iorw.c

虚拟Scsi Disk源程序 版权归原作者

// iorw.c
//
// Generated by C DriverWizard 3.2.0 (Build 2485)
// Requires DDK Only
// File created on 5/18/2005
//

#include "pch.h"
#include "..\intrface.h"
#ifdef VSCSIDISK_WMI_TRACE
#include "iorw.tmh"
#endif

///////////////////////////////////////////////////////////////////////////////////////////////////
//  VScsiDiskDeviceIoControlDispatch
//      Handled incoming IOCTL requests
//
//  Arguments:
//      IN  DeviceObject
//              Device object for our device
//
//      IN  Irp
//              The IOCTL IRP to handle
//
//  Return Value:
//      NT status code
//
NTSTATUS VScsiDiskDeviceIoControlDispatch(
    IN  PDEVICE_OBJECT  DeviceObject,
    IN  PIRP            Irp
    )
{
    PIO_STACK_LOCATION              irpStack;
    NTSTATUS                        status;
    PVSCSIDISK_DEVICE_EXTENSION    deviceExtension;
    PVOID                           inputBuffer;
    ULONG                           inputLength;
    PVOID                           outputBuffer;
    ULONG                           outputLength;

    VScsiDiskDebugPrint(DBG_IO, DBG_TRACE, __FUNCTION__"++. IRP %p", Irp);

    // check if request is directed to PDO
    if (VScsiDiskIsPdo(DeviceObject))
    {
        status = VScsiDiskScsiDeviceIoControlDispatch(DeviceObject, Irp);

        return status;
    }

    deviceExtension = (PVSCSIDISK_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

    // Get our IRP stack location
    irpStack = IoGetCurrentIrpStackLocation(Irp);

    // Get the buffer lengths
    inputLength = irpStack->Parameters.DeviceIoControl.InputBufferLength;
    outputLength = irpStack->Parameters.DeviceIoControl.OutputBufferLength;

    switch (irpStack->Parameters.DeviceIoControl.IoControlCode) 
    {
    case 0:

    default:
        status = STATUS_INVALID_DEVICE_REQUEST;
        Irp->IoStatus.Status = status;
        IoCompleteRequest (Irp, IO_NO_INCREMENT);
        break;
    }

    VScsiDiskDebugPrint(DBG_IO, DBG_TRACE, __FUNCTION__"--. IRP %p STATUS %x", Irp, status);

    return status;
}

///////////////////////////////////////////////////////////////////////////////////////////////////
//  VScsiDiskInternalDeviceIoControlDispatch
//      Dispatch routine to handle IRP_MJ_INTERNAL_DEVICE_CONTROL
//
//  Arguments:
//      IN  DeviceObject
//              pointer to our device object
//
//      IN  Irp
//              pointer to the IRP_MJ_INTERNAL_DEVICE_CONTROL IRP
//
//  Return Value:
//      NT status code
//
NTSTATUS VScsiDiskInternalDeviceIoControlDispatch(
    IN  PDEVICE_OBJECT  DeviceObject,
    IN  PIRP            Irp
    )
{
    NTSTATUS                        status;
    PVSCSIDISK_DEVICE_EXTENSION    deviceExtension;

    VScsiDiskDebugPrint(DBG_GENERAL, DBG_TRACE, __FUNCTION__"++. IRP %p", Irp);

    // check if request is directed to PDO
    if (VScsiDiskIsPdo(DeviceObject))
    {
        status = VScsiDiskScsiInternalDeviceIoControlDispatch(DeviceObject, Irp);

        return status;
    }

    deviceExtension = (PVSCSIDISK_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

    if (!VScsiDiskAcquireRemoveLock(deviceExtension))
    {
        status = STATUS_NO_SUCH_DEVICE;

        Irp->IoStatus.Status = status;
        IoCompleteRequest(Irp, IO_NO_INCREMENT);

        VScsiDiskDebugPrint(DBG_GENERAL, DBG_WARN, __FUNCTION__"--. IRP %p STATUS %x", Irp, status);

        return status;
    }

    status = STATUS_NOT_IMPLEMENTED;

    Irp->IoStatus.Status = status;
    Irp->IoStatus.Information = 0;
    IoCompleteRequest (Irp, IO_NO_INCREMENT);

    VScsiDiskReleaseRemoveLock(deviceExtension);

    VScsiDiskDebugPrint(DBG_GENERAL, DBG_TRACE, __FUNCTION__"--. IRP %p STATUS %x", Irp, status);

    return status;
}