2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
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>
21 #include <net/mac80211.h>
22 #include "ieee80211_i.h"
23 #include "driver-ops.h"
26 #include "debugfs_sta.h"
31 * DOC: STA information lifetime rules
33 * STA info structures (&struct sta_info) are managed in a hash table
34 * for faster lookup and a list for iteration. They are managed using
35 * RCU, i.e. access to the list and hash table is protected by RCU.
37 * Upon allocating a STA info structure with sta_info_alloc(), the caller
38 * owns that structure. It must then insert it into the hash table using
39 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
40 * case (which acquires an rcu read section but must not be called from
41 * within one) will the pointer still be valid after the call. Note that
42 * the caller may not do much with the STA info before inserting it, in
43 * particular, it may not start any mesh peer link management or add
46 * When the insertion fails (sta_info_insert()) returns non-zero), the
47 * structure will have been freed by sta_info_insert()!
49 * Station entries are added by mac80211 when you establish a link with a
50 * peer. This means different things for the different type of interfaces
51 * we support. For a regular station this mean we add the AP sta when we
52 * receive an association response from the AP. For IBSS this occurs when
53 * get to know about a peer on the same IBSS. For WDS we add the sta for
54 * the peer immediately upon device open. When using AP mode we add stations
55 * for each respective station upon request from userspace through nl80211.
57 * In order to remove a STA info structure, various sta_info_destroy_*()
58 * calls are available.
60 * There is no concept of ownership on a STA entry, each structure is
61 * owned by the global hash table/list until it is removed. All users of
62 * the structure need to be RCU protected so that the structure won't be
63 * freed before they are done using it.
66 /* Caller must hold local->sta_mtx */
67 static int sta_info_hash_del(struct ieee80211_local *local,
72 s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)],
73 lockdep_is_held(&local->sta_mtx));
77 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
82 while (rcu_access_pointer(s->hnext) &&
83 rcu_access_pointer(s->hnext) != sta)
84 s = rcu_dereference_protected(s->hnext,
85 lockdep_is_held(&local->sta_mtx));
86 if (rcu_access_pointer(s->hnext)) {
87 rcu_assign_pointer(s->hnext, sta->hnext);
94 static void __cleanup_single_sta(struct sta_info *sta)
97 struct tid_ampdu_tx *tid_tx;
98 struct ieee80211_sub_if_data *sdata = sta->sdata;
99 struct ieee80211_local *local = sdata->local;
102 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
103 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
104 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
105 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
106 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
107 ps = &sdata->bss->ps;
108 else if (ieee80211_vif_is_mesh(&sdata->vif))
109 ps = &sdata->u.mesh.ps;
113 clear_sta_flag(sta, WLAN_STA_PS_STA);
114 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
115 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
117 atomic_dec(&ps->num_sta_ps);
118 sta_info_recalc_tim(sta);
121 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
122 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
123 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
124 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
127 if (ieee80211_vif_is_mesh(&sdata->vif))
128 mesh_sta_cleanup(sta);
130 cancel_work_sync(&sta->drv_deliver_wk);
133 * Destroy aggregation state here. It would be nice to wait for the
134 * driver to finish aggregation stop and then clean up, but for now
135 * drivers have to handle aggregation stop being requested, followed
136 * directly by station destruction.
138 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
139 kfree(sta->ampdu_mlme.tid_start_tx[i]);
140 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
143 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
148 static void cleanup_single_sta(struct sta_info *sta)
150 struct ieee80211_sub_if_data *sdata = sta->sdata;
151 struct ieee80211_local *local = sdata->local;
153 __cleanup_single_sta(sta);
154 sta_info_free(local, sta);
157 /* protected by RCU */
158 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
161 struct ieee80211_local *local = sdata->local;
162 struct sta_info *sta;
164 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
165 lockdep_is_held(&local->sta_mtx));
167 if (sta->sdata == sdata &&
168 ether_addr_equal(sta->sta.addr, addr))
170 sta = rcu_dereference_check(sta->hnext,
171 lockdep_is_held(&local->sta_mtx));
177 * Get sta info either from the specified interface
178 * or from one of its vlans
180 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
183 struct ieee80211_local *local = sdata->local;
184 struct sta_info *sta;
186 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
187 lockdep_is_held(&local->sta_mtx));
189 if ((sta->sdata == sdata ||
190 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
191 ether_addr_equal(sta->sta.addr, addr))
193 sta = rcu_dereference_check(sta->hnext,
194 lockdep_is_held(&local->sta_mtx));
199 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
202 struct ieee80211_local *local = sdata->local;
203 struct sta_info *sta;
206 list_for_each_entry_rcu(sta, &local->sta_list, list) {
207 if (sdata != sta->sdata)
220 * sta_info_free - free STA
222 * @local: pointer to the global information
223 * @sta: STA info to free
225 * This function must undo everything done by sta_info_alloc()
226 * that may happen before sta_info_insert(). It may only be
227 * called when sta_info_insert() has not been attempted (and
228 * if that fails, the station is freed anyway.)
230 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
235 rate_control_free_sta(sta);
238 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
239 kfree(sta->tx_lat[i].bins);
243 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
245 kfree(rcu_dereference_raw(sta->sta.rates));
249 /* Caller must hold local->sta_mtx */
250 static void sta_info_hash_add(struct ieee80211_local *local,
251 struct sta_info *sta)
253 lockdep_assert_held(&local->sta_mtx);
254 sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
255 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
258 static void sta_deliver_ps_frames(struct work_struct *wk)
260 struct sta_info *sta;
262 sta = container_of(wk, struct sta_info, drv_deliver_wk);
268 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
269 ieee80211_sta_ps_deliver_wakeup(sta);
270 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
271 ieee80211_sta_ps_deliver_poll_response(sta);
272 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
273 ieee80211_sta_ps_deliver_uapsd(sta);
277 static int sta_prepare_rate_control(struct ieee80211_local *local,
278 struct sta_info *sta, gfp_t gfp)
280 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
283 sta->rate_ctrl = local->rate_ctrl;
284 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
286 if (!sta->rate_ctrl_priv)
292 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
293 const u8 *addr, gfp_t gfp)
295 struct ieee80211_local *local = sdata->local;
296 struct sta_info *sta;
297 struct timespec uptime;
298 struct ieee80211_tx_latency_bin_ranges *tx_latency;
301 sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
306 tx_latency = rcu_dereference(local->tx_latency);
307 /* init stations Tx latency statistics && TID bins */
309 sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS *
310 sizeof(struct ieee80211_tx_latency_stat),
317 if (tx_latency->n_ranges) {
318 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
319 /* size of bins is size of the ranges +1 */
320 sta->tx_lat[i].bin_count =
321 tx_latency->n_ranges + 1;
322 sta->tx_lat[i].bins =
323 kcalloc(sta->tx_lat[i].bin_count,
324 sizeof(u32), GFP_ATOMIC);
325 if (!sta->tx_lat[i].bins) {
334 spin_lock_init(&sta->lock);
335 spin_lock_init(&sta->ps_lock);
336 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
337 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
338 mutex_init(&sta->ampdu_mlme.mtx);
339 #ifdef CONFIG_MAC80211_MESH
340 if (ieee80211_vif_is_mesh(&sdata->vif) &&
341 !sdata->u.mesh.user_mpm)
342 init_timer(&sta->plink_timer);
343 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
346 memcpy(sta->sta.addr, addr, ETH_ALEN);
349 sta->last_rx = jiffies;
351 sta->sta_state = IEEE80211_STA_NONE;
353 ktime_get_ts(&uptime);
354 sta->last_connected = uptime.tv_sec;
355 ewma_init(&sta->avg_signal, 1024, 8);
356 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
357 ewma_init(&sta->chain_signal_avg[i], 1024, 8);
359 if (sta_prepare_rate_control(local, sta, gfp))
362 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
364 * timer_to_tid must be initialized with identity mapping
365 * to enable session_timer's data differentiation. See
366 * sta_rx_agg_session_timer_expired for usage.
368 sta->timer_to_tid[i] = i;
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 skb_queue_head_init(&sta->ps_tx_buf[i]);
372 skb_queue_head_init(&sta->tx_filtered[i]);
375 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
376 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
378 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
379 if (sdata->vif.type == NL80211_IFTYPE_AP ||
380 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
381 struct ieee80211_supported_band *sband =
382 local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
383 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
384 IEEE80211_HT_CAP_SM_PS_SHIFT;
386 * Assume that hostapd advertises our caps in the beacon and
387 * this is the known_smps_mode for a station that just assciated
390 case WLAN_HT_SMPS_CONTROL_DISABLED:
391 sta->known_smps_mode = IEEE80211_SMPS_OFF;
393 case WLAN_HT_SMPS_CONTROL_STATIC:
394 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
396 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
397 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
404 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
409 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
410 kfree(sta->tx_lat[i].bins);
417 static int sta_info_insert_check(struct sta_info *sta)
419 struct ieee80211_sub_if_data *sdata = sta->sdata;
422 * Can't be a WARN_ON because it can be triggered through a race:
423 * something inserts a STA (on one CPU) without holding the RTNL
424 * and another CPU turns off the net device.
426 if (unlikely(!ieee80211_sdata_running(sdata)))
429 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
430 is_multicast_ether_addr(sta->sta.addr)))
436 static int sta_info_insert_drv_state(struct ieee80211_local *local,
437 struct ieee80211_sub_if_data *sdata,
438 struct sta_info *sta)
440 enum ieee80211_sta_state state;
443 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
444 err = drv_sta_state(local, sdata, sta, state, state + 1);
451 * Drivers using legacy sta_add/sta_remove callbacks only
452 * get uploaded set to true after sta_add is called.
454 if (!local->ops->sta_add)
455 sta->uploaded = true;
459 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
461 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
462 sta->sta.addr, state + 1, err);
466 /* unwind on error */
467 for (; state > IEEE80211_STA_NOTEXIST; state--)
468 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
474 * should be called with sta_mtx locked
475 * this function replaces the mutex lock
478 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
480 struct ieee80211_local *local = sta->local;
481 struct ieee80211_sub_if_data *sdata = sta->sdata;
482 struct station_info sinfo;
485 lockdep_assert_held(&local->sta_mtx);
487 /* check if STA exists already */
488 if (sta_info_get_bss(sdata, sta->sta.addr)) {
494 local->sta_generation++;
497 /* simplify things and don't accept BA sessions yet */
498 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
500 /* make the station visible */
501 sta_info_hash_add(local, sta);
503 list_add_rcu(&sta->list, &local->sta_list);
506 err = sta_info_insert_drv_state(local, sdata, sta);
510 set_sta_flag(sta, WLAN_STA_INSERTED);
511 /* accept BA sessions now */
512 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
514 ieee80211_recalc_min_chandef(sdata);
515 ieee80211_sta_debugfs_add(sta);
516 rate_control_add_sta_debugfs(sta);
518 memset(&sinfo, 0, sizeof(sinfo));
520 sinfo.generation = local->sta_generation;
521 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
523 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
525 /* move reference to rcu-protected */
527 mutex_unlock(&local->sta_mtx);
529 if (ieee80211_vif_is_mesh(&sdata->vif))
530 mesh_accept_plinks_update(sdata);
534 sta_info_hash_del(local, sta);
535 list_del_rcu(&sta->list);
538 __cleanup_single_sta(sta);
540 mutex_unlock(&local->sta_mtx);
545 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
547 struct ieee80211_local *local = sta->local;
552 err = sta_info_insert_check(sta);
558 mutex_lock(&local->sta_mtx);
560 err = sta_info_insert_finish(sta);
566 sta_info_free(local, sta);
570 int sta_info_insert(struct sta_info *sta)
572 int err = sta_info_insert_rcu(sta);
579 static inline void __bss_tim_set(u8 *tim, u16 id)
582 * This format has been mandated by the IEEE specifications,
583 * so this line may not be changed to use the __set_bit() format.
585 tim[id / 8] |= (1 << (id % 8));
588 static inline void __bss_tim_clear(u8 *tim, u16 id)
591 * This format has been mandated by the IEEE specifications,
592 * so this line may not be changed to use the __clear_bit() format.
594 tim[id / 8] &= ~(1 << (id % 8));
597 static inline bool __bss_tim_get(u8 *tim, u16 id)
600 * This format has been mandated by the IEEE specifications,
601 * so this line may not be changed to use the test_bit() format.
603 return tim[id / 8] & (1 << (id % 8));
606 static unsigned long ieee80211_tids_for_ac(int ac)
608 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
610 case IEEE80211_AC_VO:
611 return BIT(6) | BIT(7);
612 case IEEE80211_AC_VI:
613 return BIT(4) | BIT(5);
614 case IEEE80211_AC_BE:
615 return BIT(0) | BIT(3);
616 case IEEE80211_AC_BK:
617 return BIT(1) | BIT(2);
624 void sta_info_recalc_tim(struct sta_info *sta)
626 struct ieee80211_local *local = sta->local;
628 bool indicate_tim = false;
629 u8 ignore_for_tim = sta->sta.uapsd_queues;
633 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
634 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
635 if (WARN_ON_ONCE(!sta->sdata->bss))
638 ps = &sta->sdata->bss->ps;
640 #ifdef CONFIG_MAC80211_MESH
641 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
642 ps = &sta->sdata->u.mesh.ps;
643 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
644 id = sta->plid % (IEEE80211_MAX_AID + 1);
650 /* No need to do anything if the driver does all */
651 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
658 * If all ACs are delivery-enabled then we should build
659 * the TIM bit for all ACs anyway; if only some are then
660 * we ignore those and build the TIM bit using only the
663 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
666 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
669 if (ignore_for_tim & BIT(ac))
672 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
673 !skb_queue_empty(&sta->ps_tx_buf[ac]);
677 tids = ieee80211_tids_for_ac(ac);
680 sta->driver_buffered_tids & tids;
684 spin_lock_bh(&local->tim_lock);
686 if (indicate_tim == __bss_tim_get(ps->tim, id))
690 __bss_tim_set(ps->tim, id);
692 __bss_tim_clear(ps->tim, id);
694 if (local->ops->set_tim) {
695 local->tim_in_locked_section = true;
696 drv_set_tim(local, &sta->sta, indicate_tim);
697 local->tim_in_locked_section = false;
701 spin_unlock_bh(&local->tim_lock);
704 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
706 struct ieee80211_tx_info *info;
712 info = IEEE80211_SKB_CB(skb);
714 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
715 timeout = (sta->listen_interval *
716 sta->sdata->vif.bss_conf.beacon_int *
718 if (timeout < STA_TX_BUFFER_EXPIRE)
719 timeout = STA_TX_BUFFER_EXPIRE;
720 return time_after(jiffies, info->control.jiffies + timeout);
724 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
725 struct sta_info *sta, int ac)
731 * First check for frames that should expire on the filtered
732 * queue. Frames here were rejected by the driver and are on
733 * a separate queue to avoid reordering with normal PS-buffered
734 * frames. They also aren't accounted for right now in the
735 * total_ps_buffered counter.
738 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
739 skb = skb_peek(&sta->tx_filtered[ac]);
740 if (sta_info_buffer_expired(sta, skb))
741 skb = __skb_dequeue(&sta->tx_filtered[ac]);
744 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
747 * Frames are queued in order, so if this one
748 * hasn't expired yet we can stop testing. If
749 * we actually reached the end of the queue we
750 * also need to stop, of course.
754 ieee80211_free_txskb(&local->hw, skb);
758 * Now also check the normal PS-buffered queue, this will
759 * only find something if the filtered queue was emptied
760 * since the filtered frames are all before the normal PS
764 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
765 skb = skb_peek(&sta->ps_tx_buf[ac]);
766 if (sta_info_buffer_expired(sta, skb))
767 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
770 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
773 * frames are queued in order, so if this one
774 * hasn't expired yet (or we reached the end of
775 * the queue) we can stop testing
780 local->total_ps_buffered--;
781 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
783 ieee80211_free_txskb(&local->hw, skb);
787 * Finally, recalculate the TIM bit for this station -- it might
788 * now be clear because the station was too slow to retrieve its
791 sta_info_recalc_tim(sta);
794 * Return whether there are any frames still buffered, this is
795 * used to check whether the cleanup timer still needs to run,
796 * if there are no frames we don't need to rearm the timer.
798 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
799 skb_queue_empty(&sta->tx_filtered[ac]));
802 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
803 struct sta_info *sta)
805 bool have_buffered = false;
808 /* This is only necessary for stations on BSS/MBSS interfaces */
809 if (!sta->sdata->bss &&
810 !ieee80211_vif_is_mesh(&sta->sdata->vif))
813 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
815 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
817 return have_buffered;
820 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
822 struct ieee80211_local *local;
823 struct ieee80211_sub_if_data *sdata;
834 lockdep_assert_held(&local->sta_mtx);
837 * Before removing the station from the driver and
838 * rate control, it might still start new aggregation
839 * sessions -- block that to make sure the tear-down
840 * will be sufficient.
842 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
843 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
845 ret = sta_info_hash_del(local, sta);
849 list_del_rcu(&sta->list);
851 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
853 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
854 rcu_access_pointer(sdata->u.vlan.sta) == sta)
855 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
860 static void __sta_info_destroy_part2(struct sta_info *sta)
862 struct ieee80211_local *local = sta->local;
863 struct ieee80211_sub_if_data *sdata = sta->sdata;
867 * NOTE: This assumes at least synchronize_net() was done
868 * after _part1 and before _part2!
872 lockdep_assert_held(&local->sta_mtx);
874 /* now keys can no longer be reached */
875 ieee80211_free_sta_keys(local, sta);
880 local->sta_generation++;
882 while (sta->sta_state > IEEE80211_STA_NONE) {
883 ret = sta_info_move_state(sta, sta->sta_state - 1);
891 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
892 IEEE80211_STA_NOTEXIST);
893 WARN_ON_ONCE(ret != 0);
896 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
898 cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL);
900 rate_control_remove_sta_debugfs(sta);
901 ieee80211_sta_debugfs_remove(sta);
902 ieee80211_recalc_min_chandef(sdata);
904 cleanup_single_sta(sta);
907 int __must_check __sta_info_destroy(struct sta_info *sta)
909 int err = __sta_info_destroy_part1(sta);
916 __sta_info_destroy_part2(sta);
921 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
923 struct sta_info *sta;
926 mutex_lock(&sdata->local->sta_mtx);
927 sta = sta_info_get(sdata, addr);
928 ret = __sta_info_destroy(sta);
929 mutex_unlock(&sdata->local->sta_mtx);
934 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
937 struct sta_info *sta;
940 mutex_lock(&sdata->local->sta_mtx);
941 sta = sta_info_get_bss(sdata, addr);
942 ret = __sta_info_destroy(sta);
943 mutex_unlock(&sdata->local->sta_mtx);
948 static void sta_info_cleanup(unsigned long data)
950 struct ieee80211_local *local = (struct ieee80211_local *) data;
951 struct sta_info *sta;
952 bool timer_needed = false;
955 list_for_each_entry_rcu(sta, &local->sta_list, list)
956 if (sta_info_cleanup_expire_buffered(local, sta))
960 if (local->quiescing)
966 mod_timer(&local->sta_cleanup,
967 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
970 void sta_info_init(struct ieee80211_local *local)
972 spin_lock_init(&local->tim_lock);
973 mutex_init(&local->sta_mtx);
974 INIT_LIST_HEAD(&local->sta_list);
976 setup_timer(&local->sta_cleanup, sta_info_cleanup,
977 (unsigned long)local);
980 void sta_info_stop(struct ieee80211_local *local)
982 del_timer_sync(&local->sta_cleanup);
986 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
988 struct ieee80211_local *local = sdata->local;
989 struct sta_info *sta, *tmp;
990 LIST_HEAD(free_list);
995 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
996 WARN_ON(vlans && !sdata->bss);
998 mutex_lock(&local->sta_mtx);
999 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1000 if (sdata == sta->sdata ||
1001 (vlans && sdata->bss == sta->sdata->bss)) {
1002 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1003 list_add(&sta->free_list, &free_list);
1008 if (!list_empty(&free_list)) {
1010 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1011 __sta_info_destroy_part2(sta);
1013 mutex_unlock(&local->sta_mtx);
1018 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1019 unsigned long exp_time)
1021 struct ieee80211_local *local = sdata->local;
1022 struct sta_info *sta, *tmp;
1024 mutex_lock(&local->sta_mtx);
1026 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1027 if (sdata != sta->sdata)
1030 if (time_after(jiffies, sta->last_rx + exp_time)) {
1031 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1034 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1035 test_sta_flag(sta, WLAN_STA_PS_STA))
1036 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1038 WARN_ON(__sta_info_destroy(sta));
1042 mutex_unlock(&local->sta_mtx);
1045 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1047 const u8 *localaddr)
1049 struct sta_info *sta, *nxt;
1052 * Just return a random station if localaddr is NULL
1053 * ... first in list.
1055 for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
1057 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1066 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1068 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1071 struct sta_info *sta;
1076 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1085 EXPORT_SYMBOL(ieee80211_find_sta);
1087 /* powersave support code */
1088 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1090 struct ieee80211_sub_if_data *sdata = sta->sdata;
1091 struct ieee80211_local *local = sdata->local;
1092 struct sk_buff_head pending;
1093 int filtered = 0, buffered = 0, ac;
1094 unsigned long flags;
1097 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1098 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1101 if (sdata->vif.type == NL80211_IFTYPE_AP)
1102 ps = &sdata->bss->ps;
1103 else if (ieee80211_vif_is_mesh(&sdata->vif))
1104 ps = &sdata->u.mesh.ps;
1108 clear_sta_flag(sta, WLAN_STA_SP);
1110 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1111 sta->driver_buffered_tids = 0;
1113 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1114 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1116 skb_queue_head_init(&pending);
1118 /* sync with ieee80211_tx_h_unicast_ps_buf */
1119 spin_lock(&sta->ps_lock);
1120 /* Send all buffered frames to the station */
1121 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1122 int count = skb_queue_len(&pending), tmp;
1124 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1125 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1126 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1127 tmp = skb_queue_len(&pending);
1128 filtered += tmp - count;
1131 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1132 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1133 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1134 tmp = skb_queue_len(&pending);
1135 buffered += tmp - count;
1138 ieee80211_add_pending_skbs(local, &pending);
1140 /* now we're no longer in the deliver code */
1141 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1143 /* The station might have polled and then woken up before we responded,
1144 * so clear these flags now to avoid them sticking around.
1146 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1147 clear_sta_flag(sta, WLAN_STA_UAPSD);
1148 spin_unlock(&sta->ps_lock);
1150 atomic_dec(&ps->num_sta_ps);
1152 /* This station just woke up and isn't aware of our SMPS state */
1153 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1154 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1155 sdata->smps_mode) &&
1156 sta->known_smps_mode != sdata->bss->req_smps &&
1157 sta_info_tx_streams(sta) != 1) {
1159 "%pM just woke up and MIMO capable - update SMPS\n",
1161 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1163 sdata->vif.bss_conf.bssid);
1166 local->total_ps_buffered -= buffered;
1168 sta_info_recalc_tim(sta);
1171 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1172 sta->sta.addr, sta->sta.aid, filtered, buffered);
1175 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
1176 struct sta_info *sta, int tid,
1177 enum ieee80211_frame_release_type reason,
1180 struct ieee80211_local *local = sdata->local;
1181 struct ieee80211_qos_hdr *nullfunc;
1182 struct sk_buff *skb;
1183 int size = sizeof(*nullfunc);
1185 bool qos = test_sta_flag(sta, WLAN_STA_WME);
1186 struct ieee80211_tx_info *info;
1187 struct ieee80211_chanctx_conf *chanctx_conf;
1190 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1191 IEEE80211_STYPE_QOS_NULLFUNC |
1192 IEEE80211_FCTL_FROMDS);
1195 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1196 IEEE80211_STYPE_NULLFUNC |
1197 IEEE80211_FCTL_FROMDS);
1200 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1204 skb_reserve(skb, local->hw.extra_tx_headroom);
1206 nullfunc = (void *) skb_put(skb, size);
1207 nullfunc->frame_control = fc;
1208 nullfunc->duration_id = 0;
1209 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1210 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1211 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1212 nullfunc->seq_ctrl = 0;
1214 skb->priority = tid;
1215 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1217 nullfunc->qos_ctrl = cpu_to_le16(tid);
1219 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1220 nullfunc->qos_ctrl |=
1221 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1224 info = IEEE80211_SKB_CB(skb);
1227 * Tell TX path to send this frame even though the
1228 * STA may still remain is PS mode after this frame
1229 * exchange. Also set EOSP to indicate this packet
1230 * ends the poll/service period.
1232 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1233 IEEE80211_TX_CTL_PS_RESPONSE |
1234 IEEE80211_TX_STATUS_EOSP |
1235 IEEE80211_TX_CTL_REQ_TX_STATUS;
1238 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1241 skb->dev = sdata->dev;
1244 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1245 if (WARN_ON(!chanctx_conf)) {
1251 ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band);
1255 static int find_highest_prio_tid(unsigned long tids)
1257 /* lower 3 TIDs aren't ordered perfectly */
1259 return fls(tids) - 1;
1260 /* TID 0 is BE just like TID 3 */
1263 return fls(tids) - 1;
1267 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1268 int n_frames, u8 ignored_acs,
1269 enum ieee80211_frame_release_type reason)
1271 struct ieee80211_sub_if_data *sdata = sta->sdata;
1272 struct ieee80211_local *local = sdata->local;
1273 bool more_data = false;
1275 unsigned long driver_release_tids = 0;
1276 struct sk_buff_head frames;
1278 /* Service or PS-Poll period starts */
1279 set_sta_flag(sta, WLAN_STA_SP);
1281 __skb_queue_head_init(&frames);
1283 /* Get response frame(s) and more data bit for the last one. */
1284 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1287 if (ignored_acs & BIT(ac))
1290 tids = ieee80211_tids_for_ac(ac);
1292 /* if we already have frames from software, then we can't also
1293 * release from hardware queues
1295 if (skb_queue_empty(&frames))
1296 driver_release_tids |= sta->driver_buffered_tids & tids;
1298 if (driver_release_tids) {
1299 /* If the driver has data on more than one TID then
1300 * certainly there's more data if we release just a
1301 * single frame now (from a single TID). This will
1302 * only happen for PS-Poll.
1304 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1305 hweight16(driver_release_tids) > 1) {
1307 driver_release_tids =
1308 BIT(find_highest_prio_tid(
1309 driver_release_tids));
1313 struct sk_buff *skb;
1315 while (n_frames > 0) {
1316 skb = skb_dequeue(&sta->tx_filtered[ac]);
1319 &sta->ps_tx_buf[ac]);
1321 local->total_ps_buffered--;
1326 __skb_queue_tail(&frames, skb);
1330 /* If we have more frames buffered on this AC, then set the
1331 * more-data bit and abort the loop since we can't send more
1332 * data from other ACs before the buffered frames from this.
1334 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1335 !skb_queue_empty(&sta->ps_tx_buf[ac])) {
1341 if (skb_queue_empty(&frames) && !driver_release_tids) {
1345 * For PS-Poll, this can only happen due to a race condition
1346 * when we set the TIM bit and the station notices it, but
1347 * before it can poll for the frame we expire it.
1349 * For uAPSD, this is said in the standard (11.2.1.5 h):
1350 * At each unscheduled SP for a non-AP STA, the AP shall
1351 * attempt to transmit at least one MSDU or MMPDU, but no
1352 * more than the value specified in the Max SP Length field
1353 * in the QoS Capability element from delivery-enabled ACs,
1354 * that are destined for the non-AP STA.
1356 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1359 /* This will evaluate to 1, 3, 5 or 7. */
1360 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1362 ieee80211_send_null_response(sdata, sta, tid, reason, true);
1363 } else if (!driver_release_tids) {
1364 struct sk_buff_head pending;
1365 struct sk_buff *skb;
1368 bool need_null = false;
1370 skb_queue_head_init(&pending);
1372 while ((skb = __skb_dequeue(&frames))) {
1373 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1374 struct ieee80211_hdr *hdr = (void *) skb->data;
1380 * Tell TX path to send this frame even though the
1381 * STA may still remain is PS mode after this frame
1384 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1385 IEEE80211_TX_CTL_PS_RESPONSE;
1388 * Use MoreData flag to indicate whether there are
1389 * more buffered frames for this STA
1391 if (more_data || !skb_queue_empty(&frames))
1392 hdr->frame_control |=
1393 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1395 hdr->frame_control &=
1396 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1398 if (ieee80211_is_data_qos(hdr->frame_control) ||
1399 ieee80211_is_qos_nullfunc(hdr->frame_control))
1400 qoshdr = ieee80211_get_qos_ctl(hdr);
1402 tids |= BIT(skb->priority);
1404 __skb_queue_tail(&pending, skb);
1406 /* end service period after last frame or add one */
1407 if (!skb_queue_empty(&frames))
1410 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1411 /* for PS-Poll, there's only one frame */
1412 info->flags |= IEEE80211_TX_STATUS_EOSP |
1413 IEEE80211_TX_CTL_REQ_TX_STATUS;
1417 /* For uAPSD, things are a bit more complicated. If the
1418 * last frame has a QoS header (i.e. is a QoS-data or
1419 * QoS-nulldata frame) then just set the EOSP bit there
1421 * If the frame doesn't have a QoS header (which means
1422 * it should be a bufferable MMPDU) then we can't set
1423 * the EOSP bit in the QoS header; add a QoS-nulldata
1424 * frame to the list to send it after the MMPDU.
1426 * Note that this code is only in the mac80211-release
1427 * code path, we assume that the driver will not buffer
1428 * anything but QoS-data frames, or if it does, will
1429 * create the QoS-nulldata frame by itself if needed.
1431 * Cf. 802.11-2012 10.2.1.10 (c).
1434 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1436 info->flags |= IEEE80211_TX_STATUS_EOSP |
1437 IEEE80211_TX_CTL_REQ_TX_STATUS;
1439 /* The standard isn't completely clear on this
1440 * as it says the more-data bit should be set
1441 * if there are more BUs. The QoS-Null frame
1442 * we're about to send isn't buffered yet, we
1443 * only create it below, but let's pretend it
1444 * was buffered just in case some clients only
1445 * expect more-data=0 when eosp=1.
1447 hdr->frame_control |=
1448 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1455 drv_allow_buffered_frames(local, sta, tids, num,
1458 ieee80211_add_pending_skbs(local, &pending);
1461 ieee80211_send_null_response(
1462 sdata, sta, find_highest_prio_tid(tids),
1465 sta_info_recalc_tim(sta);
1468 * We need to release a frame that is buffered somewhere in the
1469 * driver ... it'll have to handle that.
1470 * Note that the driver also has to check the number of frames
1471 * on the TIDs we're releasing from - if there are more than
1472 * n_frames it has to set the more-data bit (if we didn't ask
1473 * it to set it anyway due to other buffered frames); if there
1474 * are fewer than n_frames it has to make sure to adjust that
1475 * to allow the service period to end properly.
1477 drv_release_buffered_frames(local, sta, driver_release_tids,
1478 n_frames, reason, more_data);
1481 * Note that we don't recalculate the TIM bit here as it would
1482 * most likely have no effect at all unless the driver told us
1483 * that the TID(s) became empty before returning here from the
1485 * Either way, however, when the driver tells us that the TID(s)
1486 * became empty we'll do the TIM recalculation.
1491 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1493 u8 ignore_for_response = sta->sta.uapsd_queues;
1496 * If all ACs are delivery-enabled then we should reply
1497 * from any of them, if only some are enabled we reply
1498 * only from the non-enabled ones.
1500 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1501 ignore_for_response = 0;
1503 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1504 IEEE80211_FRAME_RELEASE_PSPOLL);
1507 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1509 int n_frames = sta->sta.max_sp;
1510 u8 delivery_enabled = sta->sta.uapsd_queues;
1513 * If we ever grow support for TSPEC this might happen if
1514 * the TSPEC update from hostapd comes in between a trigger
1515 * frame setting WLAN_STA_UAPSD in the RX path and this
1516 * actually getting called.
1518 if (!delivery_enabled)
1521 switch (sta->sta.max_sp) {
1532 /* XXX: what is a good value? */
1537 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1538 IEEE80211_FRAME_RELEASE_UAPSD);
1541 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1542 struct ieee80211_sta *pubsta, bool block)
1544 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1546 trace_api_sta_block_awake(sta->local, pubsta, block);
1549 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1553 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1556 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1557 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1558 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1559 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1560 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1561 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1562 /* must be asleep in this case */
1563 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1564 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1566 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1569 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1571 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1573 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1574 struct ieee80211_local *local = sta->local;
1576 trace_api_eosp(local, pubsta);
1578 clear_sta_flag(sta, WLAN_STA_SP);
1580 EXPORT_SYMBOL(ieee80211_sta_eosp);
1582 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1583 u8 tid, bool buffered)
1585 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1587 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1590 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1593 set_bit(tid, &sta->driver_buffered_tids);
1595 clear_bit(tid, &sta->driver_buffered_tids);
1597 sta_info_recalc_tim(sta);
1599 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1601 int sta_info_move_state(struct sta_info *sta,
1602 enum ieee80211_sta_state new_state)
1606 if (sta->sta_state == new_state)
1609 /* check allowed transitions first */
1611 switch (new_state) {
1612 case IEEE80211_STA_NONE:
1613 if (sta->sta_state != IEEE80211_STA_AUTH)
1616 case IEEE80211_STA_AUTH:
1617 if (sta->sta_state != IEEE80211_STA_NONE &&
1618 sta->sta_state != IEEE80211_STA_ASSOC)
1621 case IEEE80211_STA_ASSOC:
1622 if (sta->sta_state != IEEE80211_STA_AUTH &&
1623 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1626 case IEEE80211_STA_AUTHORIZED:
1627 if (sta->sta_state != IEEE80211_STA_ASSOC)
1631 WARN(1, "invalid state %d", new_state);
1635 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1636 sta->sta.addr, new_state);
1639 * notify the driver before the actual changes so it can
1640 * fail the transition
1642 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1643 int err = drv_sta_state(sta->local, sta->sdata, sta,
1644 sta->sta_state, new_state);
1649 /* reflect the change in all state variables */
1651 switch (new_state) {
1652 case IEEE80211_STA_NONE:
1653 if (sta->sta_state == IEEE80211_STA_AUTH)
1654 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1656 case IEEE80211_STA_AUTH:
1657 if (sta->sta_state == IEEE80211_STA_NONE)
1658 set_bit(WLAN_STA_AUTH, &sta->_flags);
1659 else if (sta->sta_state == IEEE80211_STA_ASSOC)
1660 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1662 case IEEE80211_STA_ASSOC:
1663 if (sta->sta_state == IEEE80211_STA_AUTH) {
1664 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1665 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1666 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1667 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1668 !sta->sdata->u.vlan.sta))
1669 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1670 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1673 case IEEE80211_STA_AUTHORIZED:
1674 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1675 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1676 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1677 !sta->sdata->u.vlan.sta))
1678 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1679 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1686 sta->sta_state = new_state;
1691 u8 sta_info_tx_streams(struct sta_info *sta)
1693 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1696 if (!sta->sta.ht_cap.ht_supported)
1699 if (sta->sta.vht_cap.vht_supported) {
1702 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1704 for (i = 7; i >= 0; i--)
1705 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1706 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1710 if (ht_cap->mcs.rx_mask[3])
1712 else if (ht_cap->mcs.rx_mask[2])
1714 else if (ht_cap->mcs.rx_mask[1])
1719 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1722 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1723 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1726 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
1728 struct ieee80211_sub_if_data *sdata = sta->sdata;
1729 struct ieee80211_local *local = sdata->local;
1730 struct rate_control_ref *ref = NULL;
1731 struct timespec uptime;
1736 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
1737 ref = local->rate_ctrl;
1739 sinfo->generation = sdata->local->sta_generation;
1741 sinfo->filled = STATION_INFO_INACTIVE_TIME |
1742 STATION_INFO_RX_BYTES64 |
1743 STATION_INFO_TX_BYTES64 |
1744 STATION_INFO_RX_PACKETS |
1745 STATION_INFO_TX_PACKETS |
1746 STATION_INFO_TX_RETRIES |
1747 STATION_INFO_TX_FAILED |
1748 STATION_INFO_TX_BITRATE |
1749 STATION_INFO_RX_BITRATE |
1750 STATION_INFO_RX_DROP_MISC |
1751 STATION_INFO_BSS_PARAM |
1752 STATION_INFO_CONNECTED_TIME |
1753 STATION_INFO_STA_FLAGS |
1754 STATION_INFO_BEACON_LOSS_COUNT;
1756 ktime_get_ts(&uptime);
1757 sinfo->connected_time = uptime.tv_sec - sta->last_connected;
1759 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
1760 sinfo->tx_bytes = 0;
1761 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1762 sinfo->tx_bytes += sta->tx_bytes[ac];
1763 packets += sta->tx_packets[ac];
1765 sinfo->tx_packets = packets;
1766 sinfo->rx_bytes = sta->rx_bytes;
1767 sinfo->rx_packets = sta->rx_packets;
1768 sinfo->tx_retries = sta->tx_retry_count;
1769 sinfo->tx_failed = sta->tx_retry_failed;
1770 sinfo->rx_dropped_misc = sta->rx_dropped;
1771 sinfo->beacon_loss_count = sta->beacon_loss_count;
1773 if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
1774 (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
1775 sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;
1776 if (!local->ops->get_rssi ||
1777 drv_get_rssi(local, sdata, &sta->sta, &sinfo->signal))
1778 sinfo->signal = (s8)sta->last_signal;
1779 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
1782 sinfo->filled |= STATION_INFO_CHAIN_SIGNAL |
1783 STATION_INFO_CHAIN_SIGNAL_AVG;
1785 sinfo->chains = sta->chains;
1786 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
1787 sinfo->chain_signal[i] = sta->chain_signal_last[i];
1788 sinfo->chain_signal_avg[i] =
1789 (s8) -ewma_read(&sta->chain_signal_avg[i]);
1793 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
1794 sta_set_rate_info_rx(sta, &sinfo->rxrate);
1796 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1797 #ifdef CONFIG_MAC80211_MESH
1798 sinfo->filled |= STATION_INFO_LLID |
1800 STATION_INFO_PLINK_STATE |
1801 STATION_INFO_LOCAL_PM |
1802 STATION_INFO_PEER_PM |
1803 STATION_INFO_NONPEER_PM;
1805 sinfo->llid = sta->llid;
1806 sinfo->plid = sta->plid;
1807 sinfo->plink_state = sta->plink_state;
1808 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
1809 sinfo->filled |= STATION_INFO_T_OFFSET;
1810 sinfo->t_offset = sta->t_offset;
1812 sinfo->local_pm = sta->local_pm;
1813 sinfo->peer_pm = sta->peer_pm;
1814 sinfo->nonpeer_pm = sta->nonpeer_pm;
1818 sinfo->bss_param.flags = 0;
1819 if (sdata->vif.bss_conf.use_cts_prot)
1820 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
1821 if (sdata->vif.bss_conf.use_short_preamble)
1822 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
1823 if (sdata->vif.bss_conf.use_short_slot)
1824 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
1825 sinfo->bss_param.dtim_period = sdata->local->hw.conf.ps_dtim_period;
1826 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
1828 sinfo->sta_flags.set = 0;
1829 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
1830 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
1831 BIT(NL80211_STA_FLAG_WME) |
1832 BIT(NL80211_STA_FLAG_MFP) |
1833 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1834 BIT(NL80211_STA_FLAG_ASSOCIATED) |
1835 BIT(NL80211_STA_FLAG_TDLS_PEER);
1836 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1837 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
1838 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
1839 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
1840 if (test_sta_flag(sta, WLAN_STA_WME))
1841 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
1842 if (test_sta_flag(sta, WLAN_STA_MFP))
1843 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
1844 if (test_sta_flag(sta, WLAN_STA_AUTH))
1845 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
1846 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1847 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1848 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1849 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
1851 /* check if the driver has a SW RC implementation */
1852 if (ref && ref->ops->get_expected_throughput)
1853 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
1855 thr = drv_get_expected_throughput(local, &sta->sta);
1858 sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT;
1859 sinfo->expected_throughput = thr;