Quelle sta_info.c
Sprache: C
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2002 - 2005 , Instant802 Networks , Inc .
* Copyright 2006 - 2007 Jiri Benc < jbenc @ suse . cz >
* Copyright 2013 - 2014 Intel Mobile Communications GmbH
* Copyright ( C ) 2015 - 2017 Intel Deutschland GmbH
* Copyright ( C ) 2018 - 2025 Intel Corporation
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/timer.h>
#include <linux/rtnetlink.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "sta_info.h"
#include "debugfs_sta.h"
#include "mesh.h"
#include "wme.h"
/**
* DOC : STA information lifetime rules
*
* STA info structures ( & struct sta_info ) are managed in a hash table
* for faster lookup and a list for iteration . They are managed using
* RCU , i . e . access to the list and hash table is protected by RCU .
*
* Upon allocating a STA info structure with sta_info_alloc ( ) , the caller
* owns that structure . It must then insert it into the hash table using
* either sta_info_insert ( ) or sta_info_insert_rcu ( ) ; only in the latter
* case ( which acquires an rcu read section but must not be called from
* within one ) will the pointer still be valid after the call . Note that
* the caller may not do much with the STA info before inserting it ; in
* particular , it may not start any mesh peer link management or add
* encryption keys .
*
* When the insertion fails ( sta_info_insert ( ) ) returns non - zero ) , the
* structure will have been freed by sta_info_insert ( ) !
*
* Station entries are added by mac80211 when you establish a link with a
* peer . This means different things for the different type of interfaces
* we support . For a regular station this mean we add the AP sta when we
* receive an association response from the AP . For IBSS this occurs when
* get to know about a peer on the same IBSS . For WDS we add the sta for
* the peer immediately upon device open . When using AP mode we add stations
* for each respective station upon request from userspace through nl80211 .
*
* In order to remove a STA info structure , various sta_info_destroy_ * ( )
* calls are available .
*
* There is no concept of ownership on a STA entry ; each structure is
* owned by the global hash table / list until it is removed . All users of
* the structure need to be RCU protected so that the structure won ' t be
* freed before they are done using it .
*/
struct sta_link_alloc {
struct link_sta_info info;
struct ieee80211_link_sta sta;
struct rcu_head rcu_head;
};
static const struct rhashtable_params sta_rht_params = {
.nelem_hint = 3 , /* start small */
.automatic_shrinking = true ,
.head_offset = offsetof(struct sta_info, hash_node),
.key_offset = offsetof(struct sta_info, addr),
.key_len = ETH_ALEN,
.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
};
static const struct rhashtable_params link_sta_rht_params = {
.nelem_hint = 3 , /* start small */
.automatic_shrinking = true ,
.head_offset = offsetof(struct link_sta_info, link_hash_node),
.key_offset = offsetof(struct link_sta_info, addr),
.key_len = ETH_ALEN,
.max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
};
static int sta_info_hash_del(struct ieee80211_local *local,
struct sta_info *sta)
{
return rhltable_remove(&local->sta_hash, &sta->hash_node,
sta_rht_params);
}
static int link_sta_info_hash_add(struct ieee80211_local *local,
struct link_sta_info *link_sta)
{
lockdep_assert_wiphy(local->hw.wiphy);
return rhltable_insert(&local->link_sta_hash,
&link_sta->link_hash_node, link_sta_rht_params);
}
static int link_sta_info_hash_del(struct ieee80211_local *local,
struct link_sta_info *link_sta)
{
lockdep_assert_wiphy(local->hw.wiphy);
return rhltable_remove(&local->link_sta_hash,
&link_sta->link_hash_node, link_sta_rht_params);
}
void ieee80211_purge_sta_txqs(struct sta_info *sta)
{
struct ieee80211_local *local = sta->sdata->local;
int i;
for (i = 0 ; i < ARRAY_SIZE(sta->sta.txq); i++) {
struct txq_info *txqi;
if (!sta->sta.txq[i])
continue ;
txqi = to_txq_info(sta->sta.txq[i]);
ieee80211_txq_purge(local, txqi);
}
}
static void __cleanup_single_sta(struct sta_info *sta)
{
int ac, i;
struct tid_ampdu_tx *tid_tx;
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
struct ps_data *ps;
if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
ps = &sdata->bss->ps;
else if (ieee80211_vif_is_mesh(&sdata->vif))
ps = &sdata->u.mesh.ps;
else
return ;
clear_sta_flag(sta, WLAN_STA_PS_STA);
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
atomic_dec(&ps->num_sta_ps);
}
ieee80211_purge_sta_txqs(sta);
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
}
if (ieee80211_vif_is_mesh(&sdata->vif))
mesh_sta_cleanup(sta);
cancel_work_sync(&sta->drv_deliver_wk);
/*
* Destroy aggregation state here . It would be nice to wait for the
* driver to finish aggregation stop and then clean up , but for now
* drivers have to handle aggregation stop being requested , followed
* directly by station destruction .
*/
for (i = 0 ; i < IEEE80211_NUM_TIDS; i++) {
kfree(sta->ampdu_mlme.tid_start_tx[i]);
tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
if (!tid_tx)
continue ;
ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
kfree(tid_tx);
}
}
static void cleanup_single_sta(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
__cleanup_single_sta(sta);
sta_info_free(local, sta);
}
struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
const u8 *addr)
{
return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
}
/* protected by RCU */
struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct ieee80211_local *local = sdata->local;
struct rhlist_head *tmp;
struct sta_info *sta;
rcu_read_lock();
for_each_sta_info(local, addr, sta, tmp) {
if (sta->sdata == sdata) {
rcu_read_unlock();
/* this is safe as the caller must already hold
* another rcu read section or the mutex
*/
return sta;
}
}
rcu_read_unlock();
return NULL;
}
/*
* Get sta info either from the specified interface
* or from one of its vlans
*/
struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct ieee80211_local *local = sdata->local;
struct rhlist_head *tmp;
struct sta_info *sta;
rcu_read_lock();
for_each_sta_info(local, addr, sta, tmp) {
if (sta->sdata == sdata ||
(sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
rcu_read_unlock();
/* this is safe as the caller must already hold
* another rcu read section or the mutex
*/
return sta;
}
}
rcu_read_unlock();
return NULL;
}
struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local,
const u8 *addr)
{
return rhltable_lookup(&local->link_sta_hash, addr,
link_sta_rht_params);
}
struct link_sta_info *
link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr)
{
struct ieee80211_local *local = sdata->local;
struct rhlist_head *tmp;
struct link_sta_info *link_sta;
rcu_read_lock();
for_each_link_sta_info(local, addr, link_sta, tmp) {
struct sta_info *sta = link_sta->sta;
if (sta->sdata == sdata ||
(sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
rcu_read_unlock();
/* this is safe as the caller must already hold
* another rcu read section or the mutex
*/
return link_sta;
}
}
rcu_read_unlock();
return NULL;
}
struct ieee80211_sta *
ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw,
const u8 *addr,
const u8 *localaddr,
unsigned int *link_id)
{
struct ieee80211_local *local = hw_to_local(hw);
struct link_sta_info *link_sta;
struct rhlist_head *tmp;
for_each_link_sta_info(local, addr, link_sta, tmp) {
struct sta_info *sta = link_sta->sta;
struct ieee80211_link_data *link;
u8 _link_id = link_sta->link_id;
if (!localaddr) {
if (link_id)
*link_id = _link_id;
return &sta->sta;
}
link = rcu_dereference(sta->sdata->link[_link_id]);
if (!link)
continue ;
if (memcmp(link->conf->addr, localaddr, ETH_ALEN))
continue ;
if (link_id)
*link_id = _link_id;
return &sta->sta;
}
return NULL;
}
EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs);
struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
const u8 *sta_addr, const u8 *vif_addr)
{
struct rhlist_head *tmp;
struct sta_info *sta;
for_each_sta_info(local, sta_addr, sta, tmp) {
if (ether_addr_equal(vif_addr, sta->sdata->vif.addr))
return sta;
}
return NULL;
}
struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
int idx)
{
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
int i = 0 ;
list_for_each_entry_rcu(sta, &local->sta_list, list,
lockdep_is_held(&local->hw.wiphy->mtx)) {
if (sdata != sta->sdata)
continue ;
if (i < idx) {
++i;
continue ;
}
return sta;
}
return NULL;
}
static void sta_info_free_link(struct link_sta_info *link_sta)
{
free_percpu(link_sta->pcpu_rx_stats);
}
static void sta_accumulate_removed_link_stats(struct sta_info *sta, int link_id)
{
struct link_sta_info *link_sta = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
struct ieee80211_link_data *link;
int ac, tid;
u32 thr;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
sta->rem_link_stats.tx_packets +=
link_sta->tx_stats.packets[ac];
sta->rem_link_stats.tx_bytes += link_sta->tx_stats.bytes[ac];
}
sta->rem_link_stats.rx_packets += link_sta->rx_stats.packets;
sta->rem_link_stats.rx_bytes += link_sta->rx_stats.bytes;
sta->rem_link_stats.tx_retries += link_sta->status_stats.retry_count;
sta->rem_link_stats.tx_failed += link_sta->status_stats.retry_failed;
sta->rem_link_stats.rx_dropped_misc += link_sta->rx_stats.dropped;
thr = sta_get_expected_throughput(sta);
if (thr != 0 )
sta->rem_link_stats.expected_throughput += thr;
for (tid = 0 ; tid < IEEE80211_NUM_TIDS; tid++) {
sta->rem_link_stats.pertid_stats.rx_msdu +=
link_sta->rx_stats.msdu[tid];
sta->rem_link_stats.pertid_stats.tx_msdu +=
link_sta->tx_stats.msdu[tid];
sta->rem_link_stats.pertid_stats.tx_msdu_retries +=
link_sta->status_stats.msdu_retries[tid];
sta->rem_link_stats.pertid_stats.tx_msdu_failed +=
link_sta->status_stats.msdu_failed[tid];
}
if (sta->sdata->vif.type == NL80211_IFTYPE_STATION) {
link = wiphy_dereference(sta->sdata->local->hw.wiphy,
sta->sdata->link[link_id]);
if (link)
sta->rem_link_stats.beacon_loss_count +=
link->u.mgd.beacon_loss_count;
}
}
static void sta_remove_link(struct sta_info *sta, unsigned int link_id,
bool unhash)
{
struct sta_link_alloc *alloc = NULL;
struct link_sta_info *link_sta;
lockdep_assert_wiphy(sta->local->hw.wiphy);
link_sta = rcu_access_pointer(sta->link[link_id]);
if (WARN_ON(!link_sta))
return ;
if (unhash)
link_sta_info_hash_del(sta->local, link_sta);
if (test_sta_flag(sta, WLAN_STA_INSERTED))
ieee80211_link_sta_debugfs_remove(link_sta);
if (link_sta != &sta->deflink)
alloc = container_of(link_sta, typeof(*alloc), info);
sta->sta.valid_links &= ~BIT(link_id);
/* store removed link info for accumulated stats consistency */
sta_accumulate_removed_link_stats(sta, link_id);
RCU_INIT_POINTER(sta->link[link_id], NULL);
RCU_INIT_POINTER(sta->sta.link[link_id], NULL);
if (alloc) {
sta_info_free_link(&alloc->info);
kfree_rcu(alloc, rcu_head);
}
ieee80211_sta_recalc_aggregates(&sta->sta);
}
/**
* sta_info_free - free STA
*
* @ local : pointer to the global information
* @ sta : STA info to free
*
* This function must undo everything done by sta_info_alloc ( )
* that may happen before sta_info_insert ( ) . It may only be
* called when sta_info_insert ( ) has not been attempted ( and
* if that fails , the station is freed anyway . )
*/
void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
{
int i;
for (i = 0 ; i < ARRAY_SIZE(sta->link); i++) {
struct link_sta_info *link_sta;
link_sta = rcu_access_pointer(sta->link[i]);
if (!link_sta)
continue ;
sta_remove_link(sta, i, false );
}
/*
* If we had used sta_info_pre_move_state ( ) then we might not
* have gone through the state transitions down again , so do
* it here now ( and warn if it ' s inserted ) .
*
* This will clear state such as fast TX / RX that may have been
* allocated during state transitions .
*/
while (sta->sta_state > IEEE80211_STA_NONE) {
int ret;
WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
ret = sta_info_move_state(sta, sta->sta_state - 1 );
if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n" , ret))
break ;
}
if (sta->rate_ctrl)
rate_control_free_sta(sta);
sta_dbg(sta->sdata, "Destroyed STA %pM\n" , sta->sta.addr);
kfree(to_txq_info(sta->sta.txq[0 ]));
kfree(rcu_dereference_raw(sta->sta.rates));
#ifdef CONFIG_MAC80211_MESH
kfree(sta->mesh);
#endif
sta_info_free_link(&sta->deflink);
kfree(sta);
}
static int sta_info_hash_add(struct ieee80211_local *local,
struct sta_info *sta)
{
return rhltable_insert(&local->sta_hash, &sta->hash_node,
sta_rht_params);
}
static void sta_deliver_ps_frames(struct work_struct *wk)
{
struct sta_info *sta;
sta = container_of(wk, struct sta_info, drv_deliver_wk);
if (sta->dead)
return ;
local_bh_disable();
if (!test_sta_flag(sta, WLAN_STA_PS_STA))
ieee80211_sta_ps_deliver_wakeup(sta);
else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
ieee80211_sta_ps_deliver_poll_response(sta);
else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
ieee80211_sta_ps_deliver_uapsd(sta);
local_bh_enable();
}
static int sta_prepare_rate_control(struct ieee80211_local *local,
struct sta_info *sta, gfp_t gfp)
{
if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
return 0 ;
sta->rate_ctrl = local->rate_ctrl;
sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
sta, gfp);
if (!sta->rate_ctrl_priv)
return -ENOMEM;
return 0 ;
}
static int sta_info_alloc_link(struct ieee80211_local *local,
struct link_sta_info *link_info,
gfp_t gfp)
{
struct ieee80211_hw *hw = &local->hw;
int i;
if (ieee80211_hw_check(hw, USES_RSS)) {
link_info->pcpu_rx_stats =
alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
if (!link_info->pcpu_rx_stats)
return -ENOMEM;
}
link_info->rx_stats.last_rx = jiffies;
u64_stats_init(&link_info->rx_stats.syncp);
ewma_signal_init(&link_info->rx_stats_avg.signal);
ewma_avg_signal_init(&link_info->status_stats.avg_ack_signal);
for (i = 0 ; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++)
ewma_signal_init(&link_info->rx_stats_avg.chain_signal[i]);
link_info->rx_omi_bw_rx = IEEE80211_STA_RX_BW_MAX;
link_info->rx_omi_bw_tx = IEEE80211_STA_RX_BW_MAX;
link_info->rx_omi_bw_staging = IEEE80211_STA_RX_BW_MAX;
/*
* Cause ( a ) warning ( s ) if IEEE80211_STA_RX_BW_MAX ! = 320
* or if new values are added to the enum .
*/
switch (link_info->cur_max_bandwidth) {
case IEEE80211_STA_RX_BW_20:
case IEEE80211_STA_RX_BW_40:
case IEEE80211_STA_RX_BW_80:
case IEEE80211_STA_RX_BW_160:
case IEEE80211_STA_RX_BW_MAX:
/* intentionally nothing */
break ;
}
return 0 ;
}
static void sta_info_add_link(struct sta_info *sta,
unsigned int link_id,
struct link_sta_info *link_info,
struct ieee80211_link_sta *link_sta)
{
link_info->sta = sta;
link_info->link_id = link_id;
link_info->pub = link_sta;
link_info->pub->sta = &sta->sta;
link_sta->link_id = link_id;
rcu_assign_pointer(sta->link[link_id], link_info);
rcu_assign_pointer(sta->sta.link[link_id], link_sta);
link_sta->smps_mode = IEEE80211_SMPS_OFF;
link_sta->agg.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
}
static struct sta_info *
__sta_info_alloc(struct ieee80211_sub_if_data *sdata,
const u8 *addr, int link_id, const u8 *link_addr,
gfp_t gfp)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_hw *hw = &local->hw;
struct sta_info *sta;
void *txq_data;
int size;
int i;
sta = kzalloc(sizeof (*sta) + hw->sta_data_size, gfp);
if (!sta)
return NULL;
sta->local = local;
sta->sdata = sdata;
if (sta_info_alloc_link(local, &sta->deflink, gfp))
goto free;
if (link_id >= 0 ) {
sta_info_add_link(sta, link_id, &sta->deflink,
&sta->sta.deflink);
sta->sta.valid_links = BIT(link_id);
} else {
sta_info_add_link(sta, 0 , &sta->deflink, &sta->sta.deflink);
}
sta->sta.cur = &sta->sta.deflink.agg;
spin_lock_init(&sta->lock);
spin_lock_init(&sta->ps_lock);
INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
wiphy_work_init(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
#ifdef CONFIG_MAC80211_MESH
if (ieee80211_vif_is_mesh(&sdata->vif)) {
sta->mesh = kzalloc(sizeof (*sta->mesh), gfp);
if (!sta->mesh)
goto free;
sta->mesh->plink_sta = sta;
spin_lock_init(&sta->mesh->plink_lock);
if (!sdata->u.mesh.user_mpm)
timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
0 );
sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
}
#endif
memcpy(sta->addr, addr, ETH_ALEN);
memcpy(sta->sta.addr, addr, ETH_ALEN);
memcpy(sta->deflink.addr, link_addr, ETH_ALEN);
memcpy(sta->sta.deflink.addr, link_addr, ETH_ALEN);
sta->sta.max_rx_aggregation_subframes =
local->hw.max_rx_aggregation_subframes;
/* TODO link specific alloc and assignments for MLO Link STA */
/* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
* The Tx path starts to use a key as soon as the key slot ptk_idx
* references to is not NULL . To not use the initial Rx - only key
* prematurely for Tx initialize ptk_idx to an impossible PTK keyid
* which always will refer to a NULL key .
*/
BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
sta->ptk_idx = INVALID_PTK_KEYIDX;
ieee80211_init_frag_cache(&sta->frags);
sta->sta_state = IEEE80211_STA_NONE;
if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
sta->amsdu_mesh_control = -1 ;
/* Mark TID as unreserved */
sta->reserved_tid = IEEE80211_TID_UNRESERVED;
sta->last_connected = ktime_get_seconds();
size = sizeof (struct txq_info) +
ALIGN(hw->txq_data_size, sizeof (void *));
txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
if (!txq_data)
goto free;
for (i = 0 ; i < ARRAY_SIZE(sta->sta.txq); i++) {
struct txq_info *txq = txq_data + i * size;
/* might not do anything for the (bufferable) MMPDU TXQ */
ieee80211_txq_init(sdata, sta, txq, i);
}
if (sta_prepare_rate_control(local, sta, gfp))
goto free_txq;
sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
for (i = 0 ; i < IEEE80211_NUM_ACS; i++) {
skb_queue_head_init(&sta->ps_tx_buf[i]);
skb_queue_head_init(&sta->tx_filtered[i]);
sta->airtime[i].deficit = sta->airtime_weight;
atomic_set(&sta->airtime[i].aql_tx_pending, 0 );
sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i];
sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i];
}
for (i = 0 ; i < IEEE80211_NUM_TIDS; i++)
sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
for (i = 0 ; i < NUM_NL80211_BANDS; i++) {
u32 mandatory = 0 ;
int r;
if (!hw->wiphy->bands[i])
continue ;
switch (i) {
case NL80211_BAND_2GHZ:
case NL80211_BAND_LC:
/*
* We use both here , even if we cannot really know for
* sure the station will support both , but the only use
* for this is when we don ' t know anything yet and send
* management frames , and then we ' ll pick the lowest
* possible rate anyway .
* If we don ' t include _ G here , we cannot find a rate
* in P2P , and thus trigger the WARN_ONCE ( ) in rate . c
*/
mandatory = IEEE80211_RATE_MANDATORY_B |
IEEE80211_RATE_MANDATORY_G;
break ;
case NL80211_BAND_5GHZ:
case NL80211_BAND_6GHZ:
mandatory = IEEE80211_RATE_MANDATORY_A;
break ;
case NL80211_BAND_60GHZ:
WARN_ON(1 );
mandatory = 0 ;
break ;
}
for (r = 0 ; r < hw->wiphy->bands[i]->n_bitrates; r++) {
struct ieee80211_rate *rate;
rate = &hw->wiphy->bands[i]->bitrates[r];
if (!(rate->flags & mandatory))
continue ;
sta->sta.deflink.supp_rates[i] |= BIT(r);
}
}
sta_dbg(sdata, "Allocated STA %pM\n" , sta->sta.addr);
return sta;
free_txq:
kfree(to_txq_info(sta->sta.txq[0 ]));
free:
sta_info_free_link(&sta->deflink);
#ifdef CONFIG_MAC80211_MESH
kfree(sta->mesh);
#endif
kfree(sta);
return NULL;
}
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
const u8 *addr, gfp_t gfp)
{
return __sta_info_alloc(sdata, addr, -1 , addr, gfp);
}
struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata,
const u8 *mld_addr,
unsigned int link_id,
const u8 *link_addr,
gfp_t gfp)
{
return __sta_info_alloc(sdata, mld_addr, link_id, link_addr, gfp);
}
static int sta_info_insert_check(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
/*
* Can ' t be a WARN_ON because it can be triggered through a race :
* something inserts a STA ( on one CPU ) without holding the RTNL
* and another CPU turns off the net device .
*/
if (unlikely(!ieee80211_sdata_running(sdata)))
return -ENETDOWN;
if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
!is_valid_ether_addr(sta->sta.addr)))
return -EINVAL;
/* The RCU read lock is required by rhashtable due to
* asynchronous resize / rehash . We also require the mutex
* for correctness .
*/
rcu_read_lock();
if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
rcu_read_unlock();
return -ENOTUNIQ;
}
rcu_read_unlock();
return 0 ;
}
static int sta_info_insert_drv_state(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct sta_info *sta)
{
enum ieee80211_sta_state state;
int err = 0 ;
for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
err = drv_sta_state(local, sdata, sta, state, state + 1 );
if (err)
break ;
}
if (!err) {
/*
* Drivers using legacy sta_add / sta_remove callbacks only
* get uploaded set to true after sta_add is called .
*/
if (!local->ops->sta_add)
sta->uploaded = true ;
return 0 ;
}
if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
sdata_info(sdata,
"failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n" ,
sta->sta.addr, state + 1 , err);
err = 0 ;
}
/* unwind on error */
for (; state > IEEE80211_STA_NOTEXIST; state--)
WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1 ));
return err;
}
static void
ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
bool allow_p2p_go_ps = sdata->vif.p2p;
struct sta_info *sta;
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list) {
if (sdata != sta->sdata ||
!test_sta_flag(sta, WLAN_STA_ASSOC))
continue ;
if (!sta->sta.support_p2p_ps) {
allow_p2p_go_ps = false ;
break ;
}
}
rcu_read_unlock();
if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
ieee80211_link_info_change_notify(sdata, &sdata->deflink,
BSS_CHANGED_P2P_PS);
}
}
static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
{
struct ieee80211_local *local = sta->local;
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct station_info *sinfo = NULL;
int err = 0 ;
lockdep_assert_wiphy(local->hw.wiphy);
/* check if STA exists already */
if (sta_info_get_bss(sdata, sta->sta.addr)) {
err = -EEXIST;
goto out_cleanup;
}
sinfo = kzalloc(sizeof (struct station_info), GFP_KERNEL);
if (!sinfo) {
err = -ENOMEM;
goto out_cleanup;
}
local->num_sta++;
local->sta_generation++;
smp_mb();
/* simplify things and don't accept BA sessions yet */
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
/* make the station visible */
err = sta_info_hash_add(local, sta);
if (err)
goto out_drop_sta;
if (sta->sta.valid_links) {
err = link_sta_info_hash_add(local, &sta->deflink);
if (err) {
sta_info_hash_del(local, sta);
goto out_drop_sta;
}
}
list_add_tail_rcu(&sta->list, &local->sta_list);
/* update channel context before notifying the driver about state
* change , this enables driver using the updated channel context right away .
*/
if (sta->sta_state >= IEEE80211_STA_ASSOC) {
ieee80211_recalc_min_chandef(sta->sdata, -1 );
if (!sta->sta.support_p2p_ps)
ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
}
/* notify driver */
err = sta_info_insert_drv_state(local, sdata, sta);
if (err)
goto out_remove;
set_sta_flag(sta, WLAN_STA_INSERTED);
/* accept BA sessions now */
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_debugfs_add(sta);
rate_control_add_sta_debugfs(sta);
if (sta->sta.valid_links) {
int i;
for (i = 0 ; i < ARRAY_SIZE(sta->link); i++) {
struct link_sta_info *link_sta;
link_sta = rcu_dereference_protected(sta->link[i],
lockdep_is_held(&local->hw.wiphy->mtx));
if (!link_sta)
continue ;
ieee80211_link_sta_debugfs_add(link_sta);
if (sdata->vif.active_links & BIT(i))
ieee80211_link_sta_debugfs_drv_add(link_sta);
}
} else {
ieee80211_link_sta_debugfs_add(&sta->deflink);
ieee80211_link_sta_debugfs_drv_add(&sta->deflink);
}
sinfo->generation = local->sta_generation;
cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
kfree(sinfo);
sta_dbg(sdata, "Inserted STA %pM\n" , sta->sta.addr);
/* move reference to rcu-protected */
rcu_read_lock();
if (ieee80211_vif_is_mesh(&sdata->vif))
mesh_accept_plinks_update(sdata);
ieee80211_check_fast_xmit(sta);
return 0 ;
out_remove:
if (sta->sta.valid_links)
link_sta_info_hash_del(local, &sta->deflink);
sta_info_hash_del(local, sta);
list_del_rcu(&sta->list);
out_drop_sta:
local->num_sta--;
synchronize_net();
out_cleanup:
cleanup_single_sta(sta);
kfree(sinfo);
rcu_read_lock();
return err;
}
int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
{
struct ieee80211_local *local = sta->local;
int err;
might_sleep();
lockdep_assert_wiphy(local->hw.wiphy);
err = sta_info_insert_check(sta);
if (err) {
sta_info_free(local, sta);
rcu_read_lock();
return err;
}
return sta_info_insert_finish(sta);
}
int sta_info_insert(struct sta_info *sta)
{
int err = sta_info_insert_rcu(sta);
rcu_read_unlock();
return err;
}
static inline void __bss_tim_set(u8 *tim, u16 id)
{
/*
* This format has been mandated by the IEEE specifications ,
* so this line may not be changed to use the _ _ set_bit ( ) format .
*/
tim[id / 8 ] |= (1 << (id % 8 ));
}
static inline void __bss_tim_clear(u8 *tim, u16 id)
{
/*
* This format has been mandated by the IEEE specifications ,
* so this line may not be changed to use the _ _ clear_bit ( ) format .
*/
tim[id / 8 ] &= ~(1 << (id % 8 ));
}
static inline bool __bss_tim_get(u8 *tim, u16 id)
{
/*
* This format has been mandated by the IEEE specifications ,
* so this line may not be changed to use the test_bit ( ) format .
*/
return tim[id / 8 ] & (1 << (id % 8 ));
}
static unsigned long ieee80211_tids_for_ac(int ac)
{
/* If we ever support TIDs > 7, this obviously needs to be adjusted */
switch (ac) {
case IEEE80211_AC_VO:
return BIT(6 ) | BIT(7 );
case IEEE80211_AC_VI:
return BIT(4 ) | BIT(5 );
case IEEE80211_AC_BE:
return BIT(0 ) | BIT(3 );
case IEEE80211_AC_BK:
return BIT(1 ) | BIT(2 );
default :
WARN_ON(1 );
return 0 ;
}
}
static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
{
struct ieee80211_local *local = sta->local;
struct ps_data *ps;
bool indicate_tim = false ;
u8 ignore_for_tim = sta->sta.uapsd_queues;
int ac;
u16 id = sta->sta.aid;
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
if (WARN_ON_ONCE(!sta->sdata->bss))
return ;
ps = &sta->sdata->bss->ps;
#ifdef CONFIG_MAC80211_MESH
} else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
ps = &sta->sdata->u.mesh.ps;
#endif
} else {
return ;
}
/* No need to do anything if the driver does all */
if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
return ;
if (sta->dead)
goto done;
/*
* If all ACs are delivery - enabled then we should build
* the TIM bit for all ACs anyway ; if only some are then
* we ignore those and build the TIM bit using only the
* non - enabled ones .
*/
if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1 )
ignore_for_tim = 0 ;
if (ignore_pending)
ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1 ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
unsigned long tids;
if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
continue ;
indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
!skb_queue_empty(&sta->ps_tx_buf[ac]);
if (indicate_tim)
break ;
tids = ieee80211_tids_for_ac(ac);
indicate_tim |=
sta->driver_buffered_tids & tids;
indicate_tim |=
sta->txq_buffered_tids & tids;
}
done:
spin_lock_bh(&local->tim_lock);
if (indicate_tim == __bss_tim_get(ps->tim, id))
goto out_unlock;
if (indicate_tim)
__bss_tim_set(ps->tim, id);
else
__bss_tim_clear(ps->tim, id);
if (local->ops->set_tim && !WARN_ON(sta->dead)) {
local->tim_in_locked_section = true ;
drv_set_tim(local, &sta->sta, indicate_tim);
local->tim_in_locked_section = false ;
}
out_unlock:
spin_unlock_bh(&local->tim_lock);
}
void sta_info_recalc_tim(struct sta_info *sta)
{
__sta_info_recalc_tim(sta, false );
}
static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
{
struct ieee80211_tx_info *info;
int timeout;
if (!skb)
return false ;
info = IEEE80211_SKB_CB(skb);
/* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
timeout = (sta->listen_interval *
sta->sdata->vif.bss_conf.beacon_int *
32 / 15625 ) * HZ;
if (timeout < STA_TX_BUFFER_EXPIRE)
timeout = STA_TX_BUFFER_EXPIRE;
return time_after(jiffies, info->control.jiffies + timeout);
}
static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
struct sta_info *sta, int ac)
{
unsigned long flags;
struct sk_buff *skb;
/*
* First check for frames that should expire on the filtered
* queue . Frames here were rejected by the driver and are on
* a separate queue to avoid reordering with normal PS - buffered
* frames . They also aren ' t accounted for right now in the
* total_ps_buffered counter .
*/
for (;;) {
spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
skb = skb_peek(&sta->tx_filtered[ac]);
if (sta_info_buffer_expired(sta, skb))
skb = __skb_dequeue(&sta->tx_filtered[ac]);
else
skb = NULL;
spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
/*
* Frames are queued in order , so if this one
* hasn ' t expired yet we can stop testing . If
* we actually reached the end of the queue we
* also need to stop , of course .
*/
if (!skb)
break ;
ieee80211_free_txskb(&local->hw, skb);
}
/*
* Now also check the normal PS - buffered queue , this will
* only find something if the filtered queue was emptied
* since the filtered frames are all before the normal PS
* buffered frames .
*/
for (;;) {
spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
skb = skb_peek(&sta->ps_tx_buf[ac]);
if (sta_info_buffer_expired(sta, skb))
skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
else
skb = NULL;
spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
/*
* frames are queued in order , so if this one
* hasn ' t expired yet ( or we reached the end of
* the queue ) we can stop testing
*/
if (!skb)
break ;
local->total_ps_buffered--;
ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n" ,
sta->sta.addr);
ieee80211_free_txskb(&local->hw, skb);
}
/*
* Finally , recalculate the TIM bit for this station - - it might
* now be clear because the station was too slow to retrieve its
* frames .
*/
sta_info_recalc_tim(sta);
/*
* Return whether there are any frames still buffered , this is
* used to check whether the cleanup timer still needs to run ,
* if there are no frames we don ' t need to rearm the timer .
*/
return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
skb_queue_empty(&sta->tx_filtered[ac]));
}
static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
struct sta_info *sta)
{
bool have_buffered = false ;
int ac;
/* This is only necessary for stations on BSS/MBSS interfaces */
if (!sta->sdata->bss &&
!ieee80211_vif_is_mesh(&sta->sdata->vif))
return false ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
have_buffered |=
sta_info_cleanup_expire_buffered_ac(local, sta, ac);
return have_buffered;
}
static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
{
struct ieee80211_local *local;
struct ieee80211_sub_if_data *sdata;
int ret, i;
might_sleep();
if (!sta)
return -ENOENT;
local = sta->local;
sdata = sta->sdata;
lockdep_assert_wiphy(local->hw.wiphy);
/*
* Before removing the station from the driver and
* rate control , it might still start new aggregation
* sessions - - block that to make sure the tear - down
* will be sufficient .
*/
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
/*
* Before removing the station from the driver there might be pending
* rx frames on RSS queues sent prior to the disassociation - wait for
* all such frames to be processed .
*/
drv_sync_rx_queues(local, sta);
for (i = 0 ; i < ARRAY_SIZE(sta->link); i++) {
struct link_sta_info *link_sta;
if (!(sta->sta.valid_links & BIT(i)))
continue ;
link_sta = rcu_dereference_protected(sta->link[i],
lockdep_is_held(&local->hw.wiphy->mtx));
link_sta_info_hash_del(local, link_sta);
}
ret = sta_info_hash_del(local, sta);
if (WARN_ON(ret))
return ret;
/*
* for TDLS peers , make sure to return to the base channel before
* removal .
*/
if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
}
list_del_rcu(&sta->list);
sta->removed = true ;
if (sta->uploaded)
drv_sta_pre_rcu_remove(local, sta->sdata, sta);
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
rcu_access_pointer(sdata->u.vlan.sta) == sta)
RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
return 0 ;
}
static int _sta_info_move_state(struct sta_info *sta,
enum ieee80211_sta_state new_state,
bool recalc)
{
struct ieee80211_local *local = sta->local;
might_sleep();
if (sta->sta_state == new_state)
return 0 ;
/* check allowed transitions first */
switch (new_state) {
case IEEE80211_STA_NONE:
if (sta->sta_state != IEEE80211_STA_AUTH)
return -EINVAL;
break ;
case IEEE80211_STA_AUTH:
if (sta->sta_state != IEEE80211_STA_NONE &&
sta->sta_state != IEEE80211_STA_ASSOC)
return -EINVAL;
break ;
case IEEE80211_STA_ASSOC:
if (sta->sta_state != IEEE80211_STA_AUTH &&
sta->sta_state != IEEE80211_STA_AUTHORIZED)
return -EINVAL;
break ;
case IEEE80211_STA_AUTHORIZED:
if (sta->sta_state != IEEE80211_STA_ASSOC)
return -EINVAL;
break ;
default :
WARN(1 , "invalid state %d" , new_state);
return -EINVAL;
}
sta_dbg(sta->sdata, "moving STA %pM to state %d\n" ,
sta->sta.addr, new_state);
/* notify the driver before the actual changes so it can
* fail the transition if the state is increasing .
* The driver is required not to fail when the transition
* is decreasing the state , so first , do all the preparation
* work and only then , notify the driver .
*/
if (new_state > sta->sta_state &&
test_sta_flag(sta, WLAN_STA_INSERTED)) {
int err = drv_sta_state(sta->local, sta->sdata, sta,
sta->sta_state, new_state);
if (err)
return err;
}
/* reflect the change in all state variables */
switch (new_state) {
case IEEE80211_STA_NONE:
if (sta->sta_state == IEEE80211_STA_AUTH)
clear_bit(WLAN_STA_AUTH, &sta->_flags);
break ;
case IEEE80211_STA_AUTH:
if (sta->sta_state == IEEE80211_STA_NONE) {
set_bit(WLAN_STA_AUTH, &sta->_flags);
} else if (sta->sta_state == IEEE80211_STA_ASSOC) {
clear_bit(WLAN_STA_ASSOC, &sta->_flags);
if (recalc) {
ieee80211_recalc_min_chandef(sta->sdata, -1 );
if (!sta->sta.support_p2p_ps)
ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
}
}
break ;
case IEEE80211_STA_ASSOC:
if (sta->sta_state == IEEE80211_STA_AUTH) {
set_bit(WLAN_STA_ASSOC, &sta->_flags);
sta->assoc_at = ktime_get_boottime_ns();
if (recalc) {
ieee80211_recalc_min_chandef(sta->sdata, -1 );
if (!sta->sta.support_p2p_ps)
ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
}
} else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
ieee80211_vif_dec_num_mcast(sta->sdata);
clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
/*
* If we have encryption offload , flush ( station ) queues
* ( after ensuring concurrent TX completed ) so we won ' t
* transmit anything later unencrypted if / when keys are
* also removed , which might otherwise happen depending
* on how the hardware offload works .
*/
if (local->ops->set_key) {
synchronize_net();
if (local->ops->flush_sta)
drv_flush_sta(local, sta->sdata, sta);
else
ieee80211_flush_queues(local,
sta->sdata,
false );
}
ieee80211_clear_fast_xmit(sta);
ieee80211_clear_fast_rx(sta);
}
break ;
case IEEE80211_STA_AUTHORIZED:
if (sta->sta_state == IEEE80211_STA_ASSOC) {
ieee80211_vif_inc_num_mcast(sta->sdata);
set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
ieee80211_check_fast_xmit(sta);
ieee80211_check_fast_rx(sta);
}
if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
sta->sdata->vif.type == NL80211_IFTYPE_AP)
cfg80211_send_layer2_update(sta->sdata->dev,
sta->sta.addr);
break ;
default :
break ;
}
if (new_state < sta->sta_state &&
test_sta_flag(sta, WLAN_STA_INSERTED)) {
int err = drv_sta_state(sta->local, sta->sdata, sta,
sta->sta_state, new_state);
WARN_ONCE(err,
"Driver is not allowed to fail if the sta_state is transitioning down the list: %d\n" ,
err);
}
sta->sta_state = new_state;
return 0 ;
}
int sta_info_move_state(struct sta_info *sta,
enum ieee80211_sta_state new_state)
{
return _sta_info_move_state(sta, new_state, true );
}
static void __sta_info_destroy_part2(struct sta_info *sta, bool recalc)
{
struct ieee80211_local *local = sta->local;
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct station_info *sinfo;
int ret;
/*
* NOTE : This assumes at least synchronize_net ( ) was done
* after _ part1 and before _ part2 !
*/
/*
* There ' s a potential race in _ part1 where we set WLAN_STA_BLOCK_BA
* but someone might have just gotten past a check , and not yet into
* queuing the work / creating the data / etc .
*
* Do another round of destruction so that the worker is certainly
* canceled before we later free the station .
*
* Since this is after synchronize_rcu ( ) / synchronize_net ( ) we ' re now
* certain that nobody can actually hold a reference to the STA and
* be calling e . g . ieee80211_start_tx_ba_session ( ) .
*/
ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
might_sleep();
lockdep_assert_wiphy(local->hw.wiphy);
if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
ret = _sta_info_move_state(sta, IEEE80211_STA_ASSOC, recalc);
WARN_ON_ONCE(ret);
}
/* now keys can no longer be reached */
ieee80211_free_sta_keys(local, sta);
/* disable TIM bit - last chance to tell driver */
__sta_info_recalc_tim(sta, true );
sta->dead = true ;
local->num_sta--;
local->sta_generation++;
while (sta->sta_state > IEEE80211_STA_NONE) {
ret = _sta_info_move_state(sta, sta->sta_state - 1 , recalc);
if (ret) {
WARN_ON_ONCE(1 );
break ;
}
}
if (sta->uploaded) {
ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
IEEE80211_STA_NOTEXIST);
WARN_ON_ONCE(ret != 0 );
}
sta_dbg(sdata, "Removed STA %pM\n" , sta->sta.addr);
sinfo = kzalloc(sizeof (*sinfo), GFP_KERNEL);
if (sinfo)
sta_set_sinfo(sta, sinfo, true );
cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
kfree(sinfo);
ieee80211_sta_debugfs_remove(sta);
ieee80211_destroy_frag_cache(&sta->frags);
cleanup_single_sta(sta);
}
int __must_check __sta_info_destroy(struct sta_info *sta)
{
int err = __sta_info_destroy_part1(sta);
if (err)
return err;
synchronize_net();
__sta_info_destroy_part2(sta, true );
return 0 ;
}
int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
{
struct sta_info *sta;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
sta = sta_info_get(sdata, addr);
return __sta_info_destroy(sta);
}
int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
const u8 *addr)
{
struct sta_info *sta;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
sta = sta_info_get_bss(sdata, addr);
return __sta_info_destroy(sta);
}
static void sta_info_cleanup(struct timer_list *t)
{
struct ieee80211_local *local = timer_container_of(local, t,
sta_cleanup);
struct sta_info *sta;
bool timer_needed = false ;
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list)
if (sta_info_cleanup_expire_buffered(local, sta))
timer_needed = true ;
rcu_read_unlock();
if (local->quiescing)
return ;
if (!timer_needed)
return ;
mod_timer(&local->sta_cleanup,
round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
}
int sta_info_init(struct ieee80211_local *local)
{
int err;
err = rhltable_init(&local->sta_hash, &sta_rht_params);
if (err)
return err;
err = rhltable_init(&local->link_sta_hash, &link_sta_rht_params);
if (err) {
rhltable_destroy(&local->sta_hash);
return err;
}
spin_lock_init(&local->tim_lock);
INIT_LIST_HEAD(&local->sta_list);
timer_setup(&local->sta_cleanup, sta_info_cleanup, 0 );
return 0 ;
}
void sta_info_stop(struct ieee80211_local *local)
{
timer_delete_sync(&local->sta_cleanup);
rhltable_destroy(&local->sta_hash);
rhltable_destroy(&local->link_sta_hash);
}
int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans,
int link_id, struct sta_info *do_not_flush_sta)
{
struct ieee80211_local *local = sdata->local;
struct sta_info *sta, *tmp;
LIST_HEAD(free_list);
int ret = 0 ;
might_sleep();
lockdep_assert_wiphy(local->hw.wiphy);
WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
WARN_ON(vlans && !sdata->bss);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
if (sdata != sta->sdata &&
(!vlans || sdata->bss != sta->sdata->bss))
continue ;
if (sta == do_not_flush_sta)
continue ;
if (link_id >= 0 && sta->sta.valid_links &&
!(sta->sta.valid_links & BIT(link_id)))
continue ;
if (!WARN_ON(__sta_info_destroy_part1(sta)))
list_add(&sta->free_list, &free_list);
ret++;
}
if (!list_empty(&free_list)) {
bool support_p2p_ps = true ;
synchronize_net();
list_for_each_entry_safe(sta, tmp, &free_list, free_list) {
if (!sta->sta.support_p2p_ps)
support_p2p_ps = false ;
__sta_info_destroy_part2(sta, false );
}
ieee80211_recalc_min_chandef(sdata, -1 );
if (!support_p2p_ps)
ieee80211_recalc_p2p_go_ps_allowed(sdata);
}
return ret;
}
void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
unsigned long exp_time)
{
struct ieee80211_local *local = sdata->local;
struct sta_info *sta, *tmp;
lockdep_assert_wiphy(local->hw.wiphy);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
unsigned long last_active = ieee80211_sta_last_active(sta, -1 );
if (sdata != sta->sdata)
continue ;
if (time_is_before_jiffies(last_active + exp_time)) {
sta_dbg(sta->sdata, "expiring inactive STA %pM\n" ,
sta->sta.addr);
if (ieee80211_vif_is_mesh(&sdata->vif) &&
test_sta_flag(sta, WLAN_STA_PS_STA))
atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
WARN_ON(__sta_info_destroy(sta));
}
}
}
struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
const u8 *addr,
const u8 *localaddr)
{
struct ieee80211_local *local = hw_to_local(hw);
struct rhlist_head *tmp;
struct sta_info *sta;
/*
* Just return a random station if localaddr is NULL
* . . . first in list .
*/
for_each_sta_info(local, addr, sta, tmp) {
if (localaddr &&
!ether_addr_equal(sta->sdata->vif.addr, localaddr))
continue ;
if (!sta->uploaded)
return NULL;
return &sta->sta;
}
return NULL;
}
EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
const u8 *addr)
{
struct sta_info *sta;
if (!vif)
return NULL;
sta = sta_info_get_bss(vif_to_sdata(vif), addr);
if (!sta)
return NULL;
if (!sta->uploaded)
return NULL;
return &sta->sta;
}
EXPORT_SYMBOL(ieee80211_find_sta);
/* powersave support code */
void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
struct sk_buff_head pending;
int filtered = 0 , buffered = 0 , ac, i;
unsigned long flags;
struct ps_data *ps;
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
u.ap);
if (sdata->vif.type == NL80211_IFTYPE_AP)
ps = &sdata->bss->ps;
else if (ieee80211_vif_is_mesh(&sdata->vif))
ps = &sdata->u.mesh.ps;
else
return ;
clear_sta_flag(sta, WLAN_STA_SP);
BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1 );
sta->driver_buffered_tids = 0 ;
sta->txq_buffered_tids = 0 ;
if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
for (i = 0 ; i < ARRAY_SIZE(sta->sta.txq); i++) {
if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
continue ;
schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
}
skb_queue_head_init(&pending);
/* sync with ieee80211_tx_h_unicast_ps_buf */
spin_lock_bh(&sta->ps_lock);
/* Send all buffered frames to the station */
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
int count = skb_queue_len(&pending), tmp;
spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
tmp = skb_queue_len(&pending);
filtered += tmp - count;
count = tmp;
spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
tmp = skb_queue_len(&pending);
buffered += tmp - count;
}
ieee80211_add_pending_skbs(local, &pending);
/* now we're no longer in the deliver code */
clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
/* The station might have polled and then woken up before we responded,
* so clear these flags now to avoid them sticking around .
*/
clear_sta_flag(sta, WLAN_STA_PSPOLL);
clear_sta_flag(sta, WLAN_STA_UAPSD);
spin_unlock_bh(&sta->ps_lock);
atomic_dec(&ps->num_sta_ps);
local->total_ps_buffered -= buffered;
sta_info_recalc_tim(sta);
ps_dbg(sdata,
"STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n" ,
sta->sta.addr, sta->sta.aid, filtered, buffered);
ieee80211_check_fast_xmit(sta);
}
static void ieee80211_send_null_response(struct sta_info *sta, int tid,
enum ieee80211_frame_release_type reason,
bool call_driver, bool more_data)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
struct ieee80211_qos_hdr *nullfunc;
struct sk_buff *skb;
int size = sizeof (*nullfunc);
__le16 fc;
bool qos = sta->sta.wme;
struct ieee80211_tx_info *info;
struct ieee80211_chanctx_conf *chanctx_conf;
if (qos) {
fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
IEEE80211_STYPE_QOS_NULLFUNC |
IEEE80211_FCTL_FROMDS);
} else {
size -= 2 ;
fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
IEEE80211_STYPE_NULLFUNC |
IEEE80211_FCTL_FROMDS);
}
skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
if (!skb)
return ;
skb_reserve(skb, local->hw.extra_tx_headroom);
nullfunc = skb_put(skb, size);
nullfunc->frame_control = fc;
nullfunc->duration_id = 0 ;
memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
nullfunc->seq_ctrl = 0 ;
skb->priority = tid;
skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
if (qos) {
nullfunc->qos_ctrl = cpu_to_le16(tid);
if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
nullfunc->qos_ctrl |=
cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
if (more_data)
nullfunc->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
}
}
info = IEEE80211_SKB_CB(skb);
/*
* Tell TX path to send this frame even though the
* STA may still remain is PS mode after this frame
* exchange . Also set EOSP to indicate this packet
* ends the poll / service period .
*/
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
IEEE80211_TX_STATUS_EOSP |
IEEE80211_TX_CTL_REQ_TX_STATUS;
info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
if (call_driver)
drv_allow_buffered_frames(local, sta, BIT(tid), 1 ,
reason, false );
skb->dev = sdata->dev;
rcu_read_lock();
chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
if (WARN_ON(!chanctx_conf)) {
rcu_read_unlock();
kfree_skb(skb);
return ;
}
info->band = chanctx_conf->def.chan->band;
ieee80211_xmit(sdata, sta, skb);
rcu_read_unlock();
}
static int find_highest_prio_tid(unsigned long tids)
{
/* lower 3 TIDs aren't ordered perfectly */
if (tids & 0 xF8)
return fls(tids) - 1 ;
/* TID 0 is BE just like TID 3 */
if (tids & BIT(0 ))
return 0 ;
return fls(tids) - 1 ;
}
/* Indicates if the MORE_DATA bit should be set in the last
* frame obtained by ieee80211_sta_ps_get_frames .
* Note that driver_release_tids is relevant only if
* reason = IEEE80211_FRAME_RELEASE_PSPOLL
*/
static bool
ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
enum ieee80211_frame_release_type reason,
unsigned long driver_release_tids)
{
int ac;
/* If the driver has data on more than one TID then
* certainly there ' s more data if we release just a
* single frame now ( from a single TID ) . This will
* only happen for PS - Poll .
*/
if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
hweight16(driver_release_tids) > 1 )
return true ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
continue ;
if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
!skb_queue_empty(&sta->ps_tx_buf[ac]))
return true ;
}
return false ;
}
static void
ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
enum ieee80211_frame_release_type reason,
struct sk_buff_head *frames,
unsigned long *driver_release_tids)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
int ac;
/* Get response frame(s) and more data bit for the last one. */
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++) {
unsigned long tids;
if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
continue ;
tids = ieee80211_tids_for_ac(ac);
/* if we already have frames from software, then we can't also
* release from hardware queues
*/
if (skb_queue_empty(frames)) {
*driver_release_tids |=
sta->driver_buffered_tids & tids;
*driver_release_tids |= sta->txq_buffered_tids & tids;
}
if (!*driver_release_tids) {
struct sk_buff *skb;
while (n_frames > 0 ) {
skb = skb_dequeue(&sta->tx_filtered[ac]);
if (!skb) {
skb = skb_dequeue(
&sta->ps_tx_buf[ac]);
if (skb)
local->total_ps_buffered--;
}
if (!skb)
break ;
n_frames--;
__skb_queue_tail(frames, skb);
}
}
/* If we have more frames buffered on this AC, then abort the
* loop since we can ' t send more data from other ACs before
* the buffered frames from this .
*/
if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
!skb_queue_empty(&sta->ps_tx_buf[ac]))
break ;
}
}
static void
ieee80211_sta_ps_deliver_response(struct sta_info *sta,
int n_frames, u8 ignored_acs,
enum ieee80211_frame_release_type reason)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
unsigned long driver_release_tids = 0 ;
struct sk_buff_head frames;
bool more_data;
/* Service or PS-Poll period starts */
set_sta_flag(sta, WLAN_STA_SP);
__skb_queue_head_init(&frames);
ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
&frames, &driver_release_tids);
more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
driver_release_tids =
BIT(find_highest_prio_tid(driver_release_tids));
if (skb_queue_empty(&frames) && !driver_release_tids) {
int tid, ac;
/*
* For PS - Poll , this can only happen due to a race condition
* when we set the TIM bit and the station notices it , but
* before it can poll for the frame we expire it .
*
* For uAPSD , this is said in the standard ( 11 . 2 . 1 . 5 h ) :
* At each unscheduled SP for a non - AP STA , the AP shall
* attempt to transmit at least one MSDU or MMPDU , but no
* more than the value specified in the Max SP Length field
* in the QoS Capability element from delivery - enabled ACs ,
* that are destined for the non - AP STA .
*
* Since we have no other MSDU / MMPDU , transmit a QoS null frame .
*/
/* This will evaluate to 1, 3, 5 or 7. */
for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
break ;
tid = 7 - 2 * ac;
ieee80211_send_null_response(sta, tid, reason, true , false );
} else if (!driver_release_tids) {
struct sk_buff_head pending;
struct sk_buff *skb;
int num = 0 ;
u16 tids = 0 ;
bool need_null = false ;
skb_queue_head_init(&pending);
while ((skb = __skb_dequeue(&frames))) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr *hdr = (void *) skb->data;
u8 *qoshdr = NULL;
num++;
/*
* Tell TX path to send this frame even though the
* STA may still remain is PS mode after this frame
* exchange .
*/
info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
/*
* Use MoreData flag to indicate whether there are
* more buffered frames for this STA
*/
if (more_data || !skb_queue_empty(&frames))
hdr->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
else
hdr->frame_control &=
cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
if (ieee80211_is_data_qos(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control))
qoshdr = ieee80211_get_qos_ctl(hdr);
tids |= BIT(skb->priority);
__skb_queue_tail(&pending, skb);
/* end service period after last frame or add one */
if (!skb_queue_empty(&frames))
continue ;
if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
/* for PS-Poll, there's only one frame */
info->flags |= IEEE80211_TX_STATUS_EOSP |
IEEE80211_TX_CTL_REQ_TX_STATUS;
break ;
}
/* For uAPSD, things are a bit more complicated. If the
* last frame has a QoS header ( i . e . is a QoS - data or
* QoS - nulldata frame ) then just set the EOSP bit there
* and be done .
* If the frame doesn ' t have a QoS header ( which means
* it should be a bufferable MMPDU ) then we can ' t set
* the EOSP bit in the QoS header ; add a QoS - nulldata
* frame to the list to send it after the MMPDU .
*
* Note that this code is only in the mac80211 - release
* code path , we assume that the driver will not buffer
* anything but QoS - data frames , or if it does , will
* create the QoS - nulldata frame by itself if needed .
*
* Cf . 802 . 11 - 2012 10 . 2 . 1 . 10 ( c ) .
*/
if (qoshdr) {
*qoshdr |= IEEE80211_QOS_CTL_EOSP;
info->flags |= IEEE80211_TX_STATUS_EOSP |
IEEE80211_TX_CTL_REQ_TX_STATUS;
} else {
/* The standard isn't completely clear on this
* as it says the more - data bit should be set
* if there are more BUs . The QoS - Null frame
* we ' re about to send isn ' t buffered yet , we
* only create it below , but let ' s pretend it
* was buffered just in case some clients only
* expect more - data = 0 when eosp = 1 .
*/
hdr->frame_control |=
cpu_to_le16(IEEE80211_FCTL_MOREDATA);
need_null = true ;
num++;
}
break ;
}
drv_allow_buffered_frames(local, sta, tids, num,
reason, more_data);
ieee80211_add_pending_skbs(local, &pending);
if (need_null)
ieee80211_send_null_response(
sta, find_highest_prio_tid(tids),
reason, false , false );
sta_info_recalc_tim(sta);
} else {
int tid;
/*
* We need to release a frame that is buffered somewhere in the
* driver . . . it ' ll have to handle that .
* Note that the driver also has to check the number of frames
* on the TIDs we ' re releasing from - if there are more than
* n_frames it has to set the more - data bit ( if we didn ' t ask
* it to set it anyway due to other buffered frames ) ; if there
* are fewer than n_frames it has to make sure to adjust that
* to allow the service period to end properly .
*/
drv_release_buffered_frames(local, sta, driver_release_tids,
n_frames, reason, more_data);
/*
* Note that we don ' t recalculate the TIM bit here as it would
* most likely have no effect at all unless the driver told us
* that the TID ( s ) became empty before returning here from the
* release function .
* Either way , however , when the driver tells us that the TID ( s )
* became empty or we find that a txq became empty , we ' ll do the
* TIM recalculation .
*/
for (tid = 0 ; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
if (!sta->sta.txq[tid] ||
!(driver_release_tids & BIT(tid)) ||
txq_has_queue(sta->sta.txq[tid]))
continue ;
sta_info_recalc_tim(sta);
break ;
}
}
}
void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
{
u8 ignore_for_response = sta->sta.uapsd_queues;
/*
* If all ACs are delivery - enabled then we should reply
* from any of them , if only some are enabled we reply
* only from the non - enabled ones .
*/
if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1 )
ignore_for_response = 0 ;
ieee80211_sta_ps_deliver_response(sta, 1 , ignore_for_response,
IEEE80211_FRAME_RELEASE_PSPOLL);
}
void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
{
int n_frames = sta->sta.max_sp;
u8 delivery_enabled = sta->sta.uapsd_queues;
/*
* If we ever grow support for TSPEC this might happen if
* the TSPEC update from hostapd comes in between a trigger
* frame setting WLAN_STA_UAPSD in the RX path and this
* actually getting called .
*/
if (!delivery_enabled)
return ;
switch (sta->sta.max_sp) {
case 1 :
n_frames = 2 ;
break ;
case 2 :
n_frames = 4 ;
break ;
case 3 :
n_frames = 6 ;
break ;
case 0 :
/* XXX: what is a good value? */
n_frames = 128 ;
break ;
}
ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
IEEE80211_FRAME_RELEASE_UAPSD);
}
void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
struct ieee80211_sta *pubsta, bool block)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
trace_api_sta_block_awake(sta->local, pubsta, block);
if (block) {
set_sta_flag(sta, WLAN_STA_PS_DRIVER);
ieee80211_clear_fast_xmit(sta);
return ;
}
if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
return ;
if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
set_sta_flag(sta, WLAN_STA_PS_DELIVER);
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
ieee80211_queue_work(hw, &sta->drv_deliver_wk);
} else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
test_sta_flag(sta, WLAN_STA_UAPSD)) {
/* must be asleep in this case */
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
ieee80211_queue_work(hw, &sta->drv_deliver_wk);
} else {
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
ieee80211_check_fast_xmit(sta);
}
}
EXPORT_SYMBOL(ieee80211_sta_block_awake);
void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
struct ieee80211_local *local = sta->local;
trace_api_eosp(local, pubsta);
clear_sta_flag(sta, WLAN_STA_SP);
}
EXPORT_SYMBOL(ieee80211_sta_eosp);
void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
enum ieee80211_frame_release_type reason;
bool more_data;
trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
reason = IEEE80211_FRAME_RELEASE_UAPSD;
more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
reason, 0 );
ieee80211_send_null_response(sta, tid, reason, false , more_data);
}
EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
u8 tid, bool buffered)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
return ;
trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
if (buffered)
set_bit(tid, &sta->driver_buffered_tids);
else
clear_bit(tid, &sta->driver_buffered_tids);
sta_info_recalc_tim(sta);
}
EXPORT_SYMBOL(ieee80211_sta_set_buffered);
void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
u32 tx_airtime, u32 rx_airtime)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
struct ieee80211_local *local = sta->sdata->local;
u8 ac = ieee80211_ac_from_tid(tid);
u32 airtime = 0 ;
if (sta->local->airtime_flags & AIRTIME_USE_TX)
airtime += tx_airtime;
if (sta->local->airtime_flags & AIRTIME_USE_RX)
airtime += rx_airtime;
spin_lock_bh(&local->active_txq_lock[ac]);
sta->airtime[ac].tx_airtime += tx_airtime;
sta->airtime[ac].rx_airtime += rx_airtime;
if (ieee80211_sta_keep_active(sta, ac))
sta->airtime[ac].deficit -= airtime;
spin_unlock_bh(&local->active_txq_lock[ac]);
}
EXPORT_SYMBOL(ieee80211_sta_register_airtime);
void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links)
{
bool first = true ;
int link_id;
if (!sta->sta.valid_links || !sta->sta.mlo) {
sta->sta.cur = &sta->sta.deflink.agg;
return ;
}
rcu_read_lock();
for (link_id = 0 ; link_id < ARRAY_SIZE((sta)->link); link_id++) {
struct ieee80211_link_sta *link_sta;
int i;
if (!(active_links & BIT(link_id)))
continue ;
link_sta = rcu_dereference(sta->sta.link[link_id]);
if (!link_sta)
continue ;
if (first) {
sta->cur = sta->sta.deflink.agg;
first = false ;
continue ;
}
sta->cur.max_amsdu_len =
min(sta->cur.max_amsdu_len,
link_sta->agg.max_amsdu_len);
sta->cur.max_rc_amsdu_len =
min(sta->cur.max_rc_amsdu_len,
link_sta->agg.max_rc_amsdu_len);
for (i = 0 ; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++)
sta->cur.max_tid_amsdu_len[i] =
min(sta->cur.max_tid_amsdu_len[i],
link_sta->agg.max_tid_amsdu_len[i]);
}
rcu_read_unlock();
sta->sta.cur = &sta->cur;
}
void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
__ieee80211_sta_recalc_aggregates(sta, sta->sdata->vif.active_links);
}
EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates);
void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
struct sta_info *sta, u8 ac,
u16 tx_airtime, bool tx_completed)
{
int tx_pending;
if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
return ;
if (!tx_completed) {
if (sta)
atomic_add(tx_airtime,
&sta->airtime[ac].aql_tx_pending);
atomic_add(tx_airtime, &local->aql_total_pending_airtime);
atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]);
return ;
}
if (sta) {
tx_pending = atomic_sub_return(tx_airtime,
&sta->airtime[ac].aql_tx_pending);
if (tx_pending < 0 )
atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
tx_pending, 0 );
}
atomic_sub(tx_airtime, &local->aql_total_pending_airtime);
tx_pending = atomic_sub_return(tx_airtime,
&local->aql_ac_pending_airtime[ac]);
if (WARN_ONCE(tx_pending < 0 ,
"Device %s AC %d pending airtime underflow: %u, %u" ,
wiphy_name(local->hw.wiphy), ac, tx_pending,
tx_airtime)) {
atomic_cmpxchg(&local->aql_ac_pending_airtime[ac],
tx_pending, 0 );
atomic_sub(tx_pending, &local->aql_total_pending_airtime);
}
}
static struct ieee80211_sta_rx_stats *
sta_get_last_rx_stats(struct sta_info *sta, int link_id)
{
struct ieee80211_sta_rx_stats *stats;
struct link_sta_info *link_sta_info;
int cpu;
if (link_id < 0 )
link_sta_info = &sta->deflink;
else
link_sta_info = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
stats = &link_sta_info->rx_stats;
if (!link_sta_info->pcpu_rx_stats)
return stats;
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpustats;
cpustats = per_cpu_ptr(link_sta_info->pcpu_rx_stats, cpu);
if (time_after(cpustats->last_rx, stats->last_rx))
stats = cpustats;
}
return stats;
}
static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
struct rate_info *rinfo)
{
rinfo->bw = STA_STATS_GET(BW, rate);
switch (STA_STATS_GET(TYPE, rate)) {
case STA_STATS_RATE_TYPE_VHT:
rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
if (STA_STATS_GET(SGI, rate))
rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
break ;
case STA_STATS_RATE_TYPE_HT:
rinfo->flags = RATE_INFO_FLAGS_MCS;
rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
if (STA_STATS_GET(SGI, rate))
rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
break ;
case STA_STATS_RATE_TYPE_LEGACY: {
struct ieee80211_supported_band *sband;
u16 brate;
unsigned int shift;
int band = STA_STATS_GET(LEGACY_BAND, rate);
int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
sband = local->hw.wiphy->bands[band];
if (WARN_ON_ONCE(!sband->bitrates))
break ;
brate = sband->bitrates[rate_idx].bitrate;
if (rinfo->bw == RATE_INFO_BW_5)
shift = 2 ;
else if (rinfo->bw == RATE_INFO_BW_10)
shift = 1 ;
else
shift = 0 ;
rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
break ;
}
case STA_STATS_RATE_TYPE_HE:
rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
rinfo->nss = STA_STATS_GET(HE_NSS, rate);
rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
break ;
case STA_STATS_RATE_TYPE_EHT:
rinfo->flags = RATE_INFO_FLAGS_EHT_MCS;
rinfo->mcs = STA_STATS_GET(EHT_MCS, rate);
rinfo->nss = STA_STATS_GET(EHT_NSS, rate);
rinfo->eht_gi = STA_STATS_GET(EHT_GI, rate);
rinfo->eht_ru_alloc = STA_STATS_GET(EHT_RU, rate);
break ;
}
}
static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo,
int link_id)
{
u32 rate = READ_ONCE(sta_get_last_rx_stats(sta, link_id)->last_rate);
if (rate == STA_STATS_RATE_INVALID)
return -EINVAL;
sta_stats_decode_rate(sta->local, rate, rinfo);
return 0 ;
}
static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats,
int tid)
{
unsigned int start;
u64 value;
do {
start = u64_stats_fetch_begin(&rxstats->syncp);
value = rxstats->msdu[tid];
} while (u64_stats_fetch_retry(&rxstats->syncp, start));
return value;
}
static void sta_set_tidstats(struct sta_info *sta,
struct cfg80211_tid_stats *tidstats,
int tid, int link_id)
{
struct ieee80211_local *local = sta->local;
struct link_sta_info *link_sta_info;
int cpu;
if (link_id < 0 )
link_sta_info = &sta->deflink;
else
link_sta_info = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
tidstats->rx_msdu +=
sta_get_tidstats_msdu(&link_sta_info->rx_stats,
tid);
if (link_sta_info->pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(link_sta_info->pcpu_rx_stats,
cpu);
tidstats->rx_msdu +=
sta_get_tidstats_msdu(cpurxs, tid);
}
}
tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
}
if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
tidstats->tx_msdu = link_sta_info->tx_stats.msdu[tid];
}
if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
tidstats->tx_msdu_retries =
link_sta_info->status_stats.msdu_retries[tid];
}
if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
tidstats->tx_msdu_failed =
link_sta_info->status_stats.msdu_failed[tid];
}
if (link_id < 0 && tid < IEEE80211_NUM_TIDS) {
spin_lock_bh(&local->fq.lock);
rcu_read_lock();
tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
ieee80211_fill_txq_stats(&tidstats->txq_stats,
to_txq_info(sta->sta.txq[tid]));
rcu_read_unlock();
spin_unlock_bh(&local->fq.lock);
}
}
static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
{
unsigned int start;
u64 value;
do {
start = u64_stats_fetch_begin(&rxstats->syncp);
value = rxstats->bytes;
} while (u64_stats_fetch_retry(&rxstats->syncp, start));
return value;
}
#ifdef CONFIG_MAC80211_MESH
static void sta_set_mesh_sinfo(struct sta_info *sta,
struct station_info *sinfo)
{
struct ieee80211_local *local = sta->sdata->local;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
BIT_ULL(NL80211_STA_INFO_PLID) |
BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
BIT_ULL(NL80211_STA_INFO_PEER_PM) |
BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) |
BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS);
sinfo->llid = sta->mesh->llid;
sinfo->plid = sta->mesh->plid;
sinfo->plink_state = sta->mesh->plink_state;
if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
sinfo->t_offset = sta->mesh->t_offset;
}
sinfo->local_pm = sta->mesh->local_pm;
sinfo->peer_pm = sta->mesh->peer_pm;
sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
sinfo->connected_to_gate = sta->mesh->connected_to_gate;
sinfo->connected_to_as = sta->mesh->connected_to_as;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
sinfo->airtime_link_metric = airtime_link_metric_get(local, sta);
}
#endif
void sta_set_accumulated_removed_links_sinfo(struct sta_info *sta,
struct station_info *sinfo)
{
/* Accumulating the removed link statistics. */
sinfo->tx_packets = sta->rem_link_stats.tx_packets;
sinfo->rx_packets = sta->rem_link_stats.rx_packets;
sinfo->tx_bytes = sta->rem_link_stats.tx_bytes;
sinfo->rx_bytes = sta->rem_link_stats.rx_bytes;
sinfo->tx_retries = sta->rem_link_stats.tx_retries;
sinfo->tx_failed = sta->rem_link_stats.tx_failed;
sinfo->rx_dropped_misc = sta->rem_link_stats.rx_dropped_misc;
sinfo->beacon_loss_count = sta->rem_link_stats.beacon_loss_count;
sinfo->expected_throughput = sta->rem_link_stats.expected_throughput;
if (sinfo->pertid) {
sinfo->pertid->rx_msdu =
sta->rem_link_stats.pertid_stats.rx_msdu;
sinfo->pertid->tx_msdu =
sta->rem_link_stats.pertid_stats.tx_msdu;
sinfo->pertid->tx_msdu_retries =
sta->rem_link_stats.pertid_stats.tx_msdu_retries;
sinfo->pertid->tx_msdu_failed =
sta->rem_link_stats.pertid_stats.tx_msdu_failed;
}
}
static void sta_set_link_sinfo(struct sta_info *sta,
struct link_station_info *link_sinfo,
struct ieee80211_link_data *link,
bool tidstats)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_sta_rx_stats *last_rxstats;
int i, ac, cpu, link_id = link->link_id;
struct link_sta_info *link_sta_info;
u32 thr = 0 ;
last_rxstats = sta_get_last_rx_stats(sta, link_id);
link_sta_info = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
/* do before driver, so beacon filtering drivers have a
* chance to e . g . just add the number of filtered beacons
* ( or just modify the value entirely , of course )
*/
if (sdata->vif.type == NL80211_IFTYPE_STATION)
link_sinfo->rx_beacon = link->u.mgd.count_beacon_signal;
ether_addr_copy(link_sinfo->addr, link_sta_info->addr);
drv_link_sta_statistics(sta->local, sdata,
link_sta_info->pub,
link_sinfo);
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
link_sinfo->beacon_loss_count =
link->u.mgd.beacon_loss_count;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
}
link_sinfo->inactive_time =
jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta, link_id));
if (!(link_sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
link_sinfo->tx_bytes = 0 ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
link_sinfo->tx_bytes +=
link_sta_info->tx_stats.bytes[ac];
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
link_sinfo->tx_packets = 0 ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
link_sinfo->tx_packets +=
link_sta_info->tx_stats.packets[ac];
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
}
if (!(link_sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
link_sinfo->rx_bytes +=
sta_get_stats_bytes(&link_sta_info->rx_stats);
if (link_sta_info->pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(link_sta_info->pcpu_rx_stats,
cpu);
link_sinfo->rx_bytes +=
sta_get_stats_bytes(cpurxs);
}
}
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
link_sinfo->rx_packets = link_sta_info->rx_stats.packets;
if (link_sta_info->pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(link_sta_info->pcpu_rx_stats,
cpu);
link_sinfo->rx_packets += cpurxs->packets;
}
}
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
link_sinfo->tx_retries =
link_sta_info->status_stats.retry_count;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
link_sinfo->tx_failed =
link_sta_info->status_stats.retry_failed;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
link_sinfo->rx_duration += sta->airtime[ac].rx_airtime;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
link_sinfo->tx_duration += sta->airtime[ac].tx_airtime;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
link_sinfo->airtime_weight = sta->airtime_weight;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
}
link_sinfo->rx_dropped_misc = link_sta_info->rx_stats.dropped;
if (link_sta_info->pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(link_sta_info->pcpu_rx_stats,
cpu);
link_sinfo->rx_dropped_misc += cpurxs->dropped;
}
}
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
!(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
link_sinfo->rx_beacon_signal_avg =
ieee80211_ave_rssi(&sdata->vif, -1 );
}
if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
link_sinfo->signal = (s8)last_rxstats->last_signal;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
}
if (!link_sta_info->pcpu_rx_stats &&
!(link_sinfo->filled &
BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
link_sinfo->signal_avg =
-ewma_signal_read(&link_sta_info->rx_stats_avg.signal);
link_sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
}
}
/* for the average - if pcpu_rx_stats isn't set - rxstats must point to
* the sta - > rx_stats struct , so the check here is fine with and without
* pcpu statistics
*/
if (last_rxstats->chains &&
!(link_sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
if (!link_sta_info->pcpu_rx_stats)
link_sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
link_sinfo->chains = last_rxstats->chains;
for (i = 0 ; i < ARRAY_SIZE(link_sinfo->chain_signal); i++) {
link_sinfo->chain_signal[i] =
last_rxstats->chain_signal_last[i];
link_sinfo->chain_signal_avg[i] =
-ewma_signal_read(
&link_sta_info->rx_stats_avg.chain_signal[i]);
}
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) &&
ieee80211_rate_valid(&link_sta_info->tx_stats.last_rate)) {
sta_set_rate_info_tx(sta, &link_sta_info->tx_stats.last_rate,
&link_sinfo->txrate);
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
if (sta_set_rate_info_rx(sta, &link_sinfo->rxrate,
link_id) == 0 )
link_sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
}
if (tidstats && !cfg80211_link_sinfo_alloc_tid_stats(link_sinfo,
GFP_KERNEL)) {
for (i = 0 ; i < IEEE80211_NUM_TIDS + 1 ; i++)
sta_set_tidstats(sta, &link_sinfo->pertid[i], i,
link_id);
}
link_sinfo->bss_param.flags = 0 ;
if (sdata->vif.bss_conf.use_cts_prot)
link_sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
if (sdata->vif.bss_conf.use_short_preamble)
link_sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
if (sdata->vif.bss_conf.use_short_slot)
link_sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
link_sinfo->bss_param.dtim_period = link->conf->dtim_period;
link_sinfo->bss_param.beacon_interval = link->conf->beacon_int;
thr = sta_get_expected_throughput(sta);
if (thr != 0 ) {
link_sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
link_sinfo->expected_throughput = thr;
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
link_sta_info->status_stats.ack_signal_filled) {
link_sinfo->ack_signal =
link_sta_info->status_stats.last_ack_signal;
link_sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
}
if (!(link_sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
link_sta_info->status_stats.ack_signal_filled) {
link_sinfo->avg_ack_signal =
-(s8)ewma_avg_signal_read(
&link_sta_info->status_stats.avg_ack_signal);
link_sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
}
}
void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
bool tidstats)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
u32 thr = 0 ;
int i, ac, cpu, link_id;
struct ieee80211_sta_rx_stats *last_rxstats;
last_rxstats = sta_get_last_rx_stats(sta, -1 );
sinfo->generation = sdata->local->sta_generation;
/* do before driver, so beacon filtering drivers have a
* chance to e . g . just add the number of filtered beacons
* ( or just modify the value entirely , of course )
*/
if (sdata->vif.type == NL80211_IFTYPE_STATION)
sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal;
drv_sta_statistics(local, sdata, &sta->sta, sinfo);
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
sinfo->beacon_loss_count =
sdata->deflink.u.mgd.beacon_loss_count;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
}
sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
sinfo->assoc_at = sta->assoc_at;
sinfo->inactive_time =
jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta, -1 ));
if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
sinfo->tx_bytes = 0 ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac];
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
sinfo->tx_packets = 0 ;
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
sinfo->tx_packets += sta->deflink.tx_stats.packets[ac];
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
}
if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
sinfo->rx_bytes += sta_get_stats_bytes(&sta->deflink.rx_stats);
if (sta->deflink.pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats,
cpu);
sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
}
}
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
sinfo->rx_packets = sta->deflink.rx_stats.packets;
if (sta->deflink.pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats,
cpu);
sinfo->rx_packets += cpurxs->packets;
}
}
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
sinfo->tx_retries = sta->deflink.status_stats.retry_count;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
sinfo->tx_failed = sta->deflink.status_stats.retry_failed;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
sinfo->rx_duration += sta->airtime[ac].rx_airtime;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
for (ac = 0 ; ac < IEEE80211_NUM_ACS; ac++)
sinfo->tx_duration += sta->airtime[ac].tx_airtime;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
sinfo->airtime_weight = sta->airtime_weight;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
}
sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped;
if (sta->deflink.pcpu_rx_stats) {
for_each_possible_cpu(cpu) {
struct ieee80211_sta_rx_stats *cpurxs;
cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu);
sinfo->rx_dropped_misc += cpurxs->dropped;
}
}
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
!(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
sinfo->rx_beacon_signal_avg =
ieee80211_ave_rssi(&sdata->vif, -1 );
}
if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
sinfo->signal = (s8)last_rxstats->last_signal;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
}
if (!sta->deflink.pcpu_rx_stats &&
!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
sinfo->signal_avg =
-ewma_signal_read(&sta->deflink.rx_stats_avg.signal);
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
}
}
/* for the average - if pcpu_rx_stats isn't set - rxstats must point to
* the sta - > rx_stats struct , so the check here is fine with and without
* pcpu statistics
*/
if (last_rxstats->chains &&
!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
if (!sta->deflink.pcpu_rx_stats)
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
sinfo->chains = last_rxstats->chains;
for (i = 0 ; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
sinfo->chain_signal[i] =
last_rxstats->chain_signal_last[i];
sinfo->chain_signal_avg[i] =
-ewma_signal_read(&sta->deflink.rx_stats_avg.chain_signal[i]);
}
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) &&
!sta->sta.valid_links &&
ieee80211_rate_valid(&sta->deflink.tx_stats.last_rate)) {
sta_set_rate_info_tx(sta, &sta->deflink.tx_stats.last_rate,
&sinfo->txrate);
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) &&
!sta->sta.valid_links) {
if (sta_set_rate_info_rx(sta, &sinfo->rxrate, -1 ) == 0 )
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
}
if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
for (i = 0 ; i < IEEE80211_NUM_TIDS + 1 ; i++)
sta_set_tidstats(sta, &sinfo->pertid[i], i, -1 );
}
#ifdef CONFIG_MAC80211_MESH
if (ieee80211_vif_is_mesh(&sdata->vif))
sta_set_mesh_sinfo(sta, sinfo);
#endif
sinfo->bss_param.flags = 0 ;
if (sdata->vif.bss_conf.use_cts_prot)
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
if (sdata->vif.bss_conf.use_short_preamble)
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
if (sdata->vif.bss_conf.use_short_slot)
sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
sinfo->sta_flags.set = 0 ;
sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
BIT(NL80211_STA_FLAG_WME) |
BIT(NL80211_STA_FLAG_MFP) |
BIT(NL80211_STA_FLAG_AUTHENTICATED) |
BIT(NL80211_STA_FLAG_ASSOCIATED) |
BIT(NL80211_STA_FLAG_TDLS_PEER);
if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
if (sta->sta.wme)
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
if (test_sta_flag(sta, WLAN_STA_MFP))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
if (test_sta_flag(sta, WLAN_STA_AUTH))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
if (test_sta_flag(sta, WLAN_STA_ASSOC))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
thr = sta_get_expected_throughput(sta);
if (thr != 0 ) {
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
sinfo->expected_throughput = thr;
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
sta->deflink.status_stats.ack_signal_filled) {
sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
}
if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
sta->deflink.status_stats.ack_signal_filled) {
sinfo->avg_ack_signal =
-(s8)ewma_avg_signal_read(
&sta->deflink.status_stats.avg_ack_signal);
sinfo->filled |=
BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
}
if (sta->sta.valid_links) {
struct ieee80211_link_data *link;
struct link_sta_info *link_sta;
ether_addr_copy(sinfo->mld_addr, sta->addr);
/* assign valid links first for iteration */
sinfo->valid_links = sta->sta.valid_links;
for_each_valid_link(sinfo, link_id) {
link_sta = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
link = wiphy_dereference(sdata->local->hw.wiphy,
sdata->link[link_id]);
if (!link_sta || !sinfo->links[link_id] || !link) {
sinfo->valid_links &= ~BIT(link_id);
continue ;
}
sta_set_link_sinfo(sta, sinfo->links[link_id],
link, tidstats);
}
}
}
u32 sta_get_expected_throughput(struct sta_info *sta)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
struct rate_control_ref *ref = NULL;
u32 thr = 0 ;
if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
ref = local->rate_ctrl;
/* check if the driver has a SW RC implementation */
if (ref && ref->ops->get_expected_throughput)
thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
else
thr = drv_get_expected_throughput(local, sta);
return thr;
}
unsigned long ieee80211_sta_last_active(struct sta_info *sta, int link_id)
{
struct ieee80211_sta_rx_stats *stats;
struct link_sta_info *link_sta_info;
stats = sta_get_last_rx_stats(sta, link_id);
if (link_id < 0 )
link_sta_info = &sta->deflink;
else
link_sta_info = wiphy_dereference(sta->local->hw.wiphy,
sta->link[link_id]);
if (!link_sta_info->status_stats.last_ack ||
time_after(stats->last_rx, link_sta_info->status_stats.last_ack))
return stats->last_rx;
return link_sta_info->status_stats.last_ack;
}
int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct sta_link_alloc *alloc;
int ret;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED));
/* must represent an MLD from the start */
if (WARN_ON(!sta->sta.valid_links))
return -EINVAL;
if (WARN_ON(sta->sta.valid_links & BIT(link_id) ||
sta->link[link_id]))
return -EBUSY;
alloc = kzalloc(sizeof (*alloc), GFP_KERNEL);
if (!alloc)
return -ENOMEM;
ret = sta_info_alloc_link(sdata->local, &alloc->info, GFP_KERNEL);
if (ret) {
kfree(alloc);
return ret;
}
sta_info_add_link(sta, link_id, &alloc->info, &alloc->sta);
ieee80211_link_sta_debugfs_add(&alloc->info);
return 0 ;
}
void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id)
{
lockdep_assert_wiphy(sta->sdata->local->hw.wiphy);
WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED));
sta_remove_link(sta, link_id, false );
}
int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct link_sta_info *link_sta;
u16 old_links = sta->sta.valid_links;
u16 new_links = old_links | BIT(link_id);
int ret;
link_sta = rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&sdata->local->hw.wiphy->mtx));
if (WARN_ON(old_links == new_links || !link_sta))
return -EINVAL;
rcu_read_lock();
if (link_sta_info_hash_lookup(sdata->local, link_sta->addr)) {
rcu_read_unlock();
return -EALREADY;
}
/* we only modify under the mutex so this is fine */
rcu_read_unlock();
sta->sta.valid_links = new_links;
if (WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)))
goto hash;
ieee80211_recalc_min_chandef(sdata, link_id);
/* Ensure the values are updated for the driver,
* redone by sta_remove_link on failure .
*/
ieee80211_sta_recalc_aggregates(&sta->sta);
ret = drv_change_sta_links(sdata->local, sdata, &sta->sta,
old_links, new_links);
if (ret) {
sta->sta.valid_links = old_links;
sta_remove_link(sta, link_id, false );
return ret;
}
hash:
ret = link_sta_info_hash_add(sdata->local, link_sta);
WARN_ON(ret);
return 0 ;
}
void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
u16 old_links = sta->sta.valid_links;
lockdep_assert_wiphy(sdata->local->hw.wiphy);
sta->sta.valid_links &= ~BIT(link_id);
if (!WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)))
drv_change_sta_links(sdata->local, sdata, &sta->sta,
old_links, sta->sta.valid_links);
sta_remove_link(sta, link_id, true );
}
void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta,
const u8 *ext_capab,
unsigned int ext_capab_len)
{
u8 val;
sta->sta.max_amsdu_subframes = 0 ;
if (ext_capab_len < 8 )
return ;
/* The sender might not have sent the last bit, consider it to be 0 */
val = u8_get_bits(ext_capab[7 ], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB);
/* we did get all the bits, take the MSB as well */
if (ext_capab_len >= 9 )
val |= u8_get_bits(ext_capab[8 ],
WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1 ;
if (val)
sta->sta.max_amsdu_subframes = 4 << (4 - val);
}
#ifdef CONFIG_LOCKDEP
bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta)
{
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
return lockdep_is_held(&sta->local->hw.wiphy->mtx);
}
EXPORT_SYMBOL(lockdep_sta_mutex_held);
#endif
Messung V0.5 in Prozent C=98 H=91 G=94
¤ Dauer der Verarbeitung: 0.44 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland
2026-10-10
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