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Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
[deliverable/linux.git] / net / mac80211 / sta_info.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/timer.h>
20 #include <linux/rtnetlink.h>
21
22 #include <net/mac80211.h>
23 #include "ieee80211_i.h"
24 #include "driver-ops.h"
25 #include "rate.h"
26 #include "sta_info.h"
27 #include "debugfs_sta.h"
28 #include "mesh.h"
29 #include "wme.h"
30
31 /**
32 * DOC: STA information lifetime rules
33 *
34 * STA info structures (&struct sta_info) are managed in a hash table
35 * for faster lookup and a list for iteration. They are managed using
36 * RCU, i.e. access to the list and hash table is protected by RCU.
37 *
38 * Upon allocating a STA info structure with sta_info_alloc(), the caller
39 * owns that structure. It must then insert it into the hash table using
40 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
41 * case (which acquires an rcu read section but must not be called from
42 * within one) will the pointer still be valid after the call. Note that
43 * the caller may not do much with the STA info before inserting it, in
44 * particular, it may not start any mesh peer link management or add
45 * encryption keys.
46 *
47 * When the insertion fails (sta_info_insert()) returns non-zero), the
48 * structure will have been freed by sta_info_insert()!
49 *
50 * Station entries are added by mac80211 when you establish a link with a
51 * peer. This means different things for the different type of interfaces
52 * we support. For a regular station this mean we add the AP sta when we
53 * receive an association response from the AP. For IBSS this occurs when
54 * get to know about a peer on the same IBSS. For WDS we add the sta for
55 * the peer immediately upon device open. When using AP mode we add stations
56 * for each respective station upon request from userspace through nl80211.
57 *
58 * In order to remove a STA info structure, various sta_info_destroy_*()
59 * calls are available.
60 *
61 * There is no concept of ownership on a STA entry, each structure is
62 * owned by the global hash table/list until it is removed. All users of
63 * the structure need to be RCU protected so that the structure won't be
64 * freed before they are done using it.
65 */
66
67 /* Caller must hold local->sta_mtx */
68 static int sta_info_hash_del(struct ieee80211_local *local,
69 struct sta_info *sta)
70 {
71 struct sta_info *s;
72
73 s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)],
74 lockdep_is_held(&local->sta_mtx));
75 if (!s)
76 return -ENOENT;
77 if (s == sta) {
78 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
79 s->hnext);
80 return 0;
81 }
82
83 while (rcu_access_pointer(s->hnext) &&
84 rcu_access_pointer(s->hnext) != sta)
85 s = rcu_dereference_protected(s->hnext,
86 lockdep_is_held(&local->sta_mtx));
87 if (rcu_access_pointer(s->hnext)) {
88 rcu_assign_pointer(s->hnext, sta->hnext);
89 return 0;
90 }
91
92 return -ENOENT;
93 }
94
95 static void __cleanup_single_sta(struct sta_info *sta)
96 {
97 int ac, i;
98 struct tid_ampdu_tx *tid_tx;
99 struct ieee80211_sub_if_data *sdata = sta->sdata;
100 struct ieee80211_local *local = sdata->local;
101 struct ps_data *ps;
102
103 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
104 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
105 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
106 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
107 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
108 ps = &sdata->bss->ps;
109 else if (ieee80211_vif_is_mesh(&sdata->vif))
110 ps = &sdata->u.mesh.ps;
111 else
112 return;
113
114 clear_sta_flag(sta, WLAN_STA_PS_STA);
115 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
116 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
117
118 atomic_dec(&ps->num_sta_ps);
119 }
120
121 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
122 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
123 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
124 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
125 }
126
127 if (ieee80211_vif_is_mesh(&sdata->vif))
128 mesh_sta_cleanup(sta);
129
130 cancel_work_sync(&sta->drv_deliver_wk);
131
132 /*
133 * Destroy aggregation state here. It would be nice to wait for the
134 * driver to finish aggregation stop and then clean up, but for now
135 * drivers have to handle aggregation stop being requested, followed
136 * directly by station destruction.
137 */
138 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
139 kfree(sta->ampdu_mlme.tid_start_tx[i]);
140 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
141 if (!tid_tx)
142 continue;
143 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
144 kfree(tid_tx);
145 }
146 }
147
148 static void cleanup_single_sta(struct sta_info *sta)
149 {
150 struct ieee80211_sub_if_data *sdata = sta->sdata;
151 struct ieee80211_local *local = sdata->local;
152
153 __cleanup_single_sta(sta);
154 sta_info_free(local, sta);
155 }
156
157 /* protected by RCU */
158 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
159 const u8 *addr)
160 {
161 struct ieee80211_local *local = sdata->local;
162 struct sta_info *sta;
163
164 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
165 lockdep_is_held(&local->sta_mtx));
166 while (sta) {
167 if (sta->sdata == sdata &&
168 ether_addr_equal(sta->sta.addr, addr))
169 break;
170 sta = rcu_dereference_check(sta->hnext,
171 lockdep_is_held(&local->sta_mtx));
172 }
173 return sta;
174 }
175
176 /*
177 * Get sta info either from the specified interface
178 * or from one of its vlans
179 */
180 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
181 const u8 *addr)
182 {
183 struct ieee80211_local *local = sdata->local;
184 struct sta_info *sta;
185
186 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
187 lockdep_is_held(&local->sta_mtx));
188 while (sta) {
189 if ((sta->sdata == sdata ||
190 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
191 ether_addr_equal(sta->sta.addr, addr))
192 break;
193 sta = rcu_dereference_check(sta->hnext,
194 lockdep_is_held(&local->sta_mtx));
195 }
196 return sta;
197 }
198
199 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
200 int idx)
201 {
202 struct ieee80211_local *local = sdata->local;
203 struct sta_info *sta;
204 int i = 0;
205
206 list_for_each_entry_rcu(sta, &local->sta_list, list) {
207 if (sdata != sta->sdata)
208 continue;
209 if (i < idx) {
210 ++i;
211 continue;
212 }
213 return sta;
214 }
215
216 return NULL;
217 }
218
219 /**
220 * sta_info_free - free STA
221 *
222 * @local: pointer to the global information
223 * @sta: STA info to free
224 *
225 * This function must undo everything done by sta_info_alloc()
226 * that may happen before sta_info_insert(). It may only be
227 * called when sta_info_insert() has not been attempted (and
228 * if that fails, the station is freed anyway.)
229 */
230 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
231 {
232 int i;
233
234 if (sta->rate_ctrl)
235 rate_control_free_sta(sta);
236
237 if (sta->tx_lat) {
238 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
239 kfree(sta->tx_lat[i].bins);
240 kfree(sta->tx_lat);
241 }
242
243 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
244
245 kfree(rcu_dereference_raw(sta->sta.rates));
246 kfree(sta);
247 }
248
249 /* Caller must hold local->sta_mtx */
250 static void sta_info_hash_add(struct ieee80211_local *local,
251 struct sta_info *sta)
252 {
253 lockdep_assert_held(&local->sta_mtx);
254 sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
255 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
256 }
257
258 static void sta_deliver_ps_frames(struct work_struct *wk)
259 {
260 struct sta_info *sta;
261
262 sta = container_of(wk, struct sta_info, drv_deliver_wk);
263
264 if (sta->dead)
265 return;
266
267 local_bh_disable();
268 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
269 ieee80211_sta_ps_deliver_wakeup(sta);
270 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
271 ieee80211_sta_ps_deliver_poll_response(sta);
272 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
273 ieee80211_sta_ps_deliver_uapsd(sta);
274 local_bh_enable();
275 }
276
277 static int sta_prepare_rate_control(struct ieee80211_local *local,
278 struct sta_info *sta, gfp_t gfp)
279 {
280 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
281 return 0;
282
283 sta->rate_ctrl = local->rate_ctrl;
284 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
285 &sta->sta, gfp);
286 if (!sta->rate_ctrl_priv)
287 return -ENOMEM;
288
289 return 0;
290 }
291
292 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
293 const u8 *addr, gfp_t gfp)
294 {
295 struct ieee80211_local *local = sdata->local;
296 struct sta_info *sta;
297 struct timespec uptime;
298 struct ieee80211_tx_latency_bin_ranges *tx_latency;
299 int i;
300
301 sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
302 if (!sta)
303 return NULL;
304
305 rcu_read_lock();
306 tx_latency = rcu_dereference(local->tx_latency);
307 /* init stations Tx latency statistics && TID bins */
308 if (tx_latency) {
309 sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS *
310 sizeof(struct ieee80211_tx_latency_stat),
311 GFP_ATOMIC);
312 if (!sta->tx_lat) {
313 rcu_read_unlock();
314 goto free;
315 }
316
317 if (tx_latency->n_ranges) {
318 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
319 /* size of bins is size of the ranges +1 */
320 sta->tx_lat[i].bin_count =
321 tx_latency->n_ranges + 1;
322 sta->tx_lat[i].bins =
323 kcalloc(sta->tx_lat[i].bin_count,
324 sizeof(u32), GFP_ATOMIC);
325 if (!sta->tx_lat[i].bins) {
326 rcu_read_unlock();
327 goto free;
328 }
329 }
330 }
331 }
332 rcu_read_unlock();
333
334 spin_lock_init(&sta->lock);
335 spin_lock_init(&sta->ps_lock);
336 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
337 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
338 mutex_init(&sta->ampdu_mlme.mtx);
339 #ifdef CONFIG_MAC80211_MESH
340 if (ieee80211_vif_is_mesh(&sdata->vif) &&
341 !sdata->u.mesh.user_mpm)
342 init_timer(&sta->plink_timer);
343 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
344 #endif
345
346 memcpy(sta->sta.addr, addr, ETH_ALEN);
347 sta->local = local;
348 sta->sdata = sdata;
349 sta->last_rx = jiffies;
350
351 sta->sta_state = IEEE80211_STA_NONE;
352
353 /* Mark TID as unreserved */
354 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
355
356 ktime_get_ts(&uptime);
357 sta->last_connected = uptime.tv_sec;
358 ewma_init(&sta->avg_signal, 1024, 8);
359 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
360 ewma_init(&sta->chain_signal_avg[i], 1024, 8);
361
362 if (sta_prepare_rate_control(local, sta, gfp))
363 goto free;
364
365 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
366 /*
367 * timer_to_tid must be initialized with identity mapping
368 * to enable session_timer's data differentiation. See
369 * sta_rx_agg_session_timer_expired for usage.
370 */
371 sta->timer_to_tid[i] = i;
372 }
373 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
374 skb_queue_head_init(&sta->ps_tx_buf[i]);
375 skb_queue_head_init(&sta->tx_filtered[i]);
376 }
377
378 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
379 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
380
381 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
382 if (sdata->vif.type == NL80211_IFTYPE_AP ||
383 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
384 struct ieee80211_supported_band *sband =
385 local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
386 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
387 IEEE80211_HT_CAP_SM_PS_SHIFT;
388 /*
389 * Assume that hostapd advertises our caps in the beacon and
390 * this is the known_smps_mode for a station that just assciated
391 */
392 switch (smps) {
393 case WLAN_HT_SMPS_CONTROL_DISABLED:
394 sta->known_smps_mode = IEEE80211_SMPS_OFF;
395 break;
396 case WLAN_HT_SMPS_CONTROL_STATIC:
397 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
398 break;
399 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
400 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
401 break;
402 default:
403 WARN_ON(1);
404 }
405 }
406
407 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
408 return sta;
409
410 free:
411 if (sta->tx_lat) {
412 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
413 kfree(sta->tx_lat[i].bins);
414 kfree(sta->tx_lat);
415 }
416 kfree(sta);
417 return NULL;
418 }
419
420 static int sta_info_insert_check(struct sta_info *sta)
421 {
422 struct ieee80211_sub_if_data *sdata = sta->sdata;
423
424 /*
425 * Can't be a WARN_ON because it can be triggered through a race:
426 * something inserts a STA (on one CPU) without holding the RTNL
427 * and another CPU turns off the net device.
428 */
429 if (unlikely(!ieee80211_sdata_running(sdata)))
430 return -ENETDOWN;
431
432 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
433 is_multicast_ether_addr(sta->sta.addr)))
434 return -EINVAL;
435
436 return 0;
437 }
438
439 static int sta_info_insert_drv_state(struct ieee80211_local *local,
440 struct ieee80211_sub_if_data *sdata,
441 struct sta_info *sta)
442 {
443 enum ieee80211_sta_state state;
444 int err = 0;
445
446 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
447 err = drv_sta_state(local, sdata, sta, state, state + 1);
448 if (err)
449 break;
450 }
451
452 if (!err) {
453 /*
454 * Drivers using legacy sta_add/sta_remove callbacks only
455 * get uploaded set to true after sta_add is called.
456 */
457 if (!local->ops->sta_add)
458 sta->uploaded = true;
459 return 0;
460 }
461
462 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
463 sdata_info(sdata,
464 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
465 sta->sta.addr, state + 1, err);
466 err = 0;
467 }
468
469 /* unwind on error */
470 for (; state > IEEE80211_STA_NOTEXIST; state--)
471 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
472
473 return err;
474 }
475
476 /*
477 * should be called with sta_mtx locked
478 * this function replaces the mutex lock
479 * with a RCU lock
480 */
481 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
482 {
483 struct ieee80211_local *local = sta->local;
484 struct ieee80211_sub_if_data *sdata = sta->sdata;
485 struct station_info sinfo;
486 int err = 0;
487
488 lockdep_assert_held(&local->sta_mtx);
489
490 /* check if STA exists already */
491 if (sta_info_get_bss(sdata, sta->sta.addr)) {
492 err = -EEXIST;
493 goto out_err;
494 }
495
496 local->num_sta++;
497 local->sta_generation++;
498 smp_mb();
499
500 /* simplify things and don't accept BA sessions yet */
501 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
502
503 /* make the station visible */
504 sta_info_hash_add(local, sta);
505
506 list_add_tail_rcu(&sta->list, &local->sta_list);
507
508 /* notify driver */
509 err = sta_info_insert_drv_state(local, sdata, sta);
510 if (err)
511 goto out_remove;
512
513 set_sta_flag(sta, WLAN_STA_INSERTED);
514 /* accept BA sessions now */
515 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
516
517 ieee80211_recalc_min_chandef(sdata);
518 ieee80211_sta_debugfs_add(sta);
519 rate_control_add_sta_debugfs(sta);
520
521 memset(&sinfo, 0, sizeof(sinfo));
522 sinfo.filled = 0;
523 sinfo.generation = local->sta_generation;
524 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
525
526 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
527
528 /* move reference to rcu-protected */
529 rcu_read_lock();
530 mutex_unlock(&local->sta_mtx);
531
532 if (ieee80211_vif_is_mesh(&sdata->vif))
533 mesh_accept_plinks_update(sdata);
534
535 return 0;
536 out_remove:
537 sta_info_hash_del(local, sta);
538 list_del_rcu(&sta->list);
539 local->num_sta--;
540 synchronize_net();
541 __cleanup_single_sta(sta);
542 out_err:
543 mutex_unlock(&local->sta_mtx);
544 rcu_read_lock();
545 return err;
546 }
547
548 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
549 {
550 struct ieee80211_local *local = sta->local;
551 int err;
552
553 might_sleep();
554
555 err = sta_info_insert_check(sta);
556 if (err) {
557 rcu_read_lock();
558 goto out_free;
559 }
560
561 mutex_lock(&local->sta_mtx);
562
563 err = sta_info_insert_finish(sta);
564 if (err)
565 goto out_free;
566
567 return 0;
568 out_free:
569 sta_info_free(local, sta);
570 return err;
571 }
572
573 int sta_info_insert(struct sta_info *sta)
574 {
575 int err = sta_info_insert_rcu(sta);
576
577 rcu_read_unlock();
578
579 return err;
580 }
581
582 static inline void __bss_tim_set(u8 *tim, u16 id)
583 {
584 /*
585 * This format has been mandated by the IEEE specifications,
586 * so this line may not be changed to use the __set_bit() format.
587 */
588 tim[id / 8] |= (1 << (id % 8));
589 }
590
591 static inline void __bss_tim_clear(u8 *tim, u16 id)
592 {
593 /*
594 * This format has been mandated by the IEEE specifications,
595 * so this line may not be changed to use the __clear_bit() format.
596 */
597 tim[id / 8] &= ~(1 << (id % 8));
598 }
599
600 static inline bool __bss_tim_get(u8 *tim, u16 id)
601 {
602 /*
603 * This format has been mandated by the IEEE specifications,
604 * so this line may not be changed to use the test_bit() format.
605 */
606 return tim[id / 8] & (1 << (id % 8));
607 }
608
609 static unsigned long ieee80211_tids_for_ac(int ac)
610 {
611 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
612 switch (ac) {
613 case IEEE80211_AC_VO:
614 return BIT(6) | BIT(7);
615 case IEEE80211_AC_VI:
616 return BIT(4) | BIT(5);
617 case IEEE80211_AC_BE:
618 return BIT(0) | BIT(3);
619 case IEEE80211_AC_BK:
620 return BIT(1) | BIT(2);
621 default:
622 WARN_ON(1);
623 return 0;
624 }
625 }
626
627 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
628 {
629 struct ieee80211_local *local = sta->local;
630 struct ps_data *ps;
631 bool indicate_tim = false;
632 u8 ignore_for_tim = sta->sta.uapsd_queues;
633 int ac;
634 u16 id;
635
636 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
637 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
638 if (WARN_ON_ONCE(!sta->sdata->bss))
639 return;
640
641 ps = &sta->sdata->bss->ps;
642 id = sta->sta.aid;
643 #ifdef CONFIG_MAC80211_MESH
644 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
645 ps = &sta->sdata->u.mesh.ps;
646 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
647 id = sta->plid % (IEEE80211_MAX_AID + 1);
648 #endif
649 } else {
650 return;
651 }
652
653 /* No need to do anything if the driver does all */
654 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
655 return;
656
657 if (sta->dead)
658 goto done;
659
660 /*
661 * If all ACs are delivery-enabled then we should build
662 * the TIM bit for all ACs anyway; if only some are then
663 * we ignore those and build the TIM bit using only the
664 * non-enabled ones.
665 */
666 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
667 ignore_for_tim = 0;
668
669 if (ignore_pending)
670 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
671
672 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
673 unsigned long tids;
674
675 if (ignore_for_tim & BIT(ac))
676 continue;
677
678 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
679 !skb_queue_empty(&sta->ps_tx_buf[ac]);
680 if (indicate_tim)
681 break;
682
683 tids = ieee80211_tids_for_ac(ac);
684
685 indicate_tim |=
686 sta->driver_buffered_tids & tids;
687 }
688
689 done:
690 spin_lock_bh(&local->tim_lock);
691
692 if (indicate_tim == __bss_tim_get(ps->tim, id))
693 goto out_unlock;
694
695 if (indicate_tim)
696 __bss_tim_set(ps->tim, id);
697 else
698 __bss_tim_clear(ps->tim, id);
699
700 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
701 local->tim_in_locked_section = true;
702 drv_set_tim(local, &sta->sta, indicate_tim);
703 local->tim_in_locked_section = false;
704 }
705
706 out_unlock:
707 spin_unlock_bh(&local->tim_lock);
708 }
709
710 void sta_info_recalc_tim(struct sta_info *sta)
711 {
712 __sta_info_recalc_tim(sta, false);
713 }
714
715 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
716 {
717 struct ieee80211_tx_info *info;
718 int timeout;
719
720 if (!skb)
721 return false;
722
723 info = IEEE80211_SKB_CB(skb);
724
725 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
726 timeout = (sta->listen_interval *
727 sta->sdata->vif.bss_conf.beacon_int *
728 32 / 15625) * HZ;
729 if (timeout < STA_TX_BUFFER_EXPIRE)
730 timeout = STA_TX_BUFFER_EXPIRE;
731 return time_after(jiffies, info->control.jiffies + timeout);
732 }
733
734
735 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
736 struct sta_info *sta, int ac)
737 {
738 unsigned long flags;
739 struct sk_buff *skb;
740
741 /*
742 * First check for frames that should expire on the filtered
743 * queue. Frames here were rejected by the driver and are on
744 * a separate queue to avoid reordering with normal PS-buffered
745 * frames. They also aren't accounted for right now in the
746 * total_ps_buffered counter.
747 */
748 for (;;) {
749 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
750 skb = skb_peek(&sta->tx_filtered[ac]);
751 if (sta_info_buffer_expired(sta, skb))
752 skb = __skb_dequeue(&sta->tx_filtered[ac]);
753 else
754 skb = NULL;
755 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
756
757 /*
758 * Frames are queued in order, so if this one
759 * hasn't expired yet we can stop testing. If
760 * we actually reached the end of the queue we
761 * also need to stop, of course.
762 */
763 if (!skb)
764 break;
765 ieee80211_free_txskb(&local->hw, skb);
766 }
767
768 /*
769 * Now also check the normal PS-buffered queue, this will
770 * only find something if the filtered queue was emptied
771 * since the filtered frames are all before the normal PS
772 * buffered frames.
773 */
774 for (;;) {
775 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
776 skb = skb_peek(&sta->ps_tx_buf[ac]);
777 if (sta_info_buffer_expired(sta, skb))
778 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
779 else
780 skb = NULL;
781 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
782
783 /*
784 * frames are queued in order, so if this one
785 * hasn't expired yet (or we reached the end of
786 * the queue) we can stop testing
787 */
788 if (!skb)
789 break;
790
791 local->total_ps_buffered--;
792 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
793 sta->sta.addr);
794 ieee80211_free_txskb(&local->hw, skb);
795 }
796
797 /*
798 * Finally, recalculate the TIM bit for this station -- it might
799 * now be clear because the station was too slow to retrieve its
800 * frames.
801 */
802 sta_info_recalc_tim(sta);
803
804 /*
805 * Return whether there are any frames still buffered, this is
806 * used to check whether the cleanup timer still needs to run,
807 * if there are no frames we don't need to rearm the timer.
808 */
809 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
810 skb_queue_empty(&sta->tx_filtered[ac]));
811 }
812
813 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
814 struct sta_info *sta)
815 {
816 bool have_buffered = false;
817 int ac;
818
819 /* This is only necessary for stations on BSS/MBSS interfaces */
820 if (!sta->sdata->bss &&
821 !ieee80211_vif_is_mesh(&sta->sdata->vif))
822 return false;
823
824 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
825 have_buffered |=
826 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
827
828 return have_buffered;
829 }
830
831 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
832 {
833 struct ieee80211_local *local;
834 struct ieee80211_sub_if_data *sdata;
835 int ret;
836
837 might_sleep();
838
839 if (!sta)
840 return -ENOENT;
841
842 local = sta->local;
843 sdata = sta->sdata;
844
845 lockdep_assert_held(&local->sta_mtx);
846
847 /*
848 * Before removing the station from the driver and
849 * rate control, it might still start new aggregation
850 * sessions -- block that to make sure the tear-down
851 * will be sufficient.
852 */
853 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
854 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
855
856 ret = sta_info_hash_del(local, sta);
857 if (WARN_ON(ret))
858 return ret;
859
860 /*
861 * for TDLS peers, make sure to return to the base channel before
862 * removal.
863 */
864 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
865 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
866 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
867 }
868
869 list_del_rcu(&sta->list);
870
871 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
872
873 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
874 rcu_access_pointer(sdata->u.vlan.sta) == sta)
875 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
876
877 return 0;
878 }
879
880 static void __sta_info_destroy_part2(struct sta_info *sta)
881 {
882 struct ieee80211_local *local = sta->local;
883 struct ieee80211_sub_if_data *sdata = sta->sdata;
884 struct station_info sinfo = {};
885 int ret;
886
887 /*
888 * NOTE: This assumes at least synchronize_net() was done
889 * after _part1 and before _part2!
890 */
891
892 might_sleep();
893 lockdep_assert_held(&local->sta_mtx);
894
895 /* now keys can no longer be reached */
896 ieee80211_free_sta_keys(local, sta);
897
898 /* disable TIM bit - last chance to tell driver */
899 __sta_info_recalc_tim(sta, true);
900
901 sta->dead = true;
902
903 local->num_sta--;
904 local->sta_generation++;
905
906 while (sta->sta_state > IEEE80211_STA_NONE) {
907 ret = sta_info_move_state(sta, sta->sta_state - 1);
908 if (ret) {
909 WARN_ON_ONCE(1);
910 break;
911 }
912 }
913
914 if (sta->uploaded) {
915 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
916 IEEE80211_STA_NOTEXIST);
917 WARN_ON_ONCE(ret != 0);
918 }
919
920 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
921
922 sta_set_sinfo(sta, &sinfo);
923 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
924
925 rate_control_remove_sta_debugfs(sta);
926 ieee80211_sta_debugfs_remove(sta);
927 ieee80211_recalc_min_chandef(sdata);
928
929 cleanup_single_sta(sta);
930 }
931
932 int __must_check __sta_info_destroy(struct sta_info *sta)
933 {
934 int err = __sta_info_destroy_part1(sta);
935
936 if (err)
937 return err;
938
939 synchronize_net();
940
941 __sta_info_destroy_part2(sta);
942
943 return 0;
944 }
945
946 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
947 {
948 struct sta_info *sta;
949 int ret;
950
951 mutex_lock(&sdata->local->sta_mtx);
952 sta = sta_info_get(sdata, addr);
953 ret = __sta_info_destroy(sta);
954 mutex_unlock(&sdata->local->sta_mtx);
955
956 return ret;
957 }
958
959 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
960 const u8 *addr)
961 {
962 struct sta_info *sta;
963 int ret;
964
965 mutex_lock(&sdata->local->sta_mtx);
966 sta = sta_info_get_bss(sdata, addr);
967 ret = __sta_info_destroy(sta);
968 mutex_unlock(&sdata->local->sta_mtx);
969
970 return ret;
971 }
972
973 static void sta_info_cleanup(unsigned long data)
974 {
975 struct ieee80211_local *local = (struct ieee80211_local *) data;
976 struct sta_info *sta;
977 bool timer_needed = false;
978
979 rcu_read_lock();
980 list_for_each_entry_rcu(sta, &local->sta_list, list)
981 if (sta_info_cleanup_expire_buffered(local, sta))
982 timer_needed = true;
983 rcu_read_unlock();
984
985 if (local->quiescing)
986 return;
987
988 if (!timer_needed)
989 return;
990
991 mod_timer(&local->sta_cleanup,
992 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
993 }
994
995 void sta_info_init(struct ieee80211_local *local)
996 {
997 spin_lock_init(&local->tim_lock);
998 mutex_init(&local->sta_mtx);
999 INIT_LIST_HEAD(&local->sta_list);
1000
1001 setup_timer(&local->sta_cleanup, sta_info_cleanup,
1002 (unsigned long)local);
1003 }
1004
1005 void sta_info_stop(struct ieee80211_local *local)
1006 {
1007 del_timer_sync(&local->sta_cleanup);
1008 }
1009
1010
1011 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1012 {
1013 struct ieee80211_local *local = sdata->local;
1014 struct sta_info *sta, *tmp;
1015 LIST_HEAD(free_list);
1016 int ret = 0;
1017
1018 might_sleep();
1019
1020 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1021 WARN_ON(vlans && !sdata->bss);
1022
1023 mutex_lock(&local->sta_mtx);
1024 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1025 if (sdata == sta->sdata ||
1026 (vlans && sdata->bss == sta->sdata->bss)) {
1027 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1028 list_add(&sta->free_list, &free_list);
1029 ret++;
1030 }
1031 }
1032
1033 if (!list_empty(&free_list)) {
1034 synchronize_net();
1035 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1036 __sta_info_destroy_part2(sta);
1037 }
1038 mutex_unlock(&local->sta_mtx);
1039
1040 return ret;
1041 }
1042
1043 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1044 unsigned long exp_time)
1045 {
1046 struct ieee80211_local *local = sdata->local;
1047 struct sta_info *sta, *tmp;
1048
1049 mutex_lock(&local->sta_mtx);
1050
1051 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1052 if (sdata != sta->sdata)
1053 continue;
1054
1055 if (time_after(jiffies, sta->last_rx + exp_time)) {
1056 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1057 sta->sta.addr);
1058
1059 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1060 test_sta_flag(sta, WLAN_STA_PS_STA))
1061 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1062
1063 WARN_ON(__sta_info_destroy(sta));
1064 }
1065 }
1066
1067 mutex_unlock(&local->sta_mtx);
1068 }
1069
1070 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1071 const u8 *addr,
1072 const u8 *localaddr)
1073 {
1074 struct sta_info *sta, *nxt;
1075
1076 /*
1077 * Just return a random station if localaddr is NULL
1078 * ... first in list.
1079 */
1080 for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
1081 if (localaddr &&
1082 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1083 continue;
1084 if (!sta->uploaded)
1085 return NULL;
1086 return &sta->sta;
1087 }
1088
1089 return NULL;
1090 }
1091 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1092
1093 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1094 const u8 *addr)
1095 {
1096 struct sta_info *sta;
1097
1098 if (!vif)
1099 return NULL;
1100
1101 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1102 if (!sta)
1103 return NULL;
1104
1105 if (!sta->uploaded)
1106 return NULL;
1107
1108 return &sta->sta;
1109 }
1110 EXPORT_SYMBOL(ieee80211_find_sta);
1111
1112 /* powersave support code */
1113 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1114 {
1115 struct ieee80211_sub_if_data *sdata = sta->sdata;
1116 struct ieee80211_local *local = sdata->local;
1117 struct sk_buff_head pending;
1118 int filtered = 0, buffered = 0, ac;
1119 unsigned long flags;
1120 struct ps_data *ps;
1121
1122 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1123 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1124 u.ap);
1125
1126 if (sdata->vif.type == NL80211_IFTYPE_AP)
1127 ps = &sdata->bss->ps;
1128 else if (ieee80211_vif_is_mesh(&sdata->vif))
1129 ps = &sdata->u.mesh.ps;
1130 else
1131 return;
1132
1133 clear_sta_flag(sta, WLAN_STA_SP);
1134
1135 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1136 sta->driver_buffered_tids = 0;
1137
1138 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1139 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1140
1141 skb_queue_head_init(&pending);
1142
1143 /* sync with ieee80211_tx_h_unicast_ps_buf */
1144 spin_lock(&sta->ps_lock);
1145 /* Send all buffered frames to the station */
1146 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1147 int count = skb_queue_len(&pending), tmp;
1148
1149 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1150 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1151 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1152 tmp = skb_queue_len(&pending);
1153 filtered += tmp - count;
1154 count = tmp;
1155
1156 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1157 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1158 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1159 tmp = skb_queue_len(&pending);
1160 buffered += tmp - count;
1161 }
1162
1163 ieee80211_add_pending_skbs(local, &pending);
1164
1165 /* now we're no longer in the deliver code */
1166 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1167
1168 /* The station might have polled and then woken up before we responded,
1169 * so clear these flags now to avoid them sticking around.
1170 */
1171 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1172 clear_sta_flag(sta, WLAN_STA_UAPSD);
1173 spin_unlock(&sta->ps_lock);
1174
1175 atomic_dec(&ps->num_sta_ps);
1176
1177 /* This station just woke up and isn't aware of our SMPS state */
1178 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1179 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1180 sdata->smps_mode) &&
1181 sta->known_smps_mode != sdata->bss->req_smps &&
1182 sta_info_tx_streams(sta) != 1) {
1183 ht_dbg(sdata,
1184 "%pM just woke up and MIMO capable - update SMPS\n",
1185 sta->sta.addr);
1186 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1187 sta->sta.addr,
1188 sdata->vif.bss_conf.bssid);
1189 }
1190
1191 local->total_ps_buffered -= buffered;
1192
1193 sta_info_recalc_tim(sta);
1194
1195 ps_dbg(sdata,
1196 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1197 sta->sta.addr, sta->sta.aid, filtered, buffered);
1198 }
1199
1200 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
1201 struct sta_info *sta, int tid,
1202 enum ieee80211_frame_release_type reason,
1203 bool call_driver)
1204 {
1205 struct ieee80211_local *local = sdata->local;
1206 struct ieee80211_qos_hdr *nullfunc;
1207 struct sk_buff *skb;
1208 int size = sizeof(*nullfunc);
1209 __le16 fc;
1210 bool qos = sta->sta.wme;
1211 struct ieee80211_tx_info *info;
1212 struct ieee80211_chanctx_conf *chanctx_conf;
1213
1214 if (qos) {
1215 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1216 IEEE80211_STYPE_QOS_NULLFUNC |
1217 IEEE80211_FCTL_FROMDS);
1218 } else {
1219 size -= 2;
1220 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1221 IEEE80211_STYPE_NULLFUNC |
1222 IEEE80211_FCTL_FROMDS);
1223 }
1224
1225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1226 if (!skb)
1227 return;
1228
1229 skb_reserve(skb, local->hw.extra_tx_headroom);
1230
1231 nullfunc = (void *) skb_put(skb, size);
1232 nullfunc->frame_control = fc;
1233 nullfunc->duration_id = 0;
1234 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1235 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1236 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1237 nullfunc->seq_ctrl = 0;
1238
1239 skb->priority = tid;
1240 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1241 if (qos) {
1242 nullfunc->qos_ctrl = cpu_to_le16(tid);
1243
1244 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1245 nullfunc->qos_ctrl |=
1246 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1247 }
1248
1249 info = IEEE80211_SKB_CB(skb);
1250
1251 /*
1252 * Tell TX path to send this frame even though the
1253 * STA may still remain is PS mode after this frame
1254 * exchange. Also set EOSP to indicate this packet
1255 * ends the poll/service period.
1256 */
1257 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1258 IEEE80211_TX_STATUS_EOSP |
1259 IEEE80211_TX_CTL_REQ_TX_STATUS;
1260
1261 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1262
1263 if (call_driver)
1264 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1265 reason, false);
1266
1267 skb->dev = sdata->dev;
1268
1269 rcu_read_lock();
1270 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1271 if (WARN_ON(!chanctx_conf)) {
1272 rcu_read_unlock();
1273 kfree_skb(skb);
1274 return;
1275 }
1276
1277 info->band = chanctx_conf->def.chan->band;
1278 ieee80211_xmit(sdata, skb);
1279 rcu_read_unlock();
1280 }
1281
1282 static int find_highest_prio_tid(unsigned long tids)
1283 {
1284 /* lower 3 TIDs aren't ordered perfectly */
1285 if (tids & 0xF8)
1286 return fls(tids) - 1;
1287 /* TID 0 is BE just like TID 3 */
1288 if (tids & BIT(0))
1289 return 0;
1290 return fls(tids) - 1;
1291 }
1292
1293 static void
1294 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1295 int n_frames, u8 ignored_acs,
1296 enum ieee80211_frame_release_type reason)
1297 {
1298 struct ieee80211_sub_if_data *sdata = sta->sdata;
1299 struct ieee80211_local *local = sdata->local;
1300 bool more_data = false;
1301 int ac;
1302 unsigned long driver_release_tids = 0;
1303 struct sk_buff_head frames;
1304
1305 /* Service or PS-Poll period starts */
1306 set_sta_flag(sta, WLAN_STA_SP);
1307
1308 __skb_queue_head_init(&frames);
1309
1310 /* Get response frame(s) and more data bit for the last one. */
1311 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1312 unsigned long tids;
1313
1314 if (ignored_acs & BIT(ac))
1315 continue;
1316
1317 tids = ieee80211_tids_for_ac(ac);
1318
1319 /* if we already have frames from software, then we can't also
1320 * release from hardware queues
1321 */
1322 if (skb_queue_empty(&frames))
1323 driver_release_tids |= sta->driver_buffered_tids & tids;
1324
1325 if (driver_release_tids) {
1326 /* If the driver has data on more than one TID then
1327 * certainly there's more data if we release just a
1328 * single frame now (from a single TID). This will
1329 * only happen for PS-Poll.
1330 */
1331 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1332 hweight16(driver_release_tids) > 1) {
1333 more_data = true;
1334 driver_release_tids =
1335 BIT(find_highest_prio_tid(
1336 driver_release_tids));
1337 break;
1338 }
1339 } else {
1340 struct sk_buff *skb;
1341
1342 while (n_frames > 0) {
1343 skb = skb_dequeue(&sta->tx_filtered[ac]);
1344 if (!skb) {
1345 skb = skb_dequeue(
1346 &sta->ps_tx_buf[ac]);
1347 if (skb)
1348 local->total_ps_buffered--;
1349 }
1350 if (!skb)
1351 break;
1352 n_frames--;
1353 __skb_queue_tail(&frames, skb);
1354 }
1355 }
1356
1357 /* If we have more frames buffered on this AC, then set the
1358 * more-data bit and abort the loop since we can't send more
1359 * data from other ACs before the buffered frames from this.
1360 */
1361 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1362 !skb_queue_empty(&sta->ps_tx_buf[ac])) {
1363 more_data = true;
1364 break;
1365 }
1366 }
1367
1368 if (skb_queue_empty(&frames) && !driver_release_tids) {
1369 int tid;
1370
1371 /*
1372 * For PS-Poll, this can only happen due to a race condition
1373 * when we set the TIM bit and the station notices it, but
1374 * before it can poll for the frame we expire it.
1375 *
1376 * For uAPSD, this is said in the standard (11.2.1.5 h):
1377 * At each unscheduled SP for a non-AP STA, the AP shall
1378 * attempt to transmit at least one MSDU or MMPDU, but no
1379 * more than the value specified in the Max SP Length field
1380 * in the QoS Capability element from delivery-enabled ACs,
1381 * that are destined for the non-AP STA.
1382 *
1383 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1384 */
1385
1386 /* This will evaluate to 1, 3, 5 or 7. */
1387 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1388
1389 ieee80211_send_null_response(sdata, sta, tid, reason, true);
1390 } else if (!driver_release_tids) {
1391 struct sk_buff_head pending;
1392 struct sk_buff *skb;
1393 int num = 0;
1394 u16 tids = 0;
1395 bool need_null = false;
1396
1397 skb_queue_head_init(&pending);
1398
1399 while ((skb = __skb_dequeue(&frames))) {
1400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1401 struct ieee80211_hdr *hdr = (void *) skb->data;
1402 u8 *qoshdr = NULL;
1403
1404 num++;
1405
1406 /*
1407 * Tell TX path to send this frame even though the
1408 * STA may still remain is PS mode after this frame
1409 * exchange.
1410 */
1411 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1412 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1413
1414 /*
1415 * Use MoreData flag to indicate whether there are
1416 * more buffered frames for this STA
1417 */
1418 if (more_data || !skb_queue_empty(&frames))
1419 hdr->frame_control |=
1420 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1421 else
1422 hdr->frame_control &=
1423 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1424
1425 if (ieee80211_is_data_qos(hdr->frame_control) ||
1426 ieee80211_is_qos_nullfunc(hdr->frame_control))
1427 qoshdr = ieee80211_get_qos_ctl(hdr);
1428
1429 tids |= BIT(skb->priority);
1430
1431 __skb_queue_tail(&pending, skb);
1432
1433 /* end service period after last frame or add one */
1434 if (!skb_queue_empty(&frames))
1435 continue;
1436
1437 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1438 /* for PS-Poll, there's only one frame */
1439 info->flags |= IEEE80211_TX_STATUS_EOSP |
1440 IEEE80211_TX_CTL_REQ_TX_STATUS;
1441 break;
1442 }
1443
1444 /* For uAPSD, things are a bit more complicated. If the
1445 * last frame has a QoS header (i.e. is a QoS-data or
1446 * QoS-nulldata frame) then just set the EOSP bit there
1447 * and be done.
1448 * If the frame doesn't have a QoS header (which means
1449 * it should be a bufferable MMPDU) then we can't set
1450 * the EOSP bit in the QoS header; add a QoS-nulldata
1451 * frame to the list to send it after the MMPDU.
1452 *
1453 * Note that this code is only in the mac80211-release
1454 * code path, we assume that the driver will not buffer
1455 * anything but QoS-data frames, or if it does, will
1456 * create the QoS-nulldata frame by itself if needed.
1457 *
1458 * Cf. 802.11-2012 10.2.1.10 (c).
1459 */
1460 if (qoshdr) {
1461 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1462
1463 info->flags |= IEEE80211_TX_STATUS_EOSP |
1464 IEEE80211_TX_CTL_REQ_TX_STATUS;
1465 } else {
1466 /* The standard isn't completely clear on this
1467 * as it says the more-data bit should be set
1468 * if there are more BUs. The QoS-Null frame
1469 * we're about to send isn't buffered yet, we
1470 * only create it below, but let's pretend it
1471 * was buffered just in case some clients only
1472 * expect more-data=0 when eosp=1.
1473 */
1474 hdr->frame_control |=
1475 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1476 need_null = true;
1477 num++;
1478 }
1479 break;
1480 }
1481
1482 drv_allow_buffered_frames(local, sta, tids, num,
1483 reason, more_data);
1484
1485 ieee80211_add_pending_skbs(local, &pending);
1486
1487 if (need_null)
1488 ieee80211_send_null_response(
1489 sdata, sta, find_highest_prio_tid(tids),
1490 reason, false);
1491
1492 sta_info_recalc_tim(sta);
1493 } else {
1494 /*
1495 * We need to release a frame that is buffered somewhere in the
1496 * driver ... it'll have to handle that.
1497 * Note that the driver also has to check the number of frames
1498 * on the TIDs we're releasing from - if there are more than
1499 * n_frames it has to set the more-data bit (if we didn't ask
1500 * it to set it anyway due to other buffered frames); if there
1501 * are fewer than n_frames it has to make sure to adjust that
1502 * to allow the service period to end properly.
1503 */
1504 drv_release_buffered_frames(local, sta, driver_release_tids,
1505 n_frames, reason, more_data);
1506
1507 /*
1508 * Note that we don't recalculate the TIM bit here as it would
1509 * most likely have no effect at all unless the driver told us
1510 * that the TID(s) became empty before returning here from the
1511 * release function.
1512 * Either way, however, when the driver tells us that the TID(s)
1513 * became empty we'll do the TIM recalculation.
1514 */
1515 }
1516 }
1517
1518 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1519 {
1520 u8 ignore_for_response = sta->sta.uapsd_queues;
1521
1522 /*
1523 * If all ACs are delivery-enabled then we should reply
1524 * from any of them, if only some are enabled we reply
1525 * only from the non-enabled ones.
1526 */
1527 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1528 ignore_for_response = 0;
1529
1530 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1531 IEEE80211_FRAME_RELEASE_PSPOLL);
1532 }
1533
1534 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1535 {
1536 int n_frames = sta->sta.max_sp;
1537 u8 delivery_enabled = sta->sta.uapsd_queues;
1538
1539 /*
1540 * If we ever grow support for TSPEC this might happen if
1541 * the TSPEC update from hostapd comes in between a trigger
1542 * frame setting WLAN_STA_UAPSD in the RX path and this
1543 * actually getting called.
1544 */
1545 if (!delivery_enabled)
1546 return;
1547
1548 switch (sta->sta.max_sp) {
1549 case 1:
1550 n_frames = 2;
1551 break;
1552 case 2:
1553 n_frames = 4;
1554 break;
1555 case 3:
1556 n_frames = 6;
1557 break;
1558 case 0:
1559 /* XXX: what is a good value? */
1560 n_frames = 128;
1561 break;
1562 }
1563
1564 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1565 IEEE80211_FRAME_RELEASE_UAPSD);
1566 }
1567
1568 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1569 struct ieee80211_sta *pubsta, bool block)
1570 {
1571 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1572
1573 trace_api_sta_block_awake(sta->local, pubsta, block);
1574
1575 if (block) {
1576 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1577 return;
1578 }
1579
1580 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1581 return;
1582
1583 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1584 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1585 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1586 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1587 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1588 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1589 /* must be asleep in this case */
1590 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1591 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1592 } else {
1593 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1594 }
1595 }
1596 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1597
1598 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1599 {
1600 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1601 struct ieee80211_local *local = sta->local;
1602
1603 trace_api_eosp(local, pubsta);
1604
1605 clear_sta_flag(sta, WLAN_STA_SP);
1606 }
1607 EXPORT_SYMBOL(ieee80211_sta_eosp);
1608
1609 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1610 u8 tid, bool buffered)
1611 {
1612 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1613
1614 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1615 return;
1616
1617 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1618
1619 if (buffered)
1620 set_bit(tid, &sta->driver_buffered_tids);
1621 else
1622 clear_bit(tid, &sta->driver_buffered_tids);
1623
1624 sta_info_recalc_tim(sta);
1625 }
1626 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1627
1628 int sta_info_move_state(struct sta_info *sta,
1629 enum ieee80211_sta_state new_state)
1630 {
1631 might_sleep();
1632
1633 if (sta->sta_state == new_state)
1634 return 0;
1635
1636 /* check allowed transitions first */
1637
1638 switch (new_state) {
1639 case IEEE80211_STA_NONE:
1640 if (sta->sta_state != IEEE80211_STA_AUTH)
1641 return -EINVAL;
1642 break;
1643 case IEEE80211_STA_AUTH:
1644 if (sta->sta_state != IEEE80211_STA_NONE &&
1645 sta->sta_state != IEEE80211_STA_ASSOC)
1646 return -EINVAL;
1647 break;
1648 case IEEE80211_STA_ASSOC:
1649 if (sta->sta_state != IEEE80211_STA_AUTH &&
1650 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1651 return -EINVAL;
1652 break;
1653 case IEEE80211_STA_AUTHORIZED:
1654 if (sta->sta_state != IEEE80211_STA_ASSOC)
1655 return -EINVAL;
1656 break;
1657 default:
1658 WARN(1, "invalid state %d", new_state);
1659 return -EINVAL;
1660 }
1661
1662 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1663 sta->sta.addr, new_state);
1664
1665 /*
1666 * notify the driver before the actual changes so it can
1667 * fail the transition
1668 */
1669 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1670 int err = drv_sta_state(sta->local, sta->sdata, sta,
1671 sta->sta_state, new_state);
1672 if (err)
1673 return err;
1674 }
1675
1676 /* reflect the change in all state variables */
1677
1678 switch (new_state) {
1679 case IEEE80211_STA_NONE:
1680 if (sta->sta_state == IEEE80211_STA_AUTH)
1681 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1682 break;
1683 case IEEE80211_STA_AUTH:
1684 if (sta->sta_state == IEEE80211_STA_NONE)
1685 set_bit(WLAN_STA_AUTH, &sta->_flags);
1686 else if (sta->sta_state == IEEE80211_STA_ASSOC)
1687 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1688 break;
1689 case IEEE80211_STA_ASSOC:
1690 if (sta->sta_state == IEEE80211_STA_AUTH) {
1691 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1692 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1693 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1694 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1695 !sta->sdata->u.vlan.sta))
1696 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1697 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1698 }
1699 break;
1700 case IEEE80211_STA_AUTHORIZED:
1701 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1702 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1703 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1704 !sta->sdata->u.vlan.sta))
1705 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1706 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1707 }
1708 break;
1709 default:
1710 break;
1711 }
1712
1713 sta->sta_state = new_state;
1714
1715 return 0;
1716 }
1717
1718 u8 sta_info_tx_streams(struct sta_info *sta)
1719 {
1720 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1721 u8 rx_streams;
1722
1723 if (!sta->sta.ht_cap.ht_supported)
1724 return 1;
1725
1726 if (sta->sta.vht_cap.vht_supported) {
1727 int i;
1728 u16 tx_mcs_map =
1729 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1730
1731 for (i = 7; i >= 0; i--)
1732 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1733 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1734 return i + 1;
1735 }
1736
1737 if (ht_cap->mcs.rx_mask[3])
1738 rx_streams = 4;
1739 else if (ht_cap->mcs.rx_mask[2])
1740 rx_streams = 3;
1741 else if (ht_cap->mcs.rx_mask[1])
1742 rx_streams = 2;
1743 else
1744 rx_streams = 1;
1745
1746 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1747 return rx_streams;
1748
1749 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1750 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1751 }
1752
1753 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
1754 {
1755 struct ieee80211_sub_if_data *sdata = sta->sdata;
1756 struct ieee80211_local *local = sdata->local;
1757 struct rate_control_ref *ref = NULL;
1758 struct timespec uptime;
1759 u32 thr = 0;
1760 int i, ac;
1761
1762 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
1763 ref = local->rate_ctrl;
1764
1765 sinfo->generation = sdata->local->sta_generation;
1766
1767 /* do before driver, so beacon filtering drivers have a
1768 * chance to e.g. just add the number of filtered beacons
1769 * (or just modify the value entirely, of course)
1770 */
1771 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1772 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
1773
1774 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
1775
1776 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
1777 BIT(NL80211_STA_INFO_STA_FLAGS) |
1778 BIT(NL80211_STA_INFO_BSS_PARAM) |
1779 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
1780 BIT(NL80211_STA_INFO_RX_DROP_MISC) |
1781 BIT(NL80211_STA_INFO_BEACON_LOSS);
1782
1783 ktime_get_ts(&uptime);
1784 sinfo->connected_time = uptime.tv_sec - sta->last_connected;
1785 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
1786
1787 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
1788 BIT(NL80211_STA_INFO_TX_BYTES)))) {
1789 sinfo->tx_bytes = 0;
1790 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1791 sinfo->tx_bytes += sta->tx_bytes[ac];
1792 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
1793 }
1794
1795 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
1796 sinfo->tx_packets = 0;
1797 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1798 sinfo->tx_packets += sta->tx_packets[ac];
1799 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
1800 }
1801
1802 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
1803 BIT(NL80211_STA_INFO_RX_BYTES)))) {
1804 sinfo->rx_bytes = sta->rx_bytes;
1805 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
1806 }
1807
1808 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
1809 sinfo->rx_packets = sta->rx_packets;
1810 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
1811 }
1812
1813 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
1814 sinfo->tx_retries = sta->tx_retry_count;
1815 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
1816 }
1817
1818 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
1819 sinfo->tx_failed = sta->tx_retry_failed;
1820 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
1821 }
1822
1823 sinfo->rx_dropped_misc = sta->rx_dropped;
1824 sinfo->beacon_loss_count = sta->beacon_loss_count;
1825
1826 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1827 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
1828 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
1829 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
1830 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
1831 }
1832
1833 if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
1834 (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
1835 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
1836 sinfo->signal = (s8)sta->last_signal;
1837 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
1838 }
1839
1840 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
1841 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
1842 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
1843 }
1844 }
1845
1846 if (sta->chains &&
1847 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
1848 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
1849 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
1850 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
1851
1852 sinfo->chains = sta->chains;
1853 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
1854 sinfo->chain_signal[i] = sta->chain_signal_last[i];
1855 sinfo->chain_signal_avg[i] =
1856 (s8) -ewma_read(&sta->chain_signal_avg[i]);
1857 }
1858 }
1859
1860 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
1861 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
1862 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
1863 }
1864
1865 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
1866 sta_set_rate_info_rx(sta, &sinfo->rxrate);
1867 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
1868 }
1869
1870 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
1871 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
1872 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
1873
1874 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
1875 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
1876 tidstats->rx_msdu = sta->rx_msdu[i];
1877 }
1878
1879 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
1880 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
1881 tidstats->tx_msdu = sta->tx_msdu[i];
1882 }
1883
1884 if (!(tidstats->filled &
1885 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
1886 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1887 tidstats->filled |=
1888 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
1889 tidstats->tx_msdu_retries = sta->tx_msdu_retries[i];
1890 }
1891
1892 if (!(tidstats->filled &
1893 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
1894 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1895 tidstats->filled |=
1896 BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
1897 tidstats->tx_msdu_failed = sta->tx_msdu_failed[i];
1898 }
1899 }
1900
1901 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1902 #ifdef CONFIG_MAC80211_MESH
1903 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
1904 BIT(NL80211_STA_INFO_PLID) |
1905 BIT(NL80211_STA_INFO_PLINK_STATE) |
1906 BIT(NL80211_STA_INFO_LOCAL_PM) |
1907 BIT(NL80211_STA_INFO_PEER_PM) |
1908 BIT(NL80211_STA_INFO_NONPEER_PM);
1909
1910 sinfo->llid = sta->llid;
1911 sinfo->plid = sta->plid;
1912 sinfo->plink_state = sta->plink_state;
1913 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
1914 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
1915 sinfo->t_offset = sta->t_offset;
1916 }
1917 sinfo->local_pm = sta->local_pm;
1918 sinfo->peer_pm = sta->peer_pm;
1919 sinfo->nonpeer_pm = sta->nonpeer_pm;
1920 #endif
1921 }
1922
1923 sinfo->bss_param.flags = 0;
1924 if (sdata->vif.bss_conf.use_cts_prot)
1925 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
1926 if (sdata->vif.bss_conf.use_short_preamble)
1927 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
1928 if (sdata->vif.bss_conf.use_short_slot)
1929 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
1930 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
1931 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
1932
1933 sinfo->sta_flags.set = 0;
1934 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
1935 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
1936 BIT(NL80211_STA_FLAG_WME) |
1937 BIT(NL80211_STA_FLAG_MFP) |
1938 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1939 BIT(NL80211_STA_FLAG_ASSOCIATED) |
1940 BIT(NL80211_STA_FLAG_TDLS_PEER);
1941 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1942 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
1943 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
1944 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
1945 if (sta->sta.wme)
1946 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
1947 if (test_sta_flag(sta, WLAN_STA_MFP))
1948 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
1949 if (test_sta_flag(sta, WLAN_STA_AUTH))
1950 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
1951 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1952 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1953 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1954 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
1955
1956 /* check if the driver has a SW RC implementation */
1957 if (ref && ref->ops->get_expected_throughput)
1958 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
1959 else
1960 thr = drv_get_expected_throughput(local, &sta->sta);
1961
1962 if (thr != 0) {
1963 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
1964 sinfo->expected_throughput = thr;
1965 }
1966 }
Linux kernel - Deliverables
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