Added null driver (originally written by David Welch and KJK:Hyperion). Added: trunk/reactos/drivers/base/null/ Added: trunk/reactos/drivers/base/null/null.c Added: trunk/reactos/drivers/base/null/null.h Added: trunk/reactos/drivers/base/null/null.rbuild Added: trunk/reactos/drivers/base/null/null.rc _____
Added: trunk/reactos/drivers/base/null/null.c --- trunk/reactos/drivers/base/null/null.c 2006-01-30 00:12:14 UTC (rev 39) +++ trunk/reactos/drivers/base/null/null.c 2006-01-30 00:15:24 UTC (rev 40) @@ -0,0 +1,205 @@
+/* $Id: null.c 18302 2005-10-06 21:39:18Z weiden $ + * + * COPYRIGHT: See COPYING in the top level directory + * PROJECT: ReactOS kernel + * FILE: services/null/null.c + * PURPOSE: NULL device driver + * PROGRAMMER: David Welch (welch@mcmail.com) + * UPDATE HISTORY: + * 13/08/1998: Created + * 29/04/2002: Fixed bugs, added zero-stream device + * 28/06/2004: Compile against the DDK, use PSEH where necessary + */ + +/* INCLUDES */ +#include <ntddk.h> + +#include <pseh/pseh.h> + +#include "null.h" + +/* OBJECTS */ +static const NULL_EXTENSION nxNull = NullBitBucket; +static const NULL_EXTENSION nxZero = NullZeroStream; + +/* FUNCTIONS */ +static NTSTATUS STDCALL +NullDispatch(PDEVICE_OBJECT DeviceObject, PIRP Irp) +{ + PIO_STACK_LOCATION piosStack = IoGetCurrentIrpStackLocation(Irp); + NTSTATUS nErrCode; + + 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; + + default: + ASSERT(FALSE); + } + + 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; + + default: + ASSERT(FALSE); + } + + 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; + + break; + + default: + ASSERT(FALSE); + + } + + break; + } + + 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; + + default: + Irp->IoStatus.Information = 0; + nErrCode = STATUS_NOT_IMPLEMENTED; + } + break; + + default: + Irp->IoStatus.Information = 0; + nErrCode = STATUS_NOT_IMPLEMENTED; + + } + + Irp->IoStatus.Status = nErrCode; + IoCompleteRequest(Irp, IO_NO_INCREMENT); + + return (nErrCode); +} + +static VOID STDCALL +NullUnload(PDRIVER_OBJECT DriverObject) +{ +} + +/* TODO: \Device\Zero should be memory-mappable */ +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; + + /* 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); + + /* failure */ + if(!NT_SUCCESS(nErrCode)) + { + return (nErrCode); + } + + 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); + + /* failure */ + if(!NT_SUCCESS(nErrCode)) + { + IoDeleteDevice(pdoNullDevice); + return (nErrCode); + } + + pdoZeroDevice->DeviceExtension = (PVOID)&nxZero; + pdoZeroDevice->Flags |= DO_BUFFERED_IO; + + return (nErrCode); +} + +/* EOF */ _____
Added: trunk/reactos/drivers/base/null/null.h --- trunk/reactos/drivers/base/null/null.h 2006-01-30 00:12:14 UTC (rev 39) +++ trunk/reactos/drivers/base/null/null.h 2006-01-30 00:15:24 UTC (rev 40) @@ -0,0 +1,22 @@
+/* $Id: null.h 18302 2005-10-06 21:39:18Z weiden $ + * + * COPYRIGHT: See COPYING in the top level directory + * PROJECT: ReactOS kernel + * FILE: services/dd/null/null.h + * PURPOSE: NULL device driver internal definitions + * PROGRAMMER: KJK::Hyperion noog@libero.it + * UPDATE HISTORY: + * 29/04/2002: Created + */ + +typedef enum __tagNULL_EXTENSION{ + NullBitBucket, + NullZeroStream, +} NULL_EXTENSION, *PNULL_EXTENSION; + +#define NULL_DEVICE_TYPE(__DEVICE__) (*((PNULL_EXTENSION)((__DEVICE__)->DeviceExtension))) + +NTSTATUS STDCALL +DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath); + +/* EOF */ _____
Added: trunk/reactos/drivers/base/null/null.rbuild --- trunk/reactos/drivers/base/null/null.rbuild 2006-01-30 00:12:14 UTC (rev 39) +++ trunk/reactos/drivers/base/null/null.rbuild 2006-01-30 00:15:24 UTC (rev 40) @@ -0,0 +1,9 @@
+<module name="null" type="kernelmodedriver" installbase="system32/drivers" installname="null.sys"> + <include base="null">.</include> + <define name="__USE_W32API" /> + <library>pseh</library> + <library>ntoskrnl</library> + <library>hal</library> + <file>null.c</file> + <file>null.rc</file> +</module> _____
Added: trunk/reactos/drivers/base/null/null.rc --- trunk/reactos/drivers/base/null/null.rc 2006-01-30 00:12:14 UTC (rev 39) +++ trunk/reactos/drivers/base/null/null.rc 2006-01-30 00:15:24 UTC (rev 40) @@ -0,0 +1,7 @@
+/* $Id: null.rc 12852 2005-01-06 13:58:04Z mf $ */ + +#define REACTOS_VERSION_DLL +#define REACTOS_STR_FILE_DESCRIPTION "Null Device Driver\0" +#define REACTOS_STR_INTERNAL_NAME "null\0" +#define REACTOS_STR_ORIGINAL_FILENAME "null.sys\0" +#include <reactos/version.rc>
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