Получение пути монтирования по FILE_OBJECT

// fileObject входной PFILE_OBJECT
 
PDEVICE_OBJECT deviceObject;
KEVENT kEvent;
PIRP irp;
IO_STATUS_BLOCK ioStatusBlock;
PIO_STACK_LOCATION ioStackLocation;
NTSTATUS ntStanus;
PDEVICE_RELATIONS deviceRelations;
PDEVICE_OBJECT physicalDeviceObject;
 
if (!(deviceObject = IoGetRelatedDeviceObject(fileObject)))
{
    DbgPrint("IoGetRelatedDeviceObject failed");
 
    return false;
}
else
    DbgPrint("IoGetRelatedDeviceObject ok");
 
KeInitializeEvent(&kEvent, NotificationEvent, FALSE);
 
if (!(irp = IoBuildSynchronousFsdRequest(IRP_MJ_PNP, deviceObject, 
    NULL, 0, NULL, &kEvent, &ioStatusBlock)))
{
    DbgPrint("IoBuildSynchronousFsdRequest failed");
 
    return false;
}
else
    DbgPrint("IoBuildSynchronousFsdRequest ok");
    
ioStackLocation = IoGetNextIrpStackLocation(irp);
ioStackLocation->MajorFunction = IRP_MN_QUERY_DEVICE_RELATIONS;
ioStackLocation->Parameters.QueryDeviceRelations.Type 
    = BusRelations;
 
irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
 
ntStanus = IoCallDriver(deviceObject, irp);
 
if (ntStanus == STATUS_PENDING)
{
    KeWaitForSingleObject(&kEvent, Executive, KernelMode, FALSE, 
        NULL);
    ntStanus = ioStatusBlock.Status;
}
 
if (NT_SUCCESS(ntStanus))
{
    deviceRelations = (PDEVICE_RELATIONS)ioStatusBlock.Information;
 
    physicalDeviceObject = deviceRelations->Objects[0];
    ExFreePool(deviceRelations);
    
    DbgPrint("TEST PDO ok");
}
else
{
    DbgPrint("TEST PDO failed %X", ntStanus);
    return false;
}