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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" |
ce662b44 | 27 | #include "wme.h" |
f0706e82 | 28 | |
d0709a65 JB |
29 | /** |
30 | * DOC: STA information lifetime rules | |
31 | * | |
32 | * STA info structures (&struct sta_info) are managed in a hash table | |
33 | * for faster lookup and a list for iteration. They are managed using | |
34 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
35 | * | |
34e89507 JB |
36 | * Upon allocating a STA info structure with sta_info_alloc(), the caller |
37 | * owns that structure. It must then insert it into the hash table using | |
38 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
39 | * case (which acquires an rcu read section but must not be called from | |
40 | * within one) will the pointer still be valid after the call. Note that | |
41 | * the caller may not do much with the STA info before inserting it, in | |
42 | * particular, it may not start any mesh peer link management or add | |
43 | * encryption keys. | |
93e5deb1 JB |
44 | * |
45 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
46 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 47 | * |
34e89507 | 48 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
49 | * peer. This means different things for the different type of interfaces |
50 | * we support. For a regular station this mean we add the AP sta when we | |
25985edc | 51 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 52 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 53 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 54 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 55 | * |
34e89507 JB |
56 | * In order to remove a STA info structure, various sta_info_destroy_*() |
57 | * calls are available. | |
d0709a65 | 58 | * |
34e89507 JB |
59 | * There is no concept of ownership on a STA entry, each structure is |
60 | * owned by the global hash table/list until it is removed. All users of | |
61 | * the structure need to be RCU protected so that the structure won't be | |
62 | * freed before they are done using it. | |
d0709a65 | 63 | */ |
f0706e82 JB |
64 | |
65 | /* Caller must hold local->sta_lock */ | |
be8755e1 MW |
66 | static int sta_info_hash_del(struct ieee80211_local *local, |
67 | struct sta_info *sta) | |
f0706e82 JB |
68 | { |
69 | struct sta_info *s; | |
70 | ||
40b275b6 JB |
71 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
72 | lockdep_is_held(&local->sta_lock)); | |
f0706e82 | 73 | if (!s) |
be8755e1 MW |
74 | return -ENOENT; |
75 | if (s == sta) { | |
a9b3cd7f | 76 | RCU_INIT_POINTER(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 77 | s->hnext); |
be8755e1 | 78 | return 0; |
f0706e82 JB |
79 | } |
80 | ||
40b275b6 JB |
81 | while (rcu_access_pointer(s->hnext) && |
82 | rcu_access_pointer(s->hnext) != sta) | |
83 | s = rcu_dereference_protected(s->hnext, | |
84 | lockdep_is_held(&local->sta_lock)); | |
85 | if (rcu_access_pointer(s->hnext)) { | |
a9b3cd7f | 86 | RCU_INIT_POINTER(s->hnext, sta->hnext); |
be8755e1 MW |
87 | return 0; |
88 | } | |
f0706e82 | 89 | |
be8755e1 | 90 | return -ENOENT; |
f0706e82 JB |
91 | } |
92 | ||
d0709a65 | 93 | /* protected by RCU */ |
abe60632 JB |
94 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
95 | const u8 *addr) | |
f0706e82 | 96 | { |
abe60632 | 97 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
98 | struct sta_info *sta; |
99 | ||
2a33bee2 GE |
100 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
101 | lockdep_is_held(&local->sta_lock) || | |
102 | lockdep_is_held(&local->sta_mtx)); | |
103 | while (sta) { | |
104 | if (sta->sdata == sdata && !sta->dummy && | |
105 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
106 | break; | |
107 | sta = rcu_dereference_check(sta->hnext, | |
108 | lockdep_is_held(&local->sta_lock) || | |
109 | lockdep_is_held(&local->sta_mtx)); | |
110 | } | |
111 | return sta; | |
112 | } | |
113 | ||
114 | /* get a station info entry even if it is a dummy station*/ | |
115 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, | |
116 | const u8 *addr) | |
117 | { | |
118 | struct ieee80211_local *local = sdata->local; | |
119 | struct sta_info *sta; | |
120 | ||
0379185b | 121 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b JB |
122 | lockdep_is_held(&local->sta_lock) || |
123 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 124 | while (sta) { |
abe60632 JB |
125 | if (sta->sdata == sdata && |
126 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
f0706e82 | 127 | break; |
0379185b | 128 | sta = rcu_dereference_check(sta->hnext, |
0379185b JB |
129 | lockdep_is_held(&local->sta_lock) || |
130 | lockdep_is_held(&local->sta_mtx)); | |
f0706e82 | 131 | } |
43ba7e95 JB |
132 | return sta; |
133 | } | |
134 | ||
0e5ded5a FF |
135 | /* |
136 | * Get sta info either from the specified interface | |
137 | * or from one of its vlans | |
138 | */ | |
139 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
140 | const u8 *addr) | |
141 | { | |
142 | struct ieee80211_local *local = sdata->local; | |
143 | struct sta_info *sta; | |
144 | ||
2a33bee2 GE |
145 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
146 | lockdep_is_held(&local->sta_lock) || | |
147 | lockdep_is_held(&local->sta_mtx)); | |
148 | while (sta) { | |
149 | if ((sta->sdata == sdata || | |
150 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && | |
151 | !sta->dummy && | |
152 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) | |
153 | break; | |
154 | sta = rcu_dereference_check(sta->hnext, | |
155 | lockdep_is_held(&local->sta_lock) || | |
156 | lockdep_is_held(&local->sta_mtx)); | |
157 | } | |
158 | return sta; | |
159 | } | |
160 | ||
161 | /* | |
162 | * Get sta info either from the specified interface | |
163 | * or from one of its vlans (including dummy stations) | |
164 | */ | |
165 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, | |
166 | const u8 *addr) | |
167 | { | |
168 | struct ieee80211_local *local = sdata->local; | |
169 | struct sta_info *sta; | |
170 | ||
0379185b | 171 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b JB |
172 | lockdep_is_held(&local->sta_lock) || |
173 | lockdep_is_held(&local->sta_mtx)); | |
0e5ded5a FF |
174 | while (sta) { |
175 | if ((sta->sdata == sdata || | |
a2c1e3da | 176 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
0e5ded5a FF |
177 | memcmp(sta->sta.addr, addr, ETH_ALEN) == 0) |
178 | break; | |
0379185b | 179 | sta = rcu_dereference_check(sta->hnext, |
0379185b JB |
180 | lockdep_is_held(&local->sta_lock) || |
181 | lockdep_is_held(&local->sta_mtx)); | |
0e5ded5a FF |
182 | } |
183 | return sta; | |
184 | } | |
185 | ||
3b53fde8 JB |
186 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
187 | int idx) | |
ee385855 | 188 | { |
3b53fde8 | 189 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
190 | struct sta_info *sta; |
191 | int i = 0; | |
192 | ||
d0709a65 | 193 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 194 | if (sdata != sta->sdata) |
2a8ca29a | 195 | continue; |
ee385855 LCC |
196 | if (i < idx) { |
197 | ++i; | |
198 | continue; | |
ee385855 | 199 | } |
2a8ca29a | 200 | return sta; |
ee385855 | 201 | } |
ee385855 LCC |
202 | |
203 | return NULL; | |
204 | } | |
f0706e82 | 205 | |
93e5deb1 JB |
206 | /** |
207 | * __sta_info_free - internal STA free helper | |
208 | * | |
6ef307bc | 209 | * @local: pointer to the global information |
93e5deb1 JB |
210 | * @sta: STA info to free |
211 | * | |
212 | * This function must undo everything done by sta_info_alloc() | |
213 | * that may happen before sta_info_insert(). | |
214 | */ | |
215 | static void __sta_info_free(struct ieee80211_local *local, | |
216 | struct sta_info *sta) | |
217 | { | |
af65cd96 JB |
218 | if (sta->rate_ctrl) { |
219 | rate_control_free_sta(sta); | |
220 | rate_control_put(sta->rate_ctrl); | |
221 | } | |
93e5deb1 JB |
222 | |
223 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 224 | wiphy_debug(local->hw.wiphy, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
225 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
226 | ||
227 | kfree(sta); | |
228 | } | |
229 | ||
d0709a65 JB |
230 | /* Caller must hold local->sta_lock */ |
231 | static void sta_info_hash_add(struct ieee80211_local *local, | |
232 | struct sta_info *sta) | |
f0706e82 | 233 | { |
17741cdc | 234 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
a9b3cd7f | 235 | RCU_INIT_POINTER(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 236 | } |
f0706e82 | 237 | |
af818581 JB |
238 | static void sta_unblock(struct work_struct *wk) |
239 | { | |
240 | struct sta_info *sta; | |
241 | ||
242 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
243 | ||
244 | if (sta->dead) | |
245 | return; | |
246 | ||
c2c98fde | 247 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) |
af818581 | 248 | ieee80211_sta_ps_deliver_wakeup(sta); |
c2c98fde JB |
249 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { |
250 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
251 | |
252 | local_bh_disable(); | |
af818581 | 253 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 254 | local_bh_enable(); |
c2c98fde JB |
255 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
256 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
257 | |
258 | local_bh_disable(); | |
47086fc5 | 259 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 260 | local_bh_enable(); |
50a9432d | 261 | } else |
c2c98fde | 262 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
263 | } |
264 | ||
af65cd96 JB |
265 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
266 | struct sta_info *sta, gfp_t gfp) | |
267 | { | |
268 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
269 | return 0; | |
270 | ||
271 | sta->rate_ctrl = rate_control_get(local->rate_ctrl); | |
272 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, | |
273 | &sta->sta, gfp); | |
274 | if (!sta->rate_ctrl_priv) { | |
275 | rate_control_put(sta->rate_ctrl); | |
276 | return -ENOMEM; | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
73651ee6 JB |
282 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
283 | u8 *addr, gfp_t gfp) | |
f0706e82 | 284 | { |
d0709a65 | 285 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 286 | struct sta_info *sta; |
ebe27c91 | 287 | struct timespec uptime; |
16c5f15c | 288 | int i; |
f0706e82 | 289 | |
17741cdc | 290 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 291 | if (!sta) |
73651ee6 | 292 | return NULL; |
f0706e82 | 293 | |
07346f81 | 294 | spin_lock_init(&sta->lock); |
af818581 | 295 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 296 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 297 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 298 | |
17741cdc | 299 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
300 | sta->local = local; |
301 | sta->sdata = sdata; | |
8bc8aecd | 302 | sta->last_rx = jiffies; |
f0706e82 | 303 | |
ebe27c91 MSS |
304 | do_posix_clock_monotonic_gettime(&uptime); |
305 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
306 | ewma_init(&sta->avg_signal, 1024, 8); |
307 | ||
af65cd96 | 308 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 309 | kfree(sta); |
73651ee6 | 310 | return NULL; |
f0706e82 JB |
311 | } |
312 | ||
16c5f15c | 313 | for (i = 0; i < STA_TID_NUM; i++) { |
a622ab72 JB |
314 | /* |
315 | * timer_to_tid must be initialized with identity mapping | |
316 | * to enable session_timer's data differentiation. See | |
317 | * sta_rx_agg_session_timer_expired for usage. | |
318 | */ | |
16c5f15c | 319 | sta->timer_to_tid[i] = i; |
16c5f15c | 320 | } |
948d887d JB |
321 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
322 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
323 | skb_queue_head_init(&sta->tx_filtered[i]); | |
324 | } | |
73651ee6 | 325 | |
cccaec98 | 326 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
4be929be | 327 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 328 | |
73651ee6 | 329 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0fb9a9ec | 330 | wiphy_debug(local->hw.wiphy, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
331 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
332 | ||
03e4497e | 333 | #ifdef CONFIG_MAC80211_MESH |
57cf8043 | 334 | sta->plink_state = NL80211_PLINK_LISTEN; |
03e4497e JB |
335 | init_timer(&sta->plink_timer); |
336 | #endif | |
337 | ||
73651ee6 JB |
338 | return sta; |
339 | } | |
340 | ||
2a33bee2 GE |
341 | static int sta_info_finish_insert(struct sta_info *sta, |
342 | bool async, bool dummy_reinsert) | |
73651ee6 JB |
343 | { |
344 | struct ieee80211_local *local = sta->local; | |
345 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
98b62183 | 346 | struct station_info sinfo; |
73651ee6 | 347 | unsigned long flags; |
93e5deb1 | 348 | int err = 0; |
73651ee6 | 349 | |
46a5ebaf | 350 | lockdep_assert_held(&local->sta_mtx); |
34e89507 | 351 | |
2a33bee2 GE |
352 | if (!sta->dummy || dummy_reinsert) { |
353 | /* notify driver */ | |
354 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
355 | sdata = container_of(sdata->bss, | |
356 | struct ieee80211_sub_if_data, | |
357 | u.ap); | |
358 | err = drv_sta_add(local, sdata, &sta->sta); | |
359 | if (err) { | |
360 | if (!async) | |
361 | return err; | |
362 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to " | |
363 | "driver (%d) - keeping it anyway.\n", | |
364 | sdata->name, sta->sta.addr, err); | |
365 | } else { | |
366 | sta->uploaded = true; | |
34e89507 | 367 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
368 | if (async) |
369 | wiphy_debug(local->hw.wiphy, | |
370 | "Finished adding IBSS STA %pM\n", | |
371 | sta->sta.addr); | |
34e89507 | 372 | #endif |
2a33bee2 GE |
373 | } |
374 | ||
375 | sdata = sta->sdata; | |
34e89507 JB |
376 | } |
377 | ||
2a33bee2 GE |
378 | if (!dummy_reinsert) { |
379 | if (!async) { | |
380 | local->num_sta++; | |
381 | local->sta_generation++; | |
382 | smp_mb(); | |
34e89507 | 383 | |
2a33bee2 GE |
384 | /* make the station visible */ |
385 | spin_lock_irqsave(&local->sta_lock, flags); | |
386 | sta_info_hash_add(local, sta); | |
387 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
388 | } | |
34e89507 | 389 | |
2a33bee2 GE |
390 | list_add(&sta->list, &local->sta_list); |
391 | } else { | |
392 | sta->dummy = false; | |
34e89507 JB |
393 | } |
394 | ||
2a33bee2 GE |
395 | if (!sta->dummy) { |
396 | ieee80211_sta_debugfs_add(sta); | |
397 | rate_control_add_sta_debugfs(sta); | |
34e89507 | 398 | |
2a33bee2 GE |
399 | memset(&sinfo, 0, sizeof(sinfo)); |
400 | sinfo.filled = 0; | |
401 | sinfo.generation = local->sta_generation; | |
402 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
403 | } | |
34e89507 JB |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static void sta_info_finish_pending(struct ieee80211_local *local) | |
409 | { | |
410 | struct sta_info *sta; | |
411 | unsigned long flags; | |
412 | ||
413 | spin_lock_irqsave(&local->sta_lock, flags); | |
414 | while (!list_empty(&local->sta_pending_list)) { | |
415 | sta = list_first_entry(&local->sta_pending_list, | |
416 | struct sta_info, list); | |
417 | list_del(&sta->list); | |
418 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
419 | ||
2a33bee2 | 420 | sta_info_finish_insert(sta, true, false); |
34e89507 JB |
421 | |
422 | spin_lock_irqsave(&local->sta_lock, flags); | |
423 | } | |
424 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
425 | } | |
426 | ||
427 | static void sta_info_finish_work(struct work_struct *work) | |
428 | { | |
429 | struct ieee80211_local *local = | |
430 | container_of(work, struct ieee80211_local, sta_finish_work); | |
431 | ||
432 | mutex_lock(&local->sta_mtx); | |
433 | sta_info_finish_pending(local); | |
434 | mutex_unlock(&local->sta_mtx); | |
435 | } | |
436 | ||
8c71df7a | 437 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 438 | { |
34e89507 | 439 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 440 | |
03e4497e JB |
441 | /* |
442 | * Can't be a WARN_ON because it can be triggered through a race: | |
443 | * something inserts a STA (on one CPU) without holding the RTNL | |
444 | * and another CPU turns off the net device. | |
445 | */ | |
8c71df7a GE |
446 | if (unlikely(!ieee80211_sdata_running(sdata))) |
447 | return -ENETDOWN; | |
03e4497e | 448 | |
47846c9b | 449 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
8c71df7a GE |
450 | is_multicast_ether_addr(sta->sta.addr))) |
451 | return -EINVAL; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
456 | static int sta_info_insert_ibss(struct sta_info *sta) __acquires(RCU) | |
457 | { | |
458 | struct ieee80211_local *local = sta->local; | |
459 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
460 | unsigned long flags; | |
461 | ||
462 | spin_lock_irqsave(&local->sta_lock, flags); | |
463 | /* check if STA exists already */ | |
2a33bee2 | 464 | if (sta_info_get_bss_rx(sdata, sta->sta.addr)) { |
8c71df7a | 465 | spin_unlock_irqrestore(&local->sta_lock, flags); |
34e89507 | 466 | rcu_read_lock(); |
8c71df7a | 467 | return -EEXIST; |
93e5deb1 | 468 | } |
44213b5e | 469 | |
8c71df7a GE |
470 | local->num_sta++; |
471 | local->sta_generation++; | |
472 | smp_mb(); | |
473 | sta_info_hash_add(local, sta); | |
34e89507 | 474 | |
8c71df7a | 475 | list_add_tail(&sta->list, &local->sta_pending_list); |
34e89507 | 476 | |
8c71df7a GE |
477 | rcu_read_lock(); |
478 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
34e89507 JB |
479 | |
480 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
8c71df7a GE |
481 | wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", |
482 | sta->sta.addr); | |
34e89507 JB |
483 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
484 | ||
8c71df7a | 485 | ieee80211_queue_work(&local->hw, &local->sta_finish_work); |
34e89507 | 486 | |
8c71df7a GE |
487 | return 0; |
488 | } | |
489 | ||
490 | /* | |
491 | * should be called with sta_mtx locked | |
492 | * this function replaces the mutex lock | |
493 | * with a RCU lock | |
494 | */ | |
495 | static int sta_info_insert_non_ibss(struct sta_info *sta) __acquires(RCU) | |
496 | { | |
497 | struct ieee80211_local *local = sta->local; | |
498 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
499 | unsigned long flags; | |
2a33bee2 GE |
500 | struct sta_info *exist_sta; |
501 | bool dummy_reinsert = false; | |
8c71df7a GE |
502 | int err = 0; |
503 | ||
504 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 JB |
505 | |
506 | /* | |
507 | * On first glance, this will look racy, because the code | |
8c71df7a | 508 | * in this function, which inserts a station with sleeping, |
34e89507 JB |
509 | * unlocks the sta_lock between checking existence in the |
510 | * hash table and inserting into it. | |
511 | * | |
512 | * However, it is not racy against itself because it keeps | |
8c71df7a | 513 | * the mutex locked. |
34e89507 JB |
514 | */ |
515 | ||
d0709a65 | 516 | spin_lock_irqsave(&local->sta_lock, flags); |
2a33bee2 GE |
517 | /* |
518 | * check if STA exists already. | |
519 | * only accept a scenario of a second call to sta_info_insert_non_ibss | |
520 | * with a dummy station entry that was inserted earlier | |
521 | * in that case - assume that the dummy station flag should | |
522 | * be removed. | |
523 | */ | |
524 | exist_sta = sta_info_get_bss_rx(sdata, sta->sta.addr); | |
525 | if (exist_sta) { | |
526 | if (exist_sta == sta && sta->dummy) { | |
527 | dummy_reinsert = true; | |
528 | } else { | |
529 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
530 | mutex_unlock(&local->sta_mtx); | |
531 | rcu_read_lock(); | |
532 | return -EEXIST; | |
533 | } | |
43ba7e95 | 534 | } |
32bfd35d | 535 | |
34e89507 | 536 | spin_unlock_irqrestore(&local->sta_lock, flags); |
32bfd35d | 537 | |
2a33bee2 | 538 | err = sta_info_finish_insert(sta, false, dummy_reinsert); |
34e89507 JB |
539 | if (err) { |
540 | mutex_unlock(&local->sta_mtx); | |
541 | rcu_read_lock(); | |
8c71df7a | 542 | return err; |
32bfd35d | 543 | } |
d0709a65 | 544 | |
f0706e82 | 545 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
546 | wiphy_debug(local->hw.wiphy, "Inserted %sSTA %pM\n", |
547 | sta->dummy ? "dummy " : "", sta->sta.addr); | |
f0706e82 JB |
548 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
549 | ||
34e89507 JB |
550 | /* move reference to rcu-protected */ |
551 | rcu_read_lock(); | |
552 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 553 | |
73651ee6 JB |
554 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
555 | mesh_accept_plinks_update(sdata); | |
556 | ||
8c71df7a GE |
557 | return 0; |
558 | } | |
559 | ||
560 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
561 | { | |
562 | struct ieee80211_local *local = sta->local; | |
563 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
564 | int err = 0; | |
565 | ||
566 | err = sta_info_insert_check(sta); | |
567 | if (err) { | |
568 | rcu_read_lock(); | |
569 | goto out_free; | |
570 | } | |
571 | ||
572 | /* | |
573 | * In ad-hoc mode, we sometimes need to insert stations | |
574 | * from tasklet context from the RX path. To avoid races, | |
575 | * always do so in that case -- see the comment below. | |
576 | */ | |
577 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
578 | err = sta_info_insert_ibss(sta); | |
579 | if (err) | |
580 | goto out_free; | |
581 | ||
582 | return 0; | |
583 | } | |
584 | ||
585 | /* | |
586 | * It might seem that the function called below is in race against | |
587 | * the function call above that atomically inserts the station... That, | |
588 | * however, is not true because the above code can only | |
589 | * be invoked for IBSS interfaces, and the below code will | |
590 | * not be -- and the two do not race against each other as | |
591 | * the hash table also keys off the interface. | |
592 | */ | |
593 | ||
594 | might_sleep(); | |
595 | ||
596 | mutex_lock(&local->sta_mtx); | |
597 | ||
598 | err = sta_info_insert_non_ibss(sta); | |
599 | if (err) | |
600 | goto out_free; | |
601 | ||
73651ee6 | 602 | return 0; |
93e5deb1 JB |
603 | out_free: |
604 | BUG_ON(!err); | |
605 | __sta_info_free(local, sta); | |
606 | return err; | |
f0706e82 JB |
607 | } |
608 | ||
34e89507 JB |
609 | int sta_info_insert(struct sta_info *sta) |
610 | { | |
611 | int err = sta_info_insert_rcu(sta); | |
612 | ||
613 | rcu_read_unlock(); | |
614 | ||
615 | return err; | |
616 | } | |
617 | ||
2a33bee2 GE |
618 | /* Caller must hold sta->local->sta_mtx */ |
619 | int sta_info_reinsert(struct sta_info *sta) | |
620 | { | |
621 | struct ieee80211_local *local = sta->local; | |
622 | int err = 0; | |
623 | ||
624 | err = sta_info_insert_check(sta); | |
625 | if (err) { | |
626 | mutex_unlock(&local->sta_mtx); | |
627 | return err; | |
628 | } | |
629 | ||
630 | might_sleep(); | |
631 | ||
632 | err = sta_info_insert_non_ibss(sta); | |
633 | rcu_read_unlock(); | |
634 | return err; | |
635 | } | |
636 | ||
004c872e JB |
637 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
638 | { | |
639 | /* | |
640 | * This format has been mandated by the IEEE specifications, | |
641 | * so this line may not be changed to use the __set_bit() format. | |
642 | */ | |
643 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
644 | } | |
645 | ||
646 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
647 | { | |
648 | /* | |
649 | * This format has been mandated by the IEEE specifications, | |
650 | * so this line may not be changed to use the __clear_bit() format. | |
651 | */ | |
652 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
653 | } | |
654 | ||
948d887d | 655 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 656 | { |
948d887d JB |
657 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
658 | switch (ac) { | |
659 | case IEEE80211_AC_VO: | |
660 | return BIT(6) | BIT(7); | |
661 | case IEEE80211_AC_VI: | |
662 | return BIT(4) | BIT(5); | |
663 | case IEEE80211_AC_BE: | |
664 | return BIT(0) | BIT(3); | |
665 | case IEEE80211_AC_BK: | |
666 | return BIT(1) | BIT(2); | |
667 | default: | |
668 | WARN_ON(1); | |
669 | return 0; | |
d0709a65 | 670 | } |
004c872e JB |
671 | } |
672 | ||
c868cb35 | 673 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 674 | { |
c868cb35 JB |
675 | struct ieee80211_local *local = sta->local; |
676 | struct ieee80211_if_ap *bss = sta->sdata->bss; | |
d0709a65 | 677 | unsigned long flags; |
948d887d JB |
678 | bool indicate_tim = false; |
679 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
680 | int ac; | |
004c872e | 681 | |
c868cb35 JB |
682 | if (WARN_ON_ONCE(!sta->sdata->bss)) |
683 | return; | |
3e122be0 | 684 | |
c868cb35 JB |
685 | /* No need to do anything if the driver does all */ |
686 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
687 | return; | |
004c872e | 688 | |
c868cb35 JB |
689 | if (sta->dead) |
690 | goto done; | |
3e122be0 | 691 | |
948d887d JB |
692 | /* |
693 | * If all ACs are delivery-enabled then we should build | |
694 | * the TIM bit for all ACs anyway; if only some are then | |
695 | * we ignore those and build the TIM bit using only the | |
696 | * non-enabled ones. | |
697 | */ | |
698 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
699 | ignore_for_tim = 0; | |
700 | ||
701 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
702 | unsigned long tids; | |
3e122be0 | 703 | |
948d887d JB |
704 | if (ignore_for_tim & BIT(ac)) |
705 | continue; | |
706 | ||
707 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
708 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
709 | if (indicate_tim) | |
710 | break; | |
3e122be0 | 711 | |
948d887d JB |
712 | tids = ieee80211_tids_for_ac(ac); |
713 | ||
714 | indicate_tim |= | |
715 | sta->driver_buffered_tids & tids; | |
d0709a65 | 716 | } |
004c872e | 717 | |
c868cb35 JB |
718 | done: |
719 | spin_lock_irqsave(&local->sta_lock, flags); | |
004c872e | 720 | |
948d887d | 721 | if (indicate_tim) |
c868cb35 JB |
722 | __bss_tim_set(bss, sta->sta.aid); |
723 | else | |
724 | __bss_tim_clear(bss, sta->sta.aid); | |
004c872e | 725 | |
c868cb35 JB |
726 | if (local->ops->set_tim) { |
727 | local->tim_in_locked_section = true; | |
948d887d | 728 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
729 | local->tim_in_locked_section = false; |
730 | } | |
3e122be0 | 731 | |
c868cb35 | 732 | spin_unlock_irqrestore(&local->sta_lock, flags); |
004c872e JB |
733 | } |
734 | ||
cd0b8d89 | 735 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 736 | { |
e039fa4a | 737 | struct ieee80211_tx_info *info; |
f0706e82 JB |
738 | int timeout; |
739 | ||
740 | if (!skb) | |
cd0b8d89 | 741 | return false; |
f0706e82 | 742 | |
e039fa4a | 743 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
744 | |
745 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
746 | timeout = (sta->listen_interval * |
747 | sta->sdata->vif.bss_conf.beacon_int * | |
748 | 32 / 15625) * HZ; | |
f0706e82 JB |
749 | if (timeout < STA_TX_BUFFER_EXPIRE) |
750 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 751 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
752 | } |
753 | ||
754 | ||
948d887d JB |
755 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
756 | struct sta_info *sta, int ac) | |
f0706e82 JB |
757 | { |
758 | unsigned long flags; | |
759 | struct sk_buff *skb; | |
760 | ||
60750397 JB |
761 | /* |
762 | * First check for frames that should expire on the filtered | |
763 | * queue. Frames here were rejected by the driver and are on | |
764 | * a separate queue to avoid reordering with normal PS-buffered | |
765 | * frames. They also aren't accounted for right now in the | |
766 | * total_ps_buffered counter. | |
767 | */ | |
768 | for (;;) { | |
948d887d JB |
769 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
770 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 771 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 772 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
773 | else |
774 | skb = NULL; | |
948d887d | 775 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
776 | |
777 | /* | |
778 | * Frames are queued in order, so if this one | |
779 | * hasn't expired yet we can stop testing. If | |
780 | * we actually reached the end of the queue we | |
781 | * also need to stop, of course. | |
782 | */ | |
783 | if (!skb) | |
784 | break; | |
785 | dev_kfree_skb(skb); | |
786 | } | |
787 | ||
788 | /* | |
789 | * Now also check the normal PS-buffered queue, this will | |
790 | * only find something if the filtered queue was emptied | |
791 | * since the filtered frames are all before the normal PS | |
792 | * buffered frames. | |
793 | */ | |
f0706e82 | 794 | for (;;) { |
948d887d JB |
795 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
796 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 797 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 798 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 799 | else |
f0706e82 | 800 | skb = NULL; |
948d887d | 801 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 802 | |
60750397 JB |
803 | /* |
804 | * frames are queued in order, so if this one | |
805 | * hasn't expired yet (or we reached the end of | |
806 | * the queue) we can stop testing | |
807 | */ | |
836341a7 | 808 | if (!skb) |
f0706e82 | 809 | break; |
836341a7 | 810 | |
836341a7 | 811 | local->total_ps_buffered--; |
f4ea83dd | 812 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
813 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
814 | sta->sta.addr); | |
f4ea83dd | 815 | #endif |
836341a7 | 816 | dev_kfree_skb(skb); |
f0706e82 | 817 | } |
3393a608 | 818 | |
60750397 JB |
819 | /* |
820 | * Finally, recalculate the TIM bit for this station -- it might | |
821 | * now be clear because the station was too slow to retrieve its | |
822 | * frames. | |
823 | */ | |
824 | sta_info_recalc_tim(sta); | |
825 | ||
826 | /* | |
827 | * Return whether there are any frames still buffered, this is | |
828 | * used to check whether the cleanup timer still needs to run, | |
829 | * if there are no frames we don't need to rearm the timer. | |
830 | */ | |
948d887d JB |
831 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
832 | skb_queue_empty(&sta->tx_filtered[ac])); | |
833 | } | |
834 | ||
835 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
836 | struct sta_info *sta) | |
837 | { | |
838 | bool have_buffered = false; | |
839 | int ac; | |
840 | ||
841 | /* This is only necessary for stations on BSS interfaces */ | |
842 | if (!sta->sdata->bss) | |
843 | return false; | |
844 | ||
845 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
846 | have_buffered |= | |
847 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
848 | ||
849 | return have_buffered; | |
f0706e82 JB |
850 | } |
851 | ||
34e89507 | 852 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 853 | { |
34e89507 JB |
854 | struct ieee80211_local *local; |
855 | struct ieee80211_sub_if_data *sdata; | |
34e89507 | 856 | unsigned long flags; |
948d887d | 857 | int ret, i, ac; |
f0706e82 | 858 | |
34e89507 | 859 | might_sleep(); |
f0706e82 | 860 | |
34e89507 JB |
861 | if (!sta) |
862 | return -ENOENT; | |
5bb644a0 | 863 | |
34e89507 JB |
864 | local = sta->local; |
865 | sdata = sta->sdata; | |
f0706e82 | 866 | |
098a6070 JB |
867 | /* |
868 | * Before removing the station from the driver and | |
869 | * rate control, it might still start new aggregation | |
870 | * sessions -- block that to make sure the tear-down | |
871 | * will be sufficient. | |
872 | */ | |
c2c98fde | 873 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 874 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 875 | |
34e89507 JB |
876 | spin_lock_irqsave(&local->sta_lock, flags); |
877 | ret = sta_info_hash_del(local, sta); | |
878 | /* this might still be the pending list ... which is fine */ | |
879 | if (!ret) | |
880 | list_del(&sta->list); | |
881 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
882 | if (ret) | |
883 | return ret; | |
884 | ||
8cb23153 | 885 | mutex_lock(&local->key_mtx); |
e31b8213 | 886 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 887 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 888 | if (sta->ptk) |
40b275b6 | 889 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 890 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
891 | |
892 | sta->dead = true; | |
893 | ||
c2c98fde JB |
894 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
895 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { | |
34e89507 JB |
896 | BUG_ON(!sdata->bss); |
897 | ||
c2c98fde JB |
898 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
899 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
900 | ||
34e89507 | 901 | atomic_dec(&sdata->bss->num_sta_ps); |
c868cb35 | 902 | sta_info_recalc_tim(sta); |
34e89507 JB |
903 | } |
904 | ||
905 | local->num_sta--; | |
906 | local->sta_generation++; | |
907 | ||
908 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 909 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 JB |
910 | |
911 | if (sta->uploaded) { | |
912 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
913 | sdata = container_of(sdata->bss, | |
914 | struct ieee80211_sub_if_data, | |
915 | u.ap); | |
916 | drv_sta_remove(local, sdata, &sta->sta); | |
917 | sdata = sta->sdata; | |
918 | } | |
919 | ||
e64b3795 JB |
920 | /* |
921 | * At this point, after we wait for an RCU grace period, | |
922 | * neither mac80211 nor the driver can reference this | |
923 | * sta struct any more except by still existing timers | |
924 | * associated with this station that we clean up below. | |
925 | */ | |
926 | synchronize_rcu(); | |
927 | ||
948d887d JB |
928 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
929 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
930 | __skb_queue_purge(&sta->ps_tx_buf[ac]); | |
931 | __skb_queue_purge(&sta->tx_filtered[ac]); | |
932 | } | |
c868cb35 | 933 | |
34e89507 | 934 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 935 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 936 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
937 | #endif |
938 | ||
939 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 940 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
941 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
942 | cancel_work_sync(&sta->drv_unblock_wk); | |
943 | ||
ec15e68b JM |
944 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
945 | ||
34e89507 JB |
946 | rate_control_remove_sta_debugfs(sta); |
947 | ieee80211_sta_debugfs_remove(sta); | |
948 | ||
949 | #ifdef CONFIG_MAC80211_MESH | |
950 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
951 | mesh_plink_deactivate(sta); | |
952 | del_timer_sync(&sta->plink_timer); | |
953 | } | |
954 | #endif | |
955 | ||
34e89507 JB |
956 | __sta_info_free(local, sta); |
957 | ||
958 | return 0; | |
4d6141c3 JS |
959 | } |
960 | ||
34e89507 | 961 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 962 | { |
34e89507 JB |
963 | struct sta_info *sta; |
964 | int ret; | |
4d6141c3 | 965 | |
34e89507 | 966 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 967 | sta = sta_info_get_rx(sdata, addr); |
34e89507 JB |
968 | ret = __sta_info_destroy(sta); |
969 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
970 | |
971 | return ret; | |
972 | } | |
973 | ||
34e89507 JB |
974 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
975 | const u8 *addr) | |
e9f207f0 | 976 | { |
34e89507 JB |
977 | struct sta_info *sta; |
978 | int ret; | |
e9f207f0 | 979 | |
34e89507 | 980 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 981 | sta = sta_info_get_bss_rx(sdata, addr); |
34e89507 JB |
982 | ret = __sta_info_destroy(sta); |
983 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 984 | |
34e89507 JB |
985 | return ret; |
986 | } | |
e9f207f0 | 987 | |
34e89507 JB |
988 | static void sta_info_cleanup(unsigned long data) |
989 | { | |
990 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
991 | struct sta_info *sta; | |
3393a608 | 992 | bool timer_needed = false; |
34e89507 JB |
993 | |
994 | rcu_read_lock(); | |
995 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
996 | if (sta_info_cleanup_expire_buffered(local, sta)) |
997 | timer_needed = true; | |
34e89507 | 998 | rcu_read_unlock(); |
e9f207f0 | 999 | |
34e89507 JB |
1000 | if (local->quiescing) |
1001 | return; | |
d0709a65 | 1002 | |
3393a608 JO |
1003 | if (!timer_needed) |
1004 | return; | |
1005 | ||
26d59535 JB |
1006 | mod_timer(&local->sta_cleanup, |
1007 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 1008 | } |
e9f207f0 | 1009 | |
f0706e82 JB |
1010 | void sta_info_init(struct ieee80211_local *local) |
1011 | { | |
d0709a65 | 1012 | spin_lock_init(&local->sta_lock); |
34e89507 | 1013 | mutex_init(&local->sta_mtx); |
f0706e82 | 1014 | INIT_LIST_HEAD(&local->sta_list); |
34e89507 JB |
1015 | INIT_LIST_HEAD(&local->sta_pending_list); |
1016 | INIT_WORK(&local->sta_finish_work, sta_info_finish_work); | |
f0706e82 | 1017 | |
b24b8a24 PE |
1018 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
1019 | (unsigned long)local); | |
f0706e82 JB |
1020 | } |
1021 | ||
1022 | void sta_info_stop(struct ieee80211_local *local) | |
1023 | { | |
f0706e82 | 1024 | del_timer(&local->sta_cleanup); |
be8755e1 | 1025 | sta_info_flush(local, NULL); |
f0706e82 JB |
1026 | } |
1027 | ||
f0706e82 JB |
1028 | /** |
1029 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
1030 | * |
1031 | * Returns the number of removed STA entries. | |
1032 | * | |
f0706e82 | 1033 | * @local: local interface data |
d0709a65 | 1034 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 1035 | */ |
44213b5e | 1036 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 1037 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
1038 | { |
1039 | struct sta_info *sta, *tmp; | |
44213b5e | 1040 | int ret = 0; |
f0706e82 | 1041 | |
d0709a65 | 1042 | might_sleep(); |
be8755e1 | 1043 | |
34e89507 JB |
1044 | mutex_lock(&local->sta_mtx); |
1045 | ||
1046 | sta_info_finish_pending(local); | |
1047 | ||
d0709a65 | 1048 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
1049 | if (!sdata || sdata == sta->sdata) |
1050 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 1051 | } |
34e89507 | 1052 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
1053 | |
1054 | return ret; | |
f0706e82 | 1055 | } |
dc6676b7 | 1056 | |
24723d1b JB |
1057 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1058 | unsigned long exp_time) | |
1059 | { | |
1060 | struct ieee80211_local *local = sdata->local; | |
1061 | struct sta_info *sta, *tmp; | |
24723d1b | 1062 | |
34e89507 | 1063 | mutex_lock(&local->sta_mtx); |
24723d1b JB |
1064 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
1065 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
1066 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 1067 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 1068 | sdata->name, sta->sta.addr); |
24723d1b | 1069 | #endif |
34e89507 | 1070 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1071 | } |
34e89507 | 1072 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1073 | } |
17741cdc | 1074 | |
686b9cb9 BG |
1075 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1076 | const u8 *addr, | |
1077 | const u8 *localaddr) | |
17741cdc | 1078 | { |
abe60632 | 1079 | struct sta_info *sta, *nxt; |
17741cdc | 1080 | |
686b9cb9 BG |
1081 | /* |
1082 | * Just return a random station if localaddr is NULL | |
1083 | * ... first in list. | |
1084 | */ | |
f7c65594 | 1085 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
1086 | if (localaddr && |
1087 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
1088 | continue; | |
f7c65594 JB |
1089 | if (!sta->uploaded) |
1090 | return NULL; | |
abe60632 | 1091 | return &sta->sta; |
f7c65594 JB |
1092 | } |
1093 | ||
abe60632 | 1094 | return NULL; |
17741cdc | 1095 | } |
686b9cb9 | 1096 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1097 | |
1098 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1099 | const u8 *addr) | |
1100 | { | |
f7c65594 | 1101 | struct sta_info *sta; |
5ed176e1 JB |
1102 | |
1103 | if (!vif) | |
1104 | return NULL; | |
1105 | ||
f7c65594 JB |
1106 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1107 | if (!sta) | |
1108 | return NULL; | |
1109 | ||
1110 | if (!sta->uploaded) | |
1111 | return NULL; | |
5ed176e1 | 1112 | |
f7c65594 | 1113 | return &sta->sta; |
5ed176e1 | 1114 | } |
17741cdc | 1115 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1116 | |
50a9432d JB |
1117 | static void clear_sta_ps_flags(void *_sta) |
1118 | { | |
1119 | struct sta_info *sta = _sta; | |
1120 | ||
c2c98fde JB |
1121 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1122 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
50a9432d JB |
1123 | } |
1124 | ||
af818581 JB |
1125 | /* powersave support code */ |
1126 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1127 | { | |
1128 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1129 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1130 | struct sk_buff_head pending; |
1131 | int filtered = 0, buffered = 0, ac; | |
1132 | ||
c2c98fde | 1133 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1134 | |
948d887d JB |
1135 | BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1); |
1136 | sta->driver_buffered_tids = 0; | |
af818581 | 1137 | |
d057e5a3 AN |
1138 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1139 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1140 | |
948d887d | 1141 | skb_queue_head_init(&pending); |
af818581 JB |
1142 | |
1143 | /* Send all buffered frames to the station */ | |
948d887d JB |
1144 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1145 | int count = skb_queue_len(&pending), tmp; | |
1146 | ||
1147 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); | |
1148 | tmp = skb_queue_len(&pending); | |
1149 | filtered += tmp - count; | |
1150 | count = tmp; | |
1151 | ||
1152 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); | |
1153 | tmp = skb_queue_len(&pending); | |
1154 | buffered += tmp - count; | |
1155 | } | |
1156 | ||
1157 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1158 | ||
af818581 JB |
1159 | local->total_ps_buffered -= buffered; |
1160 | ||
c868cb35 JB |
1161 | sta_info_recalc_tim(sta); |
1162 | ||
af818581 JB |
1163 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
1164 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 1165 | "since STA not sleeping anymore\n", sdata->name, |
948d887d | 1166 | sta->sta.addr, sta->sta.aid, filtered, buffered); |
af818581 JB |
1167 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
1168 | } | |
1169 | ||
ce662b44 JB |
1170 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1171 | struct sta_info *sta, int tid, | |
40b96408 | 1172 | enum ieee80211_frame_release_type reason) |
af818581 | 1173 | { |
af818581 | 1174 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1175 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1176 | struct sk_buff *skb; |
ce662b44 JB |
1177 | int size = sizeof(*nullfunc); |
1178 | __le16 fc; | |
c2c98fde | 1179 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1180 | struct ieee80211_tx_info *info; |
af818581 | 1181 | |
ce662b44 JB |
1182 | if (qos) { |
1183 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1184 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1185 | IEEE80211_FCTL_FROMDS); | |
1186 | } else { | |
1187 | size -= 2; | |
1188 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1189 | IEEE80211_STYPE_NULLFUNC | | |
1190 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1191 | } |
af818581 | 1192 | |
ce662b44 JB |
1193 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1194 | if (!skb) | |
1195 | return; | |
1196 | ||
1197 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1198 | ||
1199 | nullfunc = (void *) skb_put(skb, size); | |
1200 | nullfunc->frame_control = fc; | |
1201 | nullfunc->duration_id = 0; | |
1202 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1203 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1204 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1205 | ||
59b66255 JB |
1206 | skb->priority = tid; |
1207 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1208 | if (qos) { |
ce662b44 JB |
1209 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1210 | ||
40b96408 | 1211 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1212 | nullfunc->qos_ctrl |= |
1213 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1214 | } | |
1215 | ||
1216 | info = IEEE80211_SKB_CB(skb); | |
1217 | ||
1218 | /* | |
1219 | * Tell TX path to send this frame even though the | |
1220 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1221 | * exchange. Also set EOSP to indicate this packet |
1222 | * ends the poll/service period. | |
ce662b44 | 1223 | */ |
deeaee19 JB |
1224 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE | |
1225 | IEEE80211_TX_STATUS_EOSP | | |
1226 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1227 | |
40b96408 JB |
1228 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1229 | ||
ce662b44 JB |
1230 | ieee80211_xmit(sdata, skb); |
1231 | } | |
1232 | ||
47086fc5 JB |
1233 | static void |
1234 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1235 | int n_frames, u8 ignored_acs, | |
1236 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1237 | { |
1238 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1239 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1240 | bool found = false; |
948d887d JB |
1241 | bool more_data = false; |
1242 | int ac; | |
4049e09a | 1243 | unsigned long driver_release_tids = 0; |
47086fc5 | 1244 | struct sk_buff_head frames; |
af818581 | 1245 | |
deeaee19 | 1246 | /* Service or PS-Poll period starts */ |
c2c98fde | 1247 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1248 | |
47086fc5 | 1249 | __skb_queue_head_init(&frames); |
948d887d JB |
1250 | |
1251 | /* | |
47086fc5 | 1252 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1253 | */ |
1254 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1255 | unsigned long tids; |
1256 | ||
47086fc5 | 1257 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1258 | continue; |
1259 | ||
4049e09a JB |
1260 | tids = ieee80211_tids_for_ac(ac); |
1261 | ||
1262 | if (!found) { | |
1263 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1264 | if (driver_release_tids) { | |
1265 | found = true; | |
1266 | } else { | |
47086fc5 JB |
1267 | struct sk_buff *skb; |
1268 | ||
1269 | while (n_frames > 0) { | |
1270 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1271 | if (!skb) { | |
1272 | skb = skb_dequeue( | |
1273 | &sta->ps_tx_buf[ac]); | |
1274 | if (skb) | |
1275 | local->total_ps_buffered--; | |
1276 | } | |
1277 | if (!skb) | |
1278 | break; | |
1279 | n_frames--; | |
4049e09a | 1280 | found = true; |
47086fc5 JB |
1281 | __skb_queue_tail(&frames, skb); |
1282 | } | |
948d887d | 1283 | } |
948d887d | 1284 | |
4049e09a JB |
1285 | /* |
1286 | * If the driver has data on more than one TID then | |
1287 | * certainly there's more data if we release just a | |
1288 | * single frame now (from a single TID). | |
1289 | */ | |
47086fc5 JB |
1290 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1291 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1292 | more_data = true; |
1293 | driver_release_tids = | |
1294 | BIT(ffs(driver_release_tids) - 1); | |
1295 | break; | |
1296 | } | |
1297 | } | |
948d887d JB |
1298 | |
1299 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1300 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1301 | more_data = true; | |
1302 | break; | |
1303 | } | |
af818581 | 1304 | } |
af818581 | 1305 | |
4049e09a | 1306 | if (!found) { |
ce662b44 | 1307 | int tid; |
af818581 JB |
1308 | |
1309 | /* | |
ce662b44 JB |
1310 | * For PS-Poll, this can only happen due to a race condition |
1311 | * when we set the TIM bit and the station notices it, but | |
1312 | * before it can poll for the frame we expire it. | |
1313 | * | |
1314 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1315 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1316 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1317 | * more than the value specified in the Max SP Length field | |
1318 | * in the QoS Capability element from delivery-enabled ACs, | |
1319 | * that are destined for the non-AP STA. | |
1320 | * | |
1321 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1322 | */ |
af818581 | 1323 | |
ce662b44 JB |
1324 | /* This will evaluate to 1, 3, 5 or 7. */ |
1325 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1326 | |
40b96408 | 1327 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1328 | return; |
1329 | } | |
af818581 | 1330 | |
47086fc5 JB |
1331 | if (!driver_release_tids) { |
1332 | struct sk_buff_head pending; | |
1333 | struct sk_buff *skb; | |
40b96408 JB |
1334 | int num = 0; |
1335 | u16 tids = 0; | |
af818581 | 1336 | |
47086fc5 | 1337 | skb_queue_head_init(&pending); |
af818581 | 1338 | |
47086fc5 JB |
1339 | while ((skb = __skb_dequeue(&frames))) { |
1340 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1341 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1342 | u8 *qoshdr = NULL; |
1343 | ||
1344 | num++; | |
af818581 | 1345 | |
47086fc5 JB |
1346 | /* |
1347 | * Tell TX path to send this frame even though the | |
1348 | * STA may still remain is PS mode after this frame | |
1349 | * exchange. | |
1350 | */ | |
1351 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE; | |
1352 | ||
1353 | /* | |
1354 | * Use MoreData flag to indicate whether there are | |
1355 | * more buffered frames for this STA | |
1356 | */ | |
24b9c373 | 1357 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1358 | hdr->frame_control |= |
1359 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1360 | else |
1361 | hdr->frame_control &= | |
1362 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1363 | |
40b96408 JB |
1364 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1365 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1366 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1367 | ||
1368 | /* set EOSP for the frame */ | |
47086fc5 | 1369 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && |
40b96408 JB |
1370 | qoshdr && skb_queue_empty(&frames)) |
1371 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
af818581 | 1372 | |
deeaee19 JB |
1373 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1374 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1375 | ||
40b96408 JB |
1376 | if (qoshdr) |
1377 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1378 | else | |
1379 | tids |= BIT(0); | |
1380 | ||
47086fc5 JB |
1381 | __skb_queue_tail(&pending, skb); |
1382 | } | |
af818581 | 1383 | |
40b96408 JB |
1384 | drv_allow_buffered_frames(local, sta, tids, num, |
1385 | reason, more_data); | |
1386 | ||
47086fc5 | 1387 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1388 | |
c868cb35 | 1389 | sta_info_recalc_tim(sta); |
af818581 JB |
1390 | } else { |
1391 | /* | |
4049e09a JB |
1392 | * We need to release a frame that is buffered somewhere in the |
1393 | * driver ... it'll have to handle that. | |
1394 | * Note that, as per the comment above, it'll also have to see | |
1395 | * if there is more than just one frame on the specific TID that | |
1396 | * we're releasing from, and it needs to set the more-data bit | |
1397 | * accordingly if we tell it that there's no more data. If we do | |
1398 | * tell it there's more data, then of course the more-data bit | |
1399 | * needs to be set anyway. | |
1400 | */ | |
1401 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1402 | n_frames, reason, more_data); |
4049e09a JB |
1403 | |
1404 | /* | |
1405 | * Note that we don't recalculate the TIM bit here as it would | |
1406 | * most likely have no effect at all unless the driver told us | |
1407 | * that the TID became empty before returning here from the | |
1408 | * release function. | |
1409 | * Either way, however, when the driver tells us that the TID | |
1410 | * became empty we'll do the TIM recalculation. | |
af818581 | 1411 | */ |
af818581 JB |
1412 | } |
1413 | } | |
1414 | ||
47086fc5 JB |
1415 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1416 | { | |
1417 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1418 | ||
1419 | /* | |
1420 | * If all ACs are delivery-enabled then we should reply | |
1421 | * from any of them, if only some are enabled we reply | |
1422 | * only from the non-enabled ones. | |
1423 | */ | |
1424 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1425 | ignore_for_response = 0; | |
1426 | ||
1427 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1428 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1429 | } | |
1430 | ||
1431 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1432 | { | |
1433 | int n_frames = sta->sta.max_sp; | |
1434 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1435 | ||
1436 | /* | |
1437 | * If we ever grow support for TSPEC this might happen if | |
1438 | * the TSPEC update from hostapd comes in between a trigger | |
1439 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1440 | * actually getting called. | |
1441 | */ | |
1442 | if (!delivery_enabled) | |
1443 | return; | |
1444 | ||
47086fc5 JB |
1445 | switch (sta->sta.max_sp) { |
1446 | case 1: | |
1447 | n_frames = 2; | |
1448 | break; | |
1449 | case 2: | |
1450 | n_frames = 4; | |
1451 | break; | |
1452 | case 3: | |
1453 | n_frames = 6; | |
1454 | break; | |
1455 | case 0: | |
1456 | /* XXX: what is a good value? */ | |
1457 | n_frames = 8; | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1462 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1463 | } | |
1464 | ||
af818581 JB |
1465 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1466 | struct ieee80211_sta *pubsta, bool block) | |
1467 | { | |
1468 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1469 | ||
b5878a2d JB |
1470 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1471 | ||
af818581 | 1472 | if (block) |
c2c98fde JB |
1473 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1474 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1475 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1476 | } | |
1477 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1478 | |
37fbd908 JB |
1479 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1480 | { | |
1481 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1482 | struct ieee80211_local *local = sta->local; | |
1483 | struct sk_buff *skb; | |
1484 | struct skb_eosp_msg_data *data; | |
1485 | ||
1486 | trace_api_eosp(local, pubsta); | |
1487 | ||
1488 | skb = alloc_skb(0, GFP_ATOMIC); | |
1489 | if (!skb) { | |
1490 | /* too bad ... but race is better than loss */ | |
1491 | clear_sta_flag(sta, WLAN_STA_SP); | |
1492 | return; | |
1493 | } | |
1494 | ||
1495 | data = (void *)skb->cb; | |
1496 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1497 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1498 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1499 | skb_queue_tail(&local->skb_queue, skb); | |
1500 | tasklet_schedule(&local->tasklet); | |
1501 | } | |
1502 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1503 | ||
042ec453 JB |
1504 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1505 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1506 | { |
1507 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1508 | ||
948d887d | 1509 | if (WARN_ON(tid >= STA_TID_NUM)) |
042ec453 JB |
1510 | return; |
1511 | ||
948d887d JB |
1512 | if (buffered) |
1513 | set_bit(tid, &sta->driver_buffered_tids); | |
1514 | else | |
1515 | clear_bit(tid, &sta->driver_buffered_tids); | |
1516 | ||
c868cb35 | 1517 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1518 | } |
042ec453 | 1519 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |