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74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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#include "partmgr.h"
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NTSTATUS
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NTAPI
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ForwardIrpAndForget(
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_In_ PDEVICE_OBJECT DeviceObject,
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_In_ PIRP Irp)
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{
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// this part of a structure is identical in both FDO and PDO
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PDEVICE_OBJECT LowerDevice = ((PFDO_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
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ASSERT(LowerDevice);
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(LowerDevice, Irp);
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}
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NTSTATUS
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IssueSyncIoControlRequest(
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_In_ UINT32 IoControlCode,
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_In_ PDEVICE_OBJECT DeviceObject,
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_In_ PVOID InputBuffer,
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_In_ ULONG InputBufferLength,
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_In_ PVOID OutputBuffer,
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_In_ ULONG OutputBufferLength,
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_In_ BOOLEAN InternalDeviceIoControl)
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{
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PIRP Irp;
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IO_STATUS_BLOCK IoStatusBlock;
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PKEVENT Event;
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NTSTATUS Status;
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PAGED_CODE();
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/* Allocate a non-paged event */
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Event = ExAllocatePoolWithTag(NonPagedPool, sizeof(*Event), TAG_PARTMGR);
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if (!Event)
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{
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* Initialize it */
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KeInitializeEvent(Event, NotificationEvent, FALSE);
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/* Build the IRP */
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Irp = IoBuildDeviceIoControlRequest(IoControlCode,
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DeviceObject,
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InputBuffer,
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InputBufferLength,
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OutputBuffer,
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OutputBufferLength,
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InternalDeviceIoControl,
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Event,
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&IoStatusBlock);
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if (!Irp)
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{
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/* Fail, free the event */
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ExFreePoolWithTag(Event, TAG_PARTMGR);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* Call the driver and check if it's pending */
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Status = IoCallDriver(DeviceObject, Irp);
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if (Status == STATUS_PENDING)
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{
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/* Wait on the driver */
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KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
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Status = IoStatusBlock.Status;
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}
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/* Free the event and return the Status */
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ExFreePoolWithTag(Event, TAG_PARTMGR);
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return Status;
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}
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