FIO_FILE_UNLINK = 1 << 1, /* unlink on close */
FIO_FILE_CLOSING = 1 << 2, /* file being closed */
FIO_FILE_EXISTS = 1 << 3, /* no need to create */
FIO_FILE_UNLINK = 1 << 1, /* unlink on close */
FIO_FILE_CLOSING = 1 << 2, /* file being closed */
FIO_FILE_EXISTS = 1 << 3, /* no need to create */