654 lines
16 KiB
C
654 lines
16 KiB
C
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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sSWmi.c
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Abstract:
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Environment:
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Kernel mode
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Notes:
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Copyright (c) 2000 Microsoft Corporation.
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All Rights Reserved.
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--*/
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#include "selSusp.h"
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#include "sSPwr.h"
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#include "sSPnP.h"
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#include "sSDevCtr.h"
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#include "sSWmi.h"
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#include <initguid.h>
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#include <wdmguid.h>
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#include <wmistr.h>
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#include <wmilib.h>
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#define MOFRESOURCENAME L"MofResourceName"
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#define WMI_SELECT_SUSPEND_DRIVER_INFORMATION 0
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DEFINE_GUID (SELECT_SUSPEND_WMI_STD_DATA_GUID,
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0xBBA21300, 0x6DD3, 0x11d2, 0xB8, 0x44, 0x00, 0xC0, 0x4F, 0xAD, 0x51, 0x71);
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WMIGUIDREGINFO SSWmiGuidList[1] = { {
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&SELECT_SUSPEND_WMI_STD_DATA_GUID, 1, 0 // driver information
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}
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};
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extern GLOBALS Globals;
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extern ULONG DebugLevel;
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NTSTATUS
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SSWmiRegistration(
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IN OUT PDEVICE_EXTENSION DeviceExtension
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)
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/*++
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Routine Description:
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Registers with WMI as a data provider for this
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instance of the device
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Arguments:
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Return Value:
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--*/
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{
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NTSTATUS ntStatus;
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PAGED_CODE();
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DeviceExtension->WmiLibInfo.GuidCount =
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sizeof (SSWmiGuidList) / sizeof (WMIGUIDREGINFO);
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DeviceExtension->WmiLibInfo.GuidList = SSWmiGuidList;
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DeviceExtension->WmiLibInfo.QueryWmiRegInfo = SSQueryWmiRegInfo;
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DeviceExtension->WmiLibInfo.QueryWmiDataBlock = SSQueryWmiDataBlock;
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DeviceExtension->WmiLibInfo.SetWmiDataBlock = SSSetWmiDataBlock;
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DeviceExtension->WmiLibInfo.SetWmiDataItem = SSSetWmiDataItem;
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DeviceExtension->WmiLibInfo.ExecuteWmiMethod = NULL;
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DeviceExtension->WmiLibInfo.WmiFunctionControl = NULL;
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//
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// Register with WMI
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//
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ntStatus = IoWMIRegistrationControl(DeviceExtension->FunctionalDeviceObject,
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WMIREG_ACTION_REGISTER);
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return ntStatus;
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}
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NTSTATUS
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SSWmiDeRegistration(
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IN OUT PDEVICE_EXTENSION DeviceExtension
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)
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/*++
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Routine Description:
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Inform WMI to remove this DeviceObject from its
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list of providers. This function also
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decrements the reference count of the deviceobject.
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Arguments:
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Return Value:
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--*/
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{
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PAGED_CODE();
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return IoWMIRegistrationControl(DeviceExtension->FunctionalDeviceObject,
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WMIREG_ACTION_DEREGISTER);
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}
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NTSTATUS
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SS_DispatchSysCtrl(
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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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Arguments:
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Return Value:
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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SYSCTL_IRP_DISPOSITION disposition;
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NTSTATUS ntStatus;
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PIO_STACK_LOCATION irpStack;
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PAGED_CODE();
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irpStack = IoGetCurrentIrpStackLocation (Irp);
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deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
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SSDbgPrint(3, (WMIMinorFunctionString(irpStack->MinorFunction)));
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if(Removed == deviceExtension->DeviceState) {
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ntStatus = STATUS_DELETE_PENDING;
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Irp->IoStatus.Status = ntStatus;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return ntStatus;
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}
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SSDbgPrint(3, ("SS_DispatchSysCtrl::"));
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SSIoIncrement(deviceExtension);
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ntStatus = WmiSystemControl(&deviceExtension->WmiLibInfo,
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DeviceObject,
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Irp,
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&disposition);
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switch(disposition) {
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case IrpProcessed:
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{
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//
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// This irp has been processed and may be completed or pending.
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//
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break;
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}
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case IrpNotCompleted:
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{
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//
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// This irp has not been completed, but has been fully processed.
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// we will complete it now
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//
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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break;
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}
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case IrpForward:
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case IrpNotWmi:
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{
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//
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// This irp is either not a WMI irp or is a WMI irp targeted
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// at a device lower in the stack.
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//
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IoSkipCurrentIrpStackLocation (Irp);
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ntStatus = IoCallDriver(deviceExtension->TopOfStackDeviceObject,
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Irp);
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break;
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}
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default:
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{
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//
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// We really should never get here, but if we do just forward....
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//
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ASSERT(FALSE);
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IoSkipCurrentIrpStackLocation (Irp);
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ntStatus = IoCallDriver(deviceExtension->TopOfStackDeviceObject,
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Irp);
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break;
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}
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}
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SSDbgPrint(3, ("SS_DispatchSysCtrl::"));
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SSIoDecrement(deviceExtension);
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return ntStatus;
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}
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NTSTATUS
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SSQueryWmiRegInfo(
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IN PDEVICE_OBJECT DeviceObject,
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OUT ULONG *RegFlags,
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OUT PUNICODE_STRING InstanceName,
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OUT PUNICODE_STRING *RegistryPath,
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OUT PUNICODE_STRING MofResourceName,
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OUT PDEVICE_OBJECT *Pdo
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to retrieve the list of
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guids or data blocks that the driver wants to register with WMI. This
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routine may not pend or block. Driver should NOT call
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WmiCompleteRequest.
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Arguments:
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DeviceObject is the device whose data block is being queried
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*RegFlags returns with a set of flags that describe the guids being
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registered for this device. If the device wants enable and disable
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collection callbacks before receiving queries for the registered
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guids then it should return the WMIREG_FLAG_EXPENSIVE flag. Also the
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returned flags may specify WMIREG_FLAG_INSTANCE_PDO in which case
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the instance name is determined from the PDO associated with the
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device object. Note that the PDO must have an associated devnode. If
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WMIREG_FLAG_INSTANCE_PDO is not set then Name must return a unique
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name for the device.
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InstanceName returns with the instance name for the guids if
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WMIREG_FLAG_INSTANCE_PDO is not set in the returned *RegFlags. The
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caller will call ExFreePool with the buffer returned.
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*RegistryPath returns with the registry path of the driver
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*MofResourceName returns with the name of the MOF resource attached to
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the binary file. If the driver does not have a mof resource attached
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then this can be returned as NULL.
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*Pdo returns with the device object for the PDO associated with this
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device if the WMIREG_FLAG_INSTANCE_PDO flag is returned in
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*RegFlags.
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Return Value:
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status
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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PAGED_CODE();
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SSDbgPrint(3, ("SSQueryWmiRegInfo - begins\n"));
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deviceExtension = DeviceObject->DeviceExtension;
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*RegFlags = WMIREG_FLAG_INSTANCE_PDO;
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*RegistryPath = &Globals.SSRegistryPath;
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*Pdo = deviceExtension->PhysicalDeviceObject;
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RtlInitUnicodeString(MofResourceName, MOFRESOURCENAME);
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SSDbgPrint(3, ("SSQueryWmiRegInfo - ends\n"));
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return STATUS_SUCCESS;
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}
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NTSTATUS
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SSQueryWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG InstanceCount,
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IN OUT PULONG InstanceLengthArray,
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IN ULONG OutBufferSize,
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OUT PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to query for the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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InstanceCount is the number of instances expected to be returned for
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the data block.
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InstanceLengthArray is a pointer to an array of ULONG that returns the
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lengths of each instance of the data block. If this is NULL then
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there was not enough space in the output buffer to fulfill the request
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so the irp should be completed with the buffer needed.
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OutBufferSize has the maximum size available to write the data
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block.
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Buffer on return is filled with the returned data block
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Return Value:
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status
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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NTSTATUS ntStatus;
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ULONG size;
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WCHAR modelName[] = L"Aishverya\0\0";
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USHORT modelNameLen;
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PAGED_CODE();
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SSDbgPrint(3, ("SSQueryWmiDataBlock - begins\n"));
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size = 0;
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modelNameLen = (wcslen(modelName) + 1) * sizeof(WCHAR);
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//
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// Only ever registers 1 instance per guid
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//
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ASSERT((InstanceIndex == 0) &&
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(InstanceCount == 1));
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deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
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switch (GuidIndex) {
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case WMI_SELECT_SUSPEND_DRIVER_INFORMATION:
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size = sizeof(ULONG) + modelNameLen + sizeof(USHORT);
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if (OutBufferSize < size ) {
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SSDbgPrint(3, ("OutBuffer too small\n"));
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ntStatus = STATUS_BUFFER_TOO_SMALL;
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break;
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}
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* (PULONG) Buffer = DebugLevel;
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Buffer += sizeof(ULONG);
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//
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// put length of string ahead of string
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//
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*((PUSHORT)Buffer) = modelNameLen;
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Buffer = (PUCHAR)Buffer + sizeof(USHORT);
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RtlCopyBytes((PVOID)Buffer, (PVOID)modelName, modelNameLen);
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*InstanceLengthArray = size ;
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ntStatus = STATUS_SUCCESS;
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break;
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default:
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ntStatus = STATUS_WMI_GUID_NOT_FOUND;
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}
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ntStatus = WmiCompleteRequest(DeviceObject,
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Irp,
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ntStatus,
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size,
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IO_NO_INCREMENT);
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SSDbgPrint(3, ("SSQueryWmiDataBlock - ends\n"));
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return ntStatus;
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}
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NTSTATUS
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SSSetWmiDataItem(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG DataItemId,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to set for the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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DataItemId has the id of the data item being set
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BufferSize has the size of the data item passed
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Buffer has the new values for the data item
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Return Value:
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status
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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NTSTATUS ntStatus;
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ULONG info;
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PAGED_CODE();
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SSDbgPrint(3, ("SSSetWmiDataItem - begins\n"));
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deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
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info = 0;
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switch(GuidIndex) {
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case WMI_SELECT_SUSPEND_DRIVER_INFORMATION:
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if(DataItemId == 1) {
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if(BufferSize == sizeof(ULONG)) {
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DebugLevel = *((PULONG)Buffer);
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ntStatus = STATUS_SUCCESS;
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info = sizeof(ULONG);
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}
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else {
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ntStatus = STATUS_INFO_LENGTH_MISMATCH;
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}
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}
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else {
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ntStatus = STATUS_WMI_READ_ONLY;
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}
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break;
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default:
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ntStatus = STATUS_WMI_GUID_NOT_FOUND;
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}
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ntStatus = WmiCompleteRequest(DeviceObject,
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Irp,
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ntStatus,
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info,
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IO_NO_INCREMENT);
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SSDbgPrint(3, ("SSSetWmiDataItem - ends\n"));
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return ntStatus;
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}
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NTSTATUS
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SSSetWmiDataBlock(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN ULONG GuidIndex,
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IN ULONG InstanceIndex,
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IN ULONG BufferSize,
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IN PUCHAR Buffer
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)
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/*++
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Routine Description:
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This routine is a callback into the driver to set the contents of
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a data block. When the driver has finished filling the data block it
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must call WmiCompleteRequest to complete the irp. The driver can
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return STATUS_PENDING if the irp cannot be completed immediately.
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Arguments:
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DeviceObject is the device whose data block is being queried
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Irp is the Irp that makes this request
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GuidIndex is the index into the list of guids provided when the
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device registered
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InstanceIndex is the index that denotes which instance of the data block
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is being queried.
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BufferSize has the size of the data block passed
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Buffer has the new values for the data block
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Return Value:
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status
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--*/
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{
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PDEVICE_EXTENSION deviceExtension;
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NTSTATUS ntStatus;
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ULONG info;
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PAGED_CODE();
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deviceExtension = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
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info = 0;
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SSDbgPrint(3, ("SSSetWmiDataBlock - begins\n"));
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switch(GuidIndex) {
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case WMI_SELECT_SUSPEND_DRIVER_INFORMATION:
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if(BufferSize == sizeof(ULONG)) {
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DebugLevel = *(PULONG) Buffer;
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ntStatus = STATUS_SUCCESS;
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info = sizeof(ULONG);
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}
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else {
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ntStatus = STATUS_INFO_LENGTH_MISMATCH;
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}
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break;
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default:
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ntStatus = STATUS_WMI_GUID_NOT_FOUND;
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}
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ntStatus = WmiCompleteRequest(DeviceObject,
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Irp,
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ntStatus,
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info,
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IO_NO_INCREMENT);
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SSDbgPrint(3, ("SSSetWmiDataBlock - ends\n"));
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return ntStatus;
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}
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PCHAR
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WMIMinorFunctionString (
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UCHAR MinorFunction
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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--*/
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{
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switch (MinorFunction) {
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case IRP_MN_CHANGE_SINGLE_INSTANCE:
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return "IRP_MN_CHANGE_SINGLE_INSTANCE\n";
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case IRP_MN_CHANGE_SINGLE_ITEM:
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return "IRP_MN_CHANGE_SINGLE_ITEM\n";
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case IRP_MN_DISABLE_COLLECTION:
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return "IRP_MN_DISABLE_COLLECTION\n";
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case IRP_MN_DISABLE_EVENTS:
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return "IRP_MN_DISABLE_EVENTS\n";
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case IRP_MN_ENABLE_COLLECTION:
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return "IRP_MN_ENABLE_COLLECTION\n";
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case IRP_MN_ENABLE_EVENTS:
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return "IRP_MN_ENABLE_EVENTS\n";
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case IRP_MN_EXECUTE_METHOD:
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return "IRP_MN_EXECUTE_METHOD\n";
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case IRP_MN_QUERY_ALL_DATA:
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return "IRP_MN_QUERY_ALL_DATA\n";
|
|
|
|
case IRP_MN_QUERY_SINGLE_INSTANCE:
|
|
return "IRP_MN_QUERY_SINGLE_INSTANCE\n";
|
|
|
|
case IRP_MN_REGINFO:
|
|
return "IRP_MN_REGINFO\n";
|
|
|
|
default:
|
|
return "IRP_MN_?????\n";
|
|
}
|
|
} |