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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 */ | |
2a33bee2 GE |
354 | err = drv_sta_add(local, sdata, &sta->sta); |
355 | if (err) { | |
356 | if (!async) | |
357 | return err; | |
358 | printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to " | |
359 | "driver (%d) - keeping it anyway.\n", | |
360 | sdata->name, sta->sta.addr, err); | |
361 | } else { | |
362 | sta->uploaded = true; | |
34e89507 | 363 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
364 | if (async) |
365 | wiphy_debug(local->hw.wiphy, | |
366 | "Finished adding IBSS STA %pM\n", | |
367 | sta->sta.addr); | |
34e89507 | 368 | #endif |
2a33bee2 GE |
369 | } |
370 | ||
371 | sdata = sta->sdata; | |
34e89507 JB |
372 | } |
373 | ||
2a33bee2 GE |
374 | if (!dummy_reinsert) { |
375 | if (!async) { | |
376 | local->num_sta++; | |
377 | local->sta_generation++; | |
378 | smp_mb(); | |
34e89507 | 379 | |
2a33bee2 GE |
380 | /* make the station visible */ |
381 | spin_lock_irqsave(&local->sta_lock, flags); | |
382 | sta_info_hash_add(local, sta); | |
383 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
384 | } | |
34e89507 | 385 | |
2a33bee2 GE |
386 | list_add(&sta->list, &local->sta_list); |
387 | } else { | |
388 | sta->dummy = false; | |
34e89507 JB |
389 | } |
390 | ||
2a33bee2 GE |
391 | if (!sta->dummy) { |
392 | ieee80211_sta_debugfs_add(sta); | |
393 | rate_control_add_sta_debugfs(sta); | |
34e89507 | 394 | |
2a33bee2 GE |
395 | memset(&sinfo, 0, sizeof(sinfo)); |
396 | sinfo.filled = 0; | |
397 | sinfo.generation = local->sta_generation; | |
398 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
399 | } | |
34e89507 JB |
400 | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static void sta_info_finish_pending(struct ieee80211_local *local) | |
405 | { | |
406 | struct sta_info *sta; | |
407 | unsigned long flags; | |
408 | ||
409 | spin_lock_irqsave(&local->sta_lock, flags); | |
410 | while (!list_empty(&local->sta_pending_list)) { | |
411 | sta = list_first_entry(&local->sta_pending_list, | |
412 | struct sta_info, list); | |
413 | list_del(&sta->list); | |
414 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
415 | ||
2a33bee2 | 416 | sta_info_finish_insert(sta, true, false); |
34e89507 JB |
417 | |
418 | spin_lock_irqsave(&local->sta_lock, flags); | |
419 | } | |
420 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
421 | } | |
422 | ||
423 | static void sta_info_finish_work(struct work_struct *work) | |
424 | { | |
425 | struct ieee80211_local *local = | |
426 | container_of(work, struct ieee80211_local, sta_finish_work); | |
427 | ||
428 | mutex_lock(&local->sta_mtx); | |
429 | sta_info_finish_pending(local); | |
430 | mutex_unlock(&local->sta_mtx); | |
431 | } | |
432 | ||
8c71df7a | 433 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 434 | { |
34e89507 | 435 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 436 | |
03e4497e JB |
437 | /* |
438 | * Can't be a WARN_ON because it can be triggered through a race: | |
439 | * something inserts a STA (on one CPU) without holding the RTNL | |
440 | * and another CPU turns off the net device. | |
441 | */ | |
8c71df7a GE |
442 | if (unlikely(!ieee80211_sdata_running(sdata))) |
443 | return -ENETDOWN; | |
03e4497e | 444 | |
47846c9b | 445 | if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->vif.addr) == 0 || |
8c71df7a GE |
446 | is_multicast_ether_addr(sta->sta.addr))) |
447 | return -EINVAL; | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | static int sta_info_insert_ibss(struct sta_info *sta) __acquires(RCU) | |
453 | { | |
454 | struct ieee80211_local *local = sta->local; | |
455 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
456 | unsigned long flags; | |
457 | ||
458 | spin_lock_irqsave(&local->sta_lock, flags); | |
459 | /* check if STA exists already */ | |
2a33bee2 | 460 | if (sta_info_get_bss_rx(sdata, sta->sta.addr)) { |
8c71df7a | 461 | spin_unlock_irqrestore(&local->sta_lock, flags); |
34e89507 | 462 | rcu_read_lock(); |
8c71df7a | 463 | return -EEXIST; |
93e5deb1 | 464 | } |
44213b5e | 465 | |
8c71df7a GE |
466 | local->num_sta++; |
467 | local->sta_generation++; | |
468 | smp_mb(); | |
469 | sta_info_hash_add(local, sta); | |
34e89507 | 470 | |
8c71df7a | 471 | list_add_tail(&sta->list, &local->sta_pending_list); |
34e89507 | 472 | |
8c71df7a GE |
473 | rcu_read_lock(); |
474 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
34e89507 JB |
475 | |
476 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
8c71df7a GE |
477 | wiphy_debug(local->hw.wiphy, "Added IBSS STA %pM\n", |
478 | sta->sta.addr); | |
34e89507 JB |
479 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
480 | ||
8c71df7a | 481 | ieee80211_queue_work(&local->hw, &local->sta_finish_work); |
34e89507 | 482 | |
8c71df7a GE |
483 | return 0; |
484 | } | |
485 | ||
486 | /* | |
487 | * should be called with sta_mtx locked | |
488 | * this function replaces the mutex lock | |
489 | * with a RCU lock | |
490 | */ | |
491 | static int sta_info_insert_non_ibss(struct sta_info *sta) __acquires(RCU) | |
492 | { | |
493 | struct ieee80211_local *local = sta->local; | |
494 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
495 | unsigned long flags; | |
2a33bee2 GE |
496 | struct sta_info *exist_sta; |
497 | bool dummy_reinsert = false; | |
8c71df7a GE |
498 | int err = 0; |
499 | ||
500 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 JB |
501 | |
502 | /* | |
503 | * On first glance, this will look racy, because the code | |
8c71df7a | 504 | * in this function, which inserts a station with sleeping, |
34e89507 JB |
505 | * unlocks the sta_lock between checking existence in the |
506 | * hash table and inserting into it. | |
507 | * | |
508 | * However, it is not racy against itself because it keeps | |
8c71df7a | 509 | * the mutex locked. |
34e89507 JB |
510 | */ |
511 | ||
d0709a65 | 512 | spin_lock_irqsave(&local->sta_lock, flags); |
2a33bee2 GE |
513 | /* |
514 | * check if STA exists already. | |
515 | * only accept a scenario of a second call to sta_info_insert_non_ibss | |
516 | * with a dummy station entry that was inserted earlier | |
517 | * in that case - assume that the dummy station flag should | |
518 | * be removed. | |
519 | */ | |
520 | exist_sta = sta_info_get_bss_rx(sdata, sta->sta.addr); | |
521 | if (exist_sta) { | |
522 | if (exist_sta == sta && sta->dummy) { | |
523 | dummy_reinsert = true; | |
524 | } else { | |
525 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
526 | mutex_unlock(&local->sta_mtx); | |
527 | rcu_read_lock(); | |
528 | return -EEXIST; | |
529 | } | |
43ba7e95 | 530 | } |
32bfd35d | 531 | |
34e89507 | 532 | spin_unlock_irqrestore(&local->sta_lock, flags); |
32bfd35d | 533 | |
2a33bee2 | 534 | err = sta_info_finish_insert(sta, false, dummy_reinsert); |
34e89507 JB |
535 | if (err) { |
536 | mutex_unlock(&local->sta_mtx); | |
537 | rcu_read_lock(); | |
8c71df7a | 538 | return err; |
32bfd35d | 539 | } |
d0709a65 | 540 | |
f0706e82 | 541 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
2a33bee2 GE |
542 | wiphy_debug(local->hw.wiphy, "Inserted %sSTA %pM\n", |
543 | sta->dummy ? "dummy " : "", sta->sta.addr); | |
f0706e82 JB |
544 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
545 | ||
34e89507 JB |
546 | /* move reference to rcu-protected */ |
547 | rcu_read_lock(); | |
548 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 549 | |
73651ee6 JB |
550 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
551 | mesh_accept_plinks_update(sdata); | |
552 | ||
8c71df7a GE |
553 | return 0; |
554 | } | |
555 | ||
556 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
557 | { | |
558 | struct ieee80211_local *local = sta->local; | |
559 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
560 | int err = 0; | |
561 | ||
562 | err = sta_info_insert_check(sta); | |
563 | if (err) { | |
564 | rcu_read_lock(); | |
565 | goto out_free; | |
566 | } | |
567 | ||
568 | /* | |
569 | * In ad-hoc mode, we sometimes need to insert stations | |
570 | * from tasklet context from the RX path. To avoid races, | |
571 | * always do so in that case -- see the comment below. | |
572 | */ | |
573 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
574 | err = sta_info_insert_ibss(sta); | |
575 | if (err) | |
576 | goto out_free; | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | /* | |
582 | * It might seem that the function called below is in race against | |
583 | * the function call above that atomically inserts the station... That, | |
584 | * however, is not true because the above code can only | |
585 | * be invoked for IBSS interfaces, and the below code will | |
586 | * not be -- and the two do not race against each other as | |
587 | * the hash table also keys off the interface. | |
588 | */ | |
589 | ||
590 | might_sleep(); | |
591 | ||
592 | mutex_lock(&local->sta_mtx); | |
593 | ||
594 | err = sta_info_insert_non_ibss(sta); | |
595 | if (err) | |
596 | goto out_free; | |
597 | ||
73651ee6 | 598 | return 0; |
93e5deb1 JB |
599 | out_free: |
600 | BUG_ON(!err); | |
601 | __sta_info_free(local, sta); | |
602 | return err; | |
f0706e82 JB |
603 | } |
604 | ||
34e89507 JB |
605 | int sta_info_insert(struct sta_info *sta) |
606 | { | |
607 | int err = sta_info_insert_rcu(sta); | |
608 | ||
609 | rcu_read_unlock(); | |
610 | ||
611 | return err; | |
612 | } | |
613 | ||
2a33bee2 GE |
614 | /* Caller must hold sta->local->sta_mtx */ |
615 | int sta_info_reinsert(struct sta_info *sta) | |
616 | { | |
617 | struct ieee80211_local *local = sta->local; | |
618 | int err = 0; | |
619 | ||
620 | err = sta_info_insert_check(sta); | |
621 | if (err) { | |
622 | mutex_unlock(&local->sta_mtx); | |
623 | return err; | |
624 | } | |
625 | ||
626 | might_sleep(); | |
627 | ||
628 | err = sta_info_insert_non_ibss(sta); | |
629 | rcu_read_unlock(); | |
630 | return err; | |
631 | } | |
632 | ||
004c872e JB |
633 | static inline void __bss_tim_set(struct ieee80211_if_ap *bss, u16 aid) |
634 | { | |
635 | /* | |
636 | * This format has been mandated by the IEEE specifications, | |
637 | * so this line may not be changed to use the __set_bit() format. | |
638 | */ | |
639 | bss->tim[aid / 8] |= (1 << (aid % 8)); | |
640 | } | |
641 | ||
642 | static inline void __bss_tim_clear(struct ieee80211_if_ap *bss, u16 aid) | |
643 | { | |
644 | /* | |
645 | * This format has been mandated by the IEEE specifications, | |
646 | * so this line may not be changed to use the __clear_bit() format. | |
647 | */ | |
648 | bss->tim[aid / 8] &= ~(1 << (aid % 8)); | |
649 | } | |
650 | ||
948d887d | 651 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 652 | { |
948d887d JB |
653 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
654 | switch (ac) { | |
655 | case IEEE80211_AC_VO: | |
656 | return BIT(6) | BIT(7); | |
657 | case IEEE80211_AC_VI: | |
658 | return BIT(4) | BIT(5); | |
659 | case IEEE80211_AC_BE: | |
660 | return BIT(0) | BIT(3); | |
661 | case IEEE80211_AC_BK: | |
662 | return BIT(1) | BIT(2); | |
663 | default: | |
664 | WARN_ON(1); | |
665 | return 0; | |
d0709a65 | 666 | } |
004c872e JB |
667 | } |
668 | ||
c868cb35 | 669 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 670 | { |
c868cb35 JB |
671 | struct ieee80211_local *local = sta->local; |
672 | struct ieee80211_if_ap *bss = sta->sdata->bss; | |
d0709a65 | 673 | unsigned long flags; |
948d887d JB |
674 | bool indicate_tim = false; |
675 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
676 | int ac; | |
004c872e | 677 | |
c868cb35 JB |
678 | if (WARN_ON_ONCE(!sta->sdata->bss)) |
679 | return; | |
3e122be0 | 680 | |
c868cb35 JB |
681 | /* No need to do anything if the driver does all */ |
682 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
683 | return; | |
004c872e | 684 | |
c868cb35 JB |
685 | if (sta->dead) |
686 | goto done; | |
3e122be0 | 687 | |
948d887d JB |
688 | /* |
689 | * If all ACs are delivery-enabled then we should build | |
690 | * the TIM bit for all ACs anyway; if only some are then | |
691 | * we ignore those and build the TIM bit using only the | |
692 | * non-enabled ones. | |
693 | */ | |
694 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
695 | ignore_for_tim = 0; | |
696 | ||
697 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
698 | unsigned long tids; | |
3e122be0 | 699 | |
948d887d JB |
700 | if (ignore_for_tim & BIT(ac)) |
701 | continue; | |
702 | ||
703 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
704 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
705 | if (indicate_tim) | |
706 | break; | |
3e122be0 | 707 | |
948d887d JB |
708 | tids = ieee80211_tids_for_ac(ac); |
709 | ||
710 | indicate_tim |= | |
711 | sta->driver_buffered_tids & tids; | |
d0709a65 | 712 | } |
004c872e | 713 | |
c868cb35 JB |
714 | done: |
715 | spin_lock_irqsave(&local->sta_lock, flags); | |
004c872e | 716 | |
948d887d | 717 | if (indicate_tim) |
c868cb35 JB |
718 | __bss_tim_set(bss, sta->sta.aid); |
719 | else | |
720 | __bss_tim_clear(bss, sta->sta.aid); | |
004c872e | 721 | |
c868cb35 JB |
722 | if (local->ops->set_tim) { |
723 | local->tim_in_locked_section = true; | |
948d887d | 724 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
725 | local->tim_in_locked_section = false; |
726 | } | |
3e122be0 | 727 | |
c868cb35 | 728 | spin_unlock_irqrestore(&local->sta_lock, flags); |
004c872e JB |
729 | } |
730 | ||
cd0b8d89 | 731 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 732 | { |
e039fa4a | 733 | struct ieee80211_tx_info *info; |
f0706e82 JB |
734 | int timeout; |
735 | ||
736 | if (!skb) | |
cd0b8d89 | 737 | return false; |
f0706e82 | 738 | |
e039fa4a | 739 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
740 | |
741 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
742 | timeout = (sta->listen_interval * |
743 | sta->sdata->vif.bss_conf.beacon_int * | |
744 | 32 / 15625) * HZ; | |
f0706e82 JB |
745 | if (timeout < STA_TX_BUFFER_EXPIRE) |
746 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 747 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
748 | } |
749 | ||
750 | ||
948d887d JB |
751 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
752 | struct sta_info *sta, int ac) | |
f0706e82 JB |
753 | { |
754 | unsigned long flags; | |
755 | struct sk_buff *skb; | |
756 | ||
60750397 JB |
757 | /* |
758 | * First check for frames that should expire on the filtered | |
759 | * queue. Frames here were rejected by the driver and are on | |
760 | * a separate queue to avoid reordering with normal PS-buffered | |
761 | * frames. They also aren't accounted for right now in the | |
762 | * total_ps_buffered counter. | |
763 | */ | |
764 | for (;;) { | |
948d887d JB |
765 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
766 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 767 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 768 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
769 | else |
770 | skb = NULL; | |
948d887d | 771 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
772 | |
773 | /* | |
774 | * Frames are queued in order, so if this one | |
775 | * hasn't expired yet we can stop testing. If | |
776 | * we actually reached the end of the queue we | |
777 | * also need to stop, of course. | |
778 | */ | |
779 | if (!skb) | |
780 | break; | |
781 | dev_kfree_skb(skb); | |
782 | } | |
783 | ||
784 | /* | |
785 | * Now also check the normal PS-buffered queue, this will | |
786 | * only find something if the filtered queue was emptied | |
787 | * since the filtered frames are all before the normal PS | |
788 | * buffered frames. | |
789 | */ | |
f0706e82 | 790 | for (;;) { |
948d887d JB |
791 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
792 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 793 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 794 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 795 | else |
f0706e82 | 796 | skb = NULL; |
948d887d | 797 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 798 | |
60750397 JB |
799 | /* |
800 | * frames are queued in order, so if this one | |
801 | * hasn't expired yet (or we reached the end of | |
802 | * the queue) we can stop testing | |
803 | */ | |
836341a7 | 804 | if (!skb) |
f0706e82 | 805 | break; |
836341a7 | 806 | |
836341a7 | 807 | local->total_ps_buffered--; |
f4ea83dd | 808 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 JB |
809 | printk(KERN_DEBUG "Buffered frame expired (STA %pM)\n", |
810 | sta->sta.addr); | |
f4ea83dd | 811 | #endif |
836341a7 | 812 | dev_kfree_skb(skb); |
f0706e82 | 813 | } |
3393a608 | 814 | |
60750397 JB |
815 | /* |
816 | * Finally, recalculate the TIM bit for this station -- it might | |
817 | * now be clear because the station was too slow to retrieve its | |
818 | * frames. | |
819 | */ | |
820 | sta_info_recalc_tim(sta); | |
821 | ||
822 | /* | |
823 | * Return whether there are any frames still buffered, this is | |
824 | * used to check whether the cleanup timer still needs to run, | |
825 | * if there are no frames we don't need to rearm the timer. | |
826 | */ | |
948d887d JB |
827 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
828 | skb_queue_empty(&sta->tx_filtered[ac])); | |
829 | } | |
830 | ||
831 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
832 | struct sta_info *sta) | |
833 | { | |
834 | bool have_buffered = false; | |
835 | int ac; | |
836 | ||
837 | /* This is only necessary for stations on BSS interfaces */ | |
838 | if (!sta->sdata->bss) | |
839 | return false; | |
840 | ||
841 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
842 | have_buffered |= | |
843 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
844 | ||
845 | return have_buffered; | |
f0706e82 JB |
846 | } |
847 | ||
34e89507 | 848 | static int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 849 | { |
34e89507 JB |
850 | struct ieee80211_local *local; |
851 | struct ieee80211_sub_if_data *sdata; | |
34e89507 | 852 | unsigned long flags; |
948d887d | 853 | int ret, i, ac; |
42624d49 | 854 | struct tid_ampdu_tx *tid_tx; |
f0706e82 | 855 | |
34e89507 | 856 | might_sleep(); |
f0706e82 | 857 | |
34e89507 JB |
858 | if (!sta) |
859 | return -ENOENT; | |
5bb644a0 | 860 | |
34e89507 JB |
861 | local = sta->local; |
862 | sdata = sta->sdata; | |
f0706e82 | 863 | |
098a6070 JB |
864 | /* |
865 | * Before removing the station from the driver and | |
866 | * rate control, it might still start new aggregation | |
867 | * sessions -- block that to make sure the tear-down | |
868 | * will be sufficient. | |
869 | */ | |
c2c98fde | 870 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
53f73c09 | 871 | ieee80211_sta_tear_down_BA_sessions(sta, true); |
098a6070 | 872 | |
34e89507 JB |
873 | spin_lock_irqsave(&local->sta_lock, flags); |
874 | ret = sta_info_hash_del(local, sta); | |
875 | /* this might still be the pending list ... which is fine */ | |
876 | if (!ret) | |
877 | list_del(&sta->list); | |
878 | spin_unlock_irqrestore(&local->sta_lock, flags); | |
879 | if (ret) | |
880 | return ret; | |
881 | ||
8cb23153 | 882 | mutex_lock(&local->key_mtx); |
e31b8213 | 883 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 884 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 885 | if (sta->ptk) |
40b275b6 | 886 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 887 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
888 | |
889 | sta->dead = true; | |
890 | ||
c2c98fde JB |
891 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
892 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { | |
34e89507 JB |
893 | BUG_ON(!sdata->bss); |
894 | ||
c2c98fde JB |
895 | clear_sta_flag(sta, WLAN_STA_PS_STA); |
896 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
897 | ||
34e89507 | 898 | atomic_dec(&sdata->bss->num_sta_ps); |
c868cb35 | 899 | sta_info_recalc_tim(sta); |
34e89507 JB |
900 | } |
901 | ||
902 | local->num_sta--; | |
903 | local->sta_generation++; | |
904 | ||
905 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 906 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 JB |
907 | |
908 | if (sta->uploaded) { | |
909 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
910 | sdata = container_of(sdata->bss, | |
911 | struct ieee80211_sub_if_data, | |
912 | u.ap); | |
913 | drv_sta_remove(local, sdata, &sta->sta); | |
914 | sdata = sta->sdata; | |
915 | } | |
916 | ||
e64b3795 JB |
917 | /* |
918 | * At this point, after we wait for an RCU grace period, | |
919 | * neither mac80211 nor the driver can reference this | |
920 | * sta struct any more except by still existing timers | |
921 | * associated with this station that we clean up below. | |
922 | */ | |
923 | synchronize_rcu(); | |
924 | ||
948d887d JB |
925 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
926 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
927 | __skb_queue_purge(&sta->ps_tx_buf[ac]); | |
928 | __skb_queue_purge(&sta->tx_filtered[ac]); | |
929 | } | |
c868cb35 | 930 | |
34e89507 | 931 | #ifdef CONFIG_MAC80211_MESH |
e64b3795 | 932 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
34e89507 | 933 | mesh_accept_plinks_update(sdata); |
34e89507 JB |
934 | #endif |
935 | ||
936 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec | 937 | wiphy_debug(local->hw.wiphy, "Removed STA %pM\n", sta->sta.addr); |
34e89507 JB |
938 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
939 | cancel_work_sync(&sta->drv_unblock_wk); | |
940 | ||
ec15e68b JM |
941 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
942 | ||
34e89507 JB |
943 | rate_control_remove_sta_debugfs(sta); |
944 | ieee80211_sta_debugfs_remove(sta); | |
945 | ||
946 | #ifdef CONFIG_MAC80211_MESH | |
947 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
948 | mesh_plink_deactivate(sta); | |
949 | del_timer_sync(&sta->plink_timer); | |
950 | } | |
951 | #endif | |
952 | ||
42624d49 YAP |
953 | /* There could be some memory leaks because of ampdu tx pending queue |
954 | * not being freed before destroying the station info. | |
955 | * | |
956 | * Make sure that such queues are purged before freeing the station | |
957 | * info. | |
958 | * TODO: We have to somehow postpone the full destruction | |
959 | * until the aggregation stop completes. Refer | |
960 | * http://thread.gmane.org/gmane.linux.kernel.wireless.general/81936 | |
961 | */ | |
962 | for (i = 0; i < STA_TID_NUM; i++) { | |
963 | if (!sta->ampdu_mlme.tid_tx[i]) | |
964 | continue; | |
965 | tid_tx = sta->ampdu_mlme.tid_tx[i]; | |
966 | if (skb_queue_len(&tid_tx->pending)) { | |
967 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
968 | wiphy_debug(local->hw.wiphy, "TX A-MPDU purging %d " | |
969 | "packets for tid=%d\n", | |
970 | skb_queue_len(&tid_tx->pending), i); | |
971 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
972 | __skb_queue_purge(&tid_tx->pending); | |
973 | } | |
974 | kfree_rcu(tid_tx, rcu_head); | |
975 | } | |
976 | ||
34e89507 JB |
977 | __sta_info_free(local, sta); |
978 | ||
979 | return 0; | |
4d6141c3 JS |
980 | } |
981 | ||
34e89507 | 982 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 983 | { |
34e89507 JB |
984 | struct sta_info *sta; |
985 | int ret; | |
4d6141c3 | 986 | |
34e89507 | 987 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 988 | sta = sta_info_get_rx(sdata, addr); |
34e89507 JB |
989 | ret = __sta_info_destroy(sta); |
990 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
991 | |
992 | return ret; | |
993 | } | |
994 | ||
34e89507 JB |
995 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
996 | const u8 *addr) | |
e9f207f0 | 997 | { |
34e89507 JB |
998 | struct sta_info *sta; |
999 | int ret; | |
e9f207f0 | 1000 | |
34e89507 | 1001 | mutex_lock(&sdata->local->sta_mtx); |
2a33bee2 | 1002 | sta = sta_info_get_bss_rx(sdata, addr); |
34e89507 JB |
1003 | ret = __sta_info_destroy(sta); |
1004 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 1005 | |
34e89507 JB |
1006 | return ret; |
1007 | } | |
e9f207f0 | 1008 | |
34e89507 JB |
1009 | static void sta_info_cleanup(unsigned long data) |
1010 | { | |
1011 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1012 | struct sta_info *sta; | |
3393a608 | 1013 | bool timer_needed = false; |
34e89507 JB |
1014 | |
1015 | rcu_read_lock(); | |
1016 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
1017 | if (sta_info_cleanup_expire_buffered(local, sta)) |
1018 | timer_needed = true; | |
34e89507 | 1019 | rcu_read_unlock(); |
e9f207f0 | 1020 | |
34e89507 JB |
1021 | if (local->quiescing) |
1022 | return; | |
d0709a65 | 1023 | |
3393a608 JO |
1024 | if (!timer_needed) |
1025 | return; | |
1026 | ||
26d59535 JB |
1027 | mod_timer(&local->sta_cleanup, |
1028 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 1029 | } |
e9f207f0 | 1030 | |
f0706e82 JB |
1031 | void sta_info_init(struct ieee80211_local *local) |
1032 | { | |
d0709a65 | 1033 | spin_lock_init(&local->sta_lock); |
34e89507 | 1034 | mutex_init(&local->sta_mtx); |
f0706e82 | 1035 | INIT_LIST_HEAD(&local->sta_list); |
34e89507 JB |
1036 | INIT_LIST_HEAD(&local->sta_pending_list); |
1037 | INIT_WORK(&local->sta_finish_work, sta_info_finish_work); | |
f0706e82 | 1038 | |
b24b8a24 PE |
1039 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
1040 | (unsigned long)local); | |
f0706e82 JB |
1041 | } |
1042 | ||
1043 | void sta_info_stop(struct ieee80211_local *local) | |
1044 | { | |
f0706e82 | 1045 | del_timer(&local->sta_cleanup); |
be8755e1 | 1046 | sta_info_flush(local, NULL); |
f0706e82 JB |
1047 | } |
1048 | ||
f0706e82 JB |
1049 | /** |
1050 | * sta_info_flush - flush matching STA entries from the STA table | |
44213b5e JB |
1051 | * |
1052 | * Returns the number of removed STA entries. | |
1053 | * | |
f0706e82 | 1054 | * @local: local interface data |
d0709a65 | 1055 | * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs |
f0706e82 | 1056 | */ |
44213b5e | 1057 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 1058 | struct ieee80211_sub_if_data *sdata) |
f0706e82 JB |
1059 | { |
1060 | struct sta_info *sta, *tmp; | |
44213b5e | 1061 | int ret = 0; |
f0706e82 | 1062 | |
d0709a65 | 1063 | might_sleep(); |
be8755e1 | 1064 | |
34e89507 JB |
1065 | mutex_lock(&local->sta_mtx); |
1066 | ||
1067 | sta_info_finish_pending(local); | |
1068 | ||
d0709a65 | 1069 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
34e89507 JB |
1070 | if (!sdata || sdata == sta->sdata) |
1071 | WARN_ON(__sta_info_destroy(sta)); | |
be8755e1 | 1072 | } |
34e89507 | 1073 | mutex_unlock(&local->sta_mtx); |
44213b5e JB |
1074 | |
1075 | return ret; | |
f0706e82 | 1076 | } |
dc6676b7 | 1077 | |
24723d1b JB |
1078 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1079 | unsigned long exp_time) | |
1080 | { | |
1081 | struct ieee80211_local *local = sdata->local; | |
1082 | struct sta_info *sta, *tmp; | |
24723d1b | 1083 | |
34e89507 | 1084 | mutex_lock(&local->sta_mtx); |
24723d1b JB |
1085 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
1086 | if (time_after(jiffies, sta->last_rx + exp_time)) { | |
1087 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0c68ae26 | 1088 | printk(KERN_DEBUG "%s: expiring inactive STA %pM\n", |
47846c9b | 1089 | sdata->name, sta->sta.addr); |
24723d1b | 1090 | #endif |
34e89507 | 1091 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1092 | } |
34e89507 | 1093 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1094 | } |
17741cdc | 1095 | |
686b9cb9 BG |
1096 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1097 | const u8 *addr, | |
1098 | const u8 *localaddr) | |
17741cdc | 1099 | { |
abe60632 | 1100 | struct sta_info *sta, *nxt; |
17741cdc | 1101 | |
686b9cb9 BG |
1102 | /* |
1103 | * Just return a random station if localaddr is NULL | |
1104 | * ... first in list. | |
1105 | */ | |
f7c65594 | 1106 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 BG |
1107 | if (localaddr && |
1108 | compare_ether_addr(sta->sdata->vif.addr, localaddr) != 0) | |
1109 | continue; | |
f7c65594 JB |
1110 | if (!sta->uploaded) |
1111 | return NULL; | |
abe60632 | 1112 | return &sta->sta; |
f7c65594 JB |
1113 | } |
1114 | ||
abe60632 | 1115 | return NULL; |
17741cdc | 1116 | } |
686b9cb9 | 1117 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1118 | |
1119 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1120 | const u8 *addr) | |
1121 | { | |
f7c65594 | 1122 | struct sta_info *sta; |
5ed176e1 JB |
1123 | |
1124 | if (!vif) | |
1125 | return NULL; | |
1126 | ||
f7c65594 JB |
1127 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1128 | if (!sta) | |
1129 | return NULL; | |
1130 | ||
1131 | if (!sta->uploaded) | |
1132 | return NULL; | |
5ed176e1 | 1133 | |
f7c65594 | 1134 | return &sta->sta; |
5ed176e1 | 1135 | } |
17741cdc | 1136 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1137 | |
50a9432d JB |
1138 | static void clear_sta_ps_flags(void *_sta) |
1139 | { | |
1140 | struct sta_info *sta = _sta; | |
1141 | ||
c2c98fde JB |
1142 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1143 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
50a9432d JB |
1144 | } |
1145 | ||
af818581 JB |
1146 | /* powersave support code */ |
1147 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1148 | { | |
1149 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1150 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1151 | struct sk_buff_head pending; |
1152 | int filtered = 0, buffered = 0, ac; | |
1153 | ||
c2c98fde | 1154 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1155 | |
948d887d JB |
1156 | BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1); |
1157 | sta->driver_buffered_tids = 0; | |
af818581 | 1158 | |
d057e5a3 AN |
1159 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1160 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1161 | |
948d887d | 1162 | skb_queue_head_init(&pending); |
af818581 JB |
1163 | |
1164 | /* Send all buffered frames to the station */ | |
948d887d JB |
1165 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1166 | int count = skb_queue_len(&pending), tmp; | |
1167 | ||
1168 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); | |
1169 | tmp = skb_queue_len(&pending); | |
1170 | filtered += tmp - count; | |
1171 | count = tmp; | |
1172 | ||
1173 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); | |
1174 | tmp = skb_queue_len(&pending); | |
1175 | buffered += tmp - count; | |
1176 | } | |
1177 | ||
1178 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1179 | ||
af818581 JB |
1180 | local->total_ps_buffered -= buffered; |
1181 | ||
c868cb35 JB |
1182 | sta_info_recalc_tim(sta); |
1183 | ||
af818581 JB |
1184 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
1185 | printk(KERN_DEBUG "%s: STA %pM aid %d sending %d filtered/%d PS frames " | |
47846c9b | 1186 | "since STA not sleeping anymore\n", sdata->name, |
948d887d | 1187 | sta->sta.addr, sta->sta.aid, filtered, buffered); |
af818581 JB |
1188 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
1189 | } | |
1190 | ||
ce662b44 JB |
1191 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1192 | struct sta_info *sta, int tid, | |
40b96408 | 1193 | enum ieee80211_frame_release_type reason) |
af818581 | 1194 | { |
af818581 | 1195 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1196 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1197 | struct sk_buff *skb; |
ce662b44 JB |
1198 | int size = sizeof(*nullfunc); |
1199 | __le16 fc; | |
c2c98fde | 1200 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1201 | struct ieee80211_tx_info *info; |
af818581 | 1202 | |
ce662b44 JB |
1203 | if (qos) { |
1204 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1205 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1206 | IEEE80211_FCTL_FROMDS); | |
1207 | } else { | |
1208 | size -= 2; | |
1209 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1210 | IEEE80211_STYPE_NULLFUNC | | |
1211 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1212 | } |
af818581 | 1213 | |
ce662b44 JB |
1214 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1215 | if (!skb) | |
1216 | return; | |
1217 | ||
1218 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1219 | ||
1220 | nullfunc = (void *) skb_put(skb, size); | |
1221 | nullfunc->frame_control = fc; | |
1222 | nullfunc->duration_id = 0; | |
1223 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1224 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1225 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1226 | ||
59b66255 JB |
1227 | skb->priority = tid; |
1228 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1229 | if (qos) { |
ce662b44 JB |
1230 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1231 | ||
40b96408 | 1232 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1233 | nullfunc->qos_ctrl |= |
1234 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1235 | } | |
1236 | ||
1237 | info = IEEE80211_SKB_CB(skb); | |
1238 | ||
1239 | /* | |
1240 | * Tell TX path to send this frame even though the | |
1241 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1242 | * exchange. Also set EOSP to indicate this packet |
1243 | * ends the poll/service period. | |
ce662b44 | 1244 | */ |
deeaee19 JB |
1245 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE | |
1246 | IEEE80211_TX_STATUS_EOSP | | |
1247 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1248 | |
40b96408 JB |
1249 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1250 | ||
ce662b44 JB |
1251 | ieee80211_xmit(sdata, skb); |
1252 | } | |
1253 | ||
47086fc5 JB |
1254 | static void |
1255 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1256 | int n_frames, u8 ignored_acs, | |
1257 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1258 | { |
1259 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1260 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1261 | bool found = false; |
948d887d JB |
1262 | bool more_data = false; |
1263 | int ac; | |
4049e09a | 1264 | unsigned long driver_release_tids = 0; |
47086fc5 | 1265 | struct sk_buff_head frames; |
af818581 | 1266 | |
deeaee19 | 1267 | /* Service or PS-Poll period starts */ |
c2c98fde | 1268 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1269 | |
47086fc5 | 1270 | __skb_queue_head_init(&frames); |
948d887d JB |
1271 | |
1272 | /* | |
47086fc5 | 1273 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1274 | */ |
1275 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1276 | unsigned long tids; |
1277 | ||
47086fc5 | 1278 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1279 | continue; |
1280 | ||
4049e09a JB |
1281 | tids = ieee80211_tids_for_ac(ac); |
1282 | ||
1283 | if (!found) { | |
1284 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1285 | if (driver_release_tids) { | |
1286 | found = true; | |
1287 | } else { | |
47086fc5 JB |
1288 | struct sk_buff *skb; |
1289 | ||
1290 | while (n_frames > 0) { | |
1291 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1292 | if (!skb) { | |
1293 | skb = skb_dequeue( | |
1294 | &sta->ps_tx_buf[ac]); | |
1295 | if (skb) | |
1296 | local->total_ps_buffered--; | |
1297 | } | |
1298 | if (!skb) | |
1299 | break; | |
1300 | n_frames--; | |
4049e09a | 1301 | found = true; |
47086fc5 JB |
1302 | __skb_queue_tail(&frames, skb); |
1303 | } | |
948d887d | 1304 | } |
948d887d | 1305 | |
4049e09a JB |
1306 | /* |
1307 | * If the driver has data on more than one TID then | |
1308 | * certainly there's more data if we release just a | |
1309 | * single frame now (from a single TID). | |
1310 | */ | |
47086fc5 JB |
1311 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1312 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1313 | more_data = true; |
1314 | driver_release_tids = | |
1315 | BIT(ffs(driver_release_tids) - 1); | |
1316 | break; | |
1317 | } | |
1318 | } | |
948d887d JB |
1319 | |
1320 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1321 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1322 | more_data = true; | |
1323 | break; | |
1324 | } | |
af818581 | 1325 | } |
af818581 | 1326 | |
4049e09a | 1327 | if (!found) { |
ce662b44 | 1328 | int tid; |
af818581 JB |
1329 | |
1330 | /* | |
ce662b44 JB |
1331 | * For PS-Poll, this can only happen due to a race condition |
1332 | * when we set the TIM bit and the station notices it, but | |
1333 | * before it can poll for the frame we expire it. | |
1334 | * | |
1335 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1336 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1337 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1338 | * more than the value specified in the Max SP Length field | |
1339 | * in the QoS Capability element from delivery-enabled ACs, | |
1340 | * that are destined for the non-AP STA. | |
1341 | * | |
1342 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1343 | */ |
af818581 | 1344 | |
ce662b44 JB |
1345 | /* This will evaluate to 1, 3, 5 or 7. */ |
1346 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1347 | |
40b96408 | 1348 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1349 | return; |
1350 | } | |
af818581 | 1351 | |
47086fc5 JB |
1352 | if (!driver_release_tids) { |
1353 | struct sk_buff_head pending; | |
1354 | struct sk_buff *skb; | |
40b96408 JB |
1355 | int num = 0; |
1356 | u16 tids = 0; | |
af818581 | 1357 | |
47086fc5 | 1358 | skb_queue_head_init(&pending); |
af818581 | 1359 | |
47086fc5 JB |
1360 | while ((skb = __skb_dequeue(&frames))) { |
1361 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1362 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1363 | u8 *qoshdr = NULL; |
1364 | ||
1365 | num++; | |
af818581 | 1366 | |
47086fc5 JB |
1367 | /* |
1368 | * Tell TX path to send this frame even though the | |
1369 | * STA may still remain is PS mode after this frame | |
1370 | * exchange. | |
1371 | */ | |
1372 | info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE; | |
1373 | ||
1374 | /* | |
1375 | * Use MoreData flag to indicate whether there are | |
1376 | * more buffered frames for this STA | |
1377 | */ | |
24b9c373 | 1378 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1379 | hdr->frame_control |= |
1380 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1381 | else |
1382 | hdr->frame_control &= | |
1383 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1384 | |
40b96408 JB |
1385 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1386 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1387 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1388 | ||
1389 | /* set EOSP for the frame */ | |
47086fc5 | 1390 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && |
40b96408 JB |
1391 | qoshdr && skb_queue_empty(&frames)) |
1392 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
af818581 | 1393 | |
deeaee19 JB |
1394 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1395 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1396 | ||
40b96408 JB |
1397 | if (qoshdr) |
1398 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1399 | else | |
1400 | tids |= BIT(0); | |
1401 | ||
47086fc5 JB |
1402 | __skb_queue_tail(&pending, skb); |
1403 | } | |
af818581 | 1404 | |
40b96408 JB |
1405 | drv_allow_buffered_frames(local, sta, tids, num, |
1406 | reason, more_data); | |
1407 | ||
47086fc5 | 1408 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1409 | |
c868cb35 | 1410 | sta_info_recalc_tim(sta); |
af818581 JB |
1411 | } else { |
1412 | /* | |
4049e09a JB |
1413 | * We need to release a frame that is buffered somewhere in the |
1414 | * driver ... it'll have to handle that. | |
1415 | * Note that, as per the comment above, it'll also have to see | |
1416 | * if there is more than just one frame on the specific TID that | |
1417 | * we're releasing from, and it needs to set the more-data bit | |
1418 | * accordingly if we tell it that there's no more data. If we do | |
1419 | * tell it there's more data, then of course the more-data bit | |
1420 | * needs to be set anyway. | |
1421 | */ | |
1422 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1423 | n_frames, reason, more_data); |
4049e09a JB |
1424 | |
1425 | /* | |
1426 | * Note that we don't recalculate the TIM bit here as it would | |
1427 | * most likely have no effect at all unless the driver told us | |
1428 | * that the TID became empty before returning here from the | |
1429 | * release function. | |
1430 | * Either way, however, when the driver tells us that the TID | |
1431 | * became empty we'll do the TIM recalculation. | |
af818581 | 1432 | */ |
af818581 JB |
1433 | } |
1434 | } | |
1435 | ||
47086fc5 JB |
1436 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1437 | { | |
1438 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1439 | ||
1440 | /* | |
1441 | * If all ACs are delivery-enabled then we should reply | |
1442 | * from any of them, if only some are enabled we reply | |
1443 | * only from the non-enabled ones. | |
1444 | */ | |
1445 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1446 | ignore_for_response = 0; | |
1447 | ||
1448 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1449 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1450 | } | |
1451 | ||
1452 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1453 | { | |
1454 | int n_frames = sta->sta.max_sp; | |
1455 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1456 | ||
1457 | /* | |
1458 | * If we ever grow support for TSPEC this might happen if | |
1459 | * the TSPEC update from hostapd comes in between a trigger | |
1460 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1461 | * actually getting called. | |
1462 | */ | |
1463 | if (!delivery_enabled) | |
1464 | return; | |
1465 | ||
47086fc5 JB |
1466 | switch (sta->sta.max_sp) { |
1467 | case 1: | |
1468 | n_frames = 2; | |
1469 | break; | |
1470 | case 2: | |
1471 | n_frames = 4; | |
1472 | break; | |
1473 | case 3: | |
1474 | n_frames = 6; | |
1475 | break; | |
1476 | case 0: | |
1477 | /* XXX: what is a good value? */ | |
1478 | n_frames = 8; | |
1479 | break; | |
1480 | } | |
1481 | ||
1482 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1483 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1484 | } | |
1485 | ||
af818581 JB |
1486 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1487 | struct ieee80211_sta *pubsta, bool block) | |
1488 | { | |
1489 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1490 | ||
b5878a2d JB |
1491 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1492 | ||
af818581 | 1493 | if (block) |
c2c98fde JB |
1494 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1495 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1496 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1497 | } | |
1498 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1499 | |
37fbd908 JB |
1500 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1501 | { | |
1502 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1503 | struct ieee80211_local *local = sta->local; | |
1504 | struct sk_buff *skb; | |
1505 | struct skb_eosp_msg_data *data; | |
1506 | ||
1507 | trace_api_eosp(local, pubsta); | |
1508 | ||
1509 | skb = alloc_skb(0, GFP_ATOMIC); | |
1510 | if (!skb) { | |
1511 | /* too bad ... but race is better than loss */ | |
1512 | clear_sta_flag(sta, WLAN_STA_SP); | |
1513 | return; | |
1514 | } | |
1515 | ||
1516 | data = (void *)skb->cb; | |
1517 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1518 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1519 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1520 | skb_queue_tail(&local->skb_queue, skb); | |
1521 | tasklet_schedule(&local->tasklet); | |
1522 | } | |
1523 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1524 | ||
042ec453 JB |
1525 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1526 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1527 | { |
1528 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1529 | ||
948d887d | 1530 | if (WARN_ON(tid >= STA_TID_NUM)) |
042ec453 JB |
1531 | return; |
1532 | ||
948d887d JB |
1533 | if (buffered) |
1534 | set_bit(tid, &sta->driver_buffered_tids); | |
1535 | else | |
1536 | clear_bit(tid, &sta->driver_buffered_tids); | |
1537 | ||
c868cb35 | 1538 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1539 | } |
042ec453 | 1540 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |