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RDMA/nes: don't leak skb if carrier down
[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 * Copyright (C) 2015 Intel Deutschland GmbH
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/etherdevice.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/timer.h>
21 #include <linux/rtnetlink.h>
22
23 #include <net/mac80211.h>
24 #include "ieee80211_i.h"
25 #include "driver-ops.h"
26 #include "rate.h"
27 #include "sta_info.h"
28 #include "debugfs_sta.h"
29 #include "mesh.h"
30 #include "wme.h"
31
32 /**
33 * DOC: STA information lifetime rules
34 *
35 * STA info structures (&struct sta_info) are managed in a hash table
36 * for faster lookup and a list for iteration. They are managed using
37 * RCU, i.e. access to the list and hash table is protected by RCU.
38 *
39 * Upon allocating a STA info structure with sta_info_alloc(), the caller
40 * owns that structure. It must then insert it into the hash table using
41 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
42 * case (which acquires an rcu read section but must not be called from
43 * within one) will the pointer still be valid after the call. Note that
44 * the caller may not do much with the STA info before inserting it, in
45 * particular, it may not start any mesh peer link management or add
46 * encryption keys.
47 *
48 * When the insertion fails (sta_info_insert()) returns non-zero), the
49 * structure will have been freed by sta_info_insert()!
50 *
51 * Station entries are added by mac80211 when you establish a link with a
52 * peer. This means different things for the different type of interfaces
53 * we support. For a regular station this mean we add the AP sta when we
54 * receive an association response from the AP. For IBSS this occurs when
55 * get to know about a peer on the same IBSS. For WDS we add the sta for
56 * the peer immediately upon device open. When using AP mode we add stations
57 * for each respective station upon request from userspace through nl80211.
58 *
59 * In order to remove a STA info structure, various sta_info_destroy_*()
60 * calls are available.
61 *
62 * There is no concept of ownership on a STA entry, each structure is
63 * owned by the global hash table/list until it is removed. All users of
64 * the structure need to be RCU protected so that the structure won't be
65 * freed before they are done using it.
66 */
67
68 static const struct rhashtable_params sta_rht_params = {
69 .nelem_hint = 3, /* start small */
70 .automatic_shrinking = true,
71 .head_offset = offsetof(struct sta_info, hash_node),
72 .key_offset = offsetof(struct sta_info, addr),
73 .key_len = ETH_ALEN,
74 .hashfn = sta_addr_hash,
75 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
76 };
77
78 /* Caller must hold local->sta_mtx */
79 static int sta_info_hash_del(struct ieee80211_local *local,
80 struct sta_info *sta)
81 {
82 return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node,
83 sta_rht_params);
84 }
85
86 static void __cleanup_single_sta(struct sta_info *sta)
87 {
88 int ac, i;
89 struct tid_ampdu_tx *tid_tx;
90 struct ieee80211_sub_if_data *sdata = sta->sdata;
91 struct ieee80211_local *local = sdata->local;
92 struct ps_data *ps;
93
94 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
95 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
96 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
97 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
98 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
99 ps = &sdata->bss->ps;
100 else if (ieee80211_vif_is_mesh(&sdata->vif))
101 ps = &sdata->u.mesh.ps;
102 else
103 return;
104
105 clear_sta_flag(sta, WLAN_STA_PS_STA);
106 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
107 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
108
109 atomic_dec(&ps->num_sta_ps);
110 }
111
112 if (sta->sta.txq[0]) {
113 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
114 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
115 int n = skb_queue_len(&txqi->queue);
116
117 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
118 atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]);
119 txqi->byte_cnt = 0;
120 }
121 }
122
123 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
124 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
125 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
126 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
127 }
128
129 if (ieee80211_vif_is_mesh(&sdata->vif))
130 mesh_sta_cleanup(sta);
131
132 cancel_work_sync(&sta->drv_deliver_wk);
133
134 /*
135 * Destroy aggregation state here. It would be nice to wait for the
136 * driver to finish aggregation stop and then clean up, but for now
137 * drivers have to handle aggregation stop being requested, followed
138 * directly by station destruction.
139 */
140 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
141 kfree(sta->ampdu_mlme.tid_start_tx[i]);
142 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
143 if (!tid_tx)
144 continue;
145 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
146 kfree(tid_tx);
147 }
148 }
149
150 static void cleanup_single_sta(struct sta_info *sta)
151 {
152 struct ieee80211_sub_if_data *sdata = sta->sdata;
153 struct ieee80211_local *local = sdata->local;
154
155 __cleanup_single_sta(sta);
156 sta_info_free(local, sta);
157 }
158
159 /* protected by RCU */
160 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
161 const u8 *addr)
162 {
163 struct ieee80211_local *local = sdata->local;
164 struct sta_info *sta;
165 struct rhash_head *tmp;
166 const struct bucket_table *tbl;
167
168 rcu_read_lock();
169 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
170
171 for_each_sta_info(local, tbl, addr, sta, tmp) {
172 if (sta->sdata == sdata) {
173 rcu_read_unlock();
174 /* this is safe as the caller must already hold
175 * another rcu read section or the mutex
176 */
177 return sta;
178 }
179 }
180 rcu_read_unlock();
181 return NULL;
182 }
183
184 /*
185 * Get sta info either from the specified interface
186 * or from one of its vlans
187 */
188 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
189 const u8 *addr)
190 {
191 struct ieee80211_local *local = sdata->local;
192 struct sta_info *sta;
193 struct rhash_head *tmp;
194 const struct bucket_table *tbl;
195
196 rcu_read_lock();
197 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
198
199 for_each_sta_info(local, tbl, addr, sta, tmp) {
200 if (sta->sdata == sdata ||
201 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
202 rcu_read_unlock();
203 /* this is safe as the caller must already hold
204 * another rcu read section or the mutex
205 */
206 return sta;
207 }
208 }
209 rcu_read_unlock();
210 return NULL;
211 }
212
213 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
214 int idx)
215 {
216 struct ieee80211_local *local = sdata->local;
217 struct sta_info *sta;
218 int i = 0;
219
220 list_for_each_entry_rcu(sta, &local->sta_list, list) {
221 if (sdata != sta->sdata)
222 continue;
223 if (i < idx) {
224 ++i;
225 continue;
226 }
227 return sta;
228 }
229
230 return NULL;
231 }
232
233 /**
234 * sta_info_free - free STA
235 *
236 * @local: pointer to the global information
237 * @sta: STA info to free
238 *
239 * This function must undo everything done by sta_info_alloc()
240 * that may happen before sta_info_insert(). It may only be
241 * called when sta_info_insert() has not been attempted (and
242 * if that fails, the station is freed anyway.)
243 */
244 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
245 {
246 if (sta->rate_ctrl)
247 rate_control_free_sta(sta);
248
249 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
250
251 if (sta->sta.txq[0])
252 kfree(to_txq_info(sta->sta.txq[0]));
253 kfree(rcu_dereference_raw(sta->sta.rates));
254 #ifdef CONFIG_MAC80211_MESH
255 kfree(sta->mesh);
256 #endif
257 kfree(sta);
258 }
259
260 /* Caller must hold local->sta_mtx */
261 static void sta_info_hash_add(struct ieee80211_local *local,
262 struct sta_info *sta)
263 {
264 rhashtable_insert_fast(&local->sta_hash, &sta->hash_node,
265 sta_rht_params);
266 }
267
268 static void sta_deliver_ps_frames(struct work_struct *wk)
269 {
270 struct sta_info *sta;
271
272 sta = container_of(wk, struct sta_info, drv_deliver_wk);
273
274 if (sta->dead)
275 return;
276
277 local_bh_disable();
278 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
279 ieee80211_sta_ps_deliver_wakeup(sta);
280 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
281 ieee80211_sta_ps_deliver_poll_response(sta);
282 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
283 ieee80211_sta_ps_deliver_uapsd(sta);
284 local_bh_enable();
285 }
286
287 static int sta_prepare_rate_control(struct ieee80211_local *local,
288 struct sta_info *sta, gfp_t gfp)
289 {
290 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
291 return 0;
292
293 sta->rate_ctrl = local->rate_ctrl;
294 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
295 sta, gfp);
296 if (!sta->rate_ctrl_priv)
297 return -ENOMEM;
298
299 return 0;
300 }
301
302 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
303 const u8 *addr, gfp_t gfp)
304 {
305 struct ieee80211_local *local = sdata->local;
306 struct ieee80211_hw *hw = &local->hw;
307 struct sta_info *sta;
308 int i;
309
310 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
311 if (!sta)
312 return NULL;
313
314 spin_lock_init(&sta->lock);
315 spin_lock_init(&sta->ps_lock);
316 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
317 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
318 mutex_init(&sta->ampdu_mlme.mtx);
319 #ifdef CONFIG_MAC80211_MESH
320 if (ieee80211_vif_is_mesh(&sdata->vif)) {
321 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
322 if (!sta->mesh)
323 goto free;
324 spin_lock_init(&sta->mesh->plink_lock);
325 if (ieee80211_vif_is_mesh(&sdata->vif) &&
326 !sdata->u.mesh.user_mpm)
327 init_timer(&sta->mesh->plink_timer);
328 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
329 }
330 #endif
331
332 memcpy(sta->addr, addr, ETH_ALEN);
333 memcpy(sta->sta.addr, addr, ETH_ALEN);
334 sta->local = local;
335 sta->sdata = sdata;
336 sta->rx_stats.last_rx = jiffies;
337
338 sta->sta_state = IEEE80211_STA_NONE;
339
340 /* Mark TID as unreserved */
341 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
342
343 sta->last_connected = ktime_get_seconds();
344 ewma_signal_init(&sta->rx_stats.avg_signal);
345 for (i = 0; i < ARRAY_SIZE(sta->rx_stats.chain_signal_avg); i++)
346 ewma_signal_init(&sta->rx_stats.chain_signal_avg[i]);
347
348 if (local->ops->wake_tx_queue) {
349 void *txq_data;
350 int size = sizeof(struct txq_info) +
351 ALIGN(hw->txq_data_size, sizeof(void *));
352
353 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
354 if (!txq_data)
355 goto free;
356
357 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
358 struct txq_info *txq = txq_data + i * size;
359
360 ieee80211_init_tx_queue(sdata, sta, txq, i);
361 }
362 }
363
364 if (sta_prepare_rate_control(local, sta, gfp))
365 goto free_txq;
366
367 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
368 /*
369 * timer_to_tid must be initialized with identity mapping
370 * to enable session_timer's data differentiation. See
371 * sta_rx_agg_session_timer_expired for usage.
372 */
373 sta->timer_to_tid[i] = i;
374 }
375 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
376 skb_queue_head_init(&sta->ps_tx_buf[i]);
377 skb_queue_head_init(&sta->tx_filtered[i]);
378 }
379
380 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
381 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
382
383 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
384 if (sdata->vif.type == NL80211_IFTYPE_AP ||
385 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
386 struct ieee80211_supported_band *sband =
387 hw->wiphy->bands[ieee80211_get_sdata_band(sdata)];
388 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
389 IEEE80211_HT_CAP_SM_PS_SHIFT;
390 /*
391 * Assume that hostapd advertises our caps in the beacon and
392 * this is the known_smps_mode for a station that just assciated
393 */
394 switch (smps) {
395 case WLAN_HT_SMPS_CONTROL_DISABLED:
396 sta->known_smps_mode = IEEE80211_SMPS_OFF;
397 break;
398 case WLAN_HT_SMPS_CONTROL_STATIC:
399 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
400 break;
401 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
402 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
403 break;
404 default:
405 WARN_ON(1);
406 }
407 }
408
409 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
410
411 return sta;
412
413 free_txq:
414 if (sta->sta.txq[0])
415 kfree(to_txq_info(sta->sta.txq[0]));
416 free:
417 #ifdef CONFIG_MAC80211_MESH
418 kfree(sta->mesh);
419 #endif
420 kfree(sta);
421 return NULL;
422 }
423
424 static int sta_info_insert_check(struct sta_info *sta)
425 {
426 struct ieee80211_sub_if_data *sdata = sta->sdata;
427
428 /*
429 * Can't be a WARN_ON because it can be triggered through a race:
430 * something inserts a STA (on one CPU) without holding the RTNL
431 * and another CPU turns off the net device.
432 */
433 if (unlikely(!ieee80211_sdata_running(sdata)))
434 return -ENETDOWN;
435
436 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
437 is_multicast_ether_addr(sta->sta.addr)))
438 return -EINVAL;
439
440 /* Strictly speaking this isn't necessary as we hold the mutex, but
441 * the rhashtable code can't really deal with that distinction. We
442 * do require the mutex for correctness though.
443 */
444 rcu_read_lock();
445 lockdep_assert_held(&sdata->local->sta_mtx);
446 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
447 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
448 rcu_read_unlock();
449 return -ENOTUNIQ;
450 }
451 rcu_read_unlock();
452
453 return 0;
454 }
455
456 static int sta_info_insert_drv_state(struct ieee80211_local *local,
457 struct ieee80211_sub_if_data *sdata,
458 struct sta_info *sta)
459 {
460 enum ieee80211_sta_state state;
461 int err = 0;
462
463 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
464 err = drv_sta_state(local, sdata, sta, state, state + 1);
465 if (err)
466 break;
467 }
468
469 if (!err) {
470 /*
471 * Drivers using legacy sta_add/sta_remove callbacks only
472 * get uploaded set to true after sta_add is called.
473 */
474 if (!local->ops->sta_add)
475 sta->uploaded = true;
476 return 0;
477 }
478
479 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
480 sdata_info(sdata,
481 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
482 sta->sta.addr, state + 1, err);
483 err = 0;
484 }
485
486 /* unwind on error */
487 for (; state > IEEE80211_STA_NOTEXIST; state--)
488 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
489
490 return err;
491 }
492
493 /*
494 * should be called with sta_mtx locked
495 * this function replaces the mutex lock
496 * with a RCU lock
497 */
498 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
499 {
500 struct ieee80211_local *local = sta->local;
501 struct ieee80211_sub_if_data *sdata = sta->sdata;
502 struct station_info *sinfo;
503 int err = 0;
504
505 lockdep_assert_held(&local->sta_mtx);
506
507 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
508 if (!sinfo) {
509 err = -ENOMEM;
510 goto out_err;
511 }
512
513 /* check if STA exists already */
514 if (sta_info_get_bss(sdata, sta->sta.addr)) {
515 err = -EEXIST;
516 goto out_err;
517 }
518
519 local->num_sta++;
520 local->sta_generation++;
521 smp_mb();
522
523 /* simplify things and don't accept BA sessions yet */
524 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
525
526 /* make the station visible */
527 sta_info_hash_add(local, sta);
528
529 list_add_tail_rcu(&sta->list, &local->sta_list);
530
531 /* notify driver */
532 err = sta_info_insert_drv_state(local, sdata, sta);
533 if (err)
534 goto out_remove;
535
536 set_sta_flag(sta, WLAN_STA_INSERTED);
537 /* accept BA sessions now */
538 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
539
540 ieee80211_sta_debugfs_add(sta);
541 rate_control_add_sta_debugfs(sta);
542
543 sinfo->generation = local->sta_generation;
544 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
545 kfree(sinfo);
546
547 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
548
549 /* move reference to rcu-protected */
550 rcu_read_lock();
551 mutex_unlock(&local->sta_mtx);
552
553 if (ieee80211_vif_is_mesh(&sdata->vif))
554 mesh_accept_plinks_update(sdata);
555
556 return 0;
557 out_remove:
558 sta_info_hash_del(local, sta);
559 list_del_rcu(&sta->list);
560 local->num_sta--;
561 synchronize_net();
562 __cleanup_single_sta(sta);
563 out_err:
564 mutex_unlock(&local->sta_mtx);
565 kfree(sinfo);
566 rcu_read_lock();
567 return err;
568 }
569
570 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
571 {
572 struct ieee80211_local *local = sta->local;
573 int err;
574
575 might_sleep();
576
577 mutex_lock(&local->sta_mtx);
578
579 err = sta_info_insert_check(sta);
580 if (err) {
581 mutex_unlock(&local->sta_mtx);
582 rcu_read_lock();
583 goto out_free;
584 }
585
586 err = sta_info_insert_finish(sta);
587 if (err)
588 goto out_free;
589
590 return 0;
591 out_free:
592 sta_info_free(local, sta);
593 return err;
594 }
595
596 int sta_info_insert(struct sta_info *sta)
597 {
598 int err = sta_info_insert_rcu(sta);
599
600 rcu_read_unlock();
601
602 return err;
603 }
604
605 static inline void __bss_tim_set(u8 *tim, u16 id)
606 {
607 /*
608 * This format has been mandated by the IEEE specifications,
609 * so this line may not be changed to use the __set_bit() format.
610 */
611 tim[id / 8] |= (1 << (id % 8));
612 }
613
614 static inline void __bss_tim_clear(u8 *tim, u16 id)
615 {
616 /*
617 * This format has been mandated by the IEEE specifications,
618 * so this line may not be changed to use the __clear_bit() format.
619 */
620 tim[id / 8] &= ~(1 << (id % 8));
621 }
622
623 static inline bool __bss_tim_get(u8 *tim, u16 id)
624 {
625 /*
626 * This format has been mandated by the IEEE specifications,
627 * so this line may not be changed to use the test_bit() format.
628 */
629 return tim[id / 8] & (1 << (id % 8));
630 }
631
632 static unsigned long ieee80211_tids_for_ac(int ac)
633 {
634 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
635 switch (ac) {
636 case IEEE80211_AC_VO:
637 return BIT(6) | BIT(7);
638 case IEEE80211_AC_VI:
639 return BIT(4) | BIT(5);
640 case IEEE80211_AC_BE:
641 return BIT(0) | BIT(3);
642 case IEEE80211_AC_BK:
643 return BIT(1) | BIT(2);
644 default:
645 WARN_ON(1);
646 return 0;
647 }
648 }
649
650 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
651 {
652 struct ieee80211_local *local = sta->local;
653 struct ps_data *ps;
654 bool indicate_tim = false;
655 u8 ignore_for_tim = sta->sta.uapsd_queues;
656 int ac;
657 u16 id = sta->sta.aid;
658
659 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
660 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
661 if (WARN_ON_ONCE(!sta->sdata->bss))
662 return;
663
664 ps = &sta->sdata->bss->ps;
665 #ifdef CONFIG_MAC80211_MESH
666 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
667 ps = &sta->sdata->u.mesh.ps;
668 #endif
669 } else {
670 return;
671 }
672
673 /* No need to do anything if the driver does all */
674 if (ieee80211_hw_check(&local->hw, AP_LINK_PS))
675 return;
676
677 if (sta->dead)
678 goto done;
679
680 /*
681 * If all ACs are delivery-enabled then we should build
682 * the TIM bit for all ACs anyway; if only some are then
683 * we ignore those and build the TIM bit using only the
684 * non-enabled ones.
685 */
686 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
687 ignore_for_tim = 0;
688
689 if (ignore_pending)
690 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
691
692 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
693 unsigned long tids;
694
695 if (ignore_for_tim & BIT(ac))
696 continue;
697
698 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
699 !skb_queue_empty(&sta->ps_tx_buf[ac]);
700 if (indicate_tim)
701 break;
702
703 tids = ieee80211_tids_for_ac(ac);
704
705 indicate_tim |=
706 sta->driver_buffered_tids & tids;
707 indicate_tim |=
708 sta->txq_buffered_tids & tids;
709 }
710
711 done:
712 spin_lock_bh(&local->tim_lock);
713
714 if (indicate_tim == __bss_tim_get(ps->tim, id))
715 goto out_unlock;
716
717 if (indicate_tim)
718 __bss_tim_set(ps->tim, id);
719 else
720 __bss_tim_clear(ps->tim, id);
721
722 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
723 local->tim_in_locked_section = true;
724 drv_set_tim(local, &sta->sta, indicate_tim);
725 local->tim_in_locked_section = false;
726 }
727
728 out_unlock:
729 spin_unlock_bh(&local->tim_lock);
730 }
731
732 void sta_info_recalc_tim(struct sta_info *sta)
733 {
734 __sta_info_recalc_tim(sta, false);
735 }
736
737 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
738 {
739 struct ieee80211_tx_info *info;
740 int timeout;
741
742 if (!skb)
743 return false;
744
745 info = IEEE80211_SKB_CB(skb);
746
747 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
748 timeout = (sta->listen_interval *
749 sta->sdata->vif.bss_conf.beacon_int *
750 32 / 15625) * HZ;
751 if (timeout < STA_TX_BUFFER_EXPIRE)
752 timeout = STA_TX_BUFFER_EXPIRE;
753 return time_after(jiffies, info->control.jiffies + timeout);
754 }
755
756
757 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
758 struct sta_info *sta, int ac)
759 {
760 unsigned long flags;
761 struct sk_buff *skb;
762
763 /*
764 * First check for frames that should expire on the filtered
765 * queue. Frames here were rejected by the driver and are on
766 * a separate queue to avoid reordering with normal PS-buffered
767 * frames. They also aren't accounted for right now in the
768 * total_ps_buffered counter.
769 */
770 for (;;) {
771 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
772 skb = skb_peek(&sta->tx_filtered[ac]);
773 if (sta_info_buffer_expired(sta, skb))
774 skb = __skb_dequeue(&sta->tx_filtered[ac]);
775 else
776 skb = NULL;
777 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
778
779 /*
780 * Frames are queued in order, so if this one
781 * hasn't expired yet we can stop testing. If
782 * we actually reached the end of the queue we
783 * also need to stop, of course.
784 */
785 if (!skb)
786 break;
787 ieee80211_free_txskb(&local->hw, skb);
788 }
789
790 /*
791 * Now also check the normal PS-buffered queue, this will
792 * only find something if the filtered queue was emptied
793 * since the filtered frames are all before the normal PS
794 * buffered frames.
795 */
796 for (;;) {
797 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
798 skb = skb_peek(&sta->ps_tx_buf[ac]);
799 if (sta_info_buffer_expired(sta, skb))
800 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
801 else
802 skb = NULL;
803 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
804
805 /*
806 * frames are queued in order, so if this one
807 * hasn't expired yet (or we reached the end of
808 * the queue) we can stop testing
809 */
810 if (!skb)
811 break;
812
813 local->total_ps_buffered--;
814 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
815 sta->sta.addr);
816 ieee80211_free_txskb(&local->hw, skb);
817 }
818
819 /*
820 * Finally, recalculate the TIM bit for this station -- it might
821 * now be clear because the station was too slow to retrieve its
822 * frames.
823 */
824 sta_info_recalc_tim(sta);
825
826 /*
827 * Return whether there are any frames still buffered, this is
828 * used to check whether the cleanup timer still needs to run,
829 * if there are no frames we don't need to rearm the timer.
830 */
831 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
832 skb_queue_empty(&sta->tx_filtered[ac]));
833 }
834
835 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
836 struct sta_info *sta)
837 {
838 bool have_buffered = false;
839 int ac;
840
841 /* This is only necessary for stations on BSS/MBSS interfaces */
842 if (!sta->sdata->bss &&
843 !ieee80211_vif_is_mesh(&sta->sdata->vif))
844 return false;
845
846 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
847 have_buffered |=
848 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
849
850 return have_buffered;
851 }
852
853 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
854 {
855 struct ieee80211_local *local;
856 struct ieee80211_sub_if_data *sdata;
857 int ret;
858
859 might_sleep();
860
861 if (!sta)
862 return -ENOENT;
863
864 local = sta->local;
865 sdata = sta->sdata;
866
867 lockdep_assert_held(&local->sta_mtx);
868
869 /*
870 * Before removing the station from the driver and
871 * rate control, it might still start new aggregation
872 * sessions -- block that to make sure the tear-down
873 * will be sufficient.
874 */
875 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
876 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
877
878 ret = sta_info_hash_del(local, sta);
879 if (WARN_ON(ret))
880 return ret;
881
882 /*
883 * for TDLS peers, make sure to return to the base channel before
884 * removal.
885 */
886 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
887 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
888 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
889 }
890
891 list_del_rcu(&sta->list);
892 sta->removed = true;
893
894 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
895
896 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
897 rcu_access_pointer(sdata->u.vlan.sta) == sta)
898 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
899
900 return 0;
901 }
902
903 static void __sta_info_destroy_part2(struct sta_info *sta)
904 {
905 struct ieee80211_local *local = sta->local;
906 struct ieee80211_sub_if_data *sdata = sta->sdata;
907 struct station_info *sinfo;
908 int ret;
909
910 /*
911 * NOTE: This assumes at least synchronize_net() was done
912 * after _part1 and before _part2!
913 */
914
915 might_sleep();
916 lockdep_assert_held(&local->sta_mtx);
917
918 /* now keys can no longer be reached */
919 ieee80211_free_sta_keys(local, sta);
920
921 /* disable TIM bit - last chance to tell driver */
922 __sta_info_recalc_tim(sta, true);
923
924 sta->dead = true;
925
926 local->num_sta--;
927 local->sta_generation++;
928
929 while (sta->sta_state > IEEE80211_STA_NONE) {
930 ret = sta_info_move_state(sta, sta->sta_state - 1);
931 if (ret) {
932 WARN_ON_ONCE(1);
933 break;
934 }
935 }
936
937 if (sta->uploaded) {
938 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
939 IEEE80211_STA_NOTEXIST);
940 WARN_ON_ONCE(ret != 0);
941 }
942
943 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
944
945 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
946 if (sinfo)
947 sta_set_sinfo(sta, sinfo);
948 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
949 kfree(sinfo);
950
951 rate_control_remove_sta_debugfs(sta);
952 ieee80211_sta_debugfs_remove(sta);
953
954 cleanup_single_sta(sta);
955 }
956
957 int __must_check __sta_info_destroy(struct sta_info *sta)
958 {
959 int err = __sta_info_destroy_part1(sta);
960
961 if (err)
962 return err;
963
964 synchronize_net();
965
966 __sta_info_destroy_part2(sta);
967
968 return 0;
969 }
970
971 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
972 {
973 struct sta_info *sta;
974 int ret;
975
976 mutex_lock(&sdata->local->sta_mtx);
977 sta = sta_info_get(sdata, addr);
978 ret = __sta_info_destroy(sta);
979 mutex_unlock(&sdata->local->sta_mtx);
980
981 return ret;
982 }
983
984 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
985 const u8 *addr)
986 {
987 struct sta_info *sta;
988 int ret;
989
990 mutex_lock(&sdata->local->sta_mtx);
991 sta = sta_info_get_bss(sdata, addr);
992 ret = __sta_info_destroy(sta);
993 mutex_unlock(&sdata->local->sta_mtx);
994
995 return ret;
996 }
997
998 static void sta_info_cleanup(unsigned long data)
999 {
1000 struct ieee80211_local *local = (struct ieee80211_local *) data;
1001 struct sta_info *sta;
1002 bool timer_needed = false;
1003
1004 rcu_read_lock();
1005 list_for_each_entry_rcu(sta, &local->sta_list, list)
1006 if (sta_info_cleanup_expire_buffered(local, sta))
1007 timer_needed = true;
1008 rcu_read_unlock();
1009
1010 if (local->quiescing)
1011 return;
1012
1013 if (!timer_needed)
1014 return;
1015
1016 mod_timer(&local->sta_cleanup,
1017 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1018 }
1019
1020 u32 sta_addr_hash(const void *key, u32 length, u32 seed)
1021 {
1022 return jhash(key, ETH_ALEN, seed);
1023 }
1024
1025 int sta_info_init(struct ieee80211_local *local)
1026 {
1027 int err;
1028
1029 err = rhashtable_init(&local->sta_hash, &sta_rht_params);
1030 if (err)
1031 return err;
1032
1033 spin_lock_init(&local->tim_lock);
1034 mutex_init(&local->sta_mtx);
1035 INIT_LIST_HEAD(&local->sta_list);
1036
1037 setup_timer(&local->sta_cleanup, sta_info_cleanup,
1038 (unsigned long)local);
1039 return 0;
1040 }
1041
1042 void sta_info_stop(struct ieee80211_local *local)
1043 {
1044 del_timer_sync(&local->sta_cleanup);
1045 rhashtable_destroy(&local->sta_hash);
1046 }
1047
1048
1049 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1050 {
1051 struct ieee80211_local *local = sdata->local;
1052 struct sta_info *sta, *tmp;
1053 LIST_HEAD(free_list);
1054 int ret = 0;
1055
1056 might_sleep();
1057
1058 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1059 WARN_ON(vlans && !sdata->bss);
1060
1061 mutex_lock(&local->sta_mtx);
1062 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1063 if (sdata == sta->sdata ||
1064 (vlans && sdata->bss == sta->sdata->bss)) {
1065 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1066 list_add(&sta->free_list, &free_list);
1067 ret++;
1068 }
1069 }
1070
1071 if (!list_empty(&free_list)) {
1072 synchronize_net();
1073 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1074 __sta_info_destroy_part2(sta);
1075 }
1076 mutex_unlock(&local->sta_mtx);
1077
1078 return ret;
1079 }
1080
1081 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1082 unsigned long exp_time)
1083 {
1084 struct ieee80211_local *local = sdata->local;
1085 struct sta_info *sta, *tmp;
1086
1087 mutex_lock(&local->sta_mtx);
1088
1089 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1090 if (sdata != sta->sdata)
1091 continue;
1092
1093 if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) {
1094 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1095 sta->sta.addr);
1096
1097 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1098 test_sta_flag(sta, WLAN_STA_PS_STA))
1099 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1100
1101 WARN_ON(__sta_info_destroy(sta));
1102 }
1103 }
1104
1105 mutex_unlock(&local->sta_mtx);
1106 }
1107
1108 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1109 const u8 *addr,
1110 const u8 *localaddr)
1111 {
1112 struct ieee80211_local *local = hw_to_local(hw);
1113 struct sta_info *sta;
1114 struct rhash_head *tmp;
1115 const struct bucket_table *tbl;
1116
1117 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
1118
1119 /*
1120 * Just return a random station if localaddr is NULL
1121 * ... first in list.
1122 */
1123 for_each_sta_info(local, tbl, addr, sta, tmp) {
1124 if (localaddr &&
1125 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1126 continue;
1127 if (!sta->uploaded)
1128 return NULL;
1129 return &sta->sta;
1130 }
1131
1132 return NULL;
1133 }
1134 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1135
1136 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1137 const u8 *addr)
1138 {
1139 struct sta_info *sta;
1140
1141 if (!vif)
1142 return NULL;
1143
1144 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1145 if (!sta)
1146 return NULL;
1147
1148 if (!sta->uploaded)
1149 return NULL;
1150
1151 return &sta->sta;
1152 }
1153 EXPORT_SYMBOL(ieee80211_find_sta);
1154
1155 /* powersave support code */
1156 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1157 {
1158 struct ieee80211_sub_if_data *sdata = sta->sdata;
1159 struct ieee80211_local *local = sdata->local;
1160 struct sk_buff_head pending;
1161 int filtered = 0, buffered = 0, ac, i;
1162 unsigned long flags;
1163 struct ps_data *ps;
1164
1165 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1166 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1167 u.ap);
1168
1169 if (sdata->vif.type == NL80211_IFTYPE_AP)
1170 ps = &sdata->bss->ps;
1171 else if (ieee80211_vif_is_mesh(&sdata->vif))
1172 ps = &sdata->u.mesh.ps;
1173 else
1174 return;
1175
1176 clear_sta_flag(sta, WLAN_STA_SP);
1177
1178 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1179 sta->driver_buffered_tids = 0;
1180 sta->txq_buffered_tids = 0;
1181
1182 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1183 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1184
1185 if (sta->sta.txq[0]) {
1186 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1187 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
1188
1189 if (!skb_queue_len(&txqi->queue))
1190 continue;
1191
1192 drv_wake_tx_queue(local, txqi);
1193 }
1194 }
1195
1196 skb_queue_head_init(&pending);
1197
1198 /* sync with ieee80211_tx_h_unicast_ps_buf */
1199 spin_lock(&sta->ps_lock);
1200 /* Send all buffered frames to the station */
1201 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1202 int count = skb_queue_len(&pending), tmp;
1203
1204 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1205 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1206 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1207 tmp = skb_queue_len(&pending);
1208 filtered += tmp - count;
1209 count = tmp;
1210
1211 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1212 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1213 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1214 tmp = skb_queue_len(&pending);
1215 buffered += tmp - count;
1216 }
1217
1218 ieee80211_add_pending_skbs(local, &pending);
1219
1220 /* now we're no longer in the deliver code */
1221 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1222
1223 /* The station might have polled and then woken up before we responded,
1224 * so clear these flags now to avoid them sticking around.
1225 */
1226 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1227 clear_sta_flag(sta, WLAN_STA_UAPSD);
1228 spin_unlock(&sta->ps_lock);
1229
1230 atomic_dec(&ps->num_sta_ps);
1231
1232 /* This station just woke up and isn't aware of our SMPS state */
1233 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1234 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1235 sdata->smps_mode) &&
1236 sta->known_smps_mode != sdata->bss->req_smps &&
1237 sta_info_tx_streams(sta) != 1) {
1238 ht_dbg(sdata,
1239 "%pM just woke up and MIMO capable - update SMPS\n",
1240 sta->sta.addr);
1241 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1242 sta->sta.addr,
1243 sdata->vif.bss_conf.bssid);
1244 }
1245
1246 local->total_ps_buffered -= buffered;
1247
1248 sta_info_recalc_tim(sta);
1249
1250 ps_dbg(sdata,
1251 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1252 sta->sta.addr, sta->sta.aid, filtered, buffered);
1253
1254 ieee80211_check_fast_xmit(sta);
1255 }
1256
1257 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1258 enum ieee80211_frame_release_type reason,
1259 bool call_driver, bool more_data)
1260 {
1261 struct ieee80211_sub_if_data *sdata = sta->sdata;
1262 struct ieee80211_local *local = sdata->local;
1263 struct ieee80211_qos_hdr *nullfunc;
1264 struct sk_buff *skb;
1265 int size = sizeof(*nullfunc);
1266 __le16 fc;
1267 bool qos = sta->sta.wme;
1268 struct ieee80211_tx_info *info;
1269 struct ieee80211_chanctx_conf *chanctx_conf;
1270
1271 if (qos) {
1272 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1273 IEEE80211_STYPE_QOS_NULLFUNC |
1274 IEEE80211_FCTL_FROMDS);
1275 } else {
1276 size -= 2;
1277 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1278 IEEE80211_STYPE_NULLFUNC |
1279 IEEE80211_FCTL_FROMDS);
1280 }
1281
1282 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1283 if (!skb)
1284 return;
1285
1286 skb_reserve(skb, local->hw.extra_tx_headroom);
1287
1288 nullfunc = (void *) skb_put(skb, size);
1289 nullfunc->frame_control = fc;
1290 nullfunc->duration_id = 0;
1291 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1292 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1293 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1294 nullfunc->seq_ctrl = 0;
1295
1296 skb->priority = tid;
1297 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1298 if (qos) {
1299 nullfunc->qos_ctrl = cpu_to_le16(tid);
1300
1301 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1302 nullfunc->qos_ctrl |=
1303 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1304 if (more_data)
1305 nullfunc->frame_control |=
1306 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1307 }
1308 }
1309
1310 info = IEEE80211_SKB_CB(skb);
1311
1312 /*
1313 * Tell TX path to send this frame even though the
1314 * STA may still remain is PS mode after this frame
1315 * exchange. Also set EOSP to indicate this packet
1316 * ends the poll/service period.
1317 */
1318 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1319 IEEE80211_TX_STATUS_EOSP |
1320 IEEE80211_TX_CTL_REQ_TX_STATUS;
1321
1322 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1323
1324 if (call_driver)
1325 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1326 reason, false);
1327
1328 skb->dev = sdata->dev;
1329
1330 rcu_read_lock();
1331 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1332 if (WARN_ON(!chanctx_conf)) {
1333 rcu_read_unlock();
1334 kfree_skb(skb);
1335 return;
1336 }
1337
1338 info->band = chanctx_conf->def.chan->band;
1339 ieee80211_xmit(sdata, sta, skb);
1340 rcu_read_unlock();
1341 }
1342
1343 static int find_highest_prio_tid(unsigned long tids)
1344 {
1345 /* lower 3 TIDs aren't ordered perfectly */
1346 if (tids & 0xF8)
1347 return fls(tids) - 1;
1348 /* TID 0 is BE just like TID 3 */
1349 if (tids & BIT(0))
1350 return 0;
1351 return fls(tids) - 1;
1352 }
1353
1354 /* Indicates if the MORE_DATA bit should be set in the last
1355 * frame obtained by ieee80211_sta_ps_get_frames.
1356 * Note that driver_release_tids is relevant only if
1357 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1358 */
1359 static bool
1360 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1361 enum ieee80211_frame_release_type reason,
1362 unsigned long driver_release_tids)
1363 {
1364 int ac;
1365
1366 /* If the driver has data on more than one TID then
1367 * certainly there's more data if we release just a
1368 * single frame now (from a single TID). This will
1369 * only happen for PS-Poll.
1370 */
1371 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1372 hweight16(driver_release_tids) > 1)
1373 return true;
1374
1375 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1376 if (ignored_acs & BIT(ac))
1377 continue;
1378
1379 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1380 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1381 return true;
1382 }
1383
1384 return false;
1385 }
1386
1387 static void
1388 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1389 enum ieee80211_frame_release_type reason,
1390 struct sk_buff_head *frames,
1391 unsigned long *driver_release_tids)
1392 {
1393 struct ieee80211_sub_if_data *sdata = sta->sdata;
1394 struct ieee80211_local *local = sdata->local;
1395 int ac;
1396
1397 /* Get response frame(s) and more data bit for the last one. */
1398 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1399 unsigned long tids;
1400
1401 if (ignored_acs & BIT(ac))
1402 continue;
1403
1404 tids = ieee80211_tids_for_ac(ac);
1405
1406 /* if we already have frames from software, then we can't also
1407 * release from hardware queues
1408 */
1409 if (skb_queue_empty(frames)) {
1410 *driver_release_tids |=
1411 sta->driver_buffered_tids & tids;
1412 *driver_release_tids |= sta->txq_buffered_tids & tids;
1413 }
1414
1415 if (!*driver_release_tids) {
1416 struct sk_buff *skb;
1417
1418 while (n_frames > 0) {
1419 skb = skb_dequeue(&sta->tx_filtered[ac]);
1420 if (!skb) {
1421 skb = skb_dequeue(
1422 &sta->ps_tx_buf[ac]);
1423 if (skb)
1424 local->total_ps_buffered--;
1425 }
1426 if (!skb)
1427 break;
1428 n_frames--;
1429 __skb_queue_tail(frames, skb);
1430 }
1431 }
1432
1433 /* If we have more frames buffered on this AC, then abort the
1434 * loop since we can't send more data from other ACs before
1435 * the buffered frames from this.
1436 */
1437 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1438 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1439 break;
1440 }
1441 }
1442
1443 static void
1444 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1445 int n_frames, u8 ignored_acs,
1446 enum ieee80211_frame_release_type reason)
1447 {
1448 struct ieee80211_sub_if_data *sdata = sta->sdata;
1449 struct ieee80211_local *local = sdata->local;
1450 unsigned long driver_release_tids = 0;
1451 struct sk_buff_head frames;
1452 bool more_data;
1453
1454 /* Service or PS-Poll period starts */
1455 set_sta_flag(sta, WLAN_STA_SP);
1456
1457 __skb_queue_head_init(&frames);
1458
1459 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1460 &frames, &driver_release_tids);
1461
1462 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1463
1464 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1465 driver_release_tids =
1466 BIT(find_highest_prio_tid(driver_release_tids));
1467
1468 if (skb_queue_empty(&frames) && !driver_release_tids) {
1469 int tid;
1470
1471 /*
1472 * For PS-Poll, this can only happen due to a race condition
1473 * when we set the TIM bit and the station notices it, but
1474 * before it can poll for the frame we expire it.
1475 *
1476 * For uAPSD, this is said in the standard (11.2.1.5 h):
1477 * At each unscheduled SP for a non-AP STA, the AP shall
1478 * attempt to transmit at least one MSDU or MMPDU, but no
1479 * more than the value specified in the Max SP Length field
1480 * in the QoS Capability element from delivery-enabled ACs,
1481 * that are destined for the non-AP STA.
1482 *
1483 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1484 */
1485
1486 /* This will evaluate to 1, 3, 5 or 7. */
1487 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1488
1489 ieee80211_send_null_response(sta, tid, reason, true, false);
1490 } else if (!driver_release_tids) {
1491 struct sk_buff_head pending;
1492 struct sk_buff *skb;
1493 int num = 0;
1494 u16 tids = 0;
1495 bool need_null = false;
1496
1497 skb_queue_head_init(&pending);
1498
1499 while ((skb = __skb_dequeue(&frames))) {
1500 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1501 struct ieee80211_hdr *hdr = (void *) skb->data;
1502 u8 *qoshdr = NULL;
1503
1504 num++;
1505
1506 /*
1507 * Tell TX path to send this frame even though the
1508 * STA may still remain is PS mode after this frame
1509 * exchange.
1510 */
1511 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1512 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1513
1514 /*
1515 * Use MoreData flag to indicate whether there are
1516 * more buffered frames for this STA
1517 */
1518 if (more_data || !skb_queue_empty(&frames))
1519 hdr->frame_control |=
1520 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1521 else
1522 hdr->frame_control &=
1523 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1524
1525 if (ieee80211_is_data_qos(hdr->frame_control) ||
1526 ieee80211_is_qos_nullfunc(hdr->frame_control))
1527 qoshdr = ieee80211_get_qos_ctl(hdr);
1528
1529 tids |= BIT(skb->priority);
1530
1531 __skb_queue_tail(&pending, skb);
1532
1533 /* end service period after last frame or add one */
1534 if (!skb_queue_empty(&frames))
1535 continue;
1536
1537 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1538 /* for PS-Poll, there's only one frame */
1539 info->flags |= IEEE80211_TX_STATUS_EOSP |
1540 IEEE80211_TX_CTL_REQ_TX_STATUS;
1541 break;
1542 }
1543
1544 /* For uAPSD, things are a bit more complicated. If the
1545 * last frame has a QoS header (i.e. is a QoS-data or
1546 * QoS-nulldata frame) then just set the EOSP bit there
1547 * and be done.
1548 * If the frame doesn't have a QoS header (which means
1549 * it should be a bufferable MMPDU) then we can't set
1550 * the EOSP bit in the QoS header; add a QoS-nulldata
1551 * frame to the list to send it after the MMPDU.
1552 *
1553 * Note that this code is only in the mac80211-release
1554 * code path, we assume that the driver will not buffer
1555 * anything but QoS-data frames, or if it does, will
1556 * create the QoS-nulldata frame by itself if needed.
1557 *
1558 * Cf. 802.11-2012 10.2.1.10 (c).
1559 */
1560 if (qoshdr) {
1561 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1562
1563 info->flags |= IEEE80211_TX_STATUS_EOSP |
1564 IEEE80211_TX_CTL_REQ_TX_STATUS;
1565 } else {
1566 /* The standard isn't completely clear on this
1567 * as it says the more-data bit should be set
1568 * if there are more BUs. The QoS-Null frame
1569 * we're about to send isn't buffered yet, we
1570 * only create it below, but let's pretend it
1571 * was buffered just in case some clients only
1572 * expect more-data=0 when eosp=1.
1573 */
1574 hdr->frame_control |=
1575 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1576 need_null = true;
1577 num++;
1578 }
1579 break;
1580 }
1581
1582 drv_allow_buffered_frames(local, sta, tids, num,
1583 reason, more_data);
1584
1585 ieee80211_add_pending_skbs(local, &pending);
1586
1587 if (need_null)
1588 ieee80211_send_null_response(
1589 sta, find_highest_prio_tid(tids),
1590 reason, false, false);
1591
1592 sta_info_recalc_tim(sta);
1593 } else {
1594 unsigned long tids = sta->txq_buffered_tids & driver_release_tids;
1595 int tid;
1596
1597 /*
1598 * We need to release a frame that is buffered somewhere in the
1599 * driver ... it'll have to handle that.
1600 * Note that the driver also has to check the number of frames
1601 * on the TIDs we're releasing from - if there are more than
1602 * n_frames it has to set the more-data bit (if we didn't ask
1603 * it to set it anyway due to other buffered frames); if there
1604 * are fewer than n_frames it has to make sure to adjust that
1605 * to allow the service period to end properly.
1606 */
1607 drv_release_buffered_frames(local, sta, driver_release_tids,
1608 n_frames, reason, more_data);
1609
1610 /*
1611 * Note that we don't recalculate the TIM bit here as it would
1612 * most likely have no effect at all unless the driver told us
1613 * that the TID(s) became empty before returning here from the
1614 * release function.
1615 * Either way, however, when the driver tells us that the TID(s)
1616 * became empty or we find that a txq became empty, we'll do the
1617 * TIM recalculation.
1618 */
1619
1620 if (!sta->sta.txq[0])
1621 return;
1622
1623 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1624 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]);
1625
1626 if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue))
1627 continue;
1628
1629 sta_info_recalc_tim(sta);
1630 break;
1631 }
1632 }
1633 }
1634
1635 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1636 {
1637 u8 ignore_for_response = sta->sta.uapsd_queues;
1638
1639 /*
1640 * If all ACs are delivery-enabled then we should reply
1641 * from any of them, if only some are enabled we reply
1642 * only from the non-enabled ones.
1643 */
1644 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1645 ignore_for_response = 0;
1646
1647 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1648 IEEE80211_FRAME_RELEASE_PSPOLL);
1649 }
1650
1651 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1652 {
1653 int n_frames = sta->sta.max_sp;
1654 u8 delivery_enabled = sta->sta.uapsd_queues;
1655
1656 /*
1657 * If we ever grow support for TSPEC this might happen if
1658 * the TSPEC update from hostapd comes in between a trigger
1659 * frame setting WLAN_STA_UAPSD in the RX path and this
1660 * actually getting called.
1661 */
1662 if (!delivery_enabled)
1663 return;
1664
1665 switch (sta->sta.max_sp) {
1666 case 1:
1667 n_frames = 2;
1668 break;
1669 case 2:
1670 n_frames = 4;
1671 break;
1672 case 3:
1673 n_frames = 6;
1674 break;
1675 case 0:
1676 /* XXX: what is a good value? */
1677 n_frames = 128;
1678 break;
1679 }
1680
1681 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1682 IEEE80211_FRAME_RELEASE_UAPSD);
1683 }
1684
1685 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1686 struct ieee80211_sta *pubsta, bool block)
1687 {
1688 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1689
1690 trace_api_sta_block_awake(sta->local, pubsta, block);
1691
1692 if (block) {
1693 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1694 ieee80211_clear_fast_xmit(sta);
1695 return;
1696 }
1697
1698 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1699 return;
1700
1701 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1702 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1703 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1704 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1705 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1706 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1707 /* must be asleep in this case */
1708 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1709 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1710 } else {
1711 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1712 ieee80211_check_fast_xmit(sta);
1713 }
1714 }
1715 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1716
1717 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1718 {
1719 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1720 struct ieee80211_local *local = sta->local;
1721
1722 trace_api_eosp(local, pubsta);
1723
1724 clear_sta_flag(sta, WLAN_STA_SP);
1725 }
1726 EXPORT_SYMBOL(ieee80211_sta_eosp);
1727
1728 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1729 {
1730 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1731 enum ieee80211_frame_release_type reason;
1732 bool more_data;
1733
1734 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1735
1736 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1737 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1738 reason, 0);
1739
1740 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1741 }
1742 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1743
1744 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1745 u8 tid, bool buffered)
1746 {
1747 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1748
1749 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1750 return;
1751
1752 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1753
1754 if (buffered)
1755 set_bit(tid, &sta->driver_buffered_tids);
1756 else
1757 clear_bit(tid, &sta->driver_buffered_tids);
1758
1759 sta_info_recalc_tim(sta);
1760 }
1761 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1762
1763 int sta_info_move_state(struct sta_info *sta,
1764 enum ieee80211_sta_state new_state)
1765 {
1766 might_sleep();
1767
1768 if (sta->sta_state == new_state)
1769 return 0;
1770
1771 /* check allowed transitions first */
1772
1773 switch (new_state) {
1774 case IEEE80211_STA_NONE:
1775 if (sta->sta_state != IEEE80211_STA_AUTH)
1776 return -EINVAL;
1777 break;
1778 case IEEE80211_STA_AUTH:
1779 if (sta->sta_state != IEEE80211_STA_NONE &&
1780 sta->sta_state != IEEE80211_STA_ASSOC)
1781 return -EINVAL;
1782 break;
1783 case IEEE80211_STA_ASSOC:
1784 if (sta->sta_state != IEEE80211_STA_AUTH &&
1785 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1786 return -EINVAL;
1787 break;
1788 case IEEE80211_STA_AUTHORIZED:
1789 if (sta->sta_state != IEEE80211_STA_ASSOC)
1790 return -EINVAL;
1791 break;
1792 default:
1793 WARN(1, "invalid state %d", new_state);
1794 return -EINVAL;
1795 }
1796
1797 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1798 sta->sta.addr, new_state);
1799
1800 /*
1801 * notify the driver before the actual changes so it can
1802 * fail the transition
1803 */
1804 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1805 int err = drv_sta_state(sta->local, sta->sdata, sta,
1806 sta->sta_state, new_state);
1807 if (err)
1808 return err;
1809 }
1810
1811 /* reflect the change in all state variables */
1812
1813 switch (new_state) {
1814 case IEEE80211_STA_NONE:
1815 if (sta->sta_state == IEEE80211_STA_AUTH)
1816 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1817 break;
1818 case IEEE80211_STA_AUTH:
1819 if (sta->sta_state == IEEE80211_STA_NONE) {
1820 set_bit(WLAN_STA_AUTH, &sta->_flags);
1821 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1822 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1823 ieee80211_recalc_min_chandef(sta->sdata);
1824 }
1825 break;
1826 case IEEE80211_STA_ASSOC:
1827 if (sta->sta_state == IEEE80211_STA_AUTH) {
1828 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1829 ieee80211_recalc_min_chandef(sta->sdata);
1830 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1831 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1832 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1833 !sta->sdata->u.vlan.sta))
1834 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1835 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1836 ieee80211_clear_fast_xmit(sta);
1837 }
1838 break;
1839 case IEEE80211_STA_AUTHORIZED:
1840 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1841 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1842 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1843 !sta->sdata->u.vlan.sta))
1844 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1845 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1846 ieee80211_check_fast_xmit(sta);
1847 }
1848 break;
1849 default:
1850 break;
1851 }
1852
1853 sta->sta_state = new_state;
1854
1855 return 0;
1856 }
1857
1858 u8 sta_info_tx_streams(struct sta_info *sta)
1859 {
1860 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1861 u8 rx_streams;
1862
1863 if (!sta->sta.ht_cap.ht_supported)
1864 return 1;
1865
1866 if (sta->sta.vht_cap.vht_supported) {
1867 int i;
1868 u16 tx_mcs_map =
1869 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1870
1871 for (i = 7; i >= 0; i--)
1872 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1873 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1874 return i + 1;
1875 }
1876
1877 if (ht_cap->mcs.rx_mask[3])
1878 rx_streams = 4;
1879 else if (ht_cap->mcs.rx_mask[2])
1880 rx_streams = 3;
1881 else if (ht_cap->mcs.rx_mask[1])
1882 rx_streams = 2;
1883 else
1884 rx_streams = 1;
1885
1886 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1887 return rx_streams;
1888
1889 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1890 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1891 }
1892
1893 static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
1894 {
1895 rinfo->flags = 0;
1896
1897 if (sta->rx_stats.last_rate_flag & RX_FLAG_HT) {
1898 rinfo->flags |= RATE_INFO_FLAGS_MCS;
1899 rinfo->mcs = sta->rx_stats.last_rate_idx;
1900 } else if (sta->rx_stats.last_rate_flag & RX_FLAG_VHT) {
1901 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
1902 rinfo->nss = sta->rx_stats.last_rate_vht_nss;
1903 rinfo->mcs = sta->rx_stats.last_rate_idx;
1904 } else {
1905 struct ieee80211_supported_band *sband;
1906 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
1907 u16 brate;
1908
1909 sband = sta->local->hw.wiphy->bands[
1910 ieee80211_get_sdata_band(sta->sdata)];
1911 brate = sband->bitrates[sta->rx_stats.last_rate_idx].bitrate;
1912 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
1913 }
1914
1915 if (sta->rx_stats.last_rate_flag & RX_FLAG_SHORT_GI)
1916 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1917
1918 if (sta->rx_stats.last_rate_flag & RX_FLAG_5MHZ)
1919 rinfo->bw = RATE_INFO_BW_5;
1920 else if (sta->rx_stats.last_rate_flag & RX_FLAG_10MHZ)
1921 rinfo->bw = RATE_INFO_BW_10;
1922 else if (sta->rx_stats.last_rate_flag & RX_FLAG_40MHZ)
1923 rinfo->bw = RATE_INFO_BW_40;
1924 else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_80MHZ)
1925 rinfo->bw = RATE_INFO_BW_80;
1926 else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_160MHZ)
1927 rinfo->bw = RATE_INFO_BW_160;
1928 else
1929 rinfo->bw = RATE_INFO_BW_20;
1930 }
1931
1932 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
1933 {
1934 struct ieee80211_sub_if_data *sdata = sta->sdata;
1935 struct ieee80211_local *local = sdata->local;
1936 struct rate_control_ref *ref = NULL;
1937 u32 thr = 0;
1938 int i, ac;
1939
1940 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
1941 ref = local->rate_ctrl;
1942
1943 sinfo->generation = sdata->local->sta_generation;
1944
1945 /* do before driver, so beacon filtering drivers have a
1946 * chance to e.g. just add the number of filtered beacons
1947 * (or just modify the value entirely, of course)
1948 */
1949 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1950 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
1951
1952 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
1953
1954 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
1955 BIT(NL80211_STA_INFO_STA_FLAGS) |
1956 BIT(NL80211_STA_INFO_BSS_PARAM) |
1957 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
1958 BIT(NL80211_STA_INFO_RX_DROP_MISC);
1959
1960 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1961 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
1962 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
1963 }
1964
1965 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
1966 sinfo->inactive_time =
1967 jiffies_to_msecs(jiffies - sta->rx_stats.last_rx);
1968
1969 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
1970 BIT(NL80211_STA_INFO_TX_BYTES)))) {
1971 sinfo->tx_bytes = 0;
1972 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1973 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
1974 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
1975 }
1976
1977 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
1978 sinfo->tx_packets = 0;
1979 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1980 sinfo->tx_packets += sta->tx_stats.packets[ac];
1981 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
1982 }
1983
1984 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
1985 BIT(NL80211_STA_INFO_RX_BYTES)))) {
1986 sinfo->rx_bytes = sta->rx_stats.bytes;
1987 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
1988 }
1989
1990 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
1991 sinfo->rx_packets = sta->rx_stats.packets;
1992 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
1993 }
1994
1995 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
1996 sinfo->tx_retries = sta->status_stats.retry_count;
1997 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
1998 }
1999
2000 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
2001 sinfo->tx_failed = sta->status_stats.retry_failed;
2002 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
2003 }
2004
2005 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2006
2007 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2008 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2009 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
2010 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2011 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2012 }
2013
2014 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2015 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2016 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
2017 sinfo->signal = (s8)sta->rx_stats.last_signal;
2018 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
2019 }
2020
2021 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
2022 sinfo->signal_avg =
2023 -ewma_signal_read(&sta->rx_stats.avg_signal);
2024 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
2025 }
2026 }
2027
2028 if (sta->rx_stats.chains &&
2029 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
2030 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2031 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
2032 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2033
2034 sinfo->chains = sta->rx_stats.chains;
2035 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2036 sinfo->chain_signal[i] =
2037 sta->rx_stats.chain_signal_last[i];
2038 sinfo->chain_signal_avg[i] =
2039 -ewma_signal_read(&sta->rx_stats.chain_signal_avg[i]);
2040 }
2041 }
2042
2043 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
2044 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2045 &sinfo->txrate);
2046 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
2047 }
2048
2049 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
2050 sta_set_rate_info_rx(sta, &sinfo->rxrate);
2051 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
2052 }
2053
2054 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
2055 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2056 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2057
2058 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2059 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2060 tidstats->rx_msdu = sta->rx_stats.msdu[i];
2061 }
2062
2063 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2064 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2065 tidstats->tx_msdu = sta->tx_stats.msdu[i];
2066 }
2067
2068 if (!(tidstats->filled &
2069 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2070 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2071 tidstats->filled |=
2072 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2073 tidstats->tx_msdu_retries =
2074 sta->status_stats.msdu_retries[i];
2075 }
2076
2077 if (!(tidstats->filled &
2078 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2079 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2080 tidstats->filled |=
2081 BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2082 tidstats->tx_msdu_failed =
2083 sta->status_stats.msdu_failed[i];
2084 }
2085 }
2086
2087 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2088 #ifdef CONFIG_MAC80211_MESH
2089 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
2090 BIT(NL80211_STA_INFO_PLID) |
2091 BIT(NL80211_STA_INFO_PLINK_STATE) |
2092 BIT(NL80211_STA_INFO_LOCAL_PM) |
2093 BIT(NL80211_STA_INFO_PEER_PM) |
2094 BIT(NL80211_STA_INFO_NONPEER_PM);
2095
2096 sinfo->llid = sta->mesh->llid;
2097 sinfo->plid = sta->mesh->plid;
2098 sinfo->plink_state = sta->mesh->plink_state;
2099 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2100 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
2101 sinfo->t_offset = sta->mesh->t_offset;
2102 }
2103 sinfo->local_pm = sta->mesh->local_pm;
2104 sinfo->peer_pm = sta->mesh->peer_pm;
2105 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2106 #endif
2107 }
2108
2109 sinfo->bss_param.flags = 0;
2110 if (sdata->vif.bss_conf.use_cts_prot)
2111 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2112 if (sdata->vif.bss_conf.use_short_preamble)
2113 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2114 if (sdata->vif.bss_conf.use_short_slot)
2115 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2116 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2117 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2118
2119 sinfo->sta_flags.set = 0;
2120 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2121 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2122 BIT(NL80211_STA_FLAG_WME) |
2123 BIT(NL80211_STA_FLAG_MFP) |
2124 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2125 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2126 BIT(NL80211_STA_FLAG_TDLS_PEER);
2127 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2128 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2129 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2130 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2131 if (sta->sta.wme)
2132 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2133 if (test_sta_flag(sta, WLAN_STA_MFP))
2134 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2135 if (test_sta_flag(sta, WLAN_STA_AUTH))
2136 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2137 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2138 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2139 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2140 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2141
2142 /* check if the driver has a SW RC implementation */
2143 if (ref && ref->ops->get_expected_throughput)
2144 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2145 else
2146 thr = drv_get_expected_throughput(local, &sta->sta);
2147
2148 if (thr != 0) {
2149 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2150 sinfo->expected_throughput = thr;
2151 }
2152 }
Linux kernel - Deliverables
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