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Implemented IRP_MJ_QUERY_VOLUME_INFORMATION/FileFsDeviceInformation. Msvcrt needs to detect the device type.
svn path=/trunk/; revision=17292
This commit is contained in:
Hartmut Birr
parent
77b9c0a70d
commit
2acde8450d
1 changed files with 137 additions and 114 deletions
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@ -26,90 +26,119 @@ static const NULL_EXTENSION nxZero = NullZeroStream;
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NTSTATUS STDCALL
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NullDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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PIO_STACK_LOCATION piosStack = IoGetCurrentIrpStackLocation(Irp);
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NTSTATUS nErrCode;
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PIO_STACK_LOCATION piosStack = IoGetCurrentIrpStackLocation(Irp);
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NTSTATUS nErrCode;
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nErrCode = STATUS_SUCCESS;
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Irp->IoStatus.Information = 0;
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nErrCode = STATUS_SUCCESS;
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Irp->IoStatus.Information = 0;
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switch(piosStack->MajorFunction)
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{
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/* opening and closing handles to the device */
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case IRP_MJ_CREATE:
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case IRP_MJ_CLOSE:
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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case NullZeroStream:
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break;
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switch(piosStack->MajorFunction)
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{
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/* opening and closing handles to the device */
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case IRP_MJ_CREATE:
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case IRP_MJ_CLOSE:
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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case NullZeroStream:
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break;
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default:
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ASSERT(FALSE);
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}
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default:
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ASSERT(FALSE);
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}
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break;
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break;
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/* write data */
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case IRP_MJ_WRITE:
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{
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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Irp->IoStatus.Information = piosStack->Parameters.Write.Length;
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break;
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/* write data */
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case IRP_MJ_WRITE:
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{
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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Irp->IoStatus.Information = piosStack->Parameters.Write.Length;
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break;
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case NullZeroStream:
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nErrCode = STATUS_INVALID_DEVICE_REQUEST;
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break;
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case NullZeroStream:
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nErrCode = STATUS_INVALID_DEVICE_REQUEST;
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break;
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default:
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ASSERT(FALSE);
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}
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default:
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ASSERT(FALSE);
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}
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break;
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}
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break;
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}
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/* read data */
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case IRP_MJ_READ:
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{
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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nErrCode = STATUS_END_OF_FILE;
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break;
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/* read data */
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case IRP_MJ_READ:
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{
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switch(NULL_DEVICE_TYPE(DeviceObject))
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{
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case NullBitBucket:
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nErrCode = STATUS_END_OF_FILE;
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break;
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case NullZeroStream:
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_SEH_TRY
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{
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RtlZeroMemory(Irp->AssociatedIrp.SystemBuffer, piosStack->Parameters.Read.Length);
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Irp->IoStatus.Information = piosStack->Parameters.Read.Length;
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}
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_SEH_HANDLE
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{
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nErrCode = _SEH_GetExceptionCode();
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}
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_SEH_END;
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case NullZeroStream:
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_SEH_TRY
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{
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RtlZeroMemory(Irp->AssociatedIrp.SystemBuffer, piosStack->Parameters.Read.Length);
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Irp->IoStatus.Information = piosStack->Parameters.Read.Length;
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}
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_SEH_HANDLE
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{
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nErrCode = _SEH_GetExceptionCode();
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}
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_SEH_END;
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break;
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break;
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default:
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ASSERT(FALSE);
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default:
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ASSERT(FALSE);
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}
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}
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break;
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}
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break;
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}
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default:
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Irp->IoStatus.Information = 0;
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nErrCode = STATUS_NOT_IMPLEMENTED;
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case IRP_MJ_QUERY_VOLUME_INFORMATION:
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switch(piosStack->Parameters.QueryVolume.FsInformationClass)
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{
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case FileFsDeviceInformation:
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{
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ULONG BufferLength = piosStack->Parameters.QueryVolume.Length;
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PFILE_FS_DEVICE_INFORMATION FsDeviceInfo = (PFILE_FS_DEVICE_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
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}
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if (BufferLength >= sizeof(FILE_FS_DEVICE_INFORMATION))
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{
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FsDeviceInfo->DeviceType = FILE_DEVICE_NULL;
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FsDeviceInfo->Characteristics = 0; /* FIXME: fix this !! */
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Irp->IoStatus.Information = sizeof(FILE_FS_DEVICE_INFORMATION);
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nErrCode = STATUS_SUCCESS;
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}
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else
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{
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Irp->IoStatus.Information = 0;
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nErrCode = STATUS_BUFFER_OVERFLOW;
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}
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}
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break;
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Irp->IoStatus.Status = nErrCode;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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default:
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Irp->IoStatus.Information = 0;
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nErrCode = STATUS_NOT_IMPLEMENTED;
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}
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break;
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return (nErrCode);
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default:
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Irp->IoStatus.Information = 0;
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nErrCode = STATUS_NOT_IMPLEMENTED;
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}
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Irp->IoStatus.Status = nErrCode;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return (nErrCode);
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}
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VOID STDCALL
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@ -121,62 +150,56 @@ NullUnload(PDRIVER_OBJECT DriverObject)
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NTSTATUS STDCALL
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DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
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{
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PDEVICE_OBJECT pdoNullDevice;
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PDEVICE_OBJECT pdoZeroDevice;
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UNICODE_STRING wstrNullDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Null");
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UNICODE_STRING wstrZeroDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Zero");
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NTSTATUS nErrCode;
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PDEVICE_OBJECT pdoNullDevice;
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PDEVICE_OBJECT pdoZeroDevice;
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UNICODE_STRING wstrNullDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Null");
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UNICODE_STRING wstrZeroDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Zero");
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NTSTATUS nErrCode;
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/* register driver routines */
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_CREATE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_READ] = NullDispatch;
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DriverObject->DriverUnload = NullUnload;
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/* register driver routines */
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_CREATE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = NullDispatch;
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DriverObject->MajorFunction[IRP_MJ_READ] = NullDispatch;
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DriverObject->DriverUnload = NullUnload;
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/* create null device */
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nErrCode = IoCreateDevice
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(
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DriverObject,
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sizeof(NULL_EXTENSION),
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&wstrNullDeviceName,
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FILE_DEVICE_NULL,
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0,
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FALSE,
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&pdoNullDevice
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);
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/* create null device */
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nErrCode = IoCreateDevice(DriverObject,
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sizeof(NULL_EXTENSION),
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&wstrNullDeviceName,
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FILE_DEVICE_NULL,
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0,
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FALSE,
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&pdoNullDevice);
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/* failure */
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if(!NT_SUCCESS(nErrCode))
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{
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return (nErrCode);
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}
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/* failure */
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if(!NT_SUCCESS(nErrCode))
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{
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return (nErrCode);
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}
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pdoNullDevice->DeviceExtension = (PVOID)&nxNull;
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pdoNullDevice->DeviceExtension = (PVOID)&nxNull;
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/* create zero device */
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nErrCode = IoCreateDevice
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(
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DriverObject,
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sizeof(NULL_EXTENSION),
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&wstrZeroDeviceName,
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FILE_DEVICE_NULL,
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FILE_READ_ONLY_DEVICE, /* zero device is read-only */
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FALSE,
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&pdoZeroDevice
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);
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/* create zero device */
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nErrCode = IoCreateDevice(DriverObject,
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sizeof(NULL_EXTENSION),
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&wstrZeroDeviceName,
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FILE_DEVICE_NULL,
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FILE_READ_ONLY_DEVICE, /* zero device is read-only */
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FALSE,
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&pdoZeroDevice);
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/* failure */
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if(!NT_SUCCESS(nErrCode))
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{
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IoDeleteDevice(pdoNullDevice);
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return (nErrCode);
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}
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/* failure */
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if(!NT_SUCCESS(nErrCode))
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{
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IoDeleteDevice(pdoNullDevice);
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return (nErrCode);
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}
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pdoZeroDevice->DeviceExtension = (PVOID)&nxZero;
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pdoZeroDevice->Flags |= DO_BUFFERED_IO;
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pdoZeroDevice->DeviceExtension = (PVOID)&nxZero;
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pdoZeroDevice->Flags |= DO_BUFFERED_IO;
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return (nErrCode);
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return (nErrCode);
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}
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/* EOF */
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