mac80211: convert aggregation to operate on vifs/stas

The entire aggregation code currently operates on the
hw pointer and station addresses, but that needs to
change to make stations purely per-vif; As one step
preparing for that make the aggregation code callable
with the station, or by the combination of virtual
interface and station address.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 38 insertions, 58 deletions

diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index b09948ceec4a..6ddd11466df2 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -138,7 +138,8 @@ static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 	*state = HT_AGG_STATE_REQ_STOP_BA_MSK |
 		(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
 
-	ret = drv_ampdu_action(local, IEEE80211_AMPDU_TX_STOP,
+	ret = drv_ampdu_action(local, &sta->sdata->vif,
+			       IEEE80211_AMPDU_TX_STOP,
 			       &sta->sta, tid, NULL);
 
 	/* HW shall not deny going back to legacy */
@@ -196,11 +197,11 @@ static inline int ieee80211_ac_from_tid(int tid)
 	return ieee802_1d_to_ac[tid & 7];
 }
 
-int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
+int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
-	struct sta_info *sta;
-	struct ieee80211_sub_if_data *sdata;
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
 	u8 *state;
 	int ret = 0;
 	u16 start_seq_num;
@@ -208,52 +209,37 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 	if (WARN_ON(!local->ops->ampdu_action))
 		return -EINVAL;
 
-	if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
+	if ((tid >= STA_TID_NUM) ||
+	    !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
 		return -EINVAL;
 
 #ifdef CONFIG_MAC80211_HT_DEBUG
 	printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
-	       ra, tid);
+	       pubsta->addr, tid);
 #endif /* CONFIG_MAC80211_HT_DEBUG */
 
-	rcu_read_lock();
-
-	sta = sta_info_get(local, ra);
-	if (!sta) {
-#ifdef CONFIG_MAC80211_HT_DEBUG
-		printk(KERN_DEBUG "Could not find the station\n");
-#endif
-		ret = -ENOENT;
-		goto unlock;
-	}
-
 	/*
 	 * The aggregation code is not prepared to handle
 	 * anything but STA/AP due to the BSSID handling.
 	 * IBSS could work in the code but isn't supported
 	 * by drivers or the standard.
 	 */
-	if (sta->sdata->vif.type != NL80211_IFTYPE_STATION &&
-	    sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
-	    sta->sdata->vif.type != NL80211_IFTYPE_AP) {
-		ret = -EINVAL;
-		goto unlock;
-	}
+	if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+	    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+	    sdata->vif.type != NL80211_IFTYPE_AP)
+		return -EINVAL;
 
 	if (test_sta_flags(sta, WLAN_STA_SUSPEND)) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
 		printk(KERN_DEBUG "Suspend in progress. "
 		       "Denying BA session request\n");
 #endif
-		ret = -EINVAL;
-		goto unlock;
+		return -EINVAL;
 	}
 
 	spin_lock_bh(&sta->lock);
 	spin_lock(&local->ampdu_lock);
 
-	sdata = sta->sdata;
-
 	/* we have tried too many times, receiver does not want A-MPDU */
 	if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
 		ret = -EBUSY;
@@ -310,8 +296,9 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 
 	start_seq_num = sta->tid_seq[tid];
 
-	ret = drv_ampdu_action(local, IEEE80211_AMPDU_TX_START,
-			       &sta->sta, tid, &start_seq_num);
+	ret = drv_ampdu_action(local, &sdata->vif,
+			       IEEE80211_AMPDU_TX_START,
+			       pubsta, tid, &start_seq_num);
 
 	if (ret) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
@@ -336,7 +323,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 			sta->ampdu_mlme.dialog_token_allocator;
 	sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
 
-	ieee80211_send_addba_request(sta->sdata, ra, tid,
+	ieee80211_send_addba_request(sdata, pubsta->addr, tid,
 			 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
 			 sta->ampdu_mlme.tid_tx[tid]->ssn,
 			 0x40, 5000);
@@ -348,7 +335,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 #ifdef CONFIG_MAC80211_HT_DEBUG
 	printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
 #endif
-	goto unlock;
+	return 0;
 
  err_free:
 	kfree(sta->ampdu_mlme.tid_tx[tid]);
@@ -360,8 +347,6 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
  err_unlock_sta:
 	spin_unlock(&local->ampdu_lock);
 	spin_unlock_bh(&sta->lock);
- unlock:
-	rcu_read_unlock();
 	return ret;
 }
 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
@@ -428,13 +413,15 @@ static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
 	ieee80211_agg_splice_finish(local, sta, tid);
 	spin_unlock(&local->ampdu_lock);
 
-	drv_ampdu_action(local, IEEE80211_AMPDU_TX_OPERATIONAL,
+	drv_ampdu_action(local, &sta->sdata->vif,
+			 IEEE80211_AMPDU_TX_OPERATIONAL,
 			 &sta->sta, tid, NULL);
 }
 
-void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
+void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
 	u8 *state;
 
@@ -483,10 +470,11 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 }
 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
 
-void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
+void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
 				      const u8 *ra, u16 tid)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_ra_tid *ra_tid;
 	struct sk_buff *skb = dev_alloc_skb(0);
 
@@ -535,13 +523,12 @@ int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
 	return ret;
 }
 
-int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
-				 u8 *ra, u16 tid,
+int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
 				 enum ieee80211_back_parties initiator)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
-	struct sta_info *sta;
-	int ret = 0;
+	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct ieee80211_local *local = sdata->local;
 
 	if (WARN_ON(!local->ops->ampdu_action))
 		return -EINVAL;
@@ -549,22 +536,14 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 	if (tid >= STA_TID_NUM)
 		return -EINVAL;
 
-	rcu_read_lock();
-	sta = sta_info_get(local, ra);
-	if (!sta) {
-		rcu_read_unlock();
-		return -ENOENT;
-	}
-
-	ret = __ieee80211_stop_tx_ba_session(sta, tid, initiator);
-	rcu_read_unlock();
-	return ret;
+	return __ieee80211_stop_tx_ba_session(sta, tid, initiator);
 }
 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 
-void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
+void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
 	u8 *state;
 
@@ -627,10 +606,11 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
 }
 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
 
-void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
+void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
 				     const u8 *ra, u16 tid)
 {
-	struct ieee80211_local *local = hw_to_local(hw);
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_ra_tid *ra_tid;
 	struct sk_buff *skb = dev_alloc_skb(0);