778 lines
24 KiB
C
778 lines
24 KiB
C
/*++
|
||
|
||
Copyright (C) Microsoft Corporation, 1991 - 1999
|
||
|
||
Module Name:
|
||
|
||
classwmi.c
|
||
|
||
Abstract:
|
||
|
||
SCSI class driver routines
|
||
|
||
Environment:
|
||
|
||
kernel mode only
|
||
|
||
Notes:
|
||
|
||
|
||
Revision History:
|
||
|
||
--*/
|
||
|
||
#include "stddef.h"
|
||
#include "ntddk.h"
|
||
#include "scsi.h"
|
||
|
||
#include "classpnp.h"
|
||
|
||
#include "mountdev.h"
|
||
|
||
#include <stdarg.h>
|
||
|
||
#include "wmistr.h"
|
||
|
||
NTSTATUS
|
||
ClassSystemControl(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp
|
||
);
|
||
|
||
BOOLEAN
|
||
ClassFindGuid(
|
||
PGUIDREGINFO GuidList,
|
||
ULONG GuidCount,
|
||
LPGUID Guid,
|
||
PULONG GuidIndex
|
||
);
|
||
|
||
//
|
||
// This is the name for the MOF resource that must be part of all drivers that
|
||
// register via this interface.
|
||
#define MOFRESOURCENAME L"MofResourceName"
|
||
|
||
//
|
||
// What can be paged ???
|
||
#ifdef ALLOC_PRAGMA
|
||
#pragma alloc_text(PAGE, ClassSystemControl)
|
||
#pragma alloc_text(PAGE, ClassFindGuid)
|
||
#endif
|
||
|
||
|
||
/*++////////////////////////////////////////////////////////////////////////////
|
||
|
||
ClassFindGuid()
|
||
|
||
Routine Description:
|
||
|
||
This routine will search the list of guids registered and return
|
||
the index for the one that was registered.
|
||
|
||
Arguments:
|
||
|
||
GuidList is the list of guids to search
|
||
|
||
GuidCount is the count of guids in the list
|
||
|
||
Guid is the guid being searched for
|
||
|
||
*GuidIndex returns the index to the guid
|
||
|
||
Return Value:
|
||
|
||
TRUE if guid is found else FALSE
|
||
|
||
--*/
|
||
BOOLEAN
|
||
ClassFindGuid(
|
||
PGUIDREGINFO GuidList,
|
||
ULONG GuidCount,
|
||
LPGUID Guid,
|
||
PULONG GuidIndex
|
||
)
|
||
{
|
||
ULONG i;
|
||
|
||
PAGED_CODE();
|
||
|
||
for (i = 0; i < GuidCount; i++)
|
||
{
|
||
if (IsEqualGUID(Guid, &GuidList[i].Guid))
|
||
{
|
||
*GuidIndex = i;
|
||
return(TRUE);
|
||
}
|
||
}
|
||
|
||
return(FALSE);
|
||
} // end ClassFindGuid()
|
||
|
||
/*++////////////////////////////////////////////////////////////////////////////
|
||
|
||
ClassSystemControl()
|
||
|
||
Routine Description:
|
||
|
||
Dispatch routine for IRP_MJ_SYSTEM_CONTROL. This routine will process
|
||
all wmi requests received, forwarding them if they are not for this
|
||
driver or determining if the guid is valid and if so passing it to
|
||
the driver specific function for handing wmi requests.
|
||
|
||
Arguments:
|
||
|
||
DeviceObject - Supplies a pointer to the device object for this request.
|
||
|
||
Irp - Supplies the Irp making the request.
|
||
|
||
Return Value:
|
||
|
||
status
|
||
|
||
--*/
|
||
NTSTATUS
|
||
ClassSystemControl(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp
|
||
)
|
||
{
|
||
PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
|
||
PCLASS_DRIVER_EXTENSION driverExtension;
|
||
PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
|
||
ULONG isRemoved;
|
||
ULONG bufferSize;
|
||
PUCHAR buffer;
|
||
NTSTATUS status;
|
||
UCHAR minorFunction;
|
||
ULONG guidIndex;
|
||
PCLASS_WMI_INFO classWmiInfo;
|
||
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// Make sure device has not been removed
|
||
isRemoved = ClassAcquireRemoveLock(DeviceObject, Irp);
|
||
if(isRemoved)
|
||
{
|
||
Irp->IoStatus.Status = STATUS_DEVICE_DOES_NOT_EXIST;
|
||
ClassReleaseRemoveLock(DeviceObject, Irp);
|
||
ClassCompleteRequest(DeviceObject, Irp, IO_NO_INCREMENT);
|
||
return STATUS_DEVICE_DOES_NOT_EXIST;
|
||
}
|
||
|
||
//
|
||
// If the irp is not a WMI irp or it is not targetted at this device
|
||
// or this device has not regstered with WMI then just forward it on.
|
||
minorFunction = irpStack->MinorFunction;
|
||
if ((minorFunction > IRP_MN_EXECUTE_METHOD) ||
|
||
(irpStack->Parameters.WMI.ProviderId != (ULONG_PTR)DeviceObject) ||
|
||
((minorFunction != IRP_MN_REGINFO) &&
|
||
(commonExtension->GuidRegInfo == NULL)))
|
||
{
|
||
//
|
||
// CONSIDER: Do I need to hang onto lock until IoCallDriver returns ?
|
||
IoSkipCurrentIrpStackLocation(Irp);
|
||
ClassReleaseRemoveLock(DeviceObject, Irp);
|
||
return(IoCallDriver(commonExtension->LowerDeviceObject, Irp));
|
||
}
|
||
|
||
buffer = (PUCHAR)irpStack->Parameters.WMI.Buffer;
|
||
bufferSize = irpStack->Parameters.WMI.BufferSize;
|
||
|
||
if (minorFunction != IRP_MN_REGINFO)
|
||
{
|
||
//
|
||
// For all requests other than query registration info we are passed
|
||
// a guid. Determine if the guid is one that is supported by the
|
||
// device.
|
||
if (ClassFindGuid(commonExtension->GuidRegInfo,
|
||
commonExtension->GuidCount,
|
||
(LPGUID)irpStack->Parameters.WMI.DataPath,
|
||
&guidIndex))
|
||
{
|
||
status = STATUS_SUCCESS;
|
||
} else {
|
||
status = STATUS_WMI_GUID_NOT_FOUND;
|
||
}
|
||
|
||
if (NT_SUCCESS(status) &&
|
||
((minorFunction == IRP_MN_QUERY_SINGLE_INSTANCE) ||
|
||
(minorFunction == IRP_MN_CHANGE_SINGLE_INSTANCE) ||
|
||
(minorFunction == IRP_MN_CHANGE_SINGLE_ITEM) ||
|
||
(minorFunction == IRP_MN_EXECUTE_METHOD)))
|
||
{
|
||
if ( (((PWNODE_HEADER)buffer)->Flags) &
|
||
WNODE_FLAG_STATIC_INSTANCE_NAMES)
|
||
{
|
||
if ( ((PWNODE_SINGLE_INSTANCE)buffer)->InstanceIndex != 0 )
|
||
{
|
||
status = STATUS_WMI_INSTANCE_NOT_FOUND;
|
||
}
|
||
} else {
|
||
status = STATUS_WMI_INSTANCE_NOT_FOUND;
|
||
}
|
||
}
|
||
|
||
if (! NT_SUCCESS(status))
|
||
{
|
||
Irp->IoStatus.Status = status;
|
||
ClassReleaseRemoveLock(DeviceObject, Irp);
|
||
ClassCompleteRequest(DeviceObject, Irp, IO_NO_INCREMENT);
|
||
return(status);
|
||
}
|
||
}
|
||
|
||
driverExtension = commonExtension->DriverExtension;
|
||
|
||
classWmiInfo = commonExtension->IsFdo ?
|
||
&driverExtension->InitData.FdoData.ClassWmiInfo :
|
||
&driverExtension->InitData.PdoData.ClassWmiInfo;
|
||
switch(minorFunction)
|
||
{
|
||
case IRP_MN_REGINFO:
|
||
{
|
||
ULONG guidCount;
|
||
PGUIDREGINFO guidList;
|
||
PWMIREGINFOW wmiRegInfo;
|
||
PWMIREGGUIDW wmiRegGuid;
|
||
PDEVICE_OBJECT pdo;
|
||
PUNICODE_STRING regPath;
|
||
PWCHAR stringPtr;
|
||
ULONG retSize;
|
||
ULONG registryPathOffset;
|
||
ULONG mofResourceOffset;
|
||
ULONG bufferNeeded;
|
||
ULONG i;
|
||
ULONG_PTR nameInfo;
|
||
ULONG nameSize, nameOffset, nameFlags;
|
||
UNICODE_STRING name, mofName;
|
||
PCLASS_QUERY_WMI_REGINFO_EX ClassQueryWmiRegInfoEx;
|
||
|
||
name.Buffer = NULL;
|
||
name.Length = 0;
|
||
name.MaximumLength = 0;
|
||
nameFlags = 0;
|
||
|
||
ClassQueryWmiRegInfoEx = commonExtension->IsFdo ?
|
||
driverExtension->ClassFdoQueryWmiRegInfoEx :
|
||
driverExtension->ClassPdoQueryWmiRegInfoEx;
|
||
|
||
if (ClassQueryWmiRegInfoEx == NULL)
|
||
{
|
||
status = classWmiInfo->ClassQueryWmiRegInfo(
|
||
DeviceObject,
|
||
&nameFlags,
|
||
&name);
|
||
|
||
RtlInitUnicodeString(&mofName, MOFRESOURCENAME);
|
||
} else {
|
||
RtlInitUnicodeString(&mofName, L"");
|
||
status = (*ClassQueryWmiRegInfoEx)(
|
||
DeviceObject,
|
||
&nameFlags,
|
||
&name,
|
||
&mofName);
|
||
}
|
||
|
||
if (NT_SUCCESS(status) &&
|
||
(! (nameFlags & WMIREG_FLAG_INSTANCE_PDO) &&
|
||
(name.Buffer == NULL)))
|
||
{
|
||
//
|
||
// if PDO flag not specified then an instance name must be
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
}
|
||
|
||
if (NT_SUCCESS(status))
|
||
{
|
||
guidList = classWmiInfo->GuidRegInfo;
|
||
guidCount = classWmiInfo->GuidCount;
|
||
|
||
nameOffset = sizeof(WMIREGINFO) +
|
||
guidCount * sizeof(WMIREGGUIDW);
|
||
|
||
if (nameFlags & WMIREG_FLAG_INSTANCE_PDO)
|
||
{
|
||
nameSize = 0;
|
||
nameInfo = commonExtension->IsFdo ?
|
||
(ULONG_PTR)((PFUNCTIONAL_DEVICE_EXTENSION)commonExtension)->LowerPdo :
|
||
(ULONG_PTR)DeviceObject;
|
||
} else {
|
||
nameFlags |= WMIREG_FLAG_INSTANCE_LIST;
|
||
nameSize = name.Length + sizeof(USHORT);
|
||
nameInfo = nameOffset;
|
||
}
|
||
|
||
mofResourceOffset = nameOffset + nameSize;
|
||
|
||
registryPathOffset = mofResourceOffset +
|
||
mofName.Length + sizeof(USHORT);
|
||
|
||
regPath = &driverExtension->RegistryPath;
|
||
bufferNeeded = registryPathOffset +
|
||
regPath->Length + sizeof(USHORT);
|
||
|
||
if (bufferNeeded <= bufferSize)
|
||
{
|
||
retSize = bufferNeeded;
|
||
|
||
commonExtension->GuidCount = guidCount;
|
||
commonExtension->GuidRegInfo = guidList;
|
||
|
||
wmiRegInfo = (PWMIREGINFO)buffer;
|
||
wmiRegInfo->BufferSize = bufferNeeded;
|
||
wmiRegInfo->NextWmiRegInfo = 0;
|
||
wmiRegInfo->MofResourceName = mofResourceOffset;
|
||
wmiRegInfo->RegistryPath = registryPathOffset;
|
||
wmiRegInfo->GuidCount = guidCount;
|
||
|
||
for (i = 0; i < guidCount; i++)
|
||
{
|
||
wmiRegGuid = &wmiRegInfo->WmiRegGuid[i];
|
||
wmiRegGuid->Guid = guidList[i].Guid;
|
||
wmiRegGuid->Flags = guidList[i].Flags | nameFlags;
|
||
wmiRegGuid->InstanceInfo = nameInfo;
|
||
wmiRegGuid->InstanceCount = 1;
|
||
}
|
||
|
||
if ( nameFlags & WMIREG_FLAG_INSTANCE_LIST)
|
||
{
|
||
stringPtr = (PWCHAR)((PUCHAR)buffer + nameOffset);
|
||
*stringPtr++ = name.Length;
|
||
RtlCopyMemory(stringPtr,
|
||
name.Buffer,
|
||
name.Length);
|
||
}
|
||
|
||
stringPtr = (PWCHAR)((PUCHAR)buffer + mofResourceOffset);
|
||
*stringPtr++ = mofName.Length;
|
||
RtlCopyMemory(stringPtr,
|
||
mofName.Buffer,
|
||
mofName.Length);
|
||
|
||
stringPtr = (PWCHAR)((PUCHAR)buffer + registryPathOffset);
|
||
*stringPtr++ = regPath->Length;
|
||
RtlCopyMemory(stringPtr,
|
||
regPath->Buffer,
|
||
regPath->Length);
|
||
} else {
|
||
*((PULONG)buffer) = bufferNeeded;
|
||
retSize = sizeof(ULONG);
|
||
}
|
||
} else {
|
||
retSize = 0;
|
||
}
|
||
|
||
if (name.Buffer != NULL)
|
||
{
|
||
ExFreePool(name.Buffer);
|
||
}
|
||
|
||
Irp->IoStatus.Status = status;
|
||
Irp->IoStatus.Information = retSize;
|
||
ClassReleaseRemoveLock(DeviceObject, Irp);
|
||
ClassCompleteRequest(DeviceObject, Irp, IO_NO_INCREMENT);
|
||
return(status);
|
||
}
|
||
|
||
case IRP_MN_QUERY_ALL_DATA:
|
||
{
|
||
PWNODE_ALL_DATA wnode;
|
||
ULONG bufferAvail;
|
||
|
||
wnode = (PWNODE_ALL_DATA)buffer;
|
||
|
||
if (bufferSize < sizeof(WNODE_ALL_DATA))
|
||
{
|
||
bufferAvail = 0;
|
||
} else {
|
||
bufferAvail = bufferSize - sizeof(WNODE_ALL_DATA);
|
||
}
|
||
|
||
wnode->DataBlockOffset = sizeof(WNODE_ALL_DATA);
|
||
|
||
status = classWmiInfo->ClassQueryWmiDataBlock(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
bufferAvail,
|
||
buffer + sizeof(WNODE_ALL_DATA));
|
||
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_QUERY_SINGLE_INSTANCE:
|
||
{
|
||
PWNODE_SINGLE_INSTANCE wnode;
|
||
ULONG dataBlockOffset;
|
||
|
||
wnode = (PWNODE_SINGLE_INSTANCE)buffer;
|
||
|
||
dataBlockOffset = wnode->DataBlockOffset;
|
||
|
||
status = classWmiInfo->ClassQueryWmiDataBlock(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
bufferSize - dataBlockOffset,
|
||
(PUCHAR)wnode + dataBlockOffset);
|
||
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_CHANGE_SINGLE_INSTANCE:
|
||
{
|
||
PWNODE_SINGLE_INSTANCE wnode;
|
||
|
||
wnode = (PWNODE_SINGLE_INSTANCE)buffer;
|
||
|
||
status = classWmiInfo->ClassSetWmiDataBlock(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
wnode->SizeDataBlock,
|
||
(PUCHAR)wnode + wnode->DataBlockOffset);
|
||
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_CHANGE_SINGLE_ITEM:
|
||
{
|
||
PWNODE_SINGLE_ITEM wnode;
|
||
|
||
wnode = (PWNODE_SINGLE_ITEM)buffer;
|
||
|
||
status = classWmiInfo->ClassSetWmiDataItem(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
wnode->ItemId,
|
||
wnode->SizeDataItem,
|
||
(PUCHAR)wnode + wnode->DataBlockOffset);
|
||
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_EXECUTE_METHOD:
|
||
{
|
||
PWNODE_METHOD_ITEM wnode;
|
||
|
||
wnode = (PWNODE_METHOD_ITEM)buffer;
|
||
|
||
status = classWmiInfo->ClassExecuteWmiMethod(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
wnode->MethodId,
|
||
wnode->SizeDataBlock,
|
||
bufferSize - wnode->DataBlockOffset,
|
||
buffer + wnode->DataBlockOffset);
|
||
|
||
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_ENABLE_EVENTS:
|
||
{
|
||
status = classWmiInfo->ClassWmiFunctionControl(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
EventGeneration,
|
||
TRUE);
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_DISABLE_EVENTS:
|
||
{
|
||
status = classWmiInfo->ClassWmiFunctionControl(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
EventGeneration,
|
||
FALSE);
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_ENABLE_COLLECTION:
|
||
{
|
||
status = classWmiInfo->ClassWmiFunctionControl(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
DataBlockCollection,
|
||
TRUE);
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_DISABLE_COLLECTION:
|
||
{
|
||
status = classWmiInfo->ClassWmiFunctionControl(
|
||
DeviceObject,
|
||
Irp,
|
||
guidIndex,
|
||
DataBlockCollection,
|
||
FALSE);
|
||
break;
|
||
}
|
||
|
||
default:
|
||
{
|
||
status = STATUS_INVALID_DEVICE_REQUEST;
|
||
break;
|
||
}
|
||
|
||
}
|
||
|
||
return(status);
|
||
} // end ClassSystemControl()
|
||
|
||
/*++////////////////////////////////////////////////////////////////////////////
|
||
|
||
ClassWmiCompleteRequest()
|
||
|
||
Routine Description:
|
||
|
||
|
||
This routine will do the work of completing a WMI irp. Depending upon the
|
||
the WMI request this routine will fixup the returned WNODE appropriately.
|
||
|
||
NOTE: This routine assumes that the ClassRemoveLock is held and it will
|
||
release it.
|
||
|
||
Arguments:
|
||
|
||
DeviceObject - Supplies a pointer to the device object for this request.
|
||
|
||
Irp - Supplies the Irp making the request.
|
||
|
||
Status - Status to complete the irp with. STATUS_BUFFER_TOO_SMALL is used
|
||
to indicate that more buffer is required for the data requested.
|
||
|
||
BufferUsed - number of bytes of actual data to return (not including WMI
|
||
specific structures)
|
||
|
||
PriorityBoost - priority boost to pass to ClassCompleteRequest
|
||
|
||
Return Value:
|
||
|
||
status
|
||
|
||
--*/
|
||
SCSIPORT_API
|
||
NTSTATUS
|
||
ClassWmiCompleteRequest(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN PIRP Irp,
|
||
IN NTSTATUS Status,
|
||
IN ULONG BufferUsed,
|
||
IN CCHAR PriorityBoost
|
||
)
|
||
{
|
||
PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
|
||
PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
|
||
UCHAR MinorFunction;
|
||
PUCHAR buffer;
|
||
ULONG retSize;
|
||
UCHAR minorFunction;
|
||
ULONG bufferSize;
|
||
|
||
minorFunction = irpStack->MinorFunction;
|
||
buffer = (PUCHAR)irpStack->Parameters.WMI.Buffer;
|
||
bufferSize = irpStack->Parameters.WMI.BufferSize;
|
||
|
||
switch(minorFunction)
|
||
{
|
||
case IRP_MN_QUERY_ALL_DATA:
|
||
{
|
||
PWNODE_ALL_DATA wnode;
|
||
PWNODE_TOO_SMALL wnodeTooSmall;
|
||
ULONG bufferNeeded;
|
||
|
||
wnode = (PWNODE_ALL_DATA)buffer;
|
||
|
||
bufferNeeded = sizeof(WNODE_ALL_DATA) + BufferUsed;
|
||
|
||
if (NT_SUCCESS(Status))
|
||
{
|
||
retSize = bufferNeeded;
|
||
wnode->WnodeHeader.BufferSize = bufferNeeded;
|
||
KeQuerySystemTime(&wnode->WnodeHeader.TimeStamp);
|
||
wnode->WnodeHeader.Flags |= WNODE_FLAG_FIXED_INSTANCE_SIZE;
|
||
wnode->FixedInstanceSize = BufferUsed;
|
||
wnode->InstanceCount = 1;
|
||
|
||
} else if (Status == STATUS_BUFFER_TOO_SMALL) {
|
||
wnodeTooSmall = (PWNODE_TOO_SMALL)wnode;
|
||
|
||
wnodeTooSmall->WnodeHeader.BufferSize = sizeof(WNODE_TOO_SMALL);
|
||
wnodeTooSmall->WnodeHeader.Flags = WNODE_FLAG_TOO_SMALL;
|
||
wnodeTooSmall->SizeNeeded = sizeof(WNODE_ALL_DATA) + BufferUsed;
|
||
retSize = sizeof(WNODE_TOO_SMALL);
|
||
Status = STATUS_SUCCESS;
|
||
} else {
|
||
retSize = 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_QUERY_SINGLE_INSTANCE:
|
||
{
|
||
PWNODE_SINGLE_INSTANCE wnode;
|
||
PWNODE_TOO_SMALL wnodeTooSmall;
|
||
ULONG bufferNeeded;
|
||
|
||
wnode = (PWNODE_SINGLE_INSTANCE)buffer;
|
||
|
||
bufferNeeded = wnode->DataBlockOffset + BufferUsed;
|
||
|
||
if (NT_SUCCESS(Status))
|
||
{
|
||
retSize = bufferNeeded;
|
||
wnode->WnodeHeader.BufferSize = bufferNeeded;
|
||
KeQuerySystemTime(&wnode->WnodeHeader.TimeStamp);
|
||
wnode->SizeDataBlock = BufferUsed;
|
||
|
||
} else if (Status == STATUS_BUFFER_TOO_SMALL) {
|
||
wnodeTooSmall = (PWNODE_TOO_SMALL)wnode;
|
||
|
||
wnodeTooSmall->WnodeHeader.BufferSize = sizeof(WNODE_TOO_SMALL);
|
||
wnodeTooSmall->WnodeHeader.Flags = WNODE_FLAG_TOO_SMALL;
|
||
wnodeTooSmall->SizeNeeded = bufferNeeded;
|
||
retSize = sizeof(WNODE_TOO_SMALL);
|
||
Status = STATUS_SUCCESS;
|
||
} else {
|
||
retSize = 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
case IRP_MN_EXECUTE_METHOD:
|
||
{
|
||
PWNODE_METHOD_ITEM wnode;
|
||
PWNODE_TOO_SMALL wnodeTooSmall;
|
||
ULONG bufferNeeded;
|
||
|
||
wnode = (PWNODE_METHOD_ITEM)buffer;
|
||
|
||
bufferNeeded = wnode->DataBlockOffset + BufferUsed;
|
||
|
||
if (NT_SUCCESS(Status))
|
||
{
|
||
retSize = bufferNeeded;
|
||
wnode->WnodeHeader.BufferSize = bufferNeeded;
|
||
KeQuerySystemTime(&wnode->WnodeHeader.TimeStamp);
|
||
wnode->SizeDataBlock = BufferUsed;
|
||
|
||
} else if (Status == STATUS_BUFFER_TOO_SMALL) {
|
||
wnodeTooSmall = (PWNODE_TOO_SMALL)wnode;
|
||
|
||
wnodeTooSmall->WnodeHeader.BufferSize = sizeof(WNODE_TOO_SMALL);
|
||
wnodeTooSmall->WnodeHeader.Flags = WNODE_FLAG_TOO_SMALL;
|
||
wnodeTooSmall->SizeNeeded = bufferNeeded;
|
||
retSize = sizeof(WNODE_TOO_SMALL);
|
||
Status = STATUS_SUCCESS;
|
||
} else {
|
||
retSize = 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
default:
|
||
{
|
||
//
|
||
// All other requests don't return any data
|
||
retSize = 0;
|
||
break;
|
||
}
|
||
|
||
}
|
||
|
||
Irp->IoStatus.Status = Status;
|
||
Irp->IoStatus.Information = retSize;
|
||
ClassReleaseRemoveLock(DeviceObject, Irp);
|
||
ClassCompleteRequest(DeviceObject, Irp, PriorityBoost);
|
||
return(Status);
|
||
} // end ClassWmiCompleteRequest()
|
||
|
||
/*++////////////////////////////////////////////////////////////////////////////
|
||
|
||
ClassWmiFireEvent()
|
||
|
||
Routine Description:
|
||
|
||
This routine will fire a WMI event using the data buffer passed. This
|
||
routine may be called at or below DPC level
|
||
|
||
Arguments:
|
||
|
||
DeviceObject - Supplies a pointer to the device object for this event
|
||
|
||
Guid is pointer to the GUID that represents the event
|
||
|
||
InstanceIndex is the index of the instance of the event
|
||
|
||
EventDataSize is the number of bytes of data that is being fired with
|
||
with the event
|
||
|
||
EventData is the data that is fired with the events. This may be NULL
|
||
if there is no data associated with the event
|
||
|
||
|
||
Return Value:
|
||
|
||
status
|
||
|
||
--*/
|
||
NTSTATUS
|
||
ClassWmiFireEvent(
|
||
IN PDEVICE_OBJECT DeviceObject,
|
||
IN LPGUID Guid,
|
||
IN ULONG InstanceIndex,
|
||
IN ULONG EventDataSize,
|
||
IN PVOID EventData
|
||
)
|
||
{
|
||
|
||
ULONG sizeNeeded;
|
||
PWNODE_SINGLE_INSTANCE event;
|
||
NTSTATUS status;
|
||
|
||
if (EventData == NULL)
|
||
{
|
||
EventDataSize = 0;
|
||
}
|
||
|
||
sizeNeeded = sizeof(WNODE_SINGLE_INSTANCE) + EventDataSize;
|
||
|
||
event = ExAllocatePoolWithTag(NonPagedPool, sizeNeeded, CLASS_TAG_WMI);
|
||
if (event != NULL)
|
||
{
|
||
event->WnodeHeader.Guid = *Guid;
|
||
event->WnodeHeader.ProviderId = IoWMIDeviceObjectToProviderId(DeviceObject);
|
||
event->WnodeHeader.BufferSize = sizeNeeded;
|
||
event->WnodeHeader.Flags = WNODE_FLAG_SINGLE_INSTANCE |
|
||
WNODE_FLAG_EVENT_ITEM |
|
||
WNODE_FLAG_STATIC_INSTANCE_NAMES;
|
||
KeQuerySystemTime(&event->WnodeHeader.TimeStamp);
|
||
|
||
event->InstanceIndex = InstanceIndex;
|
||
event->SizeDataBlock = EventDataSize;
|
||
event->DataBlockOffset = sizeof(WNODE_SINGLE_INSTANCE);
|
||
if (EventData != NULL)
|
||
{
|
||
RtlCopyMemory( &event->VariableData, EventData, EventDataSize);
|
||
}
|
||
|
||
status = IoWMIWriteEvent(event);
|
||
if (! NT_SUCCESS(status))
|
||
{
|
||
ExFreePool(event);
|
||
}
|
||
} else {
|
||
status = STATUS_INSUFFICIENT_RESOURCES;
|
||
}
|
||
|
||
return(status);
|
||
} // end ClassWmiFireEvent()
|