2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/timer.h>
20 #include <linux/rtnetlink.h>
22 #include <net/mac80211.h>
23 #include "ieee80211_i.h"
24 #include "driver-ops.h"
27 #include "debugfs_sta.h"
32 * DOC: STA information lifetime rules
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.
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
47 * When the insertion fails (sta_info_insert()) returns non-zero), the
48 * structure will have been freed by sta_info_insert()!
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.
58 * In order to remove a STA info structure, various sta_info_destroy_*()
59 * calls are available.
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.
67 static const struct rhashtable_params sta_rht_params = {
68 .nelem_hint = 3, /* start small */
69 .head_offset = offsetof(struct sta_info, hash_node),
70 .key_offset = offsetof(struct sta_info, sta.addr),
72 .hashfn = sta_addr_hash,
75 /* Caller must hold local->sta_mtx */
76 static int sta_info_hash_del(struct ieee80211_local *local,
79 return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node,
83 static void __cleanup_single_sta(struct sta_info *sta)
86 struct tid_ampdu_tx *tid_tx;
87 struct ieee80211_sub_if_data *sdata = sta->sdata;
88 struct ieee80211_local *local = sdata->local;
91 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
92 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
93 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
94 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
95 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
97 else if (ieee80211_vif_is_mesh(&sdata->vif))
98 ps = &sdata->u.mesh.ps;
102 clear_sta_flag(sta, WLAN_STA_PS_STA);
103 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
104 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
106 atomic_dec(&ps->num_sta_ps);
109 if (sta->sta.txq[0]) {
110 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
111 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
112 int n = skb_queue_len(&txqi->queue);
114 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
115 atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]);
119 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
120 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
121 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
122 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
125 if (ieee80211_vif_is_mesh(&sdata->vif))
126 mesh_sta_cleanup(sta);
128 cancel_work_sync(&sta->drv_deliver_wk);
131 * Destroy aggregation state here. It would be nice to wait for the
132 * driver to finish aggregation stop and then clean up, but for now
133 * drivers have to handle aggregation stop being requested, followed
134 * directly by station destruction.
136 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
137 kfree(sta->ampdu_mlme.tid_start_tx[i]);
138 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
141 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
146 static void cleanup_single_sta(struct sta_info *sta)
148 struct ieee80211_sub_if_data *sdata = sta->sdata;
149 struct ieee80211_local *local = sdata->local;
151 __cleanup_single_sta(sta);
152 sta_info_free(local, sta);
155 /* protected by RCU */
156 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
159 struct ieee80211_local *local = sdata->local;
161 return rhashtable_lookup_fast(&local->sta_hash, addr, sta_rht_params);
165 * Get sta info either from the specified interface
166 * or from one of its vlans
168 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
171 struct ieee80211_local *local = sdata->local;
172 struct sta_info *sta;
173 struct rhash_head *tmp;
174 const struct bucket_table *tbl;
177 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
179 for_each_sta_info(local, tbl, addr, sta, tmp) {
180 if (sta->sdata == sdata ||
181 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
183 /* this is safe as the caller must already hold
184 * another rcu read section or the mutex
193 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
196 struct ieee80211_local *local = sdata->local;
197 struct sta_info *sta;
200 list_for_each_entry_rcu(sta, &local->sta_list, list) {
201 if (sdata != sta->sdata)
214 * sta_info_free - free STA
216 * @local: pointer to the global information
217 * @sta: STA info to free
219 * This function must undo everything done by sta_info_alloc()
220 * that may happen before sta_info_insert(). It may only be
221 * called when sta_info_insert() has not been attempted (and
222 * if that fails, the station is freed anyway.)
224 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
227 rate_control_free_sta(sta);
229 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
232 kfree(to_txq_info(sta->sta.txq[0]));
233 kfree(rcu_dereference_raw(sta->sta.rates));
237 /* Caller must hold local->sta_mtx */
238 static void sta_info_hash_add(struct ieee80211_local *local,
239 struct sta_info *sta)
241 rhashtable_insert_fast(&local->sta_hash, &sta->hash_node,
245 static void sta_deliver_ps_frames(struct work_struct *wk)
247 struct sta_info *sta;
249 sta = container_of(wk, struct sta_info, drv_deliver_wk);
255 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
256 ieee80211_sta_ps_deliver_wakeup(sta);
257 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
258 ieee80211_sta_ps_deliver_poll_response(sta);
259 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
260 ieee80211_sta_ps_deliver_uapsd(sta);
264 static int sta_prepare_rate_control(struct ieee80211_local *local,
265 struct sta_info *sta, gfp_t gfp)
267 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
270 sta->rate_ctrl = local->rate_ctrl;
271 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
273 if (!sta->rate_ctrl_priv)
279 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
280 const u8 *addr, gfp_t gfp)
282 struct ieee80211_local *local = sdata->local;
283 struct ieee80211_hw *hw = &local->hw;
284 struct sta_info *sta;
285 struct timespec uptime;
288 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
292 spin_lock_init(&sta->lock);
293 spin_lock_init(&sta->ps_lock);
294 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
295 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
296 mutex_init(&sta->ampdu_mlme.mtx);
297 #ifdef CONFIG_MAC80211_MESH
298 if (ieee80211_vif_is_mesh(&sdata->vif) &&
299 !sdata->u.mesh.user_mpm)
300 init_timer(&sta->plink_timer);
301 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
304 memcpy(sta->sta.addr, addr, ETH_ALEN);
307 sta->last_rx = jiffies;
309 sta->sta_state = IEEE80211_STA_NONE;
311 /* Mark TID as unreserved */
312 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
314 ktime_get_ts(&uptime);
315 sta->last_connected = uptime.tv_sec;
316 ewma_init(&sta->avg_signal, 1024, 8);
317 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
318 ewma_init(&sta->chain_signal_avg[i], 1024, 8);
320 if (local->ops->wake_tx_queue) {
322 int size = sizeof(struct txq_info) +
323 ALIGN(hw->txq_data_size, sizeof(void *));
325 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
329 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
330 struct txq_info *txq = txq_data + i * size;
332 ieee80211_init_tx_queue(sdata, sta, txq, i);
336 if (sta_prepare_rate_control(local, sta, gfp))
339 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
341 * timer_to_tid must be initialized with identity mapping
342 * to enable session_timer's data differentiation. See
343 * sta_rx_agg_session_timer_expired for usage.
345 sta->timer_to_tid[i] = i;
347 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
348 skb_queue_head_init(&sta->ps_tx_buf[i]);
349 skb_queue_head_init(&sta->tx_filtered[i]);
352 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
353 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
355 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
356 if (sdata->vif.type == NL80211_IFTYPE_AP ||
357 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
358 struct ieee80211_supported_band *sband =
359 hw->wiphy->bands[ieee80211_get_sdata_band(sdata)];
360 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
361 IEEE80211_HT_CAP_SM_PS_SHIFT;
363 * Assume that hostapd advertises our caps in the beacon and
364 * this is the known_smps_mode for a station that just assciated
367 case WLAN_HT_SMPS_CONTROL_DISABLED:
368 sta->known_smps_mode = IEEE80211_SMPS_OFF;
370 case WLAN_HT_SMPS_CONTROL_STATIC:
371 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
373 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
374 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
381 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
387 kfree(to_txq_info(sta->sta.txq[0]));
393 static int sta_info_insert_check(struct sta_info *sta)
395 struct ieee80211_sub_if_data *sdata = sta->sdata;
398 * Can't be a WARN_ON because it can be triggered through a race:
399 * something inserts a STA (on one CPU) without holding the RTNL
400 * and another CPU turns off the net device.
402 if (unlikely(!ieee80211_sdata_running(sdata)))
405 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
406 is_multicast_ether_addr(sta->sta.addr)))
412 static int sta_info_insert_drv_state(struct ieee80211_local *local,
413 struct ieee80211_sub_if_data *sdata,
414 struct sta_info *sta)
416 enum ieee80211_sta_state state;
419 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
420 err = drv_sta_state(local, sdata, sta, state, state + 1);
427 * Drivers using legacy sta_add/sta_remove callbacks only
428 * get uploaded set to true after sta_add is called.
430 if (!local->ops->sta_add)
431 sta->uploaded = true;
435 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
437 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
438 sta->sta.addr, state + 1, err);
442 /* unwind on error */
443 for (; state > IEEE80211_STA_NOTEXIST; state--)
444 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
450 * should be called with sta_mtx locked
451 * this function replaces the mutex lock
454 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
456 struct ieee80211_local *local = sta->local;
457 struct ieee80211_sub_if_data *sdata = sta->sdata;
458 struct station_info sinfo;
461 lockdep_assert_held(&local->sta_mtx);
463 /* check if STA exists already */
464 if (sta_info_get_bss(sdata, sta->sta.addr)) {
470 local->sta_generation++;
473 /* simplify things and don't accept BA sessions yet */
474 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
476 /* make the station visible */
477 sta_info_hash_add(local, sta);
479 list_add_tail_rcu(&sta->list, &local->sta_list);
482 err = sta_info_insert_drv_state(local, sdata, sta);
486 set_sta_flag(sta, WLAN_STA_INSERTED);
487 /* accept BA sessions now */
488 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
490 ieee80211_recalc_min_chandef(sdata);
491 ieee80211_sta_debugfs_add(sta);
492 rate_control_add_sta_debugfs(sta);
494 memset(&sinfo, 0, sizeof(sinfo));
496 sinfo.generation = local->sta_generation;
497 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
499 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
501 /* move reference to rcu-protected */
503 mutex_unlock(&local->sta_mtx);
505 if (ieee80211_vif_is_mesh(&sdata->vif))
506 mesh_accept_plinks_update(sdata);
510 sta_info_hash_del(local, sta);
511 list_del_rcu(&sta->list);
514 __cleanup_single_sta(sta);
516 mutex_unlock(&local->sta_mtx);
521 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
523 struct ieee80211_local *local = sta->local;
528 err = sta_info_insert_check(sta);
534 mutex_lock(&local->sta_mtx);
536 err = sta_info_insert_finish(sta);
542 sta_info_free(local, sta);
546 int sta_info_insert(struct sta_info *sta)
548 int err = sta_info_insert_rcu(sta);
555 static inline void __bss_tim_set(u8 *tim, u16 id)
558 * This format has been mandated by the IEEE specifications,
559 * so this line may not be changed to use the __set_bit() format.
561 tim[id / 8] |= (1 << (id % 8));
564 static inline void __bss_tim_clear(u8 *tim, u16 id)
567 * This format has been mandated by the IEEE specifications,
568 * so this line may not be changed to use the __clear_bit() format.
570 tim[id / 8] &= ~(1 << (id % 8));
573 static inline bool __bss_tim_get(u8 *tim, u16 id)
576 * This format has been mandated by the IEEE specifications,
577 * so this line may not be changed to use the test_bit() format.
579 return tim[id / 8] & (1 << (id % 8));
582 static unsigned long ieee80211_tids_for_ac(int ac)
584 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
586 case IEEE80211_AC_VO:
587 return BIT(6) | BIT(7);
588 case IEEE80211_AC_VI:
589 return BIT(4) | BIT(5);
590 case IEEE80211_AC_BE:
591 return BIT(0) | BIT(3);
592 case IEEE80211_AC_BK:
593 return BIT(1) | BIT(2);
600 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
602 struct ieee80211_local *local = sta->local;
604 bool indicate_tim = false;
605 u8 ignore_for_tim = sta->sta.uapsd_queues;
609 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
610 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
611 if (WARN_ON_ONCE(!sta->sdata->bss))
614 ps = &sta->sdata->bss->ps;
616 #ifdef CONFIG_MAC80211_MESH
617 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
618 ps = &sta->sdata->u.mesh.ps;
619 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
620 id = sta->plid % (IEEE80211_MAX_AID + 1);
626 /* No need to do anything if the driver does all */
627 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
634 * If all ACs are delivery-enabled then we should build
635 * the TIM bit for all ACs anyway; if only some are then
636 * we ignore those and build the TIM bit using only the
639 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
643 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
645 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
648 if (ignore_for_tim & BIT(ac))
651 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
652 !skb_queue_empty(&sta->ps_tx_buf[ac]);
656 tids = ieee80211_tids_for_ac(ac);
659 sta->driver_buffered_tids & tids;
661 sta->txq_buffered_tids & tids;
665 spin_lock_bh(&local->tim_lock);
667 if (indicate_tim == __bss_tim_get(ps->tim, id))
671 __bss_tim_set(ps->tim, id);
673 __bss_tim_clear(ps->tim, id);
675 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
676 local->tim_in_locked_section = true;
677 drv_set_tim(local, &sta->sta, indicate_tim);
678 local->tim_in_locked_section = false;
682 spin_unlock_bh(&local->tim_lock);
685 void sta_info_recalc_tim(struct sta_info *sta)
687 __sta_info_recalc_tim(sta, false);
690 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
692 struct ieee80211_tx_info *info;
698 info = IEEE80211_SKB_CB(skb);
700 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
701 timeout = (sta->listen_interval *
702 sta->sdata->vif.bss_conf.beacon_int *
704 if (timeout < STA_TX_BUFFER_EXPIRE)
705 timeout = STA_TX_BUFFER_EXPIRE;
706 return time_after(jiffies, info->control.jiffies + timeout);
710 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
711 struct sta_info *sta, int ac)
717 * First check for frames that should expire on the filtered
718 * queue. Frames here were rejected by the driver and are on
719 * a separate queue to avoid reordering with normal PS-buffered
720 * frames. They also aren't accounted for right now in the
721 * total_ps_buffered counter.
724 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
725 skb = skb_peek(&sta->tx_filtered[ac]);
726 if (sta_info_buffer_expired(sta, skb))
727 skb = __skb_dequeue(&sta->tx_filtered[ac]);
730 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
733 * Frames are queued in order, so if this one
734 * hasn't expired yet we can stop testing. If
735 * we actually reached the end of the queue we
736 * also need to stop, of course.
740 ieee80211_free_txskb(&local->hw, skb);
744 * Now also check the normal PS-buffered queue, this will
745 * only find something if the filtered queue was emptied
746 * since the filtered frames are all before the normal PS
750 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
751 skb = skb_peek(&sta->ps_tx_buf[ac]);
752 if (sta_info_buffer_expired(sta, skb))
753 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
756 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
759 * frames are queued in order, so if this one
760 * hasn't expired yet (or we reached the end of
761 * the queue) we can stop testing
766 local->total_ps_buffered--;
767 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
769 ieee80211_free_txskb(&local->hw, skb);
773 * Finally, recalculate the TIM bit for this station -- it might
774 * now be clear because the station was too slow to retrieve its
777 sta_info_recalc_tim(sta);
780 * Return whether there are any frames still buffered, this is
781 * used to check whether the cleanup timer still needs to run,
782 * if there are no frames we don't need to rearm the timer.
784 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
785 skb_queue_empty(&sta->tx_filtered[ac]));
788 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
789 struct sta_info *sta)
791 bool have_buffered = false;
794 /* This is only necessary for stations on BSS/MBSS interfaces */
795 if (!sta->sdata->bss &&
796 !ieee80211_vif_is_mesh(&sta->sdata->vif))
799 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
801 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
803 return have_buffered;
806 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
808 struct ieee80211_local *local;
809 struct ieee80211_sub_if_data *sdata;
820 lockdep_assert_held(&local->sta_mtx);
823 * Before removing the station from the driver and
824 * rate control, it might still start new aggregation
825 * sessions -- block that to make sure the tear-down
826 * will be sufficient.
828 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
829 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
831 ret = sta_info_hash_del(local, sta);
836 * for TDLS peers, make sure to return to the base channel before
839 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
840 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
841 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
844 list_del_rcu(&sta->list);
846 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
848 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
849 rcu_access_pointer(sdata->u.vlan.sta) == sta)
850 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
855 static void __sta_info_destroy_part2(struct sta_info *sta)
857 struct ieee80211_local *local = sta->local;
858 struct ieee80211_sub_if_data *sdata = sta->sdata;
859 struct station_info sinfo = {};
863 * NOTE: This assumes at least synchronize_net() was done
864 * after _part1 and before _part2!
868 lockdep_assert_held(&local->sta_mtx);
870 /* now keys can no longer be reached */
871 ieee80211_free_sta_keys(local, sta);
873 /* disable TIM bit - last chance to tell driver */
874 __sta_info_recalc_tim(sta, true);
879 local->sta_generation++;
881 while (sta->sta_state > IEEE80211_STA_NONE) {
882 ret = sta_info_move_state(sta, sta->sta_state - 1);
890 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
891 IEEE80211_STA_NOTEXIST);
892 WARN_ON_ONCE(ret != 0);
895 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
897 sta_set_sinfo(sta, &sinfo);
898 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, &sinfo, 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 u32 sta_addr_hash(const void *key, u32 length, u32 seed)
972 return jhash(key, ETH_ALEN, seed);
975 int sta_info_init(struct ieee80211_local *local)
979 err = rhashtable_init(&local->sta_hash, &sta_rht_params);
983 spin_lock_init(&local->tim_lock);
984 mutex_init(&local->sta_mtx);
985 INIT_LIST_HEAD(&local->sta_list);
987 setup_timer(&local->sta_cleanup, sta_info_cleanup,
988 (unsigned long)local);
992 void sta_info_stop(struct ieee80211_local *local)
994 del_timer_sync(&local->sta_cleanup);
995 rhashtable_destroy(&local->sta_hash);
999 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1001 struct ieee80211_local *local = sdata->local;
1002 struct sta_info *sta, *tmp;
1003 LIST_HEAD(free_list);
1008 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1009 WARN_ON(vlans && !sdata->bss);
1011 mutex_lock(&local->sta_mtx);
1012 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1013 if (sdata == sta->sdata ||
1014 (vlans && sdata->bss == sta->sdata->bss)) {
1015 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1016 list_add(&sta->free_list, &free_list);
1021 if (!list_empty(&free_list)) {
1023 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1024 __sta_info_destroy_part2(sta);
1026 mutex_unlock(&local->sta_mtx);
1031 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1032 unsigned long exp_time)
1034 struct ieee80211_local *local = sdata->local;
1035 struct sta_info *sta, *tmp;
1037 mutex_lock(&local->sta_mtx);
1039 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1040 if (sdata != sta->sdata)
1043 if (time_after(jiffies, sta->last_rx + exp_time)) {
1044 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1047 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1048 test_sta_flag(sta, WLAN_STA_PS_STA))
1049 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1051 WARN_ON(__sta_info_destroy(sta));
1055 mutex_unlock(&local->sta_mtx);
1058 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1060 const u8 *localaddr)
1062 struct ieee80211_local *local = hw_to_local(hw);
1063 struct sta_info *sta;
1064 struct rhash_head *tmp;
1065 const struct bucket_table *tbl;
1067 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
1070 * Just return a random station if localaddr is NULL
1071 * ... first in list.
1073 for_each_sta_info(local, tbl, addr, sta, tmp) {
1075 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1084 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1086 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1089 struct sta_info *sta;
1094 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1103 EXPORT_SYMBOL(ieee80211_find_sta);
1105 /* powersave support code */
1106 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1108 struct ieee80211_sub_if_data *sdata = sta->sdata;
1109 struct ieee80211_local *local = sdata->local;
1110 struct sk_buff_head pending;
1111 int filtered = 0, buffered = 0, ac, i;
1112 unsigned long flags;
1115 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1116 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1119 if (sdata->vif.type == NL80211_IFTYPE_AP)
1120 ps = &sdata->bss->ps;
1121 else if (ieee80211_vif_is_mesh(&sdata->vif))
1122 ps = &sdata->u.mesh.ps;
1126 clear_sta_flag(sta, WLAN_STA_SP);
1128 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1129 sta->driver_buffered_tids = 0;
1130 sta->txq_buffered_tids = 0;
1132 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1133 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1135 if (sta->sta.txq[0]) {
1136 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1137 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
1139 if (!skb_queue_len(&txqi->queue))
1142 drv_wake_tx_queue(local, txqi);
1146 skb_queue_head_init(&pending);
1148 /* sync with ieee80211_tx_h_unicast_ps_buf */
1149 spin_lock(&sta->ps_lock);
1150 /* Send all buffered frames to the station */
1151 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1152 int count = skb_queue_len(&pending), tmp;
1154 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1155 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1156 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1157 tmp = skb_queue_len(&pending);
1158 filtered += tmp - count;
1161 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1162 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1163 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1164 tmp = skb_queue_len(&pending);
1165 buffered += tmp - count;
1168 ieee80211_add_pending_skbs(local, &pending);
1170 /* now we're no longer in the deliver code */
1171 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1173 /* The station might have polled and then woken up before we responded,
1174 * so clear these flags now to avoid them sticking around.
1176 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1177 clear_sta_flag(sta, WLAN_STA_UAPSD);
1178 spin_unlock(&sta->ps_lock);
1180 atomic_dec(&ps->num_sta_ps);
1182 /* This station just woke up and isn't aware of our SMPS state */
1183 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1184 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1185 sdata->smps_mode) &&
1186 sta->known_smps_mode != sdata->bss->req_smps &&
1187 sta_info_tx_streams(sta) != 1) {
1189 "%pM just woke up and MIMO capable - update SMPS\n",
1191 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1193 sdata->vif.bss_conf.bssid);
1196 local->total_ps_buffered -= buffered;
1198 sta_info_recalc_tim(sta);
1201 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1202 sta->sta.addr, sta->sta.aid, filtered, buffered);
1205 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
1206 struct sta_info *sta, int tid,
1207 enum ieee80211_frame_release_type reason,
1210 struct ieee80211_local *local = sdata->local;
1211 struct ieee80211_qos_hdr *nullfunc;
1212 struct sk_buff *skb;
1213 int size = sizeof(*nullfunc);
1215 bool qos = sta->sta.wme;
1216 struct ieee80211_tx_info *info;
1217 struct ieee80211_chanctx_conf *chanctx_conf;
1220 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1221 IEEE80211_STYPE_QOS_NULLFUNC |
1222 IEEE80211_FCTL_FROMDS);
1225 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1226 IEEE80211_STYPE_NULLFUNC |
1227 IEEE80211_FCTL_FROMDS);
1230 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1234 skb_reserve(skb, local->hw.extra_tx_headroom);
1236 nullfunc = (void *) skb_put(skb, size);
1237 nullfunc->frame_control = fc;
1238 nullfunc->duration_id = 0;
1239 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1240 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1241 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1242 nullfunc->seq_ctrl = 0;
1244 skb->priority = tid;
1245 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1247 nullfunc->qos_ctrl = cpu_to_le16(tid);
1249 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1250 nullfunc->qos_ctrl |=
1251 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1254 info = IEEE80211_SKB_CB(skb);
1257 * Tell TX path to send this frame even though the
1258 * STA may still remain is PS mode after this frame
1259 * exchange. Also set EOSP to indicate this packet
1260 * ends the poll/service period.
1262 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1263 IEEE80211_TX_STATUS_EOSP |
1264 IEEE80211_TX_CTL_REQ_TX_STATUS;
1266 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1269 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1272 skb->dev = sdata->dev;
1275 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1276 if (WARN_ON(!chanctx_conf)) {
1282 info->band = chanctx_conf->def.chan->band;
1283 ieee80211_xmit(sdata, sta, skb);
1287 static int find_highest_prio_tid(unsigned long tids)
1289 /* lower 3 TIDs aren't ordered perfectly */
1291 return fls(tids) - 1;
1292 /* TID 0 is BE just like TID 3 */
1295 return fls(tids) - 1;
1299 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1300 int n_frames, u8 ignored_acs,
1301 enum ieee80211_frame_release_type reason)
1303 struct ieee80211_sub_if_data *sdata = sta->sdata;
1304 struct ieee80211_local *local = sdata->local;
1305 bool more_data = false;
1307 unsigned long driver_release_tids = 0;
1308 struct sk_buff_head frames;
1310 /* Service or PS-Poll period starts */
1311 set_sta_flag(sta, WLAN_STA_SP);
1313 __skb_queue_head_init(&frames);
1315 /* Get response frame(s) and more data bit for the last one. */
1316 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1319 if (ignored_acs & BIT(ac))
1322 tids = ieee80211_tids_for_ac(ac);
1324 /* if we already have frames from software, then we can't also
1325 * release from hardware queues
1327 if (skb_queue_empty(&frames)) {
1328 driver_release_tids |= sta->driver_buffered_tids & tids;
1329 driver_release_tids |= sta->txq_buffered_tids & tids;
1332 if (driver_release_tids) {
1333 /* If the driver has data on more than one TID then
1334 * certainly there's more data if we release just a
1335 * single frame now (from a single TID). This will
1336 * only happen for PS-Poll.
1338 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1339 hweight16(driver_release_tids) > 1) {
1341 driver_release_tids =
1342 BIT(find_highest_prio_tid(
1343 driver_release_tids));
1347 struct sk_buff *skb;
1349 while (n_frames > 0) {
1350 skb = skb_dequeue(&sta->tx_filtered[ac]);
1353 &sta->ps_tx_buf[ac]);
1355 local->total_ps_buffered--;
1360 __skb_queue_tail(&frames, skb);
1364 /* If we have more frames buffered on this AC, then set the
1365 * more-data bit and abort the loop since we can't send more
1366 * data from other ACs before the buffered frames from this.
1368 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1369 !skb_queue_empty(&sta->ps_tx_buf[ac])) {
1375 if (skb_queue_empty(&frames) && !driver_release_tids) {
1379 * For PS-Poll, this can only happen due to a race condition
1380 * when we set the TIM bit and the station notices it, but
1381 * before it can poll for the frame we expire it.
1383 * For uAPSD, this is said in the standard (11.2.1.5 h):
1384 * At each unscheduled SP for a non-AP STA, the AP shall
1385 * attempt to transmit at least one MSDU or MMPDU, but no
1386 * more than the value specified in the Max SP Length field
1387 * in the QoS Capability element from delivery-enabled ACs,
1388 * that are destined for the non-AP STA.
1390 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1393 /* This will evaluate to 1, 3, 5 or 7. */
1394 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1396 ieee80211_send_null_response(sdata, sta, tid, reason, true);
1397 } else if (!driver_release_tids) {
1398 struct sk_buff_head pending;
1399 struct sk_buff *skb;
1402 bool need_null = false;
1404 skb_queue_head_init(&pending);
1406 while ((skb = __skb_dequeue(&frames))) {
1407 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1408 struct ieee80211_hdr *hdr = (void *) skb->data;
1414 * Tell TX path to send this frame even though the
1415 * STA may still remain is PS mode after this frame
1418 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1419 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1422 * Use MoreData flag to indicate whether there are
1423 * more buffered frames for this STA
1425 if (more_data || !skb_queue_empty(&frames))
1426 hdr->frame_control |=
1427 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1429 hdr->frame_control &=
1430 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1432 if (ieee80211_is_data_qos(hdr->frame_control) ||
1433 ieee80211_is_qos_nullfunc(hdr->frame_control))
1434 qoshdr = ieee80211_get_qos_ctl(hdr);
1436 tids |= BIT(skb->priority);
1438 __skb_queue_tail(&pending, skb);
1440 /* end service period after last frame or add one */
1441 if (!skb_queue_empty(&frames))
1444 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1445 /* for PS-Poll, there's only one frame */
1446 info->flags |= IEEE80211_TX_STATUS_EOSP |
1447 IEEE80211_TX_CTL_REQ_TX_STATUS;
1451 /* For uAPSD, things are a bit more complicated. If the
1452 * last frame has a QoS header (i.e. is a QoS-data or
1453 * QoS-nulldata frame) then just set the EOSP bit there
1455 * If the frame doesn't have a QoS header (which means
1456 * it should be a bufferable MMPDU) then we can't set
1457 * the EOSP bit in the QoS header; add a QoS-nulldata
1458 * frame to the list to send it after the MMPDU.
1460 * Note that this code is only in the mac80211-release
1461 * code path, we assume that the driver will not buffer
1462 * anything but QoS-data frames, or if it does, will
1463 * create the QoS-nulldata frame by itself if needed.
1465 * Cf. 802.11-2012 10.2.1.10 (c).
1468 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1470 info->flags |= IEEE80211_TX_STATUS_EOSP |
1471 IEEE80211_TX_CTL_REQ_TX_STATUS;
1473 /* The standard isn't completely clear on this
1474 * as it says the more-data bit should be set
1475 * if there are more BUs. The QoS-Null frame
1476 * we're about to send isn't buffered yet, we
1477 * only create it below, but let's pretend it
1478 * was buffered just in case some clients only
1479 * expect more-data=0 when eosp=1.
1481 hdr->frame_control |=
1482 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1489 drv_allow_buffered_frames(local, sta, tids, num,
1492 ieee80211_add_pending_skbs(local, &pending);
1495 ieee80211_send_null_response(
1496 sdata, sta, find_highest_prio_tid(tids),
1499 sta_info_recalc_tim(sta);
1501 unsigned long tids = sta->txq_buffered_tids & driver_release_tids;
1505 * We need to release a frame that is buffered somewhere in the
1506 * driver ... it'll have to handle that.
1507 * Note that the driver also has to check the number of frames
1508 * on the TIDs we're releasing from - if there are more than
1509 * n_frames it has to set the more-data bit (if we didn't ask
1510 * it to set it anyway due to other buffered frames); if there
1511 * are fewer than n_frames it has to make sure to adjust that
1512 * to allow the service period to end properly.
1514 drv_release_buffered_frames(local, sta, driver_release_tids,
1515 n_frames, reason, more_data);
1518 * Note that we don't recalculate the TIM bit here as it would
1519 * most likely have no effect at all unless the driver told us
1520 * that the TID(s) became empty before returning here from the
1522 * Either way, however, when the driver tells us that the TID(s)
1523 * became empty or we find that a txq became empty, we'll do the
1524 * TIM recalculation.
1527 if (!sta->sta.txq[0])
1530 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1531 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]);
1533 if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue))
1536 sta_info_recalc_tim(sta);
1542 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1544 u8 ignore_for_response = sta->sta.uapsd_queues;
1547 * If all ACs are delivery-enabled then we should reply
1548 * from any of them, if only some are enabled we reply
1549 * only from the non-enabled ones.
1551 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1552 ignore_for_response = 0;
1554 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1555 IEEE80211_FRAME_RELEASE_PSPOLL);
1558 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1560 int n_frames = sta->sta.max_sp;
1561 u8 delivery_enabled = sta->sta.uapsd_queues;
1564 * If we ever grow support for TSPEC this might happen if
1565 * the TSPEC update from hostapd comes in between a trigger
1566 * frame setting WLAN_STA_UAPSD in the RX path and this
1567 * actually getting called.
1569 if (!delivery_enabled)
1572 switch (sta->sta.max_sp) {
1583 /* XXX: what is a good value? */
1588 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1589 IEEE80211_FRAME_RELEASE_UAPSD);
1592 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1593 struct ieee80211_sta *pubsta, bool block)
1595 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1597 trace_api_sta_block_awake(sta->local, pubsta, block);
1600 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1604 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1607 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1608 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1609 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1610 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1611 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1612 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1613 /* must be asleep in this case */
1614 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1615 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1617 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1620 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1622 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1624 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1625 struct ieee80211_local *local = sta->local;
1627 trace_api_eosp(local, pubsta);
1629 clear_sta_flag(sta, WLAN_STA_SP);
1631 EXPORT_SYMBOL(ieee80211_sta_eosp);
1633 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1634 u8 tid, bool buffered)
1636 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1638 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1641 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1644 set_bit(tid, &sta->driver_buffered_tids);
1646 clear_bit(tid, &sta->driver_buffered_tids);
1648 sta_info_recalc_tim(sta);
1650 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1652 int sta_info_move_state(struct sta_info *sta,
1653 enum ieee80211_sta_state new_state)
1657 if (sta->sta_state == new_state)
1660 /* check allowed transitions first */
1662 switch (new_state) {
1663 case IEEE80211_STA_NONE:
1664 if (sta->sta_state != IEEE80211_STA_AUTH)
1667 case IEEE80211_STA_AUTH:
1668 if (sta->sta_state != IEEE80211_STA_NONE &&
1669 sta->sta_state != IEEE80211_STA_ASSOC)
1672 case IEEE80211_STA_ASSOC:
1673 if (sta->sta_state != IEEE80211_STA_AUTH &&
1674 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1677 case IEEE80211_STA_AUTHORIZED:
1678 if (sta->sta_state != IEEE80211_STA_ASSOC)
1682 WARN(1, "invalid state %d", new_state);
1686 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1687 sta->sta.addr, new_state);
1690 * notify the driver before the actual changes so it can
1691 * fail the transition
1693 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1694 int err = drv_sta_state(sta->local, sta->sdata, sta,
1695 sta->sta_state, new_state);
1700 /* reflect the change in all state variables */
1702 switch (new_state) {
1703 case IEEE80211_STA_NONE:
1704 if (sta->sta_state == IEEE80211_STA_AUTH)
1705 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1707 case IEEE80211_STA_AUTH:
1708 if (sta->sta_state == IEEE80211_STA_NONE)
1709 set_bit(WLAN_STA_AUTH, &sta->_flags);
1710 else if (sta->sta_state == IEEE80211_STA_ASSOC)
1711 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1713 case IEEE80211_STA_ASSOC:
1714 if (sta->sta_state == IEEE80211_STA_AUTH) {
1715 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1716 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1717 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1718 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1719 !sta->sdata->u.vlan.sta))
1720 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1721 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1724 case IEEE80211_STA_AUTHORIZED:
1725 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1726 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1727 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1728 !sta->sdata->u.vlan.sta))
1729 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1730 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1737 sta->sta_state = new_state;
1742 u8 sta_info_tx_streams(struct sta_info *sta)
1744 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1747 if (!sta->sta.ht_cap.ht_supported)
1750 if (sta->sta.vht_cap.vht_supported) {
1753 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1755 for (i = 7; i >= 0; i--)
1756 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1757 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1761 if (ht_cap->mcs.rx_mask[3])
1763 else if (ht_cap->mcs.rx_mask[2])
1765 else if (ht_cap->mcs.rx_mask[1])
1770 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1773 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1774 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1777 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
1779 struct ieee80211_sub_if_data *sdata = sta->sdata;
1780 struct ieee80211_local *local = sdata->local;
1781 struct rate_control_ref *ref = NULL;
1782 struct timespec uptime;
1786 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
1787 ref = local->rate_ctrl;
1789 sinfo->generation = sdata->local->sta_generation;
1791 /* do before driver, so beacon filtering drivers have a
1792 * chance to e.g. just add the number of filtered beacons
1793 * (or just modify the value entirely, of course)
1795 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1796 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
1798 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
1800 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
1801 BIT(NL80211_STA_INFO_STA_FLAGS) |
1802 BIT(NL80211_STA_INFO_BSS_PARAM) |
1803 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
1804 BIT(NL80211_STA_INFO_RX_DROP_MISC) |
1805 BIT(NL80211_STA_INFO_BEACON_LOSS);
1807 ktime_get_ts(&uptime);
1808 sinfo->connected_time = uptime.tv_sec - sta->last_connected;
1809 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
1811 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
1812 BIT(NL80211_STA_INFO_TX_BYTES)))) {
1813 sinfo->tx_bytes = 0;
1814 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1815 sinfo->tx_bytes += sta->tx_bytes[ac];
1816 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
1819 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
1820 sinfo->tx_packets = 0;
1821 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1822 sinfo->tx_packets += sta->tx_packets[ac];
1823 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
1826 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
1827 BIT(NL80211_STA_INFO_RX_BYTES)))) {
1828 sinfo->rx_bytes = sta->rx_bytes;
1829 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
1832 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
1833 sinfo->rx_packets = sta->rx_packets;
1834 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
1837 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
1838 sinfo->tx_retries = sta->tx_retry_count;
1839 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
1842 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
1843 sinfo->tx_failed = sta->tx_retry_failed;
1844 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
1847 sinfo->rx_dropped_misc = sta->rx_dropped;
1848 sinfo->beacon_loss_count = sta->beacon_loss_count;
1850 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1851 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
1852 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
1853 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
1854 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
1857 if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
1858 (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {
1859 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
1860 sinfo->signal = (s8)sta->last_signal;
1861 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
1864 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
1865 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
1866 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
1871 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
1872 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
1873 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
1874 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
1876 sinfo->chains = sta->chains;
1877 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
1878 sinfo->chain_signal[i] = sta->chain_signal_last[i];
1879 sinfo->chain_signal_avg[i] =
1880 (s8) -ewma_read(&sta->chain_signal_avg[i]);
1884 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
1885 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate);
1886 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
1889 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
1890 sta_set_rate_info_rx(sta, &sinfo->rxrate);
1891 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
1894 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
1895 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
1896 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
1898 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
1899 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
1900 tidstats->rx_msdu = sta->rx_msdu[i];
1903 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
1904 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
1905 tidstats->tx_msdu = sta->tx_msdu[i];
1908 if (!(tidstats->filled &
1909 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
1910 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1912 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
1913 tidstats->tx_msdu_retries = sta->tx_msdu_retries[i];
1916 if (!(tidstats->filled &
1917 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
1918 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1920 BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
1921 tidstats->tx_msdu_failed = sta->tx_msdu_failed[i];
1925 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1926 #ifdef CONFIG_MAC80211_MESH
1927 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
1928 BIT(NL80211_STA_INFO_PLID) |
1929 BIT(NL80211_STA_INFO_PLINK_STATE) |
1930 BIT(NL80211_STA_INFO_LOCAL_PM) |
1931 BIT(NL80211_STA_INFO_PEER_PM) |
1932 BIT(NL80211_STA_INFO_NONPEER_PM);
1934 sinfo->llid = sta->llid;
1935 sinfo->plid = sta->plid;
1936 sinfo->plink_state = sta->plink_state;
1937 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
1938 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
1939 sinfo->t_offset = sta->t_offset;
1941 sinfo->local_pm = sta->local_pm;
1942 sinfo->peer_pm = sta->peer_pm;
1943 sinfo->nonpeer_pm = sta->nonpeer_pm;
1947 sinfo->bss_param.flags = 0;
1948 if (sdata->vif.bss_conf.use_cts_prot)
1949 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
1950 if (sdata->vif.bss_conf.use_short_preamble)
1951 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
1952 if (sdata->vif.bss_conf.use_short_slot)
1953 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
1954 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
1955 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
1957 sinfo->sta_flags.set = 0;
1958 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
1959 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
1960 BIT(NL80211_STA_FLAG_WME) |
1961 BIT(NL80211_STA_FLAG_MFP) |
1962 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1963 BIT(NL80211_STA_FLAG_ASSOCIATED) |
1964 BIT(NL80211_STA_FLAG_TDLS_PEER);
1965 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1966 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
1967 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
1968 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
1970 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
1971 if (test_sta_flag(sta, WLAN_STA_MFP))
1972 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
1973 if (test_sta_flag(sta, WLAN_STA_AUTH))
1974 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
1975 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1976 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1977 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1978 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
1980 /* check if the driver has a SW RC implementation */
1981 if (ref && ref->ops->get_expected_throughput)
1982 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
1984 thr = drv_get_expected_throughput(local, &sta->sta);
1987 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
1988 sinfo->expected_throughput = thr;