diff --git a/services/java/com/android/server/MountService.java b/services/java/com/android/server/MountService.java
index 461a21e..a91b6906 100644
--- a/services/java/com/android/server/MountService.java
+++ b/services/java/com/android/server/MountService.java
@@ -64,6 +64,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.Set;
 
 import javax.crypto.SecretKey;
 import javax.crypto.SecretKeyFactory;
@@ -1730,6 +1731,18 @@
         }
     }
 
+    public String[] getVolumeList() {
+        synchronized(mVolumeStates) {
+            Set<String> volumes = mVolumeStates.keySet();
+            String[] result = new String[volumes.size()];
+            int i = 0;
+            for (String volume : volumes) {
+                result[i++] = volume;
+            }
+            return result;
+        }
+    }
+
     private void addObbStateLocked(ObbState obbState) throws RemoteException {
         final IBinder binder = obbState.getBinder();
         List<ObbState> obbStates = mObbMounts.get(binder);