mac80211: expose TDLS-initiator value to low level driver

Some drivers need to know which station is the TDLS link initiator.
Expose this value via the mac80211 ieee80211_sta structure.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h

@@ -1427,6 +1427,8 @@ struct ieee80211_sta_rates {
  * @smps_mode: current SMPS mode (off, static or dynamic)
  * @rates: rate control selection table
  * @tdls: indicates whether the STA is a TDLS peer
+ * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only
+ *	valid if the STA is a TDLS peer in the first place.
  */
 struct ieee80211_sta {
 	u32 supp_rates[IEEE80211_NUM_BANDS];
@@ -1442,6 +1444,7 @@ struct ieee80211_sta {
 	enum ieee80211_smps_mode smps_mode;
 	struct ieee80211_sta_rates __rcu *rates;
 	bool tdls;
+	bool tdls_initiator;
 
 	/* must be last */
 	u8 drv_priv[0] __aligned(sizeof(void *));

net/mac80211/tdls.c

@@ -562,8 +562,10 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 	/* infer the initiator if we can, to support old userspace */
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
-		if (sta)
+		if (sta) {
 			set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
+			sta->sta.tdls_initiator = false;
+		}
 		/* fall-through */
 	case WLAN_TDLS_SETUP_CONFIRM:
 	case WLAN_TDLS_DISCOVERY_REQUEST:
@@ -575,8 +577,10 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 		 * Make the last packet sent take effect for the initiator
 		 * value.
 		 */
-		if (sta)
+		if (sta) {
 			clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
+			sta->sta.tdls_initiator = true;
+		}
 		/* fall-through */
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		initiator = false;