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ModifyVirtualSystemResources method of the Msvm_VirtualSystemManagementService class

Modifies the setting data for existing resources on a virtual computer system.

Syntax

uint32 ModifyVirtualSystemResources(
  [in]  CIM_ComputerSystem REF ComputerSystem,
  [in]  string                 ResourceSettingData[],
  [out] CIM_ConcreteJob    REF Job
);

Parameters

ComputerSystem [in]

Type: CIM_ComputerSystem

A reference to the virtual computer system whose resources are to be modified.

ResourceSettingData [in]

Type: string[]

An array of embedded instances of the CIM_ResourceAllocationSettingData class that describe the resources to be modified on the virtual computer system.

Job [out]

Type: CIM_ConcreteJob

An optional reference that is returned if the operation is executed asynchronously. If present, the returned reference to an instance of CIM_ConcreteJob can be used to monitor progress and to obtain the result of the method.

Return value

Type: uint32

If this method is executed synchronously, it returns 0 if it succeeds. If this method is executed asynchronously, it returns 4096 and the Job output parameter can be used to track the progress of the asynchronous operation. Any other return value indicates an error.

Completed with No Error (0)

Method Parameters Checked - Job Started (4096)

Failed (32768)

Access Denied (32769)

Not Supported (32770)

Status is unknown (32771)

Timeout (32772)

Invalid parameter (32773)

System is in used (32774)

Invalid state for this operation (32775)

Incorrect data type (32776)

System is not available (32777)

Out of memory (32778)

Remarks

Access to the Msvm_VirtualSystemManagementService class might be restricted by UAC Filtering. For more information, see User Account Control and WMI.

Examples

The following C# sample modifies the settings for the resources of a virtual system. The referenced utilities can be found in Common Utilities for the Virtualization Samples.

[!Important]
To function correctly, the following code must be run on the VM host server, and must be run with Administrator privileges.

using System;
using System.Management;

namespace HyperVSamples
{
    class ModifyVirtualSystemResourcesClass
    {
        ManagementObject virtualSystemService = null;
        ManagementScope scope = null;

        ModifyVirtualSystemResourcesClass()
        {
            scope = new ManagementScope(@"root\virtualization", null);
            virtualSystemService = Utility.GetServiceObject(scope, "Msvm_VirtualSystemManagementService");
        }

        ManagementObject GetVirtualSystemEthernetPortSetting(ManagementObject vmSetting, string SyntheticNicElementName)
        {
            ManagementObject SyntheticNicSetting = null;
            ManagementObjectCollection SyntheticNicSettings = vmSetting.GetRelated
            (
                "Msvm_SyntheticEthernetPortSettingData",
                "Msvm_VirtualSystemSettingDataComponent",
                null,
                null,
                "PartComponent",
                "GroupComponent",
                false,
                null
            );

            foreach (ManagementObject instance in SyntheticNicSettings)
            {
                if (instance["ElementName"].ToString().ToLower() == SyntheticNicElementName.ToLower())
                {
                    SyntheticNicSetting = instance;
                    break;
                }
            }

            return SyntheticNicSetting;

        }

        void ModifyVirtualSystemResources(string vmName, string syntheticNicName, string address)
        {

            ManagementObject vm = Utility.GetTargetComputer(vmName, scope);
            ManagementObject vmSetting = Utility.GetVirtualSystemSettingData(vm);

            ManagementObject syntheticNicPortSetting = GetVirtualSystemEthernetPortSetting(vmSetting, syntheticNicName);

            if (address == null)
            {
                syntheticNicPortSetting["StaticMacAddress"] = false;
            }
            else
            {
                syntheticNicPortSetting["StaticMacAddress"] = true;
                syntheticNicPortSetting["Address"] = address;
            }

            string[] resources = new string[1];
            resources[0] = syntheticNicPortSetting.GetText(TextFormat.CimDtd20);

            ManagementBaseObject inParams = virtualSystemService.GetMethodParameters("ModifyVirtualSystemResources");

            inParams["ComputerSystem"] = vm.Path.Path;
            inParams["ResourcesettingData"] = resources;

            ManagementBaseObject outParams = virtualSystemService.InvokeMethod("ModifyVirtualSystemResources", inParams, null);

            if ((UInt32)outParams["ReturnValue"] == ReturnCode.Started)
            {
                if (Utility.JobCompleted(outParams, scope))
                {
                    Console.WriteLine("SyntheticNic was modified successfully.");

                }
                else
                {
                    Console.WriteLine("Failed to modify SyntheticNic.");
                }
            }
            else if ((UInt32)outParams["ReturnValue"] == ReturnCode.Completed)
            {
                Console.WriteLine("SyntheticNic was modified successfully.");
            }
            else
            {
                Console.WriteLine("Modify SyntheticNic failed with error : {0}", outParams["ReturnValue"]);
            }

            inParams.Dispose();
            outParams.Dispose();
            vm.Dispose();
            vmSetting.Dispose();
            syntheticNicPortSetting.Dispose();
        }

        void Close()
        {
            this.virtualSystemService.Dispose();
        }

        static void Main(string[] args)
        {
            if (args != null && args.Length != 2 && args.Length != 3)
            {
                Console.WriteLine("Usage: AddVirtualSystemResources vmName syntheticNicName MACAddress");
                Console.WriteLine("MACAddress: Optional. Static MAC address is used if it's specified.");
                Console.WriteLine("Example: AddVirtualSystemResources MyFirstVM myStaticNic 00155D02B317");
                return;
            }

            string address = null;

            if (args.Length == 3)
            {
                address = args[2];

            }
            ModifyVirtualSystemResourcesClass modifyResource = new ModifyVirtualSystemResourcesClass();

            modifyResource.ModifyVirtualSystemResources(args[0], args[1], address);
            modifyResource.Close();
        }
    }
}

The following VBScript sample modifies the settings for the resources of a virtual system.

[!Important]
To function correctly, the following code must be run on the VM host server, and must be run with Administrator privileges.

option explicit 

dim objWMIService
dim managementService
dim fileSystem


const JobStarting = 3
const JobRunning = 4
const JobCompleted = 7
const wmiStarted = 4096
const wmiSuccessful = 0

Main()


'-----------------------------------------------------------------
' Main
'-----------------------------------------------------------------
Sub Main()

    dim objArgs, vmName, nicName, MACAddress, computer, vm
    
    set objArgs = WScript.Arguments

    set objArgs = WScript.Arguments
    if WScript.Arguments.Count = 3 then
        vmName = objArgs.Unnamed.Item(0)
        nicName = objArgs.Unnamed.Item(1)
        MACAddress = objArgs.Unnamed.Item(2)
    elseif WScript.Arguments.Count = 2 then
        vmName = objArgs.Unnamed.Item(0)
        nicName = objArgs.Unnamed.Item(1)
        MACAddress = NULL
    else
        WScript.Echo "usage: cscript ModifyVirtualSystemResource vmName syntheticNicName [MACAddress]"
        WScript.Echo "Example: MyFirstVM myStaticNic 00155D02B302"
        WScript.Quit(1)
    end if

    set fileSystem = Wscript.CreateObject("Scripting.FileSystemObject")
    computer = "."
    set objWMIService = GetObject("winmgmts:\\" & computer & "\root\virtualization")
    set managementService = objWMIService.ExecQuery("select * from Msvm_VirtualSystemManagementService").ItemIndex(0)
 
    set vm = GetComputerSystem(vmName)

    if ModifyVirtualSystemResources(vm, nicName, MACAddress) then
        WriteLog "Done"
        WScript.Quit(0)
    else
        WriteLog "ModifyVirtualSystemResources failed."
        WScript.Quit(1)
    end if


End Sub

'-----------------------------------------------------------------
' Retrieve Msvm_VirtualComputerSystem from base on its ElementName
'-----------------------------------------------------------------
Function GetComputerSystem(vmElementName)
    On Error Resume Next
    dim query
    query = Format1("select * from Msvm_ComputerSystem where ElementName = '{0}'", vmElementName)
    set GetComputerSystem = objWMIService.ExecQuery(query).ItemIndex(0)
    if (Err.Number <> 0) then
        WriteLog Format1("Err.Number: {0}", Err.Number)
        WriteLog Format1("Err.Description:{0}",Err.Description)
        WScript.Quit(1)
    end if
End Function

'-----------------------------------------------------------------
' GetSyntheticEthernetPortSetting
'-----------------------------------------------------------------
Function GetSyntheticEthernetPortSetting(vmSetting, nicName)
    dim query, ethernetsettingsData, instance
    set GetSyntheticEthernetPortSetting = Nothing
    query = Format1("ASSOCIATORS OF {{0}} WHERE " &amp;_
                    "resultClass = Msvm_SyntheticEthernetPortsettingData " &amp;_
                    "AssocClass = Msvm_VirtualSystemSettingDataComponent " &amp;_
                    "ResultRole = PartComponent " &amp;_
                    "Role = GroupComponent", vmSetting.Path_.Path)
                    
    set ethernetsettingsData = objWMIService.ExecQuery(query)
    
    for each instance in ethernetsettingsData
        if lcase(instance.ElementName) = lcase(nicName) then
            set GetSyntheticEthernetPortSetting = instance   
            exit function 
        end if
    next

End Function

'-----------------------------------------------------------------
' ModifyVirtualSystemResources
'-----------------------------------------------------------------
Function ModifyVirtualSystemResources(computerSystem, nicName, MACAddress)

    dim query, virtualSystemSetting, ethernetsettingData
    dim resourcesettings, objInParam, objOutParams
    
    ModifyVirtualSystemResources = false
    
    query = Format1("ASSOCIATORS OF {{0}} WHERE resultClass = Msvm_VirtualSystemsettingData", computerSystem.Path_.Path)
    set virtualSystemSetting = objWMIService.ExecQuery(query).ItemIndex(0)
    
    set ethernetsettingData = GetSyntheticEthernetPortSetting(virtualSystemSetting, nicName)
    
    if (ethernetsettingData Is Nothing) then
        WriteLog Format1("'{0}' does not exist.", nicName)
        exit function
    end if
    
    if IsNull(MACAddress) then
        ethernetsettingData.StaticMacAddress = false
    else
        ethernetsettingData.StaticMacAddress = true
        ethernetsettingData.Address = MACAddress
    end if
    
    resourcesettings = Array(1)
    resourcesettings(0) = ethernetsettingData.GetText_(1)
    
    set objInParam = managementService.Methods_("ModifyVirtualSystemResources").InParameters.SpawnInstance_()
    objInParam.ComputerSystem = computerSystem.Path_.Path
    objInParam.ResourcesettingData = resourcesettings
    
    set objOutParams = managementService.ExecMethod_("ModifyVirtualSystemResources", objInParam)

    if objOutParams.ReturnValue = wmiStarted then
        if (WMIJobCompleted(objOutParams)) then
            WriteLog ("Nic Controller was Modify successfully.")
            ModifyVirtualSystemResources = true
        end if
    elseif  objOutParams.ReturnValue = wmiSuccessful then
        ModifyVirtualSystemResources = true
    else
        WriteLog Format1("Modify synthetic Ethernet failed with error:{0}", outParams.ReturnValue)
    end if
End Function


'-----------------------------------------------------------------
' Handle wmi Job object
'-----------------------------------------------------------------
Function WMIJobCompleted(outParam)

    dim WMIJob, jobState
    WMIJobCompleted = true

    set WMIJob = objWMIService.Get(outParam.Job)
    
    jobState = WMIJob.JobState

    while jobState = JobRunning or jobState = JobStarting
        WriteLog Format1("In progress... {0}% completed.",WMIJob.PercentComplete)
        WScript.Sleep(1000)
        set WMIJob = objWMIService.Get(outParam.Job)
        jobState = WMIJob.JobState
    wend

    if (WMIJob.JobState <> JobCompleted) then
        WriteLog Format1("ErrorDescription:{0}", WMIJob.ErrorDescription)
        WriteLog Format1("ErrorCode:{0}", WMIJob.ErrorCode)
        WMIJobCompleted = false
    end if

End Function
'-----------------------------------------------------------------
' Create the console log files.
'-----------------------------------------------------------------
Sub WriteLog(line)

    dim fileStream
    set fileStream = fileSystem.OpenTextFile(".\ADDSCSIContoller.log", 8, true)
    WScript.Echo line
    fileStream.WriteLine line
    fileStream.Close

End Sub

'------------------------------------------------------------------------------
' The string formatting functions to avoid string concatenation.
'------------------------------------------------------------------------------
Function Format1(myString, arg0)
    Format1 = Replace(myString, "{0}", arg0)
End Function

Requirements

Minimum supported client
None supported
Minimum supported server
Windows Server 2008
End of client support
None supported
End of server support
Windows Server 2012
Namespace
Root\Virtualization
MOF
WindowsVirtualization.mof

See also

ModifyResourceSettings (V2)

Msvm_VirtualSystemManagementService