mac80211: add option for setting control flags

Allows setting of control flags of skb cb - if needed -
when calling ieee80211_subif_start_xmit().
Tested-by: Pradeep Kumar Chitrapu <pradeepc@codeaurora.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -1761,7 +1761,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 				       struct net_device *dev);
 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
 				  struct net_device *dev,
-				  u32 info_flags);
+				  u32 info_flags,
+				  u32 ctrl_flags);
 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
 			      struct sk_buff_head *skbs);
 struct sk_buff *

net/mac80211/tdls.c

@@ -1056,7 +1056,7 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 
 	/* disable bottom halves when entering the Tx path */
 	local_bh_disable();
-	__ieee80211_subif_start_xmit(skb, dev, flags);
+	__ieee80211_subif_start_xmit(skb, dev, flags, 0);
 	local_bh_enable();
 
 	return ret;

net/mac80211/tx.c

@@ -2432,6 +2432,7 @@ static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
  * @sdata: virtual interface to build the header for
  * @skb: the skb to build the header in
  * @info_flags: skb flags to set
+ * @ctrl_flags: info control flags to set
  *
  * This function takes the skb with 802.3 header and reformats the header to
  * the appropriate IEEE 802.11 header based on which interface the packet is
@@ -2447,7 +2448,7 @@ static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
  */
 static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
 					   struct sk_buff *skb, u32 info_flags,
-					   struct sta_info *sta)
+					   struct sta_info *sta, u32 ctrl_flags)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_tx_info *info;
@@ -2824,6 +2825,7 @@ static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
 	info->flags = info_flags;
 	info->ack_frame_id = info_id;
 	info->band = band;
+	info->control.flags = ctrl_flags;
 
 	return skb;
  free:
@@ -3804,7 +3806,8 @@ EXPORT_SYMBOL(ieee80211_txq_schedule_end);
 
 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
 				  struct net_device *dev,
-				  u32 info_flags)
+				  u32 info_flags,
+				  u32 ctrl_flags)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_local *local = sdata->local;
@@ -3878,7 +3881,8 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
 		skb->prev = NULL;
 		skb->next = NULL;
 
-		skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
+		skb = ieee80211_build_hdr(sdata, skb, info_flags,
+					  sta, ctrl_flags);
 		if (IS_ERR(skb))
 			goto out;
 
@@ -4018,9 +4022,9 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		__skb_queue_head_init(&queue);
 		ieee80211_convert_to_unicast(skb, dev, &queue);
 		while ((skb = __skb_dequeue(&queue)))
-			__ieee80211_subif_start_xmit(skb, dev, 0);
+			__ieee80211_subif_start_xmit(skb, dev, 0, 0);
 	} else {
-		__ieee80211_subif_start_xmit(skb, dev, 0);
+		__ieee80211_subif_start_xmit(skb, dev, 0, 0);
 	}
 
 	return NETDEV_TX_OK;
@@ -4045,7 +4049,7 @@ ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
 		goto out;
 	}
 
-	skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
+	skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0);
 	if (IS_ERR(skb))
 		goto out;
 
@@ -5082,7 +5086,7 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
 	skb_reset_mac_header(skb);
 
 	local_bh_disable();
-	__ieee80211_subif_start_xmit(skb, skb->dev, flags);
+	__ieee80211_subif_start_xmit(skb, skb->dev, flags, 0);
 	local_bh_enable();
 
 	return 0;