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 /* Caller must hold local->sta_mtx */
68 static int sta_info_hash_del(struct ieee80211_local
*local
,
73 s
= rcu_dereference_protected(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
74 lockdep_is_held(&local
->sta_mtx
));
78 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
83 while (rcu_access_pointer(s
->hnext
) &&
84 rcu_access_pointer(s
->hnext
) != sta
)
85 s
= rcu_dereference_protected(s
->hnext
,
86 lockdep_is_held(&local
->sta_mtx
));
87 if (rcu_access_pointer(s
->hnext
)) {
88 rcu_assign_pointer(s
->hnext
, sta
->hnext
);
95 static void __cleanup_single_sta(struct sta_info
*sta
)
98 struct tid_ampdu_tx
*tid_tx
;
99 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
100 struct ieee80211_local
*local
= sdata
->local
;
103 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
104 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
105 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
106 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
107 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
108 ps
= &sdata
->bss
->ps
;
109 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
110 ps
= &sdata
->u
.mesh
.ps
;
114 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
115 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
116 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
118 atomic_dec(&ps
->num_sta_ps
);
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 /* Mark TID as unreserved */
354 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
356 ktime_get_ts(&uptime
);
357 sta
->last_connected
= uptime
.tv_sec
;
358 ewma_init(&sta
->avg_signal
, 1024, 8);
359 for (i
= 0; i
< ARRAY_SIZE(sta
->chain_signal_avg
); i
++)
360 ewma_init(&sta
->chain_signal_avg
[i
], 1024, 8);
362 if (sta_prepare_rate_control(local
, sta
, gfp
))
365 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
367 * timer_to_tid must be initialized with identity mapping
368 * to enable session_timer's data differentiation. See
369 * sta_rx_agg_session_timer_expired for usage.
371 sta
->timer_to_tid
[i
] = i
;
373 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
374 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
375 skb_queue_head_init(&sta
->tx_filtered
[i
]);
378 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
379 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
381 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
382 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
383 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
384 struct ieee80211_supported_band
*sband
=
385 local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
386 u8 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
387 IEEE80211_HT_CAP_SM_PS_SHIFT
;
389 * Assume that hostapd advertises our caps in the beacon and
390 * this is the known_smps_mode for a station that just assciated
393 case WLAN_HT_SMPS_CONTROL_DISABLED
:
394 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
396 case WLAN_HT_SMPS_CONTROL_STATIC
:
397 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
399 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
400 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
407 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
412 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
413 kfree(sta
->tx_lat
[i
].bins
);
420 static int sta_info_insert_check(struct sta_info
*sta
)
422 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
425 * Can't be a WARN_ON because it can be triggered through a race:
426 * something inserts a STA (on one CPU) without holding the RTNL
427 * and another CPU turns off the net device.
429 if (unlikely(!ieee80211_sdata_running(sdata
)))
432 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
433 is_multicast_ether_addr(sta
->sta
.addr
)))
439 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
440 struct ieee80211_sub_if_data
*sdata
,
441 struct sta_info
*sta
)
443 enum ieee80211_sta_state state
;
446 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
447 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
454 * Drivers using legacy sta_add/sta_remove callbacks only
455 * get uploaded set to true after sta_add is called.
457 if (!local
->ops
->sta_add
)
458 sta
->uploaded
= true;
462 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
464 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
465 sta
->sta
.addr
, state
+ 1, err
);
469 /* unwind on error */
470 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
471 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
477 * should be called with sta_mtx locked
478 * this function replaces the mutex lock
481 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
483 struct ieee80211_local
*local
= sta
->local
;
484 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
485 struct station_info sinfo
;
488 lockdep_assert_held(&local
->sta_mtx
);
490 /* check if STA exists already */
491 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
497 local
->sta_generation
++;
500 /* simplify things and don't accept BA sessions yet */
501 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
503 /* make the station visible */
504 sta_info_hash_add(local
, sta
);
506 list_add_tail_rcu(&sta
->list
, &local
->sta_list
);
509 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
513 set_sta_flag(sta
, WLAN_STA_INSERTED
);
514 /* accept BA sessions now */
515 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
517 ieee80211_recalc_min_chandef(sdata
);
518 ieee80211_sta_debugfs_add(sta
);
519 rate_control_add_sta_debugfs(sta
);
521 memset(&sinfo
, 0, sizeof(sinfo
));
523 sinfo
.generation
= local
->sta_generation
;
524 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
526 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
528 /* move reference to rcu-protected */
530 mutex_unlock(&local
->sta_mtx
);
532 if (ieee80211_vif_is_mesh(&sdata
->vif
))
533 mesh_accept_plinks_update(sdata
);
537 sta_info_hash_del(local
, sta
);
538 list_del_rcu(&sta
->list
);
541 __cleanup_single_sta(sta
);
543 mutex_unlock(&local
->sta_mtx
);
548 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
550 struct ieee80211_local
*local
= sta
->local
;
555 err
= sta_info_insert_check(sta
);
561 mutex_lock(&local
->sta_mtx
);
563 err
= sta_info_insert_finish(sta
);
569 sta_info_free(local
, sta
);
573 int sta_info_insert(struct sta_info
*sta
)
575 int err
= sta_info_insert_rcu(sta
);
582 static inline void __bss_tim_set(u8
*tim
, u16 id
)
585 * This format has been mandated by the IEEE specifications,
586 * so this line may not be changed to use the __set_bit() format.
588 tim
[id
/ 8] |= (1 << (id
% 8));
591 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
594 * This format has been mandated by the IEEE specifications,
595 * so this line may not be changed to use the __clear_bit() format.
597 tim
[id
/ 8] &= ~(1 << (id
% 8));
600 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
603 * This format has been mandated by the IEEE specifications,
604 * so this line may not be changed to use the test_bit() format.
606 return tim
[id
/ 8] & (1 << (id
% 8));
609 static unsigned long ieee80211_tids_for_ac(int ac
)
611 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
613 case IEEE80211_AC_VO
:
614 return BIT(6) | BIT(7);
615 case IEEE80211_AC_VI
:
616 return BIT(4) | BIT(5);
617 case IEEE80211_AC_BE
:
618 return BIT(0) | BIT(3);
619 case IEEE80211_AC_BK
:
620 return BIT(1) | BIT(2);
627 static void __sta_info_recalc_tim(struct sta_info
*sta
, bool ignore_pending
)
629 struct ieee80211_local
*local
= sta
->local
;
631 bool indicate_tim
= false;
632 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
636 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
637 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
638 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
641 ps
= &sta
->sdata
->bss
->ps
;
643 #ifdef CONFIG_MAC80211_MESH
644 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
645 ps
= &sta
->sdata
->u
.mesh
.ps
;
646 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
647 id
= sta
->plid
% (IEEE80211_MAX_AID
+ 1);
653 /* No need to do anything if the driver does all */
654 if (local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
661 * If all ACs are delivery-enabled then we should build
662 * the TIM bit for all ACs anyway; if only some are then
663 * we ignore those and build the TIM bit using only the
666 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
670 ignore_for_tim
= BIT(IEEE80211_NUM_ACS
) - 1;
672 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
675 if (ignore_for_tim
& BIT(ac
))
678 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
679 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
683 tids
= ieee80211_tids_for_ac(ac
);
686 sta
->driver_buffered_tids
& tids
;
690 spin_lock_bh(&local
->tim_lock
);
692 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
696 __bss_tim_set(ps
->tim
, id
);
698 __bss_tim_clear(ps
->tim
, id
);
700 if (local
->ops
->set_tim
&& !WARN_ON(sta
->dead
)) {
701 local
->tim_in_locked_section
= true;
702 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
703 local
->tim_in_locked_section
= false;
707 spin_unlock_bh(&local
->tim_lock
);
710 void sta_info_recalc_tim(struct sta_info
*sta
)
712 __sta_info_recalc_tim(sta
, false);
715 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
717 struct ieee80211_tx_info
*info
;
723 info
= IEEE80211_SKB_CB(skb
);
725 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
726 timeout
= (sta
->listen_interval
*
727 sta
->sdata
->vif
.bss_conf
.beacon_int
*
729 if (timeout
< STA_TX_BUFFER_EXPIRE
)
730 timeout
= STA_TX_BUFFER_EXPIRE
;
731 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
735 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
736 struct sta_info
*sta
, int ac
)
742 * First check for frames that should expire on the filtered
743 * queue. Frames here were rejected by the driver and are on
744 * a separate queue to avoid reordering with normal PS-buffered
745 * frames. They also aren't accounted for right now in the
746 * total_ps_buffered counter.
749 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
750 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
751 if (sta_info_buffer_expired(sta
, skb
))
752 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
755 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
758 * Frames are queued in order, so if this one
759 * hasn't expired yet we can stop testing. If
760 * we actually reached the end of the queue we
761 * also need to stop, of course.
765 ieee80211_free_txskb(&local
->hw
, skb
);
769 * Now also check the normal PS-buffered queue, this will
770 * only find something if the filtered queue was emptied
771 * since the filtered frames are all before the normal PS
775 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
776 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
777 if (sta_info_buffer_expired(sta
, skb
))
778 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
781 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
784 * frames are queued in order, so if this one
785 * hasn't expired yet (or we reached the end of
786 * the queue) we can stop testing
791 local
->total_ps_buffered
--;
792 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
794 ieee80211_free_txskb(&local
->hw
, skb
);
798 * Finally, recalculate the TIM bit for this station -- it might
799 * now be clear because the station was too slow to retrieve its
802 sta_info_recalc_tim(sta
);
805 * Return whether there are any frames still buffered, this is
806 * used to check whether the cleanup timer still needs to run,
807 * if there are no frames we don't need to rearm the timer.
809 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
810 skb_queue_empty(&sta
->tx_filtered
[ac
]));
813 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
814 struct sta_info
*sta
)
816 bool have_buffered
= false;
819 /* This is only necessary for stations on BSS/MBSS interfaces */
820 if (!sta
->sdata
->bss
&&
821 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
824 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
826 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
828 return have_buffered
;
831 static int __must_check
__sta_info_destroy_part1(struct sta_info
*sta
)
833 struct ieee80211_local
*local
;
834 struct ieee80211_sub_if_data
*sdata
;
845 lockdep_assert_held(&local
->sta_mtx
);
848 * Before removing the station from the driver and
849 * rate control, it might still start new aggregation
850 * sessions -- block that to make sure the tear-down
851 * will be sufficient.
853 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
854 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
856 ret
= sta_info_hash_del(local
, sta
);
861 * for TDLS peers, make sure to return to the base channel before
864 if (test_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
)) {
865 drv_tdls_cancel_channel_switch(local
, sdata
, &sta
->sta
);
866 clear_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
);
869 list_del_rcu(&sta
->list
);
871 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
873 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
874 rcu_access_pointer(sdata
->u
.vlan
.sta
) == sta
)
875 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
880 static void __sta_info_destroy_part2(struct sta_info
*sta
)
882 struct ieee80211_local
*local
= sta
->local
;
883 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
884 struct station_info sinfo
= {};
888 * NOTE: This assumes at least synchronize_net() was done
889 * after _part1 and before _part2!
893 lockdep_assert_held(&local
->sta_mtx
);
895 /* now keys can no longer be reached */
896 ieee80211_free_sta_keys(local
, sta
);
898 /* disable TIM bit - last chance to tell driver */
899 __sta_info_recalc_tim(sta
, true);
904 local
->sta_generation
++;
906 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
907 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
915 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
916 IEEE80211_STA_NOTEXIST
);
917 WARN_ON_ONCE(ret
!= 0);
920 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
922 sta_set_sinfo(sta
, &sinfo
);
923 cfg80211_del_sta_sinfo(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
925 rate_control_remove_sta_debugfs(sta
);
926 ieee80211_sta_debugfs_remove(sta
);
927 ieee80211_recalc_min_chandef(sdata
);
929 cleanup_single_sta(sta
);
932 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
934 int err
= __sta_info_destroy_part1(sta
);
941 __sta_info_destroy_part2(sta
);
946 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
948 struct sta_info
*sta
;
951 mutex_lock(&sdata
->local
->sta_mtx
);
952 sta
= sta_info_get(sdata
, addr
);
953 ret
= __sta_info_destroy(sta
);
954 mutex_unlock(&sdata
->local
->sta_mtx
);
959 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
962 struct sta_info
*sta
;
965 mutex_lock(&sdata
->local
->sta_mtx
);
966 sta
= sta_info_get_bss(sdata
, addr
);
967 ret
= __sta_info_destroy(sta
);
968 mutex_unlock(&sdata
->local
->sta_mtx
);
973 static void sta_info_cleanup(unsigned long data
)
975 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
976 struct sta_info
*sta
;
977 bool timer_needed
= false;
980 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
981 if (sta_info_cleanup_expire_buffered(local
, sta
))
985 if (local
->quiescing
)
991 mod_timer(&local
->sta_cleanup
,
992 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
995 void sta_info_init(struct ieee80211_local
*local
)
997 spin_lock_init(&local
->tim_lock
);
998 mutex_init(&local
->sta_mtx
);
999 INIT_LIST_HEAD(&local
->sta_list
);
1001 setup_timer(&local
->sta_cleanup
, sta_info_cleanup
,
1002 (unsigned long)local
);
1005 void sta_info_stop(struct ieee80211_local
*local
)
1007 del_timer_sync(&local
->sta_cleanup
);
1011 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
)
1013 struct ieee80211_local
*local
= sdata
->local
;
1014 struct sta_info
*sta
, *tmp
;
1015 LIST_HEAD(free_list
);
1020 WARN_ON(vlans
&& sdata
->vif
.type
!= NL80211_IFTYPE_AP
);
1021 WARN_ON(vlans
&& !sdata
->bss
);
1023 mutex_lock(&local
->sta_mtx
);
1024 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1025 if (sdata
== sta
->sdata
||
1026 (vlans
&& sdata
->bss
== sta
->sdata
->bss
)) {
1027 if (!WARN_ON(__sta_info_destroy_part1(sta
)))
1028 list_add(&sta
->free_list
, &free_list
);
1033 if (!list_empty(&free_list
)) {
1035 list_for_each_entry_safe(sta
, tmp
, &free_list
, free_list
)
1036 __sta_info_destroy_part2(sta
);
1038 mutex_unlock(&local
->sta_mtx
);
1043 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
1044 unsigned long exp_time
)
1046 struct ieee80211_local
*local
= sdata
->local
;
1047 struct sta_info
*sta
, *tmp
;
1049 mutex_lock(&local
->sta_mtx
);
1051 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1052 if (sdata
!= sta
->sdata
)
1055 if (time_after(jiffies
, sta
->last_rx
+ exp_time
)) {
1056 sta_dbg(sta
->sdata
, "expiring inactive STA %pM\n",
1059 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1060 test_sta_flag(sta
, WLAN_STA_PS_STA
))
1061 atomic_dec(&sdata
->u
.mesh
.ps
.num_sta_ps
);
1063 WARN_ON(__sta_info_destroy(sta
));
1067 mutex_unlock(&local
->sta_mtx
);
1070 struct ieee80211_sta
*ieee80211_find_sta_by_ifaddr(struct ieee80211_hw
*hw
,
1072 const u8
*localaddr
)
1074 struct sta_info
*sta
, *nxt
;
1077 * Just return a random station if localaddr is NULL
1078 * ... first in list.
1080 for_each_sta_info(hw_to_local(hw
), addr
, sta
, nxt
) {
1082 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1091 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1093 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1096 struct sta_info
*sta
;
1101 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1110 EXPORT_SYMBOL(ieee80211_find_sta
);
1112 /* powersave support code */
1113 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
)
1115 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1116 struct ieee80211_local
*local
= sdata
->local
;
1117 struct sk_buff_head pending
;
1118 int filtered
= 0, buffered
= 0, ac
;
1119 unsigned long flags
;
1122 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1123 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1126 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1127 ps
= &sdata
->bss
->ps
;
1128 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1129 ps
= &sdata
->u
.mesh
.ps
;
1133 clear_sta_flag(sta
, WLAN_STA_SP
);
1135 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1136 sta
->driver_buffered_tids
= 0;
1138 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1139 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1141 skb_queue_head_init(&pending
);
1143 /* sync with ieee80211_tx_h_unicast_ps_buf */
1144 spin_lock(&sta
->ps_lock
);
1145 /* Send all buffered frames to the station */
1146 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1147 int count
= skb_queue_len(&pending
), tmp
;
1149 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1150 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1151 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1152 tmp
= skb_queue_len(&pending
);
1153 filtered
+= tmp
- count
;
1156 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1157 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1158 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1159 tmp
= skb_queue_len(&pending
);
1160 buffered
+= tmp
- count
;
1163 ieee80211_add_pending_skbs(local
, &pending
);
1165 /* now we're no longer in the deliver code */
1166 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1168 /* The station might have polled and then woken up before we responded,
1169 * so clear these flags now to avoid them sticking around.
1171 clear_sta_flag(sta
, WLAN_STA_PSPOLL
);
1172 clear_sta_flag(sta
, WLAN_STA_UAPSD
);
1173 spin_unlock(&sta
->ps_lock
);
1175 atomic_dec(&ps
->num_sta_ps
);
1177 /* This station just woke up and isn't aware of our SMPS state */
1178 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1179 !ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1180 sdata
->smps_mode
) &&
1181 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1182 sta_info_tx_streams(sta
) != 1) {
1184 "%pM just woke up and MIMO capable - update SMPS\n",
1186 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1188 sdata
->vif
.bss_conf
.bssid
);
1191 local
->total_ps_buffered
-= buffered
;
1193 sta_info_recalc_tim(sta
);
1196 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1197 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1200 static void ieee80211_send_null_response(struct ieee80211_sub_if_data
*sdata
,
1201 struct sta_info
*sta
, int tid
,
1202 enum ieee80211_frame_release_type reason
,
1205 struct ieee80211_local
*local
= sdata
->local
;
1206 struct ieee80211_qos_hdr
*nullfunc
;
1207 struct sk_buff
*skb
;
1208 int size
= sizeof(*nullfunc
);
1210 bool qos
= sta
->sta
.wme
;
1211 struct ieee80211_tx_info
*info
;
1212 struct ieee80211_chanctx_conf
*chanctx_conf
;
1215 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1216 IEEE80211_STYPE_QOS_NULLFUNC
|
1217 IEEE80211_FCTL_FROMDS
);
1220 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1221 IEEE80211_STYPE_NULLFUNC
|
1222 IEEE80211_FCTL_FROMDS
);
1225 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1229 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1231 nullfunc
= (void *) skb_put(skb
, size
);
1232 nullfunc
->frame_control
= fc
;
1233 nullfunc
->duration_id
= 0;
1234 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1235 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1236 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1237 nullfunc
->seq_ctrl
= 0;
1239 skb
->priority
= tid
;
1240 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1242 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1244 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
)
1245 nullfunc
->qos_ctrl
|=
1246 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1249 info
= IEEE80211_SKB_CB(skb
);
1252 * Tell TX path to send this frame even though the
1253 * STA may still remain is PS mode after this frame
1254 * exchange. Also set EOSP to indicate this packet
1255 * ends the poll/service period.
1257 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1258 IEEE80211_TX_STATUS_EOSP
|
1259 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1261 info
->control
.flags
|= IEEE80211_TX_CTRL_PS_RESPONSE
;
1264 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1,
1267 skb
->dev
= sdata
->dev
;
1270 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1271 if (WARN_ON(!chanctx_conf
)) {
1277 info
->band
= chanctx_conf
->def
.chan
->band
;
1278 ieee80211_xmit(sdata
, skb
);
1282 static int find_highest_prio_tid(unsigned long tids
)
1284 /* lower 3 TIDs aren't ordered perfectly */
1286 return fls(tids
) - 1;
1287 /* TID 0 is BE just like TID 3 */
1290 return fls(tids
) - 1;
1294 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1295 int n_frames
, u8 ignored_acs
,
1296 enum ieee80211_frame_release_type reason
)
1298 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1299 struct ieee80211_local
*local
= sdata
->local
;
1300 bool more_data
= false;
1302 unsigned long driver_release_tids
= 0;
1303 struct sk_buff_head frames
;
1305 /* Service or PS-Poll period starts */
1306 set_sta_flag(sta
, WLAN_STA_SP
);
1308 __skb_queue_head_init(&frames
);
1310 /* Get response frame(s) and more data bit for the last one. */
1311 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1314 if (ignored_acs
& BIT(ac
))
1317 tids
= ieee80211_tids_for_ac(ac
);
1319 /* if we already have frames from software, then we can't also
1320 * release from hardware queues
1322 if (skb_queue_empty(&frames
))
1323 driver_release_tids
|= sta
->driver_buffered_tids
& tids
;
1325 if (driver_release_tids
) {
1326 /* If the driver has data on more than one TID then
1327 * certainly there's more data if we release just a
1328 * single frame now (from a single TID). This will
1329 * only happen for PS-Poll.
1331 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1332 hweight16(driver_release_tids
) > 1) {
1334 driver_release_tids
=
1335 BIT(find_highest_prio_tid(
1336 driver_release_tids
));
1340 struct sk_buff
*skb
;
1342 while (n_frames
> 0) {
1343 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1346 &sta
->ps_tx_buf
[ac
]);
1348 local
->total_ps_buffered
--;
1353 __skb_queue_tail(&frames
, skb
);
1357 /* If we have more frames buffered on this AC, then set the
1358 * more-data bit and abort the loop since we can't send more
1359 * data from other ACs before the buffered frames from this.
1361 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1362 !skb_queue_empty(&sta
->ps_tx_buf
[ac
])) {
1368 if (skb_queue_empty(&frames
) && !driver_release_tids
) {
1372 * For PS-Poll, this can only happen due to a race condition
1373 * when we set the TIM bit and the station notices it, but
1374 * before it can poll for the frame we expire it.
1376 * For uAPSD, this is said in the standard (11.2.1.5 h):
1377 * At each unscheduled SP for a non-AP STA, the AP shall
1378 * attempt to transmit at least one MSDU or MMPDU, but no
1379 * more than the value specified in the Max SP Length field
1380 * in the QoS Capability element from delivery-enabled ACs,
1381 * that are destined for the non-AP STA.
1383 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1386 /* This will evaluate to 1, 3, 5 or 7. */
1387 tid
= 7 - ((ffs(~ignored_acs
) - 1) << 1);
1389 ieee80211_send_null_response(sdata
, sta
, tid
, reason
, true);
1390 } else if (!driver_release_tids
) {
1391 struct sk_buff_head pending
;
1392 struct sk_buff
*skb
;
1395 bool need_null
= false;
1397 skb_queue_head_init(&pending
);
1399 while ((skb
= __skb_dequeue(&frames
))) {
1400 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1401 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1407 * Tell TX path to send this frame even though the
1408 * STA may still remain is PS mode after this frame
1411 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
1412 info
->control
.flags
|= IEEE80211_TX_CTRL_PS_RESPONSE
;
1415 * Use MoreData flag to indicate whether there are
1416 * more buffered frames for this STA
1418 if (more_data
|| !skb_queue_empty(&frames
))
1419 hdr
->frame_control
|=
1420 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1422 hdr
->frame_control
&=
1423 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1425 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1426 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1427 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1429 tids
|= BIT(skb
->priority
);
1431 __skb_queue_tail(&pending
, skb
);
1433 /* end service period after last frame or add one */
1434 if (!skb_queue_empty(&frames
))
1437 if (reason
!= IEEE80211_FRAME_RELEASE_UAPSD
) {
1438 /* for PS-Poll, there's only one frame */
1439 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1440 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1444 /* For uAPSD, things are a bit more complicated. If the
1445 * last frame has a QoS header (i.e. is a QoS-data or
1446 * QoS-nulldata frame) then just set the EOSP bit there
1448 * If the frame doesn't have a QoS header (which means
1449 * it should be a bufferable MMPDU) then we can't set
1450 * the EOSP bit in the QoS header; add a QoS-nulldata
1451 * frame to the list to send it after the MMPDU.
1453 * Note that this code is only in the mac80211-release
1454 * code path, we assume that the driver will not buffer
1455 * anything but QoS-data frames, or if it does, will
1456 * create the QoS-nulldata frame by itself if needed.
1458 * Cf. 802.11-2012 10.2.1.10 (c).
1461 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1463 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1464 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1466 /* The standard isn't completely clear on this
1467 * as it says the more-data bit should be set
1468 * if there are more BUs. The QoS-Null frame
1469 * we're about to send isn't buffered yet, we
1470 * only create it below, but let's pretend it
1471 * was buffered just in case some clients only
1472 * expect more-data=0 when eosp=1.
1474 hdr
->frame_control
|=
1475 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1482 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1485 ieee80211_add_pending_skbs(local
, &pending
);
1488 ieee80211_send_null_response(
1489 sdata
, sta
, find_highest_prio_tid(tids
),
1492 sta_info_recalc_tim(sta
);
1495 * We need to release a frame that is buffered somewhere in the
1496 * driver ... it'll have to handle that.
1497 * Note that the driver also has to check the number of frames
1498 * on the TIDs we're releasing from - if there are more than
1499 * n_frames it has to set the more-data bit (if we didn't ask
1500 * it to set it anyway due to other buffered frames); if there
1501 * are fewer than n_frames it has to make sure to adjust that
1502 * to allow the service period to end properly.
1504 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1505 n_frames
, reason
, more_data
);
1508 * Note that we don't recalculate the TIM bit here as it would
1509 * most likely have no effect at all unless the driver told us
1510 * that the TID(s) became empty before returning here from the
1512 * Either way, however, when the driver tells us that the TID(s)
1513 * became empty we'll do the TIM recalculation.
1518 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1520 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1523 * If all ACs are delivery-enabled then we should reply
1524 * from any of them, if only some are enabled we reply
1525 * only from the non-enabled ones.
1527 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1528 ignore_for_response
= 0;
1530 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1531 IEEE80211_FRAME_RELEASE_PSPOLL
);
1534 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1536 int n_frames
= sta
->sta
.max_sp
;
1537 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1540 * If we ever grow support for TSPEC this might happen if
1541 * the TSPEC update from hostapd comes in between a trigger
1542 * frame setting WLAN_STA_UAPSD in the RX path and this
1543 * actually getting called.
1545 if (!delivery_enabled
)
1548 switch (sta
->sta
.max_sp
) {
1559 /* XXX: what is a good value? */
1564 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1565 IEEE80211_FRAME_RELEASE_UAPSD
);
1568 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1569 struct ieee80211_sta
*pubsta
, bool block
)
1571 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1573 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1576 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1580 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1583 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1584 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1585 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1586 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1587 } else if (test_sta_flag(sta
, WLAN_STA_PSPOLL
) ||
1588 test_sta_flag(sta
, WLAN_STA_UAPSD
)) {
1589 /* must be asleep in this case */
1590 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1591 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1593 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1596 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1598 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1600 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1601 struct ieee80211_local
*local
= sta
->local
;
1603 trace_api_eosp(local
, pubsta
);
1605 clear_sta_flag(sta
, WLAN_STA_SP
);
1607 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1609 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1610 u8 tid
, bool buffered
)
1612 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1614 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1617 trace_api_sta_set_buffered(sta
->local
, pubsta
, tid
, buffered
);
1620 set_bit(tid
, &sta
->driver_buffered_tids
);
1622 clear_bit(tid
, &sta
->driver_buffered_tids
);
1624 sta_info_recalc_tim(sta
);
1626 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1628 int sta_info_move_state(struct sta_info
*sta
,
1629 enum ieee80211_sta_state new_state
)
1633 if (sta
->sta_state
== new_state
)
1636 /* check allowed transitions first */
1638 switch (new_state
) {
1639 case IEEE80211_STA_NONE
:
1640 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1643 case IEEE80211_STA_AUTH
:
1644 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1645 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1648 case IEEE80211_STA_ASSOC
:
1649 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1650 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1653 case IEEE80211_STA_AUTHORIZED
:
1654 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1658 WARN(1, "invalid state %d", new_state
);
1662 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1663 sta
->sta
.addr
, new_state
);
1666 * notify the driver before the actual changes so it can
1667 * fail the transition
1669 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1670 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1671 sta
->sta_state
, new_state
);
1676 /* reflect the change in all state variables */
1678 switch (new_state
) {
1679 case IEEE80211_STA_NONE
:
1680 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1681 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1683 case IEEE80211_STA_AUTH
:
1684 if (sta
->sta_state
== IEEE80211_STA_NONE
)
1685 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1686 else if (sta
->sta_state
== IEEE80211_STA_ASSOC
)
1687 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1689 case IEEE80211_STA_ASSOC
:
1690 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1691 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1692 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1693 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1694 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1695 !sta
->sdata
->u
.vlan
.sta
))
1696 atomic_dec(&sta
->sdata
->bss
->num_mcast_sta
);
1697 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1700 case IEEE80211_STA_AUTHORIZED
:
1701 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1702 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1703 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1704 !sta
->sdata
->u
.vlan
.sta
))
1705 atomic_inc(&sta
->sdata
->bss
->num_mcast_sta
);
1706 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1713 sta
->sta_state
= new_state
;
1718 u8
sta_info_tx_streams(struct sta_info
*sta
)
1720 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1723 if (!sta
->sta
.ht_cap
.ht_supported
)
1726 if (sta
->sta
.vht_cap
.vht_supported
) {
1729 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1731 for (i
= 7; i
>= 0; i
--)
1732 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1733 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1737 if (ht_cap
->mcs
.rx_mask
[3])
1739 else if (ht_cap
->mcs
.rx_mask
[2])
1741 else if (ht_cap
->mcs
.rx_mask
[1])
1746 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1749 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1750 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;
1753 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
)
1755 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1756 struct ieee80211_local
*local
= sdata
->local
;
1757 struct rate_control_ref
*ref
= NULL
;
1758 struct timespec uptime
;
1762 if (test_sta_flag(sta
, WLAN_STA_RATE_CONTROL
))
1763 ref
= local
->rate_ctrl
;
1765 sinfo
->generation
= sdata
->local
->sta_generation
;
1767 /* do before driver, so beacon filtering drivers have a
1768 * chance to e.g. just add the number of filtered beacons
1769 * (or just modify the value entirely, of course)
1771 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1772 sinfo
->rx_beacon
= sdata
->u
.mgd
.count_beacon_signal
;
1774 drv_sta_statistics(local
, sdata
, &sta
->sta
, sinfo
);
1776 sinfo
->filled
|= BIT(NL80211_STA_INFO_INACTIVE_TIME
) |
1777 BIT(NL80211_STA_INFO_STA_FLAGS
) |
1778 BIT(NL80211_STA_INFO_BSS_PARAM
) |
1779 BIT(NL80211_STA_INFO_CONNECTED_TIME
) |
1780 BIT(NL80211_STA_INFO_RX_DROP_MISC
) |
1781 BIT(NL80211_STA_INFO_BEACON_LOSS
);
1783 ktime_get_ts(&uptime
);
1784 sinfo
->connected_time
= uptime
.tv_sec
- sta
->last_connected
;
1785 sinfo
->inactive_time
= jiffies_to_msecs(jiffies
- sta
->last_rx
);
1787 if (!(sinfo
->filled
& (BIT(NL80211_STA_INFO_TX_BYTES64
) |
1788 BIT(NL80211_STA_INFO_TX_BYTES
)))) {
1789 sinfo
->tx_bytes
= 0;
1790 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
1791 sinfo
->tx_bytes
+= sta
->tx_bytes
[ac
];
1792 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_BYTES64
);
1795 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_PACKETS
))) {
1796 sinfo
->tx_packets
= 0;
1797 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
1798 sinfo
->tx_packets
+= sta
->tx_packets
[ac
];
1799 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_PACKETS
);
1802 if (!(sinfo
->filled
& (BIT(NL80211_STA_INFO_RX_BYTES64
) |
1803 BIT(NL80211_STA_INFO_RX_BYTES
)))) {
1804 sinfo
->rx_bytes
= sta
->rx_bytes
;
1805 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_BYTES64
);
1808 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_RX_PACKETS
))) {
1809 sinfo
->rx_packets
= sta
->rx_packets
;
1810 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_PACKETS
);
1813 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_RETRIES
))) {
1814 sinfo
->tx_retries
= sta
->tx_retry_count
;
1815 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_RETRIES
);
1818 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_FAILED
))) {
1819 sinfo
->tx_failed
= sta
->tx_retry_failed
;
1820 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_FAILED
);
1823 sinfo
->rx_dropped_misc
= sta
->rx_dropped
;
1824 sinfo
->beacon_loss_count
= sta
->beacon_loss_count
;
1826 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1827 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)) {
1828 sinfo
->filled
|= BIT(NL80211_STA_INFO_BEACON_RX
) |
1829 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG
);
1830 sinfo
->rx_beacon_signal_avg
= ieee80211_ave_rssi(&sdata
->vif
);
1833 if ((sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
) ||
1834 (sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)) {
1835 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_SIGNAL
))) {
1836 sinfo
->signal
= (s8
)sta
->last_signal
;
1837 sinfo
->filled
|= BIT(NL80211_STA_INFO_SIGNAL
);
1840 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_SIGNAL_AVG
))) {
1841 sinfo
->signal_avg
= (s8
) -ewma_read(&sta
->avg_signal
);
1842 sinfo
->filled
|= BIT(NL80211_STA_INFO_SIGNAL_AVG
);
1847 !(sinfo
->filled
& (BIT(NL80211_STA_INFO_CHAIN_SIGNAL
) |
1848 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG
)))) {
1849 sinfo
->filled
|= BIT(NL80211_STA_INFO_CHAIN_SIGNAL
) |
1850 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG
);
1852 sinfo
->chains
= sta
->chains
;
1853 for (i
= 0; i
< ARRAY_SIZE(sinfo
->chain_signal
); i
++) {
1854 sinfo
->chain_signal
[i
] = sta
->chain_signal_last
[i
];
1855 sinfo
->chain_signal_avg
[i
] =
1856 (s8
) -ewma_read(&sta
->chain_signal_avg
[i
]);
1860 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_BITRATE
))) {
1861 sta_set_rate_info_tx(sta
, &sta
->last_tx_rate
, &sinfo
->txrate
);
1862 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_BITRATE
);
1865 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_RX_BITRATE
))) {
1866 sta_set_rate_info_rx(sta
, &sinfo
->rxrate
);
1867 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_BITRATE
);
1870 sinfo
->filled
|= BIT(NL80211_STA_INFO_TID_STATS
);
1871 for (i
= 0; i
< IEEE80211_NUM_TIDS
+ 1; i
++) {
1872 struct cfg80211_tid_stats
*tidstats
= &sinfo
->pertid
[i
];
1874 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_RX_MSDU
))) {
1875 tidstats
->filled
|= BIT(NL80211_TID_STATS_RX_MSDU
);
1876 tidstats
->rx_msdu
= sta
->rx_msdu
[i
];
1879 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_TX_MSDU
))) {
1880 tidstats
->filled
|= BIT(NL80211_TID_STATS_TX_MSDU
);
1881 tidstats
->tx_msdu
= sta
->tx_msdu
[i
];
1884 if (!(tidstats
->filled
&
1885 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES
)) &&
1886 local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1888 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES
);
1889 tidstats
->tx_msdu_retries
= sta
->tx_msdu_retries
[i
];
1892 if (!(tidstats
->filled
&
1893 BIT(NL80211_TID_STATS_TX_MSDU_FAILED
)) &&
1894 local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1896 BIT(NL80211_TID_STATS_TX_MSDU_FAILED
);
1897 tidstats
->tx_msdu_failed
= sta
->tx_msdu_failed
[i
];
1901 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1902 #ifdef CONFIG_MAC80211_MESH
1903 sinfo
->filled
|= BIT(NL80211_STA_INFO_LLID
) |
1904 BIT(NL80211_STA_INFO_PLID
) |
1905 BIT(NL80211_STA_INFO_PLINK_STATE
) |
1906 BIT(NL80211_STA_INFO_LOCAL_PM
) |
1907 BIT(NL80211_STA_INFO_PEER_PM
) |
1908 BIT(NL80211_STA_INFO_NONPEER_PM
);
1910 sinfo
->llid
= sta
->llid
;
1911 sinfo
->plid
= sta
->plid
;
1912 sinfo
->plink_state
= sta
->plink_state
;
1913 if (test_sta_flag(sta
, WLAN_STA_TOFFSET_KNOWN
)) {
1914 sinfo
->filled
|= BIT(NL80211_STA_INFO_T_OFFSET
);
1915 sinfo
->t_offset
= sta
->t_offset
;
1917 sinfo
->local_pm
= sta
->local_pm
;
1918 sinfo
->peer_pm
= sta
->peer_pm
;
1919 sinfo
->nonpeer_pm
= sta
->nonpeer_pm
;
1923 sinfo
->bss_param
.flags
= 0;
1924 if (sdata
->vif
.bss_conf
.use_cts_prot
)
1925 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_CTS_PROT
;
1926 if (sdata
->vif
.bss_conf
.use_short_preamble
)
1927 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_PREAMBLE
;
1928 if (sdata
->vif
.bss_conf
.use_short_slot
)
1929 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_SLOT_TIME
;
1930 sinfo
->bss_param
.dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
1931 sinfo
->bss_param
.beacon_interval
= sdata
->vif
.bss_conf
.beacon_int
;
1933 sinfo
->sta_flags
.set
= 0;
1934 sinfo
->sta_flags
.mask
= BIT(NL80211_STA_FLAG_AUTHORIZED
) |
1935 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
) |
1936 BIT(NL80211_STA_FLAG_WME
) |
1937 BIT(NL80211_STA_FLAG_MFP
) |
1938 BIT(NL80211_STA_FLAG_AUTHENTICATED
) |
1939 BIT(NL80211_STA_FLAG_ASSOCIATED
) |
1940 BIT(NL80211_STA_FLAG_TDLS_PEER
);
1941 if (test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
1942 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHORIZED
);
1943 if (test_sta_flag(sta
, WLAN_STA_SHORT_PREAMBLE
))
1944 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
);
1946 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_WME
);
1947 if (test_sta_flag(sta
, WLAN_STA_MFP
))
1948 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_MFP
);
1949 if (test_sta_flag(sta
, WLAN_STA_AUTH
))
1950 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHENTICATED
);
1951 if (test_sta_flag(sta
, WLAN_STA_ASSOC
))
1952 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_ASSOCIATED
);
1953 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
))
1954 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_TDLS_PEER
);
1956 /* check if the driver has a SW RC implementation */
1957 if (ref
&& ref
->ops
->get_expected_throughput
)
1958 thr
= ref
->ops
->get_expected_throughput(sta
->rate_ctrl_priv
);
1960 thr
= drv_get_expected_throughput(local
, &sta
->sta
);
1963 sinfo
->filled
|= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT
);
1964 sinfo
->expected_throughput
= thr
;