utils.c File Reference

#include "partmgr.h"

Include dependency graph for utils.c:

Go to the source code of this file.

Functions
NTSTATUS NTAPI	ForwardIrpAndForget (_In_ PDEVICE_OBJECT DeviceObject, _In_ PIRP Irp)
NTSTATUS	IssueSyncIoControlRequest (_In_ UINT32 IoControlCode, _In_ PDEVICE_OBJECT DeviceObject, _In_ PVOID InputBuffer, _In_ ULONG InputBufferLength, _In_ PVOID OutputBuffer, _In_ ULONG OutputBufferLength, _In_ BOOLEAN InternalDeviceIoControl)

Function Documentation

ForwardIrpAndForget()

NTSTATUS NTAPI ForwardIrpAndForget	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_In_ PIRP	Irp
	)

Definition at line 5 of file utils.c.

{
    // this part of a structure is identical in both FDO and PDO
    PDEVICE_OBJECT LowerDevice = ((PFDO_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
 
    ASSERT(LowerDevice);
 
    IoSkipCurrentIrpStackLocation(Irp);
    return IoCallDriver(LowerDevice, Irp);
}

IssueSyncIoControlRequest()

NTSTATUS IssueSyncIoControlRequest	(	_In_ UINT32	IoControlCode,
		_In_ PDEVICE_OBJECT	DeviceObject,
		_In_ PVOID	InputBuffer,
		_In_ ULONG	InputBufferLength,
		_In_ PVOID	OutputBuffer,
		_In_ ULONG	OutputBufferLength,
		_In_ BOOLEAN	InternalDeviceIoControl
	)

Definition at line 19 of file utils.c.

{
    PIRP Irp;
    IO_STATUS_BLOCK IoStatusBlock;
    PKEVENT Event;
    NTSTATUS Status;
    PAGED_CODE();
 
    /* Allocate a non-paged event */
    Event = ExAllocatePoolWithTag(NonPagedPool, sizeof(*Event), TAG_PARTMGR);
    if (!Event)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    /* Initialize it */
    KeInitializeEvent(Event, NotificationEvent, FALSE);
 
    /* Build the IRP */
    Irp = IoBuildDeviceIoControlRequest(IoControlCode,
                                        DeviceObject,
                                        InputBuffer,
                                        InputBufferLength,
                                        OutputBuffer,
                                        OutputBufferLength,
                                        InternalDeviceIoControl,
                                        Event,
                                        &IoStatusBlock);
    if (!Irp)
    {
        /* Fail, free the event */
        ExFreePoolWithTag(Event, TAG_PARTMGR);
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    /* Call the driver and check if it's pending */
    Status = IoCallDriver(DeviceObject, Irp);
    if (Status == STATUS_PENDING)
    {
        /* Wait on the driver */
        KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
        Status = IoStatusBlock.Status;
    }
 
    /* Free the event and return the Status */
    ExFreePoolWithTag(Event, TAG_PARTMGR);
    return Status;
}

Referenced by FdoHandleStartDevice(), FdoIoctlDiskGetDriveGeometryEx(), PartMgrRefreshDiskData(), and VolumeDeleteMountPoints().