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) 2018-2021 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_addrs(struct ieee80211_local * local,const u8 * sta_addr,const u8 * vif_addr)213 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
214 const u8 *sta_addr, const u8 *vif_addr)
215 {
216 struct rhlist_head *tmp;
217 struct sta_info *sta;
218
219 for_each_sta_info(local, sta_addr, sta, tmp) {
220 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr))
221 return sta;
222 }
223
224 return NULL;
225 }
226
sta_info_get_by_idx(struct ieee80211_sub_if_data * sdata,int idx)227 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
228 int idx)
229 {
230 struct ieee80211_local *local = sdata->local;
231 struct sta_info *sta;
232 int i = 0;
233
234 list_for_each_entry_rcu(sta, &local->sta_list, list,
235 lockdep_is_held(&local->sta_mtx)) {
236 if (sdata != sta->sdata)
237 continue;
238 if (i < idx) {
239 ++i;
240 continue;
241 }
242 return sta;
243 }
244
245 return NULL;
246 }
247
248 /**
249 * sta_info_free - free STA
250 *
251 * @local: pointer to the global information
252 * @sta: STA info to free
253 *
254 * This function must undo everything done by sta_info_alloc()
255 * that may happen before sta_info_insert(). It may only be
256 * called when sta_info_insert() has not been attempted (and
257 * if that fails, the station is freed anyway.)
258 */
sta_info_free(struct ieee80211_local * local,struct sta_info * sta)259 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
260 {
261 /*
262 * If we had used sta_info_pre_move_state() then we might not
263 * have gone through the state transitions down again, so do
264 * it here now (and warn if it's inserted).
265 *
266 * This will clear state such as fast TX/RX that may have been
267 * allocated during state transitions.
268 */
269 while (sta->sta_state > IEEE80211_STA_NONE) {
270 int ret;
271
272 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
273
274 ret = sta_info_move_state(sta, sta->sta_state - 1);
275 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret))
276 break;
277 }
278
279 if (sta->rate_ctrl)
280 rate_control_free_sta(sta);
281
282 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
283
284 if (sta->sta.txq[0])
285 kfree(to_txq_info(sta->sta.txq[0]));
286 kfree(rcu_dereference_raw(sta->sta.rates));
287 #ifdef CONFIG_MAC80211_MESH
288 kfree(sta->mesh);
289 #endif
290 free_percpu(sta->pcpu_rx_stats);
291 kfree(sta);
292 }
293
294 /* Caller must hold local->sta_mtx */
sta_info_hash_add(struct ieee80211_local * local,struct sta_info * sta)295 static int sta_info_hash_add(struct ieee80211_local *local,
296 struct sta_info *sta)
297 {
298 return rhltable_insert(&local->sta_hash, &sta->hash_node,
299 sta_rht_params);
300 }
301
sta_deliver_ps_frames(struct work_struct * wk)302 static void sta_deliver_ps_frames(struct work_struct *wk)
303 {
304 struct sta_info *sta;
305
306 sta = container_of(wk, struct sta_info, drv_deliver_wk);
307
308 if (sta->dead)
309 return;
310
311 local_bh_disable();
312 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
313 ieee80211_sta_ps_deliver_wakeup(sta);
314 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
315 ieee80211_sta_ps_deliver_poll_response(sta);
316 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
317 ieee80211_sta_ps_deliver_uapsd(sta);
318 local_bh_enable();
319 }
320
sta_prepare_rate_control(struct ieee80211_local * local,struct sta_info * sta,gfp_t gfp)321 static int sta_prepare_rate_control(struct ieee80211_local *local,
322 struct sta_info *sta, gfp_t gfp)
323 {
324 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
325 return 0;
326
327 sta->rate_ctrl = local->rate_ctrl;
328 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
329 sta, gfp);
330 if (!sta->rate_ctrl_priv)
331 return -ENOMEM;
332
333 return 0;
334 }
335
sta_info_alloc(struct ieee80211_sub_if_data * sdata,const u8 * addr,gfp_t gfp)336 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
337 const u8 *addr, gfp_t gfp)
338 {
339 struct ieee80211_local *local = sdata->local;
340 struct ieee80211_hw *hw = &local->hw;
341 struct sta_info *sta;
342 int i;
343
344 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
345 if (!sta)
346 return NULL;
347
348 if (ieee80211_hw_check(hw, USES_RSS)) {
349 sta->pcpu_rx_stats =
350 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
351 if (!sta->pcpu_rx_stats)
352 goto free;
353 }
354
355 spin_lock_init(&sta->lock);
356 spin_lock_init(&sta->ps_lock);
357 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
358 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
359 mutex_init(&sta->ampdu_mlme.mtx);
360 #ifdef CONFIG_MAC80211_MESH
361 if (ieee80211_vif_is_mesh(&sdata->vif)) {
362 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
363 if (!sta->mesh)
364 goto free;
365 sta->mesh->plink_sta = sta;
366 spin_lock_init(&sta->mesh->plink_lock);
367 if (ieee80211_vif_is_mesh(&sdata->vif) &&
368 !sdata->u.mesh.user_mpm)
369 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
370 0);
371 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
372 }
373 #endif
374
375 memcpy(sta->addr, addr, ETH_ALEN);
376 memcpy(sta->sta.addr, addr, ETH_ALEN);
377 sta->sta.max_rx_aggregation_subframes =
378 local->hw.max_rx_aggregation_subframes;
379
380 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
381 * The Tx path starts to use a key as soon as the key slot ptk_idx
382 * references to is not NULL. To not use the initial Rx-only key
383 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
384 * which always will refer to a NULL key.
385 */
386 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
387 sta->ptk_idx = INVALID_PTK_KEYIDX;
388
389 sta->local = local;
390 sta->sdata = sdata;
391 sta->rx_stats.last_rx = jiffies;
392
393 u64_stats_init(&sta->rx_stats.syncp);
394
395 ieee80211_init_frag_cache(&sta->frags);
396
397 sta->sta_state = IEEE80211_STA_NONE;
398
399 /* Mark TID as unreserved */
400 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
401
402 sta->last_connected = ktime_get_seconds();
403 ewma_signal_init(&sta->rx_stats_avg.signal);
404 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
405 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
406 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
407
408 if (local->ops->wake_tx_queue) {
409 void *txq_data;
410 int size = sizeof(struct txq_info) +
411 ALIGN(hw->txq_data_size, sizeof(void *));
412
413 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
414 if (!txq_data)
415 goto free;
416
417 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
418 struct txq_info *txq = txq_data + i * size;
419
420 /* might not do anything for the bufferable MMPDU TXQ */
421 ieee80211_txq_init(sdata, sta, txq, i);
422 }
423 }
424
425 if (sta_prepare_rate_control(local, sta, gfp))
426 goto free_txq;
427
428 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
429
430 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
431 skb_queue_head_init(&sta->ps_tx_buf[i]);
432 skb_queue_head_init(&sta->tx_filtered[i]);
433 sta->airtime[i].deficit = sta->airtime_weight;
434 atomic_set(&sta->airtime[i].aql_tx_pending, 0);
435 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i];
436 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i];
437 }
438
439 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
440 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
441
442 for (i = 0; i < NUM_NL80211_BANDS; i++) {
443 u32 mandatory = 0;
444 int r;
445
446 if (!hw->wiphy->bands[i])
447 continue;
448
449 switch (i) {
450 case NL80211_BAND_2GHZ:
451 /*
452 * We use both here, even if we cannot really know for
453 * sure the station will support both, but the only use
454 * for this is when we don't know anything yet and send
455 * management frames, and then we'll pick the lowest
456 * possible rate anyway.
457 * If we don't include _G here, we cannot find a rate
458 * in P2P, and thus trigger the WARN_ONCE() in rate.c
459 */
460 mandatory = IEEE80211_RATE_MANDATORY_B |
461 IEEE80211_RATE_MANDATORY_G;
462 break;
463 case NL80211_BAND_5GHZ:
464 mandatory = IEEE80211_RATE_MANDATORY_A;
465 break;
466 case NL80211_BAND_60GHZ:
467 WARN_ON(1);
468 mandatory = 0;
469 break;
470 }
471
472 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
473 struct ieee80211_rate *rate;
474
475 rate = &hw->wiphy->bands[i]->bitrates[r];
476
477 if (!(rate->flags & mandatory))
478 continue;
479 sta->sta.supp_rates[i] |= BIT(r);
480 }
481 }
482
483 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
484 if (sdata->vif.type == NL80211_IFTYPE_AP ||
485 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
486 struct ieee80211_supported_band *sband;
487 u8 smps;
488
489 sband = ieee80211_get_sband(sdata);
490 if (!sband)
491 goto free_txq;
492
493 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
495 /*
496 * Assume that hostapd advertises our caps in the beacon and
497 * this is the known_smps_mode for a station that just assciated
498 */
499 switch (smps) {
500 case WLAN_HT_SMPS_CONTROL_DISABLED:
501 sta->known_smps_mode = IEEE80211_SMPS_OFF;
502 break;
503 case WLAN_HT_SMPS_CONTROL_STATIC:
504 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
505 break;
506 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
507 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
508 break;
509 default:
510 WARN_ON(1);
511 }
512 }
513
514 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
515
516 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
517 sta->cparams.target = MS2TIME(20);
518 sta->cparams.interval = MS2TIME(100);
519 sta->cparams.ecn = true;
520
521 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
522
523 return sta;
524
525 free_txq:
526 if (sta->sta.txq[0])
527 kfree(to_txq_info(sta->sta.txq[0]));
528 free:
529 free_percpu(sta->pcpu_rx_stats);
530 #ifdef CONFIG_MAC80211_MESH
531 kfree(sta->mesh);
532 #endif
533 kfree(sta);
534 return NULL;
535 }
536
sta_info_insert_check(struct sta_info * sta)537 static int sta_info_insert_check(struct sta_info *sta)
538 {
539 struct ieee80211_sub_if_data *sdata = sta->sdata;
540
541 /*
542 * Can't be a WARN_ON because it can be triggered through a race:
543 * something inserts a STA (on one CPU) without holding the RTNL
544 * and another CPU turns off the net device.
545 */
546 if (unlikely(!ieee80211_sdata_running(sdata)))
547 return -ENETDOWN;
548
549 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
550 is_multicast_ether_addr(sta->sta.addr)))
551 return -EINVAL;
552
553 /* The RCU read lock is required by rhashtable due to
554 * asynchronous resize/rehash. We also require the mutex
555 * for correctness.
556 */
557 rcu_read_lock();
558 lockdep_assert_held(&sdata->local->sta_mtx);
559 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
560 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
561 rcu_read_unlock();
562 return -ENOTUNIQ;
563 }
564 rcu_read_unlock();
565
566 return 0;
567 }
568
sta_info_insert_drv_state(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sta_info * sta)569 static int sta_info_insert_drv_state(struct ieee80211_local *local,
570 struct ieee80211_sub_if_data *sdata,
571 struct sta_info *sta)
572 {
573 enum ieee80211_sta_state state;
574 int err = 0;
575
576 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
577 err = drv_sta_state(local, sdata, sta, state, state + 1);
578 if (err)
579 break;
580 }
581
582 if (!err) {
583 /*
584 * Drivers using legacy sta_add/sta_remove callbacks only
585 * get uploaded set to true after sta_add is called.
586 */
587 if (!local->ops->sta_add)
588 sta->uploaded = true;
589 return 0;
590 }
591
592 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
593 sdata_info(sdata,
594 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
595 sta->sta.addr, state + 1, err);
596 err = 0;
597 }
598
599 /* unwind on error */
600 for (; state > IEEE80211_STA_NOTEXIST; state--)
601 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
602
603 return err;
604 }
605
606 static void
ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data * sdata)607 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
608 {
609 struct ieee80211_local *local = sdata->local;
610 bool allow_p2p_go_ps = sdata->vif.p2p;
611 struct sta_info *sta;
612
613 rcu_read_lock();
614 list_for_each_entry_rcu(sta, &local->sta_list, list) {
615 if (sdata != sta->sdata ||
616 !test_sta_flag(sta, WLAN_STA_ASSOC))
617 continue;
618 if (!sta->sta.support_p2p_ps) {
619 allow_p2p_go_ps = false;
620 break;
621 }
622 }
623 rcu_read_unlock();
624
625 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
626 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
627 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
628 }
629 }
630
631 /*
632 * should be called with sta_mtx locked
633 * this function replaces the mutex lock
634 * with a RCU lock
635 */
sta_info_insert_finish(struct sta_info * sta)636 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
637 {
638 struct ieee80211_local *local = sta->local;
639 struct ieee80211_sub_if_data *sdata = sta->sdata;
640 struct station_info *sinfo = NULL;
641 int err = 0;
642
643 lockdep_assert_held(&local->sta_mtx);
644
645 /* check if STA exists already */
646 if (sta_info_get_bss(sdata, sta->sta.addr)) {
647 err = -EEXIST;
648 goto out_cleanup;
649 }
650
651 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
652 if (!sinfo) {
653 err = -ENOMEM;
654 goto out_cleanup;
655 }
656
657 local->num_sta++;
658 local->sta_generation++;
659 smp_mb();
660
661 /* simplify things and don't accept BA sessions yet */
662 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
663
664 /* make the station visible */
665 err = sta_info_hash_add(local, sta);
666 if (err)
667 goto out_drop_sta;
668
669 list_add_tail_rcu(&sta->list, &local->sta_list);
670
671 /* notify driver */
672 err = sta_info_insert_drv_state(local, sdata, sta);
673 if (err)
674 goto out_remove;
675
676 set_sta_flag(sta, WLAN_STA_INSERTED);
677
678 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
679 ieee80211_recalc_min_chandef(sta->sdata);
680 if (!sta->sta.support_p2p_ps)
681 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
682 }
683
684 /* accept BA sessions now */
685 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
686
687 ieee80211_sta_debugfs_add(sta);
688 rate_control_add_sta_debugfs(sta);
689
690 sinfo->generation = local->sta_generation;
691 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
692 kfree(sinfo);
693
694 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
695
696 /* move reference to rcu-protected */
697 rcu_read_lock();
698 mutex_unlock(&local->sta_mtx);
699
700 if (ieee80211_vif_is_mesh(&sdata->vif))
701 mesh_accept_plinks_update(sdata);
702
703 ieee80211_check_fast_xmit(sta);
704
705 return 0;
706 out_remove:
707 sta_info_hash_del(local, sta);
708 list_del_rcu(&sta->list);
709 out_drop_sta:
710 local->num_sta--;
711 synchronize_net();
712 out_cleanup:
713 cleanup_single_sta(sta);
714 mutex_unlock(&local->sta_mtx);
715 kfree(sinfo);
716 rcu_read_lock();
717 return err;
718 }
719
sta_info_insert_rcu(struct sta_info * sta)720 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
721 {
722 struct ieee80211_local *local = sta->local;
723 int err;
724
725 might_sleep();
726
727 mutex_lock(&local->sta_mtx);
728
729 err = sta_info_insert_check(sta);
730 if (err) {
731 sta_info_free(local, sta);
732 mutex_unlock(&local->sta_mtx);
733 rcu_read_lock();
734 return err;
735 }
736
737 return sta_info_insert_finish(sta);
738 }
739
sta_info_insert(struct sta_info * sta)740 int sta_info_insert(struct sta_info *sta)
741 {
742 int err = sta_info_insert_rcu(sta);
743
744 rcu_read_unlock();
745
746 return err;
747 }
748
__bss_tim_set(u8 * tim,u16 id)749 static inline void __bss_tim_set(u8 *tim, u16 id)
750 {
751 /*
752 * This format has been mandated by the IEEE specifications,
753 * so this line may not be changed to use the __set_bit() format.
754 */
755 tim[id / 8] |= (1 << (id % 8));
756 }
757
__bss_tim_clear(u8 * tim,u16 id)758 static inline void __bss_tim_clear(u8 *tim, u16 id)
759 {
760 /*
761 * This format has been mandated by the IEEE specifications,
762 * so this line may not be changed to use the __clear_bit() format.
763 */
764 tim[id / 8] &= ~(1 << (id % 8));
765 }
766
__bss_tim_get(u8 * tim,u16 id)767 static inline bool __bss_tim_get(u8 *tim, u16 id)
768 {
769 /*
770 * This format has been mandated by the IEEE specifications,
771 * so this line may not be changed to use the test_bit() format.
772 */
773 return tim[id / 8] & (1 << (id % 8));
774 }
775
ieee80211_tids_for_ac(int ac)776 static unsigned long ieee80211_tids_for_ac(int ac)
777 {
778 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
779 switch (ac) {
780 case IEEE80211_AC_VO:
781 return BIT(6) | BIT(7);
782 case IEEE80211_AC_VI:
783 return BIT(4) | BIT(5);
784 case IEEE80211_AC_BE:
785 return BIT(0) | BIT(3);
786 case IEEE80211_AC_BK:
787 return BIT(1) | BIT(2);
788 default:
789 WARN_ON(1);
790 return 0;
791 }
792 }
793
__sta_info_recalc_tim(struct sta_info * sta,bool ignore_pending)794 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
795 {
796 struct ieee80211_local *local = sta->local;
797 struct ps_data *ps;
798 bool indicate_tim = false;
799 u8 ignore_for_tim = sta->sta.uapsd_queues;
800 int ac;
801 u16 id = sta->sta.aid;
802
803 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
804 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
805 if (WARN_ON_ONCE(!sta->sdata->bss))
806 return;
807
808 ps = &sta->sdata->bss->ps;
809 #ifdef CONFIG_MAC80211_MESH
810 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
811 ps = &sta->sdata->u.mesh.ps;
812 #endif
813 } else {
814 return;
815 }
816
817 /* No need to do anything if the driver does all */
818 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
819 return;
820
821 if (sta->dead)
822 goto done;
823
824 /*
825 * If all ACs are delivery-enabled then we should build
826 * the TIM bit for all ACs anyway; if only some are then
827 * we ignore those and build the TIM bit using only the
828 * non-enabled ones.
829 */
830 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
831 ignore_for_tim = 0;
832
833 if (ignore_pending)
834 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
835
836 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
837 unsigned long tids;
838
839 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
840 continue;
841
842 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
843 !skb_queue_empty(&sta->ps_tx_buf[ac]);
844 if (indicate_tim)
845 break;
846
847 tids = ieee80211_tids_for_ac(ac);
848
849 indicate_tim |=
850 sta->driver_buffered_tids & tids;
851 indicate_tim |=
852 sta->txq_buffered_tids & tids;
853 }
854
855 done:
856 spin_lock_bh(&local->tim_lock);
857
858 if (indicate_tim == __bss_tim_get(ps->tim, id))
859 goto out_unlock;
860
861 if (indicate_tim)
862 __bss_tim_set(ps->tim, id);
863 else
864 __bss_tim_clear(ps->tim, id);
865
866 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
867 local->tim_in_locked_section = true;
868 drv_set_tim(local, &sta->sta, indicate_tim);
869 local->tim_in_locked_section = false;
870 }
871
872 out_unlock:
873 spin_unlock_bh(&local->tim_lock);
874 }
875
sta_info_recalc_tim(struct sta_info * sta)876 void sta_info_recalc_tim(struct sta_info *sta)
877 {
878 __sta_info_recalc_tim(sta, false);
879 }
880
sta_info_buffer_expired(struct sta_info * sta,struct sk_buff * skb)881 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
882 {
883 struct ieee80211_tx_info *info;
884 int timeout;
885
886 if (!skb)
887 return false;
888
889 info = IEEE80211_SKB_CB(skb);
890
891 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
892 timeout = (sta->listen_interval *
893 sta->sdata->vif.bss_conf.beacon_int *
894 32 / 15625) * HZ;
895 if (timeout < STA_TX_BUFFER_EXPIRE)
896 timeout = STA_TX_BUFFER_EXPIRE;
897 return time_after(jiffies, info->control.jiffies + timeout);
898 }
899
900
sta_info_cleanup_expire_buffered_ac(struct ieee80211_local * local,struct sta_info * sta,int ac)901 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
902 struct sta_info *sta, int ac)
903 {
904 unsigned long flags;
905 struct sk_buff *skb;
906
907 /*
908 * First check for frames that should expire on the filtered
909 * queue. Frames here were rejected by the driver and are on
910 * a separate queue to avoid reordering with normal PS-buffered
911 * frames. They also aren't accounted for right now in the
912 * total_ps_buffered counter.
913 */
914 for (;;) {
915 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
916 skb = skb_peek(&sta->tx_filtered[ac]);
917 if (sta_info_buffer_expired(sta, skb))
918 skb = __skb_dequeue(&sta->tx_filtered[ac]);
919 else
920 skb = NULL;
921 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
922
923 /*
924 * Frames are queued in order, so if this one
925 * hasn't expired yet we can stop testing. If
926 * we actually reached the end of the queue we
927 * also need to stop, of course.
928 */
929 if (!skb)
930 break;
931 ieee80211_free_txskb(&local->hw, skb);
932 }
933
934 /*
935 * Now also check the normal PS-buffered queue, this will
936 * only find something if the filtered queue was emptied
937 * since the filtered frames are all before the normal PS
938 * buffered frames.
939 */
940 for (;;) {
941 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
942 skb = skb_peek(&sta->ps_tx_buf[ac]);
943 if (sta_info_buffer_expired(sta, skb))
944 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
945 else
946 skb = NULL;
947 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
948
949 /*
950 * frames are queued in order, so if this one
951 * hasn't expired yet (or we reached the end of
952 * the queue) we can stop testing
953 */
954 if (!skb)
955 break;
956
957 local->total_ps_buffered--;
958 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
959 sta->sta.addr);
960 ieee80211_free_txskb(&local->hw, skb);
961 }
962
963 /*
964 * Finally, recalculate the TIM bit for this station -- it might
965 * now be clear because the station was too slow to retrieve its
966 * frames.
967 */
968 sta_info_recalc_tim(sta);
969
970 /*
971 * Return whether there are any frames still buffered, this is
972 * used to check whether the cleanup timer still needs to run,
973 * if there are no frames we don't need to rearm the timer.
974 */
975 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
976 skb_queue_empty(&sta->tx_filtered[ac]));
977 }
978
sta_info_cleanup_expire_buffered(struct ieee80211_local * local,struct sta_info * sta)979 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
980 struct sta_info *sta)
981 {
982 bool have_buffered = false;
983 int ac;
984
985 /* This is only necessary for stations on BSS/MBSS interfaces */
986 if (!sta->sdata->bss &&
987 !ieee80211_vif_is_mesh(&sta->sdata->vif))
988 return false;
989
990 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
991 have_buffered |=
992 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
993
994 return have_buffered;
995 }
996
__sta_info_destroy_part1(struct sta_info * sta)997 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
998 {
999 struct ieee80211_local *local;
1000 struct ieee80211_sub_if_data *sdata;
1001 int ret;
1002
1003 might_sleep();
1004
1005 if (!sta)
1006 return -ENOENT;
1007
1008 local = sta->local;
1009 sdata = sta->sdata;
1010
1011 lockdep_assert_held(&local->sta_mtx);
1012
1013 /*
1014 * Before removing the station from the driver and
1015 * rate control, it might still start new aggregation
1016 * sessions -- block that to make sure the tear-down
1017 * will be sufficient.
1018 */
1019 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1020 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
1021
1022 /*
1023 * Before removing the station from the driver there might be pending
1024 * rx frames on RSS queues sent prior to the disassociation - wait for
1025 * all such frames to be processed.
1026 */
1027 drv_sync_rx_queues(local, sta);
1028
1029 ret = sta_info_hash_del(local, sta);
1030 if (WARN_ON(ret))
1031 return ret;
1032
1033 /*
1034 * for TDLS peers, make sure to return to the base channel before
1035 * removal.
1036 */
1037 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
1038 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
1039 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
1040 }
1041
1042 list_del_rcu(&sta->list);
1043 sta->removed = true;
1044
1045 if (sta->uploaded)
1046 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
1047
1048 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1049 rcu_access_pointer(sdata->u.vlan.sta) == sta)
1050 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1051
1052 return 0;
1053 }
1054
__sta_info_destroy_part2(struct sta_info * sta)1055 static void __sta_info_destroy_part2(struct sta_info *sta)
1056 {
1057 struct ieee80211_local *local = sta->local;
1058 struct ieee80211_sub_if_data *sdata = sta->sdata;
1059 struct station_info *sinfo;
1060 int ret;
1061
1062 /*
1063 * NOTE: This assumes at least synchronize_net() was done
1064 * after _part1 and before _part2!
1065 */
1066
1067 might_sleep();
1068 lockdep_assert_held(&local->sta_mtx);
1069
1070 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1071 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1072 WARN_ON_ONCE(ret);
1073 }
1074
1075 /* now keys can no longer be reached */
1076 ieee80211_free_sta_keys(local, sta);
1077
1078 /* disable TIM bit - last chance to tell driver */
1079 __sta_info_recalc_tim(sta, true);
1080
1081 sta->dead = true;
1082
1083 local->num_sta--;
1084 local->sta_generation++;
1085
1086 while (sta->sta_state > IEEE80211_STA_NONE) {
1087 ret = sta_info_move_state(sta, sta->sta_state - 1);
1088 if (ret) {
1089 WARN_ON_ONCE(1);
1090 break;
1091 }
1092 }
1093
1094 if (sta->uploaded) {
1095 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1096 IEEE80211_STA_NOTEXIST);
1097 WARN_ON_ONCE(ret != 0);
1098 }
1099
1100 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1101
1102 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1103 if (sinfo)
1104 sta_set_sinfo(sta, sinfo, true);
1105 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1106 kfree(sinfo);
1107
1108 ieee80211_sta_debugfs_remove(sta);
1109
1110 ieee80211_destroy_frag_cache(&sta->frags);
1111
1112 cleanup_single_sta(sta);
1113 }
1114
__sta_info_destroy(struct sta_info * sta)1115 int __must_check __sta_info_destroy(struct sta_info *sta)
1116 {
1117 int err = __sta_info_destroy_part1(sta);
1118
1119 if (err)
1120 return err;
1121
1122 synchronize_net();
1123
1124 __sta_info_destroy_part2(sta);
1125
1126 return 0;
1127 }
1128
sta_info_destroy_addr(struct ieee80211_sub_if_data * sdata,const u8 * addr)1129 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1130 {
1131 struct sta_info *sta;
1132 int ret;
1133
1134 mutex_lock(&sdata->local->sta_mtx);
1135 sta = sta_info_get(sdata, addr);
1136 ret = __sta_info_destroy(sta);
1137 mutex_unlock(&sdata->local->sta_mtx);
1138
1139 return ret;
1140 }
1141
sta_info_destroy_addr_bss(struct ieee80211_sub_if_data * sdata,const u8 * addr)1142 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1143 const u8 *addr)
1144 {
1145 struct sta_info *sta;
1146 int ret;
1147
1148 mutex_lock(&sdata->local->sta_mtx);
1149 sta = sta_info_get_bss(sdata, addr);
1150 ret = __sta_info_destroy(sta);
1151 mutex_unlock(&sdata->local->sta_mtx);
1152
1153 return ret;
1154 }
1155
sta_info_cleanup(struct timer_list * t)1156 static void sta_info_cleanup(struct timer_list *t)
1157 {
1158 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1159 struct sta_info *sta;
1160 bool timer_needed = false;
1161
1162 rcu_read_lock();
1163 list_for_each_entry_rcu(sta, &local->sta_list, list)
1164 if (sta_info_cleanup_expire_buffered(local, sta))
1165 timer_needed = true;
1166 rcu_read_unlock();
1167
1168 if (local->quiescing)
1169 return;
1170
1171 if (!timer_needed)
1172 return;
1173
1174 mod_timer(&local->sta_cleanup,
1175 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1176 }
1177
sta_info_init(struct ieee80211_local * local)1178 int sta_info_init(struct ieee80211_local *local)
1179 {
1180 int err;
1181
1182 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1183 if (err)
1184 return err;
1185
1186 spin_lock_init(&local->tim_lock);
1187 mutex_init(&local->sta_mtx);
1188 INIT_LIST_HEAD(&local->sta_list);
1189
1190 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1191 return 0;
1192 }
1193
sta_info_stop(struct ieee80211_local * local)1194 void sta_info_stop(struct ieee80211_local *local)
1195 {
1196 del_timer_sync(&local->sta_cleanup);
1197 rhltable_destroy(&local->sta_hash);
1198 }
1199
1200
__sta_info_flush(struct ieee80211_sub_if_data * sdata,bool vlans)1201 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1202 {
1203 struct ieee80211_local *local = sdata->local;
1204 struct sta_info *sta, *tmp;
1205 LIST_HEAD(free_list);
1206 int ret = 0;
1207
1208 might_sleep();
1209
1210 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1211 WARN_ON(vlans && !sdata->bss);
1212
1213 mutex_lock(&local->sta_mtx);
1214 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1215 if (sdata == sta->sdata ||
1216 (vlans && sdata->bss == sta->sdata->bss)) {
1217 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1218 list_add(&sta->free_list, &free_list);
1219 ret++;
1220 }
1221 }
1222
1223 if (!list_empty(&free_list)) {
1224 synchronize_net();
1225 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1226 __sta_info_destroy_part2(sta);
1227 }
1228 mutex_unlock(&local->sta_mtx);
1229
1230 return ret;
1231 }
1232
ieee80211_sta_expire(struct ieee80211_sub_if_data * sdata,unsigned long exp_time)1233 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1234 unsigned long exp_time)
1235 {
1236 struct ieee80211_local *local = sdata->local;
1237 struct sta_info *sta, *tmp;
1238
1239 mutex_lock(&local->sta_mtx);
1240
1241 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1242 unsigned long last_active = ieee80211_sta_last_active(sta);
1243
1244 if (sdata != sta->sdata)
1245 continue;
1246
1247 if (time_is_before_jiffies(last_active + exp_time)) {
1248 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1249 sta->sta.addr);
1250
1251 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1252 test_sta_flag(sta, WLAN_STA_PS_STA))
1253 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1254
1255 WARN_ON(__sta_info_destroy(sta));
1256 }
1257 }
1258
1259 mutex_unlock(&local->sta_mtx);
1260 }
1261
ieee80211_find_sta_by_ifaddr(struct ieee80211_hw * hw,const u8 * addr,const u8 * localaddr)1262 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1263 const u8 *addr,
1264 const u8 *localaddr)
1265 {
1266 struct ieee80211_local *local = hw_to_local(hw);
1267 struct rhlist_head *tmp;
1268 struct sta_info *sta;
1269
1270 /*
1271 * Just return a random station if localaddr is NULL
1272 * ... first in list.
1273 */
1274 for_each_sta_info(local, addr, sta, tmp) {
1275 if (localaddr &&
1276 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1277 continue;
1278 if (!sta->uploaded)
1279 return NULL;
1280 return &sta->sta;
1281 }
1282
1283 return NULL;
1284 }
1285 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1286
ieee80211_find_sta(struct ieee80211_vif * vif,const u8 * addr)1287 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1288 const u8 *addr)
1289 {
1290 struct sta_info *sta;
1291
1292 if (!vif)
1293 return NULL;
1294
1295 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1296 if (!sta)
1297 return NULL;
1298
1299 if (!sta->uploaded)
1300 return NULL;
1301
1302 return &sta->sta;
1303 }
1304 EXPORT_SYMBOL(ieee80211_find_sta);
1305
1306 /* powersave support code */
ieee80211_sta_ps_deliver_wakeup(struct sta_info * sta)1307 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1308 {
1309 struct ieee80211_sub_if_data *sdata = sta->sdata;
1310 struct ieee80211_local *local = sdata->local;
1311 struct sk_buff_head pending;
1312 int filtered = 0, buffered = 0, ac, i;
1313 unsigned long flags;
1314 struct ps_data *ps;
1315
1316 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1317 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1318 u.ap);
1319
1320 if (sdata->vif.type == NL80211_IFTYPE_AP)
1321 ps = &sdata->bss->ps;
1322 else if (ieee80211_vif_is_mesh(&sdata->vif))
1323 ps = &sdata->u.mesh.ps;
1324 else
1325 return;
1326
1327 clear_sta_flag(sta, WLAN_STA_SP);
1328
1329 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1330 sta->driver_buffered_tids = 0;
1331 sta->txq_buffered_tids = 0;
1332
1333 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1334 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1335
1336 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1337 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1338 continue;
1339
1340 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
1341 }
1342
1343 skb_queue_head_init(&pending);
1344
1345 /* sync with ieee80211_tx_h_unicast_ps_buf */
1346 spin_lock(&sta->ps_lock);
1347 /* Send all buffered frames to the station */
1348 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1349 int count = skb_queue_len(&pending), tmp;
1350
1351 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1352 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1353 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1354 tmp = skb_queue_len(&pending);
1355 filtered += tmp - count;
1356 count = tmp;
1357
1358 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1359 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1360 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1361 tmp = skb_queue_len(&pending);
1362 buffered += tmp - count;
1363 }
1364
1365 ieee80211_add_pending_skbs(local, &pending);
1366
1367 /* now we're no longer in the deliver code */
1368 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1369
1370 /* The station might have polled and then woken up before we responded,
1371 * so clear these flags now to avoid them sticking around.
1372 */
1373 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1374 clear_sta_flag(sta, WLAN_STA_UAPSD);
1375 spin_unlock(&sta->ps_lock);
1376
1377 atomic_dec(&ps->num_sta_ps);
1378
1379 local->total_ps_buffered -= buffered;
1380
1381 sta_info_recalc_tim(sta);
1382
1383 ps_dbg(sdata,
1384 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1385 sta->sta.addr, sta->sta.aid, filtered, buffered);
1386
1387 ieee80211_check_fast_xmit(sta);
1388 }
1389
ieee80211_send_null_response(struct sta_info * sta,int tid,enum ieee80211_frame_release_type reason,bool call_driver,bool more_data)1390 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1391 enum ieee80211_frame_release_type reason,
1392 bool call_driver, bool more_data)
1393 {
1394 struct ieee80211_sub_if_data *sdata = sta->sdata;
1395 struct ieee80211_local *local = sdata->local;
1396 struct ieee80211_qos_hdr *nullfunc;
1397 struct sk_buff *skb;
1398 int size = sizeof(*nullfunc);
1399 __le16 fc;
1400 bool qos = sta->sta.wme;
1401 struct ieee80211_tx_info *info;
1402 struct ieee80211_chanctx_conf *chanctx_conf;
1403
1404 if (qos) {
1405 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1406 IEEE80211_STYPE_QOS_NULLFUNC |
1407 IEEE80211_FCTL_FROMDS);
1408 } else {
1409 size -= 2;
1410 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1411 IEEE80211_STYPE_NULLFUNC |
1412 IEEE80211_FCTL_FROMDS);
1413 }
1414
1415 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1416 if (!skb)
1417 return;
1418
1419 skb_reserve(skb, local->hw.extra_tx_headroom);
1420
1421 nullfunc = skb_put(skb, size);
1422 nullfunc->frame_control = fc;
1423 nullfunc->duration_id = 0;
1424 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1425 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1426 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1427 nullfunc->seq_ctrl = 0;
1428
1429 skb->priority = tid;
1430 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1431 if (qos) {
1432 nullfunc->qos_ctrl = cpu_to_le16(tid);
1433
1434 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1435 nullfunc->qos_ctrl |=
1436 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1437 if (more_data)
1438 nullfunc->frame_control |=
1439 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1440 }
1441 }
1442
1443 info = IEEE80211_SKB_CB(skb);
1444
1445 /*
1446 * Tell TX path to send this frame even though the
1447 * STA may still remain is PS mode after this frame
1448 * exchange. Also set EOSP to indicate this packet
1449 * ends the poll/service period.
1450 */
1451 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1452 IEEE80211_TX_STATUS_EOSP |
1453 IEEE80211_TX_CTL_REQ_TX_STATUS;
1454
1455 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1456
1457 if (call_driver)
1458 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1459 reason, false);
1460
1461 skb->dev = sdata->dev;
1462
1463 rcu_read_lock();
1464 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1465 if (WARN_ON(!chanctx_conf)) {
1466 rcu_read_unlock();
1467 kfree_skb(skb);
1468 return;
1469 }
1470
1471 info->band = chanctx_conf->def.chan->band;
1472 ieee80211_xmit(sdata, sta, skb);
1473 rcu_read_unlock();
1474 }
1475
find_highest_prio_tid(unsigned long tids)1476 static int find_highest_prio_tid(unsigned long tids)
1477 {
1478 /* lower 3 TIDs aren't ordered perfectly */
1479 if (tids & 0xF8)
1480 return fls(tids) - 1;
1481 /* TID 0 is BE just like TID 3 */
1482 if (tids & BIT(0))
1483 return 0;
1484 return fls(tids) - 1;
1485 }
1486
1487 /* Indicates if the MORE_DATA bit should be set in the last
1488 * frame obtained by ieee80211_sta_ps_get_frames.
1489 * Note that driver_release_tids is relevant only if
1490 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1491 */
1492 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)1493 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1494 enum ieee80211_frame_release_type reason,
1495 unsigned long driver_release_tids)
1496 {
1497 int ac;
1498
1499 /* If the driver has data on more than one TID then
1500 * certainly there's more data if we release just a
1501 * single frame now (from a single TID). This will
1502 * only happen for PS-Poll.
1503 */
1504 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1505 hweight16(driver_release_tids) > 1)
1506 return true;
1507
1508 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1509 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1510 continue;
1511
1512 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1513 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1514 return true;
1515 }
1516
1517 return false;
1518 }
1519
1520 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)1521 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1522 enum ieee80211_frame_release_type reason,
1523 struct sk_buff_head *frames,
1524 unsigned long *driver_release_tids)
1525 {
1526 struct ieee80211_sub_if_data *sdata = sta->sdata;
1527 struct ieee80211_local *local = sdata->local;
1528 int ac;
1529
1530 /* Get response frame(s) and more data bit for the last one. */
1531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1532 unsigned long tids;
1533
1534 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1535 continue;
1536
1537 tids = ieee80211_tids_for_ac(ac);
1538
1539 /* if we already have frames from software, then we can't also
1540 * release from hardware queues
1541 */
1542 if (skb_queue_empty(frames)) {
1543 *driver_release_tids |=
1544 sta->driver_buffered_tids & tids;
1545 *driver_release_tids |= sta->txq_buffered_tids & tids;
1546 }
1547
1548 if (!*driver_release_tids) {
1549 struct sk_buff *skb;
1550
1551 while (n_frames > 0) {
1552 skb = skb_dequeue(&sta->tx_filtered[ac]);
1553 if (!skb) {
1554 skb = skb_dequeue(
1555 &sta->ps_tx_buf[ac]);
1556 if (skb)
1557 local->total_ps_buffered--;
1558 }
1559 if (!skb)
1560 break;
1561 n_frames--;
1562 __skb_queue_tail(frames, skb);
1563 }
1564 }
1565
1566 /* If we have more frames buffered on this AC, then abort the
1567 * loop since we can't send more data from other ACs before
1568 * the buffered frames from this.
1569 */
1570 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1571 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1572 break;
1573 }
1574 }
1575
1576 static void
ieee80211_sta_ps_deliver_response(struct sta_info * sta,int n_frames,u8 ignored_acs,enum ieee80211_frame_release_type reason)1577 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1578 int n_frames, u8 ignored_acs,
1579 enum ieee80211_frame_release_type reason)
1580 {
1581 struct ieee80211_sub_if_data *sdata = sta->sdata;
1582 struct ieee80211_local *local = sdata->local;
1583 unsigned long driver_release_tids = 0;
1584 struct sk_buff_head frames;
1585 bool more_data;
1586
1587 /* Service or PS-Poll period starts */
1588 set_sta_flag(sta, WLAN_STA_SP);
1589
1590 __skb_queue_head_init(&frames);
1591
1592 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1593 &frames, &driver_release_tids);
1594
1595 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1596
1597 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1598 driver_release_tids =
1599 BIT(find_highest_prio_tid(driver_release_tids));
1600
1601 if (skb_queue_empty(&frames) && !driver_release_tids) {
1602 int tid, ac;
1603
1604 /*
1605 * For PS-Poll, this can only happen due to a race condition
1606 * when we set the TIM bit and the station notices it, but
1607 * before it can poll for the frame we expire it.
1608 *
1609 * For uAPSD, this is said in the standard (11.2.1.5 h):
1610 * At each unscheduled SP for a non-AP STA, the AP shall
1611 * attempt to transmit at least one MSDU or MMPDU, but no
1612 * more than the value specified in the Max SP Length field
1613 * in the QoS Capability element from delivery-enabled ACs,
1614 * that are destined for the non-AP STA.
1615 *
1616 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1617 */
1618
1619 /* This will evaluate to 1, 3, 5 or 7. */
1620 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1621 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1622 break;
1623 tid = 7 - 2 * ac;
1624
1625 ieee80211_send_null_response(sta, tid, reason, true, false);
1626 } else if (!driver_release_tids) {
1627 struct sk_buff_head pending;
1628 struct sk_buff *skb;
1629 int num = 0;
1630 u16 tids = 0;
1631 bool need_null = false;
1632
1633 skb_queue_head_init(&pending);
1634
1635 while ((skb = __skb_dequeue(&frames))) {
1636 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1637 struct ieee80211_hdr *hdr = (void *) skb->data;
1638 u8 *qoshdr = NULL;
1639
1640 num++;
1641
1642 /*
1643 * Tell TX path to send this frame even though the
1644 * STA may still remain is PS mode after this frame
1645 * exchange.
1646 */
1647 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1648 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1649
1650 /*
1651 * Use MoreData flag to indicate whether there are
1652 * more buffered frames for this STA
1653 */
1654 if (more_data || !skb_queue_empty(&frames))
1655 hdr->frame_control |=
1656 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1657 else
1658 hdr->frame_control &=
1659 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1660
1661 if (ieee80211_is_data_qos(hdr->frame_control) ||
1662 ieee80211_is_qos_nullfunc(hdr->frame_control))
1663 qoshdr = ieee80211_get_qos_ctl(hdr);
1664
1665 tids |= BIT(skb->priority);
1666
1667 __skb_queue_tail(&pending, skb);
1668
1669 /* end service period after last frame or add one */
1670 if (!skb_queue_empty(&frames))
1671 continue;
1672
1673 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1674 /* for PS-Poll, there's only one frame */
1675 info->flags |= IEEE80211_TX_STATUS_EOSP |
1676 IEEE80211_TX_CTL_REQ_TX_STATUS;
1677 break;
1678 }
1679
1680 /* For uAPSD, things are a bit more complicated. If the
1681 * last frame has a QoS header (i.e. is a QoS-data or
1682 * QoS-nulldata frame) then just set the EOSP bit there
1683 * and be done.
1684 * If the frame doesn't have a QoS header (which means
1685 * it should be a bufferable MMPDU) then we can't set
1686 * the EOSP bit in the QoS header; add a QoS-nulldata
1687 * frame to the list to send it after the MMPDU.
1688 *
1689 * Note that this code is only in the mac80211-release
1690 * code path, we assume that the driver will not buffer
1691 * anything but QoS-data frames, or if it does, will
1692 * create the QoS-nulldata frame by itself if needed.
1693 *
1694 * Cf. 802.11-2012 10.2.1.10 (c).
1695 */
1696 if (qoshdr) {
1697 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1698
1699 info->flags |= IEEE80211_TX_STATUS_EOSP |
1700 IEEE80211_TX_CTL_REQ_TX_STATUS;
1701 } else {
1702 /* The standard isn't completely clear on this
1703 * as it says the more-data bit should be set
1704 * if there are more BUs. The QoS-Null frame
1705 * we're about to send isn't buffered yet, we
1706 * only create it below, but let's pretend it
1707 * was buffered just in case some clients only
1708 * expect more-data=0 when eosp=1.
1709 */
1710 hdr->frame_control |=
1711 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1712 need_null = true;
1713 num++;
1714 }
1715 break;
1716 }
1717
1718 drv_allow_buffered_frames(local, sta, tids, num,
1719 reason, more_data);
1720
1721 ieee80211_add_pending_skbs(local, &pending);
1722
1723 if (need_null)
1724 ieee80211_send_null_response(
1725 sta, find_highest_prio_tid(tids),
1726 reason, false, false);
1727
1728 sta_info_recalc_tim(sta);
1729 } else {
1730 int tid;
1731
1732 /*
1733 * We need to release a frame that is buffered somewhere in the
1734 * driver ... it'll have to handle that.
1735 * Note that the driver also has to check the number of frames
1736 * on the TIDs we're releasing from - if there are more than
1737 * n_frames it has to set the more-data bit (if we didn't ask
1738 * it to set it anyway due to other buffered frames); if there
1739 * are fewer than n_frames it has to make sure to adjust that
1740 * to allow the service period to end properly.
1741 */
1742 drv_release_buffered_frames(local, sta, driver_release_tids,
1743 n_frames, reason, more_data);
1744
1745 /*
1746 * Note that we don't recalculate the TIM bit here as it would
1747 * most likely have no effect at all unless the driver told us
1748 * that the TID(s) became empty before returning here from the
1749 * release function.
1750 * Either way, however, when the driver tells us that the TID(s)
1751 * became empty or we find that a txq became empty, we'll do the
1752 * TIM recalculation.
1753 */
1754
1755 if (!sta->sta.txq[0])
1756 return;
1757
1758 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1759 if (!sta->sta.txq[tid] ||
1760 !(driver_release_tids & BIT(tid)) ||
1761 txq_has_queue(sta->sta.txq[tid]))
1762 continue;
1763
1764 sta_info_recalc_tim(sta);
1765 break;
1766 }
1767 }
1768 }
1769
ieee80211_sta_ps_deliver_poll_response(struct sta_info * sta)1770 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1771 {
1772 u8 ignore_for_response = sta->sta.uapsd_queues;
1773
1774 /*
1775 * If all ACs are delivery-enabled then we should reply
1776 * from any of them, if only some are enabled we reply
1777 * only from the non-enabled ones.
1778 */
1779 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1780 ignore_for_response = 0;
1781
1782 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1783 IEEE80211_FRAME_RELEASE_PSPOLL);
1784 }
1785
ieee80211_sta_ps_deliver_uapsd(struct sta_info * sta)1786 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1787 {
1788 int n_frames = sta->sta.max_sp;
1789 u8 delivery_enabled = sta->sta.uapsd_queues;
1790
1791 /*
1792 * If we ever grow support for TSPEC this might happen if
1793 * the TSPEC update from hostapd comes in between a trigger
1794 * frame setting WLAN_STA_UAPSD in the RX path and this
1795 * actually getting called.
1796 */
1797 if (!delivery_enabled)
1798 return;
1799
1800 switch (sta->sta.max_sp) {
1801 case 1:
1802 n_frames = 2;
1803 break;
1804 case 2:
1805 n_frames = 4;
1806 break;
1807 case 3:
1808 n_frames = 6;
1809 break;
1810 case 0:
1811 /* XXX: what is a good value? */
1812 n_frames = 128;
1813 break;
1814 }
1815
1816 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1817 IEEE80211_FRAME_RELEASE_UAPSD);
1818 }
1819
ieee80211_sta_block_awake(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,bool block)1820 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1821 struct ieee80211_sta *pubsta, bool block)
1822 {
1823 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1824
1825 trace_api_sta_block_awake(sta->local, pubsta, block);
1826
1827 if (block) {
1828 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1829 ieee80211_clear_fast_xmit(sta);
1830 return;
1831 }
1832
1833 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1834 return;
1835
1836 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1837 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1838 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1839 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1840 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1841 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1842 /* must be asleep in this case */
1843 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1844 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1845 } else {
1846 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1847 ieee80211_check_fast_xmit(sta);
1848 }
1849 }
1850 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1851
ieee80211_sta_eosp(struct ieee80211_sta * pubsta)1852 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1853 {
1854 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1855 struct ieee80211_local *local = sta->local;
1856
1857 trace_api_eosp(local, pubsta);
1858
1859 clear_sta_flag(sta, WLAN_STA_SP);
1860 }
1861 EXPORT_SYMBOL(ieee80211_sta_eosp);
1862
ieee80211_send_eosp_nullfunc(struct ieee80211_sta * pubsta,int tid)1863 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1864 {
1865 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1866 enum ieee80211_frame_release_type reason;
1867 bool more_data;
1868
1869 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1870
1871 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1872 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1873 reason, 0);
1874
1875 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1876 }
1877 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1878
ieee80211_sta_set_buffered(struct ieee80211_sta * pubsta,u8 tid,bool buffered)1879 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1880 u8 tid, bool buffered)
1881 {
1882 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1883
1884 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1885 return;
1886
1887 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1888
1889 if (buffered)
1890 set_bit(tid, &sta->driver_buffered_tids);
1891 else
1892 clear_bit(tid, &sta->driver_buffered_tids);
1893
1894 sta_info_recalc_tim(sta);
1895 }
1896 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1897
ieee80211_sta_register_airtime(struct ieee80211_sta * pubsta,u8 tid,u32 tx_airtime,u32 rx_airtime)1898 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
1899 u32 tx_airtime, u32 rx_airtime)
1900 {
1901 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1902 struct ieee80211_local *local = sta->sdata->local;
1903 u8 ac = ieee80211_ac_from_tid(tid);
1904 u32 airtime = 0;
1905
1906 if (sta->local->airtime_flags & AIRTIME_USE_TX)
1907 airtime += tx_airtime;
1908 if (sta->local->airtime_flags & AIRTIME_USE_RX)
1909 airtime += rx_airtime;
1910
1911 spin_lock_bh(&local->active_txq_lock[ac]);
1912 sta->airtime[ac].tx_airtime += tx_airtime;
1913 sta->airtime[ac].rx_airtime += rx_airtime;
1914 sta->airtime[ac].deficit -= airtime;
1915 spin_unlock_bh(&local->active_txq_lock[ac]);
1916 }
1917 EXPORT_SYMBOL(ieee80211_sta_register_airtime);
1918
ieee80211_sta_update_pending_airtime(struct ieee80211_local * local,struct sta_info * sta,u8 ac,u16 tx_airtime,bool tx_completed)1919 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
1920 struct sta_info *sta, u8 ac,
1921 u16 tx_airtime, bool tx_completed)
1922 {
1923 int tx_pending;
1924
1925 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
1926 return;
1927
1928 if (!tx_completed) {
1929 if (sta)
1930 atomic_add(tx_airtime,
1931 &sta->airtime[ac].aql_tx_pending);
1932
1933 atomic_add(tx_airtime, &local->aql_total_pending_airtime);
1934 return;
1935 }
1936
1937 if (sta) {
1938 tx_pending = atomic_sub_return(tx_airtime,
1939 &sta->airtime[ac].aql_tx_pending);
1940 if (tx_pending < 0)
1941 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
1942 tx_pending, 0);
1943 }
1944
1945 tx_pending = atomic_sub_return(tx_airtime,
1946 &local->aql_total_pending_airtime);
1947 if (WARN_ONCE(tx_pending < 0,
1948 "Device %s AC %d pending airtime underflow: %u, %u",
1949 wiphy_name(local->hw.wiphy), ac, tx_pending,
1950 tx_airtime))
1951 atomic_cmpxchg(&local->aql_total_pending_airtime,
1952 tx_pending, 0);
1953 }
1954
sta_info_move_state(struct sta_info * sta,enum ieee80211_sta_state new_state)1955 int sta_info_move_state(struct sta_info *sta,
1956 enum ieee80211_sta_state new_state)
1957 {
1958 might_sleep();
1959
1960 if (sta->sta_state == new_state)
1961 return 0;
1962
1963 /* check allowed transitions first */
1964
1965 switch (new_state) {
1966 case IEEE80211_STA_NONE:
1967 if (sta->sta_state != IEEE80211_STA_AUTH)
1968 return -EINVAL;
1969 break;
1970 case IEEE80211_STA_AUTH:
1971 if (sta->sta_state != IEEE80211_STA_NONE &&
1972 sta->sta_state != IEEE80211_STA_ASSOC)
1973 return -EINVAL;
1974 break;
1975 case IEEE80211_STA_ASSOC:
1976 if (sta->sta_state != IEEE80211_STA_AUTH &&
1977 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1978 return -EINVAL;
1979 break;
1980 case IEEE80211_STA_AUTHORIZED:
1981 if (sta->sta_state != IEEE80211_STA_ASSOC)
1982 return -EINVAL;
1983 break;
1984 default:
1985 WARN(1, "invalid state %d", new_state);
1986 return -EINVAL;
1987 }
1988
1989 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1990 sta->sta.addr, new_state);
1991
1992 /*
1993 * notify the driver before the actual changes so it can
1994 * fail the transition
1995 */
1996 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1997 int err = drv_sta_state(sta->local, sta->sdata, sta,
1998 sta->sta_state, new_state);
1999 if (err)
2000 return err;
2001 }
2002
2003 /* reflect the change in all state variables */
2004
2005 switch (new_state) {
2006 case IEEE80211_STA_NONE:
2007 if (sta->sta_state == IEEE80211_STA_AUTH)
2008 clear_bit(WLAN_STA_AUTH, &sta->_flags);
2009 break;
2010 case IEEE80211_STA_AUTH:
2011 if (sta->sta_state == IEEE80211_STA_NONE) {
2012 set_bit(WLAN_STA_AUTH, &sta->_flags);
2013 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
2014 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
2015 ieee80211_recalc_min_chandef(sta->sdata);
2016 if (!sta->sta.support_p2p_ps)
2017 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2018 }
2019 break;
2020 case IEEE80211_STA_ASSOC:
2021 if (sta->sta_state == IEEE80211_STA_AUTH) {
2022 set_bit(WLAN_STA_ASSOC, &sta->_flags);
2023 sta->assoc_at = ktime_get_boottime_ns();
2024 ieee80211_recalc_min_chandef(sta->sdata);
2025 if (!sta->sta.support_p2p_ps)
2026 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2027 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
2028 ieee80211_vif_dec_num_mcast(sta->sdata);
2029 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2030 ieee80211_clear_fast_xmit(sta);
2031 ieee80211_clear_fast_rx(sta);
2032 }
2033 break;
2034 case IEEE80211_STA_AUTHORIZED:
2035 if (sta->sta_state == IEEE80211_STA_ASSOC) {
2036 ieee80211_vif_inc_num_mcast(sta->sdata);
2037 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2038 ieee80211_check_fast_xmit(sta);
2039 ieee80211_check_fast_rx(sta);
2040 }
2041 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2042 sta->sdata->vif.type == NL80211_IFTYPE_AP)
2043 cfg80211_send_layer2_update(sta->sdata->dev,
2044 sta->sta.addr);
2045 break;
2046 default:
2047 break;
2048 }
2049
2050 sta->sta_state = new_state;
2051
2052 return 0;
2053 }
2054
sta_info_tx_streams(struct sta_info * sta)2055 u8 sta_info_tx_streams(struct sta_info *sta)
2056 {
2057 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
2058 u8 rx_streams;
2059
2060 if (!sta->sta.ht_cap.ht_supported)
2061 return 1;
2062
2063 if (sta->sta.vht_cap.vht_supported) {
2064 int i;
2065 u16 tx_mcs_map =
2066 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
2067
2068 for (i = 7; i >= 0; i--)
2069 if ((tx_mcs_map & (0x3 << (i * 2))) !=
2070 IEEE80211_VHT_MCS_NOT_SUPPORTED)
2071 return i + 1;
2072 }
2073
2074 if (ht_cap->mcs.rx_mask[3])
2075 rx_streams = 4;
2076 else if (ht_cap->mcs.rx_mask[2])
2077 rx_streams = 3;
2078 else if (ht_cap->mcs.rx_mask[1])
2079 rx_streams = 2;
2080 else
2081 rx_streams = 1;
2082
2083 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
2084 return rx_streams;
2085
2086 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2087 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
2088 }
2089
2090 static struct ieee80211_sta_rx_stats *
sta_get_last_rx_stats(struct sta_info * sta)2091 sta_get_last_rx_stats(struct sta_info *sta)
2092 {
2093 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
2094 int cpu;
2095
2096 if (!sta->pcpu_rx_stats)
2097 return stats;
2098
2099 for_each_possible_cpu(cpu) {
2100 struct ieee80211_sta_rx_stats *cpustats;
2101
2102 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2103
2104 if (time_after(cpustats->last_rx, stats->last_rx))
2105 stats = cpustats;
2106 }
2107
2108 return stats;
2109 }
2110
sta_stats_decode_rate(struct ieee80211_local * local,u32 rate,struct rate_info * rinfo)2111 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2112 struct rate_info *rinfo)
2113 {
2114 rinfo->bw = STA_STATS_GET(BW, rate);
2115
2116 switch (STA_STATS_GET(TYPE, rate)) {
2117 case STA_STATS_RATE_TYPE_VHT:
2118 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2119 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2120 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2121 if (STA_STATS_GET(SGI, rate))
2122 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2123 break;
2124 case STA_STATS_RATE_TYPE_HT:
2125 rinfo->flags = RATE_INFO_FLAGS_MCS;
2126 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2127 if (STA_STATS_GET(SGI, rate))
2128 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2129 break;
2130 case STA_STATS_RATE_TYPE_LEGACY: {
2131 struct ieee80211_supported_band *sband;
2132 u16 brate;
2133 unsigned int shift;
2134 int band = STA_STATS_GET(LEGACY_BAND, rate);
2135 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2136
2137 sband = local->hw.wiphy->bands[band];
2138
2139 if (WARN_ON_ONCE(!sband->bitrates))
2140 break;
2141
2142 brate = sband->bitrates[rate_idx].bitrate;
2143 if (rinfo->bw == RATE_INFO_BW_5)
2144 shift = 2;
2145 else if (rinfo->bw == RATE_INFO_BW_10)
2146 shift = 1;
2147 else
2148 shift = 0;
2149 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2150 break;
2151 }
2152 case STA_STATS_RATE_TYPE_HE:
2153 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2154 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2155 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2156 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2157 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2158 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2159 break;
2160 }
2161 }
2162
sta_set_rate_info_rx(struct sta_info * sta,struct rate_info * rinfo)2163 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2164 {
2165 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2166
2167 if (rate == STA_STATS_RATE_INVALID)
2168 return -EINVAL;
2169
2170 sta_stats_decode_rate(sta->local, rate, rinfo);
2171 return 0;
2172 }
2173
sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats * rxstats,int tid)2174 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats,
2175 int tid)
2176 {
2177 unsigned int start;
2178 u64 value;
2179
2180 do {
2181 start = u64_stats_fetch_begin_irq(&rxstats->syncp);
2182 value = rxstats->msdu[tid];
2183 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start));
2184
2185 return value;
2186 }
2187
sta_set_tidstats(struct sta_info * sta,struct cfg80211_tid_stats * tidstats,int tid)2188 static void sta_set_tidstats(struct sta_info *sta,
2189 struct cfg80211_tid_stats *tidstats,
2190 int tid)
2191 {
2192 struct ieee80211_local *local = sta->local;
2193 int cpu;
2194
2195 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2196 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->rx_stats, tid);
2197
2198 if (sta->pcpu_rx_stats) {
2199 for_each_possible_cpu(cpu) {
2200 struct ieee80211_sta_rx_stats *cpurxs;
2201
2202 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2203 tidstats->rx_msdu +=
2204 sta_get_tidstats_msdu(cpurxs, tid);
2205 }
2206 }
2207
2208 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2209 }
2210
2211 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2212 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2213 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2214 }
2215
2216 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2217 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2218 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2219 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2220 }
2221
2222 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2223 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2224 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2225 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2226 }
2227
2228 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2229 spin_lock_bh(&local->fq.lock);
2230 rcu_read_lock();
2231
2232 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2233 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2234 to_txq_info(sta->sta.txq[tid]));
2235
2236 rcu_read_unlock();
2237 spin_unlock_bh(&local->fq.lock);
2238 }
2239 }
2240
sta_get_stats_bytes(struct ieee80211_sta_rx_stats * rxstats)2241 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2242 {
2243 unsigned int start;
2244 u64 value;
2245
2246 do {
2247 start = u64_stats_fetch_begin_irq(&rxstats->syncp);
2248 value = rxstats->bytes;
2249 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start));
2250
2251 return value;
2252 }
2253
sta_set_sinfo(struct sta_info * sta,struct station_info * sinfo,bool tidstats)2254 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2255 bool tidstats)
2256 {
2257 struct ieee80211_sub_if_data *sdata = sta->sdata;
2258 struct ieee80211_local *local = sdata->local;
2259 u32 thr = 0;
2260 int i, ac, cpu;
2261 struct ieee80211_sta_rx_stats *last_rxstats;
2262
2263 last_rxstats = sta_get_last_rx_stats(sta);
2264
2265 sinfo->generation = sdata->local->sta_generation;
2266
2267 /* do before driver, so beacon filtering drivers have a
2268 * chance to e.g. just add the number of filtered beacons
2269 * (or just modify the value entirely, of course)
2270 */
2271 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2272 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2273
2274 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2275 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2276 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2277 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2278 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2279 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2280 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2281
2282 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2283 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2284 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2285 }
2286
2287 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2288 sinfo->assoc_at = sta->assoc_at;
2289 sinfo->inactive_time =
2290 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2291
2292 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2293 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2294 sinfo->tx_bytes = 0;
2295 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2296 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2297 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2298 }
2299
2300 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2301 sinfo->tx_packets = 0;
2302 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2303 sinfo->tx_packets += sta->tx_stats.packets[ac];
2304 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2305 }
2306
2307 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2308 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2309 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2310
2311 if (sta->pcpu_rx_stats) {
2312 for_each_possible_cpu(cpu) {
2313 struct ieee80211_sta_rx_stats *cpurxs;
2314
2315 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2316 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2317 }
2318 }
2319
2320 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2321 }
2322
2323 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2324 sinfo->rx_packets = sta->rx_stats.packets;
2325 if (sta->pcpu_rx_stats) {
2326 for_each_possible_cpu(cpu) {
2327 struct ieee80211_sta_rx_stats *cpurxs;
2328
2329 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2330 sinfo->rx_packets += cpurxs->packets;
2331 }
2332 }
2333 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2334 }
2335
2336 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2337 sinfo->tx_retries = sta->status_stats.retry_count;
2338 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2339 }
2340
2341 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2342 sinfo->tx_failed = sta->status_stats.retry_failed;
2343 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2344 }
2345
2346 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2347 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2348 sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2349 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2350 }
2351
2352 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2353 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2354 sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2355 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2356 }
2357
2358 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2359 sinfo->airtime_weight = sta->airtime_weight;
2360 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2361 }
2362
2363 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2364 if (sta->pcpu_rx_stats) {
2365 for_each_possible_cpu(cpu) {
2366 struct ieee80211_sta_rx_stats *cpurxs;
2367
2368 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2369 sinfo->rx_dropped_misc += cpurxs->dropped;
2370 }
2371 }
2372
2373 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2374 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2375 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2376 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2377 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2378 }
2379
2380 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2381 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2382 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2383 sinfo->signal = (s8)last_rxstats->last_signal;
2384 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2385 }
2386
2387 if (!sta->pcpu_rx_stats &&
2388 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2389 sinfo->signal_avg =
2390 -ewma_signal_read(&sta->rx_stats_avg.signal);
2391 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2392 }
2393 }
2394
2395 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2396 * the sta->rx_stats struct, so the check here is fine with and without
2397 * pcpu statistics
2398 */
2399 if (last_rxstats->chains &&
2400 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2401 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2402 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2403 if (!sta->pcpu_rx_stats)
2404 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2405
2406 sinfo->chains = last_rxstats->chains;
2407
2408 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2409 sinfo->chain_signal[i] =
2410 last_rxstats->chain_signal_last[i];
2411 sinfo->chain_signal_avg[i] =
2412 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2413 }
2414 }
2415
2416 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2417 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2418 &sinfo->txrate);
2419 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2420 }
2421
2422 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2423 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2424 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2425 }
2426
2427 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2428 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2429 sta_set_tidstats(sta, &sinfo->pertid[i], i);
2430 }
2431
2432 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2433 #ifdef CONFIG_MAC80211_MESH
2434 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2435 BIT_ULL(NL80211_STA_INFO_PLID) |
2436 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2437 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2438 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2439 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2440 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) |
2441 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS);
2442
2443 sinfo->llid = sta->mesh->llid;
2444 sinfo->plid = sta->mesh->plid;
2445 sinfo->plink_state = sta->mesh->plink_state;
2446 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2447 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2448 sinfo->t_offset = sta->mesh->t_offset;
2449 }
2450 sinfo->local_pm = sta->mesh->local_pm;
2451 sinfo->peer_pm = sta->mesh->peer_pm;
2452 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2453 sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2454 sinfo->connected_to_as = sta->mesh->connected_to_as;
2455 #endif
2456 }
2457
2458 sinfo->bss_param.flags = 0;
2459 if (sdata->vif.bss_conf.use_cts_prot)
2460 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2461 if (sdata->vif.bss_conf.use_short_preamble)
2462 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2463 if (sdata->vif.bss_conf.use_short_slot)
2464 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2465 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2466 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2467
2468 sinfo->sta_flags.set = 0;
2469 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2470 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2471 BIT(NL80211_STA_FLAG_WME) |
2472 BIT(NL80211_STA_FLAG_MFP) |
2473 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2474 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2475 BIT(NL80211_STA_FLAG_TDLS_PEER);
2476 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2477 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2478 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2479 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2480 if (sta->sta.wme)
2481 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2482 if (test_sta_flag(sta, WLAN_STA_MFP))
2483 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2484 if (test_sta_flag(sta, WLAN_STA_AUTH))
2485 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2486 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2487 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2488 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2489 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2490
2491 thr = sta_get_expected_throughput(sta);
2492
2493 if (thr != 0) {
2494 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2495 sinfo->expected_throughput = thr;
2496 }
2497
2498 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2499 sta->status_stats.ack_signal_filled) {
2500 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2501 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2502 }
2503
2504 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2505 sta->status_stats.ack_signal_filled) {
2506 sinfo->avg_ack_signal =
2507 -(s8)ewma_avg_signal_read(
2508 &sta->status_stats.avg_ack_signal);
2509 sinfo->filled |=
2510 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2511 }
2512
2513 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2514 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2515 sinfo->airtime_link_metric =
2516 airtime_link_metric_get(local, sta);
2517 }
2518 }
2519
sta_get_expected_throughput(struct sta_info * sta)2520 u32 sta_get_expected_throughput(struct sta_info *sta)
2521 {
2522 struct ieee80211_sub_if_data *sdata = sta->sdata;
2523 struct ieee80211_local *local = sdata->local;
2524 struct rate_control_ref *ref = NULL;
2525 u32 thr = 0;
2526
2527 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2528 ref = local->rate_ctrl;
2529
2530 /* check if the driver has a SW RC implementation */
2531 if (ref && ref->ops->get_expected_throughput)
2532 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2533 else
2534 thr = drv_get_expected_throughput(local, sta);
2535
2536 return thr;
2537 }
2538
ieee80211_sta_last_active(struct sta_info * sta)2539 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2540 {
2541 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2542
2543 if (!sta->status_stats.last_ack ||
2544 time_after(stats->last_rx, sta->status_stats.last_ack))
2545 return stats->last_rx;
2546 return sta->status_stats.last_ack;
2547 }
2548
sta_update_codel_params(struct sta_info * sta,u32 thr)2549 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2550 {
2551 if (!sta->sdata->local->ops->wake_tx_queue)
2552 return;
2553
2554 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2555 sta->cparams.target = MS2TIME(50);
2556 sta->cparams.interval = MS2TIME(300);
2557 sta->cparams.ecn = false;
2558 } else {
2559 sta->cparams.target = MS2TIME(20);
2560 sta->cparams.interval = MS2TIME(100);
2561 sta->cparams.ecn = true;
2562 }
2563 }
2564
ieee80211_sta_set_expected_throughput(struct ieee80211_sta * pubsta,u32 thr)2565 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2566 u32 thr)
2567 {
2568 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2569
2570 sta_update_codel_params(sta, thr);
2571 }
2572