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mac80211: Add capability to enable/disable beaconing

Browse source 
This patch adds a flag to notify drivers to start and stop
beaconing when needed, for example, during a scan run. Based
on Sujith's first patch to do the same, but now disables
beaconing for all virtual interfaces while scanning, has a
separate change flag and tracks user-space requests.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-01-22 18:07:31 +01:00 committed by John W. Linville
parent 07c1e85251
commit 078e1e60dd
6 changed files with 66 additions and 14 deletions
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9
include/net/mac80211.h
View file

@ -646,10 +646,12 @@ struct ieee80211_if_init_conf {
* @IEEE80211_IFCC_BSSID: The BSSID changed.
* @IEEE80211_IFCC_BEACON: The beacon for this interface changed
* (currently AP and MESH only), use ieee80211_beacon_get().
* @IEEE80211_IFCC_BEACON_ENABLED: The enable_beacon value changed.
*/
enum ieee80211_if_conf_change {
IEEE80211_IFCC_BSSID = BIT(0),
IEEE80211_IFCC_BEACON = BIT(1),
IEEE80211_IFCC_BSSID = BIT(0),
IEEE80211_IFCC_BEACON = BIT(1),
IEEE80211_IFCC_BEACON_ENABLED = BIT(2),
};
/**
@ -657,6 +659,8 @@ enum ieee80211_if_conf_change {
*
* @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
* @bssid: BSSID of the network we are associated to/creating.
* @enable_beacon: Indicates whether beacons can be sent.
* This is valid only for AP/IBSS/MESH modes.
*
* This structure is passed to the config_interface() callback of
* &struct ieee80211_hw.
@ -664,6 +668,7 @@ enum ieee80211_if_conf_change {
struct ieee80211_if_conf {
u32 changed;
const u8 *bssid;
bool enable_beacon;
};
/**

5
net/mac80211/cfg.c
View file

@ -523,7 +523,8 @@ static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
kfree(old);
return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
IEEE80211_IFCC_BEACON_ENABLED);
}
static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
@ -583,7 +584,7 @@ static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
synchronize_rcu();
kfree(old);
return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON_ENABLED);
}
/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */

42
net/mac80211/main.c
View file

@ -168,7 +168,6 @@ int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
return 0;
memset(&conf, 0, sizeof(conf));
conf.changed = changed;
if (sdata->vif.type == NL80211_IFTYPE_STATION ||
sdata->vif.type == NL80211_IFTYPE_ADHOC)
@ -183,9 +182,50 @@ int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
return -EINVAL;
}
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
break;
default:
/* do not warn to simplify caller in scan.c */
changed &= ~IEEE80211_IFCC_BEACON_ENABLED;
if (WARN_ON(changed & IEEE80211_IFCC_BEACON))
return -EINVAL;
changed &= ~IEEE80211_IFCC_BEACON;
break;
}
if (changed & IEEE80211_IFCC_BEACON_ENABLED) {
if (local->sw_scanning) {
conf.enable_beacon = false;
} else {
/*
* Beacon should be enabled, but AP mode must
* check whether there is a beacon configured.
*/
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP:
conf.enable_beacon =
!!rcu_dereference(sdata->u.ap.beacon);
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
conf.enable_beacon = true;
break;
default:
/* not reached */
WARN_ON(1);
break;
}
}
}
if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
return -EINVAL;
conf.changed = changed;
return local->ops->config_interface(local_to_hw(local),
&sdata->vif, &conf);
}

3
net/mac80211/mesh.c
View file

@ -442,7 +442,8 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
ifmsh->housekeeping = true;
queue_work(local->hw.workqueue, &ifmsh->work);
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
IEEE80211_IFCC_BEACON_ENABLED);
}
void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)

3
net/mac80211/mlme.c
View file

@ -1599,7 +1599,8 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
ifsta->probe_resp = skb;
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
IEEE80211_IFCC_BEACON_ENABLED);
rates = 0;

18
net/mac80211/scan.c
View file

@ -20,6 +20,7 @@
#include <linux/wireless.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <net/mac80211.h>
#include <net/iw_handler.h>
@ -472,8 +473,8 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw)
netif_addr_unlock(local->mdev);
netif_tx_unlock_bh(local->mdev);
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
/* Tell AP we're back */
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) {
@ -482,8 +483,10 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw)
}
} else
netif_tx_wake_all_queues(sdata->dev);
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON_ENABLED);
}
rcu_read_unlock();
mutex_unlock(&local->iflist_mtx);
done:
ieee80211_mlme_notify_scan_completed(local);
@ -491,7 +494,6 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw)
}
EXPORT_SYMBOL(ieee80211_scan_completed);
void ieee80211_scan_work(struct work_struct *work)
{
struct ieee80211_local *local =
@ -633,8 +635,10 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
local->sw_scanning = true;
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON_ENABLED);
if (sdata->vif.type == NL80211_IFTYPE_STATION) {
if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) {
netif_tx_stop_all_queues(sdata->dev);
@ -643,7 +647,7 @@ int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
} else
netif_tx_stop_all_queues(sdata->dev);
}
rcu_read_unlock();
mutex_unlock(&local->iflist_mtx);
if (ssid) {
local->scan_ssid_len = ssid_len;