src/java.base/unix/classes/sun/nio/fs/UnixFileStore.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -124,10 +124,16 @@
        UnixFileStoreAttributes attrs = readAttributes();
        return attrs.blockSize() * attrs.availableBlocks();
     }
 
     @Override
+    public long getBlockSize() throws IOException {
+       UnixFileStoreAttributes attrs = readAttributes();
+       return attrs.blockSize();
+    }
+
+    @Override
     public long getUnallocatedSpace() throws IOException {
         UnixFileStoreAttributes attrs = readAttributes();
         return attrs.blockSize() * attrs.freeBlocks();
     }