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mac80211: make ieee80211_find_sta per virtual interface

Browse source 
Since we have a TODO item to make all station
management dependent on virtual interfaces, I
figured I'd start with pushing such a change
to drivers before more drivers start using the
ieee80211_find_sta() API with a hw pointer and
cause us grief later on.

For now continue exporting the old API in form
of ieee80211_find_sta_by_hw(), but discourage
its use strongly.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-11-04 14:42:28 +01:00 committed by John W. Linville
parent 7fdad987d6
commit 5ed176e1c4
7 changed files with 47 additions and 9 deletions
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3
drivers/net/wireless/ath/ath9k/recv.c
View file

@ -202,7 +202,8 @@ static int ath_rx_prepare(struct sk_buff *skb, struct ath_desc *ds,
}
rcu_read_lock();
sta = ieee80211_find_sta(sc->hw, hdr->addr2);
/* XXX: use ieee80211_find_sta! */
sta = ieee80211_find_sta_by_hw(sc->hw, hdr->addr2);
if (sta) {
an = (struct ath_node *) sta->drv_priv;
if (ds->ds_rxstat.rs_rssi != ATH9K_RSSI_BAD &&

3
drivers/net/wireless/ath/ath9k/xmit.c
View file

@ -282,7 +282,8 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
rcu_read_lock();
sta = ieee80211_find_sta(sc->hw, hdr->addr1);
/* XXX: use ieee80211_find_sta! */
sta = ieee80211_find_sta_by_hw(sc->hw, hdr->addr1);
if (!sta) {
rcu_read_unlock();
return;

3
drivers/net/wireless/iwlwifi/iwl-3945-rs.c
View file

@ -913,7 +913,8 @@ void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
rcu_read_lock();
sta = ieee80211_find_sta(hw, priv->stations[sta_id].sta.sta.addr);
sta = ieee80211_find_sta(priv->vif,
priv->stations[sta_id].sta.sta.addr);
if (!sta) {
rcu_read_unlock();
return;

2
drivers/net/wireless/iwlwifi/iwl-core.c
View file

@ -2300,7 +2300,7 @@ static void iwl_ht_conf(struct iwl_priv *priv,
switch (priv->iw_mode) {
case NL80211_IFTYPE_STATION:
rcu_read_lock();
sta = ieee80211_find_sta(priv->hw, priv->bssid);
sta = ieee80211_find_sta(priv->vif, priv->bssid);
if (sta) {
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
int maxstreams;

2
drivers/net/wireless/iwlwifi/iwl-sta.c
View file

@ -1017,7 +1017,7 @@ int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
*/
if (priv->current_ht_config.is_ht) {
rcu_read_lock();
sta = ieee80211_find_sta(priv->hw, addr);
sta = ieee80211_find_sta(priv->vif, addr);
if (sta) {
memcpy(&ht_config, &sta->ht_cap, sizeof(ht_config));
cur_ht_config = &ht_config;

25
include/net/mac80211.h
View file

@ -2106,15 +2106,36 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
/**
* ieee80211_find_sta - find a station
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @vif: virtual interface to look for station on
* @addr: station's address
*
* This function must be called under RCU lock and the
* resulting pointer is only valid under RCU lock as well.
*/
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
const u8 *addr);
/**
* ieee80211_find_sta_by_hw - find a station on hardware
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @addr: station's address
*
* This function must be called under RCU lock and the
* resulting pointer is only valid under RCU lock as well.
*
* NOTE: This function should not be used! When mac80211 is converted
* internally to properly keep track of stations on multiple
* virtual interfaces, it will not always know which station to
* return here since a single address might be used by multiple
* logical stations (e.g. consider a station connecting to another
* BSSID on the same AP hardware without disconnecting first).
*
* DO NOT USE THIS FUNCTION.
*/
struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw,
const u8 *addr);
/**
* ieee80211_beacon_loss - inform hardware does not receive beacons
*

18
net/mac80211/sta_info.c
View file

@ -801,8 +801,8 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
sta_info_destroy(sta);
}
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
const u8 *addr)
struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw,
const u8 *addr)
{
struct sta_info *sta = sta_info_get(hw_to_local(hw), addr);
@ -810,4 +810,18 @@ struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
return NULL;
return &sta->sta;
}
EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_hw);
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
const u8 *addr)
{
struct ieee80211_sub_if_data *sdata;
if (!vif)
return NULL;
sdata = vif_to_sdata(vif);
return ieee80211_find_sta_by_hw(&sdata->local->hw, addr);
}
EXPORT_SYMBOL(ieee80211_find_sta);