1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7 * Copyright (C) 2018-2019 Intel Corporation
8 */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
20
21 #include <net/codel.h>
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 static const struct rhashtable_params sta_rht_params = {
68 .nelem_hint = 3, /* start small */
69 .automatic_shrinking = true,
70 .head_offset = offsetof(struct sta_info, hash_node),
71 .key_offset = offsetof(struct sta_info, addr),
72 .key_len = ETH_ALEN,
73 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
74 };
75
76 /* Caller must hold local->sta_mtx */
sta_info_hash_del(struct ieee80211_local * local,struct sta_info * sta)77 static int sta_info_hash_del(struct ieee80211_local *local,
78 struct sta_info *sta)
79 {
80 return rhltable_remove(&local->sta_hash, &sta->hash_node,
81 sta_rht_params);
82 }
83
__cleanup_single_sta(struct sta_info * sta)84 static void __cleanup_single_sta(struct sta_info *sta)
85 {
86 int ac, i;
87 struct tid_ampdu_tx *tid_tx;
88 struct ieee80211_sub_if_data *sdata = sta->sdata;
89 struct ieee80211_local *local = sdata->local;
90 struct ps_data *ps;
91
92 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
93 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
94 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
95 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
96 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
97 ps = &sdata->bss->ps;
98 else if (ieee80211_vif_is_mesh(&sdata->vif))
99 ps = &sdata->u.mesh.ps;
100 else
101 return;
102
103 clear_sta_flag(sta, WLAN_STA_PS_STA);
104 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
105 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
106
107 atomic_dec(&ps->num_sta_ps);
108 }
109
110 if (sta->sta.txq[0]) {
111 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
112 struct txq_info *txqi;
113
114 if (!sta->sta.txq[i])
115 continue;
116
117 txqi = to_txq_info(sta->sta.txq[i]);
118
119 ieee80211_txq_purge(local, txqi);
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
cleanup_single_sta(struct sta_info * sta)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
sta_info_hash_lookup(struct ieee80211_local * local,const u8 * addr)159 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
160 const u8 *addr)
161 {
162 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
163 }
164
165 /* protected by RCU */
sta_info_get(struct ieee80211_sub_if_data * sdata,const u8 * addr)166 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
167 const u8 *addr)
168 {
169 struct ieee80211_local *local = sdata->local;
170 struct rhlist_head *tmp;
171 struct sta_info *sta;
172
173 rcu_read_lock();
174 for_each_sta_info(local, addr, sta, tmp) {
175 if (sta->sdata == sdata) {
176 rcu_read_unlock();
177 /* this is safe as the caller must already hold
178 * another rcu read section or the mutex
179 */
180 return sta;
181 }
182 }
183 rcu_read_unlock();
184 return NULL;
185 }
186
187 /*
188 * Get sta info either from the specified interface
189 * or from one of its vlans
190 */
sta_info_get_bss(struct ieee80211_sub_if_data * sdata,const u8 * addr)191 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
192 const u8 *addr)
193 {
194 struct ieee80211_local *local = sdata->local;
195 struct rhlist_head *tmp;
196 struct sta_info *sta;
197
198 rcu_read_lock();
199 for_each_sta_info(local, 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
sta_info_get_by_idx(struct ieee80211_sub_if_data * sdata,int idx)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 */
sta_info_free(struct ieee80211_local * local,struct sta_info * sta)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 free_percpu(sta->pcpu_rx_stats);
258 kfree(sta);
259 }
260
261 /* Caller must hold local->sta_mtx */
sta_info_hash_add(struct ieee80211_local * local,struct sta_info * sta)262 static int sta_info_hash_add(struct ieee80211_local *local,
263 struct sta_info *sta)
264 {
265 return rhltable_insert(&local->sta_hash, &sta->hash_node,
266 sta_rht_params);
267 }
268
sta_deliver_ps_frames(struct work_struct * wk)269 static void sta_deliver_ps_frames(struct work_struct *wk)
270 {
271 struct sta_info *sta;
272
273 sta = container_of(wk, struct sta_info, drv_deliver_wk);
274
275 if (sta->dead)
276 return;
277
278 local_bh_disable();
279 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
280 ieee80211_sta_ps_deliver_wakeup(sta);
281 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
282 ieee80211_sta_ps_deliver_poll_response(sta);
283 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
284 ieee80211_sta_ps_deliver_uapsd(sta);
285 local_bh_enable();
286 }
287
sta_prepare_rate_control(struct ieee80211_local * local,struct sta_info * sta,gfp_t gfp)288 static int sta_prepare_rate_control(struct ieee80211_local *local,
289 struct sta_info *sta, gfp_t gfp)
290 {
291 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
292 return 0;
293
294 sta->rate_ctrl = local->rate_ctrl;
295 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
296 sta, gfp);
297 if (!sta->rate_ctrl_priv)
298 return -ENOMEM;
299
300 return 0;
301 }
302
sta_info_alloc(struct ieee80211_sub_if_data * sdata,const u8 * addr,gfp_t gfp)303 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
304 const u8 *addr, gfp_t gfp)
305 {
306 struct ieee80211_local *local = sdata->local;
307 struct ieee80211_hw *hw = &local->hw;
308 struct sta_info *sta;
309 int i;
310
311 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
312 if (!sta)
313 return NULL;
314
315 if (ieee80211_hw_check(hw, USES_RSS)) {
316 sta->pcpu_rx_stats =
317 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
318 if (!sta->pcpu_rx_stats)
319 goto free;
320 }
321
322 spin_lock_init(&sta->lock);
323 spin_lock_init(&sta->ps_lock);
324 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
325 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
326 mutex_init(&sta->ampdu_mlme.mtx);
327 #ifdef CONFIG_MAC80211_MESH
328 if (ieee80211_vif_is_mesh(&sdata->vif)) {
329 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
330 if (!sta->mesh)
331 goto free;
332 sta->mesh->plink_sta = sta;
333 spin_lock_init(&sta->mesh->plink_lock);
334 if (ieee80211_vif_is_mesh(&sdata->vif) &&
335 !sdata->u.mesh.user_mpm)
336 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
337 0);
338 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
339 }
340 #endif
341
342 memcpy(sta->addr, addr, ETH_ALEN);
343 memcpy(sta->sta.addr, addr, ETH_ALEN);
344 sta->sta.max_rx_aggregation_subframes =
345 local->hw.max_rx_aggregation_subframes;
346
347 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
348 * The Tx path starts to use a key as soon as the key slot ptk_idx
349 * references to is not NULL. To not use the initial Rx-only key
350 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
351 * which always will refer to a NULL key.
352 */
353 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
354 sta->ptk_idx = INVALID_PTK_KEYIDX;
355
356 sta->local = local;
357 sta->sdata = sdata;
358 sta->rx_stats.last_rx = jiffies;
359
360 u64_stats_init(&sta->rx_stats.syncp);
361
362 sta->sta_state = IEEE80211_STA_NONE;
363
364 /* Mark TID as unreserved */
365 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
366
367 sta->last_connected = ktime_get_seconds();
368 ewma_signal_init(&sta->rx_stats_avg.signal);
369 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
370 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
371 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
372
373 if (local->ops->wake_tx_queue) {
374 void *txq_data;
375 int size = sizeof(struct txq_info) +
376 ALIGN(hw->txq_data_size, sizeof(void *));
377
378 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
379 if (!txq_data)
380 goto free;
381
382 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
383 struct txq_info *txq = txq_data + i * size;
384
385 /* might not do anything for the bufferable MMPDU TXQ */
386 ieee80211_txq_init(sdata, sta, txq, i);
387 }
388 }
389
390 if (sta_prepare_rate_control(local, sta, gfp))
391 goto free_txq;
392
393 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
394
395 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
396 skb_queue_head_init(&sta->ps_tx_buf[i]);
397 skb_queue_head_init(&sta->tx_filtered[i]);
398 sta->airtime[i].deficit = sta->airtime_weight;
399 }
400
401 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
402 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
403
404 for (i = 0; i < NUM_NL80211_BANDS; i++) {
405 u32 mandatory = 0;
406 int r;
407
408 if (!hw->wiphy->bands[i])
409 continue;
410
411 switch (i) {
412 case NL80211_BAND_2GHZ:
413 /*
414 * We use both here, even if we cannot really know for
415 * sure the station will support both, but the only use
416 * for this is when we don't know anything yet and send
417 * management frames, and then we'll pick the lowest
418 * possible rate anyway.
419 * If we don't include _G here, we cannot find a rate
420 * in P2P, and thus trigger the WARN_ONCE() in rate.c
421 */
422 mandatory = IEEE80211_RATE_MANDATORY_B |
423 IEEE80211_RATE_MANDATORY_G;
424 break;
425 case NL80211_BAND_5GHZ:
426 mandatory = IEEE80211_RATE_MANDATORY_A;
427 break;
428 case NL80211_BAND_60GHZ:
429 WARN_ON(1);
430 mandatory = 0;
431 break;
432 }
433
434 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
435 struct ieee80211_rate *rate;
436
437 rate = &hw->wiphy->bands[i]->bitrates[r];
438
439 if (!(rate->flags & mandatory))
440 continue;
441 sta->sta.supp_rates[i] |= BIT(r);
442 }
443 }
444
445 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
446 if (sdata->vif.type == NL80211_IFTYPE_AP ||
447 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
448 struct ieee80211_supported_band *sband;
449 u8 smps;
450
451 sband = ieee80211_get_sband(sdata);
452 if (!sband)
453 goto free_txq;
454
455 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
456 IEEE80211_HT_CAP_SM_PS_SHIFT;
457 /*
458 * Assume that hostapd advertises our caps in the beacon and
459 * this is the known_smps_mode for a station that just assciated
460 */
461 switch (smps) {
462 case WLAN_HT_SMPS_CONTROL_DISABLED:
463 sta->known_smps_mode = IEEE80211_SMPS_OFF;
464 break;
465 case WLAN_HT_SMPS_CONTROL_STATIC:
466 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
467 break;
468 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
469 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
470 break;
471 default:
472 WARN_ON(1);
473 }
474 }
475
476 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
477
478 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
479 sta->cparams.target = MS2TIME(20);
480 sta->cparams.interval = MS2TIME(100);
481 sta->cparams.ecn = true;
482
483 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
484
485 return sta;
486
487 free_txq:
488 if (sta->sta.txq[0])
489 kfree(to_txq_info(sta->sta.txq[0]));
490 free:
491 free_percpu(sta->pcpu_rx_stats);
492 #ifdef CONFIG_MAC80211_MESH
493 kfree(sta->mesh);
494 #endif
495 kfree(sta);
496 return NULL;
497 }
498
sta_info_insert_check(struct sta_info * sta)499 static int sta_info_insert_check(struct sta_info *sta)
500 {
501 struct ieee80211_sub_if_data *sdata = sta->sdata;
502
503 /*
504 * Can't be a WARN_ON because it can be triggered through a race:
505 * something inserts a STA (on one CPU) without holding the RTNL
506 * and another CPU turns off the net device.
507 */
508 if (unlikely(!ieee80211_sdata_running(sdata)))
509 return -ENETDOWN;
510
511 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
512 is_multicast_ether_addr(sta->sta.addr)))
513 return -EINVAL;
514
515 /* The RCU read lock is required by rhashtable due to
516 * asynchronous resize/rehash. We also require the mutex
517 * for correctness.
518 */
519 rcu_read_lock();
520 lockdep_assert_held(&sdata->local->sta_mtx);
521 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
522 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
523 rcu_read_unlock();
524 return -ENOTUNIQ;
525 }
526 rcu_read_unlock();
527
528 return 0;
529 }
530
sta_info_insert_drv_state(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sta_info * sta)531 static int sta_info_insert_drv_state(struct ieee80211_local *local,
532 struct ieee80211_sub_if_data *sdata,
533 struct sta_info *sta)
534 {
535 enum ieee80211_sta_state state;
536 int err = 0;
537
538 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
539 err = drv_sta_state(local, sdata, sta, state, state + 1);
540 if (err)
541 break;
542 }
543
544 if (!err) {
545 /*
546 * Drivers using legacy sta_add/sta_remove callbacks only
547 * get uploaded set to true after sta_add is called.
548 */
549 if (!local->ops->sta_add)
550 sta->uploaded = true;
551 return 0;
552 }
553
554 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
555 sdata_info(sdata,
556 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
557 sta->sta.addr, state + 1, err);
558 err = 0;
559 }
560
561 /* unwind on error */
562 for (; state > IEEE80211_STA_NOTEXIST; state--)
563 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
564
565 return err;
566 }
567
568 static void
ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data * sdata)569 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
570 {
571 struct ieee80211_local *local = sdata->local;
572 bool allow_p2p_go_ps = sdata->vif.p2p;
573 struct sta_info *sta;
574
575 rcu_read_lock();
576 list_for_each_entry_rcu(sta, &local->sta_list, list) {
577 if (sdata != sta->sdata ||
578 !test_sta_flag(sta, WLAN_STA_ASSOC))
579 continue;
580 if (!sta->sta.support_p2p_ps) {
581 allow_p2p_go_ps = false;
582 break;
583 }
584 }
585 rcu_read_unlock();
586
587 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
588 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
589 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
590 }
591 }
592
593 /*
594 * should be called with sta_mtx locked
595 * this function replaces the mutex lock
596 * with a RCU lock
597 */
sta_info_insert_finish(struct sta_info * sta)598 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
599 {
600 struct ieee80211_local *local = sta->local;
601 struct ieee80211_sub_if_data *sdata = sta->sdata;
602 struct station_info *sinfo = NULL;
603 int err = 0;
604
605 lockdep_assert_held(&local->sta_mtx);
606
607 /* check if STA exists already */
608 if (sta_info_get_bss(sdata, sta->sta.addr)) {
609 err = -EEXIST;
610 goto out_err;
611 }
612
613 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
614 if (!sinfo) {
615 err = -ENOMEM;
616 goto out_err;
617 }
618
619 local->num_sta++;
620 local->sta_generation++;
621 smp_mb();
622
623 /* simplify things and don't accept BA sessions yet */
624 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
625
626 /* make the station visible */
627 err = sta_info_hash_add(local, sta);
628 if (err)
629 goto out_drop_sta;
630
631 list_add_tail_rcu(&sta->list, &local->sta_list);
632
633 /* notify driver */
634 err = sta_info_insert_drv_state(local, sdata, sta);
635 if (err)
636 goto out_remove;
637
638 set_sta_flag(sta, WLAN_STA_INSERTED);
639
640 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
641 ieee80211_recalc_min_chandef(sta->sdata);
642 if (!sta->sta.support_p2p_ps)
643 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
644 }
645
646 /* accept BA sessions now */
647 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
648
649 ieee80211_sta_debugfs_add(sta);
650 rate_control_add_sta_debugfs(sta);
651
652 sinfo->generation = local->sta_generation;
653 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
654 kfree(sinfo);
655
656 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
657
658 /* move reference to rcu-protected */
659 rcu_read_lock();
660 mutex_unlock(&local->sta_mtx);
661
662 if (ieee80211_vif_is_mesh(&sdata->vif))
663 mesh_accept_plinks_update(sdata);
664
665 return 0;
666 out_remove:
667 sta_info_hash_del(local, sta);
668 list_del_rcu(&sta->list);
669 out_drop_sta:
670 local->num_sta--;
671 synchronize_net();
672 __cleanup_single_sta(sta);
673 out_err:
674 mutex_unlock(&local->sta_mtx);
675 kfree(sinfo);
676 rcu_read_lock();
677 return err;
678 }
679
sta_info_insert_rcu(struct sta_info * sta)680 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
681 {
682 struct ieee80211_local *local = sta->local;
683 int err;
684
685 might_sleep();
686
687 mutex_lock(&local->sta_mtx);
688
689 err = sta_info_insert_check(sta);
690 if (err) {
691 mutex_unlock(&local->sta_mtx);
692 rcu_read_lock();
693 goto out_free;
694 }
695
696 err = sta_info_insert_finish(sta);
697 if (err)
698 goto out_free;
699
700 return 0;
701 out_free:
702 sta_info_free(local, sta);
703 return err;
704 }
705
sta_info_insert(struct sta_info * sta)706 int sta_info_insert(struct sta_info *sta)
707 {
708 int err = sta_info_insert_rcu(sta);
709
710 rcu_read_unlock();
711
712 return err;
713 }
714
__bss_tim_set(u8 * tim,u16 id)715 static inline void __bss_tim_set(u8 *tim, u16 id)
716 {
717 /*
718 * This format has been mandated by the IEEE specifications,
719 * so this line may not be changed to use the __set_bit() format.
720 */
721 tim[id / 8] |= (1 << (id % 8));
722 }
723
__bss_tim_clear(u8 * tim,u16 id)724 static inline void __bss_tim_clear(u8 *tim, u16 id)
725 {
726 /*
727 * This format has been mandated by the IEEE specifications,
728 * so this line may not be changed to use the __clear_bit() format.
729 */
730 tim[id / 8] &= ~(1 << (id % 8));
731 }
732
__bss_tim_get(u8 * tim,u16 id)733 static inline bool __bss_tim_get(u8 *tim, u16 id)
734 {
735 /*
736 * This format has been mandated by the IEEE specifications,
737 * so this line may not be changed to use the test_bit() format.
738 */
739 return tim[id / 8] & (1 << (id % 8));
740 }
741
ieee80211_tids_for_ac(int ac)742 static unsigned long ieee80211_tids_for_ac(int ac)
743 {
744 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
745 switch (ac) {
746 case IEEE80211_AC_VO:
747 return BIT(6) | BIT(7);
748 case IEEE80211_AC_VI:
749 return BIT(4) | BIT(5);
750 case IEEE80211_AC_BE:
751 return BIT(0) | BIT(3);
752 case IEEE80211_AC_BK:
753 return BIT(1) | BIT(2);
754 default:
755 WARN_ON(1);
756 return 0;
757 }
758 }
759
__sta_info_recalc_tim(struct sta_info * sta,bool ignore_pending)760 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
761 {
762 struct ieee80211_local *local = sta->local;
763 struct ps_data *ps;
764 bool indicate_tim = false;
765 u8 ignore_for_tim = sta->sta.uapsd_queues;
766 int ac;
767 u16 id = sta->sta.aid;
768
769 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
770 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
771 if (WARN_ON_ONCE(!sta->sdata->bss))
772 return;
773
774 ps = &sta->sdata->bss->ps;
775 #ifdef CONFIG_MAC80211_MESH
776 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
777 ps = &sta->sdata->u.mesh.ps;
778 #endif
779 } else {
780 return;
781 }
782
783 /* No need to do anything if the driver does all */
784 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
785 return;
786
787 if (sta->dead)
788 goto done;
789
790 /*
791 * If all ACs are delivery-enabled then we should build
792 * the TIM bit for all ACs anyway; if only some are then
793 * we ignore those and build the TIM bit using only the
794 * non-enabled ones.
795 */
796 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
797 ignore_for_tim = 0;
798
799 if (ignore_pending)
800 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
801
802 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
803 unsigned long tids;
804
805 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
806 continue;
807
808 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
809 !skb_queue_empty(&sta->ps_tx_buf[ac]);
810 if (indicate_tim)
811 break;
812
813 tids = ieee80211_tids_for_ac(ac);
814
815 indicate_tim |=
816 sta->driver_buffered_tids & tids;
817 indicate_tim |=
818 sta->txq_buffered_tids & tids;
819 }
820
821 done:
822 spin_lock_bh(&local->tim_lock);
823
824 if (indicate_tim == __bss_tim_get(ps->tim, id))
825 goto out_unlock;
826
827 if (indicate_tim)
828 __bss_tim_set(ps->tim, id);
829 else
830 __bss_tim_clear(ps->tim, id);
831
832 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
833 local->tim_in_locked_section = true;
834 drv_set_tim(local, &sta->sta, indicate_tim);
835 local->tim_in_locked_section = false;
836 }
837
838 out_unlock:
839 spin_unlock_bh(&local->tim_lock);
840 }
841
sta_info_recalc_tim(struct sta_info * sta)842 void sta_info_recalc_tim(struct sta_info *sta)
843 {
844 __sta_info_recalc_tim(sta, false);
845 }
846
sta_info_buffer_expired(struct sta_info * sta,struct sk_buff * skb)847 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
848 {
849 struct ieee80211_tx_info *info;
850 int timeout;
851
852 if (!skb)
853 return false;
854
855 info = IEEE80211_SKB_CB(skb);
856
857 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
858 timeout = (sta->listen_interval *
859 sta->sdata->vif.bss_conf.beacon_int *
860 32 / 15625) * HZ;
861 if (timeout < STA_TX_BUFFER_EXPIRE)
862 timeout = STA_TX_BUFFER_EXPIRE;
863 return time_after(jiffies, info->control.jiffies + timeout);
864 }
865
866
sta_info_cleanup_expire_buffered_ac(struct ieee80211_local * local,struct sta_info * sta,int ac)867 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
868 struct sta_info *sta, int ac)
869 {
870 unsigned long flags;
871 struct sk_buff *skb;
872
873 /*
874 * First check for frames that should expire on the filtered
875 * queue. Frames here were rejected by the driver and are on
876 * a separate queue to avoid reordering with normal PS-buffered
877 * frames. They also aren't accounted for right now in the
878 * total_ps_buffered counter.
879 */
880 for (;;) {
881 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
882 skb = skb_peek(&sta->tx_filtered[ac]);
883 if (sta_info_buffer_expired(sta, skb))
884 skb = __skb_dequeue(&sta->tx_filtered[ac]);
885 else
886 skb = NULL;
887 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
888
889 /*
890 * Frames are queued in order, so if this one
891 * hasn't expired yet we can stop testing. If
892 * we actually reached the end of the queue we
893 * also need to stop, of course.
894 */
895 if (!skb)
896 break;
897 ieee80211_free_txskb(&local->hw, skb);
898 }
899
900 /*
901 * Now also check the normal PS-buffered queue, this will
902 * only find something if the filtered queue was emptied
903 * since the filtered frames are all before the normal PS
904 * buffered frames.
905 */
906 for (;;) {
907 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
908 skb = skb_peek(&sta->ps_tx_buf[ac]);
909 if (sta_info_buffer_expired(sta, skb))
910 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
911 else
912 skb = NULL;
913 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
914
915 /*
916 * frames are queued in order, so if this one
917 * hasn't expired yet (or we reached the end of
918 * the queue) we can stop testing
919 */
920 if (!skb)
921 break;
922
923 local->total_ps_buffered--;
924 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
925 sta->sta.addr);
926 ieee80211_free_txskb(&local->hw, skb);
927 }
928
929 /*
930 * Finally, recalculate the TIM bit for this station -- it might
931 * now be clear because the station was too slow to retrieve its
932 * frames.
933 */
934 sta_info_recalc_tim(sta);
935
936 /*
937 * Return whether there are any frames still buffered, this is
938 * used to check whether the cleanup timer still needs to run,
939 * if there are no frames we don't need to rearm the timer.
940 */
941 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
942 skb_queue_empty(&sta->tx_filtered[ac]));
943 }
944
sta_info_cleanup_expire_buffered(struct ieee80211_local * local,struct sta_info * sta)945 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
946 struct sta_info *sta)
947 {
948 bool have_buffered = false;
949 int ac;
950
951 /* This is only necessary for stations on BSS/MBSS interfaces */
952 if (!sta->sdata->bss &&
953 !ieee80211_vif_is_mesh(&sta->sdata->vif))
954 return false;
955
956 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
957 have_buffered |=
958 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
959
960 return have_buffered;
961 }
962
__sta_info_destroy_part1(struct sta_info * sta)963 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
964 {
965 struct ieee80211_local *local;
966 struct ieee80211_sub_if_data *sdata;
967 int ret;
968
969 might_sleep();
970
971 if (!sta)
972 return -ENOENT;
973
974 local = sta->local;
975 sdata = sta->sdata;
976
977 lockdep_assert_held(&local->sta_mtx);
978
979 /*
980 * Before removing the station from the driver and
981 * rate control, it might still start new aggregation
982 * sessions -- block that to make sure the tear-down
983 * will be sufficient.
984 */
985 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
986 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
987
988 /*
989 * Before removing the station from the driver there might be pending
990 * rx frames on RSS queues sent prior to the disassociation - wait for
991 * all such frames to be processed.
992 */
993 drv_sync_rx_queues(local, sta);
994
995 ret = sta_info_hash_del(local, sta);
996 if (WARN_ON(ret))
997 return ret;
998
999 /*
1000 * for TDLS peers, make sure to return to the base channel before
1001 * removal.
1002 */
1003 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
1004 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
1005 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
1006 }
1007
1008 list_del_rcu(&sta->list);
1009 sta->removed = true;
1010
1011 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
1012
1013 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1014 rcu_access_pointer(sdata->u.vlan.sta) == sta)
1015 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1016
1017 return 0;
1018 }
1019
__sta_info_destroy_part2(struct sta_info * sta)1020 static void __sta_info_destroy_part2(struct sta_info *sta)
1021 {
1022 struct ieee80211_local *local = sta->local;
1023 struct ieee80211_sub_if_data *sdata = sta->sdata;
1024 struct station_info *sinfo;
1025 int ret;
1026
1027 /*
1028 * NOTE: This assumes at least synchronize_net() was done
1029 * after _part1 and before _part2!
1030 */
1031
1032 might_sleep();
1033 lockdep_assert_held(&local->sta_mtx);
1034
1035 /* now keys can no longer be reached */
1036 ieee80211_free_sta_keys(local, sta);
1037
1038 /* disable TIM bit - last chance to tell driver */
1039 __sta_info_recalc_tim(sta, true);
1040
1041 sta->dead = true;
1042
1043 local->num_sta--;
1044 local->sta_generation++;
1045
1046 while (sta->sta_state > IEEE80211_STA_NONE) {
1047 ret = sta_info_move_state(sta, sta->sta_state - 1);
1048 if (ret) {
1049 WARN_ON_ONCE(1);
1050 break;
1051 }
1052 }
1053
1054 if (sta->uploaded) {
1055 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1056 IEEE80211_STA_NOTEXIST);
1057 WARN_ON_ONCE(ret != 0);
1058 }
1059
1060 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1061
1062 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1063 if (sinfo)
1064 sta_set_sinfo(sta, sinfo, true);
1065 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1066 kfree(sinfo);
1067
1068 ieee80211_sta_debugfs_remove(sta);
1069
1070 cleanup_single_sta(sta);
1071 }
1072
__sta_info_destroy(struct sta_info * sta)1073 int __must_check __sta_info_destroy(struct sta_info *sta)
1074 {
1075 int err = __sta_info_destroy_part1(sta);
1076
1077 if (err)
1078 return err;
1079
1080 synchronize_net();
1081
1082 __sta_info_destroy_part2(sta);
1083
1084 return 0;
1085 }
1086
sta_info_destroy_addr(struct ieee80211_sub_if_data * sdata,const u8 * addr)1087 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1088 {
1089 struct sta_info *sta;
1090 int ret;
1091
1092 mutex_lock(&sdata->local->sta_mtx);
1093 sta = sta_info_get(sdata, addr);
1094 ret = __sta_info_destroy(sta);
1095 mutex_unlock(&sdata->local->sta_mtx);
1096
1097 return ret;
1098 }
1099
sta_info_destroy_addr_bss(struct ieee80211_sub_if_data * sdata,const u8 * addr)1100 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1101 const u8 *addr)
1102 {
1103 struct sta_info *sta;
1104 int ret;
1105
1106 mutex_lock(&sdata->local->sta_mtx);
1107 sta = sta_info_get_bss(sdata, addr);
1108 ret = __sta_info_destroy(sta);
1109 mutex_unlock(&sdata->local->sta_mtx);
1110
1111 return ret;
1112 }
1113
sta_info_cleanup(struct timer_list * t)1114 static void sta_info_cleanup(struct timer_list *t)
1115 {
1116 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1117 struct sta_info *sta;
1118 bool timer_needed = false;
1119
1120 rcu_read_lock();
1121 list_for_each_entry_rcu(sta, &local->sta_list, list)
1122 if (sta_info_cleanup_expire_buffered(local, sta))
1123 timer_needed = true;
1124 rcu_read_unlock();
1125
1126 if (local->quiescing)
1127 return;
1128
1129 if (!timer_needed)
1130 return;
1131
1132 mod_timer(&local->sta_cleanup,
1133 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1134 }
1135
sta_info_init(struct ieee80211_local * local)1136 int sta_info_init(struct ieee80211_local *local)
1137 {
1138 int err;
1139
1140 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1141 if (err)
1142 return err;
1143
1144 spin_lock_init(&local->tim_lock);
1145 mutex_init(&local->sta_mtx);
1146 INIT_LIST_HEAD(&local->sta_list);
1147
1148 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1149 return 0;
1150 }
1151
sta_info_stop(struct ieee80211_local * local)1152 void sta_info_stop(struct ieee80211_local *local)
1153 {
1154 del_timer_sync(&local->sta_cleanup);
1155 rhltable_destroy(&local->sta_hash);
1156 }
1157
1158
__sta_info_flush(struct ieee80211_sub_if_data * sdata,bool vlans)1159 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1160 {
1161 struct ieee80211_local *local = sdata->local;
1162 struct sta_info *sta, *tmp;
1163 LIST_HEAD(free_list);
1164 int ret = 0;
1165
1166 might_sleep();
1167
1168 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1169 WARN_ON(vlans && !sdata->bss);
1170
1171 mutex_lock(&local->sta_mtx);
1172 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1173 if (sdata == sta->sdata ||
1174 (vlans && sdata->bss == sta->sdata->bss)) {
1175 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1176 list_add(&sta->free_list, &free_list);
1177 ret++;
1178 }
1179 }
1180
1181 if (!list_empty(&free_list)) {
1182 synchronize_net();
1183 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1184 __sta_info_destroy_part2(sta);
1185 }
1186 mutex_unlock(&local->sta_mtx);
1187
1188 return ret;
1189 }
1190
ieee80211_sta_expire(struct ieee80211_sub_if_data * sdata,unsigned long exp_time)1191 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1192 unsigned long exp_time)
1193 {
1194 struct ieee80211_local *local = sdata->local;
1195 struct sta_info *sta, *tmp;
1196
1197 mutex_lock(&local->sta_mtx);
1198
1199 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1200 unsigned long last_active = ieee80211_sta_last_active(sta);
1201
1202 if (sdata != sta->sdata)
1203 continue;
1204
1205 if (time_is_before_jiffies(last_active + exp_time)) {
1206 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1207 sta->sta.addr);
1208
1209 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1210 test_sta_flag(sta, WLAN_STA_PS_STA))
1211 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1212
1213 WARN_ON(__sta_info_destroy(sta));
1214 }
1215 }
1216
1217 mutex_unlock(&local->sta_mtx);
1218 }
1219
ieee80211_find_sta_by_ifaddr(struct ieee80211_hw * hw,const u8 * addr,const u8 * localaddr)1220 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1221 const u8 *addr,
1222 const u8 *localaddr)
1223 {
1224 struct ieee80211_local *local = hw_to_local(hw);
1225 struct rhlist_head *tmp;
1226 struct sta_info *sta;
1227
1228 /*
1229 * Just return a random station if localaddr is NULL
1230 * ... first in list.
1231 */
1232 for_each_sta_info(local, addr, sta, tmp) {
1233 if (localaddr &&
1234 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1235 continue;
1236 if (!sta->uploaded)
1237 return NULL;
1238 return &sta->sta;
1239 }
1240
1241 return NULL;
1242 }
1243 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1244
ieee80211_find_sta(struct ieee80211_vif * vif,const u8 * addr)1245 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1246 const u8 *addr)
1247 {
1248 struct sta_info *sta;
1249
1250 if (!vif)
1251 return NULL;
1252
1253 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1254 if (!sta)
1255 return NULL;
1256
1257 if (!sta->uploaded)
1258 return NULL;
1259
1260 return &sta->sta;
1261 }
1262 EXPORT_SYMBOL(ieee80211_find_sta);
1263
1264 /* powersave support code */
ieee80211_sta_ps_deliver_wakeup(struct sta_info * sta)1265 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1266 {
1267 struct ieee80211_sub_if_data *sdata = sta->sdata;
1268 struct ieee80211_local *local = sdata->local;
1269 struct sk_buff_head pending;
1270 int filtered = 0, buffered = 0, ac, i;
1271 unsigned long flags;
1272 struct ps_data *ps;
1273
1274 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1275 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1276 u.ap);
1277
1278 if (sdata->vif.type == NL80211_IFTYPE_AP)
1279 ps = &sdata->bss->ps;
1280 else if (ieee80211_vif_is_mesh(&sdata->vif))
1281 ps = &sdata->u.mesh.ps;
1282 else
1283 return;
1284
1285 clear_sta_flag(sta, WLAN_STA_SP);
1286
1287 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1288 sta->driver_buffered_tids = 0;
1289 sta->txq_buffered_tids = 0;
1290
1291 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1292 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1293
1294 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1295 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1296 continue;
1297
1298 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
1299 }
1300
1301 skb_queue_head_init(&pending);
1302
1303 /* sync with ieee80211_tx_h_unicast_ps_buf */
1304 spin_lock(&sta->ps_lock);
1305 /* Send all buffered frames to the station */
1306 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1307 int count = skb_queue_len(&pending), tmp;
1308
1309 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1310 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1311 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1312 tmp = skb_queue_len(&pending);
1313 filtered += tmp - count;
1314 count = tmp;
1315
1316 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1317 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1318 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1319 tmp = skb_queue_len(&pending);
1320 buffered += tmp - count;
1321 }
1322
1323 ieee80211_add_pending_skbs(local, &pending);
1324
1325 /* now we're no longer in the deliver code */
1326 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1327
1328 /* The station might have polled and then woken up before we responded,
1329 * so clear these flags now to avoid them sticking around.
1330 */
1331 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1332 clear_sta_flag(sta, WLAN_STA_UAPSD);
1333 spin_unlock(&sta->ps_lock);
1334
1335 atomic_dec(&ps->num_sta_ps);
1336
1337 /* This station just woke up and isn't aware of our SMPS state */
1338 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1339 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1340 sdata->smps_mode) &&
1341 sta->known_smps_mode != sdata->bss->req_smps &&
1342 sta_info_tx_streams(sta) != 1) {
1343 ht_dbg(sdata,
1344 "%pM just woke up and MIMO capable - update SMPS\n",
1345 sta->sta.addr);
1346 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1347 sta->sta.addr,
1348 sdata->vif.bss_conf.bssid);
1349 }
1350
1351 local->total_ps_buffered -= buffered;
1352
1353 sta_info_recalc_tim(sta);
1354
1355 ps_dbg(sdata,
1356 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1357 sta->sta.addr, sta->sta.aid, filtered, buffered);
1358
1359 ieee80211_check_fast_xmit(sta);
1360 }
1361
ieee80211_send_null_response(struct sta_info * sta,int tid,enum ieee80211_frame_release_type reason,bool call_driver,bool more_data)1362 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1363 enum ieee80211_frame_release_type reason,
1364 bool call_driver, bool more_data)
1365 {
1366 struct ieee80211_sub_if_data *sdata = sta->sdata;
1367 struct ieee80211_local *local = sdata->local;
1368 struct ieee80211_qos_hdr *nullfunc;
1369 struct sk_buff *skb;
1370 int size = sizeof(*nullfunc);
1371 __le16 fc;
1372 bool qos = sta->sta.wme;
1373 struct ieee80211_tx_info *info;
1374 struct ieee80211_chanctx_conf *chanctx_conf;
1375
1376 /* Don't send NDPs when STA is connected HE */
1377 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1378 !(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1379 return;
1380
1381 if (qos) {
1382 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1383 IEEE80211_STYPE_QOS_NULLFUNC |
1384 IEEE80211_FCTL_FROMDS);
1385 } else {
1386 size -= 2;
1387 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1388 IEEE80211_STYPE_NULLFUNC |
1389 IEEE80211_FCTL_FROMDS);
1390 }
1391
1392 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1393 if (!skb)
1394 return;
1395
1396 skb_reserve(skb, local->hw.extra_tx_headroom);
1397
1398 nullfunc = skb_put(skb, size);
1399 nullfunc->frame_control = fc;
1400 nullfunc->duration_id = 0;
1401 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1402 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1403 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1404 nullfunc->seq_ctrl = 0;
1405
1406 skb->priority = tid;
1407 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1408 if (qos) {
1409 nullfunc->qos_ctrl = cpu_to_le16(tid);
1410
1411 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1412 nullfunc->qos_ctrl |=
1413 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1414 if (more_data)
1415 nullfunc->frame_control |=
1416 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1417 }
1418 }
1419
1420 info = IEEE80211_SKB_CB(skb);
1421
1422 /*
1423 * Tell TX path to send this frame even though the
1424 * STA may still remain is PS mode after this frame
1425 * exchange. Also set EOSP to indicate this packet
1426 * ends the poll/service period.
1427 */
1428 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1429 IEEE80211_TX_STATUS_EOSP |
1430 IEEE80211_TX_CTL_REQ_TX_STATUS;
1431
1432 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1433
1434 if (call_driver)
1435 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1436 reason, false);
1437
1438 skb->dev = sdata->dev;
1439
1440 rcu_read_lock();
1441 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1442 if (WARN_ON(!chanctx_conf)) {
1443 rcu_read_unlock();
1444 kfree_skb(skb);
1445 return;
1446 }
1447
1448 info->band = chanctx_conf->def.chan->band;
1449 ieee80211_xmit(sdata, sta, skb, 0);
1450 rcu_read_unlock();
1451 }
1452
find_highest_prio_tid(unsigned long tids)1453 static int find_highest_prio_tid(unsigned long tids)
1454 {
1455 /* lower 3 TIDs aren't ordered perfectly */
1456 if (tids & 0xF8)
1457 return fls(tids) - 1;
1458 /* TID 0 is BE just like TID 3 */
1459 if (tids & BIT(0))
1460 return 0;
1461 return fls(tids) - 1;
1462 }
1463
1464 /* Indicates if the MORE_DATA bit should be set in the last
1465 * frame obtained by ieee80211_sta_ps_get_frames.
1466 * Note that driver_release_tids is relevant only if
1467 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1468 */
1469 static bool
ieee80211_sta_ps_more_data(struct sta_info * sta,u8 ignored_acs,enum ieee80211_frame_release_type reason,unsigned long driver_release_tids)1470 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1471 enum ieee80211_frame_release_type reason,
1472 unsigned long driver_release_tids)
1473 {
1474 int ac;
1475
1476 /* If the driver has data on more than one TID then
1477 * certainly there's more data if we release just a
1478 * single frame now (from a single TID). This will
1479 * only happen for PS-Poll.
1480 */
1481 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1482 hweight16(driver_release_tids) > 1)
1483 return true;
1484
1485 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1486 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1487 continue;
1488
1489 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1490 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1491 return true;
1492 }
1493
1494 return false;
1495 }
1496
1497 static void
ieee80211_sta_ps_get_frames(struct sta_info * sta,int n_frames,u8 ignored_acs,enum ieee80211_frame_release_type reason,struct sk_buff_head * frames,unsigned long * driver_release_tids)1498 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1499 enum ieee80211_frame_release_type reason,
1500 struct sk_buff_head *frames,
1501 unsigned long *driver_release_tids)
1502 {
1503 struct ieee80211_sub_if_data *sdata = sta->sdata;
1504 struct ieee80211_local *local = sdata->local;
1505 int ac;
1506
1507 /* Get response frame(s) and more data bit for the last one. */
1508 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1509 unsigned long tids;
1510
1511 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1512 continue;
1513
1514 tids = ieee80211_tids_for_ac(ac);
1515
1516 /* if we already have frames from software, then we can't also
1517 * release from hardware queues
1518 */
1519 if (skb_queue_empty(frames)) {
1520 *driver_release_tids |=
1521 sta->driver_buffered_tids & tids;
1522 *driver_release_tids |= sta->txq_buffered_tids & tids;
1523 }
1524
1525 if (!*driver_release_tids) {
1526 struct sk_buff *skb;
1527
1528 while (n_frames > 0) {
1529 skb = skb_dequeue(&sta->tx_filtered[ac]);
1530 if (!skb) {
1531 skb = skb_dequeue(
1532 &sta->ps_tx_buf[ac]);
1533 if (skb)
1534 local->total_ps_buffered--;
1535 }
1536 if (!skb)
1537 break;
1538 n_frames--;
1539 __skb_queue_tail(frames, skb);
1540 }
1541 }
1542
1543 /* If we have more frames buffered on this AC, then abort the
1544 * loop since we can't send more data from other ACs before
1545 * the buffered frames from this.
1546 */
1547 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1548 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1549 break;
1550 }
1551 }
1552
1553 static void
ieee80211_sta_ps_deliver_response(struct sta_info * sta,int n_frames,u8 ignored_acs,enum ieee80211_frame_release_type reason)1554 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1555 int n_frames, u8 ignored_acs,
1556 enum ieee80211_frame_release_type reason)
1557 {
1558 struct ieee80211_sub_if_data *sdata = sta->sdata;
1559 struct ieee80211_local *local = sdata->local;
1560 unsigned long driver_release_tids = 0;
1561 struct sk_buff_head frames;
1562 bool more_data;
1563
1564 /* Service or PS-Poll period starts */
1565 set_sta_flag(sta, WLAN_STA_SP);
1566
1567 __skb_queue_head_init(&frames);
1568
1569 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1570 &frames, &driver_release_tids);
1571
1572 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1573
1574 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1575 driver_release_tids =
1576 BIT(find_highest_prio_tid(driver_release_tids));
1577
1578 if (skb_queue_empty(&frames) && !driver_release_tids) {
1579 int tid, ac;
1580
1581 /*
1582 * For PS-Poll, this can only happen due to a race condition
1583 * when we set the TIM bit and the station notices it, but
1584 * before it can poll for the frame we expire it.
1585 *
1586 * For uAPSD, this is said in the standard (11.2.1.5 h):
1587 * At each unscheduled SP for a non-AP STA, the AP shall
1588 * attempt to transmit at least one MSDU or MMPDU, but no
1589 * more than the value specified in the Max SP Length field
1590 * in the QoS Capability element from delivery-enabled ACs,
1591 * that are destined for the non-AP STA.
1592 *
1593 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1594 */
1595
1596 /* This will evaluate to 1, 3, 5 or 7. */
1597 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1598 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1599 break;
1600 tid = 7 - 2 * ac;
1601
1602 ieee80211_send_null_response(sta, tid, reason, true, false);
1603 } else if (!driver_release_tids) {
1604 struct sk_buff_head pending;
1605 struct sk_buff *skb;
1606 int num = 0;
1607 u16 tids = 0;
1608 bool need_null = false;
1609
1610 skb_queue_head_init(&pending);
1611
1612 while ((skb = __skb_dequeue(&frames))) {
1613 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1614 struct ieee80211_hdr *hdr = (void *) skb->data;
1615 u8 *qoshdr = NULL;
1616
1617 num++;
1618
1619 /*
1620 * Tell TX path to send this frame even though the
1621 * STA may still remain is PS mode after this frame
1622 * exchange.
1623 */
1624 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1625 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1626
1627 /*
1628 * Use MoreData flag to indicate whether there are
1629 * more buffered frames for this STA
1630 */
1631 if (more_data || !skb_queue_empty(&frames))
1632 hdr->frame_control |=
1633 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1634 else
1635 hdr->frame_control &=
1636 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1637
1638 if (ieee80211_is_data_qos(hdr->frame_control) ||
1639 ieee80211_is_qos_nullfunc(hdr->frame_control))
1640 qoshdr = ieee80211_get_qos_ctl(hdr);
1641
1642 tids |= BIT(skb->priority);
1643
1644 __skb_queue_tail(&pending, skb);
1645
1646 /* end service period after last frame or add one */
1647 if (!skb_queue_empty(&frames))
1648 continue;
1649
1650 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1651 /* for PS-Poll, there's only one frame */
1652 info->flags |= IEEE80211_TX_STATUS_EOSP |
1653 IEEE80211_TX_CTL_REQ_TX_STATUS;
1654 break;
1655 }
1656
1657 /* For uAPSD, things are a bit more complicated. If the
1658 * last frame has a QoS header (i.e. is a QoS-data or
1659 * QoS-nulldata frame) then just set the EOSP bit there
1660 * and be done.
1661 * If the frame doesn't have a QoS header (which means
1662 * it should be a bufferable MMPDU) then we can't set
1663 * the EOSP bit in the QoS header; add a QoS-nulldata
1664 * frame to the list to send it after the MMPDU.
1665 *
1666 * Note that this code is only in the mac80211-release
1667 * code path, we assume that the driver will not buffer
1668 * anything but QoS-data frames, or if it does, will
1669 * create the QoS-nulldata frame by itself if needed.
1670 *
1671 * Cf. 802.11-2012 10.2.1.10 (c).
1672 */
1673 if (qoshdr) {
1674 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1675
1676 info->flags |= IEEE80211_TX_STATUS_EOSP |
1677 IEEE80211_TX_CTL_REQ_TX_STATUS;
1678 } else {
1679 /* The standard isn't completely clear on this
1680 * as it says the more-data bit should be set
1681 * if there are more BUs. The QoS-Null frame
1682 * we're about to send isn't buffered yet, we
1683 * only create it below, but let's pretend it
1684 * was buffered just in case some clients only
1685 * expect more-data=0 when eosp=1.
1686 */
1687 hdr->frame_control |=
1688 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1689 need_null = true;
1690 num++;
1691 }
1692 break;
1693 }
1694
1695 drv_allow_buffered_frames(local, sta, tids, num,
1696 reason, more_data);
1697
1698 ieee80211_add_pending_skbs(local, &pending);
1699
1700 if (need_null)
1701 ieee80211_send_null_response(
1702 sta, find_highest_prio_tid(tids),
1703 reason, false, false);
1704
1705 sta_info_recalc_tim(sta);
1706 } else {
1707 int tid;
1708
1709 /*
1710 * We need to release a frame that is buffered somewhere in the
1711 * driver ... it'll have to handle that.
1712 * Note that the driver also has to check the number of frames
1713 * on the TIDs we're releasing from - if there are more than
1714 * n_frames it has to set the more-data bit (if we didn't ask
1715 * it to set it anyway due to other buffered frames); if there
1716 * are fewer than n_frames it has to make sure to adjust that
1717 * to allow the service period to end properly.
1718 */
1719 drv_release_buffered_frames(local, sta, driver_release_tids,
1720 n_frames, reason, more_data);
1721
1722 /*
1723 * Note that we don't recalculate the TIM bit here as it would
1724 * most likely have no effect at all unless the driver told us
1725 * that the TID(s) became empty before returning here from the
1726 * release function.
1727 * Either way, however, when the driver tells us that the TID(s)
1728 * became empty or we find that a txq became empty, we'll do the
1729 * TIM recalculation.
1730 */
1731
1732 if (!sta->sta.txq[0])
1733 return;
1734
1735 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1736 if (!sta->sta.txq[tid] ||
1737 !(driver_release_tids & BIT(tid)) ||
1738 txq_has_queue(sta->sta.txq[tid]))
1739 continue;
1740
1741 sta_info_recalc_tim(sta);
1742 break;
1743 }
1744 }
1745 }
1746
ieee80211_sta_ps_deliver_poll_response(struct sta_info * sta)1747 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1748 {
1749 u8 ignore_for_response = sta->sta.uapsd_queues;
1750
1751 /*
1752 * If all ACs are delivery-enabled then we should reply
1753 * from any of them, if only some are enabled we reply
1754 * only from the non-enabled ones.
1755 */
1756 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1757 ignore_for_response = 0;
1758
1759 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1760 IEEE80211_FRAME_RELEASE_PSPOLL);
1761 }
1762
ieee80211_sta_ps_deliver_uapsd(struct sta_info * sta)1763 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1764 {
1765 int n_frames = sta->sta.max_sp;
1766 u8 delivery_enabled = sta->sta.uapsd_queues;
1767
1768 /*
1769 * If we ever grow support for TSPEC this might happen if
1770 * the TSPEC update from hostapd comes in between a trigger
1771 * frame setting WLAN_STA_UAPSD in the RX path and this
1772 * actually getting called.
1773 */
1774 if (!delivery_enabled)
1775 return;
1776
1777 switch (sta->sta.max_sp) {
1778 case 1:
1779 n_frames = 2;
1780 break;
1781 case 2:
1782 n_frames = 4;
1783 break;
1784 case 3:
1785 n_frames = 6;
1786 break;
1787 case 0:
1788 /* XXX: what is a good value? */
1789 n_frames = 128;
1790 break;
1791 }
1792
1793 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1794 IEEE80211_FRAME_RELEASE_UAPSD);
1795 }
1796
ieee80211_sta_block_awake(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,bool block)1797 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1798 struct ieee80211_sta *pubsta, bool block)
1799 {
1800 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1801
1802 trace_api_sta_block_awake(sta->local, pubsta, block);
1803
1804 if (block) {
1805 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1806 ieee80211_clear_fast_xmit(sta);
1807 return;
1808 }
1809
1810 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1811 return;
1812
1813 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1814 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1815 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1816 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1817 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1818 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1819 /* must be asleep in this case */
1820 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1821 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1822 } else {
1823 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1824 ieee80211_check_fast_xmit(sta);
1825 }
1826 }
1827 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1828
ieee80211_sta_eosp(struct ieee80211_sta * pubsta)1829 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1830 {
1831 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1832 struct ieee80211_local *local = sta->local;
1833
1834 trace_api_eosp(local, pubsta);
1835
1836 clear_sta_flag(sta, WLAN_STA_SP);
1837 }
1838 EXPORT_SYMBOL(ieee80211_sta_eosp);
1839
ieee80211_send_eosp_nullfunc(struct ieee80211_sta * pubsta,int tid)1840 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1841 {
1842 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1843 enum ieee80211_frame_release_type reason;
1844 bool more_data;
1845
1846 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1847
1848 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1849 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1850 reason, 0);
1851
1852 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1853 }
1854 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1855
ieee80211_sta_set_buffered(struct ieee80211_sta * pubsta,u8 tid,bool buffered)1856 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1857 u8 tid, bool buffered)
1858 {
1859 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1860
1861 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1862 return;
1863
1864 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1865
1866 if (buffered)
1867 set_bit(tid, &sta->driver_buffered_tids);
1868 else
1869 clear_bit(tid, &sta->driver_buffered_tids);
1870
1871 sta_info_recalc_tim(sta);
1872 }
1873 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1874
ieee80211_sta_register_airtime(struct ieee80211_sta * pubsta,u8 tid,u32 tx_airtime,u32 rx_airtime)1875 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
1876 u32 tx_airtime, u32 rx_airtime)
1877 {
1878 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1879 struct ieee80211_local *local = sta->sdata->local;
1880 u8 ac = ieee80211_ac_from_tid(tid);
1881 u32 airtime = 0;
1882
1883 if (sta->local->airtime_flags & AIRTIME_USE_TX)
1884 airtime += tx_airtime;
1885 if (sta->local->airtime_flags & AIRTIME_USE_RX)
1886 airtime += rx_airtime;
1887
1888 spin_lock_bh(&local->active_txq_lock[ac]);
1889 sta->airtime[ac].tx_airtime += tx_airtime;
1890 sta->airtime[ac].rx_airtime += rx_airtime;
1891 sta->airtime[ac].deficit -= airtime;
1892 spin_unlock_bh(&local->active_txq_lock[ac]);
1893 }
1894 EXPORT_SYMBOL(ieee80211_sta_register_airtime);
1895
sta_info_move_state(struct sta_info * sta,enum ieee80211_sta_state new_state)1896 int sta_info_move_state(struct sta_info *sta,
1897 enum ieee80211_sta_state new_state)
1898 {
1899 might_sleep();
1900
1901 if (sta->sta_state == new_state)
1902 return 0;
1903
1904 /* check allowed transitions first */
1905
1906 switch (new_state) {
1907 case IEEE80211_STA_NONE:
1908 if (sta->sta_state != IEEE80211_STA_AUTH)
1909 return -EINVAL;
1910 break;
1911 case IEEE80211_STA_AUTH:
1912 if (sta->sta_state != IEEE80211_STA_NONE &&
1913 sta->sta_state != IEEE80211_STA_ASSOC)
1914 return -EINVAL;
1915 break;
1916 case IEEE80211_STA_ASSOC:
1917 if (sta->sta_state != IEEE80211_STA_AUTH &&
1918 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1919 return -EINVAL;
1920 break;
1921 case IEEE80211_STA_AUTHORIZED:
1922 if (sta->sta_state != IEEE80211_STA_ASSOC)
1923 return -EINVAL;
1924 break;
1925 default:
1926 WARN(1, "invalid state %d", new_state);
1927 return -EINVAL;
1928 }
1929
1930 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1931 sta->sta.addr, new_state);
1932
1933 /*
1934 * notify the driver before the actual changes so it can
1935 * fail the transition
1936 */
1937 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1938 int err = drv_sta_state(sta->local, sta->sdata, sta,
1939 sta->sta_state, new_state);
1940 if (err)
1941 return err;
1942 }
1943
1944 /* reflect the change in all state variables */
1945
1946 switch (new_state) {
1947 case IEEE80211_STA_NONE:
1948 if (sta->sta_state == IEEE80211_STA_AUTH)
1949 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1950 break;
1951 case IEEE80211_STA_AUTH:
1952 if (sta->sta_state == IEEE80211_STA_NONE) {
1953 set_bit(WLAN_STA_AUTH, &sta->_flags);
1954 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1955 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1956 ieee80211_recalc_min_chandef(sta->sdata);
1957 if (!sta->sta.support_p2p_ps)
1958 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1959 }
1960 break;
1961 case IEEE80211_STA_ASSOC:
1962 if (sta->sta_state == IEEE80211_STA_AUTH) {
1963 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1964 sta->assoc_at = ktime_get_boottime_ns();
1965 ieee80211_recalc_min_chandef(sta->sdata);
1966 if (!sta->sta.support_p2p_ps)
1967 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1968 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1969 ieee80211_vif_dec_num_mcast(sta->sdata);
1970 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1971 ieee80211_clear_fast_xmit(sta);
1972 ieee80211_clear_fast_rx(sta);
1973 }
1974 break;
1975 case IEEE80211_STA_AUTHORIZED:
1976 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1977 ieee80211_vif_inc_num_mcast(sta->sdata);
1978 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1979 ieee80211_check_fast_xmit(sta);
1980 ieee80211_check_fast_rx(sta);
1981 }
1982 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1983 sta->sdata->vif.type == NL80211_IFTYPE_AP)
1984 cfg80211_send_layer2_update(sta->sdata->dev,
1985 sta->sta.addr);
1986 break;
1987 default:
1988 break;
1989 }
1990
1991 sta->sta_state = new_state;
1992
1993 return 0;
1994 }
1995
sta_info_tx_streams(struct sta_info * sta)1996 u8 sta_info_tx_streams(struct sta_info *sta)
1997 {
1998 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1999 u8 rx_streams;
2000
2001 if (!sta->sta.ht_cap.ht_supported)
2002 return 1;
2003
2004 if (sta->sta.vht_cap.vht_supported) {
2005 int i;
2006 u16 tx_mcs_map =
2007 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
2008
2009 for (i = 7; i >= 0; i--)
2010 if ((tx_mcs_map & (0x3 << (i * 2))) !=
2011 IEEE80211_VHT_MCS_NOT_SUPPORTED)
2012 return i + 1;
2013 }
2014
2015 if (ht_cap->mcs.rx_mask[3])
2016 rx_streams = 4;
2017 else if (ht_cap->mcs.rx_mask[2])
2018 rx_streams = 3;
2019 else if (ht_cap->mcs.rx_mask[1])
2020 rx_streams = 2;
2021 else
2022 rx_streams = 1;
2023
2024 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
2025 return rx_streams;
2026
2027 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2028 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
2029 }
2030
2031 static struct ieee80211_sta_rx_stats *
sta_get_last_rx_stats(struct sta_info * sta)2032 sta_get_last_rx_stats(struct sta_info *sta)
2033 {
2034 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
2035 struct ieee80211_local *local = sta->local;
2036 int cpu;
2037
2038 if (!ieee80211_hw_check(&local->hw, USES_RSS))
2039 return stats;
2040
2041 for_each_possible_cpu(cpu) {
2042 struct ieee80211_sta_rx_stats *cpustats;
2043
2044 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2045
2046 if (time_after(cpustats->last_rx, stats->last_rx))
2047 stats = cpustats;
2048 }
2049
2050 return stats;
2051 }
2052
sta_stats_decode_rate(struct ieee80211_local * local,u32 rate,struct rate_info * rinfo)2053 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2054 struct rate_info *rinfo)
2055 {
2056 rinfo->bw = STA_STATS_GET(BW, rate);
2057
2058 switch (STA_STATS_GET(TYPE, rate)) {
2059 case STA_STATS_RATE_TYPE_VHT:
2060 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2061 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2062 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2063 if (STA_STATS_GET(SGI, rate))
2064 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2065 break;
2066 case STA_STATS_RATE_TYPE_HT:
2067 rinfo->flags = RATE_INFO_FLAGS_MCS;
2068 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2069 if (STA_STATS_GET(SGI, rate))
2070 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2071 break;
2072 case STA_STATS_RATE_TYPE_LEGACY: {
2073 struct ieee80211_supported_band *sband;
2074 u16 brate;
2075 unsigned int shift;
2076 int band = STA_STATS_GET(LEGACY_BAND, rate);
2077 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2078
2079 sband = local->hw.wiphy->bands[band];
2080 brate = sband->bitrates[rate_idx].bitrate;
2081 if (rinfo->bw == RATE_INFO_BW_5)
2082 shift = 2;
2083 else if (rinfo->bw == RATE_INFO_BW_10)
2084 shift = 1;
2085 else
2086 shift = 0;
2087 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2088 break;
2089 }
2090 case STA_STATS_RATE_TYPE_HE:
2091 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2092 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2093 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2094 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2095 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2096 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2097 break;
2098 }
2099 }
2100
sta_set_rate_info_rx(struct sta_info * sta,struct rate_info * rinfo)2101 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2102 {
2103 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2104
2105 if (rate == STA_STATS_RATE_INVALID)
2106 return -EINVAL;
2107
2108 sta_stats_decode_rate(sta->local, rate, rinfo);
2109 return 0;
2110 }
2111
sta_set_tidstats(struct sta_info * sta,struct cfg80211_tid_stats * tidstats,int tid)2112 static void sta_set_tidstats(struct sta_info *sta,
2113 struct cfg80211_tid_stats *tidstats,
2114 int tid)
2115 {
2116 struct ieee80211_local *local = sta->local;
2117
2118 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2119 unsigned int start;
2120
2121 do {
2122 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2123 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2124 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2125
2126 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2127 }
2128
2129 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2130 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2131 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2132 }
2133
2134 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2135 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2136 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2137 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2138 }
2139
2140 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2141 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2142 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2143 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2144 }
2145
2146 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2147 spin_lock_bh(&local->fq.lock);
2148 rcu_read_lock();
2149
2150 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2151 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2152 to_txq_info(sta->sta.txq[tid]));
2153
2154 rcu_read_unlock();
2155 spin_unlock_bh(&local->fq.lock);
2156 }
2157 }
2158
sta_get_stats_bytes(struct ieee80211_sta_rx_stats * rxstats)2159 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2160 {
2161 unsigned int start;
2162 u64 value;
2163
2164 do {
2165 start = u64_stats_fetch_begin(&rxstats->syncp);
2166 value = rxstats->bytes;
2167 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2168
2169 return value;
2170 }
2171
sta_set_sinfo(struct sta_info * sta,struct station_info * sinfo,bool tidstats)2172 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2173 bool tidstats)
2174 {
2175 struct ieee80211_sub_if_data *sdata = sta->sdata;
2176 struct ieee80211_local *local = sdata->local;
2177 u32 thr = 0;
2178 int i, ac, cpu;
2179 struct ieee80211_sta_rx_stats *last_rxstats;
2180
2181 last_rxstats = sta_get_last_rx_stats(sta);
2182
2183 sinfo->generation = sdata->local->sta_generation;
2184
2185 /* do before driver, so beacon filtering drivers have a
2186 * chance to e.g. just add the number of filtered beacons
2187 * (or just modify the value entirely, of course)
2188 */
2189 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2190 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2191
2192 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2193
2194 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2195 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2196 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2197 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2198 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2199 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2200
2201 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2202 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2203 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2204 }
2205
2206 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2207 sinfo->assoc_at = sta->assoc_at;
2208 sinfo->inactive_time =
2209 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2210
2211 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2212 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2213 sinfo->tx_bytes = 0;
2214 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2215 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2216 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2217 }
2218
2219 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2220 sinfo->tx_packets = 0;
2221 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2222 sinfo->tx_packets += sta->tx_stats.packets[ac];
2223 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2224 }
2225
2226 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2227 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2228 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2229
2230 if (sta->pcpu_rx_stats) {
2231 for_each_possible_cpu(cpu) {
2232 struct ieee80211_sta_rx_stats *cpurxs;
2233
2234 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2235 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2236 }
2237 }
2238
2239 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2240 }
2241
2242 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2243 sinfo->rx_packets = sta->rx_stats.packets;
2244 if (sta->pcpu_rx_stats) {
2245 for_each_possible_cpu(cpu) {
2246 struct ieee80211_sta_rx_stats *cpurxs;
2247
2248 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2249 sinfo->rx_packets += cpurxs->packets;
2250 }
2251 }
2252 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2253 }
2254
2255 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2256 sinfo->tx_retries = sta->status_stats.retry_count;
2257 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2258 }
2259
2260 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2261 sinfo->tx_failed = sta->status_stats.retry_failed;
2262 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2263 }
2264
2265 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2266 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2267 sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2268 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2269 }
2270
2271 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2272 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2273 sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2274 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2275 }
2276
2277 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2278 sinfo->airtime_weight = sta->airtime_weight;
2279 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2280 }
2281
2282 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2283 if (sta->pcpu_rx_stats) {
2284 for_each_possible_cpu(cpu) {
2285 struct ieee80211_sta_rx_stats *cpurxs;
2286
2287 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2288 sinfo->rx_dropped_misc += cpurxs->dropped;
2289 }
2290 }
2291
2292 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2293 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2294 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2295 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2296 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2297 }
2298
2299 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2300 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2301 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2302 sinfo->signal = (s8)last_rxstats->last_signal;
2303 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2304 }
2305
2306 if (!sta->pcpu_rx_stats &&
2307 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2308 sinfo->signal_avg =
2309 -ewma_signal_read(&sta->rx_stats_avg.signal);
2310 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2311 }
2312 }
2313
2314 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2315 * the sta->rx_stats struct, so the check here is fine with and without
2316 * pcpu statistics
2317 */
2318 if (last_rxstats->chains &&
2319 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2320 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2321 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2322 if (!sta->pcpu_rx_stats)
2323 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2324
2325 sinfo->chains = last_rxstats->chains;
2326
2327 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2328 sinfo->chain_signal[i] =
2329 last_rxstats->chain_signal_last[i];
2330 sinfo->chain_signal_avg[i] =
2331 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2332 }
2333 }
2334
2335 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2336 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2337 &sinfo->txrate);
2338 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2339 }
2340
2341 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2342 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2343 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2344 }
2345
2346 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2347 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2348 sta_set_tidstats(sta, &sinfo->pertid[i], i);
2349 }
2350
2351 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2352 #ifdef CONFIG_MAC80211_MESH
2353 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2354 BIT_ULL(NL80211_STA_INFO_PLID) |
2355 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2356 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2357 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2358 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2359 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE);
2360
2361 sinfo->llid = sta->mesh->llid;
2362 sinfo->plid = sta->mesh->plid;
2363 sinfo->plink_state = sta->mesh->plink_state;
2364 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2365 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2366 sinfo->t_offset = sta->mesh->t_offset;
2367 }
2368 sinfo->local_pm = sta->mesh->local_pm;
2369 sinfo->peer_pm = sta->mesh->peer_pm;
2370 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2371 sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2372 #endif
2373 }
2374
2375 sinfo->bss_param.flags = 0;
2376 if (sdata->vif.bss_conf.use_cts_prot)
2377 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2378 if (sdata->vif.bss_conf.use_short_preamble)
2379 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2380 if (sdata->vif.bss_conf.use_short_slot)
2381 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2382 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2383 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2384
2385 sinfo->sta_flags.set = 0;
2386 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2387 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2388 BIT(NL80211_STA_FLAG_WME) |
2389 BIT(NL80211_STA_FLAG_MFP) |
2390 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2391 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2392 BIT(NL80211_STA_FLAG_TDLS_PEER);
2393 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2394 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2395 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2396 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2397 if (sta->sta.wme)
2398 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2399 if (test_sta_flag(sta, WLAN_STA_MFP))
2400 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2401 if (test_sta_flag(sta, WLAN_STA_AUTH))
2402 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2403 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2404 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2405 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2406 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2407
2408 thr = sta_get_expected_throughput(sta);
2409
2410 if (thr != 0) {
2411 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2412 sinfo->expected_throughput = thr;
2413 }
2414
2415 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2416 sta->status_stats.ack_signal_filled) {
2417 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2418 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2419 }
2420
2421 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2422 sta->status_stats.ack_signal_filled) {
2423 sinfo->avg_ack_signal =
2424 -(s8)ewma_avg_signal_read(
2425 &sta->status_stats.avg_ack_signal);
2426 sinfo->filled |=
2427 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2428 }
2429
2430 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2431 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2432 sinfo->airtime_link_metric =
2433 airtime_link_metric_get(local, sta);
2434 }
2435 }
2436
sta_get_expected_throughput(struct sta_info * sta)2437 u32 sta_get_expected_throughput(struct sta_info *sta)
2438 {
2439 struct ieee80211_sub_if_data *sdata = sta->sdata;
2440 struct ieee80211_local *local = sdata->local;
2441 struct rate_control_ref *ref = NULL;
2442 u32 thr = 0;
2443
2444 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2445 ref = local->rate_ctrl;
2446
2447 /* check if the driver has a SW RC implementation */
2448 if (ref && ref->ops->get_expected_throughput)
2449 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2450 else
2451 thr = drv_get_expected_throughput(local, sta);
2452
2453 return thr;
2454 }
2455
ieee80211_sta_last_active(struct sta_info * sta)2456 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2457 {
2458 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2459
2460 if (!sta->status_stats.last_ack ||
2461 time_after(stats->last_rx, sta->status_stats.last_ack))
2462 return stats->last_rx;
2463 return sta->status_stats.last_ack;
2464 }
2465
sta_update_codel_params(struct sta_info * sta,u32 thr)2466 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2467 {
2468 if (!sta->sdata->local->ops->wake_tx_queue)
2469 return;
2470
2471 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2472 sta->cparams.target = MS2TIME(50);
2473 sta->cparams.interval = MS2TIME(300);
2474 sta->cparams.ecn = false;
2475 } else {
2476 sta->cparams.target = MS2TIME(20);
2477 sta->cparams.interval = MS2TIME(100);
2478 sta->cparams.ecn = true;
2479 }
2480 }
2481
ieee80211_sta_set_expected_throughput(struct ieee80211_sta * pubsta,u32 thr)2482 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2483 u32 thr)
2484 {
2485 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2486
2487 sta_update_codel_params(sta, thr);
2488 }
2489