039fa4a | 572 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
573 | |
574 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
575 | timeout = (sta->listen_interval * |
576 | sta->sdata->vif.bss_conf.beacon_int * | |
577 | 32 / 15625) * HZ; | |
f0706e82 JB |
578 | if (timeout < STA_TX_BUFFER_EXPIRE) |
579 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 580 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
581 | } |
582 | ||
583 | ||
3393a608 | 584 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, |
f0706e82 JB |
585 | struct sta_info *sta) |
586 | { | |
587 | unsigned long flags; | |
588 | struct sk_buff *skb; | |
589 | ||
590 | if (skb_queue_empty(&sta->ps_tx_buf)) | |
3393a608 | 591 | return false; |
f0706e82 JB |
592 | |
593 | for (;;) { | |
594 | spin_lock_irqsave(&sta->ps_tx_buf.lock, flags); | |
595 | skb = skb_peek(&sta->ps_tx_buf); | |
57c4d7b4 | 596 | if (sta_info_buffer_expired(sta, skb)) |
f0706e82 | 597 | skb = __skb_dequeue(&sta->ps_tx_buf); |
836341a7 | 598 | else |
f0706e82 JB |
599 | skb = NULL; |
600 | spin_unlock_irqrestore(&sta->ps_tx_buf.lock, flags); | |
601 | ||
836341a7 | 602 | if (!skb) |
f0706e82 | 603 | break; |
836341a7 | 604 | |
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 | ||
dcf55fb5 FF |
612 | if (skb_queue_empty(&sta->ps_tx_buf) && |
613 | !test_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF)) | |
004c872e | 614 | sta_info_clear_tim_bit(sta); |
f0706e82 | 615 | } |
3393a608 JO |
616 | |
617 | return true; | |
f0706e82 JB |
618 | } |
619 | ||
34e89507 | 620 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 621 | { |
34e89507 JB |
622 | struct ieee80211_local *local; |
623 | struct ieee80211_sub_if_data *sdata; | |
624 | struct sk_buff *skb; | |
625 | unsigned long flags; | |
e31b8213 | 626 | int ret, i; |
f0706e82 | 627 | |
34e89507 | 628 | might_sleep(); |
f0706e82 | 629 | |
34e89507 JB |
630 | if (!sta) |
631 | return -ENOENT; | |
5bb644a0 | 632 | |
34e89507 JB |
633 | local = sta->local; |
634 | sdata = sta->sdata; | |
f0706e82 | 635 | |
098a6070 JB |
636 | /* |
637 | * Before removing the station from the driver and | |
638 | * rate control, it might still start new aggregation | |
639 | * sessions -- block that to make sure the tear-down | |
640 | * will be sufficient. | |
641 | */ | |
642 | set_sta_flags(sta, WLAN_STA_BLOCK_BA); | |
53f73c09 | 643 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 644 | |
34e89507 JB |
645 | spin_lock_irqsave(&local->sta_lock, flags); |
646 | ret = sta_info_hash_del(local, sta); | |
647 | /* this might still be the pending list ... which is fine */ | |
648 | if (!ret) | |
649 | list_del(&sta->list); | |
650 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
651 | if (ret) | |
652 | return ret; | |
653 | ||
8cb23153 | 654 | mutex_lock(&local->key_mtx); |
e31b8213 | 655 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 656 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 657 | if (sta->ptk) |
40b275b6 | 658 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 659 | mutex_unlock(&local->key_mtx); |
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 | ||
dcf55fb5 | 899 | clear_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF); |
d057e5a3 AN |
900 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
901 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 JB |
902 | |
903 | if (!skb_queue_empty(&sta->ps_tx_buf)) | |
904 | sta_info_clear_tim_bit(sta); | |
905 | ||
906 | /* Send all buffered frames to the station */ | |
907 | sent = ieee80211_add_pending_skbs(local, &sta->tx_filtered); | |
50a9432d JB |
908 | buffered = ieee80211_add_pending_skbs_fn(local, &sta->ps_tx_buf, |
909 | clear_sta_ps_flags, sta); | |
af818581 JB |
910 | sent += buffered; |
911 | local->total_ps_buffered -= buffered; | |
912 | ||
913 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
914 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 915 | "since STA not sleeping anymore\n", sdata->name, |
af818581 JB |
916 | sta->sta.addr, sta->sta.aid, sent - buffered, buffered); |
917 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
918 | } | |
919 | ||
920 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) | |
921 | { | |
922 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
923 | struct ieee80211_local *local = sdata->local; | |
924 | struct sk_buff *skb; | |
925 | int no_pending_pkts; | |
926 | ||
927 | skb = skb_dequeue(&sta->tx_filtered); | |
928 | if (!skb) { | |
929 | skb = skb_dequeue(&sta->ps_tx_buf); | |
930 | if (skb) | |
931 | local->total_ps_buffered--; | |
932 | } | |
933 | no_pending_pkts = skb_queue_empty(&sta->tx_filtered) && | |
934 | skb_queue_empty(&sta->ps_tx_buf); | |
935 | ||
936 | if (skb) { | |
937 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
938 | struct ieee80211_hdr *hdr = | |
939 | (struct ieee80211_hdr *) skb->data; | |
940 | ||
941 | /* | |
942 | * Tell TX path to send this frame even though the STA may | |
943 | * still remain is PS mode after this frame exchange. | |
944 | */ | |
945 | info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE; | |
946 | ||
947 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
948 | printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n", | |
949 | sta->sta.addr, sta->sta.aid, | |
950 | skb_queue_len(&sta->ps_tx_buf)); | |
951 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
952 | ||
953 | /* Use MoreData flag to indicate whether there are more | |
954 | * buffered frames for this STA */ | |
955 | if (no_pending_pkts) | |
956 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
957 | else | |
958 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
959 | ||
960 | ieee80211_add_pending_skb(local, skb); | |
961 | ||
962 | if (no_pending_pkts) | |
963 | sta_info_clear_tim_bit(sta); | |
964 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
965 | } else { | |
966 | /* | |
967 | * FIXME: This can be the result of a race condition between | |
968 | * us expiring a frame and the station polling for it. | |
969 | * Should we send it a null-func frame indicating we | |
970 | * have nothing buffered for it? | |
971 | */ | |
972 | printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " | |
973 | "though there are no buffered frames for it\n", | |
47846c9b | 974 | sdata->name, sta->sta.addr); |
af818581 JB |
975 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
976 | } | |
977 | } | |
978 | ||
979 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, | |
980 | struct ieee80211_sta *pubsta, bool block) | |
981 | { | |
982 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
983 | ||
b5878a2d JB |
984 | trace_api_sta_block_awake(sta->local, pubsta, block); |
985 | ||
af818581 JB |
986 | if (block) |
987 | set_sta_flags(sta, WLAN_STA_PS_DRIVER); | |
50a9432d | 988 | else if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) |
af818581 JB |
989 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
990 | } | |
991 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 FF |
992 | |
993 | void ieee80211_sta_set_tim(struct ieee80211_sta *pubsta) | |
994 | { | |
995 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
996 | ||
997 | set_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF); | |
998 | sta_info_set_tim_bit(sta); | |
999 | } | |
1000 | EXPORT_SYMBOL(ieee80211_sta_set_tim); |