mac80211: Add debugfs callbacks for station addition/removal

Provide drivers with hooks to create debugfs files when
a new station is added. This would help drivers to take
advantage of mac80211's station list infrastructure and not maintain
tedious station management code internally.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
[ifdef inline wrapper functions]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index d11037b..e1293c7 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2208,6 +2208,14 @@
  * @sta_remove: Notifies low level driver about removal of an associated
  *	station, AP, IBSS/WDS/mesh peer etc. This callback can sleep.
  *
+ * @sta_add_debugfs: Drivers can use this callback to add debugfs files
+ *	when a station is added to mac80211's station list. This callback
+ *	and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS
+ *	conditional. This callback can sleep.
+ *
+ * @sta_remove_debugfs: Remove the debugfs files which were added using
+ *	@sta_add_debugfs. This callback can sleep.
+ *
  * @sta_notify: Notifies low level driver about power state transition of an
  *	associated station, AP,  IBSS/WDS/mesh peer etc. For a VIF operating
  *	in AP mode, this callback will not be called when the flag
@@ -2489,6 +2497,16 @@
 		       struct ieee80211_sta *sta);
 	int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			  struct ieee80211_sta *sta);
+#ifdef CONFIG_MAC80211_DEBUGFS
+	void (*sta_add_debugfs)(struct ieee80211_hw *hw,
+				struct ieee80211_vif *vif,
+				struct ieee80211_sta *sta,
+				struct dentry *dir);
+	void (*sta_remove_debugfs)(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif,
+				   struct ieee80211_sta *sta,
+				   struct dentry *dir);
+#endif
 	void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			enum sta_notify_cmd, struct ieee80211_sta *sta);
 	int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,