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mac80211: optimise station flags

Browse Source 
The flaglock in struct sta_info has long been
something that I wanted to get rid of, this
finally does the conversion to atomic bitops.

The conversion itself is straight-forward in
most places, a few things needed to change a
bit since we can no longer use multiple bits
at the same time.

On x86-64, this is a fairly significant code
size reduction:
   text	   data	    bss	    dec	    hex
 427861	  23648	   1008	 452517	  6e7a5	before
 425383	  23648	    976	 450007	  6ddd7	after

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-09-29 16:04:36 +02:00 committed by John W. Linville
parent deeaee197b
commit c2c98fdeb5
18 changed files with 173 additions and 194 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/mac80211/agg-rx.c
View File

@ -223,7 +223,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
status = WLAN_STATUS_REQUEST_DECLINED;
if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Suspend in progress. "
"Denying ADDBA request\n");

2
net/mac80211/agg-tx.c
View File

@ -382,7 +382,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
sdata->vif.type != NL80211_IFTYPE_AP)
return -EINVAL;
if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "BA sessions blocked. "
"Denying BA session request\n");

44
net/mac80211/cfg.c
View File

@ -668,7 +668,6 @@ static void sta_apply_parameters(struct ieee80211_local *local,
struct sta_info *sta,
struct station_parameters *params)
{
unsigned long flags;
u32 rates;
int i, j;
struct ieee80211_supported_band *sband;
@ -677,49 +676,53 @@ static void sta_apply_parameters(struct ieee80211_local *local,
sband = local->hw.wiphy->bands[local->oper_channel->band];
spin_lock_irqsave(&sta->flaglock, flags);
mask = params->sta_flags_mask;
set = params->sta_flags_set;
if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
sta->flags &= ~WLAN_STA_AUTHORIZED;
if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
sta->flags |= WLAN_STA_AUTHORIZED;
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
else
clear_sta_flag(sta, WLAN_STA_AUTHORIZED);
}
if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
sta->flags |= WLAN_STA_SHORT_PREAMBLE;
set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
else
clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
}
if (mask & BIT(NL80211_STA_FLAG_WME)) {
sta->flags &= ~WLAN_STA_WME;
sta->sta.wme = false;
if (set & BIT(NL80211_STA_FLAG_WME)) {
sta->flags |= WLAN_STA_WME;
set_sta_flag(sta, WLAN_STA_WME);
sta->sta.wme = true;
} else {
clear_sta_flag(sta, WLAN_STA_WME);
sta->sta.wme = false;
}
}
if (mask & BIT(NL80211_STA_FLAG_MFP)) {
sta->flags &= ~WLAN_STA_MFP;
if (set & BIT(NL80211_STA_FLAG_MFP))
sta->flags |= WLAN_STA_MFP;
set_sta_flag(sta, WLAN_STA_MFP);
else
clear_sta_flag(sta, WLAN_STA_MFP);
}
if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
sta->flags &= ~WLAN_STA_AUTH;
if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
sta->flags |= WLAN_STA_AUTH;
set_sta_flag(sta, WLAN_STA_AUTH);
else
clear_sta_flag(sta, WLAN_STA_AUTH);
}
if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
sta->flags &= ~WLAN_STA_TDLS_PEER;
if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
sta->flags |= WLAN_STA_TDLS_PEER;
set_sta_flag(sta, WLAN_STA_TDLS_PEER);
else
clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
}
spin_unlock_irqrestore(&sta->flaglock, flags);
if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
sta->sta.uapsd_queues = params->uapsd_queues;
@ -815,12 +818,13 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
if (!sta)
return -ENOMEM;
sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
set_sta_flag(sta, WLAN_STA_AUTH);
set_sta_flag(sta, WLAN_STA_ASSOC);
sta_apply_parameters(local, sta, params);
/* Only TDLS-supporting stations can add TDLS peers */
if ((sta->flags & WLAN_STA_TDLS_PEER) &&
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
!((wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
sdata->vif.type == NL80211_IFTYPE_STATION))
return -ENOTSUPP;
@ -880,7 +884,7 @@ static int ieee80211_change_station(struct wiphy *wiphy,
/* The TDLS bit cannot be toggled after the STA was added */
if ((params->sta_flags_mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
!!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) !=
!!test_sta_flags(sta, WLAN_STA_TDLS_PEER)) {
!!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
rcu_read_unlock();
return -EINVAL;
}
@ -2449,7 +2453,7 @@ static int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
return -ENOLINK;
}
set_sta_flags(sta, WLAN_STA_TDLS_PEER_AUTH);
set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
rcu_read_unlock();
break;
case NL80211_TDLS_DISABLE_LINK:

20
net/mac80211/debugfs_sta.c
View File

@ -58,17 +58,17 @@ static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
{
char buf[100];
struct sta_info *sta = file->private_data;
u32 staflags = get_sta_flags(sta);
int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s",
staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
staflags & WLAN_STA_PS_STA ? "PS (sta)\n" : "",
staflags & WLAN_STA_PS_DRIVER ? "PS (driver)\n" : "",
staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
staflags & WLAN_STA_WME ? "WME\n" : "",
staflags & WLAN_STA_WDS ? "WDS\n" : "",
staflags & WLAN_STA_MFP ? "MFP\n" : "");
test_sta_flag(sta, WLAN_STA_AUTH) ? "AUTH\n" : "",
test_sta_flag(sta, WLAN_STA_ASSOC) ? "ASSOC\n" : "",
test_sta_flag(sta, WLAN_STA_PS_STA) ? "PS (sta)\n" : "",
test_sta_flag(sta, WLAN_STA_PS_DRIVER) ? "PS (driver)\n" : "",
test_sta_flag(sta, WLAN_STA_AUTHORIZED) ? "AUTHORIZED\n" : "",
test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE) ? "SHORT PREAMBLE\n" : "",
test_sta_flag(sta, WLAN_STA_WME) ? "WME\n" : "",
test_sta_flag(sta, WLAN_STA_WDS) ? "WDS\n" : "",
test_sta_flag(sta, WLAN_STA_MFP) ? "MFP\n" : "");
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(flags);

2
net/mac80211/ht.c
View File

@ -130,7 +130,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
* down by the code that set the flag, so this
* need not run.
*/
if (test_sta_flags(sta, WLAN_STA_BLOCK_BA))
if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
return;
mutex_lock(&sta->ampdu_mlme.mtx);

4
net/mac80211/ibss.c
View File

@ -314,7 +314,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
}
if (sta && elems->wmm_info)
set_sta_flags(sta, WLAN_STA_WME);
set_sta_flag(sta, WLAN_STA_WME);
rcu_read_unlock();
}
@ -452,7 +452,7 @@ struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
return NULL;
sta->last_rx = jiffies;
set_sta_flags(sta, WLAN_STA_AUTHORIZED);
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
/* make sure mandatory rates are always added */
sta->sta.supp_rates[band] = supp_rates |

4
net/mac80211/iface.c
View File

@ -299,8 +299,8 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
goto err_del_interface;
}
/* no locking required since STA is not live yet */
sta->flags |= WLAN_STA_AUTHORIZED;
/* no atomic bitop required since STA is not live yet */
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
res = sta_info_insert(sta);
if (res) {

4
net/mac80211/key.c
View File

@ -464,7 +464,7 @@ int ieee80211_key_link(struct ieee80211_key *key,
* some hardware cannot handle TKIP with QoS, so
* we indicate whether QoS could be in use.
*/
if (test_sta_flags(sta, WLAN_STA_WME))
if (test_sta_flag(sta, WLAN_STA_WME))
key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA;
} else {
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
@ -478,7 +478,7 @@ int ieee80211_key_link(struct ieee80211_key *key,
/* same here, the AP could be using QoS */
ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid);
if (ap) {
if (test_sta_flags(ap, WLAN_STA_WME))
if (test_sta_flag(ap, WLAN_STA_WME))
key->conf.flags |=
IEEE80211_KEY_FLAG_WMM_STA;
}

8
net/mac80211/mesh_plink.c
View File

@ -92,7 +92,9 @@ static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
if (!sta)
return NULL;
sta->flags = WLAN_STA_AUTHORIZED | WLAN_STA_AUTH | WLAN_STA_WME;
set_sta_flag(sta, WLAN_STA_AUTH);
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
set_sta_flag(sta, WLAN_STA_WME);
sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
rate_control_rate_init(sta);
@ -383,7 +385,7 @@ int mesh_plink_open(struct sta_info *sta)
__le16 llid;
struct ieee80211_sub_if_data *sdata = sta->sdata;
if (!test_sta_flags(sta, WLAN_STA_AUTH))
if (!test_sta_flag(sta, WLAN_STA_AUTH))
return -EPERM;
spin_lock_bh(&sta->lock);
@ -503,7 +505,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
return;
}
if (sta && !test_sta_flags(sta, WLAN_STA_AUTH)) {
if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
mpl_dbg("Mesh plink: Action frame from non-authed peer\n");
rcu_read_unlock();
return;

22
net/mac80211/mlme.c
View File

@ -627,7 +627,7 @@ static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_managed *mgd = &sdata->u.mgd;
struct sta_info *sta = NULL;
u32 sta_flags = 0;
bool authorized = false;
if (!mgd->powersave)
return false;
@ -645,13 +645,10 @@ static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
rcu_read_lock();
sta = sta_info_get(sdata, mgd->bssid);
if (sta)
sta_flags = get_sta_flags(sta);
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
rcu_read_unlock();
if (!(sta_flags & WLAN_STA_AUTHORIZED))
return false;
return true;
return authorized;
}
/* need to hold RTNL or interface lock */
@ -1095,7 +1092,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, bssid);
if (sta) {
set_sta_flags(sta, WLAN_STA_BLOCK_BA);
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(sta, tx);
}
mutex_unlock(&local->sta_mtx);
@ -1513,10 +1510,11 @@ static bool ieee80211_assoc_success(struct ieee80211_work *wk,
return false;
}
set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
WLAN_STA_ASSOC_AP);
set_sta_flag(sta, WLAN_STA_AUTH);
set_sta_flag(sta, WLAN_STA_ASSOC);
set_sta_flag(sta, WLAN_STA_ASSOC_AP);
if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
set_sta_flags(sta, WLAN_STA_AUTHORIZED);
set_sta_flag(sta, WLAN_STA_AUTHORIZED);
rates = 0;
basic_rates = 0;
@ -1575,10 +1573,10 @@ static bool ieee80211_assoc_success(struct ieee80211_work *wk,
rate_control_rate_init(sta);
if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
set_sta_flags(sta, WLAN_STA_MFP);
set_sta_flag(sta, WLAN_STA_MFP);
if (elems.wmm_param)
set_sta_flags(sta, WLAN_STA_WME);
set_sta_flag(sta, WLAN_STA_WME);
/* sta_info_reinsert will also unlock the mutex lock */
err = sta_info_reinsert(sta);

2
net/mac80211/pm.c
View File

@ -42,7 +42,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list) {
set_sta_flags(sta, WLAN_STA_BLOCK_BA);
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(sta, true);
}
mutex_unlock(&local->sta_mtx);

28
net/mac80211/rx.c
View File

@ -841,7 +841,7 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
ieee80211_is_pspoll(hdr->frame_control)) &&
rx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
rx->sdata->vif.type != NL80211_IFTYPE_WDS &&
(!rx->sta || !test_sta_flags(rx->sta, WLAN_STA_ASSOC)))) {
(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) {
if (rx->sta && rx->sta->dummy &&
ieee80211_is_data_present(hdr->frame_control)) {
u16 ethertype;
@ -1110,7 +1110,7 @@ static void ap_sta_ps_start(struct sta_info *sta)
struct ieee80211_local *local = sdata->local;
atomic_inc(&sdata->bss->num_sta_ps);
set_sta_flags(sta, WLAN_STA_PS_STA);
set_sta_flag(sta, WLAN_STA_PS_STA);
if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
@ -1130,7 +1130,7 @@ static void ap_sta_ps_end(struct sta_info *sta)
sdata->name, sta->sta.addr, sta->sta.aid);
#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
if (test_sta_flags(sta, WLAN_STA_PS_DRIVER)) {
if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
printk(KERN_DEBUG "%s: STA %pM aid %d driver-ps-blocked\n",
sdata->name, sta->sta.addr, sta->sta.aid);
@ -1149,7 +1149,7 @@ int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start)
WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS));
/* Don't let the same PS state be set twice */
in_ps = test_sta_flags(sta_inf, WLAN_STA_PS_STA);
in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA);
if ((start && in_ps) || (!start && !in_ps))
return -EINVAL;
@ -1190,15 +1190,15 @@ ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
* the uAPSD case, the station will probably be marked asleep,
* in the PS-Poll case the station must be confused ...
*/
if (!test_sta_flags(rx->sta, WLAN_STA_PS_STA))
if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA))
return RX_CONTINUE;
if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) {
if (!test_sta_flags(rx->sta, WLAN_STA_SP)) {
if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER))
if (!test_sta_flag(rx->sta, WLAN_STA_SP)) {
if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
ieee80211_sta_ps_deliver_poll_response(rx->sta);
else
set_sta_flags(rx->sta, WLAN_STA_PSPOLL);
set_sta_flag(rx->sta, WLAN_STA_PSPOLL);
}
/* Free PS Poll skb here instead of returning RX_DROP that would
@ -1225,13 +1225,13 @@ ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx)
return RX_CONTINUE;
/* if we are in a service period, do nothing */
if (test_sta_flags(rx->sta, WLAN_STA_SP))
if (test_sta_flag(rx->sta, WLAN_STA_SP))
return RX_CONTINUE;
if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER))
if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER))
ieee80211_sta_ps_deliver_uapsd(rx->sta);
else
set_sta_flags(rx->sta, WLAN_STA_UAPSD);
set_sta_flag(rx->sta, WLAN_STA_UAPSD);
}
return RX_CONTINUE;
@ -1295,7 +1295,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
!(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
(rx->sdata->vif.type == NL80211_IFTYPE_AP ||
rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
if (test_sta_flags(sta, WLAN_STA_PS_STA)) {
if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
/*
* Ignore doze->wake transitions that are
* indicated by non-data frames, the standard
@ -1570,7 +1570,7 @@ static int
ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx)
{
if (unlikely(!rx->sta ||
!test_sta_flags(rx->sta, WLAN_STA_AUTHORIZED)))
!test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED)))
return -EACCES;
return 0;
@ -1613,7 +1613,7 @@ ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
if (status->flag & RX_FLAG_DECRYPTED)
return 0;
if (rx->sta && test_sta_flags(rx->sta, WLAN_STA_MFP)) {
if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) {
if (unlikely(!ieee80211_has_protected(fc) &&
ieee80211_is_unicast_robust_mgmt_frame(rx->skb) &&
rx->key)) {

35
net/mac80211/sta_info.c
View File

@ -244,22 +244,22 @@ static void sta_unblock(struct work_struct *wk)
if (sta->dead)
return;
if (!test_sta_flags(sta, WLAN_STA_PS_STA))
if (!test_sta_flag(sta, WLAN_STA_PS_STA))
ieee80211_sta_ps_deliver_wakeup(sta);
else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) {
clear_sta_flags(sta, WLAN_STA_PS_DRIVER);
else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) {
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
local_bh_disable();
ieee80211_sta_ps_deliver_poll_response(sta);
local_bh_enable();
} else if (test_and_clear_sta_flags(sta, WLAN_STA_UAPSD)) {
clear_sta_flags(sta, WLAN_STA_PS_DRIVER);
} else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) {
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
local_bh_disable();
ieee80211_sta_ps_deliver_uapsd(sta);
local_bh_enable();
} else
clear_sta_flags(sta, WLAN_STA_PS_DRIVER);
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
}
static int sta_prepare_rate_control(struct ieee80211_local *local,
@ -292,7 +292,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
return NULL;
spin_lock_init(&sta->lock);
spin_lock_init(&sta->flaglock);
INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
mutex_init(&sta->ampdu_mlme.mtx);
@ -871,7 +870,7 @@ static int __must_check __sta_info_destroy(struct sta_info *sta)
* sessions -- block that to make sure the tear-down
* will be sufficient.
*/
set_sta_flags(sta, WLAN_STA_BLOCK_BA);
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(sta, true);
spin_lock_irqsave(&local->sta_lock, flags);
@ -892,10 +891,13 @@ static int __must_check __sta_info_destroy(struct sta_info *sta)
sta->dead = true;
if (test_and_clear_sta_flags(sta,
WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) {
if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
BUG_ON(!sdata->bss);
clear_sta_flag(sta, WLAN_STA_PS_STA);
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
atomic_dec(&sdata->bss->num_sta_ps);
sta_info_recalc_tim(sta);
}
@ -1116,7 +1118,8 @@ static void clear_sta_ps_flags(void *_sta)
{
struct sta_info *sta = _sta;
clear_sta_flags(sta, WLAN_STA_PS_DRIVER | WLAN_STA_PS_STA);
clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
clear_sta_flag(sta, WLAN_STA_PS_STA);
}
/* powersave support code */
@ -1127,7 +1130,7 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
struct sk_buff_head pending;
int filtered = 0, buffered = 0, ac;
clear_sta_flags(sta, WLAN_STA_SP);
clear_sta_flag(sta, WLAN_STA_SP);
BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1);
sta->driver_buffered_tids = 0;
@ -1173,7 +1176,7 @@ static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb;
int size = sizeof(*nullfunc);
__le16 fc;
bool qos = test_sta_flags(sta, WLAN_STA_WME);
bool qos = test_sta_flag(sta, WLAN_STA_WME);
struct ieee80211_tx_info *info;
if (qos) {
@ -1241,7 +1244,7 @@ ieee80211_sta_ps_deliver_response(struct sta_info *sta,
struct sk_buff_head frames;
/* Service or PS-Poll period starts */
set_sta_flags(sta, WLAN_STA_SP);
set_sta_flag(sta, WLAN_STA_SP);
__skb_queue_head_init(&frames);
@ -1453,8 +1456,8 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
trace_api_sta_block_awake(sta->local, pubsta, block);
if (block)
set_sta_flags(sta, WLAN_STA_PS_DRIVER);
else if (test_sta_flags(sta, WLAN_STA_PS_DRIVER))
set_sta_flag(sta, WLAN_STA_PS_DRIVER);
else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER))
ieee80211_queue_work(hw, &sta->drv_unblock_wk);
}
EXPORT_SYMBOL(ieee80211_sta_block_awake);

104
net/mac80211/sta_info.h
View File

@ -19,7 +19,8 @@
/**
* enum ieee80211_sta_info_flags - Stations flags
*
* These flags are used with &struct sta_info's @flags member.
* These flags are used with &struct sta_info's @flags member, but
* only indirectly with set_sta_flag() and friends.
*
* @WLAN_STA_AUTH: Station is authenticated.
* @WLAN_STA_ASSOC: Station is associated.
@ -53,23 +54,23 @@
* reply to other uAPSD trigger frames or PS-Poll.
*/
enum ieee80211_sta_info_flags {
WLAN_STA_AUTH = 1<<0,
WLAN_STA_ASSOC = 1<<1,
WLAN_STA_PS_STA = 1<<2,
WLAN_STA_AUTHORIZED = 1<<3,
WLAN_STA_SHORT_PREAMBLE = 1<<4,
WLAN_STA_ASSOC_AP = 1<<5,
WLAN_STA_WME = 1<<6,
WLAN_STA_WDS = 1<<7,
WLAN_STA_CLEAR_PS_FILT = 1<<9,
WLAN_STA_MFP = 1<<10,
WLAN_STA_BLOCK_BA = 1<<11,
WLAN_STA_PS_DRIVER = 1<<12,
WLAN_STA_PSPOLL = 1<<13,
WLAN_STA_TDLS_PEER = 1<<15,
WLAN_STA_TDLS_PEER_AUTH = 1<<16,
WLAN_STA_UAPSD = 1<<17,
WLAN_STA_SP = 1<<18,
WLAN_STA_AUTH,
WLAN_STA_ASSOC,
WLAN_STA_PS_STA,
WLAN_STA_AUTHORIZED,
WLAN_STA_SHORT_PREAMBLE,
WLAN_STA_ASSOC_AP,
WLAN_STA_WME,
WLAN_STA_WDS,
WLAN_STA_CLEAR_PS_FILT,
WLAN_STA_MFP,
WLAN_STA_BLOCK_BA,
WLAN_STA_PS_DRIVER,
WLAN_STA_PSPOLL,
WLAN_STA_TDLS_PEER,
WLAN_STA_TDLS_PEER_AUTH,
WLAN_STA_UAPSD,
WLAN_STA_SP,
};
#define STA_TID_NUM 16
@ -212,10 +213,9 @@ struct sta_ampdu_mlme {
* @last_rx_rate_flag: rx status flag of the last data packet
* @lock: used for locking all fields that require locking, see comments
* in the header file.
* @flaglock: spinlock for flags accesses
* @drv_unblock_wk: used for driver PS unblocking
* @listen_interval: listen interval of this station, when we're acting as AP
* @flags: STA flags, see &enum ieee80211_sta_info_flags
* @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
* @ps_tx_buf: buffers (per AC) of frames to transmit to this station
* when it leaves power saving state or polls
* @tx_filtered: buffers (per AC) of frames we already tried to
@ -272,7 +272,6 @@ struct sta_info {
struct rate_control_ref *rate_ctrl;
void *rate_ctrl_priv;
spinlock_t lock;
spinlock_t flaglock;
struct work_struct drv_unblock_wk;
@ -282,11 +281,8 @@ struct sta_info {
bool uploaded;
/*
* frequently updated, locked with own spinlock (flaglock),
* use the accessors defined below
*/
u32 flags;
/* use the accessors defined below */
unsigned long _flags;
/*
* STA powersave frame queues, no more than the internal
@ -370,60 +366,28 @@ static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
return NL80211_PLINK_LISTEN;
}
static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
static inline void set_sta_flag(struct sta_info *sta,
enum ieee80211_sta_info_flags flag)
{
unsigned long irqfl;
spin_lock_irqsave(&sta->flaglock, irqfl);
sta->flags |= flags;
spin_unlock_irqrestore(&sta->flaglock, irqfl);
set_bit(flag, &sta->_flags);
}
static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
static inline void clear_sta_flag(struct sta_info *sta,
enum ieee80211_sta_info_flags flag)
{
unsigned long irqfl;
spin_lock_irqsave(&sta->flaglock, irqfl);
sta->flags &= ~flags;
spin_unlock_irqrestore(&sta->flaglock, irqfl);
clear_bit(flag, &sta->_flags);
}
static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
static inline int test_sta_flag(struct sta_info *sta,
enum ieee80211_sta_info_flags flag)
{
u32 ret;
unsigned long irqfl;
spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags & flags;
spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
return test_bit(flag, &sta->_flags);
}
static inline u32 test_and_clear_sta_flags(struct sta_info *sta,
const u32 flags)
static inline int test_and_clear_sta_flag(struct sta_info *sta,
enum ieee80211_sta_info_flags flag)
{
u32 ret;
unsigned long irqfl;
spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags & flags;
sta->flags &= ~flags;
spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
}
static inline u32 get_sta_flags(struct sta_info *sta)
{
u32 ret;
unsigned long irqfl;
spin_lock_irqsave(&sta->flaglock, irqfl);
ret = sta->flags;
spin_unlock_irqrestore(&sta->flaglock, irqfl);
return ret;
return test_and_clear_bit(flag, &sta->_flags);
}
void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,

12
net/mac80211/status.c
View File

@ -96,7 +96,7 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
* packet. If the STA went to power save mode, this will happen
* when it wakes up for the next time.
*/
set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
/*
* This code races in the following way:
@ -132,7 +132,7 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
* changes before calling TX status events if ordering can be
* unknown.
*/
if (test_sta_flags(sta, WLAN_STA_PS_STA) &&
if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
skb_queue_tail(&sta->tx_filtered[ac], skb);
sta_info_recalc_tim(sta);
@ -144,7 +144,7 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
return;
}
if (!test_sta_flags(sta, WLAN_STA_PS_STA) &&
if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
!(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
/* Software retry the packet once */
info->flags |= IEEE80211_TX_INTFL_RETRIED;
@ -157,7 +157,7 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
wiphy_debug(local->hw.wiphy,
"dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
skb_queue_len(&sta->tx_filtered[ac]),
!!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies);
!!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
#endif
dev_kfree_skb(skb);
}
@ -285,10 +285,10 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
continue;
if (info->flags & IEEE80211_TX_STATUS_EOSP)
clear_sta_flags(sta, WLAN_STA_SP);
clear_sta_flag(sta, WLAN_STA_SP);
acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
if (!acked && test_sta_flags(sta, WLAN_STA_PS_STA)) {
if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
/*
* The STA is in power save mode, so assume
* that this TX packet failed because of that.

68
net/mac80211/tx.c
View File

@ -253,7 +253,7 @@ ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
u32 sta_flags;
bool assoc = false;
if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
return TX_CONTINUE;
@ -284,10 +284,11 @@ ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
if (tx->flags & IEEE80211_TX_PS_BUFFERED)
return TX_CONTINUE;
sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0;
if (tx->sta)
assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
if (unlikely(!(sta_flags & WLAN_STA_ASSOC) &&
if (unlikely(!assoc &&
tx->sdata->vif.type != NL80211_IFTYPE_ADHOC &&
ieee80211_is_data(hdr->frame_control))) {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
@ -427,7 +428,7 @@ static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
if (!ieee80211_is_mgmt(fc))
return 0;
if (sta == NULL || !test_sta_flags(sta, WLAN_STA_MFP))
if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
return 0;
if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *)
@ -444,7 +445,6 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
struct ieee80211_local *local = tx->local;
u32 staflags;
if (unlikely(!sta ||
ieee80211_is_probe_resp(hdr->frame_control) ||
@ -453,9 +453,8 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
ieee80211_is_reassoc_resp(hdr->frame_control)))
return TX_CONTINUE;
staflags = get_sta_flags(sta);
if (unlikely((staflags & (WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) &&
if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
test_sta_flag(sta, WLAN_STA_PS_DRIVER)) &&
!(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE))) {
int ac = skb_get_queue_mapping(tx->skb);
@ -496,7 +495,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
return TX_QUEUED;
}
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
else if (unlikely(staflags & WLAN_STA_PS_STA)) {
else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
printk(KERN_DEBUG
"%s: STA %pM in PS mode, but polling/in SP -> send frame\n",
tx->sdata->name, sta->sta.addr);
@ -557,7 +556,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
(!ieee80211_is_robust_mgmt_frame(hdr) ||
(ieee80211_is_action(hdr->frame_control) &&
tx->sta && test_sta_flags(tx->sta, WLAN_STA_MFP)))) {
tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))) {
I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
return TX_DROP;
} else
@ -616,7 +615,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
u32 len;
bool inval = false, rts = false, short_preamble = false;
struct ieee80211_tx_rate_control txrc;
u32 sta_flags;
bool assoc = false;
memset(&txrc, 0, sizeof(txrc));
@ -652,17 +651,17 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
*/
if (tx->sdata->vif.bss_conf.use_short_preamble &&
(ieee80211_is_data(hdr->frame_control) ||
(tx->sta && test_sta_flags(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
(tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
txrc.short_preamble = short_preamble = true;
sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0;
if (tx->sta)
assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
/*
* Lets not bother rate control if we're associated and cannot
* talk to the sta. This should not happen.
*/
if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) &&
(sta_flags & WLAN_STA_ASSOC) &&
if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
!rate_usable_index_exists(sband, &tx->sta->sta),
"%s: Dropped data frame as no usable bitrate found while "
"scanning and associated. Target station: "
@ -1278,7 +1277,7 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
if (!tx->sta)
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
else if (test_and_clear_sta_flags(tx->sta, WLAN_STA_CLEAR_PS_FILT))
else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
@ -1728,7 +1727,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
int encaps_len, skip_header_bytes;
int nh_pos, h_pos;
struct sta_info *sta = NULL;
u32 sta_flags = 0;
bool wme_sta = false, authorized = false, tdls_auth = false;
struct sk_buff *tmp_skb;
bool tdls_direct = false;
@ -1754,7 +1753,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
memcpy(hdr.addr3, skb->data, ETH_ALEN);
memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
hdrlen = 30;
sta_flags = get_sta_flags(sta);
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
wme_sta = test_sta_flag(sta, WLAN_STA_WME);
}
rcu_read_unlock();
if (sta)
@ -1843,10 +1843,19 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
#endif
case NL80211_IFTYPE_STATION:
if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
bool tdls_peer = false;
rcu_read_lock();
sta = sta_info_get(sdata, skb->data);
if (sta)
sta_flags = get_sta_flags(sta);
if (sta) {
authorized = test_sta_flag(sta,
WLAN_STA_AUTHORIZED);
wme_sta = test_sta_flag(sta, WLAN_STA_WME);
tdls_peer = test_sta_flag(sta,
WLAN_STA_TDLS_PEER);
tdls_auth = test_sta_flag(sta,
WLAN_STA_TDLS_PEER_AUTH);
}
rcu_read_unlock();
/*
@ -1854,16 +1863,14 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
* directly. Otherwise, allow TDLS setup frames
* to be transmitted indirectly.
*/
tdls_direct =
(sta_flags & WLAN_STA_TDLS_PEER) &&
((sta_flags & WLAN_STA_TDLS_PEER_AUTH) ||
tdls_direct = tdls_peer && (tdls_auth ||
!(ethertype == ETH_P_TDLS && skb->len > 14 &&
skb->data[14] == WLAN_TDLS_SNAP_RFTYPE));
}
if (tdls_direct) {
/* link during setup - throw out frames to peer */
if (!(sta_flags & WLAN_STA_TDLS_PEER_AUTH)) {
if (!tdls_auth) {
ret = NETDEV_TX_OK;
goto fail;
}
@ -1912,17 +1919,19 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
if (!is_multicast_ether_addr(hdr.addr1)) {
rcu_read_lock();
sta = sta_info_get(sdata, hdr.addr1);
if (sta)
sta_flags = get_sta_flags(sta);
if (sta) {
authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
wme_sta = test_sta_flag(sta, WLAN_STA_WME);
}
rcu_read_unlock();
}
/* For mesh, the use of the QoS header is mandatory */
if (ieee80211_vif_is_mesh(&sdata->vif))
sta_flags |= WLAN_STA_WME;
wme_sta = true;
/* receiver and we are QoS enabled, use a QoS type frame */
if ((sta_flags & WLAN_STA_WME) && local->hw.queues >= 4) {
if (wme_sta && local->hw.queues >= 4) {
fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
hdrlen += 2;
}
@ -1932,8 +1941,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
* EAPOL frames from the local station.
*/
if (!ieee80211_vif_is_mesh(&sdata->vif) &&
unlikely(!is_multicast_ether_addr(hdr.addr1) &&
!(sta_flags & WLAN_STA_AUTHORIZED) &&
unlikely(!is_multicast_ether_addr(hdr.addr1) && !authorized &&
!(cpu_to_be16(ethertype) == sdata->control_port_protocol &&
compare_ether_addr(sdata->vif.addr,
skb->data + ETH_ALEN) == 0))) {

2
net/mac80211/util.c
View File

@ -1122,7 +1122,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
list_for_each_entry(sta, &local->sta_list, list) {
ieee80211_sta_tear_down_BA_sessions(sta, true);
clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
}
mutex_unlock(&local->sta_mtx);

4
net/mac80211/wme.c
View File

@ -72,7 +72,7 @@ u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
case NL80211_IFTYPE_AP_VLAN:
sta = rcu_dereference(sdata->u.vlan.sta);
if (sta) {
qos = get_sta_flags(sta) & WLAN_STA_WME;
qos = test_sta_flag(sta, WLAN_STA_WME);
break;
}
case NL80211_IFTYPE_AP:
@ -99,7 +99,7 @@ u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
if (!sta && ra && !is_multicast_ether_addr(ra)) {
sta = sta_info_get(sdata, ra);
if (sta)
qos = get_sta_flags(sta) & WLAN_STA_WME;
qos = test_sta_flag(sta, WLAN_STA_WME);
}
rcu_read_unlock();