--- trunk/reactos/drivers/dd/null/null.c 2005-08-11 19:02:31 UTC (rev 17291)
+++ trunk/reactos/drivers/dd/null/null.c 2005-08-11 19:07:11 UTC (rev 17292)
@@ -26,90 +26,119 @@
NTSTATUS STDCALL
NullDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
- PIO_STACK_LOCATION piosStack = IoGetCurrentIrpStackLocation(Irp);
- NTSTATUS nErrCode;
+ PIO_STACK_LOCATION piosStack = IoGetCurrentIrpStackLocation(Irp);
+ NTSTATUS nErrCode;
- nErrCode = STATUS_SUCCESS;
- Irp->IoStatus.Information = 0;
+ nErrCode = STATUS_SUCCESS;
+ Irp->IoStatus.Information = 0;
- switch(piosStack->MajorFunction)
- {
- /* opening and closing handles to the device */
- case IRP_MJ_CREATE:
- case IRP_MJ_CLOSE:
- switch(NULL_DEVICE_TYPE(DeviceObject))
- {
- case NullBitBucket:
- case NullZeroStream:
- break;
+ switch(piosStack->MajorFunction)
+ {
+ /* opening and closing handles to the device */
+ case IRP_MJ_CREATE:
+ case IRP_MJ_CLOSE:
+ switch(NULL_DEVICE_TYPE(DeviceObject))
+ {
+ case NullBitBucket:
+ case NullZeroStream:
+ break;
- default:
- ASSERT(FALSE);
- }
+ default:
+ ASSERT(FALSE);
+ }
- break;
+ break;
- /* write data */
- case IRP_MJ_WRITE:
- {
- switch(NULL_DEVICE_TYPE(DeviceObject))
- {
- case NullBitBucket:
- Irp->IoStatus.Information = piosStack->Parameters.Write.Length;
- break;
+ /* write data */
+ case IRP_MJ_WRITE:
+ {
+ switch(NULL_DEVICE_TYPE(DeviceObject))
+ {
+ case NullBitBucket:
+ Irp->IoStatus.Information = piosStack->Parameters.Write.Length;
+ break;
- case NullZeroStream:
- nErrCode = STATUS_INVALID_DEVICE_REQUEST;
- break;
+ case NullZeroStream:
+ nErrCode = STATUS_INVALID_DEVICE_REQUEST;
+ break;
- default:
- ASSERT(FALSE);
- }
+ default:
+ ASSERT(FALSE);
+ }
- break;
- }
+ break;
+ }
- /* read data */
- case IRP_MJ_READ:
- {
- switch(NULL_DEVICE_TYPE(DeviceObject))
- {
- case NullBitBucket:
- nErrCode = STATUS_END_OF_FILE;
- break;
+ /* read data */
+ case IRP_MJ_READ:
+ {
+ switch(NULL_DEVICE_TYPE(DeviceObject))
+ {
+ case NullBitBucket:
+ nErrCode = STATUS_END_OF_FILE;
+ break;
- case NullZeroStream:
- _SEH_TRY
- {
- RtlZeroMemory(Irp->AssociatedIrp.SystemBuffer, piosStack->Parameters.Read.Length);
- Irp->IoStatus.Information = piosStack->Parameters.Read.Length;
- }
- _SEH_HANDLE
- {
- nErrCode = _SEH_GetExceptionCode();
- }
- _SEH_END;
+ case NullZeroStream:
+ _SEH_TRY
+ {
+ RtlZeroMemory(Irp->AssociatedIrp.SystemBuffer, piosStack->Parameters.Read.Length);
+ Irp->IoStatus.Information = piosStack->Parameters.Read.Length;
+ }
+ _SEH_HANDLE
+ {
+ nErrCode = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
- break;
+ break;
- default:
- ASSERT(FALSE);
+ default:
+ ASSERT(FALSE);
- }
+ }
- break;
- }
+ break;
+ }
- default:
- Irp->IoStatus.Information = 0;
- nErrCode = STATUS_NOT_IMPLEMENTED;
+ case IRP_MJ_QUERY_VOLUME_INFORMATION:
+ switch(piosStack->Parameters.QueryVolume.FsInformationClass)
+ {
+ case FileFsDeviceInformation:
+ {
+ ULONG BufferLength = piosStack->Parameters.QueryVolume.Length;
+ PFILE_FS_DEVICE_INFORMATION FsDeviceInfo = (PFILE_FS_DEVICE_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
- }
+ if (BufferLength >= sizeof(FILE_FS_DEVICE_INFORMATION))
+ {
+ FsDeviceInfo->DeviceType = FILE_DEVICE_NULL;
+ FsDeviceInfo->Characteristics = 0; /* FIXME: fix this !! */
+ Irp->IoStatus.Information = sizeof(FILE_FS_DEVICE_INFORMATION);
+ nErrCode = STATUS_SUCCESS;
+ }
+ else
+ {
+ Irp->IoStatus.Information = 0;
+ nErrCode = STATUS_BUFFER_OVERFLOW;
+ }
+ }
+ break;
- Irp->IoStatus.Status = nErrCode;
- IoCompleteRequest(Irp, IO_NO_INCREMENT);
+ default:
+ Irp->IoStatus.Information = 0;
+ nErrCode = STATUS_NOT_IMPLEMENTED;
+ }
+ break;
- return (nErrCode);
+ default:
+ Irp->IoStatus.Information = 0;
+ nErrCode = STATUS_NOT_IMPLEMENTED;
+
+ }
+
+ Irp->IoStatus.Status = nErrCode;
+ IoCompleteRequest(Irp, IO_NO_INCREMENT);
+
+ return (nErrCode);
}
VOID STDCALL
@@ -121,62 +150,56 @@
NTSTATUS STDCALL
DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
{
- PDEVICE_OBJECT pdoNullDevice;
- PDEVICE_OBJECT pdoZeroDevice;
- UNICODE_STRING wstrNullDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Null");
- UNICODE_STRING wstrZeroDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Zero");
- NTSTATUS nErrCode;
+ PDEVICE_OBJECT pdoNullDevice;
+ PDEVICE_OBJECT pdoZeroDevice;
+ UNICODE_STRING wstrNullDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Null");
+ UNICODE_STRING wstrZeroDeviceName = RTL_CONSTANT_STRING(L"\\Device\\Zero");
+ NTSTATUS nErrCode;
- /* register driver routines */
- DriverObject->MajorFunction[IRP_MJ_CLOSE] = NullDispatch;
- DriverObject->MajorFunction[IRP_MJ_CREATE] = NullDispatch;
- DriverObject->MajorFunction[IRP_MJ_WRITE] = NullDispatch;
- DriverObject->MajorFunction[IRP_MJ_READ] = NullDispatch;
- DriverObject->DriverUnload = NullUnload;
+ /* register driver routines */
+ DriverObject->MajorFunction[IRP_MJ_CLOSE] = NullDispatch;
+ DriverObject->MajorFunction[IRP_MJ_CREATE] = NullDispatch;
+ DriverObject->MajorFunction[IRP_MJ_WRITE] = NullDispatch;
+ DriverObject->MajorFunction[IRP_MJ_READ] = NullDispatch;
+ DriverObject->DriverUnload = NullUnload;
- /* create null device */
- nErrCode = IoCreateDevice
- (
- DriverObject,
- sizeof(NULL_EXTENSION),
- &wstrNullDeviceName,
- FILE_DEVICE_NULL,
- 0,
- FALSE,
- &pdoNullDevice
- );
+ /* create null device */
+ nErrCode = IoCreateDevice(DriverObject,
+ sizeof(NULL_EXTENSION),
+ &wstrNullDeviceName,
+ FILE_DEVICE_NULL,
+ 0,
+ FALSE,
+ &pdoNullDevice);
- /* failure */
- if(!NT_SUCCESS(nErrCode))
- {
- return (nErrCode);
- }
+ /* failure */
+ if(!NT_SUCCESS(nErrCode))
+ {
+ return (nErrCode);
+ }
- pdoNullDevice->DeviceExtension = (PVOID)&nxNull;
+ pdoNullDevice->DeviceExtension = (PVOID)&nxNull;
- /* create zero device */
- nErrCode = IoCreateDevice
- (
- DriverObject,
- sizeof(NULL_EXTENSION),
- &wstrZeroDeviceName,
- FILE_DEVICE_NULL,
- FILE_READ_ONLY_DEVICE, /* zero device is read-only */
- FALSE,
- &pdoZeroDevice
- );
+ /* create zero device */
+ nErrCode = IoCreateDevice(DriverObject,
+ sizeof(NULL_EXTENSION),
+ &wstrZeroDeviceName,
+ FILE_DEVICE_NULL,
+ FILE_READ_ONLY_DEVICE, /* zero device is read-only */
+ FALSE,
+ &pdoZeroDevice);
- /* failure */
- if(!NT_SUCCESS(nErrCode))
- {
- IoDeleteDevice(pdoNullDevice);
- return (nErrCode);
- }
+ /* failure */
+ if(!NT_SUCCESS(nErrCode))
+ {
+ IoDeleteDevice(pdoNullDevice);
+ return (nErrCode);
+ }
- pdoZeroDevice->DeviceExtension = (PVOID)&nxZero;
- pdoZeroDevice->Flags |= DO_BUFFERED_IO;
+ pdoZeroDevice->DeviceExtension = (PVOID)&nxZero;
+ pdoZeroDevice->Flags |= DO_BUFFERED_IO;
- return (nErrCode);
+ return (nErrCode);
}
/* EOF */