2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
21 #include <net/mac80211.h>
22 #include "ieee80211_i.h"
23 #include "driver-ops.h"
26 #include "debugfs_sta.h"
31 * DOC: STA information lifetime rules
33 * STA info structures (&struct sta_info) are managed in a hash table
34 * for faster lookup and a list for iteration. They are managed using
35 * RCU, i.e. access to the list and hash table is protected by RCU.
37 * Upon allocating a STA info structure with sta_info_alloc(), the caller
38 * owns that structure. It must then insert it into the hash table using
39 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
40 * case (which acquires an rcu read section but must not be called from
41 * within one) will the pointer still be valid after the call. Note that
42 * the caller may not do much with the STA info before inserting it, in
43 * particular, it may not start any mesh peer link management or add
46 * When the insertion fails (sta_info_insert()) returns non-zero), the
47 * structure will have been freed by sta_info_insert()!
49 * Station entries are added by mac80211 when you establish a link with a
50 * peer. This means different things for the different type of interfaces
51 * we support. For a regular station this mean we add the AP sta when we
52 * receive an association response from the AP. For IBSS this occurs when
53 * get to know about a peer on the same IBSS. For WDS we add the sta for
54 * the peer immediately upon device open. When using AP mode we add stations
55 * for each respective station upon request from userspace through nl80211.
57 * In order to remove a STA info structure, various sta_info_destroy_*()
58 * calls are available.
60 * There is no concept of ownership on a STA entry, each structure is
61 * owned by the global hash table/list until it is removed. All users of
62 * the structure need to be RCU protected so that the structure won't be
63 * freed before they are done using it.
66 /* Caller must hold local->sta_mtx */
67 static int sta_info_hash_del(struct ieee80211_local
*local
,
72 s
= rcu_dereference_protected(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
73 lockdep_is_held(&local
->sta_mtx
));
77 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
82 while (rcu_access_pointer(s
->hnext
) &&
83 rcu_access_pointer(s
->hnext
) != sta
)
84 s
= rcu_dereference_protected(s
->hnext
,
85 lockdep_is_held(&local
->sta_mtx
));
86 if (rcu_access_pointer(s
->hnext
)) {
87 rcu_assign_pointer(s
->hnext
, sta
->hnext
);
94 static void __cleanup_single_sta(struct sta_info
*sta
)
97 struct tid_ampdu_tx
*tid_tx
;
98 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
99 struct ieee80211_local
*local
= sdata
->local
;
102 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
103 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
)) {
104 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
105 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
106 ps
= &sdata
->bss
->ps
;
107 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
108 ps
= &sdata
->u
.mesh
.ps
;
112 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
113 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
115 atomic_dec(&ps
->num_sta_ps
);
116 sta_info_recalc_tim(sta
);
119 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
120 local
->total_ps_buffered
-= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
121 ieee80211_purge_tx_queue(&local
->hw
, &sta
->ps_tx_buf
[ac
]);
122 ieee80211_purge_tx_queue(&local
->hw
, &sta
->tx_filtered
[ac
]);
125 if (ieee80211_vif_is_mesh(&sdata
->vif
))
126 mesh_sta_cleanup(sta
);
128 cancel_work_sync(&sta
->drv_unblock_wk
);
131 * Destroy aggregation state here. It would be nice to wait for the
132 * driver to finish aggregation stop and then clean up, but for now
133 * drivers have to handle aggregation stop being requested, followed
134 * directly by station destruction.
136 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
137 kfree(sta
->ampdu_mlme
.tid_start_tx
[i
]);
138 tid_tx
= rcu_dereference_raw(sta
->ampdu_mlme
.tid_tx
[i
]);
141 ieee80211_purge_tx_queue(&local
->hw
, &tid_tx
->pending
);
146 static void cleanup_single_sta(struct sta_info
*sta
)
148 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
149 struct ieee80211_local
*local
= sdata
->local
;
151 __cleanup_single_sta(sta
);
152 sta_info_free(local
, sta
);
155 /* protected by RCU */
156 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
159 struct ieee80211_local
*local
= sdata
->local
;
160 struct sta_info
*sta
;
162 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
163 lockdep_is_held(&local
->sta_mtx
));
165 if (sta
->sdata
== sdata
&&
166 ether_addr_equal(sta
->sta
.addr
, addr
))
168 sta
= rcu_dereference_check(sta
->hnext
,
169 lockdep_is_held(&local
->sta_mtx
));
175 * Get sta info either from the specified interface
176 * or from one of its vlans
178 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
181 struct ieee80211_local
*local
= sdata
->local
;
182 struct sta_info
*sta
;
184 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
185 lockdep_is_held(&local
->sta_mtx
));
187 if ((sta
->sdata
== sdata
||
188 (sta
->sdata
->bss
&& sta
->sdata
->bss
== sdata
->bss
)) &&
189 ether_addr_equal(sta
->sta
.addr
, addr
))
191 sta
= rcu_dereference_check(sta
->hnext
,
192 lockdep_is_held(&local
->sta_mtx
));
197 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
200 struct ieee80211_local
*local
= sdata
->local
;
201 struct sta_info
*sta
;
204 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
205 if (sdata
!= sta
->sdata
)
218 * sta_info_free - free STA
220 * @local: pointer to the global information
221 * @sta: STA info to free
223 * This function must undo everything done by sta_info_alloc()
224 * that may happen before sta_info_insert(). It may only be
225 * called when sta_info_insert() has not been attempted (and
226 * if that fails, the station is freed anyway.)
228 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
)
233 rate_control_free_sta(sta
);
236 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
237 kfree(sta
->tx_lat
[i
].bins
);
241 sta_dbg(sta
->sdata
, "Destroyed STA %pM\n", sta
->sta
.addr
);
243 kfree(rcu_dereference_raw(sta
->sta
.rates
));
247 /* Caller must hold local->sta_mtx */
248 static void sta_info_hash_add(struct ieee80211_local
*local
,
249 struct sta_info
*sta
)
251 lockdep_assert_held(&local
->sta_mtx
);
252 sta
->hnext
= local
->sta_hash
[STA_HASH(sta
->sta
.addr
)];
253 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)], sta
);
256 static void sta_unblock(struct work_struct
*wk
)
258 struct sta_info
*sta
;
260 sta
= container_of(wk
, struct sta_info
, drv_unblock_wk
);
265 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
267 ieee80211_sta_ps_deliver_wakeup(sta
);
269 } else if (test_and_clear_sta_flag(sta
, WLAN_STA_PSPOLL
)) {
270 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
273 ieee80211_sta_ps_deliver_poll_response(sta
);
275 } else if (test_and_clear_sta_flag(sta
, WLAN_STA_UAPSD
)) {
276 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
279 ieee80211_sta_ps_deliver_uapsd(sta
);
282 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
285 static int sta_prepare_rate_control(struct ieee80211_local
*local
,
286 struct sta_info
*sta
, gfp_t gfp
)
288 if (local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
)
291 sta
->rate_ctrl
= local
->rate_ctrl
;
292 sta
->rate_ctrl_priv
= rate_control_alloc_sta(sta
->rate_ctrl
,
294 if (!sta
->rate_ctrl_priv
)
300 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
301 const u8
*addr
, gfp_t gfp
)
303 struct ieee80211_local
*local
= sdata
->local
;
304 struct sta_info
*sta
;
305 struct timespec uptime
;
306 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
309 sta
= kzalloc(sizeof(*sta
) + local
->hw
.sta_data_size
, gfp
);
314 tx_latency
= rcu_dereference(local
->tx_latency
);
315 /* init stations Tx latency statistics && TID bins */
317 sta
->tx_lat
= kzalloc(IEEE80211_NUM_TIDS
*
318 sizeof(struct ieee80211_tx_latency_stat
),
325 if (tx_latency
->n_ranges
) {
326 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
327 /* size of bins is size of the ranges +1 */
328 sta
->tx_lat
[i
].bin_count
=
329 tx_latency
->n_ranges
+ 1;
330 sta
->tx_lat
[i
].bins
=
331 kcalloc(sta
->tx_lat
[i
].bin_count
,
332 sizeof(u32
), GFP_ATOMIC
);
333 if (!sta
->tx_lat
[i
].bins
) {
342 spin_lock_init(&sta
->lock
);
343 spin_lock_init(&sta
->ps_lock
);
344 INIT_WORK(&sta
->drv_unblock_wk
, sta_unblock
);
345 INIT_WORK(&sta
->ampdu_mlme
.work
, ieee80211_ba_session_work
);
346 mutex_init(&sta
->ampdu_mlme
.mtx
);
347 #ifdef CONFIG_MAC80211_MESH
348 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
349 !sdata
->u
.mesh
.user_mpm
)
350 init_timer(&sta
->plink_timer
);
351 sta
->nonpeer_pm
= NL80211_MESH_POWER_ACTIVE
;
354 memcpy(sta
->sta
.addr
, addr
, ETH_ALEN
);
357 sta
->last_rx
= jiffies
;
359 sta
->sta_state
= IEEE80211_STA_NONE
;
361 do_posix_clock_monotonic_gettime(&uptime
);
362 sta
->last_connected
= uptime
.tv_sec
;
363 ewma_init(&sta
->avg_signal
, 1024, 8);
364 for (i
= 0; i
< ARRAY_SIZE(sta
->chain_signal_avg
); i
++)
365 ewma_init(&sta
->chain_signal_avg
[i
], 1024, 8);
367 if (sta_prepare_rate_control(local
, sta
, gfp
))
370 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
372 * timer_to_tid must be initialized with identity mapping
373 * to enable session_timer's data differentiation. See
374 * sta_rx_agg_session_timer_expired for usage.
376 sta
->timer_to_tid
[i
] = i
;
378 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
379 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
380 skb_queue_head_init(&sta
->tx_filtered
[i
]);
383 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
384 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
386 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
387 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
388 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
389 struct ieee80211_supported_band
*sband
=
390 local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
391 u8 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
392 IEEE80211_HT_CAP_SM_PS_SHIFT
;
394 * Assume that hostapd advertises our caps in the beacon and
395 * this is the known_smps_mode for a station that just assciated
398 case WLAN_HT_SMPS_CONTROL_DISABLED
:
399 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
401 case WLAN_HT_SMPS_CONTROL_STATIC
:
402 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
404 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
405 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
412 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
417 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
418 kfree(sta
->tx_lat
[i
].bins
);
425 static int sta_info_insert_check(struct sta_info
*sta
)
427 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
430 * Can't be a WARN_ON because it can be triggered through a race:
431 * something inserts a STA (on one CPU) without holding the RTNL
432 * and another CPU turns off the net device.
434 if (unlikely(!ieee80211_sdata_running(sdata
)))
437 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
438 is_multicast_ether_addr(sta
->sta
.addr
)))
444 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
445 struct ieee80211_sub_if_data
*sdata
,
446 struct sta_info
*sta
)
448 enum ieee80211_sta_state state
;
451 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
452 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
459 * Drivers using legacy sta_add/sta_remove callbacks only
460 * get uploaded set to true after sta_add is called.
462 if (!local
->ops
->sta_add
)
463 sta
->uploaded
= true;
467 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
469 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
470 sta
->sta
.addr
, state
+ 1, err
);
474 /* unwind on error */
475 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
476 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
482 * should be called with sta_mtx locked
483 * this function replaces the mutex lock
486 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
488 struct ieee80211_local
*local
= sta
->local
;
489 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
490 struct station_info sinfo
;
493 lockdep_assert_held(&local
->sta_mtx
);
495 /* check if STA exists already */
496 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
502 local
->sta_generation
++;
505 /* simplify things and don't accept BA sessions yet */
506 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
508 /* make the station visible */
509 sta_info_hash_add(local
, sta
);
511 list_add_rcu(&sta
->list
, &local
->sta_list
);
514 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
518 set_sta_flag(sta
, WLAN_STA_INSERTED
);
519 /* accept BA sessions now */
520 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
522 ieee80211_recalc_min_chandef(sdata
);
523 ieee80211_sta_debugfs_add(sta
);
524 rate_control_add_sta_debugfs(sta
);
526 memset(&sinfo
, 0, sizeof(sinfo
));
528 sinfo
.generation
= local
->sta_generation
;
529 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
531 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
533 /* move reference to rcu-protected */
535 mutex_unlock(&local
->sta_mtx
);
537 if (ieee80211_vif_is_mesh(&sdata
->vif
))
538 mesh_accept_plinks_update(sdata
);
542 sta_info_hash_del(local
, sta
);
543 list_del_rcu(&sta
->list
);
546 __cleanup_single_sta(sta
);
548 mutex_unlock(&local
->sta_mtx
);
553 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
555 struct ieee80211_local
*local
= sta
->local
;
560 err
= sta_info_insert_check(sta
);
566 mutex_lock(&local
->sta_mtx
);
568 err
= sta_info_insert_finish(sta
);
574 sta_info_free(local
, sta
);
578 int sta_info_insert(struct sta_info
*sta
)
580 int err
= sta_info_insert_rcu(sta
);
587 static inline void __bss_tim_set(u8
*tim
, u16 id
)
590 * This format has been mandated by the IEEE specifications,
591 * so this line may not be changed to use the __set_bit() format.
593 tim
[id
/ 8] |= (1 << (id
% 8));
596 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
599 * This format has been mandated by the IEEE specifications,
600 * so this line may not be changed to use the __clear_bit() format.
602 tim
[id
/ 8] &= ~(1 << (id
% 8));
605 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
608 * This format has been mandated by the IEEE specifications,
609 * so this line may not be changed to use the test_bit() format.
611 return tim
[id
/ 8] & (1 << (id
% 8));
614 static unsigned long ieee80211_tids_for_ac(int ac
)
616 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
618 case IEEE80211_AC_VO
:
619 return BIT(6) | BIT(7);
620 case IEEE80211_AC_VI
:
621 return BIT(4) | BIT(5);
622 case IEEE80211_AC_BE
:
623 return BIT(0) | BIT(3);
624 case IEEE80211_AC_BK
:
625 return BIT(1) | BIT(2);
632 void sta_info_recalc_tim(struct sta_info
*sta
)
634 struct ieee80211_local
*local
= sta
->local
;
636 bool indicate_tim
= false;
637 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
641 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
642 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
643 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
646 ps
= &sta
->sdata
->bss
->ps
;
648 #ifdef CONFIG_MAC80211_MESH
649 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
650 ps
= &sta
->sdata
->u
.mesh
.ps
;
651 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
652 id
= sta
->plid
% (IEEE80211_MAX_AID
+ 1);
658 /* No need to do anything if the driver does all */
659 if (local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
666 * If all ACs are delivery-enabled then we should build
667 * the TIM bit for all ACs anyway; if only some are then
668 * we ignore those and build the TIM bit using only the
671 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
674 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
677 if (ignore_for_tim
& BIT(ac
))
680 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
681 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
685 tids
= ieee80211_tids_for_ac(ac
);
688 sta
->driver_buffered_tids
& tids
;
692 spin_lock_bh(&local
->tim_lock
);
694 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
698 __bss_tim_set(ps
->tim
, id
);
700 __bss_tim_clear(ps
->tim
, id
);
702 if (local
->ops
->set_tim
) {
703 local
->tim_in_locked_section
= true;
704 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
705 local
->tim_in_locked_section
= false;
709 spin_unlock_bh(&local
->tim_lock
);
712 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
714 struct ieee80211_tx_info
*info
;
720 info
= IEEE80211_SKB_CB(skb
);
722 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
723 timeout
= (sta
->listen_interval
*
724 sta
->sdata
->vif
.bss_conf
.beacon_int
*
726 if (timeout
< STA_TX_BUFFER_EXPIRE
)
727 timeout
= STA_TX_BUFFER_EXPIRE
;
728 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
732 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
733 struct sta_info
*sta
, int ac
)
739 * First check for frames that should expire on the filtered
740 * queue. Frames here were rejected by the driver and are on
741 * a separate queue to avoid reordering with normal PS-buffered
742 * frames. They also aren't accounted for right now in the
743 * total_ps_buffered counter.
746 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
747 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
748 if (sta_info_buffer_expired(sta
, skb
))
749 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
752 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
755 * Frames are queued in order, so if this one
756 * hasn't expired yet we can stop testing. If
757 * we actually reached the end of the queue we
758 * also need to stop, of course.
762 ieee80211_free_txskb(&local
->hw
, skb
);
766 * Now also check the normal PS-buffered queue, this will
767 * only find something if the filtered queue was emptied
768 * since the filtered frames are all before the normal PS
772 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
773 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
774 if (sta_info_buffer_expired(sta
, skb
))
775 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
778 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
781 * frames are queued in order, so if this one
782 * hasn't expired yet (or we reached the end of
783 * the queue) we can stop testing
788 local
->total_ps_buffered
--;
789 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
791 ieee80211_free_txskb(&local
->hw
, skb
);
795 * Finally, recalculate the TIM bit for this station -- it might
796 * now be clear because the station was too slow to retrieve its
799 sta_info_recalc_tim(sta
);
802 * Return whether there are any frames still buffered, this is
803 * used to check whether the cleanup timer still needs to run,
804 * if there are no frames we don't need to rearm the timer.
806 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
807 skb_queue_empty(&sta
->tx_filtered
[ac
]));
810 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
811 struct sta_info
*sta
)
813 bool have_buffered
= false;
816 /* This is only necessary for stations on BSS/MBSS interfaces */
817 if (!sta
->sdata
->bss
&&
818 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
821 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
823 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
825 return have_buffered
;
828 static int __must_check
__sta_info_destroy_part1(struct sta_info
*sta
)
830 struct ieee80211_local
*local
;
831 struct ieee80211_sub_if_data
*sdata
;
842 lockdep_assert_held(&local
->sta_mtx
);
845 * Before removing the station from the driver and
846 * rate control, it might still start new aggregation
847 * sessions -- block that to make sure the tear-down
848 * will be sufficient.
850 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
851 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
853 ret
= sta_info_hash_del(local
, sta
);
857 list_del_rcu(&sta
->list
);
859 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
861 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
862 rcu_access_pointer(sdata
->u
.vlan
.sta
) == sta
)
863 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
868 static void __sta_info_destroy_part2(struct sta_info
*sta
)
870 struct ieee80211_local
*local
= sta
->local
;
871 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
875 * NOTE: This assumes at least synchronize_net() was done
876 * after _part1 and before _part2!
880 lockdep_assert_held(&local
->sta_mtx
);
882 /* now keys can no longer be reached */
883 ieee80211_free_sta_keys(local
, sta
);
888 local
->sta_generation
++;
890 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
891 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
899 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
900 IEEE80211_STA_NOTEXIST
);
901 WARN_ON_ONCE(ret
!= 0);
904 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
906 cfg80211_del_sta(sdata
->dev
, sta
->sta
.addr
, GFP_KERNEL
);
908 rate_control_remove_sta_debugfs(sta
);
909 ieee80211_sta_debugfs_remove(sta
);
910 ieee80211_recalc_min_chandef(sdata
);
912 cleanup_single_sta(sta
);
915 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
917 int err
= __sta_info_destroy_part1(sta
);
924 __sta_info_destroy_part2(sta
);
929 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
931 struct sta_info
*sta
;
934 mutex_lock(&sdata
->local
->sta_mtx
);
935 sta
= sta_info_get(sdata
, addr
);
936 ret
= __sta_info_destroy(sta
);
937 mutex_unlock(&sdata
->local
->sta_mtx
);
942 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
945 struct sta_info
*sta
;
948 mutex_lock(&sdata
->local
->sta_mtx
);
949 sta
= sta_info_get_bss(sdata
, addr
);
950 ret
= __sta_info_destroy(sta
);
951 mutex_unlock(&sdata
->local
->sta_mtx
);
956 static void sta_info_cleanup(unsigned long data
)
958 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
959 struct sta_info
*sta
;
960 bool timer_needed
= false;
963 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
964 if (sta_info_cleanup_expire_buffered(local
, sta
))
968 if (local
->quiescing
)
974 mod_timer(&local
->sta_cleanup
,
975 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
978 void sta_info_init(struct ieee80211_local
*local
)
980 spin_lock_init(&local
->tim_lock
);
981 mutex_init(&local
->sta_mtx
);
982 INIT_LIST_HEAD(&local
->sta_list
);
984 setup_timer(&local
->sta_cleanup
, sta_info_cleanup
,
985 (unsigned long)local
);
988 void sta_info_stop(struct ieee80211_local
*local
)
990 del_timer_sync(&local
->sta_cleanup
);
994 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
)
996 struct ieee80211_local
*local
= sdata
->local
;
997 struct sta_info
*sta
, *tmp
;
998 LIST_HEAD(free_list
);
1003 WARN_ON(vlans
&& sdata
->vif
.type
!= NL80211_IFTYPE_AP
);
1004 WARN_ON(vlans
&& !sdata
->bss
);
1006 mutex_lock(&local
->sta_mtx
);
1007 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1008 if (sdata
== sta
->sdata
||
1009 (vlans
&& sdata
->bss
== sta
->sdata
->bss
)) {
1010 if (!WARN_ON(__sta_info_destroy_part1(sta
)))
1011 list_add(&sta
->free_list
, &free_list
);
1016 if (!list_empty(&free_list
)) {
1018 list_for_each_entry_safe(sta
, tmp
, &free_list
, free_list
)
1019 __sta_info_destroy_part2(sta
);
1021 mutex_unlock(&local
->sta_mtx
);
1026 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
1027 unsigned long exp_time
)
1029 struct ieee80211_local
*local
= sdata
->local
;
1030 struct sta_info
*sta
, *tmp
;
1032 mutex_lock(&local
->sta_mtx
);
1034 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1035 if (sdata
!= sta
->sdata
)
1038 if (time_after(jiffies
, sta
->last_rx
+ exp_time
)) {
1039 sta_dbg(sta
->sdata
, "expiring inactive STA %pM\n",
1042 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1043 test_sta_flag(sta
, WLAN_STA_PS_STA
))
1044 atomic_dec(&sdata
->u
.mesh
.ps
.num_sta_ps
);
1046 WARN_ON(__sta_info_destroy(sta
));
1050 mutex_unlock(&local
->sta_mtx
);
1053 struct ieee80211_sta
*ieee80211_find_sta_by_ifaddr(struct ieee80211_hw
*hw
,
1055 const u8
*localaddr
)
1057 struct sta_info
*sta
, *nxt
;
1060 * Just return a random station if localaddr is NULL
1061 * ... first in list.
1063 for_each_sta_info(hw_to_local(hw
), addr
, sta
, nxt
) {
1065 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1074 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1076 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1079 struct sta_info
*sta
;
1084 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1093 EXPORT_SYMBOL(ieee80211_find_sta
);
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
;
1105 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1106 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1107 ps
= &sdata
->bss
->ps
;
1108 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1109 ps
= &sdata
->u
.mesh
.ps
;
1113 clear_sta_flag(sta
, WLAN_STA_SP
);
1115 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1116 sta
->driver_buffered_tids
= 0;
1118 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1119 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1121 skb_queue_head_init(&pending
);
1123 /* sync with ieee80211_tx_h_unicast_ps_buf */
1124 spin_lock(&sta
->ps_lock
);
1125 /* Send all buffered frames to the station */
1126 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1127 int count
= skb_queue_len(&pending
), tmp
;
1129 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1130 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1131 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1132 tmp
= skb_queue_len(&pending
);
1133 filtered
+= tmp
- count
;
1136 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1137 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1138 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1139 tmp
= skb_queue_len(&pending
);
1140 buffered
+= tmp
- count
;
1143 ieee80211_add_pending_skbs(local
, &pending
);
1144 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1145 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
1146 spin_unlock(&sta
->ps_lock
);
1148 atomic_dec(&ps
->num_sta_ps
);
1150 /* This station just woke up and isn't aware of our SMPS state */
1151 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1152 !ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1153 sdata
->smps_mode
) &&
1154 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1155 sta_info_tx_streams(sta
) != 1) {
1157 "%pM just woke up and MIMO capable - update SMPS\n",
1159 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1161 sdata
->vif
.bss_conf
.bssid
);
1164 local
->total_ps_buffered
-= buffered
;
1166 sta_info_recalc_tim(sta
);
1169 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1170 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1173 static void ieee80211_send_null_response(struct ieee80211_sub_if_data
*sdata
,
1174 struct sta_info
*sta
, int tid
,
1175 enum ieee80211_frame_release_type reason
,
1178 struct ieee80211_local
*local
= sdata
->local
;
1179 struct ieee80211_qos_hdr
*nullfunc
;
1180 struct sk_buff
*skb
;
1181 int size
= sizeof(*nullfunc
);
1183 bool qos
= test_sta_flag(sta
, WLAN_STA_WME
);
1184 struct ieee80211_tx_info
*info
;
1185 struct ieee80211_chanctx_conf
*chanctx_conf
;
1188 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1189 IEEE80211_STYPE_QOS_NULLFUNC
|
1190 IEEE80211_FCTL_FROMDS
);
1193 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1194 IEEE80211_STYPE_NULLFUNC
|
1195 IEEE80211_FCTL_FROMDS
);
1198 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1202 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1204 nullfunc
= (void *) skb_put(skb
, size
);
1205 nullfunc
->frame_control
= fc
;
1206 nullfunc
->duration_id
= 0;
1207 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1208 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1209 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1210 nullfunc
->seq_ctrl
= 0;
1212 skb
->priority
= tid
;
1213 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1215 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1217 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
)
1218 nullfunc
->qos_ctrl
|=
1219 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1222 info
= IEEE80211_SKB_CB(skb
);
1225 * Tell TX path to send this frame even though the
1226 * STA may still remain is PS mode after this frame
1227 * exchange. Also set EOSP to indicate this packet
1228 * ends the poll/service period.
1230 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1231 IEEE80211_TX_CTL_PS_RESPONSE
|
1232 IEEE80211_TX_STATUS_EOSP
|
1233 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1236 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1,
1239 skb
->dev
= sdata
->dev
;
1242 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1243 if (WARN_ON(!chanctx_conf
)) {
1249 ieee80211_xmit(sdata
, skb
, chanctx_conf
->def
.chan
->band
);
1253 static int find_highest_prio_tid(unsigned long tids
)
1255 /* lower 3 TIDs aren't ordered perfectly */
1257 return fls(tids
) - 1;
1258 /* TID 0 is BE just like TID 3 */
1261 return fls(tids
) - 1;
1265 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1266 int n_frames
, u8 ignored_acs
,
1267 enum ieee80211_frame_release_type reason
)
1269 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1270 struct ieee80211_local
*local
= sdata
->local
;
1271 bool more_data
= false;
1273 unsigned long driver_release_tids
= 0;
1274 struct sk_buff_head frames
;
1276 /* Service or PS-Poll period starts */
1277 set_sta_flag(sta
, WLAN_STA_SP
);
1279 __skb_queue_head_init(&frames
);
1281 /* Get response frame(s) and more data bit for the last one. */
1282 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1285 if (ignored_acs
& BIT(ac
))
1288 tids
= ieee80211_tids_for_ac(ac
);
1290 /* if we already have frames from software, then we can't also
1291 * release from hardware queues
1293 if (skb_queue_empty(&frames
))
1294 driver_release_tids
|= sta
->driver_buffered_tids
& tids
;
1296 if (driver_release_tids
) {
1297 /* If the driver has data on more than one TID then
1298 * certainly there's more data if we release just a
1299 * single frame now (from a single TID). This will
1300 * only happen for PS-Poll.
1302 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1303 hweight16(driver_release_tids
) > 1) {
1305 driver_release_tids
=
1306 BIT(find_highest_prio_tid(
1307 driver_release_tids
));
1311 struct sk_buff
*skb
;
1313 while (n_frames
> 0) {
1314 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1317 &sta
->ps_tx_buf
[ac
]);
1319 local
->total_ps_buffered
--;
1324 __skb_queue_tail(&frames
, skb
);
1328 /* If we have more frames buffered on this AC, then set the
1329 * more-data bit and abort the loop since we can't send more
1330 * data from other ACs before the buffered frames from this.
1332 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1333 !skb_queue_empty(&sta
->ps_tx_buf
[ac
])) {
1339 if (skb_queue_empty(&frames
) && !driver_release_tids
) {
1343 * For PS-Poll, this can only happen due to a race condition
1344 * when we set the TIM bit and the station notices it, but
1345 * before it can poll for the frame we expire it.
1347 * For uAPSD, this is said in the standard (11.2.1.5 h):
1348 * At each unscheduled SP for a non-AP STA, the AP shall
1349 * attempt to transmit at least one MSDU or MMPDU, but no
1350 * more than the value specified in the Max SP Length field
1351 * in the QoS Capability element from delivery-enabled ACs,
1352 * that are destined for the non-AP STA.
1354 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1357 /* This will evaluate to 1, 3, 5 or 7. */
1358 tid
= 7 - ((ffs(~ignored_acs
) - 1) << 1);
1360 ieee80211_send_null_response(sdata
, sta
, tid
, reason
, true);
1361 } else if (!driver_release_tids
) {
1362 struct sk_buff_head pending
;
1363 struct sk_buff
*skb
;
1366 bool need_null
= false;
1368 skb_queue_head_init(&pending
);
1370 while ((skb
= __skb_dequeue(&frames
))) {
1371 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1372 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1378 * Tell TX path to send this frame even though the
1379 * STA may still remain is PS mode after this frame
1382 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1383 IEEE80211_TX_CTL_PS_RESPONSE
;
1386 * Use MoreData flag to indicate whether there are
1387 * more buffered frames for this STA
1389 if (more_data
|| !skb_queue_empty(&frames
))
1390 hdr
->frame_control
|=
1391 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1393 hdr
->frame_control
&=
1394 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1396 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1397 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1398 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1400 tids
|= BIT(skb
->priority
);
1402 __skb_queue_tail(&pending
, skb
);
1404 /* end service period after last frame or add one */
1405 if (!skb_queue_empty(&frames
))
1408 if (reason
!= IEEE80211_FRAME_RELEASE_UAPSD
) {
1409 /* for PS-Poll, there's only one frame */
1410 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1411 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1415 /* For uAPSD, things are a bit more complicated. If the
1416 * last frame has a QoS header (i.e. is a QoS-data or
1417 * QoS-nulldata frame) then just set the EOSP bit there
1419 * If the frame doesn't have a QoS header (which means
1420 * it should be a bufferable MMPDU) then we can't set
1421 * the EOSP bit in the QoS header; add a QoS-nulldata
1422 * frame to the list to send it after the MMPDU.
1424 * Note that this code is only in the mac80211-release
1425 * code path, we assume that the driver will not buffer
1426 * anything but QoS-data frames, or if it does, will
1427 * create the QoS-nulldata frame by itself if needed.
1429 * Cf. 802.11-2012 10.2.1.10 (c).
1432 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1434 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1435 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1437 /* The standard isn't completely clear on this
1438 * as it says the more-data bit should be set
1439 * if there are more BUs. The QoS-Null frame
1440 * we're about to send isn't buffered yet, we
1441 * only create it below, but let's pretend it
1442 * was buffered just in case some clients only
1443 * expect more-data=0 when eosp=1.
1445 hdr
->frame_control
|=
1446 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1453 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1456 ieee80211_add_pending_skbs(local
, &pending
);
1459 ieee80211_send_null_response(
1460 sdata
, sta
, find_highest_prio_tid(tids
),
1463 sta_info_recalc_tim(sta
);
1466 * We need to release a frame that is buffered somewhere in the
1467 * driver ... it'll have to handle that.
1468 * Note that the driver also has to check the number of frames
1469 * on the TIDs we're releasing from - if there are more than
1470 * n_frames it has to set the more-data bit (if we didn't ask
1471 * it to set it anyway due to other buffered frames); if there
1472 * are fewer than n_frames it has to make sure to adjust that
1473 * to allow the service period to end properly.
1475 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1476 n_frames
, reason
, more_data
);
1479 * Note that we don't recalculate the TIM bit here as it would
1480 * most likely have no effect at all unless the driver told us
1481 * that the TID(s) became empty before returning here from the
1483 * Either way, however, when the driver tells us that the TID(s)
1484 * became empty we'll do the TIM recalculation.
1489 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1491 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1494 * If all ACs are delivery-enabled then we should reply
1495 * from any of them, if only some are enabled we reply
1496 * only from the non-enabled ones.
1498 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1499 ignore_for_response
= 0;
1501 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1502 IEEE80211_FRAME_RELEASE_PSPOLL
);
1505 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1507 int n_frames
= sta
->sta
.max_sp
;
1508 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1511 * If we ever grow support for TSPEC this might happen if
1512 * the TSPEC update from hostapd comes in between a trigger
1513 * frame setting WLAN_STA_UAPSD in the RX path and this
1514 * actually getting called.
1516 if (!delivery_enabled
)
1519 switch (sta
->sta
.max_sp
) {
1530 /* XXX: what is a good value? */
1535 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1536 IEEE80211_FRAME_RELEASE_UAPSD
);
1539 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1540 struct ieee80211_sta
*pubsta
, bool block
)
1542 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1544 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1547 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1548 else if (test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1549 ieee80211_queue_work(hw
, &sta
->drv_unblock_wk
);
1551 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1553 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1555 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1556 struct ieee80211_local
*local
= sta
->local
;
1558 trace_api_eosp(local
, pubsta
);
1560 clear_sta_flag(sta
, WLAN_STA_SP
);
1562 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1564 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1565 u8 tid
, bool buffered
)
1567 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1569 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1572 trace_api_sta_set_buffered(sta
->local
, pubsta
, tid
, buffered
);
1575 set_bit(tid
, &sta
->driver_buffered_tids
);
1577 clear_bit(tid
, &sta
->driver_buffered_tids
);
1579 sta_info_recalc_tim(sta
);
1581 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1583 int sta_info_move_state(struct sta_info
*sta
,
1584 enum ieee80211_sta_state new_state
)
1588 if (sta
->sta_state
== new_state
)
1591 /* check allowed transitions first */
1593 switch (new_state
) {
1594 case IEEE80211_STA_NONE
:
1595 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1598 case IEEE80211_STA_AUTH
:
1599 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1600 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1603 case IEEE80211_STA_ASSOC
:
1604 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1605 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1608 case IEEE80211_STA_AUTHORIZED
:
1609 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1613 WARN(1, "invalid state %d", new_state
);
1617 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1618 sta
->sta
.addr
, new_state
);
1621 * notify the driver before the actual changes so it can
1622 * fail the transition
1624 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1625 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1626 sta
->sta_state
, new_state
);
1631 /* reflect the change in all state variables */
1633 switch (new_state
) {
1634 case IEEE80211_STA_NONE
:
1635 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1636 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1638 case IEEE80211_STA_AUTH
:
1639 if (sta
->sta_state
== IEEE80211_STA_NONE
)
1640 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1641 else if (sta
->sta_state
== IEEE80211_STA_ASSOC
)
1642 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1644 case IEEE80211_STA_ASSOC
:
1645 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1646 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1647 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1648 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1649 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1650 !sta
->sdata
->u
.vlan
.sta
))
1651 atomic_dec(&sta
->sdata
->bss
->num_mcast_sta
);
1652 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1655 case IEEE80211_STA_AUTHORIZED
:
1656 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1657 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1658 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1659 !sta
->sdata
->u
.vlan
.sta
))
1660 atomic_inc(&sta
->sdata
->bss
->num_mcast_sta
);
1661 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1668 sta
->sta_state
= new_state
;
1673 u8
sta_info_tx_streams(struct sta_info
*sta
)
1675 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1678 if (!sta
->sta
.ht_cap
.ht_supported
)
1681 if (sta
->sta
.vht_cap
.vht_supported
) {
1684 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1686 for (i
= 7; i
>= 0; i
--)
1687 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1688 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1692 if (ht_cap
->mcs
.rx_mask
[3])
1694 else if (ht_cap
->mcs
.rx_mask
[2])
1696 else if (ht_cap
->mcs
.rx_mask
[1])
1701 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1704 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1705 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;