368 lines
10 KiB
C
368 lines
10 KiB
C
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/*++
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Copyright (c) 1996-1998 Microsoft Corporation
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Module Name:
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cldskwmi.c
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Abstract:
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km wmi tracing code.
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Will be shared between our drivers.
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Authors:
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GorN 10-Aug-1999
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Environment:
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kernel mode only
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Notes:
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Revision History:
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Comments:
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This code is a quick hack to enable WMI tracing in cluster drivers.
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It should eventually go away.
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WmlTinySystemControl will be replaced with WmilibSystemControl from wmilib.sys .
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WmlTrace or equivalent will be added to the kernel in addition to IoWMIWriteEvent(&TraceBuffer);
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--*/
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#include <wdm.h>
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#include <stdarg.h> // to get va_list, etc
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#include <wmistr.h>
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#include <wmiumkm.h>
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#include <evntrace.h>
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#include "wmlkm.h"
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BOOLEAN
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WmlpFindGuid(
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IN PWML_CONTROL_GUID_REG GuidList,
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IN ULONG GuidCount,
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IN LPGUID Guid,
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OUT PULONG GuidIndex
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)
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/*++
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Routine Description:
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This routine will search the list of guids registered and return
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the index for the one that was registered.
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Arguments:
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GuidList is the list of guids to search
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GuidCount is the count of guids in the list
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Guid is the guid being searched for
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*GuidIndex returns the index to the guid
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Return Value:
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TRUE if guid is found else FALSE
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--*/
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{
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ULONG i;
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for (i = 0; i < GuidCount; i++)
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{
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if (IsEqualGUID(Guid, &GuidList[i].Guid))
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{
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*GuidIndex = i;
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return(TRUE);
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}
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}
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return(FALSE);
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}
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NTSTATUS
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WmlTinySystemControl(
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IN OUT PWML_TINY_INFO WmiLibInfo,
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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Dispatch routine for IRP_MJ_SYSTEM_CONTROL. This routine will process
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all wmi requests received, forwarding them if they are not for this
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driver or determining if the guid is valid and if so passing it to
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the driver specific function for handing wmi requests.
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Arguments:
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WmiLibInfo has the WMI information control block
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DeviceObject - Supplies a pointer to the device object for this request.
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Irp - Supplies the Irp making the request.
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Return Value:
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status
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--*/
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{
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PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
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ULONG bufferSize;
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PUCHAR buffer;
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NTSTATUS status;
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ULONG retSize;
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UCHAR minorFunction;
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ULONG guidIndex;
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ULONG instanceCount;
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ULONG instanceIndex;
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//
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// If the irp is not a WMI irp or it is not targetted at this device
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// or this device has not regstered with WMI then just forward it on.
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minorFunction = irpStack->MinorFunction;
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if ((minorFunction > IRP_MN_EXECUTE_METHOD) ||
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(irpStack->Parameters.WMI.ProviderId != (ULONG_PTR)DeviceObject) ||
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((minorFunction != IRP_MN_REGINFO) &&
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(WmiLibInfo->GuidCount == 0) || (WmiLibInfo->ControlGuids == NULL) ))
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{
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//
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// IRP is not for us so forward if there is a lower device object
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if (WmiLibInfo->LowerDeviceObject != NULL)
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{
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IoSkipCurrentIrpStackLocation(Irp);
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return(IoCallDriver(WmiLibInfo->LowerDeviceObject, Irp));
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} else {
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status = STATUS_INVALID_DEVICE_REQUEST;
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Irp->IoStatus.Status = status;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(status);
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}
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}
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buffer = (PUCHAR)irpStack->Parameters.WMI.Buffer;
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bufferSize = irpStack->Parameters.WMI.BufferSize;
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if (minorFunction != IRP_MN_REGINFO)
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{
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//
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// For all requests other than query registration info we are passed
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// a guid. Determine if the guid is one that is supported by the
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// device.
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if (WmlpFindGuid(WmiLibInfo->ControlGuids,
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WmiLibInfo->GuidCount,
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(LPGUID)irpStack->Parameters.WMI.DataPath,
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&guidIndex) )
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{
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status = STATUS_SUCCESS;
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} else {
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status = STATUS_WMI_GUID_NOT_FOUND;
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}
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if (!NT_SUCCESS(status))
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{
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Irp->IoStatus.Status = status;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(status);
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}
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}
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switch(minorFunction)
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{
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case IRP_MN_REGINFO:
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{
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ULONG guidCount;
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PWML_CONTROL_GUID_REG guidList;
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PWMIREGINFOW wmiRegInfo;
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PWMIREGGUIDW wmiRegGuid;
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PDEVICE_OBJECT pdo;
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PUNICODE_STRING regPath;
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PWCHAR stringPtr;
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ULONG registryPathOffset;
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ULONG bufferNeeded;
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ULONG i;
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UNICODE_STRING nullRegistryPath;
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regPath = WmiLibInfo->DriverRegPath;
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guidList = WmiLibInfo->ControlGuids;
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guidCount = WmiLibInfo->GuidCount;
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if (regPath == NULL)
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{
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// No registry path specified. This is a bad thing for
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// the device to do, but is not fatal
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nullRegistryPath.Buffer = NULL;
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nullRegistryPath.Length = 0;
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nullRegistryPath.MaximumLength = 0;
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regPath = &nullRegistryPath;
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}
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registryPathOffset = FIELD_OFFSET(WMIREGINFOW, WmiRegGuid) +
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guidCount * sizeof(WMIREGGUIDW);
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bufferNeeded = registryPathOffset +
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regPath->Length + sizeof(USHORT);
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if (bufferNeeded <= bufferSize)
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{
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retSize = bufferNeeded;
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RtlZeroMemory(buffer, bufferNeeded);
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wmiRegInfo = (PWMIREGINFO)buffer;
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wmiRegInfo->BufferSize = bufferNeeded;
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// wmiRegInfo->NextWmiRegInfo = 0;
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// wmiRegInfo->MofResourceName = 0;
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wmiRegInfo->RegistryPath = registryPathOffset;
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wmiRegInfo->GuidCount = guidCount;
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for (i = 0; i < guidCount; i++)
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{
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wmiRegGuid = &wmiRegInfo->WmiRegGuid[i];
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wmiRegGuid->Guid = guidList[i].Guid;
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wmiRegGuid->Flags = WMIREG_FLAG_TRACED_GUID | WMIREG_FLAG_TRACE_CONTROL_GUID;
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// wmiRegGuid->InstanceInfo = 0;
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// wmiRegGuid->InstanceCount = 0;
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}
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stringPtr = (PWCHAR)((PUCHAR)buffer + registryPathOffset);
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*stringPtr++ = regPath->Length;
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RtlCopyMemory(stringPtr,
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regPath->Buffer,
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regPath->Length);
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status = STATUS_SUCCESS;
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} else {
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status = STATUS_BUFFER_TOO_SMALL;
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*((PULONG)buffer) = bufferNeeded;
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retSize = sizeof(ULONG);
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}
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Irp->IoStatus.Status = status;
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Irp->IoStatus.Information = retSize;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(status);
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}
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case IRP_MN_ENABLE_EVENTS:
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case IRP_MN_DISABLE_EVENTS:
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{
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PWNODE_HEADER Wnode = irpStack->Parameters.WMI.Buffer;
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PWML_CONTROL_GUID_REG Ctx = WmiLibInfo->ControlGuids + guidIndex;
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if (irpStack->Parameters.WMI.BufferSize >= sizeof(WNODE_HEADER)) {
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status = STATUS_SUCCESS;
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if (minorFunction == IRP_MN_DISABLE_EVENTS) {
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Ctx->EnableFlags64 = 0;
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} else {
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Ctx->LoggerHandle = (TRACEHANDLE)( Wnode->HistoricalContext );
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Ctx->EnableLevel = WmipGetLoggerEnableLevel(Ctx->LoggerHandle);
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Ctx->EnableFlags = WmipGetLoggerEnableFlags(Ctx->LoggerHandle);
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}
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} else {
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status = STATUS_INVALID_PARAMETER;
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}
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break;
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}
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case IRP_MN_ENABLE_COLLECTION:
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case IRP_MN_DISABLE_COLLECTION:
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{
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status = STATUS_SUCCESS;
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break;
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}
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case IRP_MN_QUERY_ALL_DATA:
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case IRP_MN_QUERY_SINGLE_INSTANCE:
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case IRP_MN_CHANGE_SINGLE_INSTANCE:
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case IRP_MN_CHANGE_SINGLE_ITEM:
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case IRP_MN_EXECUTE_METHOD:
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{
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status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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}
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default:
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{
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status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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}
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}
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Irp->IoStatus.Status = status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return(status);
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}
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typedef struct _TRACE_BUFFER {
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union {
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EVENT_TRACE_HEADER Trace;
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WNODE_HEADER Wnode;
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};
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MOF_FIELD MofFields[MAX_MOF_FIELDS + 1];
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} TRACE_BUFFER, *PTRACE_BUFFER;
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//////////////////////////////////////////////////////////////////////
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// 0 | Size | ProviderId | 0 |Size.HT.Mk | Typ.Lev.Version|
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// 2 | L o g g e r H a n d l e | 2 | T h r e a d I d |
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// 4 | T i m e S t a m p | 4 | T i m e S t a m p |
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// 6 | G U I D L o w | 6 | GUID Ptr / Guid L o w |
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// 8 | G U I D H I g h | 8 | G U I D H i g h |
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// 10 | ClientCtx | Flags | 10 |KernelTime | UserTime |
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//////////////////////////////////////////////////////////////////////
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ULONG
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WmlTrace(
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IN ULONG Type,
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IN LPCGUID TraceGuid,
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IN TRACEHANDLE LoggerHandle,
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... // Pairs: Length, Address
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)
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{
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TRACE_BUFFER TraceBuffer;
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((PULONG)&TraceBuffer)[1] = Type;
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TraceBuffer.Wnode.HistoricalContext = LoggerHandle; // [KM]
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TraceBuffer.Trace.Guid = *TraceGuid;
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TraceBuffer.Wnode.Flags =
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WNODE_FLAG_USE_MOF_PTR | // MOF data are dereferenced
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WNODE_FLAG_TRACED_GUID; // Trace Event, not a WMI event
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{
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PMOF_FIELD ptr = TraceBuffer.MofFields;
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va_list ap;
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va_start(ap, LoggerHandle);
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do {
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if ( 0 == (ptr->Length = (ULONG)va_arg (ap, size_t)) ) {
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break;
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}
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ptr->DataPtr = (ULONGLONG)va_arg(ap, PVOID);
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} while ( ++ptr < &TraceBuffer.MofFields[MAX_MOF_FIELDS] );
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va_end(ap);
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TraceBuffer.Wnode.BufferSize = (ULONG) ((ULONG_PTR)ptr - (ULONG_PTR)&TraceBuffer);
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}
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IoWMIWriteEvent(&TraceBuffer); // [KM]
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return STATUS_SUCCESS;
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}
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