[ros-diffs] [arty] 40: Added null driver (originally written by
David Welch and KJK:Hyperion).
arty at svn.reactos.org
arty at svn.reactos.org
Mon Jan 30 01:15:43 CET 2006
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 at 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 at 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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