2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
21 #include <net/mac80211.h>
22 #include "ieee80211_i.h"
23 #include "driver-ops.h"
26 #include "debugfs_sta.h"
31 * DOC: STA information lifetime rules
33 * STA info structures (&struct sta_info) are managed in a hash table
34 * for faster lookup and a list for iteration. They are managed using
35 * RCU, i.e. access to the list and hash table is protected by RCU.
37 * Upon allocating a STA info structure with sta_info_alloc(), the caller
38 * owns that structure. It must then insert it into the hash table using
39 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
40 * case (which acquires an rcu read section but must not be called from
41 * within one) will the pointer still be valid after the call. Note that
42 * the caller may not do much with the STA info before inserting it, in
43 * particular, it may not start any mesh peer link management or add
46 * When the insertion fails (sta_info_insert()) returns non-zero), the
47 * structure will have been freed by sta_info_insert()!
49 * Station entries are added by mac80211 when you establish a link with a
50 * peer. This means different things for the different type of interfaces
51 * we support. For a regular station this mean we add the AP sta when we
52 * receive an association response from the AP. For IBSS this occurs when
53 * get to know about a peer on the same IBSS. For WDS we add the sta for
54 * the peer immediately upon device open. When using AP mode we add stations
55 * for each respective station upon request from userspace through nl80211.
57 * In order to remove a STA info structure, various sta_info_destroy_*()
58 * calls are available.
60 * There is no concept of ownership on a STA entry, each structure is
61 * owned by the global hash table/list until it is removed. All users of
62 * the structure need to be RCU protected so that the structure won't be
63 * freed before they are done using it.
66 /* Caller must hold local->sta_mtx */
67 static int sta_info_hash_del(struct ieee80211_local
*local
,
72 s
= rcu_dereference_protected(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
73 lockdep_is_held(&local
->sta_mtx
));
77 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
82 while (rcu_access_pointer(s
->hnext
) &&
83 rcu_access_pointer(s
->hnext
) != sta
)
84 s
= rcu_dereference_protected(s
->hnext
,
85 lockdep_is_held(&local
->sta_mtx
));
86 if (rcu_access_pointer(s
->hnext
)) {
87 rcu_assign_pointer(s
->hnext
, sta
->hnext
);
94 static void cleanup_single_sta(struct sta_info
*sta
)
97 struct tid_ampdu_tx
*tid_tx
;
98 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
99 struct ieee80211_local
*local
= sdata
->local
;
103 * At this point, when being called as call_rcu callback,
104 * neither mac80211 nor the driver can reference this
105 * sta struct any more except by still existing timers
106 * associated with this station that we clean up below.
108 * Note though that this still uses the sdata and even
109 * calls the driver in AP and mesh mode, so interfaces
110 * of those types mush use call sta_info_flush_cleanup()
111 * (typically via sta_info_flush()) before deconfiguring
114 * In station mode, nothing happens here so it doesn't
115 * have to (and doesn't) do that, this is intentional to
119 if (test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
120 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
121 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
122 ps
= &sdata
->bss
->ps
;
123 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
124 ps
= &sdata
->u
.mesh
.ps
;
128 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
130 atomic_dec(&ps
->num_sta_ps
);
131 sta_info_recalc_tim(sta
);
134 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
135 local
->total_ps_buffered
-= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
136 ieee80211_purge_tx_queue(&local
->hw
, &sta
->ps_tx_buf
[ac
]);
137 ieee80211_purge_tx_queue(&local
->hw
, &sta
->tx_filtered
[ac
]);
140 if (ieee80211_vif_is_mesh(&sdata
->vif
))
141 mesh_sta_cleanup(sta
);
143 cancel_work_sync(&sta
->drv_unblock_wk
);
146 * Destroy aggregation state here. It would be nice to wait for the
147 * driver to finish aggregation stop and then clean up, but for now
148 * drivers have to handle aggregation stop being requested, followed
149 * directly by station destruction.
151 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
152 kfree(sta
->ampdu_mlme
.tid_start_tx
[i
]);
153 tid_tx
= rcu_dereference_raw(sta
->ampdu_mlme
.tid_tx
[i
]);
156 ieee80211_purge_tx_queue(&local
->hw
, &tid_tx
->pending
);
160 sta_info_free(local
, sta
);
163 void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data
*sdata
)
165 struct sta_info
*sta
;
167 spin_lock_bh(&sdata
->cleanup_stations_lock
);
168 while (!list_empty(&sdata
->cleanup_stations
)) {
169 sta
= list_first_entry(&sdata
->cleanup_stations
,
170 struct sta_info
, list
);
171 list_del(&sta
->list
);
172 spin_unlock_bh(&sdata
->cleanup_stations_lock
);
174 cleanup_single_sta(sta
);
176 spin_lock_bh(&sdata
->cleanup_stations_lock
);
179 spin_unlock_bh(&sdata
->cleanup_stations_lock
);
182 static void free_sta_rcu(struct rcu_head
*h
)
184 struct sta_info
*sta
= container_of(h
, struct sta_info
, rcu_head
);
185 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
187 spin_lock(&sdata
->cleanup_stations_lock
);
188 list_add_tail(&sta
->list
, &sdata
->cleanup_stations
);
189 spin_unlock(&sdata
->cleanup_stations_lock
);
191 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->cleanup_stations_wk
);
194 /* protected by RCU */
195 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
198 struct ieee80211_local
*local
= sdata
->local
;
199 struct sta_info
*sta
;
201 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
202 lockdep_is_held(&local
->sta_mtx
));
204 if (sta
->sdata
== sdata
&&
205 ether_addr_equal(sta
->sta
.addr
, addr
))
207 sta
= rcu_dereference_check(sta
->hnext
,
208 lockdep_is_held(&local
->sta_mtx
));
214 * Get sta info either from the specified interface
215 * or from one of its vlans
217 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
220 struct ieee80211_local
*local
= sdata
->local
;
221 struct sta_info
*sta
;
223 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
224 lockdep_is_held(&local
->sta_mtx
));
226 if ((sta
->sdata
== sdata
||
227 (sta
->sdata
->bss
&& sta
->sdata
->bss
== sdata
->bss
)) &&
228 ether_addr_equal(sta
->sta
.addr
, addr
))
230 sta
= rcu_dereference_check(sta
->hnext
,
231 lockdep_is_held(&local
->sta_mtx
));
236 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
239 struct ieee80211_local
*local
= sdata
->local
;
240 struct sta_info
*sta
;
243 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
244 if (sdata
!= sta
->sdata
)
257 * sta_info_free - free STA
259 * @local: pointer to the global information
260 * @sta: STA info to free
262 * This function must undo everything done by sta_info_alloc()
263 * that may happen before sta_info_insert(). It may only be
264 * called when sta_info_insert() has not been attempted (and
265 * if that fails, the station is freed anyway.)
267 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
)
272 rate_control_free_sta(sta
);
275 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
276 kfree(sta
->tx_lat
[i
].bins
);
280 sta_dbg(sta
->sdata
, "Destroyed STA %pM\n", sta
->sta
.addr
);
285 /* Caller must hold local->sta_mtx */
286 static void sta_info_hash_add(struct ieee80211_local
*local
,
287 struct sta_info
*sta
)
289 lockdep_assert_held(&local
->sta_mtx
);
290 sta
->hnext
= local
->sta_hash
[STA_HASH(sta
->sta
.addr
)];
291 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)], sta
);
294 static void sta_unblock(struct work_struct
*wk
)
296 struct sta_info
*sta
;
298 sta
= container_of(wk
, struct sta_info
, drv_unblock_wk
);
303 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
305 ieee80211_sta_ps_deliver_wakeup(sta
);
307 } else if (test_and_clear_sta_flag(sta
, WLAN_STA_PSPOLL
)) {
308 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
311 ieee80211_sta_ps_deliver_poll_response(sta
);
313 } else if (test_and_clear_sta_flag(sta
, WLAN_STA_UAPSD
)) {
314 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
317 ieee80211_sta_ps_deliver_uapsd(sta
);
320 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
323 static int sta_prepare_rate_control(struct ieee80211_local
*local
,
324 struct sta_info
*sta
, gfp_t gfp
)
326 if (local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
)
329 sta
->rate_ctrl
= local
->rate_ctrl
;
330 sta
->rate_ctrl_priv
= rate_control_alloc_sta(sta
->rate_ctrl
,
332 if (!sta
->rate_ctrl_priv
)
338 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
339 const u8
*addr
, gfp_t gfp
)
341 struct ieee80211_local
*local
= sdata
->local
;
342 struct sta_info
*sta
;
343 struct timespec uptime
;
344 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
347 sta
= kzalloc(sizeof(*sta
) + local
->hw
.sta_data_size
, gfp
);
351 spin_lock_init(&sta
->lock
);
352 INIT_WORK(&sta
->drv_unblock_wk
, sta_unblock
);
353 INIT_WORK(&sta
->ampdu_mlme
.work
, ieee80211_ba_session_work
);
354 mutex_init(&sta
->ampdu_mlme
.mtx
);
355 #ifdef CONFIG_MAC80211_MESH
356 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
357 !sdata
->u
.mesh
.user_mpm
)
358 init_timer(&sta
->plink_timer
);
359 sta
->nonpeer_pm
= NL80211_MESH_POWER_ACTIVE
;
362 memcpy(sta
->sta
.addr
, addr
, ETH_ALEN
);
365 sta
->last_rx
= jiffies
;
367 sta
->sta_state
= IEEE80211_STA_NONE
;
369 do_posix_clock_monotonic_gettime(&uptime
);
370 sta
->last_connected
= uptime
.tv_sec
;
371 ewma_init(&sta
->avg_signal
, 1024, 8);
372 for (i
= 0; i
< ARRAY_SIZE(sta
->chain_signal_avg
); i
++)
373 ewma_init(&sta
->chain_signal_avg
[i
], 1024, 8);
375 if (sta_prepare_rate_control(local
, sta
, gfp
)) {
380 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
382 * timer_to_tid must be initialized with identity mapping
383 * to enable session_timer's data differentiation. See
384 * sta_rx_agg_session_timer_expired for usage.
386 sta
->timer_to_tid
[i
] = i
;
388 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
389 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
390 skb_queue_head_init(&sta
->tx_filtered
[i
]);
393 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
394 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
396 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
397 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
398 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
399 struct ieee80211_supported_band
*sband
=
400 local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
401 u8 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
402 IEEE80211_HT_CAP_SM_PS_SHIFT
;
404 * Assume that hostapd advertises our caps in the beacon and
405 * this is the known_smps_mode for a station that just assciated
408 case WLAN_HT_SMPS_CONTROL_DISABLED
:
409 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
411 case WLAN_HT_SMPS_CONTROL_STATIC
:
412 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
414 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
415 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
424 tx_latency
= rcu_dereference(local
->tx_latency
);
425 /* init stations Tx latency statistics && TID bins */
427 sta
->tx_lat
= kzalloc(IEEE80211_NUM_TIDS
*
428 sizeof(struct ieee80211_tx_latency_stat
),
432 * if Tx latency and bins are enabled and the previous allocation
435 if (tx_latency
&& tx_latency
->n_ranges
&& sta
->tx_lat
)
436 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
437 /* size of bins is size of the ranges +1 */
438 sta
->tx_lat
[i
].bin_count
=
439 tx_latency
->n_ranges
+ 1;
440 sta
->tx_lat
[i
].bins
= kcalloc(sta
->tx_lat
[i
].bin_count
,
447 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
452 static int sta_info_insert_check(struct sta_info
*sta
)
454 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
457 * Can't be a WARN_ON because it can be triggered through a race:
458 * something inserts a STA (on one CPU) without holding the RTNL
459 * and another CPU turns off the net device.
461 if (unlikely(!ieee80211_sdata_running(sdata
)))
464 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
465 is_multicast_ether_addr(sta
->sta
.addr
)))
471 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
472 struct ieee80211_sub_if_data
*sdata
,
473 struct sta_info
*sta
)
475 enum ieee80211_sta_state state
;
478 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
479 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
486 * Drivers using legacy sta_add/sta_remove callbacks only
487 * get uploaded set to true after sta_add is called.
489 if (!local
->ops
->sta_add
)
490 sta
->uploaded
= true;
494 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
496 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
497 sta
->sta
.addr
, state
+ 1, err
);
501 /* unwind on error */
502 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
503 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
509 * should be called with sta_mtx locked
510 * this function replaces the mutex lock
513 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
515 struct ieee80211_local
*local
= sta
->local
;
516 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
517 struct station_info sinfo
;
520 lockdep_assert_held(&local
->sta_mtx
);
522 /* check if STA exists already */
523 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
529 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
534 local
->sta_generation
++;
537 /* make the station visible */
538 sta_info_hash_add(local
, sta
);
540 list_add_rcu(&sta
->list
, &local
->sta_list
);
542 set_sta_flag(sta
, WLAN_STA_INSERTED
);
544 ieee80211_recalc_min_chandef(sdata
);
545 ieee80211_sta_debugfs_add(sta
);
546 rate_control_add_sta_debugfs(sta
);
548 memset(&sinfo
, 0, sizeof(sinfo
));
550 sinfo
.generation
= local
->sta_generation
;
551 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
553 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
555 /* move reference to rcu-protected */
557 mutex_unlock(&local
->sta_mtx
);
559 if (ieee80211_vif_is_mesh(&sdata
->vif
))
560 mesh_accept_plinks_update(sdata
);
564 mutex_unlock(&local
->sta_mtx
);
569 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
571 struct ieee80211_local
*local
= sta
->local
;
576 err
= sta_info_insert_check(sta
);
582 mutex_lock(&local
->sta_mtx
);
584 err
= sta_info_insert_finish(sta
);
591 sta_info_free(local
, sta
);
595 int sta_info_insert(struct sta_info
*sta
)
597 int err
= sta_info_insert_rcu(sta
);
604 static inline void __bss_tim_set(u8
*tim
, u16 id
)
607 * This format has been mandated by the IEEE specifications,
608 * so this line may not be changed to use the __set_bit() format.
610 tim
[id
/ 8] |= (1 << (id
% 8));
613 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
616 * This format has been mandated by the IEEE specifications,
617 * so this line may not be changed to use the __clear_bit() format.
619 tim
[id
/ 8] &= ~(1 << (id
% 8));
622 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
625 * This format has been mandated by the IEEE specifications,
626 * so this line may not be changed to use the test_bit() format.
628 return tim
[id
/ 8] & (1 << (id
% 8));
631 static unsigned long ieee80211_tids_for_ac(int ac
)
633 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
635 case IEEE80211_AC_VO
:
636 return BIT(6) | BIT(7);
637 case IEEE80211_AC_VI
:
638 return BIT(4) | BIT(5);
639 case IEEE80211_AC_BE
:
640 return BIT(0) | BIT(3);
641 case IEEE80211_AC_BK
:
642 return BIT(1) | BIT(2);
649 void sta_info_recalc_tim(struct sta_info
*sta
)
651 struct ieee80211_local
*local
= sta
->local
;
653 bool indicate_tim
= false;
654 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
658 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
659 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
660 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
663 ps
= &sta
->sdata
->bss
->ps
;
665 #ifdef CONFIG_MAC80211_MESH
666 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
667 ps
= &sta
->sdata
->u
.mesh
.ps
;
668 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
669 id
= sta
->plid
% (IEEE80211_MAX_AID
+ 1);
675 /* No need to do anything if the driver does all */
676 if (local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
683 * If all ACs are delivery-enabled then we should build
684 * the TIM bit for all ACs anyway; if only some are then
685 * we ignore those and build the TIM bit using only the
688 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
691 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
694 if (ignore_for_tim
& BIT(ac
))
697 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
698 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
702 tids
= ieee80211_tids_for_ac(ac
);
705 sta
->driver_buffered_tids
& tids
;
709 spin_lock_bh(&local
->tim_lock
);
711 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
715 __bss_tim_set(ps
->tim
, id
);
717 __bss_tim_clear(ps
->tim
, id
);
719 if (local
->ops
->set_tim
) {
720 local
->tim_in_locked_section
= true;
721 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
722 local
->tim_in_locked_section
= false;
726 spin_unlock_bh(&local
->tim_lock
);
729 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
731 struct ieee80211_tx_info
*info
;
737 info
= IEEE80211_SKB_CB(skb
);
739 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
740 timeout
= (sta
->listen_interval
*
741 sta
->sdata
->vif
.bss_conf
.beacon_int
*
743 if (timeout
< STA_TX_BUFFER_EXPIRE
)
744 timeout
= STA_TX_BUFFER_EXPIRE
;
745 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
749 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
750 struct sta_info
*sta
, int ac
)
756 * First check for frames that should expire on the filtered
757 * queue. Frames here were rejected by the driver and are on
758 * a separate queue to avoid reordering with normal PS-buffered
759 * frames. They also aren't accounted for right now in the
760 * total_ps_buffered counter.
763 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
764 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
765 if (sta_info_buffer_expired(sta
, skb
))
766 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
769 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
772 * Frames are queued in order, so if this one
773 * hasn't expired yet we can stop testing. If
774 * we actually reached the end of the queue we
775 * also need to stop, of course.
779 ieee80211_free_txskb(&local
->hw
, skb
);
783 * Now also check the normal PS-buffered queue, this will
784 * only find something if the filtered queue was emptied
785 * since the filtered frames are all before the normal PS
789 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
790 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
791 if (sta_info_buffer_expired(sta
, skb
))
792 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
795 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
798 * frames are queued in order, so if this one
799 * hasn't expired yet (or we reached the end of
800 * the queue) we can stop testing
805 local
->total_ps_buffered
--;
806 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
808 ieee80211_free_txskb(&local
->hw
, skb
);
812 * Finally, recalculate the TIM bit for this station -- it might
813 * now be clear because the station was too slow to retrieve its
816 sta_info_recalc_tim(sta
);
819 * Return whether there are any frames still buffered, this is
820 * used to check whether the cleanup timer still needs to run,
821 * if there are no frames we don't need to rearm the timer.
823 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
824 skb_queue_empty(&sta
->tx_filtered
[ac
]));
827 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
828 struct sta_info
*sta
)
830 bool have_buffered
= false;
833 /* This is only necessary for stations on BSS/MBSS interfaces */
834 if (!sta
->sdata
->bss
&&
835 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
838 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
840 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
842 return have_buffered
;
845 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
847 struct ieee80211_local
*local
;
848 struct ieee80211_sub_if_data
*sdata
;
859 lockdep_assert_held(&local
->sta_mtx
);
862 * Before removing the station from the driver and
863 * rate control, it might still start new aggregation
864 * sessions -- block that to make sure the tear-down
865 * will be sufficient.
867 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
868 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
870 ret
= sta_info_hash_del(local
, sta
);
874 list_del_rcu(&sta
->list
);
876 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
878 /* this always calls synchronize_net() */
879 ieee80211_free_sta_keys(local
, sta
);
884 local
->sta_generation
++;
886 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
887 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
889 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
890 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
898 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
899 IEEE80211_STA_NOTEXIST
);
900 WARN_ON_ONCE(ret
!= 0);
903 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
905 cfg80211_del_sta(sdata
->dev
, sta
->sta
.addr
, GFP_KERNEL
);
907 rate_control_remove_sta_debugfs(sta
);
908 ieee80211_sta_debugfs_remove(sta
);
909 ieee80211_recalc_min_chandef(sdata
);
911 call_rcu(&sta
->rcu_head
, free_sta_rcu
);
916 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
918 struct sta_info
*sta
;
921 mutex_lock(&sdata
->local
->sta_mtx
);
922 sta
= sta_info_get(sdata
, addr
);
923 ret
= __sta_info_destroy(sta
);
924 mutex_unlock(&sdata
->local
->sta_mtx
);
929 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
932 struct sta_info
*sta
;
935 mutex_lock(&sdata
->local
->sta_mtx
);
936 sta
= sta_info_get_bss(sdata
, addr
);
937 ret
= __sta_info_destroy(sta
);
938 mutex_unlock(&sdata
->local
->sta_mtx
);
943 static void sta_info_cleanup(unsigned long data
)
945 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
946 struct sta_info
*sta
;
947 bool timer_needed
= false;
950 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
951 if (sta_info_cleanup_expire_buffered(local
, sta
))
955 if (local
->quiescing
)
961 mod_timer(&local
->sta_cleanup
,
962 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
965 void sta_info_init(struct ieee80211_local
*local
)
967 spin_lock_init(&local
->tim_lock
);
968 mutex_init(&local
->sta_mtx
);
969 INIT_LIST_HEAD(&local
->sta_list
);
971 setup_timer(&local
->sta_cleanup
, sta_info_cleanup
,
972 (unsigned long)local
);
975 void sta_info_stop(struct ieee80211_local
*local
)
977 del_timer_sync(&local
->sta_cleanup
);
981 int sta_info_flush_defer(struct ieee80211_sub_if_data
*sdata
)
983 struct ieee80211_local
*local
= sdata
->local
;
984 struct sta_info
*sta
, *tmp
;
989 mutex_lock(&local
->sta_mtx
);
990 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
991 if (sdata
== sta
->sdata
) {
992 WARN_ON(__sta_info_destroy(sta
));
996 mutex_unlock(&local
->sta_mtx
);
1001 void sta_info_flush_cleanup(struct ieee80211_sub_if_data
*sdata
)
1003 ieee80211_cleanup_sdata_stas(sdata
);
1004 cancel_work_sync(&sdata
->cleanup_stations_wk
);
1007 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
1008 unsigned long exp_time
)
1010 struct ieee80211_local
*local
= sdata
->local
;
1011 struct sta_info
*sta
, *tmp
;
1013 mutex_lock(&local
->sta_mtx
);
1015 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1016 if (sdata
!= sta
->sdata
)
1019 if (time_after(jiffies
, sta
->last_rx
+ exp_time
)) {
1020 sta_dbg(sta
->sdata
, "expiring inactive STA %pM\n",
1023 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1024 test_sta_flag(sta
, WLAN_STA_PS_STA
))
1025 atomic_dec(&sdata
->u
.mesh
.ps
.num_sta_ps
);
1027 WARN_ON(__sta_info_destroy(sta
));
1031 mutex_unlock(&local
->sta_mtx
);
1034 struct ieee80211_sta
*ieee80211_find_sta_by_ifaddr(struct ieee80211_hw
*hw
,
1036 const u8
*localaddr
)
1038 struct sta_info
*sta
, *nxt
;
1041 * Just return a random station if localaddr is NULL
1042 * ... first in list.
1044 for_each_sta_info(hw_to_local(hw
), addr
, sta
, nxt
) {
1046 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1055 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1057 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1060 struct sta_info
*sta
;
1065 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1074 EXPORT_SYMBOL(ieee80211_find_sta
);
1076 static void clear_sta_ps_flags(void *_sta
)
1078 struct sta_info
*sta
= _sta
;
1079 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1082 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1083 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1084 ps
= &sdata
->bss
->ps
;
1085 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1086 ps
= &sdata
->u
.mesh
.ps
;
1090 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1091 if (test_and_clear_sta_flag(sta
, WLAN_STA_PS_STA
))
1092 atomic_dec(&ps
->num_sta_ps
);
1095 /* powersave support code */
1096 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
)
1098 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1099 struct ieee80211_local
*local
= sdata
->local
;
1100 struct sk_buff_head pending
;
1101 int filtered
= 0, buffered
= 0, ac
;
1102 unsigned long flags
;
1104 clear_sta_flag(sta
, WLAN_STA_SP
);
1106 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1107 sta
->driver_buffered_tids
= 0;
1109 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1110 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1112 skb_queue_head_init(&pending
);
1114 /* Send all buffered frames to the station */
1115 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1116 int count
= skb_queue_len(&pending
), tmp
;
1118 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1119 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1120 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1121 tmp
= skb_queue_len(&pending
);
1122 filtered
+= tmp
- count
;
1125 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1126 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1127 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1128 tmp
= skb_queue_len(&pending
);
1129 buffered
+= tmp
- count
;
1132 ieee80211_add_pending_skbs_fn(local
, &pending
, clear_sta_ps_flags
, sta
);
1134 /* This station just woke up and isn't aware of our SMPS state */
1135 if (!ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1136 sdata
->smps_mode
) &&
1137 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1138 sta_info_tx_streams(sta
) != 1) {
1140 "%pM just woke up and MIMO capable - update SMPS\n",
1142 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1144 sdata
->vif
.bss_conf
.bssid
);
1147 local
->total_ps_buffered
-= buffered
;
1149 sta_info_recalc_tim(sta
);
1152 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1153 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1156 static void ieee80211_send_null_response(struct ieee80211_sub_if_data
*sdata
,
1157 struct sta_info
*sta
, int tid
,
1158 enum ieee80211_frame_release_type reason
)
1160 struct ieee80211_local
*local
= sdata
->local
;
1161 struct ieee80211_qos_hdr
*nullfunc
;
1162 struct sk_buff
*skb
;
1163 int size
= sizeof(*nullfunc
);
1165 bool qos
= test_sta_flag(sta
, WLAN_STA_WME
);
1166 struct ieee80211_tx_info
*info
;
1167 struct ieee80211_chanctx_conf
*chanctx_conf
;
1170 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1171 IEEE80211_STYPE_QOS_NULLFUNC
|
1172 IEEE80211_FCTL_FROMDS
);
1175 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1176 IEEE80211_STYPE_NULLFUNC
|
1177 IEEE80211_FCTL_FROMDS
);
1180 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1184 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1186 nullfunc
= (void *) skb_put(skb
, size
);
1187 nullfunc
->frame_control
= fc
;
1188 nullfunc
->duration_id
= 0;
1189 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1190 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1191 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1193 skb
->priority
= tid
;
1194 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1196 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1198 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
)
1199 nullfunc
->qos_ctrl
|=
1200 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1203 info
= IEEE80211_SKB_CB(skb
);
1206 * Tell TX path to send this frame even though the
1207 * STA may still remain is PS mode after this frame
1208 * exchange. Also set EOSP to indicate this packet
1209 * ends the poll/service period.
1211 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1212 IEEE80211_TX_CTL_PS_RESPONSE
|
1213 IEEE80211_TX_STATUS_EOSP
|
1214 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1216 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1, reason
, false);
1218 skb
->dev
= sdata
->dev
;
1221 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1222 if (WARN_ON(!chanctx_conf
)) {
1228 ieee80211_xmit(sdata
, skb
, chanctx_conf
->def
.chan
->band
);
1233 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1234 int n_frames
, u8 ignored_acs
,
1235 enum ieee80211_frame_release_type reason
)
1237 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1238 struct ieee80211_local
*local
= sdata
->local
;
1240 bool more_data
= false;
1242 unsigned long driver_release_tids
= 0;
1243 struct sk_buff_head frames
;
1245 /* Service or PS-Poll period starts */
1246 set_sta_flag(sta
, WLAN_STA_SP
);
1248 __skb_queue_head_init(&frames
);
1251 * Get response frame(s) and more data bit for it.
1253 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1256 if (ignored_acs
& BIT(ac
))
1259 tids
= ieee80211_tids_for_ac(ac
);
1262 driver_release_tids
= sta
->driver_buffered_tids
& tids
;
1263 if (driver_release_tids
) {
1266 struct sk_buff
*skb
;
1268 while (n_frames
> 0) {
1269 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1272 &sta
->ps_tx_buf
[ac
]);
1274 local
->total_ps_buffered
--;
1280 __skb_queue_tail(&frames
, skb
);
1285 * If the driver has data on more than one TID then
1286 * certainly there's more data if we release just a
1287 * single frame now (from a single TID).
1289 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1290 hweight16(driver_release_tids
) > 1) {
1292 driver_release_tids
=
1293 BIT(ffs(driver_release_tids
) - 1);
1298 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1299 !skb_queue_empty(&sta
->ps_tx_buf
[ac
])) {
1309 * For PS-Poll, this can only happen due to a race condition
1310 * when we set the TIM bit and the station notices it, but
1311 * before it can poll for the frame we expire it.
1313 * For uAPSD, this is said in the standard (11.2.1.5 h):
1314 * At each unscheduled SP for a non-AP STA, the AP shall
1315 * attempt to transmit at least one MSDU or MMPDU, but no
1316 * more than the value specified in the Max SP Length field
1317 * in the QoS Capability element from delivery-enabled ACs,
1318 * that are destined for the non-AP STA.
1320 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1323 /* This will evaluate to 1, 3, 5 or 7. */
1324 tid
= 7 - ((ffs(~ignored_acs
) - 1) << 1);
1326 ieee80211_send_null_response(sdata
, sta
, tid
, reason
);
1330 if (!driver_release_tids
) {
1331 struct sk_buff_head pending
;
1332 struct sk_buff
*skb
;
1336 skb_queue_head_init(&pending
);
1338 while ((skb
= __skb_dequeue(&frames
))) {
1339 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1340 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1346 * Tell TX path to send this frame even though the
1347 * STA may still remain is PS mode after this frame
1350 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1351 IEEE80211_TX_CTL_PS_RESPONSE
;
1354 * Use MoreData flag to indicate whether there are
1355 * more buffered frames for this STA
1357 if (more_data
|| !skb_queue_empty(&frames
))
1358 hdr
->frame_control
|=
1359 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1361 hdr
->frame_control
&=
1362 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1364 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1365 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1366 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1368 /* end service period after last frame */
1369 if (skb_queue_empty(&frames
)) {
1370 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
&&
1372 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1374 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1375 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1379 tids
|= BIT(*qoshdr
& IEEE80211_QOS_CTL_TID_MASK
);
1383 __skb_queue_tail(&pending
, skb
);
1386 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1389 ieee80211_add_pending_skbs(local
, &pending
);
1391 sta_info_recalc_tim(sta
);
1394 * We need to release a frame that is buffered somewhere in the
1395 * driver ... it'll have to handle that.
1396 * Note that, as per the comment above, it'll also have to see
1397 * if there is more than just one frame on the specific TID that
1398 * we're releasing from, and it needs to set the more-data bit
1399 * accordingly if we tell it that there's no more data. If we do
1400 * tell it there's more data, then of course the more-data bit
1401 * needs to be set anyway.
1403 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1404 n_frames
, reason
, more_data
);
1407 * Note that we don't recalculate the TIM bit here as it would
1408 * most likely have no effect at all unless the driver told us
1409 * that the TID became empty before returning here from the
1411 * Either way, however, when the driver tells us that the TID
1412 * became empty we'll do the TIM recalculation.
1417 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1419 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1422 * If all ACs are delivery-enabled then we should reply
1423 * from any of them, if only some are enabled we reply
1424 * only from the non-enabled ones.
1426 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1427 ignore_for_response
= 0;
1429 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1430 IEEE80211_FRAME_RELEASE_PSPOLL
);
1433 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1435 int n_frames
= sta
->sta
.max_sp
;
1436 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1439 * If we ever grow support for TSPEC this might happen if
1440 * the TSPEC update from hostapd comes in between a trigger
1441 * frame setting WLAN_STA_UAPSD in the RX path and this
1442 * actually getting called.
1444 if (!delivery_enabled
)
1447 switch (sta
->sta
.max_sp
) {
1458 /* XXX: what is a good value? */
1463 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1464 IEEE80211_FRAME_RELEASE_UAPSD
);
1467 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1468 struct ieee80211_sta
*pubsta
, bool block
)
1470 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1472 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1475 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1476 else if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1477 ieee80211_queue_work(hw
, &sta
->drv_unblock_wk
);
1479 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1481 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1483 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1484 struct ieee80211_local
*local
= sta
->local
;
1486 trace_api_eosp(local
, pubsta
);
1488 clear_sta_flag(sta
, WLAN_STA_SP
);
1490 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1492 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1493 u8 tid
, bool buffered
)
1495 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1497 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1501 set_bit(tid
, &sta
->driver_buffered_tids
);
1503 clear_bit(tid
, &sta
->driver_buffered_tids
);
1505 sta_info_recalc_tim(sta
);
1507 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1509 int sta_info_move_state(struct sta_info
*sta
,
1510 enum ieee80211_sta_state new_state
)
1514 if (sta
->sta_state
== new_state
)
1517 /* check allowed transitions first */
1519 switch (new_state
) {
1520 case IEEE80211_STA_NONE
:
1521 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1524 case IEEE80211_STA_AUTH
:
1525 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1526 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1529 case IEEE80211_STA_ASSOC
:
1530 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1531 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1534 case IEEE80211_STA_AUTHORIZED
:
1535 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1539 WARN(1, "invalid state %d", new_state
);
1543 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1544 sta
->sta
.addr
, new_state
);
1547 * notify the driver before the actual changes so it can
1548 * fail the transition
1550 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1551 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1552 sta
->sta_state
, new_state
);
1557 /* reflect the change in all state variables */
1559 switch (new_state
) {
1560 case IEEE80211_STA_NONE
:
1561 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1562 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1564 case IEEE80211_STA_AUTH
:
1565 if (sta
->sta_state
== IEEE80211_STA_NONE
)
1566 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1567 else if (sta
->sta_state
== IEEE80211_STA_ASSOC
)
1568 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1570 case IEEE80211_STA_ASSOC
:
1571 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1572 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1573 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1574 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1575 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1576 !sta
->sdata
->u
.vlan
.sta
))
1577 atomic_dec(&sta
->sdata
->bss
->num_mcast_sta
);
1578 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1581 case IEEE80211_STA_AUTHORIZED
:
1582 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1583 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1584 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1585 !sta
->sdata
->u
.vlan
.sta
))
1586 atomic_inc(&sta
->sdata
->bss
->num_mcast_sta
);
1587 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1594 sta
->sta_state
= new_state
;
1599 u8
sta_info_tx_streams(struct sta_info
*sta
)
1601 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1604 if (!sta
->sta
.ht_cap
.ht_supported
)
1607 if (sta
->sta
.vht_cap
.vht_supported
) {
1610 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1612 for (i
= 7; i
>= 0; i
--)
1613 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1614 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1618 if (ht_cap
->mcs
.rx_mask
[3])
1620 else if (ht_cap
->mcs
.rx_mask
[2])
1622 else if (ht_cap
->mcs
.rx_mask
[1])
1627 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1630 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1631 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;