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
);
119 sta_info_recalc_tim(sta
);
122 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
123 local
->total_ps_buffered
-= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
124 ieee80211_purge_tx_queue(&local
->hw
, &sta
->ps_tx_buf
[ac
]);
125 ieee80211_purge_tx_queue(&local
->hw
, &sta
->tx_filtered
[ac
]);
128 if (ieee80211_vif_is_mesh(&sdata
->vif
))
129 mesh_sta_cleanup(sta
);
131 cancel_work_sync(&sta
->drv_deliver_wk
);
134 * Destroy aggregation state here. It would be nice to wait for the
135 * driver to finish aggregation stop and then clean up, but for now
136 * drivers have to handle aggregation stop being requested, followed
137 * directly by station destruction.
139 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
140 kfree(sta
->ampdu_mlme
.tid_start_tx
[i
]);
141 tid_tx
= rcu_dereference_raw(sta
->ampdu_mlme
.tid_tx
[i
]);
144 ieee80211_purge_tx_queue(&local
->hw
, &tid_tx
->pending
);
149 static void cleanup_single_sta(struct sta_info
*sta
)
151 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
152 struct ieee80211_local
*local
= sdata
->local
;
154 __cleanup_single_sta(sta
);
155 sta_info_free(local
, sta
);
158 /* protected by RCU */
159 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
162 struct ieee80211_local
*local
= sdata
->local
;
163 struct sta_info
*sta
;
165 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
166 lockdep_is_held(&local
->sta_mtx
));
168 if (sta
->sdata
== sdata
&&
169 ether_addr_equal(sta
->sta
.addr
, addr
))
171 sta
= rcu_dereference_check(sta
->hnext
,
172 lockdep_is_held(&local
->sta_mtx
));
178 * Get sta info either from the specified interface
179 * or from one of its vlans
181 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
184 struct ieee80211_local
*local
= sdata
->local
;
185 struct sta_info
*sta
;
187 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
188 lockdep_is_held(&local
->sta_mtx
));
190 if ((sta
->sdata
== sdata
||
191 (sta
->sdata
->bss
&& sta
->sdata
->bss
== sdata
->bss
)) &&
192 ether_addr_equal(sta
->sta
.addr
, addr
))
194 sta
= rcu_dereference_check(sta
->hnext
,
195 lockdep_is_held(&local
->sta_mtx
));
200 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
203 struct ieee80211_local
*local
= sdata
->local
;
204 struct sta_info
*sta
;
207 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
208 if (sdata
!= sta
->sdata
)
221 * sta_info_free - free STA
223 * @local: pointer to the global information
224 * @sta: STA info to free
226 * This function must undo everything done by sta_info_alloc()
227 * that may happen before sta_info_insert(). It may only be
228 * called when sta_info_insert() has not been attempted (and
229 * if that fails, the station is freed anyway.)
231 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
)
236 rate_control_free_sta(sta
);
239 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
240 kfree(sta
->tx_lat
[i
].bins
);
244 sta_dbg(sta
->sdata
, "Destroyed STA %pM\n", sta
->sta
.addr
);
246 kfree(rcu_dereference_raw(sta
->sta
.rates
));
250 /* Caller must hold local->sta_mtx */
251 static void sta_info_hash_add(struct ieee80211_local
*local
,
252 struct sta_info
*sta
)
254 lockdep_assert_held(&local
->sta_mtx
);
255 sta
->hnext
= local
->sta_hash
[STA_HASH(sta
->sta
.addr
)];
256 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)], sta
);
259 static void sta_deliver_ps_frames(struct work_struct
*wk
)
261 struct sta_info
*sta
;
263 sta
= container_of(wk
, struct sta_info
, drv_deliver_wk
);
269 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
))
270 ieee80211_sta_ps_deliver_wakeup(sta
);
271 else if (test_and_clear_sta_flag(sta
, WLAN_STA_PSPOLL
))
272 ieee80211_sta_ps_deliver_poll_response(sta
);
273 else if (test_and_clear_sta_flag(sta
, WLAN_STA_UAPSD
))
274 ieee80211_sta_ps_deliver_uapsd(sta
);
278 static int sta_prepare_rate_control(struct ieee80211_local
*local
,
279 struct sta_info
*sta
, gfp_t gfp
)
281 if (local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
)
284 sta
->rate_ctrl
= local
->rate_ctrl
;
285 sta
->rate_ctrl_priv
= rate_control_alloc_sta(sta
->rate_ctrl
,
287 if (!sta
->rate_ctrl_priv
)
293 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
294 const u8
*addr
, gfp_t gfp
)
296 struct ieee80211_local
*local
= sdata
->local
;
297 struct sta_info
*sta
;
298 struct timespec uptime
;
299 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
302 sta
= kzalloc(sizeof(*sta
) + local
->hw
.sta_data_size
, gfp
);
307 tx_latency
= rcu_dereference(local
->tx_latency
);
308 /* init stations Tx latency statistics && TID bins */
310 sta
->tx_lat
= kzalloc(IEEE80211_NUM_TIDS
*
311 sizeof(struct ieee80211_tx_latency_stat
),
318 if (tx_latency
->n_ranges
) {
319 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
320 /* size of bins is size of the ranges +1 */
321 sta
->tx_lat
[i
].bin_count
=
322 tx_latency
->n_ranges
+ 1;
323 sta
->tx_lat
[i
].bins
=
324 kcalloc(sta
->tx_lat
[i
].bin_count
,
325 sizeof(u32
), GFP_ATOMIC
);
326 if (!sta
->tx_lat
[i
].bins
) {
335 spin_lock_init(&sta
->lock
);
336 spin_lock_init(&sta
->ps_lock
);
337 INIT_WORK(&sta
->drv_deliver_wk
, sta_deliver_ps_frames
);
338 INIT_WORK(&sta
->ampdu_mlme
.work
, ieee80211_ba_session_work
);
339 mutex_init(&sta
->ampdu_mlme
.mtx
);
340 #ifdef CONFIG_MAC80211_MESH
341 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
342 !sdata
->u
.mesh
.user_mpm
)
343 init_timer(&sta
->plink_timer
);
344 sta
->nonpeer_pm
= NL80211_MESH_POWER_ACTIVE
;
347 memcpy(sta
->sta
.addr
, addr
, ETH_ALEN
);
350 sta
->last_rx
= jiffies
;
352 sta
->sta_state
= IEEE80211_STA_NONE
;
354 /* Mark TID as unreserved */
355 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
357 ktime_get_ts(&uptime
);
358 sta
->last_connected
= uptime
.tv_sec
;
359 ewma_init(&sta
->avg_signal
, 1024, 8);
360 for (i
= 0; i
< ARRAY_SIZE(sta
->chain_signal_avg
); i
++)
361 ewma_init(&sta
->chain_signal_avg
[i
], 1024, 8);
363 if (sta_prepare_rate_control(local
, sta
, gfp
))
366 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
368 * timer_to_tid must be initialized with identity mapping
369 * to enable session_timer's data differentiation. See
370 * sta_rx_agg_session_timer_expired for usage.
372 sta
->timer_to_tid
[i
] = i
;
374 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
375 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
376 skb_queue_head_init(&sta
->tx_filtered
[i
]);
379 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
380 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
382 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
383 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
384 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
385 struct ieee80211_supported_band
*sband
=
386 local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
387 u8 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
388 IEEE80211_HT_CAP_SM_PS_SHIFT
;
390 * Assume that hostapd advertises our caps in the beacon and
391 * this is the known_smps_mode for a station that just assciated
394 case WLAN_HT_SMPS_CONTROL_DISABLED
:
395 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
397 case WLAN_HT_SMPS_CONTROL_STATIC
:
398 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
400 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
401 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
408 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
413 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
414 kfree(sta
->tx_lat
[i
].bins
);
421 static int sta_info_insert_check(struct sta_info
*sta
)
423 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
426 * Can't be a WARN_ON because it can be triggered through a race:
427 * something inserts a STA (on one CPU) without holding the RTNL
428 * and another CPU turns off the net device.
430 if (unlikely(!ieee80211_sdata_running(sdata
)))
433 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
434 is_multicast_ether_addr(sta
->sta
.addr
)))
440 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
441 struct ieee80211_sub_if_data
*sdata
,
442 struct sta_info
*sta
)
444 enum ieee80211_sta_state state
;
447 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
448 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
455 * Drivers using legacy sta_add/sta_remove callbacks only
456 * get uploaded set to true after sta_add is called.
458 if (!local
->ops
->sta_add
)
459 sta
->uploaded
= true;
463 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
465 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
466 sta
->sta
.addr
, state
+ 1, err
);
470 /* unwind on error */
471 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
472 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
478 * should be called with sta_mtx locked
479 * this function replaces the mutex lock
482 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
484 struct ieee80211_local
*local
= sta
->local
;
485 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
486 struct station_info sinfo
;
489 lockdep_assert_held(&local
->sta_mtx
);
491 /* check if STA exists already */
492 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
498 local
->sta_generation
++;
501 /* simplify things and don't accept BA sessions yet */
502 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
504 /* make the station visible */
505 sta_info_hash_add(local
, sta
);
507 list_add_tail_rcu(&sta
->list
, &local
->sta_list
);
510 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
514 set_sta_flag(sta
, WLAN_STA_INSERTED
);
515 /* accept BA sessions now */
516 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
518 ieee80211_recalc_min_chandef(sdata
);
519 ieee80211_sta_debugfs_add(sta
);
520 rate_control_add_sta_debugfs(sta
);
522 memset(&sinfo
, 0, sizeof(sinfo
));
524 sinfo
.generation
= local
->sta_generation
;
525 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
527 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
529 /* move reference to rcu-protected */
531 mutex_unlock(&local
->sta_mtx
);
533 if (ieee80211_vif_is_mesh(&sdata
->vif
))
534 mesh_accept_plinks_update(sdata
);
538 sta_info_hash_del(local
, sta
);
539 list_del_rcu(&sta
->list
);
542 __cleanup_single_sta(sta
);
544 mutex_unlock(&local
->sta_mtx
);
549 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
551 struct ieee80211_local
*local
= sta
->local
;
556 err
= sta_info_insert_check(sta
);
562 mutex_lock(&local
->sta_mtx
);
564 err
= sta_info_insert_finish(sta
);
570 sta_info_free(local
, sta
);
574 int sta_info_insert(struct sta_info
*sta
)
576 int err
= sta_info_insert_rcu(sta
);
583 static inline void __bss_tim_set(u8
*tim
, u16 id
)
586 * This format has been mandated by the IEEE specifications,
587 * so this line may not be changed to use the __set_bit() format.
589 tim
[id
/ 8] |= (1 << (id
% 8));
592 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
595 * This format has been mandated by the IEEE specifications,
596 * so this line may not be changed to use the __clear_bit() format.
598 tim
[id
/ 8] &= ~(1 << (id
% 8));
601 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
604 * This format has been mandated by the IEEE specifications,
605 * so this line may not be changed to use the test_bit() format.
607 return tim
[id
/ 8] & (1 << (id
% 8));
610 static unsigned long ieee80211_tids_for_ac(int ac
)
612 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
614 case IEEE80211_AC_VO
:
615 return BIT(6) | BIT(7);
616 case IEEE80211_AC_VI
:
617 return BIT(4) | BIT(5);
618 case IEEE80211_AC_BE
:
619 return BIT(0) | BIT(3);
620 case IEEE80211_AC_BK
:
621 return BIT(1) | BIT(2);
628 void sta_info_recalc_tim(struct sta_info
*sta
)
630 struct ieee80211_local
*local
= sta
->local
;
632 bool indicate_tim
= false;
633 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
637 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
638 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
639 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
642 ps
= &sta
->sdata
->bss
->ps
;
644 #ifdef CONFIG_MAC80211_MESH
645 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
646 ps
= &sta
->sdata
->u
.mesh
.ps
;
647 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
648 id
= sta
->plid
% (IEEE80211_MAX_AID
+ 1);
654 /* No need to do anything if the driver does all */
655 if (local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
662 * If all ACs are delivery-enabled then we should build
663 * the TIM bit for all ACs anyway; if only some are then
664 * we ignore those and build the TIM bit using only the
667 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
670 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
673 if (ignore_for_tim
& BIT(ac
))
676 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
677 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
681 tids
= ieee80211_tids_for_ac(ac
);
684 sta
->driver_buffered_tids
& tids
;
688 spin_lock_bh(&local
->tim_lock
);
690 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
694 __bss_tim_set(ps
->tim
, id
);
696 __bss_tim_clear(ps
->tim
, id
);
698 if (local
->ops
->set_tim
) {
699 local
->tim_in_locked_section
= true;
700 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
701 local
->tim_in_locked_section
= false;
705 spin_unlock_bh(&local
->tim_lock
);
708 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
710 struct ieee80211_tx_info
*info
;
716 info
= IEEE80211_SKB_CB(skb
);
718 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
719 timeout
= (sta
->listen_interval
*
720 sta
->sdata
->vif
.bss_conf
.beacon_int
*
722 if (timeout
< STA_TX_BUFFER_EXPIRE
)
723 timeout
= STA_TX_BUFFER_EXPIRE
;
724 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
728 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
729 struct sta_info
*sta
, int ac
)
735 * First check for frames that should expire on the filtered
736 * queue. Frames here were rejected by the driver and are on
737 * a separate queue to avoid reordering with normal PS-buffered
738 * frames. They also aren't accounted for right now in the
739 * total_ps_buffered counter.
742 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
743 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
744 if (sta_info_buffer_expired(sta
, skb
))
745 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
748 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
751 * Frames are queued in order, so if this one
752 * hasn't expired yet we can stop testing. If
753 * we actually reached the end of the queue we
754 * also need to stop, of course.
758 ieee80211_free_txskb(&local
->hw
, skb
);
762 * Now also check the normal PS-buffered queue, this will
763 * only find something if the filtered queue was emptied
764 * since the filtered frames are all before the normal PS
768 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
769 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
770 if (sta_info_buffer_expired(sta
, skb
))
771 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
774 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
777 * frames are queued in order, so if this one
778 * hasn't expired yet (or we reached the end of
779 * the queue) we can stop testing
784 local
->total_ps_buffered
--;
785 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
787 ieee80211_free_txskb(&local
->hw
, skb
);
791 * Finally, recalculate the TIM bit for this station -- it might
792 * now be clear because the station was too slow to retrieve its
795 sta_info_recalc_tim(sta
);
798 * Return whether there are any frames still buffered, this is
799 * used to check whether the cleanup timer still needs to run,
800 * if there are no frames we don't need to rearm the timer.
802 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
803 skb_queue_empty(&sta
->tx_filtered
[ac
]));
806 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
807 struct sta_info
*sta
)
809 bool have_buffered
= false;
812 /* This is only necessary for stations on BSS/MBSS interfaces */
813 if (!sta
->sdata
->bss
&&
814 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
817 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
819 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
821 return have_buffered
;
824 static int __must_check
__sta_info_destroy_part1(struct sta_info
*sta
)
826 struct ieee80211_local
*local
;
827 struct ieee80211_sub_if_data
*sdata
;
838 lockdep_assert_held(&local
->sta_mtx
);
841 * Before removing the station from the driver and
842 * rate control, it might still start new aggregation
843 * sessions -- block that to make sure the tear-down
844 * will be sufficient.
846 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
847 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
849 ret
= sta_info_hash_del(local
, sta
);
854 * for TDLS peers, make sure to return to the base channel before
857 if (test_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
)) {
858 drv_tdls_cancel_channel_switch(local
, sdata
, &sta
->sta
);
859 clear_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
);
862 list_del_rcu(&sta
->list
);
864 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
866 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
867 rcu_access_pointer(sdata
->u
.vlan
.sta
) == sta
)
868 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
873 static void __sta_info_destroy_part2(struct sta_info
*sta
)
875 struct ieee80211_local
*local
= sta
->local
;
876 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
880 * NOTE: This assumes at least synchronize_net() was done
881 * after _part1 and before _part2!
885 lockdep_assert_held(&local
->sta_mtx
);
887 /* now keys can no longer be reached */
888 ieee80211_free_sta_keys(local
, sta
);
893 local
->sta_generation
++;
895 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
896 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
904 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
905 IEEE80211_STA_NOTEXIST
);
906 WARN_ON_ONCE(ret
!= 0);
909 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
911 cfg80211_del_sta(sdata
->dev
, sta
->sta
.addr
, GFP_KERNEL
);
913 rate_control_remove_sta_debugfs(sta
);
914 ieee80211_sta_debugfs_remove(sta
);
915 ieee80211_recalc_min_chandef(sdata
);
917 cleanup_single_sta(sta
);
920 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
922 int err
= __sta_info_destroy_part1(sta
);
929 __sta_info_destroy_part2(sta
);
934 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
936 struct sta_info
*sta
;
939 mutex_lock(&sdata
->local
->sta_mtx
);
940 sta
= sta_info_get(sdata
, addr
);
941 ret
= __sta_info_destroy(sta
);
942 mutex_unlock(&sdata
->local
->sta_mtx
);
947 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
950 struct sta_info
*sta
;
953 mutex_lock(&sdata
->local
->sta_mtx
);
954 sta
= sta_info_get_bss(sdata
, addr
);
955 ret
= __sta_info_destroy(sta
);
956 mutex_unlock(&sdata
->local
->sta_mtx
);
961 static void sta_info_cleanup(unsigned long data
)
963 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
964 struct sta_info
*sta
;
965 bool timer_needed
= false;
968 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
969 if (sta_info_cleanup_expire_buffered(local
, sta
))
973 if (local
->quiescing
)
979 mod_timer(&local
->sta_cleanup
,
980 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
983 void sta_info_init(struct ieee80211_local
*local
)
985 spin_lock_init(&local
->tim_lock
);
986 mutex_init(&local
->sta_mtx
);
987 INIT_LIST_HEAD(&local
->sta_list
);
989 setup_timer(&local
->sta_cleanup
, sta_info_cleanup
,
990 (unsigned long)local
);
993 void sta_info_stop(struct ieee80211_local
*local
)
995 del_timer_sync(&local
->sta_cleanup
);
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 sta_info
*sta
, *nxt
;
1065 * Just return a random station if localaddr is NULL
1066 * ... first in list.
1068 for_each_sta_info(hw_to_local(hw
), addr
, sta
, nxt
) {
1070 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1079 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1081 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1084 struct sta_info
*sta
;
1089 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1098 EXPORT_SYMBOL(ieee80211_find_sta
);
1100 /* powersave support code */
1101 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
)
1103 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1104 struct ieee80211_local
*local
= sdata
->local
;
1105 struct sk_buff_head pending
;
1106 int filtered
= 0, buffered
= 0, ac
;
1107 unsigned long flags
;
1110 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1111 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1114 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1115 ps
= &sdata
->bss
->ps
;
1116 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1117 ps
= &sdata
->u
.mesh
.ps
;
1121 clear_sta_flag(sta
, WLAN_STA_SP
);
1123 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1124 sta
->driver_buffered_tids
= 0;
1126 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1127 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1129 skb_queue_head_init(&pending
);
1131 /* sync with ieee80211_tx_h_unicast_ps_buf */
1132 spin_lock(&sta
->ps_lock
);
1133 /* Send all buffered frames to the station */
1134 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1135 int count
= skb_queue_len(&pending
), tmp
;
1137 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1138 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1139 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1140 tmp
= skb_queue_len(&pending
);
1141 filtered
+= tmp
- count
;
1144 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1145 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1146 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1147 tmp
= skb_queue_len(&pending
);
1148 buffered
+= tmp
- count
;
1151 ieee80211_add_pending_skbs(local
, &pending
);
1153 /* now we're no longer in the deliver code */
1154 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1156 /* The station might have polled and then woken up before we responded,
1157 * so clear these flags now to avoid them sticking around.
1159 clear_sta_flag(sta
, WLAN_STA_PSPOLL
);
1160 clear_sta_flag(sta
, WLAN_STA_UAPSD
);
1161 spin_unlock(&sta
->ps_lock
);
1163 atomic_dec(&ps
->num_sta_ps
);
1165 /* This station just woke up and isn't aware of our SMPS state */
1166 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1167 !ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1168 sdata
->smps_mode
) &&
1169 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1170 sta_info_tx_streams(sta
) != 1) {
1172 "%pM just woke up and MIMO capable - update SMPS\n",
1174 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1176 sdata
->vif
.bss_conf
.bssid
);
1179 local
->total_ps_buffered
-= buffered
;
1181 sta_info_recalc_tim(sta
);
1184 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1185 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1188 static void ieee80211_send_null_response(struct ieee80211_sub_if_data
*sdata
,
1189 struct sta_info
*sta
, int tid
,
1190 enum ieee80211_frame_release_type reason
,
1193 struct ieee80211_local
*local
= sdata
->local
;
1194 struct ieee80211_qos_hdr
*nullfunc
;
1195 struct sk_buff
*skb
;
1196 int size
= sizeof(*nullfunc
);
1198 bool qos
= sta
->sta
.wme
;
1199 struct ieee80211_tx_info
*info
;
1200 struct ieee80211_chanctx_conf
*chanctx_conf
;
1203 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1204 IEEE80211_STYPE_QOS_NULLFUNC
|
1205 IEEE80211_FCTL_FROMDS
);
1208 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1209 IEEE80211_STYPE_NULLFUNC
|
1210 IEEE80211_FCTL_FROMDS
);
1213 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1217 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1219 nullfunc
= (void *) skb_put(skb
, size
);
1220 nullfunc
->frame_control
= fc
;
1221 nullfunc
->duration_id
= 0;
1222 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1223 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1224 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1225 nullfunc
->seq_ctrl
= 0;
1227 skb
->priority
= tid
;
1228 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1230 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1232 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
)
1233 nullfunc
->qos_ctrl
|=
1234 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1237 info
= IEEE80211_SKB_CB(skb
);
1240 * Tell TX path to send this frame even though the
1241 * STA may still remain is PS mode after this frame
1242 * exchange. Also set EOSP to indicate this packet
1243 * ends the poll/service period.
1245 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1246 IEEE80211_TX_CTL_PS_RESPONSE
|
1247 IEEE80211_TX_STATUS_EOSP
|
1248 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1251 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1,
1254 skb
->dev
= sdata
->dev
;
1257 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1258 if (WARN_ON(!chanctx_conf
)) {
1264 info
->band
= chanctx_conf
->def
.chan
->band
;
1265 ieee80211_xmit(sdata
, skb
);
1269 static int find_highest_prio_tid(unsigned long tids
)
1271 /* lower 3 TIDs aren't ordered perfectly */
1273 return fls(tids
) - 1;
1274 /* TID 0 is BE just like TID 3 */
1277 return fls(tids
) - 1;
1281 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1282 int n_frames
, u8 ignored_acs
,
1283 enum ieee80211_frame_release_type reason
)
1285 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1286 struct ieee80211_local
*local
= sdata
->local
;
1287 bool more_data
= false;
1289 unsigned long driver_release_tids
= 0;
1290 struct sk_buff_head frames
;
1292 /* Service or PS-Poll period starts */
1293 set_sta_flag(sta
, WLAN_STA_SP
);
1295 __skb_queue_head_init(&frames
);
1297 /* Get response frame(s) and more data bit for the last one. */
1298 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1301 if (ignored_acs
& BIT(ac
))
1304 tids
= ieee80211_tids_for_ac(ac
);
1306 /* if we already have frames from software, then we can't also
1307 * release from hardware queues
1309 if (skb_queue_empty(&frames
))
1310 driver_release_tids
|= sta
->driver_buffered_tids
& tids
;
1312 if (driver_release_tids
) {
1313 /* If the driver has data on more than one TID then
1314 * certainly there's more data if we release just a
1315 * single frame now (from a single TID). This will
1316 * only happen for PS-Poll.
1318 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1319 hweight16(driver_release_tids
) > 1) {
1321 driver_release_tids
=
1322 BIT(find_highest_prio_tid(
1323 driver_release_tids
));
1327 struct sk_buff
*skb
;
1329 while (n_frames
> 0) {
1330 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1333 &sta
->ps_tx_buf
[ac
]);
1335 local
->total_ps_buffered
--;
1340 __skb_queue_tail(&frames
, skb
);
1344 /* If we have more frames buffered on this AC, then set the
1345 * more-data bit and abort the loop since we can't send more
1346 * data from other ACs before the buffered frames from this.
1348 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1349 !skb_queue_empty(&sta
->ps_tx_buf
[ac
])) {
1355 if (skb_queue_empty(&frames
) && !driver_release_tids
) {
1359 * For PS-Poll, this can only happen due to a race condition
1360 * when we set the TIM bit and the station notices it, but
1361 * before it can poll for the frame we expire it.
1363 * For uAPSD, this is said in the standard (11.2.1.5 h):
1364 * At each unscheduled SP for a non-AP STA, the AP shall
1365 * attempt to transmit at least one MSDU or MMPDU, but no
1366 * more than the value specified in the Max SP Length field
1367 * in the QoS Capability element from delivery-enabled ACs,
1368 * that are destined for the non-AP STA.
1370 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1373 /* This will evaluate to 1, 3, 5 or 7. */
1374 tid
= 7 - ((ffs(~ignored_acs
) - 1) << 1);
1376 ieee80211_send_null_response(sdata
, sta
, tid
, reason
, true);
1377 } else if (!driver_release_tids
) {
1378 struct sk_buff_head pending
;
1379 struct sk_buff
*skb
;
1382 bool need_null
= false;
1384 skb_queue_head_init(&pending
);
1386 while ((skb
= __skb_dequeue(&frames
))) {
1387 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1388 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1394 * Tell TX path to send this frame even though the
1395 * STA may still remain is PS mode after this frame
1398 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1399 IEEE80211_TX_CTL_PS_RESPONSE
;
1402 * Use MoreData flag to indicate whether there are
1403 * more buffered frames for this STA
1405 if (more_data
|| !skb_queue_empty(&frames
))
1406 hdr
->frame_control
|=
1407 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1409 hdr
->frame_control
&=
1410 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1412 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1413 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1414 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1416 tids
|= BIT(skb
->priority
);
1418 __skb_queue_tail(&pending
, skb
);
1420 /* end service period after last frame or add one */
1421 if (!skb_queue_empty(&frames
))
1424 if (reason
!= IEEE80211_FRAME_RELEASE_UAPSD
) {
1425 /* for PS-Poll, there's only one frame */
1426 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1427 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1431 /* For uAPSD, things are a bit more complicated. If the
1432 * last frame has a QoS header (i.e. is a QoS-data or
1433 * QoS-nulldata frame) then just set the EOSP bit there
1435 * If the frame doesn't have a QoS header (which means
1436 * it should be a bufferable MMPDU) then we can't set
1437 * the EOSP bit in the QoS header; add a QoS-nulldata
1438 * frame to the list to send it after the MMPDU.
1440 * Note that this code is only in the mac80211-release
1441 * code path, we assume that the driver will not buffer
1442 * anything but QoS-data frames, or if it does, will
1443 * create the QoS-nulldata frame by itself if needed.
1445 * Cf. 802.11-2012 10.2.1.10 (c).
1448 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1450 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1451 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1453 /* The standard isn't completely clear on this
1454 * as it says the more-data bit should be set
1455 * if there are more BUs. The QoS-Null frame
1456 * we're about to send isn't buffered yet, we
1457 * only create it below, but let's pretend it
1458 * was buffered just in case some clients only
1459 * expect more-data=0 when eosp=1.
1461 hdr
->frame_control
|=
1462 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1469 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1472 ieee80211_add_pending_skbs(local
, &pending
);
1475 ieee80211_send_null_response(
1476 sdata
, sta
, find_highest_prio_tid(tids
),
1479 sta_info_recalc_tim(sta
);
1482 * We need to release a frame that is buffered somewhere in the
1483 * driver ... it'll have to handle that.
1484 * Note that the driver also has to check the number of frames
1485 * on the TIDs we're releasing from - if there are more than
1486 * n_frames it has to set the more-data bit (if we didn't ask
1487 * it to set it anyway due to other buffered frames); if there
1488 * are fewer than n_frames it has to make sure to adjust that
1489 * to allow the service period to end properly.
1491 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1492 n_frames
, reason
, more_data
);
1495 * Note that we don't recalculate the TIM bit here as it would
1496 * most likely have no effect at all unless the driver told us
1497 * that the TID(s) became empty before returning here from the
1499 * Either way, however, when the driver tells us that the TID(s)
1500 * became empty we'll do the TIM recalculation.
1505 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1507 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1510 * If all ACs are delivery-enabled then we should reply
1511 * from any of them, if only some are enabled we reply
1512 * only from the non-enabled ones.
1514 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1515 ignore_for_response
= 0;
1517 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1518 IEEE80211_FRAME_RELEASE_PSPOLL
);
1521 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1523 int n_frames
= sta
->sta
.max_sp
;
1524 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1527 * If we ever grow support for TSPEC this might happen if
1528 * the TSPEC update from hostapd comes in between a trigger
1529 * frame setting WLAN_STA_UAPSD in the RX path and this
1530 * actually getting called.
1532 if (!delivery_enabled
)
1535 switch (sta
->sta
.max_sp
) {
1546 /* XXX: what is a good value? */
1551 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1552 IEEE80211_FRAME_RELEASE_UAPSD
);
1555 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1556 struct ieee80211_sta
*pubsta
, bool block
)
1558 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1560 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1563 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1567 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1570 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1571 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1572 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1573 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1574 } else if (test_sta_flag(sta
, WLAN_STA_PSPOLL
) ||
1575 test_sta_flag(sta
, WLAN_STA_UAPSD
)) {
1576 /* must be asleep in this case */
1577 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1578 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1580 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1583 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1585 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1587 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1588 struct ieee80211_local
*local
= sta
->local
;
1590 trace_api_eosp(local
, pubsta
);
1592 clear_sta_flag(sta
, WLAN_STA_SP
);
1594 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1596 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1597 u8 tid
, bool buffered
)
1599 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1601 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1604 trace_api_sta_set_buffered(sta
->local
, pubsta
, tid
, buffered
);
1607 set_bit(tid
, &sta
->driver_buffered_tids
);
1609 clear_bit(tid
, &sta
->driver_buffered_tids
);
1611 sta_info_recalc_tim(sta
);
1613 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1615 int sta_info_move_state(struct sta_info
*sta
,
1616 enum ieee80211_sta_state new_state
)
1620 if (sta
->sta_state
== new_state
)
1623 /* check allowed transitions first */
1625 switch (new_state
) {
1626 case IEEE80211_STA_NONE
:
1627 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1630 case IEEE80211_STA_AUTH
:
1631 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1632 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1635 case IEEE80211_STA_ASSOC
:
1636 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1637 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1640 case IEEE80211_STA_AUTHORIZED
:
1641 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1645 WARN(1, "invalid state %d", new_state
);
1649 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1650 sta
->sta
.addr
, new_state
);
1653 * notify the driver before the actual changes so it can
1654 * fail the transition
1656 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1657 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1658 sta
->sta_state
, new_state
);
1663 /* reflect the change in all state variables */
1665 switch (new_state
) {
1666 case IEEE80211_STA_NONE
:
1667 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1668 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1670 case IEEE80211_STA_AUTH
:
1671 if (sta
->sta_state
== IEEE80211_STA_NONE
)
1672 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1673 else if (sta
->sta_state
== IEEE80211_STA_ASSOC
)
1674 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1676 case IEEE80211_STA_ASSOC
:
1677 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1678 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1679 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1680 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1681 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1682 !sta
->sdata
->u
.vlan
.sta
))
1683 atomic_dec(&sta
->sdata
->bss
->num_mcast_sta
);
1684 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1687 case IEEE80211_STA_AUTHORIZED
:
1688 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1689 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1690 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1691 !sta
->sdata
->u
.vlan
.sta
))
1692 atomic_inc(&sta
->sdata
->bss
->num_mcast_sta
);
1693 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1700 sta
->sta_state
= new_state
;
1705 u8
sta_info_tx_streams(struct sta_info
*sta
)
1707 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1710 if (!sta
->sta
.ht_cap
.ht_supported
)
1713 if (sta
->sta
.vht_cap
.vht_supported
) {
1716 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1718 for (i
= 7; i
>= 0; i
--)
1719 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1720 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1724 if (ht_cap
->mcs
.rx_mask
[3])
1726 else if (ht_cap
->mcs
.rx_mask
[2])
1728 else if (ht_cap
->mcs
.rx_mask
[1])
1733 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1736 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1737 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;
1740 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
)
1742 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1743 struct ieee80211_local
*local
= sdata
->local
;
1744 struct rate_control_ref
*ref
= NULL
;
1745 struct timespec uptime
;
1750 if (test_sta_flag(sta
, WLAN_STA_RATE_CONTROL
))
1751 ref
= local
->rate_ctrl
;
1753 sinfo
->generation
= sdata
->local
->sta_generation
;
1755 sinfo
->filled
= STATION_INFO_INACTIVE_TIME
|
1756 STATION_INFO_RX_BYTES64
|
1757 STATION_INFO_TX_BYTES64
|
1758 STATION_INFO_RX_PACKETS
|
1759 STATION_INFO_TX_PACKETS
|
1760 STATION_INFO_TX_RETRIES
|
1761 STATION_INFO_TX_FAILED
|
1762 STATION_INFO_TX_BITRATE
|
1763 STATION_INFO_RX_BITRATE
|
1764 STATION_INFO_RX_DROP_MISC
|
1765 STATION_INFO_BSS_PARAM
|
1766 STATION_INFO_CONNECTED_TIME
|
1767 STATION_INFO_STA_FLAGS
|
1768 STATION_INFO_BEACON_LOSS_COUNT
;
1770 ktime_get_ts(&uptime
);
1771 sinfo
->connected_time
= uptime
.tv_sec
- sta
->last_connected
;
1773 sinfo
->inactive_time
= jiffies_to_msecs(jiffies
- sta
->last_rx
);
1774 sinfo
->tx_bytes
= 0;
1775 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1776 sinfo
->tx_bytes
+= sta
->tx_bytes
[ac
];
1777 packets
+= sta
->tx_packets
[ac
];
1779 sinfo
->tx_packets
= packets
;
1780 sinfo
->rx_bytes
= sta
->rx_bytes
;
1781 sinfo
->rx_packets
= sta
->rx_packets
;
1782 sinfo
->tx_retries
= sta
->tx_retry_count
;
1783 sinfo
->tx_failed
= sta
->tx_retry_failed
;
1784 sinfo
->rx_dropped_misc
= sta
->rx_dropped
;
1785 sinfo
->beacon_loss_count
= sta
->beacon_loss_count
;
1787 if ((sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
) ||
1788 (sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)) {
1789 sinfo
->filled
|= STATION_INFO_SIGNAL
| STATION_INFO_SIGNAL_AVG
;
1790 if (!local
->ops
->get_rssi
||
1791 drv_get_rssi(local
, sdata
, &sta
->sta
, &sinfo
->signal
))
1792 sinfo
->signal
= (s8
)sta
->last_signal
;
1793 sinfo
->signal_avg
= (s8
) -ewma_read(&sta
->avg_signal
);
1796 sinfo
->filled
|= STATION_INFO_CHAIN_SIGNAL
|
1797 STATION_INFO_CHAIN_SIGNAL_AVG
;
1799 sinfo
->chains
= sta
->chains
;
1800 for (i
= 0; i
< ARRAY_SIZE(sinfo
->chain_signal
); i
++) {
1801 sinfo
->chain_signal
[i
] = sta
->chain_signal_last
[i
];
1802 sinfo
->chain_signal_avg
[i
] =
1803 (s8
) -ewma_read(&sta
->chain_signal_avg
[i
]);
1807 sta_set_rate_info_tx(sta
, &sta
->last_tx_rate
, &sinfo
->txrate
);
1808 sta_set_rate_info_rx(sta
, &sinfo
->rxrate
);
1810 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1811 #ifdef CONFIG_MAC80211_MESH
1812 sinfo
->filled
|= STATION_INFO_LLID
|
1814 STATION_INFO_PLINK_STATE
|
1815 STATION_INFO_LOCAL_PM
|
1816 STATION_INFO_PEER_PM
|
1817 STATION_INFO_NONPEER_PM
;
1819 sinfo
->llid
= sta
->llid
;
1820 sinfo
->plid
= sta
->plid
;
1821 sinfo
->plink_state
= sta
->plink_state
;
1822 if (test_sta_flag(sta
, WLAN_STA_TOFFSET_KNOWN
)) {
1823 sinfo
->filled
|= STATION_INFO_T_OFFSET
;
1824 sinfo
->t_offset
= sta
->t_offset
;
1826 sinfo
->local_pm
= sta
->local_pm
;
1827 sinfo
->peer_pm
= sta
->peer_pm
;
1828 sinfo
->nonpeer_pm
= sta
->nonpeer_pm
;
1832 sinfo
->bss_param
.flags
= 0;
1833 if (sdata
->vif
.bss_conf
.use_cts_prot
)
1834 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_CTS_PROT
;
1835 if (sdata
->vif
.bss_conf
.use_short_preamble
)
1836 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_PREAMBLE
;
1837 if (sdata
->vif
.bss_conf
.use_short_slot
)
1838 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_SLOT_TIME
;
1839 sinfo
->bss_param
.dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
1840 sinfo
->bss_param
.beacon_interval
= sdata
->vif
.bss_conf
.beacon_int
;
1842 sinfo
->sta_flags
.set
= 0;
1843 sinfo
->sta_flags
.mask
= BIT(NL80211_STA_FLAG_AUTHORIZED
) |
1844 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
) |
1845 BIT(NL80211_STA_FLAG_WME
) |
1846 BIT(NL80211_STA_FLAG_MFP
) |
1847 BIT(NL80211_STA_FLAG_AUTHENTICATED
) |
1848 BIT(NL80211_STA_FLAG_ASSOCIATED
) |
1849 BIT(NL80211_STA_FLAG_TDLS_PEER
);
1850 if (test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
1851 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHORIZED
);
1852 if (test_sta_flag(sta
, WLAN_STA_SHORT_PREAMBLE
))
1853 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
);
1855 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_WME
);
1856 if (test_sta_flag(sta
, WLAN_STA_MFP
))
1857 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_MFP
);
1858 if (test_sta_flag(sta
, WLAN_STA_AUTH
))
1859 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHENTICATED
);
1860 if (test_sta_flag(sta
, WLAN_STA_ASSOC
))
1861 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_ASSOCIATED
);
1862 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
))
1863 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_TDLS_PEER
);
1865 /* check if the driver has a SW RC implementation */
1866 if (ref
&& ref
->ops
->get_expected_throughput
)
1867 thr
= ref
->ops
->get_expected_throughput(sta
->rate_ctrl_priv
);
1869 thr
= drv_get_expected_throughput(local
, &sta
->sta
);
1872 sinfo
->filled
|= STATION_INFO_EXPECTED_THROUGHPUT
;
1873 sinfo
->expected_throughput
= thr
;