protected static final int ATTR_GET_MASK = 0x7FFF;
    protected static final int ATTR_SET_MASK = 0x30A7;
    protected static final int DEFAULT_ATTR_EXPIRATION_PERIOD = 5000;

    protected static final int HASH_DOT = ".".hashCode();
    protected static final int HASH_DOT_DOT = "..".hashCode();

    private static Logger log = LoggerFactory.getLogger(SmbFile.class);